/* roulang page: index */
:root {
      --primary: #1E40AF;
      --primary-hover: #2563EB;
      --accent: #0284C7;
      --dark-navy: #0F172A;
      --surface-light: #F8FAFC;
      --border-color: #E2E8F0;
    }
    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }
    body {
      background-color: #F8FAFC;
      color: #334155;
      overflow-x: hidden;
    }
    .custom-shadow {
      box-shadow: 0 10px 30px -10px rgba(30, 64, 175, 0.08), 0 4px 12px -4px rgba(15, 23, 42, 0.04);
    }
    .custom-shadow-hover:hover {
      box-shadow: 0 20px 40px -12px rgba(30, 64, 175, 0.16), 0 8px 16px -6px rgba(15, 23, 42, 0.06);
    }
    .hero-bg-overlay {
      background: linear-gradient(135deg, rgba(15, 23, 42, 0.88) 0%, rgba(30, 64, 175, 0.82) 100%), url('/assets/images/f124a50169f7bd3c.webp') center/cover no-repeat;
    }
    .dark-section-bg {
      background: radial-gradient(circle at top right, #1E293B 0%, #0F172A 100%);
    }
    .details-animated summary::-webkit-details-marker {
      display: none;
    }