Squarespace Mobile Layout Fix

I built my site in Squarespace and, while it looks fine on desktop, the entire home page gets messy on phones—images spill past the viewport and some sections refuse to center. I’d like you to comb through the whole page, tweak the block settings or add a little custom CSS so that every image and section snaps neatly into place on mobile.
I constantly change and update my website so the CSS changes I would need to understand.

Please keep the current design intact; all I need is for headings, galleries, banners, and buttons to line up and scale correctly across common devices. Once you are done, send me a short rundown of what you adjusted so I can maintain it myself going forward. If you’ve solved similar Squarespace responsiveness issues before, I’m ready to get started right away.
I am also open to suggestions.
please make price offer.