.indexBox{position:relative;width:100%;overflow:hidden;cursor:pointer}.indexBox .index{width:100%;display:block}.indexBox .enter{position:absolute;width:24%;left:75%;top:56%;animation:enter 3s ease-in-out infinite}@keyframes enter{0%,to{transform:scale(1);opacity:1}50%{transform:scale(.9);opacity:.6}}