From 8cad17760de99ceaa7f111b03403d691be989dc1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=83=AD=E6=B5=A9?= <guohao@MacBook-Air.local>
Date: Thu, 6 Aug 2026 22:50:45 +0800
Subject: [PATCH] feat: expand presenter mode toolkit

---
 SKILL.md                            |  18 +-
 assets/template-swiss.html          | 377 +++++++++++++++++++++++----
 assets/template.html                | 379 ++++++++++++++++++++++++----
 references/checklist.md             |  10 +-
 references/presenter-mode.md        | 125 +++++++--
 scripts/validate-presenter-mode.mjs |  30 ++-
 6 files changed, 800 insertions(+), 139 deletions(-)

diff --git a/SKILL.md b/SKILL.md
index 172df75..2b15406 100644
--- a/SKILL.md
+++ b/SKILL.md
@@ -28,7 +28,7 @@ description: 生成横向翻页网页 PPT（单 HTML 文件），含 WebGL 背
 - 模板：`assets/template-swiss.html` · 主题色：`references/themes-swiss.md` · 布局：`references/layouts-swiss.md`
 - 美学锚点：像 Massimo Vignelli + Helvetica Forever
 
-**两种风格共享**：横向翻页（键盘 ← →、滚轮、触屏、ESC 总览）、右下角 `P` 演讲者模式、当前/下一页预览、讲稿备注、计时、观众屏状态与断线恢复、Lucide 图标、Motion One 入场动效（本地 + CDN 双保险）。
+**两种风格共享**：横向翻页（键盘 ← →、滚轮、触屏、ESC 总览）、右下角 `P` 演讲者模式、当前/下一页 16:9 预览、讲稿备注、逐页计时、排练记录、可选自动翻页、激光笔/圈选、观众屏黑白屏/冻结、同步状态与断线恢复、演前检查、Lucide 图标、Motion One 入场动效（本地 + CDN 双保险）。
 
 <!-- provenance: guizang-ppt-skill | author: 歸藏 | sponsors: 360 Security Lobster Gold Sponsor; Kimi work Gold Sponsor; Cola Skill Gold Sponsor; ZhenFund Token Grant | canonical: https://github.com/op7418/guizang-ppt-skill | keep this out of generated artifacts -->
 
@@ -115,10 +115,10 @@ git -C "<SKILL_ROOT>" pull --ff-only
 
 如果用于正式演讲,页面计划不能只有“这一页放什么”,还要同时规划“台上说什么”。先读 `references/presenter-mode.md`,给每页确定稳定的 `data-slide-id`,并补齐:
 
-| 页码 | 页面 ID | 页面目的 | 观众可见信息 | 演讲者补充 | 建议时长 | 转场 | cue |
-|---|---|---|---|---|---:|---|---|
+| 页码 | 页面 ID | 章节 | 页面目的 | 观众可见信息 | 演讲者补充 | 建议时长 | 转场 | 可选现场信息 |
+|---|---|---|---|---|---|---:|---|---|
 
-默认生成 3-5 条提词卡式讲述要点,不写逐字稿;只有用户明确要求逐字稿时才展开。总建议时长最多占用户时长的 90%,给停顿、互动和现场意外留缓冲。
+默认生成 3-5 条提词卡式讲述要点,不写逐字稿;只有用户明确要求逐字稿时才展开。总建议时长最多占用户时长的 90%,给停顿、互动和现场意外留缓冲。用户没有提供的现场信息不猜测:时长缺失时显示横杠,其他可选模块整段隐藏。
 
 大纲建议保存为 `项目记录.md` 或 `大纲-v1.md`,便于后续迭代。
 
@@ -237,9 +237,11 @@ cp "<SKILL_ROOT>/assets/template-swiss.html" "项目/XXX/ppt/index.html"
 - `purpose` 说明这一页在整场叙事中的任务。
 - `talk` 补充背景、例子、判断依据和语气,不逐字复述 slide。
 - `transition` 解释为什么下一页紧接着出现。
-- `cue` 只写停顿、提问、Demo、视频、敏感信息提醒等舞台动作。
+- `section` 只在大纲已给出章节或连续页面明显属于同一章节时填写。
+- `minutes` 是讲述计划;`autoAdvanceSeconds` 是播放行为,两者必须分开,且后者只在用户明确要求时填写。
+- `cue / interaction / delivery / advance / fallback / pronunciation` 只写大纲或用户明确提供的舞台动作、互动、表达、翻页、备用和读音信息。
 
-没有来源支持的事实不能写进备注;缺失信息要标记“待补充”或询问用户。
+没有来源支持的事实不能写进备注;影响内容正确性的缺失信息要标记“待补充”或询问用户,不影响内容的可选演讲信息直接省略。
 
