帝国cms按钮怎样做高光划过的CSS3动画效果？

<button class="shiny">下载鸥网站素材下载</button>

<style>
button {
  display: block;
  position: relative;
  top: 0;
  border: 0;
  cursor: pointer;
  background: #9ccc65;
  color: white;
  border-radius: 3px;
  line-height: 1;
  font-size: 20px;
  padding: 15px 25px;
  outline: 0;
  margin: 20px;
  box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
}
button.shiny {
  background: #9ccc65;
  background: linear-gradient(-45deg, #9ccc65 50%, #cde5b2 60%, #9ccc65 70%);
  background-size: 600% 100%;
  -webkit-animation: shine 10s infinite;
          animation: shine 10s infinite;
  -webkit-animation-delay: 0s;
          animation-delay: 0s;
  -webkit-animation-timing-function: linear;
          animation-timing-function: linear;
}

@-webkit-keyframes shine {
  0% {
    background-position-x: 400%;
  }
  50% {
    background-position-x: 0%;
  }
  100% {
    background-position-x: -400%;
  }
}

@keyframes shine {
  0% {
    background-position-x: 400%;
  }
  50% {
    background-position-x: 0%;
  }
  100% {
    background-position-x: -400%;
  }
}
</style>