.#{$ns}Transfer {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  min-height: px2rem(300px);
  position: relative;

  &-searchbox {
    width: 100%;
  }

  &--inline {
    display: inline-flex;
    flex-wrap: nowrap;
  }

  &-title {
    display: flex;
    align-items: center;
    background: var(--transfer-base-title-bg);
    color: var(--transfer-base-title-color);
    line-height: var(--transfer-base-title-lineHeight);
    font-size: var(--transfer-base-title-fontSize);
    font-weight: var(--transfer-base-title-fontWeight);
    font-family: var(--transfer-base-title-font-family);
    padding: var(--transfer-base-header-paddingTop)
      var(--transfer-base-header-paddingRight)
      var(--transfer-base-header-paddingBottom)
      var(--transfer-base-header-paddingLeft);
    flex-direction: row;
    width: 100%;

    &--light {
      background: transparent;
    }

    > span {
      flex-grow: 1;
    }
  }

  &-footer {
    border-top: 1px solid var(--transfer-base-footer-border-color);
    display: flex;
    flex-flow: row nowrap;
    justify-content: flex-end;
    padding: var(--gap-sm);

    /* 底部空间较小，让Pagination紧凑一些 */
    &-pagination {
      & > ul {
        &.#{$ns}Pagination-item {
          margin-left: 0;
        }

        & > li {
          --Pagination-minWidth: #{px2rem(22px)};
          --Pagination-height: #{px2rem(22px)};
          --Pagination-padding: 0 #{px2rem(6px)};
        }
      }

      .#{$ns}Pagination-perpage {
        --select-base-default-paddingTop: 0;
        --select-base-default-paddingBottom: 0;
        --select-base-default-paddingLeft: #{px2rem(6px)};
        --select-base-default-paddingRight: #{px2rem(6px)};

        margin-left: 0;

        .#{$ns}Select-valueWrap {
          line-height: #{px2rem(22px)};
        }
      }
    }
  }

  &-select,
  &-result {
    overflow: hidden;
    width: 0;
    min-width: px2rem(200px);
    max-height: px2rem(400px);
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    border-width: var(--transfer-base-top-border-width)
      var(--transfer-base-right-border-width)
      var(--transfer-base-bottom-border-width)
      var(--transfer-base-left-border-width);
    border-style: var(--transfer-base-top-border-style)
      var(--transfer-base-right-border-style)
      var(--transfer-base-bottom-border-style)
      var(--transfer-base-left-border-style);
    border-color: var(--transfer-base-top-border-color)
      var(--transfer-base-right-border-color)
      var(--transfer-base-bottom-border-color)
      var(--transfer-base-left-border-color);
    border-radius: var(--transfer-base-top-left-border-radius)
      var(--transfer-base-top-right-border-radius)
      var(--transfer-base-bottom-right-border-radius)
      var(--transfer-base-bottom-left-border-radius);

    &--pagination {
      max-height: px2rem(475px);
    }
  }

  &-select > &-selection,
  &-result > &-value {
    flex-grow: 1;
    max-height: 100%;
    overflow: auto;
    position: relative; // 貌似不加 relative 会有 bug。
    padding: var(--transfer-base-body-paddingTop)
      var(--transfer-base-body-paddingRight)
      var(--transfer-base-body-paddingBottom)
      var(--transfer-base-body-paddingLeft);
    width: 100%;
  }

  .#{$ns}GroupedSelection-item,
  .#{$ns}Selections-item {
    padding: var(--transfer-base-option-paddingTop)
      var(--transfer-base-option-paddingRight)
      var(--transfer-base-option-paddingBottom)
      var(--transfer-base-option-paddingLeft);
    margin: var(--transfer-base-option-marginTop)
      var(--transfer-base-option-marginRight)
      var(--transfer-base-option-marginBottom)
      var(--transfer-base-option-marginLeft);
    line-height: var(--transfer-base-content-lineHeight);
    font-size: var(--transfer-base-content-fontSize);
    font-weight: var(--transfer-base-content-fontWeight);