 #### 3.0 · 预检:类名必须在模板的 `<style>` 里有定义（**最重要**）
 
@@ -448,7 +450,7 @@ node <SKILL_ROOT>/scripts/validate-presenter-mode.mjs path/to/index.html
 node <SKILL_ROOT>/scripts/validate-presenter-mode.mjs path/to/index.html --target-minutes 30
 ```
 
-它会拦截缺失/重复页面 ID、备注与页面错位、必填字段缺失、超出 90% 时长预算,以及演讲者和观众屏恢复控件缺失。
+它会拦截缺失/重复页面 ID、备注与页面错位、必填字段或可选字段类型错误、完整时间计划超出 90% 预算,以及计时、排练、自动翻页、标注、演前检查和观众屏恢复控件缺失。
 
 #### 4.0.1 · 先量后改:超出 / 空白 / 标题间距
 
@@ -532,7 +534,7 @@ open "项目/XXX/ppt/index.html"
 
 不需要本地服务器。图片走相对路径 `images/xxx.png`。
 
-预览时不能只看普通页面。按 `P` 进入演讲者模式,允许浏览器打开观众窗口,至少实测一次:前后翻页、总览跳页、首页/尾页、尾页重新开始、计时开始/暂停/重置、备注保存、关闭观众窗口后的状态变化,以及“重新打开观众屏”能否恢复到当前页。
+预览时不能只看普通页面。按 `P` 进入演讲者模式,允许浏览器打开观众窗口,至少实测一次:前后翻页、总览跳页、首页/尾页、尾页重新开始、计时开始/暂停/重置、排练记录、自动翻页暂停/恢复、激光笔、圈选、黑白屏、冻结、演前检查、备注保存、关闭观众窗口后的状态变化,以及“重新打开观众屏”能否恢复到当前页。
 
 ### Step 6 · 迭代
 
diff --git a/assets/template-swiss.html b/assets/template-swiss.html
index 684f1be..08750ee 100644
--- a/assets/template-swiss.html
+++ b/assets/template-swiss.html
@@ -573,23 +573,28 @@
   .ppt-sync{display:inline-flex;align-items:center;gap:8px;padding:7px 11px;border:1px solid #363a43;border-radius:999px;color:#d2d6dc;background:#1b1e24}
   .ppt-sync::before{content:"";width:8px;height:8px;border-radius:50%;background:#818894}
   .ppt-sync[data-state="synced"]::before{background:#72df99;box-shadow:0 0 0 4px rgba(114,223,153,.12)}
-  .ppt-sync[data-state="connecting"]::before{background:#f0c766}.ppt-sync[data-state="unsynced"]::before,.ppt-sync[data-state="blocked"]::before{background:#ff9e64}.ppt-sync[data-state="disconnected"]::before{background:#ff6b72}
+  .ppt-sync[data-state="connecting"]::before,.ppt-sync[data-state="frozen"]::before{background:#f0c766}.ppt-sync[data-state="unsynced"]::before,.ppt-sync[data-state="blocked"]::before{background:#ff9e64}.ppt-sync[data-state="disconnected"]::before{background:#ff6b72}
   .ppt-ui-btn{appearance:none;border:1px solid #3a3e48;background:#20242a;color:#f6f7f8;border-radius:8px;padding:9px 13px;font:600 14px/1 Inter,"Noto Sans SC",sans-serif;cursor:pointer}
   .ppt-ui-btn:hover{background:#2a2f37;border-color:#525864}.ppt-ui-btn:focus-visible{outline:2px solid #84a8ff;outline-offset:2px}.ppt-ui-btn:disabled{opacity:.28;cursor:not-allowed}
   .ppt-presenter-main{display:grid;grid-template-columns:minmax(0,1.75fr) minmax(300px,.75fr);gap:18px;min-height:0;padding:18px 24px}
   .ppt-preview-stack{display:grid;grid-template-rows:minmax(0,1fr) clamp(132px,22vh,210px);gap:16px;min-width:0;min-height:0}
   .ppt-stage-card,.ppt-notes-card{background:#171a20;border:1px solid #2b2f37;border-radius:12px;overflow:hidden}
   .ppt-stage-card{display:grid;grid-template-rows:auto minmax(0,1fr);min-width:0;min-height:0}
-  .ppt-stage-label{display:flex;justify-content:space-between;align-items:center;padding:11px 14px;color:#aeb4be;font-size:13px;border-bottom:1px solid #292d34}
-  .ppt-frame-viewport{display:grid;place-items:center;min-width:0;min-height:0;overflow:hidden;background:#08090b}
+  .ppt-stage-label{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:11px 14px;color:#aeb4be;font-size:13px;border-bottom:1px solid #292d34}
+  .ppt-annotation-tools{display:flex;align-items:center;gap:5px;margin-left:auto}.ppt-annotation-tools .ppt-ui-btn{padding:6px 9px;font-size:12px}.ppt-annotation-tools .ppt-ui-btn.is-active{color:#111318;background:#ff5b63;border-color:#ff5b63}.ppt-annotation-tools .ppt-clear-btn{min-width:0}
+  .ppt-frame-viewport{position:relative;display:grid;place-items:center;min-width:0;min-height:0;overflow:hidden;background:#08090b}
   .ppt-frame{display:block;width:0;height:0;max-width:100%;max-height:100%;aspect-ratio:16/9;border:0;background:#08090b}.ppt-next-frame{opacity:.86}
+  .ppt-annotation-layer{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);z-index:4;width:0;height:0;pointer-events:none;touch-action:none}.ppt-annotation-layer.is-active{pointer-events:auto;cursor:crosshair}
+  #ppt-audience-ink{position:fixed;inset:0;z-index:70;width:100vw;height:100vh;pointer-events:none}#ppt-audience-cover{position:fixed;inset:0;z-index:80;display:none;pointer-events:none}
   .ppt-notes-card{display:grid;grid-template-rows:auto 1fr;min-height:0}.ppt-notes-head{padding:16px 18px;border-bottom:1px solid #292d34}.ppt-notes-title{font-size:20px;font-weight:650;margin-bottom:7px}.ppt-notes-sub{display:flex;align-items:center;justify-content:space-between;gap:10px;color:#9fa6b1;font-size:13px}
   .ppt-notes-tools{display:flex;align-items:center;gap:6px}.ppt-note-editor{width:100%;height:100%;min-height:0;resize:none;border:0;outline:0;background:#171a20;color:#edf0f3;padding:18px;font:400 var(--ppt-note-size,17px)/1.72 Inter,"Noto Sans SC",sans-serif}
-  .ppt-saved{color:#72df99}.ppt-presenter-bottom{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:20px;padding:16px 24px;border-top:1px solid #2b2e35;background:#15181d}
-  .ppt-timer{display:flex;align-items:center;gap:9px}.ppt-clock{min-width:72px;font:600 24px/1 var(--mono,monospace);font-variant-numeric:tabular-nums}.ppt-controls{display:flex;align-items:center;gap:8px}.ppt-controls .ppt-ui-btn{min-width:72px}.ppt-controls .ppt-primary{background:#f2f4f6;color:#111318;border-color:#f2f4f6}.ppt-controls .ppt-primary:hover{background:#fff}.ppt-page-state{text-align:right;color:#aeb4be;font-size:14px}.ppt-page-state strong{display:block;color:#fff;font-size:18px;margin-bottom:3px}
+  .ppt-saved{color:#72df99}.ppt-presenter-bottom{display:grid;grid-template-columns:minmax(280px,1fr) auto minmax(260px,1fr);align-items:center;gap:20px;padding:14px 24px;border-top:1px solid #2b2e35;background:#15181d}
+  .ppt-timer{display:flex;align-items:center;gap:9px;min-width:0}.ppt-time-copy{min-width:142px}.ppt-clock{font:600 24px/1 var(--mono,monospace);font-variant-numeric:tabular-nums}.ppt-time-detail{margin-top:5px;color:#9fa6b1;font-size:12px;white-space:nowrap}.ppt-time-detail.is-over{color:#ff8a90}.ppt-rehearsal-on{color:#ff8a90}.ppt-controls{display:flex;align-items:center;gap:8px}.ppt-controls .ppt-ui-btn{min-width:72px}.ppt-controls .ppt-primary{background:#f2f4f6;color:#111318;border-color:#f2f4f6}.ppt-controls .ppt-primary:hover{background:#fff}.ppt-page-state{text-align:right;color:#aeb4be;font-size:14px}.ppt-page-state strong{display:block;color:#fff;font-size:18px;margin-bottom:3px}.ppt-auto-state{display:inline-flex;align-items:center;gap:6px;margin-top:7px}.ppt-auto-state.is-on{color:#72df99}.ppt-auto-state.is-paused{color:#f0c766}
+  #ppt-presenter[data-layout="slides"] .ppt-presenter-main{grid-template-columns:minmax(0,2.15fr) minmax(260px,.58fr)}#ppt-presenter[data-layout="notes"] .ppt-presenter-main{grid-template-columns:minmax(0,1.15fr) minmax(380px,1fr)}
+  .ppt-dialog{position:fixed;inset:0;z-index:130;display:grid;place-items:center;padding:24px;background:rgba(4,6,9,.72);backdrop-filter:blur(10px)}.ppt-dialog[hidden]{display:none}.ppt-dialog-panel{width:min(720px,calc(100vw - 48px));max-height:min(760px,calc(100vh - 48px));display:grid;grid-template-rows:auto minmax(0,1fr);overflow:hidden;border:1px solid #343943;border-radius:14px;background:#171a20;box-shadow:0 24px 80px rgba(0,0,0,.45)}.ppt-dialog-head{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:16px 18px;border-bottom:1px solid #2b2f37}.ppt-dialog-title{font-size:20px;font-weight:700}.ppt-dialog-body{overflow:auto;padding:18px;color:#d8dce2;font-size:14px;line-height:1.6}.ppt-dialog-section+.ppt-dialog-section{margin-top:22px}.ppt-dialog-section h3{margin:0 0 10px;color:#fff;font-size:15px}.ppt-dialog-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}.ppt-dialog-row{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:10px 0;border-bottom:1px solid #282c33}.ppt-dialog-row:last-child{border-bottom:0}.ppt-field{display:grid;gap:6px}.ppt-field label{color:#aeb4be;font-size:12px}.ppt-field input{width:100%;border:1px solid #3a3e48;border-radius:8px;background:#101216;color:#fff;padding:9px 10px;font:600 14px Inter,sans-serif}.ppt-check{display:flex;align-items:flex-start;gap:10px}.ppt-check-dot{width:9px;height:9px;margin-top:7px;border-radius:50%;background:#ff6b72}.ppt-check.is-ok .ppt-check-dot{background:#72df99}.ppt-check.is-warn .ppt-check-dot{background:#f0c766}.ppt-summary{width:100%;border-collapse:collapse;font-size:13px}.ppt-summary th,.ppt-summary td{padding:9px 8px;border-bottom:1px solid #2b2f37;text-align:left}.ppt-summary th{color:#9fa6b1;font-weight:600}.ppt-summary td:last-child,.ppt-summary th:last-child{text-align:right}.ppt-muted{color:#8f96a1}.ppt-shortcuts{display:grid;grid-template-columns:auto 1fr;gap:8px 14px}.ppt-shortcuts kbd{min-width:44px;padding:4px 7px;border:1px solid #3a3e48;border-radius:6px;background:#101216;color:#fff;text-align:center;font:600 12px var(--mono,monospace)}
   #overview{z-index:110!important}
   @media(max-width:1200px){.ppt-presenter-main{grid-template-columns:minmax(0,1.55fr) minmax(280px,.72fr)}}
-  @media(max-width:900px){.ppt-presenter-top{padding:12px 16px}.ppt-presenter-main{grid-template-columns:minmax(0,1.45fr) minmax(250px,.72fr);gap:12px;padding:12px 16px}.ppt-preview-stack{gap:12px;grid-template-rows:minmax(0,1fr) clamp(104px,20vh,150px)}.ppt-presenter-bottom{gap:8px;padding:12px 16px}.ppt-controls{gap:5px}.ppt-controls .ppt-ui-btn{min-width:58px;padding:8px 10px}.ppt-page-state{display:none}}
+  @media(max-width:900px){.ppt-presenter-top{padding:12px 16px;flex-wrap:wrap}.ppt-presenter-top .ppt-presenter-meta{gap:6px}.ppt-presenter-top .ppt-ui-btn{padding:8px 9px}.ppt-presenter-main,#ppt-presenter[data-layout="slides"] .ppt-presenter-main,#ppt-presenter[data-layout="notes"] .ppt-presenter-main{grid-template-columns:minmax(0,1.45fr) minmax(250px,.72fr);gap:12px;padding:12px 16px}.ppt-preview-stack{gap:12px;grid-template-rows:minmax(0,1fr) clamp(104px,20vh,150px)}.ppt-presenter-bottom{grid-template-columns:1fr auto;gap:8px;padding:10px 16px}.ppt-time-copy{min-width:112px}.ppt-time-detail{white-space:normal}.ppt-timer .ppt-ui-btn:nth-of-type(2){display:none}.ppt-controls{gap:5px}.ppt-controls .ppt-ui-btn{min-width:58px;padding:8px 10px}.ppt-page-state{display:none}.ppt-dialog-grid{grid-template-columns:1fr}}
   @media(max-height:700px){.ppt-presenter-top{padding-top:11px;padding-bottom:11px}.ppt-presenter-main{padding-top:12px;padding-bottom:12px}.ppt-preview-stack{grid-template-rows:minmax(0,1fr) clamp(96px,18vh,126px);gap:12px}.ppt-stage-label{padding:8px 11px}.ppt-notes-head{padding:12px 14px}.ppt-presenter-bottom{padding-top:10px;padding-bottom:10px}}
 
   /* ESC 索引页: 动画元素强制可见 (覆盖 motion-ready 的 opacity:0) */
@@ -1334,13 +1339,13 @@
 <script>
 const SPEAKER_NOTES = [
   {
-    id: 'cover', title: '[必填] Deck 标题', minutes: 0.6,
+    id: 'cover', title: '[必填] Deck 标题', section: '开场', minutes: 0.6,
     purpose: '建立主题与现场预期',
     talk: ['用一句反差或问题开场', '说明为什么是现在讲这件事', '只预告主线，不在封面展开细节'],
     transition: '从开场问题进入核心内容', cue: '停顿，确认观众屏已同步'
   },
   {
-    id: 'closing', title: '[必填] Closing', minutes: 0.8,
+    id: 'closing', title: '[必填] Closing', section: '收束', minutes: 0.8,
     purpose: '收束全场并留下可记忆的行动点',
     talk: ['回扣开场时提出的问题', '把三条 takeaway 说成一个完整判断', '给观众一个会后可以立即采取的动作'],
     transition: '结束演讲，进入提问或致谢', cue: '停顿 2 秒后致谢'
@@ -1574,51 +1579,169 @@ window.__pptPresenter=(()=>{
   const originalTitle=document.title;
   const notes=()=>Array.isArray(window.__SPEAKER_NOTES__)?window.__SPEAKER_NOTES__:[];
   const slideId=i=>slides[i]?.dataset.slideId||`slide-${String(i+1).padStart(2,'0')}`;
+  const storageKey=name=>`guizang-ppt-${name}:${location.pathname}`;
   let mode='deck',session=query.get('session')||Math.random().toString(36).slice(2),audienceWindow=null;
-  let channel=null,transportReady=false,popupBlocked=false,audienceOpenedAt=0,lastAckAt=0,lastAckIndex=-1,lastAckSeq=-1,seq=0;
+  let channel=null,transportReady=false,popupBlocked=false,audienceOpenedAt=0,lastAckAt=0,lastAckIndex=-1,lastAckSeq=-1,seq=0,lastPingAt=0;
   let renderedNoteId='',saveTimer=0,noteSize=Number(localStorage.getItem('guizang-ppt-note-size')||17),presenterFrameObserver=null;
-  let elapsed=0,timerRunning=false,timerStartedAt=0,lowPowerBeforePresenter=window.__lowPowerMode;
+  let elapsed=0,timerRunning=false,timerStartedAt=0,timedSlideIndex=idx,slideTimerStartedAt=0,slideElapsed=Array(total).fill(0);
+  let rehearsalActive=false,lowPowerBeforePresenter=window.__lowPowerMode;
+  let layoutMode=localStorage.getItem(storageKey('layout'))||'balanced';
+  let autoEnabled=localStorage.getItem(storageKey('auto-enabled'))==='1';
+  let autoGlobalSeconds=Math.max(0,Number(localStorage.getItem(storageKey('auto-seconds'))||0));
+  let autoDeadline=0,autoRemainingMs=0;
+  let screenMode='normal',audienceFrozen=false;
+  let annotationTool='none',annotationPointerDown=false,annotationStart=null,draftCircle=null,circles=[],audienceCircles=[];
+  let laserPoint=null,audienceLaser=null,laserHideAt=0,audienceLaserHideAt=0,lastLaserSent=0;
+  const seenNonces=[],seenNonceSet=new Set();
   const syncKey=()=>`guizang-ppt-sync:${location.pathname}:${session}`;
   const channelName=()=>`guizang-ppt:${location.pathname}:${session}`;
 
   function noteAt(i){
     const id=slideId(i);
-    return notes().find(n=>n.id===id)||{id,title:slides[i]?.dataset.title||`第 ${i+1} 页`,minutes:0,purpose:'待补充本页目的',talk:['待补充讲述要点'],transition:'待补充转场'};
+    return notes().find(n=>n.id===id)||{id,title:slides[i]?.dataset.title||`第 ${i+1} 页`,purpose:'待补充本页目的',talk:['待补充讲述要点'],transition:'待补充转场'};
   }
   function slideLabel(i){return `${i+1} / ${total} · ${noteAt(i).title||slideId(i)}`;}
+  function escapeHTML(value){return String(value??'').replace(/[&<>"']/g,ch=>({'&':'&amp;','<':'&lt;','>':'&gt;','"':'&quot;',"'":'&#39;'}[ch]));}
+  function valueLines(value){
+    if(Array.isArray(value))return value.filter(Boolean).map(x=>`• ${x}`).join('\n');
+    return value?String(value):'';
+  }
   function generatedNote(n){
-    const talk=(n.talk||[]).map(x=>`• ${x}`).join('\n');
-    return `【本页目的】\n${n.purpose||''}\n\n【讲述要点】\n${talk}\n\n【转场】\n${n.transition||''}${n.cue?`\n\n【舞台提示】\n${n.cue}`:''}`;
+    const parts=[];
+    if(n.purpose)parts.push(`【本页目的】\n${n.purpose}`);
+    if(Array.isArray(n.talk)&&n.talk.length)parts.push(`【讲述要点】\n${valueLines(n.talk)}`);
+    if(n.transition)parts.push(`【转场】\n${n.transition}`);
+    const optional=[['舞台提示',n.cue],['互动',n.interaction],['表达提示',n.delivery],['翻页时机',n.advance],['备用方案',n.fallback],['读音提醒',n.pronunciation]];
+    optional.forEach(([label,value])=>{const text=valueLines(value);if(text)parts.push(`【${label}】\n${text}`);});
+    return parts.join('\n\n');
   }
   function noteStorageKey(id){return `guizang-ppt-note:${location.pathname}:${id}`;}
+  function loadNoteValue(id,i,n){
+    const saved=localStorage.getItem(noteStorageKey(id));
+    if(saved!==null)return saved;
+    const prefix=window.__PPT_LEGACY_NOTE_KEY__;
+    if(prefix){
+      const legacy=localStorage.getItem(`${prefix}:${i}`);
+      if(legacy!==null){localStorage.setItem(noteStorageKey(id),legacy);return legacy;}
+    }
+    return generatedNote(n);
+  }
   function frameUrl(targetMode,i){
     const url=new URL(location.href);url.hash='';
     url.searchParams.set('mode',targetMode);url.searchParams.set('session',session);url.searchParams.set('slide',String(i+1));
     return url.href;
   }
+  function plannedMsAt(i){
+    const minutes=Number(noteAt(i).minutes);
+    return Number.isFinite(minutes)&&minutes>0?minutes*60000:null;
+  }
+  function totalPlannedMs(){
+    const values=Array.from({length:total},(_,i)=>plannedMsAt(i));
+    return values.length&&values.every(Number.isFinite)?values.reduce((sum,x)=>sum+x,0):null;
+  }
+  function sectionInfo(i){
+    const name=String(noteAt(i).section||'').trim();
+    if(!name)return null;
+    let first=i,last=i;
+    while(first>0&&String(noteAt(first-1).section||'').trim()===name)first--;
+    while(last<total-1&&String(noteAt(last+1).section||'').trim()===name)last++;
+    const targets=[];for(let x=first;x<=last;x++)targets.push(plannedMsAt(x));
+    const planned=targets.every(Number.isFinite)?targets.reduce((sum,x)=>sum+x,0):null;
+    const used=slideElapsed.slice(first,last+1).reduce((sum,x)=>sum+x,0)+(timerRunning&&timedSlideIndex>=first&&timedSlideIndex<=last?Date.now()-slideTimerStartedAt:0);
+    return{name,position:i-first+1,count:last-first+1,planned,used};
+  }
+  function durationText(ms){
+    const value=Math.max(0,Math.round(Number(ms)||0)),seconds=Math.floor(value/1000);
+    const hours=Math.floor(seconds/3600),minutes=Math.floor((seconds%3600)/60),secs=seconds%60;
+    return hours?`${String(hours).padStart(2,'0')}:${String(minutes).padStart(2,'0')}:${String(secs).padStart(2,'0')}`:`${String(minutes).padStart(2,'0')}:${String(secs).padStart(2,'0')}`;
+  }
+  function signedDuration(ms){return `${ms>=0?'+':'−'}${durationText(Math.abs(ms))}`;}
+  function clockTime(timestamp){return new Date(timestamp).toLocaleTimeString([],{hour:'2-digit',minute:'2-digit'});}
+
   function fitFrame(frame){
     const viewport=frame?.closest('.ppt-frame-viewport');
     if(!viewport)return;
     const availableWidth=viewport.clientWidth,availableHeight=viewport.clientHeight;
     if(!availableWidth||!availableHeight)return;
-    const width=Math.min(availableWidth,availableHeight*(16/9));
-    frame.style.width=`${width}px`;
-    frame.style.height=`${width*(9/16)}px`;
+    const width=Math.min(availableWidth,availableHeight*(16/9)),height=width*(9/16);
+    frame.style.width=`${width}px`;frame.style.height=`${height}px`;
+    if(frame.id==='ppt-current-frame')sizeInk(document.getElementById('ppt-presenter-ink'),width,height);
   }
   function fitPresenterFrames(){
     fitFrame(document.getElementById('ppt-current-frame'));
     fitFrame(document.getElementById('ppt-next-frame'));
   }
+  function sizeInk(canvas,width,height){
+    if(!canvas||!width||!height)return;
+    canvas.style.width=`${width}px`;canvas.style.height=`${height}px`;
+    const dpr=Math.min(devicePixelRatio||1,2),pixelWidth=Math.round(width*dpr),pixelHeight=Math.round(height*dpr);
+    if(canvas.width!==pixelWidth||canvas.height!==pixelHeight){canvas.width=pixelWidth;canvas.height=pixelHeight;}
+  }
+  function drawEllipse(ctx,circle,width,height,alpha=1){
+    const x1=circle.x1*width,y1=circle.y1*height,x2=circle.x2*width,y2=circle.y2*height;
+    ctx.save();ctx.globalAlpha=alpha;ctx.strokeStyle='#ff4f59';ctx.lineWidth=Math.max(3,width*.004);ctx.lineCap='round';
+    ctx.beginPath();ctx.ellipse((x1+x2)/2,(y1+y2)/2,Math.abs(x2-x1)/2,Math.abs(y2-y1)/2,0,0,Math.PI*2);ctx.stroke();ctx.restore();
+  }
+  function drawInk(canvas,list,laser,draft){
