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<!DOCTYPE html>
<html lang="zh" data-theme="light">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, viewport-fit=cover">
<title>TextMark · 文字隐形水印 / Invisible text watermarking</title>
<meta name="description" content="给任意文字加隐形水印：变体选择符编码 + Reed-Solomon 纠错 + 可选 AES-GCM 加密，另附 AI 可读的 emoji 签名条。纯浏览器本地运行，无服务器、无网络请求。">
<meta name="color-scheme" content="light dark">
<meta name="theme-color" content="#FDF8F1" id="themeColorMeta">
<link rel="icon" href="icon.svg" type="image/svg+xml">
<link rel="apple-touch-icon" href="icon.svg">
<link rel="manifest" href="manifest.webmanifest">
<link rel="stylesheet" href="style.css">
<script>
/* Set the theme before first paint to avoid a flash. */
(function () {
var t;
try { t = localStorage.getItem('textmark.theme'); } catch (e) { /* file:// or blocked */ }
if (t !== 'light' && t !== 'dark') {
t = window.matchMedia && matchMedia('(prefers-color-scheme: dark)').matches ? 'dark' : 'light';
}
document.documentElement.dataset.theme = t;
})();
</script>
</head>
<body>
<!-- icon sprite -->
<svg width="0" height="0" style="position:absolute" aria-hidden="true" focusable="false">
<defs>
<symbol id="i-embed" viewBox="0 0 24 24"><path d="M4 20h16M6 15.5 15.2 6.3a2.1 2.1 0 0 1 3 3L9 18.5l-4 1z"/></symbol>
<symbol id="i-detect" viewBox="0 0 24 24"><circle cx="11" cy="11" r="6.5"/><path d="M16 16l4.5 4.5"/></symbol>
<symbol id="i-clean" viewBox="0 0 24 24"><path d="M4 20h7M14.5 3.5l6 6M9 19 3.6 13.6 13.5 3.7l5.4 5.4z"/><path d="M7 10.5l6.5 6.5"/></symbol>
<symbol id="i-spec" viewBox="0 0 24 24"><path d="M4 5.5A2.5 2.5 0 0 1 6.5 3H18v18H6.5A2.5 2.5 0 0 1 4 18.5z"/><path d="M8 8h7M8 12h7M8 16h4"/></symbol>
<symbol id="i-sun" viewBox="0 0 24 24"><circle cx="12" cy="12" r="4.2"/><path d="M12 2.5v2M12 19.5v2M2.5 12h2M19.5 12h2M5.2 5.2l1.5 1.5M17.3 17.3l1.5 1.5M18.8 5.2l-1.5 1.5M6.7 17.3l-1.5 1.5"/></symbol>
<symbol id="i-moon" viewBox="0 0 24 24"><path d="M20 14.5A8.5 8.5 0 0 1 9.5 4a8.5 8.5 0 1 0 10.5 10.5z"/></symbol>
<symbol id="i-copy" viewBox="0 0 24 24"><rect x="9" y="9" width="11" height="11" rx="2.5"/><path d="M15 5.5A2.5 2.5 0 0 0 12.5 3h-6A3.5 3.5 0 0 0 3 6.5v6A2.5 2.5 0 0 0 5.5 15"/></symbol>
<symbol id="i-paste" viewBox="0 0 24 24"><path d="M9 4H7a2 2 0 0 0-2 2v13a2 2 0 0 0 2 2h10a2 2 0 0 0 2-2V6a2 2 0 0 0-2-2h-2"/><rect x="9" y="2.5" width="6" height="3.5" rx="1.2"/></symbol>
<symbol id="i-file" viewBox="0 0 24 24"><path d="M14 3v5h5"/><path d="M19 8.5V20a1 1 0 0 1-1 1H6a1 1 0 0 1-1-1V4a1 1 0 0 1 1-1h8z"/></symbol>
<symbol id="i-download" viewBox="0 0 24 24"><path d="M12 3.5v11M7.5 10.5 12 15l4.5-4.5M4.5 19.5h15"/></symbol>
<symbol id="i-trash" viewBox="0 0 24 24"><path d="M4.5 6.5h15M9 6.5V4.2h6v2.3M6.5 6.5 7.5 20h9l1-13.5"/></symbol>
<symbol id="i-eye" viewBox="0 0 24 24"><path d="M2.5 12S6 5.5 12 5.5 21.5 12 21.5 12 18 18.5 12 18.5 2.5 12 2.5 12z"/><circle cx="12" cy="12" r="3"/></symbol>
<symbol id="i-eye-off" viewBox="0 0 24 24"><path d="M4 4l16 16"/><path d="M9.6 5.9A9.4 9.4 0 0 1 12 5.5c6 0 9.5 6.5 9.5 6.5a17 17 0 0 1-2.7 3.5M6.4 8.2A16.7 16.7 0 0 0 2.5 12S6 18.5 12 18.5c1 0 1.9-.2 2.7-.5"/></symbol>
<symbol id="i-check" viewBox="0 0 24 24"><path d="M5 12.5 9.5 17 19 7"/></symbol>
