前言：简单实现水波进度样式，简单好看。
效果图：
代码实现：
<!DOCTYPE html>
<html lang="en"><head><meta charset="utf-8" /><meta http-equiv="X-UA-Compatible" content="IE=edge" /><metaname="viewport"content="initial-scale=1.0, user-scalable=no, width=device-width"/><title>document</title><style>body {background: #000;}.indicator {display: flex;align-items: center;justify-content: center;font-size: 3em;margin: 200px auto;width: 100px;height: 100px;border-radius: 50%;border: 2px solid #fff;position: relative;overflow: hidden;color: #fff;}.indicator span {position: absolute;z-index: 999;}.indicator::after {content: "";width: 200px;height: 200px;border-radius: 60px;position: absolute;left: -50%;top: 50px;background: blue;animation: rotate 5s linear 0s infinite;}@keyframes rotate {from {transform: rotateZ(0deg);}to {transform: rotateZ(359deg);}}</style></head><body><div><div class="indicator"><span>50</span></div></div><script></script></body>
</html>
