.product_class1 {
	background-image: url(../images/zhong1_qiehuan1.gif);
	background-repeat: no-repeat;
	background-position: center bottom;
	height: 30px;
	width: 197px;
	float: left;
}
.product_class2 {
	background-image: url(../images/zhong1_qiehuan2.gif);
	background-repeat: no-repeat;
	background-position: center bottom;
	height: 30px;
	width: 190px;
	float: left;
}

.product_class3 {
	background-image: url(../images/zhong1_qiehuan3.gif);
	background-repeat: no-repeat;
	background-position: center bottom;
	height: 30px;
	width: 193px;
	float: left;
}
.product1_class1 {
	background-image: url(../images/zhong1_qiehuan4.gif);
	background-repeat: no-repeat;
	background-position: center bottom;
	height: 30px;
	width: 100%;
	float: left;
}
.product1_class2 {
	background-image: url(../images/zhong1_qiehuan5.gif);
	background-repeat: no-repeat;
	background-position: center bottom;
	height: 30px;
	width: 245px;
	float: left;
}
.product1_class3 {
	background-image: url(../images/zhong1_qiehuan6.gif);
	background-repeat: no-repeat;
	background-position: center bottom;
	height: 30px;
	width: 245px;
	float: left;
}