/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #0f1b2d;
            --primary-light: #1a2d4a;
            --primary-lighter: #243b5e;
            --secondary: #2563eb;
            --secondary-hover: #1d4ed8;
            --secondary-light: #dbeafe;
            --accent: #f59e0b;
            --accent-hover: #d97706;
            --accent-light: #fef3c7;
            --bg: #f8fafc;
            --surface: #ffffff;
            --surface-alt: #f1f5f9;
            --text: #1e293b;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --shadow-sm: 0 1px 2px rgba(15, 27, 45, 0.06);
            --shadow: 0 4px 12px rgba(15, 27, 45, 0.08);
            --shadow-lg: 0 12px 40px rgba(15, 27, 45, 0.12);
            --shadow-xl: 0 24px 60px rgba(15, 27, 45, 0.16);
            --radius-sm: 6px;
            --radius: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
            --container: 1200px;
            --nav-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
        }
        a { color: var(--secondary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--secondary-hover); }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea { font-family: inherit; font-size: inherit; outline: none; border: none; }
        button { cursor: pointer; background: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--primary); }
        h1 { font-size: 2.8rem; }
        h2 { font-size: 2rem; }
        h3 { font-size: 1.35rem; }
        h4 { font-size: 1.1rem; }

        /* ===== Container ===== */
        .container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }
        .container-narrow { max-width: 840px; }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex; align-items: center; justify-content: center; gap: 8px;
            padding: 12px 28px; font-weight: 600; font-size: 0.95rem;
            border-radius: var(--radius); transition: all var(--transition);
            border: 2px solid transparent; letter-spacing: 0.3px;
        }
        .btn-primary { background: var(--secondary); color: #fff; border-color: var(--secondary); }
        .btn-primary:hover { background: var(--secondary-hover); border-color: var(--secondary-hover); color: #fff; transform: translateY(-2px); box-shadow: var(--shadow); }
        .btn-primary:active { transform: translateY(0); }
        .btn-accent { background: var(--accent); color: #fff; border-color: var(--accent); }
        .btn-accent:hover { background: var(--accent-hover); border-color: var(--accent-hover); color: #fff; transform: translateY(-2px); box-shadow: var(--shadow); }
        .btn-outline { background: transparent; color: var(--secondary); border-color: var(--secondary); }
        .btn-outline:hover { background: var(--secondary); color: #fff; transform: translateY(-2px); box-shadow: var(--shadow); }
        .btn-outline-light { background: transparent; color: #fff; border-color: rgba(255,255,255,0.5); }
        .btn-outline-light:hover { background: rgba(255,255,255,0.12); border-color: #fff; color: #fff; }
        .btn-lg { padding: 16px 40px; font-size: 1.05rem; border-radius: var(--radius-lg); }
        .btn-sm { padding: 8px 18px; font-size: 0.85rem; border-radius: var(--radius-sm); }
        .btn i { font-size: 0.9em; }

        /* ===== Badge / Tag ===== */
        .badge {
            display: inline-block; padding: 4px 14px; font-size: 0.78rem; font-weight: 600;
            border-radius: 100px; background: var(--secondary-light); color: var(--secondary);
            letter-spacing: 0.3px;
        }
        .badge-accent { background: var(--accent-light); color: var(--accent-hover); }
        .badge-outline { background: transparent; border: 1px solid var(--border); color: var(--text-secondary); }

        /* ===== Card ===== */
        .card {
            background: var(--surface); border-radius: var(--radius); overflow: hidden;
            box-shadow: var(--shadow-sm); border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .card:hover { box-shadow: var(--shadow); transform: translateY(-4px); }
        .card-img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }
        .card-body { padding: 24px; }
        .card-title { font-size: 1.15rem; margin-bottom: 8px; color: var(--primary); }
        .card-text { font-size: 0.92rem; color: var(--text-secondary); line-height: 1.6; }
        .card-meta { display: flex; align-items: center; gap: 16px; font-size: 0.82rem; color: var(--text-muted); margin-top: 12px; }

        /* ===== Section ===== */
        .section { padding: 80px 0; }
        .section-alt { background: var(--surface-alt); }
        .section-dark { background: var(--primary); color: #fff; }
        .section-title { text-align: center; margin-bottom: 16px; }
        .section-sub { text-align: center; font-size: 1.1rem; color: var(--text-secondary); max-width: 680px; margin: 0 auto 48px; }
        .section-dark .section-sub { color: rgba(255,255,255,0.7); }
        .section-dark .section-title { color: #fff; }

        /* ===== Header / Nav (SaaS Command Bar Style) ===== */
        .site-header {
            position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
            height: var(--nav-height); background: rgba(255,255,255,0.88);
            backdrop-filter: blur(16px) saturate(180%);
            -webkit-backdrop-filter: blur(16px) saturate(180%);
            border-bottom: 1px solid rgba(226,232,240,0.6);
            transition: background var(--transition);
        }
        .site-header.scrolled { background: rgba(255,255,255,0.96); box-shadow: var(--shadow-sm); }
        .header-inner {
            display: flex; align-items: center; justify-content: space-between;
            height: var(--nav-height); max-width: var(--container); margin: 0 auto; padding: 0 24px;
        }
        .site-logo { font-size: 1.4rem; font-weight: 800; color: var(--primary); letter-spacing: -0.5px; display: flex; align-items: center; gap: 8px; }
        .site-logo:hover { color: var(--secondary); }
        .site-logo i { font-size: 1.2em; color: var(--secondary); }
        .nav-links { display: flex; align-items: center; gap: 8px; }
        .nav-links a {
            padding: 8px 18px; font-size: 0.92rem; font-weight: 500; color: var(--text-secondary);
            border-radius: var(--radius-sm); transition: all var(--transition);
            position: relative;
        }
        .nav-links a:hover { color: var(--primary); background: var(--surface-alt); }
        .nav-links a.active { color: var(--secondary); background: var(--secondary-light); font-weight: 600; }
        .nav-right { display: flex; align-items: center; gap: 12px; }
        .search-box {
            display: flex; align-items: center; gap: 8px;
            background: var(--surface-alt); border: 1px solid var(--border);
            border-radius: 100px; padding: 8px 16px; width: 200px;
            transition: all var(--transition);
        }
        .search-box:focus-within { border-color: var(--secondary); box-shadow: 0 0 0 3px rgba(37,99,235,0.12); background: var(--surface); }
        .search-box i { color: var(--text-muted); font-size: 0.9rem; }
        .search-box input { background: transparent; border: none; outline: none; width: 100%; font-size: 0.88rem; color: var(--text); }
        .search-box input::placeholder { color: var(--text-muted); }
        .menu-toggle { display: none; font-size: 1.4rem; color: var(--text); padding: 8px; border-radius: var(--radius-sm); }
        .menu-toggle:hover { background: var(--surface-alt); }

