Parallax image on mobile Safari

Hi dear, on my website: www.residencealparadiso.it I use QBar template, but on Safari Browser, in Iphone and Ipad, Parallax images result zoomed too.
How I can solve this issue?

Regards

Please add this code to your css/custom.css

@media screen and (max-width: 768px) {
#top-a, #top-b, #top-c, #top-d, #bottom-a, #bottom-b, #bottom-c, #bottom-d {background-attachment:scroll !important}
}