diff --git a/components/canvas/CanvasChatPanel.tsx b/components/canvas/CanvasChatPanel.tsx
index 61a3d601f..9b097e441 100644
--- a/components/canvas/CanvasChatPanel.tsx
+++ b/components/canvas/CanvasChatPanel.tsx
@@ -9627,10 +9627,10 @@ export function CanvasChatPanel({
                     {message.role === 'user' ? (
                       <div
                         className={cn(
-                          "rounded-2xl px-3 py-2",
+                          "rounded-2xl border px-3 py-2 shadow-sm",
                           isVideoWorkspace
-                            ? "border border-border/60 bg-background/80 shadow-sm"
-                            : "bg-[#f1f2f4]"
+                            ? "border-border/60 bg-background/80 text-foreground"
+                            : "border-black/5 bg-[#f1f2f4] text-[#1f2937] dark:border-white/10 dark:bg-[#1b1f2a] dark:text-zinc-50"
                         )}
                       >
                         <div className="flex flex-wrap items-center gap-1.5">
@@ -9653,7 +9653,7 @@ export function CanvasChatPanel({
                                       "inline-flex items-center gap-1 rounded-xl px-2 py-1 text-xs",
                                       isVideoWorkspace
                                         ? "border border-border/60 bg-background"
-                                        : "bg-white/90"
+                                        : "border border-black/5 bg-white/90 text-[#334155] dark:border-white/10 dark:bg-white/10 dark:text-zinc-100"
                                     )}
                                   >
                                     <img
@@ -9668,7 +9668,7 @@ export function CanvasChatPanel({
                                         }
                                       }}
                                     />
-                                    <span className="max-w-[80px] truncate text-foreground">{part.name || 'Image'}</span>
+                                    <span className="max-w-[80px] truncate text-current">{part.name || 'Image'}</span>
                                   </span>
                                 );
                                 return;
@@ -9680,7 +9680,7 @@ export function CanvasChatPanel({
                                   .trim();
                                 if (!text) return;
                                 renderedUserParts.push(
-                                  <span key={`part-${idx}`} className="text-sm text-foreground">{text}</span>
+                                  <span key={`part-${idx}`} className="text-sm text-current">{text}</span>
                                 );
                               }
                             });
@@ -9694,7 +9694,7 @@ export function CanvasChatPanel({
                                 renderedUserParts.push(
                                   <span
                                     key={`att-${idx}`}
-                                    className="inline-flex items-center gap-1 rounded-xl bg-white/90 px-2 py-1 text-xs"
+                                    className="inline-flex items-center gap-1 rounded-xl border border-black/5 bg-white/90 px-2 py-1 text-xs text-[#334155] dark:border-white/10 dark:bg-white/10 dark:text-zinc-100"
                                   >
                                     <img
                                       src={buildPreviewImageUrl(att.url, 48)}
@@ -9708,7 +9708,7 @@ export function CanvasChatPanel({
                                         }
                                       }}
                                     />
-                                    <span className="max-w-[80px] truncate text-foreground">{att.name || 'Image'}</span>
+                                    <span className="max-w-[80px] truncate text-current">{att.name || 'Image'}</span>
                                   </span>
                                 );
                               });
@@ -9719,7 +9719,7 @@ export function CanvasChatPanel({
                                 extractUserTextPrompt(message as any) ||
                                 (isVideoModel ? "已发送视频生成请求" : "已发送请求");
                               renderedUserParts.push(
-                                <span key="fallback-text" className="text-sm text-foreground">
+                                <span key="fallback-text" className="text-sm text-current">
                                   {fallbackText}
                                 </span>
                               );
@@ -9733,7 +9733,7 @@ export function CanvasChatPanel({
                       <>
                         <div
                           className={cn(
-                            "min-w-0 max-w-full text-[15px] text-[#2f3640]",
+                            "min-w-0 max-w-full text-[15px] text-[#2f3640] dark:text-zinc-300",
                             isImageOnlyAssistant
                               ? "bg-transparent px-0 py-0"
                               : "bg-transparent px-0 py-0"
diff --git a/components/canvas/nodes/World3DNode.tsx b/components/canvas/nodes/World3DNode.tsx
index a281c787a..c6bb68f41 100644
--- a/components/canvas/nodes/World3DNode.tsx
+++ b/components/canvas/nodes/World3DNode.tsx
@@ -200,6 +200,10 @@ export function World3DNode({
     () => getNodeContentScale(node.size, { width: 420, height: 320 }, 0.76),
     [node.size.height, node.size.width]
   );
+  const overlayChromeScale = useMemo(
+    () => clampNumber(getNodeContentScale(node.size, { width: 420, height: 320 }, 0.48), 0.48, 1),
+    [node.size.height, node.size.width]
+  );
   const placeholderViewportScale = useMemo(
     () =>
       clampNumber(
@@ -223,6 +227,37 @@ export function World3DNode({
     }),
     [placeholderViewportScale]
   );
+  const topLeftControlsStyle = useMemo<React.CSSProperties>(
+    () => ({
+      transform: `scale(${overlayChromeScale})`,
+      transformOrigin: "top left",
+    }),
+    [overlayChromeScale]
+  );
+  const topRightControlsStyle = useMemo<React.CSSProperties>(
+    () => ({
+      transform: `scale(${overlayChromeScale})`,
+      transformOrigin: "top right",
+    }),
+    [overlayChromeScale]
+  );
+  const bottomOverlayStyle = useMemo<React.CSSProperties>(
+    () => ({
+      paddingLeft: `${12 * overlayChromeScale}px`,
+      paddingRight: `${12 * overlayChromeScale}px`,
+      paddingBottom: `${12 * overlayChromeScale}px`,
+      paddingTop: `${48 * overlayChromeScale}px`,
+    }),
+    [overlayChromeScale]
+  );
+  const bottomOverlayContentStyle = useMemo<React.CSSProperties>(
+    () => ({
+      transform: `scale(${overlayChromeScale})`,
+      transformOrigin: "bottom left",
+      width: `${100 / overlayChromeScale}%`,
+    }),
+    [overlayChromeScale]
+  );
   const captureEnabled = data.status === "completed" && (activeView === "splat" || activeView === "mesh");
 
