diff --git a/404.html b/404.html
index 8ee63d287..b477f05fa 100644
--- a/404.html
+++ b/404.html
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+      <script id="__config" type="application/json">{"annotate":null,"base":"/","features":["content.action.edit","content.code.annotate","content.code.copy","content.tabs.link","content.tooltips","navigation.indexes","navigation.tracking","search.highlight","search.share","search.suggest","toc.follow"],"search":"/assets/javascripts/workers/search.e2d2d235.min.js","tags":null,"translations":{"clipboard.copied":"已复制","clipboard.copy":"复制","search.result.more.one":"在该页上还有 1 个符合条件的结果","search.result.more.other":"在该页上还有 # 个符合条件的结果","search.result.none":"没有找到符合条件的结果","search.result.one":"找到 1 个符合条件的结果","search.result.other":"# 个符合条件的结果","search.result.placeholder":"键入以开始搜索","search.result.term.missing":"缺少","select.version":"选择当前版本"},"version":null}</script>
     
     
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diff --git a/assets/javascripts/bundle.c2b142ea.min.js b/assets/javascripts/bundle.c2b142ea.min.js
index 59cd679ca..bdce4194a 100644
--- a/assets/javascripts/bundle.c2b142ea.min.js
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i.subscribe({next({offset:s}){e.style.setProperty("--md-tooltip-x",`${s.x}px`),e.style.setProperty("--md-tooltip-y",`${s.y}px`)},complete(){e.style.removeProperty("--md-tooltip-x"),e.style.removeProperty("--md-tooltip-y")}}),Et(e).pipe(Q(a)).subscribe(s=>{e.toggleAttribute("data-md-visible",s)}),R(i.pipe(L(({active:s})=>s)),i.pipe(Be(250),L(({active:s})=>!s))).subscribe({next({active:s}){s?e.prepend(n):n.remove()},complete(){e.prepend(n)}}),i.pipe(Xe(16,je)).subscribe(({active:s})=>{n.classList.toggle("md-tooltip--active",s)}),i.pipe(Lr(125,je),L(()=>!!e.offsetParent),f(()=>e.offsetParent.getBoundingClientRect()),f(({x:s})=>s)).subscribe({next(s){s?e.style.setProperty("--md-tooltip-0",`${-s}px`):e.style.removeProperty("--md-tooltip-0")},complete(){e.style.removeProperty("--md-tooltip-0")}}),b(o,"click").pipe(Q(a),L(s=>!(s.metaKey||s.ctrlKey))).subscribe(s=>{s.stopPropagation(),s.preventDefault()}),b(o,"mousedown").pipe(Q(a),pe(i)).subscribe(([s,{active:c}])=>{var l;if(s.button!==0||s.metaKey||s.ctrlKey)s.preventDefault();else if(c){s.preventDefault();let u=e.parentElement.closest(".md-annotation");u instanceof HTMLElement?u.focus():(l=xt())==null||l.blur()}}),r.pipe(Q(a),L(s=>s===n),It(125)).subscribe(()=>e.focus()),tp(e,t).pipe($(s=>i.next(s)),V(()=>i.complete()),f(s=>H({ref:e},s)))})}function rp(e){let t=Ue();if(e.tagName!=="CODE")return[e];let r=[".c",".c1",".cm"];if(t.annotate){let n=e.closest("[class|=language]");if(n)for(let o of Array.from(n.classList)){if(!o.startsWith("language-"))continue;let[,i]=o.split("-");i in t.annotate&&r.push(...t.annotate[i])}}return P(r.join(", "),e)}function np(e){let t=[];for(let r of rp(e)){let n=[],o=document.createNodeIterator(r,NodeFilter.SHOW_TEXT);for(let i=o.nextNode();i;i=o.nextNode())n.push(i);for(let i of n){let a;for(;a=/(\(\d+\))(!)?/.exec(i.textContent);){let[,s,c]=a;if(typeof c=="undefined"){let 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rect{fill:var(--md-mermaid-edge-color)!important;stroke:none!important}.statediagram-cluster.statediagram-cluster .inner{fill:var(--md-default-bg-color)}.statediagram-cluster rect{fill:var(--md-mermaid-node-bg-color);stroke:var(--md-mermaid-node-fg-color)}.statediagram-state rect.divider{fill:var(--md-default-fg-color--lightest);stroke:var(--md-default-fg-color--lighter)}defs #statediagram-barbEnd{stroke:var(--md-mermaid-edge-color)}[id^=entity] path,[id^=entity] rect{fill:var(--md-default-bg-color)}.relationshipLine{stroke:var(--md-mermaid-edge-color)}defs .marker.oneOrMore.er *,defs .marker.onlyOne.er *,defs .marker.zeroOrMore.er *,defs .marker.zeroOrOne.er *{stroke:var(--md-mermaid-edge-color)!important}text:not([class]):last-child{fill:var(--md-mermaid-label-fg-color)}.actor{fill:var(--md-mermaid-sequence-actor-bg-color);stroke:var(--md-mermaid-sequence-actor-border-color)}text.actor>tspan{fill:var(--md-mermaid-sequence-actor-fg-color);font-family:var(--md-mermaid-font-family)}line{stroke:var(--md-mermaid-sequence-actor-line-color)}.actor-man circle,.actor-man 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I,c=s.pipe(he(),ye(!0));re([s,Re(e),Et(e)]).pipe(Q(c),Xe(1,je)).subscribe({next([{active:l},u]){let p=wt(l),{width:d}=Ae(l);e.style.setProperty("--md-indicator-x",`${p.x}px`),e.style.setProperty("--md-indicator-width",`${d}px`);let m=ln(n);(p.x<m.x||p.x+d>m.x+u.width)&&n.scrollTo({left:Math.max(0,p.x-16),behavior:"smooth"})},complete(){e.style.removeProperty("--md-indicator-x"),e.style.removeProperty("--md-indicator-width")}}),re([Ut(n),Re(n)]).pipe(Q(c)).subscribe(([l,u])=>{let p=Mr(n);i.hidden=l.x<16,a.hidden=l.x>p.width-u.width-16}),R(b(i,"click").pipe(f(()=>-1)),b(a,"click").pipe(f(()=>1))).pipe(Q(c)).subscribe(l=>{let{width:u}=Ae(n);n.scrollBy({left:u*l,behavior:"smooth"})}),r.pipe(Q(c),L(l=>o.includes(l))).subscribe(l=>l.click()),n.classList.add("tabbed-labels--linked");for(let l of o){let 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diff --git a/chapter_appendix/index.html b/chapter_appendix/index.html
index fa6bfdbd1..4d74a4d54 100644
--- a/chapter_appendix/index.html
+++ b/chapter_appendix/index.html
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-          <button type="button" class="md-top md-icon" data-md-component="top" hidden>
-  
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-  回到页面顶部
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-        
       </main>
       
         <footer class="md-footer">
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diff --git a/en/assets/javascripts/bundle.c2b142ea.min.js b/en/assets/javascripts/bundle.c2b142ea.min.js
index 1b47111a7..68879e9b7 100644
--- a/en/assets/javascripts/bundle.c2b142ea.min.js
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rect{fill:var(--md-mermaid-edge-color)!important;stroke:none!important}.statediagram-cluster.statediagram-cluster .inner{fill:var(--md-default-bg-color)}.statediagram-cluster rect{fill:var(--md-mermaid-node-bg-color);stroke:var(--md-mermaid-node-fg-color)}.statediagram-state rect.divider{fill:var(--md-default-fg-color--lightest);stroke:var(--md-default-fg-color--lighter)}defs #statediagram-barbEnd{stroke:var(--md-mermaid-edge-color)}[id^=entity] path,[id^=entity] rect{fill:var(--md-default-bg-color)}.relationshipLine{stroke:var(--md-mermaid-edge-color)}defs .marker.oneOrMore.er *,defs .marker.onlyOne.er *,defs .marker.zeroOrMore.er *,defs .marker.zeroOrOne.er 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t.pipe(g(r=>R(Y(!0),Y(!1).pipe(It(2e3))).pipe(f(n=>({message:r,active:n})))))}function Fs(e,t){let r=G(".md-typeset",e);return j(()=>{let n=new I;return n.subscribe(({message:o,active:i})=>{e.classList.toggle("md-dialog--active",i),r.textContent=o}),dp(e,t).pipe($(o=>n.next(o)),V(()=>n.complete()),f(o=>H({ref:e},o)))})}function hp({viewport$:e}){if(!X("header.autohide"))return Y(!1);let t=e.pipe(f(({offset:{y:o}})=>o),Pt(2,1),f(([o,i])=>[o<i,i]),fe(0)),r=re([e,t]).pipe(L(([{offset:o},[,i]])=>Math.abs(i-o.y)>100),f(([,[o]])=>o),ie()),n=Tn("search");return re([e,n]).pipe(f(([{offset:o},i])=>o.y>400&&!i),ie(),g(o=>o?r:Y(!1)),J(!1))}function Us(e,t){return j(()=>re([Re(e),hp(t)])).pipe(f(([{height:r},n])=>({height:r,hidden:n})),ie((r,n)=>r.height===n.height&&r.hidden===n.hidden),se(1))}function Ns(e,{viewport$:t,header$:r,main$:n}){return j(()=>{let o=new 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index e327bf1da..009de796b 100644
--- a/en/chapter_appendix/contribution/index.html
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-  <svg xmlns="http://www.w3.org/2000/svg" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" class="lucide lucide-circle-arrow-up" viewBox="0 0 24 24"><circle cx="12" cy="12" r="10"/><path d="m16 12-4-4-4 4M12 16V8"/></svg>
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-</button>
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         <footer class="md-footer">
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index 6618a7d5d..d7ac58994 100644
--- a/en/chapter_appendix/index.html
+++ b/en/chapter_appendix/index.html
@@ -4418,12 +4418,6 @@ aria-label="Footer"
 <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script>
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-          <button type="button" class="md-top md-icon" data-md-component="top" hidden>
-  
-  <svg xmlns="http://www.w3.org/2000/svg" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" class="lucide lucide-circle-arrow-up" viewBox="0 0 24 24"><circle cx="12" cy="12" r="10"/><path d="m16 12-4-4-4 4M12 16V8"/></svg>
-  Back to top
-</button>
-        
       </main>
       
         <footer class="md-footer">
@@ -4490,7 +4484,7 @@ aria-label="Footer"
     
       
       
-      <script id="__config" type="application/json">{"annotate":null,"base":"../","features":["content.action.edit","content.code.annotate","content.code.copy","content.tabs.link","content.tooltips","navigation.indexes","navigation.top","navigation.tracking","search.highlight","search.share","search.suggest","toc.follow"],"search":"../assets/javascripts/workers/search.e2d2d235.min.js","tags":null,"translations":{"clipboard.copied":"Copied to clipboard","clipboard.copy":"Copy to clipboard","search.result.more.one":"1 more on this page","search.result.more.other":"# more on this page","search.result.none":"No matching documents","search.result.one":"1 matching document","search.result.other":"# matching documents","search.result.placeholder":"Type to start searching","search.result.term.missing":"Missing","select.version":"Select version"},"version":null}</script>
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diff --git a/en/chapter_appendix/installation/index.html b/en/chapter_appendix/installation/index.html
index 649fea34d..f09f2420e 100644
--- a/en/chapter_appendix/installation/index.html
+++ b/en/chapter_appendix/installation/index.html
@@ -4789,12 +4789,6 @@ aria-label="Footer"
 <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script>
         </div>
         
-          <button type="button" class="md-top md-icon" data-md-component="top" hidden>
-  
-  <svg xmlns="http://www.w3.org/2000/svg" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" class="lucide lucide-circle-arrow-up" viewBox="0 0 24 24"><circle cx="12" cy="12" r="10"/><path d="m16 12-4-4-4 4M12 16V8"/></svg>
-  Back to top
-</button>
-        
       </main>
       
         <footer class="md-footer">
@@ -4861,7 +4855,7 @@ aria-label="Footer"
     
       
       
-      <script id="__config" type="application/json">{"annotate":null,"base":"../../","features":["content.action.edit","content.code.annotate","content.code.copy","content.tabs.link","content.tooltips","navigation.indexes","navigation.top","navigation.tracking","search.highlight","search.share","search.suggest","toc.follow"],"search":"../../assets/javascripts/workers/search.e2d2d235.min.js","tags":null,"translations":{"clipboard.copied":"Copied to clipboard","clipboard.copy":"Copy to clipboard","search.result.more.one":"1 more on this page","search.result.more.other":"# more on this page","search.result.none":"No matching documents","search.result.one":"1 matching document","search.result.other":"# matching documents","search.result.placeholder":"Type to start searching","search.result.term.missing":"Missing","select.version":"Select version"},"version":null}</script>
+      <script id="__config" type="application/json">{"annotate":null,"base":"../../","features":["content.action.edit","content.code.annotate","content.code.copy","content.tabs.link","content.tooltips","navigation.indexes","navigation.tracking","search.highlight","search.share","search.suggest","toc.follow"],"search":"../../assets/javascripts/workers/search.e2d2d235.min.js","tags":null,"translations":{"clipboard.copied":"Copied to clipboard","clipboard.copy":"Copy to clipboard","search.result.more.one":"1 more on this page","search.result.more.other":"# more on this page","search.result.none":"No matching documents","search.result.one":"1 matching document","search.result.other":"# matching documents","search.result.placeholder":"Type to start searching","search.result.term.missing":"Missing","select.version":"Select version"},"version":null}</script>
     
     
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diff --git a/en/chapter_appendix/terminology/index.html b/en/chapter_appendix/terminology/index.html
index a0d4d4c8d..648cdf1a1 100644
--- a/en/chapter_appendix/terminology/index.html
+++ b/en/chapter_appendix/terminology/index.html
@@ -5052,12 +5052,6 @@ aria-label="Footer"
 <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script>
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-          <button type="button" class="md-top md-icon" data-md-component="top" hidden>
-  
-  <svg xmlns="http://www.w3.org/2000/svg" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" class="lucide lucide-circle-arrow-up" viewBox="0 0 24 24"><circle cx="12" cy="12" r="10"/><path d="m16 12-4-4-4 4M12 16V8"/></svg>
-  Back to top
-</button>
-        
       </main>
       
