diff --git a/themes/Ying/assets/css/main.css b/themes/Ying/assets/css/main.css
index 3d72bd6f..de415ad8 100644
--- a/themes/Ying/assets/css/main.css
+++ b/themes/Ying/assets/css/main.css
@@ -2989,18 +2989,24 @@ input[type=submit] {
     max-width: 100%;
     margin: 1.2rem auto;
     line-height: 0;
-    opacity: 0;
-    transform: translateY(14px);
+    opacity: 1;
+    transform: none;
     transition: opacity 0.6s cubic-bezier(0.22, 0.61, 0.36, 1),
                 transform 0.6s cubic-bezier(0.22, 0.61, 0.36, 1);
     content-visibility: auto;
     contain-intrinsic-size: auto 400px;
 }
 
+.post-content .sen-image-frame.reveal-pending:not(.is-visible),
+.entry-content .sen-image-frame.reveal-pending:not(.is-visible) {
+    opacity: 0;
+    transform: translateY(14px);
+}
+
 .post-content .sen-image-frame.is-visible,
 .entry-content .sen-image-frame.is-visible {
     opacity: 1;
-    transform: translateY(0);
+    transform: none;
 }
 
 .post-content .sen-image-frame>img,
diff --git a/themes/Ying/assets/js/main.js b/themes/Ying/assets/js/main.js
index c1adb3ff..e7e0023c 100644
--- a/themes/Ying/assets/js/main.js
+++ b/themes/Ying/assets/js/main.js
@@ -91,6 +91,10 @@ function initImageFrameReveal() {
         return;
     }
 
+    frames.forEach(function(frame) {
+        frame.classList.add('reveal-pending');
+    });
+
     if (senFrameObserver) {
         senFrameObserver.disconnect();
     }
diff --git a/themes/Ying/assets/js/modules/artalk.js b/themes/Ying/assets/js/modules/artalk.js
index 710ca0ce..2ea5a0ed 100644
--- a/themes/Ying/assets/js/modules/artalk.js
+++ b/themes/Ying/assets/js/modules/artalk.js
@@ -1,19 +1,40 @@
 // Global Artalk Initialization Function (Supports PJAX)
+window.loadScriptOnce = window.loadScriptOnce || function(src, globalName, callback) {
+    if (globalName && window[globalName]) {
+        callback();
+        return;
+    }
+
+    var existing = document.querySelector('script[data-dynamic-src="' + src + '"]');
+    if (existing) {
+        existing.addEventListener('load', callback, { once: true });
+        return;
+    }
+
+    var script = document.createElement('script');
+    script.src = src;
+    script.defer = true;
+    script.dataset.dynamicSrc = src;
+    script.onload = callback;
+    document.head.appendChild(script);
+};
+
 window.initArtalk = function() {
     if (!document.querySelector("#Comments")) return;
-    
+
     // Check if configuration exists
     if (!window.artalkConfig) {
         console.warn('window.artalkConfig is not defined. Skipping Artalk init.');
         return;
     }
 
-    // Check if Artalk library is loaded
     if (typeof Artalk === 'undefined') {
-        console.warn('Artalk library is not loaded yet. Waiting for bundle...');
+        var artalkUrl = window.optionalAssetUrls && window.optionalAssetUrls.artalk;
+        if (!artalkUrl) return;
+        window.loadScriptOnce(artalkUrl, 'Artalk', window.initArtalk);
         return;
     }
-    
+
     try {
         // Logic for caching Artalk configuration to speed up rendering
         // 1. Manual Refresh (F5): Request from server and save to localStorage
@@ -195,19 +216,11 @@ window.initArtalk = function() {
 
             // Force hide "No Comment" if AI comment exists
             if (window.artalkConfig.aiComment) {
-                var checkNoComment = setInterval(function() {
-                    var noComment = document.querySelector('.atk-list-no-comment');
-                    var aiComment = document.querySelector('.atk-ai-comment');
-                    if (aiComment && noComment && noComment.style.display !== 'none') {
-                        noComment.style.display = 'none';
-                    }
-                    if (!document.querySelector('#Comments')) {
-                        clearInterval(checkNoComment);
-                    }
-                }, 500);
-                
-                // Clear interval after 10 seconds to save resources
-                setTimeout(function() { clearInterval(checkNoComment); }, 10000);
+                var noComment = document.querySelector('.atk-list-no-comment');
+                var aiComment = document.querySelector('.atk-ai-comment');
+                if (aiComment && noComment) {
+                    noComment.style.display = 'none';
+                }
             }
         });
         
