/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #FF6B00;
            --primary-hover: #E05F00;
            --primary-light: #FFF3E0;
            --secondary: #1A237E;
            --secondary-hover: #151B6B;
            --accent: #FFD600;
            --bg: #F7F9FC;
            --card-bg: #FFFFFF;
            --text-primary: #1E293B;
            --text-secondary: #64748B;
            --text-light: #94A3B8;
            --border: #E2E8F0;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
            --shadow-lg: 0 8px 32px rgba(0,0,0,0.12);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --max-width: 1200px;
            --nav-brand-bg: #1A237E;
            --nav-channel-bg: #FFFFFF;
            --footer-bg: #0F172A;
            --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: var(--font-stack);
            color: var(--text-primary);
            background: var(--bg);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--primary-hover); }
        a:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
        img { max-width: 100%; height: auto; display: block; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text-primary); }
        .container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }

        /* ===== Utility ===== */
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 {
            font-size: 36px;
            font-weight: 700;
            color: var(--text-primary);
            position: relative;
            display: inline-block;
        }
        .section-title h2::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: var(--primary);
            border-radius: 2px;
            margin: 12px auto 0;
        }
        .section-title p {
            font-size: 18px;
            color: var(--text-secondary);
            margin-top: 12px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 32px;
            font-size: 16px;
            font-weight: 600;
            border-radius: var(--radius-sm);
            border: 2px solid transparent;
            cursor: pointer;
            transition: all var(--transition);
            text-align: center;
            line-height: 1.4;
            font-family: var(--font-stack);
        }
        .btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
        .btn:active { transform: translateY(0); }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .btn-primary:hover { background: var(--primary-hover); border-color: var(--primary-hover); color: #fff; }
        .btn-secondary {
            background: var(--secondary);
            color: #fff;
            border-color: var(--secondary);
        }
        .btn-secondary:hover { background: var(--secondary-hover); border-color: var(--secondary-hover); color: #fff; }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-outline:hover { background: var(--primary); color: #fff; }
        .btn-accent {
            background: var(--accent);
            color: var(--text-primary);
            border-color: var(--accent);
        }
        .btn-accent:hover { background: #E6C200; color: var(--text-primary); }
        .btn-sm { padding: 8px 20px; font-size: 14px; }
        .btn-lg { padding: 16px 40px; font-size: 18px; }
        .badge {
            display: inline-block;
            padding: 4px 14px;
            font-size: 12px;
            font-weight: 600;
            border-radius: 20px;
            background: var(--primary-light);
            color: var(--primary);
            letter-spacing: 0.3px;
        }
        .badge-accent { background: #FFF8E1; color: #F9A825; }
        .badge-blue { background: #E3F2FD; color: #1565C0; }
        .text-secondary { color: var(--text-secondary); }
        .text-center { text-align: center; }
        .mt-1 { margin-top: 8px; }
        .mt-2 { margin-top: 16px; }
        .mt-3 { margin-top: 24px; }
        .mt-4 { margin-top: 40px; }
        .mb-3 { margin-bottom: 24px; }
        .mb-4 { margin-bottom: 40px; }
        .gap-2 { gap: 16px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }

        /* ===== Header & Navigation ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 12px rgba(0,0,0,0.08);
        }
        .nav-brand-row {
            background: var(--nav-brand-bg);
            padding: 10px 0;
        }
        .nav-brand-row .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .site-logo {
            font-size: 24px;
            font-weight: 800;
            color: var(--accent);
            letter-spacing: 0.5px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .site-logo i { font-size: 28px; color: var(--accent); }
        .site-logo:hover { color: var(--accent); opacity: 0.9; }
        .nav-brand-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .nav-brand-actions .btn { padding: 6px 18px; font-size: 13px; font-weight: 600; }
        .nav-channel-row {
            background: var(--nav-channel-bg);
            border-bottom: 1px solid var(--border);
        }
        .nav-channel-row .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            padding: 8px 0;
        }
        .nav-links a {
            padding: 8px 20px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-primary);
            border-radius: 20px;
            transition: all var(--transition);
            position: relative;
        }
        .nav-links a:hover { background: var(--primary-light); color: var(--primary); }
        .nav-links a.active {
            background: var(--primary-light);
            color: var(--primary);
            font-weight: 600;
        }
        .nav-links a i { margin-right: 6px; font-size: 14px; }
        .nav-search {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-search input {
            padding: 6px 14px;
            border: 1.5px solid var(--border);
            border-radius: 20px;
            font-size: 14px;
            width: 180px;
            transition: all var(--transition);
            background: var(--bg);
            font-family: var(--font-stack);
        }
        .nav-search input:focus { outline: none; border-color: var(--primary); width: 220px; }
        .nav-search button {
            background: none;
            border: none;
            color: var(--text-secondary);
            font-size: 16px;
            cursor: pointer;
            padding: 6px;
            transition: color var(--transition);
        }
        .nav-search button:hover { color: var(--primary); }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 28px;
            color: var(--text-primary);
            cursor: pointer;
            padding: 4px 8px;
            transition: color var(--transition);
        }
        .hamburger:hover { color: var(--primary); }
        .mobile-drawer {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0,0,0,0.5);
            z-index: 2000;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
        }
        .mobile-drawer.open { opacity: 1; visibility: visible; }
        .mobile-drawer-inner {
            background: var(--card-bg);
            width: 85%;
            max-width: 320px;
            height: 100%;
            padding: 24px;
            overflow-y: auto;
            transform: translateX(-100%);
            transition: transform 0.3s ease;
        }
        .mobile-drawer.open .mobile-drawer-inner { transform: translateX(0); }
        .mobile-drawer-close {
            background: none;
            border: none;
            font-size: 28px;
            color: var(--text-primary);
            cursor: pointer;
            margin-bottom: 20px;
            display: block;
        }
        .mobile-drawer-links a {
            display: block;
            padding: 14px 0;
            font-size: 18px;
            font-weight: 500;
            color: var(--text-primary);
            border-bottom: 1px solid var(--border);
            transition: color var(--transition);
        }
        .mobile-drawer-links a:hover { color: var(--primary); }
        .mobile-drawer-links a.active { color: var(--primary); font-weight: 700; }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 80vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26,35,126,0.75) 0%, rgba(255,107,0,0.45) 100%);
            z-index: 1;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
            padding: 40px 20px;
        }
        .hero h1 {
            font-size: 52px;
            font-weight: 800;
            color: #fff;
            text-shadow: 0 4px 20px rgba(0,0,0,0.3);
            margin-bottom: 16px;
            letter-spacing: 1px;
        }
        .hero .subtitle {
            font-size: 22px;
            color: rgba(255,255,255,0.92);
            margin-bottom: 32px;
            font-weight: 400;
            line-height: 1.6;
        }
        .hero .btn {
            font-size: 18px;
            padding: 16px 48px;
            border-radius: var(--radius-sm);
            box-shadow: 0 8px 24px rgba(255,107,0,0.35);
        }
        .hero .btn:hover { transform: scale(1.05); box-shadow: 0 12px 32px rgba(255,107,0,0.45); }
        .hero-stats-row {
            display: flex;
            justify-content: center;
            gap: 48px;
            margin-top: 48px;
            flex-wrap: wrap;
        }
        .hero-stat { text-align: center; }
        .hero-stat .num {
            font-size: 48px;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
        }
        .hero-stat .label {
            font-size: 14px;
            color: rgba(255,255,255,0.8);
            margin-top: 4px;
            letter-spacing: 0.5px;
        }

