/* roulang page: index */
:root {
            --primary: #1a3a5c;
            --primary-light: #2a5a8c;
            --primary-lighter: #4a8abf;
            --accent: #e8a838;
            --accent-light: #f5c45a;
            --accent-dark: #c98a1e;
            --bg: #f8f9fb;
            --bg-card: #ffffff;
            --bg-dark: #0f1e2f;
            --text: #1f2a3a;
            --text-light: #5a6a7a;
            --text-lighter: #8a9aaa;
            --border: #e2e6ed;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-lg: 24px;
            --shadow: 0 4px 20px rgba(26, 58, 92, 0.08);
            --shadow-hover: 0 12px 40px rgba(26, 58, 92, 0.14);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --max-width: 1200px;
            --nav-height: 68px;
        }

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

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

        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            padding-top: calc(var(--nav-height) + 24px);
        }

        a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--accent); }

        img { max-width: 100%; height: auto; display: block; }
        ul, ol { list-style: none; }
        button, input, textarea { font-family: inherit; font-size: inherit; outline: none; border: none; }
        button { cursor: pointer; background: none; }

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

        @media (max-width: 768px) {
            .container { padding: 0 16px; }
        }

        /* ===== Navigation (Floating Dock) ===== */
        .site-header {
            position: fixed;
            top: 16px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 1000;
            width: calc(100% - 48px);
            max-width: 900px;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(16px) saturate(180%);
            -webkit-backdrop-filter: blur(16px) saturate(180%);
            border-radius: 60px;
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.06), 0 1px 0 rgba(255, 255, 255, 0.8) inset;
            border: 1px solid rgba(255, 255, 255, 0.6);
            padding: 0 8px;
            height: var(--nav-height);
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .site-header .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            padding: 0 12px;
        }

        .site-logo {
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.3px;
            white-space: nowrap;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .site-logo:hover { opacity: 0.85; }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .nav-links a {
            padding: 6px 18px;
            border-radius: 40px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-light);
            transition: var(--transition);
            position: relative;
            white-space: nowrap;
        }
        .nav-links a:hover { color: var(--primary); background: rgba(26, 58, 92, 0.06); }
        .nav-links a.active {
            color: #fff;
            background: var(--primary);
            box-shadow: 0 2px 12px rgba(26, 58, 92, 0.2);
        }
        .nav-links a.active:hover { background: var(--primary-light); color: #fff; }

        .nav-cta {
            background: linear-gradient(135deg, var(--accent), var(--accent-dark)) !important;
            color: #fff !important;
            padding: 6px 22px !important;
            border-radius: 40px !important;
            font-weight: 600 !important;
            box-shadow: 0 4px 14px rgba(232, 168, 56, 0.3);
        }
        .nav-cta:hover { transform: translateY(-1px); box-shadow: 0 6px 20px rgba(232, 168, 56, 0.4); }

        .mobile-toggle { display: none; background: none; border: none; font-size: 22px; color: var(--primary); padding: 4px 8px; border-radius: 8px; cursor: pointer; }

        @media (max-width: 768px) {
            .site-header { top: 12px; width: calc(100% - 24px); border-radius: 40px; }
            .nav-links { display: none; flex-direction: column; position: absolute; top: calc(100% + 8px); left: 8px; right: 8px; background: rgba(255,255,255,0.96); backdrop-filter: blur(20px); border-radius: 24px; padding: 16px; box-shadow: 0 20px 60px rgba(0,0,0,0.12); border: 1px solid var(--border); }
            .nav-links.open { display: flex; }
            .nav-links a { padding: 10px 16px; width: 100%; text-align: center; font-size: 15px; }
            .mobile-toggle { display: block; }
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            padding: 80px 0 100px;
            background: var(--bg-dark);
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center center;
            background-blend-mode: overlay;
            isolation: isolate;
            overflow: hidden;
            border-radius: 0 0 var(--radius-lg) var(--radius-lg);
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,30,47,0.88) 0%, rgba(26,58,92,0.78) 100%);
            z-index: 0;
        }
        .hero .container { position: relative; z-index: 1; text-align: center; }
        .hero-badge {
            display: inline-block;
            background: rgba(232, 168, 56, 0.2);
            border: 1px solid rgba(232, 168, 56, 0.3);
            color: var(--accent-light);
            padding: 6px 20px;
            border-radius: 60px;
            font-size: 13px;
            font-weight: 500;
            letter-spacing: 0.3px;
            margin-bottom: 24px;
            backdrop-filter: blur(4px);
        }
        .hero h1 {
            font-size: clamp(36px, 6vw, 64px);
            font-weight: 800;
            line-height: 1.15;
            color: #fff;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }
        .hero h1 span { background: linear-gradient(135deg, var(--accent-light), #f5d080); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .hero p {
            font-size: clamp(16px, 2vw, 20px);
            color: rgba(255,255,255,0.8);
            max-width: 680px;
            margin: 0 auto 36px;
            line-height: 1.7;
        }
        .hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 34px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 16px;
            transition: var(--transition);
            border: none;
            cursor: pointer;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: #fff;
            box-shadow: 0 6px 24px rgba(232, 168, 56, 0.35);
        }
        .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 32px rgba(232, 168, 56, 0.45); color: #fff; }
        .btn-outline {
            background: transparent;
            border: 1.5px solid rgba(255,255,255,0.4);
            color: #fff;
        }
        .btn-outline:hover { background: rgba(255,255,255,0.1); border-color: rgba(255,255,255,0.7); color: #fff; }