   const handleSetView = (view: World3DViewMode) => {
@@ -457,8 +492,14 @@ export function World3DNode({
             />
           </div>
 
-          <div className="pointer-events-none absolute inset-x-0 bottom-0 bg-gradient-to-t from-black/85 via-black/45 to-transparent px-3 pb-3 pt-12">
-            <div className="flex items-end justify-between gap-3">
+          <div
+            className="pointer-events-none absolute inset-x-0 bottom-0 bg-gradient-to-t from-black/85 via-black/45 to-transparent"
+            style={bottomOverlayStyle}
+          >
+            <div
+              className="flex items-end justify-between gap-3"
+              style={bottomOverlayContentStyle}
+            >
               <div className="min-w-0">
                 <p className="truncate text-sm font-medium text-white">
                   {data.prompt || "3D 世界"}
@@ -485,7 +526,10 @@ export function World3DNode({
         </>
       )}
 
-      <div className="absolute left-3 top-3 z-20 flex items-center gap-2">
+      <div
+        className="absolute left-3 top-3 z-20 flex items-center gap-2"
+        style={topLeftControlsStyle}
+      >
         <div className="flex rounded-full border border-white/10 bg-black/55 p-1 backdrop-blur-sm">
           {VIEW_META.filter((view) => availableViews.includes(view.id)).map((view) => (
             (() => {
@@ -569,7 +613,10 @@ export function World3DNode({
       </div>
 
       {isHovered && data.status === "completed" && (
-        <div className="absolute right-3 top-3 z-20 flex items-center gap-1">
+        <div
+          className="absolute right-3 top-3 z-20 flex items-center gap-1"
+          style={topRightControlsStyle}
+        >
           <DropdownMenu>
             <DropdownMenuTrigger asChild>
               <Button
diff --git a/components/canvas/world3d/World3DViewer.tsx b/components/canvas/world3d/World3DViewer.tsx
index b24436750..4a68990aa 100644
--- a/components/canvas/world3d/World3DViewer.tsx
+++ b/components/canvas/world3d/World3DViewer.tsx
@@ -1018,6 +1018,7 @@ function WorldSplatCaptureBridge({
 
 function WorldSplatViewer({
   splatUrl,
+  worldUrl,
   previewImageUrl,
   firstPerson,
   hotspots,
@@ -1029,6 +1030,7 @@ function WorldSplatViewer({
   onCaptureReady,
 }: {
   splatUrl?: string | null;
+  worldUrl?: string | null;
   previewImageUrl?: string | null;
   firstPerson?: boolean;
   hotspots?: World3DHotspot[];
@@ -1062,6 +1064,21 @@ function WorldSplatViewer({
   }, [loadState]);
 