         <footer class="md-footer">
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index 90729632c..336ae1a30 100644
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-  Back to top
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         <footer class="md-footer">
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-      <script id="__config" type="application/json">{"annotate":null,"base":"../../","features":["content.action.edit","content.code.annotate","content.code.copy","content.tabs.link","content.tooltips","navigation.indexes","navigation.top","navigation.tracking","search.highlight","search.share","search.suggest","toc.follow"],"search":"../../assets/javascripts/workers/search.e2d2d235.min.js","tags":null,"translations":{"clipboard.copied":"Copied to clipboard","clipboard.copy":"Copy to clipboard","search.result.more.one":"1 more on this page","search.result.more.other":"# more on this page","search.result.none":"No matching documents","search.result.one":"1 matching document","search.result.other":"# matching documents","search.result.placeholder":"Type to start searching","search.result.term.missing":"Missing","select.version":"Select version"},"version":null}</script>
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-  Back to top
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-  Back to top
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-        
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         <footer class="md-footer">
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         <footer class="md-footer">
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-      <script id="__config" type="application/json">{"annotate":null,"base":"../../","features":["content.action.edit","content.code.annotate","content.code.copy","content.tabs.link","content.tooltips","navigation.indexes","navigation.top","navigation.tracking","search.highlight","search.share","search.suggest","toc.follow"],"search":"../../assets/javascripts/workers/search.e2d2d235.min.js","tags":null,"translations":{"clipboard.copied":"Copied to clipboard","clipboard.copy":"Copy to clipboard","search.result.more.one":"1 more on this page","search.result.more.other":"# more on this page","search.result.none":"No matching documents","search.result.one":"1 matching document","search.result.other":"# matching documents","search.result.placeholder":"Type to start searching","search.result.term.missing":"Missing","select.version":"Select version"},"version":null}</script>
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index 65348348e..d6ea38577 100644
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--- a/en/chapter_tree/array_representation_of_tree/index.html
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-  Back to top
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-        
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         <footer class="md-footer">
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-  Back to top
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-        
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         <footer class="md-footer">
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index 41bb62b98..5474968ac 100644
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-  Back to top
-</button>
-        
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         <footer class="md-footer">
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-      <script id="__config" type="application/json">{"annotate":null,"base":"../../","features":["content.action.edit","content.code.annotate","content.code.copy","content.tabs.link","content.tooltips","navigation.indexes","navigation.top","navigation.tracking","search.highlight","search.share","search.suggest","toc.follow"],"search":"../../assets/javascripts/workers/search.e2d2d235.min.js","tags":null,"translations":{"clipboard.copied":"Copied to clipboard","clipboard.copy":"Copy to clipboard","search.result.more.one":"1 more on this page","search.result.more.other":"# more on this page","search.result.none":"No matching documents","search.result.one":"1 matching document","search.result.other":"# matching documents","search.result.placeholder":"Type to start searching","search.result.term.missing":"Missing","select.version":"Select version"},"version":null}</script>
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-  Back to top
-</button>
-        
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         <footer class="md-footer">
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diff --git a/en/chapter_tree/index.html b/en/chapter_tree/index.html
index 4fd751092..ca2fe1671 100644
--- a/en/chapter_tree/index.html
+++ b/en/chapter_tree/index.html
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-          <button type="button" class="md-top md-icon" data-md-component="top" hidden>
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@@ -4498,7 +4492,7 @@ aria-label="Footer"
     
       
       
-      <script id="__config" type="application/json">{"annotate":null,"base":"../","features":["content.action.edit","content.code.annotate","content.code.copy","content.tabs.link","content.tooltips","navigation.indexes","navigation.top","navigation.tracking","search.highlight","search.share","search.suggest","toc.follow"],"search":"../assets/javascripts/workers/search.e2d2d235.min.js","tags":null,"translations":{"clipboard.copied":"Copied to clipboard","clipboard.copy":"Copy to clipboard","search.result.more.one":"1 more on this page","search.result.more.other":"# more on this page","search.result.none":"No matching documents","search.result.one":"1 matching document","search.result.other":"# matching documents","search.result.placeholder":"Type to start searching","search.result.term.missing":"Missing","select.version":"Select version"},"version":null}</script>
+      <script id="__config" type="application/json">{"annotate":null,"base":"../","features":["content.action.edit","content.code.annotate","content.code.copy","content.tabs.link","content.tooltips","navigation.indexes","navigation.tracking","search.highlight","search.share","search.suggest","toc.follow"],"search":"../assets/javascripts/workers/search.e2d2d235.min.js","tags":null,"translations":{"clipboard.copied":"Copied to clipboard","clipboard.copy":"Copy to clipboard","search.result.more.one":"1 more on this page","search.result.more.other":"# more on this page","search.result.none":"No matching documents","search.result.one":"1 matching document","search.result.other":"# matching documents","search.result.placeholder":"Type to start searching","search.result.term.missing":"Missing","select.version":"Select version"},"version":null}</script>
     
     
       <script src="../assets/javascripts/bundle.c2b142ea.min.js"></script>
diff --git a/en/chapter_tree/summary/index.html b/en/chapter_tree/summary/index.html
index fe1e950bb..a918978a8 100644
--- a/en/chapter_tree/summary/index.html
+++ b/en/chapter_tree/summary/index.html
@@ -4528,12 +4528,6 @@ aria-label="Footer"
 <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script>
         </div>
         
-          <button type="button" class="md-top md-icon" data-md-component="top" hidden>
-  
-  <svg xmlns="http://www.w3.org/2000/svg" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" class="lucide lucide-circle-arrow-up" viewBox="0 0 24 24"><circle cx="12" cy="12" r="10"/><path d="m16 12-4-4-4 4M12 16V8"/></svg>
-  Back to top
-</button>
-        
       </main>
       
         <footer class="md-footer">
@@ -4600,7 +4594,7 @@ aria-label="Footer"
     
       
       
-      <script id="__config" type="application/json">{"annotate":null,"base":"../../","features":["content.action.edit","content.code.annotate","content.code.copy","content.tabs.link","content.tooltips","navigation.indexes","navigation.top","navigation.tracking","search.highlight","search.share","search.suggest","toc.follow"],"search":"../../assets/javascripts/workers/search.e2d2d235.min.js","tags":null,"translations":{"clipboard.copied":"Copied to clipboard","clipboard.copy":"Copy to clipboard","search.result.more.one":"1 more on this page","search.result.more.other":"# more on this page","search.result.none":"No matching documents","search.result.one":"1 matching document","search.result.other":"# matching documents","search.result.placeholder":"Type to start searching","search.result.term.missing":"Missing","select.version":"Select version"},"version":null}</script>
+      <script id="__config" type="application/json">{"annotate":null,"base":"../../","features":["content.action.edit","content.code.annotate","content.code.copy","content.tabs.link","content.tooltips","navigation.indexes","navigation.tracking","search.highlight","search.share","search.suggest","toc.follow"],"search":"../../assets/javascripts/workers/search.e2d2d235.min.js","tags":null,"translations":{"clipboard.copied":"Copied to clipboard","clipboard.copy":"Copy to clipboard","search.result.more.one":"1 more on this page","search.result.more.other":"# more on this page","search.result.none":"No matching documents","search.result.one":"1 matching document","search.result.other":"# matching documents","search.result.placeholder":"Type to start searching","search.result.term.missing":"Missing","select.version":"Select version"},"version":null}</script>
     
     
       <script src="../../assets/javascripts/bundle.c2b142ea.min.js"></script>
diff --git a/en/index.assets/animation.mp4 b/en/index.assets/animation.mp4
new file mode 100644
index 000000000..cf3838e79
Binary files /dev/null and b/en/index.assets/animation.mp4 differ
diff --git a/en/index.assets/comment.mp4 b/en/index.assets/comment.mp4
new file mode 100644
index 000000000..3f9ea340c
Binary files /dev/null and b/en/index.assets/comment.mp4 differ
diff --git a/en/index.assets/running_code.mp4 b/en/index.assets/running_code.mp4
new file mode 100644
index 000000000..c946fbd68
Binary files /dev/null and b/en/index.assets/running_code.mp4 differ
diff --git a/en/index.html b/en/index.html
index 55e3b35f2..5dddbe80a 100644
--- a/en/index.html
+++ b/en/index.html
@@ -356,10 +356,12 @@
                 </p>
               </div>
             </div>
-            <img alt="Animation example" class="intro-image" src="index.assets/animation.gif"/>
+            <video aria-label="Animation example" autoplay="" class="intro-image" loop="" muted="" playsinline="" src="index.assets/animation.mp4">
+            </video>
           </div>
           <div class="intro-container">
-            <img alt="Running code example" class="intro-image" src="index.assets/running_code.gif"/>
+            <video aria-label="Running code example" autoplay="" class="intro-image" loop="" muted="" playsinline="" src="index.assets/running_code.mp4">
+            </video>
             <div class="intro-text">
               <div>
                 <div style="display: flex; align-items: center;">
@@ -400,7 +402,8 @@
                 </p>
               </div>
             </div>
-            <img alt="Comments example" class="intro-image" src="index.assets/comment.gif"/>
+            <video aria-label="Comments example" autoplay="" class="intro-image" loop="" muted="" playsinline="" src="index.assets/comment.mp4">
+            </video>
           </div>
         </div>
       </section>
@@ -1869,15 +1872,6 @@
             var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))
           </script>
         </div>
-        <button class="md-top md-icon" data-md-component="top" hidden="" type="button">
-          <svg class="lucide lucide-circle-arrow-up" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" viewbox="0 0 24 24" xmlns="http://www.w3.org/2000/svg">
-            <circle cx="12" cy="12" r="10">
-            </circle>
-            <path d="m16 12-4-4-4 4M12 16V8">
-            </path>
-          </svg>
-          Back to top
-        </button>
       </main>
       <footer class="md-footer">
         <div class="md-footer-meta md-typeset">
@@ -1924,7 +1918,7 @@
       </div>
     </div>
     <script id="__config" type="application/json">
-      {"annotate":null,"base":"./","features":["content.action.edit","content.code.annotate","content.code.copy","content.tabs.link","content.tooltips","navigation.indexes","navigation.top","navigation.tracking","search.highlight","search.share","search.suggest","toc.follow"],"search":"./assets/javascripts/workers/search.e2d2d235.min.js","tags":null,"translations":{"clipboard.copied":"Copied to clipboard","clipboard.copy":"Copy to clipboard","search.result.more.one":"1 more on this page","search.result.more.other":"# more on this page","search.result.none":"No matching documents","search.result.one":"1 matching document","search.result.other":"# matching documents","search.result.placeholder":"Type to start searching","search.result.term.missing":"Missing","select.version":"Select version"},"version":null}
+      {"annotate":null,"base":"./","features":["content.action.edit","content.code.annotate","content.code.copy","content.tabs.link","content.tooltips","navigation.indexes","navigation.tracking","search.highlight","search.share","search.suggest","toc.follow"],"search":"./assets/javascripts/workers/search.e2d2d235.min.js","tags":null,"translations":{"clipboard.copied":"Copied to clipboard","clipboard.copy":"Copy to clipboard","search.result.more.one":"1 more on this page","search.result.more.other":"# more on this page","search.result.none":"No matching documents","search.result.one":"1 matching document","search.result.other":"# matching documents","search.result.placeholder":"Type to start searching","search.result.term.missing":"Missing","select.version":"Select version"},"version":null}
     </script>
     <script src="./assets/javascripts/bundle.c2b142ea.min.js">
     </script>
diff --git a/en/javascripts/animation_player.js b/en/javascripts/animation_player.js
index 8a6d650a3..4e90ce76c 100644
--- a/en/javascripts/animation_player.js
+++ b/en/javascripts/animation_player.js
@@ -251,4 +251,4 @@
     initAutoSlide();
   }
 })();
-/*! update cache: 20260331211906 */
+/*! update cache: 20260331235009 */
diff --git a/en/javascripts/katex.js b/en/javascripts/katex.js
index 1bad1eb73..dc880d915 100644
--- a/en/javascripts/katex.js
+++ b/en/javascripts/katex.js
@@ -8,4 +8,4 @@ document$.subscribe(({ body }) => {
     ],
   });
 });
-/*! update cache: 20260331211906 */
+/*! update cache: 20260331235009 */
diff --git a/en/javascripts/mathjax.js b/en/javascripts/mathjax.js
index 43163f32a..eb10d6fa6 100644
--- a/en/javascripts/mathjax.js
+++ b/en/javascripts/mathjax.js
@@ -15,4 +15,4 @@ window.MathJax = {
 document$.subscribe(() => {
   MathJax.typesetPromise();
 });
-/*! update cache: 20260331211906 */
+/*! update cache: 20260331235009 */
diff --git a/en/javascripts/starfield.js b/en/javascripts/starfield.js
index 803eda9fb..02bd860b0 100644
--- a/en/javascripts/starfield.js
+++ b/en/javascripts/starfield.js
@@ -469,4 +469,4 @@
 
   return Starfield;
 });
-/*! update cache: 20260331211906 */
+/*! update cache: 20260331235009 */
diff --git a/en/stylesheets/animation_player.css b/en/stylesheets/animation_player.css
index 27373f864..486e20eac 100644
--- a/en/stylesheets/animation_player.css
+++ b/en/stylesheets/animation_player.css
@@ -176,4 +176,4 @@
     font-size: 0.7rem;
   }
 }
-/*! update cache: 20260331211906 */
+/*! update cache: 20260331235009 */
diff --git a/en/stylesheets/extra.css b/en/stylesheets/extra.css
index c2abe7f63..bb2f039b0 100644
--- a/en/stylesheets/extra.css
+++ b/en/stylesheets/extra.css
@@ -573,7 +573,7 @@ a:hover .device-on-hover {
 }
 
