.ptbox{
	width:610px;
	height:480px;
	display:block;
	margin-right:20px;
	margin-top:20px;
	float:left;
	position:relative;
}

.ptbox:nth-child(2n){
	margin-right:0px
}

.ptbox:hover .cover{
	opacity:1;
}

.cover{
	position:absolute;
	left:0px;
	top:0px;
	width:100%;
	height:100%;
	background:rgba(146,22,24,0.8);
	text-align:center;
	color:white;
	transition:0.5s;
	opacity:0;
}

.c_txt{
	position:absolute;
	left:50%;
	top:50%;
	transform:translate(-50%,-50%);
	color:white;
	width:80%;
}

.c_txt b{
	font-family:'gmarket';
	font-size:30px;
	line-height:33px;
}

.c_txt span{
	font-family:'gmarketl';
	font-size:30px;
	display:block;
	margin-top:25px;
}