.m-headerNav{width:100%;height:50px;background:#36f;}

.m-headerNav{text-align: center;height: 50px;line-height: 50px;}
.headerNav-content{position: relative;}
.headerNav-title{display:block;}
.headerNav-img{width:30px;height:100%;position:absolute;top:50%;margin-top:-25px;background: url(/static/newmobile/common/navigator/navtheme30/img/meun.png) no-repeat center center;background-size: 30px 24px;}