/* roulang page: index */
:root {
            --bg-dark: #0d1218;
            --bg-panel: #121a24;
            --bg-card: #16202b;
            --bg-input: #0f1822;
            --text-primary: #e6edf3;
            --text-secondary: #8fa3b5;
            --text-muted: #5e7387;
            --highlight: #2de2a6;
            --highlight-soft: rgba(45, 226, 166, 0.12);
            --highlight-border: rgba(45, 226, 166, 0.22);
            --purple-muted: #6d5b8f;
            --purple-soft: rgba(109, 91, 143, 0.15);
            --radius: 8px;
            --radius-sm: 6px;
            --radius-lg: 10px;
            --shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 12px 32px rgba(0, 0, 0, 0.45);
            --transition: 0.22s ease;
            --font-stack: system-ui, -apple-system, 'Segoe UI', '苹方', '微软雅黑', 'PingFang SC', 'Hiragino Sans GB', 'Source Han Sans SC', sans-serif;
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 24px;
            --spacing-lg: 40px;
            --spacing-xl: 56px;
            --spacing-xxl: 72px;
        }

        * {
            box-sizing: border-box;
        }

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

        body {
            font-family: var(--font-stack);
            background-color: var(--bg-dark);
            color: var(--text-primary);
            font-size: 15px;
            line-height: 1.7;
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: var(--highlight);
            text-decoration: none;
            transition: color var(--transition);
        }

        a:hover {
            color: #5ff0bc;
        }

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

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

        button,
        input,
        textarea,
        select {
            font-family: var(--font-stack);
            font-size: 15px;
        }

        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--highlight);
            outline-offset: 2px;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        .section {
            padding: var(--spacing-xl) 0;
        }

        .section--compact {
            padding: var(--spacing-lg) 0;
        }

        .section--dark-alt {
            background-color: var(--bg-panel);
        }

        .section--darker {
            background-color: #0a0e13;
        }

        .section-title {
            font-size: 26px;
            font-weight: 700;
            line-height: 1.35;
            margin-bottom: 12px;
            color: var(--text-primary);
            letter-spacing: 0.5px;
        }

        .section-subtitle {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.75;
            max-width: 680px;
            margin-bottom: var(--spacing-md);
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 1.2px;
            color: var(--highlight);
            background: var(--highlight-soft);
            padding: 6px 14px;
            border-radius: 20px;
            margin-bottom: 14px;
            border: 1px solid var(--highlight-border);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 600;
            font-size: 15px;
            padding: 12px 26px;
            border-radius: var(--radius-sm);
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
            letter-spacing: 0.3px;
            line-height: 1.2;
        }

        .btn-primary {
            background-color: var(--highlight);
            color: #0a1410;
            border: 1px solid var(--highlight);
        }

        .btn-primary:hover {
            background-color: #5ff0bc;
            border-color: #5ff0bc;
            color: #0a1410;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(45, 226, 166, 0.25);
        }

        .btn-secondary {
            background: transparent;
            color: var(--text-primary);
            border: 1px solid rgba(230, 237, 243, 0.3);
        }

        .btn-secondary:hover {
            border-color: var(--highlight);
            color: var(--highlight);
            background: var(--highlight-soft);
            transform: translateY(-2px);
        }

        .btn-sm {
            padding: 9px 18px;
            font-size: 13px;
        }

        .card {
            background: var(--bg-card);
            border: 1px solid rgba(45, 226, 166, 0.12);
            border-radius: var(--radius);
            padding: var(--spacing-md);
            transition: all var(--transition);
            box-shadow: none;
        }

        .card:hover {
            border-color: var(--highlight-border);
            box-shadow: var(--shadow);
            transform: translateY(-3px);
        }

        .card-title {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .card-text {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 0;
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 12px;
            font-weight: 500;
            padding: 4px 12px;
            border-radius: 14px;
            background: var(--highlight-soft);
            color: var(--highlight);
            border: 1px solid var(--highlight-border);
            letter-spacing: 0.3px;
            white-space: nowrap;
        }

        .badge--muted {
            background: rgba(143, 163, 181, 0.1);
            color: var(--text-secondary);
            border-color: rgba(143, 163, 181, 0.2);
        }

        .badge--purple {
            background: var(--purple-soft);
            color: #b5a3d6;
            border-color: rgba(109, 91, 143, 0.35);
        }

        .divider {
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(45, 226, 166, 0.25), transparent);
            margin: var(--spacing-md) 0;
            border: none;
        }

        .img-cover {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: var(--radius-sm);
            background: var(--bg-panel);
        }

        .img-cover-sm {
            height: 160px;
        }

        .img-cover-lg {
            height: 260px;
        }

        /* Header / Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(13, 18, 24, 0.88);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(45, 226, 166, 0.1);
            padding: 0;
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 16px;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.5px;
            white-space: nowrap;
            text-decoration: none;
        }

        .brand-logo:hover {
            color: var(--highlight);
        }

        .brand-icon {
            width: 36px;
            height: 36px;
            border-radius: var(--radius-sm);
            background: var(--highlight-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--highlight);
            font-size: 18px;
            border: 1px solid var(--highlight-border);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-links li {
            margin: 0;
        }

        .nav-links a {
            display: inline-flex;
            align-items: center;
            padding: 8px 14px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            text-decoration: none;
            white-space: nowrap;
        }

        .nav-links a:hover {
            color: var(--text-primary);
            background: rgba(230, 237, 243, 0.06);
        }

        .nav-links a.active {
            color: var(--highlight);
            background: var(--highlight-soft);
            border: 1px solid var(--highlight-border);
        }

        .nav-search {
            display: flex;
            align-items: center;
            gap: 8px;
            background: rgba(230, 237, 243, 0.06);
            border: 1px solid rgba(230, 237, 243, 0.15);
            border-radius: var(--radius-sm);
            padding: 6px 12px;
            min-width: 160px;
            transition: border-color var(--transition);
        }

        .nav-search:focus-within {
            border-color: var(--highlight);
        }

        .nav-search i {
            color: var(--text-muted);
            font-size: 13px;
        }

        .nav-search input {
            background: transparent;
            border: none;
            color: var(--text-primary);
            font-size: 13px;
            width: 100%;
            outline: none;
        }

        .nav-search input::placeholder {
            color: var(--text-muted);
        }

        .nav-cta {
            white-space: nowrap;
        }

        .hamburger {
            display: none;
            background: transparent;
            border: 1px solid rgba(230, 237, 243, 0.2);
            border-radius: var(--radius-sm);
            padding: 8px 12px;
            cursor: pointer;
            color: var(--text-primary);
            font-size: 18px;
            transition: all var(--transition);
        }

        .hamburger:hover {
            border-color: var(--highlight);
            color: var(--highlight);
        }

        .mobile-nav {
            display: none;
            background: var(--bg-panel);
            border-bottom: 1px solid rgba(45, 226, 166, 0.1);
            padding: 8px 0;
        }

        .mobile-nav.open {
            display: block;
        }

        .mobile-nav a {
            display: block;
            padding: 10px 20px;
            color: var(--text-secondary);
            font-size: 14px;
            text-decoration: none;
            border-radius: 0;
            transition: all var(--transition);
        }

        .mobile-nav a:hover {
            color: var(--text-primary);
            background: rgba(230, 237, 243, 0.05);
        }

        .mobile-nav a.active {
            color: var(--highlight);
            background: var(--highlight-soft);
        }

        /* Hero */
        .hero {
            position: relative;
            min-height: 82vh;
            display: flex;
            align-items: center;
            padding: var(--spacing-xxl) 0;
            background-image: url('/assets/images/d1a06dca00cc0139.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(135deg, rgba(13, 18, 24, 0.93) 35%, rgba(13, 18, 24, 0.6) 70%, rgba(13, 18, 24, 0.8) 100%);
            z-index: 1;
        }

        .hero .container {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-xl);
            align-items: center;
        }

        .hero-content h1 {
            font-size: 38px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-primary);
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }

        .hero-content .hero-description {
            font-size: 15px;
            line-height: 1.8;
            color: var(--text-secondary);
            max-width: 520px;
            margin-bottom: 28px;
        }

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

        .hero-panel {
            background: rgba(18, 26, 36, 0.85);
            border: 1px solid rgba(45, 226, 166, 0.15);
            border-radius: var(--radius-lg);
            padding: var(--spacing-lg);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            box-shadow: var(--shadow);
        }

        .hero-panel .panel-title {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-secondary);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .hero-panel .panel-title i {
            color: var(--highlight);
        }

        .hero-stats-row {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 12px;
            margin-bottom: 16px;
        }

        .hero-stat-item {
            text-align: center;
            padding: 12px 8px;
            background: rgba(45, 226, 166, 0.06);
            border-radius: var(--radius-sm);
            border: 1px solid rgba(45, 226, 166, 0.12);
        }

        .hero-stat-item .stat-number {
            font-size: 22px;
            font-weight: 700;
            color: var(--highlight);
            font-variant-numeric: tabular-nums;
            letter-spacing: -0.5px;
        }

        .hero-stat-item .stat-label {
            font-size: 11px;
            color: var(--text-secondary);
            margin-top: 4px;
        }

        .hero-mini-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .hero-mini-list li {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 8px 0;
            font-size: 13px;
            color: var(--text-secondary);
            border-bottom: 1px solid rgba(230, 237, 243, 0.06);
        }

        .hero-mini-list li:last-child {
            border-bottom: none;
        }

        .hero-mini-list li i {
            color: var(--highlight);
            font-size: 12px;
        }

        /* Metrics Dashboard */
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 16px;
        }

        .metric-card {
            background: var(--bg-card);
            border: 1px solid rgba(45, 226, 166, 0.12);
            border-radius: var(--radius);
            padding: 20px 16px;
            text-align: center;
            transition: all var(--transition);
        }

        .metric-card:hover {
            border-color: var(--highlight-border);
            transform: translateY(-3px);
        }

        .metric-card .metric-value {
            font-size: 32px;
            font-weight: 700;
            color: var(--highlight);
            font-variant-numeric: tabular-nums;
            letter-spacing: -0.5px;
            margin-bottom: 4px;
        }

        .metric-card .metric-label {
            font-size: 13px;
            color: var(--text-secondary);
        }

        /* Services Matrix */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .services-grid .card--wide {
            grid-column: span 2;
        }

        .service-card-img {
            width: 100%;
            height: 140px;
            object-fit: cover;
            border-radius: var(--radius-sm);
            margin-bottom: 14px;
        }

        /* Comparison */
        .comparison-wrapper {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }

        .comparison-card {
            background: var(--bg-card);
            border: 1px solid rgba(143, 163, 181, 0.15);
            border-radius: var(--radius);
            padding: var(--spacing-lg);
        }

        .comparison-card--highlight {
            border-color: var(--highlight-border);
            background: rgba(45, 226, 166, 0.05);
        }

        .comparison-card h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 16px;
            color: var(--text-primary);
        }

        .comparison-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .comparison-list li {
            padding: 8px 0;
            font-size: 14px;
            color: var(--text-secondary);
            display: flex;
            align-items: flex-start;
            gap: 8px;
            border-bottom: 1px solid rgba(230, 237, 243, 0.05);
        }

        .comparison-list li:last-child {
            border-bottom: none;
        }

        .comparison-list li i {
            color: var(--text-muted);
            margin-top: 3px;
            font-size: 12px;
        }

        .comparison-card--highlight .comparison-list li i {
            color: var(--highlight);
        }

        /* Milestones */
        .timeline {
            position: relative;
            padding-left: 24px;
        }

        .timeline::before {
            content: '';
            position: absolute;
            left: 8px;
            top: 0;
            bottom: 0;
            width: 2px;
            background: linear-gradient(180deg, var(--highlight), rgba(45, 226, 166, 0.1));
            border-radius: 2px;
        }

        .timeline-item {
            position: relative;
            padding-bottom: 28px;
            padding-left: 28px;
        }

        .timeline-item:last-child {
            padding-bottom: 0;
        }

        .timeline-item::before {
            content: '';
            position: absolute;
            left: -20px;
            top: 5px;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--highlight);
            border: 3px solid var(--bg-dark);
            box-shadow: 0 0 0 3px rgba(45, 226, 166, 0.3);
        }

        .timeline-item .timeline-year {
            font-size: 13px;
            font-weight: 600;
            color: var(--highlight);
            margin-bottom: 4px;
        }

        .timeline-item .timeline-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 6px;
        }

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

        /* Brand Section */
        .brand-section {
            background: var(--bg-panel);
            border-radius: var(--radius-lg);
            padding: var(--spacing-lg);
            border: 1px solid rgba(45, 226, 166, 0.1);
        }

        .brand-section p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.85;
            margin-bottom: 12px;
        }

        .brand-section p:last-child {
            margin-bottom: 0;
        }

        /* Scenarios */
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .scenario-card {
            background: var(--bg-card);
            border: 1px solid rgba(45, 226, 166, 0.12);
            border-radius: var(--radius);
            overflow: hidden;
            transition: all var(--transition);
        }

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

        .scenario-card img {
            width: 100%;
            height: 170px;
            object-fit: cover;
        }

        .scenario-card-body {
            padding: 18px;
        }

        .scenario-card-body h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .scenario-card-body p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }

        /* Data Insights */
        .insights-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }

        .insight-card {
            background: rgba(18, 26, 36, 0.8);
            border: 1px solid rgba(45, 226, 166, 0.1);
            border-radius: var(--radius);
            padding: 18px;
            text-align: center;
            transition: all var(--transition);
        }

        .insight-card:hover {
            border-color: var(--highlight-border);
        }

        .insight-card .insight-chart {
            width: 100%;
            height: 60px;
            background: linear-gradient(180deg, rgba(45, 226, 166, 0.1) 20%, rgba(45, 226, 166, 0.3) 60%, rgba(45, 226, 166, 0.05) 100%);
            border-radius: var(--radius-sm);
            margin-bottom: 12px;
            position: relative;
            overflow: hidden;
        }

        .insight-card .insight-chart::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: repeating-linear-gradient(90deg, transparent, transparent 25%, rgba(45, 226, 166, 0.2) 25%, rgba(45, 226, 166, 0.2) 26%);
        }

        .insight-card .insight-value {
            font-size: 20px;
            font-weight: 700;
            color: var(--highlight);
            font-variant-numeric: tabular-nums;
        }

        .insight-card .insight-label {
            font-size: 12px;
            color: var(--text-secondary);
            margin-top: 4px;
        }

        /* News List */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        .news-card {
            display: flex;
            gap: 16px;
            background: var(--bg-card);
            border: 1px solid rgba(45, 226, 166, 0.1);
            border-radius: var(--radius);
            padding: 16px;
            transition: all var(--transition);
        }

        .news-card:hover {
            border-color: var(--highlight-border);
            transform: translateY(-3px);
            box-shadow: var(--shadow);
        }

