.main_1{
	width: 100%;
	/*height: 736px;*/
	/*background: url(../img/bg.jpg) no-repeat;*/
	background-size:100% 100%;
	text-align: center;
}
.lan_jing{
	height: 400px;
	line-height: 300px;
	font-size: 2.2rem;
	color: #fff;
	margin-bottom: 5rem;
}
.design{
	height: 24px;
	line-height: 24px;
	color: #fff;
	font-size: 1rem;
}
.closed{
	width: 20%;
	height: 30px;
	position: fixed;
	left: 40%;
	bottom: 7%;
}
.kai{
	display: block;
	width: 36px;
	height: 3px;
	border-radius: 1.5px;
	background: rgb(112,86,91);
	margin: 7px 5px;
}