<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);  }}