/* roulang page: index */
:root {
      --primary: #1e40af;
      --primary-gradient: linear-gradient(135deg, #1e40af 0%, #0284c7 100%);
      --accent: #10b981;
      --accent-warm: #f59e0b;
      --text-main: #0f172a;
      --text-body: #334155;
      --text-muted: #64748b;
      --bg-page: #f8fafc;
      --bg-card: #ffffff;
      --border-light: #e2e8f0;
    }
    
    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }

    body {
      background-color: var(--bg-page);
      color: var(--text-body);
      line-height: 1.6;
    }

    .btn-gradient {
      background: linear-gradient(135deg, #1e40af 0%, #0284c7 100%);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .btn-gradient:hover {
      box-shadow: 0 10px 20px -5px rgba(2, 132, 199, 0.4);
      transform: translateY(-2px);
    }

    .btn-accent {
      background: linear-gradient(135deg, #059669 0%, #10b981 100%);
      transition: all 0.3s ease;
    }
    .btn-accent:hover {
      box-shadow: 0 10px 20px -5px rgba(16, 185, 129, 0.4);
      transform: translateY(-2px);
    }

    .card-modern {
      background-color: #ffffff;
      border: 1px solid #f1f5f9;
      border-radius: 1.25rem;
      transition: all 0.3s ease;
    }
    .card-modern:hover {
      transform: translateY(-4px);
      box-shadow: 0 20px 30px -10px rgba(15, 23, 42, 0.08);
      border-color: #cbd5e1;
    }

    .badge-capsule {
      display: inline-flex;
      align-items: center;
      padding: 0.35rem 0.85rem;
      border-radius: 9999px;
      font-size: 0.825rem;
      font-weight: 600;
      letter-spacing: 0.025em;
    }

    .num-tabular {
      font-variant-numeric: tabular-nums;
      font-feature-settings: "tnum";
    }

    /* FAQ 手风琴样式微调 */
    details > summary {
      list-style: none;
    }
    details > summary::-webkit-details-marker {
      display: none;
    }
    details[open] summary .faq-icon {
      transform: rotate(180deg);
    }