emmm...It’s ugly...
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<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>横向菜单</title> <style type="text/css"> *{ margin: 0; padding: 0; box-sizing: border-box; } .wrap{ width: 600px; margin: 0 auto; } a{ text-decoration: none; } .menu{ width: 90px; background: greenyellow; margin: 5px auto; position: relative; text-align: center; transition-duration: 0.5s;/*颜色转变时间*/ /*float: left;*/ } .menu:hover{ background: pink; transition-duration: 0.5s; } .menu ul{ width: 90px; display: none; background: aqua; position: absolute; top:0px; left:90px; border: 1px solid cornflowerblue; } .menu ul li{ list-style-type: none; } .menu ul li a { display: block; padding: 5px 10px; border-bottom: 1px solid transparent; } .menu ul li a:hover{ background: yellow; border-bottom: 1px solid cornflowerblue; } .menu:hover .select_app{ display: block; transition-duration: 0.5s; } </style> </head> <body> <p class="wrap"> <p class="menu"> <a href="#" class="app">应用</a> <ul class="select_app"> <li><a href="#">聊天应用</a></li> <li><a href="#">游戏应用</a></li> <li><a href="#">天气应用</a></li> <li><a href="#">其他应用</a></li> <li><a href="#">聊天应用</a></li> </ul> </p> <p class="menu"> <a href="#" class="app">应用</a> <ul class="select_app"> <li><a href="#">聊天应用</a></li> <li><a href="#">游戏应用</a></li> <li><a href="#">天气应用</a></li> <li><a href="#">其他应用</a></li> <li><a href="#">聊天应用</a></li> </ul> </p> <p class="menu"> <a href="#" class="app">应用</a> <ul class="select_app"> <li><a href="#">聊天应用</a></li> <li><a href="#">游戏应用</a></li> <li><a href="#">天气应用</a></li> <li><a href="#">其他应用</a></li> <li><a href="#">聊天应用</a></li> </ul> </p> <p class="menu"> <a href="#" class="app">应用</a> <ul class="select_app"> <li><a href="#">聊天应用</a></li> <li><a href="#">游戏应用</a></li> <li><a href="#">天气应用</a></li> <li><a href="#">其他应用</a></li> <li><a href="#">聊天应用</a></li> </ul> </p> </p> </body> </html>
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