 .intro-text svg path {
-  fill: #3b3b3b;
+  fill: var(--md-primary-bg-color);
 }
 
 .endor-text {
@@ -713,4 +713,4 @@ a:hover .device-on-hover {
     flex: 1 1 30%;
   }
 }
-/*! update cache: 20260331211906 */
+/*! update cache: 20260331235009 */
diff --git a/index.assets/animation.mp4 b/index.assets/animation.mp4
new file mode 100644
index 000000000..cf3838e79
Binary files /dev/null and b/index.assets/animation.mp4 differ
diff --git a/index.assets/comment.mp4 b/index.assets/comment.mp4
new file mode 100644
index 000000000..3f9ea340c
Binary files /dev/null and b/index.assets/comment.mp4 differ
diff --git a/index.assets/running_code.mp4 b/index.assets/running_code.mp4
new file mode 100644
index 000000000..c946fbd68
Binary files /dev/null and b/index.assets/running_code.mp4 differ
diff --git a/index.html b/index.html
index 29cd4934e..2d4893b60 100644
--- a/index.html
+++ b/index.html
@@ -358,10 +358,12 @@
                 </p>
               </div>
             </div>
-            <img alt="Animation example" class="intro-image" src="index.assets/animation.gif"/>
+            <video aria-label="Animation example" autoplay="" class="intro-image" loop="" muted="" playsinline="" src="index.assets/animation.mp4">
+            </video>
           </div>
           <div class="intro-container">
-            <img alt="Running code example" class="intro-image" src="index.assets/running_code.gif"/>
+            <video aria-label="Running code example" autoplay="" class="intro-image" loop="" muted="" playsinline="" src="index.assets/running_code.mp4">
+            </video>
             <div class="intro-text">
               <div>
                 <div style="display: flex; align-items: center;">
@@ -406,7 +408,8 @@
                 </p>
               </div>
             </div>
-            <img alt="Comments example" class="intro-image" src="index.assets/comment.gif"/>
+            <video aria-label="Comments example" autoplay="" class="intro-image" loop="" muted="" playsinline="" src="index.assets/comment.mp4">
+            </video>
           </div>
         </div>
       </section>
@@ -1800,15 +1803,6 @@
             var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))
           </script>
         </div>
-        <button class="md-top md-icon" data-md-component="top" hidden="" type="button">
-          <svg class="lucide lucide-circle-arrow-up" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" viewbox="0 0 24 24" xmlns="http://www.w3.org/2000/svg">
-            <circle cx="12" cy="12" r="10">
-            </circle>
-            <path d="m16 12-4-4-4 4M12 16V8">
-            </path>
-          </svg>
-          回到页面顶部
-        </button>
       </main>
       <footer class="md-footer">
         <div class="md-footer-meta md-typeset">
@@ -1855,7 +1849,7 @@
       </div>
     </div>
     <script id="__config" type="application/json">
-      {"annotate":null,"base":"./","features":["content.action.edit","content.code.annotate","content.code.copy","content.tabs.link","content.tooltips","navigation.indexes","navigation.top","navigation.tracking","search.highlight","search.share","search.suggest","toc.follow"],"search":"./assets/javascripts/workers/search.e2d2d235.min.js","tags":null,"translations":{"clipboard.copied":"已复制","clipboard.copy":"复制","search.result.more.one":"在该页上还有 1 个符合条件的结果","search.result.more.other":"在该页上还有 # 个符合条件的结果","search.result.none":"没有找到符合条件的结果","search.result.one":"找到 1 个符合条件的结果","search.result.other":"# 个符合条件的结果","search.result.placeholder":"键入以开始搜索","search.result.term.missing":"缺少","select.version":"选择当前版本"},"version":null}
+      {"annotate":null,"base":"./","features":["content.action.edit","content.code.annotate","content.code.copy","content.tabs.link","content.tooltips","navigation.indexes","navigation.tracking","search.highlight","search.share","search.suggest","toc.follow"],"search":"./assets/javascripts/workers/search.e2d2d235.min.js","tags":null,"translations":{"clipboard.copied":"已复制","clipboard.copy":"复制","search.result.more.one":"在该页上还有 1 个符合条件的结果","search.result.more.other":"在该页上还有 # 个符合条件的结果","search.result.none":"没有找到符合条件的结果","search.result.one":"找到 1 个符合条件的结果","search.result.other":"# 个符合条件的结果","search.result.placeholder":"键入以开始搜索","search.result.term.missing":"缺少","select.version":"选择当前版本"},"version":null}
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     <script src="./assets/javascripts/bundle.c2b142ea.min.js">
     </script>
diff --git a/ja/404.html b/ja/404.html
index 4f9b43921..f6276e442 100644
--- a/ja/404.html
+++ b/ja/404.html
@@ -4232,12 +4232,6 @@
 <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script>
         </div>
         
-          <button type="button" class="md-top md-icon" data-md-component="top" hidden>
-  
-  <svg xmlns="http://www.w3.org/2000/svg" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" class="lucide lucide-circle-arrow-up" viewBox="0 0 24 24"><circle cx="12" cy="12" r="10"/><path d="m16 12-4-4-4 4M12 16V8"/></svg>
-  ページトップへ戻る
-</button>
-        
       </main>
       
         <footer class="md-footer">
@@ -4304,7 +4298,7 @@
     
       
       
-      <script id="__config" type="application/json">{"annotate":null,"base":"/ja/","features":["content.action.edit","content.code.annotate","content.code.copy","content.tabs.link","content.tooltips","navigation.indexes","navigation.top","navigation.tracking","search.highlight","search.share","search.suggest","toc.follow"],"search":"/ja/assets/javascripts/workers/search.e2d2d235.min.js","tags":null,"translations":{"clipboard.copied":"コピーしました","clipboard.copy":"クリップボードへコピー","search.result.more.one":"このページ内にもう1件見つかりました","search.result.more.other":"このページ内にあと#件見つかりました","search.result.none":"何も見つかりませんでした","search.result.one":"1件見つかりました","search.result.other":"#件見つかりました","search.result.placeholder":"検索キーワードを入力してください","search.result.term.missing":"検索に含まれない","select.version":"バージョン切り替え"},"version":null}</script>
+      <script id="__config" type="application/json">{"annotate":null,"base":"/ja/","features":["content.action.edit","content.code.annotate","content.code.copy","content.tabs.link","content.tooltips","navigation.indexes","navigation.tracking","search.highlight","search.share","search.suggest","toc.follow"],"search":"/ja/assets/javascripts/workers/search.e2d2d235.min.js","tags":null,"translations":{"clipboard.copied":"コピーしました","clipboard.copy":"クリップボードへコピー","search.result.more.one":"このページ内にもう1件見つかりました","search.result.more.other":"このページ内にあと#件見つかりました","search.result.none":"何も見つかりませんでした","search.result.one":"1件見つかりました","search.result.other":"#件見つかりました","search.result.placeholder":"検索キーワードを入力してください","search.result.term.missing":"検索に含まれない","select.version":"バージョン切り替え"},"version":null}</script>
     
     
       <script src="/ja/assets/javascripts/bundle.c2b142ea.min.js"></script>
diff --git a/ja/assets/javascripts/bundle.c2b142ea.min.js b/ja/assets/javascripts/bundle.c2b142ea.min.js
index 27ee64865..473380e5a 100644
--- a/ja/assets/javascripts/bundle.c2b142ea.min.js
+++ b/ja/assets/javascripts/bundle.c2b142ea.min.js
@@ -1,4 +1,4 @@
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rect{fill:var(--md-mermaid-edge-color)!important;stroke:none!important}.statediagram-cluster.statediagram-cluster .inner{fill:var(--md-default-bg-color)}.statediagram-cluster rect{fill:var(--md-mermaid-node-bg-color);stroke:var(--md-mermaid-node-fg-color)}.statediagram-state rect.divider{fill:var(--md-default-fg-color--lightest);stroke:var(--md-default-fg-color--lighter)}defs #statediagram-barbEnd{stroke:var(--md-mermaid-edge-color)}[id^=entity] path,[id^=entity] rect{fill:var(--md-default-bg-color)}.relationshipLine{stroke:var(--md-mermaid-edge-color)}defs .marker.oneOrMore.er *,defs .marker.onlyOne.er *,defs .marker.zeroOrMore.er *,defs .marker.zeroOrOne.er 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t.pipe(g(r=>R(Y(!0),Y(!1).pipe(It(2e3))).pipe(f(n=>({message:r,active:n})))))}function Fs(e,t){let r=G(".md-typeset",e);return j(()=>{let n=new I;return n.subscribe(({message:o,active:i})=>{e.classList.toggle("md-dialog--active",i),r.textContent=o}),dp(e,t).pipe($(o=>n.next(o)),V(()=>n.complete()),f(o=>H({ref:e},o)))})}function hp({viewport$:e}){if(!X("header.autohide"))return Y(!1);let t=e.pipe(f(({offset:{y:o}})=>o),Pt(2,1),f(([o,i])=>[o<i,i]),fe(0)),r=re([e,t]).pipe(L(([{offset:o},[,i]])=>Math.abs(i-o.y)>100),f(([,[o]])=>o),ie()),n=Tn("search");return re([e,n]).pipe(f(([{offset:o},i])=>o.y>400&&!i),ie(),g(o=>o?r:Y(!1)),J(!1))}function Us(e,t){return j(()=>re([Re(e),hp(t)])).pipe(f(([{height:r},n])=>({height:r,hidden:n})),ie((r,n)=>r.height===n.height&&r.hidden===n.hidden),se(1))}function Ns(e,{viewport$:t,header$:r,main$:n}){return j(()=>{let o=new 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re([n,o,t]).pipe(f(([i,{top:a,bottom:s},{offset:{y:c},size:{height:l}}])=>(l=Math.max(0,l-Math.max(0,a-c,i)-Math.max(0,l+c-s)),{offset:a-i,height:l,active:a-i<=c})),ie((i,a)=>i.offset===a.offset&&i.height===a.height&&i.active===a.active))}function bp(e){let t=__md_get("__palette")||{index:e.findIndex(n=>matchMedia(n.getAttribute("data-md-color-media")).matches)},r=Math.max(0,Math.min(t.index,e.length-1));return Y(...e).pipe(oe(n=>b(n,"change").pipe(f(()=>n))),J(e[r]),f(n=>({index:e.indexOf(n),color:{media:n.getAttribute("data-md-color-media"),scheme:n.getAttribute("data-md-color-scheme"),primary:n.getAttribute("data-md-color-primary"),accent:n.getAttribute("data-md-color-accent")}})),se(1))}function Vs(e){let t=P("input",e),r=A("meta",{name:"theme-color"});document.head.appendChild(r);let n=A("meta",{name:"color-scheme"});document.head.appendChild(n);let o=Ir("(prefers-color-scheme: light)");return j(()=>{let i=new I;return 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index e528b629b..9ebe1a823 100644
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-  <svg xmlns="http://www.w3.org/2000/svg" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" class="lucide lucide-circle-arrow-up" viewBox="0 0 24 24"><circle cx="12" cy="12" r="10"/><path d="m16 12-4-4-4 4M12 16V8"/></svg>
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         <footer class="md-footer">
@@ -4490,7 +4484,7 @@ aria-label="フッター"
     
       
       
-      <script id="__config" type="application/json">{"annotate":null,"base":"../","features":["content.action.edit","content.code.annotate","content.code.copy","content.tabs.link","content.tooltips","navigation.indexes","navigation.top","navigation.tracking","search.highlight","search.share","search.suggest","toc.follow"],"search":"../assets/javascripts/workers/search.e2d2d235.min.js","tags":null,"translations":{"clipboard.copied":"コピーしました","clipboard.copy":"クリップボードへコピー","search.result.more.one":"このページ内にもう1件見つかりました","search.result.more.other":"このページ内にあと#件見つかりました","search.result.none":"何も見つかりませんでした","search.result.one":"1件見つかりました","search.result.other":"#件見つかりました","search.result.placeholder":"検索キーワードを入力してください","search.result.term.missing":"検索に含まれない","select.version":"バージョン切り替え"},"version":null}</script>
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diff --git a/ja/chapter_appendix/installation/index.html b/ja/chapter_appendix/installation/index.html
index 115a1effe..e00c27990 100644
--- a/ja/chapter_appendix/installation/index.html
+++ b/ja/chapter_appendix/installation/index.html
@@ -4789,12 +4789,6 @@ aria-label="フッター"
 <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script>
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-          <button type="button" class="md-top md-icon" data-md-component="top" hidden>
-  
-  <svg xmlns="http://www.w3.org/2000/svg" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" class="lucide lucide-circle-arrow-up" viewBox="0 0 24 24"><circle cx="12" cy="12" r="10"/><path d="m16 12-4-4-4 4M12 16V8"/></svg>
-  ページトップへ戻る
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         <footer class="md-footer">
@@ -4861,7 +4855,7 @@ aria-label="フッター"
     
       
       
-      <script id="__config" type="application/json">{"annotate":null,"base":"../../","features":["content.action.edit","content.code.annotate","content.code.copy","content.tabs.link","content.tooltips","navigation.indexes","navigation.top","navigation.tracking","search.highlight","search.share","search.suggest","toc.follow"],"search":"../../assets/javascripts/workers/search.e2d2d235.min.js","tags":null,"translations":{"clipboard.copied":"コピーしました","clipboard.copy":"クリップボードへコピー","search.result.more.one":"このページ内にもう1件見つかりました","search.result.more.other":"このページ内にあと#件見つかりました","search.result.none":"何も見つかりませんでした","search.result.one":"1件見つかりました","search.result.other":"#件見つかりました","search.result.placeholder":"検索キーワードを入力してください","search.result.term.missing":"検索に含まれない","select.version":"バージョン切り替え"},"version":null}</script>
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index 413453b25..0e1311152 100644
--- a/ja/chapter_appendix/terminology/index.html
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-  
-  <svg xmlns="http://www.w3.org/2000/svg" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" class="lucide lucide-circle-arrow-up" viewBox="0 0 24 24"><circle cx="12" cy="12" r="10"/><path d="m16 12-4-4-4 4M12 16V8"/></svg>
-  ページトップへ戻る
-</button>
-        
       </main>
       
         <footer class="md-footer">
@@ -5124,7 +5118,7 @@ aria-label="フッター"
     
       
       
-      <script id="__config" type="application/json">{"annotate":null,"base":"../../","features":["content.action.edit","content.code.annotate","content.code.copy","content.tabs.link","content.tooltips","navigation.indexes","navigation.top","navigation.tracking","search.highlight","search.share","search.suggest","toc.follow"],"search":"../../assets/javascripts/workers/search.e2d2d235.min.js","tags":null,"translations":{"clipboard.copied":"コピーしました","clipboard.copy":"クリップボードへコピー","search.result.more.one":"このページ内にもう1件見つかりました","search.result.more.other":"このページ内にあと#件見つかりました","search.result.none":"何も見つかりませんでした","search.result.one":"1件見つかりました","search.result.other":"#件見つかりました","search.result.placeholder":"検索キーワードを入力してください","search.result.term.missing":"検索に含まれない","select.version":"バージョン切り替え"},"version":null}</script>
+      <script id="__config" type="application/json">{"annotate":null,"base":"../../","features":["content.action.edit","content.code.annotate","content.code.copy","content.tabs.link","content.tooltips","navigation.indexes","navigation.tracking","search.highlight","search.share","search.suggest","toc.follow"],"search":"../../assets/javascripts/workers/search.e2d2d235.min.js","tags":null,"translations":{"clipboard.copied":"コピーしました","clipboard.copy":"クリップボードへコピー","search.result.more.one":"このページ内にもう1件見つかりました","search.result.more.other":"このページ内にあと#件見つかりました","search.result.none":"何も見つかりませんでした","search.result.one":"1件見つかりました","search.result.other":"#件見つかりました","search.result.placeholder":"検索キーワードを入力してください","search.result.term.missing":"検索に含まれない","select.version":"バージョン切り替え"},"version":null}</script>
     
