卡片（Card）

Bootstrap的卡提供了一个灵活的、可扩展的内容容器，其中包含多种变体和选项。

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关于

卡片是一个有弹性且可扩展的内容容器。它包含了页首和页尾的选项、多样化的内容、上下文的背景颜色以及强大的展示选项。如果你很熟悉Bootstrap 3，那卡片将取代旧有的panel，well和thumbnail。与那些元件类似的功能已经都整合到卡片内了

卡片card所有class样式

.card-group
.card
.list-group
.card-header， .card-header-tabs， .card-header-pillstabs和pills主要做tab切换时用
.card-bodytitle,text,link都放在body里面
.card-title
.card-subtitle字体大小没有区别，上下间距小点
.card-text
.card-link
.card-footer
.card-img-overlay将图片转换为卡片背景，并叠加卡片的文字
.card-img， .card-img-top， .card-img-bottom

综合示例：

card-group
Placeholder .card-img-top
.card-title
.card-subtitle

.card-text .card-text .card-text .card-text .card-text .card-text

  • .list-group-item
  • .list-group-item
  • .list-group-item
.card-link .card-link
.card-footer
.card-header
Card title

Some quick example text to build on the card title and make up the bulk of the card's content.

.btn btn-primary
Placeholder .card-img-bottom

例子

卡片被设计成尽可能的少用一些标记和样式，但它仍然可以提供许多的控件和自定义。使用flexbox构建，它们可以更方便的对齐，并与其它的Bootstrap元件良好混合。预设中它并没有margin，所以可以依需求加入spacing通用类别。

以下是一个具有混合内容和固定宽度的基本卡片示例。卡片如果没有固定的宽度，那么它们将自然填充其父元素的全部宽度。这可以透过我们的各种缩放选项轻松调整。

Placeholder Image cap
Card title

Some quick example text to build on the card title and make up the bulk of the card's content.

Go somewhere 
<div class="card" style="width: 18rem;">
        <img src="..." class="card-img-top" alt="...">
        <div class="card-body">
        <h5 class="card-title">Card title</h5>
        <p class="card-text">Some quick example text to build on the card title and make up the bulk of the card's content.</p>
        <a href="#" class="btn btn-primary">Go somewhere</a>
        </div>
        </div>

内容类型

卡片支持各种内容，包含图片、文字、清单群组、连接等。以下为卡片支持的示例。

主体

卡片的构造块是.card-body。当你需要卡片中的填充部分时就使用它。

This is some text within a card body. 
<div class="card">
        <div class="card-body">
        This is some text within a card body.
        </div>
        </div>

标题、文本和链接

在<h*>标签中添加.card-title以使用卡片标题。同样的，在a标签中加入.card-link并使连接彼此相邻。

在<h*>标签中加入.card-subtitle以使用副标题。如果.card-title以及.card-subtitle元件被放在card-body里面，它们将会对齐良好。

Card title
Card subtitle

Some quick example text to build on the card title and make up the bulk of the card's content.

Card link Another link 
<div class="card" style="width: 18rem;">
        <div class="card-body">
        <h5 class="card-title">Card title</h5>
        <h6 class="card-subtitle mb-2 text-muted">Card subtitle</h6>
        <p class="card-text">Some quick example text to build on the card title and make up the bulk of the card's content.</p>
        <a href="#" class="card-link">Card link</a>
        <a href="#" class="card-link">Another link</a>
        </div>
        </div>

图片

设定.card-img-top将会把图片放在卡片的顶部。使用.card-text可以将文字内容可以添加到卡片中。.card-text中的文本也可以用标准的HTML标签设计样式。

Placeholder Image cap

Some quick example text to build on the card title and make up the bulk of the card's content.

