siyuan/app/src/assets/scss/_list.scss

.b3-list {
  mark {
    background-color: var(--b3-protyle-inline-mark-background);
    color: var(--b3-protyle-inline-mark-color);
  }

  &--background .b3-list-item {
    &:hover:not(.b3-list-item--focus),
    &--focus:not(.dragover):not(.dragover__top):not(.dragover__bottom) {
      background-color: var(--b3-list-hover);
    }
  }

  &--empty {
    justify-content: center;
    color: var(--b3-theme-on-surface);
    padding: 4px 16px;
    list-style: none;
  }

  &--border {
    ul {
      margin-left: 34px;
      position: relative;
    }

    & > ul ul:before {
      content: "";
      height: 100%;
      top: 0;
      position: absolute;
      border-left: 1px solid var(--b3-theme-background-light);
      left: -55px;
    }

    & > ul li:before {
      content: "";
      height: 100%;
      top: 0;
      position: absolute;
      border-left: 1px solid var(--b3-theme-background-light);
      left: -21px;
    }
  }

  &-item {
    line-height: 28px;
    padding: 1px 8px;
    display: flex;
    cursor: pointer;
    align-items: center;
    position: relative;
    background-color: transparent;
    text-align: left;
    border: 0;
    color: var(--b3-theme-on-background);
    margin-top: 0 !important;

    &[draggable="true"]:active {
      cursor: grabbing;
    }

    &--big {
      padding: 16px 24px;

      .b3-list-item__graphic {
        margin-right: 24px;
        height: 16px;
        width: 16px;
      }
    }

    &--two {
      display: block;

      .b3-list-item__first {
        display: flex;
        align-items: center;
      }

      .b3-list-item__meta {
        margin-left: 0;
      }
    }

    &--hide-action {
      .b3-list-item__action {
        display: none;
      }

      &:hover > .b3-list-item__action,
      &:hover > .fn__space {
        display: flex;
      }
    }

    &__toggle {
      display: flex;
      align-items: center;
      height: 22px;
      padding-right: 6px;
      color: var(--b3-theme-on-surface);
      transition: var(--b3-transition);

      &--hl:hover {
        color: var(--b3-theme-on-background);
        background-color: var(--b3-theme-background-light);
        border-radius: 2px;
      }
    }

    &__icon {
      svg, img {
        float: left;
        margin: 3px 0;
        height: 16px;
        width: 16px;
        color: var(--b3-theme-on-surface);
        border-radius: 2px;
      }

      text-align: center;
      font-size: 16px;
      margin-right: 4px;
      line-height: 22px;
      height: 22px;
      transition: var(--b3-transition);
      padding: 0 3px;
      flex-shrink: 0;

      &:hover {
        color: var(--b3-theme-on-background);
        background-color: var(--b3-theme-background-light);
        border-radius: 2px;
      }
    }

    &__hinticon {
      width: 12px;
      height: 12px;
      fill: currentColor;
      color: var(--b3-theme-on-background);
      align-self: center;
      flex-shrink: 0;
      margin-right: 4px;
    }

    &__graphic {
      margin-right: 4px;
      padding: 0 2px;
      flex-shrink: 0;
      height: 14px;
      width: 12px;
      line-height: 14px;
      font-size: 12px;

      // doc icon in the bookmark panel
      svg {
        width: 12px;
        height: 14px;
      }
    }

    &__arrow {
      flex-shrink: 0;
      height: 10px;
      width: 10px;
      transition: transform 0.15s cubic-bezier(0, 0, 0.2, 1), opacity 1s cubic-bezier(0, 0, 0.2, 1);

      &--open {
        transform: rotate(90deg);
      }
    }

    &__text {
      flex: 1;
      background-color: transparent;
      text-align: left;
      border: 0;
      padding: 0;
      color: var(--b3-theme-on-background);
      @include text-clamp(1);

      // 搜索列表中自定义图标
      & > img,
      & > .custom-icon {
        height: 14px;
        width: 14px;
        float: left;
        margin-top: 7px;
      }
    }

    &__showall {
      line-height: 1;
      word-break: break-all;
    }

    &__meta {
      font-size: 0.75rem;
      margin-left: 8px;
      flex-shrink: 0;
      color: var(--b3-theme-on-surface);

      &--ellipsis {
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
        max-width: 50%;
      }
    }

    &__action {
      flex-shrink: 0;
      align-items: center;
      color: var(--b3-theme-on-surface);
      height: 22px;
      padding: 0 4px;
      margin-left: 4px;
      display: flex;

      svg {
        height: 14px;
        width: 14px;
      }

      &:hover {
        color: var(--b3-theme-on-background);
        background-color: var(--b3-theme-background-light);
        border-radius: 2px;
      }
    }

    .counter {
      cursor: pointer;

      &:hover {
        color: var(--b3-theme-on-background);
        background-color: var(--b3-theme-background-light);
      }
    }
  }
}