/* roulang page: index */
:root {
      --primary: #0F294A;
      --primary-gradient: linear-gradient(135deg, #0F294A 0%, #1E4E8C 100%);
      --accent: #FF6B35;
      --cyan: #00B4D8;
      --surface-light: #F8FAFC;
      --surface-border: #E2E8F0;
      --text-main: #0F172A;
      --text-muted: #475569;
    }
    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-main);
      background-color: #F8FAFC;
      overflow-x: hidden;
    }
    .bg-grid-pattern {
      background-size: 40px 40px;
      background-image: linear-gradient(to right, rgba(226, 232, 240, 0.4) 1px, transparent 1px),
                        linear-gradient(to bottom, rgba(226, 232, 240, 0.4) 1px, transparent 1px);
    }
    .bg-grid-dark {
      background-size: 40px 40px;
      background-image: linear-gradient(to right, rgba(255, 255, 255, 0.05) 1px, transparent 1px),
                        linear-gradient(to bottom, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
    }
    .text-balance {
      text-wrap: balance;
    }
    .number-display {
      font-feature-settings: "tnum";
      font-variant-numeric: tabular-nums;
    }
    .accordion-content {
      transition: max-height 0.35s ease, opacity 0.3s ease;
      max-height: 0;
      overflow: hidden;
      opacity: 0;
    }
    .accordion-item.active .accordion-content {
      max-height: 280px;
      opacity: 1;
    }
    .accordion-item.active .accordion-icon {
      transform: rotate(180deg);
    }