/* roulang page: index */
:root {
            --primary: #1e40af;
            --primary-light: #3b82f6;
            --primary-dark: #1e3a8a;
            --accent: #0891b2;
            --accent-light: #06b6d4;
            --gold: #d97706;
            --gold-light: #f59e0b;
            --bg: #f8fafc;
            --bg-white: #ffffff;
            --bg-dark: #0f172a;
            --bg-dark-alt: #1e293b;
            --text: #1e293b;
            --text-light: #475569;
            --text-muted: #64748b;
            --text-white: #f1f5f9;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius-sm: 8px;
            --radius: 12px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --radius-full: 9999px;
            --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
            --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 4px 12px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.08), 0 8px 32px rgba(0,0,0,0.04);
            --shadow-lg: 0 8px 28px rgba(0,0,0,0.1), 0 16px 48px rgba(0,0,0,0.06);
            --shadow-xl: 0 16px 40px rgba(0,0,0,0.12), 0 24px 64px rgba(0,0,0,0.06);
            --transition: 0.2s ease;
            --transition-slow: 0.35s ease;
            --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --max-width: 1240px;
            --nav-height: 64px;
            --section-gap: 80px;
        }

        *,*::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:1.65;
            color:var(--text);
            background:var(--bg);
            min-height:100vh;
            overflow-x:hidden;
        }
        a{text-decoration:none;color:inherit;transition:color var(--transition);}
        img{max-width:100%;height:auto;display:block;}
        button,input,select,textarea{font-family:inherit;font-size:inherit;}
        ul,ol{list-style:none;}
        h1,h2,h3,h4,h5,h6{line-height:1.25;font-weight:700;color:var(--text);}
        h1{font-size:clamp(2rem, 4vw, 3rem);}
        h2{font-size:clamp(1.5rem, 3vw, 2.25rem);}
        h3{font-size:clamp(1.15rem, 2vw, 1.4rem);}

        .container{width:100%;max-width:var(--max-width);margin-left:auto;margin-right:auto;padding-left:20px;padding-right:20px;}
        .section{padding:var(--section-gap) 0;}
        .section-sm{padding:48px 0;}
        .section-label{
            display:inline-flex;align-items:center;gap:8px;
            font-size:0.85rem;font-weight:600;text-transform:uppercase;
            letter-spacing:0.06em;color:var(--primary-light);
            margin-bottom:12px;
        }
        .section-label::before{
            content:'';display:block;width:28px;height:2px;
            background:var(--primary-light);border-radius:2px;
        }
        .section-title{
            font-size:clamp(1.5rem, 3vw, 2.2rem);
            font-weight:800;color:var(--text);
            margin-bottom:16px;letter-spacing:-0.01em;
        }
        .section-subtitle{
            font-size:1.05rem;color:var(--text-muted);
            max-width:600px;line-height:1.7;
        }
        .section-header{text-align:center;margin-bottom:48px;}
        .section-header .section-subtitle{margin-left:auto;margin-right:auto;}

        /* ========== NAVIGATION ========== */
        .site-header{
            position:fixed;top:16px;left:50%;transform:translateX(-50%);
            z-index:1000;width:calc(100% - 32px);max-width:900px;
            pointer-events:none;
        }
        .nav-capsule{
            background:rgba(255,255,255,0.85);
            backdrop-filter:blur(20px);
            -webkit-backdrop-filter:blur(20px);
            border:1px solid rgba(255,255,255,0.6);
            border-radius:var(--radius-full);
            padding:6px 8px;
            display:flex;align-items:center;justify-content:space-between;
            box-shadow:0 4px 24px rgba(0,0,0,0.08),0 1px 4px rgba(0,0,0,0.04);
            pointer-events:auto;
            transition:box-shadow var(--transition),background var(--transition);
        }
        .nav-capsule.scrolled{
            background:rgba(255,255,255,0.95);
            box-shadow:0 6px 32px rgba(0,0,0,0.12),0 2px 8px rgba(0,0,0,0.06);
        }
        .nav-logo{
            display:flex;align-items:center;gap:10px;
            font-weight:800;font-size:1.1rem;color:var(--primary-dark);
            padding:8px 16px;border-radius:var(--radius-full);
            transition:background var(--transition);
            white-space:nowrap;
            letter-spacing:-0.01em;
        }
        .nav-logo:hover{background:rgba(30,64,175,0.06);}
        .nav-logo-icon{
            width:34px;height:34px;border-radius:var(--radius-sm);
            background:linear-gradient(135deg,var(--primary),var(--accent));
            display:flex;align-items:center;justify-content:center;
            color:#fff;font-weight:900;font-size:0.95rem;
            flex-shrink:0;
        }
        .nav-links{
            display:flex;align-items:center;gap:4px;
        }
        .nav-links a{
            display:inline-flex;align-items:center;padding:9px 18px;
            border-radius:var(--radius-full);font-weight:600;
            font-size:0.92rem;color:var(--text-light);
            transition:all var(--transition);white-space:nowrap;
            position:relative;
        }
        .nav-links a:hover{color:var(--primary);background:rgba(30,64,175,0.05);}
        .nav-links a.active{
            color:#fff;background:var(--primary);
            box-shadow:0 2px 8px rgba(30,64,175,0.3);
        }
        .nav-links a.active:hover{background:var(--primary-dark);}
        .nav-cta-btn{
            display:inline-flex;align-items:center;gap:6px;
            padding:10px 20px;border-radius:var(--radius-full);
            font-weight:700;font-size:0.9rem;
            background:var(--gold);color:#fff;
            transition:all var(--transition);
            white-space:nowrap;margin-left:4px;
            box-shadow:0 2px 8px rgba(217,119,6,0.25);
        }
        .nav-cta-btn:hover{
            background:var(--gold-light);
            box-shadow:0 4px 16px rgba(217,119,6,0.35);
            transform:translateY(-1px);
        }
        .nav-toggle{
            display:none;width:40px;height:40px;border-radius:50%;
            background:transparent;border:none;cursor:pointer;
            align-items:center;justify-content:center;
            flex-direction:column;gap:5px;pointer-events:auto;
            transition:background var(--transition);
        }
        .nav-toggle:hover{background:rgba(0,0,0,0.04);}
        .nav-toggle span{
            display:block;width:20px;height:2px;background:var(--text);
            border-radius:2px;transition:all var(--transition);
        }
        .nav-toggle.active span:nth-child(1){transform:rotate(45deg) translate(5px,5px);}
        .nav-toggle.active span:nth-child(2){opacity:0;}
        .nav-toggle.active span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px);}

