/* roulang page: index */
:root {
            --bg-primary: #14151A;
            --bg-secondary: #2A2D33;
            --bg-light: #F4F6F5;
            --accent: #C8FF00;
            --accent-dim: rgba(200, 255, 0, 0.1);
            --accent-border: rgba(200, 255, 0, 0.15);
            --copper: #B8865A;
            --text-primary: #E4E6E0;
            --text-secondary: #A8ADA5;
            --text-dark: #1E1F24;
            --radius: 8px;
            --radius-sm: 6px;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.25);
            --shadow-hover: 0 12px 40px rgba(200, 255, 0, 0.15);
            --border-dark: 1px solid rgba(200, 255, 0, 0.15);
            --border-light: 1px solid rgba(0, 0, 0, 0.06);
            --font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --container-max: 1280px;
            --container-pad-desktop: 32px;
            --container-pad-mobile: 16px;
            --nav-height: 68px;
            --footer-height: auto;
            --sticky-bar-height: 64px;
            --section-y-desktop: 100px;
            --section-y-mobile: 68px;
            --card-gap-desktop: 24px;
            --card-gap-mobile: 14px;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-primary);
            background-color: var(--bg-primary);
            padding-bottom: var(--sticky-bar-height);
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: opacity var(--transition), color var(--transition), background-color var(--transition), border-color var(--transition), transform var(--transition);
        }

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            transition: all var(--transition);
        }

        button:focus-visible,
        a:focus-visible,
        input:focus-visible {
            outline: 3px solid rgba(200, 255, 0, 0.6);
            outline-offset: 2px;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: var(--container-pad-desktop);
            padding-right: var(--container-pad-desktop);
            width: 100%;
        }

        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }

        .section {
            padding-top: var(--section-y-desktop);
            padding-bottom: var(--section-y-desktop);
        }

        .section-light {
            background-color: var(--bg-light);
            color: var(--text-dark);
        }

        .section-dark {
            background-color: var(--bg-primary);
            color: var(--text-primary);
        }

        .section-muted {
            background-color: var(--bg-secondary);
            color: var(--text-primary);
        }

        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--accent);
            margin-bottom: 14px;
            padding: 4px 12px;
            border: 1px solid var(--accent-border);
            border-radius: 20px;
            background-color: var(--accent-dim);
        }

        .section-light .section-tag {
            color: #5a7a00;
            border-color: rgba(90, 122, 0, 0.2);
            background-color: rgba(200, 255, 0, 0.08);
        }

        .section-title {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.25;
            margin-bottom: 12px;
            color: inherit;
        }

        .section-light .section-title {
            color: var(--text-dark);
        }

        .section-desc {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 640px;
            line-height: 1.75;
            margin-bottom: 28px;
        }

        .section-light .section-desc {
            color: #555a52;
        }

        /* Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--nav-height);
            z-index: 1000;
            background-color: rgba(20, 21, 26, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(200, 255, 0, 0.1);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }

        .nav-logo {
            font-size: 22px;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: 0.02em;
            white-space: nowrap;
            position: relative;
        }

        .nav-logo .logo-crown {
            color: var(--copper);
            margin-right: 4px;
            font-size: 18px;
            display: inline-block;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
        }

        .nav-links a {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 6px 0;
            position: relative;
            white-space: nowrap;
            transition: color var(--transition), opacity var(--transition);
        }

        .nav-links a:hover {
            color: var(--text-primary);
            opacity: 0.8;
        }

        .nav-links a.active {
            color: var(--accent);
        }

        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            right: 0;
            height: 2px;
            background-color: var(--accent);
            border-radius: 1px;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            background: none;
            border: none;
        }

        .nav-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background-color: var(--text-primary);
            border-radius: 1px;
            transition: all var(--transition);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            inset: 0;
            background-color: var(--bg-primary);
            z-index: 999;
            padding: 80px 24px 40px;
            flex-direction: column;
            align-items: flex-start;
            gap: 20px;
            overflow-y: auto;
        }

        .mobile-menu.open {
            display: flex;
        }

        .mobile-menu a {
            font-size: 26px;
            font-weight: 700;
            color: var(--text-primary);
            padding: 8px 0;
            border-bottom: 1px solid var(--accent-border);
            width: 100%;
        }

        .mobile-menu a.active {
            color: var(--accent);
        }

        .mobile-menu-close {
            position: absolute;
            top: 20px;
            right: 20px;
            font-size: 32px;
            color: var(--text-primary);
            background: none;
            border: none;
            line-height: 1;
        }

        /* Hero */
        .hero {
            min-height: 85vh;
            display: flex;
            align-items: center;
            position: relative;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            margin-top: 0;
            padding-top: var(--nav-height);
            isolation: isolate;
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(20, 21, 26, 0.82) 0%, rgba(20, 21, 26, 0.55) 50%, rgba(20, 21, 26, 0.9) 100%);
            z-index: -1;
        }

        .hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent) 0%, var(--accent) 40%, transparent 40%, transparent 60%, var(--copper) 60%, var(--copper) 100%);
            z-index: 1;
        }

        .hero-content {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 48px;
            align-items: center;
            width: 100%;
            padding-top: 40px;
            padding-bottom: 60px;
        }

        .hero-text h1 {
            font-size: 46px;
            font-weight: 800;
            line-height: 1.2;
            color: #fff;
            margin-bottom: 20px;
            letter-spacing: 0.01em;
        }

        .hero-text h1 .highlight {
            color: var(--accent);
        }

        .hero-subtitle {
            font-size: 17px;
            line-height: 1.75;
            color: var(--text-primary);
            max-width: 560px;
            margin-bottom: 32px;
        }

        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 28px;
            border-radius: var(--radius);
            font-size: 15px;
            font-weight: 700;
            transition: all var(--transition);
            text-align: center;
            min-width: 120px;
            border: none;
            line-height: 1.4;
        }

        .btn-primary {
            background-color: var(--accent);
            color: #14151A;
        }

        .btn-primary:hover {
            background-color: #d9ff33;
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: var(--shadow-card);
        }

        .btn-secondary {
            background-color: transparent;
            color: var(--accent);
            border: 1px solid var(--accent);
        }

        .btn-secondary:hover {
            background-color: var(--accent-dim);
            transform: translateY(-2px);
        }

        .btn-secondary:active {
            transform: translateY(0);
        }

        .hero-data-panel {
            background: rgba(42, 45, 51, 0.85);
            border: 1px solid var(--accent-border);
            border-radius: var(--radius);
            padding: 28px 24px;
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
        }

        .hero-data-panel h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--accent);
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }

        .hero-data-panel ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .hero-data-panel li {
            font-size: 14px;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 6px 0;
            border-bottom: 1px solid rgba(200, 255, 0, 0.08);
        }

        .hero-data-panel li:last-child {
            border-bottom: none;
        }

        .hero-data-panel .dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: var(--accent);
            flex-shrink: 0;
        }

        .hero-metrics {
            display: flex;
            gap: 32px;
            margin-top: 36px;
            flex-wrap: wrap;
        }

        .hero-metric {
            display: flex;
            flex-direction: column;
        }

        .hero-metric .value {
            font-size: 28px;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
        }

        .hero-metric .label {
            font-size: 13px;
            color: var(--text-secondary);
            margin-top: 4px;
        }

        .hero-scroll-hint {
            position: absolute;
            bottom: 28px;
            left: 50%;
            transform: translateX(-50%);
            width: 30px;
            height: 42px;
            border: 2px solid rgba(200, 255, 0, 0.5);
            border-radius: 20px;
            display: flex;
            justify-content: center;
            padding-top: 6px;
            z-index: 2;
        }

        .hero-scroll-hint::after {
            content: '';
            width: 3px;
            height: 10px;
            background-color: var(--accent);
            border-radius: 2px;
            animation: scrollHint 1.6s infinite;
        }

        @keyframes scrollHint {
            0% {
                transform: translateY(0);
                opacity: 1;
            }
            70% {
                transform: translateY(12px);
                opacity: 0;
            }
            100% {
                transform: translateY(0);
                opacity: 0;
            }
        }

        /* Feature asymmetric */
        .feature-asymmetric {
            display: grid;
            grid-template-columns: 8fr 4fr;
            gap: var(--card-gap-desktop);
            align-items: stretch;
        }

        .feature-main-card {
            background-color: var(--bg-secondary);
            border: var(--border-dark);
            border-radius: var(--radius);
            padding: 40px 36px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            min-height: 320px;
            position: relative;
            overflow: hidden;
            transition: all var(--transition);
        }

        .feature-main-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }

        .feature-main-card::after {
            content: '';
            position: absolute;
            top: -40px;
            right: -40px;
            width: 180px;
            height: 180px;
            border: 2px solid rgba(200, 255, 0, 0.15);
            border-radius: 50%;
            pointer-events: none;
        }

        .feature-side-stack {
            display: flex;
            flex-direction: column;
            gap: var(--card-gap-desktop);
        }

        .feature-side-card {
            background-color: var(--bg-secondary);
            border: var(--border-dark);
            border-radius: var(--radius);
            padding: 24px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
            justify-content: center;
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }

        .feature-side-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        .feature-side-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent), transparent);
            border-radius: var(--radius-sm) var(--radius-sm) 0 0;
        }

        .feature-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-sm);
            background-color: var(--accent-dim);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 16px;
            font-size: 22px;
            font-weight: 800;
            color: var(--accent);
            border: 1px solid var(--accent-border);
        }

        .feature-title {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-primary);
        }

        .feature-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* Deep content blocks */
        .deep-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .deep-block.reverse {
            direction: rtl;
        }

        .deep-block.reverse>* {
            direction: ltr;
        }

        .deep-text h2 {
            font-size: 28px;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 16px;
        }

        .deep-text p {
            font-size: 16px;
            line-height: 1.8;
            margin-bottom: 14px;
            color: var(--text-secondary);
        }

        .section-light .deep-text p {
            color: #555a52;
        }

        .deep-text .btn {
            margin-top: 10px;
        }

        .deep-image {
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            aspect-ratio: 16/10;
            background-color: var(--bg-secondary);
            border: 1px solid var(--accent-border);
        }

        .deep-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition);
        }

        .deep-image:hover img {
            transform: scale(1.02);
        }

        /* Brand intro */
        .brand-intro {
            background-color: var(--bg-light);
            color: var(--text-dark);
            border-radius: var(--radius);
            padding: 48px 44px;
            position: relative;
            overflow: hidden;
        }

        .brand-intro::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 200px;
            height: 200px;
            border: 3px solid rgba(184, 134, 90, 0.2);
            border-radius: 50%;
            pointer-events: none;
        }

        .brand-intro h2 {
            font-size: 26px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-dark);
        }

        .brand-intro p {
            font-size: 16px;
            line-height: 1.85;
            color: #444a42;
            max-width: 860px;
        }

        /* Collection directory */
        .collection-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--card-gap-desktop);
        }

        .collection-card {
            background-color: var(--bg-secondary);
            border: var(--border-dark);
            border-radius: var(--radius);
            padding: 28px 24px;
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }

        .collection-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: var(--accent);
        }

        .collection-card .count {
            font-size: 13px;
            font-weight: 600;
            color: var(--accent);
            display: block;
            margin-bottom: 8px;
            letter-spacing: 0.05em;
        }

        .collection-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-primary);
        }

        .collection-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.65;
            margin-bottom: 16px;
        }

        .collection-card .btn-link {
            font-size: 14px;
            font-weight: 700;
            color: var(--accent);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .collection-card .btn-link:hover {
            opacity: 0.75;
        }

        /* Milestone */
        .milestone-strip {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--card-gap-desktop);
            position: relative;
        }

        .milestone-strip::before {
            content: '';
            position: absolute;
            top: 28px;
            left: 0;
            right: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--accent-border), var(--accent) 30%, var(--accent) 70%, var(--accent-border));
            z-index: 0;
        }

        .milestone-item {
            text-align: center;
            position: relative;
            z-index: 1;
        }

        .milestone-dot {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background-color: var(--accent);
            color: #14151A;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 800;
            margin: 0 auto 14px;
            border: 4px solid var(--bg-primary);
            box-shadow: 0 0 0 2px var(--accent-border);
        }

        .milestone-item h4 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--text-primary);
        }

        .milestone-item p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* News */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--card-gap-desktop);
        }

        .news-item {
            background-color: var(--bg-secondary);
            border: var(--border-dark);
            border-radius: var(--radius);
            padding: 24px 22px;
            transition: all var(--transition);
        }

        .news-item:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
            border-color: rgba(200, 255, 0, 0.35);
        }

        .news-date {
            font-size: 13px;
            color: var(--accent);
            font-weight: 600;
            margin-bottom: 6px;
            letter-spacing: 0.04em;
        }

        .news-item h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-primary);
            line-height: 1.4;
        }

        .news-item p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 14px;
        }

        .news-item .btn-link {
            font-size: 14px;
            font-weight: 700;
            color: var(--accent);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .news-item .btn-link:hover {
            opacity: 0.75;
        }

        /* Platform guarantee */
        .guarantee-badges {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: var(--card-gap-desktop);
        }

        .guarantee-badge {
            text-align: center;
            padding: 28px 18px;
            background-color: var(--bg-secondary);
            border: var(--border-dark);
            border-radius: var(--radius);
            transition: all var(--transition);
        }

        .guarantee-badge:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }

        .guarantee-badge .badge-icon {
            font-size: 30px;
            font-weight: 800;
            color: var(--copper);
            margin-bottom: 10px;
            display: block;
        }

        .guarantee-badge h4 {
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--text-primary);
        }

        .guarantee-badge p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* Social proof strip */
        .social-strip {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            padding: 28px 0;
            border-top: 1px solid var(--accent-border);
            border-bottom: 1px solid var(--accent-border);
        }

        .social-stat {
            text-align: center;
        }

        .social-stat .stat-value {
            font-size: 34px;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
            display: block;
        }

        .social-stat .stat-label {
            font-size: 14px;
            color: var(--text-secondary);
            margin-top: 4px;
        }

        /* FAQ */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background-color: var(--bg-secondary);
            border: var(--border-dark);
            border-radius: var(--radius);
            overflow: hidden;
            transition: all var(--transition);
        }

        .faq-item.open {
            border-left: 4px solid var(--accent);
        }

        .faq-question {
            width: 100%;
            text-align: left;
            padding: 18px 20px;
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
            background: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            line-height: 1.5;
        }

        .faq-question .faq-icon {
            font-size: 20px;
            font-weight: 800;
            color: var(--accent);
            transition: transform var(--transition);
            flex-shrink: 0;
        }

        .faq-item.open .faq-question .faq-icon {
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
            padding: 0 20px;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding-bottom: 18px;
        }

        .faq-answer p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.75;
        }

        /* Sticky bottom bar */
        .sticky-cta-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            height: var(--sticky-bar-height);
            background-color: rgba(20, 21, 26, 0.95);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border-top: 1px solid rgba(200, 255, 0, 0.2);
            z-index: 998;
            display: flex;
            align-items: center;
        }

        .sticky-cta-bar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }

        .sticky-cta-text {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            white-space: nowrap;
        }

        .sticky-cta-bar .btn {
            padding: 10px 22px;
            font-size: 14px;
            min-width: auto;
            white-space: nowrap;
        }

        /* Footer */
        .site-footer {
            background-color: #0E0F13;
            border-top: 1px solid var(--accent-border);
            padding: 40px 0 32px;
            margin-bottom: 0;
        }

        .footer-brand {
            font-size: 20px;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 12px;
        }

        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            margin-bottom: 16px;
            list-style: none;
        }

        .footer-links a {
            font-size: 14px;
            color: var(--text-secondary);
            transition: color var(--transition);
        }

        .footer-links a:hover {
            color: var(--accent);
        }

        .footer-bottom {
            font-size: 13px;
            color: #6a6e66;
            line-height: 1.7;
            border-top: 1px solid rgba(200, 255, 0, 0.08);
            padding-top: 16px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 10px;
        }

        .footer-bottom a {
            color: #8a8f86;
            transition: color var(--transition);
        }

        .footer-bottom a:hover {
            color: var(--accent);
        }

        /* Responsive */
        @media (max-width: 1440px) {
            :root {
                --container-pad-desktop: 28px;
                --section-y-desktop: 88px;
            }
            .hero-text h1 {
                font-size: 40px;
            }
        }

        @media (max-width: 1024px) {
            :root {
                --container-pad-desktop: 20px;
                --section-y-desktop: 72px;
                --card-gap-desktop: 18px;
            }
            .nav-links {
                gap: 18px;
            }
            .nav-links a {
                font-size: 13px;
            }
            .hero {
                min-height: 72vh;
            }
            .hero-content {
                grid-template-columns: 1fr;
                gap: 32px;
                padding-top: 30px;
                padding-bottom: 50px;
            }
            .hero-text h1 {
                font-size: 36px;
            }
            .hero-data-panel {
                max-width: 480px;
            }
            .feature-asymmetric {
                grid-template-columns: 7fr 5fr;
            }
            .deep-block {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .deep-block.reverse {
                direction: ltr;
            }
            .collection-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .milestone-strip {
                grid-template-columns: repeat(2, 1fr);
                gap: 28px;
            }
            .milestone-strip::before {
                display: none;
            }
            .guarantee-badges {
                grid-template-columns: repeat(3, 1fr);
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
            .social-strip {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --container-pad-mobile: 16px;
                --section-y-mobile: 60px;
                --card-gap-mobile: 12px;
                --nav-height: 60px;
                --sticky-bar-height: 56px;
            }
            body {
                padding-bottom: var(--sticky-bar-height);
                font-size: 15px;
            }
            .container {
                padding-left: var(--container-pad-mobile);
                padding-right: var(--container-pad-mobile);
            }
            .section {
                padding-top: var(--section-y-mobile);
                padding-bottom: var(--section-y-mobile);
            }
            .section-title {
                font-size: 24px;
            }
            .nav-links {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .hero {
                min-height: 66vh;
            }
            .hero-content {
                grid-template-columns: 1fr;
                gap: 24px;
                padding-top: 20px;
                padding-bottom: 48px;
            }
            .hero-text h1 {
                font-size: 30px;
            }
            .hero-subtitle {
                font-size: 15px;
            }
            .hero-actions {
                gap: 10px;
            }
            .btn {
                padding: 12px 20px;
                font-size: 14px;
                min-width: 100px;
            }
            .hero-data-panel {
                padding: 20px 16px;
            }
            .hero-metrics {
                gap: 20px;
                margin-top: 24px;
            }
            .hero-metric .value {
                font-size: 22px;
            }
            .feature-asymmetric {
                grid-template-columns: 1fr;
                gap: var(--card-gap-mobile);
            }
            .feature-main-card {
                min-height: auto;
                padding: 28px 22px;
            }
            .feature-side-stack {
                gap: var(--card-gap-mobile);
            }
            .feature-side-card {
                padding: 20px 18px;
            }
            .deep-block {
                gap: 20px;
            }
            .deep-text h2 {
                font-size: 22px;
            }
            .deep-text p {
                font-size: 15px;
                line-height: 1.75;
            }
            .deep-image {
                aspect-ratio: 16/9;
            }
            .brand-intro {
                padding: 30px 20px;
            }
            .brand-intro h2 {
                font-size: 22px;
            }
            .collection-grid {
                grid-template-columns: 1fr;
                gap: var(--card-gap-mobile);
            }
            .milestone-strip {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .guarantee-badges {
                grid-template-columns: 1fr 1fr;
                gap: var(--card-gap-mobile);
            }
            .news-grid {
                grid-template-columns: 1fr;
                gap: var(--card-gap-mobile);
            }
            .news-item {
                padding: 18px 16px;
            }
            .social-strip {
                grid-template-columns: 1fr 1fr;
                gap: 18px;
                padding: 20px 0;
            }
            .social-stat .stat-value {
                font-size: 26px;
            }
            .faq-question {
                padding: 14px 16px;
                font-size: 15px;
            }
            .faq-answer {
                padding: 0 16px;
            }
            .faq-item.open .faq-answer {
                padding-bottom: 14px;
            }
            .sticky-cta-text {
                font-size: 13px;
            }
            .sticky-cta-bar .btn {
                padding: 8px 16px;
                font-size: 13px;
            }
            .site-footer {
                padding: 28px 0 20px;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 6px;
                font-size: 12px;
            }
        }

