/**
 * ============
 * 通用配置或样式
 * ============
 **/
.heartbeat {
  display: inline-block;
  animation: animation-heartbeat 1.3s ease 0s infinite normal;
}
@keyframes animation-heartbeat {
  0%,
  28%,
  70% {
    -webkit-transform: scale(1);
    transform: scale(1);
  }
  14%,
  42% {
    -webkit-transform: scale(1.3);
    transform: scale(1.3);
  }
}