直接贴代码：a:hover { text-decoration: none; background: url("data:image svg+xml,%3Csvg xmlns=& 39;http: www w3

直接贴代码：

 

a:hover {
    text-decoration: none;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 4'%3E%3Cpath fill='none' stroke='%23ff3300' d='M0 3.5c5 0 5-3 10-3s5 3 10 3 5-3 10-3 5 3 10 3'/%3E%3C/svg%3E") repeat-x 0 100%;
    background-size: 20px auto;
    animation: waveMove 1s infinite linear
}

@keyframes waveMove {
    from {
        background-position: 0 100%
    }
    to {
        background-position: -20px 100%
    }
}

article img {
    max-width: 100%;
    margin: 0 auto;
    display: block
}