diff --git a/apps/studio/src/components/Ref17Cover.tsx b/apps/studio/src/components/Ref17Cover.tsx
index 5f88822..37556a4 100644
--- a/apps/studio/src/components/Ref17Cover.tsx
+++ b/apps/studio/src/components/Ref17Cover.tsx
@@ -11,7 +11,7 @@ export function Ref17Cover({template,slide,masthead=template.masthead,guides=fal
  const bodySize=Math.min(32,...body.map(s=>sW/Math.max(1,Array.from(s).reduce((n,c)=>n+(/[\u3400-\u9fff]/.test(c)?1:.5),0))));
  const accent=slide.accent||'#d8ddd4';
  return <svg xmlns="http://www.w3.org/2000/svg" viewBox={`0 0 ${W} ${H}`} width={W} height={H} role="img" aria-label={`${slide.label||slide.heading}，ref-17 模板封面试版`} data-layout-id={template.id} style={{display:'block',width:'100%',height:'auto'}}>
-  <title>{slide.label||slide.heading} · 模板试版</title><desc>源自 ref-17 的九个固定构件。图片位使用色块，占位文案可替换，暂无具体工具内容。</desc>
+  <title>{(slide.label||slide.heading)+' · 模板试版'}</title><desc>源自 ref-17 的九个固定构件。图片位使用色块，占位文案可替换，暂无具体工具内容。</desc>
   <rect width={W} height={H} fill={template.paper}/>
   <g data-slot="I01"><rect x={mx} y={my} width={mw} height={mh} fill={slide.color}/></g>
   <g data-slot="I02"><ellipse cx={cx+cw/2} cy={cy+ch/2} rx={cw/2} ry={ch/2} fill={accent}/></g>
diff --git a/apps/studio/src/lib/native-layout.ts b/apps/studio/src/lib/native-layout.ts
index fe174a4..ea19c4f 100644
--- a/apps/studio/src/lib/native-layout.ts
+++ b/apps/studio/src/lib/native-layout.ts
@@ -9,28 +9,29 @@ export const designUrl=(layoutId:string,id:string)=>`/studio/layouts/${layoutId}
 export function nativeLayout(layout:Layout):Layout {
  return {id:layout.id,name:layout.name,width:layout.width,height:layout.height,elements:layout.elements.map(({id,kind,role,box,direction,text,reading})=>({id,kind,role,box,direction,text,reading}))};
 }
-// Four coordinated inks per composition: paper, ink, image field and accent.
+// Each composition has its own paper and inks; layered artwork can add a middle tone.
 const palettes=[
  ['#f3eee4','#293b42','#7c9a9e','#c4d5cb'],['#f5f2e9','#344335','#879782','#d7c39f'],['#efede7','#383d4a','#8996a6','#c5d0d7'],
- ['#647c7a','#f5f0e5','#b6c8be','#d9ded0'],['#f5eddf','#5c3b32','#b47d68','#d9bba0'],['#eceee8','#263d43','#688a94','#b4c7c7'],
+ ['#5e7472','#f5f0e5','#354e4a','#d9ded0'],['#f5eddf','#5c3b32','#b47d68','#d9bba0'],['#eceee8','#263d43','#688a94','#b4c7c7'],
  ['#f3eddf','#4c4a36','#a1a185','#d8cba9'],['#edf0ef','#23424b','#73929a','#b6cbd2'],['#f5f1e9','#2f3e38','#7f9688','#d1d7ba'],
  ['#eeece4','#344b57','#526e80','#afc4c9'],['#f4eee8','#4e393b','#a58a90','#d8bdb3'],['#f1f0e9','#424b36','#8c997b','#d1c7aa'],
  ['#f3ebe5','#5b3e39','#b48e7e','#dec6ab'],['#eef0e7','#384c42','#789485','#c4d1b5'],['#e9edee','#2e4555','#839ba8','#c6d3d4'],
  ['#f4f0e7','#50483a','#ada18a','#d9d1c0'],['#eeeee5','#394d42','#7e9785','#c8d5bc'],['#f2ede6','#3e424e','#8a92a3','#d0c7c0'],
  ['#f5eede','#443d31','#a79b7a','#dbca9f'],['#eeefe8','#34463f','#809b89','#c5d3ba'],['#f0ebe5','#51413d','#a48b7f','#d5bfb3'],
- ['#64797d','#f8f2e8','#9fb3b5','#cbd4c9'],['#f0efe9','#2f414d','#8199a7','#c5d2d6'],['#f4eee5','#5a443b','#ae927b','#dfc8ac'],
+ ['#64797d','#142a2e','#b5c7c7','#3d565b','#7c9497'],['#f0efe9','#2f414d','#8199a7','#c5d2d6'],['#f4eee5','#5a443b','#ae927b','#dfc8ac'],
  ['#ebeee8','#344b41','#829c8b','#c7d5bb'],['#edece8','#3c4354','#8b93aa','#c5cbd7'],['#f2ece2','#3b4e4b','#6f918c','#b8cdc3']
 ];
 export function layoutPalette(id:string){return palettes[Number(id.slice(4))-1]||['#ffe5df','#303d43','#a9bec0','#f0bca6']}
 export function paperColor(id:string){return layoutPalette(id)[0]}
-export function textColor(id:string,slot:Slot){return (id==='ref-04'&&['T01','T02'].includes(slot.id))||(id==='ref-22'&&slot.id==='T01')||(id==='ref-27'&&slot.id==='T01')||(id==='ref-10'&&slot.id==='T03')?'#f9faf5':layoutPalette(id)[1]}
+export function textColor(id:string,slot:Slot){return (id==='ref-04'&&['T01','T02'].includes(slot.id))||(id==='ref-22'&&['T01','T03','T04'].includes(slot.id))||(id==='ref-27'&&slot.id==='T01')||(id==='ref-10'&&slot.id==='T03')?'#f9faf5':layoutPalette(id)[1]}
 // The screenshot's illegible small print is replaced with editable editorial copy.
 export function defaultText(layout:Layout,slot:Slot):string {
  if(slot.text)return slot.text;
  if(slot.direction==='curved')return 'BULUBLUE DESIGN · FORM AND SPACE · EDITORIAL DESIGN ·';
  if(slot.role.includes('日期'))return '2025 / 03 / 25';
+ if(slot.role.includes('微字'))return slot.box[2]>60?'FORM / SPACE / DESIGN / 2026':'FORM / '+layout.id.slice(-2);
  if(slot.role.includes('英文')||slot.role.includes('品牌')||slot.role.includes('标识'))return 'BULUBLUE DESIGN';
- if(slot.role.includes('图注')||slot.role.includes('标签')||slot.box[3]<10)return 'FORM / SPACE / DESIGN';
+ if(slot.role.includes('图注')||slot.role.includes('标签')||slot.box[3]<10)return slot.box[2]<25?'FORM / '+layout.id.slice(-2):'FORM / SPACE / DESIGN';
  if(slot.direction==='vertical')return '设计灵感 · 日常观察';
  return slot.box[2]<25?'留白之间\n观察日常\n记录灵感':'让文字与形状相遇。\n在留白之间，寻找新的秩序。';
 }
@@ -42,14 +43,16 @@ export function textSize(layout:Layout,slot:Slot,text:string):number {
  const length=(s:string)=>Array.from(s).reduce((n,c)=>n+(/[\u3400-\u9fff]/.test(c)?1:/[A-Z]/.test(c)?.8:.6),0);
  if(slot.direction==='vertical')return Math.min(w*.9,h/Math.max(1,Array.from(text.replaceAll('\n','')).length)*.88);
  if(slot.direction==='rotated')return Math.min(w*.85,h/Math.max(1,length(text)));
- if(slot.direction==='curved')return Math.min(2.2,w/Math.max(1,length(text)));
- return Math.min(h/(lines.length*1.15),w/Math.max(1,...lines.map(length)))*.92;
+ if(slot.direction==='curved')return Math.min(2.2,Math.max(w,h)*1.1/Math.max(1,length(text)));
+ const fitted=Math.min(h/(lines.length*1.15),w/Math.max(1,...lines.map(length)))*.92;
+ return /微字|脚注|图注|标签/.test(slot.role)?Math.min(fitted,2.2):fitted;
 }
 export function imageShape(layout:Layout,slot:Slot):CSSProperties {
  const n=Number(layout.id.slice(4)),s:CSSProperties={backgroundColor:layoutPalette(layout.id)[slot.id==='I01'?2:3],backgroundImage:'linear-gradient(145deg,#ffffff12,transparent 65%)'};
  if([4,5,7,13,19,20].includes(n)||(n===17&&slot.id==='I02'))s.borderRadius='50%';
  if(n===4)s.transform='rotate(-9deg)';
  if(n===15&&slot.id==='I01')s.borderRadius='100% 0 0 0';
+ if(n===22)s.backgroundColor=layoutPalette(layout.id)[slot.id==='I02'?3:slot.id==='I03'?4:2];
  if(n===22)s.clipPath=slot.id==='I01'?'polygon(0 0,100% 0,100% 48%,0 100%)':slot.id==='I02'?'polygon(0 30%,100% 0,100% 70%,0 100%)':'polygon(0 50%,100% 0,100% 100%,0 100%)';
  if(n===27)s.clipPath=slot.id==='I01'?'polygon(0 0,100% 35%,100% 100%,0 68%)':'polygon(0 40%,100% 0,100% 100%,0 100%)';
  if(n===10)s.backgroundColor=layoutPalette(layout.id)[2];
diff --git a/apps/studio/src/styles/globals.css b/apps/studio/src/styles/globals.css
index 044a073..943c137 100644
--- a/apps/studio/src/styles/globals.css
+++ b/apps/studio/src/styles/globals.css
@@ -84,3 +84,5 @@
 
 /* Keep the cross-axis line box inside narrow vertical title slots. */
 .native-copy.direction-vertical,.native-copy.direction-rotated{line-height:1}
+
+.ref-19 .native-text:is([data-element=T01],[data-element=T02],[data-element=T03],[data-element=T04]) .native-copy{font-weight:700;letter-spacing:-.06em}
diff --git a/scripts/verify-studio-visual.cjs b/scripts/verify-studio-visual.cjs
index b0562cb..810681b 100644
--- a/scripts/verify-studio-visual.cjs
+++ b/scripts/verify-studio-visual.cjs
