diff --git a/Dockerfile b/Dockerfile
index acf247a..d8b2a9b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -18,5 +18,28 @@ RUN --mount=type=cache,target=/root/.cache/pip \
 
 COPY . .
 
+# 可选：构建时自动拉取远端仓库最新代码覆盖工作目录（默认关闭）。
+# 放在 COPY 之后，避免影响依赖层缓存；仅在你显式开启时才会触发网络更新。
+# 用法示例：
+# docker compose build \
+#   --build-arg GIT_AUTO_UPDATE=1 \
+#   --build-arg GIT_REMOTE_URL=https://github.com/you/repo.git \
+#   --build-arg GIT_REF=main
+ARG GIT_AUTO_UPDATE=0
+ARG GIT_REMOTE_URL=
+ARG GIT_REF=main
+RUN if [ "$GIT_AUTO_UPDATE" = "1" ] && [ -n "$GIT_REMOTE_URL" ]; then \
+      set -eux; \
+      apt-get update; \
+      apt-get install -y --no-install-recommends git ca-certificates; \
+      rm -rf /var/lib/apt/lists/*; \
+      tmpdir="$(mktemp -d)"; \
+      git clone --depth=1 --branch "$GIT_REF" "$GIT_REMOTE_URL" "$tmpdir/repo"; \
+      cp -a "$tmpdir/repo/." /app/; \
+      rm -rf "$tmpdir"; \
+    else \
+      echo "Skip remote code update (GIT_AUTO_UPDATE=0 or GIT_REMOTE_URL empty)"; \
+    fi
+
 EXPOSE 8000
 CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8000"]
diff --git a/app/static/app.js b/app/static/app.js
index 234a804..00bae9b 100644
--- a/app/static/app.js
+++ b/app/static/app.js
@@ -51,32 +51,6 @@ async function postJSON(url, body) {
   return data;
 }
 
-function renderTrace(trace, headerRid) {
-  const wrap = $("traceWrap");
-  const pre = $("traceJson");
-  const badge = $("traceBadge");
-  if (!pre || !wrap) return;
-
-  if (!trace || Object.keys(trace).length === 0) {
-    pre.textContent = headerRid
-      ? JSON.stringify({ request_id: headerRid, note: "响应中无 trace 字段" }, null, 2)
-      : "（尚无数据）完成一次「AI 改写」后，这里会显示请求 ID、耗时、质检与降级原因。";
-    if (badge) badge.textContent = "";
-    return;
-  }
-
-  const merged = { ...trace };
-  if (headerRid && !merged.request_id) merged.request_id = headerRid;
-  pre.textContent = JSON.stringify(merged, null, 2);
-
-  const mode = merged.mode || "";
-  if (badge) {
-    badge.textContent = mode === "ai" ? "AI" : mode === "fallback" ? "保底" : "";
-    badge.className = "trace-badge " + (mode === "ai" ? "is-ai" : mode === "fallback" ? "is-fallback" : "");
-  }
-  wrap.open = true;
-}
-
 $("rewriteBtn").addEventListener("click", async () => {
   const sourceText = $("sourceText").value.trim();
   if (sourceText.length < 20) {
@@ -99,7 +73,6 @@ $("rewriteBtn").addEventListener("click", async () => {
     $("summary").value = data.summary || "";
     $("body").value = data.body_markdown || "";
     updateCounters();
-    renderTrace(data.trace, data._requestId);
     const tr = data.trace || {};
     const modelLine = tr.model ? `模型 ${tr.model}` : "";
     if (data.mode === "fallback") {
@@ -193,32 +166,4 @@ $("imBtn").addEventListener("click", async () => {
   $(id).addEventListener("input", updateCounters);
 });
 
