CSS 04 盒子阴影效果box-shadow

<div class="ceng  rotate_left">
    <img src='yjx.jpg' alt=''>
    <p>
        上海鲜花港的郁金香，花名未闻
    </p>
</div>
<div class="ceng rotate_right">
    <img src='zgg.png' alt=''>
    <p>
        2010年世博会，中国馆
    </p>
</div>

body{
    background-color:#e9e9e9
}
.ceng{
    width:294px;
    padding:10px 10px 20px 10px;
    border:1px solid #BFBFBF;
    background-color:white;
    box-shadow: 2px 2px 20px #aaa;
}
.rotate_left{
    flat:left;
    transform:rote(7deg)
}
.rotate_right{
    flat:left;
    transform:rote(-8deg)
}