/* roulang page: index */
:root {
      --primary: #0284C7;
      --primary-hover: #0369A1;
      --bg-surface: #F8FAFC;
      --text-main: #0F172A;
      --text-sub: #334155;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
      --card-shadow: 0 10px 25px -5px rgba(2, 132, 199, 0.05), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
    }
    body {
      color: var(--text-sub);
      background-color: var(--bg-surface);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    }
    .custom-shadow {
      box-shadow: var(--card-shadow);
    }
    .hero-bg-cover {
      background-image: linear-gradient(rgba(15, 23, 42, 0.88), rgba(15, 23, 42, 0.82)), url('/assets/images/dd015ed72a19d4b0.webp');
      background-size: cover;
      background-position: center;
    }
    .deep-pattern {
      background-image: radial-gradient(rgba(56, 189, 248, 0.1) 1px, transparent 1px);
      background-size: 24px 24px;
    }
    details summary::-webkit-details-marker {
      display: none;
    }