        @media (max-width: 520px) {
            .hero-text h1 {
                font-size: 26px;
            }
            .hero-subtitle {
                font-size: 14px;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .btn {
                width: 100%;
            }
            .hero-data-panel {
                padding: 16px 14px;
            }
            .hero-metrics {
                gap: 14px;
                flex-wrap: wrap;
            }
            .hero-metric .value {
                font-size: 20px;
            }
            .guarantee-badges {
                grid-template-columns: 1fr;
            }
            .social-strip {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .social-stat .stat-value {
                font-size: 22px;
            }
            .collection-card {
                padding: 20px 16px;
            }
            .brand-intro {
                padding: 24px 16px;
            }
            .brand-intro p {
                font-size: 14px;
                line-height: 1.75;
            }
            .sticky-cta-text {
                font-size: 12px;
                white-space: normal;
                line-height: 1.3;
            }
            .sticky-cta-bar .container {
                gap: 10px;
            }
        }

/* roulang page: category2 */
:root {
            --bg-primary: #14151A;
            --bg-secondary: #2A2D33;
            --bg-light: #F4F6F5;
            --accent: #C8FF00;
            --accent-dim: rgba(200, 255, 0, 0.1);
            --accent-border: rgba(200, 255, 0, 0.15);
            --copper: #B8865A;
            --text-primary: #E4E6E0;
            --text-secondary: #A8ADA5;
            --text-dark: #1E1F24;
            --radius: 8px;
            --radius-sm: 6px;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.25);
            --shadow-hover: 0 12px 40px rgba(200, 255, 0, 0.15);
            --border-dark: 1px solid rgba(200, 255, 0, 0.15);
            --border-light: 1px solid rgba(0, 0, 0, 0.06);
            --font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --container-max: 1280px;
            --container-pad-desktop: 28px;
            --container-pad-mobile: 16px;
            --nav-height: 68px;
            --footer-height: auto;
            --sticky-bar-height: 64px;
            --section-y-desktop: 88px;
            --section-y-mobile: 60px;
            --card-gap-desktop: 18px;
            --card-gap-mobile: 12px;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-primary);
            background-color: var(--bg-primary);
            padding-bottom: var(--sticky-bar-height);
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: opacity var(--transition), color var(--transition), background-color var(--transition), border-color var(--transition), transform var(--transition);
        }

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            transition: all var(--transition);
        }

        button:focus-visible,
        a:focus-visible,
        input:focus-visible {
            outline: 3px solid rgba(200, 255, 0, 0.6);
            outline-offset: 2px;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: var(--container-pad-desktop);
            padding-right: var(--container-pad-desktop);
            width: 100%;
        }

        .section {
            padding-top: var(--section-y-desktop);
            padding-bottom: var(--section-y-desktop);
        }

        .section-light {
            background-color: var(--bg-light);
            color: var(--text-dark);
        }

        .section-dark {
            background-color: var(--bg-primary);
            color: var(--text-primary);
        }

        .section-muted {
            background-color: var(--bg-secondary);
            color: var(--text-primary);
        }

        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--accent);
            margin-bottom: 14px;
            padding: 4px 12px;
            border: 1px solid var(--accent-border);
            border-radius: 20px;
            background-color: var(--accent-dim);
        }

        .section-light .section-tag {
            color: #5a7a00;
            border-color: rgba(90, 122, 0, 0.2);
            background-color: rgba(200, 255, 0, 0.08);
        }

        .section-title {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.25;
            margin-bottom: 12px;
            color: inherit;
        }

        .section-light .section-title {
            color: var(--text-dark);
        }

        .section-desc {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 640px;
            line-height: 1.75;
            margin-bottom: 28px;
        }

        .section-light .section-desc {
            color: #555a52;
        }

        /* Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--nav-height);
            z-index: 1000;
            background-color: rgba(20, 21, 26, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(200, 255, 0, 0.1);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }

        .nav-logo {
            font-size: 22px;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: 0.02em;
            white-space: nowrap;
            position: relative;
        }

        .nav-logo .logo-crown {
            color: var(--copper);
            margin-right: 4px;
            font-size: 18px;
            display: inline-block;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
        }

        .nav-links a {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            position: relative;
            padding-bottom: 4px;
            transition: color var(--transition), opacity var(--transition);
        }

        .nav-links a:hover {
            color: var(--text-primary);
            opacity: 0.85;
        }

        .nav-links a.active {
            color: var(--accent);
        }

        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            right: 0;
            height: 2px;
            background-color: var(--accent);
            border-radius: 1px;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            z-index: 1001;
        }

        .nav-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background-color: var(--text-primary);
            border-radius: 1px;
            transition: all var(--transition);
        }

        /* Breadcrumb */
        .breadcrumb-wrapper {
            margin-top: var(--nav-height);
            padding: 20px 0 0;
            background-color: var(--bg-primary);
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-secondary);
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--text-secondary);
            transition: color var(--transition);
        }

        .breadcrumb a:hover {
            color: var(--accent);
        }

        .breadcrumb .separator {
            color: var(--text-secondary);
            opacity: 0.5;
        }

        .breadcrumb .current {
            color: var(--accent);
            font-weight: 500;
        }

        /* Page Header */
        .page-header {
            padding: 48px 0 32px;
            background-color: var(--bg-primary);
            position: relative;
            overflow: hidden;
        }

        .page-header::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.12;
            pointer-events: none;
        }

        .page-header .container {
            position: relative;
            z-index: 1;
        }

        .page-header-title {
            font-size: 36px;
            font-weight: 700;
            line-height: 1.25;
            color: var(--text-primary);
            margin-bottom: 14px;
        }

        .page-header-desc {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 720px;
            line-height: 1.75;
        }

        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 700;
            padding: 12px 28px;
            border-radius: var(--radius);
            transition: all var(--transition);
            white-space: nowrap;
            line-height: 1.4;
        }

        .btn-primary {
            background-color: var(--accent);
            color: var(--bg-primary);
            box-shadow: 0 2px 12px rgba(200, 255, 0, 0.25);
        }

        .btn-primary:hover {
            background-color: #d8ff4a;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(200, 255, 0, 0.35);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(200, 255, 0, 0.2);
        }

        .btn-secondary {
            background-color: transparent;
            border: 1px solid var(--accent);
            color: var(--accent);
        }

        .btn-secondary:hover {
            background-color: var(--accent-dim);
            transform: translateY(-2px);
        }

        .btn-secondary:active {
            transform: translateY(0);
        }

        .btn-dark {
            background-color: var(--bg-primary);
            color: var(--accent);
            border: 1px solid var(--bg-primary);
        }

        .btn-dark:hover {
            background-color: #22242b;
            transform: translateY(-2px);
            box-shadow: var(--shadow-card);
        }

        /* Deep Content Flow */
        .deep-flow {
            padding-top: var(--section-y-desktop);
            padding-bottom: var(--section-y-desktop);
        }

        .deep-flow-item {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
            margin-bottom: 80px;
        }

        .deep-flow-item:last-child {
            margin-bottom: 0;
        }

        .deep-flow-item.reverse .deep-flow-image {
            order: 2;
        }

        .deep-flow-item.reverse .deep-flow-content {
            order: 1;
        }

        .deep-flow-image {
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            position: relative;
            aspect-ratio: 4 / 3;
            background-color: var(--bg-secondary);
        }

        .deep-flow-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .deep-flow-image:hover img {
            transform: scale(1.03);
        }

        .deep-flow-content h3 {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 14px;
            color: inherit;
            line-height: 1.35;
        }

        .deep-flow-content p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 14px;
        }

        .section-light .deep-flow-content p {
            color: #555a52;
        }

        .deep-flow-content .highlight-stat {
            display: flex;
            align-items: baseline;
            gap: 12px;
            margin-top: 20px;
            padding: 16px 20px;
            background-color: var(--accent-dim);
            border: 1px solid var(--accent-border);
            border-radius: var(--radius);
        }

        .section-light .highlight-stat {
            background-color: rgba(200, 255, 0, 0.08);
            border-color: rgba(90, 122, 0, 0.2);
        }

        .highlight-stat .stat-number {
            font-size: 32px;
            font-weight: 800;
            color: var(--accent);
            line-height: 1;
        }

        .section-light .highlight-stat .stat-number {
            color: #5a7a00;
        }

        .highlight-stat .stat-label {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
        }

        .section-light .highlight-stat .stat-label {
            color: #555a52;
        }

        /* CTA Section */
        .cta-section {
            background-color: var(--bg-secondary);
            padding: 64px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -10%;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            border: 2px dashed rgba(200, 255, 0, 0.1);
            pointer-events: none;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -40%;
            left: -5%;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            border: 1px solid rgba(200, 255, 0, 0.08);
            pointer-events: none;
        }

        .cta-section .container {
            position: relative;
            z-index: 1;
            text-align: center;
        }

        .cta-section h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 14px;
            line-height: 1.3;
        }

        .cta-section p {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 auto 28px;
            line-height: 1.75;
        }

        .cta-buttons {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* Footer */
        .site-footer {
            background-color: var(--bg-primary);
            border-top: 1px solid rgba(200, 255, 0, 0.1);
            padding: 48px 0 32px;
        }

        .site-footer .container {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .footer-brand {
            font-size: 20px;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: 0.02em;
        }

        .footer-brand .logo-crown {
            color: var(--copper);
        }

        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-links a {
            font-size: 14px;
            color: var(--text-secondary);
            transition: color var(--transition);
        }

        .footer-links a:hover {
            color: var(--accent);
        }

        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
            font-size: 13px;
            color: var(--text-secondary);
            border-top: 1px solid rgba(200, 255, 0, 0.08);
            padding-top: 20px;
        }

        .footer-bottom a {
            color: var(--text-secondary);
            transition: color var(--transition);
        }

        .footer-bottom a:hover {
            color: var(--accent);
        }

        .footer-bottom span {
            white-space: nowrap;
        }

        /* Sticky Bar */
        .sticky-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            height: var(--sticky-bar-height);
            background-color: rgba(20, 21, 26, 0.96);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border-top: 1px solid rgba(200, 255, 0, 0.15);
            z-index: 999;
            display: flex;
            align-items: center;
        }

        .sticky-bar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }

        .sticky-bar-text {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .sticky-bar .btn {
            padding: 10px 20px;
            font-size: 14px;
            flex-shrink: 0;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .deep-flow-item {
                gap: 32px;
                margin-bottom: 56px;
            }

            .deep-flow-content h3 {
                font-size: 22px;
            }

            .page-header-title {
                font-size: 30px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --nav-height: 60px;
                --sticky-bar-height: 56px;
                --section-y-desktop: 60px;
                --section-y-mobile: 48px;
                --card-gap-desktop: 14px;
                --card-gap-mobile: 12px;
                --container-pad-desktop: 16px;
            }

            .nav-links {
                position: fixed;
                top: 0;
                right: -100%;
                width: 80%;
                max-width: 320px;
                height: 100vh;
                background-color: rgba(20, 21, 26, 0.98);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                align-items: flex-start;
                justify-content: center;
                gap: 24px;
                padding: 48px 32px;
                transition: right 0.35s cubic-bezier(0.4, 0, 0.2, 1);
                z-index: 1000;
                border-left: 1px solid rgba(200, 255, 0, 0.1);
            }

            .nav-links.open {
                right: 0;
            }

            .nav-links a {
                font-size: 18px;
                font-weight: 600;
                color: var(--text-primary);
            }

            .nav-links a.active {
                color: var(--accent);
            }

            .nav-links a.active::after {
                bottom: -4px;
            }

            .nav-toggle {
                display: flex;
            }

            .nav-toggle.active span:nth-child(1) {
                transform: translateY(7px) rotate(45deg);
            }

            .nav-toggle.active span:nth-child(2) {
                opacity: 0;
            }

            .nav-toggle.active span:nth-child(3) {
                transform: translateY(-7px) rotate(-45deg);
            }

            .deep-flow-item {
                grid-template-columns: 1fr;
                gap: 24px;
                margin-bottom: 48px;
            }

            .deep-flow-item.reverse .deep-flow-image {
                order: 1;
            }

            .deep-flow-item.reverse .deep-flow-content {
                order: 2;
            }

            .deep-flow-image {
                aspect-ratio: 16 / 10;
            }

            .page-header {
                padding: 32px 0 24px;
            }

            .page-header-title {
                font-size: 26px;
            }

            .section-title {
                font-size: 26px;
            }

            .cta-section h2 {
                font-size: 24px;
            }

            .sticky-bar .container {
                flex-direction: row;
            }

            .sticky-bar-text {
                font-size: 13px;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
        }

        @media (max-width: 520px) {
            .page-header-title {
                font-size: 22px;
            }

            .deep-flow-content h3 {
                font-size: 20px;
            }

            .btn {
                padding: 10px 20px;
                font-size: 14px;
            }

            .cta-buttons {
                flex-direction: column;
                align-items: center;
            }

            .cta-buttons .btn {
                width: 100%;
                max-width: 280px;
            }

            .highlight-stat {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }

            .highlight-stat .stat-number {
                font-size: 28px;
            }
        }

/* roulang page: category3 */
:root {
            --bg-primary: #14151A;
            --bg-secondary: #2A2D33;
            --bg-light: #F4F6F5;
            --accent: #C8FF00;
            --accent-dim: rgba(200, 255, 0, 0.1);
            --accent-border: rgba(200, 255, 0, 0.15);
            --copper: #B8865A;
            --text-primary: #E4E6E0;
            --text-secondary: #A8ADA5;
            --text-dark: #1E1F24;
            --radius: 8px;
            --radius-sm: 6px;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.25);
            --shadow-hover: 0 12px 40px rgba(200, 255, 0, 0.15);
            --border-dark: 1px solid rgba(200, 255, 0, 0.15);
            --border-light: 1px solid rgba(0, 0, 0, 0.06);
            --font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --container-max: 1280px;
            --container-pad-desktop: 32px;
            --container-pad-mobile: 16px;
            --nav-height: 68px;
            --footer-height: auto;
            --sticky-bar-height: 64px;
            --section-y-desktop: 100px;
            --section-y-mobile: 68px;
            --card-gap-desktop: 24px;
            --card-gap-mobile: 14px;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        @media (max-width: 1024px) {
            :root {
                --container-pad-desktop: 28px;
                --section-y-desktop: 88px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --container-pad-desktop: 20px;
                --section-y-desktop: 72px;
                --card-gap-desktop: 18px;
                --nav-height: 60px;
                --sticky-bar-height: 56px;
            }
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-primary);
            background-color: var(--bg-primary);
            padding-bottom: var(--sticky-bar-height);
            overflow-x: hidden;
            margin: 0;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: opacity var(--transition), color var(--transition), background-color var(--transition), border-color var(--transition), transform var(--transition);
        }

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            transition: all var(--transition);
        }

        button:focus-visible,
        a:focus-visible,
        input:focus-visible {
            outline: 3px solid rgba(200, 255, 0, 0.6);
            outline-offset: 2px;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: var(--container-pad-desktop);
            padding-right: var(--container-pad-desktop);
            width: 100%;
        }

        .section {
            padding-top: var(--section-y-desktop);
            padding-bottom: var(--section-y-desktop);
        }

        .section-light {
            background-color: var(--bg-light);
            color: var(--text-dark);
        }

        .section-dark {
            background-color: var(--bg-primary);
            color: var(--text-primary);
        }

        .section-muted {
            background-color: var(--bg-secondary);
            color: var(--text-primary);
        }

        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--accent);
            margin-bottom: 14px;
            padding: 4px 12px;
            border: 1px solid var(--accent-border);
            border-radius: 20px;
            background-color: var(--accent-dim);
        }

        .section-title {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.25;
            margin-bottom: 12px;
            color: inherit;
        }

        .section-desc {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 680px;
            line-height: 1.75;
            margin-bottom: 28px;
        }

        /* Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--nav-height);
            z-index: 1000;
            background-color: rgba(20, 21, 26, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(200, 255, 0, 0.1);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }

        .nav-logo {
            font-size: 22px;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: 0.02em;
            white-space: nowrap;
            position: relative;
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .nav-logo .logo-crown {
            color: var(--copper);
            font-size: 18px;
            display: inline-block;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
        }

        .nav-links a {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            position: relative;
            white-space: nowrap;
            padding: 4px 0;
        }

        .nav-links a:hover {
            color: var(--text-primary);
            opacity: 0.85;
        }

        .nav-links a.active {
            color: var(--accent);
        }

        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            right: 0;
            height: 2px;
            background-color: var(--accent);
            border-radius: 2px;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            background: none;
            border: none;
            cursor: pointer;
            z-index: 1001;
        }

        .nav-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background-color: var(--text-primary);
            border-radius: 2px;
            transition: all var(--transition);
        }

        /* Mobile nav overlay */
        .nav-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-color: rgba(20, 21, 26, 0.97);
            z-index: 999;
            padding: 80px 32px 40px;
            flex-direction: column;
            gap: 16px;
            overflow-y: auto;
        }

        .nav-overlay.open {
            display: flex;
        }

        .nav-overlay a {
            font-size: 22px;
            font-weight: 600;
            color: var(--text-primary);
            padding: 8px 0;
            border-bottom: 1px solid rgba(200, 255, 0, 0.08);
        }

