CSS Flexbox实战：解决Div元素自动换行与实现并排布局

<!-- 原始的HTML结构示例 (导致换行) -->
<div class="center">
  <div class="property-card">...</div>
</div>

<div class="center">
  <div class="property-card">...</div>
</div>

<div class="center">
  <div class="property-card">...</div>
</div>

<div class="center">
  <!-- 所有property-card都作为这一个.center的直接子元素 -->
  <div class="property-card">
    <div class="property-image">
      <div class="property-image-title"></div>
    </div>
    <div class="property-description">
      <h3> Leadership </h3>
      <p>Grow your leadership skills in this team.</p>
    </div>
  </div>

  <div class="property-card">
    <div class="property-image2">
      <div class="property-image-title"></div>
    </div>
    <div class="property-description">
      <h3> Environment </h3>
      <p>Help our blue planet become a better place to live in.</p>
    </div>
  </div>

  <div class="property-card">
    <div class="property-image3">
      <div class="property-image-title"></div>
    </div>
    <div class="property-description">
      <h3> People </h3>
      <p>Help other people that deserve better lives get better lives.</p>
    </div>
  </div>
</div>

* {
  -webkit-box-sizing: border-box;
  box-sizing: border-box;
}

/* 关键的Flexbox容器样式 */
.center {
  width: 100%;
  display: flex; /* 将此元素设置为Flex容器 */
  flex-direction: row; /* 显式指定子元素水平排列（默认值） */
  /* 可以添加justify-content和align-items来控制对齐 */
  /* 例如：justify-content: space-around; */
  /* 如果希望项目在空间不足时换行，可以添加 flex-wrap: wrap; */
}

/* property-card 样式保持不变，它们现在是Flex项目 */
.property-card {
  margin: 10px;
  height: 18em;
  width: 14em;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -ms-flex-direction: column;
  flex-direction: column;
  position: relative;
  -webkit-transition: all 0.4s cubic-bezier(0.645, 0.045, 0.355, 1);
  -o-transition: all 0.4s cubic-bezier(0.645, 0.045, 0.355, 1);
  transition: all 0.4s cubic-bezier(0.645, 0.045, 0.355, 1);
  border-radius: 16px;
  overflow: hidden;
  -webkit-box-shadow: 15px 15px 27px #e1e1e3, -15px -15px 27px #ffffff;
  box-shadow: 15px 15px 27px #e1e1e3, -15px -15px 27px #ffffff;
}

/* 其他 .property-image, .property-description 等样式保持不变 */
.property-image {
  height: 6em;
  width: 14em;
  padding: 1em 2em;
  position: Absolute;
  top: 0px;
  -webkit-transition: all 0.4s cubic-bezier(0.645, 0.045, 0.355, 1);
  -o-transition: all 0.4s cubic-bezier(0.645, 0.045, 0.355, 1);
  transition: all 0.4s cubic-bezier(0.645, 0.045, 0.355, 1);
  background-image: url('pic/leader.png');
  background-size: cover;
  background-repeat: no-repeat;
}

.property-image2 {
  height: 6em;
  width: 14em;
  padding: 1em 2em;
  position: Absolute;
  top: 0px;
  -webkit-transition: all 0.4s cubic-bezier(0.645, 0.045, 0.355, 1);
  -o-transition: all 0.4s cubic-bezier(0.645, 0.045, 0.355, 1);
  transition: all 0.4s cubic-bezier(0.645, 0.045, 0.355, 1);
  background-image: url('pic/globe-icon.svg');
  background-size: cover;
  background-repeat: no-repeat;
}

.property-image3 {
  height: 6em;
  width: 14em;
  padding: 1em 2em;
  position: Absolute;
  top: 0px;
  -webkit-transition: all 0.4s cubic-bezier(0.645, 0.045, 0.355, 1);
  -o-transition: all 0.4s cubic-bezier(0.645, 0.045, 0.355, 1);
  transition: all 0.4s cubic-bezier(0.645, 0.045, 0.355, 1);
  background-image: url('pic/helping-hand-icon-png-23.png');
  background-size: cover;
  background-repeat: no-repeat;
}

.property-description {
  background-color: #FAFAFC;
  height: 12em;
  width: 14em;
  position: absolute;
  bottom: 0em;
  -webkit-transition: all 0.4s cubic-bezier(0.645, 0.045, 0.355, 1);
  -o-transition: all 0.4s cubic-bezier(0.645, 0.045, 0.355, 1);
  transition: all 0.4s cubic-bezier(0.645, 0.045, 0.355, 1);
  padding: 0.5em 1em;
  text-align: center;
}

.property-card:hover .property-description {
  height: 0em;
  padding: 0px 1em;
}
.property-card:hover .property-image,
.property-image2,
.property-image3 {
  height: 18em;
}

.property-card:hover .property-social-icons:hover {
  background-color: blue;
  cursor: pointer;
}