Cloudflare support suggests doing a few technical things I may be able to learn to do, but what stumps me the most is editing my origin server. I do not know how.
Webflow looks like fully-managed hosting–that is, you’re not doing server administration.
If they provide SSL by default, try Full Strict mode and see if it Just Works. If it doesn’t, something isn’t set up properly at the host’s end for SSL. What you want is, first, for it to work with SSL if you bypass Cloudflare completely. Once it does, enable Cloudflare in Full Strict mode.
Either way… pausing essentially un-proxies all your DNS records for the domain temporarily (but you’ll still see them as orange-clouded in the control panel)