/* roulang page: index */
:root {
            --color-primary: #FF6600;
            --color-primary-dark: #E55A00;
            --color-primary-light: #FF8533;
            --color-secondary: #1A237E;
            --color-secondary-dark: #0D1547;
            --color-secondary-light: #283593;
            --color-accent: #FF3D00;
            --color-bg: #F8F9FA;
            --color-bg-alt: #FFFFFF;
            --color-text: #1F2937;
            --color-text-light: #6B7280;
            --color-text-lighter: #9CA3AF;
            --color-border: #E5E7EB;
            --color-success: #10B981;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-card: 18px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
            --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
            --shadow-xl: 0 16px 48px rgba(0,0,0,0.16);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --gradient-primary: linear-gradient(135deg, #FF6600 0%, #E84C3D 100%);
            --gradient-hero: linear-gradient(135deg, #FF6600 0%, #1A237E 100%);
            --gradient-card: linear-gradient(145deg, #FFFFFF 0%, #FFF5F0 100%);
            --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: var(--font-sans);
            background: var(--color-bg);
            color: var(--color-text);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { text-decoration: none; color: inherit; transition: var(--transition); }
        button { cursor: pointer; border: none; background: none; font-family: inherit; }
        input, textarea { font-family: inherit; outline: none; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        .container-narrow { max-width: 960px; margin: 0 auto; padding: 0 20px; }
        .section-padding { padding: 80px 0; }
        .section-padding-sm { padding: 56px 0; }

        /* 导航 */
        .site-header {
            background: rgba(255,255,255,0.97);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
            position: sticky;
            top: 0;
            z-index: 100;
            height: 72px;
            display: flex;
            align-items: center;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .logo { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.35rem; color: var(--color-secondary); }
        .logo-icon { width: 36px; height: 36px; background: var(--gradient-primary); border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center; color: #fff; font-size: 1.2rem; }
        .nav-menu { display: flex; align-items: center; gap: 8px; }
        .nav-menu a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--color-text-light);
            transition: var(--transition);
            position: relative;
        }
        .nav-menu a:hover { color: var(--color-primary); background: rgba(255,102,0,0.06); }
        .nav-menu a.active { color: var(--color-primary); font-weight: 600; background: rgba(255,102,0,0.08); }
        .nav-menu a.active::after { content: ''; position: absolute; bottom: 2px; left: 50%; transform: translateX(-50%); width: 20px; height: 3px; background: var(--color-primary); border-radius: 2px; }
        .nav-cta {
            padding: 10px 28px;
            background: var(--gradient-primary);
            color: #fff !important;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 0.9rem;
            box-shadow: 0 4px 15px rgba(255,102,0,0.3);
            transition: var(--transition);
        }
        .nav-cta:hover { transform: translateY(-2px); box-shadow: 0 6px 25px rgba(255,102,0,0.4); background: linear-gradient(135deg, #FF8533 0%, #FF3D00 100%); }
        .hamburger { display: none; flex-direction: column; gap: 5px; padding: 8px; cursor: pointer; }
        .hamburger span { width: 26px; height: 2.5px; background: var(--color-secondary); border-radius: 2px; transition: var(--transition); }

        /* 移动端底部Tab导航 */
        .mobile-tab-nav {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            height: 68px;
            background: rgba(255,255,255,0.98);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-top: 1px solid var(--color-border);
            z-index: 200;
            padding: 0 12px;
            padding-bottom: env(safe-area-inset-bottom, 0);
            box-shadow: 0 -4px 20px rgba(0,0,0,0.06);
        }
        .tab-nav-inner { display: flex; align-items: center; justify-content: space-around; height: 100%; }
        .tab-item { display: flex; flex-direction: column; align-items: center; gap: 3px; padding: 4px 12px; border-radius: var(--radius-sm); transition: var(--transition); color: var(--color-text-lighter); min-width: 60px; }
        .tab-item i { font-size: 1.3rem; transition: var(--transition); }
        .tab-item span { font-size: 0.7rem; font-weight: 500; transition: var(--transition); }
        .tab-item.active { color: var(--color-primary); }
        .tab-item.active i { transform: scale(1.05); }
        .tab-item:hover { color: var(--color-primary); }

        /* Hero */
        .hero {
            min-height: 85vh;
            display: flex;
            align-items: center;
            position: relative;
            background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26,35,126,0.85) 0%, rgba(0,0,0,0.6) 50%, rgba(255,102,0,0.3) 100%);
            z-index: 1;
        }
        .hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
            z-index: 1;
        }
        .hero-content { position: relative; z-index: 2; width: 100%; padding: 60px 0; }
        .hero h1 { font-size: 3.2rem; font-weight: 800; color: #fff; line-height: 1.2; letter-spacing: -0.5px; max-width: 800px; margin-bottom: 20px; text-shadow: 0 4px 30px rgba(0,0,0,0.3); }
        .hero h1 .highlight { background: linear-gradient(135deg, #FFD54F, #FF8A65); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .hero-sub { font-size: 1.2rem; color: rgba(255,255,255,0.85); max-width: 600px; line-height: 1.7; margin-bottom: 36px; font-weight: 400; }
        .hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
        .hero-btn-primary {
            padding: 16px 40px;
            background: var(--gradient-primary);
            color: #fff;
            border-radius: var(--radius-md);
            font-weight: 700;
            font-size: 1.05rem;
            box-shadow: 0 8px 32px rgba(255,102,0,0.35);
            transition: var(--transition);
            display: inline-flex; align-items: center; gap: 10px;
        }
        .hero-btn-primary:hover { transform: translateY(-3px); box-shadow: 0 12px 40px rgba(255,102,0,0.45); }
        .hero-btn-secondary {
            padding: 16px 36px;
            background: rgba(255,255,255,0.12);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            color: #fff;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 1.05rem;
            border: 1.5px solid rgba(255,255,255,0.25);
            transition: var(--transition);
            display: inline-flex; align-items: center; gap: 10px;
        }
        .hero-btn-secondary:hover { background: rgba(255,255,255,0.22); border-color: rgba(255,255,255,0.4); transform: translateY(-3px); }
        .hero-trust { margin-top: 40px; display: flex; align-items: center; gap: 30px; flex-wrap: wrap; }
        .hero-trust span { color: rgba(255,255,255,0.6); font-size: 0.85rem; display: flex; align-items: center; gap: 6px; }
        .hero-trust span i { color: #FFD54F; }
        .hero-stats { display: flex; gap: 32px; }
        .hero-stat { text-align: center; }
        .hero-stat-num { font-size: 1.6rem; font-weight: 800; color: #fff; }
        .hero-stat-label { font-size: 0.8rem; color: rgba(255,255,255,0.6); }

