css3动画特效：上下晃动的div

<div id="square" class="container animated">上下晃动</div>
 
 
 
/**
 * transform-origin 设置旋转元素的基点位置
 * animation-name 设置动画名称
 * animation-duration 设置动画时间
 * animation-fill-mode 设置播放后的状态
 * animation-iteration-count 设置循环播放的次数
 * transition-timing-function: cubic-bezier 贝塞尔曲线效果，它有四个值，指在X轴与Y轴的两个曲线的点，第一个点：X1 Y1;第二个点：X2 Y2
 * transform: translate3d 设置动画Z轴位移几个元素，表示只在Z轴上移动
 *
 * 需要注意：transform: translate3d 不等于 transform: translateZ
 */
 
.animated {
  animation-duration: 1s; /*动画时间*/
  animation-fill-mode: both; /*播放后的状态*/
}
 
.animated {
  animation-iteration-count: infinite; /*动作循环的次数：infinite 无限循环*/
}
 
.animated {
  animation-duration: 2s; /*动画时间*/
}
 
.container {
  background: #2D97DB;
  width: 90%;
  height: 90%;
  padding: 100px;
  margin: 20px auto;
  font-family: "微软雅黑";
  font-size: 40px;
  color: white;
  text-align: center;
  line-height: 90%;
}
 
.container:hover{
  animation-name:container; /*动画的名称*/
  transform-origin: center bottom; /*设置动画旋转元素的基点为：居中靠下*/
  cursor: pointer;
}
 
@keyframes container{
  0%,
  100%,
  20%,
  50%,
  80% {
  transition-timing-function: cubic-bezier(0.215,.61,.355,1); /*贝塞尔曲线 ： X1 Y1 X2 Y2*/
  transform: translate3d(0,0,0); /*设置只在Z轴上移动*/
  }
  40%,
  43%{
  transition-timing-function: cubic-bezier(0.755,0.50,0.855,0.060);
  transform: translate3d(0,-30px,0);
  }
  70%{
  transition-timing-function: cubic-bezier(0.755,0.050,0.855,0.060);
  transform: translate3d(0,-15px,0);
  }
  90%{
  transform: translate3d(0,-4px,0);
  }
}