html - 我尝试验证我的 css 文件，但找不到将网格布局调整为平板电脑大小的问题

问题描述

抱歉，我是 HTML/CSS 新手。我有一个 CSS 文件，我相信它可以正常工作，除了我无法弄清楚为什么我从大屏幕调整到中屏幕到小屏幕的大小不起作用。它从一行中的 3 个框跳到一列中的 3 个框。我试图将中等屏幕的大小调整为顶部的 2 个较小的框，底部的 1 个较大的框。对不起，如果这是一个不好的问题。我将发布我的 css 文件，我不相信它是 HTML 文件。感谢您的帮助

      * {
  box-sizing: border-box;
}

h1 {
  color: black;
  text-align: center;
}

h2 {
  color: black;
  border: 1px solid black;
  float: right;
  position: relative;
  top: -26px;
  left: 21px;
  width: 150px;
}

section {
  color: black;
  text-align: center;
  background: grey;
  border: 1px solid black;
  height: 100%;
  width: 85%;
  font-family: sans-serif;
  padding: 5px 20px 5px 20px;
  margin-top: 5%;
  margin-left: 16px;
  position: relative;
}

p {
  position: relative;
  bottom: 30px;
  clear: right;
}

#Chicken {
  background-color: salmon;
}

#Beef {
  background-color: red;
}

#Sushi {
  background-color: green;
}

@media (min-width: 992px) {
  .col-lg-1,
  .col-lg-2,
  .col-lg-3,
  .col-lg-4,
  .col-lg-5,
  .col-lg-6,
  .col-lg-7,
  .col-lg-8,
  .col-lg-9,
  .col-lg-10,
  .col-lg-11,
  .col-lg-12 {
    float: left;
  }
  .col-lg-1 {
    width: 8.33%
  }
  .col-lg-2 {
    width: 16.66%
  }
  .col-lg-3 {
    width: 25%
  }
  .col-lg-4 {
    width: 33.33%
  }
  .col-lg-5 {
    width: 41.66%
  }
  .col-lg-6 {
    width: 50%
  }
  .col-lg-7 {
    width: 58.33%
  }
  .col-lg-8 {
    width: 66.66%
  }
  .col-lg-9 {
    width: 74.99%
  }
  .col-lg-10 {
    width: 83.33%
  }
  .col-lg-11 {
    width: 91.66%
  }
  .col-lg-12 {
    width: 100%
  }
  @media (min-width: 768px) and (max-width: 991px) {
    .col-md-1,
    .col-md-2,
    .col-md-3,
    .col-md-4,
    .col-md-5,
    .col-md-6,
    .col-md-7,
    .col-md-8,
    .col-md-9,
    .col-md-10,
    .col-md-11,
    .col-md-12 {
      float: left;
    }
    .col-md-1 {
      width: 8.33%
    }
    .col-md-2 {
      width: 16.66%
    }
    .col-md-3 {
      width: 25%
    }
    .col-md-4 {
      width: 33.33%
    }
    .col-md-5 {
      width: 41.66%
    }
    .col-md-6 {
      width: 50%
    }
    .col-md-7 {
      width: 58.33%
    }
    .col-md-8 {
      width: 66.66%
    }
    .col-md-9 {
      width: 74.99%
    }
    .col-md-10 {
      width: 83.33%
    }
    .col-md-11 {
      width: 91.66%
    }
    .col-md-12 {
      width: 100%
    }
    @media (max-width: 767px) {
      .col-sm-1,
      .col-sm-2,
      .col-sm-3,
      .col-sm-4,
      .col-sm-5,
      .col-sm-6,
      .col-sm-7,
      .col-sm-8,
      .col-sm-9,
      .col-sm-10,
      .col-sm-11,
      .col-sm-12 {
        float: left;
      }
      .col-sm-1 {
        width: 8.33%
      }
      .col-sm-2 {
        width: 16.66%
      }
      .col-sm-3 {
        width: 25%
      }
      .col-sm-4 {
        width: 33.33%
      }
      .col-sm-5 {
        width: 41.66%
      }
      .col-sm-6 {
        width: 50%
      }
      .col-sm-7 {
        width: 58.33%
      }
      .col-sm-8 {
        width: 66.66%
      }
      .col-sm-9 {
        width: 74.99%
      }
      .col-sm-10 {
        width: 83.33%
      }
      .col-sm-11 {
        width: 91.66%
      }
      .col-sm-12 {
        width: 100%
      }

<!DOCTYPE html>
<html>

<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>module2-solution css</title>
</head>

<body>
  <h1>Our Menu</h1>
  <div class="col-lg-4 col-md-6 col-sm-12">
    <section>
      <h2 id="Chicken">Chicken</h2>
      <p>Heat the olive oil in a small, non-stick pan over medium heat. Crack the egg directly into the pan and season generously with salt and pepper. Cook for about two minutes, then use a spatula to flip the egg, being careful not to break the yolk. For
        a runny yolk, turn off the heat and let the egg sit for one minute.</p>
    </section>
  </div>
  <div class="col-lg-4 col-md-6 col-sm-12">
    <section>
      <h2 id="Beef">Beef</h2>
      <p>Heat the olive oil in a small, non-stick pan over medium heat. Crack the egg directly into the pan and season generously with salt and pepper. Cook for about two minutes, then use a spatula to flip the egg, being careful not to break the yolk. For
        a runny yolk, turn off the heat and let the egg sit for one minute.</p>
    </section>
  </div>
  <div class="col-lg-4 col-md-6 col-sm-12">
    <section>
      <h2 id="Sushi">Sushi</h2>
      <p>Heat the olive oil in a small, non-stick pan over medium heat. Crack the egg directly into the pan and season generously with salt and pepper. Cook for about two minutes, then use a spatula to flip the egg, being careful not to break the yolk. For
        a runny yolk, turn off the heat and let the egg sit for one minute.</p>
    </section>
  </div>
</body>

</html>

标签： htmlcss

html - 我尝试验证我的 css 文件，但找不到将网格布局调整为平板电脑大小的问题

问题描述

解决方案

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