How to add large existed CSS

Hello everyone!
Currently i’m trying to move my another blog to Webflow project, next step is about the design which is adding embed custom code - CSS in Webflow.
However, our CSS file is too large (over 10,000 characters) comparing to Webflow embed code function.

Can anyone help me instruct how to add or link CSS file in Webflow? (video instruction as an example would be easier for me to understand since I’m not IT based)
Please help me…
Thank you so much!!!

I answered your post in (last one by me) Custom Code cannot exceed 10000 characters - Need help - Stuck