.lb-box {
    width: 1550px;
    height: 861px;
    margin: 15px auto;
    position: relative;
    overflow: hidden;
    top: -50px;
    left: 22px;
    z-index: 12;
  }
  
  
  .lb-content {
    width: 100%;  
    height: 100%;
  }
  
  .lb-item {
    width: 100%;  
    height: 100%;
    display: none;
    position: relative;   
  }
  
  /* .lb-item > a {
    width: 100%;
    height: 100%;
    display: block;
  } */
  
  .lb-item >  img {
    width: 100%;
    height: 100%;
  }
  
  /* .lb-item > a > span {
    width: 100%;
    display: block;
    position: absolute;
    bottom: 0px;
    padding: 15px;
    color: #fff;
    background-color: rgba(0,0,0,0.7);
  } */
  
  
  .lb-item.active {
    display: block;
    left: 0%;
  }
  .lb-item.active.left {
    left: -100%;
  }
  .lb-item.active.right {
    left: 100%;
  }
  
  
  .lb-item.next,
  .lb-item.prev {
    display: block;
    position: absolute;
    top: 0px;
  }
  .lb-item.next {
    left: 100%;
  }
  .lb-item.prev {
    left: -100%;
  }
  .lb-item.next.left,
  .lb-item.prev.right {
    left: 0%;
  }
  
  .lb-sign {
    position: absolute;
    
    top: 825px;
    padding: 5px 3px;
    border-radius: 6px;
    list-style: none;
    user-select: none;
    transform: translateX(-50%);
    left: 50%;
  }
  
  .lb-sign li {
    border-radius: 50%;
    width: 10px;
    height: 10px;
    font-size: 14px;
    font-weight: 500;
    line-height: 20px;
    text-align: center;
    float: left;
    color: #aaa;
    margin: auto 4px;
    border-radius: 3px;
    cursor: pointer;
    border-radius: 50%;
    margin-left: 37px;
  }
  .lb-sign li:hover {
    color: #fff;
  }
  .lb-sign li.active {
    color: #000;
    background-color: #24a2e3;
  }
  .lb-sign li{
    background-color: #fff;
  }
  .lb-ctrl {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    font-size: 50px;
    font-weight: 900;
    user-select: none;
    background-color: #a8a8a8;
    color: #fff;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.1s linear;
  }
  #zuo{
  font-size: 24px;
  position: relative;
  top: -22px;
  }
  #you{
    font-size: 24px;
    position: relative;
    top: -22px;
  }
  .lb-ctrl.left {
    left: -50px;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    font-size: 28px;
  }
  .lb-ctrl .left {
    font-size: 20px;
  }
  .lb-ctrl.right {
    right: -50px;
  font-size: 28px;
    border-radius: 50%;
    width: 40px;
    height: 40px;
  }
  .lb-box:hover .lb-ctrl.left {
    left: 10px;
  }
  .lb-box:hover .lb-ctrl.right {
    right: 10px;
  }
  .lb-ctrl:hover {
    background-color: #a8a8a8;
  }
  @media (min-width: 1500px) and (max-width: 1800px){
    .lb-box{
      width:1424px ;
      /* height: 500px; */
      height: 866px;
    }
  }
  @media (min-width: 1169px) and (max-width: 1500px){
    .lb-box{
      width:1100px ;
      height: 592px;
    }
    .lb-sign {
      position: absolute;
      /* right: 496px; */
      top: 550px;
      padding: 5px 3px;
      border-radius: 6px;
      list-style: none;
      user-select: none;
      transform: translateX(-50%);
      left: 50%;
    }
    /* #company{
      height: 800px;
    }
    #companytwo{
      height: 800px;
    }
    #compthree{
      height: 800px;
    }
    #compfour{
      height: 800px;
    } */
  } 
  @media (min-width: 990px) and (max-width: 1169px){
      .lb-box{
        width:800px ;
        height: 542px;
      } 
      .lb-sign {
        position: absolute;
        /* right: 343px; */
        top: 500px;
        padding: 5px 3px;
        border-radius: 6px;
        list-style: none;
        user-select: none;
        transform: translateX(-34%);
        left: 38%;
      }
      /* #company{
        height: 750px;
      }
      #companytwo{
        height: 750px;
      }
      #compthree{
        height: 750px;
      }
      #compfour{
        height: 750px;
      } */
    }
    @media (min-width: 900px) and (max-width: 990px){
      .lb-box{
        width:800px ;
        height: 571px;
      } 
      .lb-sign {
        position: absolute;
        /* right: 343px; */
        top: 532px;
        padding: 5px 3px;
        border-radius: 6px;
        list-style: none;
        user-select: none;
        transform: translateX(-34%);
    left: 38%;
      }
      /* #company{
        height: 750px;
      }
      #companytwo{
        height: 750px;
      }
      #compthree{
        height: 750px;
      }
      #compfour{
        height: 750px;
      } */
    }
    @media (min-width: 767px) and (max-width: 900px){
      .lb-box{
        width:670px ;
        height: 567px;
      } 
      .lb-sign {
        position: absolute;
        transform: translateX(-34%);
    left: 29%;
        top: 533px;
        padding: 5px 3px;
        border-radius: 6px;
        list-style: none;
        user-select: none;
      }
      /* #company{
        height: 750px;
      }
      #companytwo{
        height: 750px;
      }
      #compthree{
        height: 750px;
      }
      #compfour{
        height: 750px;
      } */
    }
    @media (min-width: 600px) and (max-width: 767px){
      .lb-box{
        width:500px ;
        height: 542px;
      } 
      .lb-sign {
        position: absolute;
        /* right: 180px; */
        top: 509px;
        padding: 5px 3px;
        border-radius: 6px;
        list-style: none;
        user-select: none;
        transform: translateX(-3%);
        left: 2%;
      }
      /* #company{
        height: 750px;
      }
      #companytwo{
        height: 750px;
      }
      #compthree{
        height: 750px;
      }
      #compfour{
        height: 750px;
      } */
    }
    @media (min-width: 480px) and (max-width: 600px){
      .lb-box{
        width:450px ;
        height: 643px;
      } 
      .lb-sign {
        position: absolute;
        right: 145px;
        top: 604px;
        padding: 5px 3px;
        border-radius: 6px;
        list-style: none;
        user-select: none;
        transform: translateX(32%);
        left: -40%;
      }
      /* #company{
        height: 850px;
      }
      #companytwo{
        height: 850px;
      }
      #compthree{
        height: 850px;
      }
      #compfour{
        height: 850px;
      } */
    }