/* roulang page: index */
:root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #dbeafe;
            --secondary: #0f172a;
            --accent: #f59e0b;
            --accent-light: #fef3c7;
            --bg: #ffffff;
            --bg-alt: #f8fafc;
            --bg-dark: #0f172a;
            --text: #1e293b;
            --text-light: #64748b;
            --text-white: #f1f5f9;
            --border: #e2e8f0;
            --radius: 12px;
            --radius-sm: 8px;
            --shadow: 0 4px 24px rgba(0,0,0,0.06);
            --shadow-lg: 0 12px 48px rgba(0,0,0,0.10);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --spacing-section: 5rem;
            --container-max: 1200px;
        }
        * { 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;
            -webkit-font-smoothing: antialiased;
        }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--primary-dark); }
        img { max-width: 100%; height: auto; display: block; }
        .container { max-width: var(--container-max); margin: 0 auto; padding: 0 1.5rem; }
        .section { padding: var(--spacing-section) 0; }
        .section-alt { background: var(--bg-alt); }
        .section-dark { background: var(--bg-dark); color: var(--text-white); }
        .section-title {
            font-size: 2.25rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            line-height: 1.3;
            margin-bottom: 0.75rem;
        }
        .section-subtitle {
            font-size: 1.125rem;
            color: var(--text-light);
            max-width: 640px;
            margin: 0 auto 3rem auto;
            text-align: center;
        }
        .section-dark .section-subtitle { color: #94a3b8; }
        .text-center { text-align: center; }
        .mb-1 { margin-bottom: 0.5rem; }
        .mb-2 { margin-bottom: 1rem; }
        .mb-3 { margin-bottom: 1.5rem; }
        .mb-4 { margin-bottom: 2rem; }

        /* Header & Nav */
        .header {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: rgba(255,255,255,0.97);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 1px 4px rgba(0,0,0,0.04);
        }
        .navbar {
            padding: 0.75rem 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        .navbar-brand {
            font-size: 1.375rem;
            font-weight: 700;
            color: var(--secondary);
            letter-spacing: -0.01em;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .navbar-brand i { color: var(--primary); font-size: 1.5rem; }
        .navbar-brand:hover { color: var(--primary); }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 0.25rem;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-link {
            padding: 0.5rem 1rem;
            font-size: 0.9375rem;
            font-weight: 500;
            color: var(--text);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
        }
        .nav-link:hover { color: var(--primary); background: var(--primary-light); }
        .nav-link.active { color: var(--primary); background: var(--primary-light); font-weight: 600; }
        .nav-cta {
            padding: 0.5rem 1.25rem;
            background: var(--primary);
            color: #fff !important;
            border-radius: var(--radius-sm);
            font-weight: 600;
        }
        .nav-cta:hover { background: var(--primary-dark); color: #fff !important; transform: translateY(-1px); box-shadow: 0 4px 12px rgba(37,99,235,0.3); }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text);
            cursor: pointer;
            padding: 0.25rem;
        }

        /* Hero */
        .hero {
            position: relative;
            min-height: 88vh;
            display: flex;
            align-items: center;
            background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 50%, #0f172a 100%);
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.2;
            mix-blend-mode: overlay;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(37,99,235,0.15) 0%, transparent 70%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            width: 100%;
            padding: 4rem 0;
        }
        .hero h1 {
            font-size: 3.5rem;
            font-weight: 800;
            letter-spacing: -0.03em;
            line-height: 1.15;
            color: #fff;
            margin-bottom: 1.25rem;
            text-shadow: 0 2px 20px rgba(0,0,0,0.3);
        }
        .hero p {
            font-size: 1.2rem;
            color: #cbd5e1;
            max-width: 600px;
            margin-bottom: 2rem;
            line-height: 1.7;
        }
        .hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 2rem;
            font-size: 1rem;
            font-weight: 600;
            border: none;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
        }
        .btn-primary { background: var(--primary); color: #fff; }
        .btn-primary:hover { background: var(--primary-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(37,99,235,0.35); }
        .btn-outline-light { background: transparent; color: #fff; border: 2px solid rgba(255,255,255,0.3); }
        .btn-outline-light:hover { background: rgba(255,255,255,0.1); border-color: #fff; color: #fff; transform: translateY(-2px); }
        .btn-accent { background: var(--accent); color: #0f172a; }
        .btn-accent:hover { background: #eab308; color: #0f172a; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(245,158,11,0.35); }
        .btn-lg { padding: 1rem 2.5rem; font-size: 1.125rem; border-radius: var(--radius); }
        .hero-stats {
            display: flex;
            gap: 2.5rem;
            margin-top: 2.5rem;
            padding-top: 2rem;
            border-top: 1px solid rgba(255,255,255,0.12);
        }
        .hero-stat { text-align: center; }
        .hero-stat-num { font-size: 2rem; font-weight: 700; color: #fff; display: block; line-height: 1.2; }
        .hero-stat-label { font-size: 0.875rem; color: #94a3b8; }

