Responsive banner bottom padding on mobile

This is a regression, putting in a bottom padding for fluid 250 on mobile only.

Before;

![screen shot 2014-12-18 at 11 59 08](https://cloud.githubusercontent.com/assets/1303616/5487832/287e891e-86ae-11e4-98c0-414f815e5809.png)

After;
![screen shot 2014-12-18 at 12 03 26](https://cloud.githubusercontent.com/assets/1303616/5487839/384c91d8-86ae-11e4-95b8-ff5a3a2f6a34.png)