        /* ========== HERO ========== */
        .hero{
            position:relative;min-height:100vh;
            display:flex;align-items:center;justify-content:center;
            padding:120px 20px 80px;
            background:linear-gradient(160deg, #0f172a 0%, #1e3a8a 35%, #0f172a 70%, #1e293b 100%);
            overflow:hidden;
            text-align:center;
        }
        .hero-bg{
            position:absolute;inset:0;z-index:0;
            background-image:url('/assets/images/backpic/back-1.png');
            background-size:cover;background-position:center;
            opacity:0.35;mix-blend-mode:soft-light;
        }
        .hero-overlay{
            position:absolute;inset:0;z-index:1;
            background:radial-gradient(ellipse at center, transparent 30%, rgba(15,23,42,0.7) 100%);
        }
        .hero-particles{
            position:absolute;inset:0;z-index:1;overflow:hidden;
            pointer-events:none;
        }
        .hero-particle{
            position:absolute;border-radius:50%;
            background:rgba(255,255,255,0.06);
            animation:floatUp 12s infinite ease-in-out;
        }
        @keyframes floatUp{
            0%{transform:translateY(0) scale(1);opacity:0;}
            20%{opacity:1;}
            80%{opacity:1;}
            100%{transform:translateY(-100vh) scale(0.4);opacity:0;}
        }
        .hero-content{position:relative;z-index:2;max-width:800px;}
        .hero-badge{
            display:inline-flex;align-items:center;gap:8px;
            background:rgba(255,255,255,0.1);
            border:1px solid rgba(255,255,255,0.2);
            border-radius:var(--radius-full);
            padding:8px 20px;font-size:0.88rem;font-weight:600;
            color:rgba(255,255,255,0.9);margin-bottom:28px;
            backdrop-filter:blur(10px);
            letter-spacing:0.02em;
        }
        .hero-badge-dot{
            width:8px;height:8px;border-radius:50%;
            background:#22c55e;box-shadow:0 0 10px #22c55e;
            animation:pulse-dot 2s infinite;
        }
        @keyframes pulse-dot{
            0%,100%{box-shadow:0 0 6px #22c55e;}
            50%{box-shadow:0 0 18px #22c55e,0 0 30px rgba(34,197,94,0.5);}
        }
        .hero h1{
            font-size:clamp(2rem, 5vw, 3.5rem);
            font-weight:900;color:#fff;
            margin-bottom:20px;letter-spacing:-0.02em;
            line-height:1.15;
        }
        .hero h1 .highlight{
            background:linear-gradient(135deg,var(--accent-light),#22d3ee);
            -webkit-background-clip:text;-webkit-text-fill-color:transparent;
            background-clip:text;
        }
        .hero-desc{
            font-size:1.12rem;color:rgba(255,255,255,0.75);
            max-width:560px;margin:0 auto 36px;
            line-height:1.7;
        }
        .hero-actions{
            display:flex;align-items:center;justify-content:center;
            gap:14px;flex-wrap:wrap;
        }
        .btn{
            display:inline-flex;align-items:center;gap:8px;
            padding:13px 28px;border-radius:var(--radius-full);
            font-weight:700;font-size:1rem;cursor:pointer;
            transition:all var(--transition);
            border:none;text-align:center;
            white-space:nowrap;letter-spacing:0.01em;
        }
        .btn:focus-visible{outline:3px solid rgba(59,130,246,0.6);outline-offset:3px;}
        .btn-primary{
            background:var(--primary-light);color:#fff;
            box-shadow:0 4px 16px rgba(59,130,246,0.35);
        }
        .btn-primary:hover{
            background:var(--primary);
            box-shadow:0 6px 24px rgba(30,64,175,0.4);
            transform:translateY(-2px);
        }
        .btn-outline{
            background:rgba(255,255,255,0.08);
            color:#fff;border:1.5px solid rgba(255,255,255,0.3);
            backdrop-filter:blur(8px);
        }
        .btn-outline:hover{
            background:rgba(255,255,255,0.16);
            border-color:rgba(255,255,255,0.5);
            transform:translateY(-2px);
        }
        .btn-accent{
            background:var(--gold);color:#fff;
            box-shadow:0 4px 16px rgba(217,119,6,0.3);
        }
        .btn-accent:hover{
            background:var(--gold-light);
            box-shadow:0 6px 24px rgba(217,119,6,0.4);
            transform:translateY(-2px);
        }
        .btn-sm{padding:8px 18px;font-size:0.88rem;}
        .hero-stats{
            display:flex;gap:40px;justify-content:center;
            margin-top:48px;flex-wrap:wrap;
        }
        .hero-stat{
            text-align:center;
        }
        .hero-stat-num{
            font-size:2rem;font-weight:900;color:#fff;
            letter-spacing:-0.02em;
        }
        .hero-stat-label{
            font-size:0.85rem;color:rgba(255,255,255,0.6);
            margin-top:4px;
        }

        /* ========== FEATURES ========== */
        .features-grid{
            display:grid;grid-template-columns:repeat(3,1fr);
            gap:24px;
        }
        .feature-card{
            background:var(--bg-white);border-radius:var(--radius-lg);
            padding:32px 28px;border:1px solid var(--border);
            transition:all var(--transition-slow);
            position:relative;overflow:hidden;
        }
        .feature-card:hover{
            transform:translateY(-4px);
            box-shadow:var(--shadow-lg);
            border-color:transparent;
        }
        .feature-card::before{
            content:'';position:absolute;top:0;left:0;right:0;
            height:3px;background:linear-gradient(90deg,var(--primary-light),var(--accent-light));
            opacity:0;transition:opacity var(--transition-slow);
        }
        .feature-card:hover::before{opacity:1;}
        .feature-icon{
            width:52px;height:52px;border-radius:var(--radius);
            display:flex;align-items:center;justify-content:center;
            font-size:1.5rem;margin-bottom:20px;
            background:rgba(30,64,175,0.08);color:var(--primary-light);
        }
        .feature-card h3{font-size:1.15rem;margin-bottom:8px;font-weight:700;}
        .feature-card p{font-size:0.92rem;color:var(--text-muted);line-height:1.6;}

        /* ========== CATEGORY SECTION ========== */
        .category-grid{
            display:grid;grid-template-columns:repeat(2,1fr);
            gap:24px;
        }
        .category-card{
            position:relative;border-radius:var(--radius-lg);
            overflow:hidden;min-height:260px;
            display:flex;align-items:flex-end;
            cursor:pointer;transition:all var(--transition-slow);
            box-shadow:var(--shadow);
        }
        .category-card:hover{
            transform:translateY(-4px);
            box-shadow:var(--shadow-xl);
        }
        .category-card-img{
            position:absolute;inset:0;z-index:0;
        }
        .category-card-img img{
            width:100%;height:100%;object-fit:cover;
            transition:transform var(--transition-slow);
        }
        .category-card:hover .category-card-img img{transform:scale(1.06);}
        .category-card-overlay{
            position:absolute;inset:0;z-index:1;
            background:linear-gradient(to top,rgba(15,23,42,0.85) 0%,rgba(15,23,42,0.3) 50%,rgba(15,23,42,0.05) 100%);
        }
        .category-card-body{
            position:relative;z-index:2;padding:28px;
            color:#fff;width:100%;
        }
        .category-card-badge{
            display:inline-block;padding:5px 14px;
            border-radius:var(--radius-full);font-size:0.78rem;
            font-weight:700;background:rgba(255,255,255,0.2);
            backdrop-filter:blur(6px);margin-bottom:12px;
            letter-spacing:0.03em;
        }
        .category-card h3{color:#fff;font-size:1.3rem;margin-bottom:6px;font-weight:800;}
        .category-card p{color:rgba(255,255,255,0.8);font-size:0.9rem;line-height:1.5;}
        .category-card-arrow{
            display:inline-flex;align-items:center;gap:6px;
            margin-top:12px;font-weight:700;font-size:0.9rem;
            color:var(--accent-light);transition:gap var(--transition);
        }
        .category-card:hover .category-card-arrow{gap:10px;}

