/* roulang page: index */
:root {
      --bg-primary: #070B19;
      --bg-secondary: #0B132B;
      --accent-cyan: #00F0FF;
      --accent-blue: #0072FF;
      --text-main: #F8FAFC;
      --text-muted: #94A3B8;
      --border-glow: rgba(0, 240, 255, 0.18);
    }
    body {
      background-color: var(--bg-primary);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      overflow-x: hidden;
    }
    .glass-card {
      background: rgba(15, 23, 42, 0.75);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid var(--border-glow);
    }
    .glass-card-hover {
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .glass-card-hover:hover {
      border-color: rgba(0, 240, 255, 0.5);
      transform: translateY(-4px);
      box-shadow: 0 16px 36px -12px rgba(0, 240, 255, 0.25);
    }
    .btn-glow {
      background: linear-gradient(135deg, #00F0FF 0%, #0072FF 100%);
      box-shadow: 0 0 20px rgba(0, 240, 255, 0.4);
      transition: all 0.25s ease;
    }
    .btn-glow:hover {
      box-shadow: 0 0 30px rgba(0, 240, 255, 0.7);
      transform: translateY(-2px);
    }
    .btn-outline {
      border: 1px solid rgba(0, 240, 255, 0.4);
      transition: all 0.25s ease;
    }
    .btn-outline:hover {
      background: rgba(0, 240, 255, 0.1);
      border-color: var(--accent-cyan);
    }
    .bg-grid-pattern {
      background-image: radial-gradient(rgba(0, 240, 255, 0.08) 1px, transparent 1px);
      background-size: 32px 32px;
    }
    /* 手风琴平滑过度 */
    details summary::-webkit-details-marker {
      display: none;
    }