        .hero-stats {
            display: flex;
            justify-content: center;
            gap: 40px;
            margin-top: 48px;
            padding-top: 40px;
            border-top: 1px solid rgba(255,255,255,0.1);
        }
        .hero-stats .stat { text-align: center; }
        .hero-stats .stat-num { font-size: 28px; font-weight: 700; color: #fff; }
        .hero-stats .stat-label { font-size: 13px; color: rgba(255,255,255,0.6); margin-top: 2px; }
        @media (max-width: 768px) {
            .hero { padding: 60px 0 70px; }
            .hero-stats { gap: 24px; flex-wrap: wrap; }
            .hero-stats .stat-num { font-size: 22px; }
        }

        /* ===== Section Common ===== */
        .section { padding: 80px 0; }
        .section-alt { background: var(--bg-card); }
        .section-dark { background: var(--bg-dark); color: #fff; }
        .section-header { text-align: center; margin-bottom: 52px; }
        .section-header h2 {
            font-size: clamp(28px, 3.8vw, 40px);
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.3px;
            margin-bottom: 14px;
        }
        .section-header p {
            font-size: 17px;
            color: var(--text-light);
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.7;
        }
        .section-dark .section-header h2 { color: #fff; }
        .section-dark .section-header p { color: rgba(255,255,255,0.7); }

        .tag {
            display: inline-block;
            background: rgba(232, 168, 56, 0.12);
            color: var(--accent-dark);
            padding: 4px 14px;
            border-radius: 60px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.3px;
            margin-bottom: 16px;
        }
        .section-dark .tag { background: rgba(232, 168, 56, 0.18); color: var(--accent-light); }

        /* ===== Features / 核心优势 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 28px;
        }
        .feature-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 36px 28px;
            box-shadow: var(--shadow);
            transition: var(--transition);
            border: 1px solid var(--border);
            text-align: center;
        }
        .feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
        .feature-card .icon {
            width: 56px; height: 56px;
            border-radius: 16px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            display: flex; align-items: center; justify-content: center;
            margin: 0 auto 20px;
            color: #fff;
            font-size: 24px;
        }
        .feature-card h3 { font-size: 19px; font-weight: 700; margin-bottom: 10px; color: var(--primary); }
        .feature-card p { font-size: 15px; color: var(--text-light); line-height: 1.7; }

        /* ===== Process / 使用流程 ===== */
        .process-steps {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 32px;
            counter-reset: step;
        }
        .process-step {
            flex: 1 1 180px;
            max-width: 240px;
            text-align: center;
            position: relative;
        }
        .process-step::after {
            content: '→';
            position: absolute;
            right: -22px;
            top: 30px;
            font-size: 24px;
            color: var(--text-lighter);
        }
        .process-step:last-child::after { display: none; }
        .process-step .num {
            width: 52px; height: 52px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: #fff;
            font-size: 22px; font-weight: 700;
            display: flex; align-items: center; justify-content: center;
            margin: 0 auto 16px;
            box-shadow: 0 4px 16px rgba(232, 168, 56, 0.25);
        }
        .process-step h4 { font-size: 17px; font-weight: 600; color: var(--primary); margin-bottom: 6px; }
        .process-step p { font-size: 14px; color: var(--text-light); }

        @media (max-width: 768px) {
            .process-steps { gap: 24px; }
            .process-step { flex: 1 1 140px; max-width: 160px; }
            .process-step::after { display: none; }
        }

        /* ===== CMS Posts / 最新资讯 ===== */
        .posts-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 28px;
        }
        .post-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            border: 1px solid var(--border);
            display: flex;
            flex-direction: column;
        }
        .post-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
        .post-card .thumb {
            width: 100%;
            height: 200px;
            object-fit: cover;
            background: var(--border);
        }
        .post-card .body { padding: 24px; flex: 1; display: flex; flex-direction: column; }
        .post-card .cat {
            display: inline-block;
            background: rgba(26, 58, 92, 0.08);
            color: var(--primary-light);
            padding: 2px 12px;
            border-radius: 40px;
            font-size: 12px;
            font-weight: 600;
            margin-bottom: 10px;
            align-self: flex-start;
        }
        .post-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; line-height: 1.4; }
        .post-card h3 a { color: var(--primary); }
        .post-card h3 a:hover { color: var(--accent); }
        .post-card .excerpt { font-size: 14px; color: var(--text-light); line-height: 1.7; flex: 1; margin-bottom: 14px; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
        .post-card .meta { font-size: 13px; color: var(--text-lighter); display: flex; align-items: center; gap: 12px; border-top: 1px solid var(--border); padding-top: 14px; }

        .empty-posts {
            text-align: center;
            padding: 48px 24px;
            color: var(--text-lighter);
            font-size: 16px;
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px dashed var(--border);
        }

