.layout>ul,.layout li{
    list-style: none;
    padding: 0;
    margin:0;
}


.layout>.ct{
    width: 600px;
    /* margin: 0 auto; */
    margin:  0 auto;
}
.ct li {
    float: left;
    margin: 10px;
}
.ct>li img{
    width: 240px;
    height: 180px;

}

.clearfix:after{
    content: '';
    display: block;
    clear: both;
}