<div class="card" style="width: 18rem;">
        <img src="..." class="card-img-top" alt="...">
        <div class="card-body">
        <p class="card-text">Some quick example text to build on the card title and make up the bulk of the card's content.</p>
        </div>
        </div>

列表群組

使用list-group-flush在卡片内建立列表群组。

  • An item
  • A second item
  • A third item
<div class="card" style="width: 18rem;">
        <ul class="list-group list-group-flush">
        <li class="list-group-item">An item</li>
        <li class="list-group-item">A second item</li>
        <li class="list-group-item">A third item</li>
        </ul>
        </div>
Featured
  • An item
  • A second item
  • A third item
<div class="card" style="width: 18rem;">
        <div class="card-header">
        Featured
        </div>
        <ul class="list-group list-group-flush">
        <li class="list-group-item">An item</li>
        <li class="list-group-item">A second item</li>
        <li class="list-group-item">A third item</li>
        </ul>
        </div>
  • An item
  • A second item
  • A third item
Card footer 
<div class="card" style="width: 18rem;">
        <ul class="list-group list-group-flush">
        <li class="list-group-item">An item</li>
        <li class="list-group-item">A second item</li>
        <li class="list-group-item">A third item</li>
        </ul>
        <div class="card-footer">
        Card footer
        </div>
        </div>

混合样式

混合并搭配多个内容形式，用来创建你所需要的卡片。以下示例将图片样式、块、文字样式以及列表群组全部包装在一个固定宽度的卡片中。

Placeholder Image cap
Card title

Some quick example text to build on the card title and make up the bulk of the card's content.

  • An item
  • A second item
  • A third item
Card link Another link 
<div class="card" style="width: 18rem;">
        <img src="..." class="card-img-top" alt="...">
        <div class="card-body">
        <h5 class="card-title">Card title</h5>
        <p class="card-text">Some quick example text to build on the card title and make up the bulk of the card's content.</p>
        </div>
        <ul class="list-group list-group-flush">
        <li class="list-group-item">An item</li>
        <li class="list-group-item">A second item</li>
        <li class="list-group-item">A third item</li>
        </ul>
        <div class="card-body">
        <a href="#" class="card-link">Card link</a>
        <a href="#" class="card-link">Another link</a>
        </div>
        </div>

在卡片内添加选择性的页首和/或页尾。

Featured
Special title treatment

With supporting text below as a natural lead-in to additional content.

Go somewhere 
<div class="card">
        <div class="card-header">
        Featured
        </div>
        <div class="card-body">
        <h5 class="card-title">Special title treatment</h5>
        <p class="card-text">With supporting text below as a natural lead-in to additional content.</p>
        <a href="#" class="btn btn-primary">Go somewhere</a>
        </div>
        </div>

卡片页首的样式可以透过在<h*>元素添加.card-header来调整。

Featured
Special title treatment

With supporting text below as a natural lead-in to additional content.

Go somewhere 
<div class="card">
        <h5 class="card-header">Featured</h5>
        <div class="card-body">
        <h5 class="card-title">Special title treatment</h5>
        <p class="card-text">With supporting text below as a natural lead-in to additional content.</p>
        <a href="#" class="btn btn-primary">Go somewhere</a>
        </div>
        </div>
Quote

A well-known quote, contained in a blockquote element.

Someone famous in Source Title 
<div class="card">
        <div class="card-header">
        Quote
        </div>
        <div class="card-body">
        <blockquote class="blockquote mb-0">
        <p>A well-known quote, contained in a blockquote element.</p>
        <footer class="blockquote-footer">Someone famous in <cite title="Source Title">Source Title</cite></footer>
        </blockquote>
        </div>
        </div>
Featured
Special title treatment

With supporting text below as a natural lead-in to additional content.

Go somewhere
2 days ago 
<div class="card text-center">
        <div class="card-header">
        Featured
        </div>
        <div class="card-body">
        <h5 class="card-title">Special title treatment</h5>
        <p class="card-text">With supporting text below as a natural lead-in to additional content.</p>
        <a href="#" class="btn btn-primary">Go somewhere</a>
        </div>
        <div class="card-footer text-muted">
        2 days ago
        </div>
        </div>

大小

卡片预设没有特定的起始width，除非另有声明，否则它们的宽度将是100%。可以根据需求，透过自定义CSS、网格系统、Sass mixins grid或通用类别来调整。

使用网格

使用网格，根据需要在列和行中包装卡片。

Special title treatment

With supporting text below as a natural lead-in to additional content.

Go somewhere
Special title treatment

With supporting text below as a natural lead-in to additional content.

