/* roulang page: index */
:root {
            --primary: #2B6CD4;
            --primary-dark: #2458B0;
            --primary-light: rgba(43, 108, 212, 0.08);
            --primary-mid: rgba(43, 108, 212, 0.15);
            --accent: #E8A33D;
            --accent-dark: #D18A2C;
            --bg: #F5F7FA;
            --card-bg: #FFFFFF;
            --text: #1E2A3A;
            --text-body: #4A5568;
            --text-muted: #8A94A6;
            --border: #E3E8EF;
            --radius: 12px;
            --radius-sm: 8px;
            --shadow: 0 1px 3px rgba(15, 23, 42, 0.06);
            --shadow-hover: 0 12px 32px rgba(15, 23, 42, 0.10);
            --footer-bg: #14213D;
            --sidebar-width: 88px;
            --transition: all 0.3s ease;
        }

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

        html { scroll-behavior: smooth; }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            background: var(--bg);
            color: var(--text-body);
            line-height: 1.8;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

        img { max-width: 100%; display: block; }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-dark); }
        ul { list-style: none; }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .grid-margin-x { margin-left: -12px; margin-right: -12px; }
        .grid-margin-x > .cell { padding-left: 12px; padding-right: 12px; }

        /* ========== 按钮 ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 44px;
            padding: 0 24px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            line-height: 1;
            white-space: nowrap;
        }
        .btn:focus-visible { outline: 3px solid var(--primary-mid); outline-offset: 2px; }

        .btn-primary { background: var(--primary); color: #fff; }
        .btn-primary:hover { background: var(--primary-dark); color: #fff; transform: translateY(-1px); box-shadow: 0 4px 14px rgba(43, 108, 212, 0.30); }

        .btn-outline { background: transparent; color: #fff; border: 1.5px solid rgba(255,255,255,0.75); }
        .btn-outline:hover { background: rgba(255,255,255,0.12); color: #fff; border-color: #fff; }

        .btn-accent { background: var(--accent); color: #fff; }
        .btn-accent:hover { background: var(--accent-dark); color: #fff; transform: translateY(-1px); box-shadow: 0 4px 16px rgba(232, 163, 61, 0.35); }

        .btn-outline-light { background: transparent; color: #fff; border: 1.5px solid rgba(255,255,255,0.7); }
        .btn-outline-light:hover { background: rgba(255,255,255,0.1); color: #fff; }

        .btn-sm { height: 38px; padding: 0 18px; font-size: 14px; }

        /* ========== 左侧导航 ========== */
        .side-nav {
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            width: var(--sidebar-width);
            background: #FAFBFC;
            border-right: 1px solid var(--border);
            z-index: 1000;
            display: flex;
            flex-direction: column;
            align-items: center;
            padding: 0 8px;
        }

        .side-logo {
            display: flex;
            flex-direction: column;
            align-items: center;
            padding: 18px 0 14px;
            text-decoration: none;
            border-bottom: 1px solid var(--border);
            width: 100%;
            margin-bottom: 14px;
        }
        .logo-badge {
            width: 42px;
            height: 42px;
            background: var(--primary);
            color: #fff;
            border-radius: 11px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 700;
            box-shadow: 0 4px 12px rgba(43, 108, 212, 0.28);
        }
        .logo-text {
            font-size: 12px;
            font-weight: 600;
            color: var(--text);
            margin-top: 7px;
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

        .side-nav-items {
            display: flex;
            flex-direction: column;
            gap: 4px;
            width: 100%;
            flex: 1;
        }

        .nav-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            padding: 10px 0 8px;
            color: var(--text-muted);
            text-decoration: none;
            border-radius: 10px;
            border-left: 3px solid transparent;
            font-size: 11px;
            font-weight: 500;
            transition: var(--transition);
            text-align: center;
        }
        .nav-item i { font-size: 18px; margin-bottom: 4px; }
        .nav-item span { line-height: 1.2; }
        .nav-item:hover { background: var(--primary-light); color: var(--primary); text-decoration: none; }
        .nav-item.active {
            background: var(--primary-light);
            color: var(--primary);
            border-left-color: var(--primary);
            font-weight: 600;
        }

        .side-nav-foot {
            padding: 14px 0;
            font-size: 10px;
            color: #B0BAC9;
            text-align: center;
            line-height: 1.5;
            border-top: 1px solid var(--border);
            width: 100%;
        }

        /* ========== 移动端顶部栏 ========== */
        .mobile-header {
            position: sticky;
            top: 0;
            z-index: 900;
            display: none;
            justify-content: space-between;
            align-items: center;
            padding: 0 20px;
            height: 56px;
            background: #fff;
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow);
        }
        .mobile-logo {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .mobile-logo .logo-badge { width: 30px; height: 30px; font-size: 14px; border-radius: 8px; box-shadow: none; }
        .hamburger {
            background: none;
            border: none;
            font-size: 22px;
            color: var(--text);
            cursor: pointer;
            padding: 8px;
            border-radius: 8px;
            transition: var(--transition);
        }
        .hamburger:hover { background: var(--primary-light); color: var(--primary); }

        /* ========== 抽屉 ========== */
        .drawer-overlay {
            position: fixed;
            inset: 0;
            background: rgba(15, 23, 42, 0.55);
            z-index: 1100;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
        }
        .drawer-overlay.show { opacity: 1; visibility: visible; }

        .drawer {
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            width: 280px;
            background: #fff;
            z-index: 1200;
            transform: translateX(-100%);
            transition: transform 0.35s ease;
            display: flex;
            flex-direction: column;
            padding: 0;
            box-shadow: 4px 0 24px rgba(15, 23, 42, 0.12);
        }
        .drawer.open { transform: translateX(0); }

        .drawer-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 24px;
            border-bottom: 1px solid var(--border);
        }
        .drawer-logo { font-size: 18px; font-weight: 700; color: var(--text); }
        .drawer-close {
            background: none;
            border: none;
            font-size: 20px;
            color: var(--text-muted);
            cursor: pointer;
            padding: 6px;
            border-radius: 8px;
            transition: var(--transition);
        }
        .drawer-close:hover { background: var(--primary-light); color: var(--primary); }

        .drawer-nav { flex: 1; padding: 20px 16px; display: flex; flex-direction: column; gap: 6px; }
        .drawer-nav a {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 14px 18px;
            border-radius: 10px;
            color: var(--text);
            font-size: 15px;
            font-weight: 500;
            text-decoration: none;
            transition: var(--transition);
        }
        .drawer-nav a i { width: 20px; text-align: center; color: var(--text-muted); }
        .drawer-nav a:hover { background: var(--primary-light); color: var(--primary); }
        .drawer-nav a.active { background: var(--primary-light); color: var(--primary); font-weight: 600; }

        .drawer-copy {
            padding: 16px 24px;
            border-top: 1px solid var(--border);
            font-size: 12px;
            color: var(--text-muted);
            text-align: center;
        }

        /* ========== 主内容区 ========== */
        .main-area {
            margin-left: var(--sidebar-width);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        main { flex: 1; padding-bottom: 80px; }

        /* ========== Hero ========== */
        .hero {
            position: relative;
            min-height: 520px;
            display: flex;
            align-items: center;
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(75deg, rgba(20, 33, 61, 0.80) 0%, rgba(43, 108, 212, 0.55) 60%, rgba(20, 33, 61, 0.35) 100%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            padding: 80px 0 60px;
            max-width: 760px;
        }
        .hero h1 {
            color: #fff;
            font-size: clamp(30px, 4.5vw, 46px);
            font-weight: 700;
            line-height: 1.25;
            margin-bottom: 20px;
            text-shadow: 0 2px 20px rgba(0,0,0,0.25);
        }
        .hero-sub {
            color: rgba(255, 255, 255, 0.92);
            font-size: 17px;
            line-height: 1.8;
            margin-bottom: 34px;
            max-width: 560px;
        }
        .hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

        .scroll-indicator {
            position: absolute;
            bottom: 26px;
            left: 50%;
            transform: translateX(-50%);
            color: rgba(255,255,255,0.75);
            font-size: 20px;
            z-index: 3;
            animation: scroll-bounce 2.2s infinite;
            transition: var(--transition);
        }
        .scroll-indicator:hover { color: #fff; }
        @keyframes scroll-bounce {
            0%, 100% { transform: translateX(-50%) translateY(0); }
            50% { transform: translateX(-50%) translateY(8px); }
        }

        /* ========== 通用板块 ========== */
        .section { padding: 96px 0; }
        .alt-bg { background: #fff; }

        .section-head {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 56px;
        }
        .section-head h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text);
            line-height: 1.3;
            margin-bottom: 14px;
        }
        .section-head p { font-size: 16px; color: var(--text-muted); }

        /* ========== 卖点三连 ========== */
        .features-grid { align-items: stretch; }

        .feature-card {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 32px 28px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            height: 100%;
            transition: var(--transition);
            max-width: 380px;
            margin: 0 auto;
        }
        .feature-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
            border-color: var(--primary);
        }
        .feature-card.card-middle {
            border: 2px solid var(--primary);
            transform: translateY(-14px);
            box-shadow: var(--shadow-hover);
        }
        .feature-card.card-middle:hover { transform: translateY(-16px); }

        .feature-icon {
            width: 52px;
            height: 52px;
            border-radius: 13px;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 18px;
        }
        .feature-card h3 { font-size: 18px; font-weight: 600; color: var(--text); margin-bottom: 10px; }
        .feature-card p { font-size: 14px; color: var(--text-muted); line-height: 1.8; margin-bottom: 16px; }
        .feature-card > a { font-size: 14px; font-weight: 600; }
        .feature-card > a:hover { text-decoration: underline; }

        /* ========== 场景演示 ========== */
        .scene-row { margin-bottom: 0; }
        .scene-image {
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-hover);
            background: var(--border);
        }
        .scene-image img {
            width: 100%;
            height: 300px;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .scene-image:hover img { transform: scale(1.03); }

        .scene-text { padding: 12px 0; }
        .scene-text h2 { font-size: 26px; font-weight: 700; color: var(--text); line-height: 1.3; margin-bottom: 18px; }
        .scene-text p { font-size: 15px; line-height: 1.9; color: var(--text-body); margin-bottom: 20px; }

        .point-list { display: flex; flex-direction: column; gap: 10px; }
        .point-list li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 15px;
            color: var(--text);
            font-weight: 500;
        }
        .point-list i { color: var(--primary); font-size: 16px; }