<symbol id="i-sample" viewBox="0 0 24 24"><path d="M12 3.5l1.9 4.6 4.6 1.9-4.6 1.9L12 16.5l-1.9-4.6L5.5 10l4.6-1.9zM18 16l.9 2.1 2.1.9-2.1.9L18 22l-.9-2.1-2.1-.9 2.1-.9z"/></symbol>
<symbol id="i-arrow-right" viewBox="0 0 24 24"><path d="M4.5 12h14M13 6.5 18.5 12 13 17.5"/></symbol>
<!-- hand-drawn underline for the active tab; stretched horizontally on purpose -->
<symbol id="i-squiggle" viewBox="0 0 56 8" preserveAspectRatio="none">
<path d="M2 5.4c6-3.9 12-3.9 18 0s12 3.9 18 0 12-3.9 16 0" vector-effect="non-scaling-stroke"/>
</symbol>
</defs>
</svg>
<header class="topbar">
<a class="brand" href="#embed">
<span class="brand-mark" aria-hidden="true">📜</span>
<span class="brand-name">TextMark</span>
<span class="brand-sub" data-i18n="brandSub">文字隐形水印</span>
</a>
<nav class="tabs" role="tablist" aria-label="TextMark">
<button class="tab" role="tab" id="tab-embed" aria-controls="page-embed" aria-selected="true" data-tab="embed">
<svg class="icon" aria-hidden="true"><use href="#i-embed"></use></svg><span data-i18n="tabEmbed">加水印</span>
<svg class="squiggle tab-line" aria-hidden="true"><use href="#i-squiggle"></use></svg>
</button>
<button class="tab" role="tab" id="tab-detect" aria-controls="page-detect" aria-selected="false" data-tab="detect">
<svg class="icon" aria-hidden="true"><use href="#i-detect"></use></svg><span data-i18n="tabDetect">检测解码</span>
<svg class="squiggle tab-line" aria-hidden="true"><use href="#i-squiggle"></use></svg>
</button>
<button class="tab" role="tab" id="tab-clean" aria-controls="page-clean" aria-selected="false" data-tab="clean">
<svg class="icon" aria-hidden="true"><use href="#i-clean"></use></svg><span data-i18n="tabClean">清除水印</span>
<svg class="squiggle tab-line" aria-hidden="true"><use href="#i-squiggle"></use></svg>
</button>
<button class="tab" role="tab" id="tab-spec" aria-controls="page-spec" aria-selected="false" data-tab="spec">
<svg class="icon" aria-hidden="true"><use href="#i-spec"></use></svg><span data-i18n="tabSpec">公开规范</span>
<svg class="squiggle tab-line" aria-hidden="true"><use href="#i-squiggle"></use></svg>
</button>
</nav>
<div class="actions">
<button id="themeToggle" class="icon-btn" type="button" title="切换深浅色" aria-label="切换深浅色">
<svg class="icon icon-sun" aria-hidden="true"><use href="#i-sun"></use></svg>
<svg class="icon icon-moon" aria-hidden="true"><use href="#i-moon"></use></svg>
</button>
<button id="langToggle" class="lang-btn" type="button" title="Switch language" aria-label="Switch language">EN</button>
</div>
</header>
<main>
<!-- ================= EMBED ================= -->
<section id="page-embed" class="page active" role="tabpanel" aria-labelledby="tab-embed" tabindex="-1">
<div class="page-head">
<span class="page-num" aria-hidden="true">01</span>
<span class="page-kicker" aria-hidden="true">Embed</span>
<h1 class="page-title" data-i18n="embedTitle">给文本加水印</h1>
<p class="page-lead" data-i18n="embedHint">在文本中嵌入隐形水印（变体选择符编码 + 纠错 + 可选加密），并可附加 AI 可读的 emoji 签名条。全部计算在浏览器本地完成。</p>
<span class="sticker" data-i18n="localOnly">全部在本地算完 · no upload</span>
</div>
<div class="panel">
<div class="field">
<div class="field-head">
<label for="embedText" data-i18n="originalText">原文</label>
<span class="counter" id="embedTextCount"></span>
<span class="field-tools">