        /* ========== CMS NEWS LIST ========== */
        .news-list{
            display:grid;grid-template-columns:repeat(2,1fr);
            gap:20px;
        }
        .news-card{
            background:var(--bg-white);border-radius:var(--radius-lg);
            padding:24px;border:1px solid var(--border);
            transition:all var(--transition);
            display:flex;gap:18px;align-items:flex-start;
        }
        .news-card:hover{
            box-shadow:var(--shadow-md);
            border-color:transparent;
            transform:translateY(-2px);
        }
        .news-card-thumb{
            width:100px;height:80px;border-radius:var(--radius);
            overflow:hidden;flex-shrink:0;
            background:var(--bg);
        }
        .news-card-thumb img{width:100%;height:100%;object-fit:cover;}
        .news-card-info{flex:1;min-width:0;}
        .news-card-tag{
            display:inline-block;padding:3px 12px;
            border-radius:var(--radius-full);font-size:0.75rem;
            font-weight:600;background:rgba(8,145,178,0.1);
            color:var(--accent);margin-bottom:8px;
        }
        .news-card h4{
            font-size:0.98rem;font-weight:700;margin-bottom:6px;
            line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;
            -webkit-box-orient:vertical;overflow:hidden;
        }
        .news-card h4 a{color:var(--text);transition:color var(--transition);}
        .news-card h4 a:hover{color:var(--primary-light);}
        .news-card p{
            font-size:0.84rem;color:var(--text-muted);
            line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;
            -webkit-box-orient:vertical;overflow:hidden;
        }
        .news-card-meta{
            font-size:0.78rem;color:var(--text-muted);
            margin-top:8px;display:flex;gap:12px;align-items:center;
        }
        .news-empty{
            text-align:center;padding:48px 20px;
            color:var(--text-muted);font-size:1rem;
            background:var(--bg-white);border-radius:var(--radius-lg);
            border:2px dashed var(--border);
        }

        /* ========== STEPS / PROCESS ========== */
        .steps-grid{
            display:grid;grid-template-columns:repeat(4,1fr);
            gap:20px;position:relative;
        }
        .step-card{
            text-align:center;padding:32px 20px;
            background:var(--bg-white);border-radius:var(--radius-lg);
            border:1px solid var(--border);position:relative;
            transition:all var(--transition);
        }
        .step-card:hover{box-shadow:var(--shadow-md);transform:translateY(-3px);}
        .step-number{
            width:48px;height:48px;border-radius:50%;
            background:linear-gradient(135deg,var(--primary-light),var(--primary-dark));
            color:#fff;display:inline-flex;align-items:center;
            justify-content:center;font-weight:900;font-size:1.2rem;
            margin-bottom:16px;
        }
        .step-card h4{font-size:1rem;margin-bottom:6px;font-weight:700;}
        .step-card p{font-size:0.85rem;color:var(--text-muted);line-height:1.5;}

        /* ========== DATA SHOWCASE ========== */
        .data-section{
            background:var(--bg-dark);
            color:var(--text-white);padding:80px 0;
            position:relative;overflow:hidden;
        }
        .data-section .section-title{color:#fff;}
        .data-section .section-subtitle{color:rgba(255,255,255,0.65);}
        .data-grid{
            display:grid;grid-template-columns:repeat(4,1fr);
            gap:24px;
        }
        .data-card{
            text-align:center;padding:36px 20px;
            background:rgba(255,255,255,0.04);
            border-radius:var(--radius-lg);
            border:1px solid rgba(255,255,255,0.08);
            transition:all var(--transition);
        }
        .data-card:hover{
            background:rgba(255,255,255,0.08);
            border-color:rgba(255,255,255,0.18);
            transform:translateY(-3px);
        }
        .data-card-num{
            font-size:2.5rem;font-weight:900;
            background:linear-gradient(135deg,#60a5fa,#22d3ee);
            -webkit-background-clip:text;-webkit-text-fill-color:transparent;
            background-clip:text;margin-bottom:8px;
        }
        .data-card-label{font-size:0.9rem;color:rgba(255,255,255,0.6);}

        /* ========== FAQ ========== */
        .faq-list{max-width:800px;margin:0 auto;}
        .faq-item{
            background:var(--bg-white);border-radius:var(--radius-lg);
            border:1px solid var(--border);margin-bottom:14px;
            overflow:hidden;transition:all var(--transition);
        }
        .faq-item:hover{border-color:var(--primary-light);box-shadow:var(--shadow-sm);}
        .faq-question{
            width:100%;padding:20px 24px;text-align:left;
            background:transparent;border:none;cursor:pointer;
            font-weight:700;font-size:1rem;color:var(--text);
            display:flex;justify-content:space-between;align-items:center;
            gap:16px;transition:color var(--transition);
        }
        .faq-question:hover{color:var(--primary-light);}
        .faq-icon{flex-shrink:0;width:28px;height:28px;border-radius:50%;background:var(--bg);display:flex;align-items:center;justify-content:center;font-size:1.1rem;transition:all var(--transition);color:var(--text-muted);}
        .faq-item.open .faq-icon{background:var(--primary-light);color:#fff;transform:rotate(45deg);}
        .faq-answer{padding:0 24px 20px;font-size:0.92rem;color:var(--text-muted);line-height:1.7;display:none;}
        .faq-item.open .faq-answer{display:block;}

        /* ========== CTA ========== */
        .cta-section{
            background:linear-gradient(135deg,var(--primary-dark),var(--primary));
            color:#fff;text-align:center;padding:72px 20px;
            border-radius:var(--radius-xl);margin:0 20px 60px;
            position:relative;overflow:hidden;
        }
        .cta-section::before{
            content:'';position:absolute;inset:0;
            background:url('/assets/images/backpic/back-2.png') center/cover;
            opacity:0.12;mix-blend-mode:soft-light;
        }
        .cta-content{position:relative;z-index:1;max-width:600px;margin:0 auto;}
        .cta-section h2{color:#fff;margin-bottom:12px;}
        .cta-section p{color:rgba(255,255,255,0.8);margin-bottom:28px;font-size:1.05rem;}
        .cta-section .btn-primary{background:#fff;color:var(--primary-dark);box-shadow:0 4px 20px rgba(0,0,0,0.2);}
        .cta-section .btn-primary:hover{background:#f1f5f9;box-shadow:0 6px 28px rgba(0,0,0,0.3);}

        /* ========== FOOTER ========== */
        .site-footer{
            background:var(--bg-dark);color:rgba(255,255,255,0.7);
            padding:48px 0 32px;
        }
        .footer-grid{
            display:grid;grid-template-columns:2fr 1fr 1fr;
            gap:40px;margin-bottom:36px;
        }
        .footer-brand-name{
            font-size:1.2rem;font-weight:800;color:#fff;
            margin-bottom:10px;
        }
        .footer-desc{font-size:0.9rem;line-height:1.6;max-width:320px;}
        .footer-col h4{color:#fff;font-size:0.95rem;margin-bottom:16px;font-weight:700;}
        .footer-col a{
            display:block;font-size:0.88rem;color:rgba(255,255,255,0.6);
            padding:5px 0;transition:color var(--transition);
        }
        .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:0.84rem;color:rgba(255,255,255,0.45);
        }

