主要是分左右2部分，先将left设置成左半圆，right设置成右半圆，其中左右宽高一致，宽是高的一半，
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Document</title>
<style type="text/css">
.container {
display: flex;
}
.left {
width: 100px;
height: 200px;
position: relative;
overflow: hidden;
}
.leftcircle {
width: 160px;
height: 160px;
border: 20px solid rgb(255 255 255);
position: absolute;
border-radius: 50%;
left: 0px;
top: 0px;
border-bottom: 20px solid rgb(255, 182, 193, 1);
border-left: 20px solid rgb(255, 182, 193, 1);
transform: rotate(45deg);
animation-name: circle_left;
animation-duration: 20s;
animation-timing-function: linear;
animation-iteration-count: infinite;
}
.right {
width: 100px;
height: 200px;
position: relative;
overflow: hidden;
}
.rightcircle {
width: 160px;
height: 160px;
border-radius: 50%;
border: 20px solid rgb(255 255 255);
position: absolute;
border-top: 20px solid rgb(255, 182, 193, 1);
border-right: 20px solid rgb(255, 182, 193, 1);
right: 0px;
top: 0px;
animation-name: circle_right;
animation-duration: 20s;
animation-timing-function: linear;
animation-iteration-count: infinite;
transform: rotate(-135deg);
}
@keyframes circle_right {
0% {
transform: rotate(-135deg);
}
50%,
100% {
transform: rotate(45deg);
}
}
@keyframes circle_left {
0%,
50% {
transform: rotate(-135deg);
}
100% {
transform: rotate(45deg);
}
}
</style>
</head>
<body>
<!-- <div class="demo"></div> -->
<!-- <img
src="./Group 1708test.svg"
style="width: 195px; position: absolute; padding: 3px"
/> -->
<div class="container">
<div class="left">
<div class="leftcircle"></div>
</div>
<div class="right">
<div class="rightcircle"></div>
</div>
</div>
</body>
</html>