        /* ===== FAQ ===== */
        .faq-list { max-width: 780px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--primary-lighter); }
        .faq-question {
            padding: 18px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--primary);
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            background: none;
            width: 100%;
            text-align: left;
        }
        .faq-question i { transition: var(--transition); color: var(--text-lighter); font-size: 14px; }
        .faq-item.open .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-light);
            font-size: 15px;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-box {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            border-radius: var(--radius-lg);
            padding: 64px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
            isolation: isolate;
        }
        .cta-box::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            opacity: 0.1;
            z-index: 0;
        }
        .cta-box > * { position: relative; z-index: 1; }
        .cta-box h2 { font-size: clamp(26px, 3.2vw, 36px); font-weight: 700; color: #fff; margin-bottom: 16px; }
        .cta-box p { font-size: 17px; color: rgba(255,255,255,0.8); max-width: 560px; margin: 0 auto 28px; }
        .cta-box .btn { background: #fff; color: var(--primary); box-shadow: 0 4px 20px rgba(0,0,0,0.15); }
        .cta-box .btn:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(0,0,0,0.2); color: var(--primary); }

        /* ===== 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: 32px;
        }
        .footer-brand .site-logo { font-size: 22px; margin-bottom: 12px; display: inline-block; }
        .footer-brand p { font-size: 14px; line-height: 1.8; max-width: 360px; }
        .footer-col h4 { font-size: 15px; font-weight: 600; color: #fff; margin-bottom: 16px; }
        .footer-col a { display: block; font-size: 14px; color: rgba(255,255,255,0.6); padding: 4px 0; }
        .footer-col a:hover { color: var(--accent-light); }

        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: 24px;
            text-align: center;
            font-size: 13px;
            color: rgba(255,255,255,0.4);
        }

        @media (max-width: 768px) {
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-brand p { max-width: 100%; }
            .section { padding: 56px 0; }
            .posts-grid { grid-template-columns: 1fr; }
            .cta-box { padding: 40px 24px; }
            .features-grid { grid-template-columns: 1fr; }
        }

        /* ===== Utility ===== */
        .text-center { text-align: center; }
        .mt-16 { margin-top: 16px; }
        .mb-16 { margin-bottom: 16px; }
        .gap-8 { gap: 8px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }

        /* Scrollbar */
        ::-webkit-scrollbar { width: 6px; }
        ::-webkit-scrollbar-track { background: var(--bg); }
        ::-webkit-scrollbar-thumb { background: var(--text-lighter); border-radius: 10px; }
        ::-webkit-scrollbar-thumb:hover { background: var(--text-light); }

        /* Focus visible */
        *:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; border-radius: 4px; }

        /* ===== Back to top ===== */
        .back-top {
            position: fixed;
            bottom: 28px;
            right: 28px;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 16px rgba(26,58,92,0.2);
            transition: var(--transition);
            opacity: 0;
            visibility: hidden;
            z-index: 999;
        }
        .back-top.visible { opacity: 1; visibility: visible; }
        .back-top:hover { background: var(--primary-light); transform: translateY(-2px); }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #3b82f6;
            --primary-gradient: linear-gradient(135deg, #2563eb 0%, #1e40af 100%);
            --secondary: #f59e0b;
            --secondary-light: #fbbf24;
            --accent: #06b6d4;
            --bg-body: #f8fafc;
            --bg-section: #ffffff;
            --bg-alt: #f1f5f9;
            --bg-dark: #0f172a;
            --text-primary: #1e293b;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
            --text-light: #ffffff;
            --border-color: #e2e8f0;
            --border-radius-sm: 8px;
            --border-radius-md: 12px;
            --border-radius-lg: 20px;
            --border-radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
            --shadow-xl: 0 20px 60px rgba(0,0,0,0.15);
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --spacing-xs: 4px;
            --spacing-sm: 8px;
            --spacing-md: 16px;
            --spacing-lg: 24px;
            --spacing-xl: 32px;
            --spacing-2xl: 48px;
            --spacing-3xl: 64px;
            --spacing-4xl: 80px;
            --container-max: 1200px;
            --header-height: 76px;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* ===== 基础 Reset ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { text-decoration: none; color: inherit; transition: color var(--transition); }
        button { font-family: inherit; cursor: pointer; border: none; background: none; }
        input, textarea { font-family: inherit; font-size: inherit; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text-primary); }
        h1 { font-size: clamp(2rem, 5vw, 3.2rem); }
        h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); }
        h3 { font-size: clamp(1.2rem, 2.5vw, 1.6rem); }
        p { margin-bottom: 1em; }
        .container {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 浮动 Dock 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            padding: 12px 20px;
            background: transparent;
            pointer-events: none;
            transition: background var(--transition);
        }
        .site-header.scrolled {
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(18px) saturate(1.8);
            -webkit-backdrop-filter: blur(18px) saturate(1.8);
            box-shadow: 0 1px 12px rgba(0,0,0,0.06);
        }
        .nav-dock {
            max-width: 960px;
            margin: 0 auto;
            background: rgba(255,255,255,0.85);
            backdrop-filter: blur(20px) saturate(2);
            -webkit-backdrop-filter: blur(20px) saturate(2);
            border-radius: 60px;
            padding: 8px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            box-shadow: 0 4px 24px rgba(0,0,0,0.06), 0 1px 4px rgba(0,0,0,0.04);
            border: 1px solid rgba(255,255,255,0.5);
            pointer-events: auto;
            transition: all var(--transition);
        }
        .nav-dock:hover {
            box-shadow: 0 8px 32px rgba(37,99,235,0.10);
        }
        .site-logo {
            font-size: 1.2rem;
            font-weight: 800;
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.3px;
            white-space: nowrap;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .nav-links a {
            padding: 6px 16px;
            border-radius: 40px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition);
            position: relative;
            line-height: 1.4;
        }
        .nav-links a:hover {
            color: var(--primary);
            background: rgba(37,99,235,0.06);
        }
        .nav-links a.active {
            color: var(--text-light);
            background: var(--primary-gradient);
            box-shadow: 0 2px 8px rgba(37,99,235,0.25);
        }
        .nav-links a.nav-cta {
            background: var(--primary-gradient);
            color: #fff;
            padding: 6px 20px;
            box-shadow: 0 2px 8px rgba(37,99,235,0.20);
        }
        .nav-links a.nav-cta:hover {
            transform: translateY(-1px);
            box-shadow: 0 4px 16px rgba(37,99,235,0.30);
        }
        .nav-toggle {
            display: none;
            width: 38px;
            height: 38px;
            align-items: center;
            justify-content: center;
            border-radius: 40px;
            background: rgba(37,99,235,0.08);
            color: var(--primary);
            font-size: 1.2rem;
            transition: background var(--transition);
            cursor: pointer;
        }
        .nav-toggle:hover { background: rgba(37,99,235,0.15); }

