*{
    margin: 0;
    padding: 0;
}
body{
    min-height: 100vh;
    background:#4c4c4c url('https://unsplash.it/1500/900?image=1021');
    background-repeat: no-repeat;
    background-size: cover;
    display: flex;
    justify-content: center;
    align-items: center;
}
.wrapper{
    display: flex;
    width: 850px;
}
.speed{
    flex: 1;
    background: #fff;
    margin:10px ;
    border-radius: 50px;
    overflow: hidden;   /*让子类超出的部分隐藏*/
}
.speed-bar{
    width: 100%;
    height: 16.3%;
    background: linear-gradient(#2376ae,#c16ecf);
    display: flex;
    justify-content: center;
    align-items: center;
    color:#fff;
    cursor: pointer;
}