/* roulang page: index */
:root {
      --primary: #1E3A8A;
      --accent: #0D9488;
      --accent-light: #06B6D4;
      --bg-page: #F8FAFC;
      --bg-panel: #FFFFFF;
      --text-main: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-page);
      color: var(--text-body);
      text-rendering: optimizeLegibility;
      -webkit-font-smoothing: antialiased;
    }
    .custom-scrollbar::-webkit-scrollbar {
      width: 6px;
      height: 6px;
    }
    .custom-scrollbar::-webkit-scrollbar-thumb {
      background: #CBD5E1;
      border-radius: 4px;
    }
    .code-box {
      background: #090D16;
      border: 1px solid #1E293B;
      box-shadow: 0 20px 40px -15px rgba(15, 23, 42, 0.4);
    }
    .faq-answer {
      transition: max-height 0.35s ease-out, opacity 0.3s ease;
    }