.wrap{width: 100%; min-height: 100%; position: relative; overflow: hidden;}

.boundary{width: 100%; max-width: 1024px; margin-left: auto; margin-right: auto; position: relative;}
.img-loading{width: 100%; min-height: 100vh; display: flex; align-items: center; justify-content: center;}
.img-loading img{width: 360px; }

@media screen and (max-width: 500px){
    .img-loading img{width: 60%;}
}