/* roulang page: index */
:root {
      --bg-dark: #0B0D14;
      --bg-surface: #131722;
      --bg-card: #1A202C;
      --border-color: #262E3D;
      --primary-cyan: #06B6D4;
      --primary-purple: #7C3AED;
    }
    body {
      background-color: var(--bg-dark);
      color: #94A3B8;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      overflow-x: hidden;
    }
    .neon-border {
      border: 1px solid var(--border-color);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .neon-border:hover {
      border-color: rgba(6, 182, 212, 0.6);
      box-shadow: 0 0 20px rgba(6, 182, 212, 0.15);
      transform: translateY(-2px);
    }
    .grid-pattern {
      background-image: radial-gradient(rgba(124, 58, 237, 0.12) 1px, transparent 1px), radial-gradient(rgba(6, 182, 212, 0.08) 1px, transparent 1px);
      background-size: 32px 32px;
      background-position: 0 0, 16px 16px;
    }
    .glass-nav {
      background: rgba(11, 13, 20, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }