diff --git a/SKILL.md b/SKILL.md
index 144572e..fd9b211 100644
--- a/SKILL.md
+++ b/SKILL.md
@@ -43,9 +43,12 @@ See [references/presenter-mode.md](references/presenter-mode.md) for the full au
 2. **每页 150–300 字** — 2–3 分钟/页的节奏
 3. **用口语，不用书面语** — "因此"→"所以"，"该方案"→"这个方案"
 
-All full-deck templates technically support the S key presenter view (it's built into `runtime.js`), but only `presenter-mode-reveal` is designed from the ground up around the feature with proper example 逐字稿 on every slide.
+All full-deck templates support the S key presenter view (it's built into `runtime.js`). **S opens a separate popup window** — the original page stays as the audience view, and the popup shows current/next slide (CSS scale at 1920×1080 design resolution, pixel-perfect) + large speaker script + timer. The two windows sync navigation via BroadcastChannel.
 
-Keyboard in presenter mode: `S` toggle · `T` cycle theme · `← →` navigate · `R` reset timer · `Esc` close.
+Only `presenter-mode-reveal` is designed from the ground up around the feature with proper example 逐字稿 on every slide.
+
+Keyboard in presenter window: `← →` navigate (syncs audience) · `R` reset timer · `Esc` close popup.
+Keyboard in audience window: `S` open presenter · `T` cycle theme · `← →` navigate (syncs presenter) · `F` fullscreen · `O` overview.
 
 ## Before you author anything — ALWAYS ask or recommend
 
@@ -194,9 +197,9 @@ capture, runtime.js exposes `#/N` deep-links, and render.sh iterates 1..N.
 ```
 ←  →  Space  PgUp  PgDn  Home  End    navigate
 F                                       fullscreen
-S                                       presenter view (current + next + script + timer)
-N                                       quick notes drawer (bottom, legacy)
-R                                       reset timer (only in presenter view)
+S                                       open presenter window (new popup: current + next + script + timer)
+N                                       quick notes drawer (bottom overlay)
+R                                       reset timer (in presenter window)
 O                                       slide overview grid
 T                                       cycle themes (reads data-themes attr)
 A                                       cycle demo animation on current slide
diff --git a/assets/base.css b/assets/base.css
index 6efa679..b8c1107 100644
--- a/assets/base.css
+++ b/assets/base.css
@@ -132,45 +132,10 @@ h4,.h4{font-size:22px;line-height:1.3;font-weight:600;margin:0 0 8px}
 .overview .thumb .t{position:absolute;bottom:10px;left:14px;right:14px;font-weight:600;color:var(--text-1)}
 
 /* ================= PRESENTER VIEW ================= */
-/* Split-view presenter mode: current slide + next preview + speaker script + timer.
- * Toggle with S key. Hides the audience deck, shows this view only to presenter. */
-.presenter-view{position:fixed;inset:0;z-index:80;display:none;
-  background:#0a0e1a;color:#e6edf3;font-family:var(--font-sans);
-  grid-template-columns:1.35fr 1fr;gap:20px;padding:20px}
-.presenter-view.open{display:grid}
-body.presenter-mode .deck,
-body.presenter-mode .progress-bar,
-body.presenter-mode .deck-header,
-body.presenter-mode .deck-footer,
-body.presenter-mode .notes-overlay{display:none!important}
-.pv-label{font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:#8b949e;
-  margin-bottom:8px;font-weight:600}
-.pv-main{display:flex;flex-direction:column;min-height:0}
-.pv-stage{flex:1;background:var(--bg,#0d1117);border:1px solid rgba(255,255,255,.08);
-  border-radius:14px;overflow:hidden;position:relative}
-.pv-stage .slide{position:absolute;inset:0;transform:none!important;opacity:1!important;
-  width:100%;height:100%}
-.pv-side{display:flex;flex-direction:column;gap:14px;min-height:0}
-.pv-next{flex:0 0 30%;display:flex;flex-direction:column;min-height:0}
-.pv-next-stage{border:1px solid rgba(255,255,255,.06);border-radius:10px;opacity:.85}
-.pv-next .pv-end{display:flex;align-items:center;justify-content:center;height:100%;
-  font-size:18px;color:#8b949e;letter-spacing:.12em}
-.pv-notes{flex:1;display:flex;flex-direction:column;min-height:0;
-  background:rgba(255,255,255,.02);border:1px solid rgba(255,255,255,.06);
-  border-radius:12px;padding:16px 20px}
-.pv-notes-body{flex:1;overflow:auto;font-size:18px;line-height:1.75;color:#d0d7de;
-  padding-right:6px;font-family:var(--font-sans)}
-.pv-notes-body p{margin:0 0 .8em 0}
-.pv-notes-body strong{color:#f0883e}
-.pv-notes-body em{color:#58a6ff;font-style:normal}
-.pv-empty{color:#484f58;font-style:italic}
-.pv-bar{display:flex;align-items:center;gap:16px;padding:10px 14px;
-  background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.06);
-  border-radius:10px;font-size:13px;color:#8b949e}
-.pv-timer{font-family:var(--font-mono,monospace);font-size:22px;font-weight:700;color:#3fb950;
-  letter-spacing:.04em}
-.pv-count{font-weight:600;color:#e6edf3}
-.pv-hint{margin-left:auto;font-size:11px;color:#6e7681;letter-spacing:.08em}
+/* Presenter view opens in a separate popup window (S key).
