.itemDrag {
    height: 100px;
    width: 100%;
    line-height: 100px;
    border-bottom: 1px solid #ccc;
}

.drag_list {
    position: relative;
}

.drag_item {
    background-color: #fff;
    width: 100%;
    position: absolute;
    left: 0;
    transition: top linear 0.3s;
}