前端的鼠标滑过图片闪光CSS3效果怎么做？

div{width:800px;height:600px;overflow:hidden;}                  /div宽度和高度 超出隐藏
div a:hover::before{transition: all 0.5s;left:850px;}               /css3过度样式  before离左边850像素
div a:before{content: "";                  
    position: absolute;
    width: 50px;
    height: 600px;
    top: 0;
    left: -130px;
    background: -moz-linear-gradient(left,rgba(255,255,255,0)0,rgba(255,255,255,.2)50%,rgba(255,255,255,0)100%);
    background: -webkit-gradient(linear,left top,right top,color-stop(0%,rgba(255,255,255,0)),color-stop(50%,rgba(255,255,255,.2)),color-stop(100%,rgba(255,255,255,0)));
    background: -webkit-linear-gradient(left,rgba(255,255,255,0)0,rgba(255,255,255,.2)50%,rgba(255,255,255,0)100%);
    background: -o-linear-gradient(left,rgba(255,255,255,0)0,rgba(255,255,255,.2)50%,rgba(255,255,255,0)100%);
    -webkit-transform: skewX(-25deg);
    -moz-transform: skewX(-25deg);}              /这里是给反光加样式的css3代码，就不一一解释了