css 制作导航

基础导航栏制作

使用HTML无序列表<ul>和CSS样式创建横向导航栏

<nav>
  <ul class="navbar">
    <li><a href="#">首页</a></li>
    <li><a href="#">产品</a></li>
    <li><a href="#">服务</a></li>
    <li><a href="#">关于</a></li>
    <li><a href="#">联系</a></li>
  </ul>
</nav>

.navbar {
  list-style-type: none;
  margin: 0;
  padding: 0;
  background-color: #333;
  overflow: hidden;
}

.navbar li {
  float: left;
}

.navbar li a {
  display: block;
  color: white;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
}

.navbar li a:hover {
  background-color: #111;
}

响应式导航栏

使用媒体查询实现移动端适配

@media screen and (max-width: 600px) {
  .navbar li {
    float: none;
    width: 100%;
  }
}

下拉菜单实现

添加CSS下拉功能

<li class="dropdown">
  <a href="javascript:void(0)" class="dropbtn">下拉菜单</a>
  <div class="dropdown-content">
    <a href="#">选项1</a>
    <a href="#">选项2</a>
    <a href="#">选项3</a>
  </div>
</li>

.dropdown {
  position: relative;
  display: inline-block;
}

.dropdown-content {
  display: none;
  position: absolute;
  background-color: #f9f9f9;
  min-width: 160px;
  box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
  z-index: 1;
}

.dropdown-content a {
  color: black;
  padding: 12px 16px;
  text-decoration: none;
  display: block;
}

.dropdown-content a:hover {
  background-color: #f1f1f1;
}

.dropdown:hover .dropdown-content {
  display: block;
}

固定定位导航栏

使导航栏固定在页面顶部

.navbar {
  position: fixed;
  top: 0;
  width: 100%;
}

动画效果增强

添加过渡动画提升用户体验

.navbar li a {
  transition: background-color 0.3s ease;
}

.dropdown-content {
  transition: all 0.3s ease;
}