siyuan/app/src/assets/scss/component/_form.scss

.b3-form {
  &__space {
    margin: 16px 24px;

    &--small {
      margin: 8px 16px;
    }
  }

  &__icon {
    position: relative;
    color: var(--b3-theme-on-surface);

    &-icon {
      position: absolute;
      left: 9px;
      top: 6px;
      height: 16px;
      width: 16px;
    }

    &-input {
      padding-left: 35px !important;
    }

    &--small {
      .b3-form__icon-icon {
        left: 5px;
        top: 4px;
        height: 14px;
        width: 14px;
      }

      .b3-form__icon-input {
        padding-left: 25px !important;
      }
    }
  }

  &__icona {
    position: relative;
    color: var(--b3-theme-on-surface);

    &-icon {
      position: absolute;
      right: 1px;
      top: 1px;
      height: 16px;
      width: 16px;
      cursor: pointer;
      padding: 5px;

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

    &-input {
      width: 100%;
      padding-right: 35px !important;
    }
  }

  &__img {
    position: relative;

    img {
      position: absolute;
      left: 1px;
      top: 1px;
      height: 28px;
      border-radius: var(--b3-border-radius) 0 0 var(--b3-border-radius);
    }

    input {
      padding-left: 93px;
    }
  }

  &__upload {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    opacity: .001;
    overflow: hidden;
    cursor: pointer
  }
}

.b3-label {
  border-bottom: 1px solid var(--b3-border-color);
  padding: 16px 24px;
  line-height: 20px;

  &__text {
    // import 的话会导致设置关于中 ft__error 无效
    color: var(--b3-theme-on-surface);
    font-size: 14px !important;
    margin-top: 4px;
    overflow: hidden !important;
  }

  &__icon {
    width: 36px;
    height: 36px;
    align-self: center;
    margin-right: 16px;
    color: var(--b3-theme-on-surface);
  }

  &--inner {
    border-bottom: 0;
    padding: 0 !important;
  }

  &:last-child,
  &--noborder {
    border-bottom: 0;
  }
}