I am not a proponent of Auntie Xara knows best and I raised these issues when Variants appeared.

While you are testing, you can readily resize a PC browser window and get the manifestations.
I have suggested two breakpoints between Variants transitioning up and down and user-selectable.

As nothing became of it, I returned to separate websites with my own JavaScript to do the switching.
This is also more successful as the the payload of four Variants is not sitting in one page file and I can add or delete pages that I chose.

However, I rarely do this as most devices have a fixed viewport so incremental changes are a rare happening.

Four Variants is overkill. If I was that concerned, I might build the Main site in Xara and deliver the other content with an adaptive approach like WordPress or a lighweight CMS.

Acorn