#pubu {
margin: 0 auto;
position: relative;
}
#pubu .box {
width: 280px;
height: auto;
padding: 10px;
float: left;
}
#pubu .box .pic {
width: 280px;
height: auto;
box-shadow: 1px 1px 4px #ddd, -1px -1px 4px #ddd;
border-radius: 4px;
}
#pubu .box .pic img {
display: block;
width: 250px;
margin: 0 auto;
padding: 15px 0;
cursor: pointer;
}