.social-icons li.max a {
    position: relative;
    display: inline-block;
    padding-left: 10px;
    background: none !important;
}

.social-icons li.max a:before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    width: 40px;
    height: 40px;
    transform: translateY(-50%);
    background-image: url('/upload/max-icon.png');
    background-repeat: no-repeat;
    background-position: center;
    background-size: 40px 40px;
}