        .nav-overlay a.active {
            color: var(--accent);
        }

        /* Breadcrumb */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--text-secondary);
            transition: color var(--transition);
        }

        .breadcrumb a:hover {
            color: var(--accent);
        }

        .breadcrumb .separator {
            color: var(--copper);
            font-size: 12px;
        }

        .breadcrumb .current {
            color: var(--accent);
            font-weight: 500;
        }

        /* Category Page Header */
        .category-header {
            background-color: var(--bg-primary);
            padding-top: calc(var(--nav-height) + 40px);
            padding-bottom: 48px;
            border-bottom: 1px solid var(--accent-border);
            position: relative;
            overflow: hidden;
        }

        .category-header::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(200, 255, 0, 0.04) 0%, transparent 60%);
            pointer-events: none;
            z-index: 0;
        }

        .category-header .header-content {
            position: relative;
            z-index: 1;
        }

        .category-header h1 {
            font-size: 38px;
            font-weight: 800;
            line-height: 1.2;
            color: var(--text-primary);
            margin: 0 0 16px;
            letter-spacing: 0.01em;
        }

        .category-header .header-desc {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 720px;
            line-height: 1.8;
            margin-bottom: 20px;
        }

        .category-header .header-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 13px;
            color: var(--text-secondary);
            flex-wrap: wrap;
        }

        .category-header .header-meta .status-badge {
            background-color: var(--accent-dim);
            color: var(--accent);
            padding: 4px 12px;
            border-radius: 20px;
            font-weight: 600;
            font-size: 12px;
            border: 1px solid var(--accent-border);
        }

        /* Live list stream */
        .live-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .live-list-item {
            display: grid;
            grid-template-columns: 220px 1fr 180px;
            gap: 20px;
            background-color: var(--bg-primary);
            border: var(--border-dark);
            border-radius: var(--radius);
            box-shadow: var(--shadow-card);
            padding: 20px;
            transition: all var(--transition);
            position: relative;
        }

        .live-list-item:hover {
            box-shadow: var(--shadow-hover);
            border-color: rgba(200, 255, 0, 0.3);
            transform: translateY(-3px);
        }

        .live-list-item .coverpic-wrapper {
            width: 100%;
            height: 140px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            position: relative;
            background-color: var(--bg-secondary);
        }

        .live-list-item .coverpic-wrapper img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: var(--radius-sm);
            transition: transform var(--transition);
        }

        .live-list-item:hover .coverpic-wrapper img {
            transform: scale(1.04);
        }

        .live-list-item .coverpic-wrapper .live-indicator {
            position: absolute;
            top: 10px;
            left: 10px;
            background-color: #e74c3c;
            color: #fff;
            font-size: 11px;
            font-weight: 700;
            padding: 3px 10px;
            border-radius: 12px;
            letter-spacing: 0.05em;
            z-index: 2;
            display: flex;
            align-items: center;
            gap: 5px;
        }

        .live-list-item .coverpic-wrapper .live-indicator::before {
            content: '';
            width: 6px;
            height: 6px;
            background-color: #fff;
            border-radius: 50%;
            animation: pulse-dot 1.2s ease-in-out infinite;
        }

        @keyframes pulse-dot {
            0%, 100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.5;
                transform: scale(1.4);
            }
        }

        .live-list-item .list-content {
            display: flex;
            flex-direction: column;
            justify-content: center;
            gap: 8px;
        }

        .live-list-item .match-title {
            font-size: 19px;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.3;
            margin: 0;
        }

        .live-list-item .match-title .vs-text {
            color: var(--accent);
            font-weight: 800;
            margin: 0 4px;
        }

        .live-list-item .match-summary {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin: 0;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .live-list-item .match-tags {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }

        .live-list-item .match-tag {
            font-size: 12px;
            font-weight: 500;
            color: var(--text-secondary);
            background-color: var(--bg-secondary);
            padding: 3px 10px;
            border-radius: 14px;
            border: 1px solid rgba(200, 255, 0, 0.1);
        }

        .live-list-item .match-score-col {
            display: flex;
            flex-direction: column;
            align-items: flex-end;
            justify-content: center;
            gap: 8px;
        }

        .live-list-item .match-score {
            font-size: 32px;
            font-weight: 800;
            color: var(--accent);
            line-height: 1;
            letter-spacing: 0.02em;
            white-space: nowrap;
        }

        .live-list-item .match-date {
            font-size: 13px;
            color: var(--text-secondary);
            white-space: nowrap;
        }

        .live-list-item .match-status {
            font-size: 12px;
            font-weight: 600;
            color: var(--accent);
            background-color: var(--accent-dim);
            padding: 3px 12px;
            border-radius: 16px;
            border: 1px solid var(--accent-border);
            white-space: nowrap;
        }

        .live-list-item .match-status.ended {
            color: var(--text-secondary);
            background-color: var(--bg-secondary);
            border-color: rgba(200, 255, 0, 0.08);
        }

        /* Data strip */
        .data-strip {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin: 0;
            padding: 0;
        }

        .data-strip .data-item {
            background-color: var(--bg-primary);
            border: var(--border-dark);
            border-radius: var(--radius);
            padding: 24px 20px;
            text-align: center;
            transition: all var(--transition);
        }

        .data-strip .data-item:hover {
            border-color: rgba(200, 255, 0, 0.35);
            box-shadow: var(--shadow-hover);
        }

        .data-strip .data-number {
            font-size: 36px;
            font-weight: 800;
            color: var(--accent);
            line-height: 1;
            margin: 0 0 6px;
        }

        .data-strip .data-label {
            font-size: 14px;
            color: var(--text-secondary);
            font-weight: 500;
            letter-spacing: 0.02em;
        }

        /* CTA section */
        .cta-section {
            background-color: var(--bg-secondary);
            border-top: 1px solid var(--accent-border);
        }

        .cta-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
        }

        .cta-text h3 {
            font-size: 26px;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 8px;
            line-height: 1.3;
        }

        .cta-text p {
            font-size: 15px;
            color: var(--text-secondary);
            margin: 0;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 700;
            padding: 12px 28px;
            border-radius: var(--radius);
            transition: all var(--transition);
            white-space: nowrap;
            letter-spacing: 0.02em;
        }

        .btn-primary {
            background-color: var(--accent);
            color: #14151A;
            border: none;
        }

        .btn-primary:hover {
            background-color: #d4ff33;
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(200, 255, 0, 0.25);
        }

        .btn-primary:active {
            transform: translateY(0);
        }

        .btn-secondary {
            background-color: transparent;
            color: var(--accent);
            border: 1px solid var(--accent);
        }

        .btn-secondary:hover {
            background-color: rgba(200, 255, 0, 0.1);
            transform: translateY(-2px);
        }

        .btn-secondary:active {
            transform: translateY(0);
        }

        /* Footer */
        .site-footer {
            background-color: var(--bg-primary);
            border-top: 1px solid rgba(200, 255, 0, 0.08);
            padding: 48px 0 32px;
        }

        .site-footer .footer-brand {
            font-size: 20px;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .site-footer .footer-brand .logo-crown {
            color: var(--copper);
        }

        .site-footer .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 16px 24px;
            list-style: none;
            padding: 0;
            margin: 0 0 24px;
        }

        .site-footer .footer-links a {
            font-size: 14px;
            color: var(--text-secondary);
            transition: color var(--transition);
        }

        .site-footer .footer-links a:hover {
            color: var(--accent);
        }

        .site-footer .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            gap: 12px 20px;
            font-size: 13px;
            color: var(--text-secondary);
            padding-top: 16px;
            border-top: 1px solid rgba(200, 255, 0, 0.06);
        }

        .site-footer .footer-bottom a {
            color: var(--text-secondary);
            transition: color var(--transition);
        }

        .site-footer .footer-bottom a:hover {
            color: var(--accent);
        }

        /* Sticky bottom CTA */
        .sticky-cta {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            height: var(--sticky-bar-height);
            background-color: rgba(20, 21, 26, 0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-top: 1px solid var(--accent-border);
            z-index: 998;
            display: flex;
            align-items: center;
        }

        .sticky-cta .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }

        .sticky-cta .sticky-text {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            letter-spacing: 0.02em;
            white-space: nowrap;
        }

        .sticky-cta .btn {
            padding: 10px 24px;
            font-size: 14px;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .live-list-item {
                grid-template-columns: 180px 1fr 150px;
                gap: 16px;
                padding: 16px;
            }
            .live-list-item .coverpic-wrapper {
                height: 120px;
            }
            .live-list-item .match-score {
                font-size: 26px;
            }
            .data-strip {
                grid-template-columns: repeat(2, 1fr);
                gap: 14px;
            }
        }

        @media (max-width: 768px) {
            .nav-toggle {
                display: flex;
            }
            .nav-links {
                display: none;
            }
            .category-header {
                padding-top: calc(var(--nav-height) + 28px);
                padding-bottom: 36px;
            }
            .category-header h1 {
                font-size: 28px;
            }
            .category-header .header-desc {
                font-size: 15px;
            }
            .live-list-item {
                grid-template-columns: 1fr;
                gap: 14px;
                padding: 14px;
            }
            .live-list-item .coverpic-wrapper {
                height: 180px;
                order: -1;
            }
            .live-list-item .match-score-col {
                flex-direction: row;
                align-items: center;
                justify-content: space-between;
                width: 100%;
            }
            .live-list-item .match-score {
                font-size: 24px;
            }
            .data-strip {
                grid-template-columns: repeat(2, 1fr);
                gap: 10px;
            }
            .data-strip .data-number {
                font-size: 28px;
            }
            .cta-wrapper {
                flex-direction: column;
                align-items: flex-start;
                text-align: left;
            }
            .cta-text h3 {
                font-size: 22px;
            }
            .section-title {
                font-size: 24px;
            }
            .sticky-cta .sticky-text {
                font-size: 13px;
                white-space: normal;
                line-height: 1.3;
            }
            .sticky-cta .btn {
                padding: 8px 18px;
                font-size: 13px;
                white-space: nowrap;
            }
        }

        @media (max-width: 520px) {
            :root {
                --container-pad-desktop: 16px;
                --container-pad-mobile: 16px;
                --section-y-desktop: 60px;
                --card-gap-desktop: 12px;
                --nav-height: 56px;
                --sticky-bar-height: 52px;
            }
            .category-header h1 {
                font-size: 24px;
            }
            .live-list-item .coverpic-wrapper {
                height: 160px;
            }
            .data-strip {
                grid-template-columns: 1fr 1fr;
                gap: 8px;
            }
            .data-strip .data-number {
                font-size: 24px;
            }
            .data-strip .data-label {
                font-size: 12px;
            }
            .cta-section .btn,
            .sticky-cta .btn {
                width: 100%;
                justify-content: center;
            }
        }

        /* Animation for list items */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .live-list-item {
            animation: fadeInUp 0.5s ease-out both;
        }

        .live-list-item:nth-child(2) {
            animation-delay: 0.08s;
        }
        .live-list-item:nth-child(3) {
            animation-delay: 0.16s;
        }
        .live-list-item:nth-child(4) {
            animation-delay: 0.24s;
        }
        .live-list-item:nth-child(5) {
            animation-delay: 0.32s;
        }
        .live-list-item:nth-child(6) {
            animation-delay: 0.40s;
        }

/* roulang page: category1 */
:root {
            --bg-primary: #14151A;
            --bg-secondary: #2A2D33;
            --bg-light: #F4F6F5;
            --accent: #C8FF00;
            --accent-dim: rgba(200, 255, 0, 0.1);
            --accent-border: rgba(200, 255, 0, 0.15);
            --copper: #B8865A;
            --text-primary: #E4E6E0;
            --text-secondary: #A8ADA5;
            --text-dark: #1E1F24;
            --radius: 8px;
            --radius-sm: 6px;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.25);
            --shadow-hover: 0 12px 40px rgba(200, 255, 0, 0.15);
            --border-dark: 1px solid rgba(200, 255, 0, 0.15);
            --border-light: 1px solid rgba(0, 0, 0, 0.06);
            --font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --container-max: 1280px;
            --container-pad-desktop: 32px;
            --container-pad-mobile: 16px;
            --nav-height: 68px;
            --sticky-bar-height: 64px;
            --section-y-desktop: 100px;
            --section-y-mobile: 68px;
            --card-gap-desktop: 24px;
            --card-gap-mobile: 14px;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-primary);
            background-color: var(--bg-primary);
            padding-bottom: var(--sticky-bar-height);
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: opacity var(--transition), color var(--transition), background-color var(--transition), border-color var(--transition), transform var(--transition);
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            transition: all var(--transition);
        }
        button:focus-visible,
        a:focus-visible,
        input:focus-visible {
            outline: 3px solid rgba(200, 255, 0, 0.6);
            outline-offset: 2px;
        }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: var(--container-pad-desktop);
            padding-right: var(--container-pad-desktop);
            width: 100%;
        }
        .section {
            padding-top: var(--section-y-desktop);
            padding-bottom: var(--section-y-desktop);
        }
        .section-light {
            background-color: var(--bg-light);
            color: var(--text-dark);
        }
        .section-dark {
            background-color: var(--bg-primary);
            color: var(--text-primary);
        }
        .section-muted {
            background-color: var(--bg-secondary);
            color: var(--text-primary);
        }
        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--accent);
            margin-bottom: 14px;
            padding: 4px 12px;
            border: 1px solid var(--accent-border);
            border-radius: 20px;
            background-color: var(--accent-dim);
        }
        .section-light .section-tag {
            color: #5a7a00;
            border-color: rgba(90, 122, 0, 0.2);
            background-color: rgba(200, 255, 0, 0.08);
        }
        .section-title {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.25;
            margin-bottom: 12px;
            color: inherit;
        }
        .section-light .section-title {
            color: var(--text-dark);
        }
        .section-desc {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 640px;
            line-height: 1.75;
            margin-bottom: 28px;
        }
        .section-light .section-desc {
            color: #555a52;
        }

        /* Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--nav-height);
            z-index: 1000;
            background-color: rgba(20, 21, 26, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(200, 255, 0, 0.1);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .nav-logo {
            font-size: 22px;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: 0.02em;
            white-space: nowrap;
            position: relative;
            z-index: 1001;
        }
        .nav-logo .logo-crown {
            color: var(--copper);
            margin-right: 4px;
            font-size: 18px;
            display: inline-block;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
        }
        .nav-links a {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            position: relative;
            padding: 6px 0;
            letter-spacing: 0.02em;
            white-space: nowrap;
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--accent);
            transition: width var(--transition);
        }
        .nav-links a:hover {
            color: var(--text-primary);
            opacity: 0.85;
        }
        .nav-links a:hover::after {
            width: 100%;
        }
        .nav-links a.active {
            color: var(--accent);
        }
        .nav-links a.active::after {
            width: 100%;
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            gap: 5px;
            width: 40px;
            height: 40px;
            z-index: 1001;
            position: relative;
        }
        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background-color: var(--text-primary);
            border-radius: 2px;
            transition: all var(--transition);
        }
        .nav-toggle.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }
        .mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-color: rgba(20, 21, 26, 0.98);
            z-index: 999;
            padding: 100px 24px 40px;
            flex-direction: column;
            gap: 8px;
            overflow-y: auto;
        }
        .mobile-menu.active {
            display: flex;
        }
        .mobile-menu a {
            font-size: 22px;
            font-weight: 600;
            color: var(--text-primary);
            padding: 14px 0;
            border-bottom: 1px solid rgba(200, 255, 0, 0.08);
            letter-spacing: 0.03em;
        }
        .mobile-menu a.active {
            color: var(--accent);
        }
        .mobile-menu a:hover {
            color: var(--accent);
        }

        /* Breadcrumb */
        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13px;
            color: var(--text-secondary);
            margin-bottom: 16px;
        }
        .breadcrumb a {
            color: var(--text-secondary);
            transition: color var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--accent);
        }
        .breadcrumb .separator {
            color: var(--copper);
            font-size: 10px;
            user-select: none;
        }
        .breadcrumb .current {
            color: var(--accent);
            font-weight: 600;
        }

        /* Category Page Header */
        .category-header {
            padding-top: calc(var(--nav-height) + 48px);
            padding-bottom: 48px;
            background-color: var(--bg-primary);
            position: relative;
            overflow: hidden;
        }
        .category-header::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -80px;
            width: 420px;
            height: 420px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(200, 255, 0, 0.06) 0%, transparent 70%);
            pointer-events: none;
        }
        .category-header .container {
            position: relative;
            z-index: 1;
        }
        .category-header h1 {
            font-size: 38px;
            font-weight: 800;
            line-height: 1.2;
            color: var(--text-primary);
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }
        .category-header .header-desc {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 680px;
            line-height: 1.75;
            margin-bottom: 20px;
        }
        .category-header .header-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 18px;
            font-size: 13px;
            color: var(--text-secondary);
        }
        .category-header .header-meta span {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .category-header .header-meta .dot {
            width: 4px;
            height: 4px;
            border-radius: 50%;
            background-color: var(--accent);
            display: inline-block;
        }

        /* Deep Content Layout */
        .deep-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .deep-content.reverse {
            direction: rtl;
        }
        .deep-content.reverse > * {
            direction: ltr;
        }
        .deep-text {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .deep-text h2 {
            font-size: 26px;
            font-weight: 700;
            line-height: 1.3;
            color: inherit;
            margin-bottom: 4px;
        }
        .deep-text p {
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-secondary);
            margin-bottom: 8px;
        }
        .section-light .deep-text p {
            color: #555a52;
        }
        .deep-image {
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            background-color: var(--bg-secondary);
        }
        .deep-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            aspect-ratio: 16 / 10;
            transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .deep-image:hover img {
            transform: scale(1.03);
        }
        .deep-image .image-badge {
            position: absolute;
            top: 16px;
            left: 16px;
            background-color: var(--accent);
            color: var(--text-dark);
            font-size: 12px;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: 20px;
            letter-spacing: 0.05em;
        }
        .deep-tag-row {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 4px;
        }
        .deep-tag {
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 20px;
            background-color: var(--accent-dim);
            color: var(--accent);
            border: 1px solid var(--accent-border);
            letter-spacing: 0.04em;
        }
        .section-light .deep-tag {
            background-color: rgba(200, 255, 0, 0.1);
            color: #5a7a00;
            border-color: rgba(90, 122, 0, 0.15);
        }
        .deep-stats {
            display: flex;
            gap: 28px;
            margin-top: 8px;
            padding-top: 16px;
            border-top: 1px solid rgba(200, 255, 0, 0.1);
        }
        .section-light .deep-stats {
            border-top-color: rgba(0, 0, 0, 0.08);
        }
        .deep-stat-item {
            display: flex;
            flex-direction: column;
        }
        .deep-stat-item .stat-value {
            font-size: 24px;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
        }
        .section-light .deep-stat-item .stat-value {
            color: #5a7a00;
        }
        .deep-stat-item .stat-label {
            font-size: 13px;
            color: var(--text-secondary);
        }
        .section-light .deep-stat-item .stat-label {
            color: #777c74;
        }

