/* roulang page: index */
:root {
      --primary-blue: #0F4C81;
      --accent-teal: #0D9488;
      --bg-slate: #0F172A;
      --bg-muted: #F8FAFC;
      --text-main: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
    }
    body {
      color: var(--text-body);
      background-color: #FFFFFF;
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
    }
    .hero-bg {
      background: linear-gradient(135deg, rgba(15, 23, 42, 0.94) 0%, rgba(15, 76, 129, 0.88) 100%), url('/assets/images/a5be60d54341c78b.webp') center/cover no-repeat;
    }
    .dark-showcase-bg {
      background: radial-gradient(circle at 80% 20%, rgba(13, 148, 136, 0.15) 0%, transparent 50%), linear-gradient(180deg, #0B0F19 0%, #0F172A 100%);
    }
    .custom-scroll::-webkit-scrollbar {
      height: 6px;
    }
    .custom-scroll::-webkit-scrollbar-thumb {
      background: #CBD5E1;
      border-radius: 9999px;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease-out;
    }
    .faq-item.active .faq-answer {
      max-height: 300px;
    }
    .faq-item.active .faq-icon {
      transform: rotate(180deg);
    }