     
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index 9898d55ff..8c1606b5d 100644
--- a/ja/chapter_array_and_linkedlist/array/index.html
+++ b/ja/chapter_array_and_linkedlist/array/index.html
@@ -5865,12 +5865,6 @@ aria-label="フッター"
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-          <button type="button" class="md-top md-icon" data-md-component="top" hidden>
-  
-  <svg xmlns="http://www.w3.org/2000/svg" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" class="lucide lucide-circle-arrow-up" viewBox="0 0 24 24"><circle cx="12" cy="12" r="10"/><path d="m16 12-4-4-4 4M12 16V8"/></svg>
-  ページトップへ戻る
-</button>
-        
       </main>
       
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-      <script id="__config" type="application/json">{"annotate":null,"base":"../../","features":["content.action.edit","content.code.annotate","content.code.copy","content.tabs.link","content.tooltips","navigation.indexes","navigation.top","navigation.tracking","search.highlight","search.share","search.suggest","toc.follow"],"search":"../../assets/javascripts/workers/search.e2d2d235.min.js","tags":null,"translations":{"clipboard.copied":"コピーしました","clipboard.copy":"クリップボードへコピー","search.result.more.one":"このページ内にもう1件見つかりました","search.result.more.other":"このページ内にあと#件見つかりました","search.result.none":"何も見つかりませんでした","search.result.one":"1件見つかりました","search.result.other":"#件見つかりました","search.result.placeholder":"検索キーワードを入力してください","search.result.term.missing":"検索に含まれない","select.version":"バージョン切り替え"},"version":null}</script>
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diff --git a/ja/chapter_stack_and_queue/summary/index.html b/ja/chapter_stack_and_queue/summary/index.html
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diff --git a/ja/chapter_tree/index.html b/ja/chapter_tree/index.html
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diff --git a/ja/index.assets/running_code.mp4 b/ja/index.assets/running_code.mp4
new file mode 100644
index 000000000..c946fbd68
Binary files /dev/null and b/ja/index.assets/running_code.mp4 differ
diff --git a/ja/index.html b/ja/index.html
index f6666a4ea..8e529fbe5 100644
--- a/ja/index.html
+++ b/ja/index.html
@@ -358,10 +358,12 @@
                 </p>
               </div>
             </div>
-            <img alt="Animation example" class="intro-image" src="index.assets/animation.gif"/>
+            <video aria-label="Animation example" autoplay="" class="intro-image" loop="" muted="" playsinline="" src="index.assets/animation.mp4">
+            </video>
           </div>
           <div class="intro-container">
-            <img alt="Running code example" class="intro-image" src="index.assets/running_code.gif"/>
+            <video aria-label="Running code example" autoplay="" class="intro-image" loop="" muted="" playsinline="" src="index.assets/running_code.mp4">
+            </video>
             <div class="intro-text">
               <div>
                 <div style="display: flex; align-items: center;">
@@ -406,7 +408,8 @@
                 </p>
               </div>
             </div>
-            <img alt="Comments example" class="intro-image" src="index.assets/comment.gif"/>
+            <video aria-label="Comments example" autoplay="" class="intro-image" loop="" muted="" playsinline="" src="index.assets/comment.mp4">
+            </video>
           </div>
         </div>
       </section>
@@ -1794,15 +1797,6 @@
             var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))
           </script>
         </div>
-        <button class="md-top md-icon" data-md-component="top" hidden="" type="button">
-          <svg class="lucide lucide-circle-arrow-up" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" viewbox="0 0 24 24" xmlns="http://www.w3.org/2000/svg">
-            <circle cx="12" cy="12" r="10">
-            </circle>
-            <path d="m16 12-4-4-4 4M12 16V8">
-            </path>
-          </svg>
-          ページトップへ戻る
-        </button>
       </main>
       <footer class="md-footer">
         <div class="md-footer-meta md-typeset">
@@ -1849,7 +1843,7 @@
       </div>
     </div>
     <script id="__config" type="application/json">
-      {"annotate":null,"base":"./","features":["content.action.edit","content.code.annotate","content.code.copy","content.tabs.link","content.tooltips","navigation.indexes","navigation.top","navigation.tracking","search.highlight","search.share","search.suggest","toc.follow"],"search":"./assets/javascripts/workers/search.e2d2d235.min.js","tags":null,"translations":{"clipboard.copied":"コピーしました","clipboard.copy":"クリップボードへコピー","search.result.more.one":"このページ内にもう1件見つかりました","search.result.more.other":"このページ内にあと#件見つかりました","search.result.none":"何も見つかりませんでした","search.result.one":"1件見つかりました","search.result.other":"#件見つかりました","search.result.placeholder":"検索キーワードを入力してください","search.result.term.missing":"検索に含まれない","select.version":"バージョン切り替え"},"version":null}
+      {"annotate":null,"base":"./","features":["content.action.edit","content.code.annotate","content.code.copy","content.tabs.link","content.tooltips","navigation.indexes","navigation.tracking","search.highlight","search.share","search.suggest","toc.follow"],"search":"./assets/javascripts/workers/search.e2d2d235.min.js","tags":null,"translations":{"clipboard.copied":"コピーしました","clipboard.copy":"クリップボードへコピー","search.result.more.one":"このページ内にもう1件見つかりました","search.result.more.other":"このページ内にあと#件見つかりました","search.result.none":"何も見つかりませんでした","search.result.one":"1件見つかりました","search.result.other":"#件見つかりました","search.result.placeholder":"検索キーワードを入力してください","search.result.term.missing":"検索に含まれない","select.version":"バージョン切り替え"},"version":null}
     </script>
     <script src="./assets/javascripts/bundle.c2b142ea.min.js">
     </script>
diff --git a/ja/javascripts/animation_player.js b/ja/javascripts/animation_player.js
index 2b0fb6217..7bd9ea297 100644
--- a/ja/javascripts/animation_player.js
+++ b/ja/javascripts/animation_player.js
@@ -251,4 +251,4 @@
     initAutoSlide();
   }
 })();
-/*! update cache: 20260331211918 */
+/*! update cache: 20260331235020 */
diff --git a/ja/javascripts/katex.js b/ja/javascripts/katex.js
index 34e09f904..2143d5863 100644
--- a/ja/javascripts/katex.js
+++ b/ja/javascripts/katex.js
@@ -8,4 +8,4 @@ document$.subscribe(({ body }) => {
     ],
   });
 });
-/*! update cache: 20260331211918 */
+/*! update cache: 20260331235020 */
diff --git a/ja/javascripts/mathjax.js b/ja/javascripts/mathjax.js
index 81395338a..c00489bb5 100644
--- a/ja/javascripts/mathjax.js
+++ b/ja/javascripts/mathjax.js
@@ -15,4 +15,4 @@ window.MathJax = {
 document$.subscribe(() => {
   MathJax.typesetPromise();
 });
-/*! update cache: 20260331211918 */
+/*! update cache: 20260331235020 */
diff --git a/ja/javascripts/starfield.js b/ja/javascripts/starfield.js
index d288d455e..e6b44f145 100644
--- a/ja/javascripts/starfield.js
+++ b/ja/javascripts/starfield.js
@@ -469,4 +469,4 @@
 
   return Starfield;
 });
-/*! update cache: 20260331211918 */
+/*! update cache: 20260331235020 */
diff --git a/ja/stylesheets/animation_player.css b/ja/stylesheets/animation_player.css
index c98bbf409..29757a7bd 100644
--- a/ja/stylesheets/animation_player.css
+++ b/ja/stylesheets/animation_player.css
@@ -176,4 +176,4 @@
     font-size: 0.7rem;
   }
 }
-/*! update cache: 20260331211918 */
+/*! update cache: 20260331235020 */
diff --git a/ja/stylesheets/extra.css b/ja/stylesheets/extra.css
index 4e6e4c0ad..51fd5bade 100644
--- a/ja/stylesheets/extra.css
+++ b/ja/stylesheets/extra.css
@@ -573,7 +573,7 @@ a:hover .device-on-hover {
 }
 
 .intro-text svg path {
-  fill: #3b3b3b;
+  fill: var(--md-primary-bg-color);
 }
 
 .endor-text {
@@ -713,4 +713,4 @@ a:hover .device-on-hover {
     flex: 1 1 30%;
   }
 }
-/*! update cache: 20260331211918 */
+/*! update cache: 20260331235020 */
diff --git a/javascripts/animation_player.js b/javascripts/animation_player.js
index e4ec0d395..15f6667f9 100644
--- a/javascripts/animation_player.js
+++ b/javascripts/animation_player.js
@@ -251,4 +251,4 @@
     initAutoSlide();
   }
 })();
-/*! update cache: 20260331211843 */
+/*! update cache: 20260331234946 */
diff --git a/javascripts/katex.js b/javascripts/katex.js
index 07f2d2504..e86545c57 100644
--- a/javascripts/katex.js
+++ b/javascripts/katex.js
@@ -8,4 +8,4 @@ document$.subscribe(({ body }) => {
     ],
   });
 });
-/*! update cache: 20260331211843 */
+/*! update cache: 20260331234946 */
diff --git a/javascripts/mathjax.js b/javascripts/mathjax.js
index 9d36c75b2..fd852c4f1 100644
--- a/javascripts/mathjax.js
+++ b/javascripts/mathjax.js
@@ -15,4 +15,4 @@ window.MathJax = {
 document$.subscribe(() => {
   MathJax.typesetPromise();
 });
-/*! update cache: 20260331211843 */
+/*! update cache: 20260331234946 */
diff --git a/javascripts/starfield.js b/javascripts/starfield.js
index 6e47ccf57..a29677f67 100644
--- a/javascripts/starfield.js
+++ b/javascripts/starfield.js
@@ -469,4 +469,4 @@
 
   return Starfield;
 });
-/*! update cache: 20260331211843 */
+/*! update cache: 20260331234946 */
diff --git a/ru/404.html b/ru/404.html
index f206d4180..c9297dc8b 100644
--- a/ru/404.html
+++ b/ru/404.html
@@ -4232,12 +4232,6 @@
 <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script>
         </div>
         
-          <button type="button" class="md-top md-icon" data-md-component="top" hidden>
-  
-  <svg xmlns="http://www.w3.org/2000/svg" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" class="lucide lucide-circle-arrow-up" viewBox="0 0 24 24"><circle cx="12" cy="12" r="10"/><path d="m16 12-4-4-4 4M12 16V8"/></svg>
-  К началу
-</button>
-        
       </main>
       
         <footer class="md-footer">
@@ -4304,7 +4298,7 @@
     
       
       
-      <script id="__config" type="application/json">{"annotate":null,"base":"/ru/","features":["content.action.edit","content.code.annotate","content.code.copy","content.tabs.link","content.tooltips","navigation.indexes","navigation.top","navigation.tracking","search.highlight","search.share","search.suggest","toc.follow"],"search":"/ru/assets/javascripts/workers/search.e2d2d235.min.js","tags":null,"translations":{"clipboard.copied":"Скопировано в буфер","clipboard.copy":"Копировать в буфер","search.result.more.one":"Ещё 1 на этой странице","search.result.more.other":"Ещё # на этой странице","search.result.none":"Совпадений не найдено","search.result.one":"Найдено 1 совпадение","search.result.other":"Найдено совпадений: #","search.result.placeholder":"Начните печатать для поиска","search.result.term.missing":"Отсутствует","select.version":"Выберите версию"},"version":null}</script>
+      <script id="__config" type="application/json">{"annotate":null,"base":"/ru/","features":["content.action.edit","content.code.annotate","content.code.copy","content.tabs.link","content.tooltips","navigation.indexes","navigation.tracking","search.highlight","search.share","search.suggest","toc.follow"],"search":"/ru/assets/javascripts/workers/search.e2d2d235.min.js","tags":null,"translations":{"clipboard.copied":"Скопировано в буфер","clipboard.copy":"Копировать в буфер","search.result.more.one":"Ещё 1 на этой странице","search.result.more.other":"Ещё # на этой странице","search.result.none":"Совпадений не найдено","search.result.one":"Найдено 1 совпадение","search.result.other":"Найдено совпадений: #","search.result.placeholder":"Начните печатать для поиска","search.result.term.missing":"Отсутствует","select.version":"Выберите версию"},"version":null}</script>
     
