/* roulang page: index */
:root {
            --brand-600: #1d4ed8;
            --brand-700: #1e40af;
            --accent-500: #f97316;
            --accent-600: #ea580c;
            --surface: #f8fafc;
            --card: #ffffff;
            --muted: #64748b;
            --border: #e2e8f0;
            --text: #1e293b;
            --radius-xl: 12px;
            --radius-2xl: 16px;
            --radius-3xl: 24px;
            --shadow-card: 0 1px 3px rgba(0,0,0,0.06), 0 4px 16px rgba(0,0,0,0.04);
            --shadow-card-hover: 0 4px 12px rgba(0,0,0,0.08), 0 8px 32px rgba(0,0,0,0.06);
            --transition-base: 0.25s ease;
        }
        *,*::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:'Inter','PingFang SC','Microsoft YaHei','Helvetica Neue',sans-serif;line-height:1.7;color:var(--text);background:var(--surface);overflow-x:hidden}
        a{text-decoration:none;color:inherit;transition:color var(--transition-base)}
        img{max-width:100%;height:auto;display:block}
        button{cursor:pointer;font-family:inherit;border:none;outline:none}
        input{font-family:inherit;outline:none}
        .container{max-width:1200px;margin:0 auto;padding:0 24px}
        @media(max-width:1024px){.container{padding:0 20px}}
        @media(max-width:768px){.container{padding:0 16px}}

        /* Header & Navigation */
        .site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,0.92);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid var(--border);box-shadow:0 1px 3px rgba(0,0,0,0.05);transition:all var(--transition-base)}
        .header-inner{display:flex;align-items:center;justify-content:space-between;height:64px;gap:24px}
        .logo-link{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.25rem;color:var(--brand-700);white-space:nowrap;letter-spacing:-0.01em;flex-shrink:0}
        .logo-link i{font-size:1.5rem;color:var(--accent-500)}
        .nav-links{display:flex;align-items:center;gap:6px;list-style:none}
        .nav-links a{display:inline-flex;align-items:center;padding:8px 16px;border-radius:8px;font-size:0.925rem;font-weight:500;color:var(--muted);transition:all var(--transition-base);white-space:nowrap}
        .nav-links a:hover{color:var(--brand-600);background:rgba(29,78,216,0.05)}
        .nav-links a.active{color:var(--brand-600);background:rgba(29,78,216,0.08);font-weight:600}
        .search-box{display:flex;align-items:center;gap:8px;background:#f1f5f9;border-radius:10px;padding:8px 16px;transition:all var(--transition-base);border:1.5px solid transparent;flex-shrink:0;min-width:200px}
        .search-box:focus-within{border-color:var(--brand-600);background:#fff;box-shadow:0 0 0 4px rgba(29,78,216,0.08)}
        .search-box input{background:transparent;border:none;font-size:0.875rem;color:var(--text);width:100%;min-width:130px}
        .search-box input::placeholder{color:#94a3b8}
        .search-box i{color:#94a3b8;font-size:0.95rem}
        .header-cta{display:inline-flex;align-items:center;gap:8px;padding:10px 20px;background:var(--accent-500);color:#fff;border-radius:10px;font-weight:600;font-size:0.9rem;white-space:nowrap;transition:all var(--transition-base);box-shadow:0 2px 8px rgba(249,115,22,0.25)}
        .header-cta:hover{background:var(--accent-600);transform:translateY(-1px);box-shadow:0 4px 16px rgba(249,115,22,0.35)}
        .mobile-toggle{display:none;background:none;font-size:1.5rem;color:var(--text);padding:8px;border-radius:8px}
        .mobile-menu{display:none;position:fixed;top:64px;left:0;right:0;bottom:0;background:#fff;z-index:99;padding:20px;flex-direction:column;gap:12px;overflow-y:auto}
        .mobile-menu.open{display:flex}
        .mobile-menu a{display:block;padding:14px 18px;border-radius:10px;font-size:1rem;font-weight:500;color:var(--text);background:#f8fafc;transition:all var(--transition-base)}
        .mobile-menu a:hover,.mobile-menu a.active{background:rgba(29,78,216,0.08);color:var(--brand-600)}
        @media(max-width:1024px){
            .nav-links{display:none}
            .search-box{display:none}
            .header-cta{display:none}
            .mobile-toggle{display:block}
        }
        @media(min-width:1025px){
            .mobile-menu,.mobile-menu.open{display:none!important}
        }