diff --git a/themes/Ying/assets/js/modules/floating-tools.js b/themes/Ying/assets/js/modules/floating-tools.js
index 06a10c81..72812905 100644
--- a/themes/Ying/assets/js/modules/floating-tools.js
+++ b/themes/Ying/assets/js/modules/floating-tools.js
@@ -1,3 +1,19 @@
+window.refreshFloatingTools = function() {
+    if (typeof window.initFloatingTools !== 'function') return;
+    var delays = [0, 60, 180];
+    delays.forEach(function(delay) {
+        setTimeout(function() {
+            requestAnimationFrame(function() {
+                try {
+                    window.initFloatingTools();
+                } catch (e) {
+                    console.error('initFloatingTools error:', e);
+                }
+            });
+        }, delay);
+    });
+};
+
 window.initFloatingTools = function() {
     try {
         // 0. Global Toolbar Visibility (Homepage Check)
@@ -7,29 +23,21 @@ window.initFloatingTools = function() {
         // 1. Check for Homepage-specific element (.recent-posts)
         // 2. Ensure NOT on a Post page (.post-content)
         // 3. Fallback: Check pathname (only if DOM check is ambiguous)
-        var hasRecentPosts = document.querySelector('.recent-posts');
-        var hasPostContent = document.querySelector('.post-content');
-        
-        var isHomePage = false;
-        if (hasRecentPosts && !hasPostContent) {
-            isHomePage = true;
-        } else if (!hasRecentPosts && !hasPostContent) {
-            // Could be Archive or Custom Page. Check Path.
-            var path = window.location.pathname;
-            if (path === '/' || path === '/index.html' || path.startsWith('/page/')) {
-                isHomePage = true;
-            }
-        }
+        var pjaxContainer = document.getElementById('pjax-container');
+        var hasRecentPosts = !!(pjaxContainer && pjaxContainer.querySelector('.recent-posts'));
+        var hasArticle = !!(pjaxContainer && (pjaxContainer.querySelector('#post-writing') || pjaxContainer.querySelector('#Comments')));
+        var path = window.location.pathname;
+        var isHomePage = !hasArticle && (hasRecentPosts || path === '/' || path === '/index.html' || path.startsWith('/page/'));
 
         if (container) {
             if (isHomePage) {
                 container.style.display = 'none';
-                // Do not return here, let other logic run in case we need to reset state
-                // But for performance, we can skip binding if hidden? 
-                // No, better to bind so if it becomes visible later (unlikely without PJAX) it works.
-                // Actually, with PJAX, this function runs again. So we can just hide it.
             } else {
-                container.style.display = ''; // Restore display
+                container.style.display = 'flex';
+                container.classList.remove('hidden');
+                container.style.visibility = 'visible';
+                container.style.opacity = '1';
+                container.style.pointerEvents = 'auto';
             }
         }
 
@@ -55,18 +63,19 @@ window.initFloatingTools = function() {
             }
 
             if (window.IntersectionObserver) {
-                var observer = new IntersectionObserver(function(entries) {
+                if (window.backToTopObserver) {
+                    window.backToTopObserver.disconnect();
+                }
+                window.backToTopObserver = new IntersectionObserver(function(entries) {
                     entries.forEach(function(entry) {
                         if (!entry.isIntersecting) {
-                            // Sentinel is out of view (scrolled down past 300px)
                             backToTopButton.classList.add('show');
                         } else {
-                            // Sentinel is in view (near top)
                             backToTopButton.classList.remove('show');
                         }
                     });
                 });
-                observer.observe(sentinel);
+                window.backToTopObserver.observe(sentinel);
             } else {
                 // Fallback for very old browsers
                 var ticking = false;
@@ -207,18 +216,32 @@ window.initFloatingTools = function() {
             window.lightboxObserver.disconnect();
         }
 
