*{
	font-family: "微软雅黑";
	font-size: 14px;
	margin: 0;
	padding: 0;
}

a{
	text-decoration: none;
	color: #222222;	
}

.toolBar{
	background-color: #3E3D3D;
}

.main{
	width: 1200px;
	height: auto;
	margin: 0 auto;
}

.main_nav{
	height: 80px;
}
.main_img{
	display: block;
	margin: 0 auto;
}

.main_advantage{
	height: 490px;
}

.content1{
	width: 100%;
	background-color:#e6e6e6 ;
}

.main_teach{
	height: 1269px;
	background-color:#e6e6e6 ;
}

.main_free{
	height: 743px;
}
.content3{
	width: 100%;
	background-color: #282828;
}

.footer{
	width: 1200px;
	height: 80px;
	margin: auto;
}

.banner{
	width: 100%;
	height: auto;
}

.banner img{
	width: 100%;
	height: auto;
}

.content4{
	width: 100%;
	background-color: #E6E6E6;
}

.main_basis{
	height: 590px;
}

.main_course{
	height: 620px;
}

.main_users{
	height: 680px;
}

.main_teacher{
	height: 540px;
}