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<!DOCTYPE html> <html> <head> <style> /* 默认的 CSS 值 */ section { display: block; } </style> </head> <body> <p>默认情况下，section 元素会这样显示：</p> <section> <h1>WWF</h1> <p>The World Wide Fund for Nature (WWF) is an international organization working on issues regarding the conservation, research and restoration of the environment, formerly named the World Wildlife Fund. WWF was founded in 1961.</p> </section> <p>自定义的 section 元素（添加 background-color）：</p> <section style="background-color:yellow;"> <h1>WWF</h1> <p>The World Wide Fund for Nature (WWF) is an international organization working on issues regarding the conservation, research and restoration of the environment, formerly named the World Wildlife Fund. WWF was founded in 1961.</p> </section> </body> </html>