*{
		box-sizing: border-box;
		-webkit-box-sizing: border-box;
		margin: 0; padding: 0;
	}
	ol, ul{
		list-style: none;
	}
	body{
		background: #fff;
		line-height: normal;
		overflow-x: hidden;
	}
	a{
		text-decoration: none;
	}
	.container{
		width: 75vw;
		margin: 0 auto 0 auto;
	}
	.flf{
		float: left;
		width: 100%;
	}
	.df_c_hv{
		display: flex; flex-wrap: wrap; justify-content: center;
		align-items: center;
	}
	.df_c_v{
		display: flex; flex-wrap: wrap; align-items: center;
	}
	.jcsb{
		justify-content: space-between;
	}
	.child_ts > *{
		transition: 0.3s; -webkit-transition: 0.3s;
	}
	.bfr:before{
		position: absolute;
		width: 100%; height: 100%;
		left: 0; top: 0;
		z-index: -1;
		content: '';
	}