CSS实现的大型导航下拉菜单

冷不防 2023-10-06 23:49 4阅读 0赞

#### 阅读目录 ####

*  阐述
 *   *  HTML结构
     *  CSS
 *  预览

## 阐述 ##

这是一款纯 CSS 实现的大型导航下拉菜单。

该大型菜单使用 HTML 和纯 CSS 代码制作，没有任何 js 代码，不依赖任意第三方插件。  
适合用于栏目分类较多的大型网站使用。

### HTML结构 ###

该大型菜单的HTML结构如下：

<nav>
      <ul class="container ul-reset">
        <li><a href='#'>Home</a></li>
        <li class='droppable'>
          <a href='#'>Category One</a>
          <div class='mega-menu'>
            <div class="container cf">
              <ul class="ul-reset">
                <h3>Heading 1</h3>
                <li><a href='#'>Category One Sublink</a></li>
                <li><a href='#'>Category One Sublink</a></li>
                <li><a href='#'>Category One Sublink</a></li>
                <li><a href='#'>Category One Sublink</a></li>
                <li><a href='#'>Category One Sublink</a></li>
              </ul>
              <ul class="ul-reset">
                <h3>Heading 2</h3>
                <li><a href='#'>Category One Sublink</a></li>
                <li><a href='#'>Category One Sublink</a></li>
                <li><a href='#'>Category One Sublink</a></li>
                <li><a href='#'>Category One Sublink</a></li>
                <li><a href='#'>Category One Sublink</a></li>
              </ul>
              <ul class="ul-reset">
                <h3>Heading 3</h3>
                <li><a href='#'>Category One Sublink</a></li>
                <li><a href='#'>Category One Sublink</a></li>
                <li><a href='#'>Category One Sublink</a></li>
                <li><a href='#'>Category One Sublink</a></li>
                <li><a href='#'>Category One Sublink</a></li>
              </ul>
              <ul class="ul-reset">
                <h3>Heading 4</h3>
                <li><img src="http://placehold.it/205x172"></li>
              </ul>
            </div>
          </div>
        </li>
        <li class='droppable'>
          <a href='#'>Category Two</a>
          <div class='mega-menu'>
            <div class="container cf">
              <ul class="ul-reset">
                <h3>Heading 1</h3>
                <li><a href='#'>Category Two Sublink</a></li>
                <li><a href='#'>Category Two Sublink</a></li>
                <li><a href='#'>Category Two Sublink</a></li>
                <li><a href='#'>Category Two Sublink</a></li>
                <li><a href='#'>Category Two Sublink</a></li>
              </ul>
              <ul class="ul-reset">
                <h3>Heading 2</h3>
                <li><a href='#'>Category Two Sublink</a></li>
                <li><a href='#'>Category Two Sublink</a></li>
                <li><a href='#'>Category Two Sublink</a></li>
                <li><a href='#'>Category Two Sublink</a></li>
                <li><a href='#'>Category Two Sublink</a></li>
              </ul>
              <ul class="ul-reset">
                <h3>Heading 3</h3>
                <li><a href='#'>Category Two Sublink</a></li>
                <li><a href='#'>Category Two Sublink</a></li>
                <li><a href='#'>Category Two Sublink</a></li>
                <li><a href='#'>Category Two Sublink</a></li>
                <li><a href='#'>Category Two Sublink</a></li>
              </ul>
              <ul class="ul-reset">
                <h3>Heading 4</h3>
                <li><a href='#'>Category Two Sublink</a></li>
                <li><a href='#'>Category Two Sublink</a></li>
                <li><a href='#'>Category Two Sublink</a></li>
                <li><a href='#'>Category Two Sublink</a></li>
                <li><a href='#'>Category Two Sublink</a></li>
              </ul>
            </div>
          </div>
        </li>
        <li><a href='#'>Category Three</a></li>
        <li><a href='#'>Category Four</a></li>
        <li><a href='#'>Category Five</a></li>
        <li><a href='#'>Category Six</a></li>
      </ul>
    </nav>

