/* roulang page: index */
:root {
      --primary: #0052cc;
      --primary-dark: #0a2540;
      --accent: #00a389;
      --bg-light: #f8fafc;
      --text-main: #1e293b;
      --text-muted: #64748b;
      --border-color: #e2e8f0;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-main);
      background-color: #ffffff;
      overflow-x: hidden;
    }
    .custom-shadow {
      box-shadow: 0 4px 20px -2px rgba(10, 37, 64, 0.06), 0 2px 6px -1px rgba(10, 37, 64, 0.04);
    }
    .custom-shadow-hover:hover {
      box-shadow: 0 16px 32px -4px rgba(0, 82, 204, 0.12), 0 6px 12px -2px rgba(0, 82, 204, 0.06);
      transform: translateY(-3px);
    }
    .faq-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease-out;
    }
    .faq-item.active .faq-content {
      max-height: 220px;
    }
    .faq-item.active .faq-icon {
      transform: rotate(180deg);
    }