        /* Hero Section */
        .hero{position:relative;padding:100px 0 90px;overflow:hidden;background:linear-gradient(135deg,#0f172a 0%,#1e3a8a 40%,#1d4ed8 70%,#0f172a 100%)}
        .hero-bg{position:absolute;inset:0;background-image:url('/assets/images/backpic/back-1.png');background-size:cover;background-position:center;opacity:0.35;mix-blend-mode:overlay}
        .hero::after{content:'';position:absolute;inset:0;background:radial-gradient(ellipse at 30% 50%,rgba(29,78,216,0.35) 0%,transparent 60%),radial-gradient(ellipse at 70% 30%,rgba(249,115,22,0.2) 0%,transparent 50%)}
        .hero .container{position:relative;z-index:2}
        .hero-content{max-width:680px}
        .hero-badge{display:inline-flex;align-items:center;gap:6px;padding:6px 14px;background:rgba(255,255,255,0.12);border:1px solid rgba(255,255,255,0.2);border-radius:20px;color:#e2e8f0;font-size:0.85rem;font-weight:500;margin-bottom:24px;backdrop-filter:blur(4px)}
        .hero-badge i{color:var(--accent-500);font-size:0.75rem}
        .hero h1{font-size:3rem;font-weight:800;color:#fff;line-height:1.2;margin-bottom:20px;letter-spacing:-0.02em}
        .hero h1 span{color:var(--accent-500)}
        .hero-desc{font-size:1.15rem;color:#cbd5e1;line-height:1.8;margin-bottom:36px;max-width:560px}
        .hero-btns{display:flex;flex-wrap:wrap;gap:14px}
        .btn-primary{display:inline-flex;align-items:center;gap:8px;padding:14px 28px;background:var(--accent-500);color:#fff;border-radius:12px;font-weight:600;font-size:1rem;transition:all var(--transition-base);box-shadow:0 4px 16px rgba(249,115,22,0.3)}
        .btn-primary:hover{background:var(--accent-600);transform:translateY(-2px);box-shadow:0 8px 28px rgba(249,115,22,0.4)}
        .btn-outline{display:inline-flex;align-items:center;gap:8px;padding:14px 28px;background:rgba(255,255,255,0.1);color:#fff;border:1.5px solid rgba(255,255,255,0.3);border-radius:12px;font-weight:600;font-size:1rem;transition:all var(--transition-base);backdrop-filter:blur(4px)}
        .btn-outline:hover{background:rgba(255,255,255,0.18);border-color:rgba(255,255,255,0.5);transform:translateY(-2px)}
        .hero-stats{display:flex;gap:40px;margin-top:48px;flex-wrap:wrap}
        .hero-stat{text-align:left}
        .hero-stat .stat-num{font-size:2rem;font-weight:800;color:#fff;line-height:1}
        .hero-stat .stat-label{font-size:0.85rem;color:#94a3b8;margin-top:6px}
        @media(max-width:768px){
            .hero{padding:60px 0 50px}
            .hero h1{font-size:2rem}
            .hero-desc{font-size:1rem}
            .hero-stats{gap:24px}
            .hero-stat .stat-num{font-size:1.5rem}
            .btn-primary,.btn-outline{padding:12px 22px;font-size:0.9rem}
        }

        /* Section General */
        .section{padding:72px 0}
        .section-header{text-align:center;margin-bottom:48px}
        .section-label{display:inline-block;font-size:0.85rem;font-weight:600;color:var(--brand-600);background:rgba(29,78,216,0.06);padding:5px 14px;border-radius:20px;margin-bottom:12px;letter-spacing:0.02em}
        .section-title{font-size:2rem;font-weight:700;color:var(--text);margin-bottom:12px;letter-spacing:-0.01em}
        .section-subtitle{font-size:1.05rem;color:var(--muted);max-width:600px;margin:0 auto}
        @media(max-width:768px){
            .section{padding:44px 0}
            .section-title{font-size:1.5rem}
            .section-header{margin-bottom:32px}
        }

        /* Cards Grid */
        .cards-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:24px}
        .card{background:var(--card);border-radius:var(--radius-2xl);padding:28px;box-shadow:var(--shadow-card);border:1px solid var(--border);transition:all var(--transition-base);display:flex;flex-direction:column;gap:14px}
        .card:hover{box-shadow:var(--shadow-card-hover);transform:translateY(-3px);border-color:#cbd5e1}
        .card-icon{width:48px;height:48px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:1.35rem;flex-shrink:0}
        .card-icon.blue{background:#eff6ff;color:var(--brand-600)}
        .card-icon.orange{background:#fff7ed;color:var(--accent-500)}
        .card-icon.green{background:#f0fdf4;color:#16a34a}
        .card h3{font-size:1.1rem;font-weight:700;color:var(--text)}
        .card p{font-size:0.925rem;color:var(--muted);line-height:1.7}
        .card-img{border-radius:12px;overflow:hidden;flex-shrink:0}
        .card-img img{width:100%;height:200px;object-fit:cover;transition:transform 0.4s ease}
        .card:hover .card-img img{transform:scale(1.04)}
        @media(max-width:768px){.cards-grid{grid-template-columns:1fr}}

        /* Info List */
        .info-list{display:flex;flex-direction:column;gap:16px}
        .info-item{display:flex;align-items:flex-start;gap:16px;padding:20px 24px;background:var(--card);border-radius:var(--radius-xl);box-shadow:var(--shadow-card);border:1px solid var(--border);transition:all var(--transition-base)}
        .info-item:hover{box-shadow:var(--shadow-card-hover);border-color:#cbd5e1}
        .info-item .item-icon{width:40px;height:40px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:1.1rem;flex-shrink:0;background:#eff6ff;color:var(--brand-600)}
        .info-item .item-body{flex:1;min-width:0}
        .info-item .item-title{font-weight:600;color:var(--text);font-size:1rem;margin-bottom:4px}
        .info-item .item-meta{font-size:0.85rem;color:var(--muted)}
        .info-item .item-arrow{color:#cbd5e1;transition:color var(--transition-base);flex-shrink:0;padding-top:8px}
        .info-item:hover .item-arrow{color:var(--brand-600)}
        @media(max-width:520px){.info-item{padding:16px;gap:12px}}

        /* Steps Flow */
        .steps-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
        .step-card{text-align:center;padding:28px 20px;background:var(--card);border-radius:var(--radius-2xl);box-shadow:var(--shadow-card);border:1px solid var(--border);position:relative;transition:all var(--transition-base)}
        .step-card:hover{box-shadow:var(--shadow-card-hover);transform:translateY(-3px)}
        .step-num{width:44px;height:44px;border-radius:50%;background:var(--brand-600);color:#fff;display:inline-flex;align-items:center;justify-content:center;font-weight:700;font-size:1.15rem;margin-bottom:16px}
        .step-card h4{font-weight:700;color:var(--text);margin-bottom:6px;font-size:1rem}
        .step-card p{font-size:0.875rem;color:var(--muted);line-height:1.6}
        .step-connector{display:none}
        @media(min-width:769px){
            .steps-grid{position:relative}
            .step-connector{display:block;position:absolute;top:50px;left:0;right:0;height:2px;background:var(--border);z-index:0}
            .step-card{position:relative;z-index:1}
        }
        @media(max-width:768px){.steps-grid{grid-template-columns:repeat(2,1fr)}}
        @media(max-width:520px){.steps-grid{grid-template-columns:1fr}}

