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Question

我无法让这些数字居中。它们在一个部分内，我尝试了很多变化。一切都是应有的，它们以正确的方式漂浮。但无论我如何尝试使用这些部分或图形代码，它们仍然不在这些部分的中心。

section {
  width: 100%;
  padding: 1rem;
  display: table;
  margin: 0 auto;
  max-width: none;
  background-color: #373B44;
  height: 100vh;
}

section:nth-of-type(2n) {
  background-color: white;
}

figure.snip1165 {
  float: left;
  margin: 1rem;
  overflow: hidden;
  min-width: 150px;
  max-width: 300px;
  background: #000000;
  color: #333;
  text-align: left;
  box-shadow: 0 0 5px rgba(0, 0, 0, 0.15);
}

<section>

  <figure class="snip1165">
    <img src="http://test.nationalparkpaws.com/images/camping%20in%20mountains%20with%20ten.jpg" />
    <figcaption>
      <h3>Useful Tips</h3>
      <p>
        Sometimes I think the surest sign that intelligent life exists elsewhere in the universe is that none of it has tried to contact us.
      </p>

    </figcaption>
  </figure>

  <figure class="snip1165 red">
    <img src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/331810/sample63.jpg" alt="sample63" />
    <figcaption>
      <h3>Caspian<span> Bellevedere</span></h3>
      <p>
        I don't need to compromise on my principles, because they don't have the slightest bearing on what happens to me anyway.
      </p>

    </figcaption>
  </figure>
  <figure class="snip1165 orange">
    <img src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/331810/sample64.jpg" alt="sample64" />
    <figcaption>
      <h3>Parsley<span> Montana</span></h3>
      <p>
        That's the problem with nature, something's always stinging you or oozing mucous all over you. Hobbes, I think it is time you and me when and watched some TV.
      </p>

    </figcaption>
  </figure>

</section>

Answer 1

在section 上使用text-align: center; 并在figure 上删除float: left; 并改用display: inline-block; and vertical-align: top;。

应该做的伎俩，见下面sn-p：

section {
  width: 100%;
  padding: 1rem;
  display: table;
  margin: 0 auto;
  max-width: none;
  background-color: #373B44;
  height: 100vh;
  text-align: center;
}

section:nth-of-type(2n) {
  background-color: white;
}

figure.snip1165 {
  display: inline-block;
  vertical-align: top;
  margin: 1rem;
  overflow: hidden;
  min-width: 150px;
  max-width: 300px;
  background: #000000;
  color: #333;
  text-align: left;
  box-shadow: 0 0 5px rgba(0, 0, 0, 0.15);
}

<section>  
  <figure class="snip1165">
    <img src="http://test.nationalparkpaws.com/images/camping%20in%20mountains%20with%20ten.jpg"/>
    <figcaption>
      <h3>Useful Tips</h3>
      <p>
        Sometimes I think the surest sign that intelligent life exists elsewhere in the universe is that none of it has tried to contact us.
      </p>
    </figcaption>
  </figure>

  <figure class="snip1165 red">
    <img src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/331810/sample63.jpg" alt="sample63"/>
    <figcaption>
      <h3>Caspian<span> Bellevedere</span></h3>
      <p>
        I don't need to compromise on my principles, because they don't have the slightest bearing on what happens to me anyway.
      </p>    
    </figcaption>
  </figure>
  
  <figure class="snip1165 orange">
    <img src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/331810/sample64.jpg" alt="sample64"/>
    <figcaption>
      <h3>Parsley<span> Montana</span></h3>
      <p>
        That's the problem with nature, something's always stinging you or oozing mucous all over you. Hobbes, I think it is time you and me when and watched some TV.
      </p>
    </figcaption>
  </figure>  
</section>