ul.qiye{ display:block; width:1200px;margin:0 auto;margin-top:80px;margin-bottom:50px}
ul.qiye::before,
ul.qiye::after{ content:''; display:block; height:0; overflow:hidden; clear:both;}
ul.qiye li{ display:block; width:16.6666%; float:left; margin:0 0 -2.355%;}
ul.qiye li::before,
ul.qiye li::after{ content:''; display:block; height:0; overflow:hidden; clear:both;}
ul.qiye li:nth-child(11n-4){ margin-left:8.3333%;}
ul.qiye li a{ display:block; width:70%; transform:rotate(45deg); margin:0 auto; position:relative;}
ul.qiye li a em{ display:block; width:100%; height:100%; box-shadow:0 0 15px rgba(167,167,167,0.2); position:absolute; left:0; top:0; z-index:1;}
ul.qiye li a i{ display:block; overflow:hidden; position:relative; z-index:5;}
ul.qiye li a img{ display:block; width:100%; height:auto; transform:rotate(-45deg) scale(1.4); position:relative; z-index:5; transition:all ease-in-out 0.4s;}
@media only screen and (max-width: 750px) {
  ul.qiye{width: 100%;}
  ul.qiye li{ width:33.33%;}
ul.qiye li:nth-child(11n-4){ margin-left:0;}
ul.qiye li:nth-child(5n-1){ margin-left:16.66%;}
}