Test link(s): [test](https://w3c.github.io/i18n-tests/exploratory/index.html?text=%3Clabel%3E%E8%AF%84%E8%AE%BA%20%3Cinput%20type%3D%22text%22%20value%3D%22%E7%BC%94%E9%80%A0%E7%9C%9F%E6%AD%A3%E5%85%A8%E7%90%83%E9%80%9A%E8%A1%8C%E7%9A%84%E4%B8%87%E7%BB%B4%E7%BD%91%22%3E%3C%2Finput%3E%3C%2Flabel%3E&css=.test%20%7B%20writing-mode%3A%20vertical-rl%3B%20%7D&lang=zh&fontSize=36&width=500&height=500&a=When%20vertically-set%20CJK%20text%20contains%20a%20text%20input%20element%2C%20the%20control%20will%20be%20vertical.%20A%20preceding%20label%20will%20appear%20above%20the%20box.&i=Test%20passes%20if%20the%20box%20is%20tall%20and%20thin%2C%20and%20all%20text%20is%20in%20a%20vertical%20orientation%2C%20and%20the%20label%20is%20vertical%20over%20the%20top.) Results: - **Gecko:** ✅ *Browser: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:109.0) Gecko/20100101 Firefox/109.0* - **Blink:** ✅ *Browser: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36* - **Webkit:** ✅ *Browser: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.4.1 Safari/605.1.15* Related tests: [Vertical text](https://www.w3.org/International/i18n-tests/results/int-vertical-text)