li.list-item {
    display: flex;
    position: relative;
    padding: 0;
    margin: 0;
    height: 30px;
    min-height: 30px;
    align-items: center;
    line-height: 30px;
    list-style: none;
    cursor: default;
    .index {
        width: 40px;
        text-align: center;
        color: #999;
    }
    .name {
        margin-right: .5em;
    }
    .pop {
        display: flex;
        margin-right: .5em;
        cursor: pointer;
    }
    .by {
        flex: 1;
        color: #666;
        text-align: right;
    }
}
li.list-item.playing{
    background: #e9e9e9 !important;
}
li.list-item.disabled{
    color: #bbb;
    .by {
        color: #bbb;
    }
}