        /* ===== Hero 横幅 ===== */
        .article-hero {
            position: relative;
            padding: 140px 0 60px;
            margin-top: 0;
            background: var(--bg-dark);
            overflow: hidden;
            min-height: 300px;
            display: flex;
            align-items: center;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            opacity: 0.25;
            transform: scale(1.05);
            filter: saturate(0.6);
        }
        .article-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,23,42,0.88) 0%, rgba(30,64,175,0.70) 100%);
        }
        .article-hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .article-hero h1 {
            color: var(--text-light);
            font-size: clamp(1.6rem, 4vw, 2.8rem);
            font-weight: 800;
            max-width: 900px;
            margin: 0 auto 12px;
            line-height: 1.3;
            text-shadow: 0 2px 20px rgba(0,0,0,0.2);
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px 24px;
            color: rgba(255,255,255,0.7);
            font-size: 0.9rem;
            margin-top: 8px;
        }
        .article-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .article-meta i { font-size: 0.85rem; }
        .article-meta .category-badge {
            background: rgba(255,255,255,0.15);
            padding: 2px 14px;
            border-radius: 40px;
            font-size: 0.8rem;
            color: var(--secondary-light);
            font-weight: 500;
        }

        /* ===== 文章正文 ===== */
        .article-main {
            padding: 48px 0 64px;
            background: var(--bg-body);
        }
        .article-content-wrap {
            max-width: 820px;
            margin: 0 auto;
            background: var(--bg-section);
            border-radius: var(--border-radius-lg);
            padding: 40px 48px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
        }
        .article-body {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--text-primary);
        }
        .article-body p {
            margin-bottom: 1.2em;
        }
        .article-body h2, .article-body h3 {
            margin-top: 1.8em;
            margin-bottom: 0.6em;
        }
        .article-body h2 { font-size: 1.5rem; }
        .article-body h3 { font-size: 1.2rem; }
        .article-body img {
            border-radius: var(--border-radius-md);
            margin: 1.5em auto;
            box-shadow: var(--shadow-sm);
        }
        .article-body ul, .article-body ol {
            margin: 1em 0;
            padding-left: 1.5em;
        }
        .article-body li {
            margin-bottom: 0.5em;
            list-style: disc;
        }
        .article-body a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .article-body a:hover {
            color: var(--primary-dark);
        }
        .article-body blockquote {
            border-left: 4px solid var(--primary);
            padding: 12px 20px;
            margin: 1.5em 0;
            background: var(--bg-alt);
            border-radius: 0 var(--border-radius-sm) var(--border-radius-sm) 0;
            color: var(--text-secondary);
        }
        .article-not-found {
            text-align: center;
            padding: 60px 20px;
        }
        .article-not-found h2 {
            font-size: 1.8rem;
            color: var(--text-muted);
            margin-bottom: 16px;
        }
        .article-not-found p {
            color: var(--text-secondary);
            margin-bottom: 24px;
        }
        .btn-back-home {
            display: inline-block;
            padding: 12px 32px;
            background: var(--primary-gradient);
            color: #fff;
            border-radius: 60px;
            font-weight: 600;
            box-shadow: 0 4px 12px rgba(37,99,235,0.20);
            transition: all var(--transition);
        }
        .btn-back-home:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(37,99,235,0.30);
        }