<button class="btn btn-sm" type="button" data-paste="embedText"><svg class="icon" aria-hidden="true"><use href="#i-paste"></use></svg><span data-i18n="paste">粘贴</span></button>
<button class="btn btn-sm" type="button" data-file="embedText"><svg class="icon" aria-hidden="true"><use href="#i-file"></use></svg><span data-i18n="openFile">打开文件</span></button>
<button class="btn btn-sm" type="button" id="sampleBtn"><svg class="icon" aria-hidden="true"><use href="#i-sample"></use></svg><span data-i18n="sample">示例</span></button>
<button class="btn btn-sm" type="button" data-clear="embedText"><svg class="icon" aria-hidden="true"><use href="#i-trash"></use></svg><span data-i18n="clear">清空</span></button>
</span>
</div>
<textarea id="embedText" rows="7" spellcheck="false" data-i18n-ph="originalTextPh" placeholder="粘贴或输入要加水印的原文……"></textarea>
</div>
<div class="field">
<div class="field-head">
<label for="embedMsg" data-i18n="wmMessage">水印消息</label>
<span class="counter" id="embedMsgCount"></span>
</div>
<textarea id="embedMsg" rows="3" spellcheck="false" data-i18n-ph="wmMessagePh" placeholder="要藏进文本里的信息，例如：© 2026 张三 · 文档编号 A-17"></textarea>
<p class="note note-warn hidden" id="msgLongWarn" data-i18n="msgLongWarn">消息较长：emoji 签名条建议 ≤140 字节，长消息请依赖隐形层检测。</p>
</div>
<div class="field">
<div class="field-head">
<label for="embedPw" data-i18n="password">密码（可选）</label>
</div>
<div class="pw-wrap">
<input id="embedPw" type="password" autocomplete="new-password" data-i18n-ph="passwordPh" placeholder="留空则不加密">
<button class="pw-toggle" type="button" data-pw-toggle="embedPw" aria-label="显示密码">
<svg class="icon" aria-hidden="true"><use href="#i-eye"></use></svg>
</button>
</div>
</div>
<div class="field">
<div class="field-head">
<span id="modeLabel" class="field-label" data-i18n="insertMode">隐形层插入方式</span>
</div>
<div class="choices" role="radiogroup" aria-labelledby="modeLabel">
<label class="choice">
<input type="radio" name="embedMode" value="end" checked>
<span class="choice-title" data-i18n="modeEnd">文末追加</span>
<span class="choice-desc" data-i18n="modeEndDesc">最短：只在文本末尾插入一份，适合整段复制的场景。</span>
</label>
<label class="choice">
<input type="radio" name="embedMode" value="paragraphs">
<span class="choice-title" data-i18n="modePara">分段嵌入</span>
<span class="choice-desc" data-i18n="modeParaDesc">每段末尾各放一份副本（最多 20 份），任一段落被单独复制也能解码。</span>
</label>
</div>
</div>
<label class="switch" for="embedEmoji">
<input type="checkbox" id="embedEmoji">
<span class="switch-track" aria-hidden="true"></span>
<span class="switch-text">
<span data-i18n="emojiLayer">附加 AI 可读 emoji 签名条</span>
<small data-i18n="emojiLayerDesc">文末追加一段 📜 开头的 emoji，任何 AI 按公开规范即可读出水印消息。</small>
</span>
</label>
<p class="note note-warn hidden" id="emojiPwWarn" data-i18n="emojiPwWarn">已设置密码：为保证机密性，emoji 签名条已自动关闭。</p>
<div class="btn-row">
<button id="embedBtn" class="btn btn-primary" type="button">
<svg class="icon" aria-hidden="true"><use href="#i-embed"></use></svg><span data-i18n="embedBtn">生成带水印文本</span>
</button>
<span class="counter kbd-hint" data-i18n="shortcutHint">⌘/Ctrl + Enter</span>
</div>
</div>
<div class="panel accent hidden" id="embedOutWrap">
<div class="panel-head">
<h2 class="panel-title" style="margin:0" data-i18n="output">输出（外观与原文一致）</h2>
</div>
<textarea id="embedOut" rows="7" readonly spellcheck="false"></textarea>
<div class="chips" id="embedStats"></div>
