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<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>3-1作业</title>
    <style>
        div {
            font-size: 14px;
            font-weight: bold;
            line-height: 50px;
            position: fixed;
            top: 0;
            right: 0;
            bottom: 0;
            left: 0;
            width: 200px;
            height: 50px;
            margin: auto;
            cursor: pointer;
            text-align: center;
            background: #abcdef;
            /*此处写代码*/
            -webkit-transform:rotate(0deg) scale(1,1);
            -webkit-transition:transform 1s ease-in-out 0.01s;
        }
        /*此处写代码*/
       div:hover {
            cursor:pointer;
            -webkit-transform:rotate(360deg) scale(2,2); 
            -webkit-transition:transform 1s ease-in-out 0.01s;
       }
    </style>
</head>
<body>
    <div>www.imooc.com</div>
</body>
</html>

RahodJoe 2019-09-24

源自：CSS3过渡 3-2 编程练习