/* roulang page: index */
:root {
      --brand-dark: #0A192F;
      --brand-deep: #070F1E;
      --brand-primary: #0077B6;
      --brand-cyan: #00B4D8;
      --brand-gold: #D4AF37;
      --bg-light: #F8FAFC;
      --bg-card: #FFFFFF;
      --text-main: #1E293B;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
      --shadow-sm: 0 4px 12px rgba(10, 25, 47, 0.05);
      --shadow-lg: 0 16px 36px -12px rgba(10, 25, 47, 0.12);
      --radius-md: 12px;
      --radius-lg: 18px;
      --radius-xl: 24px;
      --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; font-size: 16px; }
    body { font-family: var(--font-stack); background-color: var(--bg-light); color: var(--text-main); line-height: 1.6; -webkit-font-smoothing: antialiased; }
    a { color: inherit; text-decoration: none; transition: all 0.25s ease; }
    img { max-width: 100%; height: auto; display: block; }
    button, input, select { font-family: inherit; }
    .container { width: 100%; max-width: 1220px; margin: 0 auto; padding: 0 24px; }

    /* 顶部导航 */
    .top-meta-bar { background: #050B14; color: #94A3B8; font-size: 0.8rem; padding: 6px 0; border-bottom: 1px solid rgba(255,255,255,0.08); }
    .top-meta-bar .container { display: flex; justify-content: space-between; align-items: center; }
    .site-header { position: sticky; top: 0; z-index: 999; background: rgba(255, 255, 255, 0.95); backdrop-filter: blur(12px); border-bottom: 1px solid var(--border-color); }
    .nav-wrapper { display: flex; align-items: center; justify-content: space-between; height: 74px; }
    .brand-logo { font-size: 1.35rem; font-weight: 800; color: var(--brand-dark); display: flex; align-items: center; gap: 8px; letter-spacing: -0.5px; }
    .brand-logo .dot { width: 10px; height: 10px; background: var(--brand-cyan); border-radius: 50%; box-shadow: 0 0 10px var(--brand-cyan); }
    .desktop-nav { display: flex; align-items: center; gap: 28px; list-style: none; }
    .desktop-nav a { font-weight: 600; color: #334155; font-size: 0.95rem; }
    .desktop-nav a:hover { color: var(--brand-primary); }
    .btn-gradient { background: linear-gradient(135deg, var(--brand-cyan) 0%, var(--brand-primary) 100%); color: #fff; padding: 10px 24px; border-radius: 999px; font-weight: 600; display: inline-flex; align-items: center; justify-content: center; box-shadow: 0 6px 20px rgba(0, 180, 216, 0.35); border: none; cursor: pointer; transition: transform 0.2s ease, box-shadow 0.2s ease; }
    .btn-gradient:hover { transform: translateY(-2px); box-shadow: 0 10px 26px rgba(0, 180, 216, 0.45); }
    .btn-outline { background: transparent; color: var(--brand-dark); border: 1px solid #CBD5E1; padding: 10px 24px; border-radius: 999px; font-weight: 600; display: inline-flex; align-items: center; justify-content: center; }
    .btn-outline:hover { background: #F1F5F9; border-color: #94A3B8; }

    /* 通用组件 */
    .section-spacing { padding: 90px 0; }
    .section-head { text-align: center; max-width: 820px; margin: 0 auto 50px auto; }
    .section-badge { display: inline-flex; align-items: center; gap: 6px; padding: 4px 14px; border-radius: 999px; background: rgba(0, 180, 216, 0.1); color: var(--brand-primary); font-size: 0.85rem; font-weight: 700; margin-bottom: 12px; }
    .section-badge::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--brand-cyan); }
    .section-badge.gold { background: rgba(212, 175, 55, 0.15); color: #9A7B1C; }
    .section-badge.gold::before { background: var(--brand-gold); }
    .section-title { font-size: 2.1rem; color: var(--brand-dark); line-height: 1.3; font-weight: 800; letter-spacing: -0.5px; margin-bottom: 12px; }
    .section-desc { font-size: 1.05rem; color: var(--text-muted); line-height: 1.7; }
    .glass-card { background: var(--bg-card); border-radius: var(--radius-lg); border: 1px solid var(--border-color); box-shadow: var(--shadow-sm); transition: transform 0.3s ease, box-shadow 0.3s ease; }
    .glass-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }

