semi-design/packages/semi-foundation/timeline/rtl.scss

$module: #{$prefix}-timeline;

.#{$prefix}-rtl,
.#{$prefix}-portal-rtl {
    .#{$module} {
        direction: rtl;

        &-item {

            &-tail {
                left: auto;
                right: $spacing-timeline_tail-left;
                border-left: 0;
                border-right: $width-timeline_tail-border solid $color-timeline_tail-border;
            }

            &-head-custom {
                left: auto;
                right: $spacing-timeline_head_custom-left;
                transform: $motion-timeline_head_custom-transform-rtl;
            }

            &-content {
                margin: $spacing-none $spacing-timeline_content-marginLeft $spacing-none $spacing-none;
            }

            &:last-child {
                .#{$module}-item-tail {
                    border-right: none;
                }
            }
        }

        &-alternate,
        &-right,
        &-center {
            .#{$module}-item {

                &-tail,
                &-head,
                &-head-custom {
                    left: auto;
                    right: $spacing-timeline_item_head_custom-left;
                }

                &-head {
                    margin-left: 0;
                    margin-right: $spacing-timeline_item_head-marginLeft;
                }

                &-left {
                    .#{$module}-item-content {
                        left: auto;
                        right: $spacing-timeline_item_left_item_content-left;
                        text-align: right;
                    }
                }

                &-right {
                    .#{$module}-item-content {
                        text-align: left;
                    }
                }
            }
        }

        &-center {
            .#{$module}-item {

                &-content-time {
                    margin-left: 0;
                    margin-right: $spacing-timeline_item_content_time-marginLeft;
                    text-align: left;
                }
            }
        }

        &-right {
            .#{$module}-item-right {
                .#{$module}-item {

                    &-tail,
                    &-head,
                    &-head-custom {
                        left: 0;
                        right: $spacing-timeline_item_right_item-left;
                    }
                }
            }
        }
    }
}