<html>
<head>
<style>
::input-placeholder { /* Edge */
color: red;
}
:input-placeholder { /* Internet Explorer */
color: red;
}
::placeholder {
color: red;
}
</style>
</head>
<body>
<p>请使用 ::placeholder 选择器来改变占位文本的颜色:</p>
<input type="text" name="fname" placeholder="First name">
</body>
</html>