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按钮阴影动画效果

<!doctype html>
<html>
<head>
    <meta charset="utf-8">
    <title>按钮阴影动画效果</title>
    <style type="text/css">
        button {
            position: relative;
            display: block;
            margin: 100px auto;
            padding: 10px;
            width: 100px;
            height: auto;
            border: none;
            border-radius: 5px;
            background: #07c160;
            color: #fff;
            text-align: center;
            text-decoration: none;
            font-size: 18px;
            cursor: pointer;
        }
        button:hover {
            -webkit-box-shadow: 0 0 10px #666;
            box-shadow: 0 0 10px #666;
            -webkit-transition: .5s;
            transition: .5s;
        }
        button:hover:after {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            border-radius: 5px;
            background: hsla(0,0%,100%,.1);
            content: "";
        }
    </style>
</head>
<body>
<button type="button">按钮</button>
</body>
</html>