diff --git a/src/main/overlay.ts b/src/main/overlay.ts
index c29d094..0a14bf0 100644
--- a/src/main/overlay.ts
+++ b/src/main/overlay.ts
@@ -1,9 +1,83 @@
 import { BrowserWindow, ipcMain, screen } from "electron";
+import fs from "node:fs";
+import path from "node:path";
+import { app } from "electron";
 
 let overlayWindow: BrowserWindow | null = null;
 
+function writeOverlayHtml(): string {
+  const dir = path.join(app.getPath("temp"), "rpa-studio-overlay");
+  fs.mkdirSync(dir, { recursive: true });
+  const file = path.join(dir, "overlay.html");
+  const html = `<!DOCTYPE html>
+<html><head><style>
+*{margin:0;padding:0;box-sizing:border-box;user-select:none;-webkit-user-select:none}
+body{width:320px;height:56px;background:#1E2530;color:#E8ECF2;font-family:'Segoe UI',sans-serif;display:flex;align-items:center;padding:0 12px;gap:10px;overflow:hidden;border-radius:8px;border:1px solid #3A4556}
+.spinner{width:14px;height:14px;border:2px solid #4A90D9;border-top-color:transparent;border-radius:50%;animation:spin .8s linear infinite;flex-shrink:0}
+@keyframes spin{to{transform:rotate(360deg)}}
+.info{flex:1;min-width:0}
+.step{font-size:11px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:#B8C4D4}
+.progress-bar{height:3px;background:#3A4556;border-radius:2px;margin-top:4px;overflow:hidden}
+.progress-fill{height:100%;background:#4A90D9;border-radius:2px;transition:width .3s ease}
+.meta{font-size:10px;color:#7A8898;flex-shrink:0;white-space:nowrap}
+.stop-btn{background:#3A2028;color:#E05252;border:1px solid #5A3038;border-radius:4px;padding:4px 8px;font-size:10px;cursor:pointer;flex-shrink:0}
+.stop-btn:hover{background:#4A2830}
+</style></head><body>
+<div class="spinner" id="spin"></div>
+<div class="info">
+  <div class="step" id="step">准备运行…</div>
+  <div class="progress-bar"><div class="progress-fill" id="fill" style="width:0%"></div></div>
+</div>
+<div class="meta" id="meta">0/0</div>
+<button class="stop-btn" id="stopBtn" onclick="stopRun()">停止</button>
+<script>
+const { ipcRenderer } = require("electron");
+let done = 0, total = 0, startTime = Date.now();
+let timer = setInterval(function() {
+  var s = Math.floor((Date.now() - startTime) / 1000);
+  document.getElementById("meta").textContent = done + "/" + total + " · " + s + "s";
+}, 1000);
+
+ipcRenderer.on("run:event", function(_e, ev) {
+  if (ev.type === "node.started" && ev.nodeLabel) {
+    document.getElementById("step").textContent = ev.nodeLabel;
+  }
+  if (ev.type === "run.started") { startTime = Date.now(); }
+  if (ev.type === "run.total" && ev.total) { total = ev.total; }
+  if (ev.type === "node.finished") { done++; updateBar(); }
+  if (ev.type === "run.finished") {
+    clearInterval(timer);
+    document.getElementById("spin").style.display = "none";
+    var fill = document.getElementById("fill");
+    fill.style.background = ev.status === "succeeded" ? "#4CAF50" : "#E05252";
+    fill.style.width = "100%";
+    document.getElementById("step").textContent =
+      ev.status === "succeeded" ? "✓ 运行成功" :
+      ev.status === "failed" ? "✗ 运行失败" : "已取消";
+    document.getElementById("stopBtn").textContent = "关闭";
+    document.getElementById("stopBtn").onclick = function() { ipcRenderer.send("overlay:close"); };
+    setTimeout(function() { ipcRenderer.send("overlay:close"); }, ev.status === "succeeded" ? 3000 : 10000);
+  }
+});
+
+function updateBar() {
+  var pct = total > 0 ? Math.round(done / total * 100) : 0;
+  document.getElementById("fill").style.width = pct + "%";
+  document.getElementById("meta").textContent = done + "/" + total;
+}
+
+function stopRun() { ipcRenderer.send("overlay:stop"); }
+</script>
+</body></html>`;
+  fs.writeFileSync(file, html, "utf8");
+  return file;
+}
+
 export function showRunOverlay(mainWindow: BrowserWindow | null): void {
-  if (mainWindow && !mainWindow.isDestroyed()) mainWindow.minimize();
+  if (mainWindow && !mainWindow.isDestroyed()) {
+    mainWindow.minimize();
+    mainWindow.setProgressBar(0);
+  }
 
   if (overlayWindow && !overlayWindow.isDestroyed()) {
     overlayWindow.show();
@@ -30,9 +104,7 @@ export function showRunOverlay(mainWindow: BrowserWindow | null): void {
     skipTaskbar: true,
     alwaysOnTop: true,
     fullscreenable: false,
-    enableLargerThanScreen: false,
     hasShadow: true,
-    transparent: false,
     backgroundColor: "#1E2530",
     webPreferences: {
       contextIsolation: false,
@@ -41,73 +113,16 @@ export function showRunOverlay(mainWindow: BrowserWindow | null): void {
     }
   });
   overlayWindow.setAlwaysOnTop(true, "screen-saver");
-
-  const html = `<!DOCTYPE html>
-<html><head><style>
-*{margin:0;padding:0;box-sizing:border-box;user-select:none;-webkit-user-select:none}
-body{width:320px;height:56px;background:#1E2530;color:#E8ECF2;font-family:-apple-system,'Segoe UI',sans-serif;display:flex;align-items:center;padding:0 12px;gap:10px;overflow:hidden;border-radius:8px;border:1px solid #3A4556}
-.spinner{width:14px;height:14px;border:2px solid #4A90D9;border-top-color:transparent;border-radius:50%;animation:spin .8s linear infinite;flex-shrink:0}
-@keyframes spin{to{transform:rotate(360deg)}}
-.info{flex:1;min-width:0}
-.step{font-size:11px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:#B8C4D4}
-.progress-bar{height:3px;background:#3A4556;border-radius:2px;margin-top:4px;overflow:hidden}
-.progress-fill{height:100%;background:#4A90D9;border-radius:2px;transition:width .3s ease}
-.meta{font-size:10px;color:#7A8898;flex-shrink:0;white-space:nowrap}
-.stop-btn{background:#3A2028;color:#E05252;border:1px solid #5A3038;border-radius:4px;padding:4px 8px;font-size:10px;cursor:pointer;flex-shrink:0}
-.stop-btn:hover{background:#4A2830}
-</style></head><body>
-<div class="spinner" id="spin"></div>
-<div class="info">
-  <div class="step" id="step">\u51C6\u5907\u8FD0\u884C\u2026</div>
-  <div class="progress-bar"><div class="progress-fill" id="fill" style="width:0%"></div></div>
-</div>
-<div class="meta" id="meta">0/0</div>
-<button class="stop-btn" id="stopBtn" onclick="stopRun()">\u505C\u6B62</button>
-<script>
-const { ipcRenderer } = require("electron");
-let done = 0, total = 0, startTime = Date.now();
-let timer = setInterval(() => {
-  const s = Math.floor((Date.now() - startTime) / 1000);
-  document.getElementById("meta").textContent = done + "/" + total + " \u00B7 " + s + "s";
-}, 1000);
-
-ipcRenderer.on("run:event", (_e, ev) => {
-  if (ev.type === "node.started" && ev.nodeLabel) {
-    document.getElementById("step").textContent = ev.nodeLabel;
-  }
-  if (ev.type === "run.started") { startTime = Date.now(); }
-  if (ev.type === "run.total" && ev.total) {
-    total = ev.total;
-  }
-  if (ev.type === "node.finished" || ev.type === "node.skipped") {
-    done++;
-    const pct = total > 0 ? Math.round(done / total * 100) : 0;
-    document.getElementById("fill").style.width = pct + "%";
-    document.getElementById("meta").textContent = done + "/" + total;
-  }
-  if (ev.type === "run.finished") {
-    clearInterval(timer);
-    document.getElementById("spin").style.display = "none";
-    const fill = document.getElementById("fill");
-    fill.style.background = ev.status === "succeeded" ? "#4CAF50" : "#E05252";
-    fill.style.width = "100%";
-    document.getElementById("step").textContent =
-      ev.status === "succeeded" ? "\u2713 \u8FD0\u884C\u6210\u529F" :
-      ev.status === "failed" ? "\u2717 \u8FD0\u884C\u5931\u8D25" : "\u5DF2\u53D6\u6D88";
-    document.getElementById("stopBtn").textContent = "\u5173\u95ED";
-    document.getElementById("stopBtn").onclick = () => { ipcRenderer.send("overlay:close"); };
-    setTimeout(() => { ipcRenderer.send("overlay:close"); }, ev.status === "succeeded" ? 3000 : 10000);
-  }
-});
-
-function stopRun() {
-  ipcRenderer.send("overlay:stop");
-}
-</scr` + `ipt>
-</body></html>`;
-
-  overlayWindow.loadURL(`data:text/html;charset=utf-8,${encodeURIComponent(html)}`);
   overlayWindow.show();
+
+  const file = writeOverlayHtml();
+  overlayWindow.loadFile(file);
+}
+
+export function updateOverlayProgress(ratio: number): void {
+  if (overlayWindow && !overlayWindow.isDestroyed()) {
+    overlayWindow.setProgressBar(ratio >= 1 ? -1 : Math.max(0, Math.min(1, ratio)));
+  }
 }
 
 export function hideRunOverlay(mainWindow: BrowserWindow | null): void {
@@ -115,7 +130,10 @@ export function hideRunOverlay(mainWindow: BrowserWindow | null): void {
     overlayWindow.close();
     overlayWindow = null;
   }
-  if (mainWindow && !mainWindow.isDestroyed()) mainWindow.restore();
+  if (mainWindow && !mainWindow.isDestroyed()) {
+    mainWindow.setProgressBar(-1);
+    mainWindow.restore();
+  }
 }
 
 export function registerOverlayIpc(