/* roulang page: index */
:root {
      --brand-primary: #0F2042;
      --brand-accent: #C59B27;
      --brand-accent-hover: #B0881E;
      --brand-cambridge: #4A6B82;
      --bg-surface: #F8F9FA;
      --bg-ivory: #F4F1EA;
      --bg-midnight: #091326;
      --text-main: #1A202C;
      --text-muted: #4A5568;
      --text-light: #718096;
      --border-subtle: rgba(226, 232, 240, 0.85);
    }
    body {
      color: var(--text-main);
      background-color: var(--bg-surface);
      overflow-x: hidden;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.75;
    }
    .text-balance {
      text-wrap: balance;
    }
    .accordion-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .accordion-item.active .accordion-content {
      max-height: 500px;
    }
    .accordion-item.active .accordion-icon {
      transform: rotate(180deg);
    }
    .card-hover-lift {
      transition: transform 0.3s ease, box-shadow 0.3s ease;
    }
    .card-hover-lift:hover {
      transform: translateY(-4px);
      box-shadow: 0 12px 28px -6px rgba(15, 32, 66, 0.12), 0 6px 12px -4px rgba(15, 32, 66, 0.08);
    }
    :focus-visible {
      outline: 2px solid var(--brand-accent);
      outline-offset: 2px;
    }