/* 中文排版优化 */
:root {
  --content-max-width: 900px;
}

.content main {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.8;
}

/* 代码块优化 */
code {
  font-family: "JetBrains Mono", "Fira Code", "SF Mono", Menlo, monospace;
  font-size: 0.875em;
}

pre > code {
  font-size: 0.85em;
}

/* 表格优化 */
table {
  display: table;
  width: 100%;
  font-size: 0.9em;
}

table th {
  white-space: nowrap;
}

/* 标题间距 */
h2 {
  margin-top: 2em;
  padding-top: 0.5em;
  border-top: 1px solid var(--table-border-color);
}

h3 {
  margin-top: 1.5em;
}

/* Mermaid pan-zoom 按钮 */
.pz-btn {
  width: 32px;
  height: 32px;
  border: 1px solid rgba(128,128,128,0.4);
  border-radius: 6px;
  background: var(--bg, #1a1a2e);
  color: var(--fg, #ccc);
  font-size: 16px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0.7;
  transition: opacity 0.2s;
}

.pz-btn:hover {
  opacity: 1;
  background: rgba(128,128,128,0.2);
}