案例-热点图（CSS3）

<!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>案例-热点图</title>
    <style>
        body {
            background-color: #333;
        }

        .map {
            position: relative;
            width: 600px;
            height: 600px;
            background: url(map.png) no-repeat;
            margin: 0 auto;
        }

        .city {
            position: absolute;
            top: 120px;
            right: 291px;
            color: black;
            font-size: 14px;
        }

        .dotted {
            width: 8px;
            height: 8px;
            background-color: red;
            border-radius: 50%;
        }

        .city div[class^=pulse] {
            /* 保证我们小波纹在父盒子里面水平垂直居中  放大之后就会向四周发散  */
            position: absolute;
            top: 84%;
            right: 67%;
            transform: translate(-0%, -50%);
            width: 8px;
            height: 8px;
            box-shadow: 0 0 10px red;

            border-radius: 50%;
            animation: pulse 2s linear infinite;
        }

        .city div.pulse2 {
            animation-delay: 0.4s;
        }

        .city div.pulse3 {
            animation-delay: 0.8s;
        }

        @keyframes pulse {
            0% {}

            70% {
                /*  width: 40px; */
                /*  height: 40px; */
                transform: scale(5);
                opacity: 1;
            }

            100% {
                width: 70px;
                height: 70px;
                opacity: 0;
            }
        }
    </style>
</head>

<body>
    <div class="map">

        <div class="city">北京
            <div class="dotted">
            </div>
            <div class="pulse1"></div>
            <div class="pulse2"></div>
            <div class="pulse3"></div>
        </div>

    </div>
</body>

</html>
原文链接：https://blog.csdn.net/weixin_50569789/article/details/119752141