/* roulang page: index */
:root {
      --bg-base: #0B0F19;
      --bg-card: rgba(15, 23, 42, 0.72);
      --border-soft: rgba(255, 255, 255, 0.08);
      --border-glow: rgba(0, 242, 254, 0.35);
      --primary-blue: #0066FF;
      --neon-cyan: #00F2FE;
      --text-main: #F8FAFC;
      --text-muted: #94A3B8;
    }
    body {
      background-color: var(--bg-base);
      color: var(--text-main);
      font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      overflow-x: hidden;
      line-height: 1.75;
    }
    .glass-card {
      background: var(--bg-card);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid var(--border-soft);
      box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5), 0 0 20px 0 rgba(0, 102, 255, 0.12);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .glass-card:hover {
      border-color: var(--border-glow);
      box-shadow: 0 14px 35px -8px rgba(0, 0, 0, 0.6), 0 0 25px 0 rgba(0, 242, 254, 0.22);
      transform: translateY(-2px);
    }
    .glow-btn {
      background: linear-gradient(135deg, #0066FF 0%, #0052CC 100%);
      box-shadow: 0 0 22px rgba(0, 102, 255, 0.55);
      transition: all 0.25s ease-in-out;
    }
    .glow-btn:hover {
      box-shadow: 0 0 32px rgba(0, 242, 254, 0.75);
      transform: translateY(-2px);
    }
    .badge-chip {
      background: rgba(0, 102, 255, 0.15);
      border: 1px solid rgba(0, 242, 254, 0.3);
      color: #00F2FE;
    }
    details summary::-webkit-details-marker {
      display: none;
    }