    color: var(--transfer-base-content-color);
  }

  .#{$ns}ChainedSelection-item {
    padding: var(--transfer-chained-paddingTop)
      var(--transfer-chained-paddingRight) var(--transfer-chained-paddingBottom)
      var(--transfer-chained-paddingLeft);
    margin: var(--transfer-chained-marginTop)
      var(--transfer-chained-marginRight) var(--transfer-chained-marginBottom)
      var(--transfer-chained-marginLeft);
    line-height: var(--transfer-base-content-lineHeight);
    font-size: var(--transfer-base-content-fontSize);
    font-weight: var(--transfer-base-content-fontWeight);

    color: var(--transfer-base-content-color);
  }

  .#{$ns}GroupedSelection-group > .#{$ns}GroupedSelection-itemLabel {
    font-size: var(--transfer-group-fontSize);
    font-weight: var(--transfer-group-fontWeight);
    line-height: var(--transfer-group-lineHeight);
    color: var(--transfer-group-color);
  }

  &-select > .#{$ns}ChainedSelection {
    min-height: unset;
    overflow: hidden;

    .#{$ns}ChainedSelection-col {
      height: 100%;
      overflow: auto;
      min-width: unset;
      flex: 1 1 0;
    }
  }

  .#{$ns}-ResultTreeList {
    border-top: 1px solid var(--borderColor);
  }

  .#{$ns}AssociatedSelection {
    overflow: hidden;

    &-left,
    &-right {
      min-height: unset;
    }
  }

  &-select {
    overflow: hidden;
  }

  &-selection {
    .#{$ns}ListSelection-placeholder {
      height: 100%;
      display: flex;
      align-items: center;
      text-align: center;
      justify-content: center;
    }

    &.#{$ns}Tree,
    &.#{$ns}AssociatedSelection {
      .#{$ns}Tree-itemLabel.is-checked:hover,
      .#{$ns}Tree-itemLabel:hover {
        .#{$ns}Tree-itemLabel-item > .#{$ns}Tree-itemText {
          background-color: unset;
          &:active {
            background-color: unset;
          }
        }
      }

      .#{$ns}Tree-itemLabel-item {
        display: flex;
        align-items: center;

        > .#{$ns}Tree-itemText {
          max-width: unset;
          line-height: unset;
          top: unset;

          & > span.is-invalid {
            color: var(--Form-selectValue-onInvalid-color);
          }
        }
      }
    }
  }

  &-search {
    padding: var(--transfer-search-paddingTop)
      var(--transfer-search-paddingRight) var(--transfer-search-paddingBottom)
      var(--transfer-search-paddingLeft);
    width: 100%;
    .#{$ns}InputBox:not(.is-mobile) {
      font-size: var(--transfer-search-fontSize);
      font-weight: var(--transfer-search-fontWeight);
      line-height: var(--transfer-search-lineHeight);
      color: var(--transfer-search-color);
      border-width: var(--transfer-search-top-border-width)
        var(--transfer-search-right-border-width)
        var(--transfer-search-bottom-border-width)
        var(--transfer-search-left-border-width);
      border-style: var(--transfer-search-top-border-style)
        var(--transfer-search-right-border-style)
        var(--transfer-search-bottom-border-style)
        var(--transfer-search-left-border-style);
      border-color: var(--transfer-search-top-border-color)
        var(--transfer-search-right-border-color)
        var(--transfer-search-bottom-border-color)
        var(--transfer-search-left-border-color);
      border-radius: var(--transfer-search-top-left-border-radius)
        var(--transfer-search-top-right-border-radius)
        var(--transfer-search-bottom-right-border-radius)
        var(--transfer-search-bottom-left-border-radius);
      box-shadow: var(--transfer-search-shadow);

      &:hover {
        border-color: var(--transfer-search-border-hover-color);
      }

      &.is-focused {
        border-color: var(--transfer-search-border-active-color);
      }

      input {
        color: var(--transfer-search-color);
        font-size: var(--transfer-search-fontSize);
        font-weight: var(--transfer-search-fontWeight);
        line-height: var(--transfer-search-lineHeight);

        height: var(--transfer-search-lineHeight);
      }

      input::placeholder {
        color: var(--transfer-search-placeholder-font-color);
      }
    }

    &.is-mobile {
      .#{$ns}InputBox {
        border: none;
        border-bottom: var(--transfer-search-bottom-border-width)
          var(--transfer-search-bottom-border-style)
          var(--transfer-search-bottom-border-color);
        border-radius: 0;
      }
    }
  }

  &-mid {
    min-width: px2rem(10px);
    display: flex;
    flex-direction: column;
    justify-content: center;

