用css自动闪耀效果

您可以像这个DEMO一样创建CSS动画

 @keyframes shine{
  10% {
    opacity: 1;
    top: -30%;
    left: -30%;
    transition-property: left, top, opacity;
    transition-duration: 0.7s, 0.7s, 0.15s;
    transition-timing-function: ease;
  }
  100% {
    opacity: 0;
    top: -30%;
    left: -30%;
    transition-property: left, top, opacity;
  }
}