ant-design/components/steps/style/progress.less

@progress-prefix-cls: ~'@{ant-prefix}-progress';

.@{steps-prefix-cls}:not(.@{steps-prefix-cls}-dot):not(.@{steps-prefix-cls}-navigation) {
  &:not(.@{steps-prefix-cls}-vertical) {
    .@{steps-prefix-cls}-item {
      padding-top: 4px;
    }
  }
  .@{steps-prefix-cls}-item {
    .@{steps-prefix-cls}-item-icon {
      position: relative;
      .@{progress-prefix-cls} {
        position: absolute;
        top: -5px;
        right: -5px;
        bottom: -5px;
        left: -5px;
      }
    }
  }
}