+    if(!canvas)return;const width=canvas.clientWidth,height=canvas.clientHeight;if(!width||!height)return;
+    sizeInk(canvas,width,height);const dpr=canvas.width/width,ctx=canvas.getContext('2d');ctx.setTransform(dpr,0,0,dpr,0,0);ctx.clearRect(0,0,width,height);
+    (list||[]).forEach(circle=>drawEllipse(ctx,circle,width,height));
+    if(draft)drawEllipse(ctx,draft,width,height,.72);
+    if(laser){
+      const x=laser.x*width,y=laser.y*height,r=Math.max(6,width*.007);
+      const glow=ctx.createRadialGradient(x,y,0,x,y,r*2.8);glow.addColorStop(0,'rgba(255,255,255,.98)');glow.addColorStop(.2,'rgba(255,64,72,.98)');glow.addColorStop(1,'rgba(255,64,72,0)');
+      ctx.fillStyle=glow;ctx.beginPath();ctx.arc(x,y,r*2.8,0,Math.PI*2);ctx.fill();
+    }
+  }
+  function renderInks(){
+    const now=Date.now();if(now>laserHideAt)laserPoint=null;if(now>audienceLaserHideAt)audienceLaser=null;
+    drawInk(document.getElementById('ppt-presenter-ink'),circles,laserPoint,draftCircle);
+    drawInk(document.getElementById('ppt-audience-ink'),audienceCircles,audienceLaser,null);
+  }
+  function setAnnotationTool(tool){
+    annotationTool=annotationTool===tool?'none':tool;annotationPointerDown=false;draftCircle=null;
+    const canvas=document.getElementById('ppt-presenter-ink');canvas?.classList.toggle('is-active',annotationTool!=='none');
+    document.querySelectorAll('[data-ppt-tool]').forEach(button=>button.classList.toggle('is-active',button.dataset.pptTool===annotationTool));
+    renderInks();
+  }
+  function annotationPoint(event){
+    const canvas=event.currentTarget,rect=canvas.getBoundingClientRect();
+    return{x:Math.max(0,Math.min(1,(event.clientX-rect.left)/rect.width)),y:Math.max(0,Math.min(1,(event.clientY-rect.top)/rect.height))};
+  }
+  function onAnnotationPointerDown(event){
+    if(annotationTool!=='circle')return;event.preventDefault();annotationPointerDown=true;annotationStart=annotationPoint(event);draftCircle={x1:annotationStart.x,y1:annotationStart.y,x2:annotationStart.x,y2:annotationStart.y};event.currentTarget.setPointerCapture?.(event.pointerId);renderInks();
+  }
+  function onAnnotationPointerMove(event){
+    if(annotationTool==='laser'){
+      const point=annotationPoint(event);laserPoint=point;laserHideAt=Date.now()+650;
+      if(Date.now()-lastLaserSent>32){lastLaserSent=Date.now();emit({type:'laser',index:idx,point},{persist:false});}renderInks();return;
+    }
+    if(annotationTool==='circle'&&annotationPointerDown&&draftCircle){const point=annotationPoint(event);draftCircle.x2=point.x;draftCircle.y2=point.y;renderInks();}
+  }
+  function onAnnotationPointerUp(event){
+    if(annotationTool!=='circle'||!annotationPointerDown||!draftCircle)return;event.preventDefault();annotationPointerDown=false;
+    const circle={...draftCircle};draftCircle=null;
+    if(Math.abs(circle.x2-circle.x1)>.012&&Math.abs(circle.y2-circle.y1)>.012){circles.push(circle);emit({type:'circle',index:idx,circle});}
+    renderInks();
+  }
+  function onAnnotationPointerLeave(){
+    if(annotationTool==='laser'){laserPoint=null;emit({type:'laser',index:idx,point:null},{persist:false});renderInks();}
+  }
+  function clearAnnotations(broadcast=true){circles=[];draftCircle=null;laserPoint=null;if(broadcast)emit({type:'clear',index:idx});renderInks();}
+
   function mountShell(){
     if(document.getElementById('ppt-presenter'))return;
-    document.body.insertAdjacentHTML('beforeend',`<div id="ppt-presenter" aria-label="演讲者视图">
-      <div class="ppt-presenter-top"><div><div class="ppt-presenter-brand">演讲者视图</div><div class="ppt-presenter-meta"><span id="ppt-plan"></span></div></div><div class="ppt-presenter-meta"><span id="ppt-sync" class="ppt-sync" data-state="disconnected" title="表示观众页面的软件同步状态，不代表 HDMI 等物理线缆状态">观众屏 · 未连接</span><button id="ppt-reopen" class="ppt-ui-btn" type="button">重新打开观众屏</button><button id="ppt-exit" class="ppt-ui-btn" type="button">退出</button></div></div>
-      <div class="ppt-presenter-main"><div class="ppt-preview-stack"><div class="ppt-stage-card"><div class="ppt-stage-label"><span>当前页</span><span id="ppt-current-label"></span></div><div class="ppt-frame-viewport"><iframe id="ppt-current-frame" class="ppt-frame" title="当前页预览"></iframe></div></div><div class="ppt-stage-card" id="ppt-next-card"><div class="ppt-stage-label"><span>下一页</span><span id="ppt-next-label"></span></div><div class="ppt-frame-viewport"><iframe id="ppt-next-frame" class="ppt-frame ppt-next-frame" title="下一页预览"></iframe></div></div></div>
+    document.body.insertAdjacentHTML('beforeend',`<div id="ppt-presenter" data-layout="${layoutMode}" aria-label="演讲者视图">
+      <div class="ppt-presenter-top"><div><div class="ppt-presenter-brand">演讲者视图</div><div class="ppt-presenter-meta"><span id="ppt-plan"></span><span id="ppt-section" hidden></span></div></div><div class="ppt-presenter-meta"><span id="ppt-sync" class="ppt-sync" data-state="disconnected" title="表示观众页面的软件同步状态，不代表 HDMI 等物理线缆状态">观众屏 · 未连接</span><button id="ppt-preflight" class="ppt-ui-btn" type="button">检查</button><button id="ppt-settings" class="ppt-ui-btn" type="button">设置</button><button id="ppt-reopen" class="ppt-ui-btn" type="button">重新打开观众屏</button><button id="ppt-exit" class="ppt-ui-btn" type="button">退出</button></div></div>
+      <div class="ppt-presenter-main"><div class="ppt-preview-stack"><div class="ppt-stage-card"><div class="ppt-stage-label"><span>当前页</span><span class="ppt-annotation-tools"><button class="ppt-ui-btn" data-ppt-tool="laser" type="button" title="激光笔（L）">激光</button><button class="ppt-ui-btn" data-ppt-tool="circle" type="button" title="圈选（C）">圈选</button><button id="ppt-ink-clear" class="ppt-ui-btn ppt-clear-btn" type="button" title="清除标记（X）">清除</button></span><span id="ppt-current-label"></span></div><div class="ppt-frame-viewport"><iframe id="ppt-current-frame" class="ppt-frame" title="当前页预览"></iframe><canvas id="ppt-presenter-ink" class="ppt-annotation-layer" aria-label="演讲标注层"></canvas></div></div><div class="ppt-stage-card" id="ppt-next-card"><div class="ppt-stage-label"><span>下一页</span><span id="ppt-next-label"></span></div><div class="ppt-frame-viewport"><iframe id="ppt-next-frame" class="ppt-frame ppt-next-frame" title="下一页预览"></iframe></div></div></div>
       <div class="ppt-notes-card"><div class="ppt-notes-head"><div id="ppt-notes-title" class="ppt-notes-title"></div><div class="ppt-notes-sub"><span id="ppt-note-meta"></span><span class="ppt-notes-tools"><span id="ppt-saved" class="ppt-saved">已保存</span><button id="ppt-note-smaller" class="ppt-ui-btn" type="button" title="缩小备注字号">A−</button><button id="ppt-note-larger" class="ppt-ui-btn" type="button" title="放大备注字号">A+</button></span></div></div><textarea id="ppt-note-editor" class="ppt-note-editor" spellcheck="false" aria-label="本页演讲备注"></textarea></div></div>
-      <div class="ppt-presenter-bottom"><div class="ppt-timer"><span id="ppt-clock" class="ppt-clock">00:00</span><button id="ppt-timer-toggle" class="ppt-ui-btn" type="button">开始计时</button><button id="ppt-timer-reset" class="ppt-ui-btn" type="button">重置</button></div><div class="ppt-controls"><button id="ppt-first" class="ppt-ui-btn" type="button">首页</button><button id="ppt-prev" class="ppt-ui-btn" type="button">上一页</button><button id="ppt-grid" class="ppt-ui-btn ppt-primary" type="button">总览</button><button id="ppt-next" class="ppt-ui-btn" type="button">下一页</button><button id="ppt-last" class="ppt-ui-btn" type="button">尾页</button></div><div class="ppt-page-state"><strong id="ppt-page-title"></strong><span id="ppt-page-count"></span></div></div>
+      <div class="ppt-presenter-bottom"><div class="ppt-timer"><div class="ppt-time-copy"><div id="ppt-clock" class="ppt-clock">00:00</div><div id="ppt-time-detail" class="ppt-time-detail">本页 00:00 / —</div></div><button id="ppt-timer-toggle" class="ppt-ui-btn" type="button">开始</button><button id="ppt-timer-reset" class="ppt-ui-btn" type="button">重置</button><button id="ppt-rehearsal" class="ppt-ui-btn" type="button">排练</button></div><div class="ppt-controls"><button id="ppt-first" class="ppt-ui-btn" type="button">首页</button><button id="ppt-prev" class="ppt-ui-btn" type="button">上一页</button><button id="ppt-grid" class="ppt-ui-btn ppt-primary" type="button">总览</button><button id="ppt-next" class="ppt-ui-btn" type="button">下一页</button><button id="ppt-last" class="ppt-ui-btn" type="button">尾页</button></div><div class="ppt-page-state"><strong id="ppt-page-title"></strong><span id="ppt-page-count"></span><br><button id="ppt-auto-toggle" class="ppt-ui-btn ppt-auto-state" type="button">自动翻页 · 关闭</button></div></div>
+      <div id="ppt-dialog" class="ppt-dialog" hidden><div class="ppt-dialog-panel" role="dialog" aria-modal="true"><div class="ppt-dialog-head"><div id="ppt-dialog-title" class="ppt-dialog-title"></div><button id="ppt-dialog-close" class="ppt-ui-btn" type="button">关闭</button></div><div id="ppt-dialog-body" class="ppt-dialog-body"></div></div></div>
     </div>`);
     document.getElementById('ppt-reopen').onclick=reopenAudience;
     document.getElementById('ppt-exit').onclick=exitPresenter;
+    document.getElementById('ppt-preflight').onclick=openPreflight;
+    document.getElementById('ppt-settings').onclick=openSettings;
     document.getElementById('ppt-first').onclick=()=>go(0,{force:true});
     document.getElementById('ppt-prev').onclick=()=>go(idx-1,{force:true});
     document.getElementById('ppt-grid').onclick=toggleOverview;
@@ -1626,13 +1749,20 @@ window.__pptPresenter=(()=>{
     document.getElementById('ppt-last').onclick=()=>go(idx===total-1?0:total-1,{force:true});
     document.getElementById('ppt-timer-toggle').onclick=toggleTimer;
     document.getElementById('ppt-timer-reset').onclick=resetTimer;
+    document.getElementById('ppt-rehearsal').onclick=toggleRehearsal;
+    document.getElementById('ppt-auto-toggle').onclick=toggleAutoAdvance;
     document.getElementById('ppt-note-smaller').onclick=()=>setNoteSize(noteSize-1);
     document.getElementById('ppt-note-larger').onclick=()=>setNoteSize(noteSize+1);
     document.getElementById('ppt-note-editor').addEventListener('input',saveNote);
+    document.querySelectorAll('[data-ppt-tool]').forEach(button=>button.onclick=()=>setAnnotationTool(button.dataset.pptTool));
+    document.getElementById('ppt-ink-clear').onclick=()=>clearAnnotations(true);
+    const ink=document.getElementById('ppt-presenter-ink');
+    ink.addEventListener('pointerdown',onAnnotationPointerDown);ink.addEventListener('pointermove',onAnnotationPointerMove);ink.addEventListener('pointerup',onAnnotationPointerUp);ink.addEventListener('pointercancel',onAnnotationPointerUp);ink.addEventListener('pointerleave',onAnnotationPointerLeave);
+    document.getElementById('ppt-dialog-close').onclick=closeDialog;
+    document.getElementById('ppt-dialog').onclick=event=>{if(event.target.id==='ppt-dialog')closeDialog();};
     if('ResizeObserver'in window){presenterFrameObserver=new ResizeObserver(()=>requestAnimationFrame(fitPresenterFrames));presenterFrameObserver.observe(document.querySelector('.ppt-preview-stack'));}
     else addEventListener('resize',fitPresenterFrames);
-    setNoteSize(noteSize,false);
-    requestAnimationFrame(fitPresenterFrames);
+    setNoteSize(noteSize,false);applyLayout(layoutMode,false);requestAnimationFrame(fitPresenterFrames);
   }
   function updateShell(){
     if(mode!=='presenter')return;mountShell();
@@ -1643,28 +1773,143 @@ window.__pptPresenter=(()=>{
     document.getElementById('ppt-current-label').textContent=`${idx+1} / ${total}`;
     document.getElementById('ppt-next-label').textContent=idx===total-1?'已到尾页':`${next+1} / ${total}`;
     document.getElementById('ppt-notes-title').textContent=n.title||`第 ${idx+1} 页`;
-    document.getElementById('ppt-note-meta').textContent=`建议 ${Number(n.minutes||0).toFixed(1)} 分钟 · ${id}`;
+    const target=plannedMsAt(idx);document.getElementById('ppt-note-meta').textContent=`建议 ${target?(target/60000).toFixed(1):'—'} 分钟 · ${id}`;
     document.getElementById('ppt-page-title').textContent=n.title||`第 ${idx+1} 页`;
     document.getElementById('ppt-page-count').textContent=`第 ${idx+1} / ${total} 页 · ${Math.round(((idx+1)/total)*100)}%`;
-    document.getElementById('ppt-plan').textContent=`计划 ${notes().reduce((s,x)=>s+Number(x.minutes||0),0).toFixed(1)} 分钟`;
     document.getElementById('ppt-first').disabled=idx===0;document.getElementById('ppt-prev').disabled=idx===0;document.getElementById('ppt-next').disabled=idx===total-1;
     document.getElementById('ppt-last').textContent=idx===total-1?'重新开始':'尾页';
-    if(renderedNoteId!==id){renderedNoteId=id;editor.value=localStorage.getItem(noteStorageKey(id))??generatedNote(n);editor.scrollTop=0;document.getElementById('ppt-saved').textContent='已保存';}
-    requestAnimationFrame(fitPresenterFrames);
-    updateSyncStatus();
+    if(renderedNoteId!==id){renderedNoteId=id;editor.value=loadNoteValue(id,idx,n);editor.scrollTop=0;document.getElementById('ppt-saved').textContent='已保存';}
+    requestAnimationFrame(fitPresenterFrames);renderTimer();updateSyncStatus();
   }
   function saveNote(){
     const saved=document.getElementById('ppt-saved');saved.textContent='保存中…';saved.classList.remove('ppt-saved');clearTimeout(saveTimer);
     saveTimer=setTimeout(()=>{localStorage.setItem(noteStorageKey(renderedNoteId),document.getElementById('ppt-note-editor').value);saved.textContent='已保存';saved.classList.add('ppt-saved');},300);
   }
-  function setNoteSize(value,persist=true){
-    noteSize=Math.max(14,Math.min(26,value));document.documentElement.style.setProperty('--ppt-note-size',`${noteSize}px`);
-    if(persist)localStorage.setItem('guizang-ppt-note-size',String(noteSize));
-  }
+  function setNoteSize(value,persist=true){noteSize=Math.max(14,Math.min(26,value));document.documentElement.style.setProperty('--ppt-note-size',`${noteSize}px`);if(persist)localStorage.setItem('guizang-ppt-note-size',String(noteSize));}
   function currentElapsed(){return elapsed+(timerRunning?Date.now()-timerStartedAt:0);}
-  function renderTimer(){const sec=Math.floor(currentElapsed()/1000),clock=document.getElementById('ppt-clock');if(clock)clock.textContent=`${String(Math.floor(sec/60)).padStart(2,'0')}:${String(sec%60).padStart(2,'0')}`;}
-  function toggleTimer(){if(timerRunning){elapsed=currentElapsed();timerRunning=false;}else{timerStartedAt=Date.now();timerRunning=true;}document.getElementById('ppt-timer-toggle').textContent=timerRunning?'暂停':'继续';renderTimer();}
-  function resetTimer(){elapsed=0;timerRunning=false;timerStartedAt=0;document.getElementById('ppt-timer-toggle').textContent='开始计时';renderTimer();}
+  function currentSlideElapsed(i=idx){return slideElapsed[i]+(timerRunning&&timedSlideIndex===i?Date.now()-slideTimerStartedAt:0);}
+  function commitRunningTime(now=Date.now()){
+    if(!timerRunning)return;elapsed+=now-timerStartedAt;slideElapsed[timedSlideIndex]+=now-slideTimerStartedAt;timerStartedAt=now;slideTimerStartedAt=now;
+  }
+  function rollSlideTimer(nextIndex){if(timerRunning)commitRunningTime();timedSlideIndex=nextIndex;slideTimerStartedAt=Date.now();}
+  function renderTimer(){
+    const totalUsed=currentElapsed(),pageUsed=currentSlideElapsed(),target=plannedMsAt(idx),clock=document.getElementById('ppt-clock');
+    if(clock)clock.textContent=durationText(totalUsed);
+    const detail=document.getElementById('ppt-time-detail');
+    if(detail){
+      detail.classList.toggle('is-over',Boolean(target&&pageUsed>target));
+      detail.textContent=target?(pageUsed<=target?`本页 ${durationText(pageUsed)} / ${durationText(target)} · 剩余 ${durationText(target-pageUsed)}`:`本页 ${durationText(pageUsed)} / ${durationText(target)} · 超时 ${durationText(pageUsed-target)}`):`本页 ${durationText(pageUsed)} / —`;
+    }
+    const totalPlan=totalPlannedMs(),plan=document.getElementById('ppt-plan');
+    if(plan)plan.textContent=totalPlan?`计划 ${Number(totalPlan/60000).toFixed(1)} 分钟 · 预计 ${clockTime(Date.now()+Math.max(0,totalPlan-totalUsed))}`:'计划 —';
+    const section=sectionInfo(idx),sectionEl=document.getElementById('ppt-section');
+    if(sectionEl){sectionEl.hidden=!section;sectionEl.textContent=section?`${section.name} · ${section.position}/${section.count}${section.planned?` · 剩余 ${durationText(Math.max(0,section.planned-section.used))}`:''}`:'';}
+    const timerButton=document.getElementById('ppt-timer-toggle');if(timerButton)timerButton.textContent=timerRunning?'暂停':(totalUsed?'继续':'开始');
+    const rehearsalButton=document.getElementById('ppt-rehearsal');if(rehearsalButton){rehearsalButton.textContent=rehearsalActive?'结束排练':'排练';rehearsalButton.classList.toggle('ppt-rehearsal-on',rehearsalActive);}
+    renderAutoState();
+  }
+  function toggleTimer(){const now=Date.now();if(timerRunning){commitRunningTime(now);timerRunning=false;}else{timerStartedAt=now;slideTimerStartedAt=now;timedSlideIndex=idx;timerRunning=true;}renderTimer();}
+  function resetTimer(){
+    elapsed=0;slideElapsed=Array(total).fill(0);timedSlideIndex=idx;
+    if(timerRunning){timerStartedAt=Date.now();slideTimerStartedAt=timerStartedAt;}else{timerStartedAt=0;slideTimerStartedAt=0;}
+    renderTimer();
+  }
+  function rehearsalHistory(){try{return JSON.parse(localStorage.getItem(storageKey('rehearsals'))||'[]');}catch(e){return[];}}
+  function toggleRehearsal(){
+    if(rehearsalActive){finishRehearsal(true);return;}
+    rehearsalActive=true;if(timerRunning){commitRunningTime();timerRunning=false;}resetTimer();toggleTimer();renderTimer();
+  }
+  function finishRehearsal(showSummary){
+    if(!rehearsalActive)return;if(timerRunning){commitRunningTime();timerRunning=false;}
+    const result={endedAt:Date.now(),totalMs:elapsed,slides:slideElapsed.map((ms,i)=>({index:i,id:slideId(i),title:noteAt(i).title||slideId(i),ms,targetMs:plannedMsAt(i)}))};
+    const history=rehearsalHistory();history.unshift(result);try{localStorage.setItem(storageKey('rehearsals'),JSON.stringify(history.slice(0,5)));}catch(e){}
+    rehearsalActive=false;renderTimer();if(showSummary)openRehearsalSummary(result,history.slice(0,5));
+  }
+  function openRehearsalSummary(result,history){
+    const rows=result.slides.filter(item=>item.ms>0).map(item=>`<tr><td>${item.index+1}</td><td>${escapeHTML(item.title)}</td><td>${durationText(item.ms)}</td><td>${item.targetMs?signedDuration(item.ms-item.targetMs):'—'}</td></tr>`).join('');
+    const recent=history.map(item=>`<div class="ppt-dialog-row"><span>${new Date(item.endedAt).toLocaleString()}</span><strong>${durationText(item.totalMs)}</strong></div>`).join('');
