body{background:#f5f5f5;font-family:Arial}
.wrap{max-width:420px;margin:120px auto;background:#fff;padding:30px;border-radius:10px}
.slider{position:relative;height:50px;background:#eee;border-radius:25px;overflow:hidden}
.bg{position:absolute;left:0;top:0;height:100%;width:0;background:#4caf50}
.text{position:absolute;width:100%;line-height:50px;text-align:center}
.btn{position:absolute;left:0;top:0;width:50px;height:50px;border-radius:50%;background:#fff;display:flex;justify-content:center;align-items:center;cursor:pointer}