为什么我的引导程序clearfix在我的Rails集合中破坏了？

I am a student working on my final project. Below you will see two screen-shots of my application. The first is the normal desktop view, where everything is rendered correctly. As you begin to resize the view-port smaller, the position of items becomes uneven as you can see in the second screen shot.I am a student working on my final project. Bel