        /* ========== RESPONSIVE ========== */
        @media(max-width:1024px){
            .features-grid{grid-template-columns:repeat(2,1fr);}
            .steps-grid{grid-template-columns:repeat(2,1fr);}
            .data-grid{grid-template-columns:repeat(2,1fr);}
            .news-list{grid-template-columns:1fr;}
            .category-grid{grid-template-columns:1fr;}
            .footer-grid{grid-template-columns:1fr 1fr;}
        }
        @media(max-width:768px){
            :root{--section-gap:56px;--nav-height:56px;}
            .site-header{top:10px;width:calc(100% - 20px);}
            .nav-capsule{padding:4px 6px;}
            .nav-links{display:none;position:absolute;top:calc(100% + 8px);left:0;right:0;flex-direction:column;background:rgba(255,255,255,0.97);backdrop-filter:blur(20px);border-radius:var(--radius-lg);padding:12px;box-shadow:var(--shadow-lg);border:1px solid var(--border);gap:2px;}
            .nav-links.show{display:flex;}
            .nav-links a{padding:12px 16px;width:100%;border-radius:var(--radius);}
            .nav-cta-btn{margin-left:0;width:100%;justify-content:center;margin-top:4px;}
            .nav-toggle{display:flex;}
            .hero-stats{gap:24px;}
            .hero-stat-num{font-size:1.5rem;}
            .features-grid{grid-template-columns:1fr;}
            .steps-grid{grid-template-columns:1fr;}
            .data-grid{grid-template-columns:repeat(2,1fr);}
            .footer-grid{grid-template-columns:1fr;gap:28px;}
            .cta-section{margin:0 12px 40px;border-radius:var(--radius-lg);}
            .news-card{flex-direction:column;}
            .news-card-thumb{width:100%;height:160px;}
            .category-card{min-height:200px;}
        }
        @media(max-width:520px){
            .hero{padding:100px 16px 60px;min-height:90vh;}
            .hero h1{font-size:1.7rem;}
            .hero-desc{font-size:0.95rem;}
            .hero-actions{flex-direction:column;width:100%;}
            .hero-actions .btn{width:100%;justify-content:center;}
            .hero-stats{gap:16px;}
            .hero-stat-num{font-size:1.25rem;}
            .data-grid{grid-template-columns:1fr;}
            .section{padding:40px 0;}
            .section-header{margin-bottom:32px;}
            .nav-logo{font-size:0.95rem;padding:6px 10px;}
            .nav-logo-icon{width:28px;height:28px;font-size:0.8rem;}
        }

/* roulang page: article */
:root {
            --color-primary: #2563eb;
            --color-primary-dark: #1d4ed8;
            --color-primary-light: #3b82f6;
            --color-primary-bg: #eff6ff;
            --color-accent: #f59e0b;
            --color-accent-light: #fbbf24;
            --color-bg: #f8fafc;
            --color-surface: #ffffff;
            --color-text: #1e293b;
            --color-text-strong: #0f172a;
            --color-text-weak: #64748b;
            --color-text-muted: #94a3b8;
            --color-border: #e2e8f0;
            --color-border-light: #f1f5f9;
            --color-success: #10b981;
            --color-danger: #ef4444;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-full: 9999px;
            --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.10);
            --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.12);
            --space-xs: 8px;
            --space-sm: 16px;
            --space-md: 24px;
            --space-lg: 32px;
            --space-xl: 48px;
            --space-2xl: 64px;
            --space-3xl: 80px;
            --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --font-mono: 'SF Mono', 'Fira Code', 'Fira Mono', 'Roboto Mono', 'Consolas', monospace;
            --transition-fast: 0.15s ease;
            --transition-normal: 0.25s ease;
            --transition-slow: 0.35s ease;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--color-primary-dark);
        }
        a:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 3px;
            border-radius: 2px;
        }

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

        button {
            cursor: pointer;
            font-family: inherit;
        }

        input,
        textarea {
            font-family: inherit;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--space-sm);
        }
        .container-narrow {
            max-width: 860px;
        }

        /* ========== HEADER & NAVIGATION ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            padding: 12px 0;
            background: transparent;
            transition: background var(--transition-normal), box-shadow var(--transition-normal);
        }
        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            box-shadow: var(--shadow-md);
        }

        .nav-capsule {
            max-width: 1200px;
            margin: 0 auto;
            padding: 8px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-radius: var(--radius-full);
            box-shadow: var(--shadow-sm);
            border: 1px solid rgba(255, 255, 255, 0.6);
            transition: all var(--transition-normal);
        }
        .site-header.scrolled .nav-capsule {
            background: rgba(255, 255, 255, 0.96);
            box-shadow: var(--shadow-md);
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.2rem;
            color: var(--color-text-strong);
            white-space: nowrap;
            transition: opacity var(--transition-fast);
            text-decoration: none;
        }
        .nav-logo:hover {
            opacity: 0.8;
            color: var(--color-text-strong);
        }
        .nav-logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
            color: #fff;
            font-weight: 800;
            font-size: 1.1rem;
            flex-shrink: 0;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-links a {
            display: inline-flex;
            align-items: center;
            padding: 10px 18px;
            border-radius: var(--radius-full);
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--color-text);
            transition: all var(--transition-fast);
            white-space: nowrap;
            text-decoration: none;
        }
        .nav-links a:hover {
            background: var(--color-primary-bg);
            color: var(--color-primary);
        }
        .nav-links a.active {
            background: var(--color-primary);
            color: #fff;
            font-weight: 600;
            box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
        }
        .nav-links a.active:hover {
            background: var(--color-primary-dark);
            color: #fff;
        }
        .nav-cta-btn {
            background: var(--color-accent) !important;
            color: #1e293b !important;
            font-weight: 600 !important;
            box-shadow: 0 2px 8px rgba(245, 158, 11, 0.3);
        }
        .nav-cta-btn:hover {
            background: var(--color-accent-light) !important;
            color: #1e293b !important;
            box-shadow: 0 4px 14px rgba(245, 158, 11, 0.4);
            transform: translateY(-1px);
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            padding: 8px;
            cursor: pointer;
            z-index: 1001;
        }
        .nav-toggle span {
            display: block;
            width: 24px;
            height: 2.5px;
            background: var(--color-text);
            border-radius: 2px;
            transition: all var(--transition-fast);
        }
        .nav-toggle.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        @media (max-width: 768px) {
            .nav-toggle {
                display: flex;
            }
            .nav-links {
                position: absolute;
                top: 100%;
                left: 16px;
                right: 16px;
                flex-direction: column;
                background: #fff;
                border-radius: var(--radius-lg);
                box-shadow: var(--shadow-lg);
                padding: 12px;
                gap: 2px;
                opacity: 0;
                visibility: hidden;
                transform: translateY(-8px);
                transition: all var(--transition-normal);
                z-index: 1000;
            }
            .nav-links.open {
                opacity: 1;
                visibility: visible;
                transform: translateY(8px);
            }
            .nav-links a {
                width: 100%;
                padding: 12px 16px;
                border-radius: var(--radius-md);
                justify-content: center;
                font-size: 1rem;
            }
            .nav-capsule {
                padding: 8px 16px;
                position: relative;
            }
        }

