最近写markdown比较爱用footnote[1]，点击后可在网页中使用跳转。
MD
Here's a simple footnote,[^1] and here's a longer one.[^bignote][^1]: This is the first footnote.[^bignote]: Here's one with multiple paragraphs and code. Indent paragraphs to include them in the footnote. `{ my code }` Add as many paragraphs as you like.但默认行为并不友好。跳转后内容经常被博客顶部的固定导航栏遮挡住，无法看到跳转后的内容。本文记录优化方案
