.#{$ns}Nav {
  position: relative;

  .#{$ns}Nav-itemIcon {
    margin-right: var(--gap-sm);
  }

  .#{$ns}Nav-list {
    list-style: none;
    user-select: none;
    margin: 0;
    padding: 0;
    position: relative;

    img.#{$ns}Nav-itemIcon {
      height: var(--Tabs-linkFontSize);
      vertical-align: middle;
    }

    .#{$ns}Nav-itemToggler {
      margin-right: px2rem(10px);
      height: px2rem(24px);
      text-align: center;
      line-height: px2rem(24px);
      vertical-align: middle;
      cursor: pointer;
      transform: scale(0.8);
      transition: transform var(--animation-duration);

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

    &-overflow {
      min-height: var(--Nav-Item-height) !important;
      max-height: calc(var(--Nav-Item-height) * 5);
      max-width: var(--Nav-Item-maxWidth--tabs);
      font-size: var(--Nav-subItem-fontSize);
      overflow-x: hidden;
      overflow-y: auto;

      .#{$ns}Nav-subItems {
        margin-block-start: 0;
        margin-block-end: 0;
      }

      .#{$ns}Nav-item {
        max-width: var(--Nav-Item-maxWidth--tabs);
        height: var(--Nav-Item-height);

        > a {
          border: none !important;
          display: block !important;
          text-overflow: ellipsis;
          overflow: hidden;
          white-space: nowrap;
          user-select: none;
        }
      }
    }

    &--tabs {
      border-bottom: var(--Tabs-borderWidth) solid var(--Tabs-borderColor);

      &.nav-simple {
        display: flex;

        .#{$ns}Nav-item {
          margin-bottom: 0;
          vertical-align: text-top;

          > a {
            border: none;
            margin: 0;
            padding: var(--gap-md) 0;
          }

          &:hover {
            > a,
            > a:focus {
              border: none;
              color: var(--Tabs-onActive-color);
              text-decoration: none;
            }
          }

          &.active > a,
          &.is-active > a {
            border: none;
            background: none;
          }

          &.is-active {
            position: relative;

            &:after {
              position: absolute;
              content: '';
              bottom: 0;
              width: 100%;
              height: px2rem(2px);
              background-color: var(--Tabs-onActive-color);
            }
          }

          .#{$ns}Nav-subItems {
            display: none;
          }
        }

        &:first-child {
          margin-left: 0;
        }
      }

      .#{$ns}Nav-item {
        margin-bottom: calc(var(--Tabs-borderWidth) * -1);
        display: inline-block;
        position: relative;
        max-width: var(--Nav-Item-maxWidth--tabs);

        > a {
          font-size: var(--Tabs-linkFontSize);
          display: block;
          outline: none;
          border: var(--Tabs-borderWidth) solid transparent;
          border-top-left-radius: var(--Tabs-borderRadius);
          border-top-right-radius: var(--Tabs-borderRadius);
          color: var(--Tabs-color);
          text-decoration: none;
          margin-right: px2rem(2px);
          padding: var(--gap-sm) var(--gap-xl);
          cursor: pointer;
          text-overflow: ellipsis;
          overflow: hidden;
          white-space: nowrap;
        }

        &:hover {
          > a,
          > a:focus {
            border-color: var(--Tabs-onHover-borderColor);
            border-bottom: none; // 外层已经有border-bottom了
            color: var(--Tabs-onActive-color);
            text-decoration: none;
          }
        }

        &.disabled > a,
        &.is-disabled > a {
          color: var(--Tabs-onDisabled-color);
          background: transparent;
          border-color: transparent;
          pointer-events: none;
        }

        &.active > a,
        &.is-active > a {
          color: var(--Tabs-onActive-color);
          background: var(--Tabs-onActive-bg);
          border-color: var(--Tabs-onActive-borderColor);
          border-bottom-color: var(--Tabs-content-bg);
        }
      }

      > .#{$ns}Nav-item {
        margin-left: px2rem(40px);
      }

      .#{$ns}Nav-item-overflow {
        &:hover > a,
        > a:focus,
        &.is-overflow-opened > a {
          color: var(--primary);
          border-color: transparent;
        }
      }
    }

    &--stacked {
      min-height: px2rem(50px);

      .#{$ns}Nav-item,
      .#{$ns}Badge {
        position: relative;
        display: flex;
        flex-wrap: wrap;
        align-items: stretch;
        width: 100%;

        .#{$ns}Nav-itemDrager {
          cursor: move;
          position: absolute;
          left: 0;
          display: none;
          line-height: 0;
          > .icon,
          > .#{$ns}Badge > .icon {
            color: var(--icon-color);