        /* FAQ */
        .faq-list{max-width:800px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
        .faq-item{background:var(--card);border-radius:var(--radius-xl);border:1px solid var(--border);overflow:hidden;transition:all var(--transition-base)}
        .faq-item:hover{border-color:#cbd5e1}
        .faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;padding:18px 24px;background:none;font-weight:600;font-size:1rem;color:var(--text);text-align:left;gap:16px}
        .faq-q i{transition:transform var(--transition-base);color:var(--muted)}
        .faq-a{padding:0 24px 20px;font-size:0.925rem;color:var(--muted);line-height:1.75;display:none}
        .faq-item.open .faq-a{display:block}
        .faq-item.open .faq-q i{transform:rotate(180deg)}
        .faq-item.open{border-color:var(--brand-600);box-shadow:0 0 0 3px rgba(29,78,216,0.06)}

        /* CTA Section */
        .cta-section{background:linear-gradient(135deg,#1e3a8a 0%,#1d4ed8 50%,#1e40af 100%);position:relative;overflow:hidden;border-radius:var(--radius-3xl);margin:0 24px 72px;padding:64px 48px;text-align:center}
        .cta-section::before{content:'';position:absolute;inset:0;background-image:url('/assets/images/backpic/back-2.png');background-size:cover;background-position:center;opacity:0.2;mix-blend-mode:overlay}
        .cta-section .container{position:relative;z-index:2;max-width:700px}
        .cta-section h2{font-size:2rem;font-weight:700;color:#fff;margin-bottom:12px}
        .cta-section p{font-size:1.05rem;color:#cbd5e1;margin-bottom:28px}
        .cta-section .btn-primary{font-size:1.05rem;padding:16px 36px}
        @media(max-width:768px){
            .cta-section{margin:0 12px 44px;padding:40px 24px;border-radius:var(--radius-2xl)}
            .cta-section h2{font-size:1.5rem}
        }

        /* Footer */
        .site-footer{background:#0f172a;color:#94a3b8;padding:56px 0 32px}
        .footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
        .footer-brand-name{font-weight:700;font-size:1.2rem;color:#fff;margin-bottom:10px}
        .footer-desc{font-size:0.9rem;line-height:1.7;max-width:300px}
        .footer-col h4{font-weight:600;color:#e2e8f0;font-size:0.95rem;margin-bottom:16px}
        .footer-col ul{list-style:none;display:flex;flex-direction:column;gap:10px}
        .footer-col a{font-size:0.875rem;color:#94a3b8;transition:color var(--transition-base)}
        .footer-col a:hover{color:#fff}
        .footer-bottom{border-top:1px solid rgba(255,255,255,0.1);padding-top:24px;text-align:center;font-size:0.825rem;color:#64748b}
        @media(max-width:768px){.footer-grid{grid-template-columns:1fr 1fr;gap:28px}}
        @media(max-width:520px){.footer-grid{grid-template-columns:1fr}}

        /* Misc */
        .badge-tag{display:inline-block;padding:4px 10px;border-radius:6px;font-size:0.78rem;font-weight:600}
        .badge-tag.blue{background:#eff6ff;color:var(--brand-600)}
        .badge-tag.orange{background:#fff7ed;color:var(--accent-500)}
        .text-muted{color:var(--muted)}
        .mt-sm{margin-top:8px}
        .mt-md{margin-top:16px}
        .mt-lg{margin-top:24px}

/* roulang page: article */
:root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #dbeafe;
            --primary-soft: #eff6ff;
            --accent: #0ea5e9;
            --accent-light: #e0f2fe;
            --bg: #f8fafc;
            --bg-white: #ffffff;
            --bg-card: #ffffff;
            --text: #1e293b;
            --text-strong: #0f172a;
            --text-light: #64748b;
            --text-muted: #94a3b8;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius-sm: 8px;
            --radius: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.06);
            --shadow: 0 4px 16px rgba(0,0,0,0.06), 0 1px 4px rgba(0,0,0,0.04);
            --shadow-md: 0 8px 30px rgba(0,0,0,0.08), 0 2px 8px rgba(0,0,0,0.04);
            --shadow-lg: 0 16px 48px rgba(0,0,0,0.10), 0 4px 12px rgba(0,0,0,0.05);
            --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-slow: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
            --max-width: 1200px;
            --content-width: 780px;
        }

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

        html { scroll-behavior: smooth; font-size: 16px; }

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

        a { text-decoration: none; color: inherit; transition: color var(--transition); }
        a:hover { color: var(--primary); }
        img { max-width: 100%; height: auto; display: block; }
        button { cursor: pointer; font-family: inherit; }

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

        /* ========== HEADER / NAV ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255,255,255,0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border);
            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: 64px;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        .logo-wrap {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.25rem;
            color: var(--text-strong);
            flex-shrink: 0;
            letter-spacing: -0.01em;
        }
        .logo-wrap i {
            color: var(--primary);
            font-size: 1.35rem;
        }
        .logo-wrap:hover { color: var(--primary); }

