/* roulang page: index */
:root {
      --bg-gradient: radial-gradient(circle at 50% 0%, #0F1E3D 0%, #060B17 100%);
      --glass-bg: rgba(15, 30, 61, 0.65);
      --glass-border: rgba(255, 255, 255, 0.08);
      --cyan-glow: rgba(0, 210, 255, 0.15);
      --neon-glow: rgba(0, 255, 163, 0.2);
    }
    body {
      background-color: #060B17;
      color: #F8FAFC;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      overflow-x: hidden;
    }
    .glass-card {
      background: var(--glass-bg);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border: 1px solid var(--glass-border);
      box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.36);
    }
    .glass-card-hover {
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .glass-card-hover:hover {
      transform: translateY(-4px);
      border-color: rgba(0, 210, 255, 0.4);
      box-shadow: 0 12px 30px rgba(0, 210, 255, 0.2);
    }
    .btn-glow {
      background: linear-gradient(135deg, #1E6FFF 0%, #00D2FF 100%);
      position: relative;
      overflow: hidden;
      transition: all 0.3s ease;
      box-shadow: 0 0 15px rgba(0, 210, 255, 0.35);
    }
    .btn-glow:hover {
      box-shadow: 0 0 25px rgba(0, 210, 255, 0.6);
      transform: translateY(-1px);
    }
    .btn-neon {
      background: linear-gradient(135deg, #00FFA3 0%, #00D2FF 100%);
      color: #060B17;
      font-weight: 700;
      box-shadow: 0 0 16px var(--neon-glow);
      transition: all 0.3s ease;
    }
    .btn-neon:hover {
      box-shadow: 0 0 26px rgba(0, 255, 163, 0.5);
      transform: translateY(-1px);
    }
    .btn-outline-glass {
      border: 1px solid rgba(255, 255, 255, 0.15);
      background: rgba(255, 255, 255, 0.03);
      backdrop-filter: blur(8px);
      transition: all 0.3s ease;
    }
    .btn-outline-glass:hover {
      background: rgba(255, 255, 255, 0.1);
      border-color: rgba(255, 255, 255, 0.35);
    }
    .glow-tag {
      background: rgba(0, 255, 163, 0.1);
      border: 1px solid rgba(0, 255, 163, 0.3);
      color: #00FFA3;
    }
    .glow-cyan-tag {
      background: rgba(0, 210, 255, 0.1);
      border: 1px solid rgba(0, 210, 255, 0.3);
      color: #00D2FF;
    }
    /* Grid Mesh Pattern */
    .bg-grid-mesh {
      background-size: 40px 40px;
      background-image: 
        linear-gradient(to right, rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    }