        /* ========== 社会认同 ========== */
        .stats-section { background: #fff; }

        .stats-bar {
            background: var(--primary-light);
            border-radius: var(--radius);
            padding: 40px 32px;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
            margin-bottom: 56px;
            border: 1px solid rgba(43, 108, 212, 0.08);
        }
        .stat-item { display: flex; flex-direction: column; justify-content: center; }
        .stat-number {
            font-size: 34px;
            font-weight: 700;
            color: var(--accent);
            font-variant-numeric: tabular-nums;
            line-height: 1.2;
            margin-bottom: 4px;
        }
        .stat-number span { font-size: 20px; }
        .stat-label { font-size: 13px; color: var(--text-muted); font-weight: 500; }

        .testimonial-card {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 28px 26px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            height: 100%;
            transition: var(--transition);
            position: relative;
        }
        .testimonial-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-2px); }

        .quote-icon { color: var(--primary-mid); font-size: 26px; margin-bottom: 14px; }
        .testimonial-card > p { font-size: 14px; color: var(--text-body); line-height: 1.8; margin-bottom: 20px; }

        .testimonial-user { display: flex; align-items: center; gap: 12px; }
        .avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            font-weight: 600;
            flex-shrink: 0;
        }
        .avatar-gold { background: var(--accent); }
        .avatar-blue { background: var(--primary-dark); }
        .testimonial-user strong { display: block; font-size: 14px; color: var(--text); }
        .testimonial-user span { font-size: 12px; color: var(--text-muted); }
        .stars { margin-left: auto; color: var(--primary); font-size: 12px; display: flex; gap: 2px; }

        /* ========== 资讯列表 ========== */
        .news-list { max-width: 860px; margin: 0 auto; }

        .news-card {
            display: flex;
            gap: 22px;
            padding: 22px;
            background: var(--card-bg);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            margin-bottom: 16px;
            text-decoration: none;
            transition: var(--transition);
            align-items: center;
        }
        .news-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
            border-color: var(--primary);
            text-decoration: none;
        }

        .news-thumb {
            flex-shrink: 0;
            width: 130px;
            height: 92px;
            border-radius: 8px;
            overflow: hidden;
            background: var(--bg);
        }
        .news-thumb img { width: 100%; height: 100%; object-fit: cover; }

        .news-body { flex: 1; min-width: 0; }
        .news-body h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 6px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            line-height: 1.4;
            transition: var(--transition);
        }
        .news-card:hover .news-body h3 { color: var(--primary); }
        .news-body p {
            font-size: 14px;
            color: var(--text-muted);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            margin-bottom: 10px;
            line-height: 1.6;
        }

        .news-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            font-size: 13px;
            color: var(--text-muted);
            flex-wrap: wrap;
        }
        .tag {
            background: var(--primary-light);
            color: var(--primary);
            padding: 3px 10px;
            border-radius: 4px;
            font-size: 12px;
            font-weight: 600;
        }
        .read-more { color: var(--primary); font-weight: 600; margin-left: auto; font-size: 13px; }
        .read-more i { font-size: 11px; margin-left: 3px; transition: transform 0.2s ease; }
        .news-card:hover .read-more i { transform: translateX(3px); }

        .empty-state {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            padding: 64px 24px;
            border: 2px dashed var(--border);
            border-radius: var(--radius);
            background: var(--card-bg);
            color: var(--text-muted);
        }
        .empty-state i { font-size: 38px; margin-bottom: 14px; color: #C5CDD9; }
        .empty-state p { font-size: 16px; }

        /* ========== FAQ ========== */
        .faq-list { max-width: 780px; margin: 0 auto; list-style: none; }

        .faq-list .accordion-item {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 10px;
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-list .accordion-item.is-active { border-color: var(--primary); box-shadow: 0 4px 16px rgba(43, 108, 212, 0.08); }

        .faq-list .accordion-title {
            display: flex;
            align-items: center;
            padding: 18px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            background: transparent;
            border: none;
            transition: var(--transition);
            line-height: 1.4;
        }
        .faq-list .accordion-title:hover { color: var(--primary); background: var(--bg); }
        .faq-list .accordion-title .q-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 700;
            margin-right: 14px;
            flex-shrink: 0;
        }
        .faq-list .accordion-item.is-active .accordion-title { color: var(--primary); }
        .faq-list .accordion-item.is-active .accordion-title .q-icon { background: var(--primary); color: #fff; }

        .faq-list .accordion-content {
            padding: 12px 24px 22px 66px;
            color: var(--text-body);
            font-size: 15px;
            border-top: 1px solid var(--border);
            background: var(--bg);
            line-height: 1.85;
        }

        /* ========== CTA ========== */
        .cta-section { padding-bottom: 0; }

        .cta-box {
            background: var(--primary);
            border-radius: 16px;
            padding: 52px 48px;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .cta-box::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -10%;
            width: 280px;
            height: 280px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
        }
        .cta-box h2 { color: #fff; font-size: 28px; margin-bottom: 12px; position: relative; z-index: 1; }
        .cta-box p { color: rgba(255, 255, 255, 0.88); margin-bottom: 30px; font-size: 16px; position: relative; z-index: 1; }
        .cta-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; position: relative; z-index: 1; }

        /* ========== 页脚 ========== */
        .site-footer {
            background: var(--footer-bg);
            color: rgba(255, 255, 255, 0.72);
            padding: 60px 0 24px;
            margin-top: 96px;
        }
        .site-footer h4 {
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 18px;
            letter-spacing: 0.3px;
        }
        .site-footer ul li { margin-bottom: 10px; font-size: 14px; display: flex; align-items: center; gap: 8px; }
        .site-footer ul a { color: rgba(255, 255, 255, 0.68); text-decoration: none; transition: var(--transition); }
        .site-footer ul a:hover { color: var(--accent); }

        .footer-brand .footer-logo {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            display: block;
            margin-bottom: 14px;
        }
        .footer-brand p { font-size: 14px; line-height: 1.8; color: rgba(255, 255, 255, 0.6); }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 22px;
            margin-top: 44px;
            text-align: center;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.5);
        }

        /* ========== 底部固定转化条 ========== */
        .convert-bar {
            position: fixed;
            bottom: 0;
            left: var(--sidebar-width);
            right: 0;
            height: 64px;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border-top: 1px solid var(--border);
            box-shadow: 0 -4px 24px rgba(15, 23, 42, 0.06);
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 32px;
            z-index: 800;
        }
        .convert-bar p { font-size: 14px; color: var(--text); font-weight: 500; }

        /* ========== 响应式 ========== */
        @media (max-width: 1024px) {
            .side-nav { display: none; }
            .main-area { margin-left: 0; }
            .mobile-header { display: flex; }
            .convert-bar { left: 0; }
            .section { padding: 72px 0; }
            .site-footer { margin-top: 72px; }
        }

        @media (max-width: 768px) {
            .stats-bar { grid-template-columns: repeat(2, 1fr); gap: 32px 20px; }
            .feature-card.card-middle { transform: none; margin-bottom: 20px; }
            .scene-image img { height: 220px; }
            .hero { min-height: 440px; }
            .hero-content { padding: 60px 0 50px; }
            .section-head { margin-bottom: 40px; }
        }

        @media (max-width: 640px) {
            .section { padding: 56px 0; }
            .hero { min-height: 400px; }
            .hero h1 { font-size: 28px; }
            .hero-sub { font-size: 15px; }
            .hero-actions { flex-direction: column; align-items: stretch; }
            .hero-actions .btn { width: 100%; }
            .scroll-indicator { display: none; }

            .section-head h2 { font-size: 24px; }
            .section-head p { font-size: 14px; }

            .stats-bar { padding: 30px 20px; }
            .stat-number { font-size: 28px; }

            .news-card { flex-direction: column; align-items: flex-start; }
            .news-thumb { width: 100%; height: 160px; }
            .news-body h3 { white-space: normal; -webkit-line-clamp: 2; }
            .news-body p { white-space: normal; -webkit-line-clamp: 2; }

            .faq-list .accordion-title { font-size: 14px; padding: 16px 18px; }
            .faq-list .accordion-content { padding: 10px 18px 18px 48px; font-size: 14px; }

            .cta-box { padding: 36px 24px; }
            .cta-box h2 { font-size: 24px; }
            .cta-actions .btn { width: 100%; }

            .site-footer { padding: 48px 0 20px; }
            .footer-bottom { font-size: 13px; }

            .convert-bar { height: 56px; padding: 0 16px; }
            .convert-bar p { display: none; }
            .convert-bar .btn { width: 100%; }

            .feature-card { max-width: 100%; }
        }

        @media (min-width: 1025px) {
            .drawer, .drawer-overlay { display: none !important; }
        }