@@ -16,13 +16,13 @@ const assert=require('node:assert/strict');
  page.on('response',async response=>{if(response.request().resourceType()==='image'){const url=new URL(response.url());images.push({path:url.pathname+url.search,status:response.status(),type:response.headers()['content-type'],bytes:(await response.body().catch(()=>Buffer.alloc(0))).length})}});
  const metrics=process.argv.includes('--after-layouts')?JSON.parse(await readFile(dir+'/metrics.json','utf8')).metrics:[];
  for(let i=1;i<=27&&!process.argv.includes('--after-layouts');i++){
-  const id='ref-'+String(i).padStart(2,'0');await page.goto(base+'/studio/layouts/'+id,{waitUntil:'networkidle'});await page.locator('article.native-layout').screenshot({path:dir+'/'+id+'.png'});
+  const id='ref-'+String(i).padStart(2,'0');await page.goto(base+'/studio/layouts/'+id,{waitUntil:'networkidle'});await page.locator('article.native-layout').screenshot({path:dir+'/'+id+'.png',style:'.page-tools{visibility:hidden}'});
   const m=await page.locator('article.native-layout').evaluate(el=>({id:el.dataset.layoutId,elements:el.querySelectorAll('[data-element]').length,width:el.clientWidth,height:el.clientHeight,overflow:[...el.querySelectorAll('.native-copy')].filter(e=>e.scrollHeight>e.clientHeight+2||e.scrollWidth>e.clientWidth+2).map(e=>e.closest('[data-element]').dataset.element)}));metrics.push(m);await writeFile(dir+'/metrics.json',JSON.stringify({metrics,images,errors},null,2));
  }
  if(!process.argv.includes('--after-layouts')&&!process.argv.includes('--diagnose'))assert.deepEqual(metrics.filter(m=>m.overflow.length),[],'Default copy must fit every native slot');
  await page.goto(base+'/studio',{waitUntil:'networkidle'});assert.equal(await page.locator('.library-item').count(),27);await page.screenshot({path:dir+'/catalog-desktop.png',fullPage:true});
  const verify=JSON.parse(await readFile('/tmp/studio-library/verification.json','utf8'));
- for(const d of verify.results){await page.goto(base+d.url,{waitUntil:'networkidle'});assert.equal(await page.locator('img').count(),1);const current=await page.locator('img').evaluate(img=>({src:img.currentSrc,complete:img.complete,width:img.naturalWidth}));assert.ok(current.complete&&current.width>0);assert.equal(new URL(current.src).pathname,'/api/preview');await page.locator('article.native-layout').screenshot({path:dir+'/'+d.layoutId+'-saved.png'});
+ for(const d of verify.results){await page.goto(base+d.url,{waitUntil:'networkidle'});assert.equal(await page.locator('img').count(),1);const current=await page.locator('img').evaluate(img=>({src:img.currentSrc,complete:img.complete,width:img.naturalWidth}));assert.ok(current.complete&&current.width>0);assert.equal(new URL(current.src).pathname,'/api/preview');await page.locator('article.native-layout').screenshot({path:dir+'/'+d.layoutId+'-saved.png',style:'.page-tools{visibility:hidden}'});
   await page.getByRole('button',{name:'编辑页面',exact:true}).click();assert.equal(await page.locator('.workbench-top').count(),1);await page.screenshot({path:dir+'/'+d.layoutId+'-editor.png'});
  }
  for(const slug of ['learning-skills-template','layout-selection']){await page.goto(base+'/studio/ideas/'+slug,{waitUntil:'networkidle'});await page.screenshot({path:dir+'/tool-'+slug+'.png',fullPage:true})}