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<!DOCTYPE html> <html> <head> <style> div { background: rgb(76, 175, 80); padding: 10px; } div.first { background: rgba(76, 175, 80, 0.1); } div.second { background: rgba(76, 175, 80, 0.3); } div.third { background: rgba(76, 175, 80, 0.6); } </style> </head> <body> <h1>透明盒子</h1> <h2>使用不透明度属性：</h2> <div style="opacity:0.1;"><p>10% opacity</p></div> <div style="opacity:0.3;"><p>30% opacity</p></div> <div style="opacity:0.6;"><p>60% opacity</p></div> <div><p>opacity 1</p></div> <h2>使用 RGBA 颜色值：</h2> <div class="first"><p>10% opacity</p></div> <div class="second"><p>30% opacity</p></div> <div class="third"><p>60% opacity</p></div> <div><p>默认</p></div> </body> </html>