<div class="btn-row tight">
<button id="copyBtn" class="btn btn-primary" type="button">
<svg class="icon" aria-hidden="true"><use href="#i-copy"></use></svg><span data-i18n="copy">复制结果</span>
</button>
<button id="downloadBtn" class="btn" type="button">
<svg class="icon" aria-hidden="true"><use href="#i-download"></use></svg><span data-i18n="download">下载 .txt</span>
</button>
<button id="toDetectBtn" class="btn" type="button">
<svg class="icon" aria-hidden="true"><use href="#i-arrow-right"></use></svg><span data-i18n="toDetect">去检测验证</span>
</button>
</div>
</div>
</section>
<!-- ================= DETECT ================= -->
<section id="page-detect" class="page" role="tabpanel" aria-labelledby="tab-detect" tabindex="-1">
<div class="page-head">
<span class="page-num" aria-hidden="true">02</span>
<span class="page-kicker" aria-hidden="true">Detect</span>
<h1 class="page-title" data-i18n="detectTitle">检测与解码</h1>
<p class="page-lead" data-i18n="detectHint">粘贴任意文本，自动扫描隐形水印与 emoji 签名条并解码。</p>
</div>
<div class="panel">
<div class="field">
<div class="field-head">
<label for="detectText" data-i18n="detectInput">待检测文本</label>
<span class="counter" id="detectTextCount"></span>
<span class="field-tools">
<button class="btn btn-sm" type="button" data-paste="detectText"><svg class="icon" aria-hidden="true"><use href="#i-paste"></use></svg><span data-i18n="paste">粘贴</span></button>
<button class="btn btn-sm" type="button" data-file="detectText"><svg class="icon" aria-hidden="true"><use href="#i-file"></use></svg><span data-i18n="openFile">打开文件</span></button>
<button class="btn btn-sm" type="button" data-clear="detectText"><svg class="icon" aria-hidden="true"><use href="#i-trash"></use></svg><span data-i18n="clear">清空</span></button>
</span>
</div>
<textarea id="detectText" rows="8" spellcheck="false" data-i18n-ph="detectInputPh" placeholder="粘贴文本，自动开始检测……"></textarea>
</div>
<div class="field hidden" id="detectPwWrap">
<div class="field-head">
<label for="detectPw" data-i18n="detectPw">该水印已加密，请输入密码</label>
</div>
<div class="pw-wrap">
<input id="detectPw" type="password" autocomplete="off">
<button class="pw-toggle" type="button" data-pw-toggle="detectPw" aria-label="显示密码">
<svg class="icon" aria-hidden="true"><use href="#i-eye"></use></svg>
</button>
</div>
</div>
</div>
<div id="detectResult" aria-live="polite"></div>
</section>
<!-- ================= CLEAN ================= -->
<section id="page-clean" class="page" role="tabpanel" aria-labelledby="tab-clean" tabindex="-1">
<div class="page-head">
<span class="page-num" aria-hidden="true">03</span>
<span class="page-kicker" aria-hidden="true">Clean</span>
<h1 class="page-title" data-i18n="cleanTitle">清除水印</h1>
<p class="page-lead" data-i18n="cleanHint">移除文本中的 TextMark 水印（隐形层 + emoji 签名条），其余字符逐字保留 —— 表情自带的变体选择符（如 ❤️）不会被误删。加密水印无需密码也能清除。</p>
</div>
<div class="panel">
<div class="field">
<div class="field-head">
<label for="cleanText" data-i18n="cleanInput">待清理文本</label>
<span class="counter" id="cleanTextCount"></span>
<span class="field-tools">
<button class="btn btn-sm" type="button" data-paste="cleanText"><svg class="icon" aria-hidden="true"><use href="#i-paste"></use></svg><span data-i18n="paste">粘贴</span></button>
