ant-design/style/components/upload.less

@upload-prefix-cls: ant-upload;

.@{upload-prefix-cls} {

  > span {
    display: block;
    width: 100%;
  }

  input[type=file] {
    cursor: pointer;
  }

  &.@{upload-prefix-cls}-select {
    display: inline-block;
  }

  &.@{upload-prefix-cls}-drag {
    border: 1px dashed #d9d9d9;
    transition: border-color 0.3s ease;
    cursor: pointer;
    border-radius: @border-radius-base;
    text-align: center;
    width: 100%;
    height: 100%;
    position: relative;

    &.@{upload-prefix-cls}-drag-hover {
      border: 2px dashed tint(@primary-color, 20%);
    }

    > span {
      display: table;
      height: 100%;
    }

    .@{upload-prefix-cls}-drag-container {
      display: table-cell;
      vertical-align: middle;
    }

    &:hover {
      border-color: tint(@primary-color, 20%);
    }

    p.@{upload-prefix-cls}-drag-icon {
      .anticon {
        font-size: 80px;
        margin-top: -5px;
        color: tint(@primary-color, 20%);
      }
      height: 60px;
      margin-bottom: 24px;
    }
    p.@{upload-prefix-cls}-text {
      font-size: 14px;
    }
    p.@{upload-prefix-cls}-hint {
      font-size: 12px;
      color: #999;
    }
    .anticon-plus {
      font-size: 30px;
      transition: all 0.3s ease;
      color: #d9d9d9;
      &:hover {
        color: #999;
      }
    }
    &:hover .anticon-plus {
      color: #999;
    }
  }
}

.@{upload-prefix-cls}-list {
  .@{upload-prefix-cls}-list-item {
    overflow: hidden;
    margin-top: 8px;

    .@{upload-prefix-cls}-list-item-info {
      height: 22px;
      line-height: 22px;
      padding: 0 4px;
      transition: background-color 0.3s ease;

      .anticon-paper-clip {
        margin-right: 4px;
        font-size: 12px;
        color: #999;
      }
      .anticon-cross {
        .iconfont-size-under-12px(10px);
        transition: all 0.3s ease;
        opacity: 0;
        cursor: pointer;
        float: right;
        color: #999;
        line-height: 22px;
        &:hover {
          color: #666;
        }