    /* 1. 首屏全宽矮横幅 */
    #hero { position: relative; background: #081326; color: #fff; overflow: hidden; padding: 70px 0 80px 0; }
    .hero-bg { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: 0.28; filter: brightness(0.85); }
    .hero-container { position: relative; z-index: 2; display: grid; grid-template-columns: 1.25fr 0.95fr; gap: 48px; align-items: center; }
    .hero-content h1 { font-size: 2.7rem; font-weight: 800; line-height: 1.25; margin-bottom: 18px; letter-spacing: -1px; }
    .hero-content p { font-size: 1.05rem; color: #CBD5E1; margin-bottom: 28px; line-height: 1.8; }
    .hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 32px; }
    .hero-indicators { display: flex; gap: 24px; border-top: 1px solid rgba(255,255,255,0.15); padding-top: 20px; }
    .hero-ind-item h4 { font-size: 1.4rem; color: var(--brand-cyan); font-weight: 800; }
    .hero-ind-item span { font-size: 0.82rem; color: #94A3B8; }
    .hero-preview { background: rgba(15, 23, 42, 0.75); border: 1px solid rgba(255,255,255,0.15); border-radius: var(--radius-xl); padding: 24px; backdrop-filter: blur(16px); }
    .preview-header { display: flex; justify-content: space-between; align-items: center; border-bottom: 1px solid rgba(255,255,255,0.1); padding-bottom: 12px; margin-bottom: 16px; }
    .dot-group { display: flex; gap: 6px; }
    .dot-group span { width: 10px; height: 10px; border-radius: 50%; display: block; }
    .dot-red { background: #EF4444; } .dot-yellow { background: #F59E0B; } .dot-green { background: #10B981; }
    .preview-status { font-size: 0.78rem; color: #38BDF8; font-family: monospace; }
    .preview-body img { border-radius: var(--radius-md); width: 100%; object-fit: cover; max-height: 250px; }

    /* 2. 技术架构底座 */
    #overview { background: #FFFFFF; }
    .overview-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: 50px; align-items: center; }
    .overview-thumb { border-radius: var(--radius-lg); overflow: hidden; position: relative; border: 1px solid var(--border-color); }
    .compliance-card { margin-top: 20px; padding: 18px 24px; background: #F1F5F9; border-left: 4px solid var(--brand-primary); border-radius: 8px; }
    .compliance-card h4 { font-size: 0.95rem; color: var(--brand-dark); font-weight: 700; margin-bottom: 4px; }
    .compliance-card p { font-size: 0.85rem; color: var(--text-muted); }

    /* 3. 六维功能矩阵 */
    #features { background: #F8FAFC; }
    .matrix-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
    .matrix-card { padding: 32px 28px; background: #FFF; border-radius: var(--radius-lg); border: 1px solid var(--border-color); transition: all 0.3s; }
    .matrix-card:hover { transform: translateY(-4px); border-color: var(--brand-cyan); box-shadow: var(--shadow-lg); }
    .matrix-card h3 { font-size: 1.2rem; color: var(--brand-dark); margin: 16px 0 10px 0; }
    .matrix-card p { font-size: 0.92rem; color: var(--text-muted); line-height: 1.6; }
    .matrix-icon { width: 48px; height: 48px; border-radius: 12px; background: rgba(0, 180, 216, 0.1); color: var(--brand-primary); display: flex; align-items: center; justify-content: center; font-weight: 800; font-size: 1.2rem; }

    /* 4. 全周期场景矩阵 */
    #scenarios { background: #FFFFFF; }
    .scenarios-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 30px; }
    .scenario-item { border-radius: var(--radius-lg); border: 1px solid var(--border-color); overflow: hidden; background: #FFF; display: flex; flex-direction: column; }
    .scenario-item img { height: 200px; width: 100%; object-fit: cover; }
    .scenario-content { padding: 24px; flex: 1; display: flex; flex-direction: column; justify-content: space-between; }
    .scenario-content h3 { font-size: 1.25rem; color: var(--brand-dark); margin-bottom: 10px; }
    .scenario-content p { font-size: 0.92rem; color: var(--text-muted); margin-bottom: 18px; }
    .scenario-tags { display: flex; gap: 8px; flex-wrap: wrap; }
    .scenario-tags span { font-size: 0.78rem; padding: 4px 10px; background: #F1F5F9; color: #475569; border-radius: 6px; }