        /* ========== ARTICLE BANNER ========== */
        .article-banner {
            position: relative;
            height: 280px;
            background: linear-gradient(135deg, #1e3a5f 0%, #1a56db 40%, #2563eb 70%, #3b82f6 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
            margin-top: -80px;
            padding-top: 80px;
        }
        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center / cover no-repeat;
            opacity: 0.25;
            mix-blend-mode: overlay;
        }
        .article-banner::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 80px;
            background: linear-gradient(to top, var(--color-bg), transparent);
        }
        .article-banner-content {
            position: relative;
            z-index: 2;
            text-align: center;
            color: #fff;
            padding: 0 var(--space-sm);
        }
        .article-banner-category {
            display: inline-block;
            background: rgba(255, 255, 255, 0.2);
            backdrop-filter: blur(6px);
            border: 1px solid rgba(255, 255, 255, 0.3);
            padding: 6px 16px;
            border-radius: var(--radius-full);
            font-size: 0.85rem;
            font-weight: 500;
            letter-spacing: 0.5px;
            margin-bottom: 8px;
        }
        .article-banner h1 {
            font-size: 2rem;
            font-weight: 700;
            letter-spacing: -0.3px;
            line-height: 1.3;
            max-width: 700px;
            margin: 0 auto;
            text-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
        }
        @media (max-width: 768px) {
            .article-banner {
                height: 220px;
                margin-top: -60px;
                padding-top: 60px;
            }
            .article-banner h1 {
                font-size: 1.4rem;
            }
        }
        @media (max-width: 520px) {
            .article-banner {
                height: 180px;
                margin-top: -50px;
                padding-top: 50px;
            }
            .article-banner h1 {
                font-size: 1.2rem;
            }
        }

        /* ========== BREADCRUMB ========== */
        .breadcrumb-wrap {
            background: var(--color-surface);
            border-bottom: 1px solid var(--color-border-light);
            padding: 14px 0;
            position: sticky;
            top: 72px;
            z-index: 50;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
            font-size: 0.9rem;
            color: var(--color-text-weak);
        }
        .breadcrumb a {
            color: var(--color-text-weak);
            transition: color var(--transition-fast);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            color: var(--color-primary);
        }
        .breadcrumb .separator {
            color: var(--color-text-muted);
            font-size: 0.75rem;
        }
        .breadcrumb .current {
            color: var(--color-text-strong);
            font-weight: 600;
            max-width: 360px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }
        @media (max-width: 768px) {
            .breadcrumb-wrap {
                top: 60px;
            }
            .breadcrumb {
                font-size: 0.82rem;
            }
        }

        /* ========== MAIN CONTENT ========== */
        .article-main {
            flex: 1;
            padding: var(--space-xl) 0 var(--space-2xl);
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: var(--space-lg);
            align-items: start;
        }
        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: 1fr;
            }
        }

        /* ========== ARTICLE CARD ========== */
        .article-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            overflow: hidden;
        }
        .article-cover {
            width: 100%;
            aspect-ratio: 16 / 7;
            object-fit: cover;
            display: block;
            border-bottom: 1px solid var(--color-border-light);
        }
        .article-body {
            padding: var(--space-lg);
        }
        .article-meta {
            display: flex;
            align-items: center;
            gap: var(--space-sm);
            flex-wrap: wrap;
            margin-bottom: var(--space-md);
            padding-bottom: var(--space-md);
            border-bottom: 1px solid var(--color-border-light);
        }
        .article-meta-tag {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            background: var(--color-primary-bg);
            color: var(--color-primary);
            padding: 5px 12px;
            border-radius: var(--radius-full);
            font-size: 0.82rem;
            font-weight: 600;
        }
        .article-meta-time {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            color: var(--color-text-weak);
            font-size: 0.85rem;
        }
        .article-content {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--color-text);
        }
        .article-content h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--color-text-strong);
            margin: var(--space-lg) 0 var(--space-sm);
            padding-top: var(--space-sm);
            border-top: 2px solid var(--color-border-light);
        }
        .article-content h3 {
            font-size: 1.25rem;
            font-weight: 600;
            color: var(--color-text-strong);
            margin: var(--space-md) 0 var(--space-xs);
        }
        .article-content p {
            margin-bottom: var(--space-sm);
        }
        .article-content ul,
        .article-content ol {
            margin: var(--space-sm) 0;
            padding-left: 1.5em;
        }
        .article-content li {
            margin-bottom: 6px;
        }
        .article-content blockquote {
            border-left: 4px solid var(--color-primary);
            background: var(--color-primary-bg);
            padding: var(--space-sm) var(--space-md);
            margin: var(--space-md) 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--color-text);
            font-style: italic;
        }
        .article-content img {
            border-radius: var(--radius-md);
            margin: var(--space-md) auto;
        }
        .article-content strong {
            color: var(--color-text-strong);
        }
        .article-content a {
            text-decoration: underline;
            text-underline-offset: 3px;
        }

        /* ========== SIDEBAR ========== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: var(--space-md);
            position: sticky;
            top: 140px;
        }
        @media (max-width: 1024px) {
            .article-sidebar {
                position: static;
                flex-direction: row;
                flex-wrap: wrap;
                gap: var(--space-sm);
            }
            .article-sidebar>* {
                flex: 1 1 240px;
            }
        }
        .sidebar-card {
            background: var(--color-surface);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-xs);
            border: 1px solid var(--color-border-light);
            padding: var(--space-md);
        }
        .sidebar-card h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--color-text-strong);
            margin-bottom: var(--space-sm);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .sidebar-card p {
            font-size: 0.9rem;
            color: var(--color-text-weak);
            line-height: 1.6;
        }
        .sidebar-card .btn-sm {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: var(--space-xs);
            padding: 8px 16px;
            background: var(--color-primary);
            color: #fff;
            border-radius: var(--radius-full);
            font-size: 0.85rem;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: all var(--transition-fast);
            text-decoration: none;
        }
        .sidebar-card .btn-sm:hover {
            background: var(--color-primary-dark);
            box-shadow: var(--shadow-sm);
            transform: translateY(-1px);
            color: #fff;
        }
        .sidebar-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }
        .sidebar-tag {
            padding: 5px 10px;
            background: var(--color-bg);
            border-radius: var(--radius-full);
            font-size: 0.78rem;
            color: var(--color-text-weak);
            border: 1px solid var(--color-border);
            transition: all var(--transition-fast);
            text-decoration: none;
        }
        .sidebar-tag:hover {
            background: var(--color-primary-bg);
            color: var(--color-primary);
            border-color: var(--color-primary-light);
        }

        /* ========== NOT FOUND ========== */
        .not-found-card {
            text-align: center;
            padding: var(--space-2xl) var(--space-lg);
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
        }
        .not-found-icon {
            font-size: 4rem;
            color: var(--color-text-muted);
            margin-bottom: var(--space-md);
        }
        .not-found-card h2 {
            font-size: 1.6rem;
            color: var(--color-text-strong);
            margin-bottom: var(--space-sm);
        }
        .not-found-card p {
            color: var(--color-text-weak);
            margin-bottom: var(--space-lg);
            max-width: 480px;
            margin-left: auto;
            margin-right: auto;
        }
        .not-found-card .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            background: var(--color-primary);
            color: #fff;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 1rem;
            border: none;
            cursor: pointer;
            transition: all var(--transition-fast);
            text-decoration: none;
        }
        .not-found-card .btn-back:hover {
            background: var(--color-primary-dark);
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
            color: #fff;
        }