        /* ===== Hero ===== */
        .hero {
            position: relative; min-height: 90vh; display: flex; align-items: center;
            padding: 120px 0 80px; overflow: hidden; background: var(--primary);
        }
        .hero-bg {
            position: absolute; inset: 0; z-index: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover; background-position: center; background-repeat: no-repeat;
            opacity: 0.35; mix-blend-mode: overlay;
        }
        .hero-bg::after {
            content: ''; position: absolute; inset: 0;
            background: linear-gradient(135deg, rgba(15,27,45,0.85) 0%, rgba(37,99,235,0.30) 100%);
        }
        .hero-content { position: relative; z-index: 1; color: #fff; max-width: 720px; }
        .hero-badge { display: inline-block; padding: 6px 20px; border-radius: 100px; background: rgba(255,255,255,0.12); border: 1px solid rgba(255,255,255,0.18); font-size: 0.85rem; font-weight: 500; margin-bottom: 20px; backdrop-filter: blur(4px); }
        .hero h1 { font-size: 3.4rem; font-weight: 800; color: #fff; line-height: 1.15; letter-spacing: -1px; margin-bottom: 20px; }
        .hero h1 span { background: linear-gradient(135deg, var(--accent), #f97316); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .hero p { font-size: 1.2rem; color: rgba(255,255,255,0.75); max-width: 560px; line-height: 1.7; margin-bottom: 36px; }
        .hero-actions { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
        .hero-search {
            display: flex; align-items: center; gap: 8px;
            background: rgba(255,255,255,0.10); border: 1px solid rgba(255,255,255,0.20);
            border-radius: 100px; padding: 10px 20px; width: 280px;
            backdrop-filter: blur(8px); transition: all var(--transition);
        }
        .hero-search:focus-within { border-color: var(--accent); background: rgba(255,255,255,0.16); }
        .hero-search i { color: rgba(255,255,255,0.5); }
        .hero-search input { background: transparent; border: none; outline: none; width: 100%; font-size: 0.92rem; color: #fff; }
        .hero-search input::placeholder { color: rgba(255,255,255,0.45); }
        .hero-stats { display: flex; gap: 40px; margin-top: 48px; padding-top: 32px; border-top: 1px solid rgba(255,255,255,0.10); }
        .hero-stat h3 { font-size: 1.8rem; color: #fff; font-weight: 700; }
        .hero-stat p { font-size: 0.85rem; color: rgba(255,255,255,0.5); margin-bottom: 0; }

        /* ===== Features / Core ===== */
        .features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
        .feature-card {
            background: var(--surface); border-radius: var(--radius); padding: 36px 28px;
            border: 1px solid var(--border); transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .feature-card:hover { box-shadow: var(--shadow); transform: translateY(-6px); border-color: var(--secondary); }
        .feature-icon { width: 56px; height: 56px; border-radius: var(--radius); background: var(--secondary-light); display: flex; align-items: center; justify-content: center; font-size: 1.6rem; color: var(--secondary); margin-bottom: 20px; }
        .feature-card h3 { font-size: 1.2rem; margin-bottom: 10px; }
        .feature-card p { font-size: 0.92rem; color: var(--text-secondary); line-height: 1.7; }

        /* ===== Category Entry ===== */
        .category-showcase {
            display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center;
        }
        .category-image { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-lg); }
        .category-image img { width: 100%; height: 400px; object-fit: cover; transition: transform 0.6s; }
        .category-image:hover img { transform: scale(1.04); }
        .category-info h2 { margin-bottom: 16px; }
        .category-info p { color: var(--text-secondary); font-size: 1rem; line-height: 1.8; margin-bottom: 24px; }
        .category-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 24px; }

        /* ===== Latest Posts (CMS) ===== */
        .posts-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
        .post-card { background: var(--surface); border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border); box-shadow: var(--shadow-sm); transition: all var(--transition); }
        .post-card:hover { box-shadow: var(--shadow); transform: translateY(-4px); }
        .post-card .card-img { aspect-ratio: 16 / 10; }
        .post-body { padding: 20px; }
        .post-body .badge { margin-bottom: 10px; }
        .post-body h3 { font-size: 1.05rem; margin-bottom: 8px; line-height: 1.4; }
        .post-body h3 a { color: var(--primary); }
        .post-body h3 a:hover { color: var(--secondary); }
        .post-excerpt { font-size: 0.88rem; color: var(--text-secondary); line-height: 1.6; margin-bottom: 12px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .post-meta { display: flex; align-items: center; gap: 14px; font-size: 0.8rem; color: var(--text-muted); }
        .post-meta i { margin-right: 4px; }

        /* ===== Stats / Numbers ===== */
        .stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; text-align: center; }
        .stat-item { padding: 32px 20px; background: rgba(255,255,255,0.06); border-radius: var(--radius); border: 1px solid rgba(255,255,255,0.08); }
        .stat-number { font-size: 2.6rem; font-weight: 800; color: var(--accent); line-height: 1.2; margin-bottom: 4px; }
        .stat-label { font-size: 0.92rem; color: rgba(255,255,255,0.6); }