        /* ===== Metrics Dashboard ===== */
        .metrics-section {
            padding: 80px 0;
            background: var(--card-bg);
        }
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .metric-card {
            text-align: center;
            padding: 40px 24px;
            background: var(--card-bg);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }
        .metric-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-6px); }
        .metric-card .num {
            font-size: 56px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }
        .metric-card .num .suffix { font-size: 28px; font-weight: 400; }
        .metric-card .label {
            font-size: 16px;
            color: var(--text-secondary);
            margin-top: 8px;
            font-weight: 500;
        }
        .metric-card .desc {
            font-size: 14px;
            color: var(--text-light);
            margin-top: 6px;
        }
        .metric-divider { border-right: 1px dashed var(--border); }

        /* ===== Service Matrix ===== */
        .services-section {
            padding: 80px 0;
            background: var(--bg);
        }
        .services-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .service-card {
            background: var(--card-bg);
            border-radius: var(--radius-md);
            padding: 32px 20px;
            text-align: center;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }
        .service-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
        .service-icon {
            width: 72px;
            height: 72px;
            margin: 0 auto 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 32px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary-light), #FFF8E1);
            color: var(--primary);
            transition: transform var(--transition);
        }
        .service-card:hover .service-icon { transform: scale(1.1); }
        .service-card h3 { font-size: 20px; font-weight: 600; margin-bottom: 8px; }
        .service-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.6; }

        /* ===== Comparison ===== */
        .comparison-section {
            padding: 80px 0;
            background: var(--card-bg);
        }
        .comparison-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: start;
        }
        .compare-col {
            padding: 32px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            background: var(--bg);
        }
        .compare-col.old-way { border-color: #FEE2E2; background: #FFF5F5; }
        .compare-col.new-way { border-color: #D1FAE5; background: #F0FFF4; }
        .compare-col h3 {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .compare-col.old-way h3 { color: #DC2626; }
        .compare-col.new-way h3 { color: #16A34A; }
        .compare-list { display: flex; flex-direction: column; gap: 12px; }
        .compare-list li {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 16px;
            color: var(--text-primary);
            padding: 8px 0;
        }
        .compare-list li i { font-size: 18px; width: 24px; text-align: center; }
        .compare-list li .check { color: #16A34A; }
        .compare-list li .cross { color: #DC2626; }
        .comparison-cta { margin-top: 32px; text-align: center; }

