.tu02{
  display:none;

  }
  
  .tu01{
  display:block;
  
  }
  
  
.tu:hover .tu02{
display:block;
  	transform: rotate(0deg) rotateX(0) rotateY(180deg);
   
  }
  
 .tu:hover .tu01{
  display:none;
  transform: rotate(0deg) rotateX(0) rotateY(180deg);
   
  
  
  }
  
  
  
  
.tu img{
  width:100%;
  height:auto;
  transition-property: all;
    transition-duration: 0.6s;
    transition-timing-function: cubic-bezier(0.25,0.1,0.25,1);

  }
  
  .tu {
      padding: 10px;
background-color: rgba(0,99,166,1);


 
  }
  
   .tu:hover {  background-color: rgba(59,192,254,1); }
   .tu span{
    font-family: Microsoft YaHei;
    color: rgba(255,255,255,1);
   text-align: center;
    line-height: 20px;
    margin-top: 20px;
    margin-bottom: 20px;
     display:block;
    font-weight: bold;
    font-size: 16px;

  }