sass/components/_input-group.scss
.#{$prefix}input-group {
  display: table;
  border-collapse: separate;
  height: $input-group-height;
  line-height: $input-group-height;
  input, button {
    padding-top: 0;
    padding-bottom: 0;
    line-height: $input-group-height;
  }
  input:not([type="button"]) {
    border-radius: 0;
    float: left;
    width: 100%;
    height: $input-group-input-height;
    display: table-cell;
    color: $input-group-color;
    &:last-child {
      border-top-right-radius: $input-group-border-radius;
      border-bottom-right-radius: $input-group-border-radius;
    }
    &:first-child {
      border-top-left-radius: $input-group-border-radius;
      border-bottom-left-radius: $input-group-border-radius;
    }
  }

  .#{$prefix}input-group-addon, .#{$prefix}input-group-btn {
    vertical-align: middle;
    display: table-cell;
  }
  .#{$prefix}input-group-addon {
    padding:$input-group-padding;
    font-size: $input-group-font-size;
    color: $input-group-addon-color;
    background-color: $input-group-addon-bg;
    border: $input-group-addon-bd;
    border-radius: $input-group-border-radius;
    &:first-child {
      border-right: 0;
      border-top-right-radius: 0;
      border-bottom-right-radius: 0;
    }
    &:last-child {
      border-left: 0;
      border-top-left-radius: 0;
      border-bottom-left-radius: 0;
      padding-right: $input-group-padding-right;
    }
  }

  .#{$prefix}input-group-btn {
    .dxy-btn{
      color: $input-group-btn-color;
    }
    &:last-child .dxy-btn {
      border-top-left-radius: 0;
      border-bottom-left-radius: 0;
      margin-left: -2px;
    }
    &:first-child .dxy-btn {
      border-top-right-radius: 0;
      border-bottom-right-radius: 0;
      margin-right: -2px;
    }

  }
}
