diff --git a/face_analysis/hairline_grow.py b/face_analysis/hairline_grow.py
index 10957cd..269b274 100644
--- a/face_analysis/hairline_grow.py
+++ b/face_analysis/hairline_grow.py
@@ -598,7 +598,7 @@ _REPAINT_WORKFLOW = os.path.join(os.path.dirname(os.path.dirname(__file__)), "ha
 
 
 def _call_comfyui(image_bgr, mask_bool, prompt=None):
-    """调本机 ComfyUI 的 Flux-2 inpaint 工作流（hair_repaint.json），返回与输入同分辨率的 BGR。
+    """调远端 ComfyUI 的 Flux-2 inpaint 工作流（hair_repaint.json），返回与输入同分辨率的 BGR。
 
     与 swapHair 的区别：ComfyUI 把「原图 VAE 编码作 reference latent + ColorMatch」双重保色，
     天生不易染色；提示词自由可调（中文）。mask 经 RGBA alpha 通道传入（透明=重绘区）。
@@ -606,10 +606,10 @@ def _call_comfyui(image_bgr, mask_bool, prompt=None):
     """
     import io
     from hairline.mask import compose_comfy_rgba
-    from hairline.comfyui import run as comfyui_run, ping
+    from hairline.comfyui import COMFYUI_URL, run as comfyui_run, ping
 
     if not ping():
-        raise SwapError("ComfyUI 不可达（http://127.0.0.1:8188），redraw Flux-2 路跳过")
+        raise SwapError(f"ComfyUI 不可达（{COMFYUI_URL}），redraw Flux-2 路跳过")
     mask_u8 = (mask_bool.astype(np.uint8)) * 255
     rgba_img = compose_comfy_rgba(image_bgr, mask_u8)   # alpha=255-mask：透明=重绘区
     buf = io.BytesIO()
diff --git a/hairline/comfyui.py b/hairline/comfyui.py
index 8c1b02a..ace4b0b 100644
--- a/hairline/comfyui.py
+++ b/hairline/comfyui.py
@@ -1,8 +1,9 @@
 """ComfyUI 客户端：用 add_hair.json / add_hair2.json 工作流跑生发图（Flux-2 inpaint）。
 
-worker 不跑 Flux，只把「划线图 + 遮罩」的 RGBA 上传到本机 ComfyUI(默认 8188)，
+worker 不跑 Flux，只把「划线图 + 遮罩」的 RGBA 上传到远端 ComfyUI
+（默认 http://10.60.74.221:8188，可用环境变量 COMFYUI_URL 覆盖），
 替换工作流节点 26 的输入图、随机 seed，提交 /prompt，轮询 /history，取回 /view 输出。
-ComfyUI 开启了 HTTP Basic Auth（user `admin` + 密码），所有请求都带凭据。
+ComfyUI 若开启了 HTTP Basic Auth（user `admin` + 密码），所有请求都带凭据。
 
 支持多工作流：run() 可通过 workflow_path 指定不同工作流 JSON，自动检测 SaveImage 输出节点。
 """
@@ -17,7 +18,7 @@ import uuid
 