        /* ========== CTA SECTION ========== */
        .cta-section {
            padding: var(--space-2xl) 0;
            background: linear-gradient(135deg, var(--color-primary-bg) 0%, #f0f9ff 50%, #eef2ff 100%);
            border-top: 1px solid var(--color-border-light);
        }
        .cta-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            padding: var(--space-xl);
            text-align: center;
            max-width: 700px;
            margin: 0 auto;
            border: 1px solid var(--color-border-light);
        }
        .cta-card h3 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--color-text-strong);
            margin-bottom: var(--space-xs);
        }
        .cta-card p {
            color: var(--color-text-weak);
            margin-bottom: var(--space-lg);
            font-size: 1rem;
        }
        .cta-buttons {
            display: flex;
            gap: var(--space-sm);
            justify-content: center;
            flex-wrap: wrap;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 30px;
            background: var(--color-primary);
            color: #fff;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 1rem;
            border: none;
            cursor: pointer;
            transition: all var(--transition-fast);
            text-decoration: none;
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
        }
        .btn-primary:hover {
            background: var(--color-primary-dark);
            box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 30px;
            background: transparent;
            color: var(--color-primary);
            border: 2px solid var(--color-primary);
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: all var(--transition-fast);
            text-decoration: none;
        }
        .btn-outline:hover {
            background: var(--color-primary-bg);
            border-color: var(--color-primary-dark);
            color: var(--color-primary-dark);
        }

        /* ========== FAQ ========== */
        .faq-section {
            padding: var(--space-2xl) 0;
            background: var(--color-surface);
        }
        .section-title {
            text-align: center;
            font-size: 1.7rem;
            font-weight: 700;
            color: var(--color-text-strong);
            margin-bottom: var(--space-xs);
            letter-spacing: -0.3px;
        }
        .section-subtitle {
            text-align: center;
            color: var(--color-text-weak);
            margin-bottom: var(--space-xl);
            font-size: 1rem;
        }
        .faq-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
            gap: var(--space-md);
            max-width: 900px;
            margin: 0 auto;
        }
        @media (max-width: 520px) {
            .faq-grid {
                grid-template-columns: 1fr;
            }
        }
        .faq-item {
            background: var(--color-bg);
            border-radius: var(--radius-md);
            padding: var(--space-md);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-fast);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-sm);
            border-color: var(--color-border);
        }
        .faq-item h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-text-strong);
            margin-bottom: 6px;
            display: flex;
            align-items: flex-start;
            gap: 8px;
        }
        .faq-item h4 .faq-q {
            color: var(--color-primary);
            font-weight: 700;
            flex-shrink: 0;
        }
        .faq-item p {
            font-size: 0.9rem;
            color: var(--color-text-weak);
            line-height: 1.6;
            padding-left: 24px;
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: #1e293b;
            color: #cbd5e1;
            padding: var(--space-2xl) 0 var(--space-lg);
            margin-top: auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: var(--space-xl);
            margin-bottom: var(--space-xl);
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }
        .footer-brand-name {
            font-size: 1.3rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: var(--space-xs);
        }
        .footer-desc {
            font-size: 0.9rem;
            line-height: 1.7;
            color: #94a3b8;
        }
        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #e2e8f0;
            margin-bottom: var(--space-sm);
        }
        .footer-col a {
            display: block;
            color: #94a3b8;
            font-size: 0.9rem;
            padding: 4px 0;
            transition: color var(--transition-fast);
            text-decoration: none;
        }
        .footer-col a:hover {
            color: #fff;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: var(--space-md);
            text-align: center;
            font-size: 0.85rem;
            color: #64748b;
        }

        /* ========== UTILITY ========== */
        .text-center {
            text-align: center;
        }
        .mt-0 {
            margin-top: 0;
        }
        .mb-0 {
            margin-bottom: 0;
        }
        @media (max-width: 768px) {
            .article-body {
                padding: var(--space-md);
            }
            .article-content {
                font-size: 1rem;
            }
            .cta-card {
                padding: var(--space-lg) var(--space-md);
            }
        }

/* roulang page: category1 */
/* ============ 设计变量 ============ */
        :root {
            /* 主色系 - 深蓝专业感 */
            --color-primary: #1e40af;
            --color-primary-light: #2563eb;
            --color-primary-lighter: #3b82f6;
            --color-primary-dark: #1a3596;
            --color-primary-surface: #eef2ff;
            --color-primary-glow: rgba(30, 64, 175, 0.12);
            /* 辅色 - 暖金点缀 */
            --color-accent: #f59e0b;
            --color-accent-light: #fbbf24;
            --color-accent-dark: #d97706;
            --color-accent-surface: #fffbeb;
            /* 背景 */
            --color-bg: #f8fafc;
            --color-bg-white: #ffffff;
            --color-bg-soft: #f1f5f9;
            --color-bg-card: #ffffff;
            /* 文字 */
            --color-text: #1e293b;
            --color-text-strong: #0f172a;
            --color-text-soft: #64748b;
            --color-text-muted: #94a3b8;
            --color-text-inverse: #ffffff;
            /* 边框 */
            --color-border: #e2e8f0;
            --color-border-light: #f1f5f9;
            --color-border-focus: #3b82f6;
            /* 圆角 */
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-full: 9999px;
            /* 阴影 */
            --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 12px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.04);
            --shadow-lg: 0 10px 25px rgba(0,0,0,0.09), 0 4px 8px rgba(0,0,0,0.04);
            --shadow-xl: 0 20px 40px rgba(0,0,0,0.11), 0 8px 16px rgba(0,0,0,0.05);
            --shadow-card-hover: 0 16px 32px rgba(0,0,0,0.10), 0 6px 12px rgba(0,0,0,0.05);
            --shadow-nav: 0 2px 20px rgba(0,0,0,0.08), 0 0 0 1px rgba(0,0,0,0.03);
            /* 间距 */
            --space-section: 80px;
            --space-block: 48px;
            --space-element: 24px;
            --space-tight: 16px;
            --space-xs: 8px;
            /* 字体 */
            --font-sans: 'Segoe UI', system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --font-mono: 'SF Mono', 'Cascadia Code', 'Consolas', monospace;
            /* 过渡 */
            --transition-fast: 0.15s ease;
            --transition-base: 0.25s ease;
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            /* 胶囊导航 */
            --nav-capsule-bg: rgba(255,255,255,0.92);
            --nav-capsule-blur: 18px;
            --nav-height: 56px;
        }

        /* ============ Reset & Base ============ */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; font-size: 16px; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
        body {
            font-family: var(--font-sans);
            line-height: 1.7;
            color: var(--color-text);
            background: var(--color-bg);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a { text-decoration: none; color: inherit; transition: color var(--transition-fast); }
        img { max-width: 100%; height: auto; display: block; }
        button { cursor: pointer; font-family: inherit; border: none; background: none; }
        input, textarea { font-family: inherit; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; color: var(--color-text-strong); font-weight: 700; }

