html - 移动菜单按钮内的条形不会出现在垂直中心

使用下面的代码，我在.container中创建了一个移动菜单按钮.navigation。到目前为止，所有这些工作正常。

但是，我希望移动菜单按钮内的.bars垂直居中。我尝试使用vertical-align: center;，但无法使其正常工作。

我必须在代码中进行哪些更改，以便移动菜单按钮.bars中的.container垂直居中？

您也可以找到我的代码here

body {
  margin: 0;
}

.header {
  width: 80%;
  height: 30%;
  margin-left: 10%;
  display: flex;
  justify-content: space-between;
  position: fixed;
  top: 0;
  box-sizing: border-box;
  border-style: solid;
  border-width: 1px;
  background-color: yellow;
}

.image {
  width: 30%;
  display: flex;
  justify-content: center;
  text-align: center;
  align-items: center;
  box-sizing: border-box;
  border-style: solid;
  border-width: 1px;
  background-color: green;
}

.navigation {
  width: 100%;
  height: 100%;
  box-sizing: border-box;
  border-style: solid;
  border-width: 1px;
}

.container {
 height: 100%;
 width: 20%;
 cursor: pointer;
 float: right;
 box-sizing: border-box;
 border-style: solid;
 border-width: 1px;
 background-color: fuchsia;
}

.bars {
 height: 100%;
 width: 100%;
 vertical-align: center;
}

.bar1, .bar2, .bar3 {
 height: 10%;
 width: 100%;
 background-color: #333;
 margin-top: 8%;
}

<div class="header">

 <div class="image">
 Image
  </div>

  <nav class="navigation">

    <div class="container">
      <div class="bars">
        <div class="bar1"></div>
        <div class="bar2"></div>
        <div class="bar3"></div>
      </div>
    </div>

  </nav>

</div>

最佳答案

因为您已经在使用flexbox，所以将以下样式添加到bars：

display: flex;
justify-content: center;
flex-direction: column;

并为margin: 4% 0，bar1和bar2添加bar3

请参见下面的演示：

body {
  margin: 0;
}

.header {
  width: 80%;
  height: 30%;
  margin-left: 10%;
  display: flex;
  justify-content: space-between;
  position: fixed;
  top: 0;
  box-sizing: border-box;
  border-style: solid;
  border-width: 1px;
  background-color: yellow;
}

.image {
  width: 30%;
  display: flex;
  justify-content: center;
  text-align: center;
  align-items: center;
  box-sizing: border-box;
  border-style: solid;
  border-width: 1px;
  background-color: green;
}

.navigation {
  width: 100%;
  height: 100%;
  box-sizing: border-box;
  border-style: solid;
  border-width: 1px;
}

.container {
  height: 100%;
  width: 20%;
  cursor: pointer;
  float: right;
  box-sizing: border-box;
  border-style: solid;
  border-width: 1px;
  background-color: fuchsia;
}

.bars {
  height: 100%;
  width: 100%;
  display: flex;
  justify-content: center;
  flex-direction: column;
}

.bar1,
.bar2,
.bar3 {
  height: 10%;
  width: 100%;
  background-color: #333;
  margin: 4% 0;
}

<div class="header">
  <div class="image">
    Image
  </div>
  <nav class="navigation">
    <div class="container">
      <div class="bars">
        <div class="bar1"></div>
        <div class="bar2"></div>
        <div class="bar3"></div>
      </div>
    </div>
  </nav>
</div>