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<!DOCTYPE html> <html> <head> <style> p.ex1 { border: 1px solid red; padding-top: 10%; } </style> </head> <body> <h1>padding-top 属性</h1> <p class="ex1">顶部填充 10% 的段落。 该百分比基于元素的宽度。</p> </body> </html>