Html 为什么我的图像不会扩展到div的全部大小？

我目前正在努力使我的网站响应。我的站点的布局方式是，在桌面版上，它是2列6列并排的，我的站点（一页站点）的每个部分的页面都占据了100%的宽度和高度，也就是1页的大小。为了缩放图像，每个col-6都有100%的高度，同样，我的背景大小设置为100%大小。这对于桌面版本非常有效

问题是，当我缩小到平板电脑或手机时，每半页使用col-12，我将它们堆叠在一起，而不是并排排列，平板电脑上100%大小的图像div太大了，挤压掉了另一个div（因为截面高度只有100%）。而在手机上，它太小了，所以它在图像下显示了一堆空白

我觉得让它正确缩放的唯一方法是不在容器上设置高度，在div中使用img标记而不是背景图像，因为它只会占用所需的空间，而不会占用任何额外的空间。但问题是，现在它没有填满它所在的整个图像分区，在侧面和底部留下空白。我尝试过设置不同的尺寸、设置等，但无论我做什么都无法填满它。它在平板电脑和手机上也有同样的功能。我怎样才能让它工作

桌面上应该是什么样子（这是背景图片）——

桌面上的外观（带img）——

平板电脑（带背景图像）－

片剂（img）－

手机（带背景图像）－

流动电话（img）－

HTML-

<section id="about" ng-controller="aboutController">    
  <div class="container-fluid">

    <div class="row about-row">

      <div class="about-left col-xs-12 col-md-6">
        <img src="assets/images/jay-ocean.jpg" class="col-xs-12"/>
      </div>

      <div class="about-right col-xs-12 col-md-6">
        <div class="about-content">
          <div class="about-content-title">
            <h1><strong>I'M JAY.</strong></h1>
          </div>

          <div class="about-content-info">
            <p ng-if="about.firstParagraph">An entrepenurial minded, Full Stack Developer. Whenever I'm up against a challenge that I care about, it gives me a rush. Focusing on the big picture is important to me, but I never forget the smaller details. Anything that is not challenging is boring, and makes me yawn. Anything that is seemingly impossible interests me a lot. I'm ready to get to work.</p>

            <p ng-if="!about.firstParagraph">Currently seeking a Javascript position, using the MEAN stack, in New York City. Being innovative, ambitious, and hard working are values that are very important to me. I want to join a company that has similar values and has goals of reaching ridiculous levels of success, not just modest realistic ones. I love working with a solid team.</p>
          </div>

          <div class="about-button">
            <button ng-if="about.firstParagraph" class="label label-success" ng-click="about.switchParagraph()">MORE =></button>
            <button ng-if="!about.firstParagraph" class="label label-success"><a href="/portfolio">VIEW SKILLS</a></button>
          </div>

          <div class="about-personal-info">
            <h4>Email: jaybittner@gmail.com</h4>
          </div>

          <div class="about-icon">
            <a href="{{ profile.url }}" ng-repeat="profile in about.profiles"><img ng-src="{{ profile.icon }}" /></a>
          </div>
        </div>

      </div>

    </div>

  </div>
</section>

---

为什么不使用

cover

值设置

background size

属性？

刚刚尝试了这个^。在桌面版上效果很好，但当我看手机或平板电脑时，它无法扩展。下面是它现在在手机上的样子。另一个问题是，如果我使用背景图像，我需要将div height（.about left）设置为100%，当它在平板电脑或手机上时，考虑到图像小于100%，这会破坏设计。我的.about右边的div应该在下面被删除了。如果我把.about左边的大小改为50%，在手机上看起来不错。似乎要用这种方法工作，我需要一种方法，随着屏幕变小，。的百分比将减少。有没有一种动态调整div大小的方法？请访问此链接。

#about {
  height: 100%; 
  width: 100%;
  background: rgba(0,97,65,1);
  background: -moz-linear-gradient(left, rgba(0,97,65,1) 0%, rgba(54,135,95,1) 7%, rgba(36,123,85,1) 22%, rgba(0,97,65,1) 53%, rgba(34,121,84,1) 76%, rgba(54,135,95,1) 90%, rgba(54,135,95,1) 100%);
  background: -webkit-gradient(left top, right top, color-stop(0%, rgba(0,97,65,1)), color-stop(7%, rgba(54,135,95,1)), color-stop(22%, rgba(36,123,85,1)), color-stop(53%, rgba(0,97,65,1)), color-stop(76%, rgba(34,121,84,1)), color-stop(90%, rgba(54,135,95,1)), color-stop(100%, rgba(54,135,95,1)));
  background: -webkit-linear-gradient(left, rgba(0,97,65,1) 0%, rgba(54,135,95,1) 7%, rgba(36,123,85,1) 22%, rgba(0,97,65,1) 53%, rgba(34,121,84,1) 76%, rgba(54,135,95,1) 90%, rgba(54,135,95,1) 100%);
  background: -o-linear-gradient(left, rgba(0,97,65,1) 0%, rgba(54,135,95,1) 7%, rgba(36,123,85,1) 22%, rgba(0,97,65,1) 53%, rgba(34,121,84,1) 76%, rgba(54,135,95,1) 90%, rgba(54,135,95,1) 100%);
  background: -ms-linear-gradient(left, rgba(0,97,65,1) 0%, rgba(54,135,95,1) 7%, rgba(36,123,85,1) 22%, rgba(0,97,65,1) 53%, rgba(34,121,84,1) 76%, rgba(54,135,95,1) 90%, rgba(54,135,95,1) 100%);
  background: linear-gradient(to right, rgba(0,97,65,1) 0%, rgba(54,135,95,1) 7%, rgba(36,123,85,1) 22%, rgba(0,97,65,1) 53%, rgba(34,121,84,1) 76%, rgba(54,135,95,1) 90%, rgba(54,135,95,1) 100%);
  filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#006141', endColorstr='#36875f', GradientType=1 );
  background-repeat: no-repeat;
  color: #101010;
}

/*#about .container-fluid, #about .row {
  height: 100%;
}*/

/*.about-left {
  height: 100%;
  background-image: url('../../images/jay-ocean.jpg'); 
  background-repeat: no-repeat;
  background-size: 110%;
  border-right: 3px solid #101010;
  border-bottom: 3px solid black;
}*/

/*.about-left img {
  height: 100%;
  width: 100%;
  object-fit: fill;
}*/

.about-right {
  padding-top: 24vh;
  padding-left: 3.4vw;
  text-align: center;
}

.about-content {
  width: 50%;
  margin-left: auto;
  margin-right: auto;
}

.about-content-title {
  padding-bottom: -30px;
}

.about-content-title h1{
  font-size: 3.1vw;
  margin: 3px;
}

.about-content-info p {
  font-size: 1vw;
  word-spacing: 0.3vw;
}

.about-button button {
  color: gray;
  border: 1px solid #101010;
  background-color: #101010;
  font-size: 0.7vw;
}

.about-button a {
  color: gray;
}

.about-personal-info h4 {
  font-size: 1vw;
  word-spacing: 0.3vw;
}

.about-icon img {
  height: 3.5vh;
  width: 1.75vw;
  border-radius: 10px;
  border: 1px solid #101010;
  margin: 3px;
}