/* roulang page: index */
:root {
      --primary: #1D4ED8;
      --accent: #0284C7;
      --bg-light: #F8FAFC;
      --text-main: #0F172A;
      --text-muted: #475569;
      --border-color: #E2E8F0;
    }
    body {
      color: var(--text-main);
      background-color: #FFFFFF;
      font-family: Inter, system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
      line-height: 1.65;
    }
    .custom-scroll::-webkit-scrollbar {
      height: 6px;
    }
    .custom-scroll::-webkit-scrollbar-thumb {
      background: #cbd5e1;
      border-radius: 4px;
    }
    .card-shadow {
      box-shadow: 0 4px 6px -1px rgba(15, 23, 42, 0.05), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
      transition: all 0.3s ease;
    }
    .card-shadow:hover {
      transform: translateY(-4px);
      box-shadow: 0 20px 25px -5px rgba(29, 78, 216, 0.08);
    }
    details summary::-webkit-details-marker {
      display: none;
    }
    details[open] .faq-icon {
      transform: rotate(180deg);
    }