.about div:nth-child(1) {
//...
}
.about div:nth-child(2) {
//...
}
.about div:nth-child(3) {
//...
}
.about div:nth-child(4) {
//...
}
div{
position:relative;
width:42px;
height:42px;
}
div::after{
content: "";
display: block;
width: 30px;
height: 4px;
background: red;
transform: rotate(-45deg);
border-radius: 4px;
position:absolute;
left:0px;
bottom:0px;
}
div::before{
content: "";
display: block;
width: 20px;
height: 4px;
background: red;
transform: rotate(45deg);
border-radius: 4px;
position:absolute;
left:-10px;
bottom:-4px
}