        .news-card img {
            width: 160px;
            height: 110px;
            object-fit: cover;
            border-radius: var(--radius-sm);
            flex-shrink: 0;
        }

        .news-card-body {
            flex: 1;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .news-card-body .news-meta {
            display: flex;
            gap: 12px;
            align-items: center;
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 6px;
        }

        .news-card-body h3 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 6px;
            line-height: 1.4;
        }

        .news-card-body p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin: 0;
        }

        /* Assurance */
        .assurance-grid {
            display: grid;
            grid-template-columns: repeat(6, 1fr);
            gap: 14px;
        }

        .assurance-item {
            background: var(--bg-card);
            border: 1px solid rgba(45, 226, 166, 0.1);
            border-radius: var(--radius);
            padding: 16px;
            text-align: center;
            transition: all var(--transition);
        }

        .assurance-item:hover {
            border-color: var(--highlight-border);
            transform: translateY(-3px);
        }

        .assurance-item i {
            font-size: 24px;
            color: var(--highlight);
            margin-bottom: 10px;
            display: block;
        }

        .assurance-item span {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.4;
            display: block;
        }

        /* Quick FAQ */
        .quick-faq-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
        }

        .quick-faq-item {
            background: var(--bg-card);
            border: 1px solid rgba(45, 226, 166, 0.1);
            border-radius: var(--radius);
            padding: 18px;
        }

        .quick-faq-item .qa-question {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 6px;
            display: flex;
            align-items: flex-start;
            gap: 8px;
        }

        .quick-faq-item .qa-question i {
            color: var(--highlight);
            font-size: 12px;
            margin-top: 4px;
        }

        .quick-faq-item .qa-answer {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
            padding-left: 20px;
        }

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

        .faq-item {
            background: var(--bg-card);
            border: 1px solid rgba(45, 226, 166, 0.1);
            border-radius: var(--radius);
            padding: 18px 20px;
            cursor: pointer;
            transition: all var(--transition);
        }

        .faq-item:hover {
            border-color: var(--highlight-border);
        }

        .faq-item .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
        }

        .faq-item .faq-question i {
            color: var(--highlight);
            font-size: 14px;
            transition: transform var(--transition);
            flex-shrink: 0;
        }

        .faq-item .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding-top 0.3s ease;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding-top: 12px;
        }

        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }

        /* Contact Form */
        .contact-wrapper {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            align-items: start;
        }

        .contact-info p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 16px;
        }

        .contact-form {
            background: var(--bg-card);
            border: 1px solid rgba(45, 226, 166, 0.12);
            border-radius: var(--radius-lg);
            padding: var(--spacing-lg);
        }

        .contact-form label {
            font-size: 13px;
            font-weight: 500;
            color: var(--text-primary);
            margin-bottom: 6px;
            display: block;
        }

        .contact-form input,
        .contact-form textarea {
            width: 100%;
            background: var(--bg-input);
            border: 1px solid rgba(230, 237, 243, 0.15);
            border-radius: var(--radius-sm);
            padding: 11px 14px;
            color: var(--text-primary);
            font-size: 14px;
            transition: border-color var(--transition);
            margin-bottom: 16px;
        }

        .contact-form input:focus,
        .contact-form textarea:focus {
            border-color: var(--highlight);
            outline: none;
        }

        .contact-form input::placeholder,
        .contact-form textarea::placeholder {
            color: var(--text-muted);
        }

        .contact-form textarea {
            min-height: 100px;
            resize: vertical;
        }

        .form-note {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 10px;
            line-height: 1.6;
        }

        .form-trust {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-top: 14px;
            padding-top: 14px;
            border-top: 1px solid rgba(230, 237, 243, 0.08);
        }

        .form-trust span {
            font-size: 12px;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .form-trust span i {
            color: var(--highlight);
            font-size: 11px;
        }

        /* Footer */
        .site-footer {
            background: #0a0e13;
            border-top: 1px solid rgba(45, 226, 166, 0.1);
            padding: var(--spacing-lg) 0 var(--spacing-md);
        }

        .footer-top {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            margin-bottom: var(--spacing-md);
        }

        .footer-brand .brand-logo {
            font-size: 18px;
            margin-bottom: 8px;
        }

        .footer-brand p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }

        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            align-items: flex-start;
            justify-content: flex-end;
        }

        .footer-links a {
            font-size: 13px;
            color: var(--text-secondary);
            text-decoration: none;
            transition: color var(--transition);
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(230, 237, 243, 0.06);
            padding-top: var(--spacing-sm);
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: space-between;
            align-items: center;
            font-size: 12px;
            color: var(--text-muted);
        }

        .footer-bottom p {
            margin: 0;
            font-size: 12px;
        }

        .footer-bottom a {
            color: var(--text-secondary);
            text-decoration: none;
            font-size: 12px;
        }

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

        /* Responsive */
        @media (max-width: 1024px) {
            .hero .container {
                grid-template-columns: 1fr;
                gap: var(--spacing-lg);
            }

            .hero {
                min-height: auto;
                padding: var(--spacing-xl) 0;
            }

            .hero-content h1 {
                font-size: 32px;
            }

            .metrics-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 12px;
            }

            .services-grid {
                grid-template-columns: 1fr 1fr;
            }

            .services-grid .card--wide {
                grid-column: span 2;
            }

            .comparison-wrapper {
                grid-template-columns: 1fr;
            }

            .scenario-grid {
                grid-template-columns: 1fr 1fr;
            }

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

            .assurance-grid {
                grid-template-columns: repeat(3, 1fr);
            }

            .contact-wrapper {
                grid-template-columns: 1fr;
            }

            .footer-top {
                grid-template-columns: 1fr;
            }

            .footer-links {
                justify-content: flex-start;
            }
        }

        @media (max-width: 768px) {
            .section {
                padding: var(--spacing-lg) 0;
            }

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

            .nav-links {
                display: none;
            }

            .nav-search {
                display: none;
            }

            .hamburger {
                display: inline-flex;
            }

            .nav-cta {
                display: none;
            }

            .site-header .container {
                height: 60px;
            }

            .hero {
                padding: var(--spacing-lg) 0;
            }

            .hero-content h1 {
                font-size: 28px;
            }

            .hero-actions {
                flex-direction: column;
                gap: 10px;
            }

            .hero-actions .btn {
                width: 100%;
            }

            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 10px;
            }

            .metric-card .metric-value {
                font-size: 26px;
            }

            .services-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }

            .services-grid .card--wide {
                grid-column: span 1;
            }

            .scenario-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }

            .news-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }

            .news-card {
                flex-direction: column;
            }

            .news-card img {
                width: 100%;
                height: 170px;
            }

            .quick-faq-grid {
                grid-template-columns: 1fr;
            }

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

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

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

            .timeline {
                padding-left: 16px;
            }

            .timeline-item {
                padding-left: 20px;
            }

            .timeline-item::before {
                left: -14px;
            }

            .brand-section {
                padding: var(--spacing-md);
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 14px;
                padding-right: 14px;
            }

            .hero-content h1 {
                font-size: 24px;
            }

            .hero-description {
                font-size: 14px;
            }

            .hero-stats-row {
                grid-template-columns: repeat(3, 1fr);
                gap: 6px;
            }

            .hero-stat-item .stat-number {
                font-size: 18px;
            }

            .metrics-grid {
                grid-template-columns: 1fr 1fr;
            }

            .metric-card .metric-value {
                font-size: 22px;
            }

            .assurance-grid {
                grid-template-columns: 1fr;
            }

            .insights-grid {
                grid-template-columns: 1fr;
            }

            .section-title {
                font-size: 20px;
            }

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

            .hero-panel {
                padding: var(--spacing-md);
            }
        }

/* roulang page: category2 */
:root {
            --bg-dark: #0d1218;
            --bg-panel: #121a24;
            --bg-card: #16202b;
            --bg-input: #0f1822;
            --text-primary: #e6edf3;
            --text-secondary: #8fa3b5;
            --text-muted: #5e7387;
            --highlight: #2de2a6;
            --highlight-soft: rgba(45, 226, 166, 0.12);
            --highlight-border: rgba(45, 226, 166, 0.22);
            --purple-muted: #6d5b8f;
            --purple-soft: rgba(109, 91, 143, 0.15);
            --radius: 8px;
            --radius-sm: 6px;
            --radius-lg: 10px;
            --shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 12px 32px rgba(0, 0, 0, 0.45);
            --transition: 0.22s ease;
            --font-stack: system-ui, -apple-system, 'Segoe UI', '苹方', '微软雅黑', 'PingFang SC', 'Hiragino Sans GB', 'Source Han Sans SC', sans-serif;
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 24px;
            --spacing-lg: 40px;
            --spacing-xl: 56px;
            --spacing-xxl: 72px;
        }

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

        body {
            font-family: var(--font-stack);
            background-color: var(--bg-dark);
            color: var(--text-primary);
            font-size: 15px;
            line-height: 1.7;
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: var(--highlight);
            text-decoration: none;
            transition: color var(--transition);
        }

        a:hover {
            color: #5ff0bc;
        }

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

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

        button,
        input,
        textarea,
        select {
            font-family: var(--font-stack);
            font-size: 15px;
        }

        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--highlight);
            outline-offset: 2px;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        .section {
            padding: var(--spacing-xl) 0;
        }

        .section--compact {
            padding: var(--spacing-lg) 0;
        }

        .section--dark-alt {
            background-color: var(--bg-panel);
        }

        .section--darker {
            background-color: #0a0e13;
        }

        .section-title {
            font-size: 26px;
            font-weight: 700;
            line-height: 1.35;
            margin-bottom: 12px;
            color: var(--text-primary);
            letter-spacing: 0.5px;
        }

        .section-subtitle {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.75;
            max-width: 680px;
            margin-bottom: var(--spacing-md);
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 1.2px;
            color: var(--highlight);
            background: var(--highlight-soft);
            padding: 6px 14px;
            border-radius: 20px;
            margin-bottom: 14px;
            border: 1px solid var(--highlight-border);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 600;
            font-size: 15px;
            padding: 12px 26px;
            border-radius: var(--radius-sm);
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
            letter-spacing: 0.3px;
            line-height: 1.2;
        }

        .btn-primary {
            background-color: var(--highlight);
            color: #0a1410;
            border: 1px solid var(--highlight);
        }

        .btn-primary:hover {
            background-color: #5ff0bc;
            border-color: #5ff0bc;
            color: #0a1410;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(45, 226, 166, 0.25);
        }

        .btn-secondary {
            background: transparent;
            color: var(--text-primary);
            border: 1px solid rgba(230, 237, 243, 0.3);
        }

        .btn-secondary:hover {
            border-color: var(--highlight);
            color: var(--highlight);
            background: var(--highlight-soft);
            transform: translateY(-2px);
        }

        .btn-sm {
            padding: 9px 18px;
            font-size: 13px;
        }

        .card {
            background: var(--bg-card);
            border: 1px solid rgba(45, 226, 166, 0.12);
            border-radius: var(--radius);
            padding: var(--spacing-md);
            transition: all var(--transition);
            box-shadow: none;
        }

        .card:hover {
            border-color: var(--highlight-border);
            box-shadow: var(--shadow);
            transform: translateY(-3px);
        }

        .card-title {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .card-text {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 0;
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 12px;
            font-weight: 500;
            padding: 4px 10px;
            border-radius: 16px;
            background: var(--highlight-soft);
            color: var(--highlight);
            border: 1px solid var(--highlight-border);
            letter-spacing: 0.3px;
        }

        .badge--purple {
            background: var(--purple-soft);
            color: #b7a2d8;
            border-color: rgba(109, 91, 143, 0.25);
        }

        .badge--muted {
            background: rgba(94, 115, 135, 0.15);
            color: var(--text-secondary);
            border-color: rgba(94, 115, 135, 0.25);
        }

        /* Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(13, 18, 24, 0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(45, 226, 166, 0.1);
            padding: 12px 0;
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: var(--spacing-md);
            flex-wrap: nowrap;
        }

        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 18px;
            color: var(--text-primary);
            letter-spacing: 0.5px;
            text-decoration: none;
            white-space: nowrap;
        }

        .brand-logo:hover {
            color: var(--highlight);
        }

        .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 34px;
            height: 34px;
            background: var(--highlight-soft);
            border: 1px solid var(--highlight-border);
            border-radius: var(--radius-sm);
            color: var(--highlight);
            font-size: 16px;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            margin: 0;
            padding: 0;
            flex-wrap: nowrap;
        }

        .nav-links li {
            margin: 0;
        }

        .nav-links a {
            display: inline-flex;
            align-items: center;
            padding: 8px 14px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            white-space: nowrap;
            letter-spacing: 0.3px;
        }

        .nav-links a:hover {
            color: var(--text-primary);
            background: rgba(230, 237, 243, 0.06);
        }

        .nav-links a.active {
            color: var(--highlight);
            background: var(--highlight-soft);
            border: 1px solid var(--highlight-border);
        }

        .nav-search {
            display: flex;
            align-items: center;
            gap: 6px;
            background: var(--bg-input);
            border: 1px solid rgba(230, 237, 243, 0.15);
            border-radius: var(--radius-sm);
            padding: 8px 14px;
            min-width: 180px;
            transition: border-color var(--transition);
        }

        .nav-search:focus-within {
            border-color: var(--highlight);
        }

        .nav-search i {
            color: var(--text-muted);
            font-size: 13px;
        }

        .nav-search input {
            background: transparent;
            border: none;
            outline: none;
            color: var(--text-primary);
            font-size: 13px;
            width: 100%;
            letter-spacing: 0.3px;
        }

        .nav-search input::placeholder {
            color: var(--text-muted);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            white-space: nowrap;
        }

        .nav-actions .btn {
            padding: 10px 20px;
            font-size: 13px;
        }

        .nav-toggle {
            display: none;
            background: transparent;
            border: 1px solid rgba(230, 237, 243, 0.25);
            border-radius: var(--radius-sm);
            color: var(--text-primary);
            width: 40px;
            height: 38px;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            font-size: 18px;
            transition: all var(--transition);
        }

        .nav-toggle:hover {
            border-color: var(--highlight);
            color: var(--highlight);
        }

        .mobile-menu {
            display: none;
            background: var(--bg-panel);
            border-bottom: 1px solid rgba(45, 226, 166, 0.12);
            padding: var(--spacing-sm) 0;
        }

        .mobile-menu ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .mobile-menu a {
            display: block;
            padding: 10px 20px;
            color: var(--text-secondary);
            font-size: 14px;
            border-left: 3px solid transparent;
            transition: all var(--transition);
        }

        .mobile-menu a:hover,
        .mobile-menu a.active {
            color: var(--highlight);
            background: var(--highlight-soft);
            border-left-color: var(--highlight);
        }

        /* Breadcrumb */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            color: var(--text-secondary);
            margin-bottom: var(--spacing-sm);
            flex-wrap: wrap;
        }

