/* roulang page: index */
:root {
      --primary-color: #1d4ed8;
      --primary-dark: #0f172a;
      --accent-color: #0284c7;
      --bg-light: #f8fafc;
      --text-main: #0f172a;
      --text-muted: #64748b;
      --border-color: #e2e8f0;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      color: var(--text-main);
      background-color: #ffffff;
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
    }
    .custom-shadow {
      box-shadow: 0 10px 30px -5px rgba(15, 23, 42, 0.06), 0 4px 6px -2px rgba(15, 23, 42, 0.02);
    }
    .custom-shadow-hover:hover {
      box-shadow: 0 20px 40px -10px rgba(15, 23, 42, 0.12), 0 8px 10px -4px rgba(15, 23, 42, 0.04);
      transform: translateY(-3px);
    }
    .gradient-hero-overlay {
      background: linear-gradient(135deg, rgba(15, 23, 42, 0.92) 0%, rgba(30, 58, 138, 0.85) 60%, rgba(2, 132, 199, 0.78) 100%);
    }