/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a5cff;
            --primary-dark: #0d3ea8;
            --primary-light: #e8f0ff;
            --accent: #f5a623;
            --accent-dark: #d98e1a;
            --bg-main: #ffffff;
            --bg-soft: #f7f9fc;
            --bg-dark: #0f172a;
            --text-main: #1e293b;
            --text-secondary: #475569;
            --text-light: #94a3b8;
            --text-white: #ffffff;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.08), 0 2px 4px rgba(0,0,0,0.04);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.10), 0 4px 12px rgba(0,0,0,0.06);
            --space-xs: 0.5rem;
            --space-sm: 1rem;
            --space-md: 2rem;
            --space-lg: 4rem;
            --space-xl: 6rem;
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: var(--font-sans);
            color: var(--text-main);
            background: var(--bg-main);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--primary-dark); }
        a:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; border-radius: 2px; }
        img { max-width: 100%; height: auto; display: block; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { font-weight: 600; line-height: 1.3; color: var(--text-main); }
        p { margin-bottom: 1rem; color: var(--text-secondary); }

        /* ===== Container ===== */
        .container { max-width: 1200px; margin: 0 auto; padding: 0 var(--space-sm); width: 100%; }
        .container-narrow { max-width: 960px; }
        .container-wide { max-width: 1360px; }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
            padding: 0.7rem 1.6rem; font-size: 0.95rem; font-weight: 500; line-height: 1.4;
            border-radius: var(--radius-sm); border: none; cursor: pointer;
            transition: all var(--transition); text-decoration: none; font-family: inherit;
            white-space: nowrap;
        }
        .btn:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); }
        .btn:active { transform: translateY(0); }
        .btn-primary { background: var(--primary); color: var(--text-white); }
        .btn-primary:hover { background: var(--primary-dark); color: var(--text-white); }
        .btn-accent { background: var(--accent); color: #1e293b; }
        .btn-accent:hover { background: var(--accent-dark); color: #1e293b; }
        .btn-outline { background: transparent; color: var(--primary); border: 1.5px solid var(--primary); }
        .btn-outline:hover { background: var(--primary); color: var(--text-white); }
        .btn-white { background: var(--text-white); color: var(--primary); }
        .btn-white:hover { background: var(--bg-soft); color: var(--primary-dark); }
        .btn-lg { padding: 1rem 2.4rem; font-size: 1.05rem; border-radius: var(--radius-md); }
        .btn-sm { padding: 0.45rem 1.1rem; font-size: 0.85rem; }

        /* ===== Badge / Tag ===== */
        .badge {
            display: inline-block; padding: 0.2rem 0.8rem; font-size: 0.78rem; font-weight: 500;
            border-radius: 100px; background: var(--primary-light); color: var(--primary);
        }
        .badge-accent { background: #fef3c7; color: #b45309; }
        .badge-green { background: #dcfce7; color: #15803d; }

        /* ===== Cards ===== */
        .card {
            background: var(--bg-main); border-radius: var(--radius-md);
            border: 1px solid var(--border); box-shadow: var(--shadow-sm);
            transition: all var(--transition); overflow: hidden;
        }
        .card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
        .card-body { padding: var(--space-md); }
        .card-img { width: 100%; aspect-ratio: 16/9; object-fit: cover; }
        .card-title { font-size: 1.1rem; font-weight: 600; margin-bottom: 0.5rem; }
        .card-text { font-size: 0.92rem; color: var(--text-secondary); line-height: 1.6; }

        /* ===== Section Spacing ===== */
        .section { padding: var(--space-xl) 0; }
        .section-sm { padding: var(--space-lg) 0; }
        .section-header { text-align: center; margin-bottom: var(--space-lg); }
        .section-header h2 { font-size: 2rem; margin-bottom: 0.75rem; }
        .section-header p { font-size: 1.05rem; max-width: 640px; margin: 0 auto; color: var(--text-secondary); }
        .section-header .badge { margin-bottom: 0.75rem; }

        /* ===== Navigation ===== */
        .site-header {
            position: sticky; top: 0; z-index: 100;
            background: rgba(255,255,255,0.90); backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border); box-shadow: 0 1px 4px rgba(0,0,0,0.02);
        }
        .nav-bar {
            display: flex; align-items: center; justify-content: space-between;
            height: 68px; gap: var(--space-sm);
        }
        .nav-logo { display: flex; align-items: center; gap: 0.5rem; font-size: 1.25rem; font-weight: 700; color: var(--text-main); text-decoration: none; flex-shrink: 0; }
        .nav-logo:hover { color: var(--primary); }
        .nav-logo i { color: var(--primary); font-size: 1.4rem; }
        .nav-links { display: flex; align-items: center; gap: 0.25rem; }
        .nav-links a {
            padding: 0.5rem 1rem; font-size: 0.92rem; font-weight: 500; color: var(--text-secondary);
            border-radius: var(--radius-sm); transition: all var(--transition); text-decoration: none;
        }
        .nav-links a:hover, .nav-links a.active { color: var(--primary); background: var(--primary-light); }
        .nav-links a.active { font-weight: 600; }
        .nav-actions { display: flex; align-items: center; gap: 0.75rem; flex-shrink: 0; }
        .nav-search {
            display: flex; align-items: center; background: var(--bg-soft); border: 1px solid var(--border);
            border-radius: 100px; padding: 0.35rem 1rem 0.35rem 1.2rem; transition: all var(--transition);
        }
        .nav-search:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(26,92,255,0.12); }
        .nav-search input {
            border: none; background: transparent; padding: 0.35rem 0; font-size: 0.88rem;
            outline: none; color: var(--text-main); min-width: 100px; font-family: inherit;
        }
        .nav-search input::placeholder { color: var(--text-light); }
        .nav-search i { color: var(--text-light); font-size: 0.9rem; cursor: pointer; }
        .nav-toggle { display: none; background: none; border: none; font-size: 1.4rem; color: var(--text-main); cursor: pointer; padding: 0.25rem; }