        /* 板块标题 */
        .section-title { text-align: center; margin-bottom: 56px; }
        .section-title h2 { font-size: 2rem; font-weight: 700; color: var(--color-secondary); margin-bottom: 12px; letter-spacing: -0.3px; }
        .section-title p { color: var(--color-text-light); max-width: 600px; margin: 0 auto; font-size: 1.05rem; }
        .section-title .accent-line { width: 60px; height: 4px; background: var(--gradient-primary); border-radius: 2px; margin: 16px auto 0; }

        /* 卡片 */
        .card {
            background: var(--color-bg-alt);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-md);
            transition: var(--transition);
            overflow: hidden;
            border: 1px solid rgba(0,0,0,0.04);
        }
        .card:hover { transform: translateY(-6px); box-shadow: var(--shadow-xl); }
        .card-img { width: 100%; aspect-ratio: 16/9; object-fit: cover; display: block; }
        .card-body { padding: 24px; }
        .card-tag { display: inline-block; padding: 4px 14px; background: rgba(255,102,0,0.1); color: var(--color-primary); border-radius: 20px; font-size: 0.75rem; font-weight: 600; margin-bottom: 12px; }
        .card-title { font-size: 1.15rem; font-weight: 600; margin-bottom: 10px; line-height: 1.4; color: var(--color-text); }
        .card-title a:hover { color: var(--color-primary); }
        .card-desc { color: var(--color-text-light); font-size: 0.92rem; line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .card-meta { display: flex; align-items: center; gap: 16px; margin-top: 14px; font-size: 0.8rem; color: var(--color-text-lighter); }
        .card-meta i { margin-right: 4px; }

        /* 卖点卡片 (特色) */
        .feature-card {
            background: var(--color-bg-alt);
            border-radius: var(--radius-xl);
            padding: 40px 32px;
            text-align: center;
            box-shadow: var(--shadow-md);
            transition: var(--transition);
            border: 1px solid rgba(0,0,0,0.04);
            position: relative;
            overflow: hidden;
        }
        .feature-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-xl); }
        .feature-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px; background: var(--gradient-primary); opacity: 0; transition: var(--transition); }
        .feature-card:hover::before { opacity: 1; }
        .feature-icon {
            width: 70px;
            height: 70px;
            margin: 0 auto 20px;
            background: var(--gradient-primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            color: #fff;
            box-shadow: 0 8px 24px rgba(255,102,0,0.25);
            transition: var(--transition);
        }
        .feature-card:hover .feature-icon { transform: scale(1.05); box-shadow: 0 12px 32px rgba(255,102,0,0.35); }
        .feature-card h3 { font-size: 1.3rem; font-weight: 600; margin-bottom: 12px; color: var(--color-secondary); }
        .feature-card p { color: var(--color-text-light); font-size: 0.95rem; line-height: 1.7; }
        .feature-badge { display: inline-block; margin-top: 16px; padding: 6px 18px; background: rgba(255,102,0,0.08); color: var(--color-primary); border-radius: 20px; font-size: 0.8rem; font-weight: 600; }

        /* 场景演示 */
        .scene-section { background: var(--color-bg-alt); }
        .scene-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
        .scene-image { border-radius: var(--radius-xl); overflow: hidden; box-shadow: var(--shadow-lg); }
        .scene-image img { width: 100%; height: 400px; object-fit: cover; transition: var(--transition); }
        .scene-image:hover img { transform: scale(1.03); }
        .scene-text h3 { font-size: 1.8rem; font-weight: 700; color: var(--color-secondary); margin-bottom: 16px; }
        .scene-text p { color: var(--color-text-light); line-height: 1.8; font-size: 1rem; margin-bottom: 20px; }
        .scene-text .scene-list { list-style: none; padding: 0; margin: 0 0 24px; }
        .scene-text .scene-list li { padding: 8px 0; display: flex; align-items: center; gap: 12px; color: var(--color-text); font-size: 0.95rem; }
        .scene-text .scene-list li i { color: var(--color-primary); font-size: 1.1rem; width: 20px; text-align: center; }
        .scene-cta {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            background: var(--gradient-primary);
            color: #fff;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 0.95rem;
            box-shadow: 0 4px 16px rgba(255,102,0,0.25);
            transition: var(--transition);
        }
        .scene-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(255,102,0,0.35); }

