添加下方代码到style.css 文件里即可

/**代码高亮**/
.entry-content pre:before {
content: '';
position: absolute;
top: 0;
left: 25px;
width: 15px;
height: 15px;
border-radius: 50%;
margin: 15px 25px;
background: #fdbc40;
}
ol.linenums:after {
content: '';
position: absolute;
top: 0;
left: 50px;
width: 15px;
height: 15px;
border-radius: 50%;
margin: 15px 25px;
background: #35cd4b;
}.entry-content pre:after {
content: '';
position: absolute;
top: 0;
left: 0;
width: 15px;
height: 15px;
border-radius: 50%;
background: #fc625d;
margin: 15px 25px;
}.entry-content pre {
position: relative;
border-radius: 6px;
/**background: #21252b;**/
padding-top: 50px;
box-shadow: 0px 8px 20px -10px #000;
}.entry-content pre .copy {
position: absolute;
top: 0;
right: 0;
margin: 10px 20px;
cursor: pointer;
color: #f0f0f0;
}
/**代码高亮**/