:root{--sk-size:60px;--sk-color:#ffb3cc}
#home{display:none}
#loading{position:fixed;top:0;left:0;right:0;height:100vh;display:flex;justify-content:center;align-items:center;background-image:url(https://guangzan.gitee.io/awescnb/assets/images/background/cell.gif);z-index:99999}
.sk-fold{width:var(--sk-size);height:var(--sk-size);position:relative;transform:rotateZ(45deg)}
.sk-fold-cube{float:left;width:50%;height:50%;position:relative;transform:scale(1.1)}
.sk-fold-cube:before{content:"";position:absolute;top:0;left:0;width:100%;height:100%;background-color:var(--sk-color);animation:sk-fold 2.4s infinite linear both;transform-origin:100% 100%}
.sk-fold-cube:nth-child(2){transform:scale(1.1) rotateZ(90deg)}
.sk-fold-cube:nth-child(4){transform:scale(1.1) rotateZ(180deg)}
.sk-fold-cube:nth-child(3){transform:scale(1.1) rotateZ(270deg)}
.sk-fold-cube:nth-child(2):before{animation-delay:.3s}
.sk-fold-cube:nth-child(4):before{animation-delay:.6s}
.sk-fold-cube:nth-child(3):before{animation-delay:.9s}
@keyframes sk-fold{
0%,10%{transform:perspective(140px) rotateX(-180deg);opacity:0}
25%,75%{transform:perspective(140px) rotateX(0);opacity:1}
100%,90%{transform:perspective(140px) rotateY(180deg);opacity:0}}