@media only screen and (max-width: 640px) {
	header,.main{
		display: block;
	}
	header{
		width: 100%;
		height: 0.88rem;
		line-height: 0.88rem;
		font-family: "微软雅黑";
		font-size: 0.34rem;
		color: #FFFFFF;
		background:#dc0000;
		text-align: center;
		position: fixed;
		top: 0;
		z-index: 1000000000000000000000000000000000000;
	}
	
	.back{
		position: absolute;
	    left: 0.24rem;
	    top: 0.24rem;
	    width: 0.18rem;
	    height: 0.32rem;
	}
	.back>img{
		display: block;
		width: 0.18rem;
	    height: 0.32rem;
		-webkit-tap-highlight-color: rgba(0,0,0,0);-webkit-tap-highlight-color: transparent;
	}
	
	.main{
		margin-top: 0.88rem;
		position: relative;
	}
	
	
	.main>img{
		display: block;
		width: 100%;
	}
	
	
	.btn{
		display: block;
		width: 4rem;
		height: 0.8rem;
		border-radius: 20px;
		/*background: red;*/
		position: absolute;
		left: 23%;
		bottom: 16.32%;
	}
	
	.pc_main{
		display: none;
	}
	
}
@media only screen and (min-width: 640px){
	header,.main{
		display: none;
	}
	.pc_main{
		display: block;
		width: 100%;
		position: relative;
	}
	.pc_main>img{
		display: block;
		width: 100%;
	}
	.btn2{
		display: block;
		width: 15.21%;
		height: 6.1%;
		/*background: red;*/
		border-radius: 30px;
		position: absolute;
		left: 42.3%;
		bottom: 10.8%;
		cursor: pointer;
	}
}






























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