.list { width:200px; height:400px; margin-top:20px; float:left; position:relative; border:1px solid black; } dt { font-size:20px; font-family:微软雅黑; font-weight:900; padding:10px; } dl { border-bottom:1px solid black; } dd a { font:15px; font-family:微软雅黑; font-weight:900; padding:10px; display:inline-block; text-decoration:none; }
鼠标移入标题,出现对应的下拉菜单选项