* {
    margin: 0;
    padding: 0;
    list-style: none;
}

.header_rotating {
    
    width: 1240px;
    height: 700px;
    margin: 50px auto;
    border-radius: 5px ;
    border: 3px solid pink;
    
  }
  
  .rotating_background {  
    width: 100%;
    height: 100%;
    background: url("../imgs/yunwei/lunbodatu1.png");
    background-size: 100% 100%;
    transition: all .2s;
    opacity: 1;
    /* animation: OpacityAnimation 3s; */
    transition-duration: 800ms;
  }
  @keyframes OpacityAnimation {
    0% {
      opacity: 1
    }
  
    100% {
      opacity: 0
    }
  }
  
  .rotating_buttonLeft,
  .rotating_buttonRight {
    position:relative;
    top: 50%;
    width: 41px;
    height: 69px;
  }
  
  .rotating_buttonLeft {
    float: left;
    left: 0;
    background: url("../images/icon-slides.png") -84px 0;
  }
  
  .rotating_buttonRight {
    float: right;
    right: 0px;
    background: url("../images/icon-slides.png") -125px 0;
  }
  
  .rotating_buttonLeft:hover {
    background: url("../images/icon-slides.png") 0 0;
  }
  
  .rotating_buttonRight:hover {
    background: url("../images/icon-slides.png") -43px 0;
  }