        .nav-links {
            display: flex;
            align-items: center;
            list-style: none;
            gap: 6px;
            margin: 0;
            padding: 0;
        }
        .nav-links a {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            font-size: 0.925rem;
            font-weight: 500;
            color: var(--text-light);
            transition: all var(--transition);
            white-space: nowrap;
            position: relative;
        }
        .nav-links a:hover {
            color: var(--primary);
            background: var(--primary-soft);
        }
        .nav-links a.active {
            color: var(--primary);
            background: var(--primary-soft);
            font-weight: 600;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .btn-download-sm {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 9px 18px;
            border-radius: var(--radius-sm);
            font-size: 0.875rem;
            font-weight: 600;
            background: var(--primary);
            color: #fff;
            border: none;
            transition: all var(--transition);
            white-space: nowrap;
            letter-spacing: 0.01em;
        }
        .btn-download-sm:hover {
            background: var(--primary-dark);
            color: #fff;
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }

        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text);
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }
        .mobile-toggle:hover { background: var(--border-light); }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                background: var(--bg-white);
                flex-direction: column;
                padding: 12px 16px;
                gap: 2px;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-md);
                z-index: 999;
            }
            .nav-links.show { display: flex; }
            .nav-links a {
                width: 100%;
                padding: 12px 16px;
                border-radius: var(--radius-sm);
                font-size: 1rem;
            }
            .mobile-toggle { display: block; }
            .header-actions .btn-download-sm { display: none; }
            .header-actions .btn-download-sm.mobile-visible { display: inline-flex; }
        }

        /* ========== ARTICLE BANNER ========== */
        .article-banner {
            position: relative;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            min-height: 360px;
            display: flex;
            align-items: flex-end;
            padding: 80px 0 48px;
            overflow: hidden;
        }
        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(15,23,42,0.45) 0%, rgba(15,23,42,0.75) 60%, rgba(15,23,42,0.88) 100%);
            z-index: 1;
        }
        .article-banner .container-narrow {
            position: relative;
            z-index: 2;
            width: 100%;
        }
        .banner-category {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            background: rgba(255,255,255,0.18);
            color: #e2e8f0;
            backdrop-filter: blur(6px);
            -webkit-backdrop-filter: blur(6px);
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }
        .banner-category i { font-size: 0.7rem; color: var(--accent); }
        .banner-title {
            font-size: 2rem;
            font-weight: 750;
            color: #ffffff;
            line-height: 1.35;
            margin-bottom: 16px;
            letter-spacing: -0.015em;
            text-shadow: 0 2px 12px rgba(0,0,0,0.3);
        }
        .banner-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 20px;
            color: #cbd5e1;
            font-size: 0.9rem;
        }
        .banner-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .banner-meta i { font-size: 0.85rem; color: #94a3b8; }

        @media (max-width: 768px) {
            .article-banner { min-height: 280px; padding: 60px 0 36px; }
            .banner-title { font-size: 1.5rem; }
            .banner-meta { gap: 12px; font-size: 0.82rem; }
        }

        /* ========== BREADCRUMB ========== */
        .breadcrumb-bar {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border);
            padding: 14px 0;
        }
        .breadcrumb-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.875rem;
            color: var(--text-muted);
            flex-wrap: wrap;
        }
        .breadcrumb-nav a {
            color: var(--text-light);
            transition: color var(--transition);
        }
        .breadcrumb-nav a:hover { color: var(--primary); }
        .breadcrumb-nav .separator { color: var(--border); font-size: 0.7rem; }
        .breadcrumb-nav .current { color: var(--text); font-weight: 500; }

        /* ========== ARTICLE BODY ========== */
        .article-body-section {
            padding: 48px 0 64px;
            background: var(--bg-white);
        }
        .article-content {
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--text);
        }
        .article-content h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-strong);
            margin: 40px 0 16px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--primary-soft);
            letter-spacing: -0.01em;
        }
        .article-content h3 {
            font-size: 1.2rem;
            font-weight: 650;
            color: var(--text-strong);
            margin: 32px 0 12px;
            letter-spacing: -0.005em;
        }
        .article-content p {
            margin-bottom: 18px;
            color: var(--text);
        }
        .article-content ul,
        .article-content ol {
            margin: 16px 0 20px 20px;
            padding-left: 8px;
        }
        .article-content li {
            margin-bottom: 8px;
            padding-left: 4px;
        }
        .article-content li::marker { color: var(--primary); }
        .article-content blockquote {
            border-left: 4px solid var(--primary);
            background: var(--primary-soft);
            padding: 18px 22px;
            margin: 24px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text);
            font-style: normal;
            font-size: 0.975rem;
        }
        .article-content blockquote p { margin: 0; }
        .article-content img {
            border-radius: var(--radius);
            margin: 24px 0;
            box-shadow: var(--shadow);
        }
        .article-content a {
            color: var(--primary);
            font-weight: 500;
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .article-content a:hover { color: var(--primary-dark); }
        .article-content code {
            background: var(--border-light);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.9em;
            color: var(--primary-dark);
        }
        .article-content pre {
            background: #1e293b;
            color: #e2e8f0;
            padding: 20px 24px;
            border-radius: var(--radius);
            overflow-x: auto;
            margin: 20px 0;
            font-size: 0.9rem;
            line-height: 1.6;
        }
        .article-content pre code {
            background: none;
            color: inherit;
            padding: 0;
        }

        @media (max-width: 768px) {
            .article-body-section { padding: 32px 0 48px; }
            .article-content { font-size: 1rem; line-height: 1.8; }
            .article-content h2 { font-size: 1.3rem; margin: 28px 0 12px; }
            .article-content h3 { font-size: 1.1rem; }
        }

        /* ========== ARTICLE SIDEBAR INFO ========== */
        .article-info-card {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 20px 22px;
            margin-bottom: 32px;
        }
        .article-info-card h5 {
            font-size: 0.85rem;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            color: var(--text-muted);
            margin-bottom: 14px;
            font-weight: 600;
        }
        .info-row {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 8px 0;
            font-size: 0.9rem;
            color: var(--text);
            border-bottom: 1px solid var(--border-light);
        }
        .info-row:last-child { border-bottom: none; }
        .info-row i {
            width: 20px;
            color: var(--primary);
            font-size: 0.9rem;
            text-align: center;
        }
        .info-row .label { color: var(--text-muted); font-size: 0.82rem; min-width: 48px; }

