/**×é¼þÑùʽ**/
.header .logo{position:relative;}
.header .logo .logo-img{position:absolute;left: 50%;
    transform: translateX(-50%);}
.inav .sub.chang{width:265px;}
.inav .sub.chang2{width:210px;}
.inav .sub.chang3{width:160px;}
.pic-bg{position:absolute;width:100%;height:100%;top:0;left:0;right:0;bottom:0;}
.i_box_bk_list .c311 li a{padding-right:15px;}