.tree-menu {
  line-height: 1em;
}

.tree-menu,
.tree-menu ul {
  margin: 0;
  padding: 0;
  list-style-type: none;
}

.tree-menu > li {
  margin-bottom: 0.5em;
}

.tree-menu ul {
  position: relative;
  margin-top: -0.5em;
  margin-left: 5em;
}
.tree-menu ul:before {
  content: "";
  display: block;
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 0;
  border-left: 1px solid currentColor;
}

.tree-menu ul li {
  position: relative;
  margin: 0;
  padding: 0.5em 1em;
}

.tree-menu ul li:before {
  content: "";
  display: block;
  position: absolute;
  top: 1.5em;
  left: 0;
  width: 1em;
  height: 0;
  border-top: 1px solid currentColor;
}

.tree-menu ul li:last-child:before {
  top: 1.5em;
  bottom: 0;
  height: auto;
  background-color: #fff;
}
*,
*:before,
*:after {
  box-sizing: inherit;
}
.treebox{
  position:relative;
  border:1px solid #000000;
  width:12em;
  height:2.5em;
  padding:5px;
  display: table-cell;
  vertical-align: middle;
  text-align: center;
  background-color:#DDCCFF;
  border-radius: 5px;        /* CSS3‘�ˆÄ */  
  -webkit-border-radius: 5px;    /* Safari,Google Chrome—p */  
  -moz-border-radius: 5px;   /* Firefox—p */  
}
.tree-menu a div{
  background-color:#CCEEFF;
}
.tree-menu a:hover div{
  background-color:#FFEEDD;
  color:#DD4400;
}