        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 700;
            padding: 12px 28px;
            border-radius: var(--radius);
            transition: all var(--transition);
            letter-spacing: 0.03em;
            cursor: pointer;
            white-space: nowrap;
        }
        .btn-primary {
            background-color: var(--accent);
            color: var(--text-dark);
            border: 1px solid var(--accent);
        }
        .btn-primary:hover {
            background-color: #d4ff1a;
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: var(--shadow-card);
        }
        .btn-secondary {
            background-color: transparent;
            color: var(--accent);
            border: 1px solid var(--accent);
        }
        .btn-secondary:hover {
            background-color: var(--accent-dim);
            transform: translateY(-2px);
        }
        .btn-secondary:active {
            transform: translateY(0);
        }
        .section-light .btn-secondary {
            color: #5a7a00;
            border-color: #5a7a00;
        }
        .section-light .btn-secondary:hover {
            background-color: rgba(200, 255, 0, 0.12);
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
            max-width: 800px;
        }
        .faq-item {
            border: 1px solid var(--accent-border);
            border-radius: var(--radius);
            background-color: var(--bg-primary);
            overflow: hidden;
            transition: all var(--transition);
        }
        .section-light .faq-item {
            background-color: #fff;
            border-color: var(--border-light);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 22px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            cursor: pointer;
            width: 100%;
            text-align: left;
            letter-spacing: 0.01em;
        }
        .section-light .faq-question {
            color: var(--text-dark);
        }
        .faq-question .faq-icon {
            font-size: 18px;
            font-weight: 700;
            color: var(--accent);
            flex-shrink: 0;
            transition: transform var(--transition);
            line-height: 1;
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.3s ease;
            padding: 0 22px;
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.75;
        }
        .section-light .faq-answer {
            color: #555a52;
        }
        .faq-item.open {
            border-left: 3px solid var(--accent);
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding-bottom: 20px;
        }

        /* CTA Section */
        .cta-section {
            background-color: var(--bg-primary);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 600px;
            height: 600px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(200, 255, 0, 0.05) 0%, transparent 70%);
            pointer-events: none;
        }
        .cta-box {
            position: relative;
            z-index: 1;
            background-color: var(--bg-secondary);
            border-radius: var(--radius);
            padding: 48px 40px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
            border: 1px solid var(--accent-border);
            box-shadow: var(--shadow-card);
        }
        .cta-box .cta-text {
            flex: 1;
            min-width: 280px;
        }
        .cta-box .cta-text h3 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
            letter-spacing: 0.02em;
        }
        .cta-box .cta-text p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .cta-box .btn {
            flex-shrink: 0;
        }

        /* Footer */
        .site-footer {
            background-color: #0d0e12;
            padding: 48px 0 32px;
            color: var(--text-secondary);
        }
        .footer-brand {
            font-size: 20px;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 24px;
            letter-spacing: 0.02em;
        }
        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 16px 28px;
            list-style: none;
            margin-bottom: 28px;
        }
        .footer-links a {
            font-size: 14px;
            color: var(--text-secondary);
            transition: color var(--transition);
        }
        .footer-links a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            gap: 10px 20px;
            font-size: 13px;
            color: #6a7068;
            padding-top: 20px;
            border-top: 1px solid rgba(200, 255, 0, 0.06);
        }
        .footer-bottom a {
            color: #6a7068;
            transition: color var(--transition);
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }

        /* Sticky Bottom CTA */
        .sticky-cta-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            height: var(--sticky-bar-height);
            background-color: rgba(20, 21, 26, 0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-top: 1px solid var(--accent-border);
            z-index: 900;
            display: flex;
            align-items: center;
        }
        .sticky-cta-bar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }
        .sticky-cta-text {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            letter-spacing: 0.02em;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .sticky-cta-bar .btn {
            padding: 10px 20px;
            font-size: 14px;
            flex-shrink: 0;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            :root {
                --container-pad-desktop: 28px;
                --section-y-desktop: 88px;
            }
            .nav-links {
                gap: 18px;
            }
            .nav-links a {
                font-size: 13px;
            }
            .deep-content {
                gap: 32px;
            }
        }
        @media (max-width: 768px) {
            :root {
                --container-pad-desktop: 20px;
                --section-y-desktop: 72px;
                --card-gap-desktop: 18px;
                --nav-height: 60px;
                --sticky-bar-height: 56px;
            }
            .nav-links {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .category-header {
                padding-top: calc(var(--nav-height) + 32px);
                padding-bottom: 32px;
            }
            .category-header h1 {
                font-size: 28px;
            }
            .section-title {
                font-size: 24px;
            }
            .deep-content {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .deep-content.reverse {
                direction: ltr;
            }
            .deep-text h2 {
                font-size: 22px;
            }
            .cta-box {
                padding: 32px 24px;
                flex-direction: column;
                text-align: center;
            }
            .cta-box .btn {
                width: 100%;
            }
            .sticky-cta-text {
                font-size: 13px;
            }
        }
        @media (max-width: 520px) {
            :root {
                --container-pad-mobile: 16px;
                --section-y-mobile: 60px;
                --card-gap-mobile: 12px;
            }
            .category-header h1 {
                font-size: 24px;
            }
            .section-title {
                font-size: 21px;
            }
            .deep-text h2 {
                font-size: 20px;
            }
            .deep-stats {
                flex-wrap: wrap;
                gap: 16px;
            }
            .footer-links {
                gap: 10px 16px;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 6px;
            }
            .sticky-cta-text {
                font-size: 12px;
                white-space: normal;
                line-height: 1.4;
            }
            .sticky-cta-bar .btn {
                padding: 8px 14px;
                font-size: 13px;
            }
        }

/* roulang page: category5 */
:root {
  --bg-primary: #14151A;
  --bg-secondary: #2A2D33;
  --bg-light: #F4F6F5;
  --accent: #C8FF00;
  --accent-dim: rgba(200, 255, 0, 0.1);
  --accent-border: rgba(200, 255, 0, 0.15);
  --copper: #B8865A;
  --text-primary: #E4E6E0;
  --text-secondary: #A8ADA5;
  --text-dark: #1E1F24;
  --radius: 8px;
  --radius-sm: 6px;
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.25);
  --shadow-hover: 0 12px 40px rgba(200, 255, 0, 0.15);
  --border-dark: 1px solid rgba(200, 255, 0, 0.15);
  --border-light: 1px solid rgba(0, 0, 0, 0.06);
  --font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  --container-max: 1280px;
  --container-pad-desktop: 28px;
  --container-pad-mobile: 16px;
  --nav-height: 64px;
  --footer-height: auto;
  --sticky-bar-height: 60px;
  --section-y-desktop: 88px;
  --section-y-mobile: 60px;
  --card-gap-desktop: 22px;
  --card-gap-mobile: 12px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
body {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  padding-bottom: var(--sticky-bar-height);
  overflow-x: hidden;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
  transition: opacity var(--transition), color var(--transition), background-color var(--transition), border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}
button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  transition: all var(--transition);
}
button:focus-visible,
a:focus-visible,
input:focus-visible {
  outline: 3px solid rgba(200, 255, 0, 0.6);
  outline-offset: 2px;
}
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: var(--container-pad-desktop);
  padding-right: var(--container-pad-desktop);
  width: 100%;
}
.section {
  padding-top: var(--section-y-desktop);
  padding-bottom: var(--section-y-desktop);
}
.section-light {
  background-color: var(--bg-light);
  color: var(--text-dark);
}
.section-dark {
  background-color: var(--bg-primary);
  color: var(--text-primary);
}
.section-muted {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
}
.section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
  padding: 4px 12px;
  border: 1px solid var(--accent-border);
  border-radius: 20px;
  background-color: var(--accent-dim);
}
.section-light .section-tag {
  color: #5a7a00;
  border-color: rgba(90, 122, 0, 0.2);
  background-color: rgba(200, 255, 0, 0.08);
}
.section-title {
  font-size: 30px;
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 12px;
  color: inherit;
}
.section-light .section-title {
  color: var(--text-dark);
}
.section-desc {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 680px;
  line-height: 1.75;
  margin-bottom: 28px;
}
.section-light .section-desc {
  color: #555a52;
}

/* Navigation */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 1000;
  background-color: rgba(20, 21, 26, 0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(200, 255, 0, 0.1);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.nav-logo {
  font-size: 21px;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: 0.02em;
  white-space: nowrap;
  position: relative;
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-logo .logo-crown {
  color: var(--copper);
  font-size: 17px;
  display: inline-block;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  list-style: none;
}
.nav-links a {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 4px 0;
  white-space: nowrap;
  letter-spacing: 0.01em;
}
.nav-links a:hover {
  color: var(--text-primary);
  opacity: 0.85;
}
.nav-links a.active {
  color: var(--accent);
}
.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--accent);
  border-radius: 1px;
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
  cursor: pointer;
  z-index: 1001;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--text-primary);
  border-radius: 1px;
  transition: all var(--transition);
}
.nav-toggle.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle.open span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Page Header */
.page-header {
  padding-top: calc(var(--nav-height) + 48px);
  padding-bottom: 36px;
  background-color: var(--bg-primary);
  border-bottom: 1px solid rgba(200, 255, 0, 0.08);
}
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 18px;
}
.breadcrumb a {
  color: var(--text-secondary);
}
.breadcrumb a:hover {
  color: var(--accent);
}
.breadcrumb .sep {
  color: var(--text-secondary);
  opacity: 0.5;
}
.breadcrumb .current {
  color: var(--accent);
  font-weight: 500;
}
.page-header h1 {
  font-size: 36px;
  font-weight: 800;
  line-height: 1.2;
  color: var(--text-primary);
  margin-bottom: 10px;
}
.page-header .page-subtitle {
  font-size: 17px;
  color: var(--text-secondary);
  max-width: 720px;
  line-height: 1.7;
}

/* Card Matrix */
.card-matrix {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--card-gap-desktop);
}
.expert-card {
  background-color: var(--bg-secondary);
  border: var(--border-dark);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  display: flex;
  flex-direction: column;
}
.expert-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(200, 255, 0, 0.35);
}
.expert-card .card-media {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  position: relative;
  background-color: var(--bg-primary);
}
.expert-card .card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.expert-card:hover .card-media img {
  transform: scale(1.04);
}
.expert-card .card-media .media-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(20, 21, 26, 0.85) 0%, rgba(20, 21, 26, 0.15) 50%, transparent 100%);
  pointer-events: none;
}
.expert-card .card-body {
  padding: 20px 24px 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.expert-card .card-category {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 8px;
  letter-spacing: 0.04em;
}
.expert-card .card-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.4;
  margin-bottom: 8px;
}
.expert-card .card-excerpt {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 14px;
  flex: 1;
}
.expert-card .card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-secondary);
  border-top: 1px solid rgba(200, 255, 0, 0.08);
  padding-top: 12px;
}
.expert-card .card-meta .author {
  display: flex;
  align-items: center;
  gap: 6px;
}
.expert-card .card-meta .author-dot {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background-color: var(--copper);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
  color: #14151A;
}
.expert-card .card-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  cursor: pointer;
  transition: gap var(--transition);
}
.expert-card .card-link:hover {
  gap: 8px;
}

/* Expert Highlight */
.expert-highlight {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.expert-highlight .highlight-content h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 16px;
  line-height: 1.3;
}
.expert-highlight .highlight-content p {
  color: #555a52;
  font-size: 16px;
  line-height: 1.8;
  margin-bottom: 14px;
}
.expert-highlight .highlight-image {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}
.expert-highlight .highlight-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 4 / 3;
}

/* Expert Stats */
.expert-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.stat-block {
  text-align: center;
  padding: 28px 16px;
  background-color: var(--bg-primary);
  border: var(--border-dark);
  border-radius: var(--radius);
  transition: border-color var(--transition), transform var(--transition);
}
.stat-block:hover {
  border-color: rgba(200, 255, 0, 0.4);
  transform: translateY(-2px);
}
.stat-block .stat-number {
  font-size: 40px;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 8px;
  font-feature-settings: 'tnum';
}
.stat-block .stat-label {
  font-size: 14px;
  color: var(--text-secondary);
  font-weight: 500;
}

/* CTA Section */
.cta-section {
  background: linear-gradient(135deg, #1E1F24 0%, #14151A 60%, #1A1B20 100%);
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  top: -60%;
  right: -30%;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  border: 2px solid rgba(200, 255, 0, 0.08);
  pointer-events: none;
}
.cta-section::after {
  content: '';
  position: absolute;
  bottom: -40%;
  left: -20%;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  border: 2px solid rgba(184, 134, 90, 0.1);
  pointer-events: none;
}
.cta-inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}
.cta-text h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}
.cta-text p {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 480px;
}
.cta-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition);
}
.btn-primary {
  background-color: var(--accent);
  color: var(--text-dark);
  border: 1px solid var(--accent);
}
.btn-primary:hover {
  background-color: #d8ff33;
  border-color: #d8ff33;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(200, 255, 0, 0.3);
}
.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(200, 255, 0, 0.2);
}
.btn-secondary {
  background-color: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
}
.btn-secondary:hover {
  background-color: var(--accent-dim);
  transform: translateY(-2px);
}
.btn-secondary:active {
  transform: translateY(0);
}

/* FAQ */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 800px;
}
.faq-item {
  border: 1px solid rgba(200, 255, 0, 0.1);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color var(--transition);
}
.faq-item.open {
  border-color: rgba(200, 255, 0, 0.35);
}
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  font-size: 16px;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  gap: 16px;
  transition: background-color var(--transition);
}
.faq-question:hover {
  background-color: rgba(200, 255, 0, 0.05);
}
.faq-question .faq-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  position: relative;
  transition: transform var(--transition);
}
.faq-question .faq-icon::before,
.faq-question .faq-icon::after {
  content: '';
  position: absolute;
  background-color: var(--accent);
  border-radius: 1px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}
.faq-question .faq-icon::before {
  width: 14px;
  height: 2px;
}
.faq-question .faq-icon::after {
  width: 2px;
  height: 14px;
  transition: opacity var(--transition);
}
.faq-item.open .faq-question .faq-icon::after {
  opacity: 0;
}
.faq-item.open .faq-question .faq-icon {
  transform: rotate(90deg);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
  background-color: var(--bg-primary);
}
.faq-item.open .faq-answer {
  max-height: 300px;
  padding: 16px 20px 20px;
  border-left: 3px solid var(--accent);
}
.faq-answer p {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.75;
}

/* Sticky CTA Bar */
.sticky-cta {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: var(--sticky-bar-height);
  background-color: rgba(20, 21, 26, 0.96);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-top: 1px solid rgba(200, 255, 0, 0.15);
  z-index: 900;
  display: flex;
  align-items: center;
}
.sticky-cta .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.sticky-cta .sticky-text {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.sticky-cta .btn {
  padding: 10px 20px;
  font-size: 14px;
}

/* Footer */
.site-footer {
  background-color: var(--bg-primary);
  border-top: 1px solid rgba(200, 255, 0, 0.08);
  padding: 48px 0 32px;
  margin-bottom: 0;
}
.footer-brand {
  font-size: 20px;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 20px;
}
.footer-brand .logo-crown {
  color: var(--copper);
}
.footer-links {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-bottom: 24px;
  padding: 0;
}
.footer-links a {
  font-size: 14px;
  color: var(--text-secondary);
  transition: color var(--transition);
}
.footer-links a:hover {
  color: var(--accent);
}
.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 20px;
  align-items: center;
  font-size: 13px;
  color: var(--text-secondary);
  border-top: 1px solid rgba(200, 255, 0, 0.06);
  padding-top: 20px;
}
.footer-bottom a {
  color: var(--accent);
}
.footer-bottom a:hover {
  opacity: 0.8;
}

/* Responsive */
@media (max-width: 1024px) {
  .card-matrix {
    grid-template-columns: repeat(2, 1fr);
  }
  .expert-highlight {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .expert-stats {
    grid-template-columns: repeat(2, 1fr);
  }
  .nav-links {
    gap: 16px;
  }
  .nav-links a {
    font-size: 13px;
  }
}
@media (max-width: 768px) {
  :root {
    --nav-height: 60px;
    --sticky-bar-height: 56px;
    --section-y-desktop: 60px;
    --section-y-mobile: 48px;
    --card-gap-desktop: 14px;
  }
  body {
    font-size: 15px;
  }
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }
  .nav-links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background-color: rgba(20, 21, 26, 0.98);
    flex-direction: column;
    align-items: flex-start;
    padding: 32px 28px;
    gap: 24px;
    border-bottom: 1px solid rgba(200, 255, 0, 0.1);
    transform: translateY(-120%);
    opacity: 0;
    transition: transform 0.35s ease, opacity 0.35s ease;
    z-index: 999;
  }
  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
  }
  .nav-links a {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
  }
  .nav-links a.active {
    color: var(--accent);
  }
  .nav-toggle {
    display: flex;
  }
  .page-header h1 {
    font-size: 28px;
  }
  .card-matrix {
    grid-template-columns: 1fr;
  }
  .expert-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
  }
  .stat-block .stat-number {
    font-size: 32px;
  }
  .cta-inner {
    flex-direction: column;
    align-items: flex-start;
  }
  .section-title {
    font-size: 24px;
  }
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
}
@media (max-width: 520px) {
  .expert-stats {
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }
  .stat-block {
    padding: 20px 12px;
  }
  .stat-block .stat-number {
    font-size: 28px;
  }
  .cta-actions {
    flex-direction: column;
    width: 100%;
  }
  .cta-actions .btn {
    width: 100%;
  }
  .sticky-cta .sticky-text {
    font-size: 12px;
  }
  .sticky-cta .btn {
    padding: 8px 16px;
    font-size: 12px;
  }
  .card-matrix {
    gap: 12px;
  }
  .expert-card .card-body {
    padding: 16px 18px 18px;
  }
}

