问顶部和底部边框颜色消失在特定的边界半径上。

EN

.border {
  width: 300px;
  height: 300px;
  border-block: solid 20px #012345;
  border-inline: solid 30px #f00;
  border-start-start-radius: 24px;
  border-start-end-radius: 50%;
  border-end-start-radius: 100%;
  border-end-end-radius: 32.3px; /* decrease this value to reproduce the error */
}

.border2 {
  width: 300px;
  height: 300px;
  border-top: solid 20px #012345;
  border-bottom: solid 20px #012345;
  border-left: solid 30px #f00;
  border-right: solid 30px #f00;
  border-top-left-radius: 24px;
  border-top-right-radius: 50%;
  border-bottom-left-radius: 100%;
  border-bottom-right-radius: 32.3px; /* decrease this value to reproduce the error */
}

<div class="border">border logical</div>
<div class="border2">border physical</div>