Go somewhere 
<div class="row">
        <div class="col-sm-6">
        <div class="card">
        <div class="card-body">
          <h5 class="card-title">Special title treatment</h5>
          <p class="card-text">With supporting text below as a natural lead-in to additional content.</p>
          <a href="#" class="btn btn-primary">Go somewhere</a>
        </div>
        </div>
        </div>
        <div class="col-sm-6">
        <div class="card">
        <div class="card-body">
          <h5 class="card-title">Special title treatment</h5>
          <p class="card-text">With supporting text below as a natural lead-in to additional content.</p>
          <a href="#" class="btn btn-primary">Go somewhere</a>
        </div>
        </div>
        </div>
        </div>

使用通用类别

使用我们的几个可调整大小的通用类来快速设置卡片的宽度。

Card title

With supporting text below as a natural lead-in to additional content.

Button
Card title

With supporting text below as a natural lead-in to additional content.

Button 
<div class="card w-75">
        <div class="card-body">
        <h5 class="card-title">Card title</h5>
        <p class="card-text">With supporting text below as a natural lead-in to additional content.</p>
        <a href="#" class="btn btn-primary">Button</a>
        </div>
        </div>
        
        <div class="card w-50">
        <div class="card-body">
        <h5 class="card-title">Card title</h5>
        <p class="card-text">With supporting text below as a natural lead-in to additional content.</p>
        <a href="#" class="btn btn-primary">Button</a>
        </div>
        </div>

使用自定义CSS

在样式表中使用自定义的CSS或使用行内样式设置宽度。

Special title treatment

With supporting text below as a natural lead-in to additional content.

Go somewhere 
<div class="card" style="width: 18rem;">
        <div class="card-body">
        <h5 class="card-title">Special title treatment</h5>
        <p class="card-text">With supporting text below as a natural lead-in to additional content.</p>
        <a href="#" class="btn btn-primary">Go somewhere</a>
        </div>
        </div>

文字对齐

可以透过文字对齐类别更改任何卡片的整体或特定部分的文本对齐方式。

Special title treatment

With supporting text below as a natural lead-in to additional content.

Go somewhere
Special title treatment

With supporting text below as a natural lead-in to additional content.

Go somewhere
Special title treatment

With supporting text below as a natural lead-in to additional content.

Go somewhere 
<div class="card" style="width: 18rem;">
        <div class="card-body">
        <h5 class="card-title">Special title treatment</h5>
        <p class="card-text">With supporting text below as a natural lead-in to additional content.</p>
        <a href="#" class="btn btn-primary">Go somewhere</a>
        </div>
        </div>
        
        <div class="card text-center" style="width: 18rem;">
        <div class="card-body">
        <h5 class="card-title">Special title treatment</h5>
        <p class="card-text">With supporting text below as a natural lead-in to additional content.</p>
        <a href="#" class="btn btn-primary">Go somewhere</a>
        </div>
        </div>
        
        <div class="card text-end" style="width: 18rem;">
        <div class="card-body">
        <h5 class="card-title">Special title treatment</h5>
        <p class="card-text">With supporting text below as a natural lead-in to additional content.</p>
        <a href="#" class="btn btn-primary">Go somewhere</a>
        </div>
        </div>

使用Bootstrap的导航组件在卡片的页首（或块）添加一些导航。

Special title treatment

With supporting text below as a natural lead-in to additional content.

Go somewhere 
<div class="card text-center">
        <div class="card-header">
        <ul class="nav nav-tabs card-header-tabs">
        <li class="nav-item">
          <a class="nav-link active" aria-current="true" href="#">Active</a>
        </li>
        <li class="nav-item">
          <a class="nav-link" href="#">Link</a>
        </li>
        <li class="nav-item">
          <a class="nav-link disabled" href="#" tabindex="-1" aria-disabled="true">Disabled</a>
        </li>
        </ul>
        </div>
        <div class="card-body">
        <h5 class="card-title">Special title treatment</h5>
        <p class="card-text">With supporting text below as a natural lead-in to additional content.</p>
        <a href="#" class="btn btn-primary">Go somewhere</a>
        </div>
        </div>
Special title treatment

With supporting text below as a natural lead-in to additional content.