        /* ===== 相关文章 ===== */
        .related-section {
            padding: 48px 0 64px;
            background: var(--bg-alt);
        }
        .related-section h2 {
            text-align: center;
            margin-bottom: 32px;
            font-size: 1.6rem;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: 24px;
        }
        .related-card {
            background: var(--bg-section);
            border-radius: var(--border-radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: all var(--transition);
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .related-card img {
            width: 100%;
            height: 160px;
            object-fit: cover;
        }
        .related-card-body {
            padding: 16px 20px 20px;
        }
        .related-card-body h3 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 6px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card-body p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 0;
        }
        .related-card-body .meta {
            font-size: 0.78rem;
            color: var(--text-muted);
            margin-top: 8px;
        }

        /* ===== CTA 区块 ===== */
        .article-cta {
            padding: 48px 0;
            background: var(--bg-dark);
            position: relative;
            overflow: hidden;
        }
        .article-cta::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.webp') center center / cover no-repeat;
            opacity: 0.12;
            filter: saturate(0.5);
        }
        .article-cta .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .article-cta h2 {
            color: var(--text-light);
            font-size: 1.8rem;
            margin-bottom: 8px;
        }
        .article-cta p {
            color: rgba(255,255,255,0.7);
            max-width: 600px;
            margin: 0 auto 20px;
            font-size: 1rem;
        }
        .btn-cta-primary {
            display: inline-block;
            padding: 14px 40px;
            background: var(--secondary);
            color: #1e293b;
            border-radius: 60px;
            font-weight: 700;
            font-size: 1.05rem;
            box-shadow: 0 4px 16px rgba(245,158,11,0.30);
            transition: all var(--transition);
        }
        .btn-cta-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(245,158,11,0.40);
            background: var(--secondary-light);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.7);
            padding: 48px 0 24px;
            border-top: 1px solid rgba(255,255,255,0.06);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }
        .footer-brand .site-logo {
            font-size: 1.3rem;
            display: inline-block;
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: rgba(255,255,255,0.5);
            max-width: 400px;
        }
        .footer-col h4 {
            color: var(--text-light);
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 12px;
        }
        .footer-col a {
            display: block;
            color: rgba(255,255,255,0.5);
            font-size: 0.88rem;
            padding: 4px 0;
            transition: color var(--transition);
        }
        .footer-col a:hover {
            color: var(--secondary-light);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.06);
            padding-top: 20px;
            text-align: center;
            font-size: 0.82rem;
            color: rgba(255,255,255,0.35);
        }
        .footer-bottom a {
            color: rgba(255,255,255,0.4);
        }
        .footer-bottom a:hover {
            color: var(--secondary-light);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 820px) {
            .article-content-wrap {
                padding: 28px 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .footer-brand { grid-column: 1 / -1; }
        }

        @media (max-width: 768px) {
            .nav-dock {
                padding: 6px 16px;
                border-radius: 40px;
            }
            .nav-links {
                display: none;
                position: absolute;
                top: calc(100% + 10px);
                left: 0;
                right: 0;
                background: rgba(255,255,255,0.96);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                border-radius: 20px;
                padding: 12px 8px;
                flex-direction: column;
                gap: 4px;
                box-shadow: 0 12px 40px rgba(0,0,0,0.12);
                border: 1px solid rgba(255,255,255,0.3);
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links a {
                padding: 10px 20px;
                width: 100%;
                text-align: center;
            }
            .nav-toggle {
                display: flex;
            }
            .article-hero {
                padding: 120px 0 40px;
                min-height: 220px;
            }
            .article-content-wrap {
                padding: 20px 18px;
                border-radius: var(--border-radius-md);
            }
            .article-body {
                font-size: 0.98rem;
            }
            .related-grid {
                grid-template-columns: 1fr 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }

        @media (max-width: 520px) {
            .site-header { padding: 8px 12px; }
            .nav-dock { padding: 6px 12px; }
            .site-logo { font-size: 1rem; }
            .article-hero h1 { font-size: 1.3rem; }
            .article-meta { font-size: 0.8rem; gap: 8px 12px; }
            .article-content-wrap { padding: 16px 14px; }
            .related-grid { grid-template-columns: 1fr; }
            .article-cta h2 { font-size: 1.3rem; }
            .btn-cta-primary { padding: 12px 28px; font-size: 0.95rem; }
        }

        /* ===== 工具类 ===== */
        .text-center { text-align: center; }
        .mt-2 { margin-top: 16px; }
        .mb-2 { margin-bottom: 16px; }
        .tag {
            display: inline-block;
            padding: 2px 12px;
            border-radius: 40px;
            font-size: 0.78rem;
            font-weight: 500;
            background: rgba(37,99,235,0.08);
            color: var(--primary);
        }
        .tag-secondary {
            background: rgba(245,158,11,0.12);
            color: #b45309;
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #1e40af;
            --primary-light: #2563eb;
            --primary-dark: #1e3a8a;
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --accent-dark: #d97706;
            --bg-white: #ffffff;
            --bg-light: #f1f5f9;
            --bg-dark: #0f172a;
            --bg-card: #ffffff;
            --text-dark: #0f172a;
            --text-body: #334155;
            --text-light: #64748b;
            --text-white: #ffffff;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --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, 0.08), 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, 0.04);
            --shadow-xl: 0 20px 48px rgba(0, 0, 0, 0.12);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --container-max: 1200px;
            --nav-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