        /* Card Grid */
        .card-grid {
            display: grid;
            gap: 1.5rem;
        }
        .card-grid-3 { grid-template-columns: repeat(3, 1fr); }
        .card-grid-4 { grid-template-columns: repeat(4, 1fr); }
        .card-grid-2 { grid-template-columns: repeat(2, 1fr); }
        .card {
            background: var(--bg);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: all var(--transition);
            border: 1px solid var(--border);
        }
        .card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
        .card-img { width: 100%; aspect-ratio: 16/10; object-fit: cover; }
        .card-body { padding: 1.5rem; }
        .card-title { font-size: 1.125rem; font-weight: 700; margin-bottom: 0.5rem; line-height: 1.4; }
        .card-text { font-size: 0.9375rem; color: var(--text-light); line-height: 1.65; }
        .card-meta { font-size: 0.8125rem; color: var(--text-light); display: flex; gap: 1rem; margin-bottom: 0.75rem; }
        .card-meta i { margin-right: 0.25rem; }
        .badge {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 0.25rem 0.75rem;
            border-radius: 20px;
            background: var(--primary-light);
            color: var(--primary);
        }
        .badge-accent { background: var(--accent-light); color: #92400e; }
        .badge-dark { background: #1e293b; color: #f1f5f9; }

        /* Features */
        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--primary);
            background: var(--primary-light);
            margin-bottom: 1rem;
        }
        .feature-icon.accent { background: var(--accent-light); color: #92400e; }
        .feature-icon.dark { background: #1e293b; color: #f1f5f9; }

        /* Process */
        .process-step {
            display: flex;
            gap: 1.5rem;
            align-items: flex-start;
            margin-bottom: 2rem;
        }
        .process-num {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.125rem;
        }
        .process-content h4 { font-size: 1.125rem; font-weight: 700; margin-bottom: 0.25rem; }
        .process-content p { color: var(--text-light); font-size: 0.9375rem; }

        /* FAQ */
        .faq-item {
            border-bottom: 1px solid var(--border);
            padding: 1.25rem 0;
        }
        .faq-question {
            font-size: 1.0625rem;
            font-weight: 600;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            padding: 0.5rem 0;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            color: var(--text);
            transition: color var(--transition);
        }
        .faq-question:hover { color: var(--primary); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0;
            color: var(--text-light);
            font-size: 0.9375rem;
            line-height: 1.7;
        }
        .faq-item.active .faq-answer { max-height: 300px; padding: 0.75rem 0 1rem 0; }
        .faq-item.active .faq-question i { transform: rotate(180deg); }
        .faq-question i { transition: transform 0.3s ease; font-size: 0.875rem; }

        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, #1e40af 0%, #2563eb 50%, #1e40af 100%);
            padding: 4rem 0;
            text-align: center;
            color: #fff;
            border-radius: var(--radius);
            margin: 0 1.5rem;
        }
        .cta-section h2 { font-size: 2.25rem; font-weight: 700; margin-bottom: 1rem; }
        .cta-section p { color: #bfdbfe; max-width: 600px; margin: 0 auto 2rem auto; font-size: 1.0625rem; }

        /* Footer */
        .footer {
            background: var(--bg-dark);
            color: #94a3b8;
            padding: 3rem 0 1.5rem 0;
        }
        .footer a { color: #94a3b8; }
        .footer a:hover { color: #fff; }
        .footer-brand { font-size: 1.25rem; font-weight: 700; color: #fff; margin-bottom: 0.75rem; }
        .footer-links { display: flex; flex-wrap: wrap; gap: 1.5rem; justify-content: center; margin-bottom: 1.5rem; }
        .footer-links a { font-size: 0.875rem; }
        .footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); padding-top: 1.5rem; margin-top: 1.5rem; text-align: center; font-size: 0.8125rem; }

        /* CMS List */
        .post-list { display: grid; gap: 1.5rem; }
        .post-item {
            display: flex;
            gap: 1.25rem;
            background: var(--bg);
            border-radius: var(--radius);
            padding: 1.25rem;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: all var(--transition);
            align-items: flex-start;
        }
        .post-item:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
        .post-thumb {
            flex-shrink: 0;
            width: 120px;
            height: 80px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            background: var(--bg-alt);
        }
        .post-thumb img { width: 100%; height: 100%; object-fit: cover; }
        .post-info { flex: 1; min-width: 0; }
        .post-title { font-weight: 700; font-size: 1.0625rem; margin-bottom: 0.25rem; }
        .post-title a { color: var(--text); }
        .post-title a:hover { color: var(--primary); }
        .post-excerpt { font-size: 0.875rem; color: var(--text-light); margin-bottom: 0.5rem; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .post-meta { font-size: 0.75rem; color: var(--text-light); display: flex; gap: 1rem; }

        /* Testimonial / Trust */
        .trust-item {
            text-align: center;
            padding: 2rem 1.5rem;
            background: var(--bg);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .trust-item:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
        .trust-icon { font-size: 2.5rem; color: var(--primary); margin-bottom: 1rem; }
        .trust-num { font-size: 2rem; font-weight: 700; color: var(--secondary); display: block; }
        .trust-label { font-size: 0.875rem; color: var(--text-light); }