+ * All presenter styles are self-contained in the popup HTML generated by runtime.js.
+ * The audience window (this file) is NOT affected — it stays as normal deck view.
+ * Only the .notes class below is needed to hide speaker notes from audience. */
 
 /* ================= UTILITY ================= */
 .hidden{display:none!important}
diff --git a/assets/runtime.js b/assets/runtime.js
index e706d3f..1afea73 100644
--- a/assets/runtime.js
+++ b/assets/runtime.js
@@ -4,8 +4,10 @@
  * Features:
  *   ← → / space / PgUp PgDn / Home End  navigation
  *   F  fullscreen
- *   S  presenter mode (split view: current + next + notes + timer)
- *   N  quick notes overlay (bottom drawer, legacy)
+ *   S  presenter mode (opens a NEW WINDOW with current/next slide preview + notes + timer)
+ *       The original window stays as audience view, synced via BroadcastChannel.
+ *       Slide previews use CSS transform:scale() at design resolution for pixel-perfect layout.
+ *   N  quick notes overlay (bottom drawer)
  *   O  slide overview grid
  *   T  cycle themes (reads data-themes on <html> or <body>)
  *   A  cycle demo animation on current slide
@@ -32,7 +34,15 @@
     let idx = 0;
     const total = slides.length;
 
-    // progress bar
+    /* ===== BroadcastChannel for presenter sync ===== */
+    const CHANNEL_NAME = 'html-ppt-presenter-' + (location.pathname + location.search);
+    let bc;
+    try { bc = new BroadcastChannel(CHANNEL_NAME); } catch(e) { bc = null; }
+
+    // Are we running inside the presenter popup?
+    const isPresenterWindow = location.hash.indexOf('__presenter__') !== -1;
+
+    /* ===== progress bar ===== */
     let bar = document.querySelector('.progress-bar');
     if (!bar) {
       bar = document.createElement('div');
@@ -42,7 +52,7 @@
     }
     const barFill = bar.querySelector('span');
 
-    // notes overlay
+    /* ===== notes overlay (N key) ===== */
     let notes = document.querySelector('.notes-overlay');
     if (!notes) {
       notes = document.createElement('div');
@@ -50,7 +60,7 @@
       document.body.appendChild(notes);
     }
 
-    // overview
+    /* ===== overview grid (O key) ===== */
     let overview = document.querySelector('.overview');
     if (!overview) {
       overview = document.createElement('div');
@@ -67,7 +77,8 @@
       document.body.appendChild(overview);
     }
 
-    function go(n){
+    /* ===== navigation ===== */
+    function go(n, fromRemote){
       n = Math.max(0, Math.min(total-1, n));
       slides.forEach((s,i) => {
         s.classList.toggle('is-active', i===n);
@@ -77,13 +88,17 @@
       barFill.style.width = ((n+1)/total*100)+'%';
       const numEl = document.querySelector('.slide-number');
       if (numEl) { numEl.setAttribute('data-current', n+1); numEl.setAttribute('data-total', total); }
-      // notes (bottom overlay, legacy N key)
+
+      // notes (bottom overlay)
       const note = slides[n].querySelector('.notes, aside.notes, .speaker-notes');
       notes.innerHTML = note ? note.innerHTML : '';
-      // presenter view live update
-      renderPresenter(n);
+
       // hash
-      if (location.hash !== '#/'+(n+1)) history.replaceState(null,'','#/'+(n+1));
+      const hashTarget = '#/'+(n+1);
+      if (location.hash !== hashTarget && !isPresenterWindow) {
+        history.replaceState(null,'', hashTarget);