+    openDialog('排练记录',`<div class="ppt-dialog-section"><div class="ppt-dialog-row"><span>本次总时长</span><strong>${durationText(result.totalMs)}</strong></div><table class="ppt-summary"><thead><tr><th>#</th><th>页面</th><th>实际</th><th>与计划相比</th></tr></thead><tbody>${rows||'<tr><td colspan="4">没有记录到页面时间</td></tr>'}</tbody></table></div><div class="ppt-dialog-section"><h3>最近排练</h3>${recent}</div>`);
+  }
+
+  function autoDurationMs(i=idx){const explicit=Number(noteAt(i).autoAdvanceSeconds);const seconds=Number.isFinite(explicit)&&explicit>0?explicit:autoGlobalSeconds;return seconds>0?seconds*1000:null;}
+  function armAutoAdvance(){autoDeadline=0;autoRemainingMs=autoDurationMs()||0;}
+  function autoBlockedReason(){
+    if(overviewOn)return'总览中';if(annotationTool!=='none')return'标注中';if(screenMode!=='normal')return'观众屏已暂停';if(document.hidden)return'窗口不可见';
+    const dialog=document.getElementById('ppt-dialog');if(dialog&&!dialog.hidden)return'设置中';
+    if(audienceOpenedAt&&syncState()!=='synced')return'等待观众屏同步';return'';
+  }
+  function updateAutoAdvance(){
+    if(!autoEnabled)return;
+    const duration=autoDurationMs();if(!duration||idx===total-1)return;
+    const blocked=autoBlockedReason(),now=Date.now();
+    if(blocked){if(autoDeadline){autoRemainingMs=Math.max(0,autoDeadline-now);autoDeadline=0;}return;}
+    if(!autoDeadline)autoDeadline=now+(autoRemainingMs||duration);
+    autoRemainingMs=Math.max(0,autoDeadline-now);
+    if(now>=autoDeadline){autoDeadline=0;autoRemainingMs=0;go(idx+1,{force:true});}
+  }
+  function renderAutoState(){
+    const button=document.getElementById('ppt-auto-toggle');if(!button)return;
+    const duration=autoDurationMs(),blocked=autoEnabled?autoBlockedReason():'';
+    button.classList.toggle('is-on',autoEnabled&&!blocked);button.classList.toggle('is-paused',autoEnabled&&Boolean(blocked));
+    if(!autoEnabled)button.textContent='自动翻页 · 关闭';
+    else if(!duration)button.textContent='自动翻页 · 等待时长';
+    else if(idx===total-1)button.textContent='自动翻页 · 已结束';
+    else if(blocked)button.textContent=`自动翻页 · ${blocked}`;
+    else button.textContent=`自动翻页 · ${durationText(autoRemainingMs||duration)}`;
+  }
+  function toggleAutoAdvance(){
+    if(!autoEnabled&&!autoDurationMs()){openSettings();return;}
+    autoEnabled=!autoEnabled;localStorage.setItem(storageKey('auto-enabled'),autoEnabled?'1':'0');armAutoAdvance();renderAutoState();
+  }
+
+  function openDialog(title,html){
+    const dialog=document.getElementById('ppt-dialog');if(!dialog)return;
+    document.getElementById('ppt-dialog-title').textContent=title;document.getElementById('ppt-dialog-body').innerHTML=html;dialog.hidden=false;renderAutoState();
+  }
+  function closeDialog(){const dialog=document.getElementById('ppt-dialog');if(dialog)dialog.hidden=true;renderAutoState();}
+  function applyLayout(value,persist=true){
+    layoutMode=['balanced','slides','notes'].includes(value)?value:'balanced';
+    document.getElementById('ppt-presenter')?.setAttribute('data-layout',layoutMode);
+    if(persist)localStorage.setItem(storageKey('layout'),layoutMode);requestAnimationFrame(fitPresenterFrames);
+  }
+  function applyAudienceScreen(value){
+    const cover=document.getElementById('ppt-audience-cover');if(!cover)return;
+    if(value==='black'||value==='white'){cover.style.display='block';cover.style.background=value;}else cover.style.display='none';
+  }
+  function setScreenMode(value){
+    const next=['normal','black','white','frozen'].includes(value)?value:'normal',wasFrozen=audienceFrozen;
+    screenMode=next;audienceFrozen=next==='frozen';emit({type:'screen',mode:next});
+    if(wasFrozen&&!audienceFrozen)sendGoto(true);updateSyncStatus();armAutoAdvance();renderAutoState();
+  }
+  function openSettings(){
+    openDialog('演示设置',`<div class="ppt-dialog-section"><h3>自动翻页</h3><div class="ppt-dialog-grid"><label class="ppt-dialog-row"><span>启用</span><input id="ppt-auto-enabled-setting" type="checkbox" ${autoEnabled?'checked':''}></label><div class="ppt-field"><label for="ppt-auto-seconds-setting">全局间隔（秒）</label><input id="ppt-auto-seconds-setting" type="number" min="1" step="1" value="${autoGlobalSeconds||''}" placeholder="未设置"></div><button id="ppt-settings-save" class="ppt-ui-btn" type="button">保存自动翻页</button></div><p class="ppt-muted">页面里的 autoAdvanceSeconds 优先于全局间隔；建议讲述时间 minutes 不会自动触发翻页。</p></div><div class="ppt-dialog-section"><h3>演讲者布局</h3><div class="ppt-dialog-grid"><button class="ppt-ui-btn" data-layout-choice="balanced" type="button">均衡</button><button class="ppt-ui-btn" data-layout-choice="slides" type="button">页面优先</button><button class="ppt-ui-btn" data-layout-choice="notes" type="button">备注优先</button></div></div><div class="ppt-dialog-section"><h3>观众屏</h3><div class="ppt-dialog-grid"><button class="ppt-ui-btn" data-screen-choice="normal" type="button">正常显示</button><button class="ppt-ui-btn" data-screen-choice="black" type="button">黑屏 B</button><button class="ppt-ui-btn" data-screen-choice="white" type="button">白屏 W</button><button class="ppt-ui-btn" data-screen-choice="frozen" type="button">冻结 F</button></div></div><div class="ppt-dialog-section"><button id="ppt-open-shortcuts" class="ppt-ui-btn" type="button">查看快捷键</button></div>`);
+    document.querySelectorAll('[data-layout-choice]').forEach(button=>{button.classList.toggle('ppt-primary',button.dataset.layoutChoice===layoutMode);button.onclick=()=>{applyLayout(button.dataset.layoutChoice);openSettings();};});
+    document.querySelectorAll('[data-screen-choice]').forEach(button=>{button.classList.toggle('ppt-primary',button.dataset.screenChoice===screenMode);button.onclick=()=>{setScreenMode(button.dataset.screenChoice);openSettings();};});
+    document.getElementById('ppt-settings-save').onclick=()=>{autoEnabled=document.getElementById('ppt-auto-enabled-setting').checked;autoGlobalSeconds=Math.max(0,Number(document.getElementById('ppt-auto-seconds-setting').value||0));localStorage.setItem(storageKey('auto-enabled'),autoEnabled?'1':'0');localStorage.setItem(storageKey('auto-seconds'),String(autoGlobalSeconds));armAutoAdvance();closeDialog();};
+    document.getElementById('ppt-open-shortcuts').onclick=openShortcuts;
+  }
+  function openShortcuts(){
+    const items=[['← / →','上一页 / 下一页'],['Home / End','首页 / 尾页'],['Esc','总览；标注工具激活时先退出工具'],['L','激光笔'],['C','圈选'],['X','清除标记'],['B / W','观众屏黑屏 / 白屏'],['F','冻结 / 恢复观众屏'],['A','开启 / 关闭自动翻页'],['R','开始 / 结束排练'],['?','快捷键说明']];
+    openDialog('快捷键',`<div class="ppt-shortcuts">${items.map(([key,label])=>`<kbd>${key}</kbd><span>${label}</span>`).join('')}</div>`);
+  }
+  function preflightChecks(){
+    const images=[...document.images],videos=[...document.querySelectorAll('video')],frame=document.getElementById('ppt-current-frame'),rect=frame?.getBoundingClientRect();
+    return[
+      {label:'观众屏连接',ok:['synced','frozen'].includes(syncState()),detail:`当前状态：${document.getElementById('ppt-sync')?.textContent||'未连接'}`},
+      {label:'弹窗权限',ok:!popupBlocked,detail:popupBlocked?'浏览器阻止了观众窗口':'未检测到弹窗拦截'},
+      {label:'全屏状态',ok:Boolean(document.fullscreenElement),warn:true,detail:document.fullscreenElement?'已进入全屏':'尚未全屏，可在演讲前进入'},
+      {label:'字体加载',ok:!document.fonts||document.fonts.status==='loaded',detail:document.fonts?`状态：${document.fonts.status}`:'浏览器不提供字体状态'},
+      {label:'图片资源',ok:images.every(image=>image.complete&&image.naturalWidth>0),detail:`${images.filter(image=>image.complete&&image.naturalWidth>0).length} / ${images.length} 已加载`},
+      {label:'视频资源',ok:videos.every(video=>video.readyState>=2),detail:videos.length?`${videos.filter(video=>video.readyState>=2).length} / ${videos.length} 可播放`:'没有视频'},
+      {label:'当前页 16:9',ok:Boolean(rect&&Math.abs(rect.width/rect.height-16/9)<.003),detail:rect?`${Math.round(rect.width)} × ${Math.round(rect.height)}`:'尚未渲染'}
+    ];
+  }
+  function openPreflight(){
+    const checks=preflightChecks(),html=checks.map(item=>`<div class="ppt-dialog-row"><div class="ppt-check ${item.ok?'is-ok':(item.warn?'is-warn':'')}"><span class="ppt-check-dot"></span><span><strong>${item.label}</strong><br><span class="ppt-muted">${item.detail}</span></span></div><strong>${item.ok?'正常':(item.warn?'建议':'异常')}</strong></div>`).join('');
+    openDialog('演前检查',`<div class="ppt-dialog-section">${html}</div><div class="ppt-dialog-section"><button id="ppt-preflight-refresh" class="ppt-ui-btn" type="button">重新检查</button> <button id="ppt-enter-fullscreen" class="ppt-ui-btn" type="button">进入全屏</button></div><p class="ppt-muted">这里只能检查浏览器和观众页面的软件状态，不能确认 HDMI、转接器或投影仪线缆是否物理连接。</p>`);
+    document.getElementById('ppt-preflight-refresh').onclick=openPreflight;
+    document.getElementById('ppt-enter-fullscreen').onclick=async()=>{try{await document.documentElement.requestFullscreen();}catch(e){}openPreflight();};
+  }
 
   function initTransport(){
     if(transportReady)return;transportReady=true;
@@ -1672,62 +1917,89 @@ window.__pptPresenter=(()=>{
     addEventListener('message',e=>receive(e.data));
     addEventListener('storage',e=>{if(e.key===syncKey()&&e.newValue){try{receive(JSON.parse(e.newValue));}catch(err){}}});
   }
-  function emit(payload){
+  function emit(payload,{persist=true}={}){
     const message={__guizangPptSync:1,session,role:mode,...payload,at:Date.now(),nonce:Math.random().toString(36).slice(2)};
     try{channel?.postMessage(message);}catch(e){}
-    try{localStorage.setItem(syncKey(),JSON.stringify(message));}catch(e){}
+    if(persist)try{localStorage.setItem(syncKey(),JSON.stringify(message));}catch(e){}
     try{if(mode==='presenter'&&audienceWindow&&!audienceWindow.closed)audienceWindow.postMessage(message,'*');}catch(e){}
     try{if(mode==='audience'&&window.opener&&!window.opener.closed)window.opener.postMessage(message,'*');}catch(e){}
   }
   function receive(message){
     if(!message||message.__guizangPptSync!==1||message.session!==session||message.role===mode)return;
+    if(message.nonce){if(seenNonceSet.has(message.nonce))return;seenNonceSet.add(message.nonce);seenNonces.push(message.nonce);if(seenNonces.length>256)seenNonceSet.delete(seenNonces.shift());}
     if(mode==='presenter'){
       if(message.type==='ready'){popupBlocked=false;sendGoto(true);}
       if(message.type==='ack'){lastAckAt=Date.now();lastAckIndex=Number(message.index);lastAckSeq=Number(message.seq);updateSyncStatus();}
       return;
     }
-    if(mode==='audience'&&(message.type==='goto'||message.type==='ping')){
-      if(message.type==='goto')go(Number(message.index),{force:true});
+    if(mode!=='audience')return;
+    if(message.type==='screen'){applyAudienceScreen(message.mode);return;}
+    if(message.type==='laser'&&Number(message.index)===idx){audienceLaser=message.point||null;audienceLaserHideAt=Date.now()+650;renderInks();return;}
+    if(message.type==='circle'&&Number(message.index)===idx&&message.circle){audienceCircles.push(message.circle);renderInks();return;}
+    if(message.type==='clear'&&Number(message.index)===idx){audienceCircles=[];renderInks();return;}
+    if(message.type==='goto'||message.type==='ping'){
+      if(message.type==='goto'){audienceCircles=Array.isArray(message.circles)?message.circles:[];applyAudienceScreen(message.screenMode);go(Number(message.index),{force:true});}
       emit({type:'ack',index:idx,seq:Number(message.seq)});
     }
   }
-  function sendGoto(force=false){if(mode!=='presenter')return;if(force||lastAckIndex!==idx)seq++;emit({type:'goto',index:idx,seq});updateSyncStatus();}
+  function sendGoto(force=false){
+    if(mode!=='presenter'||audienceFrozen)return;if(force||lastAckIndex!==idx)seq++;
+    emit({type:'goto',index:idx,seq,screenMode,circles});updateSyncStatus();
+  }
   function syncState(){
-    if(popupBlocked)return'blocked';
-    if(audienceWindow&&audienceWindow.closed)return'disconnected';
+    if(popupBlocked)return'blocked';if(audienceWindow&&audienceWindow.closed)return'disconnected';if(audienceFrozen)return'frozen';
     if(!lastAckAt)return audienceOpenedAt&&Date.now()-audienceOpenedAt<2600?'connecting':(audienceOpenedAt?'unsynced':'disconnected');
-    if(Date.now()-lastAckAt>2600||lastAckIndex!==idx||lastAckSeq<seq)return'unsynced';
-    return'synced';
+    if(Date.now()-lastAckAt>2600||lastAckIndex!==idx||lastAckSeq<seq)return'unsynced';return'synced';
   }
   function updateSyncStatus(){
     const el=document.getElementById('ppt-sync');if(!el)return;const state=syncState();
-    const labels={blocked:'弹窗被拦截',disconnected:'未连接',connecting:'连接中',unsynced:'未同步',synced:`已同步 · 第 ${idx+1} 页`};
+    const labels={blocked:'弹窗被拦截',disconnected:'未连接',connecting:'连接中',unsynced:'未同步',frozen:'已冻结',synced:`已同步 · 第 ${idx+1} 页`};
     el.dataset.state=state;el.textContent=`观众屏 · ${labels[state]}`;
   }
   function reopenAudience(){
     initTransport();popupBlocked=false;audienceOpenedAt=Date.now();lastAckAt=0;lastAckIndex=-1;lastAckSeq=-1;
+    if(audienceFrozen){audienceFrozen=false;screenMode='normal';}
     audienceWindow=window.open(frameUrl('audience',idx),`guizang-ppt-audience-${session}`,'popup=yes,width=1440,height=900');
     if(!audienceWindow)popupBlocked=true;updateSyncStatus();
   }
   function enterPresenter(openAudience=true){
     if(mode==='presenter')return;lowPowerBeforePresenter=window.__lowPowerMode;mode='presenter';initTransport();mountShell();
     document.body.classList.remove('ppt-audience','ppt-preview');document.body.classList.add('ppt-presenter');document.title=`演讲者视图 · ${originalTitle}`;
-    window.__setLowPowerMode?.(true,{persist:false});updateShell();if(openAudience)reopenAudience();
+    window.__setLowPowerMode?.(true,{persist:false});updateShell();armAutoAdvance();if(openAudience)reopenAudience();
   }
   function exitPresenter(){
-    emit({type:'bye'});mode='deck';document.body.classList.remove('ppt-presenter');document.title=originalTitle;window.__setLowPowerMode?.(lowPowerBeforePresenter,{persist:false});
+    if(rehearsalActive)finishRehearsal(false);else if(timerRunning){commitRunningTime();timerRunning=false;}emit({type:'bye'});mode='deck';document.body.classList.remove('ppt-presenter');document.title=originalTitle;window.__setLowPowerMode?.(lowPowerBeforePresenter,{persist:false});
+  }
+  function initAudience(){
+    mode='audience';document.body.classList.add('ppt-audience');document.title=`观众屏 · ${originalTitle}`;
+    document.body.insertAdjacentHTML('beforeend','<canvas id="ppt-audience-ink" aria-hidden="true"></canvas><div id="ppt-audience-cover" aria-hidden="true"></div>');
+    const resize=()=>{sizeInk(document.getElementById('ppt-audience-ink'),innerWidth,innerHeight);renderInks();};addEventListener('resize',resize);resize();
+    initTransport();emit({type:'ready',index:idx});
   }
-  function initAudience(){mode='audience';document.body.classList.add('ppt-audience');document.title=`观众屏 · ${originalTitle}`;initTransport();emit({type:'ready',index:idx});}
   function initPreview(){mode='preview';document.body.classList.add('ppt-preview');window.__setLowPowerMode?.(true,{persist:false});}
-  function onSlideChange(){if(mode==='presenter'){updateShell();sendGoto();}}
+  function onSlideChange(nextIndex){
+    if(mode!=='presenter')return;rollSlideTimer(nextIndex);circles=[];draftCircle=null;laserPoint=null;annotationPointerDown=false;armAutoAdvance();updateShell();sendGoto();
+  }
   function handleKey(e){
     const editable=e.target?.matches?.('input,textarea,[contenteditable="true"]');
     if(editable){if(e.key==='Escape')e.target.blur();return true;}
     if(mode==='audience'||mode==='preview'){e.preventDefault();return true;}
     if(mode==='deck'&&e.key?.toLowerCase()==='p'&&!e.metaKey&&!e.ctrlKey&&!e.altKey){e.preventDefault();enterPresenter(true);return true;}
     if(mode!=='presenter')return false;
-    if(e.key==='Escape'){e.preventDefault();toggleOverview();return true;}
+    const key=e.key?.toLowerCase();
+    if(e.key==='?'||key==='/'){e.preventDefault();openShortcuts();return true;}
+    const dialog=document.getElementById('ppt-dialog');
+    if(!dialog?.hidden){if(e.key==='Escape'){e.preventDefault();closeDialog();}return true;}
+    if(e.key==='Escape'){e.preventDefault();if(annotationTool!=='none')setAnnotationTool('none');else toggleOverview();return true;}
     if(overviewOn)return true;
+    if(key==='l'){e.preventDefault();setAnnotationTool('laser');return true;}
+    if(key==='c'){e.preventDefault();setAnnotationTool('circle');return true;}
+    if(key==='x'){e.preventDefault();clearAnnotations(true);return true;}
+    if(key==='b'){e.preventDefault();setScreenMode(screenMode==='black'?'normal':'black');return true;}
+    if(key==='w'){e.preventDefault();setScreenMode(screenMode==='white'?'normal':'white');return true;}
+    if(key==='f'){e.preventDefault();setScreenMode(audienceFrozen?'normal':'frozen');return true;}
+    if(key==='a'){e.preventDefault();toggleAutoAdvance();return true;}
+    if(key==='r'){e.preventDefault();toggleRehearsal();return true;}
     if(['ArrowRight','PageDown',' ','ArrowDown'].includes(e.key)){e.preventDefault();go(idx+1,{force:true});return true;}
     if(['ArrowLeft','PageUp','ArrowUp'].includes(e.key)){e.preventDefault();go(idx-1,{force:true});return true;}
     if(e.key==='Home'){e.preventDefault();go(0,{force:true});return true;}
@@ -1740,8 +2012,11 @@ window.__pptPresenter=(()=>{
     document.getElementById('ppt-presenter-btn')?.addEventListener('click',()=>enterPresenter(true));
     if(requestedMode==='audience')initAudience();else if(requestedMode==='preview')initPreview();else if(requestedMode==='presenter')enterPresenter(false);
   }
-  setInterval(()=>{renderTimer();if(mode==='presenter'){if(audienceWindow?.closed)updateSyncStatus();emit({type:'ping',index:idx,seq});updateSyncStatus();}},1000);
-  return{initMode,onSlideChange,handleKey,slideLabel,enterPresenter,reopenAudience};
+  setInterval(()=>{
+    renderTimer();renderInks();updateAutoAdvance();
+    if(mode==='presenter'&&Date.now()-lastPingAt>900){lastPingAt=Date.now();if(audienceWindow?.closed)updateSyncStatus();emit({type:'ping',index:idx,seq});updateSyncStatus();}
+  },250);
+  return{initMode,onSlideChange,handleKey,slideLabel,enterPresenter,reopenAudience,debugState:()=>({mode,idx,session,syncState:syncState(),timerRunning,rehearsalActive,autoEnabled,autoGlobalSeconds,autoRemainingMs,screenMode,annotationTool,circles:[...circles],audienceCircles:[...audienceCircles],layoutMode})};
 })();
 
 addEventListener('keydown',e=>{
diff --git a/assets/template.html b/assets/template.html
index d0e4a37..34bc610 100644
--- a/assets/template.html
+++ b/assets/template.html