        /* ===== Process / Steps ===== */
        .steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; position: relative; }
        .step-item { text-align: center; padding: 32px 16px; position: relative; }
        .step-number { width: 48px; height: 48px; border-radius: 50%; background: var(--secondary); color: #fff; font-weight: 700; font-size: 1.2rem; display: flex; align-items: center; justify-content: center; margin: 0 auto 16px; }
        .step-item h4 { font-size: 1.05rem; margin-bottom: 8px; }
        .step-item p { font-size: 0.88rem; color: var(--text-secondary); line-height: 1.6; }
        .step-connector { display: none; }

        /* ===== FAQ ===== */
        .faq-list { max-width: 800px; margin: 0 auto; }
        .faq-item { border-bottom: 1px solid var(--border); padding: 20px 0; }
        .faq-question { display: flex; align-items: center; justify-content: space-between; font-weight: 600; font-size: 1.05rem; color: var(--primary); cursor: pointer; padding: 4px 0; transition: color var(--transition); }
        .faq-question:hover { color: var(--secondary); }
        .faq-question i { font-size: 1rem; color: var(--text-muted); transition: transform var(--transition); }
        .faq-question.open i { transform: rotate(180deg); color: var(--secondary); }
        .faq-answer { padding-top: 12px; font-size: 0.95rem; color: var(--text-secondary); line-height: 1.7; display: none; }
        .faq-answer.open { display: block; }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--primary); position: relative; overflow: hidden;
            padding: 80px 0;
        }
        .cta-section::before {
            content: ''; position: absolute; inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover; background-position: center; opacity: 0.10; mix-blend-mode: overlay;
        }
        .cta-content { position: relative; z-index: 1; text-align: center; color: #fff; max-width: 640px; margin: 0 auto; }
        .cta-content h2 { color: #fff; font-size: 2.2rem; margin-bottom: 16px; }
        .cta-content p { color: rgba(255,255,255,0.7); font-size: 1.05rem; margin-bottom: 32px; }
        .cta-actions { display: flex; align-items: center; justify-content: center; gap: 16px; flex-wrap: wrap; }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary); color: rgba(255,255,255,0.6);
            padding: 48px 0 32px; border-top: 1px solid rgba(255,255,255,0.06);
        }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 32px; }
        .footer-brand .site-logo { color: #fff; margin-bottom: 12px; }
        .footer-brand .site-logo i { color: var(--accent); }
        .footer-brand p { font-size: 0.88rem; line-height: 1.7; max-width: 320px; }
        .footer-col h4 { color: #fff; font-size: 0.95rem; margin-bottom: 16px; }
        .footer-col a { display: block; color: rgba(255,255,255,0.5); font-size: 0.88rem; padding: 4px 0; transition: color var(--transition); }
        .footer-col a:hover { color: var(--accent); }
        .footer-bottom { border-top: 1px solid rgba(255,255,255,0.06); padding-top: 24px; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; font-size: 0.82rem; }
        .footer-bottom a { color: rgba(255,255,255,0.4); }
        .footer-bottom a:hover { color: var(--accent); }
        .footer-social { display: flex; gap: 16px; }
        .footer-social a { width: 36px; height: 36px; border-radius: 50%; background: rgba(255,255,255,0.06); display: flex; align-items: center; justify-content: center; color: rgba(255,255,255,0.4); transition: all var(--transition); }
        .footer-social a:hover { background: var(--secondary); color: #fff; }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.7rem; }
            .hero h1 { font-size: 2.6rem; }
            .features-grid { grid-template-columns: repeat(2, 1fr); }
            .posts-grid { grid-template-columns: repeat(2, 1fr); }
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .steps-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .category-showcase { grid-template-columns: 1fr; }
            .category-image img { height: 280px; }
        }

        @media (max-width: 768px) {
            :root { --nav-height: 64px; }
            .section { padding: 56px 0; }
            h1 { font-size: 1.8rem; }
            h2 { font-size: 1.4rem; }
            .hero { min-height: 70vh; padding: 100px 0 60px; }
            .hero h1 { font-size: 2rem; }
            .hero p { font-size: 1rem; }
            .hero-stats { gap: 24px; flex-wrap: wrap; }
            .hero-stat h3 { font-size: 1.4rem; }
            .hero-search { width: 100%; }
            .nav-links { display: none; }
            .nav-links.open { display: flex; flex-direction: column; position: absolute; top: var(--nav-height); left: 0; right: 0; background: rgba(255,255,255,0.98); backdrop-filter: blur(16px); padding: 16px 24px; border-bottom: 1px solid var(--border); gap: 4px; }
            .nav-links.open a { padding: 12px 16px; width: 100%; }
            .menu-toggle { display: block; }
            .search-box { width: 140px; }
            .features-grid { grid-template-columns: 1fr; }
            .posts-grid { grid-template-columns: 1fr; }
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
            .steps-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .cta-content h2 { font-size: 1.6rem; }
            .hero-actions { flex-direction: column; align-items: stretch; }
            .hero-search { width: 100%; }
            .category-image img { height: 220px; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }

        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .hero h1 { font-size: 1.6rem; }
            .hero-stats { flex-direction: column; gap: 16px; }
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
            .stat-item { padding: 20px 12px; }
            .stat-number { font-size: 1.8rem; }
            .steps-grid { grid-template-columns: 1fr; }
            .search-box { width: 100px; }
            .search-box input { font-size: 0.8rem; }
            .btn-lg { padding: 14px 28px; font-size: 0.95rem; }
            .post-body { padding: 16px; }
        }

        /* ===== Utilities ===== */
        .text-center { text-align: center; }
        .mt-8 { margin-top: 8px; }
        .mt-16 { margin-top: 16px; }
        .mt-24 { margin-top: 24px; }
        .mt-32 { margin-top: 32px; }
        .mt-48 { margin-top: 48px; }
        .gap-8 { gap: 8px; }
        .gap-12 { gap: 12px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .flex-wrap { flex-wrap: wrap; }
        .w-full { width: 100%; }

