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+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+<meta charset="UTF-8">
+<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
+<title>封面工作室 · 语言驱动排版设计</title>
+<meta name="description" content="输入文字，自动排版，生成封面。开源免费，无需GPU。">
+<style>
+:root {
+  --bg: #0a0e27;
+  --surface: #111636;
+  --border: #1e2a4a;
+  --text: #c8d6e5;
+  --text-muted: #6b7d99;
+  --accent: #4f8cff;
+  --accent-glow: #00d4ff;
+  --danger: #ff4757;
+  --success: #2ed573;
+  --radius: 12px;
+}
+
+* { margin: 0; padding: 0; box-sizing: border-box; }
+
+body {
+  background: var(--bg);
+  color: var(--text);
+  font-family: -apple-system, 'PingFang SC', 'Noto Sans SC', sans-serif;
+  min-height: 100vh;
+  line-height: 1.6;
+}
+
+/* ── Header ── */
+.header {
+  text-align: center;
+  padding: 48px 24px 32px;
+}
+
+.header h1 {
+  font-size: 36px;
+  font-weight: 800;
+  background: linear-gradient(135deg, var(--accent), var(--accent-glow));
+  -webkit-background-clip: text;
+  -webkit-text-fill-color: transparent;
+  background-clip: text;
+  letter-spacing: 2px;
+  margin-bottom: 8px;
+}
+
+.header .desc {
+  font-size: 16px;
+  color: var(--text-muted);
+}
+
+.header .badges {
+  margin-top: 16px;
+  display: flex;
+  gap: 10px;
+  justify-content: center;
+  flex-wrap: wrap;
+}
+
+.badge {
+  display: inline-block;
+  padding: 4px 14px;
+  font-size: 12px;
+  border-radius: 20px;
+  border: 1px solid var(--border);
+  color: var(--text-muted);
+  letter-spacing: 1px;
+}
+
+/* ── Main Layout ── */
+.main {
+  max-width: 1200px;
+  margin: 0 auto;
+  padding: 0 24px 80px;
+  display: grid;
+  grid-template-columns: 1fr 1fr;
+  gap: 32px;
+}
+
+@media (max-width: 900px) {
+  .main {
+    grid-template-columns: 1fr;
+  }
+}
+
+/* ── Panel ── */
+.panel {
+  background: var(--surface);
+  border-radius: var(--radius);
+  border: 1px solid var(--border);
+  padding: 28px;
+}
+
+.panel-title {
+  font-size: 14px;
+  font-weight: 700;
+  text-transform: uppercase;
+  letter-spacing: 2px;
+  color: var(--text-muted);
+  margin-bottom: 20px;
+  display: flex;
+  align-items: center;
+  gap: 8px;
+}
+
+.panel-title::before {
+  content: '';
+  display: block;
+  width: 4px;
+  height: 16px;
+  background: var(--accent);
+  border-radius: 2px;
+}
+
+/* ── Form ── */
+.form-group {
+  margin-bottom: 18px;
+}
+
+.form-group label {
+  display: block;
+  font-size: 13px;
+  color: var(--text-muted);
+  margin-bottom: 6px;
+  letter-spacing: 1px;
+}
+
+.form-group input,
+.form-group textarea,
+.form-group select {
+  width: 100%;
+  padding: 12px 16px;
+  background: var(--bg);
+  border: 1px solid var(--border);
+  border-radius: 8px;
+  color: var(--text);
+  font-size: 15px;
+  font-family: inherit;
+  transition: border-color 0.2s;
+}
+
+.form-group input:focus,
+.form-group textarea:focus,
+.form-group select:focus {
+  outline: none;
+  border-color: var(--accent);
+  box-shadow: 0 0 0 3px rgba(79, 140, 255, 0.1);
+}
+
+.form-group textarea {
+  min-height: 180px;
+  resize: vertical;
+  line-height: 1.7;
+}
+
+.form-row {
+  display: grid;
+  grid-template-columns: 1fr 1fr;
+  gap: 12px;
+}
+
+/* ── Preset Selector ── */
+.preset-grid {
+  display: grid;
+  grid-template-columns: repeat(5, 1fr);
+  gap: 8px;
+  margin-bottom: 18px;
+}
+
+.preset-btn {
+  padding: 10px 6px;
+  border: 2px solid transparent;
+  border-radius: 8px;
+  cursor: pointer;
+  text-align: center;
+  font-size: 12px;
+  color: var(--text-muted);
+  background: var(--bg);
+  transition: all 0.2s;
