.sp{
	width:650px;
    margin:0 auto;
    margin-bottom:20px;
    height:174px;
}
.sp ul{
	width:100%;
    overflow:hidden;
}
.sp ul li{
	width:305px;
    border-radius:10px;
    position:relative;
    float:left;
    padding:0px;
}
.sp ul li img{
    margin:0 auto;
    width:305px;
    height:174px;
}
/*手机版*/
@media screen and (max-width: 640px){
	.sp{width:100%;}
	.sp ul li{width:47%;}
	.sp ul li img{width:100%;}
}