iview/src/styles/components/upload.less

@upload-prefix-cls: ~"@{css-prefix}upload";

.@{upload-prefix-cls} {
    input[type="file"]{
        display: none;
    }

    &-list{
        margin-bottom: 8px;

        &-file{
            padding: 4px;
            color: @text-color;
            border-radius: @border-radius-small;
            transition: background-color @transition-time @ease-in-out;
            overflow: hidden;
            position: relative;

            & + span{
                cursor: pointer;
                transition: color @transition-time @ease-in-out;
                i{
                    display: inline-block;
                    width: @font-size-small;
                    height: @font-size-small;
                    color: @text-color;
                    text-align: center;
                }
            }

            &:hover{
                background: @input-disabled-bg;
                & + span{
                    color: @primary-color;
                    i{
                        color: @text-color;
                    }
                }
                .@{upload-prefix-cls}-list-remove{
                    opacity: 1;
                }
            }
        }
        &-remove{
            opacity: 0;
            font-size: 18px;
            cursor: pointer;
            float: right;
            margin-right: 4px;
            color: @legend-color;
            transition: all @transition-time ease;
            &:hover{
                color: #444;
            }
        }
    }

    &-drag{
        background: #fff;
        border: 1px dashed @border-color-base;
        border-radius: @border-radius-small;
        text-align: center;
        cursor: pointer;
        position: relative;
        overflow: hidden;
        transition: border-color @transition-time ease;

        &:hover{
            border: 1px dashed @primary-color;
        }
    }
    &-dragOver{
        border: 2px dashed @primary-color;
    }
}