        /* 社会认同 */
        .social-proof { background: var(--color-secondary); color: #fff; }
        .proof-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; }
        .proof-item { text-align: center; padding: 20px; }
        .proof-item .num { font-size: 2.8rem; font-weight: 800; background: linear-gradient(135deg, #FFD54F, #FF8A65); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; line-height: 1.2; }
        .proof-item .label { font-size: 0.95rem; color: rgba(255,255,255,0.75); margin-top: 8px; }
        .testimonial-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 30px; margin-top: 50px; }
        .testimonial-card {
            background: rgba(255,255,255,0.08);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border-radius: var(--radius-lg);
            padding: 28px 32px;
            border: 1px solid rgba(255,255,255,0.1);
            transition: var(--transition);
        }
        .testimonial-card:hover { background: rgba(255,255,255,0.14); transform: translateY(-3px); }
        .testimonial-card .stars { color: #FFD54F; font-size: 0.9rem; margin-bottom: 12px; }
        .testimonial-card .quote { color: rgba(255,255,255,0.85); font-size: 0.95rem; line-height: 1.7; font-style: italic; }
        .testimonial-card .author { display: flex; align-items: center; gap: 12px; margin-top: 18px; }
        .testimonial-card .author-avatar { width: 44px; height: 44px; border-radius: 50%; background: var(--gradient-primary); display: flex; align-items: center; justify-content: center; color: #fff; font-weight: 700; font-size: 1.1rem; }
        .testimonial-card .author-info .name { font-weight: 600; font-size: 0.9rem; color: #fff; }
        .testimonial-card .author-info .title { font-size: 0.8rem; color: rgba(255,255,255,0.5); }

        /* 资讯列表 */
        .news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
        .news-empty { text-align: center; padding: 60px 20px; color: var(--color-text-lighter); font-size: 1rem; background: var(--color-bg-alt); border-radius: var(--radius-lg); border: 1px dashed var(--color-border); }

        /* FAQ */
        .faq-list { max-width: 800px; margin: 0 auto; }
        .faq-item {
            background: var(--color-bg-alt);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { box-shadow: var(--shadow-md); }
        .faq-question {
            padding: 20px 28px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            color: var(--color-text);
            background: none;
            width: 100%;
            text-align: left;
            gap: 16px;
        }
        .faq-question i { color: var(--color-primary); font-size: 1.1rem; transition: var(--transition); }
        .faq-item.open .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            padding: 0 28px 20px;
            color: var(--color-text-light);
            font-size: 0.95rem;
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-answer { display: block; }

        /* CTA */
        .cta-section {
            background: var(--gradient-hero);
            padding: 80px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url("data:image/svg+xml,%3Csvg width='80' height='80' viewBox='0 0 80 80' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.04'%3E%3Cpath d='M50 50v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-40V0h-2v4h-4v2h4v4h2V6h4V4h-4zM10 50v-4H8v4H4v2h4v4h2v-4h4v-2H10zM10 10V0H8v4H4v2h4v4h2V6h4V4H10z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
            z-index: 0;
        }
        .cta-section .container { position: relative; z-index: 1; }
        .cta-section h2 { font-size: 2.2rem; font-weight: 700; color: #fff; margin-bottom: 16px; }
        .cta-section p { color: rgba(255,255,255,0.8); max-width: 560px; margin: 0 auto 32px; font-size: 1.1rem; }
        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            padding: 18px 48px;
            background: #fff;
            color: var(--color-primary);
            border-radius: var(--radius-md);
            font-weight: 700;
            font-size: 1.1rem;
            box-shadow: 0 8px 32px rgba(0,0,0,0.2);
            transition: var(--transition);
        }
        .cta-btn:hover { transform: translateY(-3px); box-shadow: 0 12px 40px rgba(0,0,0,0.3); background: #FFF8F5; }
        .cta-btn i { font-size: 1.2rem; }

        /* 底部转化条 (桌面粘性) */
        .bottom-bar {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            background: rgba(26,35,126,0.98);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            padding: 14px 0;
            z-index: 50;
            border-top: 1px solid rgba(255,255,255,0.08);
            box-shadow: 0 -8px 30px rgba(0,0,0,0.15);
        }
        .bottom-bar-inner { display: flex; align-items: center; justify-content: space-between; }
        .bottom-bar-text { color: #fff; font-size: 0.95rem; font-weight: 500; }
        .bottom-bar-text strong { color: #FFD54F; }
        .bottom-bar-btn {
            padding: 10px 32px;
            background: var(--gradient-primary);
            color: #fff;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.9rem;
            box-shadow: 0 4px 16px rgba(255,102,0,0.3);
            transition: var(--transition);
            display: inline-flex; align-items: center; gap: 8px;
        }
        .bottom-bar-btn:hover { transform: translateY(-2px); box-shadow: 0 6px 24px rgba(255,102,0,0.4); }

        /* 页脚 */
        .site-footer {
            background: var(--color-secondary-dark);
            color: rgba(255,255,255,0.7);
            padding: 60px 0 24px;
        }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; }
        .footer-brand .logo { color: #fff; margin-bottom: 16px; }
        .footer-brand p { font-size: 0.9rem; line-height: 1.7; max-width: 320px; }
        .footer-col h4 { color: #fff; font-weight: 600; font-size: 1rem; margin-bottom: 16px; }
        .footer-col ul { list-style: none; padding: 0; }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul li a { font-size: 0.9rem; color: rgba(255,255,255,0.6); transition: var(--transition); }
        .footer-col ul li a:hover { color: var(--color-primary); padding-left: 4px; }
        .footer-social { display: flex; gap: 12px; margin-top: 16px; }
        .footer-social a { width: 40px; height: 40px; border-radius: 50%; background: rgba(255,255,255,0.08); display: flex; align-items: center; justify-content: center; color: rgba(255,255,255,0.6); font-size: 1.1rem; transition: var(--transition); }
        .footer-social a:hover { background: var(--color-primary); color: #fff; transform: translateY(-3px); }
        .footer-bottom { border-top: 1px solid rgba(255,255,255,0.06); margin-top: 40px; padding-top: 20px; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; font-size: 0.85rem; color: rgba(255,255,255,0.4); }

