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CSS 参考手册
CSS element.class 选择器
trycss_sel_element_class
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<!DOCTYPE html> <html> <head> <style> p.intro { background-color: yellow; } </style> </head> <body> <h1>Demo of the element.class selector</h1> <div class="intro"> <p>My name is Donald.</p> <p>I live in Duckburg.</p> </div> <p>My best friend is Mickey.</p> <p class="intro">My best friend is Mickey.</p> </body> </html>