/* roulang page: article */
:root {
            --primary: #2B6CD4;
            --primary-dark: #2053A6;
            --primary-light: rgba(43, 108, 212, 0.10);
            --accent: #E8A33D;
            --accent-dark: #D18A2C;
            --bg: #F5F7FA;
            --card-bg: #FFFFFF;
            --text: #1E2A3A;
            --text-body: #4A5568;
            --text-light: #8A94A6;
            --border: #E3E8EF;
            --footer-bg: #14213D;
            --success: #10B981;
            --danger: #EF4444;
            --warning: #F59E0B;
            --radius: 12px;
            --radius-sm: 8px;
            --shadow: 0 1px 3px rgba(15, 23, 42, 0.06);
            --shadow-lg: 0 12px 32px rgba(15, 23, 42, 0.10);
            --transition: all 0.25s ease;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            background: var(--bg);
            color: var(--text-body);
            font-size: 16px;
            line-height: 1.8;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }
        ul,
        ol {
            list-style-position: inside;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .app-shell {
            display: flex;
            min-height: 100vh;
        }
        .side-nav {
            position: fixed;
            top: 0;
            left: 0;
            width: 88px;
            height: 100vh;
            background: #FAFBFC;
            border-right: 1px solid var(--border);
            z-index: 100;
            display: flex;
            flex-direction: column;
            transition: transform 0.3s ease, width 0.3s ease;
        }
        .side-nav-inner {
            display: flex;
            flex-direction: column;
            height: 100%;
        }
        .main-content {
            flex: 1;
            margin-left: 88px;
            min-width: 0;
            padding-bottom: 90px;
        }
        .side-logo {
            height: 64px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 3px;
            border-bottom: 1px solid var(--border);
            flex-shrink: 0;
            padding: 0 8px;
        }
        .logo-link {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 3px;
        }
        .logo-badge {
            width: 28px;
            height: 28px;
            border-radius: 8px;
            background: var(--primary);
            color: #fff;
            font-size: 13px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 2px 6px rgba(43, 108, 212, 0.3);
        }
        .logo-text {
            font-size: 10px;
            font-weight: 700;
            color: var(--text);
            white-space: nowrap;
            letter-spacing: 0.3px;
        }
        .side-nav-items {
            display: flex;
            flex-direction: column;
            padding: 16px 8px;
            gap: 4px;
            flex: 1;
        }
        .nav-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            padding: 12px 4px;
            border-radius: 8px;
            color: var(--text-body);
            font-size: 10px;
            font-weight: 500;
            text-decoration: none;
            border-left: 3px solid transparent;
            gap: 4px;
            transition: var(--transition);
            text-align: center;
        }
        .nav-item i {
            font-size: 17px;
        }
        .nav-item:hover {
            background: rgba(43, 108, 212, 0.08);
            color: var(--primary);
        }
        .nav-item.active {
            background: rgba(43, 108, 212, 0.10);
            color: var(--primary);
            border-left-color: var(--primary);
            font-weight: 600;
        }
        .side-nav-bottom {
            padding: 16px 8px;
            border-top: 1px solid var(--border);
            text-align: center;
            flex-shrink: 0;
        }
        .side-nav-bottom .mini-copy {
            font-size: 9px;
            color: var(--text-light);
            line-height: 1.4;
        }
        .side-nav-close {
            display: none;
            position: absolute;
            top: 14px;
            right: 14px;
            width: 36px;
            height: 36px;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
            background: #F1F5F9;
            color: var(--text);
            font-size: 16px;
            z-index: 10;
            transition: var(--transition);
        }
        .side-nav-close:hover {
            background: rgba(43, 108, 212, 0.1);
            color: var(--primary);
        }
        .mobile-topbar {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 60px;
            background: #fff;
            border-bottom: 1px solid var(--border);
            z-index: 99;
            align-items: center;
            justify-content: space-between;
            padding: 0 16px;
            box-shadow: 0 1px 3px rgba(15, 23, 42, 0.04);
        }
        .mobile-logo {
            font-weight: 700;
            font-size: 17px;
            color: var(--text);
        }
        .mobile-logo .logo-dot {
            color: var(--primary);
        }
        .hamburger-btn {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
            color: var(--text);
            font-size: 18px;
            transition: var(--transition);
        }
        .hamburger-btn:hover {
            background: rgba(43, 108, 212, 0.08);
            color: var(--primary);
        }
        .nav-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(20, 33, 61, 0.4);
            z-index: 98;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            height: 44px;
            padding: 0 24px;
            border-radius: 8px;
            font-size: 15px;
            font-weight: 600;
            text-decoration: none;
            transition: var(--transition);
            border: 1.5px solid transparent;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(43, 108, 212, 0.25);
        }
        .btn-outline {
            background: #fff;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-outline:hover {
            background: rgba(43, 108, 212, 0.08);
        }
        .btn-gold {
            background: var(--accent);
            color: #fff;
            border-color: var(--accent);
        }
        .btn-gold:hover {
            background: var(--accent-dark);
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(232, 163, 61, 0.3);
        }
        .btn-sm {
            height: 38px;
            padding: 0 18px;
            font-size: 14px;
        }
        .breadcrumb-section {
            padding: 22px 0 10px;
            border-bottom: 1px solid var(--border);
            background: #fff;
        }
        .breadcrumb-nav {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--text-light);
            flex-wrap: wrap;
        }
        .breadcrumb-nav a {
            color: var(--text-light);
            font-weight: 500;
        }
        .breadcrumb-nav a:hover {
            color: var(--primary);
        }
        .breadcrumb-nav .sep {
            font-size: 12px;
            color: var(--border);
        }
        .breadcrumb-nav .current {
            color: var(--text);
            font-weight: 600;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            max-width: 300px;
        }
        .article-main-section {
            padding: 40px 0 56px;
        }
        .article-detail-wrap {
            max-width: 900px;
            margin: 0 auto;
        }
        .article-detail-card {
            background: #fff;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 48px;
        }
        .article-detail-header {
            border-bottom: 1px solid var(--border);
            padding-bottom: 24px;
            margin-bottom: 32px;
        }
        .article-title {
            font-size: 30px;
            line-height: 1.35;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 16px;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            color: var(--text-light);
            font-size: 14px;
            align-items: center;
        }
        .meta-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .meta-tag {
            display: inline-flex;
            align-items: center;
            background: rgba(43, 108, 212, 0.10);
            color: var(--primary);
            padding: 3px 10px;
            border-radius: 4px;
            font-size: 12px;
            font-weight: 600;
        }
        .article-body {
            font-size: 16px;
            line-height: 1.9;
            color: var(--text-body);
        }
        .article-body h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text);
            margin: 36px 0 16px;
            padding-bottom: 10px;
            border-bottom: 1px solid var(--border);
        }
        .article-body h3 {
            font-size: 19px;
            font-weight: 600;
            color: var(--text);
            margin: 28px 0 12px;
        }
        .article-body p {
            margin-bottom: 18px;
        }
        .article-body ul,
        .article-body ol {
            margin: 16px 0 24px;
            padding-left: 22px;
        }
        .article-body li {
            margin-bottom: 8px;
        }
        .article-body blockquote {
            background: #F8FAFC;
            border-left: 3px solid var(--primary);
            padding: 16px 20px;
            border-radius: 0 8px 8px 0;
            color: var(--text);
            font-style: normal;
            margin: 24px 0;
        }
        .article-body img {
            border-radius: 8px;
            max-width: 100%;
            margin: 24px 0;
        }
        .article-body a {
            color: var(--primary);
            font-weight: 600;
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .article-body a:hover {
            color: var(--primary-dark);
        }
        .article-not-found {
            background: #fff;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 80px 32px;
            text-align: center;
            max-width: 900px;
            margin: 0 auto;
        }
        .not-found-icon {
            width: 72px;
            height: 72px;
            margin: 0 auto 24px;
            border-radius: 50%;
            background: rgba(43, 108, 212, 0.08);
            color: var(--primary);
            font-size: 30px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .article-not-found h2 {
            font-size: 24px;
            color: var(--text);
            margin-bottom: 12px;
        }
        .article-not-found p {
            color: var(--text-light);
            margin-bottom: 28px;
        }
        .related-section {
            padding: 56px 0 72px;
        }
        .section-heading {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 28px;
            flex-wrap: wrap;
            gap: 12px;
        }
        .section-heading h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text);
        }
        .section-heading a {
            color: var(--primary);
            font-weight: 600;
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .related-card {
            background: #fff;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: var(--transition);
            height: 100%;
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .related-card-img {
            height: 160px;
            overflow: hidden;
            background: #E8ECF0;
        }
        .related-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .related-card:hover .related-card-img img {
            transform: scale(1.05);
        }
        .related-card-body {
            padding: 20px 24px 24px;
        }
        .related-card-body h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 8px;
        }
        .related-card-body p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
            margin-bottom: 12px;
        }
        .related-card-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .related-card-link:hover {
            color: var(--primary-dark);
        }
        .cta-band {
            padding: 80px 0;
            background: linear-gradient(135deg, rgba(43, 108, 212, 0.92), rgba(43, 108, 212, 0.78)), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            position: relative;
        }
        .cta-content {
            max-width: 640px;
            color: #fff;
        }
        .cta-content h2 {
            font-size: 32px;
            line-height: 1.3;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .cta-content p {
            font-size: 16px;
            margin-bottom: 28px;
            opacity: 0.9;
        }
        .cta-content .btn-primary {
            background: #fff;
            color: var(--primary);
            border-color: #fff;
        }
        .cta-content .btn-primary:hover {
            background: #F1F5F9;
            transform: translateY(-1px);
        }
        .site-footer {
            background: var(--footer-bg);
            color: #A7B0C2;
            padding: 64px 0 0;
        }
        .footer-brand {
            margin-bottom: 24px;
        }
        .footer-logo {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            display: block;
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: #A7B0C2;
        }
        .site-footer h4 {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }
        .site-footer ul {
            list-style: none;
        }
        .site-footer ul li {
            margin-bottom: 10px;
            font-size: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .site-footer ul a {
            color: #A7B0C2;
            font-size: 14px;
        }
        .site-footer ul a:hover {
            color: #fff;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 24px 0;
            margin-top: 48px;
            text-align: center;
            font-size: 13px;
            color: #6B7A93;
        }
        .convert-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            height: 64px;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(8px);
            border-top: 1px solid var(--border);
            box-shadow: 0 -2px 12px rgba(15, 23, 42, 0.06);
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 24px;
            z-index: 90;
        }
        .convert-bar p {
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            margin: 0;
        }
        .convert-bar p span {
            color: var(--primary);
        }
        .convert-bar .btn-gold {
            height: 40px;
            font-size: 14px;
        }
        @media (max-width: 1024px) {
            .side-nav {
                width: 280px;
                transform: translateX(-100%);
                box-shadow: 6px 0 30px rgba(15, 23, 42, 0.15);
            }
            .side-nav.open {
                transform: translateX(0);
            }
            .main-content {
                margin-left: 0;
                padding-top: 60px;
            }
            .mobile-topbar {
                display: flex;
            }
            .nav-overlay.show {
                display: block;
            }
            .side-logo {
                flex-direction: row;
                justify-content: flex-start;
                padding: 0 20px;
                height: 60px;
                gap: 10px;
                border-bottom: 1px solid var(--border);
            }
            .logo-badge {
                width: 34px;
                height: 34px;
                font-size: 16px;
            }
            .logo-text {
                font-size: 18px;
            }
            .side-nav-items {
                padding: 20px 16px;
            }
            .nav-item {
                flex-direction: row;
                justify-content: flex-start;
                padding: 14px 16px;
                font-size: 15px;
                gap: 12px;
            }
            .nav-item i {
                font-size: 18px;
                width: 24px;
                text-align: center;
            }
            .side-nav-bottom {
                padding: 16px 20px;
                text-align: left;
            }
            .side-nav-bottom .mini-copy {
                font-size: 12px;
            }
            .side-nav-close {
                display: flex;
            }
        }
        @media (max-width: 640px) {
            .container {
                padding: 0 16px;
            }
            .article-detail-card {
                padding: 24px 20px;
            }
            .article-title {
                font-size: 24px;
            }
            .article-meta {
                gap: 12px;
                flex-direction: column;
                align-items: flex-start;
            }
            .article-main-section {
                padding: 24px 0 40px;
            }
            .related-section {
                padding: 40px 0 56px;
            }
            .section-heading h2 {
                font-size: 22px;
            }
            .cta-band {
                padding: 56px 0;
            }
            .cta-content h2 {
                font-size: 26px;
            }
            .convert-bar p {
                display: none;
            }
            .convert-bar {
                justify-content: flex-end;
                padding: 0 16px;
            }
            .site-footer {
                padding: 48px 0 0;
            }
            .footer-bottom {
                margin-top: 32px;
                padding: 20px 16px;
            }
            .breadcrumb-nav .current {
                max-width: 160px;
            }
            .breadcrumb-nav {
                gap: 6px;
                font-size: 13px;
            }
        }
        @media (max-width: 520px) {
            .article-title {
                font-size: 22px;
            }
            .article-body {
                font-size: 15px;
                line-height: 1.85;
            }
            .btn {
                height: 40px;
                padding: 0 18px;
                font-size: 14px;
            }
            .cta-content .btn-primary {
                height: 40px;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #2B6CD4;
            --primary-dark: #1E55B8;
            --primary-light: rgba(43, 108, 212, 0.10);
            --primary-light-2: rgba(43, 108, 212, 0.06);
            --accent: #E8A33D;
            --accent-dark: #D18A2C;
            --bg: #F5F7FA;
            --card-bg: #FFFFFF;
            --text-heading: #1E2A3A;
            --text-body: #4A5568;
            --text-muted: #8A94A6;
            --border: #E3E8EF;
            --radius: 12px;
            --radius-sm: 8px;
            --shadow: 0 1px 3px rgba(15, 23, 42, 0.06);
            --shadow-hover: 0 12px 32px rgba(15, 23, 42, 0.10);
            --sidebar-width: 88px;
            --sidebar-expanded: 240px;
            --topbar-height: 64px;
            --transition: 0.3s ease;
            --footer-bg: #14213D;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-body);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease;
        }

