C3-简单实现一颗可以跳动的爱心哦~

    
 
 
 
     *{
  margin: 0;
  padding: 0;
     }
     .heart{
  position:absolute;
  left: 50%;
  top:50%;
  margin-left: -150px;
  margin-top: -135px;
  width: 300px;
  height:270px;
  background: transparent;
  
  filter:drop-shadow(0px 0px 20px rgb(255,20,20));
  animation: test 1s linear infinite;
     }
     .heart:before,
     .heart:after{
  content: "";
  position: absolute;
  left: 150px;
  width: 150px;
  height: 240px;
  background: rgb(255,0,0);
  border-radius: 150px 150px 0 0;
  transform:rotate(-45deg);
  transform-origin: 0 100%;
     }
     .heart:after{
  left: 0;
  transform:rotate(45deg);
  transform-origin: 100% 100%;
     }
     @keyframes test{
  0%{
      transform: scale(0.8,0.8);
      opacity: 1;
  }
  25%{
      transform: scale(1,1);
      opacity: 0.8;
  }
  100%{
      transform: scale(0.8,0.8);
      opacity: 1;
  }
     }