.lb-box {
  width: 1550px;
  height: 861px;
  margin: 15px auto;
  position: relative;
  overflow: hidden;
  top: -69px;
  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 > a > 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;
  right: 705px;
  top: 825px;
  padding: 5px 3px;
  border-radius: 6px;
  list-style: none;
  user-select: none;
}

.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;
  }
  #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;
    }
    #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;
    }
    #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;
      right: 246px;
      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;
    }
    #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;
    }
    #company{
      height: 850px;
    }
    #companytwo{
      height: 850px;
    }
    #compthree{
      height: 850px;
    }
    #compfour{
      height: 850px;
    }
  }