.annual_st_list{
	width: 100%;
	margin-bottom: 20px;
}
.annual_st_list li{
	width: 284px;
	margin-right: 20px;
	float: left;
}
.annual_st_list li:last-child{
	margin-right: 0px;
}
.annual-each-item{
	width: 1200px;
    margin: 0 auto;
}
.a-img{height: 284px;width: 284px;}