/* roulang page: index */
:root {
      --primary-navy: #1E3A8A;
      --primary-teal: #0D9488;
      --primary-purple: #6366F1;
      --bg-base: #F8FAFC;
      --text-main: #0F172A;
      --text-muted: #64748B;
      --border-light: #E2E8F0;
    }
    body {
      background-color: var(--bg-base);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      overflow-x: hidden;
    }
    .custom-card-hover {
      transition: all 300ms cubic-bezier(0.4, 0, 0.2, 1);
    }
    .custom-card-hover:hover {
      transform: translateY(-4px);
    }
    .badge-gradient {
      background: linear-gradient(135deg, rgba(13, 148, 136, 0.08) 0%, rgba(99, 102, 241, 0.08) 100%);
      border: 1px solid rgba(99, 102, 241, 0.2);
    }
    .btn-gradient {
      background: linear-gradient(135deg, #0D9488 0%, #6366F1 100%);
      transition: opacity 0.2s ease, transform 0.2s ease;
    }
    .btn-gradient:hover {
      opacity: 0.95;
      transform: translateY(-1px);
    }
    .text-gradient {
      background: linear-gradient(135deg, #0D9488 0%, #6366F1 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .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);
    }