border-inline-start

border-inline-start: solid;
writing-mode: horizontal-tb;

border-inline-start: dashed red;
writing-mode: vertical-rl;

border-inline-start: 1rem solid;
writing-mode: horizontal-tb;
direction: rtl;

<section class="default-example" id="default-example">
  <div class="transition-all" id="example-element">
    This is a box with a border around it.
  </div>
</section>

#example-element {
  background-color: #eee;
  color: #8b008b;
  padding: 0.75em;
  width: 80%;
  height: 100px;
  unicode-bidi: bidi-override;
}

border-inline-start: 1px;
border-inline-start: 2px dotted;
border-inline-start: medium dashed green;

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

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

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

.exampleText {
  writing-mode: vertical-rl;
  border-inline-start: 5px dashed blue;
}