        a:hover,
        a:focus {
            color: var(--primary);
        }

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

        ul,
        ol {
            list-style: none;
        }

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ---------- Buttons ---------- */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 44px;
            padding: 0 24px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            line-height: 1;
            white-space: nowrap;
            transition: all 0.25s ease;
            border: 1.5px solid transparent;
        }

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

        .btn-primary:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 6px 18px rgba(43, 108, 212, 0.25);
        }

        .btn-outline {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }

        .btn-outline:hover {
            background: var(--primary-light);
            color: var(--primary);
        }

        .btn-accent {
            background: var(--accent);
            color: #fff;
        }

        .btn-accent:hover {
            background: var(--accent-dark);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 6px 18px rgba(232, 163, 61, 0.30);
        }

        .btn:focus-visible {
            outline: 3px solid rgba(43, 108, 212, 0.35);
            outline-offset: 2px;
        }

        /* ---------- Side Nav ---------- */
        .side-nav {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: #FAFBFC;
            border-right: 1px solid var(--border);
            z-index: 1000;
            display: flex;
            flex-direction: column;
            transition: width 0.35s ease;
            overflow: hidden;
        }

        .side-nav:hover {
            width: var(--sidebar-expanded);
            box-shadow: 4px 0 24px rgba(15, 23, 42, 0.04);
        }

        .side-logo {
            height: var(--topbar-height);
            display: flex;
            align-items: center;
            justify-content: center;
            border-bottom: 1px solid var(--border);
            flex-shrink: 0;
            position: relative;
        }

        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 0 12px;
            white-space: nowrap;
        }

        .logo-badge {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: var(--primary);
            color: #fff;
            font-size: 20px;
            font-weight: 800;
            flex-shrink: 0;
            box-shadow: 0 2px 8px rgba(43, 108, 212, 0.3);
        }

        .logo-text {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-heading);
            opacity: 0;
            transition: opacity 0.3s ease;
            white-space: nowrap;
        }

        .side-nav:hover .logo-text {
            opacity: 1;
        }

        .side-nav-items {
            flex: 1;
            padding: 16px 8px;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .nav-item {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 12px 12px;
            border-radius: var(--radius-sm);
            color: var(--text-body);
            font-size: 15px;
            font-weight: 500;
            white-space: nowrap;
            border-left: 3px solid transparent;
            transition: background 0.25s ease, color 0.25s ease, border-color 0.25s ease;
            position: relative;
        }

        .nav-item i {
            font-size: 18px;
            width: 22px;
            text-align: center;
            flex-shrink: 0;
            color: var(--text-muted);
            transition: color 0.25s ease;
        }

        .nav-item span {
            opacity: 0;
            transition: opacity 0.3s ease;
            white-space: nowrap;
        }

        .side-nav:hover .nav-item span {
            opacity: 1;
        }

        .nav-item:hover {
            background: var(--primary-light-2);
            color: var(--primary);
        }

        .nav-item:hover i {
            color: var(--primary);
        }

        .nav-item.active {
            background: var(--primary-light);
            color: var(--primary);
            border-left-color: var(--primary);
            font-weight: 600;
        }

        .nav-item.active i {
            color: var(--primary);
        }

        /* ---------- Mobile Topbar ---------- */
        .mobile-topbar {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--topbar-height);
            background: #fff;
            border-bottom: 1px solid var(--border);
            align-items: center;
            justify-content: space-between;
            padding: 0 16px;
            z-index: 999;
            box-shadow: 0 1px 4px rgba(15, 23, 42, 0.04);
        }

        .topbar-logo a {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-heading);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .topbar-logo .logo-badge {
            width: 30px;
            height: 30px;
            font-size: 16px;
            border-radius: 8px;
        }

        .hamburger-btn {
            width: 42px;
            height: 42px;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-heading);
            font-size: 20px;
            background: var(--bg);
            transition: background 0.25s ease;
        }

        .hamburger-btn:hover {
            background: var(--primary-light);
            color: var(--primary);
        }

        /* ---------- Drawer ---------- */
        .drawer-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(15, 23, 42, 0.55);
            z-index: 1001;
            opacity: 0;
            transition: opacity 0.3s ease;
            pointer-events: none;
        }

        .drawer-overlay.show {
            opacity: 1;
            pointer-events: auto;
        }

        .mobile-drawer {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 280px;
            height: 100vh;
            background: #FAFBFC;
            z-index: 1002;
            transform: translateX(-100%);
            transition: transform 0.35s ease;
            flex-direction: column;
            box-shadow: 8px 0 32px rgba(15, 23, 42, 0.15);
        }

        .mobile-drawer.open {
            transform: translateX(0);
        }

        .drawer-header {
            height: var(--topbar-height);
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 20px;
            border-bottom: 1px solid var(--border);
            background: #fff;
        }

        .drawer-logo {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-heading);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .drawer-close {
            width: 36px;
            height: 36px;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-body);
            font-size: 18px;
            background: var(--bg);
        }

        .drawer-close:hover {
            background: #fee2e2;
            color: #dc2626;
        }

        .drawer-nav {
            flex: 1;
            padding: 20px;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .drawer-nav .nav-item {
            padding: 14px 14px;
            border-radius: 10px;
            opacity: 1;
        }

        .drawer-nav .nav-item span {
            opacity: 1;
        }

        .drawer-nav .nav-item i {
            color: var(--text-muted);
        }

        .drawer-nav .nav-item.active {
            background: var(--primary-light);
            color: var(--primary);
            border-left-color: var(--primary);
        }

        .drawer-footer {
            padding: 20px;
            border-top: 1px solid var(--border);
            text-align: center;
        }

        .drawer-footer p {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* ---------- Main Wrapper ---------- */
        .main-wrapper {
            margin-left: var(--sidebar-width);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            padding-bottom: 80px;
        }

        /* ---------- Page Banner ---------- */
        .page-banner {
            background:
                linear-gradient(90deg, rgba(255, 255, 255, 0.95) 0%, rgba(248, 250, 253, 0.88) 50%, rgba(237, 242, 250, 0.75) 100%),
                url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            border-bottom: 1px solid var(--border);
            padding: 72px 0 56px;
            position: relative;
            overflow: hidden;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 24px;
        }

        .breadcrumb a {
            color: var(--text-muted);
            transition: color 0.2s;
        }

        .breadcrumb a:hover {
            color: var(--primary);
        }

        .breadcrumb .separator {
            color: var(--text-muted);
            font-size: 12px;
        }

        .breadcrumb .current {
            color: var(--primary);
            font-weight: 500;
        }

        .page-banner h1 {
            font-size: clamp(30px, 4vw, 42px);
            font-weight: 700;
            line-height: 1.25;
            color: var(--text-heading);
            margin-bottom: 16px;
        }

        .page-banner .banner-desc {
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-body);
            max-width: 560px;
        }

        /* ---------- Timeline Section ---------- */
        .timeline-section {
            padding: 72px 0 48px;
        }

        .section-head {
            text-align: center;
            margin-bottom: 56px;
        }

        .section-head .section-kicker {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent);
            background: rgba(232, 163, 61, 0.12);
            padding: 4px 16px;
            border-radius: 20px;
            letter-spacing: 1px;
            margin-bottom: 12px;
        }

        .section-head h2 {
            font-size: clamp(26px, 3vw, 32px);
            font-weight: 700;
            color: var(--text-heading);
            line-height: 1.3;
            margin-bottom: 12px;
        }

        .section-head p {
            font-size: 15px;
            color: var(--text-muted);
            max-width: 520px;
            margin: 0 auto;
        }

        .timeline {
            position: relative;
            padding-left: 44px;
            max-width: 860px;
            margin: 0 auto;
        }

        .timeline::before {
            content: '';
            position: absolute;
            left: 12px;
            top: 8px;
            bottom: 8px;
            width: 2px;
            background: linear-gradient(to bottom, var(--primary) 0%, var(--primary) 70%, var(--accent) 100%);
            border-radius: 2px;
        }

        .timeline-item {
            position: relative;
            margin-bottom: 36px;
        }

