/* roulang page: index */
:root {
      --bg-dark: #0D1117;
      --bg-surface: #161B22;
      --cyan: #00F2FE;
      --orange: #FF5E36;
      --border-line: rgba(240, 246, 252, 0.12);
    }
    body {
      background-color: var(--bg-dark);
      color: #F0F6FC;
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      overflow-x: hidden;
    }
    .glow-cyan {
      box-shadow: 0 0 25px rgba(0, 242, 254, 0.18);
    }
    .glow-orange {
      box-shadow: 0 0 20px rgba(255, 94, 54, 0.2);
    }
    .glass-nav {
      background: rgba(13, 17, 23, 0.88);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
    }
    .card-hover {
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .card-hover:hover {
      transform: translateY(-4px);
      border-color: rgba(0, 242, 254, 0.45);
    }
    .pulse-dot {
      animation: pulseAnim 2s infinite;
    }
    @keyframes pulseAnim {
      0% { transform: scale(0.95); opacity: 0.8; }
      50% { transform: scale(1.2); opacity: 1; }
      100% { transform: scale(0.95); opacity: 0.8; }
    }