PHP-processed files cannot load styles?

First:

According to my expectations, access to/page.html should be no problem, the results in Google and Firefox browser CSS is not loaded, but in the ie11 is normal, in addition, accidentally found that in page.html head casually inserted a visible character, the style is loaded correctly, ask the question in the end where? Thanks a lot!

Reply content:

First:

According to my expectations, access to/page.html should be no problem, the results in Google and Firefox browser CSS is not loaded, but in the ie11 is normal, in addition, accidentally found that in page.html head casually inserted a visible character, the style is loaded correctly, ask the question in the end where? Thanks a lot!