        /* Mobile Nav */
        @media (max-width: 880px) {
            .nav-links, .nav-actions { display: none; }
            .nav-toggle { display: block; }
            .nav-menu-open .nav-links,
            .nav-menu-open .nav-actions {
                display: flex; flex-direction: column; align-items: stretch;
                position: absolute; top: 68px; left: 0; right: 0;
                background: rgba(255,255,255,0.98); backdrop-filter: blur(16px);
                border-bottom: 1px solid var(--border); padding: var(--space-md);
                box-shadow: var(--shadow-lg); gap: 0.25rem;
            }
            .nav-menu-open .nav-actions { top: auto; margin-top: 0.5rem; }
            .nav-menu-open .nav-links a { padding: 0.75rem 1rem; font-size: 1rem; }
            .nav-menu-open .nav-search { width: 100%; }
        }

        /* ===== Hero ===== */
        .hero {
            position: relative; min-height: 82vh; display: flex; align-items: center;
            background: var(--bg-dark); color: var(--text-white); overflow: hidden;
        }
        .hero-bg {
            position: absolute; inset: 0; background-size: cover; background-position: center;
            background-repeat: no-repeat; opacity: 0.35; z-index: 0;
        }
        .hero-bg::after {
            content: ''; position: absolute; inset: 0;
            background: linear-gradient(135deg, rgba(15,23,42,0.88) 0%, rgba(15,23,42,0.40) 100%);
        }
        .hero-content { position: relative; z-index: 1; padding: var(--space-lg) 0; width: 100%; }
        .hero h1 { font-size: 3rem; font-weight: 700; line-height: 1.2; margin-bottom: 1.2rem; max-width: 800px; color: var(--text-white); }
        .hero p { font-size: 1.15rem; line-height: 1.7; max-width: 600px; color: rgba(255,255,255,0.80); margin-bottom: 2rem; }
        .hero-actions { display: flex; flex-wrap: wrap; gap: var(--space-sm); }
        .hero-stats { display: flex; flex-wrap: wrap; gap: var(--space-lg); margin-top: var(--space-lg); padding-top: var(--space-md); border-top: 1px solid rgba(255,255,255,0.12); }
        .hero-stat h3 { font-size: 1.8rem; font-weight: 700; color: var(--text-white); margin-bottom: 0.15rem; }
        .hero-stat p { font-size: 0.88rem; color: rgba(255,255,255,0.60); margin: 0; }

        @media (max-width: 768px) {
            .hero h1 { font-size: 2rem; }
            .hero p { font-size: 1rem; }
            .hero-stats { gap: var(--space-md); }
            .hero-stat h3 { font-size: 1.4rem; }
        }

        /* ===== Features / Service Grid ===== */
        .service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-md); }
        .service-card {
            background: var(--bg-main); border-radius: var(--radius-md); padding: var(--space-md);
            border: 1px solid var(--border); transition: all var(--transition);
            text-align: center;
        }
        .service-card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); border-color: var(--primary-light); }
        .service-card .icon { width: 56px; height: 56px; border-radius: var(--radius-md); background: var(--primary-light); color: var(--primary); display: flex; align-items: center; justify-content: center; font-size: 1.5rem; margin: 0 auto 1rem; }
        .service-card h3 { font-size: 1.1rem; margin-bottom: 0.5rem; }
        .service-card p { font-size: 0.9rem; color: var(--text-secondary); margin: 0; }
        @media (max-width: 768px) { .service-grid { grid-template-columns: 1fr; } }
        @media (min-width: 769px) and (max-width: 1024px) { .service-grid { grid-template-columns: repeat(2, 1fr); } }

        /* ===== Content / CMS List ===== */
        .content-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-md); }
        .content-card .card-img-wrap { overflow: hidden; }
        .content-card .card-img { transition: transform 0.4s ease; aspect-ratio: 16/9; }
        .content-card:hover .card-img { transform: scale(1.04); }
        .content-card .card-meta { display: flex; align-items: center; gap: 0.75rem; font-size: 0.82rem; color: var(--text-light); margin-top: 0.75rem; }
        .content-card .card-meta .badge { font-size: 0.72rem; }
        .content-card .card-title a { color: var(--text-main); text-decoration: none; }
        .content-card .card-title a:hover { color: var(--primary); }
        .cms-empty { text-align: center; padding: var(--space-lg); color: var(--text-light); font-size: 1rem; border: 1px dashed var(--border); border-radius: var(--radius-md); background: var(--bg-soft); }
        @media (max-width: 768px) { .content-grid { grid-template-columns: 1fr; } }
        @media (min-width: 769px) and (max-width: 1024px) { .content-grid { grid-template-columns: repeat(2, 1fr); } }

        /* ===== Stats / Data Section ===== */
        .stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-md); text-align: center; }
        .stats-item h3 { font-size: 2.4rem; font-weight: 700; color: var(--primary); margin-bottom: 0.25rem; }
        .stats-item p { font-size: 0.92rem; color: var(--text-secondary); margin: 0; }
        @media (max-width: 768px) { .stats-grid { grid-template-columns: repeat(2, 1fr); gap: var(--space-sm); } }
        @media (max-width: 520px) { .stats-grid { grid-template-columns: 1fr 1fr; } }

        /* ===== Feature List (图文混合) ===== */
        .feature-row { display: flex; align-items: center; gap: var(--space-xl); }
        .feature-row.reverse { flex-direction: row-reverse; }
        .feature-col { flex: 1; min-width: 0; }
        .feature-col img { border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); width: 100%; }
        .feature-col h3 { font-size: 1.6rem; margin-bottom: 1rem; }
        .feature-col p { font-size: 0.98rem; line-height: 1.7; }
        .feature-list { margin-top: var(--space-sm); }
        .feature-list li { display: flex; align-items: flex-start; gap: 0.65rem; padding: 0.4rem 0; font-size: 0.95rem; color: var(--text-secondary); }
        .feature-list li i { color: var(--primary); font-size: 1rem; margin-top: 0.2rem; flex-shrink: 0; }
        @media (max-width: 768px) {
            .feature-row, .feature-row.reverse { flex-direction: column; }
            .feature-col h3 { font-size: 1.3rem; }
        }