        /* ===== Latest News / CMS ===== */
        .news-section {
            padding: 80px 0;
            background: var(--bg);
        }
        .news-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
            gap: 24px;
        }
        .news-card {
            background: var(--card-bg);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .news-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
        .news-card .thumb {
            width: 100%;
            height: 180px;
            object-fit: cover;
            background: #E2E8F0;
        }
        .news-card .body { padding: 20px; flex: 1; display: flex; flex-direction: column; }
        .news-card .body .badge { align-self: flex-start; margin-bottom: 10px; }
        .news-card .body h4 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card .body h4 a { color: var(--text-primary); }
        .news-card .body h4 a:hover { color: var(--primary); }
        .news-card .body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
        }
        .news-card .footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 12px 20px;
            border-top: 1px solid var(--border);
            font-size: 13px;
            color: var(--text-light);
        }
        .news-card .footer .date { display: flex; align-items: center; gap: 6px; }
        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 60px 20px;
            color: var(--text-secondary);
            font-size: 16px;
            background: var(--card-bg);
            border-radius: var(--radius-md);
            border: 1px dashed var(--border);
        }
        .news-empty i { font-size: 48px; color: var(--text-light); margin-bottom: 16px; display: block; }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 80px 0;
            background: var(--card-bg);
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover { border-color: var(--primary); }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            background: var(--card-bg);
            border: none;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            text-align: left;
            gap: 16px;
            transition: background var(--transition);
            font-family: var(--font-stack);
        }
        .faq-question:hover { background: var(--primary-light); }
        .faq-question .icon {
            font-size: 20px;
            color: var(--primary);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question .icon { transform: rotate(45deg); }
        .faq-answer {
            padding: 0 24px;
            max-height: 0;
            overflow: hidden;
            transition: all 0.3s ease;
            background: #F1F5F9;
        }
        .faq-item.open .faq-answer {
            padding: 16px 24px;
            max-height: 300px;
        }
        .faq-answer p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ===== CTA / Form Section ===== */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, var(--secondary) 0%, #0D1B3E 100%);
            color: #fff;
        }
        .cta-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .cta-left h2 {
            font-size: 36px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }
        .cta-left p {
            font-size: 18px;
            color: rgba(255,255,255,0.85);
            line-height: 1.7;
            margin-bottom: 24px;
        }
        .cta-left .features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
        }
        .cta-left .features li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 15px;
            color: rgba(255,255,255,0.9);
        }
        .cta-left .features li i { color: var(--accent); font-size: 16px; }
        .cta-form-card {
            background: var(--card-bg);
            border-radius: var(--radius-md);
            padding: 36px;
            box-shadow: var(--shadow-lg);
        }
        .cta-form-card h3 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }
        .cta-form-card p {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 20px;
        }
        .cta-form-card form { display: flex; flex-direction: column; gap: 16px; }
        .cta-form-card .form-group { display: flex; flex-direction: column; gap: 4px; }
        .cta-form-card label {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-primary);
        }
        .cta-form-card input,
        .cta-form-card select {
            padding: 12px 16px;
            border: 1.5px solid #CBD5E1;
            border-radius: var(--radius-sm);
            font-size: 15px;
            transition: all var(--transition);
            background: var(--card-bg);
            font-family: var(--font-stack);
            color: var(--text-primary);
        }
        .cta-form-card input:focus,
        .cta-form-card select:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(255,107,0,0.15);
        }
        .cta-form-card .btn-submit {
            background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
            color: #fff;
            padding: 14px;
            border: none;
            border-radius: var(--radius-sm);
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all var(--transition);
            font-family: var(--font-stack);
        }
        .cta-form-card .btn-submit:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(255,107,0,0.3); }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--footer-bg);
            color: rgba(255,255,255,0.8);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .site-logo { color: var(--accent); font-size: 22px; margin-bottom: 12px; display: block; }
        .footer-brand p { font-size: 14px; line-height: 1.7; color: rgba(255,255,255,0.65); max-width: 320px; }
        .footer-col h4 {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-col ul { display: flex; flex-direction: column; gap: 10px; }
        .footer-col ul a {
            font-size: 14px;
            color: rgba(255,255,255,0.65);
            transition: color var(--transition);
        }
        .footer-col ul a:hover { color: var(--primary); }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 14px;
            color: rgba(255,255,255,0.5);
        }
        .footer-bottom a { color: rgba(255,255,255,0.6); }
        .footer-bottom a:hover { color: var(--primary); }

        /* ===== Responsive ===== */
        @media screen and (max-width: 1024px) {
            .services-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .cta-grid { grid-template-columns: 1fr; }
            .hero h1 { font-size: 42px; }
            .hero .subtitle { font-size: 18px; }
            .metrics-grid { gap: 20px; }
            .metric-card .num { font-size: 44px; }
        }

        @media screen and (max-width: 768px) {
            .nav-links { display: none; }
            .nav-search { display: none; }
            .hamburger { display: block; }
            .mobile-drawer { display: block; }
            .hero { min-height: 60vh; }
            .hero h1 { font-size: 36px; }
            .hero .subtitle { font-size: 16px; }
            .hero .btn { font-size: 16px; padding: 14px 36px; }
            .hero-stats-row { gap: 24px; }
            .hero-stat .num { font-size: 36px; }
            .metrics-grid { grid-template-columns: 1fr; }
            .metric-divider { border-right: none; border-bottom: 1px dashed var(--border); padding-bottom: 20px; }
            .services-grid { grid-template-columns: 1fr; }
            .comparison-grid { grid-template-columns: 1fr; gap: 24px; }
            .news-grid { grid-template-columns: 1fr; }
            .section-title h2 { font-size: 28px; }
            .cta-left h2 { font-size: 28px; }
            .cta-left .features { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .faq-question { font-size: 15px; padding: 14px 16px; }
            .faq-answer { font-size: 14px; }
            .cta-form-card { padding: 24px; }
            .nav-brand-actions .btn { padding: 4px 12px; font-size: 12px; }
            .site-logo { font-size: 20px; }
            .site-logo i { font-size: 22px; }
        }

        @media screen and (max-width: 520px) {
            .hero h1 { font-size: 28px; }
            .hero .subtitle { font-size: 14px; }
            .hero-stat .num { font-size: 28px; }
            .hero-stats-row { gap: 16px; }
            .btn-lg { padding: 12px 28px; font-size: 16px; }
            .container { padding: 0 12px; }
            .metrics-section { padding: 40px 0; }
            .services-section { padding: 40px 0; }
            .comparison-section { padding: 40px 0; }
            .news-section { padding: 40px 0; }
            .faq-section { padding: 40px 0; }
            .cta-section { padding: 40px 0; }
            .section-title { margin-bottom: 28px; }
        }

/* roulang page: article */
/* ===== CSS 设计变量 ===== */
        :root {
            --primary: #FF6B00;
            --primary-hover: #E85D00;
            --primary-light: #FFF3E0;
            --secondary: #1A237E;
            --secondary-hover: #151B6A;
            --accent: #FFD600;
            --accent-light: #FFF8E1;
            --bg-body: #F7F9FC;
            --bg-card: #FFFFFF;
            --text-primary: #1E293B;
            --text-secondary: #64748B;
            --text-light: #94A3B8;
            --border-color: #E2E8F0;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
            --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
            --shadow-xl: 0 16px 40px rgba(0,0,0,0.16);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            --container-max: 1200px;
            --header-brand-bg: #1A237E;
            --footer-bg: #0F172A;
            --section-gap: 80px;
            --section-gap-mobile: 40px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
        }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-hover); }
        a:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; border-radius: 2px; }
        img { max-width: 100%; height: auto; display: block; }
        ul, ol { list-style: none; }
        button { cursor: pointer; font-family: inherit; border: none; background: none; }
        input, textarea, select { font-family: inherit; font-size: inherit; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text-primary); }

