​x
 
<!DOCTYPE html>
<html>
<head>
<style>
.container {
  position: relative;
}
​
.center {
  position: absolute;
  top: 50%;
  width: 100%;
  text-align: center;
  font-size: 18px;
}
​
img { 
  width: 100%;
  height: auto;
  opacity: 0.3;
}
</style>
</head>
<body>
​
<h1>图像文本</h1>
​
<p>居中图像中的文本：</p>
​
<div class="container">
  <img src="/i/logo/w3logo-2.png" alt="W3School" width="800" height="450">
  <div class="center">Centered</div>
</div>
​
</body>
</html>
​