        /* JSON-LD 隐藏 */
        .json-ld { display: none; }

        /* 响应式 */
        @media (max-width: 1023px) {
            .nav-menu { display: none; }
            .hamburger { display: flex; }
            .mobile-tab-nav { display: block; }
            .bottom-bar { display: none !important; }
            body { padding-bottom: 68px; }
            .site-header { height: 64px; }
            .hero { min-height: 70vh; }
            .hero h1 { font-size: 2.2rem; }
            .hero-sub { font-size: 1rem; }
            .section-padding { padding: 56px 0; }
            .section-title { margin-bottom: 40px; }
            .section-title h2 { font-size: 1.6rem; }
            .scene-grid { grid-template-columns: 1fr; gap: 36px; }
            .scene-image img { height: 280px; }
            .scene-text h3 { font-size: 1.4rem; }
            .proof-grid { grid-template-columns: 1fr; gap: 24px; }
            .testimonial-grid { grid-template-columns: 1fr; gap: 20px; }
            .news-grid { grid-template-columns: 1fr; gap: 20px; }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
            .hero-stats { gap: 20px; }
            .hero-stat-num { font-size: 1.3rem; }
        }
        @media (max-width: 639px) {
            .hero h1 { font-size: 1.7rem; }
            .hero-sub { font-size: 0.9rem; }
            .hero-actions { flex-direction: column; gap: 12px; }
            .hero-btn-primary, .hero-btn-secondary { width: 100%; justify-content: center; padding: 14px 28px; font-size: 0.95rem; }
            .hero-trust { flex-direction: column; align-items: flex-start; gap: 12px; }
            .hero-stats { gap: 16px; flex-wrap: wrap; }
            .section-title h2 { font-size: 1.4rem; }
            .feature-card { padding: 28px 20px; }
            .feature-icon { width: 56px; height: 56px; font-size: 1.4rem; }
            .scene-text h3 { font-size: 1.2rem; }
            .cta-section h2 { font-size: 1.5rem; }
            .cta-btn { padding: 14px 32px; font-size: 0.95rem; width: 100%; justify-content: center; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .faq-question { padding: 16px 20px; font-size: 0.92rem; }
            .faq-answer { padding: 0 20px 16px; font-size: 0.88rem; }
            .proof-item .num { font-size: 2.2rem; }
            .testimonial-card { padding: 20px 22px; }
        }
        @media (min-width: 1024px) {
            .bottom-bar { display: block; }
            body { padding-bottom: 0; }
            .mobile-tab-nav { display: none !important; }
        }
        @media (min-width: 1024px) and (max-width: 1200px) {
            .container { padding: 0 32px; }
        }

/* roulang page: category1 */
:root {
            --color-primary: #FF6600;
            --color-primary-dark: #E85D00;
            --color-secondary: #1A237E;
            --color-secondary-light: #283593;
            --color-accent: #E84C3D;
            --color-dark: #0D1137;
            --color-light: #F8F9FA;
            --color-text: #1a1a2e;
            --color-text-light: #6b7280;
            --color-border: #e5e7eb;
            --radius-card: 16px;
            --radius-button: 10px;
            --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.08);
            --shadow-card-hover: 0 12px 40px rgba(0, 0, 0, 0.14);
            --shadow-nav: 0 2px 20px rgba(0, 0, 0, 0.06);
            --transition-base: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Inter', system-ui, sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background: #ffffff;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 2px;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }

        @media (max-width: 639px) {
            .container {
                padding-left: 1rem;
                padding-right: 1rem;
            }
        }

        /* ========== HEADER / NAV ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.97);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(229, 231, 235, 0.5);
            box-shadow: var(--shadow-nav);
            height: 70px;
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--color-dark);
            letter-spacing: -0.3px;
        }

        .logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.1rem;
            box-shadow: 0 4px 12px rgba(255, 102, 0, 0.3);
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 2rem;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-menu a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--color-text);
            padding: 0.4rem 0;
            position: relative;
            transition: var(--transition-base);
        }

        .nav-menu a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2.5px;
            background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
            border-radius: 2px;
            transition: var(--transition-base);
        }

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

        .nav-menu a:hover::after,
        .nav-menu a.active::after {
            width: 100%;
        }

        .nav-menu a.active {
            color: var(--color-primary);
        }

        .nav-cta {
            background: linear-gradient(135deg, var(--color-primary), var(--color-accent)) !important;
            color: #fff !important;
            padding: 0.6rem 1.6rem !important;
            border-radius: var(--radius-button);
            font-weight: 600 !important;
            font-size: 0.9rem !important;
            box-shadow: 0 4px 16px rgba(255, 102, 0, 0.3);
            transition: var(--transition-base);
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }

        .nav-cta::after {
            display: none !important;
        }

        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(255, 102, 0, 0.4);
            color: #fff !important;
        }

        .nav-cta i {
            font-size: 1rem;
        }

        /* Mobile hamburger */
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 4px;
            border: none;
            background: none;
        }

        .hamburger span {
            width: 26px;
            height: 2.5px;
            background: var(--color-dark);
            border-radius: 4px;
            transition: var(--transition-base);
        }

        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* Mobile nav drawer */
        .mobile-drawer {
            display: none;
            position: fixed;
            top: 70px;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            padding: 2rem 1.5rem;
            z-index: 999;
            flex-direction: column;
            gap: 1.2rem;
            overflow-y: auto;
            opacity: 0;
            transform: translateY(-10px);
            transition: opacity 0.3s ease, transform 0.3s ease;
        }

        .mobile-drawer.open {
            display: flex;
            opacity: 1;
            transform: translateY(0);
        }

        .mobile-drawer a {
            font-size: 1.2rem;
            font-weight: 600;
            padding: 0.8rem 0;
            border-bottom: 1px solid var(--color-border);
            color: var(--color-text);
        }

        .mobile-drawer a.active {
            color: var(--color-primary);
        }

        .mobile-drawer .nav-cta {
            display: inline-flex;
            margin-top: 0.8rem;
            font-size: 1.1rem !important;
            padding: 0.9rem 2rem !important;
            justify-content: center;
        }