        /* ===== FAQ ===== */
        .faq-list { max-width: 800px; margin: 0 auto; }
        .faq-item { border-bottom: 1px solid var(--border); padding: 1.2rem 0; }
        .faq-question { display: flex; justify-content: space-between; align-items: center; cursor: pointer; font-weight: 500; font-size: 1.02rem; color: var(--text-main); background: none; border: none; width: 100%; text-align: left; padding: 0.2rem 0; font-family: inherit; transition: color var(--transition); }
        .faq-question:hover { color: var(--primary); }
        .faq-question i { font-size: 1rem; transition: transform var(--transition); color: var(--text-light); }
        .faq-item.active .faq-question i { transform: rotate(180deg); }
        .faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.35s ease, padding 0.3s ease; padding: 0 0.5rem 0 0; }
        .faq-item.active .faq-answer { max-height: 300px; padding-top: 0.75rem; }
        .faq-answer p { font-size: 0.92rem; color: var(--text-secondary); margin: 0; line-height: 1.7; }

        /* ===== CTA ===== */
        .cta-section { background: var(--bg-dark); color: var(--text-white); text-align: center; padding: var(--space-xl) 0; }
        .cta-section h2 { font-size: 2rem; color: var(--text-white); margin-bottom: 0.75rem; }
        .cta-section p { color: rgba(255,255,255,0.70); max-width: 560px; margin: 0 auto 1.8rem; font-size: 1.05rem; }
        .cta-section .btn { margin: 0 0.4rem; }

        /* ===== Footer ===== */
        .site-footer { background: var(--bg-dark); color: rgba(255,255,255,0.70); padding: var(--space-lg) 0 var(--space-md); border-top: 1px solid rgba(255,255,255,0.06); }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: var(--space-lg); }
        .footer-brand h3 { font-size: 1.2rem; font-weight: 700; color: var(--text-white); margin-bottom: 0.75rem; }
        .footer-brand p { font-size: 0.88rem; line-height: 1.7; color: rgba(255,255,255,0.55); max-width: 320px; }
        .footer-social { display: flex; gap: 0.75rem; margin-top: 1rem; }
        .footer-social a { width: 36px; height: 36px; border-radius: 50%; background: rgba(255,255,255,0.08); display: flex; align-items: center; justify-content: center; color: rgba(255,255,255,0.60); font-size: 0.95rem; transition: all var(--transition); }
        .footer-social a:hover { background: var(--primary); color: var(--text-white); }
        .footer-col h4 { font-size: 0.95rem; font-weight: 600; color: var(--text-white); margin-bottom: 1rem; }
        .footer-col a { display: block; font-size: 0.88rem; color: rgba(255,255,255,0.55); padding: 0.3rem 0; transition: color var(--transition); }
        .footer-col a:hover { color: var(--text-white); }
        .footer-bottom { margin-top: var(--space-lg); padding-top: var(--space-md); border-top: 1px solid rgba(255,255,255,0.06); display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: var(--space-sm); font-size: 0.84rem; color: rgba(255,255,255,0.40); }
        @media (max-width: 768px) { .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--space-md); } .footer-brand { grid-column: 1 / -1; } }
        @media (max-width: 520px) { .footer-grid { grid-template-columns: 1fr; } .footer-bottom { flex-direction: column; text-align: center; } }

        /* ===== Utility ===== */
        .text-center { text-align: center; }
        .text-primary { color: var(--primary); }
        .bg-soft { background: var(--bg-soft); }
        .bg-dark { background: var(--bg-dark); color: var(--text-white); }
        .mt-1 { margin-top: var(--space-sm); }
        .mt-2 { margin-top: var(--space-md); }
        .mt-3 { margin-top: var(--space-lg); }
        .mb-1 { margin-bottom: var(--space-sm); }
        .mb-2 { margin-bottom: var(--space-md); }
        .mb-3 { margin-bottom: var(--space-lg); }
        .gap-1 { gap: var(--space-sm); }
        .gap-2 { gap: var(--space-md); }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .flex-wrap { flex-wrap: wrap; }
        .w-full { width: 100%; }

        /* ===== Responsive Adjustments ===== */
        @media (max-width: 520px) {
            .section { padding: var(--space-lg) 0; }
            .section-header h2 { font-size: 1.5rem; }
            .hero h1 { font-size: 1.7rem; }
            .hero p { font-size: 0.92rem; }
            .nav-logo { font-size: 1.05rem; }
            .btn-lg { padding: 0.8rem 1.6rem; font-size: 0.95rem; }
        }
        @media (max-width: 400px) {
            .nav-search input { min-width: 60px; }
            .hero-stats { flex-direction: column; gap: var(--space-sm); }
            .stats-item h3 { font-size: 1.8rem; }
        }

        /* ===== Foundation Overrides ===== */
        .grid-container { max-width: 1200px; padding-left: var(--space-sm); padding-right: var(--space-sm); }
        .grid-x { margin-left: calc(-1 * var(--space-sm)); margin-right: calc(-1 * var(--space-sm)); }
        .cell { padding-left: var(--space-sm); padding-right: var(--space-sm); }
        .site-header .grid-x { margin: 0; }
        .site-header .cell { padding: 0; }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #1e3a5f;
            --primary-light: #2d5a87;
            --primary-dark: #0f2a47;
            --secondary: #2d7dd2;
            --secondary-light: #4a9be8;
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --bg-light: #f8fafc;
            --bg-white: #ffffff;
            --bg-dark: #0f1724;
            --text-primary: #1e293b;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
            --text-white: #f1f5f9;
            --border: #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: all 0.25s ease;
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --max-width: 1200px;
            --header-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);
            color: var(--text-primary);
            background: var(--bg-light);
            line-height: 1.7;
            font-size: 16px;
        }
        a { color: var(--secondary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-light); }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea { font-family: inherit; font-size: inherit; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; color: var(--text-primary); font-weight: 700; }
        .container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; width: 100%; }

