html body{
	margin: 0;
	background-color: #f3f6fa;

}
.about_us_center{
	height: 540px;
	display: flex;

}
.about_us_2_center{
	height: 540px;
	display: flex;
}
.left_box{
	width: 100%;
	height: 100%;
	/*background-color: #aaa;*/
}
.right_box{
	width: 100%;
	height: 100%;
	/*background-color: #bbb;*/
}
.about_us{
	background-color: #ffffff;
}
.about_us_2{
	background-color: #f3f6fa;
}
.right_box img{
	/*height: 400px;*/
	margin-top: 100px;
	margin-left: 100px;
}
.center_box{
	width: 500px;
	height: 100%;
	margin: 0 auto 0;
	/*display: flex;*/
	/*flex-wrap: wrap;*/
	/*align-content: center;*/
}
.center_box .a1{
	font-size: 42px;
	width: 100%;
	margin: 100px 0 0;
	font-weight: 900;
	color: #2283F6;
}
.center_box .a2{
	width: 100%;
	font-size: 42px;
	margin: 0;
	/*font-weight: 600;*/
	color: #2283F6;
	position: relative;
}
.center_box .a2:before{
	content: "";
	position: absolute;
	width: 50px;
	height: 0px;
	bottom: 0px;
	border-style: none none solid none;
}
.center_box .a3{
	font-size: 22px;
	font-weight: 900;
	margin-bottom: 0;
	color: #333333;
}
.center_box .a4{
	display: block;
	width: 530px;
	font-size: 15px;
	color: #333333;
	line-height: 26px;
}