diff --git a/components/CopyButton.tsx b/components/CopyButton.tsx
index e03791d..7cc6bd9 100644
--- a/components/CopyButton.tsx
+++ b/components/CopyButton.tsx
@@ -73,15 +73,15 @@ export const CopyButton: React.FC<CopyButtonProps> = ({
   const iconSize = size === 'small' ? 14 : size === 'medium' ? 16 : 18;
 
   const colorClasses: Record<string, string> = {
-    primary: 'text-blue-600 hover:bg-blue-50',
-    secondary: 'text-gray-600 hover:bg-gray-50',
-    success: 'text-green-600 hover:bg-green-50',
-    error: 'text-red-600 hover:bg-red-50',
-    info: 'text-blue-600 hover:bg-blue-50',
+    primary: 'text-primary hover:bg-primary/10',
+    secondary: 'text-foreground hover:bg-muted',
+    success: 'text-green-600 hover:bg-green-500/10',
+    error: 'text-red-600 hover:bg-red-500/10',
+    info: 'text-primary hover:bg-primary/10',
     warning: 'text-amber-600 hover:bg-amber-50',
   };
 
-  const colorClass = colorClasses[color] || `text-[${color}] hover:bg-gray-50`;
+  const colorClass = colorClasses[color] || `text-[${color}] hover:bg-muted`;
 
   return (
     <button
@@ -91,7 +91,7 @@ export const CopyButton: React.FC<CopyButtonProps> = ({
       style={style}
       className={`${sizeClasses[size]} rounded-md flex items-center justify-center transition-all ${
         copied ? 'text-green-600 bg-green-50' : colorClass
-      } bg-white shadow-sm hover:shadow-md`}
+      } bg-background shadow-sm hover:shadow-md`}
     >
       {copied ? (
         <Check style={{ width: iconSize, height: iconSize }} />
diff --git a/components/DecodeResultPaper.tsx b/components/DecodeResultPaper.tsx
index 1673f18..617ffb5 100644
--- a/components/DecodeResultPaper.tsx
+++ b/components/DecodeResultPaper.tsx
@@ -41,33 +41,33 @@ export default function DecodeResultPaper({
   const { t } = useTranslation('base64Converter');
 
   return (
-    <div className="p-4 rounded-xl bg-blue-50 border border-blue-200">
+    <div className="p-4 rounded-xl bg-primary/10 border border-primary/30">
       {/* 标题 */}
-      <span className="block mb-2 text-xs font-bold text-gray-500">{title}</span>
+      <span className="block mb-2 text-xs font-bold text-muted-foreground">{title}</span>
 
       {/* 可选预览内容（ImageMode 的图片） */}
       {children}
 
       {/* 文件信息 */}
       <div className="flex gap-4 mb-3">
-        <span className="text-xs text-gray-400">
+        <span className="text-xs text-muted-foreground">
           {t('inferredMimeType')}: {mimeType}
         </span>
-        <span className="text-xs text-gray-400">
+        <span className="text-xs text-muted-foreground">
           {t('decodedSize')}: {formatFileSize(blobSize)}
         </span>
       </div>
 
       {/* 文件名输入 */}
       <div className="mb-3">
-        <label className="block text-xs font-medium text-gray-500 mb-1">
+        <label className="block text-xs font-medium text-muted-foreground mb-1">
           {t('decodedFileName')}
         </label>
         <input
           type="text"
           value={fileName}
           onChange={(e) => onFileNameChange(e.target.value)}
-          className="w-full px-3 py-2 text-sm border border-gray-200 rounded-lg focus:outline-none focus:ring-2 focus:ring-blue-500"
+          className="w-full px-3 py-2 text-sm border border-border rounded-lg focus:outline-none focus:ring-2 focus:ring-primary"
         />
       </div>
 