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

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-body);
            background: var(--bg-light);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        a:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
            border-radius: 4px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: 1rem;
            border: none;
            outline: none;
        }

        button {
            cursor: pointer;
            background: none;
        }

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

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            color: var(--text-dark);
            line-height: 1.3;
            font-weight: 700;
            letter-spacing: -0.02em;
        }

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

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Dock Navigation ===== */
        .site-header {
            position: fixed;
            top: 16px;
            left: 0;
            right: 0;
            z-index: 1000;
            display: flex;
            justify-content: center;
            pointer-events: none;
            padding: 0 16px;
        }

        .nav-dock {
            pointer-events: auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            background: rgba(255, 255, 255, 0.88);
            backdrop-filter: blur(16px) saturate(180%);
            -webkit-backdrop-filter: blur(16px) saturate(180%);
            border: 1px solid rgba(255, 255, 255, 0.3);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08), 0 0 0 1px rgba(0, 0, 0, 0.02);
            border-radius: var(--radius-xl);
            padding: 8px 24px;
            max-width: 820px;
            width: 100%;
            height: 60px;
            transition: box-shadow var(--transition), background var(--transition);
        }

        .nav-dock:hover {
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.12), 0 0 0 1px rgba(0, 0, 0, 0.03);
        }

        .site-logo {
            font-size: 1.2rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.03em;
            white-space: nowrap;
            transition: opacity var(--transition);
        }
        .site-logo:hover {
            opacity: 0.8;
            color: var(--primary);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: nowrap;
        }

        .nav-links a {
            padding: 6px 14px;
            border-radius: var(--radius-lg);
            font-size: 0.875rem;
            font-weight: 500;
            color: var(--text-body);
            transition: background var(--transition), color var(--transition), transform var(--transition);
            white-space: nowrap;
            position: relative;
        }

        .nav-links a:hover {
            background: rgba(30, 64, 175, 0.08);
            color: var(--primary);
            transform: translateY(-1px);
        }

        .nav-links a.active {
            background: var(--primary);
            color: var(--text-white);
            box-shadow: 0 2px 8px rgba(30, 64, 175, 0.25);
        }

        .nav-links a.active:hover {
            background: var(--primary-dark);
            transform: none;
        }

        .nav-links a.nav-cta {
            background: var(--accent);
            color: var(--text-dark);
            font-weight: 600;
            padding: 6px 18px;
            box-shadow: 0 2px 8px rgba(245, 158, 11, 0.3);
        }

        .nav-links a.nav-cta:hover {
            background: var(--accent-dark);
            color: var(--text-white);
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(245, 158, 11, 0.4);
        }

        .nav-toggle {
            display: none;
            font-size: 1.4rem;
            color: var(--text-dark);
            background: none;
            border: none;
            padding: 4px 8px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }
        .nav-toggle:hover {
            background: rgba(0, 0, 0, 0.05);
        }

        /* Mobile nav overlay */
        .nav-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.3);
            z-index: 998;
            backdrop-filter: blur(4px);
        }
        .nav-overlay.open {
            display: block;
        }

        @media (max-width: 820px) {
            .site-header {
                top: 12px;
                padding: 0 12px;
            }
            .nav-dock {
                padding: 6px 16px;
                height: 56px;
                border-radius: var(--radius-lg);
            }
            .site-logo {
                font-size: 1rem;
            }
            .nav-links {
                display: none;
                position: fixed;
                top: 80px;
                left: 12px;
                right: 12px;
                background: rgba(255, 255, 255, 0.96);
                backdrop-filter: blur(16px);
                border-radius: var(--radius-lg);
                padding: 12px 8px;
                flex-direction: column;
                gap: 4px;
                box-shadow: 0 16px 48px rgba(0, 0, 0, 0.16);
                border: 1px solid var(--border);
                z-index: 999;
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links a {
                width: 100%;
                text-align: center;
                padding: 10px 16px;
                font-size: 0.95rem;
            }
            .nav-links a.nav-cta {
                margin-top: 4px;
            }
            .nav-toggle {
                display: flex;
                align-items: center;
                justify-content: center;
            }
        }

        @media (max-width: 480px) {
            .site-logo {
                font-size: 0.9rem;
                max-width: 140px;
                overflow: hidden;
                text-overflow: ellipsis;
            }
            .nav-dock {
                padding: 4px 12px;
                height: 50px;
                border-radius: var(--radius-md);
            }
        }

        /* ===== Hero Section ===== */
        .hero-section {
            position: relative;
            min-height: 600px;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 140px 24px 80px;
            background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 60%, #1e40af 100%);
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.18;
            mix-blend-mode: overlay;
        }

        .hero-section::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(245, 158, 11, 0.12) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 30%, rgba(37, 99, 235, 0.10) 0%, transparent 50%);
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 800px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.15);
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 500;
            color: var(--accent-light);
            margin-bottom: 24px;
            letter-spacing: 0.3px;
        }

