纯css制作下拉菜单

纯CSS下拉菜单实现方法

HTML结构部分

<div class="dropdown">
  <button class="dropdown-btn">菜单</button>
  <div class="dropdown-content">
    <a href="#">选项1</a>
    <a href="#">选项2</a>
    <a href="#">选项3</a>
  </div>
</div>

基础样式设置

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

.dropdown-btn {
  background-color: #4CAF50;
  color: white;
  padding: 12px;
  font-size: 16px;
  border: none;
  cursor: pointer;
}

下拉内容样式

.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
}

悬停显示效果

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

.dropdown:hover .dropdown-btn {
  background-color: #3e8e41;
}

响应式下拉菜单实现

移动端适配

@media screen and (max-width: 600px) {
  .dropdown-content {
    width: 100%;
  }

  .dropdown-btn {
    width: 100%;
  }
}

动画效果增强

.dropdown-content {
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s, visibility 0.3s;
}

.dropdown:hover .dropdown-content {
  opacity: 1;
  visibility: visible;
}

多级下拉菜单实现

HTML结构扩展

<div class="dropdown">
  <button class="dropdown-btn">主菜单</button>
  <div class="dropdown-content">
    <a href="#">选项1</a>
    <div class="dropdown-sub">
      <a href="#">选项2 ▼</a>
      <div class="dropdown-sub-content">
        <a href="#">子选项1</a>
        <a href="#">子选项2</a>
      </div>
    </div>
    <a href="#">选项3</a>
  </div>
</div>

多级菜单CSS

.dropdown-sub {
  position: relative;
}

.dropdown-sub-content {
  display: none;
  position: absolute;
  left: 100%;
  top: 0;
  background-color: #f9f9f9;
  min-width: 160px;
}

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