@media only screen and (min-width: 320px) and (max-width: 740px) {
		 .crumbs-left{float: left;width: 100%;}
		 .crumbs-right{display: none;}
          .crumbs-left li{margin-right: 1%;padding: 2% 0;}
          .ab .navigation li{width: 100% !important;}
          .ab .navigation{margin: 4% 0;}
           .ab .content .tu .back h2{font-size: 0.2rem;}		
			}
			
			@media only screen and (min-width: 741px) and (max-width:1200px) {				
            .crumbs-left{float: left;width:100%;}
			 .crumbs-right{display: none;}
			.crumbs-left li{margin-right: 1%;padding: 2% 0;}	
			 .ab .content .tu .back h2{font-size: 0.26rem;}			 
			  .ab .content .tu .back img{float:right;}		   		     	
			}
			@media only screen and (min-width: 1200px)  {					
            .crumbs-left li{margin-right: 4%;padding-top: 4%;}
            .crumbs-left{float: left;width: 50%;}
			 .crumbs-right{float: right;width: 40%;}	
	        .ab .content .tu .back h2{font-size: 0.3rem;}	
	         .ab .content .tu .back img{float:right;}
			}			        
			 .crumbs-left{float: left;}
			 .crumbs-right{float: right;}
			 .crumbs .bx{border-bottom: 1px solid #f7f7f7;}			 
			 .crumbs-left li{float: left;color: #7d7d7d;width: 100%;}
			 .crumbs-right li{float: right;background: #425465;padding: 4.8% 16%;position: relative;}
			 .crumbs-right li a{font-size: 0.16rem;color: #fff;}
			 .sanjiao{
			    border:solid transparent;
			    border-top-color:#00519c;
			    border-width:6px;
			    position:absolute;  
			    left: 48%;
			    top:100%;  
			    display: none;
			}
			.crumbs-right li:hover .sanjiao{display: block;}
			.crumbs-right li:hover{background: #00519c;}
			 .crumbs-left li a{color: #9c9c9c;vertical-align: top;}
			 .crumbs-left li img{vertical-align: 0px; margin-right: 2%;}
             .crumbs{background: rgba(51,51,51,0.1);margin-top: -5px;}
             .ab{padding: 4% 0 3% 0;background: #f5f5f5;}
             .ab .uhd{font-size: 0.16rem;color: #1b1d20;font-weight: bold;}
             .ab h1{color: #1b1d20;font-size: 0.46rem;}
             .ab .navigation{margin-top: 5%;}
             .ab .navigation li{width: 50%;float: left;}
             .ab .navigation li:nth-of-type(1){background: url(../images/about-us-wailian-1.jpg) no-repeat;background-size: cover;}
             .ab .navigation li:nth-of-type(2){background: url(../images/about-us-wailian-2.jpg) no-repeat;background-size: cover;}
             .ab .navigation li a h4{font-size: 0.24rem;color: #fff;margin: 14% 0 0 12%;}
             .ab .navigation li a p{font-size: 0.16rem;color: rgba(255,255,255,0.5);margin: 0 0 9% 12%;}
             .ab .content .tu{position: relative;width: 100%;overflow: hidden;margin-top: 3%;}
             .ab .content .tu .back{position: absolute;left: 0;bottom: 4px;padding: 3.4% 5%;background: rgba(0,81,156,0.8);width: 90%;}
             .ab .content .tu .back h2{width:60%;float:left;color: #fff;}
             .ab .content .text{background: #fff;width: 90%;padding: 3% 5% 5% 5%;margin-top: -4px;}