/* roulang page: category6 */
:root {
  --bg-primary: #14151A;
  --bg-secondary: #2A2D33;
  --bg-light: #F4F6F5;
  --accent: #C8FF00;
  --accent-dim: rgba(200, 255, 0, 0.1);
  --accent-border: rgba(200, 255, 0, 0.15);
  --copper: #B8865A;
  --text-primary: #E4E6E0;
  --text-secondary: #A8ADA5;
  --text-dark: #1E1F24;
  --radius: 8px;
  --radius-sm: 6px;
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.25);
  --shadow-hover: 0 12px 40px rgba(200, 255, 0, 0.15);
  --border-dark: 1px solid rgba(200, 255, 0, 0.15);
  --border-light: 1px solid rgba(0, 0, 0, 0.06);
  --font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  --container-max: 1280px;
  --container-pad-desktop: 32px;
  --container-pad-mobile: 16px;
  --nav-height: 68px;
  --footer-height: auto;
  --sticky-bar-height: 64px;
  --section-y-desktop: 100px;
  --section-y-mobile: 68px;
  --card-gap-desktop: 24px;
  --card-gap-mobile: 14px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
@media (max-width: 1440px) {
  :root {
    --container-pad-desktop: 28px;
    --section-y-desktop: 88px;
  }
}
@media (max-width: 1024px) {
  :root {
    --container-pad-desktop: 20px;
    --section-y-desktop: 72px;
    --card-gap-desktop: 18px;
    --nav-height: 64px;
  }
}
@media (max-width: 768px) {
  :root {
    --container-pad-mobile: 16px;
    --section-y-mobile: 60px;
    --card-gap-mobile: 12px;
    --nav-height: 60px;
    --sticky-bar-height: 56px;
  }
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
body {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  padding-bottom: var(--sticky-bar-height);
  overflow-x: hidden;
  margin: 0;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
  transition: opacity var(--transition), color var(--transition), background-color var(--transition), border-color var(--transition), transform var(--transition);
}
button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  transition: all var(--transition);
}
button:focus-visible,
a:focus-visible,
input:focus-visible {
  outline: 3px solid rgba(200, 255, 0, 0.6);
  outline-offset: 2px;
}
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: var(--container-pad-desktop);
  padding-right: var(--container-pad-desktop);
  width: 100%;
}
.section {
  padding-top: var(--section-y-desktop);
  padding-bottom: var(--section-y-desktop);
}
.section-light {
  background-color: var(--bg-light);
  color: var(--text-dark);
}
.section-dark {
  background-color: var(--bg-primary);
  color: var(--text-primary);
}
.section-muted {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
}
.section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
  padding: 4px 12px;
  border: 1px solid var(--accent-border);
  border-radius: 20px;
  background-color: var(--accent-dim);
}
.section-light .section-tag {
  color: #5a7a00;
  border-color: rgba(90, 122, 0, 0.2);
  background-color: rgba(200, 255, 0, 0.08);
}
.section-title {
  font-size: 30px;
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 12px;
  color: inherit;
}
.section-light .section-title {
  color: var(--text-dark);
}
.section-desc {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 640px;
  line-height: 1.75;
  margin-bottom: 28px;
}
.section-light .section-desc {
  color: #555a52;
}

/* Navigation */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 1000;
  background-color: rgba(20, 21, 26, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(200, 255, 0, 0.1);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.nav-logo {
  font-size: 22px;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: 0.02em;
  white-space: nowrap;
  position: relative;
}
.nav-logo .logo-crown {
  color: var(--copper);
  margin-right: 6px;
  font-size: 18px;
  display: inline-block;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 6px 0;
  letter-spacing: 0.01em;
}
.nav-links a:hover {
  color: var(--text-primary);
  opacity: 0.85;
}
.nav-links a.active {
  color: var(--accent);
}
.nav-links a.active::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 2px;
  background-color: var(--accent);
  border-radius: 1px;
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
  z-index: 1001;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--text-primary);
  border-radius: 2px;
  transition: all 0.3s ease;
}
.nav-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
  background-color: var(--accent);
}
.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
  background-color: var(--accent);
}

/* Page Header */
.page-header {
  padding-top: calc(var(--nav-height) + 48px);
  padding-bottom: 40px;
  background-color: var(--bg-primary);
  position: relative;
  border-bottom: 1px solid rgba(200, 255, 0, 0.08);
}
.page-header .container {
  position: relative;
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 18px;
  flex-wrap: wrap;
}
.breadcrumb a {
  color: var(--text-secondary);
  transition: color var(--transition);
}
.breadcrumb a:hover {
  color: var(--accent);
}
.breadcrumb .separator {
  color: var(--copper);
  font-size: 12px;
}
.breadcrumb .current {
  color: var(--accent);
  font-weight: 600;
}
.page-header h1 {
  font-size: 38px;
  font-weight: 800;
  line-height: 1.25;
  color: var(--text-primary);
  margin: 0 0 14px;
  letter-spacing: 0.01em;
}
.page-header .page-header-desc {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 720px;
  line-height: 1.75;
  margin: 0;
}

/* Ranking Matrix Cards */
.ranking-matrix {
  background-color: var(--bg-primary);
}
.ranking-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--card-gap-desktop);
  margin-top: 28px;
}
.ranking-card {
  background-color: var(--bg-secondary);
  border: var(--border-dark);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  display: flex;
  flex-direction: column;
}
.ranking-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(200, 255, 0, 0.35);
}
.ranking-card .card-image {
  width: 100%;
  aspect-ratio: 16/10;
  overflow: hidden;
  position: relative;
  background-color: #1a1c21;
}
.ranking-card .card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.ranking-card:hover .card-image img {
  transform: scale(1.05);
}
.ranking-card .card-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(20,21,26,0) 40%, rgba(20,21,26,0.7) 100%);
  pointer-events: none;
}
.ranking-card .card-rank {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 2;
  font-size: 28px;
  font-weight: 800;
  color: var(--accent);
  background-color: rgba(20, 21, 26, 0.75);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  border: 1px solid var(--accent-border);
  line-height: 1;
}
.ranking-card .card-body {
  padding: 20px 22px 22px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.ranking-card .card-tag {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--copper);
  text-transform: uppercase;
  margin-bottom: 8px;
}
.ranking-card .card-title {
  font-size: 19px;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0 0 8px;
  line-height: 1.35;
}
.ranking-card .card-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.65;
  margin: 0 0 14px;
  flex: 1;
}
.ranking-card .card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.ranking-card .card-meta span {
  display: inline-block;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  background-color: rgba(200, 255, 0, 0.06);
  border: 1px solid var(--accent-border);
  padding: 3px 10px;
  border-radius: 4px;
}
.ranking-card .card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  margin-top: 14px;
  transition: color var(--transition);
}
.ranking-card .card-link:hover {
  color: #e0ff66;
}
.ranking-card .card-link .arrow {
  font-size: 16px;
  transition: transform var(--transition);
}
.ranking-card:hover .card-link .arrow {
  transform: translateX(4px);
}

/* Insight Bar */
.insight-bar {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--accent-border);
  border-bottom: 1px solid var(--accent-border);
}
.insight-bar .insight-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.insight-stat {
  text-align: center;
  padding: 24px 16px;
}
.insight-stat .stat-number {
  font-size: 36px;
  font-weight: 800;
  color: var(--accent);
  line-height: 1.1;
  margin-bottom: 6px;
}
.insight-stat .stat-label {
  font-size: 14px;
  color: var(--text-secondary);
  font-weight: 500;
}

/* Deep Content */
.deep-content {
  background-color: var(--bg-light);
  color: var(--text-dark);
}
.deep-content .deep-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.deep-content .deep-text h2 {
  font-size: 28px;
  font-weight: 700;
  line-height: 1.3;
  margin: 0 0 16px;
  color: var(--text-dark);
}
.deep-content .deep-text p {
  font-size: 16px;
  line-height: 1.8;
  color: #4a4e46;
  margin: 0 0 16px;
}
.deep-content .deep-image {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.18);
}
.deep-content .deep-image img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
}

/* List Flow */
.list-flow {
  background-color: var(--bg-primary);
}
.list-flow .flow-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.list-flow .flow-item {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 18px 0;
  border-bottom: 1px solid rgba(200, 255, 0, 0.1);
}
.list-flow .flow-item:last-child {
  border-bottom: none;
}
.list-flow .flow-number {
  font-size: 26px;
  font-weight: 800;
  color: var(--copper);
  width: 48px;
  flex-shrink: 0;
  text-align: center;
}
.list-flow .flow-thumb {
  width: 72px;
  height: 52px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  flex-shrink: 0;
  background-color: var(--bg-secondary);
}
.list-flow .flow-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.list-flow .flow-info {
  flex: 1;
}
.list-flow .flow-info h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0 0 4px;
}
.list-flow .flow-info p {
  font-size: 14px;
  color: var(--text-secondary);
  margin: 0;
}
.list-flow .flow-trend {
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  white-space: nowrap;
}

/* FAQ */
.faq-section {
  background-color: var(--bg-light);
  color: var(--text-dark);
}
.faq-list {
  max-width: 780px;
  margin: 0 auto;
}
.faq-item {
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
  padding: 0;
}
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 20px 0;
  font-size: 17px;
  font-weight: 600;
  color: var(--text-dark);
  cursor: pointer;
  text-align: left;
  width: 100%;
}
.faq-question .faq-icon {
  font-size: 22px;
  color: var(--copper);
  flex-shrink: 0;
  transition: transform var(--transition);
  line-height: 1;
}
.faq-item.open .faq-question .faq-icon {
  transform: rotate(45deg);
  color: #5a7a00;
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
  padding: 0;
}
.faq-item.open .faq-answer {
  max-height: 500px;
  padding: 0 24px 20px 20px;
}
.faq-answer p {
  font-size: 15px;
  line-height: 1.75;
  color: #555a52;
  margin: 0;
}
.faq-item.open {
  border-left: 3px solid var(--accent);
  padding-left: 16px;
}

/* CTA */
.cta-section {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--accent-border);
}
.cta-card {
  background-color: var(--bg-primary);
  border: var(--border-dark);
  border-radius: var(--radius);
  padding: 48px 40px;
  text-align: center;
  box-shadow: var(--shadow-card);
}
.cta-card h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0 0 12px;
}
.cta-card p {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto 24px;
  line-height: 1.7;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 16px;
  font-weight: 700;
  padding: 14px 32px;
  border-radius: var(--radius);
  font-family: inherit;
  letter-spacing: 0.02em;
}
.btn-primary {
  background-color: var(--accent);
  color: var(--bg-primary);
  border: 1px solid var(--accent);
}
.btn-primary:hover {
  background-color: #d8ff33;
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(200, 255, 0, 0.25);
}
.btn-secondary {
  background-color: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
}
.btn-secondary:hover {
  background-color: var(--accent-dim);
  transform: translateY(-2px);
}
.btn-group {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}
.btn-sm {
  font-size: 14px;
  padding: 10px 20px;
}

/* Sticky Bar */
.sticky-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: var(--sticky-bar-height);
  background-color: rgba(20, 21, 26, 0.96);
  border-top: 1px solid var(--accent-border);
  z-index: 999;
  display: flex;
  align-items: center;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.sticky-bar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.sticky-bar .sticky-text {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.sticky-bar .btn-sm {
  flex-shrink: 0;
}

/* Footer */
.site-footer {
  background-color: var(--bg-primary);
  border-top: 1px solid rgba(200, 255, 0, 0.1);
  padding: 48px 0 32px;
}
.footer-brand {
  font-size: 20px;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 20px;
}
.footer-brand .logo-crown {
  color: var(--copper);
  margin-right: 6px;
}
.footer-links {
  list-style: none;
  padding: 0;
  margin: 0 0 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 18px 28px;
}
.footer-links li a {
  font-size: 14px;
  color: var(--text-secondary);
  transition: color var(--transition);
}
.footer-links li a:hover {
  color: var(--accent);
}
.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  font-size: 13px;
  color: var(--text-secondary);
  align-items: center;
  border-top: 1px solid rgba(200, 255, 0, 0.06);
  padding-top: 20px;
}
.footer-bottom a {
  color: var(--text-secondary);
}
.footer-bottom a:hover {
  color: var(--accent);
}

/* Responsive */
@media (max-width: 1024px) {
  .nav-links {
    display: none;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background-color: rgba(20, 21, 26, 0.98);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 24px 32px;
    border-bottom: 1px solid var(--accent-border);
    z-index: 1000;
  }
  .nav-links.open {
    display: flex;
  }
  .nav-links a {
    font-size: 20px;
    font-weight: 600;
    padding: 14px 0;
    width: 100%;
    border-bottom: 1px solid rgba(200, 255, 0, 0.06);
  }
  .nav-links a:last-child {
    border-bottom: none;
  }
  .nav-links a.active::after {
    display: none;
  }
  .nav-toggle {
    display: flex;
  }
  .ranking-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .insight-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .deep-content .deep-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .page-header h1 {
    font-size: 32px;
  }
}

@media (max-width: 768px) {
  .ranking-grid {
    grid-template-columns: 1fr;
    gap: var(--card-gap-mobile);
  }
  .insight-grid {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }
  .insight-stat .stat-number {
    font-size: 28px;
  }
  .section-title {
    font-size: 24px;
  }
  .page-header h1 {
    font-size: 26px;
  }
  .page-header {
    padding-top: calc(var(--nav-height) + 32px);
    padding-bottom: 28px;
  }
  .cta-card {
    padding: 32px 20px;
  }
  .cta-card h2 {
    font-size: 22px;
  }
  .sticky-bar .sticky-text {
    font-size: 13px;
  }
  .list-flow .flow-item {
    gap: 12px;
    padding: 14px 0;
  }
  .list-flow .flow-number {
    width: 32px;
    font-size: 20px;
  }
  .list-flow .flow-thumb {
    width: 52px;
    height: 40px;
  }
  .deep-content .deep-text h2 {
    font-size: 22px;
  }
}

/* roulang page: category7 */
:root {
            --bg-primary: #14151A;
            --bg-secondary: #2A2D33;
            --bg-light: #F4F6F5;
            --accent: #C8FF00;
            --accent-dim: rgba(200, 255, 0, 0.1);
            --accent-border: rgba(200, 255, 0, 0.15);
            --copper: #B8865A;
            --text-primary: #E4E6E0;
            --text-secondary: #A8ADA5;
            --text-dark: #1E1F24;
            --radius: 8px;
            --radius-sm: 6px;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.25);
            --shadow-hover: 0 12px 40px rgba(200, 255, 0, 0.15);
            --border-dark: 1px solid rgba(200, 255, 0, 0.15);
            --border-light: 1px solid rgba(0, 0, 0, 0.06);
            --font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --container-max: 1280px;
            --container-pad-desktop: 28px;
            --container-pad-mobile: 16px;
            --nav-height: 68px;
            --footer-height: auto;
            --sticky-bar-height: 64px;
            --section-y-desktop: 88px;
            --section-y-mobile: 60px;
            --card-gap-desktop: 22px;
            --card-gap-mobile: 12px;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-primary);
            background-color: var(--bg-primary);
            min-height: 100vh;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition), background-color var(--transition), opacity var(--transition), transform var(--transition), box-shadow var(--transition);
        }

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            transition: all var(--transition);
        }

        button:focus-visible,
        a:focus-visible {
            outline: 3px solid rgba(200, 255, 0, 0.6);
            outline-offset: 2px;
        }

        ul,
        ol {
            list-style: none;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 var(--container-pad-desktop);
        }

        /* Header */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            height: var(--nav-height);
            background: rgba(20, 21, 26, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(200, 255, 0, 0.08);
            display: flex;
            align-items: center;
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }

        .nav-logo {
            font-size: 22px;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: 0.5px;
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }

        .nav-logo:hover {
            color: var(--accent);
            opacity: 0.9;
        }

        .logo-crown {
            color: var(--copper);
            font-size: 24px;
            font-weight: 700;
            display: inline-flex;
            align-items: center;
            line-height: 1;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .nav-links a {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 8px 14px;
            border-radius: var(--radius-sm);
            letter-spacing: 0.3px;
            white-space: nowrap;
            position: relative;
        }

        .nav-links a:hover {
            color: var(--text-primary);
            opacity: 0.8;
        }

        .nav-links a.active {
            color: var(--accent);
        }

        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 14px;
            right: 14px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 10px;
            border-radius: var(--radius-sm);
        }

        .nav-toggle span {
            width: 24px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: all var(--transition);
        }

        .nav-toggle:hover span {
            background: var(--accent);
        }

        .nav-toggle[aria-expanded="true"] span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .nav-toggle[aria-expanded="true"] span:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle[aria-expanded="true"] span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* Mobile nav overlay */
        .mobile-nav-overlay {
            display: none;
            position: fixed;
            inset: 0;
            top: var(--nav-height);
            z-index: 99;
            background: rgba(20, 21, 26, 0.98);
            padding: 32px 24px;
            flex-direction: column;
            gap: 4px;
            overflow-y: auto;
        }

        .mobile-nav-overlay.is-open {
            display: flex;
        }

        .mobile-nav-overlay a {
            font-size: 22px;
            font-weight: 600;
            color: var(--text-primary);
            padding: 14px 0;
            border-bottom: 1px solid rgba(200, 255, 0, 0.08);
            letter-spacing: 0.5px;
        }

        .mobile-nav-overlay a:hover,
        .mobile-nav-overlay a.active {
            color: var(--accent);
        }

        /* Page header breadcrumb area */
        .page-header {
            padding-top: calc(var(--nav-height) + 56px);
            padding-bottom: 36px;
            background: var(--bg-primary);
            position: relative;
            overflow: hidden;
        }

        .page-header::before {
            content: '';
            position: absolute;
            top: 0;
            right: -120px;
            width: 400px;
            height: 400px;
            border: 1px solid rgba(200, 255, 0, 0.08);
            border-radius: 50%;
            pointer-events: none;
        }

        .page-header::after {
            content: '';
            position: absolute;
            bottom: -80px;
            left: -60px;
            width: 260px;
            height: 260px;
            border: 1px solid rgba(184, 134, 90, 0.15);
            border-radius: 50%;
            pointer-events: none;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-secondary);
            margin-bottom: 20px;
            position: relative;
            z-index: 1;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--text-secondary);
        }

        .breadcrumb a:hover {
            color: var(--accent);
        }

        .breadcrumb .separator {
            color: var(--copper);
            font-weight: 700;
        }

        .breadcrumb .current {
            color: var(--accent);
            font-weight: 600;
        }

        .page-header-content {
            position: relative;
            z-index: 1;
        }

        .page-header-content h1 {
            font-size: 36px;
            font-weight: 700;
            line-height: 1.2;
            color: var(--text-primary);
            margin-bottom: 14px;
            letter-spacing: 0.5px;
        }

        .page-header-content .subtitle {
            font-size: 17px;
            color: var(--text-secondary);
            line-height: 1.75;
            max-width: 680px;
        }

        /* Community stats strip */
        .community-stats {
            background: var(--bg-secondary);
            padding: 28px 0;
            border-bottom: 1px solid var(--accent-border);
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--card-gap-desktop);
        }

        .stat-item {
            text-align: center;
            padding: 12px 8px;
        }

        .stat-number {
            font-size: 38px;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
            letter-spacing: 0.5px;
        }

        .stat-label {
            font-size: 14px;
            color: var(--text-secondary);
            margin-top: 6px;
            letter-spacing: 0.5px;
        }