diff --git a/components/ErrorBoundary.tsx b/components/ErrorBoundary.tsx
index 8966697..259dc8d 100644
--- a/components/ErrorBoundary.tsx
+++ b/components/ErrorBoundary.tsx
@@ -45,11 +45,11 @@ export class ErrorBoundary extends Component<Props, State> {
           <div className="p-6 text-center rounded-xl border border-red-200 bg-red-50">
             <AlertCircle className="h-16 w-16 text-red-500 mx-auto mb-4" />
             <h2 className="text-xl font-extrabold text-red-600 mb-2">糟糕，出了点问题</h2>
-            <p className="text-sm text-gray-500 mb-6">
+            <p className="text-sm text-muted-foreground mb-6">
               应用遇到了一些意外错误。您可以尝试刷新页面或重置应用。
             </p>
             {this.state.error && (
-              <div className="mb-6 p-4 bg-gray-50 rounded-lg text-left max-h-[200px] overflow-auto">
+              <div className="mb-6 p-4 bg-muted rounded-lg text-left max-h-[200px] overflow-auto">
                 <pre className="font-mono text-xs whitespace-pre-wrap break-all text-red-700">
                   {this.state.error.toString()}
                 </pre>
diff --git a/components/GlobalSnackbar.tsx b/components/GlobalSnackbar.tsx
index 37b28b9..f663106 100644
--- a/components/GlobalSnackbar.tsx
+++ b/components/GlobalSnackbar.tsx
@@ -137,7 +137,7 @@ const severityConfig: Record<
   { icon: React.ElementType; bgClass: string; textClass: string }
 > = {
   success: { icon: CheckCircle, bgClass: 'bg-green-500', textClass: 'text-white' },
-  info: { icon: Info, bgClass: 'bg-blue-500', textClass: 'text-white' },
+  info: { icon: Info, bgClass: 'bg-primary/100', textClass: 'text-white' },
   warning: { icon: AlertTriangle, bgClass: 'bg-amber-500', textClass: 'text-white' },
   error: { icon: XCircle, bgClass: 'bg-red-500', textClass: 'text-white' },
 };
diff --git a/components/ImageUploader.tsx b/components/ImageUploader.tsx
index 1faad0d..6aba860 100644
--- a/components/ImageUploader.tsx
+++ b/components/ImageUploader.tsx
@@ -118,7 +118,7 @@ const ImageUploader = ({
           ? 'border-green-600 bg-green-50'
           : selectedFile
             ? 'border-green-600 bg-green-50/50'
-            : 'border-gray-300 bg-gray-50 hover:border-green-600 hover:bg-green-50/50'
+            : 'border-input bg-muted hover:border-green-600 hover:bg-green-500/10/50'
       }`}
       onDragOver={handleDragOver}
       onDragLeave={handleDragLeave}
@@ -153,14 +153,21 @@ const ImageUploader = ({
                 <X className="w-3 h-3" />
               </button>
             </div>
-            <span className="block text-sm text-gray-500 mt-2">{selectedFile.name}</span>
-            <span className="block text-xs text-gray-400">{t('qrCode:clickToChange')}</span>
+            <span className="block text-sm text-muted-foreground mt-2">{selectedFile.name}</span>
+            <span className="block text-xs text-muted-foreground">{t('qrCode:clickToChange')}</span>
           </div>
         ) : (
           <>
-            <Image data-testid="ImageIcon" className="w-12 h-12 text-gray-400 mx-auto mb-2" />
-            <span className="block text-sm text-gray-500 mb-1">{t('qrCode:clickToUpload')}</span>
-            <span className="block text-xs text-gray-400">{t('qrCode:supportFormats')}</span>
+            <Image
+              data-testid="ImageIcon"
+              className="w-12 h-12 text-muted-foreground mx-auto mb-2"
+            />
+            <span className="block text-sm text-muted-foreground mb-1">
+              {t('qrCode:clickToUpload')}
+            </span>
+            <span className="block text-xs text-muted-foreground">
+              {t('qrCode:supportFormats')}
+            </span>
           </>
         )}
       </label>
diff --git a/components/PageErrorBoundary.tsx b/components/PageErrorBoundary.tsx
index 143e88d..37c3fba 100644
--- a/components/PageErrorBoundary.tsx
+++ b/components/PageErrorBoundary.tsx
@@ -47,11 +47,11 @@ export class PageErrorBoundary extends Component<Props, State> {
           <div className="p-6 text-center rounded-xl border border-red-200 bg-red-50 max-w-md w-full">
             <AlertCircle className="h-12 w-12 text-red-500 mx-auto mb-3" />
             <h3 className="text-lg font-bold text-red-600 mb-2">该页面加载失败</h3>
-            <p className="text-sm text-gray-500 mb-4">
+            <p className="text-sm text-muted-foreground mb-4">
               页面在加载或渲染时遇到错误，您可以重试或切换到其他工具。
             </p>
             {this.state.error && (
-              <div className="mb-4 p-3 bg-gray-50 rounded-lg text-left max-h-[160px] overflow-auto">
+              <div className="mb-4 p-3 bg-muted rounded-lg text-left max-h-[160px] overflow-auto">
                 <pre className="font-mono text-xs whitespace-pre-wrap break-all text-red-700">
                   {this.state.error.toString()}
                 </pre>
diff --git a/components/PageHeader.tsx b/components/PageHeader.tsx
index 7a14865..61377ab 100644
--- a/components/PageHeader.tsx
+++ b/components/PageHeader.tsx
@@ -92,7 +92,7 @@ export default function PageHeader({
         </div>
         {/* 副标题 */}
         {subtitle && (
-          <span className="text-xs font-semibold text-gray-500" style={subtitleSx}>
+          <span className="text-xs font-semibold text-muted-foreground" style={subtitleSx}>
             {subtitle}
           </span>
         )}
diff --git a/components/PageSkeleton.tsx b/components/PageSkeleton.tsx
index 65c2239..55565e4 100644
--- a/components/PageSkeleton.tsx
+++ b/components/PageSkeleton.tsx
@@ -14,7 +14,7 @@ interface PageSkeletonProps {
  */
 function DashboardCardSkeleton() {
   return (
-    <div className="rounded-xl border border-gray-200 p-5 h-[100px]">
+    <div className="rounded-xl border border-border p-5 h-[100px]">
       <div className="flex justify-between items-start">
         <div className="flex gap-3 items-center">
           <div className="w-10 h-10 rounded-lg bg-gray-200 animate-pulse" />
diff --git a/components/QrCodePreview.tsx b/components/QrCodePreview.tsx
index 5828dec..13e5d8f 100644
--- a/components/QrCodePreview.tsx
+++ b/components/QrCodePreview.tsx
@@ -15,21 +15,23 @@ const QrCodePreview = ({ qrCodeDataUrl, onDownload, onCopy }: QrCodePreviewProps
 
