主要利用css3特性，以及伪元素的使用实现此功能。
<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>
* {
padding: 0;
margin: 0;
}
.container {
display: flex;
justify-content: center;
align-items: center;
width: 100%;
min-height: 100vh;
background-color: #001d30;
position: relative;
animation: color 3s infinite linear;
}
.loading {
position: absolute;
width: 150px;
height: 150px;
background: linear-gradient(to top, #001d30 40%, #51eeee);
border-radius: 50%;
animation: rotate 3s infinite linear;
}
@keyframes color {
to {
filter: hue-rotate(360deg);
}
}
@keyframes rotate {
to {
transform: rotate(360deg);
}
}
.loading::before {
content: "";
position: absolute;
background-color: #001d30;
width: 90%;
height: 100%;
top: 20px;
right: 20px;
left: 0;
bottom: 0;
border-radius: 50%;
}
.loading::after {
content: "";
position: absolute;
width: 40px;
height: 40px;
border-radius: 50%;
background-color: #51eeee;
top: 50%;
transform: translateY(-50%);
right: -8px;
box-shadow: 0 0 25px #51eeee, 0 0 25px #51eeee, 0 0 50px #51eeee,
0 0 70px #51eeee;
}
</style>
</head>
<body>
<div class="container">
<div class="loading"></div>
</div>
</body>
</html>