    &.is-mobile {
      display: none;
    }
  }

  &-arrow {
    width: 40px;
    height: 30px;
    display: flex;
    justify-content: center;
    align-items: center;
    border: 1px solid var(--borderColor);
    margin: 0 10px;
    color: var(--icon-color);

    > svg {
      top: 0;
      width: 14px;
      height: 14px;
    }
  }

  &-checkAll,
  &-clearAll {
    user-select: none;
    cursor: pointer;

    &.is-disabled {
      pointer-events: none;
      color: var(--text--muted-color);
    }
  }

  .#{$ns}Tree {
    padding: var(--transfer-tree-paddingTop) var(--transfer-tree-paddingRight)
      var(--transfer-tree-paddingBottom) var(--transfer-tree-paddingLeft);
    margin: var(--transfer-tree-marginTop) var(--transfer-tree-marginLeft)
      var(--transfer-tree-marginBottom) var(--transfer-tree-marginRight);

    &-itemLabel:hover::after {
      left: 0;
    }

    &-itemLabel {
      padding: var(--transfer-tree-option-paddingTop)
        var(--transfer-tree-option-paddingRight)
        var(--transfer-tree-option-paddingBottom)
        var(--transfer-tree-option-paddingLeft);
      margin: var(--transfer-tree-option-marginTop)
        var(--transfer-tree-option-marginLeft)
        var(--transfer-tree-option-marginBottom)
        var(--transfer-tree-option-marginRight);
      border-radius: var(--transfer-tree-top-left-border-radius)
        var(--transfer-tree-top-right-border-radius)
        var(--transfer-tree-bottom-right-border-radius)
        var(--transfer-tree-bottom-left-border-radius);
      overflow: hidden;

      &:hover {
        background: var(--transfer-tree-bg-hover-color);
        .#{$ns}Tree-itemLabel-item {
          background: var(--transfer-tree-bg-hover-color);
        }
      }

      &.is-checked {
        background: var(--transfer-tree-bg-active-color);
        .#{$ns}Tree-itemLabel-item {
          background: var(--transfer-tree-bg-active-color);
        }
      }
    }

    &-itemText {
      line-height: var(--transfer-base-content-lineHeight);
      font-size: var(--transfer-base-content-fontSize);
      font-weight: var(--transfer-base-content-fontWeight);

      color: var(--transfer-base-content-color);
    }
  }

  .#{$ns}Table-content {
    .#{$ns}Table-table > thead > tr > th {
      padding: var(--transfer-table-header-paddingTop)
        var(--transfer-table-header-paddingRight)
        var(--transfer-table-header-paddingBottom)
        var(--transfer-table-header-paddingLeft);
      background: var(--transfer-base-title-bg);
      color: var(--transfer-base-title-color);
      line-height: var(--transfer-base-title-lineHeight);
      font-size: var(--transfer-base-content-fontSize);

      &:last-child {
        padding-right: var(--transfer-table-last-paddingRight);
      }
    }
    .#{$ns}Table-table > tbody > tr > td {
      padding: var(--transfer-table-option-paddingTop)
        var(--transfer-table-option-paddingRight)
        var(--transfer-table-option-paddingBottom)
        var(--transfer-table-option-paddingLeft);
      line-height: var(--transfer-base-content-lineHeight);
      font-size: var(--transfer-base-content-fontSize);
      font-weight: var(--transfer-base-content-fontWeight);

      & > span.is-invalid {
        color: var(--Form-selectValue-onInvalid-color);
      }

      &:last-child {
        padding-right: var(--transfer-table-last-paddingRight);
      }
    }
  }

  .#{$ns}Selections .#{$ns}TableSelection {
    .#{$ns}Table-table > thead > tr,
    .#{$ns}Table-table > tbody > tr {
      height: auto;
    }
  }

  .#{$ns}Transfer-result {
    .#{$ns}Transfer-title {
      height: px2rem(40px);
      line-height: px2rem(40px);
    }

    &.is-mobile {
      .#{$ns}Transfer-search {
        .#{$ns}InputBox {
          border: none;
          border-bottom: var(--transfer-search-bottom-border-width)
            var(--transfer-search-bottom-border-style)
            var(--transfer-search-bottom-border-color);
          border-radius: 0;
        }
      }
    }
  }
}