        /* Bottom Tab (mobile) */
        .bottom-tab {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            height: 64px;
            background: #fff;
            border-top: 1px solid var(--color-border);
            box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.06);
            z-index: 1001;
            justify-content: space-around;
            align-items: center;
            padding: 0 0.5rem;
            padding-bottom: env(safe-area-inset-bottom, 0);
        }

        .bottom-tab a {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 2px;
            font-size: 0.65rem;
            color: #9ca3af;
            transition: var(--transition-base);
            padding: 4px 8px;
            border-radius: 8px;
            min-width: 60px;
        }

        .bottom-tab a i {
            font-size: 1.3rem;
            transition: var(--transition-base);
        }

        .bottom-tab a.active {
            color: var(--color-primary);
        }

        .bottom-tab a.active i {
            transform: scale(1.05);
        }

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

        /* ========== HERO ========== */
        .hero-section {
            position: relative;
            min-height: 92vh;
            display: flex;
            align-items: center;
            padding-top: 70px;
            overflow: hidden;
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(13, 17, 55, 0.88) 0%, rgba(13, 17, 55, 0.72) 50%, rgba(255, 102, 0, 0.35) 100%);
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 820px;
            padding: 4rem 0 5rem;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.18);
            padding: 0.4rem 1.2rem;
            border-radius: 50px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.9);
            margin-bottom: 1.8rem;
        }

        .hero-badge i {
            color: var(--color-primary);
        }

        .hero-title {
            font-size: 3.2rem;
            font-weight: 800;
            line-height: 1.15;
            color: #ffffff;
            margin-bottom: 1.2rem;
            letter-spacing: -0.5px;
        }

        .hero-title .highlight {
            background: linear-gradient(135deg, var(--color-primary), #ff9a44);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-sub {
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.8);
            max-width: 600px;
            line-height: 1.8;
            margin-bottom: 2.2rem;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            align-items: center;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
            color: #fff;
            font-weight: 700;
            font-size: 1.05rem;
            padding: 0.9rem 2.4rem;
            border-radius: var(--radius-button);
            box-shadow: 0 6px 24px rgba(255, 102, 0, 0.35);
            transition: var(--transition-base);
            border: none;
            cursor: pointer;
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 36px rgba(255, 102, 0, 0.45);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            background: transparent;
            color: #fff;
            font-weight: 600;
            font-size: 1rem;
            padding: 0.85rem 2rem;
            border-radius: var(--radius-button);
            border: 2px solid rgba(255, 255, 255, 0.3);
            transition: var(--transition-base);
            cursor: pointer;
        }

        .btn-secondary:hover {
            border-color: var(--color-primary);
            background: rgba(255, 102, 0, 0.1);
        }

        .hero-trust {
            display: flex;
            gap: 2rem;
            margin-top: 2.5rem;
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.9rem;
        }

        .hero-trust span {
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }

        .hero-trust i {
            color: var(--color-primary);
        }

        /* ========== SECTION COMMON ========== */
        .section-padding {
            padding: 5rem 0;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 800;
            color: var(--color-dark);
            margin-bottom: 0.8rem;
            letter-spacing: -0.3px;
        }

        .section-subtitle {
            font-size: 1.05rem;
            color: var(--color-text-light);
            max-width: 640px;
            margin-bottom: 2.5rem;
            line-height: 1.7;
        }

        .section-divider {
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
            border-radius: 4px;
            margin-bottom: 1.8rem;
        }

        /* ========== FEATURES ========== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
        }

        .feature-card {
            background: #ffffff;
            border-radius: var(--radius-card);
            padding: 2.2rem 1.8rem;
            box-shadow: var(--shadow-card);
            border: 1px solid rgba(229, 231, 235, 0.4);
            transition: var(--transition-base);
            text-align: center;
        }

        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-card-hover);
            border-color: transparent;
        }

        .feature-icon {
            width: 64px;
            height: 64px;
            background: linear-gradient(135deg, rgba(255, 102, 0, 0.12), rgba(232, 76, 61, 0.08));
            border-radius: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1.2rem;
            font-size: 1.6rem;
            color: var(--color-primary);
            transition: var(--transition-base);
        }

        .feature-card:hover .feature-icon {
            background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
            color: #fff;
            transform: scale(1.05);
        }

        .feature-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 0.6rem;
            color: var(--color-dark);
        }

        .feature-card p {
            font-size: 0.95rem;
            color: var(--color-text-light);
            line-height: 1.7;
            margin-bottom: 1rem;
        }

        .feature-badge {
            display: inline-block;
            background: linear-gradient(135deg, rgba(255, 102, 0, 0.12), rgba(232, 76, 61, 0.08));
            color: var(--color-primary);
            font-size: 0.8rem;
            font-weight: 600;
            padding: 0.25rem 0.9rem;
            border-radius: 50px;
            border: 1px solid rgba(255, 102, 0, 0.15);
        }

        /* ========== COVERAGE ========== */
        .coverage-bg {
            background: var(--color-light);
        }

        .coverage-grid {
            display: grid;
            grid-template-columns: repeat(6, 1fr);
            gap: 1.2rem;
        }

        .coverage-item {
            background: #ffffff;
            border-radius: 14px;
            padding: 1.5rem 1rem;
            text-align: center;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
            border: 1px solid rgba(229, 231, 235, 0.3);
            transition: var(--transition-base);
        }

        .coverage-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card);
            border-color: rgba(255, 102, 0, 0.15);
        }

        .coverage-item i {
            font-size: 2rem;
            color: var(--color-primary);
            margin-bottom: 0.5rem;
        }

        .coverage-item span {
            display: block;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--color-text);
        }

        .coverage-count {
            display: inline-block;
            background: var(--color-secondary);
            color: #fff;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 0.15rem 0.7rem;
            border-radius: 50px;
            margin-top: 0.3rem;
        }

        /* ========== PROCESS ========== */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.8rem;
            counter-reset: step;
        }

