响应式列表组项目从两列变成一列

Question

我正在使用Bootstrap 4，并创建了一个项目列表，并将其分为两两列（参见图片）。当我将网站缩小到移动尺寸屏幕时，它显示如下：

但是我想当我将其缩小到移动设备大小（响应）时，它只显示在一列中。我希望它像这样：

这是我的代码：

.list-group {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  grid-auto-flow: column;
}

li {
  grid-column: 1;
}

li:nth-last-child(-n+7) {
  grid-column: 2;
}

<section class="info2">
  <div class="container">
    <div class="row">
      <div class="col-lg-12 text-center">
        <h2 class="section-heading">Lorem ipsum dolor sit amet.</h2>
      </div>
    </div>
    <ul class="list-group list-group-flush">
      <li class="list-group-item list-group-item-action">
        Lorem ipsum dolor sit amet.
        <i class="fas fa-check"></i>
      </li>
      <li class="list-group-item list-group-item-action">
        Lorem ipsum dolor sit.
        <i class="fas fa-check"></i>
      </li>
      <li class="list-group-item list-group-item-action">
        Lorem, ipsum dolor.
        <i class="fas fa-check"></i>
      </li>
      <li class="list-group-item list-group-item-action">
        Lorem ipsum dolor sit amet.
        <i class="fas fa-check"></i>
      </li>
      <li class="list-group-item list-group-item-action">
        Lorem, ipsum dolor.
        <i class="fas fa-check"></i>
      </li>
      <li class="list-group-item list-group-item-action">
        Lorem ipsum dolor sit.
        <i class="fas fa-check"></i>
      </li>
      <li class="list-group-item list-group-item-action">
        Lorem ipsum dolor sit amet consectetur.
        <i class="fas fa-check"></i>
      </li>
      <li class="list-group-item list-group-item-action">
        Lorem, ipsum dolor.
        <i class="fas fa-check"></i>
      </li>
      <li class="list-group-item list-group-item-action">
        Lorem ipsum dolor sit amet.
        <i class="fas fa-check"></i>
      </li>
      <li class="list-group-item list-group-item-action">
        Lorem, ipsum dolor.
        <i class="fas fa-check"></i>
      </li>
      <li class="list-group-item list-group-item-action">
        Lorem ipsum, dolor sit amet consectetur adipisicing.
        <i class="fas fa-check"></i>
      </li>
      <li class="list-group-item list-group-item-action">
        Lorem, ipsum dolor.
        <i class="fas fa-check"></i>
      </li>
      <li class="list-group-item list-group-item-action">
        Lorem ipsum dolor sit.
        <i class="fas fa-check"></i>
      </li>
      <li class="list-group-item list-group-item-action">
        Lorem, ipsum.
        <i class="fas fa-check"></i>
      </li>
      <li class="list-group-item list-group-item-action">
        Lorem ipsum dolor sit amet.
        <i class="fas fa-check"></i>
      </li>
    </ul>
  </div>

即使这是一个完全的初学者问题，也要感谢您的帮助。

Answer 1

您可以只添加几个media查询，以便CSS仅适用于特定大小的设备。

为了使其在移动设备上成为一列，在较大的设备上成为两列，您需要在media查询中说“在特定设备宽度上”，将创建的CSS变成两列，应用这个。

.list-group {
  display: grid;
  grid-template-columns: 1fr;
}

@media screen and (min-width:767px) {
.list-group {
  grid-template-columns: repeat(2, 1fr);
  grid-auto-flow: column;
}

li {
  grid-column: 1;
}

li:nth-last-child(-n+7) {
  grid-column: 2;
}

}

<section class="info2">
  <div class="container">
    <div class="row">
      <div class="col-lg-12 text-center">
        <h2 class="section-heading">Lorem ipsum dolor sit amet.</h2>
      </div>
    </div>
    <ul class="list-group list-group-flush">
      <li class="list-group-item list-group-item-action">
        Lorem ipsum dolor sit amet.
        <i class="fas fa-check"></i>
      </li>
      <li class="list-group-item list-group-item-action">
        Lorem ipsum dolor sit.
        <i class="fas fa-check"></i>
      </li>
      <li class="list-group-item list-group-item-action">
        Lorem, ipsum dolor.
        <i class="fas fa-check"></i>
      </li>
      <li class="list-group-item list-group-item-action">
        Lorem ipsum dolor sit amet.
        <i class="fas fa-check"></i>
      </li>
      <li class="list-group-item list-group-item-action">
        Lorem, ipsum dolor.
        <i class="fas fa-check"></i>
      </li>
      <li class="list-group-item list-group-item-action">
        Lorem ipsum dolor sit.
        <i class="fas fa-check"></i>
      </li>
      <li class="list-group-item list-group-item-action">
        Lorem ipsum dolor sit amet consectetur.
        <i class="fas fa-check"></i>
      </li>
      <li class="list-group-item list-group-item-action">
        Lorem, ipsum dolor.
        <i class="fas fa-check"></i>
      </li>
      <li class="list-group-item list-group-item-action">
        Lorem ipsum dolor sit amet.
        <i class="fas fa-check"></i>
      </li>
      <li class="list-group-item list-group-item-action">
        Lorem, ipsum dolor.
        <i class="fas fa-check"></i>
      </li>
      <li class="list-group-item list-group-item-action">
        Lorem ipsum, dolor sit amet consectetur adipisicing.
        <i class="fas fa-check"></i>
      </li>
      <li class="list-group-item list-group-item-action">
        Lorem, ipsum dolor.
        <i class="fas fa-check"></i>
      </li>
      <li class="list-group-item list-group-item-action">
        Lorem ipsum dolor sit.
        <i class="fas fa-check"></i>
      </li>
      <li class="list-group-item list-group-item-action">
        Lorem, ipsum.
        <i class="fas fa-check"></i>
      </li>
      <li class="list-group-item list-group-item-action">
        Lorem ipsum dolor sit amet.
        <i class="fas fa-check"></i>
      </li>
    </ul>
  </div>

（运行代码段查看移动设备布局，然后全屏查看较大的设备布局）