    /* 5. 交互演示大卡 */
    #interface { background: #F1F5F9; }
    .interface-panel { background: #FFF; border-radius: var(--radius-xl); border: 1px solid var(--border-color); padding: 36px; box-shadow: var(--shadow-sm); }
    .panel-nav { display: flex; gap: 16px; margin-bottom: 24px; border-bottom: 1px solid var(--border-color); padding-bottom: 12px; }
    .panel-tab { font-weight: 700; color: #64748B; cursor: pointer; padding: 6px 14px; border-radius: 8px; }
    .panel-tab.active { background: var(--brand-dark); color: #FFF; }
    .panel-body { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 32px; align-items: center; }
    .panel-body img { border-radius: var(--radius-md); box-shadow: 0 4px 16px rgba(0,0,0,0.06); }
    .panel-bullets li { list-style: none; margin-bottom: 16px; position: relative; padding-left: 24px; font-size: 0.95rem; color: #334155; }
    .panel-bullets li::before { content: "✓"; position: absolute; left: 0; color: var(--brand-cyan); font-weight: 900; }

    /* 6. 深色高对比理念区 */
    #philosophy { background: var(--brand-deep); color: #FFF; }
    .philosophy-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 50px; align-items: center; }
    .philosophy-grid h2 { color: #FFF; }
    .philosophy-grid p { color: #94A3B8; font-size: 1rem; line-height: 1.8; margin-bottom: 24px; }
    .security-badges { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
    .sec-badge-card { background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.1); border-radius: var(--radius-md); padding: 18px; }
    .sec-badge-card h4 { font-size: 0.95rem; color: var(--brand-gold); margin-bottom: 6px; }
    .sec-badge-card p { font-size: 0.82rem; color: #CBD5E1; margin: 0; }

    /* 7. 客户成功案例 */
    #cases { background: #FFFFFF; }
    .cases-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
    .case-card { border: 1px solid var(--border-color); border-radius: var(--radius-lg); padding: 30px; display: flex; flex-direction: column; justify-content: space-between; }
    .case-header { display: flex; justify-content: space-between; margin-bottom: 16px; }
    .case-header .category { font-size: 0.8rem; font-weight: 700; color: var(--brand-primary); }
    .case-metric { margin: 20px 0; padding: 14px; background: #F8FAFC; border-radius: 8px; text-align: center; }
    .case-metric h4 { font-size: 1.6rem; color: var(--brand-dark); font-weight: 800; }
    .case-metric p { font-size: 0.82rem; color: var(--text-muted); margin: 0; }

    /* 8. 关键业务指标数据条 */
    #stats { background: linear-gradient(135deg, #0A192F 0%, #0F2A4A 100%); color: #FFF; padding: 60px 0; border-top: 1px solid rgba(255,255,255,0.1); border-bottom: 1px solid rgba(255,255,255,0.1); }
    .stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center; }
    .stat-item h3 { font-size: 2.8rem; font-weight: 800; color: var(--brand-cyan); margin-bottom: 4px; font-variant-numeric: tabular-nums; }
    .stat-item p { font-size: 0.92rem; color: #CBD5E1; }

    /* 9. 真实口碑墙 */
    #reviews { background: #F8FAFC; }
    .reviews-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
    .review-card { background: #FFF; border-radius: var(--radius-lg); padding: 28px; border: 1px solid var(--border-color); }
    .review-stars { color: var(--brand-gold); margin-bottom: 12px; letter-spacing: 2px; }
    .review-text { font-size: 0.94rem; color: #475569; line-height: 1.7; margin-bottom: 18px; }
    .review-author { display: flex; align-items: center; gap: 12px; }
    .author-avatar { width: 42px; height: 42px; border-radius: 50%; background: #E2E8F0; display: flex; align-items: center; justify-content: center; font-weight: 700; color: var(--brand-dark); }
    .author-info h5 { font-size: 0.9rem; color: var(--brand-dark); }
    .author-info span { font-size: 0.78rem; color: #94A3B8; }

    /* 10. 行业动态与前沿观察 */
    #insights { background: #FFFFFF; }
    .insights-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
    .insight-card { border: 1px solid var(--border-color); border-radius: var(--radius-md); overflow: hidden; background: #FFF; }
    .insight-card img { height: 140px; width: 100%; object-fit: cover; }
    .insight-body { padding: 18px; }
    .insight-body .date { font-size: 0.78rem; color: #94A3B8; margin-bottom: 6px; }
    .insight-body h4 { font-size: 0.95rem; color: var(--brand-dark); line-height: 1.4; margin-bottom: 8px; }
    .insight-body p { font-size: 0.84rem; color: var(--text-muted); line-height: 1.5; }