     
       <script src="/ru/assets/javascripts/bundle.c2b142ea.min.js"></script>
diff --git a/ru/assets/javascripts/bundle.c2b142ea.min.js b/ru/assets/javascripts/bundle.c2b142ea.min.js
index fb474eeed..c3799da36 100644
--- a/ru/assets/javascripts/bundle.c2b142ea.min.js
+++ b/ru/assets/javascripts/bundle.c2b142ea.min.js
@@ -1,4 +1,4 @@
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#flowchart-pointStart{stroke:none}.classDiagramTitleText{fill:var(--md-mermaid-label-fg-color)}g.classGroup line,g.classGroup rect{fill:var(--md-mermaid-node-bg-color);stroke:var(--md-mermaid-node-fg-color)}g.classGroup text{fill:var(--md-mermaid-label-fg-color);font-family:var(--md-mermaid-font-family)}.classLabel .box{fill:var(--md-mermaid-label-bg-color);background-color:var(--md-mermaid-label-bg-color);opacity:1}.classLabel .label{fill:var(--md-mermaid-label-fg-color);font-family:var(--md-mermaid-font-family)}.node .divider{stroke:var(--md-mermaid-node-fg-color)}.relation{stroke:var(--md-mermaid-edge-color)}.cardinality{fill:var(--md-mermaid-label-fg-color);font-family:var(--md-mermaid-font-family)}.cardinality text{fill:inherit!important}defs marker.marker.composition.class path,defs marker.marker.dependency.class path,defs marker.marker.extension.class path{fill:var(--md-mermaid-edge-color)!important;stroke:var(--md-mermaid-edge-color)!important}defs marker.marker.aggregation.class path{fill:var(--md-mermaid-label-bg-color)!important;stroke:var(--md-mermaid-edge-color)!important}.statediagramTitleText{fill:var(--md-mermaid-label-fg-color)}g.stateGroup rect{fill:var(--md-mermaid-node-bg-color);stroke:var(--md-mermaid-node-fg-color)}g.stateGroup .state-title{fill:var(--md-mermaid-label-fg-color)!important;font-family:var(--md-mermaid-font-family)}g.stateGroup .composit{fill:var(--md-mermaid-label-bg-color)}.nodeLabel,.nodeLabel p{color:var(--md-mermaid-label-fg-color);font-family:var(--md-mermaid-font-family)}a .nodeLabel{text-decoration:underline}.node circle.state-end,.node circle.state-start,.start-state{fill:var(--md-mermaid-edge-color);stroke:none}.end-state-inner,.end-state-outer{fill:var(--md-mermaid-edge-color)}.end-state-inner,.node circle.state-end{stroke:var(--md-mermaid-label-bg-color)}.transition{stroke:var(--md-mermaid-edge-color)}[id^=state-fork] rect,[id^=state-join] rect{fill:var(--md-mermaid-edge-color)!important;stroke:none!important}.statediagram-cluster.statediagram-cluster .inner{fill:var(--md-default-bg-color)}.statediagram-cluster rect{fill:var(--md-mermaid-node-bg-color);stroke:var(--md-mermaid-node-fg-color)}.statediagram-state rect.divider{fill:var(--md-default-fg-color--lightest);stroke:var(--md-default-fg-color--lighter)}defs #statediagram-barbEnd{stroke:var(--md-mermaid-edge-color)}[id^=entity] path,[id^=entity] rect{fill:var(--md-default-bg-color)}.relationshipLine{stroke:var(--md-mermaid-edge-color)}defs .marker.oneOrMore.er *,defs .marker.onlyOne.er *,defs .marker.zeroOrMore.er *,defs .marker.zeroOrOne.er *{stroke:var(--md-mermaid-edge-color)!important}text:not([class]):last-child{fill:var(--md-mermaid-label-fg-color)}.actor{fill:var(--md-mermaid-sequence-actor-bg-color);stroke:var(--md-mermaid-sequence-actor-border-color)}text.actor>tspan{fill:var(--md-mermaid-sequence-actor-fg-color);font-family:var(--md-mermaid-font-family)}line{stroke:var(--md-mermaid-sequence-actor-line-color)}.actor-man circle,.actor-man line{fill:var(--md-mermaid-sequence-actorman-bg-color);stroke:var(--md-mermaid-sequence-actorman-line-color)}.messageLine0,.messageLine1{stroke:var(--md-mermaid-sequence-message-line-color)}.note{fill:var(--md-mermaid-sequence-note-bg-color);stroke:var(--md-mermaid-sequence-note-border-color)}.loopText,.loopText>tspan,.messageText,.noteText>tspan{stroke:none;font-family:var(--md-mermaid-font-family)!important}.messageText{fill:var(--md-mermaid-sequence-message-fg-color)}.loopText,.loopText>tspan{fill:var(--md-mermaid-sequence-loop-fg-color)}.noteText>tspan{fill:var(--md-mermaid-sequence-note-fg-color)}#arrowhead path{fill:var(--md-mermaid-sequence-message-line-color);stroke:none}.loopLine{fill:var(--md-mermaid-sequence-loop-bg-color);stroke:var(--md-mermaid-sequence-loop-border-color)}.labelBox{fill:var(--md-mermaid-sequence-label-bg-color);stroke:none}.labelText,.labelText>span{fill:var(--md-mermaid-sequence-label-fg-color);font-family:var(--md-mermaid-font-family)}.sequenceNumber{fill:var(--md-mermaid-sequence-number-fg-color)}rect.rect{fill:var(--md-mermaid-sequence-box-bg-color);stroke:none}rect.rect+text.text{fill:var(--md-mermaid-sequence-box-fg-color)}defs #sequencenumber{fill:var(--md-mermaid-sequence-number-bg-color)!important}";var ko,pp=0;function fp(){return typeof mermaid=="undefined"||mermaid instanceof Element?ar("https://unpkg.com/mermaid@11/dist/mermaid.min.js"):Y(void 0)}function $s(e){return e.classList.remove("mermaid"),ko||(ko=fp().pipe($(()=>mermaid.initialize({startOnLoad:!1,themeCSS:Hs,sequence:{actorFontSize:"16px",messageFontSize:"16px",noteFontSize:"16px"}})),f(()=>{}),se(1))),ko.subscribe(()=>Uo(null,null,function*(){e.classList.add("mermaid");let t=`__mermaid_${pp++}`,r=A("div",{class:"mermaid"}),n=e.textContent,{svg:o,fn:i}=yield mermaid.render(t,n),a=r.attachShadow({mode:"closed"});a.innerHTML=o,e.replaceWith(r),i==null||i(a)})),ko.pipe(f(()=>({ref:e})))}var Ps=A("table");function Is(e){return e.replaceWith(Ps),Ps.replaceWith(gs(e)),Y({ref:e})}function mp(e){let t=e.find(r=>r.checked)||e[0];return R(...e.map(r=>b(r,"change").pipe(f(()=>G(`label[for="${r.id}"]`))))).pipe(J(G(`label[for="${t.id}"]`)),f(r=>({active:r})))}function Rs(e,{viewport$:t,target$:r}){let n=G(".tabbed-labels",e),o=P(":scope > input",e),i=Oo("prev");e.append(i);let a=Oo("next");return e.append(a),j(()=>{let s=new 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t.pipe(g(r=>R(Y(!0),Y(!1).pipe(It(2e3))).pipe(f(n=>({message:r,active:n})))))}function Fs(e,t){let r=G(".md-typeset",e);return j(()=>{let n=new I;return n.subscribe(({message:o,active:i})=>{e.classList.toggle("md-dialog--active",i),r.textContent=o}),dp(e,t).pipe($(o=>n.next(o)),V(()=>n.complete()),f(o=>H({ref:e},o)))})}function hp({viewport$:e}){if(!X("header.autohide"))return Y(!1);let t=e.pipe(f(({offset:{y:o}})=>o),Pt(2,1),f(([o,i])=>[o<i,i]),fe(0)),r=re([e,t]).pipe(L(([{offset:o},[,i]])=>Math.abs(i-o.y)>100),f(([,[o]])=>o),ie()),n=Tn("search");return re([e,n]).pipe(f(([{offset:o},i])=>o.y>400&&!i),ie(),g(o=>o?r:Y(!1)),J(!1))}function Us(e,t){return j(()=>re([Re(e),hp(t)])).pipe(f(([{height:r},n])=>({height:r,hidden:n})),ie((r,n)=>r.height===n.height&&r.hidden===n.hidden),se(1))}function Ns(e,{viewport$:t,header$:r,main$:n}){return j(()=>{let o=new 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re([n,o,t]).pipe(f(([i,{top:a,bottom:s},{offset:{y:c},size:{height:l}}])=>(l=Math.max(0,l-Math.max(0,a-c,i)-Math.max(0,l+c-s)),{offset:a-i,height:l,active:a-i<=c})),ie((i,a)=>i.offset===a.offset&&i.height===a.height&&i.active===a.active))}function bp(e){let t=__md_get("__palette")||{index:e.findIndex(n=>matchMedia(n.getAttribute("data-md-color-media")).matches)},r=Math.max(0,Math.min(t.index,e.length-1));return Y(...e).pipe(oe(n=>b(n,"change").pipe(f(()=>n))),J(e[r]),f(n=>({index:e.indexOf(n),color:{media:n.getAttribute("data-md-color-media"),scheme:n.getAttribute("data-md-color-scheme"),primary:n.getAttribute("data-md-color-primary"),accent:n.getAttribute("data-md-color-accent")}})),se(1))}function Vs(e){let t=P("input",e),r=A("meta",{name:"theme-color"});document.head.appendChild(r);let n=A("meta",{name:"color-scheme"});document.head.appendChild(n);let o=Ir("(prefers-color-scheme: light)");return j(()=>{let i=new I;return 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Lp(e){e.setAttribute("data-md-copying","");let t=e.closest("[data-copy]"),r=t?t.getAttribute("data-copy"):e.innerText;return e.removeAttribute("data-md-copying"),r.trimEnd()}function oc({alert$:e}){Co.default.isSupported()&&new U(t=>{new Co.default("[data-clipboard-target], [data-clipboard-text]",{text:r=>r.getAttribute("data-clipboard-text")||Lp(G(r.getAttribute("data-clipboard-target")))}).on("success",r=>t.next(r))}).pipe($(t=>{t.trigger.focus()}),f(()=>Bt("clipboard.copied"))).subscribe(e)}function ic(e,t){if(!(e.target instanceof Element))return y;let r=e.target.closest("a");if(r===null)return y;if(r.target||e.metaKey||e.ctrlKey)return y;let n=new URL(r.href);return n.search=n.hash="",t.has(`${n}`)?(e.preventDefault(),Y(r)):y}function ac(e){let t=new Map;for(let r of P(":scope > *",e.head))t.set(r.outerHTML,r);return t}function sc(e){for(let t of P("[href], [src]",e))for(let r of["href","src"]){let n=t.getAttribute(r);if(n&&!/^(?:[a-z]+:)?\/\//i.test(n)){t[r]=t[r];break}}return 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Ke;Y(document).subscribe(sc);let o=b(document.body,"click").pipe(Ze(e),g(([s,c])=>ic(s,c)),f(({href:s})=>new URL(s)),xe()),i=b(window,"popstate").pipe(f(Ye),xe());o.pipe(pe(r)).subscribe(([s,{offset:c}])=>{history.replaceState(c,""),history.pushState(null,"",s)}),R(o,i).subscribe(t);let a=t.pipe(fe("pathname"),g(s=>En(s,{progress$:n}).pipe(_e(()=>(dt(s,!0),y)))),g(sc),g(Mp),xe());return R(a.pipe(pe(t,(s,c)=>c)),a.pipe(g(()=>t),fe("hash")),t.pipe(ie((s,c)=>s.pathname===c.pathname&&s.hash===c.hash),g(()=>o),$(()=>history.back()))).subscribe(s=>{var c,l;history.state!==null||!s.hash?window.scrollTo(0,(l=(c=history.state)==null?void 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index a99744001..fdcaa06a6 100644
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index 7ecdf1a4d..170feccdf 100644
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         <footer class="md-footer">
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index bac5e672d..8c32f6bc8 100644
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-  
-  <svg xmlns="http://www.w3.org/2000/svg" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" class="lucide lucide-circle-arrow-up" viewBox="0 0 24 24"><circle cx="12" cy="12" r="10"/><path d="m16 12-4-4-4 4M12 16V8"/></svg>
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index 33628a5e4..1abfee8c7 100644
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-  <svg xmlns="http://www.w3.org/2000/svg" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" class="lucide lucide-circle-arrow-up" viewBox="0 0 24 24"><circle cx="12" cy="12" r="10"/><path d="m16 12-4-4-4 4M12 16V8"/></svg>
-  К началу
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@@ -6878,7 +6872,7 @@ aria-label="Нижний колонтитул"
     
       
       
-      <script id="__config" type="application/json">{"annotate":null,"base":"../../","features":["content.action.edit","content.code.annotate","content.code.copy","content.tabs.link","content.tooltips","navigation.indexes","navigation.top","navigation.tracking","search.highlight","search.share","search.suggest","toc.follow"],"search":"../../assets/javascripts/workers/search.e2d2d235.min.js","tags":null,"translations":{"clipboard.copied":"Скопировано в буфер","clipboard.copy":"Копировать в буфер","search.result.more.one":"Ещё 1 на этой странице","search.result.more.other":"Ещё # на этой странице","search.result.none":"Совпадений не найдено","search.result.one":"Найдено 1 совпадение","search.result.other":"Найдено совпадений: #","search.result.placeholder":"Начните печатать для поиска","search.result.term.missing":"Отсутствует","select.version":"Выберите версию"},"version":null}</script>
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index 255af5120..533ab54a5 100644
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-  
-  <svg xmlns="http://www.w3.org/2000/svg" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" class="lucide lucide-circle-arrow-up" viewBox="0 0 24 24"><circle cx="12" cy="12" r="10"/><path d="m16 12-4-4-4 4M12 16V8"/></svg>
-  К началу
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-      <script id="__config" type="application/json">{"annotate":null,"base":"../../","features":["content.action.edit","content.code.annotate","content.code.copy","content.tabs.link","content.tooltips","navigation.indexes","navigation.top","navigation.tracking","search.highlight","search.share","search.suggest","toc.follow"],"search":"../../assets/javascripts/workers/search.e2d2d235.min.js","tags":null,"translations":{"clipboard.copied":"Скопировано в буфер","clipboard.copy":"Копировать в буфер","search.result.more.one":"Ещё 1 на этой странице","search.result.more.other":"Ещё # на этой странице","search.result.none":"Совпадений не найдено","search.result.one":"Найдено 1 совпадение","search.result.other":"Найдено совпадений: #","search.result.placeholder":"Начните печатать для поиска","search.result.term.missing":"Отсутствует","select.version":"Выберите версию"},"version":null}</script>
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diff --git a/ru/chapter_stack_and_queue/summary/index.html b/ru/chapter_stack_and_queue/summary/index.html
index 06759fdf3..c333f02e6 100644
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-  
-  <svg xmlns="http://www.w3.org/2000/svg" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" class="lucide lucide-circle-arrow-up" viewBox="0 0 24 24"><circle cx="12" cy="12" r="10"/><path d="m16 12-4-4-4 4M12 16V8"/></svg>
-  К началу
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-      <script id="__config" type="application/json">{"annotate":null,"base":"../../","features":["content.action.edit","content.code.annotate","content.code.copy","content.tabs.link","content.tooltips","navigation.indexes","navigation.top","navigation.tracking","search.highlight","search.share","search.suggest","toc.follow"],"search":"../../assets/javascripts/workers/search.e2d2d235.min.js","tags":null,"translations":{"clipboard.copied":"Скопировано в буфер","clipboard.copy":"Копировать в буфер","search.result.more.one":"Ещё 1 на этой странице","search.result.more.other":"Ещё # на этой странице","search.result.none":"Совпадений не найдено","search.result.one":"Найдено 1 совпадение","search.result.other":"Найдено совпадений: #","search.result.placeholder":"Начните печатать для поиска","search.result.term.missing":"Отсутствует","select.version":"Выберите версию"},"version":null}</script>
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-  
-  <svg xmlns="http://www.w3.org/2000/svg" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" class="lucide lucide-circle-arrow-up" viewBox="0 0 24 24"><circle cx="12" cy="12" r="10"/><path d="m16 12-4-4-4 4M12 16V8"/></svg>
-  К началу
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diff --git a/ru/chapter_tree/avl_tree/index.html b/ru/chapter_tree/avl_tree/index.html
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         </div>
         