 import httpx
 
-COMFYUI_URL = os.getenv("COMFYUI_URL", "http://127.0.0.1:8188").rstrip("/")
+COMFYUI_URL = os.getenv("COMFYUI_URL", "http://10.60.74.221:8188").rstrip("/")
 _WORKFLOW_DEFAULT = os.getenv(
     "ADD_HAIR_WORKFLOW",
     os.path.join(os.path.dirname(os.path.dirname(__file__)), "add_hair.json"),
diff --git a/static/img_downscale.js b/static/img_downscale.js
new file mode 100644
index 0000000..f01502f
--- /dev/null
+++ b/static/img_downscale.js
@@ -0,0 +1,55 @@
+// 上传图片自动降采样：当总像素 > MAX_PIXELS 时，等比例缩小到 <= TARGET_PIXELS。
+// 用法：在提交前 file = await window.downscaleImageFile(file);
+(function () {
+  var MAX_PIXELS = 1536000;    // 触发阈值：超过则缩小
+  var TARGET_PIXELS = 786432;  // 缩小后总像素上限
+
+  function loadImage(url) {
+    return new Promise(function (resolve, reject) {
+      var img = new Image();
+      img.onload = function () { resolve(img); };
+      img.onerror = reject;
+      img.src = url;
+    });
+  }
+
+  async function downscaleImageFile(file) {
+    // 非图片、GIF、SVG 不处理，原样返回
+    if (!file || !file.type || file.type.indexOf('image/') !== 0) return file;
+    if (file.type === 'image/gif' || file.type === 'image/svg+xml') return file;
+
+    var url = URL.createObjectURL(file);
+    try {
+      var img = await loadImage(url);
+      var w = img.naturalWidth, h = img.naturalHeight;
+      var total = w * h;
+      if (!total || total <= MAX_PIXELS) return file;  // 未超阈值，原图直接用
+
+      var scale = Math.sqrt(TARGET_PIXELS / total);
+      var nw = Math.max(1, Math.round(w * scale));
+      var nh = Math.max(1, Math.round(h * scale));
+
+      var canvas = document.createElement('canvas');
+      canvas.width = nw;
+      canvas.height = nh;
+      var ctx = canvas.getContext('2d');
+      ctx.drawImage(img, 0, 0, nw, nh);
+
+      var outType = file.type === 'image/png' ? 'image/png' : 'image/jpeg';
+      var quality = outType === 'image/jpeg' ? 0.92 : undefined;
+      var blob = await new Promise(function (res) { canvas.toBlob(res, outType, quality); });
+      if (!blob) return file;
+
+      var base = (file.name || 'image').replace(/\.(jpe?g|png|webp|bmp)$/i, '');
+      var name = base + (outType === 'image/png' ? '.png' : '.jpg');
+      return new File([blob], name, { type: outType, lastModified: Date.now() });
+    } catch (e) {
+      console.warn('downscaleImageFile 失败，使用原图', e);
+      return file;
+    } finally {
+      URL.revokeObjectURL(url);
+    }
+  }
+
+  window.downscaleImageFile = downscaleImageFile;
+})();
diff --git a/static/test_interface1.html b/static/test_interface1.html
index edfa976..ebd5605 100644
--- a/static/test_interface1.html
+++ b/static/test_interface1.html
@@ -62,6 +62,7 @@
   @media (max-width: 768px) { .results { flex-direction: column; } }
   .hidden { display: none !important; }
 </style>
+<script src="/static/img_downscale.js"></script>
 </head>
 <body>
 <div class="container">
@@ -127,8 +128,9 @@ function setStatus(text, type) {
 
 async function submitTest() {
   const fileInput = $('imageFile');
-  const file = fileInput.files[0];
+  let file = fileInput.files[0];
   if (!file) { setStatus('请先选择一张图片', 'error'); return; }
+  file = await window.downscaleImageFile(file);
 
   const _reqStart = performance.now();
 
diff --git a/static/test_interface10.html b/static/test_interface10.html
index 72f088a..6550344 100644
--- a/static/test_interface10.html
+++ b/static/test_interface10.html
@@ -50,6 +50,7 @@
   .lightbox { position: fixed; inset: 0; background: rgba(0,0,0,.85); display: none; align-items: center; justify-content: center; z-index: 50; cursor: zoom-out; }
   .lightbox img { max-width: 95%; max-height: 95%; }
 </style>
+<script src="/static/img_downscale.js"></script>
 </head>
 <body>
 <div class="container">
@@ -197,8 +198,9 @@ function renderMetrics(data) {
 }
 
 async function submitTest() {
-  const file = $('imageFile').files[0];
+  let file = $('imageFile').files[0];
   if (!file) { setStatus('请先选择一张图片', 'error'); return; }
+  file = await window.downscaleImageFile(file);
 
