.list_hd{
    margin-top: 60px;
    text-align: center;
}
.list_hd span{
    color: #666;
    padding: 0 15px;
}
.list_hd span i{
    color: #000;
}
.list_bd{
    margin-top: 10px;
    padding-bottom: 40px;
}
.out {
    width: 800px;
    height: 400px;
    margin-top: 50px;
    position: relative;
    left: 30%;
    transform: translateX(-50%);
  }
  .out .inner {
    width: 100%;
    height: 100%;
  }
  .out .inner .img {
    width: 700px;
    height: 400px;
    position: absolute;
    transition: 0.3s;
  }
  .out .inner .img img {
    width: 100%;
    height: 100%;
  }
  .out .arrow {
    font-size: 32px;
  }
  .out .arrow i {
    position: absolute;
    color: #333;
    z-index: 9999;
    cursor: pointer;
    top: 170px;
    font-size: 40px;
  }
  .out .arrow .left {
    left: 180px;
  }
  .out .arrow .right {
    left: 880px;
  }
  .out .button {
    width: 175px;
    height: 15px;
    position: absolute;
    z-index: 9999;
    left: 50%;
    transform: translateX(-50%);
  }
  .out .button p {
    width: 15px;
    height: 15px;
    float: left;
    margin: 0 5px;
    cursor: pointer;
    background-color: silver;
  }
  .out .button p:first-child {
    background-color: #1486bb;
  }
  .out #last {
    transform: translateX(0);
    z-index: 9;
    opacity: 0.4;
  }
  .out #first {
    transform: translateX(200px) scale(1.1);
    z-index: 99;
    opacity: 1;
  }
  .out #second {
    transform: translateX(400px);
    z-index: 9;
    opacity: 0.4;
  }
  .out #left {
    transform: translateX(-100px);
    z-index: 1;
    opacity: 0;
  }
  .out #right {
    transform: translateX(500px);
    z-index: 1;
    opacity: 0;
  }