/* roulang page: index */
:root {
            --primary: #0a1628;
            --primary-light: #1a2a5e;
            --primary-mid: #14203e;
            --accent: #f0a500;
            --accent-dark: #d48c00;
            --accent-light: #fbbf24;
            --highlight: #e85d04;
            --bg-light: #f8fafc;
            --bg-white: #ffffff;
            --text-primary: #1e293b;
            --text-secondary: #4b5563;
            --text-muted: #94a3b8;
            --border-color: #e2e8f0;
            --border-light: #f1f5f9;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.08), 0 2px 4px rgba(0,0,0,0.04);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.10);
            --shadow-xl: 0 20px 60px rgba(0,0,0,0.14);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', sans-serif;
            --container-max: 1200px;
            --header-height: 72px;
        }

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

        html { scroll-behavior: smooth; }

        body {
            font-family: var(--font-sans);
            color: var(--text-primary);
            background: var(--bg-light);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--accent-dark); }
        a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 2px; }
        button, input, textarea { font-family: inherit; }
        ul, ol { list-style: none; }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        .section-padding { padding: 80px 0; }
        .section-padding-sm { padding: 48px 0; }

        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--primary);
            text-align: center;
            margin-bottom: 12px;
            letter-spacing: -0.02em;
        }

        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-secondary);
            text-align: center;
            max-width: 680px;
            margin: 0 auto 48px auto;
            line-height: 1.6;
        }

        .section-subtitle.left { text-align: left; margin-left: 0; }

        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 100px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            background: var(--accent);
            color: var(--primary);
            transition: var(--transition);
        }

        .badge-sm { font-size: 0.7rem; padding: 2px 10px; }

        .badge-outline {
            background: transparent;
            border: 1.5px solid var(--accent);
            color: var(--accent);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            border-radius: 100px;
            font-weight: 600;
            font-size: 0.95rem;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            line-height: 1.4;
            text-decoration: none;
        }

        .btn-primary {
            background: var(--accent);
            color: var(--primary);
            box-shadow: 0 4px 14px rgba(240, 165, 0, 0.35);
        }
        .btn-primary:hover { background: var(--accent-dark); color: var(--primary); transform: translateY(-2px); box-shadow: 0 8px 28px rgba(240, 165, 0, 0.40); }
        .btn-primary:active { transform: translateY(0); box-shadow: 0 2px 8px rgba(240, 165, 0, 0.30); }

        .btn-secondary {
            background: transparent;
            color: var(--bg-white);
            border: 2px solid rgba(255,255,255,0.5);
        }
        .btn-secondary:hover { background: rgba(255,255,255,0.12); border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }

        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }
        .btn-outline:hover { background: var(--primary); color: var(--bg-white); transform: translateY(-2px); }

        .btn-lg { padding: 16px 44px; font-size: 1.1rem; }
        .btn-sm { padding: 8px 20px; font-size: 0.85rem; }

        /* ===== HEADER / NAV ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(10, 22, 40, 0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(255,255,255,0.06);
            height: var(--header-height);
            transition: var(--transition);
        }

        .header-inner {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }

        .site-logo {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--bg-white);
            letter-spacing: -0.03em;
            display: flex;
            align-items: center;
            gap: 6px;
            flex-shrink: 0;
        }
        .site-logo:hover { color: var(--accent); }
        .site-logo i { color: var(--accent); font-size: 1.1rem; }

        .nav-tabs {
            display: flex;
            align-items: center;
            gap: 6px;
            background: rgba(255,255,255,0.06);
            padding: 4px;
            border-radius: 100px;
        }

        .nav-tabs a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 22px;
            border-radius: 100px;
            font-size: 0.9rem;
            font-weight: 500;
            color: rgba(255,255,255,0.7);
            transition: var(--transition);
            text-decoration: none;
            white-space: nowrap;
        }

        .nav-tabs a:hover { color: var(--bg-white); background: rgba(255,255,255,0.08); }
        .nav-tabs a.active { background: var(--accent); color: var(--primary); font-weight: 600; box-shadow: 0 2px 12px rgba(240,165,0,0.30); }
        .nav-tabs a.active:hover { background: var(--accent-dark); color: var(--primary); }

        .nav-cta {
            margin-left: 12px;
        }
        .nav-cta .btn { padding: 8px 24px; font-size: 0.85rem; }

        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--bg-white);
            font-size: 1.5rem;
            cursor: pointer;
            padding: 4px 8px;
        }

        /* ===== HERO ===== */
        .hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            padding-top: var(--header-height);
            overflow: hidden;
            background: var(--primary);
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center center;
            opacity: 0.35;
            z-index: 1;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10,22,40,0.88) 0%, rgba(10,22,40,0.60) 60%, rgba(10,22,40,0.40) 100%);
            z-index: 2;
        }

        .hero-content {
            position: relative;
            z-index: 3;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 80px 24px;
            width: 100%;
        }

        .hero-badge {
            display: inline-block;
            padding: 6px 18px;
            border-radius: 100px;
            background: rgba(240, 165, 0, 0.18);
            color: var(--accent-light);
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            margin-bottom: 24px;
            border: 1px solid rgba(240, 165, 0, 0.25);
        }

