._container {
    height: 14px;
    overflow: hidden;
}
._container li {
    height: 14px;
    line-height: 14px;
    /* font-size: 12px; */
}
._container li:first-child {
    margin-top: 0px;
    transition: margin-top .8s;/*此处可修改每次滚动持续时间*/
}