/* roulang page: index */
:root {
      --bg-dark: #0A0F1D;
      --card-bg: rgba(17, 24, 39, 0.75);
      --border-blue: rgba(59, 130, 246, 0.2);
    }
    body {
      background-color: var(--bg-dark);
      color: #E2E8F0;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }
    .glass-card {
      background: var(--card-bg);
      backdrop-filter: blur(12px);
      border: 1px solid var(--border-blue);
      transition: all 0.3s ease;
    }
    .glass-card:hover {
      border-color: rgba(59, 130, 246, 0.5);
      box-shadow: 0 10px 30px rgba(29, 99, 255, 0.15);
    }
    .btn-glow-blue {
      box-shadow: 0 0 20px rgba(29, 99, 255, 0.45);
      transition: all 0.25s ease;
    }
    .btn-glow-blue:hover {
      box-shadow: 0 0 32px rgba(59, 130, 246, 0.75);
      transform: translateY(-2px);
    }