        /* ===== Container ===== */
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* ===== 导航 Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: var(--bg-card);
            box-shadow: 0 2px 20px rgba(0,0,0,0.08);
        }
        .nav-brand-row {
            background: var(--header-brand-bg);
            padding: 10px 0;
        }
        .nav-brand-row .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 24px;
            font-weight: 800;
            color: var(--accent) !important;
            letter-spacing: 0.5px;
            transition: var(--transition);
        }
        .site-logo i { font-size: 28px; color: var(--accent); }
        .site-logo:hover { opacity: 0.85; color: var(--accent) !important; }
        .nav-brand-actions { display: flex; align-items: center; gap: 10px; }
        .nav-brand-actions .btn { padding: 6px 18px; font-size: 14px; border-radius: var(--radius-sm); transition: var(--transition); }
        .btn-outline { background: transparent; border: 1.5px solid rgba(255,255,255,0.3); color: rgba(255,255,255,0.9); }
        .btn-outline:hover { background: rgba(255,255,255,0.12); border-color: rgba(255,255,255,0.6); color: #fff; }
        .btn-accent { background: var(--accent); color: var(--secondary) !important; font-weight: 600; border: none; }
        .btn-accent:hover { background: #FFC107; transform: translateY(-1px); box-shadow: 0 4px 12px rgba(255,214,0,0.4); }

        .nav-channel-row {
            background: var(--bg-card);
            border-bottom: 1px solid var(--border-color);
            padding: 0;
        }
        .nav-channel-row .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 52px;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }
        .nav-links a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 50px;
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-links a i { font-size: 14px; }
        .nav-links a:hover { color: var(--primary); background: var(--primary-light); }
        .nav-links a.active {
            color: var(--primary);
            background: var(--primary-light);
            font-weight: 600;
        }
        .nav-search {
            display: flex;
            align-items: center;
            gap: 0;
            background: var(--bg-body);
            border-radius: 50px;
            border: 1.5px solid var(--border-color);
            overflow: hidden;
            transition: var(--transition);
            max-width: 240px;
            width: 100%;
        }
        .nav-search:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(255,107,0,0.12); }
        .nav-search input {
            flex: 1;
            border: none;
            background: transparent;
            padding: 8px 16px 8px 18px;
            font-size: 14px;
            color: var(--text-primary);
            outline: none;
            min-width: 0;
        }
        .nav-search input::placeholder { color: var(--text-light); }
        .nav-search button {
            padding: 8px 16px;
            color: var(--text-secondary);
            background: transparent;
            transition: var(--transition);
            font-size: 15px;
        }
        .nav-search button:hover { color: var(--primary); }
        .hamburger {
            display: none;
            padding: 8px 14px;
            font-size: 22px;
            color: var(--text-primary);
            background: var(--bg-body);
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .hamburger:hover { background: var(--primary-light); color: var(--primary); }

        /* ===== 文章页面包屑 ===== */
        .article-breadcrumb {
            padding: 20px 0 10px;
            font-size: 14px;
            color: var(--text-light);
        }
        .article-breadcrumb a { color: var(--text-secondary); }
        .article-breadcrumb a:hover { color: var(--primary); }
        .article-breadcrumb span { color: var(--text-light); margin: 0 6px; }

        /* ===== 文章主体 ===== */
        .article-wrapper {
            max-width: 860px;
            margin: 0 auto;
            padding: 30px 0 var(--section-gap);
        }
        .article-header {
            margin-bottom: 36px;
            text-align: center;
        }
        .article-header h1 {
            font-size: 42px;
            font-weight: 800;
            line-height: 1.25;
            color: var(--text-primary);
            margin-bottom: 16px;
            letter-spacing: -0.5px;
            position: relative;
            padding-bottom: 20px;
        }
        .article-header h1::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: 4px;
        }
        .article-meta {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
            margin-top: 18px;
            font-size: 14px;
            color: var(--text-secondary);
        }
        .article-meta i { margin-right: 5px; color: var(--primary); }
        .article-meta .category-tag {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            background: var(--primary-light);
            color: var(--primary);
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 13px;
            font-weight: 500;
        }
        .article-featured-image {
            margin: 30px 0 40px;
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            background: var(--bg-card);
        }
        .article-featured-image img {
            width: 100%;
            height: auto;
            max-height: 480px;
            object-fit: cover;
        }

        .article-content {
            font-size: 17px;
            line-height: 1.9;
            color: var(--text-primary);
            background: var(--bg-card);
            padding: 40px 48px;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
        }
        .article-content p { margin-bottom: 1.8em; }
        .article-content h2 { font-size: 28px; margin: 2em 0 1em; color: var(--text-primary); border-left: 5px solid var(--primary); padding-left: 16px; }
        .article-content h3 { font-size: 22px; margin: 1.8em 0 0.8em; color: var(--text-primary); }
        .article-content h4 { font-size: 18px; margin: 1.5em 0 0.6em; color: var(--text-primary); }
        .article-content ul, .article-content ol { margin: 1.2em 0 1.8em; padding-left: 28px; }
        .article-content ul li { list-style: disc; margin-bottom: 8px; }
        .article-content ol li { list-style: decimal; margin-bottom: 8px; }
        .article-content blockquote {
            border-left: 4px solid var(--primary);
            background: var(--primary-light);
            padding: 18px 24px;
            margin: 1.5em 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-content img {
            border-radius: var(--radius-sm);
            margin: 1.5em auto;
            box-shadow: var(--shadow-sm);
        }
        .article-content a { color: var(--primary); text-decoration: underline; text-underline-offset: 3px; }
        .article-content a:hover { color: var(--primary-hover); text-decoration-thickness: 2px; }

        /* ===== 空文章状态 ===== */
        .article-empty {
            text-align: center;
            padding: 80px 20px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
        }
        .article-empty i { font-size: 64px; color: var(--text-light); margin-bottom: 20px; display: block; }
        .article-empty h2 { font-size: 28px; color: var(--text-secondary); margin-bottom: 12px; }
        .article-empty p { color: var(--text-light); margin-bottom: 24px; font-size: 16px; }
        .article-empty .btn { display: inline-block; }

