/* roulang page: index */
:root {
      --primary: #1E3A8A;
      --primary-dark: #172554;
      --accent: #F97316;
      --accent-hover: #EA580C;
      --bg-light: #F8FAFC;
      --text-main: #0F172A;
      --text-muted: #475569;
      --border-color: #E2E8F0;
    }
    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }
    .custom-container {
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 1.25rem;
      padding-right: 1.25rem;
    }
    .hero-bg {
      background-image: linear-gradient(135deg, rgba(15, 23, 42, 0.92) 0%, rgba(30, 58, 138, 0.88) 100%), url('/assets/images/dc672374de239e59.webp');
      background-size: cover;
      background-position: center;
    }
    .immersive-dark-bg {
      background-image: linear-gradient(180deg, rgba(17, 24, 39, 0.96) 0%, rgba(15, 23, 42, 0.94) 100%), url('/assets/images/0ece9836c4f1ac25.webp');
      background-size: cover;
      background-position: center;
    }
    .card-hover-effect {
      transition: transform 0.25s ease, box-shadow 0.25s ease;
    }
    .card-hover-effect:hover {
      transform: translateY(-4px);
      box-shadow: 0 12px 24px -6px rgba(0, 0, 0, 0.08);
    }