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<div class="topnav">
<a class="active" href="#home">主页</a>
<a href="#about">关于</a>
<a href="#contact">联系我们</a>
<input type="text" placeholder="搜索..">
</div>
<div style="padding-left:16px">
<h2>响应式搜索菜单</h2>
<p>导航栏里面有一个搜索框。</p>
<p>调整浏览器窗口的大小, 查看效果。</p>
输入 JavaScript 代码……
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* {box-sizing: border-box;}
body {
margin: 0;
font-family: Arial, Helvetica, sans-serif;
}
.topnav {
overflow: hidden;
background-color: #e9e9e9;
.topnav a {
float: left;
display: block;
color: black;
text-align: center;
padding: 14px 16px;
text-decoration: none;
font-size: 17px;
.topnav a:hover {
background-color: #ddd;
.topnav a.active {
background-color: #2196F3;
color: white;
.topnav input[type=text] {
float: right;
padding: 6px;
margin-top: 8px;
margin-right: 16px;
border: none;
@media screen and (max-width: 600px) {
.topnav a, .topnav input[type=text] {
float: none;
text-align: left;
width: 100%;
padding: 14px;
border: 1px solid #ccc;