        /* ===== Header & Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(14px) saturate(180%);
            -webkit-backdrop-filter: blur(14px) saturate(180%);
            border-bottom: 1px solid var(--border);
            transition: var(--transition);
        }
        .site-header.scrolled { background: rgba(255, 255, 255, 0.97); box-shadow: var(--shadow-sm); }
        .nav-bar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
            gap: 16px;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.02em;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .nav-logo i { color: var(--secondary); font-size: 1.5rem; }
        .nav-logo:hover { color: var(--primary); opacity: 0.85; }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            flex: 1;
            justify-content: center;
        }
        .nav-links a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            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); font-weight: 600; }
        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--secondary);
            border-radius: 4px;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-shrink: 0;
        }
        .nav-search {
            position: relative;
            display: flex;
            align-items: center;
        }
        .nav-search input {
            width: 180px;
            padding: 8px 16px 8px 38px;
            border: 1px solid var(--border);
            border-radius: 100px;
            background: var(--bg-light);
            font-size: 0.9rem;
            color: var(--text-primary);
            outline: none;
            transition: var(--transition);
        }
        .nav-search input:focus { border-color: var(--secondary); box-shadow: 0 0 0 3px rgba(45, 125, 210, 0.12); width: 220px; }
        .nav-search i { position: absolute; left: 12px; color: var(--text-muted); font-size: 0.9rem; pointer-events: none; }
        .nav-toggle { display: none; background: none; border: none; font-size: 1.5rem; color: var(--primary); cursor: pointer; padding: 6px 8px; border-radius: var(--radius-sm); }
        .nav-toggle:hover { background: rgba(30, 58, 95, 0.06); }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 26px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.95rem;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
            white-space: nowrap;
        }
        .btn-primary { background: var(--secondary); color: #fff; }
        .btn-primary:hover { background: var(--primary-light); color: #fff; transform: translateY(-1px); box-shadow: var(--shadow-md); }
        .btn-outline { background: transparent; color: var(--primary); border: 2px solid var(--primary); }
        .btn-outline:hover { background: var(--primary); color: #fff; transform: translateY(-1px); }
        .btn-accent { background: var(--accent); color: #1e293b; }
        .btn-accent:hover { background: var(--accent-light); color: #1e293b; transform: translateY(-1px); box-shadow: var(--shadow-md); }
        .btn-sm { padding: 8px 18px; font-size: 0.85rem; }
        .btn-lg { padding: 14px 36px; font-size: 1.05rem; border-radius: var(--radius-md); }

        /* ===== Article Hero ===== */
        .article-hero {
            position: relative;
            padding: calc(var(--header-height) + 60px) 0 60px;
            background: var(--primary-dark) url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            min-height: 360px;
            display: flex;
            align-items: center;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 42, 71, 0.88) 0%, rgba(30, 58, 95, 0.72) 100%);
            z-index: 0;
        }
        .article-hero .container { position: relative; z-index: 1; }
        .article-hero .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .article-hero .breadcrumb a { color: rgba(255, 255, 255, 0.8); }
        .article-hero .breadcrumb a:hover { color: #fff; }
        .article-hero .breadcrumb span { color: rgba(255, 255, 255, 0.5); }
        .article-hero h1 {
            font-size: 2.6rem;
            color: #fff;
            max-width: 860px;
            line-height: 1.25;
            margin-bottom: 20px;
            font-weight: 800;
        }
        .article-meta {
            display: flex;
            align-items: center;
            gap: 24px;
            flex-wrap: wrap;
            color: rgba(255, 255, 255, 0.85);
            font-size: 0.95rem;
        }
        .article-meta i { margin-right: 6px; opacity: 0.7; }
        .article-meta .category-tag {
            background: rgba(255, 255, 255, 0.15);
            padding: 4px 14px;
            border-radius: 100px;
            font-size: 0.85rem;
            color: #fff;
            backdrop-filter: blur(4px);
        }

        /* ===== Article Content ===== */
        .article-section { padding: 60px 0; }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        .article-main { min-width: 0; }
        .article-body {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 40px 44px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
        }
        .article-body .featured-image {
            width: 100%;
            border-radius: var(--radius-sm);
            margin-bottom: 32px;
            object-fit: cover;
            aspect-ratio: 16 / 9;
        }
        .article-body p { margin-bottom: 1.25rem; color: var(--text-secondary); line-height: 1.8; }
        .article-body h2 { font-size: 1.6rem; margin-top: 2rem; margin-bottom: 1rem; color: var(--primary); }
        .article-body h3 { font-size: 1.25rem; margin-top: 1.6rem; margin-bottom: 0.75rem; color: var(--text-primary); }
        .article-body ul, .article-body ol { margin-bottom: 1.25rem; padding-left: 1.5rem; color: var(--text-secondary); }
        .article-body li { margin-bottom: 0.5rem; list-style: disc; }
        .article-body blockquote {
            border-left: 4px solid var(--secondary);
            padding: 16px 20px;
            margin: 1.5rem 0;
            background: var(--bg-light);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-body img { border-radius: var(--radius-sm); margin: 1.5rem 0; }
        .article-body a { color: var(--secondary); text-decoration: underline; text-underline-offset: 2px; }
        .article-body a:hover { color: var(--primary-light); }

        .article-sidebar { min-width: 0; }
        .sidebar-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            margin-bottom: 24px;
        }
        .sidebar-card h4 { font-size: 1.1rem; margin-bottom: 16px; color: var(--primary); border-bottom: 2px solid var(--border-light); padding-bottom: 10px; }
        .sidebar-card ul li { margin-bottom: 10px; }
        .sidebar-card ul li a { color: var(--text-secondary); font-size: 0.95rem; display: flex; align-items: center; gap: 8px; }
        .sidebar-card ul li a:hover { color: var(--secondary); padding-left: 4px; }
        .sidebar-card ul li a i { color: var(--secondary); font-size: 0.75rem; }