Go somewhere 
<div class="card text-center">
        <div class="card-header">
        <ul class="nav nav-pills card-header-pills">
        <li class="nav-item">
          <a class="nav-link active" href="#">Active</a>
        </li>
        <li class="nav-item">
          <a class="nav-link" href="#">Link</a>
        </li>
        <li class="nav-item">
          <a class="nav-link disabled" href="#" tabindex="-1" aria-disabled="true">Disabled</a>
        </li>
        </ul>
        </div>
        <div class="card-body">
        <h5 class="card-title">Special title treatment</h5>
        <p class="card-text">With supporting text below as a natural lead-in to additional content.</p>
        <a href="#" class="btn btn-primary">Go somewhere</a>
        </div>
        </div>

图像

卡片包含一些用来处理图片的选项。选择在卡片的任一端附加“image caps”，用卡片内容覆盖图片，或者只是将图象嵌入到卡中。

Image caps

与页首或页尾相似，卡片可以包含顶部或是底部的“Image caps”，即图片是位于卡片的顶部或是底部。

Placeholder Image cap
Card title

This is a wider card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.

Last updated 3 mins ago

Card title

This is a wider card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.

Last updated 3 mins ago

Placeholder Image cap 
<div class="card mb-3">
        <img src="..." class="card-img-top" alt="...">
        <div class="card-body">
        <h5 class="card-title">Card title</h5>
        <p class="card-text">This is a wider card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.</p>
        <p class="card-text"><small class="text-muted">Last updated 3 mins ago</small></p>
        </div>
        </div>
        <div class="card">
        <div class="card-body">
        <h5 class="card-title">Card title</h5>
        <p class="card-text">This is a wider card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.</p>
        <p class="card-text"><small class="text-muted">Last updated 3 mins ago</small></p>
        </div>
        <img src="..." class="card-img-bottom" alt="...">
        </div>

图像重载

将图片转换为卡片背景，并叠加卡片的文字。根据图片，你可以选择是否需要额外的样式或通用类别。

Placeholder Card image
Card title

This is a wider card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.

Last updated 3 mins ago

<div class="card bg-dark text-white">
        <img src="..." class="card-img" alt="...">
        <div class="card-img-overlay">
        <h5 class="card-title">Card title</h5>
        <p class="card-text">This is a wider card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.</p>
        <p class="card-text">Last updated 3 mins ago</p>
        </div>
        </div>
请注意，内容不应大于图片的高度。如果内容大于图片，则内容将显示在图片外面。

水平

结合使用网格以及通用类别，可以让卡片以行动友善且响应式的方法呈现水平状态。在下面的示例中，我们使用.g-0移除网格的间隙，并使用.col-md-*类别让卡片在md断点之后呈现水平。根据卡片内容，将可能会需要一些额外的调整。

Placeholder Image
Card title

This is a wider card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.

Last updated 3 mins ago

<div class="card mb-3" style="max-width: 540px;">
        <div class="row g-0">
        <div class="col-md-4">
        <img src="..." alt="...">
        </div>
        <div class="col-md-8">
        <div class="card-body">
          <h5 class="card-title">Card title</h5>
          <p class="card-text">This is a wider card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.</p>
          <p class="card-text"><small class="text-muted">Last updated 3 mins ago</small></p>
        </div>
        </div>
        </div>
        </div>

卡片样式

卡片包含许多用来自定义背景、边框、颜色的选项。

背景和颜色

使用文字和背景通用类别来改变卡片的外观。

Header
Primary card title

Some quick example text to build on the card title and make up the bulk of the card's content.

Header
Secondary card title

Some quick example text to build on the card title and make up the bulk of the card's content.

Header
Success card title

Some quick example text to build on the card title and make up the bulk of the card's content.

Header
Danger card title

Some quick example text to build on the card title and make up the bulk of the card's content.

Header
Warning card title

Some quick example text to build on the card title and make up the bulk of the card's content.

Header
Info card title

Some quick example text to build on the card title and make up the bulk of the card's content.

Header
Light card title

Some quick example text to build on the card title and make up the bulk of the card's content.

Header
Dark card title

Some quick example text to build on the card title and make up the bulk of the card's content.

