.htaccess 将整个文件夹重定向到根目录

我到处找了，找不到解决办法

我想将几个文件夹（及其所有内容，包括子文件夹）重定向到网站的根目录

应该发生什么的示例：

http://www.domain.com/folder/ -> http://www.domain.com/
http://www.domain.com/folder/subfolder/ -> http://www.domain.com/

http://www.domain.com/folder/ -> http://www.domain.com/ (works!)
http://www.domain.com/folder/subfolder/ -> http://www.domain.com/subfolder/ (doesn't work!)

现在发生的事情的示例：

http://www.domain.com/folder/ -> http://www.domain.com/
http://www.domain.com/folder/subfolder/ -> http://www.domain.com/

http://www.domain.com/folder/ -> http://www.domain.com/ (works!)
http://www.domain.com/folder/subfolder/ -> http://www.domain.com/subfolder/ (doesn't work!)

怎么了

RewriteEngine On
RewriteRule ^folder/(.*)$ http://www.domain.com/ [R=301,NC,L]