/* roulang page: index */
:root {
      --primary: #0052CC;
      --primary-dark: #0747A6;
      --primary-light: #EBF3FF;
      --bg-slate: #F8FAFC;
      --bg-dark: #0B192C;
      --text-main: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
    }
    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }
    body {
      color: var(--text-body);
      background-color: #ffffff;
      margin: 0;
      padding: 0;
      line-height: 1.65;
    }
    .hero-bg {
      background-image: linear-gradient(to bottom, rgba(11, 25, 44, 0.85), rgba(7, 71, 166, 0.82)), url('/assets/images/398581e0e7b08bea.webp');
      background-size: cover;
      background-position: center;
    }
    .custom-scroll::-webkit-scrollbar {
      height: 6px;
    }
    .custom-scroll::-webkit-scrollbar-thumb {
      background: #CBD5E1;
      border-radius: 4px;
    }
    .faq-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease-out;
    }
    .faq-active .faq-content {
      max-height: 200px;
    }
    .faq-active .faq-icon {
      transform: rotate(180deg);
    }