        .timeline-item::before {
            content: '';
            position: absolute;
            left: -32px;
            top: 28px;
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background: #fff;
            border: 3px solid var(--primary);
            box-shadow: 0 0 0 4px rgba(43, 108, 212, 0.15);
            z-index: 1;
        }

        .timeline-item:last-child::before {
            border-color: var(--accent);
            box-shadow: 0 0 0 4px rgba(232, 163, 61, 0.18);
        }

        .timeline-card {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 28px 30px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            transition: all 0.35s ease;
            position: relative;
        }

        .timeline-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
            border-color: rgba(43, 108, 212, 0.30);
        }

        .timeline-step {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 12px;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-light);
            padding: 3px 14px;
            border-radius: 16px;
            margin-bottom: 12px;
        }

        .timeline-card h3 {
            font-size: 19px;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 10px;
            line-height: 1.4;
        }

        .timeline-card p {
            font-size: 15px;
            line-height: 1.9;
            color: var(--text-body);
            margin-bottom: 0;
        }

        /* ---------- Brand Values ---------- */
        .values-section {
            padding: 48px 0 64px;
            background: var(--card-bg);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .values-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
            max-width: 1020px;
            margin: 0 auto;
        }

        .value-card {
            text-align: center;
            padding: 40px 28px;
            border-radius: var(--radius);
            border: 1px solid var(--border);
            background: var(--card-bg);
            transition: all 0.35s ease;
        }

        .value-card:nth-child(2) {
            border-color: rgba(43, 108, 212, 0.35);
            box-shadow: 0 4px 20px rgba(43, 108, 212, 0.08);
            transform: translateY(-6px);
        }

        .value-card:nth-child(2):hover {
            transform: translateY(-10px);
            box-shadow: 0 16px 40px rgba(43, 108, 212, 0.12);
        }

        .value-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
            border-color: rgba(43, 108, 212, 0.3);
        }

        .value-icon {
            width: 64px;
            height: 64px;
            border-radius: 18px;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 26px;
            color: var(--primary);
            transition: all 0.3s ease;
        }

        .value-card:nth-child(2) .value-icon {
            background: rgba(232, 163, 61, 0.15);
            color: var(--accent);
        }

        .value-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 12px;
        }

        .value-card p {
            font-size: 14px;
            line-height: 1.8;
            color: var(--text-muted);
            margin-bottom: 0;
        }

        /* ---------- CTA Section ---------- */
        .cta-section {
            padding: 72px 0;
            background: var(--primary-light-2);
            text-align: center;
        }

        .cta-inner {
            max-width: 680px;
            margin: 0 auto;
        }

        .cta-inner h2 {
            font-size: clamp(24px, 3vw, 30px);
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 14px;
        }

        .cta-inner p {
            font-size: 16px;
            color: var(--text-body);
            line-height: 1.8;
            margin-bottom: 28px;
        }

        .cta-inner .btn {
            margin: 0 6px;
        }

        /* ---------- FAQ Accordion ---------- */
        .faq-section {
            padding: 72px 0 60px;
        }

        .faq-accordion {
            max-width: 760px;
            margin: 0 auto;
        }

        .faq-accordion .accordion-item {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 10px;
            margin-bottom: 12px;
            transition: border-color 0.3s ease, box-shadow 0.3s ease;
            overflow: hidden;
        }

        .faq-accordion .accordion-item.is-active {
            border-color: rgba(43, 108, 212, 0.4);
            box-shadow: 0 4px 16px rgba(43, 108, 212, 0.06);
        }

        .faq-accordion .accordion-title {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 18px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-heading);
            line-height: 1.4;
            background: transparent;
            border-radius: 10px;
            transition: color 0.25s ease;
        }

        .faq-accordion .accordion-title::before {
            content: '?';
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 26px;
            height: 26px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 700;
            flex-shrink: 0;
            transition: background 0.3s ease, color 0.3s ease;
        }

        .faq-accordion .accordion-item.is-active .accordion-title::before {
            background: var(--primary);
            color: #fff;
        }

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

        .faq-accordion .accordion-content {
            padding: 4px 24px 22px 62px;
            font-size: 15px;
            line-height: 1.9;
            color: var(--text-body);
            border-top: 1px solid var(--bg);
        }

        /* ---------- Footer ---------- */
        .site-footer {
            background: var(--footer-bg);
            color: #C7D2E8;
            padding: 64px 0 32px;
            margin-top: auto;
        }

        .site-footer .footer-brand .footer-logo {
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            display: block;
            margin-bottom: 14px;
            letter-spacing: 1px;
        }

        .site-footer .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: #8E9AB8;
            max-width: 300px;
            margin-bottom: 0;
        }

        .site-footer h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 10px;
        }

        .site-footer h4::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 28px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }

        .site-footer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .site-footer ul li {
            margin-bottom: 10px;
            font-size: 14px;
        }

        .site-footer ul li a {
            color: #8E9AB8;
            transition: color 0.25s ease, padding-left 0.25s ease;
        }

        .site-footer ul li a:hover {
            color: var(--accent);
            padding-left: 4px;
        }

        .site-footer ul li i {
            margin-right: 8px;
            color: var(--accent);
            font-size: 13px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            margin-top: 48px;
            padding-top: 24px;
            text-align: center;
        }

        .footer-bottom p {
            font-size: 13px;
            color: #7B88A6;
            margin-bottom: 0;
        }

        /* ---------- Fixed Bottom Bar ---------- */
        .fixed-cta {
            position: fixed;
            bottom: 0;
            left: var(--sidebar-width);
            right: 0;
            height: 64px;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(8px);
            border-top: 1px solid var(--border);
            box-shadow: 0 -4px 20px rgba(15, 23, 42, 0.06);
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 32px;
            z-index: 500;
        }

        .fixed-cta .cta-text {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-heading);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .fixed-cta .cta-text i {
            color: var(--accent);
        }

        .fixed-cta .btn {
            height: 40px;
            padding: 0 20px;
            font-size: 14px;
        }

        /* ---------- Responsive ---------- */
        @media screen and (max-width: 1024px) {
            .side-nav {
                display: none;
            }

            .mobile-topbar {
                display: flex;
            }

            .mobile-drawer,
            .drawer-overlay {
                display: flex;
            }

            .main-wrapper {
                margin-left: 0;
                padding-top: var(--topbar-height);
            }

            .fixed-cta {
                left: 0;
            }

            .page-banner {
                padding: 48px 0 40px;
            }

            .page-banner h1 {
                font-size: 28px;
            }
        }

        @media screen and (max-width: 768px) {
            .values-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .value-card:nth-child(2) {
                transform: none;
            }

            .value-card:nth-child(2):hover {
                transform: translateY(-2px);
            }

            .timeline {
                padding-left: 32px;
            }

            .timeline-item::before {
                left: -26px;
                width: 12px;
                height: 12px;
            }

            .timeline-card {
                padding: 22px 20px;
            }

            .timeline-card h3 {
                font-size: 17px;
            }

            .timeline-card p {
                font-size: 14px;
            }

            .fixed-cta {
                padding: 0 16px;
            }

            .fixed-cta .cta-text {
                display: none;
            }

            .fixed-cta .btn {
                width: 100%;
            }

            .cta-inner .btn {
                margin: 6px;
                width: calc(100% - 12px);
            }
        }

        @media screen and (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .page-banner {
                padding: 36px 0 32px;
            }

            .page-banner h1 {
                font-size: 24px;
            }

            .page-banner .banner-desc {
                font-size: 14px;
            }

            .section-head {
                margin-bottom: 40px;
            }

            .timeline-section {
                padding: 48px 0 32px;
            }

            .timeline {
                padding-left: 24px;
            }

            .timeline-item::before {
                left: -19px;
                width: 10px;
                height: 10px;
                border-width: 2px;
            }

            .timeline-step {
                font-size: 11px;
                padding: 2px 10px;
            }

            .values-section {
                padding: 40px 0 48px;
            }

            .value-card {
                padding: 28px 20px;
            }

            .faq-accordion .accordion-title {
                padding: 16px 18px;
                font-size: 15px;
            }

            .faq-accordion .accordion-content {
                padding: 4px 18px 18px 48px;
                font-size: 14px;
            }

            .site-footer {
                padding: 48px 0 24px;
            }

            .footer-bottom {
                margin-top: 32px;
                padding-top: 20px;
            }

            .fixed-cta {
                height: 56px;
            }

            .main-wrapper {
                padding-bottom: 72px;
            }
        }

/* roulang page: category2 */
:root {
    --primary: #2B6CD4;
    --primary-dark: #1E55B8;
    --primary-light: rgba(43,108,212,0.10);
    --accent: #E8A33D;
    --accent-dark: #D18A2C;
    --bg: #F5F7FA;
    --card-bg: #FFFFFF;
    --heading: #1E2A3A;
    --body: #4A5568;
    --muted: #8A94A6;
    --border: #E3E8EF;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow-sm: 0 1px 3px rgba(15,23,42,0.06);
    --shadow-lg: 0 12px 32px rgba(15,23,42,0.10);
    --transition: all 0.25s ease;
    --font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--font-family);
    background: var(--bg);
    color: var(--body);
    line-height: 1.8;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: var(--primary); transition: var(--transition); }
a:hover { color: var(--primary-dark); }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; }

/* ========== 左侧导航 ========== */
.app-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: 88px;
    height: 100vh;
    background: #FAFBFC;
    border-right: 1px solid var(--border);
    z-index: 200;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0 10px;
}
.side-logo {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 72px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 12px;
    width: 100%;
}
.logo-icon {
    width: 38px;
    height: 38px;
    background: var(--primary);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 17px;
    margin-bottom: 4px;
    box-shadow: 0 2px 8px rgba(43,108,212,0.25);
}
.logo-text {
    font-size: 13px;
    font-weight: 700;
    color: var(--heading);
    letter-spacing: 0.5px;
}
.side-nav-items {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 4px;
    flex: 1;
}
.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 12px 4px;
    border-radius: 10px;
    color: var(--muted);
    font-size: 12px;
    font-weight: 500;
    border-left: 3px solid transparent;
    transition: var(--transition);
    text-align: center;
    gap: 5px;
}
.nav-item i { font-size: 18px; }
.nav-item span { font-size: 12px; line-height: 1.2; }
.nav-item:hover {
    color: var(--primary);
    background: rgba(43,108,212,0.06);
}
.nav-item.active {
    color: var(--primary);
    background: var(--primary-light);
    border-left-color: var(--primary);
    font-weight: 600;
}
.nav-item.active i { color: var(--primary); }