        /* ===== Article Tags & Share ===== */
        .article-footer-bar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            margin-top: 32px;
            padding-top: 24px;
            border-top: 1px solid var(--border);
        }
        .article-tags { display: flex; gap: 8px; flex-wrap: wrap; }
        .article-tags span {
            background: var(--bg-light);
            padding: 4px 14px;
            border-radius: 100px;
            font-size: 0.85rem;
            color: var(--text-secondary);
            border: 1px solid var(--border);
        }
        .article-share { display: flex; align-items: center; gap: 12px; }
        .article-share a {
            width: 36px; height: 36px;
            display: flex; align-items: center; justify-content: center;
            border-radius: 50%;
            background: var(--bg-light);
            color: var(--text-secondary);
            border: 1px solid var(--border);
            transition: var(--transition);
            font-size: 0.95rem;
        }
        .article-share a:hover { background: var(--secondary); color: #fff; border-color: var(--secondary); }

        /* ===== Related Articles ===== */
        .related-section { background: var(--bg-white); border-top: 1px solid var(--border); }
        .related-section h2 { font-size: 1.8rem; margin-bottom: 12px; color: var(--primary); }
        .related-section .section-desc { color: var(--text-secondary); margin-bottom: 36px; font-size: 1.05rem; }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg-light);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
        .related-card img { width: 100%; height: 180px; object-fit: cover; }
        .related-card-body { padding: 20px 22px; }
        .related-card-body h3 { font-size: 1.1rem; margin-bottom: 8px; }
        .related-card-body h3 a { color: var(--text-primary); }
        .related-card-body h3 a:hover { color: var(--secondary); }
        .related-card-body p { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.6; margin-bottom: 0; }
        .related-card-body .meta { font-size: 0.8rem; color: var(--text-muted); margin-top: 10px; }

        /* ===== CTA ===== */
        .cta-section {
            padding: 72px 0;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
            text-align: center;
        }
        .cta-section h2 { font-size: 2rem; color: #fff; margin-bottom: 12px; }
        .cta-section p { color: rgba(255, 255, 255, 0.8); font-size: 1.1rem; max-width: 600px; margin: 0 auto 32px; }
        .cta-section .btn-group { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }

        /* ===== 内容未找到 ===== */
        .not-found-box {
            text-align: center;
            padding: 80px 24px;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
        }
        .not-found-box i { font-size: 4rem; color: var(--text-muted); margin-bottom: 20px; display: block; }
        .not-found-box h2 { font-size: 1.6rem; margin-bottom: 12px; }
        .not-found-box p { color: var(--text-secondary); margin-bottom: 24px; }
        .not-found-box a { font-weight: 600; }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand h3 { font-size: 1.4rem; color: #fff; margin-bottom: 14px; display: flex; align-items: center; }
        .footer-brand h3 i { color: var(--secondary); }
        .footer-brand p { font-size: 0.9rem; line-height: 1.7; color: rgba(255, 255, 255, 0.6); max-width: 340px; }
        .footer-social { display: flex; gap: 12px; margin-top: 18px; }
        .footer-social a {
            width: 38px; height: 38px;
            display: flex; align-items: center; justify-content: center;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            color: rgba(255, 255, 255, 0.7);
            transition: var(--transition);
            font-size: 1.1rem;
        }
        .footer-social a:hover { background: var(--secondary); color: #fff; }
        .footer-col h4 { font-size: 1rem; color: #fff; margin-bottom: 16px; font-weight: 600; }
        .footer-col a { display: block; font-size: 0.9rem; color: rgba(255, 255, 255, 0.55); margin-bottom: 10px; transition: var(--transition); }
        .footer-col a:hover { color: var(--secondary); padding-left: 4px; }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            padding: 20px 0;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.4);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-layout { grid-template-columns: 1fr; }
            .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
        }
        @media (max-width: 820px) {
            .nav-links { display: none; }
            .nav-links.open { display: flex; flex-direction: column; position: absolute; top: var(--header-height); left: 0; right: 0; background: rgba(255,255,255,0.98); backdrop-filter: blur(14px); border-bottom: 1px solid var(--border); padding: 16px 24px; gap: 4px; box-shadow: var(--shadow-lg); }
            .nav-links.open a { padding: 12px 16px; width: 100%; border-radius: var(--radius-sm); }
            .nav-links.open a.active::after { display: none; }
            .nav-actions .nav-search { display: none; }
            .nav-toggle { display: block; }
            .article-hero h1 { font-size: 1.8rem; }
            .article-body { padding: 24px 20px; }
            .related-grid { grid-template-columns: 1fr 1fr; }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
        }
        @media (max-width: 640px) {
            .article-hero { padding: calc(var(--header-height) + 40px) 0 40px; min-height: auto; }
            .article-hero h1 { font-size: 1.5rem; }
            .article-meta { gap: 12px; font-size: 0.85rem; }
            .article-body { padding: 20px 16px; }
            .article-section { padding: 40px 0; }
            .related-grid { grid-template-columns: 1fr; }
            .article-sidebar { 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: 1.5rem; }
            .cta-section p { font-size: 1rem; }
            .nav-search input { width: 140px; }
            .nav-search input:focus { width: 160px; }
        }
        @media (max-width: 480px) {
            .nav-logo { font-size: 1.1rem; }
            .nav-logo i { font-size: 1.2rem; }
            .btn-sm { padding: 6px 14px; font-size: 0.8rem; }
            .article-hero h1 { font-size: 1.3rem; }
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --color-primary: #1a56db;
            --color-primary-dark: #1243af;
            --color-primary-light: #e8effd;
            --color-secondary: #0ea5e9;
            --color-accent: #f59e0b;
            --color-bg: #ffffff;
            --color-bg-alt: #f4f7fc;
            --color-bg-dark: #0b1a33;
            --color-text: #1e293b;
            --color-text-light: #64748b;
            --color-text-inverse: #ffffff;
            --color-border: #e2e8f0;
            --color-border-light: #f1f5f9;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.10);
            --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.12);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --space-xs: 0.5rem;
            --space-sm: 1rem;
            --space-md: 2rem;
            --space-lg: 4rem;
            --space-xl: 6rem;
            --max-width: 1200px;
        }

        /* ===== 基础 Reset ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            color: var(--color-text);
            background: var(--color-bg);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--color-primary-dark);
        }
        a:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        button:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 2px;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--color-text);
        }

