[Theme Duotive Fortune] Mobile version background problem

Hi,

i have this site: https://website.padelfemme.es/ with the background shows ok in computer and tablet version

background-image: url(https://website.padelfemme.es/wp-content/uploads/2014/12/IMG_1432.jpg);
background-position: left top;
background-repeat: repeat;

The problem begins in mobile (iphone 6 plus or another ios and any android browser) the background takes a no-repeat property that i don’t know how to change, because i have search in the database, template, page, custom css and theme settings

element.style {
width: 980px;
height: 2411px;
background: url(https://website.padelfemme.es/wp-content/uploads/2014/12/IMG_1432.jpg) 0% 0% no-repeat fixed;

please, any help would be appreciate!
regards