/* roulang page: index */
@import url('/assets/css/vendor/1ecd1de215-css2.css');
    :root {
      --primary: #0F172A;
      --accent: #F59E0B;
      --bg-light: #F8FAFC;
      --bg-card: #FFFFFF;
      --bg-metric: #F1F5F9;
      --text-body: #475569;
      --text-muted: #64748B;
      --text-dark: #0F172A;
      --border-light: #E2E8F0;
      --shadow-sm: 0 4px 12px rgba(0,0,0,0.04);
      --shadow-md: 0 8px 24px rgba(0,0,0,0.08);
      --radius-card: 16px;
      --radius-btn: 8px;
      --transition: all 0.2s ease;
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: 'Inter', system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
      margin: 0;
      background-color: var(--bg-light);
      color: var(--text-body);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    h1, h2, h3, h4 {
      color: var(--primary);
      font-weight: 700;
      margin-top: 0;
    }
    .container {
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }
    /* 导航固定毛玻璃 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: rgba(15, 23, 42, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      z-index: 50;
      border-bottom: 1px solid rgba(255,255,255,0.08);
    }
    .nav-link {
      color: white;
      font-weight: 500;
      font-size: 0.95rem;
      transition: var(--transition);
      position: relative;
      padding-bottom: 4px;
    }
    .nav-link:hover {
      color: var(--accent);
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--accent);
      transition: width 0.25s ease;
    }
    .nav-link:hover::after {
      width: 100%;
    }
    /* Mega面板 */
    .mega-trigger {
      cursor: pointer;
      position: relative;
    }
    .mega-panel {
      position: absolute;
      top: 100%;
      right: 0;
      margin-top: 12px;
      background: #1E293B;
      backdrop-filter: blur(16px);
      border-radius: 16px;
      padding: 24px;
      min-width: 420px;
      display: none;
      box-shadow: 0 20px 35px rgba(0,0,0,0.5);
      border: 1px solid rgba(255,255,255,0.1);
      z-index: 55;
      color: #E2E8F0;
    }
    .mega-trigger:hover .mega-panel,
    .mega-trigger:focus-within .mega-panel {
      display: flex;
      gap: 32px;
      flex-wrap: wrap;
    }
    /* 汉堡菜单纯CSS */
    #menu-toggle {
      display: none;
    }
    .menu-icon {
      display: none;
      font-size: 1.8rem;
      color: white;
      cursor: pointer;
    }
    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        width: 100%;
        background: rgba(15,23,42,0.95);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 24px;
        gap: 20px;
        border-bottom: 1px solid rgba(255,255,255,0.1);
      }
      .menu-icon {
        display: block;
      }
      #menu-toggle:checked ~ .nav-links {
        display: flex;
      }
      .mega-panel {
        position: static;
        width: 100%;
        min-width: auto;
        margin-top: 8px;
        background: rgba(30,41,59,0.9);
      }
    }
    /* 区块间距 */
    section {
      padding-top: 80px;
      padding-bottom: 80px;
    }
    @media (max-width: 768px) {
      section {
        padding-top: 48px;
        padding-bottom: 48px;
      }
    }
    /* 卡片规范 */
    .card {
      background: var(--bg-card);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      border: none;
    }
    .card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-2px);
    }
    .btn-primary {
      background: var(--accent);
      color: var(--primary);
      font-weight: 600;
      border-radius: var(--radius-btn);
      padding: 12px 24px;
      transition: var(--transition);
      display: inline-block;
      text-align: center;
      border: none;
      cursor: pointer;
      box-shadow: 0 4px 12px rgba(245,158,11,0.3);
    }
    .btn-primary:hover {
      filter: brightness(1.1);
      box-shadow: 0 6px 16px rgba(245,158,11,0.45);
    }
    .btn-outline {
      background: transparent;
      border: 1.5px solid var(--primary);
      color: var(--primary);
      font-weight: 600;
      border-radius: var(--radius-btn);
      padding: 12px 24px;
      transition: var(--transition);
      display: inline-block;
    }
    .btn-outline:hover {
      background: rgba(15,23,42,0.05);
    }
    /* 指标数字 */
    .metric-number {
      font-size: 2.5rem;
      font-weight: 800;
      color: var(--accent);
    }
    /* 对比条 */
    .progress-bar {
      height: 8px;
      border-radius: 4px;
      background: #CBD5E1;
    }
    .progress-fill {
      height: 8px;
      border-radius: 4px;
      background: var(--accent);
    }
    /* FAQ手风琴 */
    .faq-item {
      border-bottom: 1px solid var(--border-light);
    }
    .faq-question {
      cursor: pointer;
      font-weight: 600;
      font-size: 1.1rem;
      padding: 16px 0;
      display: flex;
      justify-content: space-between;
      align-items: center;
      color: var(--primary);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.35s ease;
      background: #F8FAFC;
      border-radius: 8px;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 16px;
      margin-bottom: 12px;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }
    .faq-icon {
      transition: transform 0.3s ease;
    }
    /* 装饰网格背景 */
    .hero-bg {
      background: linear-gradient(135deg, #0F172A 0%, #1E293B 100%);
      position: relative;
    }
    .dot-pattern {
      background-image: radial-gradient(rgba(255,255,255,0.08) 1px, transparent 1px);
      background-size: 24px 24px;
    }