Mobile issues with .one_third columns

My .one_third_column’s on a mobile device (667px width for example, or an Iphone 6), seem to step to the right of the screen with each column. I didn’t have this problem before I started messing around with padding, in order to get the columns to spread out evenly on a desktop screen. Here’s a link to a page that has this problem:

http://testsite.fanemb.com/services/

If you view it on a mobile device, you’ll see the problem.

https://ww.wp.xz.cn/plugins/column-shortcodes/