+      }
+
       // re-trigger entry animations
       slides[n].querySelectorAll('[data-anim]').forEach(el => {
         const a = el.getAttribute('data-anim');
@@ -91,6 +106,7 @@
         void el.offsetWidth;
         el.classList.add('anim-'+a);
       });
+
       // counter-up
       slides[n].querySelectorAll('.counter').forEach(el => {
         const target = parseFloat(el.getAttribute('data-to')||el.textContent);
@@ -105,102 +121,235 @@
         }
         requestAnimationFrame(tick);
       });
+
+      // Broadcast to other window (audience ↔ presenter)
+      if (!fromRemote && bc) {
+        bc.postMessage({ type: 'go', idx: n });
+      }
+    }
+
+    /* ===== listen for remote navigation ===== */
+    if (bc) {
+      bc.onmessage = function(e) {
+        if (e.data && e.data.type === 'go' && typeof e.data.idx === 'number') {
+          go(e.data.idx, true);
+        }
+      };
     }
 
     function toggleNotes(force){ notes.classList.toggle('open', force!==undefined?force:!notes.classList.contains('open')); }
     function toggleOverview(force){ overview.classList.toggle('open', force!==undefined?force:!overview.classList.contains('open')); }
 
-    // ========== PRESENTER MODE ==========
-    // Split view: current slide (left) + next slide thumb + large speaker notes + timer
-    let presenter = document.querySelector('.presenter-view');
-    if (!presenter) {
-      presenter = document.createElement('div');
-      presenter.className = 'presenter-view';
-      presenter.innerHTML = ''
-        + '<div class="pv-main">'
-        +   '<div class="pv-label">CURRENT</div>'
-        +   '<div class="pv-stage" id="pv-stage"></div>'
-        + '</div>'
-        + '<div class="pv-side">'
-        +   '<div class="pv-next">'
-        +     '<div class="pv-label">NEXT</div>'
-        +     '<div class="pv-stage pv-next-stage" id="pv-next"></div>'
-        +   '</div>'
-        +   '<div class="pv-notes">'
-        +     '<div class="pv-label">SPEAKER SCRIPT · 逐字稿</div>'
-        +     '<div class="pv-notes-body" id="pv-notes-body"></div>'
-        +   '</div>'
-        +   '<div class="pv-bar">'
-        +     '<div class="pv-timer" id="pv-timer">00:00</div>'
-        +     '<div class="pv-count" id="pv-count">1 / ' + total + '</div>'
-        +     '<div class="pv-hint">S 退出 · ← → 翻页 · R 重置计时</div>'
-        +   '</div>'
-        + '</div>';
-      document.body.appendChild(presenter);
-    }
-    const pvStage = presenter.querySelector('#pv-stage');
-    const pvNext  = presenter.querySelector('#pv-next');
-    const pvBody  = presenter.querySelector('#pv-notes-body');
-    const pvTimer = presenter.querySelector('#pv-timer');
-    const pvCount = presenter.querySelector('#pv-count');
+    /* ========== PRESENTER MODE (new window) ========== */
+    let presenterWin = null;
 
-    let timerStart = 0, timerHandle = null;
-    function fmtTime(ms){
-      const s = Math.floor(ms/1000);
-      const mm = String(Math.floor(s/60)).padStart(2,'0');
-      const ss = String(s%60).padStart(2,'0');
-      return mm + ':' + ss;
-    }
-    function startTimer(){
-      if (timerHandle) return;
-      timerStart = Date.now();
-      timerHandle = setInterval(() => {
-        pvTimer.textContent = fmtTime(Date.now() - timerStart);
-      }, 1000);