.#{$ns}TabsTransfer {
  .#{$ns}Transfer-title {
    height: 40px;
  }
  &-tabs {
    .#{$ns}Tabs-linksContainer {
      padding-left: px2rem(20px);
      padding-right: px2rem(20px);
      padding-top: px2rem(8px);
      background-color: var(--TabsTransfer-title-bg);
    }
  }

  .#{$ns}Tree.#{$ns}Transfer-checkboxes {
    width: 100%;
  }

  &-search {
    margin: var(--gap-sm) var(--gap-sm);
    .#{$ns}InputBox {
      border: 1px solid var(--TabsTransfer-border-color);
    }
  }

  .#{$ns}Transfer-result {
    .#{$ns}Transfer-title {
      height: px2rem(40px);
      line-height: px2rem(40px);
    }
  }

  // .#{$ns}Transfer-result {
  //   flex-grow: unset;
  // }

  &-placeholder {
    @include checkboxes-placeholder();
  }

  &-tab {
    padding: 0;
    overflow: auto;
  }

  &-tabs {
    display: flex;
    flex-direction: column;
    height: 100%;

    > .#{$ns}Tabs-links {
      border-top: 0 none;
      padding: 5px 0 0 5px;
      display: flex;
      flex-direction: row;
      flex-wrap: wrap;
      align-items: center;

      > .#{$ns}Tabs-link > a:first-child {
        font-size: 12px;
        padding: 7px 8px;
      }

      .#{$ns}TabsTransfer-tabsMid {
        flex-grow: 1;
      }

      > .#{$ns}SearchBox {
        margin: -5px 5px 0 10px;

        &.is-active {
          width: 150px;
          margin-right: 10px;
          padding-left: 10px;
        }
      }
    }

    > .#{$ns}Tabs-content {
      flex-grow: 1;
      min-height: 0;
      position: relative;
      padding: 5px 0 0;

      > .#{$ns}Tabs-pane {
        position: relative;
        height: 100%;

        &.is-active {
          display: flex;
          flex-direction: column;

          > .#{$ns}Transfer-selection {
            flex-grow: 1;
            max-height: 100%;
            overflow: auto;
          }
        }
      }

      .#{$ns}TabsTransfer-search {
        &.is-mobile {
          .#{$ns}InputBox {
            border: none;
            border-bottom: 1px solid var(--TabsTransfer-border-color);
            border-radius: 0;
          }
        }
      }
    }
  }
}

.#{$ns}TransferControl {
  position: relative;
  overflow: hidden;
  box-shadow: var(--transfer-base-shadow);

  &.is-inline {
    display: inline-block;
  }
}

.#{$ns}TransferPicker {
  &-icon {
    transition: transform var(--animation-duration) ease-out;
    margin: 5px 5px 5px auto;
    display: flex;
    color: var(--Form-select-caret-iconColor);
    &:hover {
      color: var(--Form-select-caret-onHover-iconColor);
    }

    > svg {
      width: px2rem(12px);
      height: px2rem(12px);
      top: 0;
    }
  }
}

.#{$ns}TransferDropDown {
  &:hover {
    border: px2rem(1px) solid ver(--menu-active-color);
  }
  &-icon {
    transform: rotate(90deg);
    transition: transform var(--animation-duration) ease-out;
    margin: px2rem(5px) 0 px2rem(5px) auto;
    display: flex;
    color: var(--Form-select-caret-iconColor);
    &:hover {
      color: var(--Form-select-caret-onHover-iconColor);
    }

    > svg {
      width: px2rem(10px);
      height: px2rem(10px);
      top: 0;
    }
  }

  &.is-active &-icon {
    transform: rotate(-90deg);
  }
}
.#{$ns}TransferDropDown-content {
  min-width: px2rem(40px);
  display: flex;
  flex-direction: column;
  padding: var(--gap-xs) 0;

  &.is-mobile {
    width: 100%;
    min-width: auto;

    .#{$ns}Table-table > thead > tr > th:first-child.#{$ns}Table-checkCell {
      padding-left: var(--select-table-option-paddingLeft);
    }
  }

  & > .#{$ns}Transfer-selection {
    flex-grow: 1;
    max-height: var(--Transfer-selection-maxHeight);
    overflow-x: hidden;
    overflow-y: auto;
    position: relative; // 貌似不加 relative 会有 bug。
  }
}