/* roulang page: index */
:root {
      --bg-dark: #060B18;
      --bg-card: rgba(13, 25, 48, 0.78);
      --c-blue: #0066FF;
      --c-cyan: #00F2FE;
      --c-accent: #FF5E3A;
      --border-cyan: rgba(0, 242, 254, 0.18);
    }
    body {
      background-color: var(--bg-dark);
      color: #E2E8F0;
      overflow-x: hidden;
      font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }
    .glass-card {
      background: var(--bg-card);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border: 1px solid var(--border-cyan);
      box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .glass-card:hover {
      border-color: rgba(0, 242, 254, 0.45);
      box-shadow: 0 12px 36px 0 rgba(0, 242, 254, 0.15);
    }
    .glow-btn {
      background: linear-gradient(135deg, #0052CC 0%, #00F2FE 100%);
      box-shadow: 0 0 20px rgba(0, 242, 254, 0.35);
      transition: all 0.3s ease;
    }
    .glow-btn:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 28px rgba(0, 242, 254, 0.6);
    }
    .nav-blur {
      background: rgba(6, 11, 24, 0.88);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(0, 242, 254, 0.12);
    }