* {
            padding: 0;
            margin: 0;
            list-style: none;
            border: 0;
        }

        .all {
            width: 100%;
            height: 500px;
            position: relative;
        }

        .screen {
            width: 100%;
            height: 500px;
            overflow: hidden;
            position: relative;
        }

        .screen li {
            height: 500px;
            background: #000;
            float: left;
            text-align: center;
            position: relative;
        }
        .screen>ul>li>img{
          height:100%;
          width:100%;
        }
        .screen>ul>li>div{
          padding:16px 0px;
          position: absolute;
          width:100%;
          bottom:0px;
          left:0px;
          background: rgba(0,0,0,0.4);
        }
        .screen ul {
            position: absolute;
            left: 0;
            top: 0px;
        }
        #arr span {
            width: 40px;
            height: 40px;
            position: absolute;
            left: 20px;
            top: 50%;
            margin-top: -20px;
            cursor: pointer;
            line-height: 40px;
            text-align: center;
            font-weight: bold;
            font-family: '黑体';
            font-size: 30px;
            color: #fff;
            opacity: 0.4;
            
        }

        #page {
            width: 50px;
            height: 20px;
            border-radius: 10px;
            text-align: center;
            position: absolute;
            left: 10px;
            line-height: 20px;
            bottom: 20px;
            font-size:12px;
            color:#fff;
            display:none;
        }
        #single{
          color:#d24740;
          font-size:20px;
        }
        #arr #right {
            right: 20px;
            left: auto;
        }
        .pp>p{
          width:1300px;
          margin:0 auto;
          text-align: center;
          font-size:16px;
          color:#fff;
        }

        .all ol {
            position: absolute;
            bottom: 80px;
            line-height: 20px;
            text-align: center;
        }

        .all ol li {
            float: left;
            width: 40px;
            height: 3px;
            background: #fff;
            margin-left: 10px;
            cursor: pointer;
        }
         .all ol li.current {
            background: #000;
        }