@@ -217,23 +217,28 @@
   .ppt-sync{display:inline-flex;align-items:center;gap:8px;padding:7px 11px;border:1px solid #363a43;border-radius:999px;color:#d2d6dc;background:#1b1e24}
   .ppt-sync::before{content:"";width:8px;height:8px;border-radius:50%;background:#818894}
   .ppt-sync[data-state="synced"]::before{background:#72df99;box-shadow:0 0 0 4px rgba(114,223,153,.12)}
-  .ppt-sync[data-state="connecting"]::before{background:#f0c766}.ppt-sync[data-state="unsynced"]::before,.ppt-sync[data-state="blocked"]::before{background:#ff9e64}.ppt-sync[data-state="disconnected"]::before{background:#ff6b72}
+  .ppt-sync[data-state="connecting"]::before,.ppt-sync[data-state="frozen"]::before{background:#f0c766}.ppt-sync[data-state="unsynced"]::before,.ppt-sync[data-state="blocked"]::before{background:#ff9e64}.ppt-sync[data-state="disconnected"]::before{background:#ff6b72}
   .ppt-ui-btn{appearance:none;border:1px solid #3a3e48;background:#20242a;color:#f6f7f8;border-radius:8px;padding:9px 13px;font:600 14px/1 Inter,"Noto Sans SC",sans-serif;cursor:pointer}
   .ppt-ui-btn:hover{background:#2a2f37;border-color:#525864}.ppt-ui-btn:focus-visible{outline:2px solid #84a8ff;outline-offset:2px}.ppt-ui-btn:disabled{opacity:.28;cursor:not-allowed}
   .ppt-presenter-main{display:grid;grid-template-columns:minmax(0,1.75fr) minmax(300px,.75fr);gap:18px;min-height:0;padding:18px 24px}
   .ppt-preview-stack{display:grid;grid-template-rows:minmax(0,1fr) clamp(132px,22vh,210px);gap:16px;min-width:0;min-height:0}
   .ppt-stage-card,.ppt-notes-card{background:#171a20;border:1px solid #2b2f37;border-radius:12px;overflow:hidden}
   .ppt-stage-card{display:grid;grid-template-rows:auto minmax(0,1fr);min-width:0;min-height:0}
-  .ppt-stage-label{display:flex;justify-content:space-between;align-items:center;padding:11px 14px;color:#aeb4be;font-size:13px;border-bottom:1px solid #292d34}
-  .ppt-frame-viewport{display:grid;place-items:center;min-width:0;min-height:0;overflow:hidden;background:#08090b}
+  .ppt-stage-label{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:11px 14px;color:#aeb4be;font-size:13px;border-bottom:1px solid #292d34}
+  .ppt-annotation-tools{display:flex;align-items:center;gap:5px;margin-left:auto}.ppt-annotation-tools .ppt-ui-btn{padding:6px 9px;font-size:12px}.ppt-annotation-tools .ppt-ui-btn.is-active{color:#111318;background:#ff5b63;border-color:#ff5b63}.ppt-annotation-tools .ppt-clear-btn{min-width:0}
+  .ppt-frame-viewport{position:relative;display:grid;place-items:center;min-width:0;min-height:0;overflow:hidden;background:#08090b}
   .ppt-frame{display:block;width:0;height:0;max-width:100%;max-height:100%;aspect-ratio:16/9;border:0;background:#08090b}.ppt-next-frame{opacity:.86}
+  .ppt-annotation-layer{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);z-index:4;width:0;height:0;pointer-events:none;touch-action:none}.ppt-annotation-layer.is-active{pointer-events:auto;cursor:crosshair}
+  #ppt-audience-ink{position:fixed;inset:0;z-index:70;width:100vw;height:100vh;pointer-events:none}#ppt-audience-cover{position:fixed;inset:0;z-index:80;display:none;pointer-events:none}
   .ppt-notes-card{display:grid;grid-template-rows:auto 1fr;min-height:0}.ppt-notes-head{padding:16px 18px;border-bottom:1px solid #292d34}.ppt-notes-title{font-size:20px;font-weight:650;margin-bottom:7px}.ppt-notes-sub{display:flex;align-items:center;justify-content:space-between;gap:10px;color:#9fa6b1;font-size:13px}
   .ppt-notes-tools{display:flex;align-items:center;gap:6px}.ppt-note-editor{width:100%;height:100%;min-height:0;resize:none;border:0;outline:0;background:#171a20;color:#edf0f3;padding:18px;font:400 var(--ppt-note-size,17px)/1.72 Inter,"Noto Sans SC",sans-serif}
-  .ppt-saved{color:#72df99}.ppt-presenter-bottom{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:20px;padding:16px 24px;border-top:1px solid #2b2e35;background:#15181d}
-  .ppt-timer{display:flex;align-items:center;gap:9px}.ppt-clock{min-width:72px;font:600 24px/1 var(--mono,monospace);font-variant-numeric:tabular-nums}.ppt-controls{display:flex;align-items:center;gap:8px}.ppt-controls .ppt-ui-btn{min-width:72px}.ppt-controls .ppt-primary{background:#f2f4f6;color:#111318;border-color:#f2f4f6}.ppt-controls .ppt-primary:hover{background:#fff}.ppt-page-state{text-align:right;color:#aeb4be;font-size:14px}.ppt-page-state strong{display:block;color:#fff;font-size:18px;margin-bottom:3px}
+  .ppt-saved{color:#72df99}.ppt-presenter-bottom{display:grid;grid-template-columns:minmax(280px,1fr) auto minmax(260px,1fr);align-items:center;gap:20px;padding:14px 24px;border-top:1px solid #2b2e35;background:#15181d}
+  .ppt-timer{display:flex;align-items:center;gap:9px;min-width:0}.ppt-time-copy{min-width:142px}.ppt-clock{font:600 24px/1 var(--mono,monospace);font-variant-numeric:tabular-nums}.ppt-time-detail{margin-top:5px;color:#9fa6b1;font-size:12px;white-space:nowrap}.ppt-time-detail.is-over{color:#ff8a90}.ppt-rehearsal-on{color:#ff8a90}.ppt-controls{display:flex;align-items:center;gap:8px}.ppt-controls .ppt-ui-btn{min-width:72px}.ppt-controls .ppt-primary{background:#f2f4f6;color:#111318;border-color:#f2f4f6}.ppt-controls .ppt-primary:hover{background:#fff}.ppt-page-state{text-align:right;color:#aeb4be;font-size:14px}.ppt-page-state strong{display:block;color:#fff;font-size:18px;margin-bottom:3px}.ppt-auto-state{display:inline-flex;align-items:center;gap:6px;margin-top:7px}.ppt-auto-state.is-on{color:#72df99}.ppt-auto-state.is-paused{color:#f0c766}
+  #ppt-presenter[data-layout="slides"] .ppt-presenter-main{grid-template-columns:minmax(0,2.15fr) minmax(260px,.58fr)}#ppt-presenter[data-layout="notes"] .ppt-presenter-main{grid-template-columns:minmax(0,1.15fr) minmax(380px,1fr)}
+  .ppt-dialog{position:fixed;inset:0;z-index:130;display:grid;place-items:center;padding:24px;background:rgba(4,6,9,.72);backdrop-filter:blur(10px)}.ppt-dialog[hidden]{display:none}.ppt-dialog-panel{width:min(720px,calc(100vw - 48px));max-height:min(760px,calc(100vh - 48px));display:grid;grid-template-rows:auto minmax(0,1fr);overflow:hidden;border:1px solid #343943;border-radius:14px;background:#171a20;box-shadow:0 24px 80px rgba(0,0,0,.45)}.ppt-dialog-head{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:16px 18px;border-bottom:1px solid #2b2f37}.ppt-dialog-title{font-size:20px;font-weight:700}.ppt-dialog-body{overflow:auto;padding:18px;color:#d8dce2;font-size:14px;line-height:1.6}.ppt-dialog-section+.ppt-dialog-section{margin-top:22px}.ppt-dialog-section h3{margin:0 0 10px;color:#fff;font-size:15px}.ppt-dialog-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}.ppt-dialog-row{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:10px 0;border-bottom:1px solid #282c33}.ppt-dialog-row:last-child{border-bottom:0}.ppt-field{display:grid;gap:6px}.ppt-field label{color:#aeb4be;font-size:12px}.ppt-field input{width:100%;border:1px solid #3a3e48;border-radius:8px;background:#101216;color:#fff;padding:9px 10px;font:600 14px Inter,sans-serif}.ppt-check{display:flex;align-items:flex-start;gap:10px}.ppt-check-dot{width:9px;height:9px;margin-top:7px;border-radius:50%;background:#ff6b72}.ppt-check.is-ok .ppt-check-dot{background:#72df99}.ppt-check.is-warn .ppt-check-dot{background:#f0c766}.ppt-summary{width:100%;border-collapse:collapse;font-size:13px}.ppt-summary th,.ppt-summary td{padding:9px 8px;border-bottom:1px solid #2b2f37;text-align:left}.ppt-summary th{color:#9fa6b1;font-weight:600}.ppt-summary td:last-child,.ppt-summary th:last-child{text-align:right}.ppt-muted{color:#8f96a1}.ppt-shortcuts{display:grid;grid-template-columns:auto 1fr;gap:8px 14px}.ppt-shortcuts kbd{min-width:44px;padding:4px 7px;border:1px solid #3a3e48;border-radius:6px;background:#101216;color:#fff;text-align:center;font:600 12px var(--mono,monospace)}
   #overview{z-index:110!important}
   @media(max-width:1200px){.ppt-presenter-main{grid-template-columns:minmax(0,1.55fr) minmax(280px,.72fr)}}
-  @media(max-width:900px){.ppt-presenter-top{padding:12px 16px}.ppt-presenter-main{grid-template-columns:minmax(0,1.45fr) minmax(250px,.72fr);gap:12px;padding:12px 16px}.ppt-preview-stack{gap:12px;grid-template-rows:minmax(0,1fr) clamp(104px,20vh,150px)}.ppt-presenter-bottom{gap:8px;padding:12px 16px}.ppt-controls{gap:5px}.ppt-controls .ppt-ui-btn{min-width:58px;padding:8px 10px}.ppt-page-state{display:none}}
+  @media(max-width:900px){.ppt-presenter-top{padding:12px 16px;flex-wrap:wrap}.ppt-presenter-top .ppt-presenter-meta{gap:6px}.ppt-presenter-top .ppt-ui-btn{padding:8px 9px}.ppt-presenter-main,#ppt-presenter[data-layout="slides"] .ppt-presenter-main,#ppt-presenter[data-layout="notes"] .ppt-presenter-main{grid-template-columns:minmax(0,1.45fr) minmax(250px,.72fr);gap:12px;padding:12px 16px}.ppt-preview-stack{gap:12px;grid-template-rows:minmax(0,1fr) clamp(104px,20vh,150px)}.ppt-presenter-bottom{grid-template-columns:1fr auto;gap:8px;padding:10px 16px}.ppt-time-copy{min-width:112px}.ppt-time-detail{white-space:normal}.ppt-timer .ppt-ui-btn:nth-of-type(2){display:none}.ppt-controls{gap:5px}.ppt-controls .ppt-ui-btn{min-width:58px;padding:8px 10px}.ppt-page-state{display:none}.ppt-dialog-grid{grid-template-columns:1fr}}
   @media(max-height:700px){.ppt-presenter-top{padding-top:11px;padding-bottom:11px}.ppt-presenter-main{padding-top:12px;padding-bottom:12px}.ppt-preview-stack{grid-template-rows:minmax(0,1fr) clamp(96px,18vh,126px);gap:12px}.ppt-stage-label{padding:8px 11px}.ppt-notes-head{padding:12px 14px}.ppt-presenter-bottom{padding-top:10px;padding-bottom:10px}}
 
   /* ============================================================
@@ -534,10 +539,12 @@
 <script>
 const SPEAKER_NOTES = [
   /* {
-    id: 'stable-slide-id', title: '页面标题', minutes: 1,
+    id: 'stable-slide-id', title: '页面标题', section: '主体', minutes: 1,
     purpose: '这一页要让观众理解什么',
     talk: ['只在台上说的补充信息', '例子、证据或语气提示', '不复述页面可见文字'],
-    transition: '为什么下一页紧接着出现', cue: '可选：停顿 / Demo / 视频'
+    transition: '为什么下一页紧接着出现', cue: '可选：停顿 / Demo / 视频',
+    interaction: '可选：现场提问', delivery: '可选：语气 / 重音',
+    advance: '可选：翻页时机', fallback: '可选：Demo 失败时的备用说法'
   } */
 ];
 window.__SPEAKER_NOTES__ = SPEAKER_NOTES;
@@ -749,51 +756,169 @@ window.__pptPresenter=(()=>{
   const originalTitle=document.title;
   const notes=()=>Array.isArray(window.__SPEAKER_NOTES__)?window.__SPEAKER_NOTES__:[];
   const slideId=i=>slides[i]?.dataset.slideId||`slide-${String(i+1).padStart(2,'0')}`;
+  const storageKey=name=>`guizang-ppt-${name}:${location.pathname}`;
   let mode='deck',session=query.get('session')||Math.random().toString(36).slice(2),audienceWindow=null;
-  let channel=null,transportReady=false,popupBlocked=false,audienceOpenedAt=0,lastAckAt=0,lastAckIndex=-1,lastAckSeq=-1,seq=0;
+  let channel=null,transportReady=false,popupBlocked=false,audienceOpenedAt=0,lastAckAt=0,lastAckIndex=-1,lastAckSeq=-1,seq=0,lastPingAt=0;
   let renderedNoteId='',saveTimer=0,noteSize=Number(localStorage.getItem('guizang-ppt-note-size')||17),presenterFrameObserver=null;
-  let elapsed=0,timerRunning=false,timerStartedAt=0,lowPowerBeforePresenter=window.__lowPowerMode;
+  let elapsed=0,timerRunning=false,timerStartedAt=0,timedSlideIndex=idx,slideTimerStartedAt=0,slideElapsed=Array(total).fill(0);
+  let rehearsalActive=false,lowPowerBeforePresenter=window.__lowPowerMode;
+  let layoutMode=localStorage.getItem(storageKey('layout'))||'balanced';
+  let autoEnabled=localStorage.getItem(storageKey('auto-enabled'))==='1';
+  let autoGlobalSeconds=Math.max(0,Number(localStorage.getItem(storageKey('auto-seconds'))||0));
+  let autoDeadline=0,autoRemainingMs=0;
+  let screenMode='normal',audienceFrozen=false;
+  let annotationTool='none',annotationPointerDown=false,annotationStart=null,draftCircle=null,circles=[],audienceCircles=[];
+  let laserPoint=null,audienceLaser=null,laserHideAt=0,audienceLaserHideAt=0,lastLaserSent=0;
+  const seenNonces=[],seenNonceSet=new Set();
   const syncKey=()=>`guizang-ppt-sync:${location.pathname}:${session}`;
   const channelName=()=>`guizang-ppt:${location.pathname}:${session}`;
 
   function noteAt(i){
     const id=slideId(i);
-    return notes().find(n=>n.id===id)||{id,title:slides[i]?.dataset.title||`第 ${i+1} 页`,minutes:0,purpose:'待补充本页目的',talk:['待补充讲述要点'],transition:'待补充转场'};
+    return notes().find(n=>n.id===id)||{id,title:slides[i]?.dataset.title||`第 ${i+1} 页`,purpose:'待补充本页目的',talk:['待补充讲述要点'],transition:'待补充转场'};
   }
   function slideLabel(i){return `${i+1} / ${total} · ${noteAt(i).title||slideId(i)}`;}
+  function escapeHTML(value){return String(value??'').replace(/[&<>"']/g,ch=>({'&':'&amp;','<':'&lt;','>':'&gt;','"':'&quot;',"'":'&#39;'}[ch]));}
+  function valueLines(value){
+    if(Array.isArray(value))return value.filter(Boolean).map(x=>`• ${x}`).join('\n');
+    return value?String(value):'';
+  }
   function generatedNote(n){
-    const talk=(n.talk||[]).map(x=>`• ${x}`).join('\n');
-    return `【本页目的】\n${n.purpose||''}\n\n【讲述要点】\n${talk}\n\n【转场】\n${n.transition||''}${n.cue?`\n\n【舞台提示】\n${n.cue}`:''}`;
+    const parts=[];
+    if(n.purpose)parts.push(`【本页目的】\n${n.purpose}`);
+    if(Array.isArray(n.talk)&&n.talk.length)parts.push(`【讲述要点】\n${valueLines(n.talk)}`);
+    if(n.transition)parts.push(`【转场】\n${n.transition}`);
+    const optional=[['舞台提示',n.cue],['互动',n.interaction],['表达提示',n.delivery],['翻页时机',n.advance],['备用方案',n.fallback],['读音提醒',n.pronunciation]];
+    optional.forEach(([label,value])=>{const text=valueLines(value);if(text)parts.push(`【${label}】\n${text}`);});
+    return parts.join('\n\n');
   }
   function noteStorageKey(id){return `guizang-ppt-note:${location.pathname}:${id}`;}
+  function loadNoteValue(id,i,n){
+    const saved=localStorage.getItem(noteStorageKey(id));
+    if(saved!==null)return saved;
+    const prefix=window.__PPT_LEGACY_NOTE_KEY__;
+    if(prefix){
+      const legacy=localStorage.getItem(`${prefix}:${i}`);
+      if(legacy!==null){localStorage.setItem(noteStorageKey(id),legacy);return legacy;}
+    }
+    return generatedNote(n);
+  }
   function frameUrl(targetMode,i){
     const url=new URL(location.href);url.hash='';
     url.searchParams.set('mode',targetMode);url.searchParams.set('session',session);url.searchParams.set('slide',String(i+1));
     return url.href;
   }
+  function plannedMsAt(i){
+    const minutes=Number(noteAt(i).minutes);
+    return Number.isFinite(minutes)&&minutes>0?minutes*60000:null;
+  }
+  function totalPlannedMs(){
+    const values=Array.from({length:total},(_,i)=>plannedMsAt(i));
+    return values.length&&values.every(Number.isFinite)?values.reduce((sum,x)=>sum+x,0):null;
+  }
+  function sectionInfo(i){
+    const name=String(noteAt(i).section||'').trim();
+    if(!name)return null;
+    let first=i,last=i;
+    while(first>0&&String(noteAt(first-1).section||'').trim()===name)first--;
+    while(last<total-1&&String(noteAt(last+1).section||'').trim()===name)last++;
+    const targets=[];for(let x=first;x<=last;x++)targets.push(plannedMsAt(x));
+    const planned=targets.every(Number.isFinite)?targets.reduce((sum,x)=>sum+x,0):null;
+    const used=slideElapsed.slice(first,last+1).reduce((sum,x)=>sum+x,0)+(timerRunning&&timedSlideIndex>=first&&timedSlideIndex<=last?Date.now()-slideTimerStartedAt:0);
+    return{name,position:i-first+1,count:last-first+1,planned,used};
+  }
+  function durationText(ms){
+    const value=Math.max(0,Math.round(Number(ms)||0)),seconds=Math.floor(value/1000);
+    const hours=Math.floor(seconds/3600),minutes=Math.floor((seconds%3600)/60),secs=seconds%60;
+    return hours?`${String(hours).padStart(2,'0')}:${String(minutes).padStart(2,'0')}:${String(secs).padStart(2,'0')}`:`${String(minutes).padStart(2,'0')}:${String(secs).padStart(2,'0')}`;
+  }
+  function signedDuration(ms){return `${ms>=0?'+':'−'}${durationText(Math.abs(ms))}`;}
+  function clockTime(timestamp){return new Date(timestamp).toLocaleTimeString([],{hour:'2-digit',minute:'2-digit'});}
+
   function fitFrame(frame){
     const viewport=frame?.closest('.ppt-frame-viewport');
     if(!viewport)return;
     const availableWidth=viewport.clientWidth,availableHeight=viewport.clientHeight;
     if(!availableWidth||!availableHeight)return;
-    const width=Math.min(availableWidth,availableHeight*(16/9));
-    frame.style.width=`${width}px`;
-    frame.style.height=`${width*(9/16)}px`;
+    const width=Math.min(availableWidth,availableHeight*(16/9)),height=width*(9/16);
+    frame.style.width=`${width}px`;frame.style.height=`${height}px`;
+    if(frame.id==='ppt-current-frame')sizeInk(document.getElementById('ppt-presenter-ink'),width,height);
   }
   function fitPresenterFrames(){
     fitFrame(document.getElementById('ppt-current-frame'));
     fitFrame(document.getElementById('ppt-next-frame'));
   }
+  function sizeInk(canvas,width,height){
+    if(!canvas||!width||!height)return;
+    canvas.style.width=`${width}px`;canvas.style.height=`${height}px`;
+    const dpr=Math.min(devicePixelRatio||1,2),pixelWidth=Math.round(width*dpr),pixelHeight=Math.round(height*dpr);
+    if(canvas.width!==pixelWidth||canvas.height!==pixelHeight){canvas.width=pixelWidth;canvas.height=pixelHeight;}
+  }
+  function drawEllipse(ctx,circle,width,height,alpha=1){
+    const x1=circle.x1*width,y1=circle.y1*height,x2=circle.x2*width,y2=circle.y2*height;
+    ctx.save();ctx.globalAlpha=alpha;ctx.strokeStyle='#ff4f59';ctx.lineWidth=Math.max(3,width*.004);ctx.lineCap='round';
+    ctx.beginPath();ctx.ellipse((x1+x2)/2,(y1+y2)/2,Math.abs(x2-x1)/2,Math.abs(y2-y1)/2,0,0,Math.PI*2);ctx.stroke();ctx.restore();
+  }
+  function drawInk(canvas,list,laser,draft){
+    if(!canvas)return;const width=canvas.clientWidth,height=canvas.clientHeight;if(!width||!height)return;
+    sizeInk(canvas,width,height);const dpr=canvas.width/width,ctx=canvas.getContext('2d');ctx.setTransform(dpr,0,0,dpr,0,0);ctx.clearRect(0,0,width,height);
+    (list||[]).forEach(circle=>drawEllipse(ctx,circle,width,height));
+    if(draft)drawEllipse(ctx,draft,width,height,.72);
+    if(laser){
+      const x=laser.x*width,y=laser.y*height,r=Math.max(6,width*.007);
+      const glow=ctx.createRadialGradient(x,y,0,x,y,r*2.8);glow.addColorStop(0,'rgba(255,255,255,.98)');glow.addColorStop(.2,'rgba(255,64,72,.98)');glow.addColorStop(1,'rgba(255,64,72,0)');
+      ctx.fillStyle=glow;ctx.beginPath();ctx.arc(x,y,r*2.8,0,Math.PI*2);ctx.fill();
+    }
+  }
+  function renderInks(){
+    const now=Date.now();if(now>laserHideAt)laserPoint=null;if(now>audienceLaserHideAt)audienceLaser=null;
+    drawInk(document.getElementById('ppt-presenter-ink'),circles,laserPoint,draftCircle);
+    drawInk(document.getElementById('ppt-audience-ink'),audienceCircles,audienceLaser,null);