+  font-family: inherit;
+}
+
+.preset-btn:hover {
+  border-color: var(--border);
+  color: var(--text);
+}
+
+.preset-btn.active {
+  border-color: var(--accent);
+  color: var(--accent);
+  background: rgba(79, 140, 255, 0.08);
+}
+
+/* ── Generate Button ── */
+.generate-btn {
+  width: 100%;
+  padding: 14px 24px;
+  background: linear-gradient(135deg, var(--accent), #3d6fd9);
+  color: #fff;
+  border: none;
+  border-radius: 10px;
+  font-size: 16px;
+  font-weight: 700;
+  cursor: pointer;
+  letter-spacing: 2px;
+  transition: all 0.2s;
+  font-family: inherit;
+}
+
+.generate-btn:hover {
+  transform: translateY(-1px);
+  box-shadow: 0 8px 30px rgba(79, 140, 255, 0.3);
+}
+
+.generate-btn:disabled {
+  opacity: 0.5;
+  cursor: not-allowed;
+  transform: none;
+  box-shadow: none;
+}
+
+.generate-btn .spinner {
+  display: none;
+  width: 16px;
+  height: 16px;
+  border: 2px solid #fff;
+  border-top-color: transparent;
+  border-radius: 50%;
+  animation: spin 0.6s linear infinite;
+  margin-right: 8px;
+  vertical-align: middle;
+}
+
+.generate-btn.loading .spinner { display: inline-block; }
+.generate-btn.loading .btn-text { display: none; }
+
+@keyframes spin { to { transform: rotate(360deg); } }
+
+/* ── Preview ── */
+.preview-area {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  min-height: 400px;
+}
+
+.preview-placeholder {
+  text-align: center;
+  color: var(--text-muted);
+  padding: 60px 20px;
+}
+
+.preview-placeholder .icon {
+  font-size: 64px;
+  margin-bottom: 16px;
+  opacity: 0.3;
+}
+
+.preview-placeholder .text {
+  font-size: 15px;
+  line-height: 1.8;
+}
+
+.preview-img {
+  max-width: 100%;
+  max-height: 500px;
+  border-radius: 8px;
+  border: 1px solid var(--border);
+  display: none;
+}
+
+.preview-img.show { display: block; }
+
+/* ── Download Button ── */
+.download-bar {
+  display: none;
+  margin-top: 16px;
+  width: 100%;
+  text-align: center;
+}
+
+.download-bar.show { display: block; }
+
+.download-btn {
+  display: inline-block;
+  padding: 10px 28px;
+  background: var(--surface);
+  color: var(--accent);
+  border: 1px solid var(--accent);
+  border-radius: 8px;
+  text-decoration: none;
+  font-size: 14px;
+  font-weight: 600;
+  cursor: pointer;
+  letter-spacing: 1px;
+  transition: all 0.2s;
+}
+
+.download-btn:hover {
+  background: rgba(79, 140, 255, 0.1);
+}
+
+/* ── Loading ── */
+.loading-dots {
+  display: flex;
+  gap: 8px;
+  justify-content: center;
+  padding: 40px;
+}
+.loading-dots span {
+  width: 10px;
+  height: 10px;
+  border-radius: 50%;
+  background: var(--accent);
+  animation: dot 1.2s ease-in-out infinite;
+}
+.loading-dots span:nth-child(2) { animation-delay: 0.2s; }
+.loading-dots span:nth-child(3) { animation-delay: 0.4s; }
+@keyframes dot { 0%,80%,100% { transform: scale(0.6); opacity: 0.3; } 40% { transform: scale(1); opacity: 1; } }
+
+/* ── Error ── */
+.error-msg {
+  display: none;
+  padding: 12px 16px;
+  background: rgba(255, 71, 87, 0.1);
+  border: 1px solid var(--danger);
+  border-radius: 8px;
+  color: var(--danger);
+  font-size: 13px;
+  margin-top: 12px;
+}
+.error-msg.show { display: block; }
+
+/* ── Footer ── */
+.footer {
+  text-align: center;
+  padding: 32px 24px;
+  font-size: 13px;
+  color: var(--text-muted);
+  opacity: 0.5;
+  letter-spacing: 1px;
+}
+
+.footer a {
+  color: var(--accent);
+  text-decoration: none;
+}
+
+.footer .divider {
+  margin: 0 8px;
+  opacity: 0.3;
+}
+</style>
+</head>
+<body>
+
+<header class="header">
+  <h1>封面工作室</h1>
