/* roulang page: index */
:root {
      --brand-primary: #00A389;
      --brand-primary-dark: #0F766E;
      --brand-accent: #D97706;
      --brand-dark: #0D1117;
      --brand-surface: #161B22;
      --brand-light: #F8FAFC;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.75;
      letter-spacing: 0.015em;
      color: #0F172A;
      background-color: #FFFFFF;
      overflow-x: hidden;
    }
    .custom-scrollbar::-webkit-scrollbar {
      height: 6px;
    }
    .custom-scrollbar::-webkit-scrollbar-thumb {
      background: #CBD5E1;
      border-radius: 4px;
    }
    .hero-glow {
      background: radial-gradient(circle at 50% 30%, rgba(0, 163, 137, 0.15) 0%, rgba(13, 17, 23, 0) 70%);
    }