问题:
This question already has an answer here: 这个问题已经在这里有了答案:
I am using something similar to the following code: 我正在使用类似于以下代码的内容:
<div style="opacity:0.4; background-image:url(...);">
<div style="opacity:1.0;">
Text
</div>
</div>
I expected this to make the background have an opacity of 0.4 and the text to have 100% opacity. 我希望这可以使背景的不透明度为0.4,文本的不透明度为100%。 Instead they both have an opacity of 0.4. 相反,它们都具有0.4的不透明度。
解决方案:
参考一: https://stackoom.com/question/hjU5/CSS背景不透明度-重复参考二: https://oldbug.net/q/hjU5/CSS-Background-Opacity-duplicate
来源:oschina
链接:https://my.oschina.net/u/4438370/blog/4269843