-async function loadBackendConfig() {
-  const el = $("backendConfig");
-  if (!el) return;
-  try {
-    const res = await fetch("/api/config");
-    const c = await res.json();
-    if (!c.openai_configured) {
-      el.textContent =
-        "后端未配置 OPENAI_API_KEY：改写将使用本地保底稿，千问不会参与。请在 .env 中配置并重启容器。";
-      el.style.color = "#b42318";
-      return;
-    }
-    const name =
-      c.provider === "dashscope"
-        ? "通义千问（DashScope 兼容接口）"
-        : "OpenAI 兼容接口";
-    const host = c.base_url_host ? ` · ${c.base_url_host}` : "";
-    const to = c.openai_timeout_sec != null ? ` · 单轮最长等待 ${c.openai_timeout_sec}s` : "";
-    el.textContent = `已接入：${c.openai_model} · ${name}${host}${to}`;
-    el.style.color = "";
-  } catch (e) {
-    el.textContent = "无法读取 /api/config（请确认服务已启动）";
-    el.style.color = "#b42318";
-  }
-}
-
-loadBackendConfig();
 updateCounters();
-renderTrace(null, "");
diff --git a/app/static/style.css b/app/static/style.css
index f6cdf7a..ec5bb8e 100644
--- a/app/static/style.css
+++ b/app/static/style.css
@@ -1,11 +1,12 @@
 :root {
-  --bg: #f3f7f5;
+  --bg: #ecfeff;
   --panel: #ffffff;
-  --line: #d7e3dd;
-  --text: #1a3128;
-  --muted: #5e7a6f;
-  --accent: #18794e;
-  --accent-2: #0f5f3d;
+  --line: #d9eef2;
+  --text: #164e63;
+  --muted: #457386;
+  --accent: #0891b2;
+  --accent-2: #0e7490;
+  --accent-soft: #f0fdff;
 }
 
 * {
@@ -14,17 +15,18 @@
 
 body {
   margin: 0;
-  background: radial-gradient(circle at 10% 20%, #e6f4ec, transparent 35%),
-    radial-gradient(circle at 90% 80%, #dff0ff, transparent 30%),
-    var(--bg);
+  background: var(--bg);
   color: var(--text);
-  font-family: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
+  font-family: Inter, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
+  height: 100vh;
+  overflow: hidden;
 }
 
 .topbar {
-  max-width: 1280px;
-  margin: 20px auto 0;
-  padding: 0 16px;
+  max-width: 1240px;
+  height: 72px;
+  margin: 0 auto;
+  padding: 0 20px;
   display: flex;
   justify-content: space-between;
   align-items: center;
@@ -32,42 +34,43 @@ body {
 
 .brand h1 {
   margin: 0;
+  font-size: 32px;
+  letter-spacing: -0.02em;
 }
 
 .brand .muted {
   margin: 6px 0 0;
 }
 
-.backend-config {
-  margin: 8px 0 0;
-  line-height: 1.5;
-}
-
 .badge {
   font-size: 12px;
   font-weight: 700;
-  color: #0f5f3d;
-  background: #eaf7f0;
-  border: 1px solid #cde6d7;
+  color: #fafafa;
+  background: var(--accent-2);
+  border: 1px solid var(--accent-2);
   padding: 5px 10px;
   border-radius: 999px;
 }
 
 .layout {
-  max-width: 1280px;
-  margin: 14px auto 24px;
-  padding: 0 16px;
+  max-width: 1240px;
+  height: calc(100vh - 72px);
+  margin: 0 auto;
+  padding: 0 20px;
   display: grid;
-  grid-template-columns: 1fr 1fr;
-  gap: 16px;
+  grid-template-columns: minmax(320px, 42%) 1fr;
+  gap: 12px;
+  overflow: hidden;
 }
 
 .panel {
   background: var(--panel);
   border: 1px solid var(--line);
-  border-radius: 14px;
-  padding: 18px;
-  box-shadow: 0 8px 24px rgba(32, 84, 55, 0.07);
+  border-radius: 12px;
+  padding: 14px;
+  box-shadow: 0 6px 24px rgba(8, 145, 178, 0.08);
+  min-height: 0;
+  overflow: hidden;
 }
 
 h1,
@@ -75,16 +78,25 @@ h2 {
   margin-top: 0;
 }
 
+.panel-head {
+  margin-bottom: 10px;
+}
+
+.panel-head h2 {
+  margin: 0;
+  font-size: 18px;
+}
+
 .muted {
   color: var(--muted);
-  margin-top: -6px;
+  margin-top: 2px;
 }
 
 label {
   display: block;
-  margin-top: 10px;
-  margin-bottom: 6px;
-  font-size: 14px;
+  margin-top: 8px;
+  margin-bottom: 4px;
+  font-size: 13px;
   font-weight: 600;
 }
 