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

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

        .breadcrumb i {
            font-size: 10px;
            color: var(--text-muted);
            margin: 0 2px;
        }

        .breadcrumb span {
            color: var(--text-primary);
            font-weight: 500;
        }

        /* Category Hero */
        .category-hero {
            padding: var(--spacing-lg) 0 var(--spacing-md);
            background: linear-gradient(180deg, var(--bg-panel) 0%, var(--bg-dark) 100%);
            border-bottom: 1px solid rgba(45, 226, 166, 0.08);
            position: relative;
            overflow: hidden;
        }

        .category-hero::after {
            content: '';
            position: absolute;
            top: -50%;
            right: -10%;
            width: 60%;
            height: 200%;
            background: radial-gradient(ellipse, rgba(45, 226, 166, 0.06) 0%, transparent 70%);
            pointer-events: none;
        }

        .category-hero .container {
            position: relative;
            z-index: 1;
        }

        .category-hero h1 {
            font-size: 34px;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 12px;
            color: var(--text-primary);
            letter-spacing: 0.5px;
        }

        .category-hero .hero-sub {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.75;
            max-width: 700px;
            margin-bottom: 0;
        }

        /* Data Mini Dashboard */
        .mini-stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-sm);
        }

        .stat-tile {
            background: var(--bg-card);
            border: 1px solid rgba(45, 226, 166, 0.1);
            border-radius: var(--radius);
            padding: var(--spacing-md);
            text-align: center;
            transition: all var(--transition);
        }

        .stat-tile:hover {
            border-color: var(--highlight-border);
            box-shadow: var(--shadow);
        }

        .stat-number {
            font-size: 30px;
            font-weight: 700;
            color: var(--highlight);
            font-variant-numeric: tabular-nums;
            line-height: 1.2;
            margin-bottom: 6px;
            letter-spacing: -0.5px;
        }

        .stat-label {
            font-size: 13px;
            color: var(--text-secondary);
            letter-spacing: 0.3px;
        }

        /* Insight List */
        .insight-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-md);
        }

        .insight-card {
            background: var(--bg-card);
            border: 1px solid rgba(45, 226, 166, 0.1);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }

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

        .insight-card .card-img {
            height: 180px;
            overflow: hidden;
            position: relative;
            background: var(--bg-panel);
        }

        .insight-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .insight-card:hover .card-img img {
            transform: scale(1.05);
        }

        .insight-card .card-img::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 40%;
            background: linear-gradient(to top, var(--bg-card) 20%, transparent);
            pointer-events: none;
        }

        .insight-card .card-body {
            padding: var(--spacing-md);
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .insight-card .card-meta {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 10px;
            flex-wrap: wrap;
        }

        .insight-card .card-title {
            font-size: 16px;
            font-weight: 600;
            line-height: 1.45;
            margin-bottom: 8px;
            color: var(--text-primary);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .insight-card .card-text {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .insight-card .card-date {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: auto;
            padding-top: 10px;
            letter-spacing: 0.3px;
        }

        /* Featured Insight - wide card */
        .insight-card--featured {
            grid-column: span 2;
        }

        /* Topics Section */
        .topics-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-md);
        }

        .topic-card {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            background: var(--bg-card);
            border: 1px solid rgba(45, 226, 166, 0.1);
            border-radius: var(--radius);
            padding: var(--spacing-sm) var(--spacing-md);
            transition: all var(--transition);
            cursor: default;
        }

        .topic-card:hover {
            border-color: var(--highlight-border);
            background: var(--bg-panel);
        }

        .topic-icon {
            width: 42px;
            height: 42px;
            min-width: 42px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            background: var(--highlight-soft);
            color: var(--highlight);
            font-size: 18px;
            border: 1px solid var(--highlight-border);
        }

        .topic-info h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            margin: 0 0 4px;
        }

        .topic-info p {
            font-size: 12px;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.5;
        }

        /* FAQ Section */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
            max-width: 820px;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid rgba(45, 226, 166, 0.1);
            border-radius: var(--radius);
            overflow: hidden;
            transition: all var(--transition);
        }

        .faq-item:hover {
            border-color: var(--highlight-border);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: var(--spacing-sm);
            padding: var(--spacing-md);
            cursor: pointer;
            transition: background var(--transition);
            user-select: none;
        }

        .faq-question:hover {
            background: rgba(45, 226, 166, 0.05);
        }

        .faq-question .faq-text {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.5;
            margin: 0;
        }

        .faq-question .faq-toggle {
            min-width: 24px;
            height: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--highlight);
            font-size: 12px;
            transition: transform var(--transition);
        }

        .faq-item.open .faq-toggle {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
            padding: 0 var(--spacing-md);
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 var(--spacing-md) var(--spacing-md);
        }

        .faq-answer p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin: 0;
        }

        /* CTA Section */
        .cta-section {
            padding: var(--spacing-xl) 0;
            background: linear-gradient(135deg, var(--bg-panel) 0%, #0d1a17 50%, var(--bg-dark) 100%);
            border-top: 1px solid rgba(45, 226, 166, 0.1);
            border-bottom: 1px solid rgba(45, 226, 166, 0.1);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -5%;
            width: 50%;
            height: 160%;
            background: radial-gradient(ellipse, rgba(45, 226, 166, 0.08) 0%, transparent 65%);
            pointer-events: none;
        }

        .cta-section .container {
            position: relative;
            z-index: 1;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: var(--spacing-lg);
            flex-wrap: wrap;
        }

        .cta-section .cta-text {
            flex: 1;
            min-width: 320px;
        }

        .cta-section .cta-text h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
            letter-spacing: 0.5px;
        }

        .cta-section .cta-text p {
            font-size: 14px;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.7;
        }

        .cta-section .cta-actions {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            flex-wrap: wrap;
        }

        /* Footer */
        .site-footer {
            background: #0a0e13;
            border-top: 1px solid rgba(45, 226, 166, 0.1);
            padding: var(--spacing-lg) 0 var(--spacing-md);
            font-size: 13px;
        }

        .site-footer .footer-top {
            display: flex;
            align-items: flex-start;
            justify-content: space-between;
            gap: var(--spacing-lg);
            flex-wrap: wrap;
            padding-bottom: var(--spacing-md);
            border-bottom: 1px solid rgba(230, 237, 243, 0.08);
            margin-bottom: var(--spacing-md);
        }

        .site-footer .footer-brand {
            flex: 1;
            min-width: 260px;
        }

        .site-footer .footer-brand p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 10px 0 0;
            max-width: 360px;
        }

        .site-footer .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 6px 18px;
            max-width: 500px;
        }

        .site-footer .footer-links a {
            font-size: 13px;
            color: var(--text-secondary);
            transition: color var(--transition);
        }

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

        .site-footer .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 8px 16px;
            font-size: 12px;
            color: var(--text-muted);
        }

        .site-footer .footer-bottom p {
            margin: 0;
            font-size: 12px;
        }

        .site-footer .footer-bottom a {
            color: var(--text-secondary);
            font-size: 12px;
            transition: color var(--transition);
        }

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

        /* Responsive */
        @media (max-width: 1024px) {
            .insight-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .insight-card--featured {
                grid-column: span 2;
            }

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

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

            .nav-search {
                min-width: 140px;
            }

            .nav-links a {
                padding: 8px 10px;
                font-size: 13px;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }

            .nav-search {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .mobile-menu {
                display: block;
            }

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

            .mobile-menu:not(.open) {
                display: none;
            }

            .category-hero h1 {
                font-size: 26px;
            }

            .section {
                padding: var(--spacing-lg) 0;
            }

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

            .insight-grid {
                grid-template-columns: 1fr;
            }

            .insight-card--featured {
                grid-column: span 1;
            }

            .insight-card .card-img {
                height: 160px;
            }

            .cta-section .container {
                flex-direction: column;
                align-items: flex-start;
            }

            .site-footer .footer-top {
                flex-direction: column;
                gap: var(--spacing-md);
            }
        }

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

            .topics-grid {
                grid-template-columns: 1fr;
            }

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

            .cta-section .cta-actions {
                flex-direction: column;
                width: 100%;
            }

            .cta-section .cta-actions .btn {
                width: 100%;
            }

            .site-footer .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }

            .breadcrumb {
                font-size: 12px;
            }

            .category-hero h1 {
                font-size: 22px;
            }

            .category-hero .hero-sub {
                font-size: 14px;
            }

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

            .insight-card .card-img {
                height: 140px;
            }
        }

/* roulang page: category1 */
:root {
        --bg-dark: #0d1218;
        --bg-panel: #121a24;
        --bg-card: #16202b;
        --bg-input: #0f1822;
        --text-primary: #e6edf3;
        --text-secondary: #8fa3b5;
        --text-muted: #5e7387;
        --highlight: #2de2a6;
        --highlight-soft: rgba(45, 226, 166, 0.12);
        --highlight-border: rgba(45, 226, 166, 0.22);
        --purple-muted: #6d5b8f;
        --purple-soft: rgba(109, 91, 143, 0.15);
        --radius: 8px;
        --radius-sm: 6px;
        --radius-lg: 10px;
        --shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
        --shadow-hover: 0 12px 32px rgba(0, 0, 0, 0.45);
        --transition: 0.22s ease;
        --font-stack: system-ui, -apple-system, 'Segoe UI', '苹方', '微软雅黑', 'PingFang SC', 'Hiragino Sans GB', 'Source Han Sans SC', sans-serif;
        --spacing-xs: 8px;
        --spacing-sm: 16px;
        --spacing-md: 24px;
        --spacing-lg: 40px;
        --spacing-xl: 56px;
        --spacing-xxl: 72px;
    }

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

    body {
        font-family: var(--font-stack);
        background-color: var(--bg-dark);
        color: var(--text-primary);
        font-size: 15px;
        line-height: 1.7;
        margin: 0;
        padding: 0;
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }

    a {
        color: var(--highlight);
        text-decoration: none;
        transition: color var(--transition);
    }

    a:hover {
        color: #5ff0bc;
    }

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

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

    button,
    input,
    textarea,
    select {
        font-family: var(--font-stack);
        font-size: 15px;
    }

    button:focus-visible,
    input:focus-visible,
    textarea:focus-visible,
    select:focus-visible {
        outline: 2px solid var(--highlight);
        outline-offset: 2px;
    }

    .container {
        max-width: 1200px;
        margin: 0 auto;
        padding-left: 20px;
        padding-right: 20px;
    }

    .section {
        padding: var(--spacing-xl) 0;
    }

    .section--compact {
        padding: var(--spacing-lg) 0;
    }

    .section--dark-alt {
        background-color: var(--bg-panel);
    }

    .section--darker {
        background-color: #0a0e13;
    }

    .section-tag {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        font-size: 12px;
        font-weight: 600;
        text-transform: uppercase;
        letter-spacing: 1.2px;
        color: var(--highlight);
        background: var(--highlight-soft);
        padding: 6px 14px;
        border-radius: 20px;
        margin-bottom: 14px;
        border: 1px solid var(--highlight-border);
    }

    .section-title {
        font-size: 26px;
        font-weight: 700;
        line-height: 1.35;
        margin-bottom: 12px;
        color: var(--text-primary);
        letter-spacing: 0.5px;
    }

    .section-subtitle {
        font-size: 15px;
        color: var(--text-secondary);
        line-height: 1.75;
        max-width: 680px;
        margin-bottom: var(--spacing-md);
    }

    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        font-weight: 600;
        font-size: 15px;
        padding: 12px 26px;
        border-radius: var(--radius-sm);
        border: none;
        cursor: pointer;
        transition: all var(--transition);
        text-decoration: none;
        letter-spacing: 0.3px;
        line-height: 1.2;
    }

    .btn-primary {
        background-color: var(--highlight);
        color: #0a1410;
        border: 1px solid var(--highlight);
    }

    .btn-primary:hover {
        background-color: #5ff0bc;
        border-color: #5ff0bc;
        color: #0a1410;
        transform: translateY(-2px);
        box-shadow: 0 8px 20px rgba(45, 226, 166, 0.25);
    }

    .btn-secondary {
        background: transparent;
        color: var(--text-primary);
        border: 1px solid rgba(230, 237, 243, 0.3);
    }

    .btn-secondary:hover {
        border-color: var(--highlight);
        color: var(--highlight);
        background: var(--highlight-soft);
        transform: translateY(-2px);
    }

    .btn-sm {
        padding: 9px 18px;
        font-size: 13px;
    }

    .card {
        background: var(--bg-card);
        border: 1px solid rgba(45, 226, 166, 0.12);
        border-radius: var(--radius);
        padding: var(--spacing-md);
        transition: all var(--transition);
        box-shadow: none;
    }

    .card:hover {
        border-color: var(--highlight-border);
        box-shadow: var(--shadow);
        transform: translateY(-3px);
    }

    .card-title {
        font-size: 17px;
        font-weight: 600;
        color: var(--text-primary);
        margin-bottom: 8px;
        line-height: 1.4;
    }

    .card-text {
        font-size: 14px;
        color: var(--text-secondary);
        line-height: 1.75;
        margin-bottom: 0;
    }

    .badge {
        display: inline-flex;
        align-items: center;
        gap: 4px;
        font-size: 12px;
        font-weight: 500;
        padding: 4px 10px;
        border-radius: 20px;
        background: var(--highlight-soft);
        color: var(--highlight);
        border: 1px solid var(--highlight-border);
        letter-spacing: 0.3px;
    }

    /* Header / Navigation */
    .site-header {
        position: sticky;
        top: 0;
        z-index: 100;
        background: rgba(13, 18, 24, 0.94);
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
        border-bottom: 1px solid rgba(45, 226, 166, 0.12);
    }

    .header-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 20px;
        min-height: 68px;
    }

    .brand-logo {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        font-weight: 700;
        font-size: 19px;
        color: var(--text-primary);
        letter-spacing: 0.5px;
        white-space: nowrap;
    }

    .brand-logo:hover {
        color: var(--highlight);
    }

    .brand-icon {
        width: 34px;
        height: 34px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        border-radius: 8px;
        background: var(--highlight-soft);
        color: var(--highlight);
        border: 1px solid var(--highlight-border);
        font-size: 16px;
    }

    .main-nav {
        flex: 1;
        display: flex;
        justify-content: center;
    }

    .nav-links {
        list-style: none;
        display: flex;
        align-items: center;
        gap: 6px;
        margin: 0;
        padding: 0;
    }

    .nav-links li a {
        display: inline-flex;
        align-items: center;
        padding: 9px 12px;
        border-radius: var(--radius-sm);
        color: var(--text-secondary);
        font-size: 14px;
        font-weight: 500;
        transition: all var(--transition);
        white-space: nowrap;
    }

    .nav-links li a:hover {
        color: var(--text-primary);
        background: rgba(45, 226, 166, 0.08);
    }

