Hello Karim

Media queries should be included in curly brackets, like this:

@media only screen and (min-width: 360px) and (max-width: 1200px) {
    .wpdt-c img {
        height: auto !important;    }
}

So, in your case, you can try with this:

@media only screen and (min-width: 1200px) {
.el-col-lg-6 { width: 25% !important;}
}

It's not 100% that this will work as expected, so you may need to play around with the coe.

2. If I understood you correctly, you wish to show 3 categories, all with service 1? How did you even do that? Service ID is unique, and can't be moved across categories like that.

You can use [ameliacatalog category=1 service=1]; [ameliacatalog category=2 service=2], etc.