Logo cannot show on mobile and Ipad

you have a rule in your css not to show logo in screens below 800px

.fusion-mobile-logo-1 .fusion-standard-logo, #side-header .fusion-mobile-logo-1 .fusion-standard-logo {
display: none;

ok thanks!
so now how can I disable this exactly?

I went here: what do I have to do? delete block?

}
.fusion-logo {
float: left;
zoom: 1;
}
.fusion-logo:before,
.fusion-logo:after {
content: ” “;
display: table;
}
.fusion-logo:after {
clear: both;
}
.fusion-logo a {
display: block;
}
.fusion-logo-2x {
display: none;
}
.fusion-mobile-logo-1x,
.fusion-mobile-logo-2x {
display: none;
}
@media only screen and (-webkit-min-device-pixel-ratio: 1.5), only screen and (min-resolution: 144dpi), only screen and (min-resolution: 1.5dppx) {
.fusion-standard-logo.fusion-logo-1x {
display: none;
}
.fusion-standard-logo.fusion-logo-2x {
display: block;
}

I cannot answer

you have taken away the css it was a

@media call for 800px wide and wnen I removed the rule for display:none in web developer it showed it.

Why have you taken away the css for a live site?