/* roulang page: index */
:root {
      --primary-color: #1d4ed8;
      --accent-color: #0284c7;
      --dark-color: #0f172a;
      --bg-light: #f8fafc;
      --text-main: #334155;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-main);
      background-color: var(--bg-light);
      scroll-behavior: smooth;
    }
    .hero-bg {
      background: linear-gradient(rgba(15, 23, 42, 0.78), rgba(15, 23, 42, 0.88)), url('/assets/images/10e537c8d3b8b998.jpg') center/cover no-repeat;
    }
    .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 {
      box-shadow: 0 20px 25px -5px rgba(15, 23, 42, 0.12), 0 10px 10px -5px rgba(15, 23, 42, 0.05);
    }
    details > summary {
      list-style: none;
    }
    details > summary::-webkit-details-marker {
      display: none;
    }
    details[open] summary .faq-icon {
      transform: rotate(180deg);
    }