Iconlist Problem

Hi,
I’ve a problem with the iconlist element. It shows green lines instead of green icons as you can see here:

I’m actually using a child theme and the only changes that i’ve done to the iconlist element are:

1 – Header are h3 instead of h4
2 – CSS for mobile:

@media only screen and (max-width:767px) {
  #top .avia-icon-list .iconlist_icon {
    height: 40px;
    width: 40px;
    line-height: 40px;
    font-size: 20px;
  }

Its not the first time i had this kind of problem but i cant understand the reason.

Thanks for your help