How do you edit responsive layout? Using Palos theme, need to change order of how objects appear.

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We are using the Palos theme for a shopify store and the desktop layout looks amazing, but when we switch to mobile the order of how objects show up on the page is terrible.  We need to reorganize sections within product-collection-banners to render differently on mobile.  The layout should be H3 title, collection image, products, space, next banner collection.  We have 3 collections we are trying to show (as seen on the desktop version).

The shop isn't live yet. but can be viewed at this URL -

Here are a few screenshots to hopefully show what I'm trying to explain. Any help would be greatly appreciated.

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