/* roulang page: index */
:root {
      --bg-dark: #060b19;
      --bg-card: rgba(15, 23, 42, 0.72);
      --border-glow: rgba(56, 189, 248, 0.22);
      --primary-cyan: #06b6d4;
      --primary-blue: #0ea5e9;
      --text-main: #f8fafc;
      --text-muted: #94a3b8;
    }
    
    * {
      box-sizing: border-box;
    }
    
    body {
      background-color: var(--bg-dark);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", Inter, sans-serif;
      overflow-x: hidden;
    }

    .glass-panel {
      background: var(--bg-card);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid var(--border-glow);
    }

    .glass-card-hover {
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .glass-card-hover:hover {
      border-color: rgba(6, 182, 212, 0.55);
      transform: translateY(-4px);
      box-shadow: 0 12px 30px -10px rgba(14, 165, 233, 0.28);
    }

    .glow-btn {
      background: linear-gradient(135deg, #0284c7 0%, #06b6d4 100%);
      box-shadow: 0 0 20px rgba(14, 165, 233, 0.42);
      transition: all 0.3s ease;
    }
    .glow-btn:hover {
      box-shadow: 0 0 32px rgba(6, 182, 212, 0.75);
      transform: translateY(-2px);
    }

    .radial-spotlight {
      background: radial-gradient(circle at 50% 30%, rgba(14, 165, 233, 0.15) 0%, rgba(6, 11, 25, 0) 70%);
    }

    /* 手风琴折叠平滑过渡 */
    details > summary::-webkit-details-marker {
      display: none;
    }