        .hero h1 {
            font-size: 3.8rem;
            font-weight: 800;
            color: var(--bg-white);
            line-height: 1.15;
            letter-spacing: -0.03em;
            margin-bottom: 20px;
            max-width: 800px;
        }

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

        .hero-desc {
            font-size: 1.2rem;
            color: rgba(255,255,255,0.8);
            max-width: 600px;
            line-height: 1.7;
            margin-bottom: 36px;
        }

        .hero-actions { display: flex; flex-wrap: wrap; gap: 16px; align-items: center; }

        .hero-stats {
            display: flex;
            gap: 40px;
            margin-top: 56px;
            flex-wrap: wrap;
        }

        .hero-stat-item h3 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--accent);
            line-height: 1.2;
        }

        .hero-stat-item p {
            font-size: 0.9rem;
            color: rgba(255,255,255,0.6);
            margin-top: 2px;
        }

        /* ===== FEATURES ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }

        .feature-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 36px 28px 32px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid var(--border-light);
            text-align: center;
        }

        .feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--accent); }

        .feature-icon {
            width: 64px;
            height: 64px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 1.8rem;
            color: var(--bg-white);
            background: var(--primary);
        }

        .feature-card:nth-child(1) .feature-icon { background: #1a2a5e; }
        .feature-card:nth-child(2) .feature-icon { background: #1e3a8a; }
        .feature-card:nth-child(3) .feature-icon { background: #0f172a; }
        .feature-card:nth-child(4) .feature-icon { background: #2d1b69; }

        .feature-card h3 { font-size: 1.15rem; font-weight: 700; color: var(--primary); margin-bottom: 8px; }
        .feature-card p { font-size: 0.92rem; color: var(--text-secondary); line-height: 1.6; }

        /* ===== CATEGORIES / COVERS ===== */
        .categories-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .category-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            background: var(--bg-white);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            cursor: pointer;
            border: 1px solid var(--border-light);
        }

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

        .category-card .cover-wrap {
            height: 200px;
            overflow: hidden;
            position: relative;
        }

        .category-card .cover-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }

        .category-card:hover .cover-wrap img { transform: scale(1.06); }

        .category-card .cover-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: 20px 24px 16px;
            background: linear-gradient(transparent, rgba(0,0,0,0.7));
            color: var(--bg-white);
        }

        .category-card .cover-overlay h3 { font-size: 1.2rem; font-weight: 700; margin: 0; }
        .category-card .cover-overlay p { font-size: 0.85rem; opacity: 0.85; margin: 4px 0 0; }

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

        .category-card .card-body .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            margin-bottom: 10px;
        }

        .category-card .card-body .tag-list span {
            padding: 2px 12px;
            border-radius: 100px;
            font-size: 0.75rem;
            font-weight: 500;
            background: var(--border-light);
            color: var(--text-secondary);
        }

        .category-card .card-body p { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.6; }

        .category-card .card-footer {
            padding: 16px 24px;
            border-top: 1px solid var(--border-light);
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .category-card .card-footer .btn { padding: 6px 18px; font-size: 0.82rem; }

        /* ===== STATISTICS ===== */
        .stats-section {
            background: var(--primary);
            background-image: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            position: relative;
            overflow: hidden;
        }

        .stats-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.08;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            position: relative;
            z-index: 1;
        }

        .stat-item {
            text-align: center;
            padding: 32px 16px;
            background: rgba(255,255,255,0.04);
            border-radius: var(--radius-md);
            border: 1px solid rgba(255,255,255,0.06);
            transition: var(--transition);
        }

        .stat-item:hover { background: rgba(255,255,255,0.08); border-color: rgba(240,165,0,0.25); }

        .stat-item .number {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
        }

        .stat-item .label {
            font-size: 0.95rem;
            color: rgba(255,255,255,0.7);
            margin-top: 6px;
        }

        /* ===== NEWS / CMS LIST ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }

        .news-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid var(--border-light);
            display: flex;
            flex-direction: column;
        }

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

        .news-card .news-img {
            height: 180px;
            overflow: hidden;
            background: var(--border-light);
        }

        .news-card .news-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }

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

        .news-card .news-body {
            padding: 24px 24px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .news-card .news-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.82rem;
            color: var(--text-muted);
            margin-bottom: 10px;
        }

        .news-card .news-meta .cat-tag {
            background: var(--primary);
            color: var(--bg-white);
            padding: 2px 12px;
            border-radius: 100px;
            font-size: 0.72rem;
            font-weight: 600;
        }

        .news-card .news-body h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.4;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-card .news-body p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-card .news-body .news-date {
            margin-top: 12px;
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        .empty-news {
            grid-column: 1 / -1;
            text-align: center;
            padding: 60px 24px;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            border: 1px dashed var(--border-color);
            color: var(--text-muted);
            font-size: 1.05rem;
        }

        /* ===== TESTIMONIALS / SOCIAL PROOF ===== */
        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .testimonial-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 32px 28px 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }

