/* roulang page: index */
:root {
      --bg-main: #060b19;
      --bg-darker: #030712;
      --bg-card: rgba(15, 23, 42, 0.72);
      --border-cyan: rgba(0, 210, 255, 0.25);
      --neon-cyan: #00D2FF;
      --neon-blue: #0066FF;
      --neon-green: #10B981;
    }
    body {
      background-color: var(--bg-main);
      color: #e2e8f0;
      font-family: system-ui, -apple-system, "Noto Sans SC", "PingFang SC", sans-serif;
      overflow-x: hidden;
      margin: 0;
      padding: 0;
    }
    .glass-card {
      background: var(--bg-card);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid var(--border-cyan);
      box-shadow: inset 0 1px 0 0 rgba(255, 255, 255, 0.08);
      transition: all 0.3s ease;
    }
    .glass-card:hover {
      border-color: rgba(0, 210, 255, 0.6);
      transform: translateY(-4px);
      box-shadow: 0 12px 28px -10px rgba(0, 210, 255, 0.2), inset 0 1px 0 0 rgba(255, 255, 255, 0.2);
    }
    .glow-btn-primary {
      background: linear-gradient(135deg, #0066FF, #00D2FF);
      box-shadow: 0 0 20px rgba(0, 210, 255, 0.4);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .glow-btn-primary:hover {
      box-shadow: 0 0 30px rgba(0, 210, 255, 0.75);
      transform: scale(1.03);
    }
    .hud-grid {
      background-size: 36px 36px;
      background-image: 
        linear-gradient(to right, rgba(0, 210, 255, 0.04) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(0, 210, 255, 0.04) 1px, transparent 1px);
    }
    details summary::-webkit-details-marker {
      display: none;
    }