diff --git a/components/canvas/RealtimeCanvasDialog.tsx b/components/canvas/RealtimeCanvasDialog.tsx
index cf45c9433..ba6f710fd 100644
--- a/components/canvas/RealtimeCanvasDialog.tsx
+++ b/components/canvas/RealtimeCanvasDialog.tsx
@@ -612,75 +612,89 @@ export function RealtimeCanvasDialog({
 
   return (
     <Dialog open={open} onOpenChange={onOpenChange}>
-      <DialogContent className="h-[88vh] w-[95vw] max-w-[1400px] overflow-hidden rounded-2xl border border-zinc-200 bg-[#f6f7f8] p-0">
-        <DialogHeader className="border-b border-zinc-200 px-5 py-3">
-          <div className="flex items-center justify-between gap-3">
+      <DialogContent className="h-[90vh] w-[96vw] max-w-[1540px] overflow-hidden rounded-[24px] border border-zinc-200/80 bg-[#f2f3f5] p-0 shadow-2xl">
+        <DialogHeader className="border-b border-zinc-200/80 bg-white/70 px-6 py-4 backdrop-blur">
+          <div className="flex items-start justify-between gap-4">
             <div>
-              <DialogTitle className="text-[17px] font-semibold text-zinc-900">实时画布</DialogTitle>
-              <DialogDescription className="text-[12px] text-zinc-500">
-                左侧画草图，右侧实时预览，底部输入提示词后持续渲染
+              <DialogTitle className="text-[24px] font-semibold tracking-tight text-zinc-900">
+                实时画布
+              </DialogTitle>
+              <DialogDescription className="mt-1 text-[13px] text-zinc-500">
+                左侧绘制草图，右侧实时渲染，整体风格与无限画布保持一致
               </DialogDescription>
+              <div className="mt-2 text-[12px] text-zinc-500">{statusMessage}</div>
             </div>
             <div className="flex items-center gap-2">
               <span
                 className={cn(
-                  "inline-flex items-center rounded-full px-2.5 py-1 text-[11px] font-medium",
+                  "inline-flex h-9 items-center gap-1.5 rounded-full px-3 text-[12px] font-medium",
                   statusBadge.className
                 )}
               >
-                {status === "error" ? <WifiOff className="mr-1 h-3.5 w-3.5" /> : <Wifi className="mr-1 h-3.5 w-3.5" />}
+                {status === "error" ? <WifiOff className="h-3.5 w-3.5" /> : <Wifi className="h-3.5 w-3.5" />}
                 {statusBadge.label}
               </span>
-              <Button type="button" variant="outline" size="sm" onClick={forceReconnect}>
-                <RefreshCw className="mr-1 h-3.5 w-3.5" />
+              <Button
+                type="button"
+                variant="outline"
+                size="sm"
+                onClick={forceReconnect}
+                className="h-9 rounded-xl border-zinc-300 bg-white px-3"
+              >
+                <RefreshCw className="mr-1.5 h-3.5 w-3.5" />
                 重连
               </Button>
             </div>
           </div>
-          <div className="mt-1 text-[11px] text-zinc-500">{statusMessage}</div>
         </DialogHeader>
 
-        <div className="flex min-h-0 flex-1 flex-col">
-          <div className="grid min-h-0 flex-1 grid-cols-2 gap-3 px-4 py-3">
-            <div className="flex min-h-0 flex-col rounded-xl border border-zinc-200 bg-white/85">
-              <div className="flex items-center justify-between border-b border-zinc-200 px-3 py-2">
-                <span className="text-[12px] font-medium text-zinc-700">草图画布</span>
+        <div className="flex min-h-0 flex-1 flex-col px-5 pb-5 pt-4">
+          <div className="grid min-h-0 flex-1 grid-cols-2 gap-4">
+            <div className="flex min-h-0 flex-col overflow-hidden rounded-2xl border border-zinc-200 bg-white/95 shadow-sm">
+              <div className="flex h-12 items-center justify-between border-b border-zinc-200 px-4">
+                <span className="text-[15px] font-medium text-zinc-800">草图画布</span>
                 <div className="flex items-center gap-1.5">
                   <Button
                     type="button"
                     size="icon"
                     variant={brushMode === "brush" ? "default" : "outline"}
-                    className="h-7 w-7"
+                    className="h-8 w-8 rounded-lg"
                     onClick={() => setBrushMode("brush")}
                   >
-                    <Paintbrush className="h-3.5 w-3.5" />
+                    <Paintbrush className="h-4 w-4" />
                   </Button>
                   <Button
                     type="button"
                     size="icon"
                     variant={brushMode === "eraser" ? "default" : "outline"}
-                    className="h-7 w-7"
+                    className="h-8 w-8 rounded-lg"
                     onClick={() => setBrushMode("eraser")}
                   >
-                    <Eraser className="h-3.5 w-3.5" />
+                    <Eraser className="h-4 w-4" />
                   </Button>
-                  <Button type="button" size="icon" variant="outline" className="h-7 w-7" onClick={clearSketch}>
-                    <Trash2 className="h-3.5 w-3.5" />
+                  <Button
+                    type="button"
+                    size="icon"
+                    variant="outline"
+                    className="h-8 w-8 rounded-lg"
+                    onClick={clearSketch}
+                  >
+                    <Trash2 className="h-4 w-4" />
                   </Button>
                 </div>
               </div>
-              <div ref={canvasWrapRef} className="min-h-0 flex-1 bg-[#d8d8db] p-2">
+              <div ref={canvasWrapRef} className="min-h-0 flex-1 bg-[#d0d1d4] p-3">
                 <canvas
                   ref={canvasRef}
-                  className="h-full w-full touch-none rounded-md border border-zinc-300 bg-[#d8d8db]"
+                  className="h-full w-full touch-none rounded-xl border border-zinc-300/80 bg-[#d0d1d4]"
                   onPointerDown={handlePointerDown}
                   onPointerMove={handlePointerMove}
                   onPointerUp={handlePointerUp}
                   onPointerCancel={handlePointerUp}
                 />
               </div>
-              <div className="flex items-center gap-2 border-t border-zinc-200 px-3 py-2">
-                <Label htmlFor="rt-brush-size" className="text-[11px] text-zinc-500">
+              <div className="flex h-12 items-center gap-3 border-t border-zinc-200 px-4">
+                <Label htmlFor="rt-brush-size" className="text-[12px] font-medium text-zinc-500">
                   画笔粗细
                 </Label>
                 <input
@@ -691,60 +705,72 @@ export function RealtimeCanvasDialog({
                   step={1}
                   value={brushSize}
                   onChange={(event) => setBrushSize(Number(event.target.value))}
-                  className="h-2 w-32 accent-zinc-800"
+                  className="h-2 w-40 accent-zinc-800"
                 />
-                <span className="text-[11px] text-zinc-500">{brushSize}px</span>
+                <span className="text-[12px] text-zinc-500">{brushSize}px</span>
               </div>
             </div>
 