        /* ===== 相关推荐 ===== */
        .related-section {
            padding: var(--section-gap) 0;
            background: var(--bg-body);
        }
        .related-section .section-title {
            text-align: center;
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 40px;
            position: relative;
            padding-bottom: 16px;
            color: var(--text-primary);
        }
        .related-section .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid var(--border-color);
        }
        .related-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
        .related-card .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            background: var(--bg-body);
        }
        .related-card .card-body {
            padding: 20px 22px 24px;
        }
        .related-card .card-body h4 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-primary);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body .date {
            font-size: 13px;
            color: var(--text-light);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .related-card .card-body .date i { color: var(--primary); }

        /* ===== CTA 区 ===== */
        .article-cta {
            background: linear-gradient(135deg, var(--secondary) 0%, #0D1442 100%);
            padding: 60px 0;
            text-align: center;
            color: #fff;
        }
        .article-cta h2 { font-size: 32px; font-weight: 700; color: #fff; margin-bottom: 12px; }
        .article-cta p { font-size: 18px; color: rgba(255,255,255,0.8); margin-bottom: 28px; max-width: 600px; margin-left: auto; margin-right: auto; }
        .article-cta .btn-primary {
            background: var(--primary);
            color: #fff;
            padding: 14px 40px;
            font-size: 18px;
            font-weight: 600;
            border-radius: 50px;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            transition: var(--transition);
            box-shadow: 0 8px 24px rgba(255,107,0,0.35);
        }
        .article-cta .btn-primary:hover { background: var(--primary-hover); transform: translateY(-2px) scale(1.02); box-shadow: 0 12px 32px rgba(255,107,0,0.45); }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--footer-bg);
            color: rgba(255,255,255,0.7);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .footer-brand .site-logo { color: var(--accent) !important; font-size: 22px; margin-bottom: 16px; display: inline-flex; }
        .footer-brand p { font-size: 14px; line-height: 1.8; color: rgba(255,255,255,0.6); margin-top: 8px; }
        .footer-col h4 { color: #fff; font-size: 16px; font-weight: 600; margin-bottom: 18px; letter-spacing: 0.5px; }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul li a { color: rgba(255,255,255,0.6); font-size: 14px; transition: var(--transition); display: inline-flex; align-items: center; gap: 6px; }
        .footer-col ul li a:hover { color: var(--primary); transform: translateX(3px); }
        .footer-col ul li a i { font-size: 16px; width: 20px; }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
            font-size: 13px;
            color: rgba(255,255,255,0.4);
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom a { color: rgba(255,255,255,0.5); }
        .footer-bottom a:hover { color: var(--primary); }
        .footer-bottom span:last-child a { margin: 0 4px; }

        /* ===== 按钮通用 ===== */
        .btn { display: inline-flex; align-items: center; gap: 8px; font-weight: 500; border-radius: var(--radius-sm); transition: var(--transition); }
        .btn-sm { padding: 6px 18px; font-size: 14px; }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            padding: 12px 28px;
            font-size: 16px;
            font-weight: 600;
            border-radius: 8px;
            box-shadow: 0 4px 12px rgba(255,107,0,0.25);
        }
        .btn-primary:hover { background: var(--primary-hover); transform: translateY(-2px); box-shadow: 0 8px 20px rgba(255,107,0,0.35); color: #fff; }
        .btn-secondary {
            background: var(--secondary);
            color: #fff;
            padding: 12px 28px;
            font-size: 16px;
            font-weight: 600;
            border-radius: 8px;
        }
        .btn-secondary:hover { background: var(--secondary-hover); transform: translateY(-2px); color: #fff; }

        /* ===== 返回顶部 ===== */
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 48px;
            height: 48px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            box-shadow: var(--shadow-md);
            transition: var(--transition);
            z-index: 999;
            opacity: 0;
            visibility: hidden;
            transform: translateY(20px);
        }
        .back-to-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
        .back-to-top:hover { background: var(--primary-hover); transform: translateY(-4px); box-shadow: var(--shadow-lg); color: #fff; }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
            .related-grid { grid-template-columns: repeat(2, 1fr); }
        }

        @media (max-width: 768px) {
            :root { --section-gap: var(--section-gap-mobile); }
            .nav-links { display: none; }
            .hamburger { display: block; }
            .nav-links.mobile-open {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: var(--bg-card);
                padding: 16px 20px;
                box-shadow: var(--shadow-lg);
                border-radius: 0 0 var(--radius-md) var(--radius-md);
                z-index: 999;
                gap: 4px;
                border-top: 1px solid var(--border-color);
            }
            .nav-links.mobile-open a { padding: 12px 16px; width: 100%; border-radius: var(--radius-sm); }
            .nav-search { max-width: 160px; }
            .nav-search input { padding: 6px 10px; font-size: 13px; }

            .article-header h1 { font-size: 28px; }
            .article-content { padding: 24px 20px; font-size: 16px; }
            .article-content h2 { font-size: 24px; }
            .article-content h3 { font-size: 20px; }
            .article-wrapper { padding: 20px 0 var(--section-gap); }
            .article-meta { gap: 12px; font-size: 13px; }

            .related-grid { grid-template-columns: 1fr; gap: 20px; }
            .related-section .section-title { font-size: 26px; }
            .related-card .card-img { height: 180px; }

            .article-cta h2 { font-size: 24px; }
            .article-cta p { font-size: 16px; }
            .article-cta .btn-primary { padding: 12px 28px; font-size: 16px; }

            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .back-to-top { bottom: 20px; right: 20px; width: 42px; height: 42px; font-size: 18px; }
        }

        @media (max-width: 520px) {
            .nav-brand-row .container { flex-wrap: wrap; gap: 8px; }
            .site-logo { font-size: 20px; }
            .site-logo i { font-size: 22px; }
            .nav-brand-actions .btn { padding: 4px 12px; font-size: 12px; }
            .article-header h1 { font-size: 24px; }
            .article-meta { flex-direction: column; gap: 6px; }
            .article-content { padding: 16px 14px; }
            .article-content h2 { font-size: 22px; padding-left: 12px; }
            .related-card .card-img { height: 160px; }
        }