        .testimonial-card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }

        .testimonial-card .stars {
            color: var(--accent);
            font-size: 0.95rem;
            margin-bottom: 14px;
            letter-spacing: 2px;
        }

        .testimonial-card blockquote {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0 0 18px 0;
            font-style: normal;
        }

        .testimonial-card .user {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .testimonial-card .user .avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--border-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: var(--text-muted);
            font-weight: 600;
        }

        .testimonial-card .user .name { font-weight: 600; font-size: 0.9rem; color: var(--primary); }
        .testimonial-card .user .role { font-size: 0.8rem; color: var(--text-muted); }

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

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

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

        .faq-question {
            padding: 20px 28px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            transition: var(--transition);
            gap: 16px;
        }

        .faq-question i { font-size: 0.85rem; color: var(--text-muted); transition: var(--transition); flex-shrink: 0; }
        .faq-question.open i { transform: rotate(180deg); color: var(--accent); }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 28px;
        }

        .faq-answer.open {
            max-height: 300px;
            padding: 0 28px 20px;
        }

        .faq-answer p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

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

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.06;
        }

        .cta-content {
            position: relative;
            z-index: 1;
            text-align: center;
            padding: 20px 0;
        }

        .cta-content h2 {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--bg-white);
            margin-bottom: 16px;
        }

        .cta-content p {
            font-size: 1.1rem;
            color: rgba(255,255,255,0.75);
            max-width: 600px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }

        .cta-content .btn { box-shadow: 0 8px 32px rgba(240, 165, 0, 0.40); }

        /* ===== FOOTER ===== */
        .site-footer {
            background: var(--primary);
            border-top: 1px solid rgba(255,255,255,0.06);
            padding: 48px 0 24px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }

        .footer-brand .site-logo { font-size: 1.4rem; margin-bottom: 14px; }
        .footer-brand p {
            font-size: 0.9rem;
            color: rgba(255,255,255,0.6);
            line-height: 1.7;
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--bg-white);
            margin-bottom: 16px;
        }

        .footer-col ul li { margin-bottom: 8px; }
        .footer-col ul li a {
            font-size: 0.88rem;
            color: rgba(255,255,255,0.55);
            transition: var(--transition);
        }
        .footer-col ul li a:hover { color: var(--accent); padding-left: 4px; }

        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.06);
            padding-top: 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.4);
        }

        .footer-bottom a { color: rgba(255,255,255,0.5); }
        .footer-bottom a:hover { color: var(--accent); }

        /* ===== RESPONSIVE ===== */
        @media (max-width: 1024px) {
            .features-grid { grid-template-columns: repeat(2, 1fr); }
            .categories-grid { grid-template-columns: repeat(2, 1fr); }
            .testimonials-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: repeat(2, 1fr); }
            .hero h1 { font-size: 3rem; }
        }

        @media (max-width: 768px) {
            .section-padding { padding: 56px 0; }
            .section-title { font-size: 1.7rem; }
            .section-subtitle { font-size: 1rem; margin-bottom: 32px; }

            .mobile-toggle { display: block; }
            .nav-tabs {
                display: none;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                flex-direction: column;
                background: rgba(10,22,40,0.98);
                backdrop-filter: blur(20px);
                border-radius: 0 0 var(--radius-lg) var(--radius-lg);
                padding: 16px 24px;
                gap: 8px;
                border-bottom: 1px solid rgba(255,255,255,0.06);
            }
            .nav-tabs.open { display: flex; }
            .nav-tabs a { padding: 12px 20px; width: 100%; justify-content: center; }
            .nav-cta { display: none; }

            .hero { min-height: auto; }
            .hero h1 { font-size: 2.2rem; }
            .hero-desc { font-size: 1rem; }
            .hero-stats { gap: 24px; margin-top: 36px; }
            .hero-stat-item h3 { font-size: 1.5rem; }
            .hero-content { padding: 60px 24px 48px; }

            .features-grid { grid-template-columns: 1fr; gap: 20px; }
            .categories-grid { grid-template-columns: 1fr; gap: 20px; }
            .news-grid { grid-template-columns: 1fr; gap: 20px; }
            .testimonials-grid { grid-template-columns: 1fr; gap: 20px; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }

            .cta-content h2 { font-size: 1.8rem; }
            .cta-content p { font-size: 1rem; }

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

        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .hero h1 { font-size: 1.8rem; }
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
            .stat-item .number { font-size: 2rem; }
            .section-title { font-size: 1.5rem; }
            .hero-actions { flex-direction: column; width: 100%; }
            .hero-actions .btn { width: 100%; justify-content: center; }
            .faq-question { padding: 16px 20px; font-size: 0.95rem; }
            .faq-answer { padding: 0 20px; }
            .faq-answer.open { padding: 0 20px 16px; }
            .news-card .news-img { height: 140px; }
            .category-card .cover-wrap { height: 160px; }
        }