        .process-step {
            text-align: center;
            position: relative;
        }

        .process-step::after {
            content: '';
            position: absolute;
            top: 2.2rem;
            left: 60%;
            width: 80%;
            height: 2px;
            background: linear-gradient(90deg, var(--color-primary), rgba(255, 102, 0, 0.2));
            border-radius: 2px;
        }

        .process-step:last-child::after {
            display: none;
        }

        .step-number {
            width: 52px;
            height: 52px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1rem;
            font-size: 1.3rem;
            font-weight: 800;
            color: #fff;
            box-shadow: 0 4px 16px rgba(255, 102, 0, 0.25);
        }

        .process-step h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--color-dark);
            margin-bottom: 0.4rem;
        }

        .process-step p {
            font-size: 0.9rem;
            color: var(--color-text-light);
            line-height: 1.6;
        }

        /* ========== STATS ========== */
        .stats-section {
            background: linear-gradient(135deg, var(--color-dark), var(--color-secondary));
            padding: 4rem 0;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2rem;
            text-align: center;
        }

        .stat-item {
            padding: 1rem;
        }

        .stat-number {
            font-size: 2.8rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.1;
            margin-bottom: 0.3rem;
        }

        .stat-number .plus {
            font-size: 1.8rem;
            color: var(--color-primary);
        }

        .stat-label {
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.7);
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: #ffffff;
            border-radius: 14px;
            margin-bottom: 0.8rem;
            border: 1px solid var(--color-border);
            overflow: hidden;
            transition: var(--transition-base);
        }

        .faq-item:hover {
            border-color: rgba(255, 102, 0, 0.2);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 1.2rem 1.8rem;
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-text);
            cursor: pointer;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            transition: var(--transition-base);
            gap: 1rem;
        }

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

        .faq-question i {
            font-size: 0.9rem;
            color: var(--color-primary);
            transition: var(--transition-base);
            flex-shrink: 0;
        }

        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }

        .faq-answer {
            padding: 0 1.8rem 1.2rem;
            font-size: 0.95rem;
            color: var(--color-text-light);
            line-height: 1.8;
            display: none;
        }

        .faq-item.active .faq-answer {
            display: block;
        }

        /* ========== CTA ========== */
        .cta-section {
            background: linear-gradient(135deg, var(--color-dark) 0%, var(--color-secondary) 100%);
            padding: 4.5rem 0;
            text-align: center;
        }

        .cta-title {
            font-size: 2.2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 0.8rem;
        }

        .cta-sub {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.75);
            max-width: 560px;
            margin: 0 auto 2rem;
        }

        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            justify-content: center;
        }

        .btn-cta {
            background: #fff;
            color: var(--color-secondary);
            font-weight: 700;
            font-size: 1.05rem;
            padding: 1rem 2.8rem;
            border-radius: var(--radius-button);
            transition: var(--transition-base);
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.15);
        }

        .btn-cta:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 36px rgba(0, 0, 0, 0.25);
            background: var(--color-primary);
            color: #fff;
        }

        .btn-cta-outline {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.3);
            font-weight: 600;
            font-size: 1.05rem;
            padding: 0.95rem 2.4rem;
            border-radius: var(--radius-button);
            transition: var(--transition-base);
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
        }

        .btn-cta-outline:hover {
            border-color: var(--color-primary);
            background: rgba(255, 102, 0, 0.1);
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: #0a0e2a;
            color: rgba(255, 255, 255, 0.8);
            padding: 4rem 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 2.5rem;
            padding-bottom: 2.5rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand .logo {
            color: #fff;
            margin-bottom: 1rem;
        }

        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 1.2rem;
            max-width: 360px;
        }

        .footer-social {
            display: flex;
            gap: 0.8rem;
        }

        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.7);
            font-size: 1rem;
            transition: var(--transition-base);
        }

        .footer-social a:hover {
            background: var(--color-primary);
            color: #fff;
            transform: translateY(-2px);
        }

        .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 1.2rem;
        }

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

        .footer-col ul li {
            margin-bottom: 0.6rem;
        }

        .footer-col ul li a {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
            transition: var(--transition-base);
        }

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

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1.5rem 0;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
            flex-wrap: wrap;
            gap: 0.8rem;
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1023px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .coverage-grid {
                grid-template-columns: repeat(4, 1fr);
            }
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 2.5rem;
            }
            .process-step::after {
                display: none;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .hero-title {
                font-size: 2.5rem;
            }
        }

        @media (max-width: 767px) {
            .nav-menu {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .bottom-tab {
                display: flex;
            }
            .site-header {
                height: 60px;
            }
            .header-inner {
                height: 60px;
            }
            .hero-section {
                min-height: 80vh;
                padding-top: 60px;
            }
            .hero-title {
                font-size: 1.9rem;
            }
            .hero-sub {
                font-size: 1rem;
            }
            .hero-trust {
                flex-direction: column;
                gap: 0.8rem;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .coverage-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .process-grid {
                grid-template-columns: 1fr;
                max-width: 360px;
                margin: 0 auto;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 1.2rem;
            }
            .stat-number {
                font-size: 2rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .section-padding {
                padding: 3rem 0;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .cta-title {
                font-size: 1.6rem;
            }
            .btn-primary,
            .btn-secondary {
                font-size: 0.95rem;
                padding: 0.75rem 1.6rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-actions .btn-primary,
            .hero-actions .btn-secondary {
                justify-content: center;
            }
            .faq-question {
                padding: 1rem 1.2rem;
                font-size: 0.95rem;
            }
            .faq-answer {
                padding: 0 1.2rem 1rem;
            }
            .coverage-item {
                padding: 1rem 0.6rem;
            }
            .coverage-item i {
                font-size: 1.5rem;
            }
            .coverage-item span {
                font-size: 0.8rem;
            }
        }

