/* roulang page: index */
:root {
      --primary: #0F172A;
      --secondary: #0EA5E9;
      --surface-light: #F8FAFC;
      --text-main: #0F172A;
      --text-muted: #475569;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      color: var(--text-main);
      background-color: #FFFFFF;
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
      letter-spacing: 0.015em;
    }
    .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(14, 165, 233, 0.15), transparent 70%);
    }