        /* ===== Focus / Accessibility ===== */
        a:focus-visible, button:focus-visible, input:focus-visible { outline: 3px solid rgba(37,99,235,0.40); outline-offset: 2px; }

        /* ===== Animations ===== */
        @keyframes fadeInUp { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: translateY(0); } }
        .anim-fade { animation: fadeInUp 0.6s ease forwards; }
        .anim-delay-1 { animation-delay: 0.1s; }
        .anim-delay-2 { animation-delay: 0.2s; }
        .anim-delay-3 { animation-delay: 0.3s; }
        .anim-delay-4 { animation-delay: 0.4s; }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #3b82f6;
            --primary-bg: #eff6ff;
            --accent: #f59e0b;
            --accent-dark: #d97706;
            --accent-light: #fbbf24;
            --neutral-900: #0f172a;
            --neutral-800: #1e293b;
            --neutral-700: #334155;
            --neutral-600: #475569;
            --neutral-500: #64748b;
            --neutral-400: #94a3b8;
            --neutral-300: #cbd5e1;
            --neutral-200: #e2e8f0;
            --neutral-100: #f1f5f9;
            --neutral-50: #f8fafc;
            --white: #ffffff;
            --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.04);
            --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.08), 0 2px 6px rgba(15, 23, 42, 0.04);
            --shadow-lg: 0 12px 32px rgba(15, 23, 42, 0.10), 0 4px 12px rgba(15, 23, 42, 0.06);
            --shadow-xl: 0 20px 48px rgba(15, 23, 42, 0.12);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --radius-full: 9999px;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --container-max: 1200px;
            --container-pad: 24px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::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);
            font-size: 16px;
            line-height: 1.6;
            color: var(--neutral-800);
            background: var(--neutral-50);
        }
        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;
        }
        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: var(--neutral-900);
        }
        h1 {
            font-size: 2.75rem;
        }
        h2 {
            font-size: 2rem;
        }
        h3 {
            font-size: 1.375rem;
        }
        h4 {
            font-size: 1.125rem;
        }
        p {
            color: var(--neutral-700);
            margin-bottom: 1rem;
        }
        p:last-child {
            margin-bottom: 0;
        }

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

        /* ===== Header / 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-height);
            background: rgba(255, 255, 255, 0.88);
            backdrop-filter: blur(16px) saturate(180%);
            -webkit-backdrop-filter: blur(16px) saturate(180%);
            border-bottom: 1px solid var(--neutral-200);
            z-index: 1000;
            transition: box-shadow var(--transition);
        }
        .site-header.scrolled {
            box-shadow: var(--shadow-md);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 var(--container-pad);
        }
        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--neutral-900);
            letter-spacing: -0.02em;
            transition: opacity var(--transition);
        }
        .site-logo i {
            font-size: 1.5rem;
            color: var(--primary);
        }
        .site-logo:hover {
            opacity: 0.85;
            color: var(--neutral-900);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-links a {
            position: relative;
            padding: 8px 18px;
            font-size: 0.9375rem;
            font-weight: 500;
            color: var(--neutral-600);
            border-radius: var(--radius-sm);
            transition: background var(--transition), color var(--transition);
        }
        .nav-links a:hover {
            background: var(--neutral-100);
            color: var(--neutral-900);
        }
        .nav-links a.active {
            background: var(--primary-bg);
            color: var(--primary);
            font-weight: 600;
        }
        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: var(--radius-full);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .search-toggle {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 8px 16px;
            background: var(--neutral-100);
            border: 1px solid var(--neutral-200);
            border-radius: var(--radius-full);
            color: var(--neutral-500);
            font-size: 0.875rem;
            cursor: pointer;
            transition: background var(--transition), border-color var(--transition), box-shadow var(--transition);
        }
        .search-toggle i {
            font-size: 0.875rem;
        }
        .search-toggle:hover {
            background: var(--neutral-200);
            border-color: var(--neutral-300);
            box-shadow: var(--shadow-sm);
        }
        .search-toggle .kbd {
            display: inline-block;
            padding: 1px 6px;
            background: var(--white);
            border: 1px solid var(--neutral-300);
            border-radius: 4px;
            font-size: 0.75rem;
            font-weight: 500;
            color: var(--neutral-400);
            margin-left: 4px;
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            background: var(--primary);
            color: var(--white);
            font-size: 0.9375rem;
            font-weight: 600;
            border-radius: var(--radius-full);
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
        }
        .nav-cta i {
            font-size: 0.875rem;
        }
        .nav-cta:hover {
            background: var(--primary-dark);
            color: var(--white);
            transform: translateY(-1px);
            box-shadow: 0 4px 16px rgba(37, 99, 235, 0.35);
        }
        .mobile-menu-btn {
            display: none;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            width: 40px;
            height: 40px;
            background: transparent;
            border: none;
            border-radius: var(--radius-sm);
            cursor: pointer;
            gap: 5px;
            transition: background var(--transition);
        }
        .mobile-menu-btn:hover {
            background: var(--neutral-100);
        }
        .mobile-menu-btn span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--neutral-700);
            border-radius: 2px;
            transition: transform var(--transition), opacity var(--transition);
        }
        .mobile-menu-btn.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .mobile-menu-btn.open span:nth-child(2) {
            opacity: 0;
        }
        .mobile-menu-btn.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* ===== 移动端导航抽屉 ===== */
        .mobile-drawer {
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            padding: 32px var(--container-pad);
            display: none;
            flex-direction: column;
            gap: 16px;
            z-index: 999;
            overflow-y: auto;
            animation: drawerIn 0.3s ease;
        }
        .mobile-drawer.open {
            display: flex;
        }
        @keyframes drawerIn {
            from {
                opacity: 0;
                transform: translateY(-12px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .mobile-drawer a {
            display: block;
            padding: 14px 20px;
            font-size: 1.125rem;
            font-weight: 500;
            color: var(--neutral-700);
            border-radius: var(--radius-sm);
            transition: background var(--transition), color var(--transition);
        }
        .mobile-drawer a:hover {
            background: var(--neutral-100);
            color: var(--neutral-900);
        }
        .mobile-drawer a.active {
            background: var(--primary-bg);
            color: var(--primary);
            font-weight: 600;
        }
        .mobile-drawer .mobile-cta {
            margin-top: 12px;
            padding: 16px 24px;
            background: var(--primary);
            color: var(--white);
            text-align: center;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 1.0625rem;
        }
        .mobile-drawer .mobile-cta:hover {
            background: var(--primary-dark);
            color: var(--white);
        }

