问CSS不适合组织结构图(由ul和li构成)

EN

                        Director
                             |
    (1)Joint Director(Account)               (2)Joint Director
                |                                 |
(1)Accountant1    (2)Accountant2     (1)Sales  (2)Production1 (3)Production3
                                          |
                                (1)Sales1  (2)Sales2  (3)Sales3

<div class="tree">
    <ul>
        <li><a href="#">Director</a>
            <ul>
                <li><a href="#">Joint Director(Account)</a>
                    <ul>
                        <li><a href="#">Accountant 1</a></li>
                        <li><a href="#">Accountant 2</a></li>
                    </ul>

                </li>
                <li><a href="#">Joint Director</a></li>
                    <ul>
                        <li><a href="#">Sales</a>
                            <ul>
                                <li><a href="#">Sales1</a></li>
                                <li><a href="#">Sales2</a></li>
                                <li><a href="#">Sales3</a></li>
                            </ul>
                        </li>
                        <li><a href="#">Production1</a></li>
                        <li><a href="#">Production2</a></li>
                    </ul>
            </ul>

        </li>
    </ul>
    </div>

* {margin: 0; padding: 0;}

.tree ul {
padding-top: 20px; position: relative;

transition: all 0.5s;
-webkit-transition: all 0.5s;
-moz-transition: all 0.5s;
}

.tree li {
float: left; text-align: center;
list-style-type: none;
position: relative;
padding: 20px 5px 0 5px;

transition: all 0.5s;
-webkit-transition: all 0.5s;
-moz-transition: all 0.5s;
 }

 /*We will use ::before and ::after to draw the connectors*/

.tree li::before, .tree li::after{
content: '';
position: absolute; top: 0; right: 50%;
border-top: 1px solid #ccc;
width: 50%; height: 20px;
}
.tree li::after{
right: auto; left: 50%;
border-left: 1px solid #ccc;
}

 /*We need to remove left-right connectors from elements without any siblings*/
 .tree li:only-child::after, .tree li:only-child::before {
display: none;
 }

 /*Remove space from the top of single children*/
 .tree li:only-child{ padding-top: 0;}

 /*Remove left connector from first child and right connector from last child*/
 .tree li:first-child::before, .tree li:last-child::after{
border: 0 none;
 }
 /*Adding back the vertical connector to the last nodes*/
.tree li:last-child::before{
border-right: 1px solid #ccc;
border-radius: 0 5px 0 0;
-webkit-border-radius: 0 5px 0 0;
-moz-border-radius: 0 5px 0 0;
 }
 .tree li:first-child::after{
border-radius: 5px 0 0 0;
-webkit-border-radius: 5px 0 0 0;
-moz-border-radius: 5px 0 0 0;
 }

 /*Time to add downward connectors from parents*/
.tree ul ul::before{
content: '';
position: absolute; top: 0; left: 50%;
border-left: 1px solid #ccc;
width: 0; height: 20px;
}

.tree li a{
border: 1px solid #ccc;
padding: 5px 10px;
text-decoration: none;
color: #666;
font-family: arial, verdana, tahoma;
font-size: 11px;
display: inline-block;

border-radius: 5px;
-webkit-border-radius: 5px;
-moz-border-radius: 5px;

transition: all 0.5s;
-webkit-transition: all 0.5s;
-moz-transition: all 0.5s;
 }

 /*Time for some hover effects*/
 /*We will apply the hover effect the the lineage of the element also*/
.tree li a:hover, .tree li a:hover+ul li a {
background: #c8e4f8; color: #000; border: 1px solid #94a0b4;
}
/*Connector styles on hover*/
.tree li a:hover+ul li::after, 
.tree li a:hover+ul li::before, 
.tree li a:hover+ul::before, 
.tree li a:hover+ul ul::before{
border-color:  #94a0b4;
}