   if (!qrCodeDataUrl) {
     return (
-      <div className="flex flex-col justify-center items-center min-h-[200px] border-2 border-dashed border-gray-300 rounded-xl p-4 bg-gray-50">
-        <span className="text-sm text-gray-500 text-center">{t('qrCode:qrCodeWillShow')}</span>
+      <div className="flex flex-col justify-center items-center min-h-[200px] border-2 border-dashed border-input rounded-xl p-4 bg-muted">
+        <span className="text-sm text-muted-foreground text-center">
+          {t('qrCode:qrCodeWillShow')}
+        </span>
       </div>
     );
   }
 
   return (
-    <div className="flex flex-col justify-center items-center min-h-[200px] border-2 border-dashed border-gray-300 rounded-xl p-4 bg-gray-50">
+    <div className="flex flex-col justify-center items-center min-h-[200px] border-2 border-dashed border-input rounded-xl p-4 bg-muted">
       <div className="flex flex-col items-center w-full">
         <img src={qrCodeDataUrl} alt="QR Code" className="w-[250px] h-[250px] block" />
         <div className="flex gap-2 mt-4">
           <button
             type="button"
             onClick={onDownload}
-            className="flex items-center gap-2 px-4 py-2 text-sm font-medium text-green-700 bg-white border border-green-600 rounded-lg hover:bg-green-50 transition-colors"
+            className="flex items-center gap-2 px-4 py-2 text-sm font-medium text-green-600 bg-background border border-green-600 rounded-lg hover:bg-green-500/10 transition-colors"
           >
             <Download className="w-4 h-4" />
             {t('qrCode:downloadButton')}
diff --git a/components/SwitchButtonGroup.tsx b/components/SwitchButtonGroup.tsx
index 0ff653c..1fe47d0 100644
--- a/components/SwitchButtonGroup.tsx
+++ b/components/SwitchButtonGroup.tsx
@@ -28,7 +28,7 @@ export default function SwitchButtonGroup<T extends string | number = string>({
 
   return (
     <div
-      className="w-full mb-4 rounded-xl border border-gray-200 bg-gray-50 p-1.5 flex gap-1"
+      className="w-full mb-4 rounded-xl border border-border bg-muted p-1.5 flex gap-1"
       style={sx}
     >
       {options.map((option) => (
@@ -40,8 +40,8 @@ export default function SwitchButtonGroup<T extends string | number = string>({
             sizeClasses[size]
           } ${
             value === option.value
-              ? 'bg-white text-blue-600 shadow-sm'
-              : 'text-gray-500 hover:text-gray-700 hover:bg-white/50'
+              ? 'bg-background text-primary shadow-sm'
+              : 'text-muted-foreground hover:text-foreground hover:bg-background/50'
           }`}
           style={buttonSx}
         >
diff --git a/components/TextInputArea.tsx b/components/TextInputArea.tsx
index ec5973f..a7d78c7 100644
--- a/components/TextInputArea.tsx
+++ b/components/TextInputArea.tsx
@@ -152,9 +152,9 @@ function ActionButton({
     typeof action.disabled === 'function' ? action.disabled(value) : action.disabled || !value;
 
