#page-description {
    height: 320px;
  }
  
  #page-description h2 {
    padding-top: 109px;
    font-size: 40px;
    font-family: Microsoft YaHei;
    font-weight: bold;
    color: white;
  }
  
  #page-description h4 {
    font-size: 22px;
    font-family: Microsoft YaHei;
    font-weight: 400;
    color: #dedede;
  }


.all_bannpic{height:350px; width:100%;}
.all_bannpic img{height:auto; position:absolute;width:1860px;left:50%;margin-left:-930px;}
.firstrefercont:hover{-webkit-box-shadow: 0 15px 30px rgba(0,0,0,0.1);box-shadow:0 0 20px rgba(0, 0, 0, 0.5);-webkit-transform: translate3d(0, -2px, 0); transform: translate3d(0px, -2px, 0);z-index: 1;transition: all 0.2s linear;}