代码：
<!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>
.map {
position: relative;
width: 640px;
height: 367px;
background: url(media/map.webp) no-repeat;
margin: 0 auto;
}
.city {
top: 100px;
right: 100px;
}
.tb {
position: absolute;
top: 500px;
right: 80px;
color: #fff;
}
.dotted {
width: 8px;
height: 8px;
background color: #09f;
border-radius: 50%;
}
.city div[class^="pluse"] {
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%，-50%);
width: 8px;
height: 8px;
box-shadow: 0 0 12px #009dfd;
border-radius: 50%;
animation: pulse 1.2s linear infinite;
}
.city div.pulse2 {
animation-delay: 0.4s;
}
.city div.pulse3 {
animation-delay: 0.8s;
}
@keyframes pluse {
0% {}
70% {
width: 40px;
height: 40px;
opacity: 1;
}
100% {
width: 70px;
height: 70px;
opacity: 0;
}
}
</style>
</head>
<body>
<div class="map">
<div class="city"></div>
<div class="dotted"></div>
<div class="pulse1"></div>
<div class="pulse2"></div>
<div class="pulse3"></div>
</div>
<div class="city tb"></div>
<div class="dotted"></div>
<div class="pulse1"></div>
<div class="pulse2"></div>
<div class="pulse3"></div>
</div>
</body>
</html>
效果：