        /* ============ 容器 ============ */
        .container {
            width: 100%;
            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 & 悬浮胶囊导航 ============ */
        .site-header {
            position: sticky;
            top: 16px;
            z-index: 1000;
            padding: 0 16px;
            pointer-events: none;
        }
        .nav-capsule {
            max-width: 1100px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            gap: 32px;
            padding: 8px 20px;
            background: var(--nav-capsule-bg);
            backdrop-filter: blur(var(--nav-capsule-blur));
            -webkit-backdrop-filter: blur(var(--nav-capsule-blur));
            border-radius: var(--radius-full);
            box-shadow: var(--shadow-nav);
            border: 1px solid rgba(255,255,255,0.6);
            pointer-events: auto;
            transition: all var(--transition-smooth);
        }
        .nav-capsule.scrolled {
            box-shadow: var(--shadow-lg);
            background: rgba(255,255,255,0.96);
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.15rem;
            color: var(--color-text-strong);
            white-space: nowrap;
            flex-shrink: 0;
            transition: color var(--transition-fast);
        }
        .nav-logo:hover { color: var(--color-primary-light); }
        .nav-logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
            color: #fff;
            font-weight: 900;
            font-size: 1.25rem;
            letter-spacing: -0.5px;
            flex-shrink: 0;
            box-shadow: 0 2px 8px rgba(30,64,175,0.25);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            margin-left: auto;
            flex-wrap: nowrap;
        }
        .nav-links a {
            padding: 10px 18px;
            border-radius: var(--radius-full);
            font-size: 0.925rem;
            font-weight: 500;
            color: var(--color-text-soft);
            transition: all var(--transition-base);
            white-space: nowrap;
            position: relative;
        }
        .nav-links a:hover {
            color: var(--color-primary);
            background: var(--color-primary-surface);
        }
        .nav-links a.active {
            color: var(--color-primary);
            background: var(--color-primary-surface);
            font-weight: 600;
        }
        .nav-links a.nav-cta-btn {
            background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
            color: #fff;
            font-weight: 600;
            padding: 10px 20px;
            box-shadow: 0 2px 10px rgba(30,64,175,0.25);
            transition: all var(--transition-smooth);
        }
        .nav-links a.nav-cta-btn:hover {
            box-shadow: 0 4px 18px rgba(30,64,175,0.35);
            transform: translateY(-1px);
            background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
            color: #fff;
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: var(--radius-sm);
            cursor: pointer;
            z-index: 1001;
            margin-left: auto;
            pointer-events: auto;
        }
        .nav-toggle span {
            display: block;
            width: 24px;
            height: 2.5px;
            background: var(--color-text-strong);
            border-radius: 3px;
            transition: all var(--transition-base);
            transform-origin: center;
        }
        .nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5.5px); }
        .nav-toggle.active span:nth-child(2) { opacity: 0; transform: scaleX(0); }
        .nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5.5px); }

        @media (max-width: 768px) {
            .site-header { top: 10px; padding: 0 10px; }
            .nav-capsule { padding: 6px 14px; gap: 12px; }
            .nav-logo { font-size: 1rem; }
            .nav-logo-icon { width: 32px; height: 32px; font-size: 1rem; }
            .nav-toggle { display: flex; }
            .nav-links {
                position: fixed;
                top: 0;
                right: -100%;
                width: 280px;
                height: 100vh;
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
                padding: 90px 20px 30px;
                background: rgba(255,255,255,0.97);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                box-shadow: var(--shadow-xl);
                transition: right var(--transition-smooth);
                z-index: 1000;
                margin-left: 0;
            }
            .nav-links.open { right: 0; }
            .nav-links a {
                padding: 14px 18px;
                border-radius: var(--radius-md);
                font-size: 1rem;
                text-align: left;
            }
            .nav-links a.nav-cta-btn {
                text-align: center;
                margin-top: 8px;
            }
        }

        /* ============ 面包屑 ============ */
        .breadcrumb-bar {
            padding: 28px 0 8px;
            margin-top: 8px;
        }
        .breadcrumb-list {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.875rem;
            color: var(--color-text-soft);
            flex-wrap: wrap;
        }
        .breadcrumb-list a {
            color: var(--color-text-soft);
            transition: color var(--transition-fast);
        }
        .breadcrumb-list a:hover { color: var(--color-primary); }
        .breadcrumb-sep {
            color: var(--color-text-muted);
            user-select: none;
        }
        .breadcrumb-current {
            color: var(--color-text);
            font-weight: 600;
        }

        /* ============ 分类页头 Banner ============ */
        .category-hero {
            position: relative;
            padding: 56px 0 52px;
            background: linear-gradient(170deg, #eef2ff 0%, #f8fafc 40%, #ffffff 100%);
            border-radius: 0 0 var(--radius-xl) var(--radius-xl);
            overflow: hidden;
            margin-bottom: var(--space-section);
        }
        .category-hero::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -80px;
            width: 360px;
            height: 360px;
            background: radial-gradient(circle, rgba(30,64,175,0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .category-hero::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: -60px;
            width: 260px;
            height: 260px;
            background: radial-gradient(circle, rgba(245,158,11,0.05) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .category-hero-inner {
            position: relative;
            z-index: 1;
            display: flex;
            align-items: center;
            gap: 48px;
        }
        .category-hero-text { flex: 1; }
        .category-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            background: var(--color-primary-surface);
            color: var(--color-primary);
            border-radius: var(--radius-full);
            font-size: 0.825rem;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .category-hero h1 {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--color-text-strong);
            margin-bottom: 12px;
            letter-spacing: -0.5px;
        }
        .category-hero .hero-subtitle {
            font-size: 1.1rem;
            color: var(--color-text-soft);
            max-width: 560px;
            line-height: 1.7;
        }
        .category-hero-stats {
            display: flex;
            gap: 32px;
            margin-top: 24px;
            flex-wrap: wrap;
        }
        .hero-stat-item {
            display: flex;
            flex-direction: column;
        }
        .hero-stat-num {
            font-size: 1.75rem;
            font-weight: 800;
            color: var(--color-primary);
            letter-spacing: -0.5px;
        }
        .hero-stat-label {
            font-size: 0.85rem;
            color: var(--color-text-muted);
        }
        .category-hero-image {
            flex-shrink: 0;
            width: 280px;
            height: 200px;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            background: #e2e8f0;
        }
        .category-hero-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        @media (max-width: 768px) {
            .category-hero { padding: 40px 0 36px; border-radius: 0 0 var(--radius-md) var(--radius-md); margin-bottom: 48px; }
            .category-hero-inner { flex-direction: column; gap: 24px; text-align: center; }
            .category-hero h1 { font-size: 1.85rem; }
            .category-hero .hero-subtitle { max-width: 100%; font-size: 1rem; }
            .category-hero-stats { justify-content: center; gap: 24px; }
            .category-hero-image { width: 100%; max-width: 340px; height: 160px; margin: 0 auto; }
            .hero-stat-num { font-size: 1.4rem; }
        }

        /* ============ 板块通用 ============ */
        main { flex: 1; }
        .section { padding: var(--space-section) 0; }
        .section-header {
            text-align: center;
            margin-bottom: var(--space-block);
        }
        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 2px;
            color: var(--color-primary);
            background: var(--color-primary-surface);
            padding: 5px 14px;
            border-radius: var(--radius-full);
            margin-bottom: 12px;
        }
        .section-title {
            font-size: 2rem;
            font-weight: 800;
            color: var(--color-text-strong);
            margin-bottom: 8px;
            letter-spacing: -0.3px;
        }
        .section-desc {
            font-size: 1rem;
            color: var(--color-text-soft);
            max-width: 600px;
            margin: 0 auto;
        }
        @media (max-width: 768px) {
            .section { padding: 48px 0; }
            .section-title { font-size: 1.5rem; }
            .section-header { margin-bottom: 32px; }
        }

