/* roulang page: index */
:root {
      --primary-color: #0891b2;
      --secondary-color: #059669;
      --dark-slate: #0f172a;
      --bg-surface: #f8fafc;
      --text-main: #334155;
      --text-light: #64748b;
      --border-line: #e2e8f0;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      color: var(--text-main);
      background-color: #ffffff;
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      -webkit-font-smoothing: antialiased;
    }
    .custom-scroll::-webkit-scrollbar {
      height: 6px;
      width: 6px;
    }
    .custom-scroll::-webkit-scrollbar-thumb {
      background: #cbd5e1;
      border-radius: 9999px;
    }
    .faq-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease-out;
    }
    .faq-active .faq-content {
      max-height: 280px;
    }
    .faq-active .faq-icon {
      transform: rotate(180deg);
    }