HTML5 3D立方体旋转动画(纯css实现，基于keyframes+translateZ)

【实例截图】

【核心代码】

* {
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
}

html {
  background: -webkit-radial-gradient(center, ellipse, #430d6d 0%, #000000 100%);
  background: radial-gradient(ellipse at center, #430d6d 0%, #000000 100%);
  height: 100%;
}

body {
  height: 20em;
  left: 50%;
  margin-left: -10em;
  margin-top: -10em;
  -webkit-perspective: 1000px;
  -ms-perspective: 1000px;
  perspective: 1000px;
  position: absolute;
  top: 50%;
  width: 20em;
}

cube {
  -webkit-animation: 6s spin linear infinite;
  animation: 6s spin linear infinite;
  height: 100%;
  position: absolute;
  -webkit-transform-style: preserve-3d;
  -ms-transform-style: preserve-3d;
  transform-style: preserve-3d;
  width: 100%;
}

cube * {
  background: -webkit-linear-gradient(270deg, rgba(0, 0, 0, 0) 0px, rgba(54, 226, 248, 0.5) 0%, rgba(54, 226, 248, 0.5) 3px, rgba(0, 0, 0, 0) 0px), -webkit-linear-gradient(0deg, rgba(0, 0, 0, 0) 0px, rgba(54, 226, 248, 0.5) 0%, rgba(54, 226, 248, 0.5) 3px, rgba(0, 0, 0, 0) 0px);
  background: linear-gradient(180deg, rgba(0, 0, 0, 0) 0px, rgba(54, 226, 248, 0.5) 0%, rgba(54, 226, 248, 0.5) 3px, rgba(0, 0, 0, 0) 0px), linear-gradient(90deg, rgba(0, 0, 0, 0) 0px, rgba(54, 226, 248, 0.5) 0%, rgba(54, 226, 248, 0.5) 3px, rgba(0, 0, 0, 0) 0px);
  -webkit-background-size: 2.5em 2.5em, 2.5em 2.5em;
  background-size: 2.5em 2.5em, 2.5em 2.5em;
  background-color: rgba(0, 0, 0, 0.5);
  border: 2px solid rgba(54, 226, 248, 0.5);
  -webkit-box-shadow: 0 0 5em rgba(0, 128, 0, 0.4);
  box-shadow: 0 0 5em rgba(0, 128, 0, 0.4);
  display: block;
  height: 20em;
  position: absolute;
  width: 20em;
}
cube *:before {
  background: -webkit-radial-gradient(center, ellipse, rgba(0, 0, 0, 0) 30%, rgba(0, 128, 0, 0.2) 100%);
  background: radial-gradient(ellipse at center, rgba(0, 0, 0, 0) 30%, rgba(0, 128, 0, 0.2) 100%);
  content: '';
  height: 100%;
  position: absolute;
  width: 100%;
}

back {
  -webkit-transform: rotateX(180deg) translateZ(10em);
  -ms-transform: rotateX(180deg) translateZ(10em);
  transform: rotateX(180deg) translateZ(10em);
}

bottom {
  -webkit-transform: rotateX(-90deg) translateZ(10em);
  -ms-transform: rotateX(-90deg) translateZ(10em);
  transform: rotateX(-90deg) translateZ(10em);
}

front {
  -webkit-transform: rotateY(0deg) translateZ(10em);
  -ms-transform: rotateY(0deg) translateZ(10em);
  transform: rotateY(0deg) translateZ(10em);
}

left {
  -webkit-transform: rotateY(-90deg) translateZ(10em);
  -ms-transform: rotateY(-90deg) translateZ(10em);
  transform: rotateY(-90deg) translateZ(10em);
}

right {
  -webkit-transform: rotateY(90deg) translateZ(10em);
  -ms-transform: rotateY(90deg) translateZ(10em);
  transform: rotateY(90deg) translateZ(10em);
}

top {
  -webkit-transform: rotateX(90deg) translateZ(10em);
  -ms-transform: rotateX(90deg) translateZ(10em);
  transform: rotateX(90deg) translateZ(10em);
}

@-webkit-keyframes background {
  to {
    -webkit-background-size: 20em 20em, 20em 20em;
    background-size: 20em 20em, 20em 20em;
  }
}

@keyframes background {
  to {
    -webkit-background-size: 20em 20em, 20em 20em;
    background-size: 20em 20em, 20em 20em;
  }
}
@-webkit-keyframes spin {
  from {
    -webkit-transform: translateZ(-10em) rotateX(0) rotateY(0deg);
    transform: translateZ(-10em) rotateX(0) rotateY(0deg);
  }

  to {
    -webkit-transform: translateZ(-10em) rotateX(360deg) rotateY(360deg);
    transform: translateZ(-10em) rotateX(360deg) rotateY(360deg);
  }
}
@keyframes spin {
  from {
    -webkit-transform: translateZ(-10em) rotateX(0) rotateY(0deg);
    transform: translateZ(-10em) rotateX(0) rotateY(0deg);
  }

  to {
    -webkit-transform: translateZ(-10em) rotateX(360deg) rotateY(360deg);
    transform: translateZ(-10em) rotateX(360deg) rotateY(360deg);
  }
}