        /* Responsive */
        @media (max-width: 1024px) {
            .card-grid-4 { grid-template-columns: repeat(2, 1fr); }
            .hero h1 { font-size: 2.75rem; }
        }
        @media (max-width: 768px) {
            :root { --spacing-section: 3rem; }
            .nav-toggle { display: block; }
            .nav-menu {
                display: none;
                width: 100%;
                flex-direction: column;
                padding: 1rem 0;
                gap: 0.25rem;
            }
            .nav-menu.open { display: flex; }
            .nav-link { width: 100%; padding: 0.625rem 0.75rem; }
            .hero { min-height: 70vh; }
            .hero h1 { font-size: 2.25rem; }
            .hero p { font-size: 1rem; }
            .hero-stats { flex-wrap: wrap; gap: 1.5rem; }
            .card-grid-3, .card-grid-2 { grid-template-columns: 1fr; }
            .section-title { font-size: 1.75rem; }
            .cta-section { margin: 0 1rem; padding: 2.5rem 1rem; }
            .cta-section h2 { font-size: 1.75rem; }
            .post-item { flex-direction: column; }
            .post-thumb { width: 100%; height: 160px; }
            .process-step { flex-direction: column; gap: 0.75rem; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 1rem; }
            .hero h1 { font-size: 1.75rem; }
            .hero-actions { flex-direction: column; }
            .btn { width: 100%; justify-content: center; }
            .hero-stats { flex-direction: column; gap: 1rem; }
            .hero-stat { text-align: left; display: flex; gap: 1rem; align-items: baseline; }
            .card-grid-4 { grid-template-columns: 1fr; }
            .footer-links { flex-direction: column; align-items: center; gap: 0.75rem; }
        }

        /* Accessibility */
        .btn:focus-visible, .nav-link:focus-visible, .faq-question:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        /* Smooth card entrance */
        @media (prefers-reduced-motion: no-preference) {
            .card, .post-item, .trust-item { opacity: 0; animation: fadeUp 0.6s ease forwards; }
            .card:nth-child(1) { animation-delay: 0.05s; }
            .card:nth-child(2) { animation-delay: 0.1s; }
            .card:nth-child(3) { animation-delay: 0.15s; }
            .card:nth-child(4) { animation-delay: 0.2s; }
            .card:nth-child(5) { animation-delay: 0.25s; }
            .card:nth-child(6) { animation-delay: 0.3s; }
            .post-item:nth-child(1) { animation-delay: 0.05s; }
            .post-item:nth-child(2) { animation-delay: 0.1s; }
            .post-item:nth-child(3) { animation-delay: 0.15s; }
            .post-item:nth-child(4) { animation-delay: 0.2s; }
            .post-item:nth-child(5) { animation-delay: 0.25s; }
            .trust-item:nth-child(1) { animation-delay: 0.05s; }
            .trust-item:nth-child(2) { animation-delay: 0.1s; }
            .trust-item:nth-child(3) { animation-delay: 0.15s; }
            .trust-item:nth-child(4) { animation-delay: 0.2s; }
            @keyframes fadeUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0f172a;
            --primary-light: #1e293b;
            --primary-dark: #0b1120;
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --accent-dark: #d97706;
            --secondary: #3b82f6;
            --secondary-light: #60a5fa;
            --success: #10b981;
            --bg-body: #ffffff;
            --bg-alt: #f8fafc;
            --bg-card: #ffffff;
            --bg-dark: #0f172a;
            --text-primary: #0f172a;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
            --text-inverse: #ffffff;
            --text-accent: #f59e0b;
            --border-color: #e2e8f0;
            --border-light: #f1f5f9;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --container-max: 1200px;
        }

        /* ===== 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-sans);
            color: var(--text-primary);
            background: var(--bg-body);
            line-height: 1.7;
            font-size: 1rem;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--secondary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--secondary-light); text-decoration: none; }
        a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
        button { cursor: pointer; font-family: inherit; border: none; background: none; }
        button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
        input, textarea { font-family: inherit; }
        ul, ol { list-style: none; padding: 0; margin: 0; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.25; font-weight: 700; color: var(--text-primary); }
        p { margin-bottom: 0; color: var(--text-secondary); }

        /* ===== Container ===== */
        .container { max-width: var(--container-max); padding-left: 1.25rem; padding-right: 1.25rem; margin-left: auto; margin-right: auto; width: 100%; }

