* {
      padding: 0;
      margin: 0;
    }

    .clearfix {
      *zoom: 1;
    }

    .clearfix:after {
      content: "";
      display: table;
      clear: both;
    }

    #slide {
      width: 620px;
    }
    #slide ul {
      overflow: hidden;
    }
    #slide ul li {
      list-style: none;
      float: left;
      width: 200px;
      height: 100px;  
      
      color: #FFF;    
      text-align:center;
      line-height: 100px;
      background: red;
      margin: 2px;
    }
    #slide .ul1 li {
      background: #3888ef;
    }
    #slide .ul2 li {
      background: #ff00af;
    }
    .prev,.next {
      width: 60px;
      height: 60px;
      background: #000;
      text-align:center;
      line-height: 60px;
      font-size: 20px;
      color:#fff;
      display: inline-block;
    }