        /* ===== 容器 ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--space-sm);
            width: 100%;
        }
        @media (min-width: 768px) {
            .container {
                padding: 0 var(--space-md);
            }
        }
        @media (min-width: 1024px) {
            .container {
                padding: 0 var(--space-md);
            }
        }

        /* ===== 导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--color-border);
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition);
        }
        .site-header:hover {
            box-shadow: var(--shadow-md);
        }
        .nav-bar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: var(--space-sm);
            flex-wrap: nowrap;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 0.45rem;
            font-size: 1.2rem;
            font-weight: 800;
            color: var(--color-primary);
            letter-spacing: -0.02em;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .nav-logo i {
            font-size: 1.4rem;
            color: var(--color-secondary);
        }
        .nav-logo:hover {
            color: var(--color-primary-dark);
        }
        .nav-toggle {
            display: none;
            font-size: 1.4rem;
            color: var(--color-text);
            padding: 0.3rem 0.5rem;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
            flex-shrink: 0;
        }
        .nav-toggle:hover {
            background: var(--color-bg-alt);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 0.25rem;
            flex: 1 1 auto;
            justify-content: center;
        }
        .nav-links a {
            padding: 0.5rem 1rem;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--color-text-light);
            border-radius: var(--radius-sm);
            transition: color var(--transition), background var(--transition);
            white-space: nowrap;
        }
        .nav-links a:hover {
            color: var(--color-primary);
            background: var(--color-primary-light);
        }
        .nav-links a.active {
            color: var(--color-primary);
            background: var(--color-primary-light);
            font-weight: 600;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: var(--space-sm);
            flex-shrink: 0;
        }
        .nav-search {
            position: relative;
            display: flex;
            align-items: center;
            background: var(--color-bg-alt);
            border-radius: 40px;
            padding: 0 0.9rem;
            border: 1px solid var(--color-border);
            transition: border-color var(--transition), box-shadow var(--transition);
            min-width: 160px;
        }
        .nav-search:focus-within {
            border-color: var(--color-primary);
            box-shadow: 0 0 0 3px rgba(26, 86, 219, 0.12);
        }
        .nav-search input {
            border: none;
            background: transparent;
            padding: 0.5rem 0.5rem 0.5rem 0;
            font-size: 0.85rem;
            color: var(--color-text);
            width: 100%;
            outline: none;
        }
        .nav-search input::placeholder {
            color: var(--color-text-light);
        }
        .nav-search i {
            color: var(--color-text-light);
            font-size: 0.9rem;
            pointer-events: none;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.4rem;
            font-weight: 600;
            font-size: 0.92rem;
            padding: 0.6rem 1.4rem;
            border-radius: 40px;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            border: none;
            cursor: pointer;
            white-space: nowrap;
            text-align: center;
        }
        .btn:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 2px;
        }
        .btn-primary {
            background: var(--color-primary);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--color-primary-dark);
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
            color: #fff;
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: var(--shadow-sm);
        }
        .btn-secondary {
            background: var(--color-bg);
            color: var(--color-primary);
            border: 1.5px solid var(--color-primary);
        }
        .btn-secondary:hover {
            background: var(--color-primary-light);
            transform: translateY(-1px);
            color: var(--color-primary-dark);
        }
        .btn-secondary:active {
            transform: translateY(0);
        }
        .btn-sm {
            padding: 0.45rem 1.1rem;
            font-size: 0.85rem;
        }
        .btn-lg {
            padding: 0.85rem 2.2rem;
            font-size: 1.05rem;
        }

        /* ===== 导航响应式 ===== */
        @media (max-width: 900px) {
            .nav-bar {
                flex-wrap: wrap;
                height: auto;
                padding: 0.6rem 0;
            }
            .nav-toggle {
                display: block;
                order: 3;
            }
            .nav-links {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                gap: 0;
                padding: 0.6rem 0 0.8rem;
                order: 4;
                background: var(--color-bg);
                border-top: 1px solid var(--color-border);
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links a {
                padding: 0.7rem 1rem;
                border-radius: var(--radius-sm);
                text-align: center;
            }
            .nav-actions {
                order: 2;
                margin-left: auto;
                gap: 0.6rem;
            }
            .nav-search {
                min-width: 120px;
            }
            .nav-search input {
                width: 80px;
            }
            .nav-logo {
                font-size: 1.05rem;
                order: 1;
            }
        }
        @media (max-width: 520px) {
            .nav-search {
                min-width: 0;
                padding: 0 0.6rem;
            }
            .nav-search input {
                width: 60px;
                font-size: 0.78rem;
            }
            .nav-actions .btn-sm {
                padding: 0.35rem 0.8rem;
                font-size: 0.78rem;
            }
            .nav-logo {
                font-size: 0.95rem;
            }
            .nav-logo i {
                font-size: 1.1rem;
            }
        }