/* ========== 移动端顶栏 ========== */
.mobile-topbar {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: #FAFBFC;
    border-bottom: 1px solid var(--border);
    z-index: 200;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
}
.mobile-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 15px;
    font-weight: 700;
    color: var(--heading);
}
.mobile-logo .logo-icon {
    width: 30px;
    height: 30px;
    font-size: 13px;
    margin-bottom: 0;
    border-radius: 8px;
}
.menu-toggle {
    width: 40px;
    height: 40px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: #fff;
    color: var(--heading);
    font-size: 17px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}
.menu-toggle:hover { border-color: var(--primary); color: var(--primary); }

/* 抽屉 */
.mobile-drawer {
    position: fixed;
    top: 0;
    left: -320px;
    width: 280px;
    height: 100vh;
    background: #FAFBFC;
    z-index: 300;
    transition: left 0.3s ease;
    display: flex;
    flex-direction: column;
    padding: 20px 16px;
    box-shadow: 4px 0 24px rgba(15,23,42,0.12);
}
.mobile-drawer.open { left: 0; }
.drawer-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 16px;
}
.drawer-logo {
    font-size: 17px;
    font-weight: 700;
    color: var(--heading);
}
.drawer-close {
    width: 34px;
    height: 34px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: #fff;
    color: var(--heading);
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}
.drawer-close:hover { border-color: var(--primary); color: var(--primary); }
.drawer-nav {
    display: flex;
    flex-direction: column;
    gap: 4px;
    flex: 1;
}
.drawer-nav a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 13px 16px;
    border-radius: 10px;
    color: var(--body);
    font-size: 15px;
    font-weight: 500;
    transition: var(--transition);
}
.drawer-nav a i { width: 20px; color: var(--muted); font-size: 16px; }
.drawer-nav a:hover { background: var(--primary-light); color: var(--primary); }
.drawer-nav a.active { background: var(--primary-light); color: var(--primary); font-weight: 600; }
.drawer-nav a.active i { color: var(--primary); }
.drawer-copyright {
    font-size: 12px;
    color: var(--muted);
    text-align: center;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}
.drawer-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15,23,42,0.5);
    z-index: 250;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}
.drawer-overlay.show { opacity: 1; visibility: visible; }

/* ========== 主内容 ========== */
.main-content {
    margin-left: 88px;
    min-height: 100vh;
    padding-bottom: 84px;
}
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ========== 页头区 ========== */
.category-hero {
    position: relative;
    background: linear-gradient(120deg, rgba(43,108,212,0.10), rgba(232,163,61,0.08)), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
    padding: 72px 0 64px;
    border-bottom: 1px solid var(--border);
}
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--muted);
    margin-bottom: 18px;
}
.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb i { font-size: 11px; }
.category-hero h1 {
    font-size: clamp(28px, 4vw, 42px);
    font-weight: 700;
    color: var(--heading);
    line-height: 1.25;
    margin-bottom: 16px;
    max-width: 740px;
}
.category-hero h1 span { color: var(--primary); }
.category-hero .hero-desc {
    font-size: 16px;
    color: var(--body);
    max-width: 680px;
    line-height: 1.9;
}

/* ========== 区块通用 ========== */
.section-block { padding: 72px 0; }
.section-header {
    text-align: center;
    max-width: 680px;
    margin: 0 auto 48px;
}
.section-header .eyebrow {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    color: var(--primary);
    background: var(--primary-light);
    border-radius: 20px;
    padding: 5px 16px;
    margin-bottom: 12px;
    letter-spacing: 0.5px;
}
.section-header h2 {
    font-size: clamp(24px, 3vw, 32px);
    font-weight: 700;
    color: var(--heading);
    line-height: 1.3;
    margin-bottom: 12px;
}
.section-header p {
    font-size: 15px;
    color: var(--muted);
    line-height: 1.8;
}

/* ========== 服务卡片网格 ========== */
.service-showcase { background: #fff; border-bottom: 1px solid var(--border); }
.service-showcase .section-block { padding: 72px 0; }
.service-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: var(--transition);
    height: 100%;
    display: flex;
    flex-direction: column;
}
.service-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
    border-color: var(--primary);
}
.service-card .card-img {
    height: 200px;
    overflow: hidden;
    position: relative;
    background: #E9EDF3;
}
.service-card .card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}
.service-card:hover .card-img img { transform: scale(1.04); }
.service-card .card-body { padding: 24px; flex: 1; display: flex; flex-direction: column; }
.card-tag {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    color: var(--primary);
    background: var(--primary-light);
    border-radius: 4px;
    padding: 3px 10px;
    margin-bottom: 12px;
    align-self: flex-start;
}
.service-card h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--heading);
    margin-bottom: 10px;
    line-height: 1.4;
}
.service-card p {
    font-size: 14px;
    color: var(--muted);
    line-height: 1.8;
    margin-bottom: 14px;
    flex: 1;
}
.service-card .card-link {
    font-size: 13px;
    font-weight: 600;
    color: var(--primary);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.service-card .card-link i { font-size: 11px; transition: transform 0.25s ease; }
.service-card .card-link:hover i { transform: translateX(4px); }
/* 小卡图标模式 */
.card-icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    background: var(--primary-light);
    color: var(--primary);
    font-size: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
}
.card-icon.accent {
    background: rgba(232,163,61,0.14);
    color: var(--accent-dark);
}

/* ========== 数据条带 ========== */
.stats-band {
    background: rgba(43,108,212,0.08);
    padding: 56px 0;
    border-bottom: 1px solid var(--border);
}
.stats-band .stat-item {
    text-align: center;
    padding: 16px 8px;
}
.stats-band .stat-num {
    font-size: 32px;
    font-weight: 700;
    color: var(--accent);
    display: block;
    font-variant-numeric: tabular-nums;
    line-height: 1.2;
    margin-bottom: 6px;
}
.stats-band .stat-label {
    font-size: 13px;
    color: var(--muted);
    font-weight: 500;
}
.stats-band .cell { border-right: 1px solid rgba(43,108,212,0.12); }
.stats-band .cell:last-child { border-right: none; }

/* ========== 服务流程 ========== */
.process-section { background: var(--bg); }
.process-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.process-item {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    padding: 28px 24px;
    text-align: center;
    transition: var(--transition);
    position: relative;
}
.process-item:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
}
.process-num {
    font-size: 14px;
    font-weight: 700;
    color: var(--accent);
    background: rgba(232,163,61,0.12);
    width: 34px;
    height: 34px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 14px;
    font-variant-numeric: tabular-nums;
}
.process-item h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--heading);
    margin-bottom: 8px;
}
.process-item p {
    font-size: 13px;
    color: var(--muted);
    line-height: 1.7;
}

/* ========== 服务承诺 ========== */
.commitment-section { background: #fff; border-bottom: 1px solid var(--border); }
.commitment-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}
.commitment-item {
    background: var(--bg);
    border-radius: var(--radius);
    padding: 24px;
    border: 1px solid transparent;
    transition: var(--transition);
}
.commitment-item:hover {
    border-color: var(--border);
    background: #fff;
    box-shadow: var(--shadow-sm);
}
.commitment-item i {
    font-size: 22px;
    color: var(--primary);
    margin-bottom: 12px;
}
.commitment-item h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--heading);
    margin-bottom: 6px;
}
.commitment-item p {
    font-size: 14px;
    color: var(--muted);
    line-height: 1.7;
}

/* ========== FAQ ========== */
.faq-section { background: var(--bg); }
.accordion {
    max-width: 800px;
    margin: 0 auto;
    background: transparent;
}
.accordion-item {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    margin-bottom: 12px;
    overflow: hidden;
    transition: var(--transition);
}
.accordion-item .accordion-title {
    background: #fff;
    color: var(--heading);
    font-size: 15px;
    font-weight: 600;
    padding: 18px 24px;
    border: none;
    border-bottom: 1px solid transparent;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: var(--transition);
    border-radius: 10px;
}
.accordion-item .accordion-title::before {
    content: '\f128';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    font-size: 12px;
    color: var(--primary);
    background: var(--primary-light);
    width: 26px;
    height: 26px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.accordion-item .accordion-title:hover {
    background: #F8FAFD;
    color: var(--primary);
}
.accordion-item.is-active .accordion-title {
    color: var(--primary);
    border-bottom-color: var(--border);
}
.accordion-item .accordion-content {
    background: #fff;
    color: var(--body);
    font-size: 14px;
    line-height: 1.9;
    padding: 0 24px 20px 60px;
    border: none;
}

/* ========== CTA ========== */
.cta-section {
    position: relative;
    background: linear-gradient(120deg, rgba(20,33,61,0.92), rgba(43,108,212,0.85)), url('/assets/images/backpic/back-3.webp') center/cover no-repeat;
    padding: 64px 0;
    text-align: center;
}
.cta-section h2 {
    font-size: 26px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 12px;
}
.cta-section p {
    font-size: 15px;
    color: rgba(255,255,255,0.85);
    max-width: 560px;
    margin: 0 auto 24px;
    line-height: 1.8;
}
.cta-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--accent);
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    padding: 13px 32px;
    border-radius: 8px;
    transition: var(--transition);
    box-shadow: 0 4px 14px rgba(232,163,61,0.35);
}
.cta-btn:hover {
    background: var(--accent-dark);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(232,163,61,0.4);
}
.cta-btn i { font-size: 13px; }

/* ========== 页脚 ========== */
.site-footer {
    background: #14213D;
    color: rgba(255,255,255,0.75);
    padding: 56px 0 24px;
}
.site-footer .container { max-width: 1200px; }
.footer-brand .footer-logo {
    font-size: 19px;
    font-weight: 700;
    color: #fff;
    display: block;
    margin-bottom: 12px;
}
.footer-brand p {
    font-size: 13px;
    color: rgba(255,255,255,0.6);
    line-height: 1.8;
    max-width: 300px;
}
.site-footer h4 {
    font-size: 14px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 16px;
}
.site-footer ul li {
    font-size: 13px;
    color: rgba(255,255,255,0.6);
    margin-bottom: 10px;
    line-height: 1.6;
}
.site-footer ul li a {
    color: rgba(255,255,255,0.6);
    font-size: 13px;
    transition: var(--transition);
}
.site-footer ul li a:hover { color: var(--accent); }
.site-footer ul li i {
    color: var(--accent);
    margin-right: 8px;
    font-size: 12px;
    width: 14px;
}
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.12);
    margin-top: 36px;
    padding-top: 20px;
    text-align: center;
}
.footer-bottom p {
    font-size: 12px;
    color: rgba(255,255,255,0.45);
}

