Help: How to generate offline static HTML files without server?

[yangxuan21]

How to generate offline static HTML files without server?
I use hugo command , then generate public folder,but the css file cannot be displayed normally.

D:\docsy-example>hugo
Start building sites …
hugo v0.109.0-47b12b83e636224e5e601813ff3e6790c191e371+extended windows/amd64 BuildDate=2022-12-23T10:38:11Z VendorInfo=gohugoio
Error: Error building site: POSTCSS: failed to transform "scss/main.css" (text/css): Error: Loading PostCSS Plugin failed: Cannot find module 'autoprefixer'
Require stack:
- C:\Users\MECH-M~1\AppData\Local\Temp\hugo_cache\modules\filecache\modules\pkg\mod\github.com\google\docsy@v0.5.1\postcss.config.js

(@C:\Users\MECH-M~1\AppData\Local\Temp\hugo_cache\modules\filecache\modules\pkg\mod\github.com\google\docsy@v0.5.1\postcss.config.js)
    at load (D:\docsy-example\node_modules\postcss-load-config\src\plugins.js:28:11)
    at D:\docsy-example\node_modules\postcss-load-config\src\plugins.js:53:16
    at Array.map (<anonymous>)
    at plugins (D:\docsy-example\node_modules\postcss-load-config\src\plugins.js:52:8)
    at processResult (D:\docsy-example\node_modules\postcss-load-config\src\index.js:37:14)
    at D:\docsy-example\node_modules\postcss-load-config\src\index.js:151:14
    at async Promise.all (index 0)
Total in 2881 ms