        /* ===== Hero 板块 ===== */
        .hero-section {
            position: relative;
            padding: var(--space-xl) 0 var(--space-lg);
            background: var(--color-bg-dark);
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center center;
            background-repeat: no-repeat;
            color: var(--color-text-inverse);
            overflow: hidden;
            min-height: 480px;
            display: flex;
            align-items: center;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 26, 51, 0.88) 0%, rgba(11, 26, 51, 0.60) 100%);
            z-index: 1;
        }
        .hero-section .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .hero-badge {
            display: inline-block;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(4px);
            padding: 0.3rem 1.2rem;
            border-radius: 40px;
            font-size: 0.82rem;
            font-weight: 500;
            letter-spacing: 0.02em;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: var(--space-sm);
            border: 1px solid rgba(255, 255, 255, 0.15);
        }
        .hero-section h1 {
            font-size: clamp(2.2rem, 5vw, 3.6rem);
            font-weight: 800;
            color: #fff;
            margin-bottom: var(--space-sm);
            letter-spacing: -0.02em;
            line-height: 1.2;
        }
        .hero-section h1 span {
            color: var(--color-secondary);
        }
        .hero-sub {
            font-size: clamp(1rem, 2vw, 1.25rem);
            color: rgba(255, 255, 255, 0.8);
            max-width: 700px;
            margin: 0 auto var(--space-md);
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: var(--space-sm);
            justify-content: center;
        }
        .hero-actions .btn-primary {
            background: var(--color-secondary);
            color: #fff;
        }
        .hero-actions .btn-primary:hover {
            background: #0284c7;
        }
        .hero-actions .btn-secondary {
            background: rgba(255, 255, 255, 0.10);
            color: #fff;
            border-color: rgba(255, 255, 255, 0.35);
        }
        .hero-actions .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.20);
            color: #fff;
            border-color: rgba(255, 255, 255, 0.5);
        }
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: var(--space-md);
            justify-content: center;
            margin-top: var(--space-lg);
        }
        .hero-stat {
            text-align: center;
            padding: 0 var(--space-sm);
        }
        .hero-stat-num {
            font-size: 1.8rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.1;
        }
        .hero-stat-label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.65);
            margin-top: 0.2rem;
        }
        .hero-stat+.hero-stat {
            border-left: 1px solid rgba(255, 255, 255, 0.15);
        }
        @media (max-width: 640px) {
            .hero-section {
                padding: var(--space-lg) 0 var(--space-md);
                min-height: 360px;
            }
            .hero-stat-num {
                font-size: 1.4rem;
            }
            .hero-stats {
                gap: var(--space-sm);
                margin-top: var(--space-md);
            }
            .hero-stat {
                padding: 0 0.6rem;
            }
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: var(--space-xl) 0;
        }
        .section-alt {
            background: var(--color-bg-alt);
        }
        .section-dark {
            background: var(--color-bg-dark);
            color: var(--color-text-inverse);
        }
        .section-header {
            text-align: center;
            margin-bottom: var(--space-lg);
        }
        .section-header h2 {
            font-size: clamp(1.6rem, 3.5vw, 2.4rem);
            font-weight: 800;
            letter-spacing: -0.01em;
            margin-bottom: 0.75rem;
        }
        .section-header p {
            max-width: 620px;
            margin: 0 auto;
            color: var(--color-text-light);
            font-size: 1.05rem;
            line-height: 1.7;
        }
        .section-dark .section-header h2 {
            color: #fff;
        }
        .section-dark .section-header p {
            color: rgba(255, 255, 255, 0.7);
        }
        .section-tag {
            display: inline-block;
            background: var(--color-primary-light);
            color: var(--color-primary);
            font-size: 0.8rem;
            font-weight: 600;
            padding: 0.25rem 1rem;
            border-radius: 40px;
            margin-bottom: 0.75rem;
            letter-spacing: 0.02em;
        }
        .section-dark .section-tag {
            background: rgba(255, 255, 255, 0.12);
            color: rgba(255, 255, 255, 0.85);
        }

        /* ===== 卡片网格 ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: var(--space-md);
        }
        .card-grid-3 {
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
        }
        .card-grid-4 {
            grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
        }
        .card {
            background: var(--color-bg);
            border-radius: var(--radius-md);
            padding: var(--space-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .card-icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-sm);
            background: var(--color-primary-light);
            color: var(--color-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            margin-bottom: var(--space-sm);
            transition: background var(--transition), color var(--transition);
        }
        .card:hover .card-icon {
            background: var(--color-primary);
            color: #fff;
        }
        .card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }
        .card p {
            font-size: 0.92rem;
            color: var(--color-text-light);
            line-height: 1.7;
        }
        .card-img {
            border-radius: var(--radius-sm) var(--radius-sm) 0 0;
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            margin-bottom: var(--space-sm);
        }
        .card-tag {
            display: inline-block;
            background: var(--color-primary-light);
            color: var(--color-primary);
            font-size: 0.75rem;
            font-weight: 600;
            padding: 0.15rem 0.7rem;
            border-radius: 40px;
            margin-bottom: 0.5rem;
        }
        .card-row {
            display: flex;
            flex-wrap: wrap;
            gap: var(--space-md);
            align-items: center;
        }
        .card-row .card-img-wrap {
            flex: 1 1 45%;
            min-width: 280px;
        }
        .card-row .card-body {
            flex: 1 1 45%;
            min-width: 280px;
        }
        .card-row .card-body h3 {
            font-size: 1.4rem;
            margin-bottom: 0.6rem;
        }
        .card-row .card-body p {
            font-size: 0.95rem;
            color: var(--color-text-light);
            line-height: 1.7;
        }

        /* ===== 场景卡片 ===== */
        .scene-card {
            background: var(--color-bg);
            border-radius: var(--radius-md);
            padding: var(--space-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border);
            transition: transform var(--transition), box-shadow var(--transition);
            text-align: center;
        }
        .scene-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .scene-card .scene-icon {
            font-size: 2.2rem;
            color: var(--color-primary);
            margin-bottom: var(--space-sm);
            transition: transform var(--transition);
        }
        .scene-card:hover .scene-icon {
            transform: scale(1.1);
        }
        .scene-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 0.4rem;
        }
        .scene-card p {
            font-size: 0.88rem;
            color: var(--color-text-light);
            line-height: 1.6;
        }