        /* Foundation 覆盖 */
        .grid-container { max-width: var(--container-max); padding-left: 20px; padding-right: 20px; }
        .site-header .grid-container { padding-left: 0; padding-right: 0; }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #FF6B00;
            --primary-hover: #E05A00;
            --primary-light: #FFF3E0;
            --secondary: #1A237E;
            --secondary-hover: #141B5E;
            --accent: #FFD600;
            --accent-hover: #E6C200;
            --bg: #F7F9FC;
            --card-bg: #FFFFFF;
            --text-primary: #1E293B;
            --text-secondary: #64748B;
            --text-light: #94A3B8;
            --border: #E2E8F0;
            --border-light: #F1F5F9;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 14px;
            --radius-xl: 20px;
            --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
            --transition: all 0.25s ease;
            --max-width: 1200px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-body);
            font-size: 16px;
            line-height: 1.6;
            color: var(--text-primary);
            background: var(--bg);
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
        }

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

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

        a:hover {
            color: var(--primary-hover);
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }

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

        /* ===== Container ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        @media screen and (max-width: 768px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* ===== Typography ===== */
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            margin-top: 0;
            color: var(--text-primary);
        }

        h1 {
            font-size: 48px;
        }
        h2 {
            font-size: 36px;
        }
        h3 {
            font-size: 24px;
        }
        h4 {
            font-size: 18px;
        }

        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }

        .section-title h2 {
            margin-bottom: 12px;
        }

        .section-title p {
            font-size: 18px;
            color: var(--text-secondary);
            max-width: 640px;
            margin: 0 auto;
        }

        @media screen and (max-width: 768px) {
            h1 {
                font-size: 32px;
            }
            h2 {
                font-size: 28px;
            }
            h3 {
                font-size: 20px;
            }
            h4 {
                font-size: 16px;
            }
            .section-title {
                margin-bottom: 32px;
            }
            .section-title p {
                font-size: 16px;
            }
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 16px;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
            line-height: 1.4;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(255, 107, 0, 0.35);
        }

        .btn-primary:hover {
            background: var(--primary-hover);
            color: #fff;
            box-shadow: 0 6px 20px rgba(255, 107, 0, 0.45);
            transform: translateY(-2px);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(255, 107, 0, 0.3);
        }

        .btn-secondary {
            background: var(--secondary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(26, 35, 126, 0.3);
        }

        .btn-secondary:hover {
            background: var(--secondary-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(26, 35, 126, 0.4);
        }

        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }

        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }

        .btn-accent {
            background: var(--accent);
            color: var(--text-primary);
            box-shadow: 0 4px 14px rgba(255, 214, 0, 0.35);
        }

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

        .btn-sm {
            padding: 8px 18px;
            font-size: 14px;
        }

        .btn-lg {
            padding: 16px 36px;
            font-size: 18px;
        }

        .btn-block {
            width: 100%;
            justify-content: center;
        }

        @media screen and (max-width: 768px) {
            .btn {
                padding: 10px 22px;
                font-size: 15px;
            }
            .btn-lg {
                padding: 14px 28px;
                font-size: 16px;
            }
            .btn-block-mobile {
                width: 100%;
                justify-content: center;
            }
        }

        /* ===== Badge / Tag ===== */
        .badge {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 50px;
            font-size: 13px;
            font-weight: 600;
            background: var(--primary-light);
            color: var(--primary);
        }

        .badge-accent {
            background: rgba(255, 214, 0, 0.2);
            color: #B8860B;
        }

        .badge-secondary {
            background: rgba(26, 35, 126, 0.1);
            color: var(--secondary);
        }

        /* ===== Card ===== */
        .card {
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            transition: var(--transition);
            overflow: hidden;
        }

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

        .card-body {
            padding: 24px;
        }

        @media screen and (max-width: 768px) {
            .card-body {
                padding: 16px;
            }
        }

        /* ===== Section Spacing ===== */
        .section {
            padding: 80px 0;
        }

        @media screen and (max-width: 768px) {
            .section {
                padding: 48px 0;
            }
        }

        /* ===== Header & Navigation ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
        }

        .nav-brand-row {
            background: var(--secondary);
            padding: 10px 0;
        }

        .nav-brand-row .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--accent);
            text-decoration: none;
        }

        .site-logo i {
            font-size: 26px;
            color: var(--primary);
        }

        .site-logo:hover {
            color: #fff;
        }

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

        .nav-brand-actions .btn-outline {
            border-color: rgba(255, 255, 255, 0.3);
            color: rgba(255, 255, 255, 0.9);
        }

        .nav-brand-actions .btn-outline:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.5);
            color: #fff;
        }

        .nav-channel-row {
            background: #fff;
            border-bottom: 1px solid var(--border);
            padding: 0;
        }

        .nav-channel-row .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 52px;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: none;
        }

        .nav-links::-webkit-scrollbar {
            display: none;
        }

        .nav-links a {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            white-space: nowrap;
            transition: var(--transition);
            text-decoration: none;
        }

        .nav-links a i {
            font-size: 14px;
        }

        .nav-links a:hover {
            color: var(--primary);
            background: var(--primary-light);
        }

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

        .nav-search {
            display: flex;
            align-items: center;
            gap: 0;
            margin-left: 16px;
            flex-shrink: 0;
        }

        .nav-search input {
            border: 1.5px solid var(--border);
            border-radius: 50px 0 0 50px;
            padding: 7px 14px;
            font-size: 14px;
            width: 180px;
            outline: none;
            transition: var(--transition);
            background: var(--bg);
        }

        .nav-search input:focus {
            border-color: var(--primary);
            background: #fff;
        }

        .nav-search button {
            border: 1.5px solid var(--border);
            border-left: none;
            border-radius: 0 50px 50px 0;
            padding: 7px 14px;
            background: var(--primary);
            color: #fff;
            cursor: pointer;
            transition: var(--transition);
        }

        .nav-search button:hover {
            background: var(--primary-hover);
        }

        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            color: var(--text-primary);
            cursor: pointer;
            padding: 4px 8px;
        }

        /* Mobile Nav Drawer */
        .mobile-drawer {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.5);
            z-index: 9999;
            opacity: 0;
            transition: opacity 0.3s ease;
            pointer-events: none;
        }

