$img: "https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fimg1.dwstatic.com%2Flol%2F1411%2F279563393088%2F1415612621611.jpg&refer=http%3A%2F%2Fimg1.dwstatic.com&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=jpeg?sec=1617506797&t=028bdc20b30f8dc8257e8f13d924b9f3";

div {

    position: relative;

    margin: 0 auto;

    width: 960px;

    height: 600px;

}

​

.mask {

    width: 100%;

    height: 100%;

    background: url($img) no-repeat center center;

    background-size: cover;

    filter: blur(10px);

    transition: .3s;

}

​

p {

    position: absolute;

    top: 0%;

    left: 0;

    width: 100%;

    height: 100%;

    text-align: center;

    z-index: 1;

    font-size: 180px;

    font-weight: bold;

    background: url($img) no-repeat center center;

    background-size: cover;

    -webkit-background-clip: text;

    color: transparent;

    animation: move 4s ease-in infinite alternate;

}

​

@keyframes move {

    0% {

        line-height: 100px;

        font-size: 100px;

    }

    100% {

        line-height: 600px;

        font-size: 1500px;

    }

}