In grids overkill: hidden.
Now such css code on default and breakpoints:
Code: Select all
#indexLayoutGrid1 > .row > .col-1 {
background-image: url(../images/foto1.jpg);
default
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#indexLayoutGrid1 > .row > .col-1 {
background-image: url(../images/foto1.jpg);}
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@media (max-width: 480px){
#indexLayoutGrid1 > .row > .col-1 {
background-image: url(../images/foto2.jpg);}
}