css 圆形扩散特效 水波
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<style>
.q {
width: 300px;
height: 300px;
position: relative;
border: 1px solid red;
}
.a {
width: 100px;
height: 100px;
border: 1px solid #000;
background: #000;
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
border-radius: 50%;
animation: identifier 1s infinite;
opacity: 0;
}
.a2 {
animation-delay: 0.5s;
}
.btn {
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
background: #fff;
width: 50px;
height: 50px;
border-radius: 50%;
text-align: center;
line-height: 50px;
}
@keyframes identifier {
0% {
transform: translate(-50%, -50%) scale(0);
opacity: 0.8;
}
100% {
transform: translate(-50%, -50%) scale(1.8);
opacity: 0;
}
}
</style>
</head>
<body>
<div class="q">
<div class="a a1"></div>
<div class="a a2"></div>
<div class="btn"></div>
</div>
</body>
</html>
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