/* roulang page: index */
:root {
      --primary-color: #2563eb;
      --primary-dark: #1d4ed8;
      --accent-color: #0284c7;
      --text-main: #0f172a;
      --text-muted: #475569;
      --bg-light: #f8fafc;
      --border-color: #e2e8f0;
    }
    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }
    .custom-shadow {
      box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.06), 0 2px 6px -1px rgba(15, 23, 42, 0.04);
    }
    .custom-shadow-hover {
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .custom-shadow-hover:hover {
      transform: translateY(-4px);
      box-shadow: 0 20px 25px -5px rgba(37, 99, 235, 0.1), 0 10px 10px -5px rgba(37, 99, 235, 0.04);
      border-color: #bfdbfe;
    }
    .accordion-content {
      transition: max-height 0.3s ease-out, opacity 0.3s ease-out;
      max-height: 0;
      opacity: 0;
      overflow: hidden;
    }
    .accordion-content.open {
      max-height: 240px;
      opacity: 1;
    }
    .hero-bg {
      background-image: linear-gradient(135deg, rgba(255, 255, 255, 0.94) 0%, rgba(241, 245, 249, 0.88) 100%), url('/assets/images/8daf6960e27ef434.webp');
      background-size: cover;
      background-position: center;
    }