#app_tip_box a span{ background:url("client-download.png")/*tpa=http://ue.17173cdn.com/images/m/index/2013/client-download.png*/ center center no-repeat #f4f4f4; width:100%; height:157px; display:block; padding:20px 0;}
#app_tip_box .app-tip-close{position:absolute; display: block; top:5px; right:5px; width:84px; height:84px; background:url("client-close.png")/*tpa=http://c.v.17173cdn.com/201401233/images/demand/client-close.png*/ no-repeat; }
@media only screen and (orientation:landscape){
	#app_tip_box a span{ height:74px; background-size:334px 90px;}
	#app_tip_box .app-tip-close{ background-size:50px 50px;}
}
@media only screen 
and (min-device-width : 768px) 
and (max-device-width : 1024px) 
and (orientation : portrait) { 
	#app_tip_box a span{ height:74px; background-size:334px 90px;}
	#app_tip_box .app-tip-close{ background-size:50px 50px;}
}
@media only screen 
and (min-device-width : 768px) 
and (max-device-width : 1024px)
and (-webkit-min-device-pixel-ratio: 2){
	#app_tip_box a span{ height:74px; background-size:334px 90px;}
	#app_tip_box .app-tip-close{ background-size:50px 50px;}
}