   const t0 = performance.now();
   const btn = $('submitBtn');
diff --git a/static/test_interface11.html b/static/test_interface11.html
index fb7cc21..8966b7c 100644
--- a/static/test_interface11.html
+++ b/static/test_interface11.html
@@ -55,6 +55,7 @@
   .lightbox { position: fixed; inset: 0; background: rgba(0,0,0,.85); display: none; align-items: center; justify-content: center; z-index: 50; cursor: zoom-out; }
   .lightbox img { max-width: 95%; max-height: 95%; }
 </style>
+<script src="/static/img_downscale.js"></script>
 </head>
 <body>
 <div class="container">
@@ -292,8 +293,9 @@ function renderResult(d) {
 }
 
 async function submitTest() {
-  const file = $('imageFile').files[0];
+  let file = $('imageFile').files[0];
   if (!file) { setStatus('请先选择一张图片', 'error'); return; }
+  file = await window.downscaleImageFile(file);
   const t0 = performance.now();
   const btn = $('submitBtn');
   btn.disabled = true; btn.textContent = '⏳ 请求中...';
diff --git a/static/test_interface11_debug.html b/static/test_interface11_debug.html
index 2eda948..68c5179 100644
--- a/static/test_interface11_debug.html
+++ b/static/test_interface11_debug.html
@@ -53,6 +53,7 @@
   .lightbox { position: fixed; inset: 0; background: rgba(0,0,0,.85); display: none; align-items: center; justify-content: center; z-index: 50; cursor: zoom-out; }
   .lightbox img { max-width: 95%; max-height: 95%; }
 </style>
+<script src="/static/img_downscale.js"></script>
 </head>
 <body>
 <div class="container">
@@ -287,8 +288,9 @@ function renderResult(d) {
 }
 
 async function submitTest() {
-  const file = $('imageFile').files[0];
+  let file = $('imageFile').files[0];
   if (!file) { setStatus('请先选择图片', 'error'); return; }
+  file = await window.downscaleImageFile(file);
   // 页面隐藏但仍提交的固定默认值
   const HIDDEN = {
     seg_model: 'segformer',
diff --git a/static/test_interface12.html b/static/test_interface12.html
index 5425443..30b132c 100644
--- a/static/test_interface12.html
+++ b/static/test_interface12.html
@@ -49,6 +49,7 @@
   .lightbox img { max-width: 95%; max-height: 95%; }
   .hidden { display: none; }
 </style>
+<script src="/static/img_downscale.js"></script>
 </head>
 <body>
 <div class="container">
@@ -243,8 +244,9 @@ function renderResult(d) {
 }
 
 async function submitTest() {
-  const file = $('imageFile').files[0];
+  let file = $('imageFile').files[0];
   if (!file) { setStatus('请先选择图片', 'error'); return; }
+  file = await window.downscaleImageFile(file);
   // 页面隐藏但仍提交的固定默认值
   const HIDDEN = {
     seg_model: 'segformer',
diff --git a/static/test_interface12_final.html b/static/test_interface12_final.html
index 334c5a9..e710574 100644
--- a/static/test_interface12_final.html
+++ b/static/test_interface12_final.html
@@ -37,6 +37,7 @@
   .lightbox img { max-width: 95%; max-height: 95%; }
   .hidden { display: none; }
 </style>
+<script src="/static/img_downscale.js"></script>
 </head>
 <body>
 <div class="container">
@@ -131,8 +132,9 @@ function dataUriToBlob(dataUri) {
 }
 
 async function submitTest() {
-  const file = $('imageFile').files[0];
+  let file = $('imageFile').files[0];
   if (!file) { setStatus('请先选择图片', 'error'); return; }
+  file = await window.downscaleImageFile(file);
 