        /* ===== Header / Nav ===== */
        .header {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: rgba(15, 23, 42, 0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255,255,255,0.06);
            transition: background var(--transition);
        }
        .header .container { display: flex; align-items: center; justify-content: space-between; height: 68px; }
        .navbar { display: flex; align-items: center; justify-content: space-between; width: 100%; gap: 1.5rem; }
        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--text-inverse);
            letter-spacing: -0.3px;
            transition: opacity var(--transition);
        }
        .navbar-brand i { color: var(--accent); font-size: 1.35rem; }
        .navbar-brand:hover { color: var(--accent-light); opacity: 0.92; }
        .nav-menu { display: flex; align-items: center; gap: 0.25rem; }
        .nav-menu li { margin: 0; }
        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.5rem 1rem;
            font-size: 0.9rem;
            font-weight: 500;
            color: rgba(255,255,255,0.75);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            white-space: nowrap;
        }
        .nav-link:hover { color: var(--text-inverse); background: rgba(255,255,255,0.08); }
        .nav-link.active, .nav-link[aria-current="page"] { color: var(--accent); background: rgba(245,158,11,0.12); }
        .nav-link.nav-cta {
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 700;
            padding: 0.5rem 1.25rem;
            border-radius: var(--radius-sm);
            box-shadow: 0 2px 8px rgba(245,158,11,0.3);
        }
        .nav-link.nav-cta:hover { background: var(--accent-light); transform: translateY(-1px); box-shadow: 0 4px 16px rgba(245,158,11,0.4); color: var(--primary-dark); }
        .nav-toggle { display: none; color: var(--text-inverse); font-size: 1.5rem; padding: 0.4rem; border-radius: var(--radius-sm); transition: background var(--transition); }
        .nav-toggle:hover { background: rgba(255,255,255,0.08); }

        /* ===== Article Banner ===== */
        .article-banner {
            position: relative;
            padding: 5rem 0 3.5rem;
            background: var(--bg-dark);
            overflow: hidden;
        }
        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            opacity: 0.18;
            z-index: 0;
        }
        .article-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,23,42,0.92) 0%, rgba(15,23,42,0.7) 100%);
            z-index: 1;
        }
        .article-banner .container { position: relative; z-index: 2; }
        .article-breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 0.5rem;
            margin-bottom: 1.5rem;
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .article-breadcrumb a { color: var(--text-muted); transition: color var(--transition); }
        .article-breadcrumb a:hover { color: var(--accent); }
        .article-breadcrumb .separator { color: var(--text-muted); font-size: 0.7rem; }
        .article-breadcrumb .current { color: var(--accent-light); font-weight: 500; }
        .article-banner h1 {
            font-size: 2.25rem;
            font-weight: 800;
            color: var(--text-inverse);
            max-width: 860px;
            line-height: 1.3;
            letter-spacing: -0.5px;
            margin-bottom: 1rem;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 1.25rem;
            color: rgba(255,255,255,0.6);
            font-size: 0.9rem;
        }
        .article-meta i { margin-right: 0.3rem; }
        .article-meta .badge-cat {
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
            background: rgba(245,158,11,0.15);
            color: var(--accent-light);
            padding: 0.25rem 0.85rem;
            border-radius: 999px;
            font-size: 0.8rem;
            font-weight: 600;
        }
        .article-meta .badge-cat i { font-size: 0.7rem; }

        /* ===== Article Content ===== */
        .article-section {
            padding: 4rem 0 5rem;
            background: var(--bg-body);
        }
        .article-wrapper {
            max-width: 840px;
            margin: 0 auto;
        }
        .article-body {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--text-primary);
        }
        .article-body p {
            margin-bottom: 1.5rem;
            color: var(--text-secondary);
        }
        .article-body h2 {
            font-size: 1.5rem;
            font-weight: 700;
            margin-top: 2.5rem;
            margin-bottom: 1rem;
            color: var(--text-primary);
        }
        .article-body h3 {
            font-size: 1.2rem;
            font-weight: 600;
            margin-top: 2rem;
            margin-bottom: 0.75rem;
            color: var(--text-primary);
        }
        .article-body ul, .article-body ol {
            margin-bottom: 1.5rem;
            padding-left: 1.75rem;
            color: var(--text-secondary);
        }
        .article-body ul li { list-style: disc; margin-bottom: 0.4rem; }
        .article-body ol li { list-style: decimal; margin-bottom: 0.4rem; }
        .article-body blockquote {
            border-left: 4px solid var(--accent);
            padding: 1rem 1.5rem;
            margin: 1.5rem 0;
            background: var(--bg-alt);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-body img {
            border-radius: var(--radius-md);
            margin: 1.5rem 0;
            box-shadow: var(--shadow-md);
        }
        .article-body a { color: var(--secondary); font-weight: 500; text-decoration: underline; text-underline-offset: 2px; }
        .article-body a:hover { color: var(--accent); }
        .article-body code {
            background: var(--bg-alt);
            padding: 0.2rem 0.5rem;
            border-radius: 4px;
            font-size: 0.9em;
            border: 1px solid var(--border-color);
        }
        .article-body pre {
            background: var(--bg-dark);
            color: #e2e8f0;
            padding: 1.25rem 1.5rem;
            border-radius: var(--radius-md);
            overflow-x: auto;
            font-size: 0.9rem;
            line-height: 1.6;
            margin: 1.5rem 0;
        }
        .article-body pre code { background: none; padding: 0; border: none; color: inherit; font-size: inherit; }
        .article-divider {
            width: 100%;
            height: 1px;
            background: var(--border-color);
            margin: 3rem 0 2rem;
        }
        .article-footer-meta {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 1rem;
            padding-top: 1.5rem;
            border-top: 1px solid var(--border-color);
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        .article-footer-meta .tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .article-footer-meta .tag {
            display: inline-block;
            background: var(--bg-alt);
            padding: 0.2rem 0.8rem;
            border-radius: 999px;
            font-size: 0.8rem;
            color: var(--text-secondary);
            border: 1px solid var(--border-color);
            transition: all var(--transition);
        }
        .article-footer-meta .tag:hover { background: var(--accent); color: var(--primary-dark); border-color: var(--accent); }

