.banner{
	background-image: url(img/产品中心banner.jpg);
    height: 600px;
    background-repeat: no-repeat;
    background-position: center;
    padding-top: 230px;
}
img{
	margin: 0 auto;
}
#part5{
	background: #F8F8F8;
}
#mydiv{
	width: 100%;
	height: 100%;
}
.row{
	margin-left: 0;
	margin-right: 0;
	margin-top: 40px;
}
.describe{
	padding: 0 40px;
}