+  }
+  function setAnnotationTool(tool){
+    annotationTool=annotationTool===tool?'none':tool;annotationPointerDown=false;draftCircle=null;
+    const canvas=document.getElementById('ppt-presenter-ink');canvas?.classList.toggle('is-active',annotationTool!=='none');
+    document.querySelectorAll('[data-ppt-tool]').forEach(button=>button.classList.toggle('is-active',button.dataset.pptTool===annotationTool));
+    renderInks();
+  }
+  function annotationPoint(event){
+    const canvas=event.currentTarget,rect=canvas.getBoundingClientRect();
+    return{x:Math.max(0,Math.min(1,(event.clientX-rect.left)/rect.width)),y:Math.max(0,Math.min(1,(event.clientY-rect.top)/rect.height))};
+  }
+  function onAnnotationPointerDown(event){
+    if(annotationTool!=='circle')return;event.preventDefault();annotationPointerDown=true;annotationStart=annotationPoint(event);draftCircle={x1:annotationStart.x,y1:annotationStart.y,x2:annotationStart.x,y2:annotationStart.y};event.currentTarget.setPointerCapture?.(event.pointerId);renderInks();
+  }
+  function onAnnotationPointerMove(event){
+    if(annotationTool==='laser'){
+      const point=annotationPoint(event);laserPoint=point;laserHideAt=Date.now()+650;
+      if(Date.now()-lastLaserSent>32){lastLaserSent=Date.now();emit({type:'laser',index:idx,point},{persist:false});}renderInks();return;
+    }
+    if(annotationTool==='circle'&&annotationPointerDown&&draftCircle){const point=annotationPoint(event);draftCircle.x2=point.x;draftCircle.y2=point.y;renderInks();}
+  }
+  function onAnnotationPointerUp(event){
+    if(annotationTool!=='circle'||!annotationPointerDown||!draftCircle)return;event.preventDefault();annotationPointerDown=false;
+    const circle={...draftCircle};draftCircle=null;
+    if(Math.abs(circle.x2-circle.x1)>.012&&Math.abs(circle.y2-circle.y1)>.012){circles.push(circle);emit({type:'circle',index:idx,circle});}
+    renderInks();
+  }
+  function onAnnotationPointerLeave(){
+    if(annotationTool==='laser'){laserPoint=null;emit({type:'laser',index:idx,point:null},{persist:false});renderInks();}
+  }
+  function clearAnnotations(broadcast=true){circles=[];draftCircle=null;laserPoint=null;if(broadcast)emit({type:'clear',index:idx});renderInks();}
+
   function mountShell(){
     if(document.getElementById('ppt-presenter'))return;
-    document.body.insertAdjacentHTML('beforeend',`<div id="ppt-presenter" aria-label="演讲者视图">
-      <div class="ppt-presenter-top"><div><div class="ppt-presenter-brand">演讲者视图</div><div class="ppt-presenter-meta"><span id="ppt-plan"></span></div></div><div class="ppt-presenter-meta"><span id="ppt-sync" class="ppt-sync" data-state="disconnected" title="表示观众页面的软件同步状态，不代表 HDMI 等物理线缆状态">观众屏 · 未连接</span><button id="ppt-reopen" class="ppt-ui-btn" type="button">重新打开观众屏</button><button id="ppt-exit" class="ppt-ui-btn" type="button">退出</button></div></div>
-      <div class="ppt-presenter-main"><div class="ppt-preview-stack"><div class="ppt-stage-card"><div class="ppt-stage-label"><span>当前页</span><span id="ppt-current-label"></span></div><div class="ppt-frame-viewport"><iframe id="ppt-current-frame" class="ppt-frame" title="当前页预览"></iframe></div></div><div class="ppt-stage-card" id="ppt-next-card"><div class="ppt-stage-label"><span>下一页</span><span id="ppt-next-label"></span></div><div class="ppt-frame-viewport"><iframe id="ppt-next-frame" class="ppt-frame ppt-next-frame" title="下一页预览"></iframe></div></div></div>
+    document.body.insertAdjacentHTML('beforeend',`<div id="ppt-presenter" data-layout="${layoutMode}" aria-label="演讲者视图">
+      <div class="ppt-presenter-top"><div><div class="ppt-presenter-brand">演讲者视图</div><div class="ppt-presenter-meta"><span id="ppt-plan"></span><span id="ppt-section" hidden></span></div></div><div class="ppt-presenter-meta"><span id="ppt-sync" class="ppt-sync" data-state="disconnected" title="表示观众页面的软件同步状态，不代表 HDMI 等物理线缆状态">观众屏 · 未连接</span><button id="ppt-preflight" class="ppt-ui-btn" type="button">检查</button><button id="ppt-settings" class="ppt-ui-btn" type="button">设置</button><button id="ppt-reopen" class="ppt-ui-btn" type="button">重新打开观众屏</button><button id="ppt-exit" class="ppt-ui-btn" type="button">退出</button></div></div>
+      <div class="ppt-presenter-main"><div class="ppt-preview-stack"><div class="ppt-stage-card"><div class="ppt-stage-label"><span>当前页</span><span class="ppt-annotation-tools"><button class="ppt-ui-btn" data-ppt-tool="laser" type="button" title="激光笔（L）">激光</button><button class="ppt-ui-btn" data-ppt-tool="circle" type="button" title="圈选（C）">圈选</button><button id="ppt-ink-clear" class="ppt-ui-btn ppt-clear-btn" type="button" title="清除标记（X）">清除</button></span><span id="ppt-current-label"></span></div><div class="ppt-frame-viewport"><iframe id="ppt-current-frame" class="ppt-frame" title="当前页预览"></iframe><canvas id="ppt-presenter-ink" class="ppt-annotation-layer" aria-label="演讲标注层"></canvas></div></div><div class="ppt-stage-card" id="ppt-next-card"><div class="ppt-stage-label"><span>下一页</span><span id="ppt-next-label"></span></div><div class="ppt-frame-viewport"><iframe id="ppt-next-frame" class="ppt-frame ppt-next-frame" title="下一页预览"></iframe></div></div></div>
       <div class="ppt-notes-card"><div class="ppt-notes-head"><div id="ppt-notes-title" class="ppt-notes-title"></div><div class="ppt-notes-sub"><span id="ppt-note-meta"></span><span class="ppt-notes-tools"><span id="ppt-saved" class="ppt-saved">已保存</span><button id="ppt-note-smaller" class="ppt-ui-btn" type="button" title="缩小备注字号">A−</button><button id="ppt-note-larger" class="ppt-ui-btn" type="button" title="放大备注字号">A+</button></span></div></div><textarea id="ppt-note-editor" class="ppt-note-editor" spellcheck="false" aria-label="本页演讲备注"></textarea></div></div>
-      <div class="ppt-presenter-bottom"><div class="ppt-timer"><span id="ppt-clock" class="ppt-clock">00:00</span><button id="ppt-timer-toggle" class="ppt-ui-btn" type="button">开始计时</button><button id="ppt-timer-reset" class="ppt-ui-btn" type="button">重置</button></div><div class="ppt-controls"><button id="ppt-first" class="ppt-ui-btn" type="button">首页</button><button id="ppt-prev" class="ppt-ui-btn" type="button">上一页</button><button id="ppt-grid" class="ppt-ui-btn ppt-primary" type="button">总览</button><button id="ppt-next" class="ppt-ui-btn" type="button">下一页</button><button id="ppt-last" class="ppt-ui-btn" type="button">尾页</button></div><div class="ppt-page-state"><strong id="ppt-page-title"></strong><span id="ppt-page-count"></span></div></div>
+      <div class="ppt-presenter-bottom"><div class="ppt-timer"><div class="ppt-time-copy"><div id="ppt-clock" class="ppt-clock">00:00</div><div id="ppt-time-detail" class="ppt-time-detail">本页 00:00 / —</div></div><button id="ppt-timer-toggle" class="ppt-ui-btn" type="button">开始</button><button id="ppt-timer-reset" class="ppt-ui-btn" type="button">重置</button><button id="ppt-rehearsal" class="ppt-ui-btn" type="button">排练</button></div><div class="ppt-controls"><button id="ppt-first" class="ppt-ui-btn" type="button">首页</button><button id="ppt-prev" class="ppt-ui-btn" type="button">上一页</button><button id="ppt-grid" class="ppt-ui-btn ppt-primary" type="button">总览</button><button id="ppt-next" class="ppt-ui-btn" type="button">下一页</button><button id="ppt-last" class="ppt-ui-btn" type="button">尾页</button></div><div class="ppt-page-state"><strong id="ppt-page-title"></strong><span id="ppt-page-count"></span><br><button id="ppt-auto-toggle" class="ppt-ui-btn ppt-auto-state" type="button">自动翻页 · 关闭</button></div></div>
+      <div id="ppt-dialog" class="ppt-dialog" hidden><div class="ppt-dialog-panel" role="dialog" aria-modal="true"><div class="ppt-dialog-head"><div id="ppt-dialog-title" class="ppt-dialog-title"></div><button id="ppt-dialog-close" class="ppt-ui-btn" type="button">关闭</button></div><div id="ppt-dialog-body" class="ppt-dialog-body"></div></div></div>
     </div>`);
     document.getElementById('ppt-reopen').onclick=reopenAudience;
     document.getElementById('ppt-exit').onclick=exitPresenter;
+    document.getElementById('ppt-preflight').onclick=openPreflight;
+    document.getElementById('ppt-settings').onclick=openSettings;
     document.getElementById('ppt-first').onclick=()=>go(0,{force:true});
     document.getElementById('ppt-prev').onclick=()=>go(idx-1,{force:true});
     document.getElementById('ppt-grid').onclick=toggleOverview;
@@ -801,13 +926,20 @@ window.__pptPresenter=(()=>{
     document.getElementById('ppt-last').onclick=()=>go(idx===total-1?0:total-1,{force:true});
     document.getElementById('ppt-timer-toggle').onclick=toggleTimer;
     document.getElementById('ppt-timer-reset').onclick=resetTimer;
+    document.getElementById('ppt-rehearsal').onclick=toggleRehearsal;
+    document.getElementById('ppt-auto-toggle').onclick=toggleAutoAdvance;
     document.getElementById('ppt-note-smaller').onclick=()=>setNoteSize(noteSize-1);
     document.getElementById('ppt-note-larger').onclick=()=>setNoteSize(noteSize+1);
     document.getElementById('ppt-note-editor').addEventListener('input',saveNote);
+    document.querySelectorAll('[data-ppt-tool]').forEach(button=>button.onclick=()=>setAnnotationTool(button.dataset.pptTool));
+    document.getElementById('ppt-ink-clear').onclick=()=>clearAnnotations(true);
+    const ink=document.getElementById('ppt-presenter-ink');
+    ink.addEventListener('pointerdown',onAnnotationPointerDown);ink.addEventListener('pointermove',onAnnotationPointerMove);ink.addEventListener('pointerup',onAnnotationPointerUp);ink.addEventListener('pointercancel',onAnnotationPointerUp);ink.addEventListener('pointerleave',onAnnotationPointerLeave);
+    document.getElementById('ppt-dialog-close').onclick=closeDialog;
+    document.getElementById('ppt-dialog').onclick=event=>{if(event.target.id==='ppt-dialog')closeDialog();};
     if('ResizeObserver'in window){presenterFrameObserver=new ResizeObserver(()=>requestAnimationFrame(fitPresenterFrames));presenterFrameObserver.observe(document.querySelector('.ppt-preview-stack'));}
     else addEventListener('resize',fitPresenterFrames);
-    setNoteSize(noteSize,false);
-    requestAnimationFrame(fitPresenterFrames);
+    setNoteSize(noteSize,false);applyLayout(layoutMode,false);requestAnimationFrame(fitPresenterFrames);
   }
   function updateShell(){
     if(mode!=='presenter')return;mountShell();
@@ -818,28 +950,143 @@ window.__pptPresenter=(()=>{
     document.getElementById('ppt-current-label').textContent=`${idx+1} / ${total}`;
     document.getElementById('ppt-next-label').textContent=idx===total-1?'已到尾页':`${next+1} / ${total}`;
     document.getElementById('ppt-notes-title').textContent=n.title||`第 ${idx+1} 页`;
-    document.getElementById('ppt-note-meta').textContent=`建议 ${Number(n.minutes||0).toFixed(1)} 分钟 · ${id}`;
+    const target=plannedMsAt(idx);document.getElementById('ppt-note-meta').textContent=`建议 ${target?(target/60000).toFixed(1):'—'} 分钟 · ${id}`;
     document.getElementById('ppt-page-title').textContent=n.title||`第 ${idx+1} 页`;
     document.getElementById('ppt-page-count').textContent=`第 ${idx+1} / ${total} 页 · ${Math.round(((idx+1)/total)*100)}%`;
-    document.getElementById('ppt-plan').textContent=`计划 ${notes().reduce((s,x)=>s+Number(x.minutes||0),0).toFixed(1)} 分钟`;
     document.getElementById('ppt-first').disabled=idx===0;document.getElementById('ppt-prev').disabled=idx===0;document.getElementById('ppt-next').disabled=idx===total-1;
     document.getElementById('ppt-last').textContent=idx===total-1?'重新开始':'尾页';
-    if(renderedNoteId!==id){renderedNoteId=id;editor.value=localStorage.getItem(noteStorageKey(id))??generatedNote(n);editor.scrollTop=0;document.getElementById('ppt-saved').textContent='已保存';}
-    requestAnimationFrame(fitPresenterFrames);
-    updateSyncStatus();
+    if(renderedNoteId!==id){renderedNoteId=id;editor.value=loadNoteValue(id,idx,n);editor.scrollTop=0;document.getElementById('ppt-saved').textContent='已保存';}
+    requestAnimationFrame(fitPresenterFrames);renderTimer();updateSyncStatus();
   }
   function saveNote(){
     const saved=document.getElementById('ppt-saved');saved.textContent='保存中…';saved.classList.remove('ppt-saved');clearTimeout(saveTimer);
     saveTimer=setTimeout(()=>{localStorage.setItem(noteStorageKey(renderedNoteId),document.getElementById('ppt-note-editor').value);saved.textContent='已保存';saved.classList.add('ppt-saved');},300);
   }
-  function setNoteSize(value,persist=true){
-    noteSize=Math.max(14,Math.min(26,value));document.documentElement.style.setProperty('--ppt-note-size',`${noteSize}px`);
-    if(persist)localStorage.setItem('guizang-ppt-note-size',String(noteSize));
-  }
+  function setNoteSize(value,persist=true){noteSize=Math.max(14,Math.min(26,value));document.documentElement.style.setProperty('--ppt-note-size',`${noteSize}px`);if(persist)localStorage.setItem('guizang-ppt-note-size',String(noteSize));}
   function currentElapsed(){return elapsed+(timerRunning?Date.now()-timerStartedAt:0);}
-  function renderTimer(){const sec=Math.floor(currentElapsed()/1000),clock=document.getElementById('ppt-clock');if(clock)clock.textContent=`${String(Math.floor(sec/60)).padStart(2,'0')}:${String(sec%60).padStart(2,'0')}`;}
-  function toggleTimer(){if(timerRunning){elapsed=currentElapsed();timerRunning=false;}else{timerStartedAt=Date.now();timerRunning=true;}document.getElementById('ppt-timer-toggle').textContent=timerRunning?'暂停':'继续';renderTimer();}
-  function resetTimer(){elapsed=0;timerRunning=false;timerStartedAt=0;document.getElementById('ppt-timer-toggle').textContent='开始计时';renderTimer();}
+  function currentSlideElapsed(i=idx){return slideElapsed[i]+(timerRunning&&timedSlideIndex===i?Date.now()-slideTimerStartedAt:0);}
+  function commitRunningTime(now=Date.now()){
+    if(!timerRunning)return;elapsed+=now-timerStartedAt;slideElapsed[timedSlideIndex]+=now-slideTimerStartedAt;timerStartedAt=now;slideTimerStartedAt=now;
+  }
+  function rollSlideTimer(nextIndex){if(timerRunning)commitRunningTime();timedSlideIndex=nextIndex;slideTimerStartedAt=Date.now();}
+  function renderTimer(){
+    const totalUsed=currentElapsed(),pageUsed=currentSlideElapsed(),target=plannedMsAt(idx),clock=document.getElementById('ppt-clock');
+    if(clock)clock.textContent=durationText(totalUsed);
+    const detail=document.getElementById('ppt-time-detail');
+    if(detail){
+      detail.classList.toggle('is-over',Boolean(target&&pageUsed>target));
+      detail.textContent=target?(pageUsed<=target?`本页 ${durationText(pageUsed)} / ${durationText(target)} · 剩余 ${durationText(target-pageUsed)}`:`本页 ${durationText(pageUsed)} / ${durationText(target)} · 超时 ${durationText(pageUsed-target)}`):`本页 ${durationText(pageUsed)} / —`;
+    }
+    const totalPlan=totalPlannedMs(),plan=document.getElementById('ppt-plan');
+    if(plan)plan.textContent=totalPlan?`计划 ${Number(totalPlan/60000).toFixed(1)} 分钟 · 预计 ${clockTime(Date.now()+Math.max(0,totalPlan-totalUsed))}`:'计划 —';
+    const section=sectionInfo(idx),sectionEl=document.getElementById('ppt-section');
+    if(sectionEl){sectionEl.hidden=!section;sectionEl.textContent=section?`${section.name} · ${section.position}/${section.count}${section.planned?` · 剩余 ${durationText(Math.max(0,section.planned-section.used))}`:''}`:'';}
+    const timerButton=document.getElementById('ppt-timer-toggle');if(timerButton)timerButton.textContent=timerRunning?'暂停':(totalUsed?'继续':'开始');
+    const rehearsalButton=document.getElementById('ppt-rehearsal');if(rehearsalButton){rehearsalButton.textContent=rehearsalActive?'结束排练':'排练';rehearsalButton.classList.toggle('ppt-rehearsal-on',rehearsalActive);}
+    renderAutoState();
+  }
+  function toggleTimer(){const now=Date.now();if(timerRunning){commitRunningTime(now);timerRunning=false;}else{timerStartedAt=now;slideTimerStartedAt=now;timedSlideIndex=idx;timerRunning=true;}renderTimer();}
+  function resetTimer(){
+    elapsed=0;slideElapsed=Array(total).fill(0);timedSlideIndex=idx;
+    if(timerRunning){timerStartedAt=Date.now();slideTimerStartedAt=timerStartedAt;}else{timerStartedAt=0;slideTimerStartedAt=0;}
+    renderTimer();
+  }
+  function rehearsalHistory(){try{return JSON.parse(localStorage.getItem(storageKey('rehearsals'))||'[]');}catch(e){return[];}}
+  function toggleRehearsal(){
+    if(rehearsalActive){finishRehearsal(true);return;}
+    rehearsalActive=true;if(timerRunning){commitRunningTime();timerRunning=false;}resetTimer();toggleTimer();renderTimer();
+  }
+  function finishRehearsal(showSummary){
+    if(!rehearsalActive)return;if(timerRunning){commitRunningTime();timerRunning=false;}
+    const result={endedAt:Date.now(),totalMs:elapsed,slides:slideElapsed.map((ms,i)=>({index:i,id:slideId(i),title:noteAt(i).title||slideId(i),ms,targetMs:plannedMsAt(i)}))};
+    const history=rehearsalHistory();history.unshift(result);try{localStorage.setItem(storageKey('rehearsals'),JSON.stringify(history.slice(0,5)));}catch(e){}
+    rehearsalActive=false;renderTimer();if(showSummary)openRehearsalSummary(result,history.slice(0,5));
+  }
+  function openRehearsalSummary(result,history){
+    const rows=result.slides.filter(item=>item.ms>0).map(item=>`<tr><td>${item.index+1}</td><td>${escapeHTML(item.title)}</td><td>${durationText(item.ms)}</td><td>${item.targetMs?signedDuration(item.ms-item.targetMs):'—'}</td></tr>`).join('');
+    const recent=history.map(item=>`<div class="ppt-dialog-row"><span>${new Date(item.endedAt).toLocaleString()}</span><strong>${durationText(item.totalMs)}</strong></div>`).join('');
+    openDialog('排练记录',`<div class="ppt-dialog-section"><div class="ppt-dialog-row"><span>本次总时长</span><strong>${durationText(result.totalMs)}</strong></div><table class="ppt-summary"><thead><tr><th>#</th><th>页面</th><th>实际</th><th>与计划相比</th></tr></thead><tbody>${rows||'<tr><td colspan="4">没有记录到页面时间</td></tr>'}</tbody></table></div><div class="ppt-dialog-section"><h3>最近排练</h3>${recent}</div>`);
+  }
+
+  function autoDurationMs(i=idx){const explicit=Number(noteAt(i).autoAdvanceSeconds);const seconds=Number.isFinite(explicit)&&explicit>0?explicit:autoGlobalSeconds;return seconds>0?seconds*1000:null;}
+  function armAutoAdvance(){autoDeadline=0;autoRemainingMs=autoDurationMs()||0;}
+  function autoBlockedReason(){
+    if(overviewOn)return'总览中';if(annotationTool!=='none')return'标注中';if(screenMode!=='normal')return'观众屏已暂停';if(document.hidden)return'窗口不可见';
+    const dialog=document.getElementById('ppt-dialog');if(dialog&&!dialog.hidden)return'设置中';
+    if(audienceOpenedAt&&syncState()!=='synced')return'等待观众屏同步';return'';
+  }
+  function updateAutoAdvance(){