        /* ========== RELATED POSTS ========== */
        .related-section {
            padding: 56px 0 64px;
            background: var(--bg);
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.82rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .section-title {
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--text-strong);
            margin-bottom: 32px;
            letter-spacing: -0.01em;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border);
            transition: all var(--transition-slow);
            display: flex;
            flex-direction: column;
        }
        .related-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: transparent;
        }
        .related-card-img {
            height: 180px;
            overflow: hidden;
            position: relative;
            background: var(--border-light);
        }
        .related-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .related-card:hover .related-card-img img { transform: scale(1.04); }
        .related-card-body {
            padding: 18px 20px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .related-card-tag {
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 8px;
            letter-spacing: 0.02em;
        }
        .related-card-title {
            font-size: 1.05rem;
            font-weight: 650;
            color: var(--text-strong);
            margin-bottom: 8px;
            line-height: 1.45;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card-title a { color: inherit; }
        .related-card-title a:hover { color: var(--primary); }
        .related-card-meta {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-top: auto;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        @media (max-width: 992px) {
            .related-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 576px) {
            .related-grid { grid-template-columns: 1fr; }
            .section-title { font-size: 1.4rem; }
        }

        /* ========== CTA SECTION ========== */
        .cta-section {
            padding: 56px 0;
            background: var(--primary);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 280px;
            height: 280px;
            border-radius: 50%;
            background: rgba(255,255,255,0.06);
            pointer-events: none;
        }
        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: -40px;
            width: 180px;
            height: 180px;
            border-radius: 50%;
            background: rgba(255,255,255,0.05);
            pointer-events: none;
        }
        .cta-inner {
            position: relative;
            z-index: 1;
            text-align: center;
        }
        .cta-inner h2 {
            font-size: 1.75rem;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }
        .cta-inner p {
            color: rgba(255,255,255,0.85);
            font-size: 1rem;
            margin-bottom: 24px;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }
        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            border-radius: 50px;
            font-size: 1rem;
            font-weight: 650;
            background: #ffffff;
            color: var(--primary);
            border: none;
            transition: all var(--transition);
            letter-spacing: 0.01em;
            box-shadow: 0 8px 24px rgba(0,0,0,0.18);
        }
        .btn-cta:hover {
            background: #f1f5f9;
            color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 14px 32px rgba(0,0,0,0.22);
        }

        @media (max-width: 768px) {
            .cta-section { padding: 40px 0; }
            .cta-inner h2 { font-size: 1.4rem; }
        }

        /* ========== NOT FOUND ========== */
        .not-found-section {
            padding: 80px 0 100px;
            text-align: center;
            background: var(--bg-white);
        }
        .not-found-icon {
            font-size: 4rem;
            color: var(--text-muted);
            margin-bottom: 20px;
        }
        .not-found-section h1 {
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--text-strong);
            margin-bottom: 12px;
        }
        .not-found-section p {
            color: var(--text-light);
            margin-bottom: 24px;
            font-size: 1rem;
        }
        .btn-back-home {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius);
            font-weight: 600;
            background: var(--primary);
            color: #fff;
            transition: all var(--transition);
        }
        .btn-back-home:hover { background: var(--primary-dark); color: #fff; box-shadow: var(--shadow-md); }

        /* ========== FOOTER ========== */
        .site-footer {
            background: #0f172a;
            color: #cbd5e1;
            padding: 56px 0 28px;
            font-size: 0.9rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }
        .footer-brand-name {
            font-size: 1.2rem;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-brand-name i { color: var(--accent); }
        .footer-desc {
            color: #94a3b8;
            line-height: 1.7;
            font-size: 0.88rem;
        }
        .footer-col h4 {
            color: #ffffff;
            font-size: 0.95rem;
            font-weight: 650;
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li { margin-bottom: 8px; }
        .footer-col ul li a {
            color: #94a3b8;
            transition: color var(--transition);
            font-size: 0.88rem;
        }
        .footer-col ul li a:hover { color: #ffffff; }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 20px;
            text-align: center;
            font-size: 0.82rem;
            color: #64748b;
        }

        @media (max-width: 768px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
            .footer-grid > div:first-child { grid-column: 1 / -1; }
        }
        @media (max-width: 480px) {
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
        }

/* roulang page: category1 */
/* ==================== 设计变量 ==================== */
        :root {
            --color-primary: #1e40af;
            --color-primary-light: #2563eb;
            --color-primary-dark: #1a3590;
            --color-accent: #f97316;
            --color-accent-hover: #ea580c;
            --color-accent-light: #fff7ed;
            --color-success: #10b981;
            --color-success-light: #ecfdf5;
            --color-bg: #f8fafc;
            --color-surface: #ffffff;
            --color-text: #1e293b;
            --color-text-secondary: #64748b;
            --color-text-tertiary: #94a3b8;
            --color-border: #e5e7eb;
            --color-border-light: #f1f5f9;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-full: 50px;
            --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
            --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 32px rgba(0, 0, 0, 0.10), 0 4px 8px rgba(0, 0, 0, 0.05);
            --shadow-xl: 0 20px 48px rgba(0, 0, 0, 0.12), 0 8px 16px rgba(0, 0, 0, 0.06);
            --transition-fast: 0.15s ease;
            --transition-base: 0.25s ease;
            --transition-slow: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --container-max: 1200px;
            --container-narrow: 900px;
            --header-height: 68px;
        }