        /* ===== Hero / 内页横幅 ===== */
        .page-hero {
            position: relative;
            margin-top: var(--header-height);
            min-height: 380px;
            display: flex;
            align-items: center;
            background: var(--neutral-900);
            overflow: hidden;
        }
        .page-hero .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.5;
            mix-blend-mode: overlay;
        }
        .page-hero .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.88) 0%, rgba(30, 58, 138, 0.70) 100%);
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
            padding-top: 60px;
            padding-bottom: 60px;
        }
        .page-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 18px;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: var(--radius-full);
            color: var(--neutral-200);
            font-size: 0.8125rem;
            font-weight: 500;
            margin-bottom: 24px;
        }
        .page-hero .hero-badge i {
            color: var(--accent);
        }
        .page-hero h1 {
            font-size: 3rem;
            color: var(--white);
            margin-bottom: 20px;
            letter-spacing: -0.02em;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
        }
        .page-hero h1 span {
            color: var(--accent-light);
        }
        .page-hero .hero-sub {
            font-size: 1.1875rem;
            color: var(--neutral-300);
            max-width: 680px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }
        .page-hero .hero-actions {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
        }
        .page-hero .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            background: var(--primary);
            color: var(--white);
            font-size: 1rem;
            font-weight: 600;
            border: none;
            border-radius: var(--radius-full);
            cursor: pointer;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
        }
        .page-hero .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(37, 99, 235, 0.40);
        }
        .page-hero .btn-outline-light {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            background: transparent;
            color: var(--white);
            font-size: 1rem;
            font-weight: 600;
            border: 1.5px solid rgba(255, 255, 255, 0.30);
            border-radius: var(--radius-full);
            cursor: pointer;
            transition: background var(--transition), border-color var(--transition), transform var(--transition);
        }
        .page-hero .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.10);
            border-color: rgba(255, 255, 255, 0.50);
            transform: translateY(-2px);
        }

        /* ===== 面包屑 ===== */
        .breadcrumb {
            padding: 20px 0;
            background: var(--white);
            border-bottom: 1px solid var(--neutral-200);
        }
        .breadcrumb .container {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.875rem;
            color: var(--neutral-500);
        }
        .breadcrumb a {
            color: var(--neutral-500);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .sep {
            color: var(--neutral-400);
            font-size: 0.75rem;
        }
        .breadcrumb .current {
            color: var(--neutral-800);
            font-weight: 500;
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--white);
        }
        .section-dark {
            background: var(--neutral-900);
            color: var(--neutral-300);
        }
        .section-dark h2,
        .section-dark h3 {
            color: var(--white);
        }
        .section-header {
            text-align: center;
            margin-bottom: 56px;
        }
        .section-header h2 {
            margin-bottom: 16px;
        }
        .section-header .section-desc {
            max-width: 620px;
            margin: 0 auto;
            color: var(--neutral-500);
            font-size: 1.0625rem;
            line-height: 1.7;
        }
        .section-header .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 16px;
            background: var(--primary-bg);
            color: var(--primary);
            font-size: 0.8125rem;
            font-weight: 600;
            border-radius: var(--radius-full);
            margin-bottom: 16px;
        }

        /* ===== 卡片网格 ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .card-item {
            background: var(--white);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--neutral-200);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .card-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .card-item .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            background: var(--neutral-100);
        }
        .card-item .card-body {
            padding: 24px;
        }
        .card-item .card-tag {
            display: inline-block;
            padding: 2px 12px;
            background: var(--primary-bg);
            color: var(--primary);
            font-size: 0.75rem;
            font-weight: 600;
            border-radius: var(--radius-full);
            margin-bottom: 12px;
        }
        .card-item h3 {
            font-size: 1.1875rem;
            margin-bottom: 10px;
            color: var(--neutral-900);
        }
        .card-item p {
            font-size: 0.9375rem;
            color: var(--neutral-600);
            margin-bottom: 16px;
            line-height: 1.6;
        }
        .card-item .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 600;
            font-size: 0.9375rem;
            color: var(--primary);
        }
        .card-item .card-link i {
            font-size: 0.75rem;
            transition: transform var(--transition);
        }
        .card-item .card-link:hover i {
            transform: translateX(4px);
        }

        /* ===== 指南列表 ===== */
        .guide-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .guide-item {
            display: flex;
            gap: 20px;
            padding: 24px;
            background: var(--white);
            border-radius: var(--radius-md);
            border: 1px solid var(--neutral-200);
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .guide-item:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .guide-item .guide-icon {
            flex-shrink: 0;
            width: 52px;
            height: 52px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary-bg);
            border-radius: var(--radius-sm);
            color: var(--primary);
            font-size: 1.375rem;
        }
        .guide-item .guide-content h4 {
            font-size: 1.0625rem;
            margin-bottom: 6px;
            color: var(--neutral-900);
        }
        .guide-item .guide-content p {
            font-size: 0.875rem;
            color: var(--neutral-600);
            line-height: 1.6;
            margin-bottom: 0;
        }
        .guide-item .guide-content .guide-meta {
            display: flex;
            gap: 16px;
            margin-top: 10px;
            font-size: 0.8125rem;
            color: var(--neutral-400);
        }
        .guide-item .guide-content .guide-meta i {
            margin-right: 4px;
        }