@@ -105,8 +117,8 @@ button {
   width: 100%;
   border-radius: 10px;
   border: 1px solid var(--line);
-  padding: 10px 12px;
-  font-size: 14px;
+  padding: 8px 10px;
+  font-size: 13px;
   transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
 }
 
@@ -118,13 +130,13 @@ textarea {
 input:focus,
 textarea:focus {
   outline: none;
-  border-color: #8ec6aa;
-  box-shadow: 0 0 0 3px rgba(24, 121, 78, 0.12);
+  border-color: #7dd3e7;
+  box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.15);
 }
 
 button {
   cursor: pointer;
-  margin-top: 12px;
+  margin-top: 8px;
   font-weight: 700;
 }
 
@@ -142,6 +154,22 @@ button.primary:hover {
   background: var(--accent-2);
 }
 
+button.secondary {
+  background: #fff;
+  color: var(--text);
+  border-color: var(--line);
+}
+
+button.secondary:hover {
+  background: #f8fdff;
+}
+
+.subtle-btn {
+  background: #fff;
+  border-color: #a5dae6;
+  color: var(--accent-2);
+}
+
 button:disabled {
   cursor: not-allowed;
   opacity: 0.65;
@@ -173,67 +201,29 @@ button:disabled {
 }
 
 .status {
-  min-height: 22px;
-  margin-top: 8px;
+  min-height: 18px;
+  margin-top: 6px;
   color: var(--accent-2);
-  font-weight: 600;
+  font-weight: 500;
+  font-size: 12px;
 }
 
 .small {
-  font-size: 13px;
-  margin: 0 0 12px;
-}
-
-.flow-hint {
-  margin: 0 0 14px 18px;
-  padding: 0;
-  font-size: 13px;
-  line-height: 1.6;
-}
-
-.trace-wrap {
-  margin-top: 12px;
-  padding: 10px 12px;
-  border: 1px dashed var(--line);
-  border-radius: 10px;
-  background: #f9fbf9;
-}
-
-.trace-wrap summary {
-  cursor: pointer;
-  font-weight: 700;
-  color: var(--text);
-}
-
-.trace-badge {
-  margin-left: 8px;
-  font-size: 11px;
-  padding: 2px 8px;
-  border-radius: 999px;
-  font-weight: 700;
-}
-
-.trace-badge.is-ai {
-  background: #eaf7f0;
-  color: #0f5f3d;
-  border: 1px solid #cde6d7;
-}
-
-.trace-badge.is-fallback {
-  background: #fff4e6;
-  color: #9a3412;
-  border: 1px solid #fed7aa;
+  font-size: 12px;
+  margin: 0 0 6px;
 }
 
 .body-split {
   display: grid;
-  grid-template-columns: 1fr 1fr;
-  gap: 12px;
+  grid-template-columns: 1fr 0.9fr;
+  gap: 10px;
   align-items: stretch;
+  min-height: 0;
 }
 
 .body-split textarea {
-  min-height: 280px;
+  min-height: 170px;
+  max-height: 240px;
 }
 
 .preview-panel {
@@ -244,10 +234,10 @@ button:disabled {
 
 .markdown-preview {
   flex: 1;
-  min-height: 280px;
-  max-height: 480px;
+  min-height: 170px;
+  max-height: 240px;
   overflow: auto;
-  padding: 12px 14px;
+  padding: 10px 12px;
   border: 1px solid var(--line);
   border-radius: 10px;
   background: #fafcfb;
@@ -258,7 +248,7 @@ button:disabled {
 .markdown-preview h2 {
   font-size: 1.15rem;
   margin: 1em 0 0.5em;
-  color: var(--accent-2);
+  color: #111827;
 }
 
 .markdown-preview h3 {
@@ -280,23 +270,14 @@ button:disabled {
   margin: 0.25em 0;
 }
 
-.trace-json {
-  margin: 10px 0 0;
-  padding: 10px;
-  max-height: 220px;
-  overflow: auto;
-  font-size: 11px;
-  line-height: 1.45;
-  background: #fff;
-  border-radius: 8px;
-  border: 1px solid var(--line);
-  white-space: pre-wrap;
-  word-break: break-word;
-}
-
 @media (max-width: 960px) {
+  body {
+    overflow: auto;
+  }
+
   .layout {
     grid-template-columns: 1fr;
+    height: auto;
   }
 
