congpine Because when I change to xhtml in advance tab, it's show, but all css in my custom.css not load. so I have to use another module.
As per your post being quoted above, You may assign the specific module to similar position with xhtml or some other module style selected and kindly provide us direct site link where specific module has been published in order to take closer look
Also, To be precise, Kindly share the screenshot of code snippet in custom.css file which you wish to refer to . Alongwith, Do you have module class suffix entered for specific module ?