代码如下：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
*{
margin: 0;
padding: 0;
}
body{
display: flex;
justify-content: center;
align-items: center;
height: 100vh;
background: #0074d0;
}
.loader{
position: relative;
width: 200px;
height: 200px;
border-radius: 50%;
box-shadow: 0 0 0 15px #080b1d;
}
.loader::before{
content: '';
position: absolute;
top: 0;
left: 0;
right: 0;
bottom: 0;
background: linear-gradient(45deg, #0b0f25 30%, #2196f3);
border-radius: 50%;
animation: animate 1s linear infinite;
}
.loader::after{
content: '';
position: absolute;
top: 8px;
left: 8px;
right: 8px;
bottom: 8px;
background: #0b0f25;
border-radius: 50%;
box-shadow: inset 0 0 0 5px #080b1d;
}
@keyframes animate {
0%{
transform: rotate(0deg);
}
100%{
transform: rotate(360deg);
}
}
</style>
</head>
<body>
<div class="loader"></div>
</body>
</html>
效果：
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