下拉菜单

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| <div class="nav"> <div><a href="">首页</a></div> <div><a href="">关于我们</a></div> <div><a href="">个人中心</a></div> <div> <div class="dropdown"> <a href="">下拉菜单</a> <div class="menu"> <div><a href="">我是菜单</a></div> <div><a href="">我是菜单</a></div> <div><a href="">我是菜单</a></div> </div> </div> </div> <div><a href="">我的账户</a></div> </div>
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| .nav { width: 80%; margin: 0 auto; }
a { padding: 0.5em 1em; display: block; color: #444444; font-size: 18px; text-decoration: none; }
a:hover { color: #ffffff; border-radius: 5px; background: orange; }
.nav > div { float: left; padding: 0 12px; }
.nav > div:after { display: block; content: ''; clear: both; }
.dropdown { position: relative; z-index: 10; }
.dropdown .menu { position: absolute; width: 100%; display: none; }
.dropdown:hover { border-top-left-radius: 5px; border-top-right-radius: 5px; background: orange; }
.dropdown:hover .menu { display: block; background: orange; border-bottom-left-radius: 5px; border-bottom-right-radius: 5px; }
.dropdown:hover a { color: #ffffff; }
.menu a:hover { background: rgba(255, 255, 255, .5); border-radius: 0; }
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