-        if (container) {
+        if (container && !isHomePage) {
+            var lightboxToolsHidden = null;
             var syncLightboxState = function() {
                 var lightbox = document.querySelector('.view-image');
+                var lightboxOpen = false;
                 if (lightbox) {
+                    var rect = lightbox.getBoundingClientRect();
+                    var style = window.getComputedStyle(lightbox);
+                    lightboxOpen = style.display !== 'none' && style.visibility !== 'hidden' && style.opacity !== '0' && rect.width > 0 && rect.height > 0;
+                }
+                if (lightboxToolsHidden === lightboxOpen) return;
+                lightboxToolsHidden = lightboxOpen;
+
+                if (lightboxOpen) {
                     container.classList.add('hidden');
                 } else {
                     container.classList.remove('hidden');
+                    container.style.display = 'flex';
+                    container.style.visibility = 'visible';
+                    container.style.opacity = '1';
+                    container.style.pointerEvents = 'auto';
                 }
             };
 
             window.lightboxObserver = new MutationObserver(function() {
-                syncLightboxState();
+                requestAnimationFrame(syncLightboxState);
             });
 
             window.lightboxObserver.observe(document.body, { childList: true, subtree: true });
diff --git a/themes/Ying/assets/js/modules/mypjax.js b/themes/Ying/assets/js/modules/mypjax.js
index 8c3b63b7..4791ff5c 100644
--- a/themes/Ying/assets/js/modules/mypjax.js
+++ b/themes/Ying/assets/js/modules/mypjax.js
@@ -87,6 +87,10 @@ document.addEventListener("pjax:success", function () {
     if (window.ViewImage) {
         ViewImage.init('.post-content img');
     }
+
+    if (typeof window.refreshFloatingTools === 'function') {
+        window.refreshFloatingTools();
+    }
 });
 
 // pjax加载完成
@@ -141,10 +145,14 @@ document.addEventListener("pjax:complete", function () {
     }
     
     // 重载 Search 和 Floating Tools (Moved from main.js)
-    if (typeof window.initFloatingTools === 'function') {
-        try {
-            window.initFloatingTools();
-        } catch(e) { console.error('initFloatingTools error:', e); }
+    if (typeof window.refreshFloatingTools === 'function') {
+        window.refreshFloatingTools();
+    } else if (typeof window.initFloatingTools === 'function') {
+        requestAnimationFrame(function() {
+            try {
+                window.initFloatingTools();
+            } catch(e) { console.error('initFloatingTools error:', e); }
+        });
     }
     if (typeof window.initSearch === 'function') {
         try {
diff --git a/themes/Ying/assets/js/modules/utils.js b/themes/Ying/assets/js/modules/utils.js
index 81756dbe..0f77b14b 100644
--- a/themes/Ying/assets/js/modules/utils.js
+++ b/themes/Ying/assets/js/modules/utils.js
@@ -1,25 +1,43 @@
-// Sheet reveal — new theme slides in, covering old theme like pulling a curtain
 function themeSweep(newTheme, callback) {
-    var isH = Math.random() < 0.5;
+    var veil = document.createElement('div');
+    var gradient = newTheme === 'dark'
+        ? 'linear-gradient(135deg,rgba(2,6,23,0.18),rgba(15,23,42,0.55) 45%,rgba(30,41,59,0.36))'
+        : 'linear-gradient(135deg,rgba(255,247,237,0.28),rgba(252,250,245,0.62) 45%,rgba(254,243,199,0.32))';
 
-    var blank = newTheme === 'dark' ? '#111827' : '#fcfaf5';
-    var sheet = document.createElement('div');
-    sheet.style.cssText =
-        'position:fixed;inset:0;z-index:9999;' +
-        'background:' + blank + ';' +
-        'clip-path:inset(0 0 0 0);' +
-        'transition:clip-path 1.2s cubic-bezier(0.4,0,0.2,1);' +
-        'will-change:clip-path;';
-    document.body.appendChild(sheet);
+    veil.style.cssText =
+        'position:fixed;inset:0;z-index:9999;pointer-events:none;' +
+        'background:' + gradient + ';' +
+        'opacity:0;transition:opacity 0.42s cubic-bezier(0.22,0.61,0.36,1);' +
+        'will-change:opacity;contain:paint;';
+    document.body.appendChild(veil);
 
-    sheet.offsetWidth;
-    callback();
+    var cleaned = false;
+    function cleanup() {
+        if (cleaned) return;
+        cleaned = true;
+        if (veil.parentNode) veil.parentNode.removeChild(veil);
+    }
 
-    sheet.style.clipPath = isH ? 'inset(0 0 0 100%)' : 'inset(100% 0 0 0)';
+    var applied = false;
+    function applyTheme() {
+        if (applied) return;
+        applied = true;
+        callback();
+        veil.style.opacity = '0';
+    }
 