            &:hover {
              color: var(--icon-onHover-color);
            }
          }

          svg {
            width: px2rem(16px);
            height: px2rem(16px);
          }
        }

        > .#{$ns}Badge-ribbon-out {
          z-index: 3;
        }

        > .#{$ns}Nav-item-atcions {
          display: flex;
          align-items: center;
        }

        > a,
        > .#{$ns}Badge > a {
          display: flex;
          align-items: center;
          outline: none;
          color: var(--Nav-item-color);
          text-decoration: none;
          padding: var(--gap-sm) var(--gap-sm);
          cursor: pointer;
          background: var(--Nav-item-bg);
          border-radius: var(--Nav-item-borderRadius);
          text-overflow: ellipsis;
          flex: 1;
        }

        > a:hover,
        > a:focus,
        > a:hover + .#{$ns}Nav-item-atcions,
        > a:focus + .#{$ns}Nav-item-atcions,
        > .#{$ns}Badge > a:hover,
        > .#{$ns}Badge > a:focus,
        > .#{$ns}Badge > a:hover + .#{$ns}Nav-item-atcions,
        > .#{$ns}Badge > a:focus + .#{$ns}Nav-item-atcions {
          border-color: var(--Nav-item-onHover-color);
          text-decoration: none;
          background: var(--Nav-item-onHover-bg);
          z-index: 1;
        }

        > a:hover > .#{$ns}Nav-itemDrager,
        > a:focus > .#{$ns}Nav-itemDrager,
        > .#{$ns}Badge > a:hover > .#{$ns}Nav-itemDrager,
        > .#{$ns}Badge > a:focus > .#{$ns}Nav-itemDrager {
          display: block;
        }

        &.disabled > a,
        &.is-disabled > a,
        &.disabled > .#{$ns}Badge > a,
        &.is-disabled > .#{$ns}Badge > a {
          color: var(--Nav-item-onDisabled-color);
          background: transparent;
          pointer-events: none;
        }

        &.active > a,
        &.is-active > .#{$ns}Nav-item-atcions,
        &.is-active > a,
        &.active > .#{$ns}Badge > a,
        &.is-active > .#{$ns}Badge > .#{$ns}Nav-item-atcions,
        &.is-active > .#{$ns}Badge > a {
          color: var(--Nav-item-onActive-color);
          position: relative;
          background: var(--Nav-item-onActive-bg) !important;
        }

        &.is-unfolded >,
        &.is-unfolded > .#{$ns}Badge > {
          a .#{$ns}Nav-itemToggler {
            transform: rotate(180deg) scale(0.8);
          }

          .#{$ns}Nav-subItems {
            display: block;
          }
        }

        &.is-after {
          .#{$ns}Nav-itemToggler {
            margin-left: auto;
          }

          > a,
          > .#{$ns}Badge > a {
            font-size: var(--Nav-item-fontSize);
            padding: 0;
            height: px2rem(40px);
            border-radius: 0;
          }

          > a:hover,
          > a:focus,
          > a:hover + .#{$ns}Nav-item-atcions,
          > a:focus + .#{$ns}Nav-item-atcions,
          > .#{$ns}Badge > a:hover,
          > .#{$ns}Badge > a:focus,
          > .#{$ns}Badge > a:hover + .#{$ns}Nav-item-atcions,
          > .#{$ns}Badge > a:focus + .#{$ns}Nav-item-atcions {
            background: none;
            color: var(--Nav-item-onActive-color);
          }

          &.is-active {
            > .#{$ns}Badge > a {
              background-color: var(
                --Nav-item-onActive-backgroundColor
              ) !important;
            }

            &::after {
              position: absolute;
              left: 0;
              content: '';
              width: 3px;
              height: 100%;
              background-color: var(--Nav-item-onActive-borderColor);
              z-index: 2;
            }
          }
        }

        .#{$ns}Nav-spinner {
          position: absolute;
          right: px2rem(10px);
          top: px2rem(8px);
        }

        .#{$ns}Nav-subItems {
          display: none;
          padding-left: 0;
          list-style: none;
          width: 100%;
        }

        .#{$ns}Nav-item {
          font-size: var(--Nav-subItem-fontSize);
        }
      }
    }
  }
  .#{$ns}Nav-dropIndicator {
    position: absolute;
    background: var(--Nav-item-onActive-color);
    height: 2px;
  }
}

// 悬浮菜单是挂在body下面的
.#{$ns}Nav-itemIconAfter {
  margin-right: 0;
  margin-left: var(--gap-sm);
}