*{
			margin: 0;
			padding: 0;
			background: #514d49;
		}
		.wrapper{
			width: 100%;
			height: 100%;
			
		}
		.h1{
			text-align: center;
		    font-family: "黑体";
		    color: #fff;
		    font-size: 72px;
		    margin: 0 auto;
		    width: 100%;
		    margin-top: 30px;
		}
		.a{
			display: block;
			width: 442px;
			height: 597px;
			float: left;
			border-radius: 20px;
			position: relative;
			background: #514d49;
			margin-right: 155px;
		}
		.a:hover .white{
			display: none;
		}
		.white{
			width: 100%;
			height: 100%;
			background: rgba(255,255,255,0.5);
			position: absolute;
			top: 0;
			border-radius: 20px;
		}
		.a_wra{
			margin: 100px auto;
    		width: 55%;
		}
		.a img{
			width: 100%;
			height: 100%;
		}
		.clearfix:after{
			height: 0;
			display: block;
			content: "";
			clear: both;
			visibility: hidden;
		}