*{margin:0;padding:0;box-sizing:border-box}.app{width:100vw;height:100vh;overflow:hidden;position:relative}img{width:100%;height:100%;object-fit:cover;cursor:pointer;display:block}@media screen and (max-width: 768px){img{object-fit:contain;background-color:#f5f5f5}}@media screen and (max-width: 480px){img{object-fit:contain}}@media screen and (max-width: 768px) and (orientation: landscape){img{object-fit:cover}}