How to make a collection page mobile responsive

I want to make a particular page mobile responsive which is a collection page how can I do it.

Simple answer - Use break points to tailor your layout for different screen sizes. How? There are many hours of video instruction in the Webflow University and related documentation. Start there.

for cms (collection page) particular page can you suggest any video or guide

You could dive in here → Full site build | Webflow University

There is no shortcut to knowledge. Webflow is a sophisticated tool and you can easily invest a month just learning fundamentals.