Why the site does not work on a mobile phone, but everything is fine on a PC?

Question

css

In short, I uploaded the site to the hosting, after that I fixed it on my local computer, and uploaded it again. And I found that the styles on the mobile phone remained the same, but everything works fine on the PC. Maybe the problem is cross-browser compatibility, I checked it through Safari on a mobile phone, on a PC through Mozilla.
Or maybe there are some files left on the hosting?
Tell me what could be the problem?

Answer 1

And I found that the styles on the mobile phone remained the same

That's right, the styles are saved in the cache. I usually go to the phone browser through a direct link to the styles, refresh and return to the site

Answer 2

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