Hi @quadinfotech
Please check this screenshot I captured from Firefox:
As you can see the first icon is loading fine, however the others not. The reason behind this issue is that you have entered the correct CSS code needed for the first icon in the correct place in (Theme Options > CSS):
.genealogy:before{margin-left:30px;padding-top:10px;content:url(http://quadinfotech.com/wp-content/uploads/2018/08/GENEALOGY.png);width:70px;}
First, you gave a custom class name for the li, then added the correct code mentioned above, simply you need to do that with all other icons, because what you have done on the other icons isn’t correct, I mean adding just the CSS code to the li, without targeting the pseudo element :before isn’t correct.
Thanks.