        /* Section base */
        .section {
            padding: var(--section-y-desktop) 0;
        }

        .section-alt {
            background: var(--bg-secondary);
        }

        .section-light {
            background: var(--bg-light);
            color: var(--text-dark);
        }

        .section-title {
            font-size: 28px;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 10px;
            letter-spacing: 0.3px;
            color: inherit;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.75;
            max-width: 620px;
            margin-bottom: 36px;
        }

        .section-light .section-subtitle {
            color: #5a5d55;
        }

        /* Ranking list */
        .ranking-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .ranking-item {
            display: flex;
            align-items: center;
            gap: 16px;
            background: var(--bg-secondary);
            border: 1px solid var(--accent-border);
            border-radius: var(--radius);
            padding: 16px 20px;
            transition: all var(--transition);
        }

        .ranking-item:hover {
            border-color: rgba(200, 255, 0, 0.4);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        .rank-badge {
            flex-shrink: 0;
            width: 42px;
            height: 42px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 18px;
            background: rgba(200, 255, 0, 0.08);
            color: var(--text-secondary);
            border: 1px solid var(--accent-border);
        }

        .rank-badge.top-1 {
            background: var(--copper);
            color: #fff;
            border-color: var(--copper);
        }

        .rank-badge.top-2 {
            background: #3d4148;
            color: #fff;
            border-color: #4a4e55;
        }

        .rank-badge.top-3 {
            background: #4a3520;
            color: #e0b88a;
            border-color: rgba(184, 134, 90, 0.4);
        }

        .rank-info {
            flex: 1;
            min-width: 0;
        }

        .rank-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.4;
            margin-bottom: 3px;
        }

        .rank-meta {
            font-size: 13px;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
        }

        .rank-score {
            flex-shrink: 0;
            font-size: 22px;
            font-weight: 700;
            color: var(--accent);
            letter-spacing: 0.3px;
        }

        /* Data table */
        .data-table-wrap {
            overflow-x: auto;
            border-radius: var(--radius);
            border: 1px solid var(--accent-border);
            background: var(--bg-secondary);
            box-shadow: var(--shadow-card);
        }

        .data-table {
            width: 100%;
            border-collapse: collapse;
            min-width: 620px;
            font-size: 15px;
        }

        .data-table th {
            background: rgba(200, 255, 0, 0.06);
            color: var(--accent);
            font-weight: 600;
            text-align: left;
            padding: 14px 18px;
            font-size: 13px;
            letter-spacing: 0.5px;
            text-transform: uppercase;
            border-bottom: 1px solid var(--accent-border);
            white-space: nowrap;
        }

        .data-table td {
            padding: 14px 18px;
            color: var(--text-primary);
            border-bottom: 1px solid rgba(200, 255, 0, 0.06);
            vertical-align: middle;
        }

        .data-table tr:last-child td {
            border-bottom: none;
        }

        .data-table tr:hover td {
            background: rgba(200, 255, 0, 0.03);
        }

        .data-table .highlight-cell {
            color: var(--accent);
            font-weight: 700;
        }

        .level-badge {
            display: inline-block;
            padding: 3px 10px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.3px;
        }

        .level-badge.lv-1 {
            background: rgba(200, 255, 0, 0.12);
            color: var(--accent);
            border: 1px solid rgba(200, 255, 0, 0.3);
        }

        .level-badge.lv-2 {
            background: rgba(184, 134, 90, 0.15);
            color: #d4a574;
            border: 1px solid rgba(184, 134, 90, 0.3);
        }

        .level-badge.lv-3 {
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-secondary);
            border: 1px solid rgba(255, 255, 255, 0.12);
        }

        /* Two column layout */
        .two-col-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--card-gap-desktop);
            align-items: start;
        }

        /* Topic cards */
        .topic-card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--card-gap-desktop);
        }

        .topic-card {
            background: var(--bg-secondary);
            border: 1px solid var(--accent-border);
            border-radius: var(--radius);
            padding: 20px;
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .topic-card:hover {
            border-color: rgba(200, 255, 0, 0.4);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        .topic-card .topic-rank {
            font-size: 13px;
            font-weight: 700;
            color: var(--copper);
            letter-spacing: 1px;
            text-transform: uppercase;
        }

        .topic-card h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.4;
        }

        .topic-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            flex: 1;
        }

        .topic-card .topic-count {
            font-size: 13px;
            color: var(--accent);
            font-weight: 600;
        }

        /* Community image feature */
        .community-feature {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 36px;
            align-items: center;
        }

        .community-feature-image {
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--accent-border);
            position: relative;
        }

        .community-feature-image img {
            width: 100%;
            height: 320px;
            object-fit: cover;
        }

        .community-feature-image::after {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(20, 21, 26, 0.15);
            pointer-events: none;
        }

        .community-feature-text h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 14px;
            line-height: 1.3;
        }

        .community-feature-text p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 14px;
        }

        /* CTA section */
        .cta-section {
            padding: var(--section-y-desktop) 0;
            background: var(--bg-primary);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 600px;
            height: 600px;
            border: 1px solid rgba(200, 255, 0, 0.06);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-inner {
            background: var(--bg-secondary);
            border: 1px solid var(--accent-border);
            border-radius: var(--radius);
            padding: 48px 40px;
            text-align: center;
            position: relative;
            z-index: 1;
            box-shadow: var(--shadow-card);
        }

        .cta-inner h2 {
            font-size: 30px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
            line-height: 1.3;
        }

        .cta-inner p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.75;
            max-width: 560px;
            margin: 0 auto 28px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 32px;
            font-size: 16px;
            font-weight: 700;
            border-radius: var(--radius);
            letter-spacing: 0.5px;
            transition: all var(--transition);
            cursor: pointer;
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--accent);
            color: var(--text-dark);
        }

        .btn-primary:hover {
            background: #d4ff3d;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(200, 255, 0, 0.25);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(200, 255, 0, 0.2);
        }

        .btn-secondary {
            background: transparent;
            color: var(--accent);
            border: 1px solid var(--accent);
        }

        .btn-secondary:hover {
            background: var(--accent-dim);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(200, 255, 0, 0.1);
        }

        .btn-secondary:active {
            transform: translateY(0);
        }

        .btn-group {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* Footer */
        .site-footer {
            background: #0e0f14;
            border-top: 1px solid rgba(200, 255, 0, 0.08);
            padding: 48px 0 32px;
            color: var(--text-secondary);
        }

        .footer-brand {
            font-size: 20px;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 20px;
            letter-spacing: 0.5px;
        }

        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 8px 24px;
            margin-bottom: 28px;
        }

        .footer-links a {
            font-size: 14px;
            color: var(--text-secondary);
            transition: color var(--transition);
        }

        .footer-links a:hover {
            color: var(--accent);
        }

        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            gap: 8px 20px;
            align-items: center;
            font-size: 13px;
            color: var(--text-secondary);
            border-top: 1px solid rgba(200, 255, 0, 0.06);
            padding-top: 20px;
        }

        .footer-bottom a {
            color: var(--text-secondary);
            text-decoration: underline;
            text-underline-offset: 3px;
        }

        .footer-bottom a:hover {
            color: var(--accent);
        }

        /* Sticky CTA bar */
        .sticky-cta-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 90;
            height: var(--sticky-bar-height);
            background: rgba(20, 21, 26, 0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-top: 1px solid var(--accent-border);
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            padding: 0 16px;
        }

        .sticky-cta-bar .sticky-text {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            letter-spacing: 0.3px;
        }

        .sticky-cta-bar .btn {
            padding: 10px 24px;
            font-size: 14px;
        }

        body.has-sticky-bar {
            padding-bottom: var(--sticky-bar-height);
        }

        /* Responsive breakpoints */
        @media (max-width: 1024px) {
            :root {
                --container-pad-desktop: 20px;
                --section-y-desktop: 72px;
                --card-gap-desktop: 18px;
                --nav-height: 64px;
            }

            .page-header-content h1 {
                font-size: 30px;
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }

            .topic-card-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .community-feature {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .two-col-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --container-pad-mobile: 16px;
                --section-y-mobile: 60px;
                --card-gap-mobile: 12px;
                --nav-height: 60px;
                --sticky-bar-height: 56px;
            }

            .site-header .container {
                padding: 0 16px;
            }

            .nav-links {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .page-header {
                padding-top: calc(var(--nav-height) + 36px);
                padding-bottom: 24px;
            }

            .page-header-content h1 {
                font-size: 26px;
            }

            .page-header-content .subtitle {
                font-size: 15px;
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 8px;
            }

            .stat-number {
                font-size: 28px;
            }

            .topic-card-grid {
                grid-template-columns: 1fr;
                gap: var(--card-gap-mobile);
            }

            .ranking-item {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
                padding: 14px 16px;
            }

            .rank-badge {
                width: 34px;
                height: 34px;
                font-size: 15px;
            }

            .rank-score {
                font-size: 18px;
            }

            .section {
                padding: var(--section-y-mobile) 0;
            }

            .section-title {
                font-size: 22px;
            }

            .cta-inner {
                padding: 32px 20px;
            }

            .cta-inner h2 {
                font-size: 24px;
            }

            .sticky-cta-bar .sticky-text {
                font-size: 13px;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
            }

            .community-feature-image img {
                height: 220px;
            }
        }

        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 6px;
            }

            .stat-number {
                font-size: 24px;
            }

            .stat-label {
                font-size: 12px;
            }

            .btn-group {
                flex-direction: column;
                gap: 10px;
            }

            .btn {
                width: 100%;
                padding: 12px 20px;
                font-size: 15px;
            }

            .sticky-cta-bar {
                gap: 10px;
            }
        }

/* roulang page: category4 */
:root {
            --bg-primary: #14151A;
            --bg-secondary: #2A2D33;
            --bg-light: #F4F6F5;
            --accent: #C8FF00;
            --accent-dim: rgba(200, 255, 0, 0.1);
            --accent-border: rgba(200, 255, 0, 0.15);
            --copper: #B8865A;
            --text-primary: #E4E6E0;
            --text-secondary: #A8ADA5;
            --text-dark: #1E1F24;
            --radius: 8px;
            --radius-sm: 6px;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.25);
            --shadow-hover: 0 12px 40px rgba(200, 255, 0, 0.15);
            --border-dark: 1px solid rgba(200, 255, 0, 0.15);
            --border-light: 1px solid rgba(0, 0, 0, 0.06);
            --font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --container-max: 1280px;
            --container-pad-desktop: 32px;
            --container-pad-mobile: 16px;
            --nav-height: 68px;
            --footer-height: auto;
            --sticky-bar-height: 64px;
            --section-y-desktop: 100px;
            --section-y-mobile: 68px;
            --card-gap-desktop: 24px;
            --card-gap-mobile: 14px;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-primary);
            background-color: var(--bg-primary);
            padding-bottom: var(--sticky-bar-height);
            overflow-x: hidden;
            margin: 0;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: opacity var(--transition), color var(--transition), background-color var(--transition), border-color var(--transition), transform var(--transition);
        }

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            transition: all var(--transition);
        }

        button:focus-visible,
        a:focus-visible,
        input:focus-visible {
            outline: 3px solid rgba(200, 255, 0, 0.6);
            outline-offset: 2px;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: var(--container-pad-desktop);
            padding-right: var(--container-pad-desktop);
            width: 100%;
            box-sizing: border-box;
        }

        .section {
            padding-top: var(--section-y-desktop);
            padding-bottom: var(--section-y-desktop);
        }

        .section-light {
            background-color: var(--bg-light);
            color: var(--text-dark);
        }

        .section-dark {
            background-color: var(--bg-primary);
            color: var(--text-primary);
        }

        .section-muted {
            background-color: var(--bg-secondary);
            color: var(--text-primary);
        }

        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--accent);
            margin-bottom: 14px;
            padding: 4px 12px;
            border: 1px solid var(--accent-border);
            border-radius: 20px;
            background-color: var(--accent-dim);
        }

        .section-light .section-tag {
            color: #5a7a00;
            border-color: rgba(90, 122, 0, 0.2);
            background-color: rgba(200, 255, 0, 0.08);
        }

        .section-title {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.25;
            margin-bottom: 12px;
            color: inherit;
        }

        .section-light .section-title {
            color: var(--text-dark);
        }

        .section-desc {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 640px;
            line-height: 1.75;
            margin-bottom: 28px;
        }

        .section-light .section-desc {
            color: #555a52;
        }

        /* Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--nav-height);
            z-index: 1000;
            background-color: rgba(20, 21, 26, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(200, 255, 0, 0.1);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }

        .nav-logo {
            font-size: 22px;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: 0.02em;
            white-space: nowrap;
            position: relative;
            display: flex;
            align-items: center;
        }

        .nav-logo .logo-crown {
            color: var(--copper);
            margin-right: 6px;
            font-size: 20px;
            display: inline-block;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 22px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-links a {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            position: relative;
            padding: 4px 0;
            letter-spacing: 0.02em;
            transition: color var(--transition);
        }

        .nav-links a:hover {
            color: var(--text-primary);
            opacity: 0.85;
        }

        .nav-links a.active {
            color: var(--accent);
        }

        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100%;
            height: 2px;
            background-color: var(--accent);
            border-radius: 2px;
        }

        .nav-links a:not(.active)::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 50%;
            width: 0;
            height: 2px;
            background-color: var(--accent);
            border-radius: 2px;
            transition: all var(--transition);
            transform: translateX(-50%);
        }

        .nav-links a:not(.active):hover::after {
            width: 100%;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 32px;
            height: 32px;
            background: none;
            border: none;
            padding: 0;
        }

        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background-color: var(--text-primary);
            border-radius: 2px;
            transition: all var(--transition);
        }

        .nav-toggle[aria-expanded="true"] span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .nav-toggle[aria-expanded="true"] span:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle[aria-expanded="true"] span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* Mobile nav overlay */
        .mobile-nav-overlay {
            display: none;
            position: fixed;
            top: var(--nav-height);
            left: 0;
            right: 0;
            bottom: 0;
            background-color: rgba(20, 21, 26, 0.98);
            z-index: 999;
            padding: 24px 16px;
            flex-direction: column;
            gap: 8px;
        }

        .mobile-nav-overlay.open {
            display: flex;
        }

        .mobile-nav-overlay a {
            font-size: 20px;
            font-weight: 600;
            color: var(--text-primary);
            padding: 14px 0;
            border-bottom: 1px solid rgba(200, 255, 0, 0.08);
            text-align: left;
            letter-spacing: 0.03em;
        }

        .mobile-nav-overlay a.active {
            color: var(--accent);
            border-left: 3px solid var(--accent);
            padding-left: 12px;
        }

        /* Breadcrumb + category header */
        .category-header {
            padding-top: calc(var(--nav-height) + 48px);
            padding-bottom: 40px;
            background-color: var(--bg-primary);
            border-bottom: 1px solid var(--accent-border);
            position: relative;
            overflow: hidden;
        }

        .category-header::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(200, 255, 0, 0.06) 0%, transparent 70%);
            pointer-events: none;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-secondary);
            margin-bottom: 24px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--text-secondary);
            transition: color var(--transition);
        }

        .breadcrumb a:hover {
            color: var(--accent);
        }

        .breadcrumb .separator {
            color: var(--copper);
            font-size: 12px;
        }

        .breadcrumb .current {
            color: var(--accent);
            font-weight: 600;
        }

        .category-header h1 {
            font-size: 38px;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 14px;
            color: var(--text-primary);
            letter-spacing: 0.01em;
        }

        .category-header .category-desc {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 680px;
            line-height: 1.75;
        }

        /* Video list stream */
        .video-list-section {
            background-color: var(--bg-primary);
        }

        .video-list {
            display: flex;
            flex-direction: column;
            gap: var(--card-gap-desktop);
        }

        .video-item {
            display: flex;
            gap: 24px;
            background-color: var(--bg-secondary);
            border: var(--border-dark);
            border-radius: var(--radius);
            overflow: hidden;
            padding: 20px;
            box-shadow: var(--shadow-card);
            transition: all var(--transition);
            position: relative;
        }

        .video-item:hover {
            border-color: rgba(200, 255, 0, 0.35);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        .video-item .video-thumb {
            flex-shrink: 0;
            width: 260px;
            height: 160px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            position: relative;
            background-color: #1a1b20;
        }

        .video-item .video-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition);
        }

        .video-item:hover .video-thumb img {
            transform: scale(1.05);
        }

        .video-item .video-thumb::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 40%;
            background: linear-gradient(to top, rgba(20, 21, 26, 0.7), transparent);
            pointer-events: none;
        }

        .video-item .play-indicator {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background-color: rgba(200, 255, 0, 0.9);
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 2;
            pointer-events: none;
        }

        .video-item .play-indicator::before {
            content: '';
            width: 0;
            height: 0;
            border-left: 14px solid #14151A;
            border-top: 9px solid transparent;
            border-bottom: 9px solid transparent;
            margin-left: 3px;
        }

        .video-item .video-content {
            flex: 1;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            min-width: 0;
        }

        .video-item .video-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
            margin-bottom: 8px;
        }

        .video-item .video-date {
            font-size: 13px;
            color: var(--text-secondary);
            letter-spacing: 0.03em;
        }

        .video-item .video-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: var(--accent);
            padding: 2px 10px;
            border: 1px solid var(--accent-border);
            border-radius: 12px;
            background-color: var(--accent-dim);
            letter-spacing: 0.04em;
        }

        .video-item .video-title {
            font-size: 19px;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.4;
            margin-bottom: 8px;
            letter-spacing: 0.01em;
        }

        .video-item .video-title a:hover {
            color: var(--accent);
        }

        .video-item .video-excerpt {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 12px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .video-item .video-action {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .video-item .btn-watch {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 700;
            color: #14151A;
            background-color: var(--accent);
            padding: 6px 16px;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            letter-spacing: 0.03em;
        }

        .video-item .btn-watch:hover {
            background-color: #d9ff2e;
            transform: translateY(-1px);
        }

        .video-item .video-duration {
            font-size: 12px;
            color: var(--text-secondary);
        }

        /* Category features strip */
        .category-features {
            background-color: var(--bg-secondary);
            padding: 40px 0;
            border-top: 1px solid var(--accent-border);
            border-bottom: 1px solid var(--accent-border);
        }

        .features-strip {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
        }

        .feature-item {
            display: flex;
            align-items: center;
            gap: 12px;
            flex: 1;
            min-width: 180px;
        }

        .feature-icon {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background-color: var(--accent-dim);
            border: 1px solid var(--accent-border);
            color: var(--accent);
            font-weight: 800;
            font-size: 16px;
            flex-shrink: 0;
        }

        .feature-text {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-primary);
            line-height: 1.4;
        }

        .feature-text small {
            display: block;
            font-size: 12px;
            color: var(--text-secondary);
            font-weight: 400;
        }