        /* ==================== 基础 Reset ==================== */
        *,
        *::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: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

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

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

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            outline: none;
            transition: all var(--transition-base);
        }

        button:focus-visible,
        a:focus-visible,
        input:focus-visible {
            outline: 3px solid rgba(37, 99, 235, 0.4);
            outline-offset: 3px;
            border-radius: 4px;
        }

        input {
            font-family: inherit;
            font-size: inherit;
            outline: none;
        }

        ul,
        ol {
            list-style: none;
        }

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

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

        /* ==================== Header / 导航 ==================== */
        .site-header {
            background: var(--color-surface);
            border-bottom: 1px solid var(--color-border);
            position: sticky;
            top: 0;
            z-index: 1000;
            height: var(--header-height);
            display: flex;
            align-items: center;
            box-shadow: var(--shadow-xs);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            background: rgba(255, 255, 255, 0.95);
        }

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

        .logo-area {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            font-weight: 700;
            font-size: 1.25rem;
            color: var(--color-primary);
            white-space: nowrap;
            letter-spacing: -0.01em;
        }

        .logo-area i {
            font-size: 1.5rem;
            color: var(--color-accent);
        }

        .logo-area:hover {
            color: var(--color-primary-light);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-links li a {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--color-text-secondary);
            white-space: nowrap;
            transition: all var(--transition-base);
            position: relative;
        }

        .nav-links li a:hover {
            color: var(--color-primary);
            background: rgba(37, 99, 235, 0.04);
        }

        .nav-links li a.active {
            color: var(--color-primary);
            background: rgba(37, 99, 235, 0.08);
            font-weight: 600;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .search-box {
            display: flex;
            align-items: center;
            background: var(--color-bg);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-full);
            padding: 8px 16px;
            gap: 8px;
            transition: all var(--transition-base);
            width: 200px;
        }

        .search-box:focus-within {
            border-color: var(--color-primary-light);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.08);
            background: var(--color-surface);
            width: 240px;
        }

        .search-box i {
            color: var(--color-text-tertiary);
            font-size: 0.9rem;
        }

        .search-box input {
            border: none;
            background: transparent;
            width: 100%;
            font-size: 0.9rem;
            color: var(--color-text);
        }

        .search-box input::placeholder {
            color: var(--color-text-tertiary);
        }

        .btn-header-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 20px;
            border-radius: var(--radius-full);
            font-size: 0.9rem;
            font-weight: 600;
            background: var(--color-accent);
            color: #fff;
            white-space: nowrap;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-base);
        }

        .btn-header-cta:hover {
            background: var(--color-accent-hover);
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }

        .btn-header-cta:active {
            transform: translateY(0);
            box-shadow: var(--shadow-xs);
        }

        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--color-text);
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: all var(--transition-base);
        }

        .mobile-menu-toggle:hover {
            background: var(--color-bg);
            color: var(--color-primary);
        }

        @media (max-width: 1024px) {
            .search-box {
                width: 160px;
            }
            .search-box:focus-within {
                width: 190px;
            }
            .btn-header-cta span {
                display: none;
            }
            .btn-header-cta {
                padding: 10px 14px;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                flex-wrap: wrap;
                gap: 12px;
            }
            .mobile-menu-toggle {
                display: flex;
                align-items: center;
                justify-content: center;
                order: 3;
            }
            .header-actions {
                order: 2;
                margin-left: auto;
            }
            .nav-links {
                display: none;
                order: 4;
                flex-direction: column;
                width: 100%;
                gap: 2px;
                padding: 8px 0;
                border-top: 1px solid var(--color-border);
                background: var(--color-surface);
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links li {
                width: 100%;
            }
            .nav-links li a {
                width: 100%;
                padding: 12px 16px;
                border-radius: var(--radius-sm);
            }
            .search-box {
                width: 130px;
                padding: 7px 12px;
            }
            .search-box:focus-within {
                width: 150px;
            }
            .site-header {
                height: auto;
                min-height: var(--header-height);
                padding: 8px 0;
            }
        }

        @media (max-width: 520px) {
            .header-inner {
                padding: 0 12px;
                gap: 8px;
            }
            .logo-area {
                font-size: 1rem;
            }
            .logo-area i {
                font-size: 1.2rem;
            }
            .search-box {
                width: 100px;
                padding: 6px 10px;
                font-size: 0.8rem;
            }
            .search-box:focus-within {
                width: 120px;
            }
            .btn-header-cta {
                padding: 8px 10px;
                font-size: 0.8rem;
            }
        }

        /* ==================== 主内容区 ==================== */
        .main-content {
            flex: 1;
        }

        /* ==================== 分类 Banner ==================== */
        .category-hero {
            position: relative;
            padding: 80px 0 72px;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            overflow: hidden;
            z-index: 1;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(30, 64, 175, 0.88) 0%, rgba(30, 64, 175, 0.78) 40%, rgba(15, 40, 110, 0.85) 100%);
            z-index: -1;
        }

        .category-hero::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: 50%;
            transform: translateX(-50%);
            width: 120px;
            height: 80px;
            background: var(--color-accent);
            border-radius: 50%;
            filter: blur(60px);
            opacity: 0.3;
            z-index: -1;
        }

        .category-hero-content {
            text-align: center;
            color: #fff;
            position: relative;
            z-index: 2;
        }

        .category-breadcrumb {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 20px;
            flex-wrap: wrap;
            justify-content: center;
        }

        .category-breadcrumb a {
            color: rgba(255, 255, 255, 0.85);
            transition: color var(--transition-base);
        }

        .category-breadcrumb a:hover {
            color: #fff;
            text-decoration: underline;
            text-underline-offset: 4px;
        }

        .category-breadcrumb i {
            font-size: 0.7rem;
            opacity: 0.6;
        }

