.nav {
	margin: 0px auto; width: 1200px; height: 70px; position: relative;
}
.nav a {
	top: 30px; width: 57px; height: 34px; right: 50%; text-indent: -999em; overflow: hidden; display: block; position: absolute;
}
a.nav1 {
	background: url("../images/common-nav1-normal.png") no-repeat 0px 0px; margin-right: -480px;
}
a.nav1:hover {
	background: url("../images/common-nav1-hover.png") no-repeat 0px 0px;
}
a.nav2 {
	background: url("../images/common-nav2-normal.png") no-repeat 0px 0px; margin-right: -540px;
}
a.nav2:hover {
	background: url("../images/common-nav2-hover.png") no-repeat 0px 0px;
}
a.nav3 {
	background: url("../images/common-nav3-normal.png") no-repeat 0px 0px; margin-right: -600px;
}
a.nav3:hover {
	background: url("../images/common-nav3-hover.png") no-repeat 0px 0px;
}
.common-title {
	height: 50px; color: rgb(51, 51, 51); line-height: 50px; font-size: 20px; font-weight: 700;
}
.footer {
	margin: 20px auto 0px; width: 700px; height: 80px; color: rgb(85, 85, 85); line-height: 80px;
}