+  <p class="desc">语言驱动排版设计 · 输入文字，自动生成封面</p>
+  <div class="badges">
+    <span class="badge">开源免费</span>
+    <span class="badge">无需GPU</span>
+    <span class="badge">一键部署</span>
+    <span class="badge">MIT协议</span>
+  </div>
+</header>
+
+<div class="main">
+
+  <!-- 左侧：输入面板 -->
+  <div class="panel" id="inputPanel">
+    <div class="panel-title">📝 内容输入</div>
+
+    <div class="form-group">
+      <label for="templateSelect">模板</label>
+      <select id="templateSelect"></select>
+    </div>
+
+    <div class="form-group">
+      <label>预设风格</label>
+      <div class="preset-grid" id="presetGrid"></div>
+    </div>
+
+    <div class="form-row">
+      <div class="form-group">
+        <label for="layoutSelect">布局</label>
+        <select id="layoutSelect">
+          <option value="default">标准排版</option>
+          <option value="hero">大标题封面</option>
+          <option value="quote">金句居中</option>
+        </select>
+      </div>
+      <div class="form-group">
+        <label for="tagInput">标签（可选）</label>
+        <input type="text" id="tagInput" placeholder="例如：教程 · 干货">
+      </div>
+    </div>
+
+    <div class="form-group">
+      <label for="titleInput">标题</label>
+      <input type="text" id="titleInput" placeholder="标题将作为封面大标题">
+    </div>
+
+    <div class="form-group">
+      <label for="bodyInput">正文（支持 Markdown 列表和加粗）</label>
+      <textarea id="bodyInput" placeholder="输入正文内容...&#10;&#10;支持格式：&#10;- 列表项用 - 或 • 开头&#10;## 小标题用 ## 开头&#10;**加粗文字** 用双星号包裹&#10;&#10;无需GPU · 语言驱动排版 · 开源免费&#10;一行命令部署到你的服务器&#10;支持多种风格和模板"></textarea>
+    </div>
+
+    <button class="generate-btn" id="genBtn" onclick="doGenerate()">
+      <span class="spinner"></span>
+      <span class="btn-text">⚡ 生成封面</span>
+    </button>
+
+    <div class="error-msg" id="errorMsg"></div>
+  </div>
+
+  <!-- 右侧：预览面板 -->
+  <div class="panel" id="previewPanel">
+    <div class="panel-title">👁️ 预览</div>
+    <div class="preview-area" id="previewArea">
+      <div class="preview-placeholder" id="placeholder">
+        <div class="icon">🎨</div>
+        <div class="text">
+          在左侧输入内容<br>
+          选择模板和风格<br>
+          点击「生成封面」
+        </div>
+      </div>
+      <div class="loading-dots" id="loadingDots" style="display:none">
+        <span></span><span></span><span></span>
+      </div>
+      <img class="preview-img" id="previewImg" alt="封面预览">
+      <div class="download-bar" id="downloadBar">
+        <a class="download-btn" id="downloadLink" href="#" download>💾 下载封面 (PNG)</a>
+      </div>
+    </div>
+  </div>
+
+</div>
+
+<footer class="footer">
+  <span>铸渊封面工作室 v2.0</span>
+  <span class="divider">·</span>
+  <span>开源协议 <a href="#" target="_blank">MIT</a></span>
+  <span class="divider">·</span>
+  <span>代码仓库 <a href="https://guanghulab.com/code/bingshuo/guanghulab" target="_blank">guanghulab.com</a></span>
+</footer>
+
+<script>
+// ── State ──
+let templates = []
+let currentTemplate = null
+let currentPreset = 'tech'
+let currentLayout = 'default'
+
+// ── Init ──
+async function init() {
+  try {
+    const res = await fetch('/api/templates')
+    templates = await res.json()
+    renderTemplateSelect()
+    selectTemplate(templates[0]?.id)
+
+    // 快速填充示例内容
+    document.getElementById('titleInput').value = '零基础手搓AI封面生成器'
+    document.getElementById('bodyInput').value =
+      '不需要GPU · 不花一分钱 · 语言驱动自动排版\n\n' +
+      '- **零成本** 纯 HTML/CSS 排版渲染，无需 AI 绘画模型\n' +
+      '- **极轻量** 2GB 内存就能跑，一行命令部署\n' +
+      '- **语言驱动** 输入文字，自动分析内容类型和情绪，推荐配色和布局\n' +
+      '- **开源免费** MIT 协议，代码完全公开\n' +
