调整浏览器窗口大小时调整div的大小

Question

我有3个div。每个都低于另一个。每个'应该'调整浏览器窗口大小时调整大小，但只有最后一个正确调整大小。

div#content {
  height: 100%;
  width: 100%;
  position: relative;
  background-size: cover;
  background-color: pink;
  font-family: arial;
}

div#block-wrapper {
  min-height: 300px;
  min-width: 100px;
  background-color: orange;
}

div.group {
  border: 1px solid black;
  position: absolute;
  width: 100%;
  background-color: lightgreen;
}

div.heading {
  font-size: 2em;
  position: absolute;
  margin: 50px 0px 50px 50px;
  line-height: 50px;
  width: 250px;
  height: 50px;
  background-color: black;
}

div.heading h4 {
  color: white;
  position: relative;
  margin: 0px 0px 0px 25px;
}

div.content {
  margin: 150px auto;
}

div.bar {
  margin: 25px 25px 25px 25px;
  float: left;
  position: relative;
  width: 200px;
  height: 20px;
  background-color: darkgrey;
}

<div id="content">
  <div id="block-wrapper">
    <div class="group">
      <div class="heading">
        <h4>Level 1</h4>
      </div>
      <div class="content">
        <div class="bar"></div>
        <div class="bar"></div>
        <div class="bar"></div>
        <div class="bar"></div>
        <div class="bar"></div>
        <div class="bar"></div>
        <div class="bar"></div>
        <div class="bar"></div>
        <div class="bar"></div>
      </div>
    </div>
  </div>
  <div id="block-wrapper">
    <div class="group">
      <div class="heading">
        <h4>Level 2</h4>
      </div>
      <div class="content">
        <div class="bar"></div>
        <div class="bar"></div>
        <div class="bar"></div>
        <div class="bar"></div>
        <div class="bar"></div>
        <div class="bar"></div>
        <div class="bar"></div>
        <div class="bar"></div>
        <div class="bar"></div>
      </div>
    </div>
  </div>
  <div id="block-wrapper">
    <div class="group">
      <div class="heading">
        <h4>Level 3</h4>
      </div>
      <div class="content">
        <div class="bar"></div>
        <div class="bar"></div>
        <div class="bar"></div>
        <div class="bar"></div>
        <div class="bar"></div>
        <div class="bar"></div>
        <div class="bar"></div>
        <div class="bar"></div>
        <div class="bar"></div>

      </div>
    </div>
  </div>
</div>

Answer 1

通过改变位置来修复：绝对到位置：相对并使每个组浮动：左