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CSS 透明度
试用：使用不同的透明度值
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<!DOCTYPE html> <html> <head> <style> div { background-color: #04AA6D; padding: 10px; } div.first { opacity: 0.1; } div.second { opacity: 0.3; } div.third { opacity: 0.6; } </style> </head> <body> <h1>Transparent Box</h1> <p>When using the opacity property to add transparency to the background of an element, all of its child elements become transparent as well. This can make the text inside a fully transparent element hard to read:</p> <div class="first"><p>opacity 0.1</p></div> <div class="second"><p>opacity 0.3</p></div> <div class="third"><p>opacity 0.6</p></div> <div><p>opacity 1 (default)</p></div> </body> </html>
