<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<style>
#txt{
height:100%;
width:230px;
font-size:12px;color:red;
}
#txt::-webkit-input-placeholder{
color:red;
}
</style>
</head>
<body>
<input type="text" id="txt" placeholder="请输入作者姓名"/>
</body>
</html>
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