   const typeClasses: Record<string, string> = {
-    primary: 'bg-blue-600 text-white hover:bg-blue-700',
-    danger: 'text-red-600 hover:bg-red-50',
-    default: 'text-gray-500 hover:bg-gray-50',
+    primary: 'bg-primary text-white hover:bg-primary/90',
+    danger: 'text-red-600 hover:bg-red-500/10',
+    default: 'text-muted-foreground hover:bg-muted',
   };
 
   const sizeClasses = {
@@ -333,7 +333,7 @@ const TextInputArea = forwardRef<HTMLTextAreaElement, TextInputAreaProps>((props
       {hasTopBar && (
         <div className="flex items-center justify-between mb-2 px-1">
           <div className="flex items-center gap-3">
-            {title && <span className="text-sm font-semibold text-gray-500">{title}</span>}
+            {title && <span className="text-sm font-semibold text-muted-foreground">{title}</span>}
             {topExtra}
           </div>
 
@@ -349,7 +349,7 @@ const TextInputArea = forwardRef<HTMLTextAreaElement, TextInputAreaProps>((props
               />
             ))}
             {showCount && (
-              <span className="text-xs text-gray-400 tabular-nums ml-1">
+              <span className="text-xs text-muted-foreground tabular-nums ml-1">
                 {value.length}
                 {maxLength ? ` / ${maxLength}` : ''}
               </span>
@@ -374,10 +374,10 @@ const TextInputArea = forwardRef<HTMLTextAreaElement, TextInputAreaProps>((props
             maxHeight: autoResize ? `${maxRows * 1.5}rem` : undefined,
           }}
           className={`w-full rounded-lg border ${
-            displayError ? 'border-red-300' : 'border-gray-200'
-          } bg-white px-3 py-3 font-mono text-sm leading-relaxed transition-all resize-y ${
+            displayError ? 'border-red-300' : 'border-border'
+          } bg-background px-3 py-3 font-mono text-sm leading-relaxed transition-all resize-y ${
             showClear || allowCopy || bottomActions.length > 0 ? 'pb-10' : ''
-          } focus:outline-none focus:ring-2 focus:ring-blue-500 focus:bg-white hover:bg-gray-50 ${
+          } focus:outline-none focus:ring-2 focus:ring-primary focus:bg-background hover:bg-muted ${
             displayError ? 'focus:ring-red-500' : ''
           }`}
         />
@@ -403,7 +403,7 @@ const TextInputArea = forwardRef<HTMLTextAreaElement, TextInputAreaProps>((props
                 type="button"
                 onClick={handleCopy}
                 title={t('textInputArea.copyContent')}
-                className="p-1 rounded-md text-gray-400 hover:text-blue-600 hover:bg-blue-50 transition-colors"
+                className="p-1 rounded-md text-muted-foreground hover:text-primary hover:bg-primary/10 transition-colors"
               >
                 <Copy className="h-4 w-4" />
               </button>
@@ -413,7 +413,7 @@ const TextInputArea = forwardRef<HTMLTextAreaElement, TextInputAreaProps>((props
                 type="button"
                 onClick={handleClear}
                 title={t('textInputArea.clear')}
-                className="p-1 rounded-md text-gray-400 hover:text-red-600 hover:bg-red-50 transition-colors"
+                className="p-1 rounded-md text-muted-foreground hover:text-red-600 hover:bg-red-500/10 transition-colors"
               >
                 <X className="h-4 w-4" />
               </button>
diff --git a/components/TopBar.tsx b/components/TopBar.tsx
index 3a502c7..e171182 100644
--- a/components/TopBar.tsx
+++ b/components/TopBar.tsx
@@ -156,27 +156,27 @@ export default function TopBar({ onOpenOptions }: { onOpenOptions: () => void })
   const isDashboard = currentPage === 'dashboard';
 
   return (
-    <div className="flex justify-between items-center px-3 sm:px-4 py-3 border-b border-gray-200 bg-white relative z-[1100]">
+    <div className="flex justify-between items-center px-3 sm:px-4 py-3 border-b border-border bg-background relative z-[1100]">
       <div className="w-8 sm:w-10">
         {!isDashboard && (
           <button
             type="button"
             onClick={goBack}
             aria-label={t('common:buttons.back')}
-            className="p-1.5 rounded-md bg-gray-50 hover:bg-gray-100 transition-colors"
+            className="p-1.5 rounded-md bg-muted hover:bg-accent transition-colors"
           >
             <ArrowLeft className="h-3.5 w-3.5" />
           </button>
         )}
       </div>
 
