/* roulang page: index */
:root {
      --bg-deep: #070b19;
      --bg-card: rgba(15, 23, 42, 0.72);
      --border-glow: rgba(0, 210, 255, 0.24);
      --primary-blue: #0066ff;
      --cyan-bright: #00d2ff;
      --text-main: #f8fafc;
      --text-muted: #94a3b8;
    }
    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }
    body {
      background-color: var(--bg-deep);
      color: var(--text-main);
      overflow-x: hidden;
    }
    .glass-card {
      background: var(--bg-card);
      border: 1px solid rgba(255, 255, 255, 0.08);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .glass-card:hover {
      border-color: rgba(0, 210, 255, 0.4);
      box-shadow: 0 12px 40px rgba(0, 102, 255, 0.25);
      transform: translateY(-2px);
    }
    .glow-btn {
      background: linear-gradient(135deg, #0066ff 0%, #00d2ff 100%);
      box-shadow: 0 0 20px rgba(0, 102, 255, 0.45);
      transition: all 0.3s ease;
    }
    .glow-btn:hover {
      box-shadow: 0 0 30px rgba(0, 210, 255, 0.7);
      filter: brightness(1.1);
      transform: translateY(-1px);
    }
    .glow-border {
      border: 1px solid rgba(0, 210, 255, 0.3);
      box-shadow: inset 0 0 15px rgba(0, 210, 255, 0.1), 0 0 15px rgba(0, 210, 255, 0.1);
    }
    .section-divider {
      background: radial-gradient(circle, rgba(0,210,255,0.15) 0%, rgba(7,11,25,0) 70%);
    }
    details summary::-webkit-details-marker {
      display: none;
    }