body {
  font-size: 16px !important;
  line-height: 1.8 !important;
  color: #1f2937 !important;
}

h1 { font-size: 2.2rem !important; color:#0f172a !important; }
h2 { font-size: 1.8rem !important; color:#111827 !important; }
h3 { font-size: 1.5rem !important; color:#111827 !important; }

.text-primary { color:#2563eb !important; }
.text-danger  { color:#ef4444 !important; }
.text-success { color:#16a34a !important; }

/* callout 高亮块样式 */
.callout {
  border-left: 4px solid #3b82f6;
  background: #eff6ff;
  padding: 12px 16px;
  margin: 16px 0;
  border-radius: 6px;
}
.callout strong { color:#0f172a; }
.callout.info { border-color:#3b82f6; background:#eff6ff; }
.callout.warn { border-color:#f59e0b; background:#fffbeb; }
.callout.ok   { border-color:#10b981; background:#ecfdf5; }
.callout.err  { border-color:#ef4444; background:#fef2f2; }