+    if(!autoEnabled)return;
+    const duration=autoDurationMs();if(!duration||idx===total-1)return;
+    const blocked=autoBlockedReason(),now=Date.now();
+    if(blocked){if(autoDeadline){autoRemainingMs=Math.max(0,autoDeadline-now);autoDeadline=0;}return;}
+    if(!autoDeadline)autoDeadline=now+(autoRemainingMs||duration);
+    autoRemainingMs=Math.max(0,autoDeadline-now);
+    if(now>=autoDeadline){autoDeadline=0;autoRemainingMs=0;go(idx+1,{force:true});}
+  }
+  function renderAutoState(){
+    const button=document.getElementById('ppt-auto-toggle');if(!button)return;
+    const duration=autoDurationMs(),blocked=autoEnabled?autoBlockedReason():'';
+    button.classList.toggle('is-on',autoEnabled&&!blocked);button.classList.toggle('is-paused',autoEnabled&&Boolean(blocked));
+    if(!autoEnabled)button.textContent='自动翻页 · 关闭';
+    else if(!duration)button.textContent='自动翻页 · 等待时长';
+    else if(idx===total-1)button.textContent='自动翻页 · 已结束';
+    else if(blocked)button.textContent=`自动翻页 · ${blocked}`;
+    else button.textContent=`自动翻页 · ${durationText(autoRemainingMs||duration)}`;
+  }
+  function toggleAutoAdvance(){
+    if(!autoEnabled&&!autoDurationMs()){openSettings();return;}
+    autoEnabled=!autoEnabled;localStorage.setItem(storageKey('auto-enabled'),autoEnabled?'1':'0');armAutoAdvance();renderAutoState();
+  }
+
+  function openDialog(title,html){
+    const dialog=document.getElementById('ppt-dialog');if(!dialog)return;
+    document.getElementById('ppt-dialog-title').textContent=title;document.getElementById('ppt-dialog-body').innerHTML=html;dialog.hidden=false;renderAutoState();
+  }
+  function closeDialog(){const dialog=document.getElementById('ppt-dialog');if(dialog)dialog.hidden=true;renderAutoState();}
+  function applyLayout(value,persist=true){
+    layoutMode=['balanced','slides','notes'].includes(value)?value:'balanced';
+    document.getElementById('ppt-presenter')?.setAttribute('data-layout',layoutMode);
+    if(persist)localStorage.setItem(storageKey('layout'),layoutMode);requestAnimationFrame(fitPresenterFrames);
+  }
+  function applyAudienceScreen(value){
+    const cover=document.getElementById('ppt-audience-cover');if(!cover)return;
+    if(value==='black'||value==='white'){cover.style.display='block';cover.style.background=value;}else cover.style.display='none';
+  }
+  function setScreenMode(value){
+    const next=['normal','black','white','frozen'].includes(value)?value:'normal',wasFrozen=audienceFrozen;
+    screenMode=next;audienceFrozen=next==='frozen';emit({type:'screen',mode:next});
+    if(wasFrozen&&!audienceFrozen)sendGoto(true);updateSyncStatus();armAutoAdvance();renderAutoState();
+  }
+  function openSettings(){
+    openDialog('演示设置',`<div class="ppt-dialog-section"><h3>自动翻页</h3><div class="ppt-dialog-grid"><label class="ppt-dialog-row"><span>启用</span><input id="ppt-auto-enabled-setting" type="checkbox" ${autoEnabled?'checked':''}></label><div class="ppt-field"><label for="ppt-auto-seconds-setting">全局间隔（秒）</label><input id="ppt-auto-seconds-setting" type="number" min="1" step="1" value="${autoGlobalSeconds||''}" placeholder="未设置"></div><button id="ppt-settings-save" class="ppt-ui-btn" type="button">保存自动翻页</button></div><p class="ppt-muted">页面里的 autoAdvanceSeconds 优先于全局间隔；建议讲述时间 minutes 不会自动触发翻页。</p></div><div class="ppt-dialog-section"><h3>演讲者布局</h3><div class="ppt-dialog-grid"><button class="ppt-ui-btn" data-layout-choice="balanced" type="button">均衡</button><button class="ppt-ui-btn" data-layout-choice="slides" type="button">页面优先</button><button class="ppt-ui-btn" data-layout-choice="notes" type="button">备注优先</button></div></div><div class="ppt-dialog-section"><h3>观众屏</h3><div class="ppt-dialog-grid"><button class="ppt-ui-btn" data-screen-choice="normal" type="button">正常显示</button><button class="ppt-ui-btn" data-screen-choice="black" type="button">黑屏 B</button><button class="ppt-ui-btn" data-screen-choice="white" type="button">白屏 W</button><button class="ppt-ui-btn" data-screen-choice="frozen" type="button">冻结 F</button></div></div><div class="ppt-dialog-section"><button id="ppt-open-shortcuts" class="ppt-ui-btn" type="button">查看快捷键</button></div>`);
+    document.querySelectorAll('[data-layout-choice]').forEach(button=>{button.classList.toggle('ppt-primary',button.dataset.layoutChoice===layoutMode);button.onclick=()=>{applyLayout(button.dataset.layoutChoice);openSettings();};});
+    document.querySelectorAll('[data-screen-choice]').forEach(button=>{button.classList.toggle('ppt-primary',button.dataset.screenChoice===screenMode);button.onclick=()=>{setScreenMode(button.dataset.screenChoice);openSettings();};});
+    document.getElementById('ppt-settings-save').onclick=()=>{autoEnabled=document.getElementById('ppt-auto-enabled-setting').checked;autoGlobalSeconds=Math.max(0,Number(document.getElementById('ppt-auto-seconds-setting').value||0));localStorage.setItem(storageKey('auto-enabled'),autoEnabled?'1':'0');localStorage.setItem(storageKey('auto-seconds'),String(autoGlobalSeconds));armAutoAdvance();closeDialog();};
+    document.getElementById('ppt-open-shortcuts').onclick=openShortcuts;
+  }
+  function openShortcuts(){
+    const items=[['← / →','上一页 / 下一页'],['Home / End','首页 / 尾页'],['Esc','总览；标注工具激活时先退出工具'],['L','激光笔'],['C','圈选'],['X','清除标记'],['B / W','观众屏黑屏 / 白屏'],['F','冻结 / 恢复观众屏'],['A','开启 / 关闭自动翻页'],['R','开始 / 结束排练'],['?','快捷键说明']];
+    openDialog('快捷键',`<div class="ppt-shortcuts">${items.map(([key,label])=>`<kbd>${key}</kbd><span>${label}</span>`).join('')}</div>`);
+  }
+  function preflightChecks(){
+    const images=[...document.images],videos=[...document.querySelectorAll('video')],frame=document.getElementById('ppt-current-frame'),rect=frame?.getBoundingClientRect();
+    return[
+      {label:'观众屏连接',ok:['synced','frozen'].includes(syncState()),detail:`当前状态：${document.getElementById('ppt-sync')?.textContent||'未连接'}`},
+      {label:'弹窗权限',ok:!popupBlocked,detail:popupBlocked?'浏览器阻止了观众窗口':'未检测到弹窗拦截'},
+      {label:'全屏状态',ok:Boolean(document.fullscreenElement),warn:true,detail:document.fullscreenElement?'已进入全屏':'尚未全屏，可在演讲前进入'},
+      {label:'字体加载',ok:!document.fonts||document.fonts.status==='loaded',detail:document.fonts?`状态：${document.fonts.status}`:'浏览器不提供字体状态'},
+      {label:'图片资源',ok:images.every(image=>image.complete&&image.naturalWidth>0),detail:`${images.filter(image=>image.complete&&image.naturalWidth>0).length} / ${images.length} 已加载`},
+      {label:'视频资源',ok:videos.every(video=>video.readyState>=2),detail:videos.length?`${videos.filter(video=>video.readyState>=2).length} / ${videos.length} 可播放`:'没有视频'},
+      {label:'当前页 16:9',ok:Boolean(rect&&Math.abs(rect.width/rect.height-16/9)<.003),detail:rect?`${Math.round(rect.width)} × ${Math.round(rect.height)}`:'尚未渲染'}
+    ];
+  }
+  function openPreflight(){
+    const checks=preflightChecks(),html=checks.map(item=>`<div class="ppt-dialog-row"><div class="ppt-check ${item.ok?'is-ok':(item.warn?'is-warn':'')}"><span class="ppt-check-dot"></span><span><strong>${item.label}</strong><br><span class="ppt-muted">${item.detail}</span></span></div><strong>${item.ok?'正常':(item.warn?'建议':'异常')}</strong></div>`).join('');
+    openDialog('演前检查',`<div class="ppt-dialog-section">${html}</div><div class="ppt-dialog-section"><button id="ppt-preflight-refresh" class="ppt-ui-btn" type="button">重新检查</button> <button id="ppt-enter-fullscreen" class="ppt-ui-btn" type="button">进入全屏</button></div><p class="ppt-muted">这里只能检查浏览器和观众页面的软件状态，不能确认 HDMI、转接器或投影仪线缆是否物理连接。</p>`);
+    document.getElementById('ppt-preflight-refresh').onclick=openPreflight;
+    document.getElementById('ppt-enter-fullscreen').onclick=async()=>{try{await document.documentElement.requestFullscreen();}catch(e){}openPreflight();};
+  }
 
   function initTransport(){
     if(transportReady)return;transportReady=true;
@@ -847,62 +1094,89 @@ window.__pptPresenter=(()=>{
     addEventListener('message',e=>receive(e.data));
     addEventListener('storage',e=>{if(e.key===syncKey()&&e.newValue){try{receive(JSON.parse(e.newValue));}catch(err){}}});
   }
-  function emit(payload){
+  function emit(payload,{persist=true}={}){
     const message={__guizangPptSync:1,session,role:mode,...payload,at:Date.now(),nonce:Math.random().toString(36).slice(2)};
     try{channel?.postMessage(message);}catch(e){}
-    try{localStorage.setItem(syncKey(),JSON.stringify(message));}catch(e){}
+    if(persist)try{localStorage.setItem(syncKey(),JSON.stringify(message));}catch(e){}
     try{if(mode==='presenter'&&audienceWindow&&!audienceWindow.closed)audienceWindow.postMessage(message,'*');}catch(e){}
     try{if(mode==='audience'&&window.opener&&!window.opener.closed)window.opener.postMessage(message,'*');}catch(e){}
   }
   function receive(message){
     if(!message||message.__guizangPptSync!==1||message.session!==session||message.role===mode)return;
+    if(message.nonce){if(seenNonceSet.has(message.nonce))return;seenNonceSet.add(message.nonce);seenNonces.push(message.nonce);if(seenNonces.length>256)seenNonceSet.delete(seenNonces.shift());}
     if(mode==='presenter'){
       if(message.type==='ready'){popupBlocked=false;sendGoto(true);}
       if(message.type==='ack'){lastAckAt=Date.now();lastAckIndex=Number(message.index);lastAckSeq=Number(message.seq);updateSyncStatus();}
       return;
     }
-    if(mode==='audience'&&(message.type==='goto'||message.type==='ping')){
-      if(message.type==='goto')go(Number(message.index),{force:true});
+    if(mode!=='audience')return;
+    if(message.type==='screen'){applyAudienceScreen(message.mode);return;}
+    if(message.type==='laser'&&Number(message.index)===idx){audienceLaser=message.point||null;audienceLaserHideAt=Date.now()+650;renderInks();return;}
+    if(message.type==='circle'&&Number(message.index)===idx&&message.circle){audienceCircles.push(message.circle);renderInks();return;}
+    if(message.type==='clear'&&Number(message.index)===idx){audienceCircles=[];renderInks();return;}
+    if(message.type==='goto'||message.type==='ping'){
+      if(message.type==='goto'){audienceCircles=Array.isArray(message.circles)?message.circles:[];applyAudienceScreen(message.screenMode);go(Number(message.index),{force:true});}
       emit({type:'ack',index:idx,seq:Number(message.seq)});
     }
   }
-  function sendGoto(force=false){if(mode!=='presenter')return;if(force||lastAckIndex!==idx)seq++;emit({type:'goto',index:idx,seq});updateSyncStatus();}
+  function sendGoto(force=false){
+    if(mode!=='presenter'||audienceFrozen)return;if(force||lastAckIndex!==idx)seq++;
+    emit({type:'goto',index:idx,seq,screenMode,circles});updateSyncStatus();
+  }
   function syncState(){
-    if(popupBlocked)return'blocked';
-    if(audienceWindow&&audienceWindow.closed)return'disconnected';
+    if(popupBlocked)return'blocked';if(audienceWindow&&audienceWindow.closed)return'disconnected';if(audienceFrozen)return'frozen';
     if(!lastAckAt)return audienceOpenedAt&&Date.now()-audienceOpenedAt<2600?'connecting':(audienceOpenedAt?'unsynced':'disconnected');
-    if(Date.now()-lastAckAt>2600||lastAckIndex!==idx||lastAckSeq<seq)return'unsynced';
-    return'synced';
+    if(Date.now()-lastAckAt>2600||lastAckIndex!==idx||lastAckSeq<seq)return'unsynced';return'synced';
   }
   function updateSyncStatus(){
     const el=document.getElementById('ppt-sync');if(!el)return;const state=syncState();
-    const labels={blocked:'弹窗被拦截',disconnected:'未连接',connecting:'连接中',unsynced:'未同步',synced:`已同步 · 第 ${idx+1} 页`};
+    const labels={blocked:'弹窗被拦截',disconnected:'未连接',connecting:'连接中',unsynced:'未同步',frozen:'已冻结',synced:`已同步 · 第 ${idx+1} 页`};
     el.dataset.state=state;el.textContent=`观众屏 · ${labels[state]}`;
   }
   function reopenAudience(){
     initTransport();popupBlocked=false;audienceOpenedAt=Date.now();lastAckAt=0;lastAckIndex=-1;lastAckSeq=-1;
+    if(audienceFrozen){audienceFrozen=false;screenMode='normal';}
     audienceWindow=window.open(frameUrl('audience',idx),`guizang-ppt-audience-${session}`,'popup=yes,width=1440,height=900');
     if(!audienceWindow)popupBlocked=true;updateSyncStatus();
   }
   function enterPresenter(openAudience=true){
     if(mode==='presenter')return;lowPowerBeforePresenter=window.__lowPowerMode;mode='presenter';initTransport();mountShell();
     document.body.classList.remove('ppt-audience','ppt-preview');document.body.classList.add('ppt-presenter');document.title=`演讲者视图 · ${originalTitle}`;
-    window.__setLowPowerMode?.(true,{persist:false});updateShell();if(openAudience)reopenAudience();
+    window.__setLowPowerMode?.(true,{persist:false});updateShell();armAutoAdvance();if(openAudience)reopenAudience();
   }
   function exitPresenter(){
-    emit({type:'bye'});mode='deck';document.body.classList.remove('ppt-presenter');document.title=originalTitle;window.__setLowPowerMode?.(lowPowerBeforePresenter,{persist:false});
+    if(rehearsalActive)finishRehearsal(false);else if(timerRunning){commitRunningTime();timerRunning=false;}emit({type:'bye'});mode='deck';document.body.classList.remove('ppt-presenter');document.title=originalTitle;window.__setLowPowerMode?.(lowPowerBeforePresenter,{persist:false});
+  }
+  function initAudience(){
+    mode='audience';document.body.classList.add('ppt-audience');document.title=`观众屏 · ${originalTitle}`;
+    document.body.insertAdjacentHTML('beforeend','<canvas id="ppt-audience-ink" aria-hidden="true"></canvas><div id="ppt-audience-cover" aria-hidden="true"></div>');
+    const resize=()=>{sizeInk(document.getElementById('ppt-audience-ink'),innerWidth,innerHeight);renderInks();};addEventListener('resize',resize);resize();
+    initTransport();emit({type:'ready',index:idx});
   }
-  function initAudience(){mode='audience';document.body.classList.add('ppt-audience');document.title=`观众屏 · ${originalTitle}`;initTransport();emit({type:'ready',index:idx});}
   function initPreview(){mode='preview';document.body.classList.add('ppt-preview');window.__setLowPowerMode?.(true,{persist:false});}
-  function onSlideChange(){if(mode==='presenter'){updateShell();sendGoto();}}
+  function onSlideChange(nextIndex){
+    if(mode!=='presenter')return;rollSlideTimer(nextIndex);circles=[];draftCircle=null;laserPoint=null;annotationPointerDown=false;armAutoAdvance();updateShell();sendGoto();
+  }
   function handleKey(e){
     const editable=e.target?.matches?.('input,textarea,[contenteditable="true"]');
     if(editable){if(e.key==='Escape')e.target.blur();return true;}
     if(mode==='audience'||mode==='preview'){e.preventDefault();return true;}
     if(mode==='deck'&&e.key?.toLowerCase()==='p'&&!e.metaKey&&!e.ctrlKey&&!e.altKey){e.preventDefault();enterPresenter(true);return true;}
     if(mode!=='presenter')return false;
-    if(e.key==='Escape'){e.preventDefault();toggleOverview();return true;}
+    const key=e.key?.toLowerCase();
+    if(e.key==='?'||key==='/'){e.preventDefault();openShortcuts();return true;}
+    const dialog=document.getElementById('ppt-dialog');
+    if(!dialog?.hidden){if(e.key==='Escape'){e.preventDefault();closeDialog();}return true;}
+    if(e.key==='Escape'){e.preventDefault();if(annotationTool!=='none')setAnnotationTool('none');else toggleOverview();return true;}
     if(overviewOn)return true;
+    if(key==='l'){e.preventDefault();setAnnotationTool('laser');return true;}
+    if(key==='c'){e.preventDefault();setAnnotationTool('circle');return true;}
+    if(key==='x'){e.preventDefault();clearAnnotations(true);return true;}
+    if(key==='b'){e.preventDefault();setScreenMode(screenMode==='black'?'normal':'black');return true;}
+    if(key==='w'){e.preventDefault();setScreenMode(screenMode==='white'?'normal':'white');return true;}
+    if(key==='f'){e.preventDefault();setScreenMode(audienceFrozen?'normal':'frozen');return true;}
+    if(key==='a'){e.preventDefault();toggleAutoAdvance();return true;}
+    if(key==='r'){e.preventDefault();toggleRehearsal();return true;}
     if(['ArrowRight','PageDown',' ','ArrowDown'].includes(e.key)){e.preventDefault();go(idx+1,{force:true});return true;}
     if(['ArrowLeft','PageUp','ArrowUp'].includes(e.key)){e.preventDefault();go(idx-1,{force:true});return true;}
     if(e.key==='Home'){e.preventDefault();go(0,{force:true});return true;}
@@ -915,8 +1189,11 @@ window.__pptPresenter=(()=>{
     document.getElementById('ppt-presenter-btn')?.addEventListener('click',()=>enterPresenter(true));
     if(requestedMode==='audience')initAudience();else if(requestedMode==='preview')initPreview();else if(requestedMode==='presenter')enterPresenter(false);
   }
-  setInterval(()=>{renderTimer();if(mode==='presenter'){if(audienceWindow?.closed)updateSyncStatus();emit({type:'ping',index:idx,seq});updateSyncStatus();}},1000);
-  return{initMode,onSlideChange,handleKey,slideLabel,enterPresenter,reopenAudience};
+  setInterval(()=>{
+    renderTimer();renderInks();updateAutoAdvance();
+    if(mode==='presenter'&&Date.now()-lastPingAt>900){lastPingAt=Date.now();if(audienceWindow?.closed)updateSyncStatus();emit({type:'ping',index:idx,seq});updateSyncStatus();}
+  },250);
+  return{initMode,onSlideChange,handleKey,slideLabel,enterPresenter,reopenAudience,debugState:()=>({mode,idx,session,syncState:syncState(),timerRunning,rehearsalActive,autoEnabled,autoGlobalSeconds,autoRemainingMs,screenMode,annotationTool,circles:[...circles],audienceCircles:[...audienceCircles],layoutMode})};
 })();
 
 addEventListener('keydown',e=>{
diff --git a/references/checklist.md b/references/checklist.md
index 5098909..6174d15 100644
--- a/references/checklist.md
+++ b/references/checklist.md
@@ -8,7 +8,7 @@
 
 ## 🔴 P0 · 一定不能犯的错
 
-### 0-P. 演讲者模式必须可控、可恢复、备注不串页
+### 0-P. 演讲者模式必须可控、可排练、可恢复、备注不串页
 
 **现象**:演讲者端已经翻页,观众屏仍停在上一页;观众窗口关闭后没有提示;页面重排后,用户改过的讲稿跑到了另一页;或演讲模式入口变成页面右上角的突兀按钮。
 
@@ -18,6 +18,12 @@
 - 两个预览 iframe 必须严格保持 `16:9`,容器不足时等比缩小并留边,不得裁切或拉伸;小屏优先压缩下一页预览高度。
 - 演讲者控制顺序固定为 `首页 / 上一页 / 总览 / 下一页 / 尾页`;尾页时最后一个按钮变为“重新开始”。
 - 观众屏必须显示软件链路状态:`连接中 / 已同步 / 未同步 / 未连接 / 弹窗被拦截`,并始终提供“重新打开观众屏”。
+- 演讲者必须能看到总时长、本页时长、计划/剩余/超时;缺失 `minutes` 时显示横杠,不猜测。
+- 排练模式记录每页实际时长,本地保留最近 5 次;只做数据汇总,不做 AI 教练评分。
+- 自动翻页默认关闭,`minutes` 与 `autoAdvanceSeconds` 必须分开;总览、圈选、设置、页面隐藏、观众屏暂停或失同步时倒计必须暂停。
+- 必须提供激光笔、圈选、清除、黑屏、白屏和冻结/恢复;标注坐标要归一化同步到观众屏。
+- 演前检查必须覆盖观众屏、弹窗、全屏、字体、图片/视频和 16:9;同时明确提醒它不能检测物理线缆。
+- 备注里的 `section / cue / interaction / delivery / advance / fallback / pronunciation / autoAdvanceSeconds` 都是可选字段;用户大纲没有就整段隐藏。
 - 每页必须有稳定、唯一的 `data-slide-id`;`SPEAKER_NOTES` 数量、顺序和 ID 必须逐页一致。
 - 备注本地编辑按页面 ID 保存;切页重置滚动位置并显示保存状态。
 - 浏览器只能确认观众页面是否同步,不能确认 HDMI/投影线物理连接;现场仍要目视检查外接屏。
@@ -28,7 +34,7 @@
 node <SKILL_ROOT>/scripts/validate-presenter-mode.mjs path/to/index.html
 ```
 
