/* roulang page: index */
:root {
      --primary-gradient: linear-gradient(135deg, #0284c7 0%, #0d9488 100%);
    }
    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }
    .hero-bg {
      background-image: linear-gradient(rgba(15, 23, 42, 0.78), rgba(15, 23, 42, 0.88)), url('/assets/images/486c13f7023c1fc1.webp');
      background-size: cover;
      background-position: center;
    }
    .tech-bg {
      background-image: linear-gradient(rgba(15, 23, 42, 0.92), rgba(15, 23, 42, 0.96)), url('/assets/images/34147ba13525d2a1.webp');
      background-size: cover;
      background-position: center;
    }
    .cta-banner-bg {
      background: linear-gradient(135deg, #0369a1 0%, #0d9488 100%);
    }
    .card-shadow {
      box-shadow: 0 10px 25px -5px rgba(15, 23, 42, 0.05), 0 8px 10px -6px rgba(15, 23, 42, 0.01);
    }
    .accordion-content {
      transition: max-height 0.3s ease-out, opacity 0.2s ease;
    }