   const btn = $('submitBtn');
   btn.disabled = true; btn.textContent = '⏳ 生成中...';
diff --git a/static/test_interface12_final_v2.html b/static/test_interface12_final_v2.html
index 450216b..059efd5 100644
--- a/static/test_interface12_final_v2.html
+++ b/static/test_interface12_final_v2.html
@@ -37,6 +37,7 @@
   .lightbox img { max-width: 95%; max-height: 95%; }
   .hidden { display: none; }
 </style>
+<script src="/static/img_downscale.js"></script>
 </head>
 <body>
 <div class="container">
@@ -100,8 +101,9 @@ function renderResult(d) {
 }
 
 async function submitTest() {
-  const file = $('imageFile').files[0];
+  let file = $('imageFile').files[0];
   if (!file) { setStatus('请先选择图片', 'error'); return; }
+  file = await window.downscaleImageFile(file);
 
   const btn = $('submitBtn');
   btn.disabled = true; btn.textContent = '⏳ 重绘中...';
diff --git a/static/test_interface2.html b/static/test_interface2.html
index 3806dbb..35cad4c 100644
--- a/static/test_interface2.html
+++ b/static/test_interface2.html
@@ -69,6 +69,7 @@
 
   .hidden { display: none !important; }
 </style>
+<script src="/static/img_downscale.js"></script>
 </head>
 <body>
 <div class="container">
@@ -140,9 +141,9 @@ function $(id) { return document.getElementById(id); }
 function setStatus(t, type) { const b=$('statusBar'); b.textContent=t; b.className='status '+type; }
 
 async function submitTest() {
-  const f = $('imageFile').files[0];
+  let f = $('imageFile').files[0];
   if (!f) { setStatus('请选择图片', 'error'); return; }
-
+  f = await window.downscaleImageFile(f);
 
   _origUrl = URL.createObjectURL(f);
   $('submitBtn').disabled = true; $('submitBtn').textContent = '⏳ 请求中...';
diff --git a/static/test_interface3.html b/static/test_interface3.html
index 7cfc6e4..9e40d5c 100644
--- a/static/test_interface3.html
+++ b/static/test_interface3.html
@@ -71,6 +71,7 @@
 
   @media (max-width: 800px) { .results-layout, .preview-row { flex-direction: column; } }
 </style>
+<script src="/static/img_downscale.js"></script>
 </head>
 <body>
 <div class="container">
@@ -139,9 +140,9 @@ function $(id) { return document.getElementById(id); }
 function setStatus(t, type) { const b=$('statusBar'); b.textContent=t; b.className='status '+type; }
 
 async function submitTest() {
-  const mf = $('markedFile').files[0];
+  let mf = $('markedFile').files[0];
   if (!mf) { setStatus('请选择划线图', 'error'); return; }
-
+  mf = await window.downscaleImageFile(mf);
 
   const markedUrl = URL.createObjectURL(mf);
   // 先显示原图
diff --git a/static/test_interface4.html b/static/test_interface4.html
index a5d395d..822d77c 100644
--- a/static/test_interface4.html
+++ b/static/test_interface4.html
@@ -57,6 +57,7 @@
 
   @media (max-width: 800px) { .results-layout { flex-direction: column; } }
 </style>
+<script src="/static/img_downscale.js"></script>
 </head>
 <body>
 <div class="container">
@@ -121,8 +122,9 @@ function $(id) { return document.getElementById(id); }
 function setStatus(t, type) { const b=$('statusBar'); b.textContent=t; b.className='status '+type; }
 
 async function submitTest() {
-  const f = $('imageFile').files[0];
+  let f = $('imageFile').files[0];
   if (!f) { setStatus('请选择图片', 'error'); return; }
+  f = await window.downscaleImageFile(f);
 
