/* roulang page: index */
:root {
      --primary: #0E7490;
      --primary-hover: #085367;
      --surface-dark: #0F172A;
      --surface-slate: #1E293B;
      --border-color: #E2E8F0;
      --accent-green: #10B981;
      --accent-amber: #F59E0B;
      --bg-light: #F8FAFC;
    }
    body {
      background-color: #ffffff;
      color: #334155;
      font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', system-ui, sans-serif;
      line-height: 1.68;
    }
    .hero-mask {
      background: linear-gradient(135deg, rgba(15, 23, 42, 0.94) 0%, rgba(14, 116, 144, 0.82) 100%);
    }
    .custom-shadow {
      box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05), 0 1px 2px rgba(0, 0, 0, 0.03);
    }
    .custom-shadow-hover {
      transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .custom-shadow-hover:hover {
      transform: translateY(-3px);
      box-shadow: 0 12px 24px -6px rgba(14, 116, 144, 0.12), 0 4px 10px -2px rgba(15, 23, 42, 0.05);
      border-color: #0E7490;
    }
    .tab-active {
      border-bottom: 2px solid #0E7490;
      color: #0E7490;
      font-weight: 600;
    }
    .accordion-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease-out;
    }
    .accordion-item.active .accordion-content {
      max-height: 380px;
    }
    .accordion-item.active .accordion-icon {
      transform: rotate(180deg);
    }