/* roulang page: index */
:root {
      --primary: #1E40AF;
      --accent-sky: #0284C7;
      --accent-teal: #0D9488;
      --bg-light: #F8FAFC;
      --text-main: #0F172A;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
    }
    body {
      font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
      color: #334155;
      background-color: #ffffff;
      -webkit-font-smoothing: antialiased;
    }
    .custom-shadow {
      box-shadow: 0 10px 25px -5px rgba(15, 23, 42, 0.05), 0 8px 10px -6px rgba(15, 23, 42, 0.03);
    }
    .hero-glow {
      background: radial-gradient(circle at 50% 50%, rgba(30, 64, 175, 0.15) 0%, rgba(255, 255, 255, 0) 70%);
    }
    .glass-nav {
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(8px);
    }