.header{margin:auto;width:1200px;*zoom:1}.header-wrap{position:absolute;top:0;left:0;z-index:999;width:100%;height:78px;background:rgba(228,230,232,0)}.header-wrap.fixed{position:fixed;background:#fafafa;background:rgba(255,255,255,.95)}.header .logo{float:left;margin:13px 0 0 40px;width:50px;height:50px;background:url(../images/logo_aca133e.png)}.header .nav{text-align:right}.header .nav a{overflow:hidden;display:inline-block;*zoom:1;margin:21px 41px 0 14px;height:30px;text-align:left;text-indent:-999px}.header .nav .iphone{width:132px;background:url(../images/iphone_4713c43.png) no-repeat 0 5px}.header .nav .iphone:hover{background:url(../images/iphone_hover_cc0d2ad.png) no-repeat 0 5px}.header .nav .android{width:146px;background:url(../images/android_9d71607.png) no-repeat 0 6px}.header .nav .android:hover{background:url(../images/android_hover_c0fc8bc.png) no-repeat 0 6px}.header .nav .liulan{width:65px;background:url(../images/liulan_76a9cc8.png) no-repeat 0 8px}.header .nav .liulan:hover{background:url(../images/liulan_hover_e0026b0.png) no-repeat 0 8px}