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-      <script id="__config" type="application/json">{"annotate":null,"base":"../../","features":["content.action.edit","content.code.annotate","content.code.copy","content.tabs.link","content.tooltips","navigation.indexes","navigation.top","navigation.tracking","search.highlight","search.share","search.suggest","toc.follow"],"search":"../../assets/javascripts/workers/search.e2d2d235.min.js","tags":null,"translations":{"clipboard.copied":"Скопировано в буфер","clipboard.copy":"Копировать в буфер","search.result.more.one":"Ещё 1 на этой странице","search.result.more.other":"Ещё # на этой странице","search.result.none":"Совпадений не найдено","search.result.one":"Найдено 1 совпадение","search.result.other":"Найдено совпадений: #","search.result.placeholder":"Начните печатать для поиска","search.result.term.missing":"Отсутствует","select.version":"Выберите версию"},"version":null}</script>
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index bec593018..a6e7744c2 100644
--- a/ru/chapter_tree/binary_search_tree/index.html
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-  
-  <svg xmlns="http://www.w3.org/2000/svg" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" class="lucide lucide-circle-arrow-up" viewBox="0 0 24 24"><circle cx="12" cy="12" r="10"/><path d="m16 12-4-4-4 4M12 16V8"/></svg>
-  К началу
-</button>
-        
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         <footer class="md-footer">
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-      <script id="__config" type="application/json">{"annotate":null,"base":"../../","features":["content.action.edit","content.code.annotate","content.code.copy","content.tabs.link","content.tooltips","navigation.indexes","navigation.top","navigation.tracking","search.highlight","search.share","search.suggest","toc.follow"],"search":"../../assets/javascripts/workers/search.e2d2d235.min.js","tags":null,"translations":{"clipboard.copied":"Скопировано в буфер","clipboard.copy":"Копировать в буфер","search.result.more.one":"Ещё 1 на этой странице","search.result.more.other":"Ещё # на этой странице","search.result.none":"Совпадений не найдено","search.result.one":"Найдено 1 совпадение","search.result.other":"Найдено совпадений: #","search.result.placeholder":"Начните печатать для поиска","search.result.term.missing":"Отсутствует","select.version":"Выберите версию"},"version":null}</script>
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index d23298e32..1c4f11d33 100644
--- a/ru/chapter_tree/binary_tree/index.html
+++ b/ru/chapter_tree/binary_tree/index.html
@@ -5313,12 +5313,6 @@ aria-label="Нижний колонтитул"
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         </div>
         
-          <button type="button" class="md-top md-icon" data-md-component="top" hidden>
-  
-  <svg xmlns="http://www.w3.org/2000/svg" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" class="lucide lucide-circle-arrow-up" viewBox="0 0 24 24"><circle cx="12" cy="12" r="10"/><path d="m16 12-4-4-4 4M12 16V8"/></svg>
-  К началу
-</button>
-        
       </main>
       
         <footer class="md-footer">
@@ -5385,7 +5379,7 @@ aria-label="Нижний колонтитул"
     
       
       
-      <script id="__config" type="application/json">{"annotate":null,"base":"../../","features":["content.action.edit","content.code.annotate","content.code.copy","content.tabs.link","content.tooltips","navigation.indexes","navigation.top","navigation.tracking","search.highlight","search.share","search.suggest","toc.follow"],"search":"../../assets/javascripts/workers/search.e2d2d235.min.js","tags":null,"translations":{"clipboard.copied":"Скопировано в буфер","clipboard.copy":"Копировать в буфер","search.result.more.one":"Ещё 1 на этой странице","search.result.more.other":"Ещё # на этой странице","search.result.none":"Совпадений не найдено","search.result.one":"Найдено 1 совпадение","search.result.other":"Найдено совпадений: #","search.result.placeholder":"Начните печатать для поиска","search.result.term.missing":"Отсутствует","select.version":"Выберите версию"},"version":null}</script>
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diff --git a/ru/chapter_tree/binary_tree_traversal/index.html b/ru/chapter_tree/binary_tree_traversal/index.html
index ec5d7cad6..c34effb01 100644
--- a/ru/chapter_tree/binary_tree_traversal/index.html
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@@ -5419,12 +5419,6 @@ aria-label="Нижний колонтитул"
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         </div>
         
-          <button type="button" class="md-top md-icon" data-md-component="top" hidden>
-  
-  <svg xmlns="http://www.w3.org/2000/svg" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" class="lucide lucide-circle-arrow-up" viewBox="0 0 24 24"><circle cx="12" cy="12" r="10"/><path d="m16 12-4-4-4 4M12 16V8"/></svg>
-  К началу
-</button>
-        
       </main>
       
         <footer class="md-footer">
@@ -5491,7 +5485,7 @@ aria-label="Нижний колонтитул"
     
       
       
-      <script id="__config" type="application/json">{"annotate":null,"base":"../../","features":["content.action.edit","content.code.annotate","content.code.copy","content.tabs.link","content.tooltips","navigation.indexes","navigation.top","navigation.tracking","search.highlight","search.share","search.suggest","toc.follow"],"search":"../../assets/javascripts/workers/search.e2d2d235.min.js","tags":null,"translations":{"clipboard.copied":"Скопировано в буфер","clipboard.copy":"Копировать в буфер","search.result.more.one":"Ещё 1 на этой странице","search.result.more.other":"Ещё # на этой странице","search.result.none":"Совпадений не найдено","search.result.one":"Найдено 1 совпадение","search.result.other":"Найдено совпадений: #","search.result.placeholder":"Начните печатать для поиска","search.result.term.missing":"Отсутствует","select.version":"Выберите версию"},"version":null}</script>
+      <script id="__config" type="application/json">{"annotate":null,"base":"../../","features":["content.action.edit","content.code.annotate","content.code.copy","content.tabs.link","content.tooltips","navigation.indexes","navigation.tracking","search.highlight","search.share","search.suggest","toc.follow"],"search":"../../assets/javascripts/workers/search.e2d2d235.min.js","tags":null,"translations":{"clipboard.copied":"Скопировано в буфер","clipboard.copy":"Копировать в буфер","search.result.more.one":"Ещё 1 на этой странице","search.result.more.other":"Ещё # на этой странице","search.result.none":"Совпадений не найдено","search.result.one":"Найдено 1 совпадение","search.result.other":"Найдено совпадений: #","search.result.placeholder":"Начните печатать для поиска","search.result.term.missing":"Отсутствует","select.version":"Выберите версию"},"version":null}</script>
     
     
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diff --git a/ru/chapter_tree/index.html b/ru/chapter_tree/index.html
index 9cc089c7d..e41c33834 100644
--- a/ru/chapter_tree/index.html
+++ b/ru/chapter_tree/index.html
@@ -4426,12 +4426,6 @@ aria-label="Нижний колонтитул"
 <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script>
         </div>
         
-          <button type="button" class="md-top md-icon" data-md-component="top" hidden>
-  
-  <svg xmlns="http://www.w3.org/2000/svg" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" class="lucide lucide-circle-arrow-up" viewBox="0 0 24 24"><circle cx="12" cy="12" r="10"/><path d="m16 12-4-4-4 4M12 16V8"/></svg>
-  К началу
-</button>
-        
       </main>
       
         <footer class="md-footer">
@@ -4498,7 +4492,7 @@ aria-label="Нижний колонтитул"
     
       
       
-      <script id="__config" type="application/json">{"annotate":null,"base":"../","features":["content.action.edit","content.code.annotate","content.code.copy","content.tabs.link","content.tooltips","navigation.indexes","navigation.top","navigation.tracking","search.highlight","search.share","search.suggest","toc.follow"],"search":"../assets/javascripts/workers/search.e2d2d235.min.js","tags":null,"translations":{"clipboard.copied":"Скопировано в буфер","clipboard.copy":"Копировать в буфер","search.result.more.one":"Ещё 1 на этой странице","search.result.more.other":"Ещё # на этой странице","search.result.none":"Совпадений не найдено","search.result.one":"Найдено 1 совпадение","search.result.other":"Найдено совпадений: #","search.result.placeholder":"Начните печатать для поиска","search.result.term.missing":"Отсутствует","select.version":"Выберите версию"},"version":null}</script>
+      <script id="__config" type="application/json">{"annotate":null,"base":"../","features":["content.action.edit","content.code.annotate","content.code.copy","content.tabs.link","content.tooltips","navigation.indexes","navigation.tracking","search.highlight","search.share","search.suggest","toc.follow"],"search":"../assets/javascripts/workers/search.e2d2d235.min.js","tags":null,"translations":{"clipboard.copied":"Скопировано в буфер","clipboard.copy":"Копировать в буфер","search.result.more.one":"Ещё 1 на этой странице","search.result.more.other":"Ещё # на этой странице","search.result.none":"Совпадений не найдено","search.result.one":"Найдено 1 совпадение","search.result.other":"Найдено совпадений: #","search.result.placeholder":"Начните печатать для поиска","search.result.term.missing":"Отсутствует","select.version":"Выберите версию"},"version":null}</script>
     
     
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diff --git a/ru/chapter_tree/summary/index.html b/ru/chapter_tree/summary/index.html
index 1c8f7e5f0..11cbea996 100644
--- a/ru/chapter_tree/summary/index.html
+++ b/ru/chapter_tree/summary/index.html
@@ -4528,12 +4528,6 @@ aria-label="Нижний колонтитул"
 <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script>
         </div>
         
-          <button type="button" class="md-top md-icon" data-md-component="top" hidden>
-  
-  <svg xmlns="http://www.w3.org/2000/svg" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" class="lucide lucide-circle-arrow-up" viewBox="0 0 24 24"><circle cx="12" cy="12" r="10"/><path d="m16 12-4-4-4 4M12 16V8"/></svg>
-  К началу
-</button>
-        
       </main>
       
         <footer class="md-footer">
@@ -4600,7 +4594,7 @@ aria-label="Нижний колонтитул"
     
       
       
-      <script id="__config" type="application/json">{"annotate":null,"base":"../../","features":["content.action.edit","content.code.annotate","content.code.copy","content.tabs.link","content.tooltips","navigation.indexes","navigation.top","navigation.tracking","search.highlight","search.share","search.suggest","toc.follow"],"search":"../../assets/javascripts/workers/search.e2d2d235.min.js","tags":null,"translations":{"clipboard.copied":"Скопировано в буфер","clipboard.copy":"Копировать в буфер","search.result.more.one":"Ещё 1 на этой странице","search.result.more.other":"Ещё # на этой странице","search.result.none":"Совпадений не найдено","search.result.one":"Найдено 1 совпадение","search.result.other":"Найдено совпадений: #","search.result.placeholder":"Начните печатать для поиска","search.result.term.missing":"Отсутствует","select.version":"Выберите версию"},"version":null}</script>
+      <script id="__config" type="application/json">{"annotate":null,"base":"../../","features":["content.action.edit","content.code.annotate","content.code.copy","content.tabs.link","content.tooltips","navigation.indexes","navigation.tracking","search.highlight","search.share","search.suggest","toc.follow"],"search":"../../assets/javascripts/workers/search.e2d2d235.min.js","tags":null,"translations":{"clipboard.copied":"Скопировано в буфер","clipboard.copy":"Копировать в буфер","search.result.more.one":"Ещё 1 на этой странице","search.result.more.other":"Ещё # на этой странице","search.result.none":"Совпадений не найдено","search.result.one":"Найдено 1 совпадение","search.result.other":"Найдено совпадений: #","search.result.placeholder":"Начните печатать для поиска","search.result.term.missing":"Отсутствует","select.version":"Выберите версию"},"version":null}</script>
     
     
       <script src="../../assets/javascripts/bundle.c2b142ea.min.js"></script>
diff --git a/ru/index.assets/animation.mp4 b/ru/index.assets/animation.mp4
new file mode 100644
index 000000000..cf3838e79
Binary files /dev/null and b/ru/index.assets/animation.mp4 differ
diff --git a/ru/index.assets/comment.mp4 b/ru/index.assets/comment.mp4
new file mode 100644
index 000000000..3f9ea340c
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diff --git a/ru/index.assets/running_code.mp4 b/ru/index.assets/running_code.mp4
new file mode 100644
index 000000000..c946fbd68
Binary files /dev/null and b/ru/index.assets/running_code.mp4 differ
diff --git a/ru/index.html b/ru/index.html
index 6bf415511..38afddaba 100644
--- a/ru/index.html
+++ b/ru/index.html
@@ -342,10 +342,12 @@
                 </p>
               </div>
             </div>
-            <img alt="Animation example" class="intro-image" src="index.assets/animation.gif"/>
+            <video aria-label="Animation example" autoplay="" class="intro-image" loop="" muted="" playsinline="" src="index.assets/animation.mp4">
+            </video>
           </div>
           <div class="intro-container">
-            <img alt="Running code example" class="intro-image" src="index.assets/running_code.gif"/>
+            <video aria-label="Running code example" autoplay="" class="intro-image" loop="" muted="" playsinline="" src="index.assets/running_code.mp4">
+            </video>
             <div class="intro-text">
               <div>
                 <div style="display: flex; align-items: center;">
@@ -390,7 +392,8 @@
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               </div>
             </div>
-            <img alt="Comments example" class="intro-image" src="index.assets/comment.gif"/>
+            <video aria-label="Comments example" autoplay="" class="intro-image" loop="" muted="" playsinline="" src="index.assets/comment.mp4">
+            </video>
           </div>
         </div>
       </section>
@@ -1785,15 +1788,6 @@
             var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))
           </script>
         </div>
-        <button class="md-top md-icon" data-md-component="top" hidden="" type="button">
-          <svg class="lucide lucide-circle-arrow-up" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" viewbox="0 0 24 24" xmlns="http://www.w3.org/2000/svg">
-            <circle cx="12" cy="12" r="10">
-            </circle>
-            <path d="m16 12-4-4-4 4M12 16V8">
-            </path>
-          </svg>
-          К началу
-        </button>
       </main>
       <footer class="md-footer">
         <div class="md-footer-meta md-typeset">
@@ -1840,7 +1834,7 @@
       </div>
     </div>
     <script id="__config" type="application/json">
-      {"annotate":null,"base":"./","features":["content.action.edit","content.code.annotate","content.code.copy","content.tabs.link","content.tooltips","navigation.indexes","navigation.top","navigation.tracking","search.highlight","search.share","search.suggest","toc.follow"],"search":"./assets/javascripts/workers/search.e2d2d235.min.js","tags":null,"translations":{"clipboard.copied":"Скопировано в буфер","clipboard.copy":"Копировать в буфер","search.result.more.one":"Ещё 1 на этой странице","search.result.more.other":"Ещё # на этой странице","search.result.none":"Совпадений не найдено","search.result.one":"Найдено 1 совпадение","search.result.other":"Найдено совпадений: #","search.result.placeholder":"Начните печатать для поиска","search.result.term.missing":"Отсутствует","select.version":"Выберите версию"},"version":null}
+      {"annotate":null,"base":"./","features":["content.action.edit","content.code.annotate","content.code.copy","content.tabs.link","content.tooltips","navigation.indexes","navigation.tracking","search.highlight","search.share","search.suggest","toc.follow"],"search":"./assets/javascripts/workers/search.e2d2d235.min.js","tags":null,"translations":{"clipboard.copied":"Скопировано в буфер","clipboard.copy":"Копировать в буфер","search.result.more.one":"Ещё 1 на этой странице","search.result.more.other":"Ещё # на этой странице","search.result.none":"Совпадений не найдено","search.result.one":"Найдено 1 совпадение","search.result.other":"Найдено совпадений: #","search.result.placeholder":"Начните печатать для поиска","search.result.term.missing":"Отсутствует","select.version":"Выберите версию"},"version":null}
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     <script src="./assets/javascripts/bundle.c2b142ea.min.js">
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diff --git a/ru/javascripts/animation_player.js b/ru/javascripts/animation_player.js
index 9b691b557..7ae0294ba 100644
--- a/ru/javascripts/animation_player.js
+++ b/ru/javascripts/animation_player.js
@@ -251,4 +251,4 @@
     initAutoSlide();
   }
 })();
-/*! update cache: 20260331211930 */
+/*! update cache: 20260331235032 */
diff --git a/ru/javascripts/katex.js b/ru/javascripts/katex.js
index aec5dc616..ab8e5c374 100644
--- a/ru/javascripts/katex.js
+++ b/ru/javascripts/katex.js
@@ -8,4 +8,4 @@ document$.subscribe(({ body }) => {
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   });
 });
-/*! update cache: 20260331211930 */
+/*! update cache: 20260331235032 */
diff --git a/ru/javascripts/mathjax.js b/ru/javascripts/mathjax.js
index a7a6c0fb5..3231b5c3f 100644
--- a/ru/javascripts/mathjax.js
+++ b/ru/javascripts/mathjax.js
@@ -15,4 +15,4 @@ window.MathJax = {
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   MathJax.typesetPromise();
 });
-/*! update cache: 20260331211930 */
+/*! update cache: 20260331235032 */
diff --git a/ru/javascripts/starfield.js b/ru/javascripts/starfield.js
index af32a3789..770622b04 100644
--- a/ru/javascripts/starfield.js
+++ b/ru/javascripts/starfield.js
@@ -469,4 +469,4 @@
 
