Responive home page issue

[liamjoint]

Hi, can anyone please help with this...
I make a new cms page and when I view it online it automatically resizes - www.separator.xyz/home BUT...
When I set it as my home page it does not automatically resize and I can only see the top left corner of the image... Which is black - www.separator.com
Any ideas why this happens and how to fix it?!

[Gary Globals]

It needs to be sorted with css and theme.

Please check the same with the help of web developer tools of the browser and you will be able to fix the issues