        /* ===== 流程步骤 ===== */
        .steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            counter-reset: step;
        }
        .step-item {
            text-align: center;
            counter-increment: step;
        }
        .step-item .step-number {
            width: 64px;
            height: 64px;
            margin: 0 auto 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary-bg);
            color: var(--primary);
            font-size: 1.5rem;
            font-weight: 700;
            border-radius: var(--radius-full);
            position: relative;
        }
        .step-item .step-number::after {
            content: '';
            position: absolute;
            top: 50%;
            left: calc(100% + 16px);
            width: calc(100% - 32px);
            height: 2px;
            background: var(--neutral-200);
            display: none;
        }
        .step-item:not(:last-child) .step-number::after {
            display: block;
        }
        .step-item h4 {
            font-size: 1.0625rem;
            margin-bottom: 8px;
            color: var(--neutral-900);
        }
        .step-item p {
            font-size: 0.875rem;
            color: var(--neutral-600);
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--white);
            border: 1px solid var(--neutral-200);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-sm);
        }
        .faq-item .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--neutral-900);
            cursor: pointer;
            background: transparent;
            border: none;
            width: 100%;
            text-align: left;
            gap: 16px;
            transition: background var(--transition);
        }
        .faq-item .faq-question:hover {
            background: var(--neutral-50);
        }
        .faq-item .faq-question i {
            font-size: 0.875rem;
            color: var(--neutral-400);
            transition: transform var(--transition);
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-item .faq-answer {
            padding: 0 24px 20px;
            font-size: 0.9375rem;
            color: var(--neutral-600);
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            background: var(--neutral-900);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .cta-section h2 {
            color: var(--white);
            font-size: 2.25rem;
            margin-bottom: 16px;
        }
        .cta-section p {
            color: var(--neutral-400);
            font-size: 1.125rem;
            max-width: 560px;
            margin: 0 auto 32px;
        }
        .cta-section .cta-actions {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
        }
        .cta-section .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 36px;
            background: var(--accent);
            color: var(--neutral-900);
            font-size: 1.0625rem;
            font-weight: 700;
            border: none;
            border-radius: var(--radius-full);
            cursor: pointer;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
        }
        .cta-section .btn-cta:hover {
            background: var(--accent-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(245, 158, 11, 0.35);
        }
        .cta-section .btn-outline-cta {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 36px;
            background: transparent;
            color: var(--white);
            font-size: 1.0625rem;
            font-weight: 600;
            border: 1.5px solid rgba(255, 255, 255, 0.25);
            border-radius: var(--radius-full);
            cursor: pointer;
            transition: background var(--transition), border-color var(--transition), transform var(--transition);
        }
        .cta-section .btn-outline-cta:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(255, 255, 255, 0.45);
            transform: translateY(-2px);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--neutral-900);
            color: var(--neutral-400);
            padding: 60px 0 0;
            border-top: 1px solid var(--neutral-800);
        }
        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid var(--neutral-800);
        }
        .site-footer .site-logo {
            color: var(--white);
            margin-bottom: 16px;
        }
        .site-footer .site-logo i {
            color: var(--primary-light);
        }
        .site-footer .footer-brand p {
            font-size: 0.9375rem;
            color: var(--neutral-500);
            line-height: 1.7;
            max-width: 360px;
        }
        .site-footer .footer-col h4 {
            font-size: 0.9375rem;
            font-weight: 600;
            color: var(--neutral-300);
            margin-bottom: 20px;
            letter-spacing: 0.03em;
        }
        .site-footer .footer-col a {
            display: block;
            font-size: 0.9375rem;
            color: var(--neutral-500);
            padding: 6px 0;
            transition: color var(--transition);
        }
        .site-footer .footer-col a:hover {
            color: var(--neutral-200);
        }
        .site-footer .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-full);
            color: var(--neutral-400);
            font-size: 1.125rem;
            margin-right: 8px;
            transition: background var(--transition), color var(--transition);
        }
        .site-footer .footer-social a:hover {
            background: var(--primary);
            color: var(--white);
        }
        .site-footer .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            padding: 24px 0;
            font-size: 0.8125rem;
            color: var(--neutral-600);
            gap: 12px;
        }
        .site-footer .footer-bottom a {
            color: var(--neutral-600);
        }
        .site-footer .footer-bottom a:hover {
            color: var(--neutral-300);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps {
                grid-template-columns: repeat(2, 1fr);
                gap: 40px;
            }
            .step-item .step-number::after {
                display: none !important;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .guide-list {
                grid-template-columns: 1fr;
            }
            .page-hero h1 {
                font-size: 2.5rem;
            }
        }

        @media (max-width: 768px) {
            :root {
                --container-pad: 20px;
                --header-height: 64px;
            }
            .nav-links,
            .nav-actions .search-toggle,
            .nav-actions .nav-cta {
                display: none;
            }
            .mobile-menu-btn {
                display: flex;
            }
            .page-hero {
                min-height: 320px;
            }
            .page-hero h1 {
                font-size: 2rem;
            }
            .page-hero .hero-sub {
                font-size: 1rem;
            }
            .section {
                padding: 56px 0;
            }
            .section-header {
                margin-bottom: 40px;
            }
            .section-header h2 {
                font-size: 1.625rem;
            }
            .card-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .steps {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .guide-item {
                flex-direction: column;
                align-items: flex-start;
            }
            .guide-item .guide-icon {
                width: 44px;
                height: 44px;
                font-size: 1.125rem;
            }
            .page-hero .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .page-hero .btn-primary,
            .page-hero .btn-outline-light {
                width: 100%;
                justify-content: center;
            }
            .cta-section h2 {
                font-size: 1.75rem;
            }
            .cta-section .cta-actions {
                flex-direction: column;
                align-items: center;
            }
            .cta-section .btn-cta,
            .cta-section .btn-outline-cta {
                width: 100%;
                justify-content: center;
            }
            .breadcrumb {
                padding: 14px 0;
                font-size: 0.8125rem;
            }
        }