-            <div className="flex min-h-0 flex-col rounded-xl border border-zinc-200 bg-white/85">
-              <div className="flex items-center justify-between border-b border-zinc-200 px-3 py-2">
-                <span className="text-[12px] font-medium text-zinc-700">实时预览</span>
-                <Button type="button" variant="outline" size="sm" onClick={() => scheduleFlush(true)}>
-                  <Sparkles className="mr-1 h-3.5 w-3.5" />
+            <div className="flex min-h-0 flex-col overflow-hidden rounded-2xl border border-zinc-200 bg-white/95 shadow-sm">
+              <div className="flex h-12 items-center justify-between border-b border-zinc-200 px-4">
+                <span className="text-[15px] font-medium text-zinc-800">实时预览</span>
+                <Button
+                  type="button"
+                  variant="outline"
+                  size="sm"
+                  className="h-8 rounded-lg border-zinc-300 bg-white px-3 text-[12px]"
+                  onClick={() => scheduleFlush(true)}
+                >
+                  <Sparkles className="mr-1.5 h-3.5 w-3.5" />
                   刷新
                 </Button>
               </div>
-              <div className="relative min-h-0 flex-1 overflow-hidden rounded-b-xl bg-[#d2d3d6]">
-                {previewUrl ? (
-                  <img src={previewUrl} alt="实时预览" className="h-full w-full object-contain" />
-                ) : (
-                  <div className="flex h-full items-center justify-center text-[12px] text-zinc-500">
-                    {status === "connecting" ? (
-                      <span className="inline-flex items-center">
-                        <Loader2 className="mr-1.5 h-3.5 w-3.5 animate-spin" />
-                        正在等待首帧...
-                      </span>
-                    ) : (
-                      <span>开始绘制后将显示实时预览</span>
-                    )}
-                  </div>
-                )}
+              <div className="relative min-h-0 flex-1 overflow-hidden bg-[#d0d1d4] p-3">
+                <div className="h-full w-full overflow-hidden rounded-xl border border-zinc-300/80 bg-[#d0d1d4]">
+                  {previewUrl ? (
+                    <img src={previewUrl} alt="实时预览" className="h-full w-full object-contain" />
+                  ) : (
+                    <div className="flex h-full items-center justify-center text-[13px] text-zinc-500">
+                      {status === "connecting" ? (
+                        <span className="inline-flex items-center rounded-full bg-white/70 px-3 py-1.5">
+                          <Loader2 className="mr-2 h-3.5 w-3.5 animate-spin" />
+                          正在等待首帧...
+                        </span>
+                      ) : (
+                        <span>开始绘制后将显示实时预览</span>
+                      )}
+                    </div>
+                  )}
+                </div>
               </div>
             </div>
           </div>
 
-          <div className="border-t border-zinc-200 bg-white/90 px-4 py-3">
+          <div className="mt-4 rounded-2xl border border-zinc-200 bg-white/95 p-3 shadow-sm">
             <div className="flex items-center gap-2">
               <Input
                 value={prompt}
                 onChange={(event) => setPrompt(event.target.value)}
                 onBlur={() => scheduleFlush(true)}
                 placeholder="输入提示词，例如：将草图渲染为高端工业设计风格..."
-                className="h-10 flex-1 rounded-xl border-zinc-300 bg-white"
+                className="h-11 flex-1 rounded-xl border-zinc-300 bg-white text-[15px]"
               />
               <Button
                 type="button"
-                className="h-10 rounded-xl"
+                className="h-11 rounded-xl px-5"
                 disabled={!previewUrl || isApplying}
                 onClick={uploadPreviewToCanvas}
               >
-                {isApplying ? <Loader2 className="mr-1.5 h-4 w-4 animate-spin" /> : <Send className="mr-1.5 h-4 w-4" />}
+                {isApplying ? (
+                  <Loader2 className="mr-1.5 h-4 w-4 animate-spin" />
+                ) : (
+                  <Send className="mr-1.5 h-4 w-4" />
+                )}
                 发送到画布
               </Button>
             </div>
-            <div className="mt-2 text-[11px] text-zinc-500">
-              提示：绘制过程会自动触发实时渲染。当前发送节流 {adaptiveThrottleMs}ms。
+            <div className="mt-2 text-[12px] text-zinc-500">
+              绘制会自动触发实时渲染，当前节流间隔 {adaptiveThrottleMs}ms。
             </div>
           </div>
         </div>