/* roulang page: index */
:root {
      --primary: #0284C7;
      --accent: #0D9488;
      --bg-page: #F8FAFC;
      --text-main: #0F172A;
      --text-muted: #475569;
    }
    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      letter-spacing: -0.01em;
    }
    body {
      background-color: var(--bg-page);
      color: var(--text-main);
      overflow-x: hidden;
    }
    .custom-shadow {
      box-shadow: 0 4px 20px -4px rgba(2, 132, 199, 0.08);
    }
    .code-glow {
      box-shadow: 0 0 25px rgba(14, 165, 233, 0.15);
    }