   .body-split {
diff --git a/app/templates/index.html b/app/templates/index.html
index 55e37ac..4b66746 100644
--- a/app/templates/index.html
+++ b/app/templates/index.html
@@ -10,27 +10,22 @@
     <header class="topbar">
       <div class="brand">
         <h1>{{ app_name }}</h1>
-        <p class="muted">粘贴原文 → 洗成约 <strong>5 段、500 字内</strong> 的短文（无小标题）→ 右侧预览 → 满意后发布。</p>
-        <p id="backendConfig" class="backend-config muted small" aria-live="polite"></p>
+        <p class="muted">从原文到公众号草稿，一页完成改写、封面和发布。</p>
       </div>
-      <div class="badge">Beta</div>
+      <div class="badge">Studio</div>
     </header>
 
     <main class="layout">
       <section class="panel input-panel">
-        <h2>输入与改写策略</h2>
-        <ol class="flow-hint muted">
-          <li>粘贴原文并设置语气/读者</li>
-          <li>点击改写 → 右侧为短标题、摘要与<strong>五段正文</strong>（段落间空一行）</li>
-          <li>看「运行追踪」：<strong>模式为 AI</strong> 且模型名正确，即千问/接口已生效</li>
-          <li>人工改好后 →「发布到公众号草稿箱」（需配置 WECHAT_*）</li>
-        </ol>
+        <div class="panel-head">
+          <h2>内容输入</h2>
+        </div>
 
         <div class="field-head">
-          <label>原始内容</label>
+          <label>内容</label>
           <span id="sourceCount" class="meta">0 字</span>
         </div>
-        <textarea id="sourceText" rows="14" placeholder="粘贴原文（长帖、线程、摘录均可），洗稿会围绕原文主题展开…"></textarea>
+        <textarea id="sourceText" rows="9" placeholder="粘贴原文（长帖、线程、摘录均可），洗稿会围绕原文主题展开…"></textarea>
 
         <div class="grid2">
           <div>
@@ -62,8 +57,9 @@
       </section>
 
       <section class="panel output-panel">
-        <h2>发布内容</h2>
-        <p class="muted small">下方「运行追踪」会显示本次请求 ID、耗时、质检项与是否降级，便于与容器日志对照。</p>
+        <div class="panel-head">
+          <h2>发布内容</h2>
+        </div>
 
         <label>标题</label>
         <input id="title" type="text" />
@@ -72,12 +68,12 @@
           <label>摘要</label>
           <span id="summaryCount" class="meta">0 字</span>
         </div>
-        <textarea id="summary" rows="3"></textarea>
+        <textarea id="summary" rows="2"></textarea>
 
         <label>公众号封面（可选上传）</label>
         <div class="cover-tools">
           <input id="coverFile" type="file" accept="image/png,image/jpeg,image/jpg,image/webp" />
-          <button id="coverUploadBtn" type="button">上传封面并绑定</button>
+          <button id="coverUploadBtn" class="subtle-btn" type="button">上传封面并绑定</button>
         </div>
         <input id="thumbMediaId" type="text" placeholder="thumb_media_id（上传后自动填充，也可手动粘贴）" />
         <p id="coverHint" class="muted small">未上传时将使用后端默认封面策略。</p>
@@ -87,24 +83,19 @@
           <span id="bodyCount" class="meta">0 字</span>
         </div>
         <div class="body-split">
-          <textarea id="body" rows="10" placeholder="五段之间空一行；无需 # 标题"></textarea>
+          <textarea id="body" rows="7" placeholder="五段之间空一行；无需 # 标题"></textarea>
           <div class="preview-panel">
             <div class="field-head">
               <label>排版预览</label>
-              <span class="meta">与公众号 HTML 渲染接近</span>
+              <span class="meta">实时同步</span>
             </div>
             <div id="bodyPreview" class="markdown-preview"></div>
           </div>
         </div>
 
-        <details id="traceWrap" class="trace-wrap">
-          <summary>运行追踪 <span id="traceBadge" class="trace-badge"></span></summary>
-          <pre id="traceJson" class="trace-json"></pre>
-        </details>
-
         <div class="actions">
-          <button id="wechatBtn">发布到公众号草稿箱</button>
-          <button id="imBtn">发送到 IM</button>
+          <button id="wechatBtn" class="primary">发布到公众号草稿箱</button>
+          <button id="imBtn" class="secondary">发送到 IM</button>
         </div>
       </section>
     </main>