/* roulang page: index */
:root {
      --primary: #0EA5E9;
      --primary-hover: #0284C7;
      --secondary: #F97316;
      --bg-light: #F8FAFC;
      --text-main: #0F172A;
      --text-muted: #64748B;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      color: var(--text-main);
      background-color: var(--bg-light);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
      line-height: 1.75;
      overflow-x: hidden;
    }
    .custom-shadow {
      box-shadow: 0 10px 30px -5px rgba(14, 165, 233, 0.1), 0 4px 12px -2px rgba(15, 23, 42, 0.05);
    }
    .hero-bg {
      background: linear-gradient(135deg, rgba(11, 19, 43, 0.92) 0%, rgba(15, 23, 42, 0.88) 100%), url('/assets/images/b8b905987f916f22.jpg') center/cover no-repeat;
    }
    .glass-card {
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(12px);
      border: 1px solid rgba(226, 232, 240, 0.8);
    }
    .faq-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease-out, padding 0.3s ease;
    }
    .faq-item.active .faq-content {
      max-height: 220px;
      padding-top: 0.75rem;
    }
    .faq-item.active .faq-chevron {
      transform: rotate(180deg);
    }