使用CSS设置背景附件
若要设置背景附件，请使用background-attachment属性。背景附件确定背景图像是固定的还是随页面的其余部分滚动。
示例
您可以尝试运行以下代码，以了解如何使用background-attachment属性设置固定的背景图片：
<!DOCTYPE html>
<html>
<head>
<style>
body {
background-image: url('/css/images/css.jpg');
background-repeat: no-repeat;
background-attachment: fixed;
}
</style>
</head>
<body>
<p>The background-image is fixed. Try to scroll down the page.</p>
<p>The background-image is fixed. Try to scroll down the page.</p>
<p>The background-image is fixed. Try to scroll down the page.</p>
<p>The background-image is fixed. Try to scroll down the page.</p>
<p>The background-image is fixed. Try to scroll down the page.</p>
<p>The background-image is fixed. Try to scroll down the page.</p>
<p>The background-image is fixed. Try to scroll down the page.</p>
<p>The background-image is fixed. Try to scroll down the page.</p>
<p>The background-image is fixed. Try to scroll down the page.</p>
</body>
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