nutui/src/packages/stepper/stepper.scss

.nut-stepper {
  border: 1px solid #dedede;
  .nut-stepper-fake,
  .nut-stepper-fake- {
    background: #fff;
    div {
      background: #fff;
    }
  }
  span {
    &:first-child {
      border-right: 1px solid #dedede;
    }
    &:last-child {
      border-left: 1px solid #dedede;
    }
  }
}
.nut-stepper-simple {
  span {
    font-weight: bold;
  }
  input {
    background: #f6f6f6;
  }
  .nut-stepper-fake,
  .nut-stepper-fake- {
    background: #f6f6f6;
    div {
      background: #f6f6f6;
    }
  }
}
.nut-stepper,
.nut-stepper-simple {
  width: 100px;
  height: 30px;
  line-height: 30px;
  display: flex;
  border-radius: 4px;
  position: relative;
  overflow: hidden;
  .nut-stepper-none-transition {
    transition: none;
  }
  .nut-stepper-transition {
    transition: all 0.4s;
  }
  .nut-stepper-fake,
  .nut-stepper-fake- {
    position: absolute;
    top: 0;
    left: 25%;
    right: 25%;
    bottom: 0;
    text-align: center;
    font-size: 13px;
  }
  span {
    color: #666;
    width: 25%;
    text-align: center;
    cursor: pointer;
    padding: 0;
    box-sizing: border-box;
    -webkit-user-select: none;
    user-select: none;
    display: flex;
    align-items: center;
    justify-content: center;
    svg {
      vertical-align: top;
      width: $stepperbar-width;
      fill: $stepperbar-color;
    }
  }
  input {
    border: none;
    width: 50%;
    text-align: center;
    border-radius: 0;
    padding: 0;
    appearance: none;
    box-sizing: border-box;
    outline: none;
    font-family: initial;
    color: $stepper-color;
  }
  .nut-stepper-grey {
    color: #ececee;
    svg {
      vertical-align: top;
      fill: #cecece !important;
    }
  }
}