Need help on a website...sure WPMUDEV can rescue me :)

I need some assistance as I am not sure what's going on with my website. For some odd reason my call to action buttons are being cut off on different devices (desktop vs laptop vs mobile devices). Particularly, the following things are happening:

1. On mobile devices the logo covers the image which means I can't see the text and/or the call to action buttons for donations.

2. On certain desktop and laptops the call to action buttons for donations are cut off.

Can you help me out?