    .nav-links li a.active {
        color: var(--highlight);
        background: var(--highlight-soft);
        border: 1px solid var(--highlight-border);
    }

    .header-actions {
        display: flex;
        align-items: center;
        gap: 10px;
    }

    .command-search {
        display: flex;
        align-items: center;
        gap: 8px;
        background: rgba(18, 26, 36, 0.8);
        border: 1px solid rgba(230, 237, 243, 0.16);
        border-radius: 8px;
        padding: 8px 12px;
        min-width: 190px;
        transition: border-color var(--transition);
    }

    .command-search i {
        color: var(--text-muted);
        font-size: 13px;
    }

    .command-search input {
        background: transparent;
        border: none;
        outline: none;
        color: var(--text-primary);
        width: 100%;
        font-size: 13px;
    }

    .command-search input::placeholder {
        color: var(--text-muted);
    }

    .command-search:focus-within {
        border-color: var(--highlight-border);
    }

    .nav-toggle {
        display: none;
        background: transparent;
        border: 1px solid rgba(230, 237, 243, 0.18);
        color: var(--text-primary);
        width: 40px;
        height: 40px;
        border-radius: 8px;
        font-size: 17px;
        align-items: center;
        justify-content: center;
        cursor: pointer;
    }

    /* Page Hero */
    .page-hero {
        background: linear-gradient(rgba(13, 18, 24, 0.84), rgba(13, 18, 24, 0.96)), url('/assets/images/d1a06dca00cc0139.webp') center/cover no-repeat;
        padding: 44px 0 40px;
        border-bottom: 1px solid rgba(45, 226, 166, 0.1);
    }

    .breadcrumb {
        display: flex;
        align-items: center;
        gap: 6px;
        font-size: 13px;
        color: var(--text-muted);
        margin-bottom: 20px;
    }

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

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

    .breadcrumb i {
        font-size: 10px;
        color: var(--text-muted);
    }

    .page-hero-content h1 {
        font-size: 34px;
        font-weight: 700;
        line-height: 1.3;
        margin: 0 0 12px;
        letter-spacing: 0.5px;
        color: var(--text-primary);
    }

    .page-hero-desc {
        font-size: 16px;
        color: var(--text-secondary);
        line-height: 1.75;
        max-width: 720px;
        margin: 0;
    }

    /* Data strip */
    .data-strip-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 18px;
    }

    .data-strip-item {
        background: var(--bg-card);
        border: 1px solid rgba(45, 226, 166, 0.12);
        border-radius: var(--radius);
        padding: 20px 18px;
        transition: border-color var(--transition), background var(--transition);
    }

    .data-strip-item:hover {
        border-color: var(--highlight-border);
        background: #18232e;
    }

    .data-strip-number {
        display: block;
        font-size: 28px;
        font-weight: 700;
        color: var(--highlight);
        letter-spacing: 0.5px;
        margin-bottom: 6px;
        font-variant-numeric: tabular-nums;
    }

    .data-strip-label {
        font-size: 13px;
        color: var(--text-secondary);
    }

    /* Section heading row */
    .section-heading-row {
        display: flex;
        justify-content: space-between;
        align-items: flex-end;
        gap: 20px;
        margin-bottom: 24px;
    }

    .section-heading-row .section-title {
        margin-bottom: 8px;
    }

    .section-heading-row p {
        margin: 0;
        color: var(--text-secondary);
        font-size: 14px;
    }

    .list-sort {
        display: flex;
        align-items: center;
        gap: 8px;
        white-space: nowrap;
    }

    .sort-btn {
        background: transparent;
        border: 1px solid rgba(230, 237, 243, 0.16);
        color: var(--text-secondary);
        border-radius: 20px;
        padding: 7px 14px;
        font-size: 12px;
        cursor: pointer;
        transition: all var(--transition);
    }

    .sort-btn:hover {
        color: var(--text-primary);
        border-color: rgba(230, 237, 243, 0.3);
    }

    .sort-btn.active {
        background: var(--highlight-soft);
        color: var(--highlight);
        border-color: var(--highlight-border);
    }

    /* Article grid */
    .article-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 22px;
    }

    .article-card {
        background: var(--bg-card);
        border: 1px solid rgba(45, 226, 166, 0.12);
        border-radius: var(--radius);
        overflow: hidden;
        display: flex;
        flex-direction: column;
        transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
    }

    .article-card:hover {
        border-color: var(--highlight-border);
        transform: translateY(-3px);
        box-shadow: var(--shadow);
    }

    .article-img {
        display: block;
        height: 180px;
        overflow: hidden;
        background: #0f1822;
    }

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

    .article-card:hover .article-img img {
        transform: scale(1.04);
    }

    .article-body {
        padding: 16px;
        display: flex;
        flex-direction: column;
        flex: 1;
    }

    .article-meta {
        display: flex;
        align-items: center;
        gap: 10px;
        margin-bottom: 10px;
        font-size: 12px;
        color: var(--text-muted);
    }

    .article-title {
        font-size: 16px;
        font-weight: 600;
        line-height: 1.45;
        margin: 0 0 8px;
    }

    .article-title a {
        color: var(--text-primary);
    }

    .article-title a:hover {
        color: var(--highlight);
    }

    .article-excerpt {
        font-size: 13px;
        color: var(--text-secondary);
        line-height: 1.7;
        margin: 0;
    }

    .list-more {
        display: flex;
        justify-content: center;
        margin-top: 28px;
    }

    /* Topic grid */
    .topic-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 20px;
        margin-top: 24px;
    }

    .topic-card {
        background: var(--bg-card);
        border: 1px solid rgba(45, 226, 166, 0.12);
        border-radius: var(--radius);
        padding: 22px;
        display: block;
        transition: all var(--transition);
        text-decoration: none;
    }

    .topic-card:hover {
        border-color: var(--highlight-border);
        transform: translateY(-3px);
        box-shadow: var(--shadow);
    }

    .topic-card i {
        font-size: 20px;
        color: var(--highlight);
        margin-bottom: 16px;
    }

    .topic-card h3 {
        font-size: 17px;
        font-weight: 600;
        color: var(--text-primary);
        margin: 0 0 8px;
    }

    .topic-card p {
        font-size: 13px;
        color: var(--text-secondary);
        margin: 0;
        line-height: 1.65;
    }

    /* Tool / entry */
    .tool-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 40px;
        align-items: center;
    }

    .tool-text h2 {
        font-size: 25px;
        font-weight: 700;
        line-height: 1.35;
        margin: 0 0 14px;
        color: var(--text-primary);
    }

    .tool-text p {
        font-size: 15px;
        color: var(--text-secondary);
        margin: 0 0 24px;
        line-height: 1.75;
    }

    .tool-image {
        border-radius: var(--radius-lg);
        overflow: hidden;
        border: 1px solid rgba(45, 226, 166, 0.15);
        background: #0f1822;
    }

    .tool-image img {
        width: 100%;
        height: 280px;
        object-fit: cover;
    }

    /* FAQ */
    .faq-list {
        max-width: 820px;
        margin-top: 24px;
    }

    .faq-item {
        background: var(--bg-card);
        border: 1px solid rgba(45, 226, 166, 0.12);
        border-radius: var(--radius);
        margin-bottom: 12px;
        overflow: hidden;
        transition: border-color var(--transition);
    }

    .faq-item:hover {
        border-color: var(--highlight-border);
    }

    .faq-item summary {
        list-style: none;
        cursor: pointer;
        padding: 18px 20px;
        font-weight: 600;
        font-size: 15px;
        color: var(--text-primary);
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 16px;
        transition: color var(--transition);
    }

    .faq-item summary::-webkit-details-marker {
        display: none;
    }

    .faq-item summary:hover {
        color: var(--highlight);
    }

    .faq-item summary i {
        color: var(--text-muted);
        font-size: 13px;
        transition: transform var(--transition);
    }

    .faq-item[open] summary i {
        transform: rotate(180deg);
        color: var(--highlight);
    }

    .faq-answer {
        padding: 0 20px 18px;
        color: var(--text-secondary);
        font-size: 14px;
        line-height: 1.75;
    }

    /* CTA */
    .cta-box {
        background: linear-gradient(135deg, rgba(45, 226, 166, 0.12), rgba(18, 26, 36, 0.96));
        border: 1px solid var(--highlight-border);
        border-radius: var(--radius-lg);
        padding: 36px 32px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 32px;
        flex-wrap: wrap;
    }

    .cta-box h2 {
        font-size: 24px;
        font-weight: 700;
        margin: 0 0 10px;
        color: var(--text-primary);
    }

    .cta-box p {
        font-size: 14px;
        color: var(--text-secondary);
        margin: 0;
    }

    .subscribe-form {
        display: flex;
        align-items: center;
        gap: 10px;
        flex-wrap: wrap;
    }

    .subscribe-form input {
        background: var(--bg-input);
        border: 1px solid rgba(230, 237, 243, 0.16);
        border-radius: var(--radius-sm);
        padding: 11px 16px;
        color: var(--text-primary);
        min-width: 240px;
        outline: none;
        transition: border-color var(--transition);
    }

    .subscribe-form input:focus {
        border-color: var(--highlight);
    }

    .form-note {
        width: 100%;
        font-size: 12px;
        color: var(--text-muted);
        margin-top: 8px;
    }

    /* Footer */
    .site-footer {
        background: #0a0e13;
        border-top: 1px solid rgba(45, 226, 166, 0.1);
        padding: 40px 0 24px;
        color: var(--text-secondary);
    }

    .footer-top {
        display: flex;
        justify-content: space-between;
        gap: 40px;
        flex-wrap: wrap;
        margin-bottom: 24px;
    }

    .footer-brand {
        max-width: 360px;
    }

    .footer-brand .brand-logo {
        margin-bottom: 12px;
        font-size: 18px;
    }

    .footer-brand p {
        font-size: 13px;
        line-height: 1.7;
        color: var(--text-secondary);
        margin: 0;
    }

    .footer-links {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        gap: 10px 16px;
        font-size: 13px;
    }

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

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

    .footer-bottom {
        border-top: 1px solid rgba(230, 237, 243, 0.08);
        padding-top: 20px;
        display: flex;
        flex-direction: column;
        gap: 6px;
        font-size: 12px;
        color: var(--text-muted);
    }

    .footer-bottom p {
        margin: 0;
    }

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

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

    /* Responsive */
    @media (max-width: 1024px) {
        .article-grid {
            grid-template-columns: repeat(2, 1fr);
        }
        .topic-grid {
            grid-template-columns: repeat(2, 1fr);
        }
        .data-strip-grid {
            grid-template-columns: repeat(2, 1fr);
        }
        .tool-grid {
            grid-template-columns: 1fr;
            gap: 24px;
        }
        .main-nav {
            justify-content: flex-start;
        }
    }

    @media (max-width: 900px) {
        .main-nav {
            display: block;
        }
        .nav-links {
            display: none;
            position: absolute;
            top: 68px;
            left: 0;
            right: 0;
            flex-direction: column;
            align-items: stretch;
            background: rgba(13, 18, 24, 0.98);
            border-bottom: 1px solid rgba(45, 226, 166, 0.14);
            padding: 12px 16px 20px;
            gap: 2px;
            z-index: 99;
        }
        .nav-links.open {
            display: flex;
        }
        .nav-links li a {
            display: flex;
            padding: 12px 14px;
            font-size: 15px;
        }
        .nav-toggle {
            display: inline-flex;
        }
        .header-actions .command-search {
            display: none;
        }
        .header-cta {
            display: none;
        }
        .section-heading-row {
            flex-direction: column;
            align-items: flex-start;
        }
    }

    @media (max-width: 640px) {
        .page-hero {
            padding: 32px 0;
        }
        .page-hero-content h1 {
            font-size: 27px;
        }
        .article-grid {
            grid-template-columns: 1fr;
        }
        .topic-grid {
            grid-template-columns: 1fr;
        }
        .data-strip-grid {
            grid-template-columns: 1fr;
        }
        .cta-box {
            padding: 24px 20px;
        }
        .subscribe-form {
            width: 100%;
        }
        .subscribe-form input {
            min-width: 0;
            width: 100%;
        }
        .setion {
            padding: var(--spacing-lg) 0;
        }
    }