   return Starfield;
 });
-/*! update cache: 20260331211930 */
+/*! update cache: 20260331235032 */
diff --git a/ru/stylesheets/animation_player.css b/ru/stylesheets/animation_player.css
index 78a11f8e0..5e8602fc3 100644
--- a/ru/stylesheets/animation_player.css
+++ b/ru/stylesheets/animation_player.css
@@ -176,4 +176,4 @@
     font-size: 0.7rem;
   }
 }
-/*! update cache: 20260331211930 */
+/*! update cache: 20260331235032 */
diff --git a/ru/stylesheets/extra.css b/ru/stylesheets/extra.css
index 7ce2cfc35..c7a4125ea 100644
--- a/ru/stylesheets/extra.css
+++ b/ru/stylesheets/extra.css
@@ -573,7 +573,7 @@ a:hover .device-on-hover {
 }
 
 .intro-text svg path {
-  fill: #3b3b3b;
+  fill: var(--md-primary-bg-color);
 }
 
 .endor-text {
@@ -713,4 +713,4 @@ a:hover .device-on-hover {
     flex: 1 1 30%;
   }
 }
-/*! update cache: 20260331211930 */
+/*! update cache: 20260331235032 */
diff --git a/stylesheets/animation_player.css b/stylesheets/animation_player.css
index 24a6d5b4c..e2b98d4f3 100644
--- a/stylesheets/animation_player.css
+++ b/stylesheets/animation_player.css
@@ -176,4 +176,4 @@
     font-size: 0.7rem;
   }
 }
-/*! update cache: 20260331211843 */
+/*! update cache: 20260331234946 */
diff --git a/stylesheets/extra.css b/stylesheets/extra.css
index a567cfed9..daeb71b9e 100644
--- a/stylesheets/extra.css
+++ b/stylesheets/extra.css
@@ -573,7 +573,7 @@ a:hover .device-on-hover {
 }
 
 .intro-text svg path {
-  fill: #3b3b3b;
+  fill: var(--md-primary-bg-color);
 }
 
 .endor-text {
@@ -713,4 +713,4 @@ a:hover .device-on-hover {
     flex: 1 1 30%;
   }
 }
-/*! update cache: 20260331211843 */
+/*! update cache: 20260331234946 */
diff --git a/zh-hant/404.html b/zh-hant/404.html
index 3a9f694e9..d1c15b2a8 100644
--- a/zh-hant/404.html
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-  
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-  回到頂部
-</button>
-        
       </main>
       
         <footer class="md-footer">
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+      <script id="__config" type="application/json">{"annotate":null,"base":"/zh-hant/","features":["content.action.edit","content.code.annotate","content.code.copy","content.tabs.link","content.tooltips","navigation.indexes","navigation.tracking","search.highlight","search.share","search.suggest","toc.follow"],"search":"/zh-hant/assets/javascripts/workers/search.e2d2d235.min.js","tags":null,"translations":{"clipboard.copied":"已拷貝","clipboard.copy":"拷貝","search.result.more.one":"此頁尚有 1 個符合的項目","search.result.more.other":"此頁尚有 # 個符合的項目","search.result.none":"沒有找到符合條件的結果","search.result.one":"找到 1 个符合條件的結果","search.result.other":"找到 # 個符合條件的結果","search.result.placeholder":"鍵入以開始檢索","search.result.term.missing":"缺失","select.version":"選擇版本"},"version":null}</script>
     
     
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diff --git a/zh-hant/assets/javascripts/bundle.c2b142ea.min.js b/zh-hant/assets/javascripts/bundle.c2b142ea.min.js
index 696e51da6..833627bcc 100644
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+++ b/zh-hant/assets/javascripts/bundle.c2b142ea.min.js
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ir(e).pipe(g(n=>r.pipe(f(o=>({active:n,offset:o})),Me(+!n||1/0))))}function ys(e,t,{target$:r}){let[n,o]=Array.from(e.children);return j(()=>{let i=new I,a=i.pipe(he(),ye(!0));return i.subscribe({next({offset:s}){e.style.setProperty("--md-tooltip-x",`${s.x}px`),e.style.setProperty("--md-tooltip-y",`${s.y}px`)},complete(){e.style.removeProperty("--md-tooltip-x"),e.style.removeProperty("--md-tooltip-y")}}),Et(e).pipe(Q(a)).subscribe(s=>{e.toggleAttribute("data-md-visible",s)}),R(i.pipe(L(({active:s})=>s)),i.pipe(Be(250),L(({active:s})=>!s))).subscribe({next({active:s}){s?e.prepend(n):n.remove()},complete(){e.prepend(n)}}),i.pipe(Xe(16,je)).subscribe(({active:s})=>{n.classList.toggle("md-tooltip--active",s)}),i.pipe(Lr(125,je),L(()=>!!e.offsetParent),f(()=>e.offsetParent.getBoundingClientRect()),f(({x:s})=>s)).subscribe({next(s){s?e.style.setProperty("--md-tooltip-0",`${-s}px`):e.style.removeProperty("--md-tooltip-0")},complete(){e.style.removeProperty("--md-tooltip-0")}}),b(o,"click").pipe(Q(a),L(s=>!(s.metaKey||s.ctrlKey))).subscribe(s=>{s.stopPropagation(),s.preventDefault()}),b(o,"mousedown").pipe(Q(a),pe(i)).subscribe(([s,{active:c}])=>{var l;if(s.button!==0||s.metaKey||s.ctrlKey)s.preventDefault();else if(c){s.preventDefault();let u=e.parentElement.closest(".md-annotation");u instanceof HTMLElement?u.focus():(l=xt())==null||l.blur()}}),r.pipe(Q(a),L(s=>s===n),It(125)).subscribe(()=>e.focus()),tp(e,t).pipe($(s=>i.next(s)),V(()=>i.complete()),f(s=>H({ref:e},s)))})}function rp(e){let t=Ue();if(e.tagName!=="CODE")return[e];let r=[".c",".c1",".cm"];if(t.annotate){let n=e.closest("[class|=language]");if(n)for(let o of Array.from(n.classList)){if(!o.startsWith("language-"))continue;let[,i]=o.split("-");i in t.annotate&&r.push(...t.annotate[i])}}return P(r.join(", "),e)}function np(e){let t=[];for(let r of rp(e)){let n=[],o=document.createNodeIterator(r,NodeFilter.SHOW_TEXT);for(let i=o.nextNode();i;i=o.nextNode())n.push(i);for(let i of n){let a;for(;a=/(\(\d+\))(!)?/.exec(i.textContent);){let[,s,c]=a;if(typeof c=="undefined"){let 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rect{fill:var(--md-mermaid-edge-color)!important;stroke:none!important}.statediagram-cluster.statediagram-cluster .inner{fill:var(--md-default-bg-color)}.statediagram-cluster rect{fill:var(--md-mermaid-node-bg-color);stroke:var(--md-mermaid-node-fg-color)}.statediagram-state rect.divider{fill:var(--md-default-fg-color--lightest);stroke:var(--md-default-fg-color--lighter)}defs #statediagram-barbEnd{stroke:var(--md-mermaid-edge-color)}[id^=entity] path,[id^=entity] rect{fill:var(--md-default-bg-color)}.relationshipLine{stroke:var(--md-mermaid-edge-color)}defs .marker.oneOrMore.er *,defs .marker.onlyOne.er *,defs .marker.zeroOrMore.er *,defs .marker.zeroOrOne.er *{stroke:var(--md-mermaid-edge-color)!important}text:not([class]):last-child{fill:var(--md-mermaid-label-fg-color)}.actor{fill:var(--md-mermaid-sequence-actor-bg-color);stroke:var(--md-mermaid-sequence-actor-border-color)}text.actor>tspan{fill:var(--md-mermaid-sequence-actor-fg-color);font-family:var(--md-mermaid-font-family)}line{stroke:var(--md-mermaid-sequence-actor-line-color)}.actor-man circle,.actor-man 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index 45eae02a2..9838bc94a 100644
--- a/zh-hant/chapter_appendix/contribution/index.html
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         <footer class="md-footer">
@@ -4628,7 +4622,7 @@ aria-label="頁脚"
     
       
       
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diff --git a/zh-hant/chapter_appendix/index.html b/zh-hant/chapter_appendix/index.html
index e6a0e9b26..a23fe2cc4 100644
--- a/zh-hant/chapter_appendix/index.html
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-          <button type="button" class="md-top md-icon" data-md-component="top" hidden>
-  
-  <svg xmlns="http://www.w3.org/2000/svg" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" class="lucide lucide-circle-arrow-up" viewBox="0 0 24 24"><circle cx="12" cy="12" r="10"/><path d="m16 12-4-4-4 4M12 16V8"/></svg>
-  回到頂部
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       </main>
       
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diff --git a/zh-hant/chapter_tree/binary_search_tree/index.html b/zh-hant/chapter_tree/binary_search_tree/index.html
index 3b3c532fa..fb8703a17 100644
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+      <script id="__config" type="application/json">{"annotate":null,"base":"../../","features":["content.action.edit","content.code.annotate","content.code.copy","content.tabs.link","content.tooltips","navigation.indexes","navigation.tracking","search.highlight","search.share","search.suggest","toc.follow"],"search":"../../assets/javascripts/workers/search.e2d2d235.min.js","tags":null,"translations":{"clipboard.copied":"已拷貝","clipboard.copy":"拷貝","search.result.more.one":"此頁尚有 1 個符合的項目","search.result.more.other":"此頁尚有 # 個符合的項目","search.result.none":"沒有找到符合條件的結果","search.result.one":"找到 1 个符合條件的結果","search.result.other":"找到 # 個符合條件的結果","search.result.placeholder":"鍵入以開始檢索","search.result.term.missing":"缺失","select.version":"選擇版本"},"version":null}</script>
     
     
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index 25ee5ee3c..bb1eaf103 100644
--- a/zh-hant/chapter_tree/binary_tree/index.html
+++ b/zh-hant/chapter_tree/binary_tree/index.html
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 <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script>
         </div>
         
-          <button type="button" class="md-top md-icon" data-md-component="top" hidden>
-  
-  <svg xmlns="http://www.w3.org/2000/svg" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" class="lucide lucide-circle-arrow-up" viewBox="0 0 24 24"><circle cx="12" cy="12" r="10"/><path d="m16 12-4-4-4 4M12 16V8"/></svg>
-  回到頂部
-</button>
-        
       </main>
       
         <footer class="md-footer">
@@ -5395,7 +5389,7 @@ aria-label="頁脚"
     
       
       
-      <script id="__config" type="application/json">{"annotate":null,"base":"../../","features":["content.action.edit","content.code.annotate","content.code.copy","content.tabs.link","content.tooltips","navigation.indexes","navigation.top","navigation.tracking","search.highlight","search.share","search.suggest","toc.follow"],"search":"../../assets/javascripts/workers/search.e2d2d235.min.js","tags":null,"translations":{"clipboard.copied":"已拷貝","clipboard.copy":"拷貝","search.result.more.one":"此頁尚有 1 個符合的項目","search.result.more.other":"此頁尚有 # 個符合的項目","search.result.none":"沒有找到符合條件的結果","search.result.one":"找到 1 个符合條件的結果","search.result.other":"找到 # 個符合條件的結果","search.result.placeholder":"鍵入以開始檢索","search.result.term.missing":"缺失","select.version":"選擇版本"},"version":null}</script>
+      <script id="__config" type="application/json">{"annotate":null,"base":"../../","features":["content.action.edit","content.code.annotate","content.code.copy","content.tabs.link","content.tooltips","navigation.indexes","navigation.tracking","search.highlight","search.share","search.suggest","toc.follow"],"search":"../../assets/javascripts/workers/search.e2d2d235.min.js","tags":null,"translations":{"clipboard.copied":"已拷貝","clipboard.copy":"拷貝","search.result.more.one":"此頁尚有 1 個符合的項目","search.result.more.other":"此頁尚有 # 個符合的項目","search.result.none":"沒有找到符合條件的結果","search.result.one":"找到 1 个符合條件的結果","search.result.other":"找到 # 個符合條件的結果","search.result.placeholder":"鍵入以開始檢索","search.result.term.missing":"缺失","select.version":"選擇版本"},"version":null}</script>
     
     
       <script src="../../assets/javascripts/bundle.c2b142ea.min.js"></script>
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index 914a0ab84..781ea2c93 100644
--- a/zh-hant/chapter_tree/binary_tree_traversal/index.html
+++ b/zh-hant/chapter_tree/binary_tree_traversal/index.html
@@ -5427,12 +5427,6 @@ aria-label="頁脚"
 <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script>
         </div>
         
-          <button type="button" class="md-top md-icon" data-md-component="top" hidden>
-  
-  <svg xmlns="http://www.w3.org/2000/svg" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" class="lucide lucide-circle-arrow-up" viewBox="0 0 24 24"><circle cx="12" cy="12" r="10"/><path d="m16 12-4-4-4 4M12 16V8"/></svg>
-  回到頂部
-</button>
-        
       </main>
       