-    sheet.addEventListener('transitionend', function() {
-        if (sheet.parentNode) sheet.parentNode.removeChild(sheet);
+    veil.offsetWidth;
+    veil.style.opacity = '1';
+
+    setTimeout(applyTheme, 300);
+    veil.addEventListener('transitionend', function(e) {
+        if (!applied || e.propertyName !== 'opacity') return;
+        cleanup();
     });
+    setTimeout(function() {
+        applyTheme();
+        cleanup();
+    }, 950);
 }
 
 // Toast Message Helper
diff --git a/themes/Ying/layouts/_default/_markup/render-image.html b/themes/Ying/layouts/_default/_markup/render-image.html
index 2f1d43f1..356e2ef7 100644
--- a/themes/Ying/layouts/_default/_markup/render-image.html
+++ b/themes/Ying/layouts/_default/_markup/render-image.html
@@ -14,6 +14,6 @@
     {{- $src = $src | relURL -}}
   {{- end -}}
 {{- end -}}
-<span class="sen-image-frame sen-media-host"{{ with $alt }} data-title="{{ . }}"{{ end }}>
-  <img src="{{ $src }}" alt="{{ $alt }}"{{ with $alt }} title="{{ . }}"{{ end }} class="lazyload lazy-loaded" loading="lazy" decoding="async"{{ with $width }} width="{{ . }}"{{ end }}{{ with $height }} height="{{ . }}"{{ end }}>
+<span class="sen-image-frame sen-media-host">
+  <img src="{{ $src }}" alt="{{ $alt }}" class="lazyload lazy-loaded" loading="lazy" decoding="async"{{ with $width }} width="{{ . }}"{{ end }}{{ with $height }} height="{{ . }}"{{ end }}>
 </span>
\ No newline at end of file
diff --git a/themes/Ying/layouts/partials/artalk.html b/themes/Ying/layouts/partials/artalk.html
index e7518a64..445309ad 100644
--- a/themes/Ying/layouts/partials/artalk.html
+++ b/themes/Ying/layouts/partials/artalk.html
@@ -1,5 +1,5 @@
-<!-- CSS -->
-<!-- <link href="/css/Artalk.css" rel="stylesheet" /> -->
+{{ $artalkCss := resources.Get "css/libs/Artalk.css" | resources.Minify | resources.Fingerprint }}
+<link id="artalk-css" rel="stylesheet" href="{{ $artalkCss.RelPermalink }}">
 <style>
     .atk-loading{
         background: #FFFFFF;
diff --git a/themes/Ying/layouts/partials/footer.html b/themes/Ying/layouts/partials/footer.html
index 235b36e5..9c26bbd5 100644
--- a/themes/Ying/layouts/partials/footer.html
+++ b/themes/Ying/layouts/partials/footer.html
@@ -58,9 +58,6 @@
 {{ $tiaozhuan := resources.Get "js/modules/tiaozhuan.js" }}
 {{ $toast := resources.Get "js/modules/toast.js" }}
 {{ $reward := resources.Get "js/modules/reward.js" }}
-{{ $echarts := resources.Get "js/libs/echarts.min.js" }}
-{{ $artalk := resources.Get "js/libs/Artalk.js" }}
-
 {{/* Modules */}}
 {{ $utils := resources.Get "js/modules/utils.js" }}
 {{ $loader := resources.Get "js/modules/loader.js" }}
@@ -72,17 +69,16 @@
 {{ $artalkModule := resources.Get "js/modules/artalk.js" }}
 {{ $pjaxLib := resources.Get "js/libs/pjax.js" }}
 
-{{ $scripts := slice $iconfont $uikit $easylazyload $viewimage $barrage $utils $loader $cache $search $floatingTools $paragraphComments $infiniteScroll $artalkModule $nprogress $pjaxLib $main $mypjax $toast $tiaozhuan $reward $echarts $artalk | resources.Concat "js/bundle.js" | resources.Minify | resources.Fingerprint }}
+{{ $scripts := slice $iconfont $uikit $easylazyload $viewimage $barrage $utils $loader $cache $search $floatingTools $paragraphComments $infiniteScroll $artalkModule $nprogress $pjaxLib $main $mypjax $toast $tiaozhuan $reward | resources.Concat "js/bundle.js" | resources.Minify | resources.Fingerprint }}
 
