/* roulang page: index */
:root {
      --bg-dark: #0B0F17;
      --accent-cyan: #00E5FF;
      --accent-jade: #00D59D;
      --text-main: #F1F5F9;
      --text-muted: #8A99AD;
      --border-subtle: #243247;
    }
    html, body {
      background-color: var(--bg-dark);
      color: var(--text-main);
      overflow-x: hidden;
      font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', -apple-system, sans-serif;
      -webkit-font-smoothing: antialiased;
    }
    .grid-bg-overlay {
      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);
      background-size: 40px 40px;
    }
    .neon-border-hover {
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .neon-border-hover:hover {
      border-color: rgba(0, 229, 255, 0.45);
      box-shadow: 0 0 25px rgba(0, 213, 157, 0.15);
      transform: translateY(-2px);
    }