        /* CTA section */
        .cta-section {
            background-color: var(--bg-primary);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            bottom: 0;
            right: 0;
            width: 500px;
            height: 300px;
            background: radial-gradient(ellipse, rgba(200, 255, 0, 0.05) 0%, transparent 70%);
            pointer-events: none;
        }

        .cta-box {
            background-color: var(--bg-secondary);
            border: var(--border-dark);
            border-radius: var(--radius);
            padding: 48px 40px;
            text-align: center;
            box-shadow: var(--shadow-card);
            position: relative;
            z-index: 1;
        }

        .cta-box h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
        }

        .cta-box p {
            font-size: 15px;
            color: var(--text-secondary);
            max-width: 520px;
            margin: 0 auto 24px;
            line-height: 1.7;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 700;
            color: #14151A;
            background-color: var(--accent);
            padding: 12px 28px;
            border-radius: var(--radius);
            letter-spacing: 0.03em;
            transition: all var(--transition);
        }

        .btn-primary:hover {
            background-color: #d9ff2e;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(200, 255, 0, 0.2);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 600;
            color: var(--accent);
            background-color: transparent;
            padding: 11px 26px;
            border-radius: var(--radius);
            border: 1px solid var(--accent);
            letter-spacing: 0.03em;
            transition: all var(--transition);
        }

        .btn-secondary:hover {
            background-color: var(--accent-dim);
            transform: translateY(-2px);
        }

        .cta-actions {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 14px;
            flex-wrap: wrap;
        }

        /* Sticky bottom CTA bar */
        .sticky-cta-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            height: var(--sticky-bar-height);
            background-color: rgba(20, 21, 26, 0.96);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border-top: 1px solid rgba(200, 255, 0, 0.15);
            z-index: 990;
            display: flex;
            align-items: center;
        }

        .sticky-cta-bar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }

        .sticky-text {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            letter-spacing: 0.02em;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .sticky-text span {
            color: var(--accent);
        }

        .btn-sticky {
            display: inline-flex;
            align-items: center;
            font-size: 14px;
            font-weight: 700;
            color: #14151A;
            background-color: var(--accent);
            padding: 9px 22px;
            border-radius: var(--radius-sm);
            white-space: nowrap;
            letter-spacing: 0.03em;
            transition: all var(--transition);
        }

        .btn-sticky:hover {
            background-color: #d9ff2e;
            transform: translateY(-1px);
        }

        /* Footer */
        .site-footer {
            background-color: #0e0f12;
            color: var(--text-secondary);
            padding: 48px 0 36px;
            border-top: 1px solid rgba(200, 255, 0, 0.08);
        }
        .site-footer .container {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }
        .footer-brand {
            font-size: 20px;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: 0.02em;
        }
        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 14px 24px;
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links a {
            color: var(--text-secondary);
            font-size: 13px;
            transition: color var(--transition);
        }
        .footer-links a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 10px 18px;
            font-size: 12px;
            color: var(--text-secondary);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 16px;
        }
        .footer-bottom a {
            color: var(--text-secondary);
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            :root {
                --container-pad-desktop: 24px;
                --section-y-desktop: 80px;
            }
            .nav-links {
                gap: 16px;
            }
            .video-item {
                flex-direction: column;
                gap: 16px;
            }
            .video-item .video-thumb {
                width: 100%;
                height: 220px;
            }
        }
        @media (max-width: 768px) {
            :root {
                --container-pad-desktop: 16px;
                --section-y-desktop: 60px;
                --card-gap-desktop: 14px;
                --nav-height: 60px;
                --sticky-bar-height: 56px;
            }
            .nav-links {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .mobile-nav-overlay.open {
                display: flex;
            }
            .category-header {
                padding-top: calc(var(--nav-height) + 32px);
                padding-bottom: 32px;
            }
            .category-header h1 {
                font-size: 28px;
            }
            .section-title {
                font-size: 24px;
            }
            .video-item {
                padding: 16px;
            }
            .video-item .video-thumb {
                height: 180px;
            }
            .video-item .video-title {
                font-size: 17px;
            }
            .cta-box {
                padding: 32px 20px;
            }
            .cta-box h2 {
                font-size: 22px;
            }
            .sticky-text {
                font-size: 12px;
                white-space: normal;
                line-height: 1.3;
            }
            .btn-sticky {
                font-size: 12px;
                padding: 8px 16px;
            }
        }
        @media (max-width: 520px) {
            .video-item .video-thumb {
                height: 150px;
            }
            .video-item .video-title {
                font-size: 15px;
            }
            .features-strip {
                flex-direction: column;
                align-items: flex-start;
                gap: 16px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
            .cta-actions {
                flex-direction: column;
                gap: 12px;
            }
            .cta-actions .btn-primary,
            .cta-actions .btn-secondary {
                width: 100%;
                justify-content: center;
            }
        }

/* roulang page: category7 */
:root {
            --bg-primary: #14151A;
            --bg-secondary: #2A2D33;
            --bg-light: #F4F6F5;
            --accent: #C8FF00;
            --accent-dim: rgba(200, 255, 0, 0.1);
            --accent-border: rgba(200, 255, 0, 0.15);
            --copper: #B8865A;
            --text-primary: #E4E6E0;
            --text-secondary: #A8ADA5;
            --text-dark: #1E1F24;
            --radius: 8px;
            --radius-sm: 6px;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.25);
            --shadow-hover: 0 12px 40px rgba(200, 255, 0, 0.15);
            --border-dark: 1px solid rgba(200, 255, 0, 0.15);
            --border-light: 1px solid rgba(0, 0, 0, 0.06);
            --font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --container-max: 1280px;
            --container-pad-desktop: 28px;
            --container-pad-mobile: 16px;
            --nav-height: 64px;
            --sticky-bar-height: 60px;
            --section-y-desktop: 88px;
            --section-y-mobile: 60px;
            --card-gap-desktop: 22px;
            --card-gap-mobile: 12px;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-family);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.7;
            font-size: 16px;
            min-height: 100vh;
            padding-top: var(--nav-height);
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition), opacity var(--transition), background var(--transition);
        }

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            outline: none;
            background: none;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: var(--container-pad-desktop);
            padding-right: var(--container-pad-desktop);
        }

        /* ========== Header ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--nav-height);
            background: rgba(20, 21, 26, 0.94);
            border-bottom: 1px solid rgba(200, 255, 0, 0.08);
            z-index: 1000;
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 20px;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: 1px;
            white-space: nowrap;
            transition: color var(--transition);
        }

        .nav-logo:hover,
        .nav-logo:focus-visible {
            color: var(--accent);
            outline: none;
        }

        .logo-crown {
            color: var(--copper);
            font-size: 24px;
            line-height: 1;
            display: inline-block;
            transform: translateY(-1px);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 22px;
        }

        .nav-links a {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 4px 0;
            position: relative;
            white-space: nowrap;
            letter-spacing: 0.5px;
            transition: color var(--transition), opacity var(--transition);
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent);
            border-radius: 1px;
            transition: width var(--transition);
        }

        .nav-links a:hover {
            color: var(--text-primary);
            opacity: 0.85;
        }

        .nav-links a:hover::after {
            width: 100%;
        }

        .nav-links a.active {
            color: var(--accent);
            font-weight: 600;
        }

        .nav-links a.active::after {
            width: 100%;
        }

        .nav-links a:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 4px;
            border-radius: 2px;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 6px;
            background: none;
            border: none;
            cursor: pointer;
            z-index: 1101;
        }

        .nav-toggle span {
            display: block;
            width: 26px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 1px;
            transition: transform var(--transition), opacity var(--transition), background var(--transition);
        }

        .nav-toggle:hover span {
            background: var(--accent);
        }

        .nav-toggle:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
            border-radius: 4px;
        }

        .nav-toggle[aria-expanded="true"] span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-toggle[aria-expanded="true"] span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle[aria-expanded="true"] span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* ========== Breadcrumb ========== */
        .breadcrumb-wrap {
            padding: 22px 0 0;
            background: var(--bg-primary);
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 6px;
            font-size: 13px;
            color: var(--text-secondary);
            letter-spacing: 0.3px;
        }

        .breadcrumb a {
            color: var(--text-secondary);
            transition: color var(--transition);
        }

        .breadcrumb a:hover {
            color: var(--accent);
        }

        .breadcrumb a:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
            border-radius: 2px;
        }

        .breadcrumb .sep {
            color: var(--copper);
            font-weight: 600;
            user-select: none;
        }

        .breadcrumb .current {
            color: var(--accent);
            font-weight: 500;
        }

        /* ========== Category Page Header ========== */
        .category-page-header {
            padding: 44px 0 36px;
            background: var(--bg-primary);
            border-bottom: 1px solid var(--accent-border);
            position: relative;
            overflow: hidden;
        }

        .category-page-header::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -40px;
            width: 280px;
            height: 280px;
            border: 2px solid rgba(184, 134, 90, 0.2);
            border-radius: 50%;
            pointer-events: none;
        }

        .category-page-header .container {
            display: grid;
            grid-template-columns: 1fr 360px;
            gap: 40px;
            align-items: center;
            position: relative;
            z-index: 1;
        }

        .category-header-info h1 {
            font-size: 38px;
            font-weight: 800;
            line-height: 1.2;
            color: var(--text-primary);
            letter-spacing: 1px;
            margin-bottom: 14px;
        }

        .category-header-info .subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 560px;
        }

        .category-header-visual {
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--accent-border);
            position: relative;
            aspect-ratio: 16 / 9;
            background: var(--bg-secondary);
        }

        .category-header-visual img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition);
        }

        .category-header-visual:hover img {
            transform: scale(1.03);
        }

        /* ========== Section Base ========== */
        .section {
            padding: var(--section-y-desktop) 0;
        }

        .section-dark {
            background: var(--bg-primary);
        }

        .section-secondary {
            background: var(--bg-secondary);
        }

        .section-light {
            background: var(--bg-light);
            color: var(--text-dark);
        }

        .section-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent);
            letter-spacing: 2px;
            text-transform: uppercase;
            margin-bottom: 10px;
            border-left: 3px solid var(--copper);
            padding-left: 10px;
        }

        .section-dark .section-label,
        .section-secondary .section-label {
            color: var(--accent);
        }

        .section-light .section-label {
            color: #5a7a00;
            border-left-color: var(--copper);
        }

        .section-title {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.25;
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }

        .section-desc {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 720px;
            margin-bottom: 32px;
        }

        .section-light .section-desc {
            color: #4a4d52;
        }

        .section-light .section-title {
            color: var(--text-dark);
        }

        /* ========== Ranking List ========== */
        .ranking-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            list-style: none;
        }

        .ranking-item {
            display: grid;
            grid-template-columns: 52px 1fr auto;
            gap: 16px;
            align-items: center;
            background: var(--bg-secondary);
            border: 1px solid var(--accent-border);
            border-radius: var(--radius);
            padding: 16px 20px;
            transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
        }

        .ranking-item:hover {
            border-color: rgba(200, 255, 0, 0.4);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        .ranking-item:focus-within {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        .rank-number {
            font-size: 22px;
            font-weight: 800;
            color: var(--text-secondary);
            text-align: center;
            line-height: 1;
            letter-spacing: -0.5px;
        }

        .ranking-item:nth-child(1) .rank-number {
            color: var(--accent);
            font-size: 26px;
        }
        .ranking-item:nth-child(2) .rank-number {
            color: var(--copper);
            font-size: 24px;
        }
        .ranking-item:nth-child(3) .rank-number {
            color: #cd7f32;
            font-size: 23px;
        }

        .ranking-content h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 4px;
            line-height: 1.35;
        }

        .ranking-content p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.55;
        }

        .ranking-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 13px;
            color: var(--text-secondary);
            white-space: nowrap;
        }

        .ranking-meta .heat {
            color: var(--accent);
            font-weight: 700;
            font-size: 16px;
        }

        .ranking-meta .badge {
            background: var(--accent-dim);
            color: var(--accent);
            border-radius: 20px;
            padding: 3px 12px;
            font-size: 12px;
            font-weight: 600;
        }

        /* ========== Stats Data Table ========== */
        .data-table-wrap {
            overflow-x: auto;
            border-radius: var(--radius);
            border: 1px solid var(--accent-border);
            background: var(--bg-secondary);
            -webkit-overflow-scrolling: touch;
        }

        .data-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 14px;
            min-width: 680px;
        }

        .data-table th {
            text-align: left;
            padding: 14px 18px;
            font-weight: 600;
            font-size: 13px;
            color: var(--accent);
            letter-spacing: 1px;
            text-transform: uppercase;
            background: rgba(20, 21, 26, 0.6);
            border-bottom: 1px solid var(--accent-border);
            white-space: nowrap;
        }

        .data-table td {
            padding: 13px 18px;
            color: var(--text-primary);
            border-bottom: 1px solid rgba(200, 255, 0, 0.06);
            font-size: 14px;
            line-height: 1.5;
        }

        .data-table tbody tr {
            transition: background var(--transition);
        }

        .data-table tbody tr:hover {
            background: rgba(200, 255, 0, 0.04);
        }

        .data-table tbody tr:last-child td {
            border-bottom: none;
        }

        .data-table .rank-badge {
            display: inline-block;
            width: 28px;
            height: 28px;
            line-height: 28px;
            text-align: center;
            background: var(--accent-dim);
            color: var(--accent);
            border-radius: 50%;
            font-weight: 700;
            font-size: 13px;
        }

        .data-table .trend-up {
            color: var(--accent);
            font-weight: 600;
        }

        .data-table .trend-down {
            color: var(--copper);
            font-weight: 600;
        }

        .data-table .trend-flat {
            color: var(--text-secondary);
            font-weight: 500;
        }

        /* ========== Stats Cards ========== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--card-gap-desktop);
            margin-bottom: 32px;
        }

        .stat-card {
            background: var(--bg-secondary);
            border: 1px solid var(--accent-border);
            border-radius: var(--radius);
            padding: 24px 20px;
            text-align: left;
            transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
        }

        .stat-card:hover {
            border-color: rgba(200, 255, 0, 0.35);
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }

        .stat-number {
            font-size: 36px;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.1;
            letter-spacing: -1px;
            margin-bottom: 6px;
        }

        .stat-number .unit {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-secondary);
            margin-left: 2px;
        }

        .stat-label {
            font-size: 14px;
            color: var(--text-secondary);
            font-weight: 500;
            letter-spacing: 0.5px;
        }

        /* ========== CTA Section ========== */
        .cta-section {
            padding: 64px 0;
            background: var(--bg-secondary);
            border-top: 1px solid var(--accent-border);
            border-bottom: 1px solid var(--accent-border);
            position: relative;
            overflow: hidden;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -60px;
            right: -60px;
            width: 200px;
            height: 200px;
            border: 2px solid rgba(184, 134, 90, 0.15);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-inner {
            display: grid;
            grid-template-columns: 1fr auto;
            gap: 32px;
            align-items: center;
            position: relative;
            z-index: 1;
        }

        .cta-inner h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
            line-height: 1.3;
        }

        .cta-inner p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 700;
            border-radius: var(--radius);
            padding: 14px 30px;
            letter-spacing: 0.5px;
            transition: all var(--transition);
            white-space: nowrap;
            text-align: center;
        }

        .btn-primary {
            background: var(--accent);
            color: #14151A;
            box-shadow: 0 4px 16px rgba(200, 255, 0, 0.25);
        }

        .btn-primary:hover {
            background: #d7ff3d;
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(200, 255, 0, 0.35);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 10px rgba(200, 255, 0, 0.2);
        }

        .btn-primary:focus-visible {
            outline: 3px solid rgba(200, 255, 0, 0.6);
            outline-offset: 2px;
        }

        .btn-secondary {
            background: transparent;
            border: 1px solid var(--accent);
            color: var(--accent);
        }

        .btn-secondary:hover {
            background: var(--accent-dim);
            transform: translateY(-2px);
            border-color: rgba(200, 255, 0, 0.6);
        }

        .btn-secondary:active {
            transform: translateY(0);
        }

        .btn-secondary:focus-visible {
            outline: 3px solid rgba(200, 255, 0, 0.5);
            outline-offset: 2px;
        }

        .btn-sm {
            padding: 8px 18px;
            font-size: 13px;
            border-radius: var(--radius-sm);
        }

        /* ========== Sticky CTA Bar ========== */
        .sticky-cta-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            height: var(--sticky-bar-height);
            background: rgba(20, 21, 26, 0.96);
            border-top: 1px solid var(--accent-border);
            z-index: 999;
            display: flex;
            align-items: center;
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
        }

        .sticky-cta-bar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }

        .sticky-cta-text {
            font-size: 14px;
            color: var(--text-primary);
            font-weight: 500;
            letter-spacing: 0.3px;
        }

        .sticky-cta-text .highlight {
            color: var(--accent);
            font-weight: 700;
        }

        .sticky-cta-bar .btn {
            padding: 10px 24px;
            font-size: 14px;
            flex-shrink: 0;
        }

        body.has-sticky-bar {
            padding-bottom: var(--sticky-bar-height);
        }

        /* ========== Footer ========== */
        .site-footer {
            background: var(--bg-primary);
            border-top: 1px solid rgba(200, 255, 0, 0.08);
            padding: 48px 0 36px;
            margin-bottom: var(--sticky-bar-height);
        }

        .footer-brand {
            font-size: 20px;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: 1px;
            margin-bottom: 20px;
        }

        .footer-links {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 10px 24px;
            margin-bottom: 24px;
        }

        .footer-links a {
            font-size: 14px;
            color: var(--text-secondary);
            transition: color var(--transition);
        }

        .footer-links a:hover {
            color: var(--accent);
        }

        .footer-links a:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
            border-radius: 2px;
        }

        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            gap: 8px 20px;
            font-size: 12px;
            color: var(--text-secondary);
            border-top: 1px solid rgba(200, 255, 0, 0.06);
            padding-top: 20px;
            letter-spacing: 0.3px;
        }

        .footer-bottom a {
            color: var(--text-secondary);
            transition: color var(--transition);
        }

        .footer-bottom a:hover {
            color: var(--accent);
        }

        /* ========== Mobile Nav Overlay ========== */
        .mobile-nav-overlay {
            position: fixed;
            inset: 0;
            background: rgba(20, 21, 26, 0.98);
            z-index: 1100;
            display: none;
            align-items: flex-start;
            justify-content: flex-start;
            padding: calc(var(--nav-height) + 30px) 28px 40px;
            flex-direction: column;
            gap: 6px;
        }

        .mobile-nav-overlay.open {
            display: flex;
        }

        .mobile-nav-overlay a {
            font-size: 22px;
            font-weight: 600;
            color: var(--text-primary);
            padding: 12px 0;
            letter-spacing: 1px;
            border-bottom: 1px solid rgba(200, 255, 0, 0.08);
            width: 100%;
            transition: color var(--transition), padding-left var(--transition);
        }