/* roulang page: category3 */
:root {
            --bg-dark: #0d1218;
            --bg-panel: #121a24;
            --bg-card: #16202b;
            --bg-input: #0f1822;
            --text-primary: #e6edf3;
            --text-secondary: #8fa3b5;
            --text-muted: #5e7387;
            --highlight: #2de2a6;
            --highlight-soft: rgba(45, 226, 166, 0.12);
            --highlight-border: rgba(45, 226, 166, 0.22);
            --purple-muted: #6d5b8f;
            --purple-soft: rgba(109, 91, 143, 0.15);
            --radius: 8px;
            --radius-sm: 6px;
            --radius-lg: 10px;
            --shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 12px 32px rgba(0, 0, 0, 0.45);
            --transition: 0.22s ease;
            --font-stack: system-ui, -apple-system, 'Segoe UI', '苹方', '微软雅黑', 'PingFang SC', 'Hiragino Sans GB', 'Source Han Sans SC', sans-serif;
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 24px;
            --spacing-lg: 40px;
            --spacing-xl: 56px;
            --spacing-xxl: 72px;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-stack);
            background-color: var(--bg-dark);
            color: var(--text-primary);
            font-size: 15px;
            line-height: 1.7;
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--highlight);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: #5ff0bc;
        }
        a:focus-visible {
            outline: 2px solid var(--highlight);
            outline-offset: 3px;
            border-radius: 2px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea,
        select {
            font-family: var(--font-stack);
            font-size: 15px;
        }
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--highlight);
            outline-offset: 2px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }
        .section {
            padding: var(--spacing-xl) 0;
        }
        .section--compact {
            padding: var(--spacing-lg) 0;
        }
        .section--dark-alt {
            background-color: var(--bg-panel);
        }
        .section--darker {
            background-color: #0a0e13;
        }
        .section-title {
            font-size: 26px;
            font-weight: 700;
            line-height: 1.35;
            margin-bottom: 12px;
            color: var(--text-primary);
            letter-spacing: 0.5px;
        }
        .section-subtitle {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.75;
            max-width: 680px;
            margin-bottom: var(--spacing-md);
        }
        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 1.2px;
            color: var(--highlight);
            background: var(--highlight-soft);
            padding: 6px 14px;
            border-radius: 20px;
            margin-bottom: 14px;
            border: 1px solid var(--highlight-border);
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 600;
            font-size: 15px;
            padding: 12px 26px;
            border-radius: var(--radius-sm);
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
            letter-spacing: 0.3px;
            line-height: 1.2;
        }
        .btn-primary {
            background-color: var(--highlight);
            color: #0a1410;
            border: 1px solid var(--highlight);
        }
        .btn-primary:hover {
            background-color: #5ff0bc;
            border-color: #5ff0bc;
            color: #0a1410;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(45, 226, 166, 0.25);
        }
        .btn-secondary {
            background: transparent;
            color: var(--text-primary);
            border: 1px solid rgba(230, 237, 243, 0.3);
        }
        .btn-secondary:hover {
            border-color: var(--highlight);
            color: var(--highlight);
            background: var(--highlight-soft);
            transform: translateY(-2px);
        }
        .btn-sm {
            padding: 9px 18px;
            font-size: 13px;
        }
        .card {
            background: var(--bg-card);
            border: 1px solid rgba(45, 226, 166, 0.12);
            border-radius: var(--radius);
            padding: var(--spacing-md);
            transition: all var(--transition);
            box-shadow: none;
        }
        .card:hover {
            border-color: var(--highlight-border);
            box-shadow: var(--shadow);
            transform: translateY(-3px);
        }
        .card-title {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .card-text {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 0;
        }
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 12px;
            font-weight: 500;
            padding: 4px 12px;
            border-radius: 16px;
            background: var(--highlight-soft);
            color: var(--highlight);
            border: 1px solid var(--highlight-border);
        }
        /* Header / Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(13, 18, 24, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(45, 226, 166, 0.1);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            padding: 14px 0;
            flex-wrap: nowrap;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }
        .brand-logo:hover {
            color: var(--highlight);
        }
        .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            border-radius: 6px;
            background: var(--highlight);
            color: #0a1410;
            font-size: 14px;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
            flex-wrap: wrap;
        }
        .nav-links li a {
            display: inline-block;
            padding: 8px 14px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            white-space: nowrap;
        }
        .nav-links li a:hover {
            color: var(--highlight);
            background: var(--highlight-soft);
        }
        .nav-links li a.active {
            color: var(--highlight);
            background: var(--highlight-soft);
            border: 1px solid var(--highlight-border);
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .search-box {
            display: flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(230, 237, 243, 0.15);
            border-radius: var(--radius-sm);
            padding: 8px 14px;
            transition: border-color var(--transition);
        }
        .search-box:focus-within {
            border-color: var(--highlight);
        }
        .search-box input {
            background: transparent;
            border: none;
            outline: none;
            color: var(--text-primary);
            font-size: 13px;
            width: 140px;
        }
        .search-box input::placeholder {
            color: var(--text-muted);
        }
        .search-box i {
            color: var(--text-muted);
            font-size: 13px;
        }
        .nav-toggle {
            display: none;
            background: transparent;
            border: 1px solid rgba(230, 237, 243, 0.2);
            color: var(--text-primary);
            font-size: 18px;
            padding: 8px 12px;
            border-radius: var(--radius-sm);
            cursor: pointer;
        }
        /* Breadcrumb */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 10px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--text-secondary);
        }
        .breadcrumb a:hover {
            color: var(--highlight);
        }
        .breadcrumb .sep {
            color: var(--text-muted);
            font-size: 11px;
        }
        .breadcrumb .current {
            color: var(--highlight);
        }
        /* Category Hero */
        .category-hero {
            padding: 36px 0 24px;
            background: linear-gradient(180deg, #0a0e13 0%, var(--bg-dark) 100%);
            border-bottom: 1px solid rgba(45, 226, 166, 0.08);
        }
        .category-hero h1 {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
            letter-spacing: 0.5px;
            line-height: 1.3;
        }
        .category-hero .hero-desc {
            font-size: 15px;
            color: var(--text-secondary);
            max-width: 720px;
            line-height: 1.75;
            margin-bottom: 0;
        }
        /* Service Cards Grid - Asymmetric */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(12, 1fr);
            gap: 20px;
        }
        .service-card {
            background: var(--bg-card);
            border: 1px solid rgba(45, 226, 166, 0.12);
            border-radius: var(--radius);
            padding: var(--spacing-md);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .service-card:hover {
            border-color: var(--highlight-border);
            box-shadow: var(--shadow);
            transform: translateY(-3px);
        }
        .service-card .service-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 8px;
            background: var(--highlight-soft);
            color: var(--highlight);
            font-size: 18px;
            border: 1px solid var(--highlight-border);
            flex-shrink: 0;
        }
        .service-card .card-title {
            font-size: 16px;
            margin-bottom: 4px;
        }
        .service-card .card-text {
            font-size: 13px;
            flex-grow: 1;
        }
        .service-card .service-meta {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 12px;
            color: var(--text-muted);
            border-top: 1px solid rgba(230, 237, 243, 0.08);
            padding-top: 12px;
        }
        .service-card.col-span-4 {
            grid-column: span 4;
        }
        .service-card.col-span-6 {
            grid-column: span 6;
        }
        .service-card.col-span-8 {
            grid-column: span 8;
        }
        .service-card.col-span-3 {
            grid-column: span 3;
        }
        .service-card.featured-card {
            background: linear-gradient(135deg, rgba(45, 226, 166, 0.08) 0%, var(--bg-card) 60%);
            border-color: var(--highlight-border);
        }
        .service-card.featured-card .card-title {
            font-size: 18px;
        }
        /* Data Snapshot Panel */
        .data-snapshot {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }
        .snapshot-item {
            background: var(--bg-card);
            border: 1px solid rgba(45, 226, 166, 0.1);
            border-radius: var(--radius);
            padding: 18px 20px;
            text-align: center;
            transition: all var(--transition);
        }
        .snapshot-item:hover {
            border-color: var(--highlight-border);
            box-shadow: var(--shadow);
        }
        .snapshot-number {
            font-size: 28px;
            font-weight: 700;
            color: var(--highlight);
            line-height: 1.2;
            font-variant-numeric: tabular-nums;
        }
        .snapshot-label {
            font-size: 13px;
            color: var(--text-secondary);
            margin-top: 6px;
        }
        /* Content List Cards */
        .content-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .content-item {
            display: flex;
            gap: 16px;
            background: var(--bg-card);
            border: 1px solid rgba(45, 226, 166, 0.1);
            border-radius: var(--radius);
            padding: 16px;
            transition: all var(--transition);
            align-items: center;
        }
        .content-item:hover {
            border-color: var(--highlight-border);
            box-shadow: var(--shadow);
            transform: translateY(-2px);
        }
        .content-item-img {
            width: 120px;
            height: 80px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            flex-shrink: 0;
            background: var(--bg-input);
        }
        .content-item-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .content-item-body {
            flex: 1;
            min-width: 0;
        }
        .content-item-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 4px;
            line-height: 1.4;
        }
        .content-item-desc {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .content-item-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 4px;
        }
        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid rgba(45, 226, 166, 0.1);
            border-radius: var(--radius);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: var(--highlight-border);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            padding: 16px 20px;
            cursor: pointer;
            font-weight: 600;
            font-size: 15px;
            color: var(--text-primary);
            user-select: none;
            transition: color var(--transition);
        }
        .faq-question:hover {
            color: var(--highlight);
        }
        .faq-question i {
            font-size: 14px;
            color: var(--text-muted);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--highlight);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            padding: 0 20px;
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.75;
            transition: max-height 0.3s ease, padding 0.3s ease;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 20px 16px;
        }
        /* Form */
        .custom-form {
            background: var(--bg-card);
            border: 1px solid rgba(45, 226, 166, 0.12);
            border-radius: var(--radius-lg);
            padding: var(--spacing-lg);
        }
        .custom-form label {
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            margin-bottom: 6px;
            display: block;
        }
        .custom-form input,
        .custom-form textarea {
            background: var(--bg-input);
            border: 1px solid rgba(230, 237, 243, 0.15);
            border-radius: var(--radius-sm);
            color: var(--text-primary);
            padding: 10px 14px;
            font-size: 14px;
            width: 100%;
            transition: border-color var(--transition);
            margin-bottom: 16px;
        }
        .custom-form input:focus,
        .custom-form textarea:focus {
            border-color: var(--highlight);
            outline: none;
            box-shadow: 0 0 0 3px rgba(45, 226, 166, 0.08);
        }
        .custom-form textarea {
            min-height: 100px;
            resize: vertical;
        }
        .form-trust {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 12px;
        }
        .form-trust span {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .form-trust i {
            color: var(--highlight);
            font-size: 11px;
        }
        /* Footer */
        .site-footer {
            background: #0a0e13;
            border-top: 1px solid rgba(45, 226, 166, 0.08);
            padding: var(--spacing-xl) 0 var(--spacing-md);
        }
        .footer-top {
            display: grid;
            grid-template-columns: 2fr 3fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-brand .brand-logo {
            font-size: 16px;
            margin-bottom: 10px;
        }
        .footer-brand p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-links {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 12px;
        }
        .footer-links a {
            font-size: 13px;
            color: var(--text-secondary);
            transition: color var(--transition);
            display: inline-block;
        }
        .footer-links a:hover {
            color: var(--highlight);
        }
        .footer-bottom {
            border-top: 1px solid rgba(230, 237, 243, 0.06);
            padding-top: 20px;
            display: flex;
            flex-direction: column;
            gap: 8px;
            font-size: 12px;
            color: var(--text-muted);
            align-items: center;
            text-align: center;
        }
        .footer-bottom p {
            margin: 0;
        }
        .footer-bottom a {
            color: var(--text-secondary);
            font-size: 12px;
        }
        .footer-bottom a:hover {
            color: var(--highlight);
        }
        /* Responsive */
        @media (max-width: 1024px) {
            .header-inner {
                flex-wrap: wrap;
                gap: 10px;
            }
            .nav-links {
                order: 3;
                width: 100%;
                justify-content: center;
            }
            .nav-links li a {
                padding: 6px 10px;
                font-size: 13px;
            }
            .search-box input {
                width: 100px;
            }
            .services-grid {
                gap: 16px;
            }
            .service-card.col-span-4,
            .service-card.col-span-6,
            .service-card.col-span-8,
            .service-card.col-span-3 {
                grid-column: span 6;
            }
            .data-snapshot {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-top {
                grid-template-columns: 1fr;
            }
            .footer-links {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            .header-inner {
                flex-wrap: nowrap;
            }
            .nav-links {
                display: none;
                order: unset;
                width: auto;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: var(--bg-panel);
                border-bottom: 1px solid rgba(45, 226, 166, 0.15);
                flex-direction: column;
                gap: 0;
                padding: 12px 20px;
                box-shadow: var(--shadow);
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links li {
                width: 100%;
            }
            .nav-links li a {
                display: block;
                padding: 10px 12px;
                font-size: 15px;
            }
            .nav-toggle {
                display: inline-flex;
                align-items: center;
                justify-content: center;
            }
            .search-box input {
                width: 80px;
            }
            .header-actions .btn {
                display: none;
            }
            .category-hero h1 {
                font-size: 26px;
            }
            .service-card.col-span-4,
            .service-card.col-span-6,
            .service-card.col-span-8,
            .service-card.col-span-3 {
                grid-column: span 12;
            }
            .data-snapshot {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .snapshot-number {
                font-size: 22px;
            }
            .content-item {
                flex-direction: column;
                align-items: flex-start;
            }
            .content-item-img {
                width: 100%;
                height: 140px;
            }
            .footer-links {
                grid-template-columns: 1fr 1fr;
            }
            .section {
                padding: var(--spacing-lg) 0;
            }
        }
        @media (max-width: 520px) {
            .data-snapshot {
                grid-template-columns: 1fr;
            }
            .footer-links {
                grid-template-columns: 1fr;
            }
            .category-hero h1 {
                font-size: 22px;
            }
            .breadcrumb {
                font-size: 12px;
            }
            .form-trust {
                flex-direction: column;
                gap: 8px;
            }
        }

