.center .top {
	position: fixed;
	top: 83px;
	right: 20px;
	left: 250px;
	padding-left: 30px;
	padding-top: 20px;
	z-index: 3;
	background: #fff;
}
.intro {
	margin: 20px 0 20px 0;
}
.teacher-list {
	margin-top: 120px;
}
.index {
	z-index: 4;
}
@media screen and (max-width:1360px) {
	.center .top {
		position: fixed;
		top: 83px;
		right: 0px;
		left: 270px;
	}
}
@media screen and (max-width:1024px) {
	.teacher-list {
		margin-top: 0px;
	}
	.teacher-container .left {
		position: fixed;
		top: 83px;
		z-index: 3;
		background: #fff;
	}
}
@media screen and (max-width:730px) {
	.teacher-list {
		margin-top: 0px;
	}
	.teacher-container .left {
		position: fixed;
		top: 60px;
		z-index: 3;
		background: #fff;
	}
}