1import type { RemarkPlugin } from '@astrojs/markdown-remark';
 2import { visit } from 'unist-util-visit';
 3
 4export const remarkHeadingShift: RemarkPlugin = function () {
 5  return (tree) => {
 6    visit(tree, 'heading', (node) => {
 7      // 将所有标题层级加1（最大到6）
 8      node.depth = Math.min(node.depth + 1, 6) as 1 | 2 | 3 | 4 | 5 | 6;
 9    });
10  };
11};