logo闪光效果

上代码：

.logo-site:before {
    content:"";
    position:absolute;
    left:-665px;
    top:-460px;
    width:250px;
    height:15px;
    background-color:rgba(255,255,255,.5);
    -webkit-transform:rotate(-45deg);
    -moz-transform:rotate(-45deg);
    -ms-transform:rotate(-45deg);
    -o-transform:rotate(-45deg);
    transform:rotate(-45deg);
    -webkit-animation:searchLights 1s ease-in 1s infinite;
    -o-animation:searchLights 1s ease-in 1s infinite;
    animation:searchLights 1s ease-in 1s infinite
}

@keyframes searchLights {
    0% {
    left:-100px;
    top:0
}
to {
    left:120px;
    top:100px
}
}