/* roulang page: category5 */
:root {
            --bg-dark: #0d1218;
            --bg-panel: #121a24;
            --bg-card: #16202b;
            --bg-input: #0f1822;
            --text-primary: #e6edf3;
            --text-secondary: #8fa3b5;
            --text-muted: #5e7387;
            --highlight: #2de2a6;
            --highlight-soft: rgba(45, 226, 166, 0.12);
            --highlight-border: rgba(45, 226, 166, 0.22);
            --purple-muted: #6d5b8f;
            --purple-soft: rgba(109, 91, 143, 0.15);
            --radius: 8px;
            --radius-sm: 6px;
            --radius-lg: 10px;
            --shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 12px 32px rgba(0, 0, 0, 0.45);
            --transition: 0.22s ease;
            --font-stack: system-ui, -apple-system, 'Segoe UI', '苹方', '微软雅黑', 'PingFang SC', 'Hiragino Sans GB', 'Source Han Sans SC', sans-serif;
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 24px;
            --spacing-lg: 40px;
            --spacing-xl: 56px;
            --spacing-xxl: 72px;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-stack);
            background-color: var(--bg-dark);
            color: var(--text-primary);
            font-size: 15px;
            line-height: 1.7;
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--highlight);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: #5ff0bc;
        }
        a:focus-visible {
            outline: 2px solid var(--highlight);
            outline-offset: 3px;
            border-radius: 2px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea,
        select {
            font-family: var(--font-stack);
            font-size: 15px;
        }
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--highlight);
            outline-offset: 2px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }
        .section {
            padding: var(--spacing-xl) 0;
        }
        .section--compact {
            padding: var(--spacing-lg) 0;
        }
        .section--dark-alt {
            background-color: var(--bg-panel);
        }
        .section--darker {
            background-color: #0a0e13;
        }
        .section-title {
            font-size: 26px;
            font-weight: 700;
            line-height: 1.35;
            margin-bottom: 12px;
            color: var(--text-primary);
            letter-spacing: 0.5px;
        }
        .section-subtitle {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.75;
            max-width: 680px;
            margin-bottom: var(--spacing-md);
        }
        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 1.2px;
            color: var(--highlight);
            background: var(--highlight-soft);
            padding: 6px 14px;
            border-radius: 20px;
            margin-bottom: 14px;
            border: 1px solid var(--highlight-border);
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 600;
            font-size: 15px;
            padding: 12px 26px;
            border-radius: var(--radius-sm);
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
            letter-spacing: 0.3px;
            line-height: 1.2;
        }
        .btn-primary {
            background-color: var(--highlight);
            color: #0a1410;
            border: 1px solid var(--highlight);
        }
        .btn-primary:hover {
            background-color: #5ff0bc;
            border-color: #5ff0bc;
            color: #0a1410;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(45, 226, 166, 0.25);
        }
        .btn-secondary {
            background: transparent;
            color: var(--text-primary);
            border: 1px solid rgba(230, 237, 243, 0.3);
        }
        .btn-secondary:hover {
            border-color: var(--highlight);
            color: var(--highlight);
            background: var(--highlight-soft);
            transform: translateY(-2px);
        }
        .btn-sm {
            padding: 9px 18px;
            font-size: 13px;
        }
        .card {
            background: var(--bg-card);
            border: 1px solid rgba(45, 226, 166, 0.12);
            border-radius: var(--radius);
            padding: var(--spacing-md);
            transition: all var(--transition);
            box-shadow: none;
        }
        .card:hover {
            border-color: var(--highlight-border);
            box-shadow: var(--shadow);
            transform: translateY(-3px);
        }
        .card-title {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .card-text {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 0;
        }
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 12px;
            font-weight: 500;
            padding: 4px 10px;
            border-radius: 12px;
            background: var(--highlight-soft);
            color: var(--highlight);
            border: 1px solid var(--highlight-border);
        }
        .badge--muted {
            background: rgba(143, 163, 181, 0.12);
            color: var(--text-secondary);
            border-color: rgba(143, 163, 181, 0.22);
        }
        .tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 500;
            padding: 3px 10px;
            border-radius: 4px;
            background: var(--purple-soft);
            color: #c4b5e0;
            margin-right: 6px;
            margin-bottom: 6px;
        }
        /* Header/Nav */
        .site-header {
            background: rgba(13, 18, 24, 0.95);
            border-bottom: 1px solid rgba(45, 226, 166, 0.1);
            padding: 16px 0;
            position: sticky;
            top: 0;
            z-index: 100;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: nowrap;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            white-space: nowrap;
            letter-spacing: 0.5px;
        }
        .brand-logo:hover {
            color: var(--highlight);
        }
        .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 8px;
            background: var(--highlight-soft);
            border: 1px solid var(--highlight-border);
            color: var(--highlight);
            font-size: 16px;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
            flex-wrap: nowrap;
        }
        .nav-links a {
            display: inline-block;
            padding: 8px 14px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 6px;
            white-space: nowrap;
            transition: all var(--transition);
        }
        .nav-links a:hover {
            color: var(--text-primary);
            background: rgba(45, 226, 166, 0.08);
        }
        .nav-links a.active {
            color: var(--highlight);
            background: var(--highlight-soft);
            border: 1px solid var(--highlight-border);
        }
        .header-right {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .nav-search {
            display: flex;
            align-items: center;
            gap: 8px;
            background: var(--bg-input);
            border: 1px solid rgba(143, 163, 181, 0.2);
            border-radius: 6px;
            padding: 8px 14px;
            color: var(--text-muted);
            font-size: 13px;
            white-space: nowrap;
            cursor: pointer;
            transition: border-color var(--transition);
        }
        .nav-search:hover {
            border-color: var(--highlight-border);
        }
        .nav-search i {
            font-size: 13px;
        }
        .nav-toggle {
            display: none;
            background: transparent;
            border: 1px solid rgba(143, 163, 181, 0.3);
            border-radius: 6px;
            color: var(--text-primary);
            font-size: 20px;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            cursor: pointer;
        }
        .header-cta {
            white-space: nowrap;
        }
        /* Breadcrumb */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-secondary);
            margin-bottom: 12px;
        }
        .breadcrumb a {
            color: var(--text-secondary);
            transition: color var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--highlight);
        }
        .breadcrumb .sep {
            color: var(--text-muted);
            font-size: 11px;
        }
        .breadcrumb .current {
            color: var(--highlight);
            font-weight: 500;
        }
        /* Category Hero */
        .category-hero {
            background: var(--bg-panel);
            padding: 40px 0 32px;
            border-bottom: 1px solid rgba(45, 226, 166, 0.08);
        }
        .category-hero h1 {
            font-size: 34px;
            font-weight: 700;
            margin: 0 0 14px;
            line-height: 1.25;
            letter-spacing: 0.5px;
            color: var(--text-primary);
        }
        .category-hero .hero-desc {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.75;
            max-width: 720px;
            margin: 0;
        }
        /* Intro Panel */
        .intro-panel {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: var(--spacing-md);
            align-items: start;
        }
        .intro-text {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin: 0;
        }
        .intro-text strong {
            color: var(--text-primary);
            font-weight: 600;
        }
        .intro-highlight-box {
            background: var(--bg-card);
            border: 1px solid var(--highlight-border);
            border-radius: var(--radius);
            padding: var(--spacing-md);
            text-align: center;
        }
        .intro-highlight-box .big-num {
            font-size: 36px;
            font-weight: 700;
            color: var(--highlight);
            line-height: 1.2;
            margin-bottom: 4px;
            font-variant-numeric: tabular-nums;
        }
        .intro-highlight-box .label {
            font-size: 13px;
            color: var(--text-secondary);
        }
        /* Data Mini Board */
        .mini-stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-sm);
        }
        .mini-stat {
            background: var(--bg-card);
            border: 1px solid rgba(45, 226, 166, 0.1);
            border-radius: var(--radius);
            padding: var(--spacing-sm);
            text-align: center;
        }
        .mini-stat .stat-value {
            font-size: 28px;
            font-weight: 700;
            color: var(--highlight);
            line-height: 1.25;
            font-variant-numeric: tabular-nums;
        }
        .mini-stat .stat-label {
            font-size: 13px;
            color: var(--text-secondary);
            margin-top: 4px;
        }
        /* Strategy List */
        .strategy-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--spacing-md);
        }
        .strategy-card {
            background: var(--bg-card);
            border: 1px solid rgba(45, 226, 166, 0.1);
            border-radius: var(--radius);
            overflow: hidden;
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .strategy-card:hover {
            border-color: var(--highlight-border);
            box-shadow: var(--shadow);
            transform: translateY(-3px);
        }
        .strategy-card-img {
            height: 200px;
            overflow: hidden;
            position: relative;
        }
        .strategy-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .strategy-card:hover .strategy-card-img img {
            transform: scale(1.05);
        }
        .strategy-card-body {
            padding: var(--spacing-md);
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .strategy-card-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 10px;
            font-size: 12px;
            color: var(--text-muted);
        }
        .strategy-card-title {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.4;
            margin-bottom: 10px;
        }
        .strategy-card-text {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            flex: 1;
            margin-bottom: 12px;
        }
        .strategy-card-link {
            font-size: 14px;
            font-weight: 500;
            color: var(--highlight);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: all var(--transition);
        }
        .strategy-card-link:hover {
            color: #5ff0bc;
            gap: 10px;
        }
        /* Related Topics */
        .topics-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-sm);
        }
        .topic-card {
            background: var(--bg-card);
            border: 1px solid rgba(45, 226, 166, 0.1);
            border-radius: var(--radius);
            padding: var(--spacing-sm);
            text-align: center;
            transition: all var(--transition);
        }
        .topic-card:hover {
            border-color: var(--highlight-border);
            transform: translateY(-2px);
        }
        .topic-card i {
            font-size: 26px;
            color: var(--highlight);
            margin-bottom: 8px;
        }
        .topic-card-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 4px;
        }
        .topic-card-text {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.65;
            margin: 0;
        }
        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid rgba(45, 226, 166, 0.1);
            border-radius: var(--radius);
            overflow: hidden;
            transition: border-color var(--transition);
        }
        .faq-item:hover {
            border-color: var(--highlight-border);
        }
        .faq-question {
            width: 100%;
            background: transparent;
            border: none;
            padding: 18px 20px;
            text-align: left;
            color: var(--text-primary);
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            transition: color var(--transition);
        }
        .faq-question:hover {
            color: var(--highlight);
        }
        .faq-question .faq-icon {
            color: var(--highlight);
            font-size: 14px;
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.is-open .faq-question .faq-icon {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 20px 18px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            display: none;
        }
        .faq-item.is-open .faq-answer {
            display: block;
        }
        /* CTA / Form */
        .cta-section {
            background: var(--bg-panel);
            border: 1px solid rgba(45, 226, 166, 0.15);
            border-radius: var(--radius-lg);
            padding: var(--spacing-lg);
        }
        .cta-section .section-title {
            margin-bottom: 8px;
        }
        .cta-form {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-sm);
            margin-top: var(--spacing-md);
        }
        .cta-form .form-group {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .cta-form .full-width {
            grid-column: 1 / -1;
        }
        .cta-form label {
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
        }
        .cta-form input,
        .cta-form textarea {
            background: var(--bg-input);
            border: 1px solid rgba(143, 163, 181, 0.25);
            border-radius: var(--radius-sm);
            padding: 12px 16px;
            color: var(--text-primary);
            font-size: 14px;
            transition: border-color var(--transition), box-shadow var(--transition);
        }
        .cta-form input:focus,
        .cta-form textarea:focus {
            border-color: var(--highlight);
            box-shadow: 0 0 0 3px rgba(45, 226, 166, 0.15);
            outline: none;
        }
        .cta-form textarea {
            min-height: 100px;
            resize: vertical;
        }
        .form-hint {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 12px;
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }
        .form-hint i {
            color: var(--highlight);
            font-size: 12px;
        }
        /* Footer */
        .site-footer {
            background: #0a0e13;
            border-top: 1px solid rgba(45, 226, 166, 0.1);
            padding: var(--spacing-lg) 0 0;
            margin-top: 0;
        }
        .footer-top {
            display: grid;
            grid-template-columns: 1fr 2fr;
            gap: var(--spacing-lg);
            padding-bottom: var(--spacing-md);
            border-bottom: 1px solid rgba(143, 163, 181, 0.1);
        }
        .footer-brand .brand-logo {
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
            max-width: 320px;
        }
        .footer-links {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 10px;
        }
        .footer-links a {
            font-size: 13px;
            color: var(--text-secondary);
            transition: color var(--transition);
        }
        .footer-links a:hover {
            color: var(--highlight);
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
            padding: var(--spacing-sm) 0 var(--spacing-md);
            font-size: 12px;
            color: var(--text-muted);
        }
        .footer-bottom a {
            color: var(--text-muted);
            font-size: 12px;
        }
        .footer-bottom a:hover {
            color: var(--highlight);
        }
        /* Responsive */
        @media (max-width: 1024px) {
            .nav-links {
                gap: 2px;
            }
            .nav-links a {
                padding: 8px 10px;
                font-size: 13px;
            }
            .header-cta .btn {
                padding: 10px 16px;
                font-size: 13px;
            }
            .nav-search span {
                display: none;
            }
            .mini-stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .topics-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .intro-panel {
                grid-template-columns: 1fr;
            }
            .footer-top {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 768px) {
            .nav-links {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: var(--bg-dark);
                flex-direction: column;
                padding: var(--spacing-sm);
                border-bottom: 1px solid var(--highlight-border);
            }
            .nav-links.is-open {
                display: flex;
            }
            .nav-toggle {
                display: flex;
            }
            .site-header {
                position: relative;
            }
            .header-right {
                gap: 8px;
            }
            .header-cta {
                display: none;
            }
            .category-hero h1 {
                font-size: 28px;
            }
            .strategy-list {
                grid-template-columns: 1fr;
            }
            .topics-grid {
                grid-template-columns: 1fr;
            }
            .cta-form {
                grid-template-columns: 1fr;
            }
            .cta-form .full-width {
                grid-column: auto;
            }
            .footer-links {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                align-items: center;
            }
        }
        @media (max-width: 520px) {
            .section {
                padding: var(--spacing-lg) 0;
            }
            .category-hero h1 {
                font-size: 24px;
            }
            .strategy-card-img {
                height: 160px;
            }
            .mini-stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 8px;
            }
            .mini-stat .stat-value {
                font-size: 22px;
            }
            .footer-links {
                grid-template-columns: 1fr 1fr;
                gap: 6px;
            }
            .footer-bottom {
                font-size: 11px;
            }
        }

/* roulang page: category4 */
:root {
            --bg-dark: #0d1218;
            --bg-panel: #121a24;
            --bg-card: #16202b;
            --bg-input: #0f1822;
            --text-primary: #e6edf3;
            --text-secondary: #8fa3b5;
            --text-muted: #5e7387;
            --highlight: #2de2a6;
            --highlight-soft: rgba(45, 226, 166, 0.12);
            --highlight-border: rgba(45, 226, 166, 0.22);
            --purple-muted: #6d5b8f;
            --purple-soft: rgba(109, 91, 143, 0.15);
            --radius: 8px;
            --radius-sm: 6px;
            --radius-lg: 10px;
            --shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 12px 32px rgba(0, 0, 0, 0.45);
            --transition: 0.22s ease;
            --font-stack: system-ui, -apple-system, 'Segoe UI', '苹方', '微软雅黑', 'PingFang SC', 'Hiragino Sans GB', 'Source Han Sans SC', sans-serif;
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 24px;
            --spacing-lg: 40px;
            --spacing-xl: 56px;
            --spacing-xxl: 72px;
        }

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

        body {
            font-family: var(--font-stack);
            background-color: var(--bg-dark);
            color: var(--text-primary);
            font-size: 15px;
            line-height: 1.7;
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        a {
            color: var(--highlight);
            text-decoration: none;
            transition: color var(--transition);
        }

        a:hover {
            color: #5ff0bc;
        }

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

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

        button,
        input,
        textarea,
        select {
            font-family: var(--font-stack);
            font-size: 15px;
        }

        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--highlight);
            outline-offset: 2px;
        }

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

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        .section {
            padding: var(--spacing-xl) 0;
        }

        .section--compact {
            padding: var(--spacing-lg) 0;
        }

        .section--dark-alt {
            background-color: var(--bg-panel);
        }

        .section--darker {
            background-color: #0a0e13;
        }

        .section-title {
            font-size: 26px;
            font-weight: 700;
            line-height: 1.35;
            margin-bottom: 12px;
            color: var(--text-primary);
            letter-spacing: 0.5px;
        }

        .section-subtitle {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.75;
            max-width: 680px;
            margin-bottom: var(--spacing-md);
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 1.2px;
            color: var(--highlight);
            background: var(--highlight-soft);
            padding: 6px 14px;
            border-radius: 20px;
            margin-bottom: 14px;
            border: 1px solid var(--highlight-border);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 600;
            font-size: 15px;
            padding: 12px 26px;
            border-radius: var(--radius-sm);
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
            letter-spacing: 0.3px;
            line-height: 1.2;
        }

        .btn-primary {
            background-color: var(--highlight);
            color: #0a1410;
            border: 1px solid var(--highlight);
        }

        .btn-primary:hover {
            background-color: #5ff0bc;
            border-color: #5ff0bc;
            color: #0a1410;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(45, 226, 166, 0.25);
        }

        .btn-secondary {
            background: transparent;
            color: var(--text-primary);
            border: 1px solid rgba(230, 237, 243, 0.3);
        }

        .btn-secondary:hover {
            border-color: var(--highlight);
            color: var(--highlight);
            background: var(--highlight-soft);
            transform: translateY(-2px);
        }

        .btn-sm {
            padding: 9px 18px;
            font-size: 13px;
        }

        .card {
            background: var(--bg-card);
            border: 1px solid rgba(45, 226, 166, 0.12);
            border-radius: var(--radius);
            padding: var(--spacing-md);
            transition: all var(--transition);
            box-shadow: none;
        }

