CSS Media Queries

Hi guys I have been looking for some help for a few days now and come across this forum.

I have been working on a website from a template I got off line.
The template was fully mobile browser responsive when I got it but I have added some new pages to it and now need help. Can anyone help me redo some of the CSS so that it will still work with a mobile browser?

I don't know a lot about CSS just the basic so any help would be greatly appreciated. I can add a link to the site or send PM if that's not allowed

Thank you Jim

Yes, please give us a link or post your code (in between tags, e. g. by using the ‘#’ button above the reply field). No code, no help.

Yes, please give us a link or post your code (in between tags, e. g. by using the ‘#’ button above the reply field). No code, no help.

The lik is ( http://jkwebsolution.co.uk )

Thank you