nutui/src/packages/steps/steps.scss

.clearfix {
  zoom: 1
}

.clearfix:after {
  display: block;
  height: 0;
  clear: both;
  content: "";
  visibility: hidden;
}

.nut-steps {}

.nut-step {
  position: relative;
  font-size: 14px;
  color: #999;

  .nut-step-line {
    position: absolute;
    top: 0;
    left: 14px;
    height: 100%;
    width: 1px;

  }

  .nut-step-index {
    position: relative;
    z-index: 99;
    float: left;
    width: 26px;
    height: 26px;
    font-size: 14px;
    line-height: 26px;
    text-align: center;
    border-radius: 50%;
  }

  .nut-step-main {
    padding-left: 40px;

    .nut-step-title {
      line-height: 28px;
      font-weight: 600;
    }

    .nut-step-content {
      padding-bottom: 10px;
      line-height: 20px;
      font-size: 12px;
    }
  }

  &.nut-step-last {
    .nut-step-line {
      display: none;
    }
  }

  &.nut-step-status- {
    &wait {
      .nut-step-line {
        background: #ccc;
      }

      .nut-step-index {
        color: #999;
        border: 1px solid #ccc;
        background: #ffffff;
      }
    }

    &finish {
      .nut-step-line {
        background: mix($primary-color , #0f0, 50%);
      }

      .nut-step-index {
        border: 1px solid mix($primary-color , #0f0, 50%);
        background: #ffffff;
        color: mix($primary-color , #0f0, 50%);
      }
    }

    &process {
      .nut-step-line {
        background: #ccc;
      }

      .nut-step-main {
        color: #666;
      }

      .nut-step-index {
        border: 1px solid mix($primary-color , #0f0, 50%);
        background: mix($primary-color , #0f0, 50%);
        color: #ffffff;
      }
    }

    &error {
      .nut-step-line {
        background: #ccc;
      }

      .nut-step-main {
        color: $primary-color;
      }

      .nut-step-index {
        border: 1px solid $primary-color;
        background: #ffffff;
        color: $primary-color; 
      }
    }
  }
}