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<!DOCTYPE html> <html> <head> <style> ::-webkit-input-placeholder { /* Edge */ color: red; } :-ms-input-placeholder { /* Internet Explorer */ color: red; } ::placeholder { color: red; } </style> </head> <body> <p>使用 ::placeholder 选择器更改占位符文本的颜色：</p> <input type="text" name="fname" placeholder="First name"> </body> </html>