        .mobile-drawer.open {
            display: block;
            opacity: 1;
            pointer-events: auto;
        }

        .mobile-drawer-inner {
            position: absolute;
            top: 0;
            right: 0;
            width: 300px;
            height: 100%;
            background: #fff;
            padding: 24px 20px;
            box-shadow: -4px 0 20px rgba(0, 0, 0, 0.15);
            transform: translateX(100%);
            transition: transform 0.3s ease;
            overflow-y: auto;
        }

        .mobile-drawer.open .mobile-drawer-inner {
            transform: translateX(0);
        }

        .mobile-drawer-close {
            background: none;
            border: none;
            font-size: 28px;
            color: var(--text-primary);
            cursor: pointer;
            float: right;
            padding: 0 4px;
        }

        .mobile-drawer-links {
            margin-top: 40px;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .mobile-drawer-links a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 12px 16px;
            border-radius: var(--radius-md);
            font-size: 16px;
            font-weight: 500;
            color: var(--text-primary);
            text-decoration: none;
            transition: var(--transition);
        }

        .mobile-drawer-links a:hover {
            background: var(--primary-light);
            color: var(--primary);
        }

        .mobile-drawer-links a.active {
            background: var(--primary-light);
            color: var(--primary);
            font-weight: 600;
        }

        .mobile-drawer-actions {
            margin-top: 24px;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        @media screen and (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .nav-search {
                display: none;
            }
            .hamburger {
                display: block;
            }
            .nav-brand-actions .btn {
                padding: 6px 14px;
                font-size: 13px;
            }
            .site-logo {
                font-size: 18px;
            }
            .site-logo i {
                font-size: 20px;
            }
        }

        /* ===== Hero ===== */
        .category-hero {
            position: relative;
            background: linear-gradient(135deg, var(--secondary) 0%, #0D123E 100%);
            min-height: 360px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 80px 20px 60px;
            overflow: hidden;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            opacity: 0.15;
            pointer-events: none;
        }

        .category-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26, 35, 126, 0.85) 0%, rgba(13, 18, 62, 0.9) 100%);
            pointer-events: none;
        }

        .category-hero-content {
            position: relative;
            z-index: 1;
            max-width: 800px;
        }

        .category-hero-content .badge {
            background: rgba(255, 214, 0, 0.2);
            color: var(--accent);
            font-size: 14px;
            padding: 6px 18px;
            margin-bottom: 16px;
        }

        .category-hero-content h1 {
            color: #fff;
            font-size: 44px;
            margin-bottom: 16px;
            text-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
        }

        .category-hero-content p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 18px;
            line-height: 1.7;
            margin-bottom: 28px;
            max-width: 640px;
            margin-left: auto;
            margin-right: auto;
        }

        .category-hero-content .btn {
            margin: 4px 8px;
        }

        @media screen and (max-width: 768px) {
            .category-hero {
                min-height: 280px;
                padding: 60px 16px 40px;
            }
            .category-hero-content h1 {
                font-size: 28px;
            }
            .category-hero-content p {
                font-size: 16px;
            }
            .category-hero-content .btn {
                margin: 4px 4px;
            }
        }

        /* ===== Category Grid ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .category-card {
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            overflow: hidden;
            transition: var(--transition);
            cursor: pointer;
        }

        .category-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-6px);
        }

        .category-card-cover {
            height: 180px;
            background: var(--border-light);
            position: relative;
            overflow: hidden;
        }

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

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

        .category-card-cover .overlay-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--primary);
            color: #fff;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 13px;
            font-weight: 600;
        }

        .category-card-body {
            padding: 20px 22px 24px;
        }

        .category-card-body h3 {
            font-size: 20px;
            margin-bottom: 8px;
        }

        .category-card-body p {
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.6;
            margin-bottom: 14px;
        }

        .category-card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 14px;
            color: var(--text-light);
        }

        .category-card-meta span i {
            margin-right: 4px;
            color: var(--primary);
        }

        @media screen and (max-width: 1024px) {
            .category-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
        }

        @media screen and (max-width: 640px) {
            .category-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .category-card-cover {
                height: 160px;
            }
            .category-card-body {
                padding: 16px 18px 20px;
            }
            .category-card-body h3 {
                font-size: 18px;
            }
        }

        /* ===== Features Section ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .feature-item {
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid var(--border-light);
        }

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

        .feature-icon {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-size: 28px;
            color: var(--primary);
            transition: var(--transition);
        }

        .feature-item:hover .feature-icon {
            background: var(--primary);
            color: #fff;
            transform: scale(1.1);
        }

        .feature-item h4 {
            font-size: 18px;
            margin-bottom: 8px;
        }

        .feature-item p {
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.6;
            margin-bottom: 0;
        }

        @media screen and (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
        }

        @media screen and (max-width: 640px) {
            .features-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .feature-item {
                padding: 24px 18px;
            }
        }

        /* ===== Scenarios Section ===== */
        .scenarios-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .scenario-card {
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border-left: 4px solid var(--primary);
        }

        .scenario-card:nth-child(2) {
            border-left-color: var(--accent);
        }
        .scenario-card:nth-child(3) {
            border-left-color: var(--secondary);
        }

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

        .scenario-card .scenario-num {
            font-size: 32px;
            font-weight: 800;
            color: var(--primary-light);
            margin-bottom: 8px;
        }

        .scenario-card:nth-child(2) .scenario-num {
            color: rgba(255, 214, 0, 0.25);
        }
        .scenario-card:nth-child(3) .scenario-num {
            color: rgba(26, 35, 126, 0.12);
        }

        .scenario-card h4 {
            font-size: 18px;
            margin-bottom: 8px;
        }

        .scenario-card p {
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.7;
            margin-bottom: 0;
        }

        @media screen and (max-width: 1024px) {
            .scenarios-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
        }

        @media screen and (max-width: 640px) {
            .scenarios-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .scenario-card {
                padding: 24px 18px;
            }
        }

        /* ===== How It Works ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }

        .step-item {
            text-align: center;
            position: relative;
            padding: 32px 16px 24px;
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }

