/* roulang page: index */
:root {
      --bg-dark: #0a0f1d;
      --card-bg: rgba(16, 26, 54, 0.75);
      --neon-cyan: #00d2ff;
      --neon-green: #00f5a0;
      --border-cyan: rgba(0, 210, 255, 0.2);
    }
    body {
      background-color: var(--bg-dark);
      color: #e2e8f0;
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
      overflow-x: hidden;
    }
    .glass-panel {
      background: var(--card-bg);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid var(--border-cyan);
    }
    .glass-panel:hover {
      border-color: rgba(0, 210, 255, 0.45);
    }
    .btn-glow-cyan {
      background: linear-gradient(135deg, #00d2ff 0%, #3b82f6 100%);
      box-shadow: 0 0 20px rgba(0, 210, 255, 0.35);
      transition: all 0.25s ease-in-out;
    }
    .btn-glow-cyan:hover {
      box-shadow: 0 0 28px rgba(0, 210, 255, 0.65);
      transform: translateY(-2px);
    }
    .btn-glow-green {
      background: linear-gradient(135deg, #00f5a0 0%, #10b981 100%);
      box-shadow: 0 0 20px rgba(0, 245, 160, 0.35);
      transition: all 0.25s ease-in-out;
    }
    .btn-glow-green:hover {
      box-shadow: 0 0 28px rgba(0, 245, 160, 0.65);
      transform: translateY(-2px);
    }
    .gradient-text-cyan {
      background: linear-gradient(135deg, #ffffff 30%, #00d2ff 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .grid-bg-overlay {
      background-image: radial-gradient(rgba(0, 210, 255, 0.08) 1px, transparent 1px);
      background-size: 32px 32px;
    }
    .hero-mask {
      background: linear-gradient(180deg, rgba(10, 15, 29, 0.85) 0%, rgba(10, 15, 29, 0.96) 100%);
    }