### CSS ###

为该大型菜单添加下面的CSS样式：

/* #Resets
    –––––––––––––––––––––––––––––––––––––––––––––––––– */
    html {
        box-sizing: border-box;}
    *, *:before, *:after {
        box-sizing: inherit;  }
    /* #Universal and Default Styles
    –––––––––––––––––––––––––––––––––––––––––––––––––– */
    body {
        
        background: url(../img/black-wood-small.jpg);
        color: #ddd;
        font-family: "Open Sans", sans-serif;
        font-size: 14px;
      line-height: 1;
      margin: 0;
      padding: 0;
      text-align: center;
    }
    a {
        text-decoration: none;}
    h1 {
        
      font-size: 40px;
        font-weight: 700;
      margin-bottom: 20px;
        margin-top: 20px;
    }
    h2 {
        
      font-size: 15px;
        font-weight: 600;
      margin-bottom: 30px;
        margin-top: 10px;
    }
    .container {
        
      margin: auto;
      width: 940px;
    }
    .ul-reset {
        
      padding-left: 0;
       margin-top: 0;
       margin-bottom: 0;
      list-style: none;
    }
    /* #Navigation Styles
    –––––––––––––––––––––––––––––––––––––––––––––––––– */
    nav {
        
      background: #424242;
      font-size: 0;
      position: relative;
    }
    nav > ul > li {
        
      display: inline-block;
        font-size: 14px;
        padding: 0 15px;
        position: relative;
    }
    nav > ul > li:first-child {
        padding-left: 0;}
    nav > ul > li:last-child {
        padding-right: 0;}
    nav > ul > li > a {
        
      color: #fff;
        display: block;
        position: relative;
        padding: 20px 0;
        border-bottom: 3px solid transparent;
    }
    nav > ul > li:hover > a {
        
      color: #69aae0; 
        border-bottom: 3px solid #69aae0;
    }
    /* #Mega Menu Styles
    –––––––––––––––––––––––––––––––––––––––––––––––––– */
    .mega-menu {
        
      background: #f0f0f0;
        display: none;
        left: 0;
        position: absolute;
        text-align: left;
        width: 100%;
    }
    .mega-menu h3 {
        color: #444;}
    .mega-menu ul {
        
      float: left;
        margin-bottom: 20px;
        margin-right: 40px;
        width: 205px;
    }
    .mega-menu ul:last-child {
        margin-right: 0;}
    .mega-menu a {
        
      border-bottom: 1px solid #ddd;
        color: #4ea3d8;
        display: block;
        padding: 10px 0;
    }
    .mega-menu a:hover {
        color: #2d6a91;}
    /* #Droppable Class Styles
    –––––––––––––––––––––––––––––––––––––––––––––––––– */
    .droppable {
        position: static;}
    .droppable > a:after {
        
      content: "\f107";
        font-family: FontAwesome;
        font-size: 12px;
        padding-left: 6px;
        position: relative;
        top: -1px;
    }
    .droppable:hover .mega-menu {
        display: block;}
    /* #Browser Clearfix
    –––––––––––––––––––––––––––––––––––––––––––––––––– */
    .cf:before,
    .cf:after {
        
      content: " "; /* 1 */
       display: table; /* 2 */
    }
    .cf:after {
        clear: both;}

## 预览 ##

![在这里插入图片描述][1da8776bc4374a8eb087a3cee7401822.png]

![在这里插入图片描述][c9b5f2f579e0410083bf5370f9ff9949.png]  
完整代码去资源下载：CSS实现的大型导航下拉菜单

[1da8776bc4374a8eb087a3cee7401822.png]: https://img-blog.csdnimg.cn/1da8776bc4374a8eb087a3cee7401822.png
[c9b5f2f579e0410083bf5370f9ff9949.png]: https://img-blog.csdnimg.cn/c9b5f2f579e0410083bf5370f9ff9949.png