如何让Accordion Content从下到上扩展？

Question

如何让手风琴内容从下到上扩展？ 基本上这里的主题是我建立一个网站，我想在一个区域（一个div）这个手风琴，但我想把它放在页面的底部，然后当我按下特定的按钮（目前正在工作！）扩展不像经典的方式，但到顶部。因为我是大学一年级学生，这是我的第二个网站，我只是想把它变成光线，所以不需要jquery或复杂的东西，我不明白！

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article.accordion {
  display: block;
  width: 650px;
  padding: 0.5em 0.5em 1px 0.5em;
  margin: 0 auto;
  background-color: #666;
  box-shadow: 0 3px 3px rgba(0, 0, 0, 0.3);
}
article.accordion section {
  display: block;
  width: 615px;
  height: 30px;
  padding: 0 1em;
  margin: 0 0 0.5em 0;
  color: #333;
  background-color: #333;
  overflow: hidden;
}
article.accordion section h2 {
  font-size: 1em;
  font-weight: bold;
  width: 100%;
  line-height: 2em;
  padding: 0;
  margin: 0;
  color: #ddd;
}
article.accordion section h2 a {
  display: block;
  width: 100%;
  line-height: 2em;
  text-decoration: none;
  color: inherit;
  outline: 0 none;
}
article.accordion section,
article.accordion section h2 {
  -webkit-transition: all 1s ease;
  -moz-transition: all 1s ease;
  -ms-transition: all 1s ease;
  -o-transition: all 1s ease;
  transition: all 1s ease;
}
article.accordion section:target {
  height: 450px;
  background-color: #fff;
}
article.accordion section:target h2 {
  font-size: 1.6em;
  color: #333;
}

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<div id="tab"></div>
<div id="connect">
  <p>
    <img src="images/Steam Dial.png" width="88" height="29">
  </p>
</div>
<div id="apDiv2">
  <article class="accordion">
    <section id="acc1">
      <h2>Games</h2>
      <p>This content appears on page 1.</p>
    </section>
    <section id="acc2">
      <h2>Software</h2>
      <p>This content appears on page 2.</p>
    </section>
    <section id="acc3">
      <h2>Hardware</h2>
      <p>This content appears on page 3.</p>
    </section>
  </article>
</div>

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