如何设置嵌套块 html 的第一段样式？

Answer 1

:nth-of-type

伪类应该做到这一点：

section:nth-of-type(2) > p:nth-of-type(1) {
  background: red;
}

<section>
  <img src="" alt="" />
</section>

<section>
  <p>//something 1</p>
  <img src="" alt="" />
  <p>//something 2</p>
  <p>//something 3</p>
</section>

<section>
  <img src="" alt="" />
</section>

<section>
  <p>//something 4</p>
  <p>//something 5</p>
</section>