.container{ width: 100%; margin: 0 auto; max-width: 750px; min-width: 320px; font-size: 0}
.container img{}
.btn{ margin:0 auto; background:#fff url(mb/btn.png) no-repeat center top/6.4rem; height: 0.84rem;}
.btn a{ display: block; width: 40%; height: 30px; }