how to make divi theme non-responsive

Hello, I using a divi theme now and it works great for me. But i have some issue and I cant find help from anywhere, I want to make divi a non-responsive on mobile or make it a static page on mobile. Would you please tell me how to do it. I do not know much about css, So please tell me a little bit like step by step. Thank you so much. I’ll appreciate for help me out. Truly sincerely.