+      '- **可扩展** 模板注册表机制，新增模板零改动核心代码'
+  } catch (e) {
+    console.error('加载模板失败:', e)
+    showError('无法加载模板列表，请检查服务器连接')
+  }
+}
+
+function renderTemplateSelect() {
+  const sel = document.getElementById('templateSelect')
+  sel.innerHTML = templates.map(t =>
+    `<option value="${t.id}">${t.icon} ${t.name} — ${t.description}</option>`
+  ).join('')
+  sel.onchange = () => selectTemplate(sel.value)
+}
+
+function selectTemplate(id) {
+  currentTemplate = templates.find(t => t.id === id)
+  if (!currentTemplate) return
+  currentPreset = currentTemplate.presets?.[0]?.id || 'tech'
+  renderPresets()
+  document.getElementById('templateSelect').value = id
+}
+
+function renderPresets() {
+  const grid = document.getElementById('presetGrid')
+  const presets = currentTemplate?.presets || []
+  grid.innerHTML = presets.map(p =>
+    `<button class="preset-btn ${p.id === currentPreset ? 'active' : ''}"
+       onclick="selectPreset('${p.id}')">${p.name}</button>`
+  ).join('')
+}
+
+function selectPreset(id) {
+  currentPreset = id
+  renderPresets()
+}
+
+// ── Generate ──
+async function doGenerate() {
+  const title = document.getElementById('titleInput').value.trim()
+  const body = document.getElementById('bodyInput').value.trim()
+  const tag = document.getElementById('tagInput').value.trim()
+  const layout = document.getElementById('layoutSelect').value
+
+  if (!title && !body) {
+    showError('请至少输入标题或正文内容')
+    return
+  }
+
+  setLoading(true)
+  hideError()
+
+  try {
+    const res = await fetch('/api/generate', {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({
+        templateId: currentTemplate?.id,
+        presetId: currentPreset,
+        title,
+        body,
+        tag,
+        layout,
+      }),
+    })
+
+    if (!res.ok) {
+      const err = await res.json()
+      throw new Error(err.error || '生成失败')
+    }
+
+    const data = await res.json()
+    showPreview(data.url || data.urls[0])
+  } catch (e) {
+    showError(e.message || '生成失败，请稍后重试')
+    setLoading(false)
+  }
+}
+
+function setLoading(loading) {
+  const btn = document.getElementById('genBtn')
+  const dots = document.getElementById('loadingDots')
+  const placeholder = document.getElementById('placeholder')
+  const img = document.getElementById('previewImg')
+  const bar = document.getElementById('downloadBar')
+
+  if (loading) {
+    btn.classList.add('loading')
+    btn.disabled = true
+    placeholder.style.display = 'none'
+    img.classList.remove('show')
+    bar.classList.remove('show')
+    dots.style.display = 'flex'
+  } else {
+    btn.classList.remove('loading')
+    btn.disabled = false
+    dots.style.display = 'none'
+  }
+}
+
+function showPreview(url) {
+  setLoading(false)
+  const placeholder = document.getElementById('placeholder')
+  const img = document.getElementById('previewImg')
+  const bar = document.getElementById('downloadBar')
+  const link = document.getElementById('downloadLink')
+
+  placeholder.style.display = 'none'
+  img.src = url
+  img.classList.add('show')
+  bar.classList.add('show')
+  link.href = url
+}
+
+function showError(msg) {
+  const el = document.getElementById('errorMsg')
+  el.textContent = msg
+  el.classList.add('show')
+}
+
+function hideError() {
+  document.getElementById('errorMsg').classList.remove('show')
+}
+
+// ── Keyboard shortcut ──
+document.addEventListener('keydown', (e) => {
+  if ((e.metaKey || e.ctrlKey) && e.key === 'Enter') {
+    doGenerate()
+  }
+})
+
+// ── Start ──
+init()
+</script>
+</body>
+</html>
