#milliaBg{height:299px;background:url(http://w2.jiaodong.net/pic/0/10/41/19/10411953_231553.png) #bb2109 no-repeat top center;}  
@media screen and (max-width:640px){
#milliaBg{height:7rem;background-size:auto 7rem;}
#ad,#PiaoRight{display:none;}
}