The text-combine-upright
CSS property sets the combination of characters into the space of a single character. If the combined text is wider than 1em, the user agent must fit the contents within 1em. The resulting composition is treated as a single upright glyph for layout and decoration. This property only has an effect in vertical writing modes.
This is used to produce an effect that is known as tate-chū-yoko (縦中横) in Japanese, or as 直書橫向 in Chinese.
/* Keyword values */ text-combine-upright: none; text-combine-upright: all; /* Digits values */ text-combine-upright: digits; /* fits 2 consecutive digits horizontally inside vertical text */ text-combine-upright: digits 4; /* fits up to 4 consecutive digits horizontally inside vertical text */ /* Global values */ text-combine-upright: inherit; text-combine-upright: initial; text-combine-upright: revert; text-combine-upright: revert-layer; text-combine-upright: unset;