#case{
	width: 1200px;
	float:left;
}
#case ul li .a1 img{
	width: 370px;
	height: 290px;
}
#case ul li{
	width: 370px;
	height: 267px;
	list-style: none;
	position: relative;
	float: left;
	overflow: hidden;
	margin:20px 10px;
} 
#case ul li .a1 .divA{
	position: absolute;
	bottom: 0;
	left: 0;
	width: 434px;
	height: 36px;
	padding: 10px 20px;
	background: rgba(61,61,61,0.8);
}
#case ul li .a1 .divA>.p1{
	width: 312px;
	height: 25px;
	font-size: 22px;
    line-height: 35px;
    color: #fff;
	float:left;
	text-align:center;
}
/*遮罩*/
#case ul li .a2{
	position: absolute;
	top: 0;
	left:-474PX;
	width: 370px;
	height: 267px;
	text-align: center;
	color: white;
	background: rgba(51,51,51,0.5);
	transition: all 0.2s;  
	
} 

#case ul li .a2 .p4{
	width: 370px;
	text-align: center;
	margin-top:80px;
	color: #fff;
	font-size: 24px;
    font-weight: bold;
    transition: all 0.2s 0.1s ease-out ;  
}
#case ul li .a2 .p5{
	width: 100px;
	line-height:30px;
	margin:40px auto;
	font-size: 16px;
    color: white;
    transition: all 0.2s 0.2s ease-out ;  
	border:1px solid #ffffff;
	border-radius:5px;
}