        @media (max-width: 520px) {
            .hero-title {
                font-size: 1.6rem;
            }
            .coverage-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .features-grid {
                gap: 1.2rem;
            }
            .feature-card {
                padding: 1.5rem 1.2rem;
            }
            .container {
                padding-left: 0.8rem;
                padding-right: 0.8rem;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 0.8rem;
            }
            .stat-number {
                font-size: 1.8rem;
            }
            .cta-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .btn-cta,
            .btn-cta-outline {
                justify-content: center;
            }
        }

        @media (min-width: 768px) {
            .mobile-drawer {
                display: none !important;
            }
            .bottom-tab {
                display: none !important;
            }
        }

        /* ========== ANIMATIONS ========== */
        .fade-in {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }

        .fade-in.visible {
            opacity: 1;
            transform: translateY(0);
        }

        @keyframes pulse-glow {
            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(255, 102, 0, 0.4);
            }
            50% {
                box-shadow: 0 0 0 16px rgba(255, 102, 0, 0);
            }
        }

        .glow-pulse {
            animation: pulse-glow 2s infinite;
        }

/* roulang page: article */
:root {
            --color-primary: #FF6600;
            --color-primary-dark: #E55A00;
            --color-secondary: #1A237E;
            --color-secondary-light: #283593;
            --color-bg-light: #F8F9FA;
            --color-text-dark: #1A1A2E;
            --color-text-body: #333333;
            --color-text-muted: #666666;
            --color-card-bg: #FFFFFF;
            --radius-card: 16px;
            --radius-button: 10px;
            --radius-badge: 20px;
            --shadow-card: 0 4px 20px rgba(0,0,0,0.06);
            --shadow-card-hover: 0 12px 40px rgba(0,0,0,0.12);
            --shadow-nav: 0 2px 16px rgba(0,0,0,0.06);
            --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

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

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s, background-color 0.2s, box-shadow 0.2s, transform 0.2s;
        }

        button, input, textarea {
            font-family: inherit;
            font-size: inherit;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* ===== 顶部导航 ===== */
        .site-header {
            background: #fff;
            box-shadow: var(--shadow-nav);
            position: sticky;
            top: 0;
            z-index: 100;
            height: 72px;
            display: flex;
            align-items: center;
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--color-primary);
            letter-spacing: -0.5px;
        }

        .logo .logo-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.3rem;
        }

        .logo span:last-child {
            color: var(--color-text-dark);
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .nav-menu a {
            padding: 8px 18px;
            border-radius: var(--radius-button);
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--color-text-body);
            transition: all 0.2s;
            position: relative;
        }

        .nav-menu a:hover {
            background: rgba(255, 102, 0, 0.08);
            color: var(--color-primary);
        }

        .nav-menu a.active {
            background: rgba(255, 102, 0, 0.12);
            color: var(--color-primary);
            font-weight: 600;
        }

        .nav-menu a.nav-cta {
            background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
            color: #fff;
            padding: 10px 24px;
            border-radius: var(--radius-button);
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 8px;
            box-shadow: 0 4px 14px rgba(255, 102, 0, 0.35);
        }

        .nav-menu a.nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(255, 102, 0, 0.45);
            background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
        }

        .hamburger {
            display: none;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--color-text-dark);
            cursor: pointer;
            border-radius: 8px;
            transition: background 0.2s;
        }

        .hamburger:hover {
            background: rgba(0,0,0,0.04);
        }

        /* ===== 移动端底部 Tab ===== */
        .bottom-tab {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            height: 64px;
            background: #fff;
            box-shadow: 0 -2px 16px rgba(0,0,0,0.06);
            z-index: 200;
            padding: 0 12px;
            align-items: center;
            justify-content: space-around;
            border-top: 1px solid rgba(0,0,0,0.04);
        }

        .bottom-tab a {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 3px;
            font-size: 0.7rem;
            color: var(--color-text-muted);
            padding: 6px 10px;
            border-radius: 12px;
            transition: all 0.2s;
            min-width: 56px;
        }

        .bottom-tab a i {
            font-size: 1.35rem;
            transition: color 0.2s;
        }

        .bottom-tab a.active {
            color: var(--color-primary);
        }

        .bottom-tab a.active i {
            color: var(--color-primary);
        }

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

        /* ===== 文章头部 ===== */
        .article-header {
            padding: 48px 0 32px;
            background: #fff;
            border-bottom: 1px solid rgba(0,0,0,0.06);
        }

        .article-breadcrumb {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.9rem;
            color: var(--color-text-muted);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }

        .article-breadcrumb a {
            color: var(--color-text-muted);
        }

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

        .article-breadcrumb .sep {
            color: #ccc;
        }

        .article-breadcrumb .current {
            color: var(--color-text-body);
            font-weight: 500;
        }

        .article-header h1 {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--color-text-dark);
            line-height: 1.3;
            margin-bottom: 16px;
            letter-spacing: -0.02em;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 20px;
            font-size: 0.9rem;
            color: var(--color-text-muted);
        }

        .article-meta .meta-item {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .article-meta .meta-item i {
            font-size: 0.85rem;
            color: var(--color-primary);
        }

        .article-meta .category-tag {
            display: inline-block;
            padding: 4px 14px;
            background: rgba(255, 102, 0, 0.12);
            color: var(--color-primary);
            border-radius: var(--radius-badge);
            font-size: 0.8rem;
            font-weight: 600;
        }

        /* ===== 正文区域 ===== */
        .article-body-wrap {
            padding: 40px 0 60px;
        }

        .article-content {
            max-width: 800px;
            margin: 0 auto;
            background: #fff;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 40px 48px;
        }

        .article-content .prose {
            font-size: 1.0625rem;
            line-height: 1.85;
            color: var(--color-text-body);
        }

        .article-content .prose h2 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--color-text-dark);
            margin: 36px 0 16px;
            padding-bottom: 10px;
            border-bottom: 2px solid rgba(255, 102, 0, 0.15);
        }

