*{margin: 0;padding: 0;}

a{
	text-decoration: none;
}

ul{
	list-style: none;
}

.big_box{
	width: 100%;
}

.box{
	width: 1200px;
	margin: 0 auto;
	overflow: hidden;
}

.big_box img{
	width: 100%;
	height: auto;
	display: block;
}

/*.img_box{
	margin-top: 85px;
	width: 1200px;
	height: 360px;
}*/

@media(max-width:980px){
	.big_box{
		width: 100%;
	}
	
	.box{
		width: 100%;
		height: 100%;
	}
	
	.img_box{
		width: 100%;
		height: 100%;
		margin: 0;
		background-size: 100% 100%;
	}
}