        /* ===== Not Found ===== */
        .not-found-box {
            text-align: center;
            padding: 4rem 2rem;
            background: var(--bg-alt);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
        }
        .not-found-box i { font-size: 3rem; color: var(--text-muted); margin-bottom: 1rem; }
        .not-found-box h3 { font-size: 1.5rem; margin-bottom: 0.75rem; }
        .not-found-box p { color: var(--text-secondary); margin-bottom: 1.5rem; }
        .not-found-box .btn-home {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 700;
            padding: 0.75rem 2rem;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
        }
        .not-found-box .btn-home:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: var(--shadow-md); }

        /* ===== Related / CTA ===== */
        .related-section {
            padding: 3rem 0 4rem;
            background: var(--bg-alt);
        }
        .related-section h2 {
            font-size: 1.5rem;
            font-weight: 700;
            text-align: center;
            margin-bottom: 2rem;
            color: var(--text-primary);
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 1.5rem;
        }
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 1.5rem;
            border: 1px solid var(--border-color);
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--accent); }
        .related-card h4 { font-size: 1rem; font-weight: 600; margin-bottom: 0.5rem; }
        .related-card h4 a { color: var(--text-primary); }
        .related-card h4 a:hover { color: var(--accent); }
        .related-card p { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 0.75rem; }
        .related-card .meta { font-size: 0.8rem; color: var(--text-muted); }
        .related-card .meta i { margin-right: 0.3rem; }

        .cta-section {
            padding: 3.5rem 0;
            background: var(--bg-dark);
            position: relative;
            overflow: hidden;
        }
        .cta-section::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;
        }
        .cta-section .container { position: relative; z-index: 1; text-align: center; }
        .cta-section h2 { font-size: 2rem; font-weight: 800; color: var(--text-inverse); margin-bottom: 1rem; }
        .cta-section p { color: rgba(255,255,255,0.7); max-width: 560px; margin: 0 auto 1.75rem; font-size: 1.05rem; }
        .cta-section .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 700;
            padding: 0.85rem 2.5rem;
            border-radius: var(--radius-sm);
            font-size: 1rem;
            transition: all var(--transition);
            box-shadow: 0 4px 20px rgba(245,158,11,0.3);
        }
        .cta-section .btn-cta:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: 0 8px 30px rgba(245,158,11,0.4); }

        /* ===== Footer ===== */
        .footer {
            background: #0b1120;
            padding: 3rem 0 1.5rem;
            border-top: 1px solid rgba(255,255,255,0.05);
        }
        .footer .text-center { text-align: center; }
        .footer-brand {
            font-size: 1.2rem;
            font-weight: 800;
            color: var(--text-inverse);
            margin-bottom: 0.75rem;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
        }
        .footer-brand i { color: var(--accent); }
        .footer-links {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 0.25rem 1.5rem;
            margin-bottom: 1.5rem;
        }
        .footer-links a {
            color: rgba(255,255,255,0.6);
            font-size: 0.9rem;
            transition: color var(--transition);
        }
        .footer-links a:hover { color: var(--accent); }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.06);
            padding-top: 1.25rem;
            text-align: center;
        }
        .footer-bottom p {
            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: 992px) {
            .article-banner h1 { font-size: 1.8rem; }
            .cta-section h2 { font-size: 1.6rem; }
        }
        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                position: absolute;
                top: 68px;
                left: 0;
                right: 0;
                background: rgba(15,23,42,0.98);
                backdrop-filter: blur(12px);
                flex-direction: column;
                padding: 1rem 1.25rem;
                gap: 0.25rem;
                border-bottom: 1px solid rgba(255,255,255,0.06);
                box-shadow: var(--shadow-lg);
            }
            .nav-menu.open { display: flex; }
            .nav-toggle { display: block; }
            .nav-link { width: 100%; padding: 0.7rem 1rem; }
            .article-banner { padding: 3.5rem 0 2.5rem; }
            .article-banner h1 { font-size: 1.5rem; }
            .article-meta { gap: 0.75rem; font-size: 0.8rem; }
            .article-body { font-size: 1rem; }
            .article-section { padding: 2.5rem 0 3rem; }
            .related-grid { grid-template-columns: 1fr; }
            .cta-section h2 { font-size: 1.35rem; }
            .cta-section .btn-cta { width: 100%; justify-content: center; }
        }
        @media (max-width: 480px) {
            .header .container { height: 60px; }
            .navbar-brand { font-size: 1.05rem; }
            .article-banner h1 { font-size: 1.25rem; }
            .article-wrapper { padding: 0 0.25rem; }
            .article-footer-meta { flex-direction: column; align-items: flex-start; }
            .footer-links { gap: 0.25rem 1rem; }
            .footer-links a { font-size: 0.8rem; }
        }

