inset-block

inset-block: 10px 20px;
writing-mode: horizontal-tb;

inset-block: 20px 40px;
writing-mode: vertical-rl;

inset-block: 5% 20%;
writing-mode: horizontal-tb;

inset-block: 1rem auto;
writing-mode: vertical-lr;

<section id="default-example">
  <div class="example-container">
    <div id="example-element">I am absolutely positioned.</div>
    <p>
      As much mud in the streets as if the waters had but newly retired from the
      face of the earth, and it would not be wonderful to meet a Megalosaurus,
      forty feet long or so, waddling like an elephantine lizard up Holborn
      Hill.
    </p>
  </div>
</section>

.example-container {
  border: 0.75em solid #ad1457;
  padding: 0.75em;
  text-align: left;
  position: relative;
  width: 100%;
  min-height: 200px;
}

#example-element {
  background-color: #07136c;
  border: 6px solid #ffa000;
  color: white;
  position: absolute;
  inset: 0;
}

/* 长度值 */
inset-block: 3px 10px;
inset-block: 2.4em 3em;
inset-block: 10px; /* 应用于块首和块末 */

/* 包含块的宽度或高度的百分比 */
inset-block: 10% 5%;

/* 关键词值 */
inset-block: auto;

/* 全局值 */
inset-block: inherit;
inset-block: initial;
inset-block: revert;
inset-block: revert-layer;
inset-block: unset;

<div>
  <p class="exampleText">示例文本</p>
</div>

div {
  background-color: yellow;
  width: 120px;
  height: 120px;
}

.exampleText {
  writing-mode: vertical-lr;
  position: relative;
  inset-block: 20px 50px;
  background-color: #c8c800;
}