.qianfang{
	max-width: 640px;
	min-width: 280px;
	margin-top: 30px;
	/* margin-bottom:200px; */
}
.qianfang img{
	width:30%;
	max-width: 395px;
}
img.yijushi{
	margin-left:3%;
}
.mzsm{
	margin-top:15px;
	text-align:center;
	font-size: 0.3em;
	font-family: "宋体"，"微软雅黑";
	color:red;
	font-weight: bold;
}