纯CSS打造的Family tree（族谱）

<div class="tree">     <ul>         <li>             <a href="#">Parent</a>             <ul>                 <li>                     <a href="#">Child</a>                     <ul>                         <li><a href="#">Grand Child</a></li>                     </ul>                 </li>                 <li>                     <a href="#">Child</a>                     <ul>                         <li><a href="#">Grand Child</a></li>                         <li>                             <a href="#">Grand Child</a>                             <ul>                                 <li><a href="#">Great Grand Child</a></li>                                 <li><a href="#">Great Grand Child</a></li>                                 <li><a href="#">Great Grand Child</a></li>                             </ul>                         </li>                         <li><a href="#">Grand Child</a></li>                     </ul>                 </li>             </ul>         </li>     </ul> </div> 

.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; }