W3School TIY Editor
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<!DOCTYPE html> <html> <head> <style> div { background-color: lightgreen; inline-size: 300px; padding: 10px; border-inline-width: 5px; border-inline-style: solid; writing-mode: vertical-rl; border-inline-end-color: blue; } </style> </head> <body> <h2>border-inline-end-color: blue:</h2> <div> <p>当 writing-mode 的属性值设置为 'vertical-rl' 时，受 border-inline-end-color 属性影响的边框位于底部。</p> </div> </body> </html>