   if (!splatUrl) {
+    if (worldUrl) {
+      return (
+        <div className="h-full w-full overflow-hidden bg-zinc-950">
+          <iframe
+            allow="accelerometer; autoplay; clipboard-read; clipboard-write; fullscreen; gyroscope; xr-spatial-tracking"
+            allowFullScreen
+            className="h-full w-full border-0"
+            referrerPolicy="no-referrer-when-downgrade"
+            src={worldUrl}
+            title="3D 世界在线预览"
+          />
+        </div>
+      );
+    }
+
     return (
       <WorldEmptyState
         description="当前结果没有返回可用的世界数据。"
@@ -1073,6 +1090,21 @@ function WorldSplatViewer({
   }
 
   if (loadState === "error") {
+    if (worldUrl) {
+      return (
+        <div className="h-full w-full overflow-hidden bg-zinc-950">
+          <iframe
+            allow="accelerometer; autoplay; clipboard-read; clipboard-write; fullscreen; gyroscope; xr-spatial-tracking"
+            allowFullScreen
+            className="h-full w-full border-0"
+            referrerPolicy="no-referrer-when-downgrade"
+            src={worldUrl}
+            title="3D 世界在线预览"
+          />
+        </div>
+      );
+    }
+
     return (
       <WorldEmptyState
         description="当前世界数据暂时无法加载，可以切换到图像或 Mesh 视图继续查看。"
@@ -1223,6 +1255,7 @@ export function World3DViewer({
         resetViewToken={resetViewToken}
         semanticsMetadata={semanticsMetadata}
         splatUrl={splatUrl}
+        worldUrl={worldUrl}
       />
     </div>
   );
diff --git a/components/home/lovart-home.tsx b/components/home/lovart-home.tsx
index 7e1ada1a1..1b3371221 100644
--- a/components/home/lovart-home.tsx
+++ b/components/home/lovart-home.tsx
@@ -25,12 +25,14 @@ import {
   LogOut,
   Mail,
   Monitor,
+  Moon,
   Palette,
   Plus,
   PlayCircle,
   Settings,
   Sparkles,
   Star,
+  Sun,
   Trash2,
   Upload,
   User,
@@ -44,6 +46,13 @@ import {
 import { toast } from "sonner";
 import { Button } from "@/components/ui/button";
 import { Dialog, DialogContent, DialogHeader, DialogTitle } from "@/components/ui/dialog";
+import {
+  DropdownMenu,
+  DropdownMenuContent,
+  DropdownMenuItem,
+  DropdownMenuLabel,
+  DropdownMenuTrigger,
+} from "@/components/ui/dropdown-menu";
 import { HoverCard, HoverCardContent, HoverCardTrigger } from "@/components/ui/hover-card";
 import { Tooltip, TooltipContent, TooltipProvider, TooltipTrigger } from "@/components/ui/tooltip";
 import { ImageParamsBar, type ImageGenerationParams } from "@/components/image-params-bar";
@@ -235,6 +244,34 @@ type UploadFileItem = {
   previewUrl: string;
 };
 
+type ThemeMode = "system" | "light" | "dark";
+
+const THEME_MODE_OPTIONS: Array<{
+  value: ThemeMode;
+  label: string;
+  description: string;
+  icon: LucideIcon;
+}> = [
+  {
+    value: "system",
+    label: "跟随系统",
+    description: "随浏览器/系统深浅色自动切换",
+    icon: Monitor,
+  },
+  {
+    value: "light",
+    label: "浅色模式",
+    description: "始终使用明亮界面",
+    icon: Sun,
+  },
+  {
+    value: "dark",
+    label: "深色模式",
+    description: "始终使用暗色界面",
+    icon: Moon,
+  },
+];
+
 const DISCOVERY_DEFAULT_TABS = [
   "品牌设计",
   "海报与广告",
@@ -395,7 +432,7 @@ export function LovartHome({
   heroSubtitleText,
 }: LovartHomeProps) {
   const router = useRouter();
-  const { resolvedTheme } = useTheme();
+  const { theme, resolvedTheme, setTheme } = useTheme();
   const displayLogo =
     resolvedTheme === "dark"
       ? siteLogoDark?.trim() || siteLogo?.trim() || ""
@@ -1349,6 +1386,12 @@ export function LovartHome({
         accountCenterData?.profile?.dailyFreeCredits ?? membershipData?.summary?.dailyFreeCredits ?? 0,
     };
   }, [accountCenterData?.profile, currentPlan?.monthlyCredits, currentPlan?.name, membershipData?.summary?.currentCredits, membershipData?.summary?.dailyFreeCredits, user?.email, userDisplayName]);
+  const selectedThemeMode: ThemeMode =
+    theme === "light" || theme === "dark" || theme === "system" ? theme : "system";
+  const selectedThemeOption =
+    THEME_MODE_OPTIONS.find((option) => option.value === selectedThemeMode) ||
+    THEME_MODE_OPTIONS[0];
+  const SelectedThemeIcon = selectedThemeOption.icon;
 