        .category-hero h1 {
            font-size: clamp(2rem, 4vw, 2.8rem);
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 16px;
            line-height: 1.2;
        }

        .category-hero .hero-subtitle {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 620px;
            margin: 0 auto 28px;
            line-height: 1.6;
        }

        .hero-meta-row {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 24px;
            flex-wrap: wrap;
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.7);
        }

        .hero-meta-row span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .hero-meta-row i {
            font-size: 0.85rem;
        }

        @media (max-width: 768px) {
            .category-hero {
                padding: 56px 0 48px;
            }
            .category-hero h1 {
                font-size: 1.7rem;
            }
            .category-hero .hero-subtitle {
                font-size: 1rem;
                padding: 0 8px;
            }
        }

        @media (max-width: 520px) {
            .category-hero {
                padding: 40px 0 36px;
            }
            .category-hero h1 {
                font-size: 1.4rem;
            }
            .hero-meta-row {
                gap: 12px;
                font-size: 0.85rem;
            }
        }

        /* ==================== 板块间距 ==================== */
        .section {
            padding: 72px 0;
        }

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

        .section-title {
            font-size: clamp(1.5rem, 2.5vw, 1.9rem);
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }

        .section-subtitle {
            font-size: 1.05rem;
            color: var(--color-text-secondary);
            max-width: 600px;
            margin-bottom: 40px;
            line-height: 1.6;
        }

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

        .section-header .section-subtitle {
            margin-left: auto;
            margin-right: auto;
        }

        @media (max-width: 768px) {
            .section {
                padding: 48px 0;
            }
            .section-sm {
                padding: 32px 0;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .section-subtitle {
                font-size: 0.95rem;
                margin-bottom: 28px;
            }
            .section-header {
                margin-bottom: 32px;
            }
        }

        /* ==================== 分类介绍区 ==================== */
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .intro-image-wrap {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        .intro-image-wrap img {
            width: 100%;
            height: auto;
            object-fit: cover;
            aspect-ratio: 4/3;
            transition: transform var(--transition-slow);
        }

        .intro-image-wrap:hover img {
            transform: scale(1.03);
        }

        .intro-image-badge {
            position: absolute;
            bottom: 16px;
            right: 16px;
            background: var(--color-surface);
            color: var(--color-primary);
            font-weight: 700;
            font-size: 0.85rem;
            padding: 8px 16px;
            border-radius: var(--radius-full);
            box-shadow: var(--shadow-md);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .intro-text h2 {
            font-size: 1.7rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--color-text);
            letter-spacing: -0.01em;
        }

        .intro-text p {
            color: var(--color-text-secondary);
            line-height: 1.8;
            margin-bottom: 20px;
        }

        .intro-highlights {
            display: flex;
            flex-direction: column;
            gap: 12px;
            margin-bottom: 24px;
        }

        .intro-highlight-item {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 0.95rem;
            color: var(--color-text);
            line-height: 1.5;
        }

        .intro-highlight-item i {
            color: var(--color-success);
            margin-top: 3px;
            flex-shrink: 0;
        }

        @media (max-width: 768px) {
            .intro-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .intro-image-wrap {
                order: -1;
                max-width: 500px;
                margin: 0 auto;
            }
            .intro-text h2 {
                font-size: 1.4rem;
            }
        }

        /* ==================== 文章列表网格 ==================== */
        .articles-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .article-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--color-border-light);
            box-shadow: var(--shadow-xs);
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
            height: 100%;
        }

        .article-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
            border-color: var(--color-border);
        }

        .article-card-image {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16/10;
            background: var(--color-bg);
        }

        .article-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

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

        .article-card-tags {
            position: absolute;
            top: 12px;
            left: 12px;
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
        }

        .article-tag {
            display: inline-block;
            padding: 4px 10px;
            border-radius: var(--radius-full);
            font-size: 0.75rem;
            font-weight: 600;
            background: rgba(255, 255, 255, 0.9);
            color: var(--color-primary);
            backdrop-filter: blur(6px);
            -webkit-backdrop-filter: blur(6px);
            letter-spacing: 0.02em;
        }

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

        .article-card-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 8px;
            color: var(--color-text);
            letter-spacing: -0.005em;
            transition: color var(--transition-base);
        }

        .article-card:hover .article-card-body h3 {
            color: var(--color-primary);
        }

        .article-card-body .article-excerpt {
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            line-height: 1.6;
            flex: 1;
            margin-bottom: 14px;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .article-card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.8rem;
            color: var(--color-text-tertiary);
            padding-top: 12px;
            border-top: 1px solid var(--color-border-light);
        }

        .article-card-footer .read-more {
            color: var(--color-primary);
            font-weight: 600;
            font-size: 0.85rem;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap var(--transition-base);
        }

        .article-card:hover .read-more {
            gap: 8px;
        }

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

        @media (max-width: 520px) {
            .articles-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .article-card-body {
                padding: 16px;
            }
            .article-card-body h3 {
                font-size: 1rem;
            }
        }

        /* ==================== 步骤流程区 ==================== */
        .steps-section {
            background: var(--color-surface);
            border-top: 1px solid var(--color-border-light);
            border-bottom: 1px solid var(--color-border-light);
        }

        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .step-card {
            text-align: center;
            padding: 32px 20px;
            border-radius: var(--radius-lg);
            background: var(--color-bg);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-base);
            position: relative;
        }

        .step-card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--color-border);
            transform: translateY(-2px);
        }

        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--color-primary);
            color: #fff;
            font-size: 1.2rem;
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: -0.02em;
            box-shadow: 0 4px 12px rgba(30, 64, 175, 0.3);
        }

        .step-icon-wrap {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--color-accent-light);
            color: var(--color-accent);
            font-size: 1.4rem;
            margin-bottom: 16px;
            transition: all var(--transition-base);
        }