         <footer class="md-footer">
@@ -5499,7 +5493,7 @@ aria-label="頁脚"
     
       
       
-      <script id="__config" type="application/json">{"annotate":null,"base":"../../","features":["content.action.edit","content.code.annotate","content.code.copy","content.tabs.link","content.tooltips","navigation.indexes","navigation.top","navigation.tracking","search.highlight","search.share","search.suggest","toc.follow"],"search":"../../assets/javascripts/workers/search.e2d2d235.min.js","tags":null,"translations":{"clipboard.copied":"已拷貝","clipboard.copy":"拷貝","search.result.more.one":"此頁尚有 1 個符合的項目","search.result.more.other":"此頁尚有 # 個符合的項目","search.result.none":"沒有找到符合條件的結果","search.result.one":"找到 1 个符合條件的結果","search.result.other":"找到 # 個符合條件的結果","search.result.placeholder":"鍵入以開始檢索","search.result.term.missing":"缺失","select.version":"選擇版本"},"version":null}</script>
+      <script id="__config" type="application/json">{"annotate":null,"base":"../../","features":["content.action.edit","content.code.annotate","content.code.copy","content.tabs.link","content.tooltips","navigation.indexes","navigation.tracking","search.highlight","search.share","search.suggest","toc.follow"],"search":"../../assets/javascripts/workers/search.e2d2d235.min.js","tags":null,"translations":{"clipboard.copied":"已拷貝","clipboard.copy":"拷貝","search.result.more.one":"此頁尚有 1 個符合的項目","search.result.more.other":"此頁尚有 # 個符合的項目","search.result.none":"沒有找到符合條件的結果","search.result.one":"找到 1 个符合條件的結果","search.result.other":"找到 # 個符合條件的結果","search.result.placeholder":"鍵入以開始檢索","search.result.term.missing":"缺失","select.version":"選擇版本"},"version":null}</script>
     
     
       <script src="../../assets/javascripts/bundle.c2b142ea.min.js"></script>
diff --git a/zh-hant/chapter_tree/index.html b/zh-hant/chapter_tree/index.html
index fb65165b3..64398d7b3 100644
--- a/zh-hant/chapter_tree/index.html
+++ b/zh-hant/chapter_tree/index.html
@@ -4434,12 +4434,6 @@ aria-label="頁脚"
 <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script>
         </div>
         
-          <button type="button" class="md-top md-icon" data-md-component="top" hidden>
-  
-  <svg xmlns="http://www.w3.org/2000/svg" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" class="lucide lucide-circle-arrow-up" viewBox="0 0 24 24"><circle cx="12" cy="12" r="10"/><path d="m16 12-4-4-4 4M12 16V8"/></svg>
-  回到頂部
-</button>
-        
       </main>
       
         <footer class="md-footer">
@@ -4506,7 +4500,7 @@ aria-label="頁脚"
     
       
       
-      <script id="__config" type="application/json">{"annotate":null,"base":"../","features":["content.action.edit","content.code.annotate","content.code.copy","content.tabs.link","content.tooltips","navigation.indexes","navigation.top","navigation.tracking","search.highlight","search.share","search.suggest","toc.follow"],"search":"../assets/javascripts/workers/search.e2d2d235.min.js","tags":null,"translations":{"clipboard.copied":"已拷貝","clipboard.copy":"拷貝","search.result.more.one":"此頁尚有 1 個符合的項目","search.result.more.other":"此頁尚有 # 個符合的項目","search.result.none":"沒有找到符合條件的結果","search.result.one":"找到 1 个符合條件的結果","search.result.other":"找到 # 個符合條件的結果","search.result.placeholder":"鍵入以開始檢索","search.result.term.missing":"缺失","select.version":"選擇版本"},"version":null}</script>
+      <script id="__config" type="application/json">{"annotate":null,"base":"../","features":["content.action.edit","content.code.annotate","content.code.copy","content.tabs.link","content.tooltips","navigation.indexes","navigation.tracking","search.highlight","search.share","search.suggest","toc.follow"],"search":"../assets/javascripts/workers/search.e2d2d235.min.js","tags":null,"translations":{"clipboard.copied":"已拷貝","clipboard.copy":"拷貝","search.result.more.one":"此頁尚有 1 個符合的項目","search.result.more.other":"此頁尚有 # 個符合的項目","search.result.none":"沒有找到符合條件的結果","search.result.one":"找到 1 个符合條件的結果","search.result.other":"找到 # 個符合條件的結果","search.result.placeholder":"鍵入以開始檢索","search.result.term.missing":"缺失","select.version":"選擇版本"},"version":null}</script>
     
     
       <script src="../assets/javascripts/bundle.c2b142ea.min.js"></script>
diff --git a/zh-hant/chapter_tree/summary/index.html b/zh-hant/chapter_tree/summary/index.html
index e5c928e94..759333ebc 100644
--- a/zh-hant/chapter_tree/summary/index.html
+++ b/zh-hant/chapter_tree/summary/index.html
@@ -4536,12 +4536,6 @@ aria-label="頁脚"
 <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script>
         </div>
         
-          <button type="button" class="md-top md-icon" data-md-component="top" hidden>
-  
-  <svg xmlns="http://www.w3.org/2000/svg" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" class="lucide lucide-circle-arrow-up" viewBox="0 0 24 24"><circle cx="12" cy="12" r="10"/><path d="m16 12-4-4-4 4M12 16V8"/></svg>
-  回到頂部
-</button>
-        
       </main>
       
         <footer class="md-footer">
@@ -4608,7 +4602,7 @@ aria-label="頁脚"
     
       
       
-      <script id="__config" type="application/json">{"annotate":null,"base":"../../","features":["content.action.edit","content.code.annotate","content.code.copy","content.tabs.link","content.tooltips","navigation.indexes","navigation.top","navigation.tracking","search.highlight","search.share","search.suggest","toc.follow"],"search":"../../assets/javascripts/workers/search.e2d2d235.min.js","tags":null,"translations":{"clipboard.copied":"已拷貝","clipboard.copy":"拷貝","search.result.more.one":"此頁尚有 1 個符合的項目","search.result.more.other":"此頁尚有 # 個符合的項目","search.result.none":"沒有找到符合條件的結果","search.result.one":"找到 1 个符合條件的結果","search.result.other":"找到 # 個符合條件的結果","search.result.placeholder":"鍵入以開始檢索","search.result.term.missing":"缺失","select.version":"選擇版本"},"version":null}</script>
+      <script id="__config" type="application/json">{"annotate":null,"base":"../../","features":["content.action.edit","content.code.annotate","content.code.copy","content.tabs.link","content.tooltips","navigation.indexes","navigation.tracking","search.highlight","search.share","search.suggest","toc.follow"],"search":"../../assets/javascripts/workers/search.e2d2d235.min.js","tags":null,"translations":{"clipboard.copied":"已拷貝","clipboard.copy":"拷貝","search.result.more.one":"此頁尚有 1 個符合的項目","search.result.more.other":"此頁尚有 # 個符合的項目","search.result.none":"沒有找到符合條件的結果","search.result.one":"找到 1 个符合條件的結果","search.result.other":"找到 # 個符合條件的結果","search.result.placeholder":"鍵入以開始檢索","search.result.term.missing":"缺失","select.version":"選擇版本"},"version":null}</script>
     
     
       <script src="../../assets/javascripts/bundle.c2b142ea.min.js"></script>
diff --git a/zh-hant/index.assets/animation.mp4 b/zh-hant/index.assets/animation.mp4
new file mode 100644
index 000000000..cf3838e79
Binary files /dev/null and b/zh-hant/index.assets/animation.mp4 differ
diff --git a/zh-hant/index.assets/comment.mp4 b/zh-hant/index.assets/comment.mp4
new file mode 100644
index 000000000..3f9ea340c
Binary files /dev/null and b/zh-hant/index.assets/comment.mp4 differ
diff --git a/zh-hant/index.assets/running_code.mp4 b/zh-hant/index.assets/running_code.mp4
new file mode 100644
index 000000000..c946fbd68
Binary files /dev/null and b/zh-hant/index.assets/running_code.mp4 differ
diff --git a/zh-hant/index.html b/zh-hant/index.html
index 72fabc18c..e66e0e1a6 100644
--- a/zh-hant/index.html
+++ b/zh-hant/index.html
@@ -358,10 +358,12 @@
                 </p>
               </div>
             </div>
-            <img alt="Animation example" class="intro-image" src="index.assets/animation.gif"/>
+            <video aria-label="Animation example" autoplay="" class="intro-image" loop="" muted="" playsinline="" src="index.assets/animation.mp4">
+            </video>
           </div>
           <div class="intro-container">
-            <img alt="Running code example" class="intro-image" src="index.assets/running_code.gif"/>
+            <video aria-label="Running code example" autoplay="" class="intro-image" loop="" muted="" playsinline="" src="index.assets/running_code.mp4">
+            </video>
             <div class="intro-text">
               <div>
                 <div style="display: flex; align-items: center;">
@@ -406,7 +408,8 @@
                 </p>
               </div>
             </div>
-            <img alt="Comments example" class="intro-image" src="index.assets/comment.gif"/>
+            <video aria-label="Comments example" autoplay="" class="intro-image" loop="" muted="" playsinline="" src="index.assets/comment.mp4">
+            </video>
           </div>
         </div>
       </section>
@@ -1805,15 +1808,6 @@
             var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))
           </script>
         </div>
-        <button class="md-top md-icon" data-md-component="top" hidden="" type="button">
-          <svg class="lucide lucide-circle-arrow-up" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" viewbox="0 0 24 24" xmlns="http://www.w3.org/2000/svg">
-            <circle cx="12" cy="12" r="10">
-            </circle>
-            <path d="m16 12-4-4-4 4M12 16V8">
-            </path>
-          </svg>
-          回到頂部
-        </button>
       </main>
       <footer class="md-footer">
         <div class="md-footer-meta md-typeset">
@@ -1860,7 +1854,7 @@
       </div>
     </div>
     <script id="__config" type="application/json">
-      {"annotate":null,"base":"./","features":["content.action.edit","content.code.annotate","content.code.copy","content.tabs.link","content.tooltips","navigation.indexes","navigation.top","navigation.tracking","search.highlight","search.share","search.suggest","toc.follow"],"search":"./assets/javascripts/workers/search.e2d2d235.min.js","tags":null,"translations":{"clipboard.copied":"已拷貝","clipboard.copy":"拷貝","search.result.more.one":"此頁尚有 1 個符合的項目","search.result.more.other":"此頁尚有 # 個符合的項目","search.result.none":"沒有找到符合條件的結果","search.result.one":"找到 1 个符合條件的結果","search.result.other":"找到 # 個符合條件的結果","search.result.placeholder":"鍵入以開始檢索","search.result.term.missing":"缺失","select.version":"選擇版本"},"version":null}
+      {"annotate":null,"base":"./","features":["content.action.edit","content.code.annotate","content.code.copy","content.tabs.link","content.tooltips","navigation.indexes","navigation.tracking","search.highlight","search.share","search.suggest","toc.follow"],"search":"./assets/javascripts/workers/search.e2d2d235.min.js","tags":null,"translations":{"clipboard.copied":"已拷貝","clipboard.copy":"拷貝","search.result.more.one":"此頁尚有 1 個符合的項目","search.result.more.other":"此頁尚有 # 個符合的項目","search.result.none":"沒有找到符合條件的結果","search.result.one":"找到 1 个符合條件的結果","search.result.other":"找到 # 個符合條件的結果","search.result.placeholder":"鍵入以開始檢索","search.result.term.missing":"缺失","select.version":"選擇版本"},"version":null}
     </script>
     <script src="./assets/javascripts/bundle.c2b142ea.min.js">
     </script>
diff --git a/zh-hant/javascripts/animation_player.js b/zh-hant/javascripts/animation_player.js
index 9a5fa0705..fd00d64e2 100644
--- a/zh-hant/javascripts/animation_player.js
+++ b/zh-hant/javascripts/animation_player.js
@@ -251,4 +251,4 @@
     initAutoSlide();
   }
 })();
-/*! update cache: 20260331211854 */
+/*! update cache: 20260331234957 */
diff --git a/zh-hant/javascripts/katex.js b/zh-hant/javascripts/katex.js
index a57603110..1fc2770fd 100644
--- a/zh-hant/javascripts/katex.js
+++ b/zh-hant/javascripts/katex.js
@@ -8,4 +8,4 @@ document$.subscribe(({ body }) => {
     ],
   });
 });
-/*! update cache: 20260331211854 */
+/*! update cache: 20260331234957 */
diff --git a/zh-hant/javascripts/mathjax.js b/zh-hant/javascripts/mathjax.js
index 1a568a266..96e9b199b 100644
--- a/zh-hant/javascripts/mathjax.js
+++ b/zh-hant/javascripts/mathjax.js
@@ -15,4 +15,4 @@ window.MathJax = {
 document$.subscribe(() => {
   MathJax.typesetPromise();
 });
-/*! update cache: 20260331211854 */
+/*! update cache: 20260331234957 */
diff --git a/zh-hant/javascripts/starfield.js b/zh-hant/javascripts/starfield.js
index acb747230..5629de656 100644
--- a/zh-hant/javascripts/starfield.js
+++ b/zh-hant/javascripts/starfield.js
@@ -469,4 +469,4 @@
 
   return Starfield;
 });
-/*! update cache: 20260331211854 */
+/*! update cache: 20260331234957 */
diff --git a/zh-hant/stylesheets/animation_player.css b/zh-hant/stylesheets/animation_player.css
index 3b28a020f..57ae97e6d 100644
--- a/zh-hant/stylesheets/animation_player.css
+++ b/zh-hant/stylesheets/animation_player.css
@@ -176,4 +176,4 @@
     font-size: 0.7rem;
   }
 }
-/*! update cache: 20260331211854 */
+/*! update cache: 20260331234957 */
diff --git a/zh-hant/stylesheets/extra.css b/zh-hant/stylesheets/extra.css
index f9ebea1d0..bdc040c06 100644
--- a/zh-hant/stylesheets/extra.css
+++ b/zh-hant/stylesheets/extra.css
@@ -573,7 +573,7 @@ a:hover .device-on-hover {
 }
 
 .intro-text svg path {
-  fill: #3b3b3b;
+  fill: var(--md-primary-bg-color);
 }
 
 .endor-text {
@@ -713,4 +713,4 @@ a:hover .device-on-hover {
     flex: 1 1 30%;
   }
 }
-/*! update cache: 20260331211854 */
+/*! update cache: 20260331234957 */