<blockquote>：块级引用元素

<div>
  <blockquote cite="https://www.huxley.net/bnw/four.html">
    <p>
      Words can be like X-rays, if you use them properly—they’ll go through
      anything. You read and you’re pierced.
    </p>
  </blockquote>
  <p>—Aldous Huxley, <cite>Brave New World</cite></p>
</div>

div:has(> blockquote) {
  background-color: #ededed;
  margin: 10px auto;
  padding: 15px;
  border-radius: 5px;
}

blockquote p::before {
  content: "\201C";
}

blockquote p::after {
  content: "\201D";
}

blockquote + p {
  text-align: right;
}

<blockquote cite="https://tools.ietf.org/html/rfc1149">
  <p>
    Avian carriers can provide high delay, low throughput, and low altitude
    service. The connection topology is limited to a single point-to-point path
    for each carrier, used with standard carriers, but many carriers can be used
    without significant interference with each other, outside of early spring.
    This is because of the 3D ether space available to the carriers, in contrast
    to the 1D ether used by IEEE802.3. The carriers have an intrinsic collision
    avoidance system, which increases availability.
  </p>
</blockquote>