        .article-content .prose h3 {
            font-size: 1.3rem;
            font-weight: 600;
            color: var(--color-text-dark);
            margin: 28px 0 12px;
        }

        .article-content .prose p {
            margin-bottom: 1.2em;
        }

        .article-content .prose img {
            border-radius: 12px;
            margin: 24px auto;
            box-shadow: 0 4px 20px rgba(0,0,0,0.08);
        }

        .article-content .prose blockquote {
            border-left: 4px solid var(--color-primary);
            padding: 16px 24px;
            margin: 24px 0;
            background: rgba(255, 102, 0, 0.04);
            border-radius: 0 12px 12px 0;
            color: var(--color-text-muted);
            font-style: italic;
        }

        .article-content .prose ul, .article-content .prose ol {
            padding-left: 24px;
            margin-bottom: 1.2em;
        }

        .article-content .prose li {
            margin-bottom: 6px;
        }

        .article-content .prose a {
            color: var(--color-primary);
            text-decoration: underline;
            text-underline-offset: 3px;
        }

        .article-content .prose a:hover {
            color: var(--color-primary-dark);
        }

        .article-not-found {
            text-align: center;
            padding: 80px 20px;
        }

        .article-not-found i {
            font-size: 4rem;
            color: #ddd;
            margin-bottom: 20px;
        }

        .article-not-found h2 {
            font-size: 1.6rem;
            color: var(--color-text-dark);
            margin-bottom: 12px;
        }

        .article-not-found p {
            color: var(--color-text-muted);
            margin-bottom: 24px;
        }

        .article-not-found a {
            display: inline-block;
            padding: 12px 36px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
            color: #fff;
            border-radius: var(--radius-button);
            font-weight: 600;
            box-shadow: 0 4px 14px rgba(255, 102, 0, 0.3);
            transition: all 0.2s;
        }

        .article-not-found a:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(255, 102, 0, 0.4);
        }

        /* ===== 相关推荐 ===== */
        .related-section {
            padding: 60px 0;
            background: #fff;
        }

        .related-section h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--color-text-dark);
            text-align: center;
            margin-bottom: 40px;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .related-card {
            background: var(--color-bg-light);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all 0.3s;
        }

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

        .related-card .card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }

        .related-card .card-body {
            padding: 20px;
        }

        .related-card .card-body h3 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--color-text-dark);
            margin-bottom: 8px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-card .card-body p {
            font-size: 0.9rem;
            color: var(--color-text-muted);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 12px;
        }

        .related-card .card-body .meta {
            font-size: 0.8rem;
            color: #aaa;
        }

        .back-to-list {
            text-align: center;
            margin-top: 40px;
        }

        .back-to-list a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            border: 2px solid var(--color-primary);
            color: var(--color-primary);
            border-radius: var(--radius-button);
            font-weight: 600;
            transition: all 0.2s;
        }

        .back-to-list a:hover {
            background: var(--color-primary);
            color: #fff;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: linear-gradient(135deg, #141432, #1A237E);
            color: rgba(255,255,255,0.85);
            padding: 60px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }

        .footer-brand .logo {
            margin-bottom: 16px;
        }

        .footer-brand .logo span:last-child {
            color: #fff;
        }

        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            opacity: 0.75;
            margin-bottom: 20px;
            max-width: 360px;
        }

        .footer-social {
            display: flex;
            gap: 12px;
        }

        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255,255,255,0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255,255,255,0.7);
            font-size: 1.1rem;
            transition: all 0.3s;
        }

        .footer-social a:hover {
            background: var(--color-primary);
            color: #fff;
            transform: translateY(-3px);
        }

        .footer-col h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-col h4::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 30px;
            height: 3px;
            background: var(--color-primary);
            border-radius: 2px;
        }

        .footer-col ul {
            list-style: none;
        }

        .footer-col ul li {
            margin-bottom: 10px;
        }

        .footer-col ul li a {
            color: rgba(255,255,255,0.65);
            font-size: 0.9rem;
            transition: all 0.2s;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .footer-col ul li a:hover {
            color: var(--color-primary);
            transform: translateX(4px);
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 24px 0;
            font-size: 0.85rem;
            opacity: 0.55;
            flex-wrap: wrap;
            gap: 10px;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1023px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }

            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .hamburger {
                display: flex;
            }

            .nav-menu {
                display: none;
                position: absolute;
                top: 72px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                padding: 16px 20px;
                box-shadow: 0 12px 40px rgba(0,0,0,0.1);
                border-top: 1px solid rgba(0,0,0,0.04);
                gap: 4px;
            }

            .nav-menu.open {
                display: flex;
            }

            .nav-menu a {
                padding: 12px 16px;
                width: 100%;
                border-radius: 8px;
            }

            .nav-menu a.nav-cta {
                margin-top: 8px;
                justify-content: center;
            }

            .bottom-tab {
                display: flex;
            }

            .site-header {
                height: 64px;
            }

            .article-header h1 {
                font-size: 1.6rem;
            }

            .article-content {
                padding: 24px 20px;
            }

            .article-content .prose {
                font-size: 1rem;
            }

            .related-grid {
                grid-template-columns: 1fr;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }

            body {
                padding-bottom: 64px;
            }
        }

        @media (max-width: 520px) {
            .article-header h1 {
                font-size: 1.3rem;
            }

            .article-meta {
                gap: 12px;
                font-size: 0.8rem;
            }

            .article-content {
                padding: 20px 16px;
                border-radius: 12px;
            }

            .container {
                padding: 0 12px;
            }
        }

        /* ===== 辅助类 ===== */
        .text-primary { color: var(--color-primary); }
        .bg-primary { background-color: var(--color-primary); }
        .gradient-primary {
            background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
        }
        .gradient-hero {
            background: linear-gradient(135deg, var(--color-secondary), var(--color-primary));
        }