padding-inline

padding-inline: 5% 10%;
writing-mode: horizontal-tb;

padding-inline: 15px 40px;
writing-mode: vertical-rl;

padding-inline: 5% 20%;
writing-mode: horizontal-tb;
direction: rtl;

<section id="default-example">
  <div class="transition-all" id="example-element">
    <div class="box">
      Far out in the uncharted backwaters of the unfashionable end of the
      western spiral arm of the Galaxy lies a small unregarded yellow sun.
    </div>
  </div>
</section>

#example-element {
  border: 10px solid #ffc129;
  overflow: hidden;
  text-align: left;
}

.box {
  border: dashed 1px;
  unicode-bidi: bidi-override;
}

/* <length> 值 */
padding-inline: 10px 20px; /* 绝对长度 */
padding-inline: 1em 2em; /* 相对于文本尺寸 */
padding-inline: 10px; /* 同时设置行首和行末值 */

/* <percentage> 值 */
padding-inline: 5% 2%; /* 相对于最近包含区块的宽度 */

/* 全局值 */
padding-inline: inherit;
padding-inline: initial;
padding-inline: revert;
padding-inline: revert-layer;
padding-inline: unset;

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

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

.exampleText {
  writing-mode: vertical-rl;
  padding-inline: 20px 40px;
  background-color: #c8c800;
}