/* roulang page: index */
:root {
      --primary: #6366F1;
      --primary-dark: #4F46E5;
      --secondary: #06B6D4;
      --accent: #8B5CF6;
      --bg-dark: #0F172A;
      --text-main: #0F172A;
      --text-muted: #64748B;
    }
    html { scroll-behavior: smooth; }
    body { font-family: system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif; color: #334155; }
    .bg-grid-pattern {
      background-size: 32px 32px;
      background-image: linear-gradient(to right, rgba(255, 255, 255, 0.05) 1px, transparent 1px),
                        linear-gradient(to bottom, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
    }
    .badge-signal {
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .badge-signal::before {
      content: '';
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background-color: #10B981;
      box-shadow: 0 0 8px #10B981;
      animation: pulse 1.8s infinite;
    }
    @keyframes pulse {
      0%, 100% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.4; transform: scale(0.85); }
    }