enfold theme – background image for only home page at main content bottom center

hi sir,
Please help me to tell how can I use background image for only home page at main content bottom center position in Enfold Theme. I tried to do that from theme option -> general styling -> Main content -> Background Image.
and set the image position to bottom center, no- repeat, scroll. and save its.
But when i check it on my live site http://www.digibuzzin.com/ image size will be width 1500px and height 488px.
I found this background image on all page, but i want to apply it at only home page.
what may i do to set the background image at only home page.
Please help to apply this…….