.banner,.banner img{
      width: 100%;
   
  }
  .app {
      margin-top: 80px;
      margin-bottom: 100px;
      text-align: center;
  }
  
  .app ul{
      margin-top: 60px;
  }
  .app h3 {

      font-size: 33px;
      font-family: 'alibb-r';
      font-weight: bold;
      color: #595757;
      line-height: 89px;
  }

  .app span {
      font-size: 17px;
      font-family: 'alibb-l';
      color: #888888;
      display: inline-block;
      width: 80%;
  }

  .app div {
      width: 80%;
      margin: auto;
  }
  .app ul li{
     
      padding-top: 60px;
      padding-bottom: 60px;
  }
  
  .app-p{
 
      height: 17px;
      font-size: 18px;
      margin-top:38px;
      font-family: 'alibb-r';
      color: #595757;
 
  }