        .step-card:hover .step-icon-wrap {
            background: var(--color-accent);
            color: #fff;
            box-shadow: 0 4px 16px rgba(249, 115, 22, 0.3);
        }

        .step-card h3 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--color-text);
        }

        .step-card p {
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            line-height: 1.5;
        }

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

        @media (max-width: 520px) {
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .step-card {
                padding: 24px 16px;
                display: flex;
                align-items: center;
                gap: 16px;
                text-align: left;
            }
            .step-icon-wrap,
            .step-number {
                margin-bottom: 0;
                flex-shrink: 0;
                width: 44px;
                height: 44px;
                font-size: 1.1rem;
            }
        }

        /* ==================== 热门标签区 ==================== */
        .tags-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
        }

        .tag-pill {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 18px;
            border-radius: var(--radius-full);
            font-size: 0.9rem;
            font-weight: 500;
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            color: var(--color-text-secondary);
            transition: all var(--transition-base);
            cursor: pointer;
        }

        .tag-pill:hover {
            border-color: var(--color-primary-light);
            color: var(--color-primary);
            background: rgba(37, 99, 235, 0.03);
            box-shadow: var(--shadow-sm);
            transform: translateY(-1px);
        }

        .tag-pill.tag-hot {
            background: var(--color-accent-light);
            border-color: var(--color-accent);
            color: var(--color-accent);
            font-weight: 600;
        }

        .tag-pill i {
            font-size: 0.8rem;
        }

        @media (max-width: 520px) {
            .tag-pill {
                padding: 8px 14px;
                font-size: 0.8rem;
            }
        }

        /* ==================== FAQ 区 ==================== */
        .faq-section {
            background: var(--color-surface);
            border-top: 1px solid var(--color-border-light);
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            max-width: var(--container-narrow);
            margin: 0 auto;
        }

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

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

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            color: var(--color-text);
            gap: 12px;
            user-select: none;
            transition: color var(--transition-base);
        }

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

        .faq-question i {
            flex-shrink: 0;
            color: var(--color-text-tertiary);
            transition: transform var(--transition-base);
            font-size: 0.85rem;
        }

        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--color-primary);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-slow);
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
        }

        .faq-answer-inner {
            padding: 0 22px 18px;
            font-size: 0.95rem;
            color: var(--color-text-secondary);
            line-height: 1.7;
        }

        @media (max-width: 520px) {
            .faq-question {
                padding: 14px 16px;
                font-size: 0.9rem;
            }
            .faq-answer-inner {
                padding: 0 16px 14px;
                font-size: 0.85rem;
            }
        }

        /* ==================== CTA 区 ==================== */
        .cta-section {
            background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
            color: #fff;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -80px;
            width: 280px;
            height: 280px;
            background: var(--color-accent);
            border-radius: 50%;
            filter: blur(100px);
            opacity: 0.25;
            pointer-events: none;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -50px;
            left: -60px;
            width: 200px;
            height: 200px;
            background: rgba(255, 255, 255, 0.15);
            border-radius: 50%;
            filter: blur(70px);
            opacity: 0.3;
            pointer-events: none;
        }

        .cta-content {
            position: relative;
            z-index: 2;
            max-width: 650px;
            margin: 0 auto;
        }

        .cta-content h2 {
            font-size: clamp(1.6rem, 3vw, 2.1rem);
            font-weight: 800;
            margin-bottom: 14px;
            letter-spacing: -0.01em;
        }

        .cta-content p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 28px;
            line-height: 1.6;
        }

        .cta-buttons {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 28px;
            border-radius: var(--radius-full);
            font-size: 1rem;
            font-weight: 600;
            transition: all var(--transition-base);
            letter-spacing: 0.01em;
        }

        .btn-primary {
            background: #fff;
            color: var(--color-primary);
            box-shadow: var(--shadow-md);
        }

        .btn-primary:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
        }

        .btn-primary:active {
            transform: translateY(0);
        }

        .btn-outline-light {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.5);
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #fff;
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }

        @media (max-width: 520px) {
            .btn {
                padding: 12px 22px;
                font-size: 0.9rem;
            }
            .cta-content h2 {
                font-size: 1.3rem;
            }
            .cta-content p {
                font-size: 0.9rem;
            }
        }

        /* ==================== 页脚 ==================== */
        .site-footer {
            background: #0f172a;
            color: #cbd5e1;
            padding: 56px 0 28px;
            font-size: 0.9rem;
            line-height: 1.7;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 36px;
        }

        .footer-brand-name {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
            letter-spacing: -0.01em;
        }

        .footer-brand-name i {
            color: var(--color-accent);
        }

        .footer-desc {
            color: #94a3b8;
            font-size: 0.9rem;
            line-height: 1.7;
        }

        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }

        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-col ul li a {
            color: #94a3b8;
            transition: color var(--transition-base);
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .footer-col ul li a:hover {
            color: #fff;
            text-decoration: underline;
            text-underline-offset: 4px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 20px;
            text-align: center;
            color: #64748b;
            font-size: 0.85rem;
        }

        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }

        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-desc {
                font-size: 0.85rem;
            }
            .site-footer {
                padding: 36px 0 20px;
            }
        }

        /* ==================== 辅助组件 ==================== */
        .badge-count {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 22px;
            height: 22px;
            padding: 0 6px;
            border-radius: var(--radius-full);
            background: var(--color-accent);
            color: #fff;
            font-size: 0.7rem;
            font-weight: 700;
            letter-spacing: 0.02em;
        }

        .divider {
            width: 60px;
            height: 4px;
            border-radius: 2px;
            background: var(--color-accent);
            margin: 0 auto 20px;
        }

        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }