Using a sticky side bar for sections with CMS

I’m trying to recreate Typeform’s guide setup: Lead generation marketing strategies - Typeform blog

Essentially, I want my marketing manager to be able to write her own blog posts/guides using CMS, where it’s possible to anchor different parts of the posts to a sticky sidebar. I know how to do it in a static page, but what would my setup in the Webflow CMS be for this to be recreated?