    /* 11. FAQ 手风琴 */
    #faq { background: #F8FAFC; }
    .faq-container { max-width: 860px; margin: 0 auto; display: flex; flex-direction: column; gap: 16px; }
    .faq-item { background: #FFF; border: 1px solid var(--border-color); border-radius: var(--radius-md); overflow: hidden; transition: all 0.25s ease; }
    .faq-summary { padding: 20px 24px; font-weight: 700; font-size: 1.05rem; color: var(--brand-dark); cursor: pointer; display: flex; justify-content: space-between; align-items: center; list-style: none; }
    .faq-summary::-webkit-details-marker { display: none; }
    .faq-summary::after { content: "+"; font-size: 1.4rem; color: var(--brand-primary); font-weight: 400; transition: transform 0.25s; }
    details[open] .faq-summary::after { content: "-"; transform: rotate(180deg); }
    .faq-content { padding: 0 24px 22px 24px; font-size: 0.95rem; color: var(--text-muted); line-height: 1.7; border-top: 1px solid #F1F5F9; padding-top: 16px; }

    /* 12. 决策与开通引导区 */
    #contact { background: #FFFFFF; }
    .contact-card { background: linear-gradient(135deg, #0A192F 0%, #0F2038 100%); border-radius: var(--radius-xl); color: #FFF; padding: 50px 48px; display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 48px; align-items: center; }
    .contact-card h2 { font-size: 2.1rem; color: #FFF; margin-bottom: 12px; }
    .contact-card p { font-size: 0.95rem; color: #94A3B8; margin-bottom: 24px; line-height: 1.6; }
    .contact-features { display: flex; flex-direction: column; gap: 12px; }
    .contact-feature-item { display: flex; align-items: center; gap: 10px; font-size: 0.9rem; color: #CBD5E1; }
    .contact-feature-item span { width: 18px; height: 18px; border-radius: 50%; background: var(--brand-cyan); color: #000; font-size: 0.75rem; display: flex; align-items: center; justify-content: center; font-weight: 800; }
    .contact-form { background: #FFF; border-radius: var(--radius-lg); padding: 30px; color: var(--text-main); }
    .form-group { margin-bottom: 16px; }
    .form-group label { display: block; font-size: 0.85rem; font-weight: 600; margin-bottom: 6px; color: #334155; }
    .form-control { width: 100%; padding: 11px 14px; border: 1px solid #CBD5E1; border-radius: 8px; font-size: 0.9rem; outline: none; }
    .form-control:focus { border-color: var(--brand-primary); }

    /* 全局页脚 */
    .site-footer { background: #050B14; color: #64748B; font-size: 0.88rem; padding: 60px 0 28px 0; border-top: 1px solid rgba(255,255,255,0.06); }
    .footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 40px; margin-bottom: 40px; }
    .footer-col h4 { color: #F8FAFC; font-size: 1rem; margin-bottom: 18px; font-weight: 700; }
    .footer-links { list-style: none; display: flex; flex-direction: column; gap: 10px; }
    .footer-links a:hover { color: var(--brand-cyan); }
    .footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); padding-top: 24px; display: flex; justify-content: space-between; align-items: center; font-size: 0.82rem; }
    .seo-notes { display: none; }

    /* 移动端汉堡切换与响应式 */
    .mobile-menu-btn { display: none; background: none; border: none; font-size: 1.5rem; cursor: pointer; color: var(--brand-dark); }
    @media (max-width: 1024px) {
      .matrix-grid, .cases-grid, .reviews-grid { grid-template-columns: repeat(2, 1fr); }
      .insights-grid { grid-template-columns: repeat(2, 1fr); }
      .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 30px; }
      .hero-container, .overview-grid, .philosophy-grid, .panel-body, .contact-card { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 768px) {
      .top-meta-bar { display: none; }
      .desktop-nav, .nav-action-btn { display: none; }
      .mobile-menu-btn { display: block; }
      .matrix-grid, .scenarios-grid, .cases-grid, .reviews-grid, .insights-grid, .footer-grid { grid-template-columns: 1fr; }
      .stats-grid { grid-template-columns: 1fr; }
      .hero-content h1 { font-size: 2.1rem; }
      .section-spacing { padding: 60px 0; }
      .contact-card { padding: 30px 20px; }
    }