<button class="btn btn-sm" type="button" data-file="cleanText"><svg class="icon" aria-hidden="true"><use href="#i-file"></use></svg><span data-i18n="openFile">打开文件</span></button>
<button class="btn btn-sm" type="button" data-clear="cleanText"><svg class="icon" aria-hidden="true"><use href="#i-trash"></use></svg><span data-i18n="clear">清空</span></button>
</span>
</div>
<textarea id="cleanText" rows="8" spellcheck="false" data-i18n-ph="cleanInputPh" placeholder="粘贴要清除水印的文本……"></textarea>
</div>
<div class="btn-row">
<button id="cleanBtn" class="btn btn-primary" type="button">
<svg class="icon" aria-hidden="true"><use href="#i-clean"></use></svg><span data-i18n="cleanBtn">清除水印</span>
</button>
<span class="counter kbd-hint" data-i18n="shortcutHint">⌘/Ctrl + Enter</span>
</div>
</div>
<div class="panel accent hidden" id="cleanOutWrap">
<div class="panel-head">
<h2 class="panel-title" style="margin:0" data-i18n="cleanOutput">清理结果</h2>
</div>
<textarea id="cleanOut" rows="7" readonly spellcheck="false"></textarea>
<div class="chips" id="cleanStats"></div>
<div class="btn-row tight">
<button id="cleanCopyBtn" class="btn btn-primary" type="button">
<svg class="icon" aria-hidden="true"><use href="#i-copy"></use></svg><span data-i18n="copy">复制结果</span>
</button>
<button id="cleanDownloadBtn" class="btn" type="button">
<svg class="icon" aria-hidden="true"><use href="#i-download"></use></svg><span data-i18n="download">下载 .txt</span>
</button>
</div>
</div>
</section>
<!-- ================= SPEC ================= -->
<section id="page-spec" class="page" role="tabpanel" aria-labelledby="tab-spec" tabindex="-1">
<div class="page-head">
<span class="page-num" aria-hidden="true">04</span>
<span class="page-kicker" aria-hidden="true">Spec v1</span>
<h1 class="page-title" data-i18n="specTitle">公开规范</h1>
<p class="page-lead" data-i18n="specLead">编码规则完全公开：这里没有秘密算法，任何人、任何 AI 都能照着下面的规范把水印读出来。</p>
</div>
<div class="panel prose" id="specBody"></div>
<div class="panel">
<div class="panel-head">
<h2 class="panel-title" style="margin:0" data-i18n="specTableTitle">256-emoji 字节对照表</h2>
</div>
<p class="panel-hint" data-i18n="specTableHint">字节值 = emoji 在表中的序号（0–255）。顺序：U+1F600–U+1F64F（0–79）、U+1F300–U+1F37F（80–207）、U+1F380–U+1F3AF（208–255）。</p>
<div class="field">
<input id="emojiSearch" type="text" inputmode="search" data-i18n-ph="emojiSearchPh" placeholder="按字节值或 emoji 过滤，例如 84 或 😀">
</div>
<div id="emojiGrid" class="emoji-grid"></div>
</div>
<div class="panel">
<div class="panel-head">
<h2 class="panel-title" style="margin:0" data-i18n="specPromptTitle">给 AI 的解码提示词模板</h2>
</div>
<p class="panel-hint" data-i18n="specPromptHint">把带水印文本连同下面的提示词发给任何足够强的 AI，它就能读出 emoji 签名条里的水印消息。</p>
<pre id="aiPrompt" class="prompt-box"></pre>
<div class="btn-row tight">
<button id="copyPromptBtn" class="btn btn-primary" type="button">
<svg class="icon" aria-hidden="true"><use href="#i-copy"></use></svg><span data-i18n="copyPrompt">复制提示词</span>
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<footer>
<span data-i18n="footer">TextMark · 纯本地运行，无服务器，无网络请求 · 开源规范</span>
</footer>
<input type="file" id="filePicker" accept=".txt,.md,.markdown,.csv,.json,text/*" class="hidden">
<div class="toasts" id="toasts" aria-live="polite" aria-atomic="false"></div>
<script src="codec.js"></script>
<script src="app.js"></script>
</body>
</html>