/* roulang page: index */
:root {
      --primary: #0F2D59;
      --primary-dark: #0A192F;
      --accent: #10B981;
      --bg-light: #F8FAFC;
      --text-main: #0F172A;
      --text-muted: #475569;
      --border-color: #E2E8F0;
    }
    body {
      color: var(--text-main);
      background-color: #ffffff;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
      line-height: 1.65;
    }
    .hero-bg {
      background-image: linear-gradient(135deg, rgba(10, 25, 47, 0.92) 0%, rgba(15, 45, 89, 0.88) 100%), url('/assets/images/975abeb9be4c109b.webp');
      background-size: cover;
      background-position: center;
    }
    .dark-block-bg {
      background-image: radial-gradient(circle at top right, rgba(16, 185, 129, 0.12), transparent 50%), linear-gradient(180deg, #0A192F 0%, #061120 100%);
    }
    .card-transition {
      transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .card-transition:hover {
      transform: translateY(-4px);
      box-shadow: 0 14px 28px -8px rgba(15, 45, 89, 0.12);
    }
    details summary::-webkit-details-marker {
      display: none;
    }