*{margin: 0;padding: 0;}

a{
	text-decoration: none;
}

ul{
	list-style: none;
}

.big_box{
	width: 100%;
	box-sizing: border-box;
	padding: 50px 0 80px 0;
}

.box{
	width: 1050px;
	height: 400px;
	display: flex;
	justify-content: space-around;
	align-items: center;
	margin: 0 auto;
}

.box_two{
	width: 1050px;
	height: 315px;
	display: flex;
	justify-content: space-around;
	align-items: center;
	margin: 0 auto;
}

.show_box{
	width: 220px;
	height: 310px;
	position: relative;
	overflow: hidden;
	background: rgba(0,0,0,0.9);
	transition: all 0.5;
}

.show_box i{
	position: absolute;
	left: 0;
	top: 0;
	width: 5px;
	height: 0px;
	display: inline-block;
	background: cornflowerblue;
	transition: all 0.5s;
	z-index: 1000;
}

.show_box em{
	position: absolute;
	right: 0;
	bottom: 0;
	width: 5px;
	height: 0px;
	display: inline-block;
	background: cornflowerblue;
	transition: all 0.5s;
	z-index: 1000;
}

.show_box:after{
	position: absolute;
	content: "";
	display: inline-block;
	width: 0%;
	height: 5px;
	top:0;
	right: 0;
	background: cornflowerblue;
	transition: all 0.5s;
	z-index: 1000;
}

.show_box:before{
	position: absolute;
	content: "";
	display: inline-block;
	width: 0%;
	height: 5px;
	left:0;
	bottom: 0;
	background: cornflowerblue;
	opacity: 1;
	transition: all 0.5s;
	z-index: 1000;
}

.show_box img{
	width: 100%;
	height: 100%;
	transition: all 0.5s;
	opacity: 0.4;
}

.show_box:hover img{
	transform: scale(1.1);
}

.show_box:hover:after{
	width: 100%;
}

.show_box:hover:before{
	width: 100%;
}

.show_box:hover i{
	height: 100%;
}

.show_box:hover em{
	height: 100%;
}

.box_title{
	width: 100%;
	height: 70px;
	line-height: 100px;
	font-size: 28px;
	font-weight: 600;
	letter-spacing: 2px;
	text-align: center;
	color: #306BB1;
}

/*hover文字*/
.show_content{
	position: absolute;
	top: 30%;
	left: 10%;
	width: 80%;
	height: 60%;
	font-size: 22px;
	font-weight: 700;
	color: white;
	transition:all 0.5s;
}

.content_title{
	text-align: center;
}

.content_title_english{
	font-weight: normal;
	font-size: 18px;
	text-align: center;
}

.cotent_hide{
	font-weight: normal;
	font-size: 16px;
	line-height: 30px;
	display: none;
	margin-top: 7%;
}

.show_box:hover .cotent_hide{
	display: block;
}

.show_box:hover .show_content{
	top: 20%;
	color: #00a1df;
}

.show_box:hover{
	background: rgba(0,0,0,1.0);
}

.show_box:hover img{
	opacity: .2;
}

.small_content{
	text-align: center;
	margin-top: 3%;
}

.cotent_hide{
	text-align: center;
}

@media(max-width:980px){
	.big_box{
		width: 100%;
		height: 16rem;
	}
	
	.box{
		width: 100%;
		height: 7.5rem;
		display: initial;
	}
	
	.box_two{
		width: 100%;
		height: 7.5rem;
		display: initial;
	}
	
	.show_box{
		width: 40%;
		margin: 5%;
		height: 6rem;
		float: left;
	}
	
	.show_content{
		font-size: 0.18rem;
	}
	
	.content_title{
		font-size: 0.18rem;
	}
	
	.content_title_english{
		font-size: 0.18rem;
	}
	
	.cotent_hide{
		font-size: 0.18rem;
		line-height: 0.4rem;
	}
}

@media screen and (max-width: 750px) {
	.big_box {
		height: auto;
		padding: .3rem 0 .5rem;
	}
	.box {
		height: auto;
		display: block;
		overflow: hidden;
	}
	.show_box {
		width: 46%;
		margin: 2%;
	}
	.content_title {
		font-size: .4rem;
	}
	.content_title_english {
		font-size: .3rem;
	}
}