   $('imgPreview').innerHTML = '<img src="'+URL.createObjectURL(f)+'" alt="preview">';
   $('submitBtn').disabled = true; $('submitBtn').textContent = '⏳ 分析中...';
diff --git a/static/test_interface5.html b/static/test_interface5.html
index 6151c0d..acf6dff 100644
--- a/static/test_interface5.html
+++ b/static/test_interface5.html
@@ -88,6 +88,7 @@
   .hidden { display: none !important; }
   @media (max-width: 800px) { .results-layout { flex-direction: column; } }
 </style>
+<script src="/static/img_downscale.js"></script>
 </head>
 <body>
 <div class="container">
@@ -195,10 +196,11 @@ function selectAllHair(select) {
 }
 
 async function submitTest() {
-  const f = $('imageFile').files[0];
+  let f = $('imageFile').files[0];
   if (!f) { setStatus('请选择图片', 'error'); return; }
   const checked = [...document.querySelectorAll('#hairStyleGroup input:checked')].map(cb => cb.value);
   if (!checked.length) { setStatus('请至少选择一个发型', 'error'); return; }
+  f = await window.downscaleImageFile(f);
 
   _origUrl = URL.createObjectURL(f);
   $('submitBtn').disabled = true; $('submitBtn').textContent = '⏳ ...';
diff --git a/static/test_interface6.html b/static/test_interface6.html
index 2d3370b..e679dda 100644
--- a/static/test_interface6.html
+++ b/static/test_interface6.html
@@ -59,6 +59,7 @@
   .diff-list { font-size: 12px; color: #6b7280; margin-top: 6px; line-height: 1.7; }
   .diff-list li { margin-left: 18px; }
 </style>
+<script src="/static/img_downscale.js"></script>
 </head>
 <body>
 <div class="container">
@@ -129,8 +130,9 @@ function setStatus(text, type) {
 
 async function submitTest() {
   const fileInput = $('imageFile');
-  const file = fileInput.files[0];
+  let file = fileInput.files[0];
   if (!file) { setStatus('请先选择一张图片', 'error'); return; }
+  file = await window.downscaleImageFile(file);
 
   const _reqStart = performance.now();
 
diff --git a/static/test_interface7.html b/static/test_interface7.html
index f916a59..3f25061 100644
--- a/static/test_interface7.html
+++ b/static/test_interface7.html
@@ -66,6 +66,7 @@
 
   .badge-v2 { background: #7c3aed; color: #fff; font-size: 11px; padding: 2px 8px; border-radius: 10px; margin-left: 6px; vertical-align: middle; }
 </style>
+<script src="/static/img_downscale.js"></script>
 </head>
 <body>
 <div class="container">
@@ -137,9 +138,9 @@ function $(id) { return document.getElementById(id); }
 function setStatus(t, type) { const b=$('statusBar'); b.textContent=t; b.className='status '+type; }
 
 async function submitTest() {
-  const f = $('imageFile').files[0];
+  let f = $('imageFile').files[0];
   if (!f) { setStatus('请选择图片', 'error'); return; }
-
+  f = await window.downscaleImageFile(f);
 
   _origUrl = URL.createObjectURL(f);
   $('submitBtn').disabled = true; $('submitBtn').textContent = '⏳ 请求中...';
diff --git a/static/test_interface9.html b/static/test_interface9.html
index d14fcb0..70cfdc1 100644
--- a/static/test_interface9.html
+++ b/static/test_interface9.html
@@ -51,6 +51,7 @@
   .lightbox { position: fixed; inset: 0; background: rgba(0,0,0,.85); display: none; align-items: center; justify-content: center; z-index: 50; cursor: zoom-out; }
   .lightbox img { max-width: 95%; max-height: 95%; }
 </style>
+<script src="/static/img_downscale.js"></script>
 </head>
 <body>
 <div class="container">
@@ -194,8 +195,9 @@ function renderMetrics(data) {
 }
 
 async function submitTest() {
-  const file = $('imageFile').files[0];
+  let file = $('imageFile').files[0];
   if (!file) { setStatus('请先选择一张图片', 'error'); return; }
+  file = await window.downscaleImageFile(file);
 
   const t0 = performance.now();
   const btn = $('submitBtn');