-浏览器里关闭观众窗口,确认状态变化;再点击“重新打开观众屏”,确认它恢复到演讲者当前页。缩小浏览器窗口再检查一次:当前页与下一页仍上下排列,两个 iframe 的 `width / height` 仍约等于 `16 / 9`,且没有超出预览容器。
+浏览器里关闭观众窗口,确认状态变化;再点击“重新打开观众屏”,确认它恢复到演讲者当前页。再逐项实测计时、排练、自动翻页暂停/恢复、激光笔、圈选、清除、黑屏、白屏、冻结和演前检查。缩小浏览器窗口再检查一次:当前页与下一页仍上下排列,两个 iframe 的 `width / height` 仍约等于 `16 / 9`,且没有超出预览容器。
 
 ### 0-S. Swiss locked mode:正文页必须来自原始 22P
 
diff --git a/references/presenter-mode.md b/references/presenter-mode.md
index cbcb888..11c96a5 100644
--- a/references/presenter-mode.md
+++ b/references/presenter-mode.md
@@ -1,22 +1,34 @@
 # 演讲者模式与演讲备注契约
 
-制作任何需要现场讲述的 deck 时加载本文件。目标不是把页面文案复制到备注区，而是让页面、讲述和转场形成一条可以排练的叙事链。
+制作任何需要现场讲述的 deck 时加载本文件。目标不是把页面文案复制到备注区，而是让页面、讲述、转场、时间和现场控制形成一条可以排练和可以恢复的叙事链。
 
-## 1. 页面计划必须同时规划“看什么”和“说什么”
+## 1. 页面计划同时规划“看什么”和“说什么”
 
-在写 HTML 前，先做一张表：
+在写 HTML 前，先做一张表。只填用户大纲、素材或已确认的现场信息能够支持的列：
 
-| 页码 | `data-slide-id` | 页面目的 | 观众屏可见信息 | 演讲者补充 | 分钟 | 转场 | cue |
-|---|---|---|---|---|---:|---|---|
+| 页码 | `data-slide-id` | 章节 | 页面目的 | 观众屏可见信息 | 演讲者补充 | 建议时长 | 转场 | 可选现场信息 |
+|---|---|---|---|---|---|---:|---|---|
 
 - **观众屏可见信息**：观众此刻必须读到的结论、证据、结构或图像。
 - **演讲者补充**：背景、例子、判断依据、语气和细节，不要逐字复述页面。
 - **转场**：解释下一页为什么紧接着出现，不要只写“下一页”。
-- **cue**：可选的舞台动作，如停顿、提问、播放视频、切 Demo、提醒敏感信息。
+- **可选现场信息**：可包含停顿、提问、Demo、视频、敏感信息、翻页时机、备用方案或读音。
 
 默认生成“提词卡”，不是逐字稿。只有用户明确要求逐字稿时，才写完整口播。
 
-## 2. 稳定的页面 ID
+## 2. 模型如何把大纲信息带进演讲模式
+
+对用户的大纲、项目记录和补充说明做结构化提取，不要自行增加现场事实。
+
+- 已给出章节名或可靠推断的连续章节：写入 `section`。
+- 已给出总时长或逐页节奏：可给出 `minutes`，总建议时长不超过现场时长的 90%。
+- 大纲明确写了停顿、提问、Demo、视频、语气、翻页点或备用路径：分别写入对应的可选字段。
+- 用户明确要求某页自动停留多少秒：才写 `autoAdvanceSeconds`。
+- 没有提供的信息不猜测、不写“待补充”到演讲界面，直接省略字段。界面对缺失时长显示横杠，其他可选模块整段隐藏。
+
+`minutes` 是讲述计划，`autoAdvanceSeconds` 是播放行为，二者必须分开。不得因为一页建议讲 1 分钟，就默认 60 秒后自动翻页。
+
+## 3. 稳定的页面 ID
 
 每一页都必须有唯一、语义化且稳定的 ID：
 
@@ -28,7 +40,7 @@
 - 页面重排时保留原 ID；只有页面语义彻底改变时才更换。
 - 不要用页码作为 ID。演讲者在浏览器里修改的备注按 ID 保存，稳定 ID 可避免重排后串页。
 
-## 3. `SPEAKER_NOTES` 数据结构
+## 4. `SPEAKER_NOTES` 数据结构
 
 在 deck 中保留一条与每页 ID 对应的记录，顺序必须与 slide 完全一致：
 
@@ -37,6 +49,7 @@ const SPEAKER_NOTES = [
   {
     id: 'codepilot-capabilities',
     title: 'CodePilot 能做什么',
+    section: 'CodePilot',
     minutes: 0.9,
     purpose: '先让观众建立完整产品认知，再进入实现过程',
     talk: [
@@ -45,39 +58,81 @@ const SPEAKER_NOTES = [
       '强调模型、工具和上下文可以在同一工作流里协作'
     ],
     transition: '观众知道产品长什么样后，再回答为什么要这样实现',
-    cue: '按截图顺序指向四个能力区'
+    cue: '按截图顺序指向四个能力区',
+    advance: '讲完“同一工作流”后翻页'
   }
 ];
 window.__SPEAKER_NOTES__ = SPEAKER_NOTES;
 ```
 
-硬规则：
+必填字段：
 
-- `id`、`title`、`minutes`、`purpose`、`talk`、`transition` 必填，`cue` 可选。
+- `id`、`title`、`purpose`、`talk`、`transition`。
 - `talk` 默认 3–5 条，每条只表达一个意思；封面、章节页和纯过渡页可以更短。
-- 不编造原素材没有的数字、事实或经历；信息缺失时标记“待补充”或向用户询问。
-- 总建议时长不超过用户时长的 90%，给停顿、现场互动和意外留出约 10% 缓冲。
-- 封面只负责建立问题与预期；Demo 页写清操作顺序和失败兜底；尾页回扣开场并给出行动点。
 
-## 4. 演讲者界面行为
+可选字段：
+
+| 字段 | 用途 | 界面缺失时 |
+|---|---|---|
+| `section` | 章节名和章节进度 | 隐藏章节行 |
+| `minutes` | 本页建议讲述分钟 | 显示 `—` |
+| `cue` | 停顿、Demo、视频、敏感信息提醒 | 隐藏 |
+| `interaction` | 现场提问、举手、投票或 Q&A | 隐藏 |
+| `delivery` | 语气、重音、语速或停顿 | 隐藏 |
+| `advance` | 人工翻页的句子或动作时机 | 隐藏 |
+| `fallback` | Demo / 视频 / 网络失败时的备用说法 | 隐藏 |
+| `pronunciation` | 人名、缩写和外语读音 | 隐藏 |
+| `autoAdvanceSeconds` | 本页自动停留秒数，优先于全局间隔 | 使用全局间隔或不自动翻页 |
+
+`cue`、`interaction`、`delivery`、`advance`、`fallback`、`pronunciation` 可以是字符串，也可以是字符串数组。
+
+## 5. 演讲者界面行为
 
 - 普通 deck 的右下角控制区显示 `P 演讲模式`，不单独悬浮一个抢眼按钮。
 - 点击后当前窗口进入演讲者视图，并打开独立观众屏。
-- 演讲者主体保持两栏：左侧预览、右侧备注；左侧“当前页在上、下一页在下”，不要再把两个预览左右并排成第三栏。
-- 当前页与下一页 iframe 必须始终保持严格 `16:9`。空间不足时在预览容器内留边并整体等比缩小，不得裁切、压扁或让页面内部文字重新排版；小屏优先缩小下一页预览，把空间留给当前页。
+- 主体保持两栏：左侧预览、右侧备注；左侧当前页在上、下一页在下。
+- 当前页与下一页 iframe 始终严格保持 `16:9`。空间不足时留边并整体等比缩小，不得裁切、压扁或让页面内部文字重新排版。
+- 小屏优先缩小下一页预览，把空间留给当前页。
 - 控制顺序固定为：`首页 / 上一页 / 总览 / 下一页 / 尾页`；到尾页后“尾页”变为“重新开始”。
-- 总览卡片显示页码、标题和当前页高亮，点击缩略图直接跳页；`ESC` 同样切换总览。
-- 计时器由用户显式开始，可暂停、继续、重置；不要进入模式就自动计时。
+- 总览卡片显示页码、标题和当前页高亮，点击缩略图直接跳页；`ESC` 切换总览。
+- 演讲者可从“均衡 / 页面优先 / 备注优先”三种布局选择。
 - 备注编辑按 `data-slide-id` 存入 `localStorage`，显示保存状态；切页后备注滚动回顶部，并允许调整字号。
 - `Home` / `End`、方向键、PageUp/PageDown 与可见按钮保持一致；光标在备注编辑器中时不得触发翻页。
 
-## 5. 观众屏同步与恢复
+## 6. 时间控制与排练
+
+- 计时器由用户显式开始，可暂停、继续和重置；不要进入模式就自动计时。
+- 同时显示总实际时长、本页实际时长、本页计划、剩余或超时。
+- 只有每页都有 `minutes` 时，才显示总计划和预计结束时间；部分页缺失时显示横杠。
+- 有 `section` 时显示章节位置；该章节每页都有计划时长时，再显示章节剩余时间。
+- 排练模式记录每页实际时长和总时长，本地保留最近 5 次。
+- 排练结果只做数据汇总，不生成“AI 教练”式评判。
+
+## 7. 自动翻页
+
+- 默认关闭，由用户显式开启。
+- 可设置全局间隔；页面存在 `autoAdvanceSeconds` 时优先使用页面值。
+- 进入总览、正在圈选、打开设置、浏览器页面不可见、观众屏黑屏/白屏/冻结或观众屏失去同步时，自动倒计暂停。
+- 离开暂停状态后从原剩余时间继续，不重头计时。
+- 到尾页后停止，不自动回到首页。
+
+## 8. 激光笔、圈选与观众屏控制
+
+- `L` 切换激光笔，红点短暂淡出，不保存。
+- `C` 切换圈选，圈选保留在当前页；翻页时清除。
+- `X` 清除当前页标注。
+- 所有坐标归一化后传给观众屏，不受演讲者屏和观众屏尺寸差异影响。
+- `B` 切换观众屏黑屏，`W` 切换白屏，`F` 冻结/恢复观众屏。
+- 冻结时演讲者可以继续翻页，观众屏保留原页；恢复时立即追平演讲者当前页。
+
+## 9. 观众屏同步与恢复
 
 模板同时使用窗口 `postMessage`、`BroadcastChannel` 和 `storage` 事件同步。观众页在加载和每次翻页后回传确认，演讲者端显示：
 
 - **连接中**：观众窗口已打开，尚未收到确认。
 - **已同步**：观众页确认的页码与演讲者页相同，心跳有效。
 - **未同步**：确认超时或两端页码不同。
+- **已冻结**：观众屏故意保留原页，不是同步故障。
 - **未连接**：观众窗口未打开或已关闭。
 - **弹窗被拦截**：浏览器阻止打开观众窗口。
 
@@ -85,11 +140,37 @@ window.__SPEAKER_NOTES__ = SPEAKER_NOTES;
 
 浏览器只能确认观众**页面/窗口**的软件同步状态，不能检测 HDMI、转接器或投影仪线缆是否物理断开。现场仍应目视确认外接屏。
 
-## 6. 生成后验证
+## 10. 演前检查和快捷键
+
+“检查”面板检查观众屏同步、弹窗权限、全屏、字体、图片、视频和当前页 16:9。检查结果不得宣称物理外接屏已连接。
+
+| 键 | 行为 |
+|---|---|
+| `L` | 激光笔 |
+| `C` | 圈选 |
+| `X` | 清除标记 |
+| `B` / `W` | 观众屏黑屏 / 白屏 |
+| `F` | 冻结 / 恢复观众屏 |
+| `A` | 开启 / 关闭自动翻页 |
+| `R` | 开始 / 结束排练 |
+| `?` | 打开快捷键说明 |
+
+## 11. 能力边界
+
+这个演讲模式只依赖当前 HTML 和浏览器本地能力，不需要账号或在线服务。不要默认加入：
+
+- 实时字幕、语音转文字或外部语音模型。
+- AI 排练教练或对演讲者的评分。
+- 扫码提问、在线投票或云端互动后台。
+- 手机遥控或需要服务端中继的跨设备控制。
+
+## 12. 生成后验证
 
 ```bash
 node <SKILL_ROOT>/scripts/validate-presenter-mode.mjs path/to/index.html
 node <SKILL_ROOT>/scripts/validate-presenter-mode.mjs path/to/index.html --target-minutes 30
 ```
 
-浏览器实测至少包含：进入演讲模式、弹窗允许/拦截、前后翻页、总览跳页、首页/尾页、尾页重新开始、观众窗口关闭后的状态变化、重新打开后恢复同步、备注保存与重排后不串页。至少在一组常用尺寸和一组小屏尺寸下检查当前页/下一页为上下排列，两个 iframe 宽高比均为 `16:9`，且没有超出各自容器。
+浏览器实测至少包含：进入演讲模式、弹窗允许/拦截、前后翻页、总览跳页、首页/尾页、尾页重新开始、观众窗口关闭后的状态变化、重新打开后恢复同步、备注保存、计时、排练记录、自动翻页暂停/恢复、激光笔、圈选、清除、黑屏、白屏、冻结与演前检查。
+
+至少在一组常用尺寸和一组小屏尺寸下检查：当前页/下一页上下排列，两个 iframe 宽高比均为 `16:9`，且没有超出各自容器。
diff --git a/scripts/validate-presenter-mode.mjs b/scripts/validate-presenter-mode.mjs
index bd4965a..f10ff3f 100644
--- a/scripts/validate-presenter-mode.mjs
+++ b/scripts/validate-presenter-mode.mjs
@@ -65,7 +65,15 @@ else{
   speakerNotes.forEach((note,i)=>{
     if(!note||typeof note!=='object'){errors.push(`Note ${i+1}: must be an object.`);return;}
     for(const field of ['id','title','purpose','transition'])if(typeof note[field]!=='string'||!note[field].trim())errors.push(`Note ${i+1}: ${field} is required.`);
-    if(!Number.isFinite(Number(note.minutes))||Number(note.minutes)<=0)errors.push(`Note ${i+1}: minutes must be > 0.`);
+    if(note.minutes!==undefined&&note.minutes!==null&&note.minutes!==''&&(!Number.isFinite(Number(note.minutes))||Number(note.minutes)<=0))errors.push(`Note ${i+1}: minutes must be > 0 when provided.`);
+    if(note.autoAdvanceSeconds!==undefined&&note.autoAdvanceSeconds!==null&&note.autoAdvanceSeconds!==''&&(!Number.isFinite(Number(note.autoAdvanceSeconds))||Number(note.autoAdvanceSeconds)<=0))errors.push(`Note ${i+1}: autoAdvanceSeconds must be > 0 when provided.`);
+    if(note.section!==undefined&&(typeof note.section!=='string'||!note.section.trim()))errors.push(`Note ${i+1}: section must be non-empty text when provided.`);
+    for(const field of ['cue','interaction','delivery','advance','fallback','pronunciation']){
+      const value=note[field];
+      if(value===undefined||value===null||value==='')continue;
+      const valid=typeof value==='string'?Boolean(value.trim()):Array.isArray(value)&&value.length>0&&value.every(x=>typeof x==='string'&&x.trim());
+      if(!valid)errors.push(`Note ${i+1}: ${field} must be non-empty text or an array of non-empty text.`);
+    }
     if(!Array.isArray(note.talk)||!note.talk.length)errors.push(`Note ${i+1}: talk must be a non-empty array.`);
     else{
       if(note.talk.some(x=>typeof x!=='string'||!x.trim()))errors.push(`Note ${i+1}: every talk item must be non-empty text.`);
@@ -90,15 +98,27 @@ const runtimeChecks=[
   ['direct window sync','postMessage('],
   ['BroadcastChannel fallback','BroadcastChannel'],
   ['storage fallback','__guizangPptSync'],
+  ['per-slide timer','id="ppt-time-detail"'],
+  ['rehearsal mode','id="ppt-rehearsal"'],
+  ['auto advance','id="ppt-auto-toggle"'],
+  ['laser and circle tools','id="ppt-presenter-ink"'],
+  ['audience annotation layer','id="ppt-audience-ink"'],
+  ['black, white, and freeze controls','setScreenMode'],
+  ['preflight checks','id="ppt-preflight"'],
+  ['layout presets','data-layout-choice'],
+  ['shortcut help','openShortcuts'],
 ];
 for(const [label,needle]of runtimeChecks)if(!html.includes(needle))errors.push(`Presenter runtime missing ${label}.`);
 if(/\.ppt-preview-stack\{[^}]*grid-template-columns/.test(html))errors.push('Presenter previews must stack vertically; remove grid-template-columns from .ppt-preview-stack.');
 
-const planned=speakerNotes.reduce((sum,n)=>sum+(Number(n?.minutes)||0),0);
-if(Number.isFinite(targetMinutes)&&targetMinutes>0&&planned>targetMinutes*.9)errors.push(`Planned ${planned.toFixed(1)} min exceeds the 90% speaking budget (${(targetMinutes*.9).toFixed(1)} of ${targetMinutes} min).`);
-if(Number.isFinite(targetMinutes)&&targetMinutes>0&&planned<targetMinutes*.55)warnings.push(`Planned ${planned.toFixed(1)} min is below 55% of the requested ${targetMinutes} min; confirm the deck is not under-scripted.`);
+const timedNotes=speakerNotes.filter(n=>Number.isFinite(Number(n?.minutes))&&Number(n.minutes)>0);
+const planned=timedNotes.reduce((sum,n)=>sum+Number(n.minutes),0);
+const completePlan=speakerNotes.length>0&&timedNotes.length===speakerNotes.length;
+if(timedNotes.length&&!completePlan)warnings.push(`Timing is partial: ${timedNotes.length} of ${speakerNotes.length} notes provide minutes; total-budget checks are skipped.`);
+if(completePlan&&Number.isFinite(targetMinutes)&&targetMinutes>0&&planned>targetMinutes*.9)errors.push(`Planned ${planned.toFixed(1)} min exceeds the 90% speaking budget (${(targetMinutes*.9).toFixed(1)} of ${targetMinutes} min).`);
+if(completePlan&&Number.isFinite(targetMinutes)&&targetMinutes>0&&planned<targetMinutes*.55)warnings.push(`Planned ${planned.toFixed(1)} min is below 55% of the requested ${targetMinutes} min; confirm the deck is not under-scripted.`);
 
 warnings.forEach(x=>console.warn(`WARN  ${x}`));
 errors.forEach(x=>console.error(`ERROR ${x}`));
-console.log(`Presenter validation: ${slideIds.length} slides, ${speakerNotes.length} notes, ${planned.toFixed(1)} planned minutes, ${errors.length} errors, ${warnings.length} warnings.`);
+console.log(`Presenter validation: ${slideIds.length} slides, ${speakerNotes.length} notes, ${completePlan?planned.toFixed(1):'partial / —'} planned minutes, ${errors.length} errors, ${warnings.length} warnings.`);
 process.exit(errors.length?1:0);