        /* ===== Bootstrap overrides ===== */
        .btn:focus, .btn:active:focus { box-shadow: none; }
        .form-control:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(245,158,11,0.15); }
        .container, .container-fluid { padding-left: 1.25rem; padding-right: 1.25rem; }
        @media (min-width: 768px) { .container, .container-fluid { padding-left: 1.5rem; padding-right: 1.5rem; } }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0f172a;
            --primary-light: #1e293b;
            --accent: #f59e0b;
            --accent-hover: #d97706;
            --accent-soft: #fef3c7;
            --bg-body: #ffffff;
            --bg-alt: #f8fafc;
            --bg-dark: #0b1120;
            --text-primary: #0f172a;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
            --text-light: #f1f5f9;
            --border-color: #e2e8f0;
            --border-light: #f1f5f9;
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
            --shadow-accent: 0 4px 24px rgba(245, 158, 11, 0.35);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --container-max: 1200px;
            --header-height: 72px;
        }

        /* ===== 基础重置 ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

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

        body {
            font-family: var(--font-sans);
            color: var(--text-primary);
            background: var(--bg-body);
            line-height: 1.6;
            font-size: 16px;
        }

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

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

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

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

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.25;
            font-weight: 700;
            color: var(--text-primary);
        }

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

        /* ===== 导航 ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color);
            height: var(--header-height);
            transition: box-shadow var(--transition);
        }

        .header.scrolled {
            box-shadow: var(--shadow-md);
        }

        .navbar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
            padding: 0;
        }

        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--primary) !important;
            letter-spacing: -0.5px;
            text-decoration: none;
        }
        .navbar-brand i {
            color: var(--accent);
            font-size: 1.5rem;
        }
        .navbar-brand:hover {
            color: var(--primary) !important;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 8px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            text-decoration: none;
            position: relative;
        }
        .nav-link:hover {
            color: var(--primary);
            background: var(--bg-alt);
        }
        .nav-link.active {
            color: var(--accent);
            background: var(--accent-soft);
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--accent);
            border-radius: 4px;
        }
        .nav-link:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        .nav-cta {
            background: var(--accent);
            color: var(--primary) !important;
            font-weight: 700;
            padding: 8px 22px;
            border-radius: var(--radius-sm);
            box-shadow: var(--shadow-accent);
        }
        .nav-cta:hover {
            background: var(--accent-hover);
            color: var(--primary) !important;
            transform: translateY(-1px);
            box-shadow: 0 6px 28px rgba(245, 158, 11, 0.4);
        }
        .nav-cta.active {
            background: var(--accent);
            color: var(--primary) !important;
        }
        .nav-cta.active::after {
            display: none;
        }

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text-primary);
            cursor: pointer;
            padding: 4px 8px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }
        .nav-toggle:hover {
            background: var(--bg-alt);
        }
        .nav-toggle:focus-visible {
            outline: 2px solid var(--accent);
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 32px;
            font-size: 0.95rem;
            font-weight: 600;
            border-radius: var(--radius-sm);
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
            line-height: 1.4;
        }
        .btn:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        .btn-primary {
            background: var(--accent);
            color: var(--primary);
            box-shadow: var(--shadow-accent);
        }
        .btn-primary:hover {
            background: var(--accent-hover);
            color: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(245, 158, 11, 0.4);
        }
        .btn-primary:active {
            transform: translateY(0);
        }

        .btn-outline {
            background: transparent;
            color: var(--text-primary);
            border: 2px solid var(--border-color);
        }
        .btn-outline:hover {
            border-color: var(--accent);
            color: var(--accent);
            transform: translateY(-2px);
        }
        .btn-outline:active {
            transform: translateY(0);
        }

        .btn-light {
            background: rgba(255, 255, 255, 0.95);
            color: var(--primary);
        }
        .btn-light:hover {
            background: #ffffff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        .btn-lg {
            padding: 16px 42px;
            font-size: 1.05rem;
            border-radius: var(--radius-md);
        }

        .btn-sm {
            padding: 8px 18px;
            font-size: 0.85rem;
        }

        /* ===== 徽章 / 标签 ===== */
        .badge-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 14px;
            font-size: 0.8rem;
            font-weight: 600;
            border-radius: 100px;
            background: var(--accent-soft);
            color: var(--accent-hover);
            transition: all var(--transition);
        }
        .badge-tag i {
            font-size: 0.75rem;
        }

        .badge-pill {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            font-size: 0.8rem;
            font-weight: 600;
            border-radius: 100px;
            background: var(--bg-alt);
            color: var(--text-secondary);
            border: 1px solid var(--border-color);
        }

