HTML学习内容创建兔小白网页

.right .right2 .right21{ text-align: left; /* width: 20%;*/ float: left; background-color: orange; } .right .right2 .right21:hover{ background-color: orange; } .right .right2 .right22{ text-align: center; /* width: 20%;*/ float: right; } .right .right2 .right22:hover{ background-color: orange; } .right .right2 .right23{ /* width: 20%;*/ text-align: center; margin:0 auto; } .right .right2 .right23:hover{ background-color: orange; }