the bottom part is hidden when main nav's dropdown is scroll to the bottom in home page

[huohuoren4]

Describe the bug

the bottom part is hidden when main nav's dropdown is scroll to the bottom in home page

Reproduction

1. open https://huohuoren4.github.io/ in the browser
2. scroll the main nav's dropdown to the bottom in home page

Expected behavior

the result is the same as here

System Info

System:
    OS: Windows 10 Professional Edition
  Binaries:
    Node: v18.17.1
    npm: 9.6.7
    pnpm: 8.6.7
  Browsers:
    Chrome: 116.0.5845.141
  npmPackages:
    vitepress: 1.0.0-rc.10

Additional context

No response

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