/* roulang page: index */
:root {
      --brand-primary: #1e3a8a;
      --brand-secondary: #2563eb;
      --brand-accent: #059669;
      --bg-light: #f8fafc;
      --text-main: #0f172a;
      --text-muted: #475569;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      color: var(--text-main);
      background-color: var(--bg-light);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.68;
    }
    .hero-mask {
      background: linear-gradient(135deg, rgba(15, 23, 42, 0.88) 0%, rgba(30, 58, 138, 0.85) 60%, rgba(16, 185, 129, 0.75) 100%);
    }
    .custom-gradient-cta {
      background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 50%, #06b6d4 100%);
    }
    .glass-pill {
      background: rgba(255, 255, 255, 0.15);
      backdrop-filter: blur(10px);
      -webkit-backdrop-filter: blur(10px);
      border: 1px solid rgba(255, 255, 255, 0.25);
    }
    .card-hover {
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .card-hover:hover {
      transform: translateY(-4px);
      box-shadow: 0 20px 30px -10px rgba(30, 58, 138, 0.12), 0 10px 15px -5px rgba(0, 0, 0, 0.04);
    }
    details summary::-webkit-details-marker {
      display: none;
    }