        .step-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }

        .step-item::before {
            counter-increment: step;
            content: counter(step);
            display: block;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 20px;
            font-weight: 800;
            line-height: 48px;
            text-align: center;
            margin: 0 auto 16px;
        }

        .step-item:nth-child(2)::before {
            background: var(--secondary);
        }
        .step-item:nth-child(3)::before {
            background: var(--accent);
            color: var(--text-primary);
        }
        .step-item:nth-child(4)::before {
            background: #10B981;
        }

        .step-item h4 {
            font-size: 17px;
            margin-bottom: 6px;
        }

        .step-item p {
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.6;
            margin-bottom: 0;
        }

        @media screen and (max-width: 1024px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
        }

        @media screen and (max-width: 640px) {
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .step-item {
                padding: 24px 16px 20px;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--card-bg);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: var(--transition);
            border: 1px solid var(--border-light);
        }

        .faq-item:hover {
            box-shadow: var(--shadow-md);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-weight: 600;
            font-size: 16px;
            cursor: pointer;
            user-select: none;
            transition: var(--transition);
            background: #fff;
        }

        .faq-question:hover {
            background: var(--primary-light);
        }

        .faq-question .faq-icon {
            font-size: 18px;
            color: var(--primary);
            transition: transform 0.3s ease;
            flex-shrink: 0;
            margin-left: 12px;
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 24px;
            background: var(--bg);
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 16px 24px 20px;
        }

        .faq-answer p {
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.7;
            margin-bottom: 0;
        }

        @media screen and (max-width: 768px) {
            .faq-question {
                padding: 14px 16px;
                font-size: 15px;
            }
            .faq-answer {
                padding: 0 16px;
            }
            .faq-item.open .faq-answer {
                padding: 12px 16px 16px;
            }
        }

        /* ===== CTA Section ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--secondary) 0%, #0D123E 100%);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.08;
            pointer-events: none;
        }

        .cta-content {
            position: relative;
            z-index: 1;
            text-align: center;
            max-width: 700px;
            margin: 0 auto;
        }

        .cta-content h2 {
            color: #fff;
            font-size: 36px;
            margin-bottom: 16px;
        }

        .cta-content p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 18px;
            line-height: 1.7;
            margin-bottom: 28px;
        }

        .cta-content .btn {
            margin: 4px 8px;
        }

        @media screen and (max-width: 768px) {
            .cta-content h2 {
                font-size: 26px;
            }
            .cta-content p {
                font-size: 16px;
            }
            .cta-content .btn {
                margin: 4px 4px;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0F172A;
            color: rgba(255, 255, 255, 0.7);
            padding: 56px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand .site-logo {
            font-size: 22px;
            margin-bottom: 16px;
            color: var(--accent);
        }

        .footer-brand .site-logo i {
            color: var(--primary);
        }

        .footer-brand p {
            font-size: 15px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            max-width: 360px;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 16px;
            margin-bottom: 16px;
            font-weight: 600;
        }

        .footer-col ul li {
            margin-bottom: 10px;
        }

        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 15px;
            text-decoration: none;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .footer-col ul li a:hover {
            color: var(--primary);
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 0;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.4);
            flex-wrap: wrap;
            gap: 8px;
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.4);
            text-decoration: none;
            transition: var(--transition);
        }

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

        @media screen and (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
        }

        @media screen and (max-width: 640px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-brand p {
                max-width: 100%;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .site-footer {
                padding: 36px 0 0;
            }
        }

        /* ===== Utility ===== */
        .text-center {
            text-align: center;
        }
        .mt-8 {
            margin-top: 8px;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .mb-8 {
            margin-bottom: 8px;
        }
        .mb-16 {
            margin-bottom: 16px;
        }
        .mb-24 {
            margin-bottom: 24px;
        }
        .gap-8 {
            gap: 8px;
        }
        .gap-12 {
            gap: 12px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .flex-wrap {
            flex-wrap: wrap;
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb {
            padding: 14px 0;
            background: #fff;
            border-bottom: 1px solid var(--border-light);
        }

        .breadcrumb .container {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            color: var(--text-light);
        }

        .breadcrumb a {
            color: var(--text-secondary);
            text-decoration: none;
        }

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

        .breadcrumb .sep {
            color: var(--text-light);
            font-size: 12px;
        }

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

        /* ===== Stats Row ===== */
        .stats-row {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            max-width: 900px;
            margin: 0 auto;
        }

        .stat-item {
            text-align: center;
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            padding: 28px 16px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }

        .stat-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }

        .stat-number {
            font-size: 48px;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
            margin-bottom: 4px;
        }

        .stat-label {
            font-size: 16px;
            color: var(--text-secondary);
            font-weight: 500;
        }

        @media screen and (max-width: 768px) {
            .stats-row {
                grid-template-columns: repeat(3, 1fr);
                gap: 12px;
            }
            .stat-number {
                font-size: 32px;
            }
            .stat-item {
                padding: 18px 10px;
            }
            .stat-label {
                font-size: 14px;
            }
        }

        @media screen and (max-width: 480px) {
            .stats-row {
                grid-template-columns: 1fr 1fr 1fr;
                gap: 8px;
            }
            .stat-number {
                font-size: 26px;
            }
        }

        /* ===== Divider ===== */
        .divider {
            width: 60px;
            height: 4px;
            background: var(--primary);
            border-radius: 4px;
            margin: 0 auto 16px;
        }

        .divider.secondary {
            background: var(--secondary);
        }

        /* ===== Back to Top ===== */
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            box-shadow: var(--shadow-md);
            cursor: pointer;
            transition: var(--transition);
            opacity: 0;
            pointer-events: none;
            z-index: 999;
            border: none;
        }

        .back-to-top.show {
            opacity: 1;
            pointer-events: auto;
        }

        .back-to-top:hover {
            background: var(--primary-hover);
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }

        @media screen and (max-width: 768px) {
            .back-to-top {
                bottom: 16px;
                right: 16px;
                width: 40px;
                height: 40px;
                font-size: 16px;
            }
        }