HTML+CSS实现下拉菜单的实现

1.下拉列表实例

代码如下：

<!doctype html><html><head>    <meta charset="utf-8"/>    <style>    *{    margin:0;    padding:0;    text-decoration:none;    list-style:none;}body{    text-align:center;}.header{    display:inline-block;    position:relative;    background-color:#4CAF50;}.header:hover .downbtn{    display:block;    background-color: #f1f1f1;}.header:hover{    background-color: #3e8e41;}.header span{    padding:15px;    line-height:61px;    cursor:pointer;    color: white;}.header .downbtn{    display:none;    position:absolute;    background-color:#f9f9f9;    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);    min-width: 160px;}.header .downbtn li{    line-height:30px;    text-align:left;    padding-left:5px;}.header .downbtn a:hover{    text-decoration:underline;    color:#f00;}.header .downbtn a{    display:block;    color:black;    width:100%;    }    </style></head><body>    <div class="header">        <span>下拉列表</span>                <div class="downbtn">            <ul>                <li><a href="#">下拉列表01</a></li>                <li><a href="#">下拉列表02</a></li>                <li><a href="#">下拉列表03</a></li>                <li><a href="#">下拉列表04</a></li>                <li><a href="#">下拉列表05</a></li>            </ul>        </div>    </div></body></html>

效果图如下：