用纯css画一个单选勾号（代码如下）
<style>
.checked {
margin-top: 200px;
margin-left: 200px;
background: red;
width: 160px;
height: 160px;
border-radius: 50%;
position: relative;
}
.checked::after {
content: "";
background-color: white;
width: 50px;
height: 8px;
position: absolute;
top: 100px;
left: 32px;
transform: rotate(30deg);
border-radius: 8px;
}
.checked::before {
content: "";
background-color: white;
width: 90px;
height: 8px;
position: absolute;
top: 76px;
left: 60px;
transform: rotate(-50deg);
border-radius: 8px;
}
</style>
<div class="checked"></div>
显示效果如下图
WX20210612-165357.png
