.content {
	width:200px;
	height: 100%;
	overflow:hidden;
	position: absolute;
	right:30px;
	z-index:5;
}
.content2 {
	width:200px;
	height: 100%;
	overflow:hidden;
	position: absolute;
	z-index:5;
}
.content3 {
	width:200px;
	height: 100%;
	overflow:hidden;
	position: absolute;
	right:30px;
	z-index:5;
}
.pic_block{
	width: 100%;
	height: -moz-calc(100%/4);    
	height: -webkit-calc(100%/4);       
	height: calc(100%/4);  
	position: relative;
	overflow: hidden;
}
.pic_block:before{
	position: absolute;
	top: 10px;
	right: 15px;
	color: #fff;
	content: attr(data-eng);
	font-size:14px;
	z-index: 1;
	text-decoration:none;
}
.pic_block:after{
	left: 0;
	top: 0;
	content: attr(data-zh);
	font-size:11px;
	display: block;
	position: absolute;
	width: 100%;
	height: 100%;
	text-align: right;
	padding-top: 100%;
	padding-right: 15px;
	color: #fff;
	-webkit-box-sizing: border-box;
	-moz-box-sizing: border-box;
	box-sizing: border-box;
	transition: all 1s;
}

.pic_block.b1:hover:after,.pic_block.b2:hover:after,.pic_block.b3:hover:after,.pic_block.b4:hover:after,.pic_block.b5:hover:after,.pic_block.b6:hover:after,.pic_block.b7:hover:after,.pic_block.b8:hover:after,.pic_block.b9:hover:after,.pic_block.b10:hover:after,.pic_block.b11:hover:after,.pic_block.b12:hover:after,.pic_block.b13:hover:after,.pic_block.b14:hover:after,.pic_block.b15:hover:after,.pic_block.b16:hover:after,.pic_block.b17:hover:after,.pic_block.b18:hover:after,.pic_block.b19:hover:after,.pic_block.b20:hover:after,.pic_block.b21:hover:after,.pic_block.b22:hover:after,.pic_block.b23:hover:after,.pic_block.b24:hover:after,.pic_block.b25:hover:after,.pic_block.b26:hover:after,.pic_block.b27:hover:after,.pic_block.b28:hover:after,.pic_block.b29:hover:after,.pic_block.b30:hover:after,.pic_block.b31:hover:after,.pic_block.b32:hover:after{
	opacity: 1;
	-moz-opacity: 1;
	filter: alpha(opacity=100);
	filter:progid:DXImageTransform.Microsoft.Alpha(Opacity=100);
	-ms-filter:'progid:DXImageTransform.Microsoft.Alpha(Opacity=100)';
	padding-top: 40px;
	text-decoration:none;
}