/* roulang page: index */
:root {
      --primary-navy: #0F2942;
      --deep-navy: #0A192F;
      --accent-blue: #2563EB;
      --accent-amber: #D97706;
      --bg-surface: #F8FAFC;
    }
    body {
      font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-surface);
      color: #0F172A;
      overflow-x: hidden;
    }
    .hero-gradient {
      background: linear-gradient(135deg, rgba(15, 41, 66, 0.94) 0%, rgba(10, 25, 47, 0.96) 100%);
    }
    .custom-shadow {
      box-shadow: 0 10px 30px -5px rgba(15, 41, 66, 0.08), 0 4px 10px -2px rgba(15, 41, 66, 0.04);
    }
    .custom-card-hover {
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .custom-card-hover:hover {
      transform: translateY(-4px);
      box-shadow: 0 20px 35px -8px rgba(15, 41, 66, 0.12);
    }