#head_left a {width:250px;height:100px;margin:0px auto;background-image: url(/resp/img/zs/a2.gif)}
#mob_home{background: url(/resp/img/zs/mob.png) 0px 0px no-repeat;background-size:60px 60px}

@media all and (max-width: 1053px) 
{
    #head_left a{width:100px;background: url(/resp/img/zs/mob.png) 0px 0px no-repeat;background-size:100px 100px}
}