.coverflow {
    position: absolute;
    top: 0;
    left: 0;

    width: 100%;
    height: 100%;
    -o-object-fit: cover;
       object-fit: cover;
    will-change: transform;
	}
  .coverflow img{
    display: block;
    position: absolute;
    top:0;
    left:0;
    opacity: 0;
    filter: alpha(opacity=0);
    /*當圖片數量增加，影片長度需更改，變為5s*圖片數量*/
     -webkit-animation: silder 10s linear infinite;
            animation: silder 10s linear infinite;
  }
  .coverflow img{
    max-width: 100%;
  }

/*動畫關鍵影格*/
  @-webkit-keyframes silder {
      0% {
          opacity: 1;
          filter: alpha(opacity=100);
      }
      50% {
          opacity: 0.8;
          filter: alpha(opacity=80);
      }
  }
  @keyframes silder {
      0% {
          opacity: 1;
          filter: alpha(opacity=100);
      }
      50% {
          opacity: 0.8;
          filter: alpha(opacity=80);
      }
  }

/*每個圖片各延遲5秒*/

  .coverflow img:nth-child(2) {
    -webkit-animation-delay: 5s;
            animation-delay: 5s;
  }

  .coverflow img:nth-child(1) {
    -webkit-animation-delay: 0s;
            animation-delay: 0s;    
  }
  
  #GoBack {width:60px; height:60px; position:fixed; right:1em; bottom:1em; z-index:10; cursor:pointer;}