        .card:hover {
            border-color: var(--highlight-border);
            box-shadow: var(--shadow);
            transform: translateY(-3px);
        }

        .card-title {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .card-text {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 0;
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 12px;
            font-weight: 500;
            padding: 4px 12px;
            border-radius: 20px;
            background: var(--highlight-soft);
            color: var(--highlight);
            border: 1px solid var(--highlight-border);
            white-space: nowrap;
        }

        .badge--muted {
            background: rgba(143, 163, 181, 0.12);
            color: var(--text-secondary);
            border-color: rgba(143, 163, 181, 0.2);
        }

        /* Header & Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background-color: rgba(13, 18, 24, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(45, 226, 166, 0.1);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: var(--spacing-md);
            padding-top: 12px;
            padding-bottom: 12px;
        }

        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.5px;
            text-decoration: none;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .brand-logo:hover {
            color: var(--highlight);
        }

        .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            background: var(--highlight-soft);
            border: 1px solid var(--highlight-border);
            border-radius: var(--radius-sm);
            color: var(--highlight);
            font-size: 15px;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-links li {
            margin: 0;
        }

        .nav-links a {
            display: block;
            padding: 8px 14px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            white-space: nowrap;
            text-decoration: none;
        }

        .nav-links a:hover {
            color: var(--text-primary);
            background: rgba(230, 237, 243, 0.06);
        }

        .nav-links a.active {
            color: var(--highlight);
            background: var(--highlight-soft);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .search-box {
            display: flex;
            align-items: center;
            gap: 8px;
            background: rgba(230, 237, 243, 0.06);
            border: 1px solid rgba(230, 237, 243, 0.12);
            border-radius: var(--radius-sm);
            padding: 7px 14px;
            min-width: 180px;
            transition: all var(--transition);
        }

        .search-box:focus-within {
            border-color: var(--highlight-border);
            background: rgba(45, 226, 166, 0.05);
        }

        .search-box i {
            color: var(--text-muted);
            font-size: 13px;
        }

        .search-box input {
            background: transparent;
            border: none;
            outline: none;
            color: var(--text-primary);
            font-size: 13px;
            width: 100%;
            padding: 0;
        }

        .search-box input::placeholder {
            color: var(--text-muted);
        }

        .mobile-toggle {
            display: none;
            background: transparent;
            border: 1px solid rgba(230, 237, 243, 0.2);
            color: var(--text-primary);
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            cursor: pointer;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            transition: all var(--transition);
        }

        .mobile-toggle:hover {
            border-color: var(--highlight);
            color: var(--highlight);
        }

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

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

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

        .breadcrumb .separator {
            color: var(--text-muted);
            font-size: 11px;
        }

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

        /* Page Hero (分类页头) */
        .page-hero {
            padding: var(--spacing-lg) 0 var(--spacing-md);
            background-color: var(--bg-panel);
            border-bottom: 1px solid rgba(45, 226, 166, 0.08);
        }

        .page-hero h1 {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 12px 0;
            line-height: 1.3;
            letter-spacing: 0.5px;
        }

        .page-hero .hero-subtitle {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.75;
            max-width: 720px;
            margin: 0;
        }

        /* Intro Section */
        .intro-panel {
            background: var(--bg-card);
            border: 1px solid rgba(45, 226, 166, 0.1);
            border-radius: var(--radius-lg);
            padding: var(--spacing-md);
            margin-top: var(--spacing-sm);
        }

        .intro-panel p {
            color: var(--text-secondary);
            font-size: 14.5px;
            line-height: 1.8;
            margin-bottom: 10px;
        }

        .intro-panel p:last-child {
            margin-bottom: 0;
        }

        /* Stats mini board */
        .stats-mini-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-sm);
            margin-top: var(--spacing-sm);
        }

        .stat-mini-item {
            background: var(--bg-card);
            border: 1px solid rgba(45, 226, 166, 0.12);
            border-radius: var(--radius);
            padding: 18px 16px;
            text-align: left;
            transition: all var(--transition);
        }

        .stat-mini-item:hover {
            border-color: var(--highlight-border);
            transform: translateY(-2px);
        }

        .stat-mini-number {
            font-size: 28px;
            font-weight: 700;
            color: var(--highlight);
            line-height: 1.2;
            font-variant-numeric: tabular-nums;
            letter-spacing: 0.5px;
        }

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

        /* News List Cards */
        .news-list-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-md);
        }

        .news-card {
            background: var(--bg-card);
            border: 1px solid rgba(45, 226, 166, 0.12);
            border-radius: var(--radius);
            overflow: hidden;
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }

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

        .news-card-image {
            position: relative;
            width: 100%;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background-color: var(--bg-panel);
        }

        .news-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .news-card:hover .news-card-image img {
            transform: scale(1.05);
        }

        .news-card-image .badge-overlay {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(13, 18, 24, 0.85);
            color: var(--highlight);
            font-size: 11px;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 20px;
            letter-spacing: 0.5px;
            border: 1px solid var(--highlight-border);
        }

        .news-card-body {
            padding: var(--spacing-md);
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .news-card-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 8px;
        }

        .news-card-meta .divider {
            width: 3px;
            height: 3px;
            background: var(--text-muted);
            border-radius: 50%;
        }

        .news-card-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.45;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-card-excerpt {
            font-size: 13.5px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 12px;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-card-link {
            margin-top: auto;
            font-size: 13px;
            font-weight: 500;
            color: var(--highlight);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap var(--transition);
        }

        .news-card-link:hover {
            gap: 8px;
            color: #5ff0bc;
        }

        .view-more-wrapper {
            text-align: center;
            margin-top: var(--spacing-md);
        }

        /* Topics */
        .topics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-sm);
        }

        .topic-card {
            background: var(--bg-card);
            border: 1px solid rgba(45, 226, 166, 0.1);
            border-radius: var(--radius);
            padding: 18px 16px;
            transition: all var(--transition);
            text-decoration: none;
            display: block;
        }

        .topic-card:hover {
            border-color: var(--highlight-border);
            background: var(--highlight-soft);
            transform: translateY(-2px);
        }

        .topic-card-icon {
            font-size: 20px;
            color: var(--highlight);
            margin-bottom: 8px;
        }

        .topic-card-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 4px;
        }

        .topic-card-desc {
            font-size: 12.5px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* Featured content */
        .featured-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--spacing-md);
        }

        .featured-item {
            display: flex;
            gap: var(--spacing-sm);
            background: var(--bg-card);
            border: 1px solid rgba(45, 226, 166, 0.1);
            border-radius: var(--radius);
            padding: 14px;
            transition: all var(--transition);
            text-decoration: none;
            align-items: center;
        }

        .featured-item:hover {
            border-color: var(--highlight-border);
            transform: translateY(-2px);
            box-shadow: var(--shadow);
        }

        .featured-item-thumb {
            width: 72px;
            height: 72px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            flex-shrink: 0;
            background: var(--bg-panel);
        }

        .featured-item-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .featured-item-info {
            flex: 1;
        }

        .featured-item-title {
            font-size: 14.5px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 4px;
            line-height: 1.4;
        }

        .featured-item-date {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* Subscribe */
        .subscribe-panel {
            background: var(--bg-panel);
            border: 1px solid rgba(45, 226, 166, 0.1);
            border-radius: var(--radius-lg);
            padding: var(--spacing-md);
            display: flex;
            flex-wrap: wrap;
            gap: var(--spacing-sm);
            align-items: center;
            justify-content: space-between;
        }

        .subscribe-info h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--text-primary);
            margin: 0 0 6px 0;
        }

        .subscribe-info p {
            font-size: 13.5px;
            color: var(--text-secondary);
            margin: 0;
        }

        .subscribe-form {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }

        .subscribe-form input {
            background: var(--bg-input);
            border: 1px solid rgba(230, 237, 243, 0.15);
            border-radius: var(--radius-sm);
            padding: 10px 16px;
            color: var(--text-primary);
            font-size: 14px;
            min-width: 220px;
            transition: all var(--transition);
        }

        .subscribe-form input:focus {
            border-color: var(--highlight);
            outline: none;
            box-shadow: 0 0 0 2px rgba(45, 226, 166, 0.15);
        }

        .subscribe-form input::placeholder {
            color: var(--text-muted);
        }

        /* CTA */
        .cta-panel {
            background: linear-gradient(135deg, #0f1b16 0%, #0d1218 60%);
            border: 1px solid rgba(45, 226, 166, 0.18);
            border-radius: var(--radius-lg);
            padding: var(--spacing-lg);
            text-align: center;
        }

        .cta-panel h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 10px 0;
            line-height: 1.35;
        }

        .cta-panel p {
            font-size: 14.5px;
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 auto var(--spacing-md);
            line-height: 1.7;
        }

        /* Footer */
        .site-footer {
            background-color: #0a0e13;
            padding: var(--spacing-lg) 0 var(--spacing-md);
            border-top: 1px solid rgba(45, 226, 166, 0.08);
            margin-top: var(--spacing-xl);
        }

        .footer-top {
            display: flex;
            flex-wrap: wrap;
            gap: var(--spacing-lg);
            justify-content: space-between;
            margin-bottom: var(--spacing-md);
        }

        .footer-brand {
            max-width: 300px;
        }

        .footer-brand .brand-logo {
            margin-bottom: 10px;
            font-size: 18px;
        }

        .footer-brand p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }

        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 6px 16px;
            align-items: center;
        }

        .footer-links a {
            font-size: 13px;
            color: var(--text-secondary);
            transition: color var(--transition);
            text-decoration: none;
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(230, 237, 243, 0.08);
            padding-top: var(--spacing-sm);
            display: flex;
            flex-wrap: wrap;
            gap: 10px 20px;
            justify-content: space-between;
            align-items: center;
            font-size: 12px;
            color: var(--text-muted);
        }

        .footer-bottom p {
            margin: 0;
        }

        .footer-bottom a {
            color: var(--text-muted);
            text-decoration: none;
            transition: color var(--transition);
        }

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

        /* Responsive */
        @media screen and (max-width: 1024px) {
            .header-inner {
                flex-wrap: wrap;
            }

            .search-box {
                min-width: 140px;
            }

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

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

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

        @media screen and (max-width: 768px) {
            .section {
                padding: var(--spacing-lg) 0;
            }

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

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

            .news-list-grid {
                grid-template-columns: 1fr;
            }

            .featured-list {
                grid-template-columns: 1fr;
            }

            .subscribe-panel {
                flex-direction: column;
                text-align: center;
            }

            .subscribe-form {
                justify-content: center;
            }

            .footer-top {
                flex-direction: column;
                gap: var(--spacing-md);
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media screen and (max-width: 640px) {
            .header-inner {
                gap: 10px;
            }

            .nav-links {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: rgba(13, 18, 24, 0.98);
                flex-direction: column;
                padding: 12px 20px;
                gap: 2px;
                border-bottom: 1px solid rgba(45, 226, 166, 0.1);
                z-index: 99;
            }

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

            .nav-links a {
                padding: 10px 14px;
                font-size: 15px;
                width: 100%;
            }

            .mobile-toggle {
                display: inline-flex;
            }

            .header-actions .btn-primary {
                display: none;
            }

            .search-box {
                min-width: 0;
                flex: 1;
            }

            .page-hero h1 {
                font-size: 22px;
            }

            .stats-mini-grid {
                grid-template-columns: 1fr;
            }

            .stat-mini-item {
                text-align: center;
            }

            .topics-grid {
                grid-template-columns: 1fr;
            }

            .cta-panel {
                padding: var(--spacing-md);
            }

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

            .subscribe-form {
                flex-direction: column;
                width: 100%;
            }

            .subscribe-form input {
                min-width: 0;
                width: 100%;
            }
        }

        @media screen and (max-width: 480px) {
            .container {
                padding-left: 14px;
                padding-right: 14px;
            }

