*{
padding: 0px; margin: 0px; } .nav{ width: 500px; height: 35px; border: 1px solid #7FFFD4; position: absolute; top: 0px; left: 0px; } .nav-title{ width: 100px; max-height: 35px; text-align: center; line-height: 35px; float: left; background-color: #7FFF00; font-size: 20px; overflow: hidden; } .nav-title:hover{ background-color: #DC143C; cursor: pointer; max-height: 500px; } .nav-title ul{ /*list-style: none;*/ text-align: center; } .nav-title li{ width: 100px; height: 35px; text-align: center; } .nav-title li:hover{ background-color: aqua; cursor: pointer; } </style> </head> <body> <div class="nav"> <div class="nav-title">首页</div> <div class="nav-title">花魂 <ul> <li>落岩</li> <li>神迹</li> <li>幸运</li> <li>弱火</li> <li>法波</li> </ul> </div> <div class="nav-title">龙须 <ul> <li>冲击</li> <li>必杀</li> <li>敏捷</li> <li>弱雷</li> </ul> </div> <div class="nav-title">龙女 <ul> <li>再生</li> <li>幸运</li> <li>剑气</li> </ul> </div> <div class="nav-title">蝴蝶 <ul> <li>神迹</li> <li>幸运</li> </ul> </div> </div> </body>