-    }
-    function stopTimer(){ if (timerHandle) { clearInterval(timerHandle); timerHandle = null; } }
-    function resetTimer(){ timerStart = Date.now(); pvTimer.textContent = '00:00'; }
-
-    function renderPresenter(n){
-      if (!presenter.classList.contains('open')) return;
-      // Clone current + next slides for mini display
-      pvStage.innerHTML = '';
-      pvNext.innerHTML = '';
-      const curClone = slides[n].cloneNode(true);
-      curClone.style.position = 'relative';
-      curClone.style.opacity = '1';
-      curClone.style.transform = 'none';
-      curClone.classList.add('is-active');
-      pvStage.appendChild(curClone);
-
-      if (n + 1 < total) {
-        const nxtClone = slides[n+1].cloneNode(true);
-        nxtClone.style.position = 'relative';
-        nxtClone.style.opacity = '1';
-        nxtClone.style.transform = 'none';
-        nxtClone.classList.add('is-active');
-        pvNext.appendChild(nxtClone);
-      } else {
-        pvNext.innerHTML = '<div class="pv-end">— END —</div>';
+    function openPresenterWindow() {
+      if (presenterWin && !presenterWin.closed) {
+        presenterWin.focus();
+        return;
       }
 
-      // Notes
-      const note = slides[n].querySelector('.notes, aside.notes, .speaker-notes');
-      pvBody.innerHTML = note ? note.innerHTML : '<span class="pv-empty">（这一页还没有逐字稿）</span>';
-      pvCount.textContent = (n+1) + ' / ' + total;
+      // Collect all slides' HTML and notes
+      const slideData = slides.map((s, i) => {
+        const note = s.querySelector('.notes, aside.notes, .speaker-notes');
+        return {
+          html: s.outerHTML,
+          notes: note ? note.innerHTML : '',
+          title: s.getAttribute('data-title') ||
+            (s.querySelector('h1,h2,h3')||{}).textContent || ('Slide '+(i+1))
+        };
+      });
+
+      // Collect all stylesheets from current document
+      const styleSheets = Array.from(document.querySelectorAll('link[rel="stylesheet"], style')).map(el => {
+        if (el.tagName === 'LINK') return '<link rel="stylesheet" href="' + el.href + '">';
+        return '<style>' + el.textContent + '</style>';
+      }).join('\n');
+
+      const presenterHTML = buildPresenterHTML(slideData, styleSheets, total, idx);
+
+      presenterWin = window.open('', 'html-ppt-presenter', 'width=1200,height=800,menubar=no,toolbar=no');
+      if (!presenterWin) {
+        alert('请允许弹出窗口以使用演讲者视图');
+        return;
+      }
+      presenterWin.document.open();
+      presenterWin.document.write(presenterHTML);
+      presenterWin.document.close();
     }
 
-    function togglePresenter(force){
-      const willOpen = force !== undefined ? force : !presenter.classList.contains('open');
-      presenter.classList.toggle('open', willOpen);
-      document.body.classList.toggle('presenter-mode', willOpen);
-      if (willOpen) {
-        startTimer();
-        renderPresenter(idx);
-      } else {
-        stopTimer();
-      }
+    function buildPresenterHTML(slideData, styleSheets, total, startIdx) {
+      // Escape backticks and ${ in slide HTML for template literal safety
+      const slidesJSON = JSON.stringify(slideData);
+
+      return '<!DOCTYPE html>\n'
++ '<html lang="zh-CN">\n<head>\n<meta charset="utf-8">\n'
++ '<title>Presenter View</title>\n'
