/* roulang page: index */
:root {
      --color-brand-dark: #0A192F;
      --color-brand-night: #0B0F17;
      --color-brand-primary: #4F46E5;
      --color-brand-cyan: #06B6D4;
      --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
      font-family: var(--font-stack);
      color: #0F172A;
      background-color: #FFFFFF;
    }
    .custom-scrollbar::-webkit-scrollbar {
      width: 6px;
      height: 6px;
    }
    .custom-scrollbar::-webkit-scrollbar-thumb {
      background: #CBD5E1;
      border-radius: 4px;
    }
    .hero-glow {
      background: radial-gradient(circle at 50% 30%, rgba(79, 70, 229, 0.15) 0%, rgba(6, 182, 212, 0.05) 50%, transparent 80%);
    }
    .code-block {
      background: #0d131f;
      border: 1px solid #1e293b;
    }