CSS 图像文字透明度
首先我们先展示一个背景半透明而内容不透明的例子：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>php.cn</title>
<style type="text/css">
body{
background: #40ed90;
}
#container {
color: #154BA0;
background: #ff0000;
filter: Alpha(Opacity=10, Style=0);
opacity: 0.10;
position: absolute;
height: 200px;
width:500px;
z-index:20;
}
#text {
position: absolute;
height: 200px;
width:500px;
text-align:center;
z-index:30;
}
</style>
</head>
<body>
<div id="container"></div>
<div id="text">背景半透明但文字不透明</div>
</body>
</html>注释：上面使用DIV+CSS实现的
下面我们在展示一个背景透明内容也透明的实例：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>php.cn</title>
<style type="text/css">
*{
padding: 0;
margin: 0;
}
body{
padding: 50px;
}
.demo{
padding: 25px;
background-color:#000000;
opacity: 0.2;
}
.demo p{
color: #FFFFFF;
}
</style>
</head>
<body>
<div class="demo">
<p>背景透明，文字也透明</p>
</div>
</body>
</html>
新建文件
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>php.cn</title>
<style type="text/css">
div.background
{
width:500px;
height:250px;
background:url(https://img.php.cn//upload/image/870/504/597/1476339972616793.jpg ) repeat;
border:2px solid black;
}
div.transbox
{
width:400px;
height:180px;
margin:30px 50px;
background-color:#ffffff;
border:1px solid black;
opacity:0.6;
filter:alpha(opacity=60); /* For IE8 and earlier */
}
div.transbox p
{
margin:30px 40px;
font-weight:bold;
color:#000000;
}
</style>
</head>
<body>
<div class="background">
<div class="transbox">
<p>这是一段文字</p>
</div>
</div>
</body>
</html>
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