<html><head><style> #example1 { border: 2px solid red; inline-size: 300px; padding: 10px; writing-mode: vertical-rl; border-start-end-radius: 25px;}</style></head><body><h2>border-start-end-radius: 25px:</h2><div id="example1"> <p>当 writing-mode 属性的值设置为 'vertical-rl' 时，受 border-start-end-radius 属性影响的角位于右上角。</p></div></body></html>