<div class="card text-white bg-primary mb-3" style="max-width: 18rem;">
        <div class="card-header">Header</div>
        <div class="card-body">
        <h5 class="card-title">Primary card title</h5>
        <p class="card-text">Some quick example text to build on the card title and make up the bulk of the card's content.</p>
        </div>
        </div>
        <div class="card text-white bg-secondary mb-3" style="max-width: 18rem;">
        <div class="card-header">Header</div>
        <div class="card-body">
        <h5 class="card-title">Secondary card title</h5>
        <p class="card-text">Some quick example text to build on the card title and make up the bulk of the card's content.</p>
        </div>
        </div>
        <div class="card text-white bg-success mb-3" style="max-width: 18rem;">
        <div class="card-header">Header</div>
        <div class="card-body">
        <h5 class="card-title">Success card title</h5>
        <p class="card-text">Some quick example text to build on the card title and make up the bulk of the card's content.</p>
        </div>
        </div>
        <div class="card text-white bg-danger mb-3" style="max-width: 18rem;">
        <div class="card-header">Header</div>
        <div class="card-body">
        <h5 class="card-title">Danger card title</h5>
        <p class="card-text">Some quick example text to build on the card title and make up the bulk of the card's content.</p>
        </div>
        </div>
        <div class="card text-dark bg-warning mb-3" style="max-width: 18rem;">
        <div class="card-header">Header</div>
        <div class="card-body">
        <h5 class="card-title">Warning card title</h5>
        <p class="card-text">Some quick example text to build on the card title and make up the bulk of the card's content.</p>
        </div>
        </div>
        <div class="card text-dark bg-info mb-3" style="max-width: 18rem;">
        <div class="card-header">Header</div>
        <div class="card-body">
        <h5 class="card-title">Info card title</h5>
        <p class="card-text">Some quick example text to build on the card title and make up the bulk of the card's content.</p>
        </div>
        </div>
        <div class="card text-dark bg-light mb-3" style="max-width: 18rem;">
        <div class="card-header">Header</div>
        <div class="card-body">
        <h5 class="card-title">Light card title</h5>
        <p class="card-text">Some quick example text to build on the card title and make up the bulk of the card's content.</p>
        </div>
        </div>
        <div class="card text-white bg-dark mb-3" style="max-width: 18rem;">
        <div class="card-header">Header</div>
        <div class="card-body">
        <h5 class="card-title">Dark card title</h5>
        <p class="card-text">Some quick example text to build on the card title and make up the bulk of the card's content.</p>
        </div>
        </div>
Conveying meaning to assistive technologies

Using color to add meaning only provides a visual indication, which will not be conveyed to users of assistive technologies – such as screen readers. Ensure that information denoted by the color is either obvious from the content itself (e.g. the visible text), or is included through alternative means, such as additional text hidden with the .visually-hidden class.

边框

使用边框通用类别来改变卡片的border-color。你也能在.card父层设置.text-{color}类别，或是如以下示例设置在卡片内容的子集当中。

Header
Primary card title

Some quick example text to build on the card title and make up the bulk of the card's content.

Header
Secondary card title

Some quick example text to build on the card title and make up the bulk of the card's content.

Header
Success card title

Some quick example text to build on the card title and make up the bulk of the card's content.

Header
Danger card title

Some quick example text to build on the card title and make up the bulk of the card's content.

Header
Warning card title

Some quick example text to build on the card title and make up the bulk of the card's content.

Header
Info card title

Some quick example text to build on the card title and make up the bulk of the card's content.

Header
Light card title

Some quick example text to build on the card title and make up the bulk of the card's content.

Header
Dark card title

Some quick example text to build on the card title and make up the bulk of the card's content.

<div class="card border-primary mb-3" style="max-width: 18rem;">
        <div class="card-header">Header</div>
        <div class="card-body text-primary">
        <h5 class="card-title">Primary card title</h5>
        <p class="card-text">Some quick example text to build on the card title and make up the bulk of the card's content.</p>
        </div>
        </div>
        <div class="card border-secondary mb-3" style="max-width: 18rem;">
        <div class="card-header">Header</div>
        <div class="card-body text-secondary">
        <h5 class="card-title">Secondary card title</h5>
        <p class="card-text">Some quick example text to build on the card title and make up the bulk of the card's content.</p>
        </div>
        </div>
        <div class="card border-success mb-3" style="max-width: 18rem;">
        <div class="card-header">Header</div>
        <div class="card-body text-success">
        <h5 class="card-title">Success card title</h5>
        <p class="card-text">Some quick example text to build on the card title and make up the bulk of the card's content.</p>
        </div>
        </div>
        <div class="card border-danger mb-3" style="max-width: 18rem;">
        <div class="card-header">Header</div>
        <div class="card-body text-danger">
        <h5 class="card-title">Danger card title</h5>
        <p class="card-text">Some quick example text to build on the card title and make up the bulk of the card's content.</p>
        </div>
        </div>
        <div class="card border-warning mb-3" style="max-width: 18rem;">
        <div class="card-header">Header</div>
        <div class="card-body">
        <h5 class="card-title">Warning card title</h5>
        <p class="card-text">Some quick example text to build on the card title and make up the bulk of the card's content.</p>
        </div>
        </div>
        <div class="card border-info mb-3" style="max-width: 18rem;">
        <div class="card-header">Header</div>
        <div class="card-body">
        <h5 class="card-title">Info card title</h5>
        <p class="card-text">Some quick example text to build on the card title and make up the bulk of the card's content.</p>
        </div>
        </div>
        <div class="card border-light mb-3" style="max-width: 18rem;">
        <div class="card-header">Header</div>
        <div class="card-body">
        <h5 class="card-title">Light card title</h5>
        <p class="card-text">Some quick example text to build on the card title and make up the bulk of the card's content.</p>
        </div>
        </div>
        <div class="card border-dark mb-3" style="max-width: 18rem;">
        <div class="card-header">Header</div>
        <div class="card-body text-dark">
        <h5 class="card-title">Dark card title</h5>
        <p class="card-text">Some quick example text to build on the card title and make up the bulk of the card's content.</p>
        </div>
        </div>

