逼真的HTML5+CSS3窗帘拉开收起动画特效

html {
  box-sizing: border-box;
}
*, *::after, *::before {
  box-sizing: inherit;
}
*, *:before, *:after {
  box-sizing: border-box;
  outline: none;
}
body {
  width: 100%;
  height: 100vh;
  font-family: 'Source Sans Pro', sans-serif;
  font-size: 16px;
  font-smooth: auto;
  font-weight: 300;
  line-height: 1.5;
  color: #444;
  background-color: black;
  background-image: url("img/zzsc.jpg");
  background-position: center center;
  background-repeat: no-repeat;
  background-size: contain;
}
body:before {
  position: absolute;
  content: '';
  width: 100%;
  height: 84.25%;
  box-shadow: inset 0 0 200px 200px black;
  z-index: 1;
}

这是一款个性逼真的CSS3窗帘拉开收起动画特效，有意思的仿窗帘开关动画效果。