/* roulang page: index */
:root {
      --bg-main: #080D1A;
      --bg-secondary: #0F172A;
      --accent-cyan: #00F2FE;
      --accent-sky: #4FACFE;
      --accent-purple: #7F00FF;
      --text-pure: #F8FAFC;
      --text-muted: #94A3B8;
      --text-dim: #64748B;
      --border-glow: rgba(0, 242, 254, 0.25);
    }
    body {
      background-color: var(--bg-main);
      color: var(--text-pure);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      overflow-x: hidden;
      margin: 0;
      padding: 0;
    }
    .glass-card {
      background: rgba(15, 23, 42, 0.7);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid rgba(255, 255, 255, 0.08);
      box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .glass-card:hover {
      box-shadow: 0 0 25px rgba(0, 242, 254, 0.25);
      border-color: rgba(0, 242, 254, 0.4);
      transform: translateY(-2px);
    }
    .btn-glow {
      background: linear-gradient(135deg, #00F2FE 0%, #4FACFE 100%);
      box-shadow: 0 0 20px rgba(0, 242, 254, 0.4);
      transition: all 0.25s ease;
    }
    .btn-glow:hover {
      box-shadow: 0 0 30px rgba(0, 242, 254, 0.7);
      transform: translateY(-2px);
    }
    .btn-ghost {
      background: rgba(15, 23, 42, 0.8);
      border: 1px solid rgba(0, 242, 254, 0.4);
      transition: all 0.25s ease;
    }
    .btn-ghost:hover {
      border-color: #00F2FE;
      box-shadow: 0 0 15px rgba(0, 242, 254, 0.3);
      color: #00F2FE;
    }
    .tech-border-glow {
      position: relative;
    }
    .tech-border-glow::after {
      content: '';
      position: absolute;
      inset: -1px;
      background: linear-gradient(90deg, transparent, rgba(0,242,254,0.3), transparent);
      z-index: -1;
      border-radius: inherit;
    }
    /* 自定义手风琴动画 */
    details summary::-webkit-details-marker {
      display: none;
    }