hover li 的右侧选项卡

.Left1{
    width:140px;
    display: none; //***
    overflow: hidden;
    position: absolute;
    top: 0px;
    left: 224px;
    transition: all 0.5s ; //***
}
.bottom-b-L-li:hover .Left1{
    display: block; //***
}