/* roulang page: index */
:root {
      --primary: #0F2744;
      --secondary: #1E3A8A;
      --accent: #0284C7;
      --success: #059669;
      --bg-slate: #F8FAFC;
      --border-color: #E2E8F0;
    }
    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
    }
    .video-hero-bg {
      background-image: linear-gradient(rgba(15, 39, 68, 0.85), rgba(15, 39, 68, 0.92)), url('/assets/images/649ce4120cd0e3a9.webp');
      background-size: cover;
      background-position: center;
    }
    .grid-pattern {
      background-image: radial-gradient(rgba(2, 132, 199, 0.12) 1px, transparent 1px);
      background-size: 24px 24px;
    }
    .dark-card-glow:hover {
      box-shadow: 0 12px 30px -10px rgba(14, 165, 233, 0.3);
    }