++ styleSheets + '\n'
++ '<style>\n'
++ '  * { margin: 0; padding: 0; box-sizing: border-box; }\n'
++ '  html, body { width: 100%; height: 100%; overflow: hidden; background: #0d0d0d; color: #e6edf3; font-family: "Noto Sans SC", -apple-system, sans-serif; }\n'
++ '  .pv-grid { display: grid; grid-template-columns: 1.4fr 1fr; grid-template-rows: 1fr auto; height: 100vh; gap: 12px; padding: 12px; }\n'
++ '  .pv-current-wrap { grid-row: 1; grid-column: 1; display: flex; flex-direction: column; min-height: 0; }\n'
++ '  .pv-right { grid-row: 1; grid-column: 2; display: flex; flex-direction: column; gap: 10px; min-height: 0; }\n'
++ '  .pv-bar { grid-row: 2; grid-column: 1 / -1; display: flex; align-items: center; gap: 16px; padding: 8px 16px; background: rgba(255,255,255,.04); border-radius: 8px; font-size: 13px; }\n'
++ '  .pv-label { font-size: 10px; letter-spacing: .18em; text-transform: uppercase; color: #6e7681; font-weight: 700; margin-bottom: 6px; padding-left: 2px; flex-shrink: 0; }\n'
++ '\n'
++ '  /* Slide stage: fixed aspect ratio container with CSS scale */\n'
++ '  .pv-stage { flex: 1; position: relative; border: 1px solid rgba(255,255,255,.08); border-radius: 10px; overflow: hidden; background: var(--bg, #0d1117); min-height: 0; }\n'
++ '  .pv-stage-inner { position: absolute; top: 0; left: 0; width: 1920px; height: 1080px; transform-origin: top left; pointer-events: none; }\n'
++ '  .pv-stage-inner .slide { position: absolute; inset: 0; opacity: 1 !important; transform: none !important; display: block !important; }\n'
++ '  .pv-stage-inner .slide .notes, .pv-stage-inner .slide aside.notes, .pv-stage-inner .slide .speaker-notes { display: none !important; }\n'
++ '\n'
++ '  .pv-next-wrap { flex: 0 0 35%; display: flex; flex-direction: column; min-height: 0; }\n'
++ '  .pv-next-stage { opacity: .8; }\n'
++ '  .pv-next-end { display: flex; align-items: center; justify-content: center; height: 100%; font-size: 16px; color: #484f58; letter-spacing: .1em; }\n'
++ '\n'
++ '  /* Notes panel */\n'
++ '  .pv-notes { flex: 1; display: flex; flex-direction: column; min-height: 0; background: rgba(255,255,255,.02); border: 1px solid rgba(255,255,255,.06); border-radius: 10px; padding: 12px 16px; }\n'
++ '  .pv-notes-body { flex: 1; overflow-y: auto; font-size: 18px; line-height: 1.75; color: #d0d7de; }\n'
++ '  .pv-notes-body p { margin: 0 0 .7em 0; }\n'
++ '  .pv-notes-body strong { color: #f0883e; }\n'
++ '  .pv-notes-body em { color: #58a6ff; font-style: normal; }\n'
++ '  .pv-notes-body code { font-family: monospace; font-size: .9em; background: rgba(255,255,255,.08); padding: 1px 6px; border-radius: 4px; }\n'
++ '  .pv-empty { color: #484f58; font-style: italic; }\n'
++ '\n'
++ '  .pv-timer { font-family: "SF Mono","JetBrains Mono",monospace; font-size: 26px; font-weight: 700; color: #3fb950; letter-spacing: .04em; }\n'
++ '  .pv-count { font-weight: 600; color: #e6edf3; font-size: 15px; }\n'
++ '  .pv-title { color: #8b949e; font-size: 13px; flex: 1; text-align: right; overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }\n'
++ '  .pv-hint { font-size: 11px; color: #484f58; margin-left: auto; }\n'
++ '</style>\n'
++ '</head>\n<body>\n'
++ '<div class="pv-grid">\n'
++ '  <div class="pv-current-wrap">\n'
++ '    <div class="pv-label">CURRENT</div>\n'
