CSS behaves differently than on demo

I have installed the template on my server and everything is fine, beside one discrepancy: 3 boxes under the header slider have a large padding around and the all products under have no margin and are inside a white background.

I have tryed to play around with the classes of template.cc but with no success:

The two links for comparing the difference are here:

http://demo.gavick.com/joomla25/shop_and_buy/

http://www.dmsoftware.it/smm/it/

I have pretty much the same modules published so I have no idea what to do. thanks.

You are missing ".frontpage" suffix on body element.

ok, can you please tell me exactly what to do? thanks

Please follow this documentation:
https://www.gavick.com/documentation/ge ... mla-pages/