        @media (max-width: 520px) {
            .page-hero h1 {
                font-size: 1.625rem;
            }
            .page-hero .hero-sub {
                font-size: 0.9375rem;
            }
            .section-header h2 {
                font-size: 1.375rem;
            }
            .steps {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .step-item .step-number {
                width: 52px;
                height: 52px;
                font-size: 1.25rem;
            }
            .faq-item .faq-question {
                font-size: 0.9375rem;
                padding: 16px 18px;
            }
            .faq-item .faq-answer {
                font-size: 0.875rem;
                padding: 0 18px 16px;
            }
            .card-item .card-body {
                padding: 18px;
            }
            .card-item .card-img {
                height: 160px;
            }
            .site-footer {
                padding: 40px 0 0;
            }
            .nav-actions .search-toggle .kbd {
                display: none;
            }
        }

        /* ===== 辅助 ===== */
        .text-center {
            text-align: center;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .mt-48 {
            margin-top: 48px;
        }
        .gap-8 {
            gap: 8px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
:root {
  --primary: #1e3a5f;
  --primary-light: #2a4f7a;
  --primary-dark: #14283f;
  --accent: #e8a838;
  --accent-light: #f0c060;
  --accent-dark: #c88a1a;
  --bg: #f5f7fa;
  --bg-card: #ffffff;
  --bg-dark: #1a2a3a;
  --text: #1a1a2e;
  --text-light: #5a6a7a;
  --text-white: #f0f4f8;
  --border: #e2e8f0;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --shadow: 0 2px 12px rgba(0,0,0,0.06);
  --shadow-hover: 0 8px 30px rgba(0,0,0,0.10);
  --transition: 0.25s ease;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --max-width: 1180px;
  --header-h: 72px;
}
/* ===== Reset / Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent); }
img { max-width: 100%; height: auto; display: block; }
input, button, textarea { font-family: inherit; font-size: 1rem; outline: none; border: none; }
button { cursor: pointer; background: none; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text); }
h1 { font-size: 2.4rem; }
h2 { font-size: 1.8rem; }
h3 { font-size: 1.35rem; }
h4 { font-size: 1.1rem; }
p { margin-bottom: 1rem; }
/* ===== 容器 ===== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}
/* ===== Header / 导航 ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-h);
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  transition: var(--transition);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  gap: 16px;
}
.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.3px;
  white-space: nowrap;
}
.site-logo i { color: var(--accent); font-size: 1.5rem; }
.site-logo:hover { color: var(--primary); }
.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-links a {
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  font-weight: 500;
  color: var(--text-light);
  font-size: 0.95rem;
  transition: var(--transition);
  position: relative;
}
.nav-links a:hover { color: var(--primary); background: rgba(30,58,95,0.06); }
.nav-links a.active {
  color: var(--primary);
  background: rgba(30,58,95,0.08);
  font-weight: 600;
}
.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 3px;
  background: var(--accent);
  border-radius: 4px;
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}
.search-box {
  display: flex;
  align-items: center;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 40px;
  padding: 0 16px;
  height: 40px;
  gap: 8px;
  transition: var(--transition);
  min-width: 180px;
}
.search-box:focus-within { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(232,168,56,0.15); }
.search-box i { color: var(--text-light); font-size: 0.9rem; }
.search-box input { background: transparent; border: none; height: 100%; width: 100%; color: var(--text); font-size: 0.9rem; }
.search-box input::placeholder { color: var(--text-light); }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 24px;
  border-radius: 40px;
  font-weight: 600;
  font-size: 0.9rem;
  transition: var(--transition);
  border: none;
  cursor: pointer;
  white-space: nowrap;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-light); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(30,58,95,0.25); }
.btn-accent { background: var(--accent); color: #1a1a2e; }
.btn-accent:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(232,168,56,0.3); }
.btn-outline { background: transparent; color: var(--primary); border: 2px solid var(--primary); }
.btn-outline:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }
.btn-sm { padding: 6px 16px; font-size: 0.85rem; }
.mobile-toggle { display: none; font-size: 1.5rem; color: var(--text); padding: 4px; }
/* ===== Hero 文章头 ===== */
.page-hero {
  padding: calc(var(--header-h) + 40px) 0 50px;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
  position: relative;
  overflow: hidden;
  min-height: 260px;
  display: flex;
  align-items: center;
}
.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  opacity: 0.18;
  mix-blend-mode: overlay;
}
.page-hero .container { position: relative; z-index: 2; width: 100%; }
.hero-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.hero-cat {
  display: inline-block;
  padding: 4px 16px;
  background: var(--accent);
  color: #1a1a2e;
  border-radius: 40px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.3px;
}
.hero-date {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.75);
  display: flex;
  align-items: center;
  gap: 6px;
}
.hero-date i { font-size: 0.8rem; }
.page-hero h1 {
  color: #fff;
  font-size: 2.2rem;
  max-width: 880px;
  line-height: 1.3;
  text-shadow: 0 2px 8px rgba(0,0,0,0.15);
}
.hero-sub {
  color: rgba(255,255,255,0.6);
  font-size: 1rem;
  margin-top: 8px;
  max-width: 700px;
}
/* ===== 正文区 ===== */
.article-section { padding: 50px 0 30px; }
.article-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 40px;
}
.article-main { min-width: 0; }
.article-body {
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 36px 40px;
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--text);
}
.article-body h2, .article-body h3 { margin-top: 1.8em; margin-bottom: 0.6em; }
.article-body p { margin-bottom: 1.2em; }
.article-body img { border-radius: var(--radius-sm); margin: 1.5em 0; }
.article-body ul, .article-body ol { margin-bottom: 1.2em; padding-left: 1.8em; }
.article-body li { margin-bottom: 0.4em; list-style: disc; }
.article-body blockquote {
  border-left: 4px solid var(--accent);
  padding: 12px 20px;
  margin: 1.5em 0;
