<style type="text/css">

.appstorebutton {height: 80px;width: 80px;margin: 30px;position: relative;overflow: hidden;float: left;-webkit-border-radius: 40px;-moz-border-radius: 40px;border-radius: 40px;-webkit-transition: width 1s ease;-moz-transition: width 1s ease;-o-transition: width 1s ease;-ms-transition: width 1s ease;transition: width 1s ease;

}

.appstorebutton:hover {width: 260px;}

.appstorebutton a {color: white;text-decoration: none;}

.appstorebutton p {width: 200px;font: 30px/1 Helvetica, Arial, sens-serif;text-align: center;color: white;margin: 17px 0px 10px 60px;   }

.appstorebutton p small {font-size: 15px;}

.iphone {background: #105CB6;}

.iphone p:before {content: "O";position: absolute;font: 70px/1 'ModernPictogramsNormal', Helvetica, sans-serif;top: 8px;left: 13px;}

</style>

<div class="appstorebutton iphone">

<p><a href="#"><small>可选一个资源供下载</small><br />Download</a></p>

</div>