        .mobile-nav-overlay a:hover {
            color: var(--accent);
            padding-left: 8px;
        }

        .mobile-nav-overlay a.active {
            color: var(--accent);
            border-bottom-color: var(--accent);
        }

        .mobile-nav-overlay a:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
            border-radius: 4px;
        }

        .mobile-nav-close {
            position: absolute;
            top: calc(var(--nav-height) - 20px);
            right: 20px;
            width: 44px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            color: var(--text-primary);
            cursor: pointer;
            border: 1px solid var(--accent-border);
            border-radius: 50%;
            transition: color var(--transition), border-color var(--transition);
        }

        .mobile-nav-close:hover {
            color: var(--accent);
            border-color: var(--accent);
        }

        /* ========== Responsive ========== */
        @media (max-width: 1024px) {
            .nav-links {
                gap: 14px;
            }

            .nav-links a {
                font-size: 13px;
            }

            .category-page-header .container {
                grid-template-columns: 1fr 280px;
                gap: 28px;
            }

            .category-header-info h1 {
                font-size: 32px;
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }

            .section-title {
                font-size: 26px;
            }

            .cta-inner {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --nav-height: 60px;
                --sticky-bar-height: 56px;
                --section-y-desktop: 60px;
                --section-y-mobile: 48px;
                --card-gap-desktop: 14px;
                --container-pad-desktop: 16px;
            }

            .container {
                padding-left: var(--container-pad-mobile);
                padding-right: var(--container-pad-mobile);
            }

            .nav-links {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .category-page-header {
                padding: 30px 0 26px;
            }

            .category-page-header .container {
                grid-template-columns: 1fr;
                gap: 22px;
            }

            .category-header-info h1 {
                font-size: 28px;
            }

            .category-header-info .subtitle {
                font-size: 15px;
            }

            .category-header-visual {
                aspect-ratio: 16 / 9;
            }

            .section {
                padding: var(--section-y-mobile) 0;
            }

            .section-title {
                font-size: 22px;
            }

            .section-desc {
                font-size: 15px;
                margin-bottom: 22px;
            }

            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }

            .stat-number {
                font-size: 28px;
            }

            .ranking-item {
                grid-template-columns: 40px 1fr;
                gap: 12px;
                padding: 14px 14px;
            }

            .ranking-content h3 {
                font-size: 15px;
            }

            .ranking-meta {
                grid-column: 1 / -1;
                padding-left: 52px;
                gap: 10px;
                flex-wrap: wrap;
            }

            .data-table th,
            .data-table td {
                padding: 10px 12px;
                font-size: 13px;
            }

            .cta-section {
                padding: 44px 0;
            }

            .cta-inner h2 {
                font-size: 22px;
            }

            .btn {
                padding: 12px 22px;
                font-size: 14px;
            }

            .sticky-cta-text {
                font-size: 12px;
            }

            .sticky-cta-bar .btn {
                padding: 8px 16px;
                font-size: 12px;
            }

            .footer-links {
                gap: 8px 16px;
            }

            .footer-bottom {
                flex-direction: column;
                gap: 6px;
                font-size: 11px;
            }
        }

        @media (max-width: 520px) {
            :root {
                --nav-height: 56px;
                --sticky-bar-height: 52px;
                --section-y-mobile: 40px;
                --card-gap-mobile: 10px;
            }

            .category-page-header .container {
                gap: 18px;
            }

            .category-header-info h1 {
                font-size: 24px;
            }

            .stats-grid {
                grid-template-columns: 1fr;
                gap: 10px;
            }

            .stat-card {
                padding: 18px 16px;
            }

            .stat-number {
                font-size: 26px;
            }

            .ranking-item {
                grid-template-columns: 32px 1fr;
                gap: 10px;
                padding: 12px 10px;
            }

            .rank-number {
                font-size: 18px;
            }
            .ranking-item:nth-child(1) .rank-number { font-size: 22px; }
            .ranking-item:nth-child(2) .rank-number { font-size: 20px; }
            .ranking-item:nth-child(3) .rank-number { font-size: 19px; }

            .ranking-content h3 {
                font-size: 14px;
            }

            .ranking-meta {
                padding-left: 42px;
                font-size: 12px;
                gap: 8px;
            }

            .breadcrumb {
                font-size: 12px;
            }

            .cta-inner h2 {
                font-size: 20px;
            }

            .btn {
                padding: 10px 18px;
                font-size: 13px;
            }

            .sticky-cta-text {
                font-size: 11px;
                letter-spacing: 0;
            }

            .sticky-cta-bar .btn {
                padding: 8px 14px;
                font-size: 12px;
            }

            .site-footer {
                padding: 32px 0 24px;
            }

            .footer-brand {
                font-size: 18px;
            }
        }

/* roulang page: category4 */
:root {
            --bg-primary: #14151A;
            --bg-secondary: #2A2D33;
            --bg-light: #F4F6F5;
            --accent: #C8FF00;
            --accent-dim: rgba(200, 255, 0, 0.1);
            --accent-border: rgba(200, 255, 0, 0.15);
            --copper: #B8865A;
            --text-primary: #E4E6E0;
            --text-secondary: #A8ADA5;
            --text-dark: #1E1F24;
            --radius: 8px;
            --radius-sm: 6px;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.25);
            --shadow-hover: 0 12px 40px rgba(200, 255, 0, 0.15);
            --border-dark: 1px solid rgba(200, 255, 0, 0.15);
            --border-light: 1px solid rgba(0, 0, 0, 0.06);
            --font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --container-max: 1280px;
            --container-pad-desktop: 32px;
            --container-pad-mobile: 16px;
            --nav-height: 68px;
            --footer-height: auto;
            --sticky-bar-height: 64px;
            --section-y-desktop: 100px;
            --section-y-mobile: 68px;
            --card-gap-desktop: 24px;
            --card-gap-mobile: 14px;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-primary);
            background-color: var(--bg-primary);
            padding-bottom: var(--sticky-bar-height);
            overflow-x: hidden;
            margin: 0;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: opacity var(--transition), color var(--transition), background-color var(--transition), border-color var(--transition), transform var(--transition);
        }

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            transition: all var(--transition);
        }

        button:focus-visible,
        a:focus-visible,
        input:focus-visible {
            outline: 3px solid rgba(200, 255, 0, 0.6);
            outline-offset: 2px;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: var(--container-pad-desktop);
            padding-right: var(--container-pad-desktop);
            width: 100%;
            box-sizing: border-box;
        }

        .section {
            padding-top: var(--section-y-desktop);
            padding-bottom: var(--section-y-desktop);
        }

        .section-light {
            background-color: var(--bg-light);
            color: var(--text-dark);
        }

        .section-dark {
            background-color: var(--bg-primary);
            color: var(--text-primary);
        }

        .section-muted {
            background-color: var(--bg-secondary);
            color: var(--text-primary);
        }

        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--accent);
            margin-bottom: 14px;
            padding: 4px 12px;
            border: 1px solid var(--accent-border);
            border-radius: 20px;
            background-color: var(--accent-dim);
        }

        .section-light .section-tag {
            color: #5a7a00;
            border-color: rgba(90, 122, 0, 0.2);
            background-color: rgba(200, 255, 0, 0.08);
        }

        .section-title {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.25;
            margin-bottom: 12px;
            color: inherit;
        }

        .section-light .section-title {
            color: var(--text-dark);
        }

        .section-desc {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 640px;
            line-height: 1.75;
            margin-bottom: 28px;
        }

        .section-light .section-desc {
            color: #555a52;
        }

        /* Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--nav-height);
            z-index: 1000;
            background-color: rgba(20, 21, 26, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(200, 255, 0, 0.1);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }

        .nav-logo {
            font-size: 22px;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: 0.02em;
            white-space: nowrap;
            position: relative;
            display: flex;
            align-items: center;
        }

        .nav-logo .logo-crown {
            color: var(--copper);
            margin-right: 6px;
            font-size: 20px;
            display: inline-block;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 22px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-links a {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            position: relative;
            padding: 4px 0;
            letter-spacing: 0.02em;
            transition: color var(--transition);
        }

        .nav-links a:hover {
            color: var(--text-primary);
            opacity: 0.85;
        }

        .nav-links a.active {
            color: var(--accent);
        }

        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100%;
            height: 2px;
            background-color: var(--accent);
            border-radius: 2px;
        }

        .nav-links a:not(.active)::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 50%;
            width: 0;
            height: 2px;
            background-color: var(--accent);
            border-radius: 2px;
            transition: all var(--transition);
            transform: translateX(-50%);
        }

        .nav-links a:not(.active):hover::after {
            width: 100%;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 32px;
            height: 32px;
            background: none;
            border: none;
            padding: 0;
        }

        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background-color: var(--text-primary);
            border-radius: 2px;
            transition: all var(--transition);
        }

        .nav-toggle[aria-expanded="true"] span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .nav-toggle[aria-expanded="true"] span:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle[aria-expanded="true"] span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* Mobile nav overlay */
        .mobile-nav-overlay {
            display: none;
            position: fixed;
            top: var(--nav-height);
            left: 0;
            right: 0;
            bottom: 0;
            background-color: rgba(20, 21, 26, 0.98);
            z-index: 999;
            padding: 24px 16px;
            flex-direction: column;
            gap: 8px;
        }

        .mobile-nav-overlay.open {
            display: flex;
        }

        .mobile-nav-overlay a {
            font-size: 20px;
            font-weight: 600;
            color: var(--text-primary);
            padding: 14px 0;
            border-bottom: 1px solid rgba(200, 255, 0, 0.08);
            text-align: left;
            letter-spacing: 0.03em;
        }

        .mobile-nav-overlay a.active {
            color: var(--accent);
            border-left: 3px solid var(--accent);
            padding-left: 12px;
        }

        /* Breadcrumb + category header */
        .category-header {
            padding-top: calc(var(--nav-height) + 48px);
            padding-bottom: 40px;
            background-color: var(--bg-primary);
            border-bottom: 1px solid var(--accent-border);
            position: relative;
            overflow: hidden;
        }

        .category-header::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(200, 255, 0, 0.06) 0%, transparent 70%);
            pointer-events: none;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-secondary);
            margin-bottom: 24px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--text-secondary);
            transition: color var(--transition);
        }

        .breadcrumb a:hover {
            color: var(--accent);
        }

        .breadcrumb .separator {
            color: var(--copper);
            font-size: 12px;
        }

        .breadcrumb .current {
            color: var(--accent);
            font-weight: 600;
        }

        .category-header h1 {
            font-size: 38px;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 14px;
            color: var(--text-primary);
            letter-spacing: 0.01em;
        }

        .category-header .category-desc {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 680px;
            line-height: 1.75;
        }

        /* Video list stream */
        .video-list-section {
            background-color: var(--bg-primary);
        }

        .video-list {
            display: flex;
            flex-direction: column;
            gap: var(--card-gap-desktop);
        }

        .video-item {
            display: flex;
            gap: 24px;
            background-color: var(--bg-secondary);
            border: var(--border-dark);
            border-radius: var(--radius);
            overflow: hidden;
            padding: 20px;
            box-shadow: var(--shadow-card);
            transition: all var(--transition);
            position: relative;
        }

        .video-item:hover {
            border-color: rgba(200, 255, 0, 0.35);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        .video-item .video-thumb {
            flex-shrink: 0;
            width: 260px;
            height: 160px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            position: relative;
            background-color: #1a1b20;
        }

        .video-item .video-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition);
        }

        .video-item:hover .video-thumb img {
            transform: scale(1.05);
        }

        .video-item .video-thumb::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 40%;
            background: linear-gradient(to top, rgba(20, 21, 26, 0.7), transparent);
            pointer-events: none;
        }

        .video-item .play-indicator {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background-color: rgba(200, 255, 0, 0.9);
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 2;
            pointer-events: none;
        }

        .video-item .play-indicator::before {
            content: '';
            width: 0;
            height: 0;
            border-left: 14px solid #14151A;
            border-top: 9px solid transparent;
            border-bottom: 9px solid transparent;
            margin-left: 3px;
        }

        .video-item .video-content {
            flex: 1;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            min-width: 0;
        }

        .video-item .video-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
            margin-bottom: 8px;
        }

        .video-item .video-date {
            font-size: 13px;
            color: var(--text-secondary);
            letter-spacing: 0.03em;
        }

        .video-item .video-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: var(--accent);
            padding: 2px 10px;
            border: 1px solid var(--accent-border);
            border-radius: 12px;
            background-color: var(--accent-dim);
            letter-spacing: 0.04em;
        }

        .video-item .video-title {
            font-size: 19px;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.4;
            margin-bottom: 8px;
            letter-spacing: 0.01em;
        }

        .video-item .video-title a:hover {
            color: var(--accent);
        }

        .video-item .video-excerpt {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 12px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .video-item .video-action {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .video-item .btn-watch {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 700;
            color: #14151A;
            background-color: var(--accent);
            padding: 6px 16px;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            letter-spacing: 0.03em;
        }

        .video-item .btn-watch:hover {
            background-color: #d9ff2e;
            transform: translateY(-1px);
        }

        .video-item .video-duration {
            font-size: 12px;
            color: var(--text-secondary);
        }

        /* Category features strip */
        .category-features {
            background-color: var(--bg-secondary);
            padding: 40px 0;
            border-top: 1px solid var(--accent-border);
            border-bottom: 1px solid var(--accent-border);
        }

        .features-strip {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
        }

        .feature-item {
            display: flex;
            align-items: center;
            gap: 12px;
            flex: 1;
            min-width: 180px;
        }

        .feature-icon {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background-color: var(--accent-dim);
            border: 1px solid var(--accent-border);
            color: var(--accent);
            font-weight: 800;
            font-size: 16px;
            flex-shrink: 0;
        }

        .feature-text {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-primary);
            line-height: 1.4;
        }

        .feature-text small {
            display: block;
            font-size: 12px;
            color: var(--text-secondary);
            font-weight: 400;
        }

        /* CTA section */
        .cta-section {
            background-color: var(--bg-primary);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            bottom: 0;
            right: 0;
            width: 500px;
            height: 300px;
            background: radial-gradient(ellipse, rgba(200, 255, 0, 0.05) 0%, transparent 70%);
            pointer-events: none;
        }

        .cta-box {
            background-color: var(--bg-secondary);
            border: var(--border-dark);
            border-radius: var(--radius);
            padding: 48px 40px;
            text-align: center;
            box-shadow: var(--shadow-card);
            position: relative;
            z-index: 1;
        }

        .cta-box h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
        }

        .cta-box p {
            font-size: 15px;
            color: var(--text-secondary);
            max-width: 520px;
            margin: 0 auto 24px;
            line-height: 1.7;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 700;
            color: #14151A;
            background-color: var(--accent);
            padding: 12px 28px;
            border-radius: var(--radius);
            letter-spacing: 0.03em;
            transition: all var(--transition);
        }

        .btn-primary:hover {
            background-color: #d9ff2e;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(200, 255, 0, 0.2);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 600;
            color: var(--accent);
            background-color: transparent;
            padding: 11px 26px;
            border-radius: var(--radius);
            border: 1px solid var(--accent);
            letter-spacing: 0.03em;
            transition: all var(--transition);
        }

        .btn-secondary:hover {
            background-color: var(--accent-dim);
            transform: translateY(-2px);
        }

        .cta-actions {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 14px;
            flex-wrap: wrap;
        }

        /* Sticky bottom CTA bar */
        .sticky-cta-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            height: var(--sticky-bar-height);
            background-color: rgba(20, 21, 26, 0.96);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border-top: 1px solid rgba(200, 255, 0, 0.15);
            z-index: 990;
            display: flex;
            align-items: center;
        }

        .sticky-cta-bar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }

        .sticky-text {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            letter-spacing: 0.02em;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .sticky-text span {
            color: var(--accent);
        }

        .btn-sticky {
            display: inline-flex;
            align-items: center;
            font-size: 14px;
            font-weight: 700;
            color: #14151A;
            background-color: var(--accent);
            padding: 9px 22px;
            border-radius: var(--radius-sm);
            white-space: nowrap;
            letter-spacing: 0.03em;
            transition: all var(--transition);
        }

        .btn-sticky:hover {
            background-color: #d9ff2e;
            transform: translateY(-1px);
        }

        /* Footer */
        .site-footer {
            background-color: #0e0f12;
            color: var(--text-secondary);
            padding: 48px 0 36px;
            border-top: 1px solid rgba(200, 255, 0, 0.08);
        }
        .site-footer .container {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }
        .footer-brand {
            font-size: 20px;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: 0.02em;
        }
        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 14px 24px;
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links a {
            color: var(--text-secondary);
            font-size: 13px;
            transition: color var(--transition);
        }
        .footer-links a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 10px 18px;
            font-size: 12px;
            color: var(--text-secondary);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 16px;
        }
        .footer-bottom a {
            color: var(--text-secondary);
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            :root {
                --container-pad-desktop: 24px;
                --section-y-desktop: 80px;
            }
            .nav-links {
                gap: 16px;
            }
            .video-item {
                flex-direction: column;
                gap: 16px;
            }
            .video-item .video-thumb {
                width: 100%;
                height: 220px;
            }
        }
        @media (max-width: 768px) {
            :root {
                --container-pad-desktop: 16px;
                --section-y-desktop: 60px;
                --card-gap-desktop: 14px;
                --nav-height: 60px;
                --sticky-bar-height: 56px;
            }
            .nav-links {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .mobile-nav-overlay.open {
                display: flex;
            }
            .category-header {
                padding-top: calc(var(--nav-height) + 32px);
                padding-bottom: 32px;
            }
            .category-header h1 {
                font-size: 28px;
            }
            .section-title {
                font-size: 24px;
            }
            .video-item {
                padding: 16px;
            }
            .video-item .video-thumb {
                height: 180px;
            }
            .video-item .video-title {
                font-size: 17px;
            }
            .cta-box {
                padding: 32px 20px;
            }
            .cta-box h2 {
                font-size: 22px;
            }
            .sticky-text {
                font-size: 12px;
                white-space: normal;
                line-height: 1.3;
            }
            .btn-sticky {
                font-size: 12px;
                padding: 8px 16px;
            }
        }
        @media (max-width: 520px) {
            .video-item .video-thumb {
                height: 150px;
            }
            .video-item .video-title {
                font-size: 15px;
            }
            .features-strip {
                flex-direction: column;
                align-items: flex-start;
                gap: 16px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
            .cta-actions {
                flex-direction: column;
                gap: 12px;
            }
            .cta-actions .btn-primary,
            .cta-actions .btn-secondary {
                width: 100%;
                justify-content: center;
            }
        }