.banner{
	background: url(../images/banner.png) no-repeat;
	background-size: cover;
	height: 549px;
}

.banner.banner1{
    	background: url(../images/banner11.png) no-repeat;
    	background-size: cover;
    	height: 549px;
}
.banner.banner2{
    	background: url(../images/banner12.png) no-repeat;
        background-size: cover;
	    height: 549px;
}

.banner img{
	width: 100%;
	height: 100%;
	object-fit: cover;
}

.bx{
	width: 95%;
	margin: 0 auto;
}

@media screen and (max-width:750px) {
	.bx{
		width: 7rem;
		margin: 0 auto;
	}
	
	.banner{
		height: 3.49rem !important;
		background-size: cover;
	}
	.xin{
		width: 100% !important;
		z-index: 44 !important;
		display: block !important;
	}
}