/* roulang page: index */
:root {
      --primary: #0F3D6E;
      --secondary: #0066FF;
      --dark-bg: #0B1320;
      --gray-bg: #F4F7FA;
      --border-color: #E2E8F0;
      --text-main: #1A202C;
      --text-body: #4A5568;
    }
    body {
      color: var(--text-body);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      -webkit-font-smoothing: antialiased;
    }
    .hero-bg-overlay {
      background: linear-gradient(135deg, rgba(15, 61, 110, 0.94) 0%, rgba(11, 19, 32, 0.95) 100%);
    }
    .custom-scroll-mt {
      scroll-margin-top: 5.5rem;
    }