css精灵

遇到很多像这样的

.ico-server-o1 {background-repeat: no-repeat;}

.ico-server-o2 {background-repeat: no-repeat;}
.ico-server-o3 {background-repeat: no-repeat;}
.ico-server-o4 {background-repeat: no-repeat;}
.ico-server-o5 {background-repeat: no-repeat;}
.ico-server-w1 {background-repeat: no-repeat;}

.ico-server-w2 {background-repeat: no-repeat;}

server-o3,.ico-server-o2,.ico-server-o1,.ico-brand,.ico-flower,.ico-ysh,.ico-Plant,.ico-heart,.ico-city,.ico-num,.ico-color,.ico-price,.ico-sort,.ico-calendar,.ico-pop,.ico-texture,.ico-effect,.ico-sort-gift,header .logo h2,.owl-next,.ico-wxrwm,.ico-xjt,.ico-cart-white{background-image: url(../img/common_z.png)}

.owl-prev,.ico-m-comment,.ico-m-receive,.ico-plus,.ico-m-pay,.ico-phone,.ico-headset,.ico-search,.ico-weixin,.ico-mobile,.ico-member5,.ico-member4,.ico-member3,.ico-weixin-pay,.ico-member2,.ico-member1,.ico-help6,.ico-help5,.ico-help7,.ico-dropdown-arrow,.ico-help8,.ico-help9,.ico-cart,.ico-lock,.ico-star,.ico-user,.ico-help4,.ico-help3,.ico-help2,.ico-help1,.ico-about8,.ico-about7,.ico-about6,.ico-about5,.ico-about4,.ico-about3,.ico-about2,.ico-about1,a:hover .ico-member1,
a:focus .ico-member1,
.active a .ico-member1,
.active a:hover .ico-member1{background-image: url(../img/common_z.png)}