/* roulang page: index */
:root {
      --primary-gradient: linear-gradient(135deg, #4f46e5 0%, #2563eb 50%, #0d9488 100%);
      --card-shadow: 0 10px 30px -5px rgba(0, 0, 0, 0.05), 0 20px 25px -5px rgba(0, 0, 0, 0.03);
      --card-hover-shadow: 0 20px 35px -5px rgba(37, 99, 235, 0.12), 0 12px 20px -6px rgba(0, 0, 0, 0.08);
    }
    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      text-rendering: optimizeLegibility;
      -webkit-font-smoothing: antialiased;
    }
    .custom-card {
      box-shadow: var(--card-shadow);
      transition: all 0.28s ease-in-out;
    }
    .custom-card:hover {
      box-shadow: var(--card-hover-shadow);
      transform: translateY(-3px);
    }
    .bg-gradient-brand {
      background: var(--primary-gradient);
    }
    details summary::-webkit-details-marker {
      display: none;
    }