/* ========== 底部固定转化条 ========== */
.sticky-cta {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 64px;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(6px);
    border-top: 1px solid var(--border);
    box-shadow: 0 -4px 20px rgba(15,23,42,0.06);
    z-index: 150;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px 0 112px;
}
.sticky-cta p {
    font-size: 14px;
    font-weight: 500;
    color: var(--heading);
    margin: 0;
}
.sticky-cta a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--accent);
    color: #fff;
    font-size: 14px;
    font-weight: 600;
    padding: 10px 24px;
    border-radius: 8px;
    transition: var(--transition);
    box-shadow: 0 3px 10px rgba(232,163,61,0.3);
    white-space: nowrap;
}
.sticky-cta a:hover {
    background: var(--accent-dark);
    color: #fff;
    transform: translateY(-1px);
}
.sticky-cta a i { font-size: 12px; }

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
    .app-sidebar { display: none; }
    .mobile-topbar { display: flex; }
    .main-content { margin-left: 0; padding-top: 60px; }
    .sticky-cta { padding: 0 16px; }
    .process-grid { grid-template-columns: repeat(2, 1fr); }
    .commitment-list { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .category-hero { padding: 48px 0 40px; }
    .section-block { padding: 48px 0; }
    .service-showcase .section-block { padding: 48px 0; }
    .stats-band .cell {
        border-right: none;
        border-bottom: 1px solid rgba(43,108,212,0.1);
        padding: 8px 0;
    }
    .stats-band .cell:last-child { border-bottom: none; }
    .stats-band { padding: 32px 0; }
    .stats-band .stat-num { font-size: 26px; }
}
@media (max-width: 640px) {
    .container { padding: 0 16px; }
    .process-grid { grid-template-columns: 1fr; }
    .commitment-list { grid-template-columns: 1fr; }
    .category-hero h1 { font-size: 26px; }
    .category-hero .hero-desc { font-size: 14px; }
    .sticky-cta p { display: none; }
    .sticky-cta { justify-content: center; }
    .sticky-cta a { width: 100%; justify-content: center; }
    .section-header h2 { font-size: 22px; }
    .service-card .card-img { height: 150px; }
    .accordion-item .accordion-content { padding: 0 16px 16px 50px; }
    .cta-section h2 { font-size: 22px; }
    .cta-btn { width: 100%; justify-content: center; }
}

/* ========== Foundation 覆盖 ========== */
.grid-margin-y { margin-top: 0; }
.grid-margin-y > .cell { margin-bottom: 24px; }
.accordion .accordion-title:focus { outline: none; box-shadow: none; }
.accordion .accordion-content { border: none; }

/* roulang page: category3 */
:root {
            --primary: #2B6CD4;
            --primary-dark: #1F56A8;
            --primary-light: rgba(43, 108, 212, 0.10);
            --accent: #E8A33D;
            --accent-dark: #D18A2C;
            --bg-body: #F5F7FA;
            --bg-card: #FFFFFF;
            --bg-side: #FAFBFC;
            --text-heading: #1E2A3A;
            --text-body: #4A5568;
            --text-muted: #8A94A6;
            --border: #E3E8EF;
            --success: #10B981;
            --error: #EF4444;
            --warning: #F59E0B;
            --radius: 12px;
            --radius-sm: 8px;
            --shadow: 0 1px 3px rgba(15, 23, 42, 0.06);
            --shadow-lg: 0 12px 32px rgba(15, 23, 42, 0.10);
            --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html,
        body {
            margin: 0;
            padding: 0;
        }
        body {
            font-family: var(--font);
            background: var(--bg-body);
            color: var(--text-body);
            line-height: 1.8;
            font-size: 16px;
            display: flex;
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color .2s;
        }
        a:hover {
            color: var(--primary-dark);
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
        }
        ul,
        ol {
            padding: 0;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .main-col {
            flex: 1;
            min-width: 0;
            display: flex;
            flex-direction: column;
        }
        .main-content {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px 56px;
        }

        /* ===== 侧栏导航 ===== */
        .side-nav {
            width: 88px;
            flex-shrink: 0;
            position: sticky;
            top: 0;
            height: 100vh;
            background: var(--bg-side);
            border-right: 1px solid var(--border);
            z-index: 500;
            overflow: hidden;
            display: flex;
            flex-direction: column;
            transition: width .25s ease;
        }
        .side-nav:hover {
            width: 240px;
            box-shadow: 4px 0 16px rgba(15, 23, 42, 0.04);
        }
        .logo-area {
            height: 64px;
            display: flex;
            align-items: center;
            padding-left: 27px;
            gap: 8px;
            border-bottom: 1px solid var(--border);
            flex-shrink: 0;
            transition: padding .25s;
        }
        .side-nav:hover .logo-area {
            padding-left: 20px;
        }
        .logo-badge {
            width: 34px;
            height: 34px;
            min-width: 34px;
            background: var(--primary);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 700;
            font-size: 15px;
            letter-spacing: 0;
        }
        .logo-text-group {
            display: flex;
            flex-direction: column;
            line-height: 1.25;
            opacity: 0;
            max-width: 0;
            overflow: hidden;
            white-space: nowrap;
            transition: opacity .25s, max-width .25s;
        }
        .side-nav:hover .logo-text-group {
            opacity: 1;
            max-width: 150px;
            margin-left: 4px;
        }
        .logo-text-main {
            font-weight: 700;
            color: var(--text-heading);
            font-size: 15px;
        }
        .logo-text-sub {
            font-size: 11px;
            color: var(--text-muted);
        }
        .side-nav-items {
            display: flex;
            flex-direction: column;
            padding: 14px 0;
            flex: 1;
        }
        .nav-item {
            display: flex;
            align-items: center;
            padding: 14px 0 14px 33px;
            color: var(--text-body);
            white-space: nowrap;
            border-left: 3px solid transparent;
            transition: background .2s, color .2s, padding-left .25s;
            font-weight: 500;
            font-size: 14px;
        }
        .side-nav:hover .nav-item {
            padding-left: 20px;
        }
        .nav-item i {
            width: 24px;
            text-align: center;
            font-size: 19px;
            flex-shrink: 0;
        }
        .nav-item .nav-text {
            opacity: 0;
            max-width: 0;
            overflow: hidden;
            transition: opacity .2s, max-width .25s, margin-left .25s;
            font-size: 14px;
            font-weight: 500;
        }
        .side-nav:hover .nav-text {
            opacity: 1;
            max-width: 160px;
            margin-left: 12px;
        }
        .nav-item:hover {
            background: rgba(43, 108, 212, 0.06);
            color: var(--primary);
        }
        .nav-item.active {
            background: var(--primary-light);
            color: var(--primary);
            border-left-color: var(--primary);
        }
        .side-nav-bottom {
            padding: 16px 0 16px 33px;
            border-top: 1px solid var(--border);
            display: flex;
            align-items: center;
            white-space: nowrap;
            transition: padding-left .25s;
        }
        .side-nav:hover .side-nav-bottom {
            padding-left: 20px;
        }
        .side-nav-bottom i {
            width: 24px;
            text-align: center;
            font-size: 16px;
            color: var(--text-muted);
            flex-shrink: 0;
        }
        .nav-help-text {
            font-size: 11px;
            color: var(--text-muted);
            opacity: 0;
            max-width: 0;
            overflow: hidden;
            transition: opacity .2s, max-width .25s, margin-left .25s;
            line-height: 1.4;
        }
        .side-nav:hover .nav-help-text {
            opacity: 1;
            max-width: 200px;
            margin-left: 10px;
        }

        /* ===== 移动端顶部栏 ===== */
        .mobile-topbar {
            display: none;
            height: 56px;
            background: var(--bg-card);
            border-bottom: 1px solid var(--border);
            align-items: center;
            justify-content: space-between;
            padding: 0 16px;
            position: sticky;
            top: 0;
            z-index: 400;
        }
        .mobile-logo {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .mobile-logo-badge {
            width: 30px;
            height: 30px;
            background: var(--primary);
            color: #fff;
            border-radius: 9px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 14px;
        }
        .mobile-logo-text {
            font-weight: 700;
            color: var(--text-heading);
            font-size: 15px;
        }
        .menu-toggle {
            background: transparent;
            border: none;
            width: 40px;
            height: 40px;
            font-size: 20px;
            color: var(--text-heading);
            cursor: pointer;
            border-radius: 8px;
            transition: background .2s;
        }
        .menu-toggle:hover {
            background: var(--bg-body);
        }

        /* ===== 移动端抽屉 ===== */
        .drawer-overlay {
            position: fixed;
            inset: 0;
            background: rgba(15, 23, 42, 0.5);
            z-index: 550;
            opacity: 0;
            visibility: hidden;
            transition: opacity .3s, visibility .3s;
        }
        .drawer-overlay.open {
            opacity: 1;
            visibility: visible;
        }
        .drawer {
            position: fixed;
            top: 0;
            bottom: 0;
            left: 0;
            width: 280px;
            background: var(--bg-card);
            z-index: 600;
            transform: translateX(-100%);
            transition: transform .3s ease;
            display: flex;
            flex-direction: column;
        }
        .drawer.open {
            transform: translateX(0);
        }
        .drawer-header {
            height: 64px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 20px;
            border-bottom: 1px solid var(--border);
        }
        .drawer-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 700;
            color: var(--text-heading);
            font-size: 16px;
        }
        .drawer-logo-badge {
            width: 30px;
            height: 30px;
            background: var(--primary);
            color: #fff;
            border-radius: 9px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 14px;
        }
        .drawer-close {
            background: transparent;
            border: none;
            width: 36px;
            height: 36px;
            font-size: 18px;
            color: var(--text-muted);
            cursor: pointer;
            border-radius: 8px;
            transition: background .2s;
        }
        .drawer-close:hover {
            background: var(--bg-body);
        }
        .drawer-nav {
            flex: 1;
            padding: 16px 0;
        }
        .drawer-nav-item {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 14px 24px;
            color: var(--text-body);
            font-weight: 500;
            font-size: 15px;
            border-left: 3px solid transparent;
            transition: background .2s, color .2s;
        }
        .drawer-nav-item i {
            width: 22px;
            text-align: center;
            font-size: 18px;
        }
        .drawer-nav-item:hover {
            background: rgba(43, 108, 212, 0.05);
            color: var(--primary);
        }
        .drawer-nav-item.active {
            background: var(--primary-light);
            color: var(--primary);
            border-left-color: var(--primary);
        }
        .drawer-footer {
            padding: 20px 24px;
            border-top: 1px solid var(--border);
            font-size: 12px;
            color: var(--text-muted);
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 44px;
            padding: 0 24px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: all .2s;
            border: none;
            line-height: 1;
            letter-spacing: .3px;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(43, 108, 212, 0.3);
        }
        .btn-accent {
            background: var(--accent);
            color: #fff;
        }
        .btn-accent:hover {
            background: var(--accent-dark);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(232, 163, 61, 0.35);
        }
        .btn-outline {
            background: #fff;
            border: 1.5px solid var(--primary);
            color: var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary-light);
            color: var(--primary);
            transform: translateY(-1px);
        }
        .btn-outline-light {
            background: transparent;
            border: 1.5px solid rgba(255, 255, 255, 0.8);
            color: #fff;
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
            transform: translateY(-1px);
        }

