/* roulang page: index */
:root {
      --primary: #0F52BA;
      --secondary: #00A86B;
      --navy: #0A2540;
      --bg-soft: #F8FAFC;
      --text-main: #334155;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-main);
      background-color: var(--bg-soft);
      line-height: 1.75;
    }
    .hero-bg {
      background: linear-gradient(135deg, rgba(10, 37, 64, 0.88) 0%, rgba(15, 82, 186, 0.75) 100%), url('/assets/images/c02a5365d3082410.webp') center/cover no-repeat;
    }
    .custom-card {
      transition: all 0.28s ease;
    }
    .custom-card:hover {
      transform: translateY(-4px);
    }