How to create uneven CMS grids?

Hi fellow Webflowers!

I’m curious how to create uneven grids that work with CMS similar to this site → Plasticbionic | Art Direction, Graphic Design & Illustration

I guess it’s possible to do with nth-child, but not exactly sure how it will work in the case of that site. In addition, I’ve made simplier uneven CMS grids in Webflow and not all nth-child code works with CMS for some reason. The one that worked for me was “area” property.

Thanks for your replies in advance!