IE Problem

When attempting to implement browser compatibility, first validate your website’s pages.
This page gives explanations to all errors generated by the W3C generator.

I think that is the problem of css

I disagree. That’s your markup, i.e the HTML generated by PHP or statically within your template.

Thank you for your response. I want to hear other people’s ideas

Sorry, but with 53 mark-up errors on that one page — yes, that’s certainly the place you need to start:

https://validator.w3.org/check?uri=http%3A%2F%2Fkafe14.izmok.com%2Fonline-siparis%2F&charset=%28detect+automatically%29&doctype=Inline&group=0

You are also using a Commercial theme — and those are not supported on these forums, so you’ll need to go to the vendor for assistance.