        /* ===== UTILITY ===== */
        .text-accent { color: var(--accent); }
        .bg-accent { background: var(--accent); }
        .text-center { text-align: center; }
        .mt-12 { margin-top: 12px; }
        .mt-24 { margin-top: 24px; }
        .mt-32 { margin-top: 32px; }
        .mb-12 { margin-bottom: 12px; }
        .mb-24 { margin-bottom: 24px; }
        .mb-32 { margin-bottom: 32px; }
        .gap-16 { gap: 16px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }

        .tag-group {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin: 16px 0;
        }

        .tag-group .tag {
            padding: 4px 16px;
            border-radius: 100px;
            font-size: 0.8rem;
            font-weight: 500;
            background: var(--border-light);
            color: var(--text-secondary);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            cursor: default;
        }

        .tag-group .tag:hover { background: var(--accent); color: var(--primary); border-color: var(--accent); }

        .divider {
            height: 1px;
            background: var(--border-color);
            margin: 48px 0;
        }

/* roulang page: article */
:root {
            --primary: #e63946;
            --primary-dark: #c1121f;
            --primary-light: #ff6b6b;
            --secondary: #1d3557;
            --secondary-light: #457b9d;
            --accent: #f4a261;
            --bg: #f8f9fa;
            --bg-alt: #ffffff;
            --text: #1a1a2e;
            --text-light: #6c757d;
            --text-white: #ffffff;
            --border: #e0e0e0;
            --border-light: #f0f0f0;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
            --shadow-hover: 0 8px 30px rgba(230, 57, 70, 0.15);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --max-width: 1200px;
            --header-h: 72px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font);
            color: var(--text);
            background: var(--bg);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Header / Nav ===== */
        .site-header {
            background: var(--bg-alt);
            border-bottom: 1px solid var(--border-light);
            position: sticky;
            top: 0;
            z-index: 1000;
            height: var(--header-h);
            display: flex;
            align-items: center;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
        }

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

        .site-logo {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--secondary);
            display: flex;
            align-items: center;
            gap: 8px;
            letter-spacing: -0.5px;
        }
        .site-logo i {
            color: var(--primary);
            font-size: 1.4rem;
        }
        .site-logo:hover {
            color: var(--primary);
        }

        .nav-tabs {
            display: flex;
            align-items: center;
            gap: 4px;
            background: var(--bg);
            padding: 4px;
            border-radius: 40px;
            border: 1px solid var(--border-light);
        }

        .nav-tabs a {
            padding: 8px 20px;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-light);
            display: flex;
            align-items: center;
            gap: 6px;
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-tabs a i {
            font-size: 0.85rem;
        }
        .nav-tabs a:hover {
            color: var(--secondary);
            background: rgba(29, 53, 87, 0.06);
        }
        .nav-tabs a.active {
            background: var(--secondary);
            color: var(--text-white);
            box-shadow: 0 4px 12px rgba(29, 53, 87, 0.25);
        }
        .nav-tabs a.active:hover {
            background: var(--secondary-light);
        }

        .nav-cta {
            background: var(--primary);
            color: var(--text-white) !important;
            padding: 8px 22px !important;
            border-radius: 30px !important;
            font-weight: 600 !important;
            box-shadow: 0 4px 12px rgba(230, 57, 70, 0.3);
        }
        .nav-cta:hover {
            background: var(--primary-dark) !important;
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(230, 57, 70, 0.4) !important;
        }

        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.6rem;
            color: var(--secondary);
            cursor: pointer;
            padding: 4px 8px;
            border-radius: var(--radius-sm);
        }
        .mobile-menu-toggle:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        @media (max-width: 768px) {
            .mobile-menu-toggle {
                display: block;
            }
            .nav-tabs {
                display: none;
                position: absolute;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: var(--bg-alt);
                flex-direction: column;
                padding: 12px 16px;
                border-radius: 0 0 var(--radius) var(--radius);
                border: 1px solid var(--border-light);
                border-top: none;
                box-shadow: var(--shadow-lg);
                gap: 6px;
            }
            .nav-tabs.open {
                display: flex;
            }
            .nav-tabs a {
                width: 100%;
                justify-content: center;
                padding: 12px 16px;
            }
            .nav-cta {
                text-align: center;
            }
            .site-logo {
                font-size: 1.25rem;
            }
        }

        @media (max-width: 520px) {
            .site-logo span {
                display: none;
            }
            .site-logo i {
                font-size: 1.6rem;
            }
        }

        /* ===== Article Hero ===== */
        .article-hero {
            background: linear-gradient(135deg, var(--secondary) 0%, #0d1b2a 100%);
            padding: 60px 0 50px;
            position: relative;
            overflow: hidden;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            opacity: 0.15;
            z-index: 0;
        }
        .article-hero .container {
            position: relative;
            z-index: 1;
        }
        .article-hero h1 {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--text-white);
            line-height: 1.3;
            max-width: 860px;
            margin-bottom: 16px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px 28px;
            color: rgba(255, 255, 255, 0.8);
            font-size: 0.95rem;
        }
        .article-meta span {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-meta i {
            color: var(--accent);
        }
        .article-meta .category-badge {
            background: var(--primary);
            color: var(--text-white);
            padding: 3px 14px;
            border-radius: 30px;
            font-size: 0.8rem;
            font-weight: 600;
        }