Mixin通用类

也可以依照需求更改卡片页首、页尾的边框，并能使用bg-transparent来移除它们的background-color。

Header
Success card title

Some quick example text to build on the card title and make up the bulk of the card's content.

Footer
<div class="card border-success mb-3" style="max-width: 18rem;">
        <div class="card-header bg-transparent border-success">Header</div>
        <div class="card-body text-success">
        <h5 class="card-title">Success card title</h5>
        <p class="card-text">Some quick example text to build on the card title and make up the bulk of the card's content.</p>
        </div>
        <div class="card-footer bg-transparent border-success">Footer</div>
        </div>

卡片布局

除了对卡片内容进行样式设计以外，Bootstrap还提供一些用于卡片排版的选项。目前为止，这些排版选项还不是响应式的。

卡片组

使用卡片群组将一系列卡片呈现为具有等宽、高字段的单一、连接元素。卡片群组由堆叠开始，并透过display: flex；从sm的断点后开始以统一的尺寸相连接。

Placeholder Image cap
Card title

This is a wider card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.

Last updated 3 mins ago

Placeholder Image cap
Card title

This card has supporting text below as a natural lead-in to additional content.

Last updated 3 mins ago

Placeholder Image cap
Card title

This is a wider card with supporting text below as a natural lead-in to additional content. This card has even longer content than the first to show that equal height action.

Last updated 3 mins ago

<div class="card-group">
        <div class="card">
        <img src="..." class="card-img-top" alt="...">
        <div class="card-body">
        <h5 class="card-title">Card title</h5>
        <p class="card-text">This is a wider card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.</p>
        <p class="card-text"><small class="text-muted">Last updated 3 mins ago</small></p>
        </div>
        </div>
        <div class="card">
        <img src="..." class="card-img-top" alt="...">
        <div class="card-body">
        <h5 class="card-title">Card title</h5>
        <p class="card-text">This card has supporting text below as a natural lead-in to additional content.</p>
        <p class="card-text"><small class="text-muted">Last updated 3 mins ago</small></p>
        </div>
        </div>
        <div class="card">
        <img src="..." class="card-img-top" alt="...">
        <div class="card-body">
        <h5 class="card-title">Card title</h5>
        <p class="card-text">This is a wider card with supporting text below as a natural lead-in to additional content. This card has even longer content than the first to show that equal height action.</p>
        <p class="card-text"><small class="text-muted">Last updated 3 mins ago</small></p>
        </div>
        </div>
        </div>

当在卡片群组使用页尾，它们的内容将会自动对齐。

Placeholder Image cap
Card title

This is a wider card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.

Last updated 3 mins ago
Placeholder Image cap
Card title

This card has supporting text below as a natural lead-in to additional content.

Last updated 3 mins ago
Placeholder Image cap
Card title

This is a wider card with supporting text below as a natural lead-in to additional content. This card has even longer content than the first to show that equal height action.