        .hero-badge i {
            font-size: 0.7rem;
        }

        .hero-title {
            font-size: 3.2rem;
            font-weight: 800;
            color: var(--text-white);
            line-height: 1.2;
            margin-bottom: 20px;
            letter-spacing: -0.03em;
        }

        .hero-title .highlight {
            background: linear-gradient(135deg, var(--accent-light), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-sub {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.75);
            max-width: 600px;
            margin: 0 auto 32px;
            line-height: 1.8;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            justify-content: center;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: var(--radius-lg);
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition);
            border: none;
            cursor: pointer;
            text-decoration: none;
        }

        .btn-primary {
            background: var(--accent);
            color: var(--text-dark);
            box-shadow: 0 4px 16px rgba(245, 158, 11, 0.35);
        }
        .btn-primary:hover {
            background: var(--accent-dark);
            color: var(--text-white);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(245, 158, 11, 0.45);
        }

        .btn-outline-light {
            background: transparent;
            color: var(--text-white);
            border: 2px solid rgba(255, 255, 255, 0.25);
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.10);
            border-color: rgba(255, 255, 255, 0.5);
            transform: translateY(-2px);
        }

        .hero-stats {
            display: flex;
            justify-content: center;
            gap: 40px;
            margin-top: 48px;
            flex-wrap: wrap;
        }

        .hero-stat {
            text-align: center;
            color: rgba(255, 255, 255, 0.8);
        }

        .hero-stat .num {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--text-white);
            display: block;
            line-height: 1.2;
        }

        .hero-stat .label {
            font-size: 0.8rem;
            opacity: 0.7;
            margin-top: 2px;
        }

        @media (max-width: 768px) {
            .hero-section {
                min-height: 480px;
                padding: 120px 16px 60px;
            }
            .hero-title {
                font-size: 2rem;
            }
            .hero-sub {
                font-size: 1rem;
            }
            .hero-stats {
                gap: 24px;
            }
            .hero-stat .num {
                font-size: 1.4rem;
            }
        }

        @media (max-width: 480px) {
            .hero-title {
                font-size: 1.6rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .btn {
                width: 100%;
                max-width: 280px;
                justify-content: center;
            }
            .hero-stats {
                gap: 16px;
            }
            .hero-stat {
                flex: 1 1 80px;
            }
        }

        /* ===== Section Shared ===== */
        .section {
            padding: 80px 0;
        }

        .section-header {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 56px;
        }

        .section-header h2 {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 16px;
            color: var(--text-dark);
        }

        .section-header p {
            font-size: 1.05rem;
            color: var(--text-light);
            line-height: 1.8;
        }

        .section-header .tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 2px;
            color: var(--primary-light);
            background: rgba(37, 99, 235, 0.08);
            padding: 4px 14px;
            border-radius: 50px;
            margin-bottom: 12px;
        }

        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }
            .section-header {
                margin-bottom: 40px;
            }
            .section-header h2 {
                font-size: 1.6rem;
            }
        }

        /* ===== Advantages Section ===== */
        .advantages-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .advantage-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: all var(--transition);
        }

        .advantage-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(30, 64, 175, 0.15);
        }

        .advantage-card .icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-md);
            background: linear-gradient(135deg, rgba(30, 64, 175, 0.08), rgba(37, 99, 235, 0.12));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            margin: 0 auto 16px;
            color: var(--primary-light);
            transition: background var(--transition);
        }

        .advantage-card:hover .icon {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: var(--text-white);
        }

        .advantage-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .advantage-card p {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.7;
        }

        @media (max-width: 992px) {
            .advantages-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 520px) {
            .advantages-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .advantage-card {
                padding: 24px 16px;
            }
        }

        /* ===== Scenarios Section ===== */
        .bg-light-section {
            background: var(--bg-white);
        }

        .scenarios-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .scenario-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: all var(--transition);
        }

        .scenario-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }

        .scenario-card .img-wrap {
            height: 200px;
            overflow: hidden;
            position: relative;
        }

        .scenario-card .img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
            border-radius: 0;
        }

        .scenario-card:hover .img-wrap img {
            transform: scale(1.05);
        }

        .scenario-card .img-wrap .overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 50%, rgba(0, 0, 0, 0.3));
            pointer-events: none;
        }

        .scenario-card .body {
            padding: 24px 20px 28px;
        }

        .scenario-card .body h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .scenario-card .body p {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.7;
        }

        .scenario-card .badge {
            display: inline-block;
            font-size: 0.7rem;
            font-weight: 600;
            padding: 2px 10px;
            border-radius: 50px;
            background: rgba(37, 99, 235, 0.08);
            color: var(--primary-light);
            margin-bottom: 10px;
            letter-spacing: 0.3px;
        }

        @media (max-width: 992px) {
            .scenarios-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 620px) {
            .scenarios-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .scenario-card .img-wrap {
                height: 170px;
            }
        }

        /* ===== Steps Section ===== */
        .steps-section {
            background: var(--bg-dark);
            color: var(--text-white);
        }

