.diamond{
                    margin-top: 100px;
                }
                .diamond ul{
                    margin-top: -37px;
                    text-align: center;
                }
                .diamond ul li{
                    display: inline-block;
                    margin-left: 72px;
                    width: 150px;
                    height: 150px;
                    -webkit-box-sizing: border-box;
                    -moz-box-sizing: border-box;
                    box-sizing: border-box;
                    -webkit-transform:rotate(45deg);
                    -moz-transform:rotate(45deg);
                    transform:rotate(45deg);
                    border: 1px solid #ccc;
                    /*overflow: hidden;*/
                }
                .diamond ul li img{
                    width: 70%;
                    height: 70%;
                    margin-top: 15%;
                    transition: all ease .3s;
                    -webkit-transform:rotate(-45deg);
                    -moz-transform:rotate(-45deg);
                    transform:rotate(-45deg);
                
                }
                .diamond ul li img:hover{
                    opacity: .5;
                }
                .diamond>ul:nth-child(2n){
                    margin-left: -115px;
                    margin-right: -115px;
                }