Last updated 3 mins ago 
<div class="card-group">
        <div class="card">
        <img src="..." class="card-img-top" alt="...">
        <div class="card-body">
        <h5 class="card-title">Card title</h5>
        <p class="card-text">This is a wider card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.</p>
        </div>
        <div class="card-footer">
        <small class="text-muted">Last updated 3 mins ago</small>
        </div>
        </div>
        <div class="card">
        <img src="..." class="card-img-top" alt="...">
        <div class="card-body">
        <h5 class="card-title">Card title</h5>
        <p class="card-text">This card has supporting text below as a natural lead-in to additional content.</p>
        </div>
        <div class="card-footer">
        <small class="text-muted">Last updated 3 mins ago</small>
        </div>
        </div>
        <div class="card">
        <img src="..." class="card-img-top" alt="...">
        <div class="card-body">
        <h5 class="card-title">Card title</h5>
        <p class="card-text">This is a wider card with supporting text below as a natural lead-in to additional content. This card has even longer content than the first to show that equal height action.</p>
        </div>
        <div class="card-footer">
        <small class="text-muted">Last updated 3 mins ago</small>
        </div>
        </div>
        </div>

网格卡片

使用Bootstrap的网格系统以及.row-cols类别来控制每行应该显示多少网格栏（用于包装卡片）。以下面的例子来说，.row-cols-1将卡片布置为一栏，而.row-cols-md-2将会从md的断点后开始将四个卡片设置为等宽、跨多行。

Placeholder Image cap
Card title

This is a longer card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.

Placeholder Image cap
Card title

This is a longer card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.

Placeholder Image cap
Card title

This is a longer card with supporting text below as a natural lead-in to additional content.

Placeholder Image cap
Card title

This is a longer card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.

<div class="row row-cols-1 row-cols-md-2 g-4">
        <div class="col">
        <div class="card">
        <img src="..." class="card-img-top" alt="...">
        <div class="card-body">
          <h5 class="card-title">Card title</h5>
          <p class="card-text">This is a longer card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.</p>
        </div>
        </div>
        </div>
        <div class="col">
        <div class="card">
        <img src="..." class="card-img-top" alt="...">
        <div class="card-body">
          <h5 class="card-title">Card title</h5>
          <p class="card-text">This is a longer card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.</p>
        </div>
        </div>
        </div>
        <div class="col">
        <div class="card">
        <img src="..." class="card-img-top" alt="...">
        <div class="card-body">
          <h5 class="card-title">Card title</h5>
          <p class="card-text">This is a longer card with supporting text below as a natural lead-in to additional content.</p>
        </div>
        </div>
        </div>
        <div class="col">
        <div class="card">
        <img src="..." class="card-img-top" alt="...">
        <div class="card-body">
          <h5 class="card-title">Card title</h5>
          <p class="card-text">This is a longer card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.</p>
        </div>
        </div>
        </div>
        </div>

更改为.row-cols-3，则会看到第四张卡片被换行。

Placeholder Image cap
Card title

This is a longer card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.

Placeholder Image cap
Card title

This is a longer card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.

Placeholder Image cap
Card title

This is a longer card with supporting text below as a natural lead-in to additional content.

Placeholder Image cap
Card title

This is a longer card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.

<div class="row row-cols-1 row-cols-md-3 g-4">
        <div class="col">
        <div class="card">
        <img src="..." class="card-img-top" alt="...">
        <div class="card-body">
          <h5 class="card-title">Card title</h5>
          <p class="card-text">This is a longer card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.</p>
        </div>
        </div>
        </div>
        <div class="col">
        <div class="card">
        <img src="..." class="card-img-top" alt="...">
        <div class="card-body">
          <h5 class="card-title">Card title</h5>
          <p class="card-text">This is a longer card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.</p>
        </div>
        </div>
        </div>
        <div class="col">
        <div class="card">
        <img src="..." class="card-img-top" alt="...">
        <div class="card-body">
          <h5 class="card-title">Card title</h5>
          <p class="card-text">This is a longer card with supporting text below as a natural lead-in to additional content.</p>
        </div>
        </div>
        </div>
        <div class="col">
        <div class="card">
        <img src="..." class="card-img-top" alt="...">
        <div class="card-body">
          <h5 class="card-title">Card title</h5>
          <p class="card-text">This is a longer card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.</p>
        </div>
        </div>
        </div>
        </div>

如果需要相等高度时，把.h-100添加于卡片上。如果希望卡片预设就是等高，可以在Sass设置$card-height: 100%。

Placeholder Image cap
Card title

This is a longer card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.

