/* roulang page: index */
:root {
      --bg-main: #F8FAFC;
      --bg-alt: #F1F5F9;
      --text-main: #0F172A;
      --text-muted: #64748B;
      --color-primary: #0EA5E9;
      --color-accent: #10B981;
      --border-color: #E2E8F0;
    }
    body {
      background-color: var(--bg-main);
      color: var(--text-main);
      font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      overflow-x: hidden;
    }
    .custom-scrollbar::-webkit-scrollbar {
      width: 6px;
      height: 6px;
    }
    .custom-scrollbar::-webkit-scrollbar-thumb {
      background: #CBD5E1;
      border-radius: 3px;
    }
    .faq-content {
      max-height: 0;
      transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
      overflow: hidden;
    }
    .faq-content.open {
      max-height: 500px;
      transition: max-height 0.35s ease-in-out;
    }