SOURCE

<div class="bg">
    <p class="slide-line">Welcome to my blog</p>
</div>

.bg{
    background:#000;
    width:1000px;
    height:300px;
    margin:0 auto;
    padding-top:20px;
}
.slide-line{
    width: 1000px;
    font-family: "Microsoft YaHei";
    font-size: 60px;
    /* text-align: center; */
    text-indent:40px;

    background: #111 -webkit-linear-gradient(left, #111, #fff) 0 0 no-repeat;
    background-size: 80px;
 
    -webkit-background-clip: text;
    -webkit-text-fill-color: rgba(255, 255, 255, 0.3);
 
    animation: slideShine 3s infinite;

}


@keyframes slideShine {
    0% {
        background-position: 0 0;
    }
    100% {
        background-position: 100% 100%;
    }
}