废话不多说了，直接大家贴代码了，具体代码如下所示；

*{ margin: 0; padding: 0; } ul,li{ list-style: none; } .ui-slide-box{ width: 300px; } .ui-slide-item{ width: 100%; position: relative; } .ui-slide-item-text{ display: block; background-color: #000000; color: white; border-bottom: 1px solid yellow; height: 40px; line-height: 40px; } .ui-slide-item .ui-slide-box{ display: none; position: absolute; left: 300px; top: 0; } .ui-slide-item:hover > .ui-slide-box{ display: block; }<ul class="ui-slide-box"> <li class="ui-slide-item"> <span class="ui-slide-item-text">aaaaaaaaaaaaa</span> <ul class="ui-slide-box"> <li class="ui-slide-item"> <span class="ui-slide-item-text">aaaaaaaaaaaa</span> <ul class="ui-slide-box"> <li class="ui-slide-item"> <span class="ui-slide-item-text">dddddddd </span> </li> <li class="ui-slide-item"> <span class="ui-slide-item-text">sssssssssssss</span> </li> <li class="ui-slide-item"> <span class="ui-slide-item-text">eeeeeeeeeeee</span> </li> <li class="ui-slide-item"> <span class="ui-slide-item-text">ccccccccccccc</span> <ul class="ui-slide-box"> <li class="ui-slide-item"> <span class="ui-slide-item-text">aaaaaaaaaaaaa</span> <ul class="ui-slide-box"> <li class="ui-slide-item"> <span class="ui-slide-item-text">aaaaaaaaaaaa</span> <ul class="ui-slide-box"> <li class="ui-slide-item"> <span class="ui-slide-item-text">dddddddd </span> </li> <li class="ui-slide-item"> <span class="ui-slide-item-text">sssssssssssss</span> </li> <li class="ui-slide-item"> <span class="ui-slide-item-text">eeeeeeeeeeee</span> </li> <li class="ui-slide-item"> <span class="ui-slide-item-text">ccccccccccccc</span> </li> </ul> </li> <li class="ui-slide-item"> <span class="ui-slide-item-text">bbbbbbbbbb</span> <ul class="ui-slide-box"> <li class="ui-slide-item"> <span class="ui-slide-item-text">sfsdfsdfsd </span> </li> <li class="ui-slide-item"> <span class="ui-slide-item-text">cvwdfsd</span> </li> <li class="ui-slide-item"> <span class="ui-slide-item-text">ewewewe</span> </li> <li class="ui-slide-item"> <span class="ui-slide-item-text">xxcxc</span> </li> </ul> </li> </ul> </li> </ul> </li> </ul> </li> <li class="ui-slide-item"> <span class="ui-slide-item-text">bbbbbbbbbb</span> <ul class="ui-slide-box"> <li class="ui-slide-item"> <span class="ui-slide-item-text">sfsdfsdfsd </span> </li> <li class="ui-slide-item"> <span class="ui-slide-item-text">cvwdfsd</span> </li> <li class="ui-slide-item"> <span class="ui-slide-item-text">ewewewe</span> </li> <li class="ui-slide-item"> <span class="ui-slide-item-text">xxcxc</span> </li> </ul> </li> </ul> </li> <li class="ui-slide-item"> <span class="ui-slide-item-text">bbbbbbbbbbb</span> <ul class="ui-slide-box"> <li class="ui-slide-item"> <span class="ui-slide-item-text">aaaaaaaaaaaa</span> <ul class="ui-slide-box"> <li class="ui-slide-item"> <span class="ui-slide-item-text">dddddddd </span> </li> <li class="ui-slide-item"> <span class="ui-slide-item-text">sssssssssssss</span> </li> <li class="ui-slide-item"> <span class="ui-slide-item-text">eeeeeeeeeeee</span> </li> <li class="ui-slide-item"> <span class="ui-slide-item-text">ccccccccccccc</span> </li> </ul> </li> </ul> </li> <li class="ui-slide-item"> <span class="ui-slide-item-text">cccccccccccccccccc</span> <ul class="ui-slide-box"> <li class="ui-slide-item"> <span class="ui-slide-item-text">rrrrrrrrrrrrrrrrrrrrrrrrrr</span> <ul class="ui-slide-box"> <li class="ui-slide-item"> <span class="ui-slide-item-text">dddddddd </span> </li> <li class="ui-slide-item"> <span class="ui-slide-item-text">sssssssssssss</span> </li> <li class="ui-slide-item"> <span class="ui-slide-item-text">eeeeeeeeeeee</span> </li> <li class="ui-slide-item"> <span class="ui-slide-item-text">ccccccccccccc</span> </li> </ul> </li> </ul> </li> </ul>

总结

以上所述是小编给大家介绍的CSS实现鼠标悬浮无限向下级展示的实例代码，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对网站的支持！