/* roulang page: index */
:root {
      --primary: #0B1E33;
      --accent: #F5A623;
      --bg: #F8FAFC;
      --card: #FFFFFF;
      --text: #1E293B;
      --text-secondary: #64748B;
      --border-light: rgba(0,0,0,0.06);
      --shadow-sm: 0 4px 12px rgba(0,0,0,0.04);
      --shadow-md: 0 8px 24px rgba(0,0,0,0.08);
      --radius-lg: 16px;
      --radius-pill: 40px;
      --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--bg);
      color: var(--text);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    .container {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }
    /* 数字/英文优化 */
    .font-mono {
      font-family: 'Inter', system-ui, monospace;
      font-weight: 600;
    }
    /* 频道横向滚动隐藏滚动条 */
    .hide-scrollbar::-webkit-scrollbar {
      display: none;
    }
    .hide-scrollbar {
      -ms-overflow-style: none;
      scrollbar-width: none;
    }
    /* 导航激活指示条 */
    .nav-pill.active {
      color: var(--accent);
      border-bottom: 2px solid var(--accent);
    }
    /* 自定义卡片与交互 */
    .card {
      background: var(--card);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-light);
      transition: all 0.2s ease;
    }
    .card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-2px);
    }
    .btn-primary {
      background-color: var(--accent);
      color: var(--primary);
      border-radius: var(--radius-pill);
      font-weight: 600;
      padding: 12px 28px;
      transition: background 0.2s, transform 0.1s;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border: none;
      cursor: pointer;
      text-decoration: none;
    }
    .btn-primary:hover {
      background-color: #E09510;
      transform: scale(1.02);
    }
    .btn-outline {
      background: transparent;
      border: 1.5px solid var(--primary);
      color: var(--primary);
      border-radius: var(--radius-pill);
      font-weight: 600;
      padding: 12px 28px;
      transition: all 0.2s;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      text-decoration: none;
    }
    .btn-outline:hover {
      background: rgba(11,30,51,0.05);
    }
    /* 数据徽章大数字 */
    .stat-number {
      font-size: 2.5rem;
      font-weight: 700;
      color: var(--accent);
      line-height: 1.2;
    }
    /* 流程虚线连接 */
    .step-connector {
      border-top: 2px dashed #CBD5E1;
      flex: 1;
      margin: 0 8px;
      align-self: center;
    }
    @media (max-width: 768px) {
      .container {
        padding-left: 16px;
        padding-right: 16px;
      }
      h1 {
        font-size: 2.2rem !important;
      }
      h2 {
        font-size: 1.8rem !important;
      }
      .stat-number {
        font-size: 2rem;
      }
      .step-connector {
        display: none;
      }
      .mobile-stack {
        flex-direction: column;
        align-items: center;
      }
    }
    /* FAQ细节 */
    details summary {
      list-style: none;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 16px;
      background: var(--card);
      border-radius: 12px;
      font-weight: 600;
    }
    details[open] summary {
      background: #F1F5F9;
    }
    details summary::-webkit-details-marker {
      display: none;
    }
    .faq-content {
      padding: 0 16px 16px 16px;
      background: #F8FAFC;
      border-radius: 0 0 12px 12px;
      color: #334155;
    }
    /* 图片hover放大 */
    .img-hover img {
      transition: transform 0.3s ease;
    }
    .img-hover:hover img {
      transform: scale(1.05);
    }