        .badge-accent {
            background: var(--accent);
            color: var(--primary);
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            min-height: 85vh;
            display: flex;
            align-items: center;
            padding: calc(var(--header-height) + 40px) 0 80px;
            background: var(--bg-dark);
            overflow: hidden;
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            opacity: 0.35;
            transform: scale(1.05);
            transition: transform 0.6s ease;
        }
        .hero-section:hover .hero-bg {
            transform: scale(1);
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 17, 32, 0.92) 0%, rgba(11, 17, 32, 0.7) 50%, rgba(11, 17, 32, 0.88) 100%);
        }

        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 820px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 20px;
            border-radius: 100px;
            background: rgba(245, 158, 11, 0.15);
            border: 1px solid rgba(245, 158, 11, 0.3);
            color: var(--accent);
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 24px;
            backdrop-filter: blur(4px);
        }
        .hero-badge i {
            font-size: 0.9rem;
        }

        .hero-title {
            font-size: 3.2rem;
            font-weight: 800;
            color: #ffffff;
            line-height: 1.15;
            letter-spacing: -1px;
            margin-bottom: 20px;
        }
        .hero-title span {
            color: var(--accent);
            background: linear-gradient(135deg, var(--accent), #fbbf24);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-sub {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.7);
            max-width: 640px;
            margin: 0 auto 36px;
            line-height: 1.7;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
        }

        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 40px;
            margin-top: 56px;
            padding-top: 40px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }
        .hero-stat-item {
            text-align: center;
        }
        .hero-stat-item .num {
            font-size: 2.2rem;
            font-weight: 800;
            color: #ffffff;
            line-height: 1.2;
        }
        .hero-stat-item .num span {
            color: var(--accent);
        }
        .hero-stat-item .label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
            margin-top: 4px;
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-alt);
        }
        .section-dark {
            background: var(--bg-dark);
            color: #ffffff;
        }

        .section-header {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 56px;
        }
        .section-header .label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--accent);
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 12px;
        }
        .section-header h2 {
            font-size: 2.2rem;
            font-weight: 700;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .section-header p {
            font-size: 1.05rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .section-dark .section-header h2 {
            color: #ffffff;
        }
        .section-dark .section-header p {
            color: rgba(255, 255, 255, 0.65);
        }

        /* ===== 卡片 ===== */
        .card-custom {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition);
            height: 100%;
        }
        .card-custom:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }

        .card-custom .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
        }
        .card-custom .card-body {
            padding: 24px;
        }
        .card-custom .card-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 12px;
        }
        .card-custom .card-title {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-primary);
        }
        .card-custom .card-text {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 16px;
        }
        .card-custom .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        .card-custom .card-meta i {
            margin-right: 4px;
        }

        .card-dark {
            background: rgba(255, 255, 255, 0.05);
            border-color: rgba(255, 255, 255, 0.1);
        }
        .card-dark .card-title {
            color: #ffffff;
        }
        .card-dark .card-text {
            color: rgba(255, 255, 255, 0.65);
        }
        .card-dark:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: var(--accent);
        }

        .card-icon {
            width: 56px;
            height: 56px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            background: var(--accent-soft);
            color: var(--accent);
            font-size: 1.5rem;
            margin-bottom: 16px;
            transition: all var(--transition);
        }
        .card-custom:hover .card-icon {
            background: var(--accent);
            color: var(--primary);
            transform: scale(1.05);
        }

        /* ===== 特色板块 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        /* ===== 赛事类型 ===== */
        .race-types {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .race-type-card {
            text-align: center;
            padding: 40px 28px;
            border-radius: var(--radius-md);
            background: #ffffff;
            border: 1px solid var(--border-color);
            transition: all var(--transition);
            height: 100%;
        }
        .race-type-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .race-type-card .icon-wrap {
            width: 72px;
            height: 72px;
            margin: 0 auto 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: var(--accent-soft);
            color: var(--accent);
            font-size: 2rem;
            transition: all var(--transition);
        }
        .race-type-card:hover .icon-wrap {
            background: var(--accent);
            color: var(--primary);
            transform: scale(1.08);
        }
        .race-type-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .race-type-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ===== 流程 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            counter-reset: step;
        }
        .step-item {
            text-align: center;
            padding: 32px 20px;
            border-radius: var(--radius-md);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: all var(--transition);
            position: relative;
        }
        .step-item:hover {
            background: rgba(255, 255, 255, 0.07);
            border-color: rgba(245, 158, 11, 0.3);
        }
        .step-item .step-num {
            width: 48px;
            height: 48px;
            margin: 0 auto 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: var(--accent);
            color: var(--primary);
            font-size: 1.2rem;
            font-weight: 800;
            transition: all var(--transition);
        }
        .step-item:hover .step-num {
            transform: scale(1.1);
        }
        .step-item h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 8px;
        }
        .step-item p {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.6;
        }

