css/jquery-16x9纵横比图像-匹配div维度

.image1 {
  position: relative;
  padding-bottom: 56.2%;
}

.image1 img {
 position: absolute;
  object-fit: cover;
  width: 100%;
  height: 100%;
}

.image2 {
  background:lightgreen;
}

.image3 {
  background:lightgrey;
}

<div class="container">

  <div class="image1">
    <img src="https://upload.wikimedia.org/wikipedia/commons/thumb/8/81/2012_Suedchinesischer_Tiger.JPG/1200px-2012_Suedchinesischer_Tiger.JPG" />
  </div>

  <div class="image2">
   Section 2
  </div>

  <div class="image3">
  Section 3
  </div>

</div>