/* roulang page: index */
:root {
      --bg-dark: #080C14;
      --card-bg: rgba(15, 23, 42, 0.72);
      --border-cyan: rgba(0, 242, 254, 0.18);
      --glow-cyan: rgba(0, 242, 254, 0.45);
      --neon-green: #00FFA3;
    }
    body {
      background-color: #080C14;
      color: #E2E8F0;
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      overflow-x: hidden;
    }
    .glass-card {
      background: var(--card-bg);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid var(--border-cyan);
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    }
    .glass-card-hover {
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .glass-card-hover:hover {
      border-color: rgba(0, 242, 254, 0.45);
      transform: translateY(-4px);
      box-shadow: 0 16px 36px rgba(0, 242, 254, 0.15);
    }
    .btn-glow {
      background: linear-gradient(135deg, #00F2FE 0%, #4FACFE 100%);
      color: #080C14;
      box-shadow: 0 0 22px rgba(0, 242, 254, 0.4);
      transition: all 0.25s ease;
    }
    .btn-glow:hover {
      box-shadow: 0 0 32px rgba(0, 242, 254, 0.75);
      transform: scale(1.02);
    }
    .btn-outline-glow {
      border: 1px solid rgba(0, 242, 254, 0.35);
      background: rgba(8, 12, 20, 0.6);
      backdrop-filter: blur(8px);
      color: #00F2FE;
      transition: all 0.25s ease;
    }
    .btn-outline-glow:hover {
      border-color: #00F2FE;
      background: rgba(0, 242, 254, 0.1);
      box-shadow: 0 0 20px rgba(0, 242, 254, 0.25);
    }
    .pulse-dot {
      display: inline-block;
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background-color: var(--neon-green);
      box-shadow: 0 0 10px var(--neon-green);
      animation: pulseAnimation 2s infinite;
    }
    @keyframes pulseAnimation {
      0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 255, 163, 0.7); }
      70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(0, 255, 163, 0); }
      100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 255, 163, 0); }
    }
    .grid-bg-overlay {
      background-size: 40px 40px;
      background-image: 
        linear-gradient(to right, rgba(0, 242, 254, 0.03) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(0, 242, 254, 0.03) 1px, transparent 1px);
    }