++ '    <div class="pv-stage" id="pv-current"><div class="pv-stage-inner" id="pv-cur-inner"></div></div>\n'
++ '  </div>\n'
++ '  <div class="pv-right">\n'
++ '    <div class="pv-next-wrap">\n'
++ '      <div class="pv-label">NEXT</div>\n'
++ '      <div class="pv-stage pv-next-stage" id="pv-next"><div class="pv-stage-inner" id="pv-nxt-inner"></div></div>\n'
++ '    </div>\n'
++ '    <div class="pv-notes">\n'
++ '      <div class="pv-label">SPEAKER SCRIPT · 逐字稿</div>\n'
++ '      <div class="pv-notes-body" id="pv-notes"></div>\n'
++ '    </div>\n'
++ '  </div>\n'
++ '  <div class="pv-bar">\n'
++ '    <div class="pv-timer" id="pv-timer">00:00</div>\n'
++ '    <div class="pv-count" id="pv-count">1 / ' + total + '</div>\n'
++ '    <div class="pv-title" id="pv-title"></div>\n'
++ '    <div class="pv-hint">← → 翻页 · R 重置计时 · T 主题 · Esc 关闭</div>\n'
++ '  </div>\n'
++ '</div>\n'
++ '<script>\n'
++ '(function(){\n'
++ '  var slideData = ' + slidesJSON + ';\n'
++ '  var total = ' + total + ';\n'
++ '  var idx = ' + startIdx + ';\n'
++ '  var CHANNEL_NAME = ' + JSON.stringify(CHANNEL_NAME) + ';\n'
++ '  var bc; try { bc = new BroadcastChannel(CHANNEL_NAME); } catch(e) {}\n'
++ '\n'
++ '  var curInner = document.getElementById("pv-cur-inner");\n'
++ '  var nxtInner = document.getElementById("pv-nxt-inner");\n'
++ '  var pvNotes = document.getElementById("pv-notes");\n'
++ '  var pvCount = document.getElementById("pv-count");\n'
++ '  var pvTitle = document.getElementById("pv-title");\n'
++ '  var pvTimer = document.getElementById("pv-timer");\n'
++ '\n'
++ '  /* Timer */\n'
++ '  var timerStart = Date.now();\n'
++ '  setInterval(function(){\n'
++ '    var s = Math.floor((Date.now() - timerStart) / 1000);\n'
++ '    pvTimer.textContent = String(Math.floor(s/60)).padStart(2,"0") + ":" + String(s%60).padStart(2,"0");\n'
++ '  }, 1000);\n'
++ '\n'
++ '  /* Compute scale to fit 1920x1080 into actual container size */\n'
++ '  function fitScale(container) {\n'
++ '    var cw = container.clientWidth, ch = container.clientHeight;\n'
++ '    if (!cw || !ch) return 0.3;\n'
++ '    return Math.min(cw / 1920, ch / 1080);\n'
++ '  }\n'
++ '\n'
++ '  function renderSlide(container, html) {\n'
++ '    container.innerHTML = html;\n'
++ '    /* Force the slide visible */\n'
++ '    var sl = container.querySelector(".slide");\n'
++ '    if (sl) {\n'
++ '      sl.style.position = "absolute";\n'
++ '      sl.style.inset = "0";\n'
++ '      sl.style.opacity = "1";\n'
++ '      sl.style.transform = "none";\n'
++ '      sl.style.display = "block";\n'
++ '      sl.classList.add("is-active");\n'
++ '    }\n'
++ '  }\n'
++ '\n'
++ '  function update(n) {\n'
++ '    n = Math.max(0, Math.min(total - 1, n));\n'
++ '    idx = n;\n'
++ '    /* Current slide */\n'
++ '    renderSlide(curInner, slideData[n].html);\n'
++ '    /* Next slide */\n'
++ '    if (n + 1 < total) {\n'
++ '      nxtInner.parentElement.querySelector(".pv-next-end") && nxtInner.parentElement.querySelector(".pv-next-end").remove();\n'
++ '      nxtInner.style.display = "";\n'
++ '      renderSlide(nxtInner, slideData[n + 1].html);\n'
++ '    } else {\n'
++ '      nxtInner.style.display = "none";\n'
++ '      if (!nxtInner.parentElement.querySelector(".pv-next-end")) {\n'
++ '        var end = document.createElement("div");\n'
++ '        end.className = "pv-next-end";\n'