        .steps-section .section-header h2 {
            color: var(--text-white);
        }
        .steps-section .section-header p {
            color: rgba(255, 255, 255, 0.6);
        }
        .steps-section .section-header .tag {
            background: rgba(255, 255, 255, 0.08);
            color: var(--accent-light);
        }

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

        .steps-grid::before {
            content: '';
            position: absolute;
            top: 44px;
            left: 50px;
            right: 50px;
            height: 2px;
            background: linear-gradient(90deg, var(--accent), var(--primary-light), var(--accent));
            opacity: 0.3;
        }

        .step-card {
            text-align: center;
            position: relative;
            z-index: 2;
            counter-increment: step-counter;
        }

        .step-card .step-num {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--accent);
            color: var(--text-dark);
            font-weight: 800;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            box-shadow: 0 0 0 4px rgba(245, 158, 11, 0.2);
        }

        .step-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 8px;
        }

        .step-card p {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.7;
        }

        @media (max-width: 992px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 32px;
            }
            .steps-grid::before {
                display: none;
            }
        }

        @media (max-width: 520px) {
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .step-card .step-num {
                width: 40px;
                height: 40px;
                font-size: 1rem;
            }
        }

        /* ===== Trust / Safety Section ===== */
        .trust-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .trust-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            text-align: center;
        }

        .trust-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }

        .trust-item .icon {
            font-size: 2.2rem;
            color: var(--primary-light);
            margin-bottom: 12px;
        }

        .trust-item h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .trust-item p {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.7;
        }

        .trust-item .stat-highlight {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary);
            display: block;
            margin-bottom: 4px;
        }

        @media (max-width: 992px) {
            .trust-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 620px) {
            .trust-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .trust-item {
                padding: 24px 16px;
            }
        }

        /* ===== FAQ Section ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            margin-bottom: 12px;
            overflow: hidden;
            transition: box-shadow var(--transition);
        }

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

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-dark);
            background: transparent;
            text-align: left;
            transition: background var(--transition);
            gap: 16px;
        }

        .faq-question:hover {
            background: rgba(0, 0, 0, 0.02);
        }

        .faq-question .icon {
            font-size: 1.2rem;
            color: var(--primary-light);
            transition: transform var(--transition);
            flex-shrink: 0;
        }

        .faq-item.open .faq-question .icon {
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        .faq-answer p {
            font-size: 0.92rem;
            color: var(--text-light);
            line-height: 1.8;
        }

        @media (max-width: 768px) {
            .faq-question {
                padding: 14px 16px;
                font-size: 0.95rem;
            }
            .faq-answer {
                padding: 0 16px;
            }
            .faq-item.open .faq-answer {
                padding: 0 16px 16px;
            }
        }

        /* ===== CTA Section ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, #1e40af 100%);
            padding: 80px 24px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }

        .cta-content {
            position: relative;
            z-index: 2;
            max-width: 640px;
            margin: 0 auto;
        }

        .cta-content h2 {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 16px;
        }

        .cta-content p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 32px;
            line-height: 1.8;
        }

        .cta-content .btn {
            font-size: 1.05rem;
            padding: 16px 40px;
        }

        @media (max-width: 768px) {
            .cta-section {
                padding: 56px 16px;
            }
            .cta-content h2 {
                font-size: 1.7rem;
            }
            .cta-content p {
                font-size: 0.95rem;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 56px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .footer-brand .site-logo {
            color: var(--text-white);
            font-size: 1.2rem;
            display: inline-block;
            margin-bottom: 12px;
        }

        .footer-brand p {
            font-size: 0.88rem;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.5);
            max-width: 360px;
        }

        .footer-col h4 {
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }

        .footer-col a {
            display: block;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
            padding: 4px 0;
            transition: color var(--transition), padding-left var(--transition);
        }

        .footer-col a:hover {
            color: var(--accent-light);
            padding-left: 4px;
        }

        .footer-bottom {
            padding: 24px 0;
            text-align: center;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.3);
            line-height: 1.7;
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.35);
        }
        .footer-bottom a:hover {
            color: var(--accent-light);
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .footer-brand p {
                max-width: 100%;
            }
        }

        @media (max-width: 480px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .site-footer {
                padding: 40px 0 0;
            }
        }

        /* ===== Scrollbar ===== */
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-light);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--border);
            border-radius: 10px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--text-light);
        }

        /* ===== Back to Top ===== */
        .back-top {
            position: fixed;
            bottom: 32px;
            right: 32px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: var(--text-white);
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: var(--shadow-lg);
            z-index: 999;
            opacity: 0;
            visibility: hidden;
            transform: translateY(16px);
            transition: all var(--transition);
            border: none;
        }

        .back-top.visible {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .back-top:hover {
            background: var(--primary-dark);
            transform: translateY(-4px);
            box-shadow: var(--shadow-xl);
        }

        @media (max-width: 480px) {
            .back-top {
                bottom: 20px;
                right: 20px;
                width: 42px;
                height: 42px;
                font-size: 1rem;
            }
        }

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

        .section-divider {
            width: 60px;
            height: 3px;
            background: linear-gradient(90deg, var(--primary-light), var(--accent));
            border-radius: 4px;
            margin: 0 auto 16px;
        }

        .text-center {
            text-align: center;
        }