/* roulang page: index */
:root {
      --primary: #1E40AF;
      --secondary: #0D9488;
      --accent: #EA580C;
      --bg-light: #F8FAFC;
      --text-main: #0F172A;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      color: #334155;
      background-color: #FFFFFF;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.65;
    }
    .hero-bg {
      background-image: linear-gradient(to right, rgba(15, 23, 42, 0.94), rgba(30, 64, 175, 0.82)), url('/assets/images/b833c7b541a96045.png');
      background-size: cover;
      background-position: center;
    }
    .custom-shadow {
      box-shadow: 0 4px 20px -2px rgba(30, 64, 175, 0.08);
    }
    .custom-shadow-hover:hover {
      box-shadow: 0 20px 25px -5px rgba(30, 64, 175, 0.15), 0 8px 10px -6px rgba(30, 64, 175, 0.1);
      transform: translateY(-3px);
    }
    .faq-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease-out;
    }
    .faq-item.active .faq-content {
      max-height: 280px;
    }
    .faq-item.active .faq-icon {
      transform: rotate(180deg);
    }