        /* ===== 页头 ===== */
        .page-header {
            position: relative;
            background: linear-gradient(120deg, rgba(255, 255, 255, 0.96) 0%, rgba(255, 255, 255, 0.88) 42%, rgba(43, 108, 212, 0.06) 78%, rgba(232, 163, 61, 0.08) 100%), url('/assets/images/backpic/back-1.webp') right center / cover no-repeat;
            border-bottom: 1px solid var(--border);
            padding: 48px 0 42px;
        }
        .page-header .container {
            position: relative;
            z-index: 1;
        }
        .breadcrumb {
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .breadcrumb a {
            color: var(--text-muted);
            transition: color .2s;
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .separator {
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1;
        }
        .breadcrumb .current {
            color: var(--text-heading);
            font-weight: 500;
        }
        .page-header h1 {
            font-size: clamp(28px, 4vw, 38px);
            font-weight: 700;
            color: var(--text-heading);
            margin: 0 0 12px;
            line-height: 1.3;
        }
        .page-header .lead {
            font-size: 16px;
            color: var(--text-body);
            max-width: 680px;
            margin: 0 0 18px;
            line-height: 1.8;
        }
        .header-tags {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }
        .tag {
            display: inline-flex;
            align-items: center;
            padding: 4px 12px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 4px;
            font-size: 12px;
            font-weight: 500;
            white-space: nowrap;
        }

        /* ===== 图文交错区块 ===== */
        .alt-section {
            padding: 72px 0 64px;
        }
        .alt-section+.alt-section {
            border-top: 1px solid var(--border);
        }
        .alt-section .alt-media {
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            background: #E3E8EF;
            transition: box-shadow .3s;
        }
        .alt-section .alt-media:hover {
            box-shadow: var(--shadow-lg);
        }
        .alt-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            aspect-ratio: 16 / 10;
        }
        .alt-section .grid-margin-x {
            margin-left: -20px;
            margin-right: -20px;
        }
        .alt-section .grid-margin-x>.cell {
            padding-left: 20px;
            padding-right: 20px;
        }
        .alt-content h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--text-heading);
            margin: 0 0 16px;
            line-height: 1.3;
            letter-spacing: .2px;
        }
        .alt-content p {
            font-size: 15px;
            line-height: 1.9;
            color: var(--text-body);
            margin: 0 0 22px;
        }
        .alt-points {
            list-style: none;
            margin: 0 0 24px;
        }
        .alt-points li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            margin-bottom: 12px;
            font-size: 15px;
            line-height: 1.6;
            color: var(--text-body);
        }
        .alt-points li i {
            color: var(--primary);
            margin-top: 5px;
            font-size: 15px;
            flex-shrink: 0;
        }

        /* ===== 数据条带 ===== */
        .stats-band {
            background: var(--primary-light);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
            padding: 52px 0;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            text-align: center;
        }
        .stats-number {
            font-size: 32px;
            font-weight: 700;
            color: var(--accent);
            font-variant-numeric: tabular-nums;
            line-height: 1.2;
            letter-spacing: .5px;
        }
        .stats-label {
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 6px;
            font-weight: 500;
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 76px 0 72px;
        }
        .section-head {
            text-align: center;
            margin-bottom: 40px;
        }
        .section-head h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-heading);
            margin: 0 0 8px;
            line-height: 1.3;
        }
        .section-head p {
            font-size: 15px;
            color: var(--text-muted);
            max-width: 560px;
            margin: 0 auto;
        }
        .faq-list {
            list-style: none !important;
            margin: 0 auto !important;
            max-width: 840px;
            padding: 0 !important;
        }
        .faq-list .accordion-item {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 10px;
            margin-bottom: 12px;
            overflow: hidden;
            list-style: none;
            transition: border-color .2s, box-shadow .2s;
        }
        .faq-list .accordion-item.is-active {
            border-color: var(--primary);
            box-shadow: var(--shadow);
        }
        .faq-list .accordion-title {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 18px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-heading);
            background: transparent !important;
            border-bottom: 0 !important;
            line-height: 1.5;
            transition: color .2s;
        }
        .faq-list .accordion-title:hover,
        .faq-list .accordion-title:focus {
            color: var(--primary);
            background: rgba(43, 108, 212, 0.03) !important;
        }
        .faq-list .accordion-title::before {
            content: '?';
            width: 28px;
            height: 28px;
            min-width: 28px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 14px;
            line-height: 1;
        }
        .faq-list .accordion-content {
            padding: 4px 24px 22px 64px;
            color: var(--text-body);
            font-size: 15px;
            line-height: 1.9;
            border-bottom: 0 !important;
            background: transparent !important;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 56px 0 110px;
        }
        .cta-box {
            background: var(--primary);
            border-radius: 16px;
            padding: 52px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-box::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 220px;
            height: 220px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
        }
        .cta-box::after {
            content: '';
            position: absolute;
            bottom: -80px;
            left: -40px;
            width: 180px;
            height: 180px;
            border-radius: 50%;
            background: rgba(232, 163, 61, 0.10);
        }
        .cta-box h2 {
            color: #fff;
            font-size: 28px;
            font-weight: 700;
            margin: 0 0 12px;
            position: relative;
            z-index: 1;
            line-height: 1.3;
        }
        .cta-box p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 15px;
            line-height: 1.8;
            margin: 0 0 28px;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
            position: relative;
            z-index: 1;
        }
        .cta-actions {
            display: flex;
            gap: 12px;
            justify-content: center;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #14213D;
            color: rgba(255, 255, 255, 0.75);
            padding: 56px 0 24px;
        }
        .site-footer h4 {
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            margin: 0 0 14px;
        }
        .site-footer ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .site-footer ul li {
            margin-bottom: 10px;
            font-size: 14px;
            line-height: 1.6;
        }
        .site-footer ul li a {
            color: rgba(255, 255, 255, 0.75);
            transition: color .2s;
        }
        .site-footer ul li a:hover {
            color: var(--accent);
        }
        .footer-brand {
            display: flex;
            flex-direction: column;
        }
        .footer-logo {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.65);
            margin: 0;
            max-width: 320px;
        }
        .site-footer ul li i {
            margin-right: 8px;
            color: var(--accent);
            width: 16px;
            text-align: center;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            margin-top: 36px;
            padding-top: 20px;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom p {
            margin: 0;
        }

        /* ===== 底部转化条 ===== */
        .convert-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            height: 64px;
            background: rgba(255, 255, 255, 0.94);
            border-top: 1px solid var(--border);
            box-shadow: 0 -2px 14px rgba(15, 23, 42, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 300;
            backdrop-filter: blur(6px);
        }
        .convert-inner {
            max-width: 1200px;
            width: 100%;
            padding: 0 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }
        .convert-text {
            font-size: 14px;
            color: var(--text-heading);
            font-weight: 500;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .convert-btn {
            background: var(--accent);
            color: #fff;
            border: none;
            border-radius: var(--radius-sm);
            padding: 10px 24px;
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            transition: background .2s, transform .2s;
            white-space: nowrap;
        }
        .convert-btn:hover {
            background: var(--accent-dark);
            transform: translateY(-1px);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            body {
                flex-direction: column;
            }
            .side-nav {
                display: none;
            }
            .mobile-topbar {
                display: flex;
            }
            .main-col {
                width: 100%;
            }
            .main-content {
                padding: 0 20px 56px;
            }
            .page-header {
                padding: 40px 0 34px;
            }
            .alt-section {
                padding: 56px 0 48px;
            }
        }
        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .cta-box {
                padding: 40px 28px;
            }
            .cta-box h2 {
                font-size: 24px;
            }
        }
        @media (max-width: 640px) {
            .container,
            .main-content {
                padding: 0 16px;
            }
            .page-header h1 {
                font-size: 26px;
            }
            .page-header .lead {
                font-size: 15px;
            }
            .alt-section .grid-margin-x {
                margin-left: -10px;
                margin-right: -10px;
            }
            .alt-section .grid-margin-x>.cell {
                padding-left: 10px;
                padding-right: 10px;
            }
            .alt-media img {
                aspect-ratio: 4 / 3;
            }
            .alt-content h2 {
                font-size: 22px;
            }
            .stats-number {
                font-size: 26px;
            }
            .faq-list .accordion-title {
                font-size: 15px;
                padding: 16px 18px;
            }
            .faq-list .accordion-content {
                padding: 4px 18px 18px 50px;
                font-size: 14px;
            }
            .cta-actions .btn {
                width: 100%;
                max-width: 280px;
                margin: 0 auto;
            }
            .convert-inner {
                justify-content: center;
                padding: 0 16px;
            }
            .convert-text {
                display: none;
            }
            .site-footer {
                padding: 44px 0 20px;
            }
            .site-footer .grid-x>.cell {
                margin-bottom: 24px;
            }
            .footer-bottom {
                margin-top: 20px;
            }
        }
        @media (min-width: 641px) and (max-width: 1024px) {
            .alt-section .grid-margin-x {
                margin-left: -16px;
                margin-right: -16px;
            }
            .alt-section .grid-margin-x>.cell {
                padding-left: 16px;
                padding-right: 16px;
            }
        }