@charset "utf-8";
#tb{
	display:grid;
	grid-template-columns:auto auto auto auto;
	column-gap:20px;
	row-gap:20px;
	width:auto;
	height:auto;
	margin:auto;
	overflow:hidden;
	font-size:0px;
}
@media (max-width:767px){#tb{grid-template-columns:auto auto auto;}}
@media (max-width:480px){#tb{grid-template-columns:auto auto;}}
@media (max-width:280px){#tb{grid-template-columns:auto;}}
.tb_item{
	width:auto;
	height:auto;
	overflow:hidden;
	overflow:hidden;
	display:block;
}

a.tb_tb{
	width:auto;
	height:auto;
	overflow:hidden;
	display:block;
	margin:auto;
	background-color:#fff;
	border:1px solid #ddd;
	transition:all 0.4s;
	padding:15px;
	text-align:left;
}
a.tb_tb:hover{
	transition:all 0.4s;
	border:1px solid #ccc;
}

.tb_pic{
	width:auto;
	height:250px;
	overflow:hidden;
	display:block;
	margin:auto;
	position:relative;
}
@media (max-width:767px){.tb_pic{height:200px;}}
@media (max-width:480px){.tb_pic{height:150px;}}
.tb_name{
	width:auto;
	height:auto;
	display:block;
	margin:auto;
	overflow:hidden;
	white-space:nowrap;
	font-size:16px;
	line-height:1.5;
}
.tb_class_name{
	width:auto;
	height:auto;
	display:block;
	margin:auto;
	overflow:hidden;
	white-space:nowrap;
	color:#F60;
}
.tb_miaoshu{
	width:auto;
	height:auto;
	display:block;
	margin:auto;
	overflow:hidden;
	color:#888;
	font-size:13px;
	line-height:1.4;
	text-overflow:ellipsis;
    display:-webkit-box;
    -webkit-line-clamp:2;
    -webkit-box-orient:vertical;

}