/* roulang page: index */
:root {
      --brand-navy: #0F172A;
      --brand-blue: #2563EB;
      --brand-emerald: #10B981;
      --brand-surface: #F8FAFC;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: #334155;
      background-color: #F8FAFC;
      line-height: 1.75;
    }
    .custom-scroll::-webkit-scrollbar {
      height: 6px;
    }
    .custom-scroll::-webkit-scrollbar-thumb {
      background: #CBD5E1;
      border-radius: 4px;
    }
    .hero-gradient {
      background: radial-gradient(circle at 80% 20%, rgba(37,99,235,0.08) 0%, transparent 60%),
                  radial-gradient(circle at 10% 80%, rgba(16,185,129,0.06) 0%, transparent 50%);
    }