++ '        end.textContent = "— END —";\n'
++ '        nxtInner.parentElement.appendChild(end);\n'
++ '      }\n'
++ '    }\n'
++ '    /* Notes */\n'
++ '    pvNotes.innerHTML = slideData[n].notes || "<span class=\\"pv-empty\\">（这一页还没有逐字稿）</span>";\n'
++ '    pvCount.textContent = (n + 1) + " / " + total;\n'
++ '    pvTitle.textContent = slideData[n].title;\n'
++ '    /* Recompute scale */\n'
++ '    reScale();\n'
++ '  }\n'
++ '\n'
++ '  function reScale() {\n'
++ '    var cs = fitScale(document.getElementById("pv-current"));\n'
++ '    curInner.style.transform = "scale(" + cs + ")";\n'
++ '    var ns = fitScale(document.getElementById("pv-next"));\n'
++ '    nxtInner.style.transform = "scale(" + ns + ")";\n'
++ '  }\n'
++ '\n'
++ '  /* Sync from audience window */\n'
++ '  if (bc) {\n'
++ '    bc.onmessage = function(e) {\n'
++ '      if (e.data && e.data.type === "go") update(e.data.idx);\n'
++ '    };\n'
++ '  }\n'
++ '\n'
++ '  /* Keyboard in presenter window */\n'
++ '  function go(n) {\n'
++ '    update(n);\n'
++ '    if (bc) bc.postMessage({ type: "go", idx: idx });\n'
++ '  }\n'
++ '  document.addEventListener("keydown", function(e) {\n'
++ '    switch(e.key) {\n'
++ '      case "ArrowRight": case " ": case "PageDown": go(idx + 1); e.preventDefault(); break;\n'
++ '      case "ArrowLeft": case "PageUp": go(idx - 1); e.preventDefault(); break;\n'
++ '      case "Home": go(0); break;\n'
++ '      case "End": go(total - 1); break;\n'
++ '      case "r": case "R": timerStart = Date.now(); pvTimer.textContent = "00:00"; break;\n'
++ '      case "Escape": window.close(); break;\n'
++ '    }\n'
++ '  });\n'
++ '\n'
++ '  window.addEventListener("resize", reScale);\n'
++ '  /* Initial render */\n'
++ '  setTimeout(function(){ update(idx); }, 50);\n'
++ '})();\n'
++ '</' + 'script>\n'
++ '</body></html>';
     }
+
     function fullscreen(){ const el=document.documentElement;
       if (!document.fullscreenElement) el.requestFullscreen&&el.requestFullscreen();
       else document.exitFullscreen&&document.exitFullscreen();
@@ -222,7 +371,6 @@
         link.id = 'theme-link';
         document.head.appendChild(link);
       }
-      // resolve relative to runtime's location
       const themePath = (root.getAttribute('data-theme-base') || 'assets/themes/') + name + '.css';
       link.href = themePath;
       root.setAttribute('data-theme', name);
@@ -252,13 +400,12 @@
         case 'Home': go(0); break;
         case 'End': go(total-1); break;
         case 'f': case 'F': fullscreen(); break;
-        case 's': case 'S': togglePresenter(); break;
+        case 's': case 'S': openPresenterWindow(); break;
         case 'n': case 'N': toggleNotes(); break;
-        case 'r': case 'R': if (presenter.classList.contains('open')) resetTimer(); break;
         case 'o': case 'O': toggleOverview(); break;
         case 't': case 'T': cycleTheme(); break;
         case 'a': case 'A': cycleAnim(); break;
-        case 'Escape': toggleOverview(false); toggleNotes(false); togglePresenter(false); break;
+        case 'Escape': toggleOverview(false); toggleNotes(false); break;
       }
     });
 
diff --git a/references/presenter-mode.md b/references/presenter-mode.md
index 1d68a93..f0c8e8f 100644
--- a/references/presenter-mode.md
+++ b/references/presenter-mode.md
