*{margin:0;padding: 0;}
body {
	background: #fff;
	font-family: 'PingFang SC';
	
}

body {
	-moz-user-select: none;
	/*火狐*/
	-webkit-user-select: none;
	/*webkit浏览器*/
	-ms-user-select: none;
	/*IE10*/
	-khtml-user-select: none;
	/*早期浏览器*/
	user-select: none;
}
.row_a {
	display: flex;
	flex-direction: row;
	justify-content: space-around;
	align-items: center;
}
.row_c {
	display: flex;
	flex-direction: row;
	justify-content: center;
	align-items: center;
}
.row_b {
	display: flex;
	flex-direction: row;
	justify-content: space-between;
	align-items: center;
}
.col_c {
	display: flex;
	flex-direction: column;
	justify-content: center;
	align-items: center;
}
.col_s {
	display: flex;
	flex-direction: column;
	justify-content: flex-start;
	align-items: center;
}
.col {
	display: flex;
	flex-direction: column;
}
a{text-decoration:none;}
.mt10{margin-top: 10px;}
.mt20{margin-top: 20px;}
.mt30{margin-top: 30px;}