How do I get 2 columns to show in landscape mode on iPads?

I am using Divi. I would like to make it two columns on iPads in both Portrait and Landscape mode. In Portrait it works fine with the tweaked done with some CSS. However, in Landscape Divi is using different HTML markup and different classes and we can't change classes and/or change HTML markup structure with CSS only. How do we make it show two columns on iPads in landscape mode too?