h1 .HeaderMainTitle{
font-size:40px;
background: -webkit-linear-gradient(left,
        #ffffff,
        #ff0000 6.25%,
        #ff7d00 12.5%,
        #ffff00 18.75%,
        #00ff00 25%,
        #00ffff 31.25%,
        #0000ff 37.5%,
        #ff00ff 43.75%,
        #ffff00 50%,
        #ff0000 56.25%,
        #ff7d00 62.5%,
        #ffff00 68.75%,
        #00ff00 75%,
        #00ffff 81.25%,
        #0000ff 87.5%,
        #ff00ff 93.75%,
        #ffff00 100%);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-size: 200% 100%;
        animation: masked-animation 3s infinite linear;
        font-family:楷体;
}
@keyframes masked-animation {
        0% {
            background-position: 0 0;
        }
        100% {
            background-position: -100%, 0;
        }
    }