Placeholder Image cap
Card title

This is a short card.

Placeholder Image cap
Card title

This is a longer card with supporting text below as a natural lead-in to additional content.

Placeholder Image cap
Card title

This is a longer card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.

<div class="row row-cols-1 row-cols-md-3 g-4">
        <div class="col">
        <div class="card h-100">
        <img src="..." class="card-img-top" alt="...">
        <div class="card-body">
          <h5 class="card-title">Card title</h5>
          <p class="card-text">This is a longer card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.</p>
        </div>
        </div>
        </div>
        <div class="col">
        <div class="card h-100">
        <img src="..." class="card-img-top" alt="...">
        <div class="card-body">
          <h5 class="card-title">Card title</h5>
          <p class="card-text">This is a short card.</p>
        </div>
        </div>
        </div>
        <div class="col">
        <div class="card h-100">
        <img src="..." class="card-img-top" alt="...">
        <div class="card-body">
          <h5 class="card-title">Card title</h5>
          <p class="card-text">This is a longer card with supporting text below as a natural lead-in to additional content.</p>
        </div>
        </div>
        </div>
        <div class="col">
        <div class="card h-100">
        <img src="..." class="card-img-top" alt="...">
        <div class="card-body">
          <h5 class="card-title">Card title</h5>
          <p class="card-text">This is a longer card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.</p>
        </div>
        </div>
        </div>
        </div>

如同卡片群组，卡片页尾也会自动对齐。

Placeholder Image cap
Card title

This is a wider card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.

Last updated 3 mins ago
Placeholder Image cap
Card title

This card has supporting text below as a natural lead-in to additional content.

Last updated 3 mins ago
Placeholder Image cap
Card title

This is a wider card with supporting text below as a natural lead-in to additional content. This card has even longer content than the first to show that equal height action.

Last updated 3 mins ago 
<div class="row row-cols-1 row-cols-md-3 g-4">
        <div class="col">
        <div class="card h-100">
        <img src="..." class="card-img-top" alt="...">
        <div class="card-body">
          <h5 class="card-title">Card title</h5>
          <p class="card-text">This is a wider card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.</p>
        </div>
        <div class="card-footer">
          <small class="text-muted">Last updated 3 mins ago</small>
        </div>
        </div>
        </div>
        <div class="col">
        <div class="card h-100">
        <img src="..." class="card-img-top" alt="...">
        <div class="card-body">
          <h5 class="card-title">Card title</h5>
          <p class="card-text">This card has supporting text below as a natural lead-in to additional content.</p>
        </div>
        <div class="card-footer">
          <small class="text-muted">Last updated 3 mins ago</small>
        </div>
        </div>
        </div>
        <div class="col">
        <div class="card h-100">
        <img src="..." class="card-img-top" alt="...">
        <div class="card-body">
          <h5 class="card-title">Card title</h5>
          <p class="card-text">This is a wider card with supporting text below as a natural lead-in to additional content. This card has even longer content than the first to show that equal height action.</p>
        </div>
        <div class="card-footer">
          <small class="text-muted">Last updated 3 mins ago</small>
        </div>
        </div>
        </div>
        </div>

Masonry

在v4版本我们仅使用CSS技术来模仿Masonry字段效果，但这样的技术带来了许多不愉快的副作用。如果你想要在v5中使用这种排版，则可以使用Masonry的插件。Mansory并没有被包括于Bootstrap，但我们有制作一个demo示例来帮助你开始使用它。

Sass

Variables

$card-spacer-y:                     $spacer;
        $card-spacer-x:                     $spacer;
        $card-title-spacer-y:               $spacer / 2;
        $card-border-width:                 $border-width;
        $card-border-radius:                $border-radius;
        $card-border-color:                 rgba($black, .125);
        $card-inner-border-radius:          subtract($card-border-radius, $card-border-width);
        $card-cap-padding-y:                $card-spacer-y / 2;
        $card-cap-padding-x:                $card-spacer-x;
        $card-cap-bg:                       rgba($black, .03);
        $card-cap-color:                    null;
        $card-height:                       null;
        $card-color:                        null;
        $card-bg:                           $white;
        $card-img-overlay-padding:          $spacer;
        $card-group-margin:                 $grid-gutter-width / 2;
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