   {{ $aiGreetings := "static/js/ai_greetings.js" }}
   {{ if os.FileExists $aiGreetings }}
   <script defer src="/js/ai_greetings.js"></script>
   {{ end }}
-  <script defer src="{{ $scripts.RelPermalink }}"></script>
   <script>
-    // Global configuration from Hugo
     window.enableInfiniteScroll = {{ .Site.Params.infiniteScroll.enable | default false }};
   </script>
+  <script defer src="{{ $scripts.RelPermalink }}"></script>
   <script async src="/js/bsz.js"></script>
 </body>
 
diff --git a/themes/Ying/layouts/partials/head.html b/themes/Ying/layouts/partials/head.html
index c0000d08..d1813d75 100644
--- a/themes/Ying/layouts/partials/head.html
+++ b/themes/Ying/layouts/partials/head.html
@@ -73,8 +73,34 @@
   <link rel="preload" href="{{ "font/zql-v2.woff2" | relURL }}" as="font" type="font/woff2" crossorigin>
   <link rel="preload" href="{{ "font/remixicon.woff2" | relURL }}" as="font" type="font/woff2" crossorigin>
 
+  {{ $echartsHead := resources.Get "js/libs/echarts.min.js" | resources.Fingerprint }}
+  {{ $artalkHead := resources.Get "js/libs/Artalk.js" | resources.Fingerprint }}
+
   <!-- Site Configuration -->
   <script>
+    window.optionalAssetUrls = {
+      echarts: {{ $echartsHead.RelPermalink | jsonify | safeJS }},
+      artalk: {{ $artalkHead.RelPermalink | jsonify | safeJS }}
+    };
+
+    window.loadScriptOnce = window.loadScriptOnce || function(src, globalName, callback) {
+      if (globalName && window[globalName]) {
+        callback();
+        return;
+      }
+      var existing = document.querySelector('script[data-dynamic-src="' + src + '"]');
+      if (existing) {
+        existing.addEventListener('load', callback, { once: true });
+        return;
+      }
+      var script = document.createElement('script');
+      script.src = src;
+      script.defer = true;
+      script.dataset.dynamicSrc = src;
+      script.onload = callback;
+      document.head.appendChild(script);
+    };
+
     window.siteConfig = {
       artalk: {
         server: "{{ .Site.Params.artalk.server }}",
@@ -102,10 +128,7 @@
   {{ $main := resources.Get "css/main.css" }}
 
   {{ $style := slice $normalize $remixicon $uikit $nprogress $message $main | resources.Concat "css/style.css" | resources.Minify | resources.Fingerprint }}
-  {{ $artalk := resources.Get "css/libs/Artalk.css" | resources.Minify | resources.Fingerprint }}
-
   <link rel="stylesheet" href="{{ $style.RelPermalink }}">
-  <link rel="stylesheet" href="{{ $artalk.RelPermalink }}">
   
   {{- if and .Site.Params.style.enableBackgroundImage .Site.Params.style.backgroundImageUrl -}}
 <style>
@@ -116,6 +139,11 @@
     background-position: {{ .Site.Params.style.backgroundPosition | default "center" }} !important;
     background-attachment: {{ .Site.Params.style.backgroundAttachment | default "fixed" }} !important;
   }
+  @media (max-width: 768px) {
+    body, [data-theme="dark"] body {
+      background-attachment: scroll !important;
+    }
+  }
 </style>
 {{- end -}}
 
diff --git a/themes/Ying/layouts/partials/heatmap.html b/themes/Ying/layouts/partials/heatmap.html
index 658ef05e..864d04ca 100644
--- a/themes/Ying/layouts/partials/heatmap.html
+++ b/themes/Ying/layouts/partials/heatmap.html
@@ -179,11 +179,8 @@
   // Initial render
   if (window.echarts) {
       renderHeatmap();
-  } else {
-      // Retry a few times if script is still loading
-      setTimeout(renderHeatmap, 500);
-      setTimeout(renderHeatmap, 1500);
-      setTimeout(renderHeatmap, 3000);
+  } else if (window.optionalAssetUrls && window.optionalAssetUrls.echarts && window.loadScriptOnce) {
+      window.loadScriptOnce(window.optionalAssetUrls.echarts, 'echarts', renderHeatmap);
   }
 
   // Re-render on theme change