/* roulang page: index */
:root {
      --primary: #1d4ed8;
      --primary-dark: #1e293b;
      --accent-sky: #0284c7;
      --accent-emerald: #059669;
      --bg-page: #f8fafc;
      --surface-white: #ffffff;
      --text-main: #0f172a;
      --text-muted: #64748b;
      --border-color: #e2e8f0;
      --radius-box: 1rem;
      --shadow-soft: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
    }

    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      overflow-x: hidden;
      line-height: 1.65;
    }

    .glass-nav {
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      background-color: rgba(255, 255, 255, 0.92);
      border-bottom: 1px solid rgba(226, 232, 240, 0.8);
    }

    .badge-status {
      display: inline-flex;
      align-items: center;
      padding: 0.25rem 0.75rem;
      font-size: 0.8125rem;
      font-weight: 500;
      border-radius: 9999px;
    }

    .card-modern {
      background: #ffffff;
      border: 1px solid #f1f5f9;
      border-radius: 1rem;
      box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.04), 0 1px 2px 0 rgba(0, 0, 0, 0.02);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    .card-modern:hover {
      box-shadow: 0 12px 28px -4px rgba(29, 78, 216, 0.08), 0 4px 10px -2px rgba(0, 0, 0, 0.04);
      transform: translateY(-3px);
      border-color: #dbeafe;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease-out, padding 0.3s ease;
    }

    .faq-item.active .faq-answer {
      max-height: 200px;
      padding-top: 0.75rem;
    }

    .faq-item.active .faq-chevron {
      transform: rotate(180deg);
    }