aside{width: 37%; float:left; padding-right:50px;}
article {
    width: 63%; float:left;
}
.shutu { overflow:hidden; margin:0 -15px}
.shutu img{width:33.33%; padding: 0 15px; float:left;    box-sizing: border-box;}
.hengtu{width:100%; padding:0 15px; box-sizing: border-box; padding-bottom:30px; }
.hengtu img{width:100%}
@media screen and (max-width: 768px) {
    aside{width: 100%; float:inherit; padding-right:0px;}
    article {
        width: 100%; float:inherit;
    }
    .shutu{margin:0}
    .shutu img{width:100%}
}