/* roulang page: index */
:root {
      --primary: #0F3B4C;
      --primary-dark: #0B2530;
      --accent: #D97706;
      --accent-hover: #B45309;
      --bg-light: #F8FAFC;
      --text-main: #334155;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
    }
    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
    }
    body {
      color: var(--text-main);
      background-color: #FFFFFF;
      line-height: 1.65;
    }
    .custom-shadow {
      box-shadow: 0 4px 12px -2px rgba(15, 59, 76, 0.06), 0 2px 4px -2px rgba(15, 59, 76, 0.04);
    }
    .custom-shadow-hover:hover {
      transform: translateY(-3px);
      box-shadow: 0 14px 24px -4px rgba(15, 59, 76, 0.12), 0 6px 8px -3px rgba(15, 59, 76, 0.06);
    }
    details summary::-webkit-details-marker {
      display: none;
    }