/* roulang page: index */
:root {
      --primary: #1E40AF;
      --accent: #0284C7;
      --cyan: #0D9488;
      --bg-base: #F8FAFC;
      --text-main: #0F172A;
      --text-body: #334155;
      --text-sub: #64748B;
      --border-color: #E2E8F0;
    }
    body {
      background-color: var(--bg-base);
      color: var(--text-body);
      overflow-x: hidden;
    }
    .custom-shadow {
      box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.05), 0 2px 6px -1px rgba(15, 23, 42, 0.03);
    }
    .custom-shadow-hover:hover {
      box-shadow: 0 20px 25px -5px rgba(30, 64, 175, 0.08), 0 8px 10px -6px rgba(30, 64, 175, 0.04);
      transform: translateY(-4px);
    }
    .hero-gradient {
      background: radial-gradient(circle at 80% 20%, rgba(2, 132, 199, 0.12) 0%, transparent 60%),
                  radial-gradient(circle at 10% 80%, rgba(30, 64, 175, 0.08) 0%, transparent 50%);
    }
    /* 轮播过渡 */
    .slider-item {
      display: none;
      opacity: 0;
      transition: opacity 0.6s ease-in-out;
    }
    .slider-item.active {
      display: block;
      opacity: 1;
    }
    /* 手风琴平滑旋转 */
    details summary::-webkit-details-marker {
      display: none;
    }
    details[open] summary .faq-icon {
      transform: rotate(180deg);
    }