background-color:red;
background-color:rgb(0,0,255);
background-color:#ffffff;
background-image:url(...);
background_repeat:no-repeat; /*不平铺*/
background_repeat:repeat-y /*Y轴平铺*/
background_repeat:repeat-x /*X轴平铺*/
background-position:-20px -20px;
如果logo长宽为30px 30px ,那么把容器的长宽也也设置为30px 30px ,就刚好完美显示logo。background-position:left bottom; /*靠左靠下*/
background-position:50% 50%; /*在容器中间显示*/
原文:https://www.cnblogs.com/sq800/p/13332056.html