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<!DOCTYPE html> <html> <head> <style> .spelling-error { text-decoration-line: underline; text-decoration-style: wavy; text-decoration-color: red; } </style> </head> <body> <h1>u 元素 + CSS</h1> <p>这是一些<u class="spelling-error">拼写错误</u>的文本。</p> </body> </html>