1.幾種常用的清除浮動方法
<style type="text/css">
.div1{background:#000080;border:1px solid red;}
.div2{background:#800080;border:1px solid red;height:100px;margin-top:10px}
.left{float:left;width:20%;height:200px;background:#DDD}
.right{float:right;width:30%;height:80px;background:#DDD}
/*清除浮動代碼*/
.clearfloat:after{display:block;clear:both;content:"";visibility:hidden;height:0}
.clearfloat{zoom:1}
</style>
<div class="div1 clearfloat">
<div class="left">Left</div>
<div class="right">Right</div>
</div>
<div class="div2">
div2
</div>
2.自動截取文字，css實現文字超出顯示省略匯總
單行：
text-overflow: ellipsis;
white-space: nowrap;/*禁止自動換行*/
overflow: hidden;
雙行：
overflow: hidden;
text-overflow: ellipsis;
display: -webkit-box;
-webkit-line-clamp: 2; // 控制多行的行數
-webkit-box-orient: vertical;
