.st1:after {
/*margin-left: 10px;*/
content: url('/assets/imgs/1st.png');
/*display: inline-block;*/
}
.st2:after {
margin-left: 10px;
content: url(/assets/imgs/2st.png);
display: inline-block;
}
.st3:after {
margin-left: 10px;
content: url(/assets/imgs/3st.png);
display: inline-block;
}
Find more questions by tags Google ChromeCSS