        /* ===== 数据模块 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            text-align: center;
        }
        .stat-card {
            padding: 32px 20px;
            border-radius: var(--radius-md);
            background: #ffffff;
            border: 1px solid var(--border-color);
            transition: all var(--transition);
        }
        .stat-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }
        .stat-card .stat-icon {
            font-size: 2rem;
            color: var(--accent);
            margin-bottom: 12px;
        }
        .stat-card .stat-num {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }
        .stat-card .stat-num span {
            color: var(--accent);
        }
        .stat-card .stat-label {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-top: 6px;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: var(--accent);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            cursor: pointer;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            transition: background var(--transition);
            gap: 16px;
        }
        .faq-question:hover {
            background: var(--bg-alt);
        }
        .faq-question:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: -2px;
        }
        .faq-question i {
            color: var(--accent);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 24px 18px;
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, var(--bg-dark) 0%, #1a1f36 100%);
            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: 0.08;
        }
        .cta-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 700px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .cta-content h2 {
            font-size: 2.2rem;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 16px;
        }
        .cta-content p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.65);
            margin-bottom: 32px;
            line-height: 1.7;
        }
        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--primary);
            color: rgba(255, 255, 255, 0.7);
            padding: 48px 0 32px;
            font-size: 0.9rem;
        }
        .footer-brand {
            font-size: 1.3rem;
            font-weight: 800;
            color: #ffffff;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            margin-bottom: 12px;
        }
        .footer-brand i {
            color: var(--accent);
        }
        .footer-links {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 8px 24px;
            margin: 16px 0 24px;
        }
        .footer-links a {
            color: rgba(255, 255, 255, 0.6);
            text-decoration: none;
            transition: color var(--transition);
            font-size: 0.88rem;
            padding: 4px 0;
        }
        .footer-links a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            text-align: center;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .hero-title {
                font-size: 2.6rem;
            }
            .features-grid,
            .race-types {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-height: 64px;
            }

            .nav-menu {
                display: none;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 16px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--border-color);
                box-shadow: var(--shadow-lg);
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-toggle {
                display: block;
            }
            .nav-link {
                padding: 12px 16px;
                width: 100%;
                justify-content: flex-start;
            }
            .nav-link.active::after {
                display: none;
            }
            .nav-link.active {
                background: var(--accent-soft);
            }
            .nav-cta {
                margin-top: 8px;
                justify-content: center;
            }

            .hero-section {
                min-height: 70vh;
                padding: calc(var(--header-height) + 24px) 0 48px;
            }
            .hero-title {
                font-size: 2rem;
            }
            .hero-sub {
                font-size: 1rem;
            }
            .hero-stats {
                gap: 24px;
                margin-top: 36px;
                padding-top: 28px;
            }
            .hero-stat-item .num {
                font-size: 1.6rem;
            }

            .section {
                padding: 56px 0;
            }
            .section-header h2 {
                font-size: 1.7rem;
            }

            .features-grid,
            .race-types {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-card .stat-num {
                font-size: 1.8rem;
            }

            .cta-section {
                padding: 56px 0;
            }
            .cta-content h2 {
                font-size: 1.7rem;
            }

            .footer {
                padding: 32px 0 24px;
            }
            .footer-links {
                gap: 4px 16px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .hero-title {
                font-size: 1.6rem;
            }
            .hero-sub {
                font-size: 0.9rem;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .hero-stats {
                flex-direction: column;
                gap: 16px;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .section-header h2 {
                font-size: 1.4rem;
            }
            .cta-content h2 {
                font-size: 1.4rem;
            }
            .faq-question {
                font-size: 0.9rem;
                padding: 14px 16px;
            }
            .faq-answer {
                padding: 0 16px 14px;
                font-size: 0.85rem;
            }
            .race-type-card {
                padding: 28px 20px;
            }
            .step-item {
                padding: 24px 16px;
            }
            .btn-lg {
                padding: 14px 28px;
                font-size: 0.95rem;
            }
        }

        /* ===== 辅助 ===== */
        .gap-1 { gap: 8px; }
        .gap-2 { gap: 16px; }
        .gap-3 { gap: 24px; }
        .gap-4 { gap: 32px; }
        .mt-1 { margin-top: 8px; }
        .mt-2 { margin-top: 16px; }
        .mt-3 { margin-top: 24px; }
        .mt-4 { margin-top: 32px; }
        .mb-1 { margin-bottom: 8px; }
        .mb-2 { margin-bottom: 16px; }
        .mb-3 { margin-bottom: 24px; }
        .mb-4 { margin-bottom: 32px; }
        .text-center { text-align: center; }
        .d-flex { display: flex; }
        .flex-wrap { flex-wrap: wrap; }
        .align-center { align-items: center; }
        .justify-center { justify-content: center; }

        img.rounded-img {
            border-radius: var(--radius-sm);
            width: 100%;
            height: auto;
        }

        .backpic-divider {
            height: 1px;
            border: none;
            background: linear-gradient(90deg, transparent, var(--border-color), transparent);
            margin: 0;
        }