I have already checked the screenshot and documentation.
I think still you did not understand my query.
In short, please provide the font details you used in the demo. So, I can set the same on my website too.
As per your screenshot, you are mentioning to do manually for every sections. how this possible to change manually the font for every pages and sections.
So, that I asked you the details to set the font and style for the entire website content from a single place.