        /* ===== 流程步骤 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: var(--space-md);
            counter-reset: step;
        }
        .step-card {
            text-align: center;
            padding: var(--space-md) var(--space-sm);
            position: relative;
            background: var(--color-bg);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .step-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }
        .step-number {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--color-primary);
            color: #fff;
            font-weight: 800;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto var(--space-sm);
            transition: background var(--transition), transform var(--transition);
        }
        .step-card:hover .step-number {
            background: var(--color-secondary);
            transform: scale(1.05);
        }
        .step-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 0.4rem;
        }
        .step-card p {
            font-size: 0.88rem;
            color: var(--color-text-light);
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: var(--space-sm);
        }
        .faq-item {
            background: var(--color-bg);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: var(--space-sm) var(--space-md);
            transition: box-shadow var(--transition), border-color var(--transition);
            cursor: pointer;
        }
        .faq-item:hover {
            border-color: var(--color-primary);
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            font-size: 1rem;
            color: var(--color-text);
            padding: 0.4rem 0;
            gap: var(--space-sm);
        }
        .faq-question i {
            color: var(--color-primary);
            font-size: 1.1rem;
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 0;
            color: var(--color-text-light);
            font-size: 0.92rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 0.6rem 0 var::0.6rem;
        }
        .faq-answer-inner {
            padding-bottom: 0.8rem;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--color-bg-dark);
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            padding: var(--space-xl) 0;
            text-align: center;
            position: relative;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 26, 51, 0.85) 0%, rgba(11, 26, 51, 0.65) 100%);
            z-index: 1;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: clamp(1.6rem, 3vw, 2.4rem);
            color: #fff;
            font-weight: 800;
            margin-bottom: 0.75rem;
            letter-spacing: -0.01em;
        }
        .cta-section p {
            max-width: 580px;
            margin: 0 auto var(--space-md);
            color: rgba(255, 255, 255, 0.75);
            font-size: 1.05rem;
            line-height: 1.7;
        }
        .cta-section .btn-primary {
            background: var(--color-accent);
            color: #1e293b;
            font-weight: 700;
        }
        .cta-section .btn-primary:hover {
            background: #d97706;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(245, 158, 11, 0.35);
        }
        .cta-section .btn-secondary {
            background: rgba(255, 255, 255, 0.10);
            color: #fff;
            border-color: rgba(255, 255, 255, 0.3);
        }
        .cta-section .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.20);
            color: #fff;
            border-color: rgba(255, 255, 255, 0.5);
        }
        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: var(--space-sm);
            justify-content: center;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #0b1a33;
            color: rgba(255, 255, 255, 0.75);
            padding: var(--space-lg) 0 var(--space-md);
            font-size: 0.9rem;
        }
        .site-footer a {
            color: rgba(255, 255, 255, 0.65);
            transition: color var(--transition);
        }
        .site-footer a:hover {
            color: #fff;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: var(--space-md) var(--space-lg);
            margin-bottom: var(--space-md);
        }
        .footer-brand h3 {
            font-size: 1.2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 0.6rem;
            display: flex;
            align-items: center;
        }
        .footer-brand h3 i {
            color: var(--color-secondary);
        }
        .footer-brand p {
            font-size: 0.88rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.55);
            margin-bottom: var(--space-sm);
        }
        .footer-social {
            display: flex;
            gap: var(--space-sm);
        }
        .footer-social a {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.6);
            transition: background var(--transition), color var(--transition), transform var(--transition);
        }
        .footer-social a:hover {
            background: var(--color-primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.8rem;
        }
        .footer-col a {
            display: block;
            padding: 0.3rem 0;
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.55);
        }
        .footer-col a:hover {
            color: #fff;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: var(--space-sm);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: var(--space-sm);
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-bottom span {
            display: inline-block;
        }
        @media (max-width: 640px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: var(--space-md);
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== 通用响应式微调 ===== */
        @media (max-width: 768px) {
            .section {
                padding: var(--space-lg) 0;
            }
            .card-grid {
                grid-template-columns: 1fr 1fr;
            }
            .card-grid-3,
            .card-grid-4 {
                grid-template-columns: 1fr 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 520px) {
            .card-grid,
            .card-grid-3,
            .card-grid-4 {
                grid-template-columns: 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .hero-actions .btn {
                width: 100%;
                max-width: 280px;
            }
            .cta-actions {
                flex-direction: column;
                align-items: center;
            }
            .cta-actions .btn {
                width: 100%;
                max-width: 280px;
            }
            .card-row {
                flex-direction: column;
            }
            .card-row .card-img-wrap,
            .card-row .card-body {
                flex: 1 1 100%;
                min-width: 0;
            }
        }

        /* ===== 工具类 ===== */
        .text-center {
            text-align: center;
        }
        .mt-sm {
            margin-top: var(--space-sm);
        }
        .mt-md {
            margin-top: var(--space-md);
        }
        .mt-lg {
            margin-top: var(--space-lg);
        }
        .mb-sm {
            margin-bottom: var(--space-sm);
        }
        .mb-md {
            margin-bottom: var(--space-md);
        }
        .gap-sm {
            gap: var(--space-sm);
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .flex-wrap {
            flex-wrap: wrap;
        }

        /* ===== 特色装饰 ===== */
        .divider {
            width: 60px;
            height: 4px;
            background: var(--color-primary);
            border-radius: 4px;
            margin: 0.6rem auto 1rem;
        }
        .section-dark .divider {
            background: var(--color-secondary);
        }

        /* ===== Foundation 覆盖 ===== */
        .grid-container {
            max-width: var(--max-width);
            padding-left: var(--space-sm);
            padding-right: var(--space-sm);
        }
        @media (min-width: 768px) {
            .grid-container {
                padding-left: var(--space-md);
                padding-right: var(--space-md);
            }
        }
        /* ===== 图片卡片 ===== */
        .img-card {
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            background: var(--color-bg);
            border: 1px solid var(--color-border);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .img-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .img-card img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            display: block;
        }
        .img-card-body {
            padding: var(--space-sm) var(--space-md) var(--space-md);
        }
        .img-card-body h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 0.3rem;
        }
        .img-card-body p {
            font-size: 0.88rem;
            color: var(--color-text-light);
            line-height: 1.6;
        }
        .img-card-body .card-tag {
            margin-bottom: 0.4rem;
        }
        /* ===== 徽章列表 ===== */
        .badge-list {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin-top: var(--space-sm);
        }
        .badge {
            display: inline-flex;
            align-items: center;
            background: var(--color-bg-alt);
            color: var(--color-text);
            padding: 0.25rem 0.8rem;
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 500;
            border: 1px solid var(--color-border);
            transition: background var(--transition), border-color var(--transition);
        }
        .badge i {
            margin-right: 0.3rem;
            font-size: 0.75rem;
            color: var(--color-primary);
        }
        .badge:hover {
            background: var(--color-primary-light);
            border-color: var(--color-primary);
        }
        .badge-primary {
            background: var(--color-primary-light);
            color: var(--color-primary);
            border-color: var(--color-primary);
        }