   return (
     <div className="min-h-svh bg-[#f4f4f4] text-[#171717] dark:bg-[#0a0a0c] dark:text-zinc-100 [&_button]:cursor-pointer [&_input]:cursor-pointer [&_textarea]:cursor-pointer [&_img]:cursor-pointer [&_a]:cursor-pointer [&_[role=button]]:cursor-pointer">
@@ -1444,6 +1487,73 @@ export function LovartHome({
               </HoverCard>
             ) : null}
 
+            <DropdownMenu>
+              <DropdownMenuTrigger asChild>
+                <button
+                  type="button"
+                  className="inline-flex h-8 items-center gap-1.5 rounded-[14px] border border-black/10 bg-white px-2.5 text-[12px] font-medium text-black/70 shadow-sm transition hover:bg-black/5 hover:text-black dark:border-white/10 dark:bg-white/6 dark:text-white/72 dark:hover:bg-white/10 dark:hover:text-white"
+                  title={`主题模式：${selectedThemeOption.label}`}
+                  aria-label={`主题模式：${selectedThemeOption.label}`}
+                >
+                  <SelectedThemeIcon className="h-3.5 w-3.5" />
+                  <span className="hidden sm:inline">{selectedThemeOption.label}</span>
+                  <ChevronDown className="h-3.5 w-3.5 opacity-55" />
+                </button>
+              </DropdownMenuTrigger>
+              <DropdownMenuContent
+                align="end"
+                sideOffset={10}
+                className="w-[220px] rounded-2xl border-black/10 bg-white p-1.5 shadow-xl dark:border-white/10 dark:bg-[#141416]"
+              >
+                <DropdownMenuLabel className="px-3 py-2 text-[12px] text-black/45 dark:text-white/45">
+                  个人主题模式
+                </DropdownMenuLabel>
+                {THEME_MODE_OPTIONS.map((option) => {
+                  const OptionIcon = option.icon;
+                  const isSelected = selectedThemeMode === option.value;
+
+                  return (
+                    <DropdownMenuItem
+                      key={option.value}
+                      className={cn(
+                        "flex cursor-pointer items-center gap-3 rounded-xl px-3 py-2 text-left focus:bg-black/5 dark:focus:bg-white/8",
+                        isSelected
+                          ? "bg-black text-white focus:bg-black focus:text-white dark:bg-white dark:text-black dark:focus:bg-white dark:focus:text-black"
+                          : "text-black/78 dark:text-white/78"
+                      )}
+                      onSelect={() => setTheme(option.value)}
+                    >
+                      <span
+                        className={cn(
+                          "flex h-8 w-8 items-center justify-center rounded-xl",
+                          isSelected
+                            ? "bg-white/14 text-white dark:bg-black/8 dark:text-black"
+                            : "bg-black/5 text-black/65 dark:bg-white/8 dark:text-white/65"
+                        )}
+                      >
+                        <OptionIcon className="h-4 w-4" />
+                      </span>
+                      <span className="min-w-0 flex-1">
+                        <span className="block text-[13px] font-semibold leading-4">
+                          {option.label}
+                        </span>
+                        <span
+                          className={cn(
+                            "mt-0.5 block text-[11px] leading-4",
+                            isSelected
+                              ? "text-white/70 dark:text-black/60"
+                              : "text-black/45 dark:text-white/42"
+                          )}
+                        >
+                          {option.description}
+                        </span>
+                      </span>
+                    </DropdownMenuItem>
+                  );
+                })}
+              </DropdownMenuContent>
+            </DropdownMenu>
+
             {isAuthenticated ? (
               <HoverCard openDelay={80} closeDelay={120}>
                 <HoverCardTrigger asChild>