/* roulang page: index */
:root {
      --brand-green: #00FF87;
      --brand-blue: #0EA5E9;
      --brand-dark: #0B0F17;
      --brand-surface: #111827;
      --text-main: #0F172A;
      --text-muted: #64748B;
      --border-glow: rgba(0, 255, 135, 0.25);
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      background-color: #0B0F17;
      color: #F8FAFC;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", PingFang SC, "Microsoft YaHei", sans-serif;
    }
    .neon-border {
      border: 1px solid rgba(0, 255, 135, 0.2);
      transition: all 0.3s ease;
    }
    .neon-border:hover {
      border-color: rgba(0, 255, 135, 0.6);
      box-shadow: 0 0 15px rgba(0, 255, 135, 0.25);
    }
    .text-gradient {
      background: linear-gradient(135deg, #FFFFFF 0%, #00FF87 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .pulse-dot {
      animation: pulseGlow 2s infinite;
    }
    @keyframes pulseGlow {
      0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 255, 135, 0.7); }
      70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(0, 255, 135, 0); }
      100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 255, 135, 0); }
    }