@@ -126,31 +126,34 @@ html-ppt 的 **S 键演讲者视图是 `runtime.js` 内置的，所有 full-deck
 
 ## 演讲者视图显示的内容
 
-按 `S` 键后，屏幕分成两部分：
+按 `S` 键后，**弹出一个独立的演讲者窗口**（原页面保持观众视图不变）：
 
 ```
-┌────────────────────────┬──────────────────────┐
-│                        │  NEXT                │
-│    CURRENT             │  [下一页缩略图]      │
-│    [当前页大图]        ├──────────────────────┤
-│                        │  SPEAKER SCRIPT      │
-│                        │  [大字号逐字稿]      │
-│                        │  [可滚动]            │
-│                        ├──────────────────────┤
-│                        │  ⏱ 12:34  3 / 8  💡  │
-└────────────────────────┴──────────────────────┘
+ 观众窗口（原页面）           演讲者窗口（新弹窗）
+┌──────────────────┐    ┌────────────────────────┬──────────────────────┐
+│                  │    │                        │  NEXT                │
+│   正常 slide     │    │    CURRENT             │  [下一页缩放预览]    │
+│   全屏展示       │◄──►│    [当前页缩放预览]    ├──────────────────────┤
+│                  │sync│    1920×1080 → scale() │  SPEAKER SCRIPT      │
+│                  │    │                        │  [大字号逐字稿]      │
+│                  │    │                        │  [可滚动]            │
+│                  │    │                        ├──────────────────────┤
+│                  │    │                        │  ⏱ 12:34  3 / 8  💡  │
+└──────────────────┘    └────────────────────────┴──────────────────────┘
+       ↑ BroadcastChannel 双向同步翻页 ↑
 ```
 
-- **左侧 55%**：当前页实时预览
-- **右上 30%**：下一页预览（帮助过渡）
+- **左侧 58%**：当前页 — 在 1920×1080 设计尺寸下渲染后 CSS scale 缩放，排版与观众端一致
+- **右上 35%**：下一页预览 — 同样 scale 缩放，帮助准备过渡
 - **右中**：逐字稿，字号 18px，高对比度，可滚动
-- **右下**：计时器 + 页码 + 键位提示
+- **右下**：计时器 + 页码 + 当前页标题 + 键位提示
+- **两窗口同步**：在任一窗口按 ← → 翻页，另一个窗口自动同步
 
 ## 键盘快捷键（演讲者模式）
 
 | 键 | 动作 |
 |---|---|
-| `S` | 进入 / 退出演讲者视图 |
+| `S` | 打开演讲者窗口（弹出新窗口，原页面保持观众视图） |
 | `←` `→` / Space / PgDn | 翻页（即使在演讲者视图里） |
 | `T` | 切换主题 |
 | `R` | 重置计时器（仅演讲者视图下） |
@@ -160,12 +163,13 @@ html-ppt 的 **S 键演讲者视图是 `runtime.js` 内置的，所有 full-deck
 
 ## 双屏演讲的标准流程
 
-1. 副屏（你看的屏幕）：打开 HTML，按 `F` 全屏
-2. 主屏（观众看的）：Cmd+Tab 或投屏软件把全屏窗口发到主屏
-3. 副屏上按 `S` → 你看演讲者视图，观众看干净的 slide
-4. 你翻页，主屏同步
+1. 打开 `index.html`，按 `S` → 弹出演讲者窗口
+2. 把**观众窗口**（原页面）拖到投影 / 外接屏，按 `F` 全屏
+3. 把**演讲者窗口**（弹窗）留在你面前的屏幕
+4. 在任一窗口按 ← → 翻页，两边自动同步
+5. 演讲者窗口里看逐字稿 + 下一页 + 计时器
 
-> 💡 html-ppt 目前不支持"真正的 dual-screen 独立窗口"——演讲者视图和主视图在同一个 HTML 里切换。如果需要双屏独立显示，推荐用 reveal.js 的原生 speaker view（`/speaker.html`）。
+> 💡 html-ppt 的演讲者模式会**弹出一个独立的新窗口**。原页面保持观众视图不变，只受翻页控制。两个窗口通过 BroadcastChannel 双向同步。演讲者窗口中的当前页/下一页预览使用 CSS `transform: scale()` 在 1920×1080 设计分辨率下缩放渲染，保证排版与观众端完全一致。
 
 ## 常见错误
 
diff --git a/templates/full-decks/presenter-mode-reveal/README.md b/templates/full-decks/presenter-mode-reveal/README.md
index dadffa5..08a6414 100644
--- a/templates/full-decks/presenter-mode-reveal/README.md
+++ b/templates/full-decks/presenter-mode-reveal/README.md
@@ -20,7 +20,7 @@ open examples/my-talk/index.html
 
 | 键 | 动作 |
 |---|---|
-| `S` | 进入 / 退出演讲者视图 |
+| `S` | 打开演讲者窗口（弹出新窗口，原页面不动） |
 | `T` | 切换主题（5 种预设） |
 | `←` `→` | 翻页 |
 | `Space` / `PgDn` | 下一页 |
@@ -82,4 +82,4 @@ presenter-mode-reveal/
 
 - **观众永远看不到 `.notes` 内容** — CSS 默认 `display:none`，只在演讲者视图里可见
 - **别把只给自己看的话写在 slide 本体上** — 所有提词必须在 `<aside class="notes">` 里
-- **双屏演讲**：把 `index.html` 用 `file://` 打开，主屏全屏、副屏按 S 进演讲者视图
+- **双屏演讲**：打开 `index.html` 按 S 弹出演讲者窗口，把观众窗口拖到投影/外接屏 F 全屏，演讲者窗口留在自己屏幕