/* roulang page: index */
:root {
      --color-navy: #0F2B48;
      --color-primary: #2563EB;
      --color-amber: #F59E0B;
      --color-bg-alt: #F8FAFC;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
      color: #1E293B;
      background-color: #FFFFFF;
      overflow-x: hidden;
    }
    .hero-bg-overlay {
      background: linear-gradient(135deg, rgba(11, 25, 44, 0.92) 0%, rgba(15, 43, 72, 0.85) 60%, rgba(37, 99, 235, 0.7) 100%);
    }
    .custom-scrollbar::-webkit-scrollbar {
      height: 6px;
    }
    .custom-scrollbar::-webkit-scrollbar-thumb {
      background: #CBD5E1;
      border-radius: 4px;
    }