/* roulang page: index */
:root {
      --primary: #00E5FF;
      --secondary: #00E676;
      --accent: #FF9100;
      --bg-dark: #0B0E14;
      --bg-surface: #161B22;
      --text-main: #F1F5F9;
      --text-muted: #94A3B8;
      --border-line: rgba(255, 255, 255, 0.08);
    }
    body {
      background-color: var(--bg-dark);
      color: var(--text-main);
      font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
      overflow-x: hidden;
    }
    .code-mask {
      background: radial-gradient(circle at 50% 0%, rgba(0, 229, 255, 0.08) 0%, transparent 70%);
    }
    .neon-border {
      border: 1px solid var(--border-line);
      transition: border-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
    }
    .neon-border:hover {
      border-color: rgba(0, 229, 255, 0.4);
      transform: translateY(-4px);
      box-shadow: 0 10px 25px -5px rgba(0, 229, 255, 0.1);
    }
    .hero-bg-overlay {
      background: linear-gradient(180deg, rgba(11, 14, 20, 0.85) 0%, rgba(11, 14, 20, 0.98) 100%);
    }