测试2

.wp-block-wpcom-hljs:after {
content: " ";
position: absolute;
-webkit-border-radius: 50%;
border-radius: 50%;
background: #fff;
width: 12px;
height: 12px;
top: 0;
left: 15px;
margin-top: 11px;
-webkit-box-shadow: 20px 0 #fff, 40px 0 #fff;
box-shadow: 20px 0 #fff, 40px 0 #fff;
transition-duration: .3s;
}
.wp-block-wpcom-hljs:hover:after {
background: #f92900;
-webkit-box-shadow: 20px 0 #fbc606, 40px 0 #448ef6;
box-shadow: 20px 0 #fbc606, 40px 0 #448ef6;
}
.wp-block-wpcom-hljs pre.hljs {
padding-top: 40px;
}