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.treeTable-empty {
    width: 30px;
    display: inline-block;
}
 
.treeTable-icon {
    cursor: pointer;
}
 
.treeTable-icon .layui-icon-triangle-d:before {
    content: "\e623";
}
 
.treeTable-icon.open .layui-icon-triangle-d:before {
    content: "\e625";
    background-color: transparent;
}