            .section-title {
                font-size: 20px;
            }

            .news-card-title {
                font-size: 15px;
            }

            .footer-links {
                gap: 5px 12px;
            }
        }

/* roulang page: category6 */
:root {
            --bg-dark: #0d1218;
            --bg-panel: #121a24;
            --bg-card: #16202b;
            --bg-input: #0f1822;
            --text-primary: #e6edf3;
            --text-secondary: #8fa3b5;
            --text-muted: #5e7387;
            --highlight: #2de2a6;
            --highlight-soft: rgba(45, 226, 166, 0.12);
            --highlight-border: rgba(45, 226, 166, 0.22);
            --purple-muted: #6d5b8f;
            --purple-soft: rgba(109, 91, 143, 0.15);
            --radius: 8px;
            --radius-sm: 6px;
            --radius-lg: 10px;
            --shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 12px 32px rgba(0, 0, 0, 0.45);
            --transition: 0.22s ease;
            --font-stack: system-ui, -apple-system, 'Segoe UI', '苹方', '微软雅黑', 'PingFang SC', 'Hiragino Sans GB', 'Source Han Sans SC', sans-serif;
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 24px;
            --spacing-lg: 40px;
            --spacing-xl: 56px;
            --spacing-xxl: 72px;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-stack);
            background-color: var(--bg-dark);
            color: var(--text-primary);
            font-size: 15px;
            line-height: 1.7;
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--highlight);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: #5ff0bc;
        }
        a:focus-visible {
            outline: 2px solid var(--highlight);
            outline-offset: 3px;
            border-radius: 2px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button, input, textarea, select {
            font-family: var(--font-stack);
            font-size: 15px;
        }
        button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible {
            outline: 2px solid var(--highlight);
            outline-offset: 2px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }
        .section {
            padding: var(--spacing-xl) 0;
        }
        .section--compact {
            padding: var(--spacing-lg) 0;
        }
        .section--dark-alt {
            background-color: var(--bg-panel);
        }
        .section--darker {
            background-color: #0a0e13;
        }
        .section-title {
            font-size: 26px;
            font-weight: 700;
            line-height: 1.35;
            margin-bottom: 12px;
            color: var(--text-primary);
            letter-spacing: 0.5px;
        }
        .section-subtitle {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.75;
            max-width: 680px;
            margin-bottom: var(--spacing-md);
        }
        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 1.2px;
            color: var(--highlight);
            background: var(--highlight-soft);
            padding: 6px 14px;
            border-radius: 20px;
            margin-bottom: 14px;
            border: 1px solid var(--highlight-border);
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 600;
            font-size: 15px;
            padding: 12px 26px;
            border-radius: var(--radius-sm);
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
            letter-spacing: 0.3px;
            line-height: 1.2;
        }
        .btn-primary {
            background-color: var(--highlight);
            color: #0a1410;
            border: 1px solid var(--highlight);
        }
        .btn-primary:hover {
            background-color: #5ff0bc;
            border-color: #5ff0bc;
            color: #0a1410;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(45, 226, 166, 0.25);
        }
        .btn-secondary {
            background: transparent;
            color: var(--text-primary);
            border: 1px solid rgba(230, 237, 243, 0.3);
        }
        .btn-secondary:hover {
            border-color: var(--highlight);
            color: var(--highlight);
            background: var(--highlight-soft);
            transform: translateY(-2px);
        }
        .btn-sm {
            padding: 9px 18px;
            font-size: 13px;
        }
        .card {
            background: var(--bg-card);
            border: 1px solid rgba(45, 226, 166, 0.12);
            border-radius: var(--radius);
            padding: var(--spacing-md);
            transition: all var(--transition);
            box-shadow: none;
        }
        .card:hover {
            border-color: var(--highlight-border);
            box-shadow: var(--shadow);
            transform: translateY(-3px);
        }
        .card-title {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .card-text {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 0;
        }
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 12px;
            font-weight: 500;
            padding: 4px 12px;
            border-radius: 20px;
            color: var(--highlight);
            background: var(--highlight-soft);
            border: 1px solid var(--highlight-border);
        }
        .badge--secondary {
            color: var(--text-secondary);
            background: rgba(143, 163, 181, 0.1);
            border-color: rgba(143, 163, 181, 0.2);
        }
        .badge--purple {
            color: #b9a8d8;
            background: var(--purple-soft);
            border-color: rgba(109, 91, 143, 0.35);
        }
        /* Header / Navigation */
        .site-header {
            background: rgba(13, 18, 24, 0.92);
            border-bottom: 1px solid rgba(45, 226, 166, 0.15);
            position: sticky;
            top: 0;
            z-index: 100;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            padding: 14px 20px;
            max-width: 1200px;
            margin: 0 auto;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
            text-decoration: none;
            white-space: nowrap;
            letter-spacing: 0.5px;
        }
        .brand-logo:hover {
            color: var(--highlight);
        }
        .brand-icon {
            width: 32px;
            height: 32px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 6px;
            background: var(--highlight-soft);
            border: 1px solid var(--highlight-border);
            color: var(--highlight);
            font-size: 15px;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-links li a {
            display: inline-block;
            padding: 8px 14px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            letter-spacing: 0.3px;
        }
        .nav-links li a:hover {
            color: var(--highlight);
            background: var(--highlight-soft);
        }
        .nav-links li a.active {
            color: var(--highlight);
            background: var(--highlight-soft);
            border: 1px solid var(--highlight-border);
        }
        .nav-search {
            display: flex;
            align-items: center;
            gap: 8px;
            background: var(--bg-input);
            border: 1px solid rgba(143, 163, 181, 0.2);
            border-radius: var(--radius-sm);
            padding: 6px 14px;
            transition: border-color var(--transition);
        }
        .nav-search:hover {
            border-color: var(--highlight-border);
        }
        .nav-search input {
            background: transparent;
            border: none;
            outline: none;
            color: var(--text-primary);
            font-size: 13px;
            width: 130px;
        }
        .nav-search input::placeholder {
            color: var(--text-muted);
        }
        .nav-search i {
            color: var(--text-muted);
            font-size: 13px;
        }
        .nav-cta {
            white-space: nowrap;
        }
        .nav-toggle {
            display: none;
            background: transparent;
            border: 1px solid rgba(230, 237, 243, 0.2);
            color: var(--text-primary);
            font-size: 20px;
            padding: 6px 12px;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: all var(--transition);
        }
        .nav-toggle:hover {
            background: var(--highlight-soft);
            border-color: var(--highlight-border);
            color: var(--highlight);
        }
        .mobile-menu {
            display: none;
            flex-direction: column;
            gap: 4px;
            padding: 12px 20px 20px;
            background: var(--bg-panel);
            border-bottom: 1px solid rgba(45, 226, 166, 0.15);
        }
        .mobile-menu a {
            padding: 10px 12px;
            color: var(--text-secondary);
            font-size: 14px;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
        }
        .mobile-menu a:hover,
        .mobile-menu a.active {
            color: var(--highlight);
            background: var(--highlight-soft);
        }
        /* Breadcrumb */
        .breadcrumb-bar {
            padding: 16px 20px;
            background: var(--bg-panel);
            border-bottom: 1px solid rgba(45, 226, 166, 0.08);
        }
        .breadcrumb {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
            flex-wrap: wrap;
        }
        .breadcrumb li {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .breadcrumb li a {
            color: var(--text-secondary);
            text-decoration: none;
            transition: color var(--transition);
        }
        .breadcrumb li a:hover {
            color: var(--highlight);
        }
        .breadcrumb li.current {
            color: var(--highlight);
            font-weight: 500;
        }
        .breadcrumb .separator {
            color: var(--text-muted);
            font-size: 10px;
        }
        /* Page Hero (分类页紧凑版) */
        .page-hero {
            position: relative;
            background: var(--bg-panel);
            border-bottom: 1px solid rgba(45, 226, 166, 0.12);
            overflow: hidden;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -40px;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, var(--highlight-soft) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            bottom: -80px;
            left: -60px;
            width: 280px;
            height: 280px;
            background: radial-gradient(circle, var(--purple-soft) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .page-hero .container {
            position: relative;
            z-index: 1;
            padding-top: 42px;
            padding-bottom: 42px;
        }
        .page-hero h1 {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 12px;
            color: var(--text-primary);
            letter-spacing: 0.5px;
        }
        .page-hero .hero-subtitle {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.75;
            max-width: 720px;
            margin-bottom: 0;
        }
        /* Info cards / list cards */
        .article-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .article-card {
            background: var(--bg-card);
            border: 1px solid rgba(45, 226, 166, 0.1);
            border-radius: var(--radius);
            overflow: hidden;
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .article-card:hover {
            border-color: var(--highlight-border);
            box-shadow: var(--shadow);
            transform: translateY(-3px);
        }
        .article-card .card-img {
            position: relative;
            aspect-ratio: 16/9;
            overflow: hidden;
            background-color: #0f1822;
        }
        .article-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .article-card:hover .card-img img {
            transform: scale(1.04);
        }
        .article-card .card-body {
            padding: 18px 20px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .article-card .card-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 8px;
        }
        .article-card .card-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.45;
            margin-bottom: 8px;
        }
        .article-card .card-excerpt {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            flex: 1;
            margin-bottom: 12px;
        }
        .article-card .card-link {
            font-size: 13px;
            font-weight: 500;
            color: var(--highlight);
            display: inline-flex;
            align-items: center;
            gap: 5px;
            transition: all var(--transition);
        }
        .article-card .card-link:hover {
            color: #5ff0bc;
            gap: 8px;
        }
        /* Timeline */
        .timeline-wrap {
            position: relative;
            padding-left: 26px;
        }
        .timeline-wrap::before {
            content: '';
            position: absolute;
            left: 8px;
            top: 6px;
            bottom: 6px;
            width: 2px;
            background: var(--highlight-border);
        }
        .timeline-item {
            position: relative;
            padding-left: 28px;
            padding-bottom: 28px;
        }
        .timeline-item:last-child {
            padding-bottom: 0;
        }
        .timeline-item::before {
            content: '';
            position: absolute;
            left: 2px;
            top: 5px;
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background: var(--bg-dark);
            border: 3px solid var(--highlight);
            z-index: 1;
        }
        .timeline-item .tl-date {
            font-size: 12px;
            font-weight: 600;
            color: var(--highlight);
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 4px;
        }
        .timeline-item .tl-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 4px;
        }
        .timeline-item .tl-text {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }
        /* Stats */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }
        .stat-item {
            background: var(--bg-card);
            border: 1px solid rgba(45, 226, 166, 0.12);
            border-radius: var(--radius);
            padding: 20px;
            text-align: center;
            transition: all var(--transition);
        }
        .stat-item:hover {
            border-color: var(--highlight-border);
            box-shadow: var(--shadow);
        }
        .stat-item .stat-value {
            font-size: 28px;
            font-weight: 700;
            color: var(--highlight);
            font-variant-numeric: tabular-nums;
            letter-spacing: 0.5px;
            margin-bottom: 4px;
        }
        .stat-item .stat-label {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.5;
        }
        /* Services / brand highlights */
        .brand-service-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .brand-service-card {
            background: var(--bg-card);
            border: 1px solid rgba(45, 226, 166, 0.1);
            border-radius: var(--radius);
            padding: 24px;
            transition: all var(--transition);
        }
        .brand-service-card:hover {
            border-color: var(--highlight-border);
            box-shadow: var(--shadow);
            transform: translateY(-3px);
        }
        .brand-service-card .bs-icon {
            width: 44px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            background: var(--highlight-soft);
            border: 1px solid var(--highlight-border);
            color: var(--highlight);
            font-size: 18px;
            margin-bottom: 14px;
        }
        .brand-service-card h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .brand-service-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 0;
        }
        /* Brand intro */
        .brand-intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 36px;
            align-items: center;
        }
        .brand-intro-img {
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid rgba(45, 226, 166, 0.15);
        }
        .brand-intro-img img {
            width: 100%;
            height: 340px;
            object-fit: cover;
        }
        /* Guarantee cards */
        .guarantee-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }
        .guarantee-item {
            display: flex;
            gap: 14px;
            align-items: flex-start;
            background: var(--bg-card);
            border: 1px solid rgba(45, 226, 166, 0.1);
            border-radius: var(--radius);
            padding: 18px 20px;
            transition: all var(--transition);
        }
        .guarantee-item:hover {
            border-color: var(--highlight-border);
            box-shadow: var(--shadow);
        }
        .guarantee-item .g-icon {
            flex-shrink: 0;
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 6px;
            background: var(--highlight-soft);
            border: 1px solid var(--highlight-border);
            color: var(--highlight);
            font-size: 15px;
        }
        .guarantee-item .g-title {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 4px;
        }
        .guarantee-item .g-text {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 0;
        }
        /* FAQ */
        .faq-wrap {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid rgba(45, 226, 166, 0.1);
            border-radius: var(--radius);
            margin-bottom: 12px;
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: var(--highlight-border);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 16px 20px;
            cursor: pointer;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            transition: all var(--transition);
            background: transparent;
            border: none;
            width: 100%;
            text-align: left;
        }
        .faq-question:hover {
            color: var(--highlight);
        }
        .faq-question .faq-icon {
            flex-shrink: 0;
            font-size: 13px;
            color: var(--text-muted);
            transition: transform var(--transition);
        }
        .faq-item.active .faq-question .faq-icon {
            transform: rotate(180deg);
            color: var(--highlight);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
        }
        .faq-answer-inner {
            padding: 0 20px 18px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
        }
        /* Form */
        .cta-form-wrap {
            background: var(--bg-card);
            border: 1px solid rgba(45, 226, 166, 0.15);
            border-radius: var(--radius-lg);
            padding: 28px;
            max-width: 640px;
            margin: 0 auto;
        }
        .cta-form-wrap .form-title {
            font-size: 20px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 6px;
        }
        .cta-form-wrap .form-subtitle {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 20px;
        }
        .cta-form-wrap label {
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            margin-bottom: 4px;
            display: block;
        }
        .cta-form-wrap input,
        .cta-form-wrap textarea {
            background: var(--bg-input);
            border: 1px solid rgba(143, 163, 181, 0.2);
            border-radius: var(--radius-sm);
            padding: 10px 14px;
            color: var(--text-primary);
            width: 100%;
            transition: all var(--transition);
            margin-bottom: 14px;
        }
        .cta-form-wrap input:focus,
        .cta-form-wrap textarea:focus {
            border-color: var(--highlight);
            box-shadow: 0 0 0 2px var(--highlight-soft);
            outline: none;
        }
        .cta-form-wrap textarea {
            min-height: 100px;
            resize: vertical;
        }
        .form-privacy {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 10px;
            text-align: center;
        }
        .form-trust-badges {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
            margin-top: 16px;
            font-size: 12px;
            color: var(--text-muted);
        }
        .form-trust-badges span {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .form-trust-badges i {
            color: var(--highlight);
            font-size: 11px;
        }
        /* Footer */
        .site-footer {
            background: #0a0e13;
            border-top: 1px solid rgba(45, 226, 166, 0.1);
            padding: var(--spacing-lg) 0 var(--spacing-md);
        }
        .footer-top {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            margin-bottom: 24px;
        }
        .footer-brand p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
            margin-top: 8px;
            max-width: 360px;
        }
        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            align-content: flex-start;
            justify-content: flex-end;
        }
        .footer-links a {
            font-size: 13px;
            color: var(--text-secondary);
            padding: 4px 10px;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
        }
        .footer-links a:hover {
            color: var(--highlight);
            background: var(--highlight-soft);
        }
        .footer-bottom {
            border-top: 1px solid rgba(143, 163, 181, 0.1);
            padding-top: 16px;
            display: flex;
            flex-direction: column;
            gap: 6px;
            font-size: 12px;
            color: var(--text-muted);
            text-align: center;
        }
        .footer-bottom p {
            margin-bottom: 0;
            font-size: 12px;
            color: var(--text-muted);
        }
        .footer-bottom a {
            color: var(--text-muted);
            transition: color var(--transition);
        }
        .footer-bottom a:hover {
            color: var(--highlight);
        }
        /* Responsive */
        @media (max-width: 1024px) {
            .nav-links {
                display: none;
            }
            .nav-search {
                display: none;
            }
            .nav-toggle {
                display: inline-flex;
                align-items: center;
                justify-content: center;
            }
            .mobile-menu.show {
                display: flex;
            }
            .article-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .brand-service-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .guarantee-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .brand-intro-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .brand-intro-img img {
                height: 260px;
            }
        }
        @media (max-width: 640px) {
            .header-inner {
                padding: 12px 16px;
                gap: 12px;
            }
            .brand-logo {
                font-size: 16px;
            }
            .brand-icon {
                width: 28px;
                height: 28px;
                font-size: 13px;
            }
            .nav-cta {
                font-size: 13px;
                padding: 9px 14px;
            }
            .page-hero .container {
                padding-top: 28px;
                padding-bottom: 28px;
            }
            .page-hero h1 {
                font-size: 26px;
            }
            .page-hero .hero-subtitle {
                font-size: 14px;
            }
            .section {
                padding: var(--spacing-lg) 0;
            }
            .section-title {
                font-size: 22px;
            }
            .article-grid {
                grid-template-columns: 1fr;
            }
            .brand-service-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .stat-item {
                padding: 14px;
            }
            .stat-item .stat-value {
                font-size: 22px;
            }
            .guarantee-grid {
                grid-template-columns: 1fr;
            }
            .footer-top {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-links {
                justify-content: flex-start;
            }
            .timeline-wrap {
                padding-left: 20px;
            }
            .timeline-wrap::before {
                left: 5px;
            }
            .timeline-item {
                padding-left: 22px;
            }
            .timeline-item::before {
                left: 0;
                width: 12px;
                height: 12px;
            }
            .cta-form-wrap {
                padding: 20px;
            }
        }