  background: rgba(232,168,56,0.06);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-light);
  font-style: italic;
}
.article-body a { color: var(--accent-dark); text-decoration: underline; }
.article-body a:hover { color: var(--accent); }
.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 30px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}
.tag {
  display: inline-block;
  padding: 4px 14px;
  background: var(--bg);
  border-radius: 40px;
  font-size: 0.8rem;
  color: var(--text-light);
  font-weight: 500;
  transition: var(--transition);
}
.tag:hover { background: var(--accent); color: #1a1a2e; }
.article-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 30px;
  gap: 16px;
  flex-wrap: wrap;
}
.article-nav a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  transition: var(--transition);
}
.article-nav a:hover { border-color: var(--accent); background: rgba(232,168,56,0.06); }
/* ===== 侧边栏 ===== */
.article-sidebar { min-width: 0; }
.sidebar-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
  margin-bottom: 24px;
}
.sidebar-card h4 {
  font-size: 1.05rem;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--primary);
}
.sidebar-card h4 i { color: var(--accent); }
.sidebar-list li { margin-bottom: 10px; }
.sidebar-list a {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}
.sidebar-list a:hover { border-color: var(--accent); }
.sidebar-list a img {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  flex-shrink: 0;
}
.sidebar-list .s-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.sidebar-list .s-date {
  font-size: 0.75rem;
  color: var(--text-light);
  margin-top: 4px;
}
/* ===== 相关内容 ===== */
.related-section { padding: 30px 0 50px; }
.related-section h2 {
  text-align: center;
  margin-bottom: 32px;
  font-size: 1.6rem;
  position: relative;
}
.related-section h2::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: var(--accent);
  border-radius: 4px;
  margin: 10px auto 0;
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.related-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
}
.related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.related-card img {
  width: 100%;
  height: 160px;
  object-fit: cover;
}
.related-card .rc-body { padding: 16px 18px 20px; }
.related-card .rc-body h4 { font-size: 0.95rem; margin-bottom: 6px; }
.related-card .rc-body h4 a { color: var(--text); }
.related-card .rc-body h4 a:hover { color: var(--accent); }
.related-card .rc-body p {
  font-size: 0.85rem;
  color: var(--text-light);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 0;
}
.related-card .rc-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 10px;
  font-size: 0.75rem;
  color: var(--text-light);
}
.related-card .rc-meta .rc-cat {
  padding: 2px 10px;
  background: var(--bg);
  border-radius: 40px;
  font-weight: 500;
}
/* ===== 暂无内容 ===== */
.not-found-box {
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 60px 40px;
  text-align: center;
}
.not-found-box i { font-size: 3rem; color: var(--text-light); margin-bottom: 20px; }
.not-found-box h2 { font-size: 1.6rem; margin-bottom: 12px; }
.not-found-box p { color: var(--text-light); margin-bottom: 20px; }
/* ===== CTA ===== */
.cta-section {
  padding: 50px 0;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-3.png') center/cover no-repeat;
  opacity: 0.10;
  mix-blend-mode: overlay;
}
.cta-section .container { position: relative; z-index: 2; text-align: center; }
.cta-section h2 { color: #fff; font-size: 1.8rem; margin-bottom: 12px; }
.cta-section p { color: rgba(255,255,255,0.8); max-width: 600px; margin: 0 auto 24px; font-size: 1rem; }
.cta-section .btn { font-size: 1rem; padding: 14px 36px; }
/* ===== 页脚 ===== */
.site-footer {
  background: var(--bg-dark);
  color: rgba(255,255,255,0.7);
  padding: 50px 0 0;
  font-size: 0.9rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  padding-bottom: 30px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand .site-logo { color: #fff; margin-bottom: 14px; font-size: 1.3rem; }
.footer-brand .site-logo i { color: var(--accent); }
.footer-brand p { font-size: 0.88rem; line-height: 1.7; color: rgba(255,255,255,0.6); max-width: 360px; }
.footer-col h4 { color: #fff; font-size: 0.95rem; margin-bottom: 16px; font-weight: 600; }
.footer-col a {
  display: block;
  color: rgba(255,255,255,0.6);
  padding: 4px 0;
  font-size: 0.88rem;
  transition: var(--transition);
}
.footer-col a:hover { color: var(--accent); padding-left: 4px; }
.footer-social { display: flex; gap: 12px; }
.footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  color: rgba(255,255,255,0.7);
  font-size: 1rem;
  transition: var(--transition);
}
.footer-social a:hover { background: var(--accent); color: #1a1a2e; padding-left: 0; }
.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.4);
  gap: 12px;
}
.footer-bottom a { color: rgba(255,255,255,0.5); }
.footer-bottom a:hover { color: var(--accent); }
/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .article-layout { grid-template-columns: 1fr; }
  .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
  .related-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
}
@media (max-width: 768px) {
  .header-inner { gap: 8px; }
  .nav-links { display: none; }
  .mobile-toggle { display: flex; align-items: center; }
  .header-actions .search-box { min-width: 120px; }
  .header-actions .btn-primary { display: none; }
  .page-hero { padding: calc(var(--header-h) + 24px) 0 32px; min-height: 200px; }
  .page-hero h1 { font-size: 1.6rem; }
  .article-body { padding: 24px 20px; }
  .article-sidebar { grid-template-columns: 1fr; }
  .related-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .cta-section h2 { font-size: 1.4rem; }
}
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .page-hero h1 { font-size: 1.3rem; }
  .hero-meta { gap: 10px; }
  .header-actions .search-box { min-width: 80px; }
  .article-body { padding: 18px 14px; font-size: 0.95rem; }
  .related-card img { height: 120px; }
  .cta-section .btn { width: 100%; }
}
/* ===== 移动端菜单 ===== */
.mobile-menu {
  display: none;
  position: fixed;
  top: var(--header-h);
  left: 0;
  width: 100%;
  background: rgba(255,255,255,0.98);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 16px 24px;
  z-index: 999;
  box-shadow: var(--shadow);
}
.mobile-menu.open { display: block; }
.mobile-menu a {
  display: block;
  padding: 12px 0;
  font-weight: 500;
  font-size: 1rem;
  color: var(--text);
  border-bottom: 1px solid var(--border);
}
.mobile-menu a:last-child { border-bottom: none; }
.mobile-menu a.active { color: var(--accent); font-weight: 600; }
.mobile-menu .btn { width: 100%; margin-top: 12px; justify-content: center; }