<p class="support">⚠️ Your browser does not support the CSS <code>:has()</code> selector so this demo won't work. Please try Safari TP 137.</p>

<figure>
  <figcaption>CSS Pseudo-Class Specification</figcaption>
  <img src="https://picsum.photos/1240/?random=11" alt="">
</figure>

<figure>
  <div class="media">
    <img src="https://picsum.photos/1240/?random=12" alt="">
  </div>
  <figcaption>CSS Pseudo-Class Specification</figcaption>
</figure>

<figure>
  <img src="https://picsum.photos/1240/?random=13" alt="">
  <figcaption>CSS Pseudo-Class Specification</figcaption>
</figure>

@import url("https://fonts.googleapis.com/css2?family=Exo:wght@600&display=swap");

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  width: 100vw;
  min-height: 100vh;
  font-family: "Exo", Arial, sans-serif;
  background-color: #557;
  display: grid;
  gap: 1.25rem;
  place-content: center;
  font-size: clamp(1.5rem, 2vw + 1rem, 2.25rem);
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr));
  line-height: 1.5;
}

:where(img) {
  max-width: 100%;
  height: auto;
  vertical-align: top;
}

figure {
  background-color: #f4f4f4;
  border-radius: 16px;
  font-size: 1.25rem;
  margin: 0;
  overflow: hidden;
  color: #000;
}

figcaption {
  padding: 1rem 1.25rem;
  margin: 0;
}

/* 匹配包含<figcaption>后代元素的<figure>元素 */
figure:has(figcaption) {
  background-color: #3f51b5;
  color: #fff;
}

/* 匹配包含<img>子元素的<figure>元素 */
figure:has(> img) {
  background-color: #009688;
  color: #fff;
}

/* 匹配包含<img>后代元素的<figure>元素 */
figure:has(img) {
  background-color: #9c27b0;
  color: #fff;
}

/* 匹配包含<img>后面有 <figcaption>元素的<figure>元素 */
figure:has(img + figcaption) {
  background-color: #607d8b;
  color: #fff;
}

.support {
  color: #842029;
  background-color: #f8d7da;
  padding: 1rem 1rem;
  border: 1px solid #f5c2c7;
  border-radius: 0.25rem;
  font-size: 1rem;
  grid-column: 1 / -1;
}

@supports (selector(:has(*))) {
  .support {
    display: none;
  }
}