        @media (max-width: 768px) {
            .article-hero {
                padding: 40px 0 36px;
            }
            .article-hero h1 {
                font-size: 1.6rem;
            }
            .article-meta {
                gap: 10px 18px;
                font-size: 0.85rem;
            }
        }

        @media (max-width: 520px) {
            .article-hero h1 {
                font-size: 1.3rem;
            }
        }

        /* ===== Article Content ===== */
        .article-main {
            padding: 50px 0 60px;
        }

        .article-body {
            background: var(--bg-alt);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 40px 48px;
            max-width: 860px;
            margin: 0 auto;
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--text);
        }

        .article-body h2,
        .article-body h3,
        .article-body h4 {
            color: var(--secondary);
            margin-top: 32px;
            margin-bottom: 16px;
            font-weight: 700;
            line-height: 1.4;
        }
        .article-body h2 {
            font-size: 1.6rem;
            border-bottom: 2px solid var(--border-light);
            padding-bottom: 8px;
        }
        .article-body h3 {
            font-size: 1.3rem;
        }
        .article-body p {
            margin-bottom: 18px;
        }
        .article-body ul,
        .article-body ol {
            margin-bottom: 18px;
            padding-left: 24px;
        }
        .article-body li {
            margin-bottom: 8px;
        }
        .article-body a {
            color: var(--primary);
            font-weight: 500;
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .article-body a:hover {
            color: var(--primary-dark);
        }
        .article-body blockquote {
            border-left: 4px solid var(--primary);
            background: var(--bg);
            padding: 16px 24px;
            margin: 24px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            font-style: italic;
            color: var(--text-light);
        }
        .article-body img {
            border-radius: var(--radius-sm);
            margin: 24px 0;
            box-shadow: var(--shadow);
        }
        .article-body .tag-group {
            margin-top: 32px;
            padding-top: 20px;
            border-top: 1px solid var(--border-light);
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .article-body .tag {
            background: var(--bg);
            padding: 4px 16px;
            border-radius: 30px;
            font-size: 0.85rem;
            color: var(--text-light);
            border: 1px solid var(--border);
        }

        .article-not-found {
            text-align: center;
            padding: 80px 24px;
            background: var(--bg-alt);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            max-width: 600px;
            margin: 0 auto;
        }
        .article-not-found i {
            font-size: 3rem;
            color: var(--text-light);
            margin-bottom: 16px;
        }
        .article-not-found h2 {
            font-size: 1.8rem;
            color: var(--secondary);
            margin-bottom: 12px;
        }
        .article-not-found p {
            color: var(--text-light);
            margin-bottom: 24px;
        }
        .article-not-found .btn {
            display: inline-block;
            padding: 12px 32px;
            background: var(--primary);
            color: var(--text-white);
            border-radius: 30px;
            font-weight: 600;
        }
        .article-not-found .btn:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }

        @media (max-width: 768px) {
            .article-body {
                padding: 24px 20px;
                font-size: 1rem;
            }
            .article-body h2 {
                font-size: 1.3rem;
            }
            .article-body h3 {
                font-size: 1.15rem;
            }
        }

        /* ===== Related / CTA ===== */
        .article-cta {
            background: linear-gradient(135deg, var(--secondary) 0%, #0d1b2a 100%);
            padding: 50px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .article-cta::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.webp') center center / cover no-repeat;
            opacity: 0.1;
            z-index: 0;
        }
        .article-cta .container {
            position: relative;
            z-index: 1;
        }
        .article-cta h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 12px;
        }
        .article-cta p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto 28px;
        }
        .article-cta .btn-group {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .article-cta .btn-primary {
            background: var(--primary);
            color: var(--text-white);
            padding: 14px 36px;
            border-radius: 30px;
            font-weight: 600;
            font-size: 1rem;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .article-cta .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }
        .article-cta .btn-outline {
            background: transparent;
            color: var(--text-white);
            padding: 14px 36px;
            border-radius: 30px;
            font-weight: 600;
            font-size: 1rem;
            border: 2px solid rgba(255, 255, 255, 0.4);
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .article-cta .btn-outline:hover {
            border-color: var(--text-white);
            background: rgba(255, 255, 255, 0.08);
            transform: translateY(-2px);
        }

        @media (max-width: 768px) {
            .article-cta h2 {
                font-size: 1.5rem;
            }
            .article-cta p {
                font-size: 0.95rem;
            }
            .article-cta .btn-primary,
            .article-cta .btn-outline {
                padding: 12px 28px;
                font-size: 0.9rem;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--secondary);
            color: rgba(255, 255, 255, 0.85);
            padding: 50px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 36px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        .footer-brand .site-logo {
            color: var(--text-white);
            font-size: 1.4rem;
            margin-bottom: 12px;
            display: inline-flex;
        }
        .footer-brand .site-logo i {
            color: var(--primary-light);
        }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.65);
            max-width: 380px;
        }
        .footer-col h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-white);
            margin-bottom: 16px;
            position: relative;
            padding-bottom: 8px;
        }
        .footer-col h4::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 30px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.65);
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            gap: 6px;
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--text-white);
            transform: translateX(4px);
        }
        .footer-col ul li a i {
            font-size: 0.85rem;
            width: 18px;
            color: var(--primary-light);
        }
        .tag-group .tag {
            background: rgba(255, 255, 255, 0.1);
            color: rgba(255, 255, 255, 0.8);
            padding: 4px 14px;
            border-radius: 30px;
            font-size: 0.8rem;
            border: 1px solid rgba(255, 255, 255, 0.08);
            display: inline-block;
            margin: 2px 4px 2px 0;
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.6);
        }
        .footer-bottom a:hover {
            color: var(--text-white);
        }

