@alicloud/cloud-charts/es/common/arrow/index.css


.cloud-warrow:before {
  content: "";
  display: inline-block;
  width: 0;
  height: 0;
  vertical-align: baseline;
  border: 8px solid transparent;
  border-right-width: 5px;
  border-left-width: 5px;
}
.cloud-warrow.cloud-warrow-up:before {
  border-bottom-color: currentColor;
}
.cloud-warrow.cloud-warrow-down:before {
  position: relative;
  top: 8px;
  border-top-color: currentColor;
}