        /* ============ 指南文章网格 ============ */
        .articles-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .article-card {
            background: var(--color-bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-smooth);
            display: flex;
            flex-direction: column;
        }
        .article-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
            border-color: var(--color-border);
        }
        .article-card-image {
            position: relative;
            width: 100%;
            height: 180px;
            overflow: hidden;
            background: #e2e8f0;
        }
        .article-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-smooth);
        }
        .article-card:hover .article-card-image img {
            transform: scale(1.04);
        }
        .article-card-tags {
            position: absolute;
            top: 12px;
            left: 12px;
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
        }
        .article-tag {
            padding: 4px 10px;
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(6px);
            border-radius: var(--radius-full);
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--color-primary);
            white-space: nowrap;
            box-shadow: var(--shadow-xs);
        }
        .article-card-body {
            padding: 18px 20px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .article-card-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--color-text-strong);
            line-height: 1.4;
        }
        .article-card-body h3 a {
            color: inherit;
            transition: color var(--transition-fast);
        }
        .article-card-body h3 a:hover { color: var(--color-primary); }
        .article-card-excerpt {
            font-size: 0.875rem;
            color: var(--color-text-soft);
            line-height: 1.6;
            flex: 1;
            margin-bottom: 12px;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .article-card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.8rem;
            color: var(--color-text-muted);
            padding-top: 10px;
            border-top: 1px solid var(--color-border-light);
        }
        .article-card-link {
            font-weight: 600;
            color: var(--color-primary);
            font-size: 0.85rem;
            transition: color var(--transition-fast);
        }
        .article-card-link:hover { color: var(--color-primary-dark); }
        @media (max-width: 1024px) {
            .articles-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
        }
        @media (max-width: 600px) {
            .articles-grid { grid-template-columns: 1fr; gap: 16px; }
            .article-card-image { height: 200px; }
        }

        /* ============ 步骤流程板块 ============ */
        .bg-soft { background: var(--color-bg-soft); }
        .steps-list {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step-counter;
        }
        .step-item {
            background: var(--color-bg-card);
            border-radius: var(--radius-lg);
            padding: 28px 22px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            position: relative;
            transition: all var(--transition-smooth);
        }
        .step-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
            color: #fff;
            font-size: 1.3rem;
            font-weight: 800;
            margin-bottom: 14px;
            box-shadow: 0 4px 12px rgba(30,64,175,0.25);
        }
        .step-item h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--color-text-strong);
        }
        .step-item p {
            font-size: 0.85rem;
            color: var(--color-text-soft);
            line-height: 1.6;
        }
        @media (max-width: 1024px) {
            .steps-list { grid-template-columns: repeat(2, 1fr); gap: 20px; }
        }
        @media (max-width: 520px) {
            .steps-list { grid-template-columns: 1fr; gap: 14px; }
        }

        /* ============ 数据亮点板块 ============ */
        .data-showcase-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .data-card {
            background: var(--color-bg-card);
            border-radius: var(--radius-lg);
            padding: 28px 20px;
            text-align: center;
            border: 1px solid var(--color-border-light);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-smooth);
        }
        .data-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
            border-color: var(--color-primary-lighter);
        }
        .data-card-icon {
            font-size: 2rem;
            margin-bottom: 10px;
        }
        .data-card-value {
            font-size: 2rem;
            font-weight: 800;
            color: var(--color-primary);
            letter-spacing: -1px;
        }
        .data-card-label {
            font-size: 0.85rem;
            color: var(--color-text-soft);
            margin-top: 4px;
        }
        @media (max-width: 768px) {
            .data-showcase-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
            .data-card { padding: 20px 14px; }
            .data-card-value { font-size: 1.4rem; }
        }
        @media (max-width: 480px) {
            .data-showcase-grid { grid-template-columns: 1fr; }
        }

        /* ============ FAQ 板块 ============ */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--color-bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border-light);
            overflow: hidden;
            transition: all var(--transition-base);
            box-shadow: var(--shadow-xs);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-sm);
            border-color: var(--color-border);
        }
        .faq-question {
            width: 100%;
            text-align: left;
            padding: 18px 22px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-text-strong);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            transition: color var(--transition-fast);
            cursor: pointer;
            background: none;
            border: none;
        }
        .faq-question:hover { color: var(--color-primary); }
        .faq-icon {
            flex-shrink: 0;
            font-size: 1.2rem;
            color: var(--color-text-muted);
            transition: transform var(--transition-base);
        }
        .faq-item.open .faq-icon { transform: rotate(45deg); color: var(--color-primary); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-smooth), padding var(--transition-base);
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
        }
        .faq-answer-inner {
            padding: 0 22px 18px;
            font-size: 0.925rem;
            color: var(--color-text-soft);
            line-height: 1.7;
        }

        /* ============ CTA 板块 ============ */
        .cta-section-inner {
            background: linear-gradient(135deg, #1e40af 0%, #1a3596 40%, #0f2557 100%);
            border-radius: var(--radius-xl);
            padding: 56px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }
        .cta-section-inner::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -60px;
            width: 320px;
            height: 320px;
            background: radial-gradient(circle, rgba(255,255,255,0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-section-inner::after {
            content: '';
            position: absolute;
            bottom: -50px;
            left: -40px;
            width: 240px;
            height: 240px;
            background: radial-gradient(circle, rgba(245,158,11,0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-section-inner > * { position: relative; z-index: 1; }
        .cta-section-inner h2 {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 8px;
            letter-spacing: -0.3px;
        }
        .cta-section-inner p {
            font-size: 1.05rem;
            color: rgba(255,255,255,0.8);
            max-width: 540px;
            margin: 0 auto 28px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 28px;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 1rem;
            transition: all var(--transition-smooth);
            cursor: pointer;
            border: none;
        }
        .btn-accent {
            background: var(--color-accent);
            color: #1a1a1a;
            box-shadow: 0 4px 16px rgba(245,158,11,0.35);
        }
        .btn-accent:hover {
            background: var(--color-accent-light);
            box-shadow: 0 6px 22px rgba(245,158,11,0.45);
            transform: translateY(-2px);
        }
        .btn-outline-white {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255,255,255,0.4);
            padding: 12px 26px;
        }
        .btn-outline-white:hover {
            background: rgba(255,255,255,0.1);
            border-color: rgba(255,255,255,0.7);
        }
        .cta-buttons { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
        @media (max-width: 768px) {
            .cta-section-inner { padding: 40px 24px; border-radius: var(--radius-lg); }
            .cta-section-inner h2 { font-size: 1.5rem; }
            .cta-section-inner p { font-size: 0.95rem; }
            .btn { padding: 12px 22px; font-size: 0.9rem; }
        }

        /* ============ Footer ============ */
        .site-footer {
            background: #0f172a;
            color: rgba(255,255,255,0.75);
            padding: 56px 0 24px;
            margin-top: auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }
        .footer-brand-name {
            font-size: 1.25rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 8px;
            letter-spacing: -0.3px;
        }
        .footer-desc {
            font-size: 0.9rem;
            line-height: 1.6;
            color: rgba(255,255,255,0.55);
            max-width: 340px;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 14px;
        }
        .footer-col a {
            display: block;
            font-size: 0.875rem;
            color: rgba(255,255,255,0.55);
            padding: 5px 0;
            transition: color var(--transition-fast);
        }
        .footer-col a:hover { color: #fff; }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 20px;
            text-align: center;
            font-size: 0.825rem;
            color: rgba(255,255,255,0.4);
        }
        @media (max-width: 768px) {
            .site-footer { padding: 40px 0 20px; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; text-align: center; }
            .footer-desc { max-width: 100%; margin: 0 auto; }
        }

        /* ============ 移动端遮罩 ============ */
        .mobile-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0,0,0,0.35);
            z-index: 999;
            opacity: 0;
            transition: opacity var(--transition-base);
        }
        .mobile-overlay.show { display: block; opacity: 1; }

        /* ============ 辅助类 ============ */
        .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }
        .text-center { text-align: center; }