        @media (max-width: 968px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
        }

        @media (max-width: 640px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

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

        /* ===== Breadcrumb ===== */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-light);
            padding: 14px 0 0;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--text-light);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .sep {
            color: var(--border);
        }
        .breadcrumb .current {
            color: var(--text);
            font-weight: 500;
        }

        @media (max-width: 520px) {
            .breadcrumb {
                font-size: 0.8rem;
            }
        }

/* roulang page: category1 */
/* ========== 设计变量 ========== */
        :root {
            --primary: #1565C0;
            --primary-dark: #0D47A1;
            --primary-light: #42A5F5;
            --accent: #FF8F00;
            --accent-dark: #FF6F00;
            --accent-light: #FFC107;
            --bg: #F0F4F8;
            --bg-card: #FFFFFF;
            --bg-dark: #0D1B2A;
            --bg-section-alt: #E8EEF5;
            --text: #1A1A2E;
            --text-light: #5A6A7E;
            --text-white: #F5F7FA;
            --border: #DEE5ED;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 8px 24px rgba(0,0,0,0.08);
            --shadow-lg: 0 16px 48px rgba(0,0,0,0.12);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
            --max-width: 1200px;
            --header-h: 72px;
        }

        /* ========== Reset / Base ========== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            margin: 0;
            padding: 0;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-dark); }
        ul, ol { list-style: none; padding: 0; margin: 0; }
        h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.3; color: var(--text); margin: 0 0 0.5em; }
        h1 { font-size: 2.6rem; }
        h2 { font-size: 2rem; }
        h3 { font-size: 1.4rem; }
        h4 { font-size: 1.15rem; }
        p { margin: 0 0 1em; color: var(--text-light); }
        .container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
        .section-pad { padding: 80px 0; }

        /* ========== 导航 ========== */
        .site-header {
            background: var(--bg-card);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 1000;
            height: var(--header-h);
            display: flex;
            align-items: center;
            box-shadow: var(--shadow-sm);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            flex-wrap: nowrap;
        }
        .site-logo {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--primary-dark);
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .site-logo i { color: var(--accent); font-size: 1.3em; }
        .site-logo:hover { color: var(--primary); }

        .nav-tabs {
            display: flex;
            align-items: center;
            gap: 6px;
            background: var(--bg);
            padding: 4px;
            border-radius: var(--radius-xl);
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
            flex-shrink: 1;
            min-width: 0;
        }
        .nav-tabs::-webkit-scrollbar { display: none; }
        .nav-tabs a {
            padding: 8px 20px;
            border-radius: var(--radius-xl);
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-light);
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
            flex-shrink: 0;
        }
        .nav-tabs a i { font-size: 0.9em; }
        .nav-tabs a:hover { color: var(--primary); background: rgba(21,101,192,0.08); }
        .nav-tabs a.active {
            background: var(--primary);
            color: #fff;
            box-shadow: var(--shadow-sm);
        }
        .nav-tabs a.active:hover { background: var(--primary-dark); color: #fff; }

        .nav-cta {
            flex-shrink: 0;
            margin-left: 12px;
        }
        .nav-cta .btn-primary {
            padding: 10px 24px;
            border-radius: var(--radius-xl);
            font-size: 0.9rem;
            font-weight: 600;
            background: var(--accent);
            color: #fff;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }
        .nav-cta .btn-primary:hover { background: var(--accent-dark); transform: translateY(-1px); box-shadow: var(--shadow-md); }

        /* 移动端菜单按钮（隐藏） */
        .mobile-menu-btn { display: none; background: none; border: none; font-size: 1.5rem; color: var(--text); cursor: pointer; padding: 4px; }

        /* ========== Hero ========== */
        .hero-section {
            position: relative;
            min-height: 75vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            background: var(--bg-dark);
            overflow: hidden;
            padding: 120px 0 100px;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            filter: brightness(0.35) saturate(0.9);
            z-index: 0;
            transform: scale(1.05);
            transition: transform 0.6s ease;
        }
        .hero-section:hover .hero-bg { transform: scale(1.0); }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(13,27,42,0.85) 0%, rgba(21,101,192,0.45) 100%);
            z-index: 1;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 820px;
            padding: 0 24px;
        }
        .hero-content h1 {
            font-size: 3.2rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 20px;
            letter-spacing: -0.02em;
            text-shadow: 0 4px 20px rgba(0,0,0,0.3);
        }
        .hero-content h1 i { color: var(--accent); }
        .hero-content .hero-sub {
            font-size: 1.25rem;
            color: rgba(255,255,255,0.85);
            margin-bottom: 32px;
            line-height: 1.7;
            max-width: 680px;
            margin-left: auto;
            margin-right: auto;
        }
        .hero-actions { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; }
        .hero-actions .btn-hero {
            padding: 16px 40px;
            border-radius: var(--radius-xl);
            font-size: 1.05rem;
            font-weight: 700;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .hero-actions .btn-hero.primary {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 8px 24px rgba(255,143,0,0.35);
        }
        .hero-actions .btn-hero.primary:hover { background: var(--accent-dark); transform: translateY(-3px); box-shadow: 0 12px 32px rgba(255,143,0,0.45); }
        .hero-actions .btn-hero.outline {
            background: transparent;
            color: var(--text-white);
            border: 2px solid rgba(255,255,255,0.4);
        }
        .hero-actions .btn-hero.outline:hover { border-color: var(--accent); background: rgba(255,143,0,0.12); transform: translateY(-3px); }

        .hero-stats {
            display: flex;
            gap: 48px;
            justify-content: center;
            margin-top: 48px;
            flex-wrap: wrap;
        }
        .hero-stats .stat-item { text-align: center; }
        .hero-stats .stat-num { font-size: 2rem; font-weight: 800; color: var(--accent-light); display: block; line-height: 1.2; }
        .hero-stats .stat-label { font-size: 0.85rem; color: rgba(255,255,255,0.7); margin-top: 4px; }

        /* ========== 板块通用 ========== */
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 { font-size: 2rem; font-weight: 700; color: var(--text); margin-bottom: 12px; }
        .section-title h2 i { color: var(--accent); }
        .section-title p { font-size: 1.05rem; color: var(--text-light); max-width: 600px; margin: 0 auto; }
        .section-alt { background: var(--bg-section-alt); }
        .section-white { background: var(--bg-card); }

        /* ========== 核心优势卡片 ========== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .feature-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid var(--border);
        }
        .feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--primary-light); }
        .feature-card .icon-wrap {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary-light), var(--primary));
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            font-size: 1.6rem;
            color: #fff;
        }
        .feature-card h3 { font-size: 1.15rem; font-weight: 600; margin-bottom: 8px; }
        .feature-card p { font-size: 0.92rem; color: var(--text-light); margin: 0; }

        /* ========== 赛事分类标签 ========== */
        .sports-tag-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
            margin: 32px 0 0;
        }
        .sports-tag {
            padding: 10px 28px;
            border-radius: var(--radius-xl);
            background: var(--bg-card);
            border: 1px solid var(--border);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text);
            display: inline-flex;
            align-items: center;
            gap: 10px;
            transition: var(--transition);
            cursor: default;
        }
        .sports-tag i { color: var(--accent); font-size: 1.1em; }
        .sports-tag:hover { border-color: var(--primary); background: rgba(21,101,192,0.05); transform: translateY(-2px); box-shadow: var(--shadow-sm); }
        .sports-tag .count {
            background: var(--bg);
            padding: 2px 10px;
            border-radius: 20px;
            font-size: 0.8rem;
            color: var(--text-light);
            font-weight: 600;
        }

        /* ========== 使用流程 ========== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            counter-reset: step;
        }
        .step-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: var(--transition);
            position: relative;
        }
        .step-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
        .step-card .step-num {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 1.2rem;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
        }
        .step-card h3 { font-size: 1.1rem; font-weight: 600; margin-bottom: 8px; }
        .step-card p { font-size: 0.9rem; color: var(--text-light); margin: 0; }

        /* ========== 适用场景 ========== */
        .scenes-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .scene-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: var(--transition);
            display: flex;
            flex-direction: row;
            align-items: stretch;
        }
        .scene-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
        .scene-card .scene-img {
            width: 160px;
            min-height: 160px;
            flex-shrink: 0;
            background: var(--bg-dark);
            overflow: hidden;
        }
        .scene-card .scene-img img { width: 100%; height: 100%; object-fit: cover; transition: var(--transition); }
        .scene-card:hover .scene-img img { transform: scale(1.05); }
        .scene-card .scene-body { padding: 20px 24px; flex: 1; display: flex; flex-direction: column; justify-content: center; }
        .scene-card .scene-body h3 { font-size: 1.1rem; font-weight: 600; margin-bottom: 6px; }
        .scene-card .scene-body p { font-size: 0.9rem; color: var(--text-light); margin: 0; }
        .scene-card .scene-body .tag-group { margin-top: 10px; }

        .tag-group { display: flex; flex-wrap: wrap; gap: 6px; }
        .tag {
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 500;
            background: var(--bg);
            color: var(--text-light);
            border: 1px solid var(--border);
        }

        /* ========== FAQ ========== */
        .faq-list { max-width: 800px; margin: 0 auto; }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--primary-light); }
        .faq-item .faq-q {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: var(--bg-card);
            transition: var(--transition);
            user-select: none;
        }
        .faq-item .faq-q:hover { background: rgba(21,101,192,0.03); }
        .faq-item .faq-q i { color: var(--primary); font-size: 0.9em; transition: var(--transition); }
        .faq-item.active .faq-q i { transform: rotate(180deg); }
        .faq-item .faq-a {
            padding: 0 24px 18px;
            font-size: 0.95rem;
            color: var(--text-light);
            line-height: 1.8;
            display: none;
        }
        .faq-item.active .faq-a { display: block; }

        /* ========== CTA ========== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
            padding: 80px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            opacity: 0.1;
            z-index: 0;
        }
        .cta-section .container { position: relative; z-index: 1; }
        .cta-section h2 { font-size: 2.2rem; font-weight: 700; color: #fff; margin-bottom: 16px; }
        .cta-section p { font-size: 1.1rem; color: rgba(255,255,255,0.85); max-width: 600px; margin: 0 auto 32px; }
        .cta-section .btn-cta {
            padding: 18px 48px;
            border-radius: var(--radius-xl);
            font-size: 1.1rem;
            font-weight: 700;
            background: var(--accent);
            color: #fff;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 12px;
            box-shadow: 0 8px 24px rgba(255,143,0,0.4);
        }
        .cta-section .btn-cta:hover { background: var(--accent-dark); transform: translateY(-3px); box-shadow: 0 12px 36px rgba(255,143,0,0.5); }

        /* ========== 页脚 ========== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.75);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .site-footer .site-logo { color: var(--text-white); font-size: 1.3rem; margin-bottom: 12px; }
        .site-footer .site-logo i { color: var(--accent); }
        .site-footer .footer-brand p { font-size: 0.9rem; color: rgba(255,255,255,0.6); margin: 12px 0 0; line-height: 1.7; }
        .footer-col h4 { font-size: 1rem; font-weight: 600; color: var(--text-white); margin-bottom: 16px; }
        .footer-col ul li { margin-bottom: 8px; }
        .footer-col ul li a { color: rgba(255,255,255,0.6); font-size: 0.9rem; display: inline-flex; align-items: center; gap: 8px; transition: var(--transition); }
        .footer-col ul li a:hover { color: var(--accent); padding-left: 4px; }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.45);
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom a { color: rgba(255,255,255,0.5); }
        .footer-bottom a:hover { color: var(--accent); }
        .footer-bottom span:last-child a { margin: 0 6px; }

        /* ========== 响应式 ========== */
        @media (max-width: 1024px) {
            .features-grid { grid-template-columns: repeat(2, 1fr); }
            .steps-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: repeat(2, 1fr); gap: 32px; }
            .hero-content h1 { font-size: 2.6rem; }
        }
        @media (max-width: 768px) {
            :root { --header-h: 64px; }
            .section-pad { padding: 56px 0; }
            h1 { font-size: 2rem; }
            h2 { font-size: 1.6rem; }
            .hero-content h1 { font-size: 2rem; }
            .hero-content .hero-sub { font-size: 1rem; }
            .hero-section { min-height: 60vh; padding: 100px 0 80px; }
            .hero-stats { gap: 24px; }
            .hero-stats .stat-num { font-size: 1.6rem; }

            .site-header .container { gap: 8px; }
            .site-logo { font-size: 1.1rem; }
            .nav-tabs a { padding: 6px 14px; font-size: 0.82rem; }
            .nav-cta .btn-primary { padding: 8px 16px; font-size: 0.82rem; }
            .nav-cta { margin-left: 6px; }

            .features-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
            .feature-card { padding: 24px 16px; }
            .feature-card .icon-wrap { width: 52px; height: 52px; font-size: 1.3rem; }

            .steps-grid { grid-template-columns: 1fr 1fr; gap: 16px; }

            .scenes-grid { grid-template-columns: 1fr; gap: 20px; }
            .scene-card { flex-direction: column; }
            .scene-card .scene-img { width: 100%; height: 180px; }

            .footer-grid { grid-template-columns: 1fr; gap: 28px; text-align: center; }
            .footer-brand .tag-group { justify-content: center; }
            .footer-bottom { flex-direction: column; text-align: center; }

            .cta-section h2 { font-size: 1.6rem; }
            .cta-section .btn-cta { padding: 14px 32px; font-size: 1rem; }

            .section-title { margin-bottom: 32px; }
            .section-title h2 { font-size: 1.5rem; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .hero-content h1 { font-size: 1.7rem; }
            .features-grid { grid-template-columns: 1fr; }
            .steps-grid { grid-template-columns: 1fr; }
            .hero-actions { flex-direction: column; align-items: center; }
            .hero-actions .btn-hero { width: 100%; max-width: 300px; justify-content: center; }
            .site-logo { font-size: 0.95rem; }
            .site-logo i { font-size: 1.1em; }
            .nav-tabs { gap: 4px; padding: 3px; }
            .nav-tabs a { padding: 5px 10px; font-size: 0.75rem; gap: 4px; }
            .nav-tabs a i { font-size: 0.8em; }
            .nav-cta .btn-primary { padding: 6px 12px; font-size: 0.75rem; gap: 4px; }
            .hero-stats { flex-direction: column; gap: 16px; }
        }

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