-      <span className="hidden md:block text-xs font-extrabold tracking-wider uppercase text-gray-500 ml-2">
+      <span className="hidden md:block text-xs font-extrabold tracking-wider uppercase text-muted-foreground ml-2">
         {t('common:appName')}
       </span>
 
       <div className="flex-1 mx-2 sm:mx-4 relative max-w-[400px]">
         <div className="relative">
-          <div className="absolute left-3 top-1/2 -translate-y-1/2 text-gray-400">
+          <div className="absolute left-3 top-1/2 -translate-y-1/2 text-muted-foreground">
             <Search className="h-4 w-4" />
           </div>
           <input
@@ -188,7 +188,7 @@ export default function TopBar({ onOpenOptions }: { onOpenOptions: () => void })
             onFocus={() => setShowResults(true)}
             onKeyDown={handleKeyDown}
             aria-label={t('common:buttons.search')}
-            className="w-full pl-9 pr-8 py-1.5 text-sm rounded-lg border border-transparent bg-gray-50 focus:bg-white focus:border-blue-500 focus:ring-2 focus:ring-blue-500/20 transition-all"
+            className="w-full pl-9 pr-8 py-1.5 text-sm rounded-lg border border-transparent bg-muted focus:bg-background focus:border-primary focus:ring-2 focus:ring-primary/20 transition-all"
           />
           {searchQuery && (
             <button
@@ -198,7 +198,7 @@ export default function TopBar({ onOpenOptions }: { onOpenOptions: () => void })
                 setSelectedIndex(-1);
               }}
               aria-label={t('common:buttons.clearSearch')}
-              className="absolute right-2 top-1/2 -translate-y-1/2 p-0.5 rounded-md text-gray-400 hover:text-gray-600"
+              className="absolute right-2 top-1/2 -translate-y-1/2 p-0.5 rounded-md text-muted-foreground hover:text-foreground"
             >
               <X className="h-3.5 w-3.5" />
             </button>
@@ -206,7 +206,7 @@ export default function TopBar({ onOpenOptions }: { onOpenOptions: () => void })
         </div>
 
         {showResults && (searchQuery.trim() || displayedHistory.length > 0) && (
-          <div className="absolute top-full left-0 right-0 mt-2 bg-white rounded-lg shadow-lg border border-gray-200 max-h-[300px] overflow-auto z-[1200]">
+          <div className="absolute top-full left-0 right-0 mt-2 bg-popover rounded-lg shadow-lg border border-border max-h-[300px] overflow-auto z-[1200]">
             <ul role="listbox" className="py-1">
               {searchQuery.trim() ? (
                 searchResults.length > 0 ? (
@@ -217,17 +217,17 @@ export default function TopBar({ onOpenOptions }: { onOpenOptions: () => void })
                       aria-selected={selectedIndex === index}
                       onClick={() => handleSelectFeature(feature)}
                       className={`flex items-center gap-3 px-3 py-2 cursor-pointer transition-colors ${
-                        selectedIndex === index ? 'bg-blue-50' : 'hover:bg-gray-50'
+                        selectedIndex === index ? 'bg-primary/10' : 'hover:bg-muted'
                       }`}
                     >
-                      <div className="w-8 h-8 flex items-center justify-center text-gray-500">
+                      <div className="w-8 h-8 flex items-center justify-center text-muted-foreground">
                         {feature.icon && <feature.icon className="h-5 w-5" />}
                       </div>
                       <div className="flex-1 min-w-0">
-                        <p className="text-sm font-semibold text-gray-900 truncate">
+                        <p className="text-sm font-semibold text-foreground truncate">
                           {t(feature.labelKey)}
                         </p>
-                        <p className="text-xs text-gray-500 truncate">
+                        <p className="text-xs text-muted-foreground truncate">
                           {t(feature.descriptionKey)}
                         </p>
                       </div>
@@ -235,13 +235,13 @@ export default function TopBar({ onOpenOptions }: { onOpenOptions: () => void })
                   ))
                 ) : (
                   <li className="px-4 py-6 text-center">
-                    <p className="text-sm text-gray-500">{t('common:buttons.noResults')}</p>
+                    <p className="text-sm text-muted-foreground">{t('common:buttons.noResults')}</p>
                   </li>
                 )
               ) : (
                 <>
                   <li className="px-4 py-2">
-                    <span className="text-xs font-bold text-gray-400">
+                    <span className="text-xs font-bold text-muted-foreground">
                       {t('common:buttons.recentSearch')}
                     </span>
                   </li>
@@ -255,13 +255,13 @@ export default function TopBar({ onOpenOptions }: { onOpenOptions: () => void })
                         setSelectedIndex(-1);
                       }}
                       className={`flex items-center gap-3 px-3 py-2 cursor-pointer transition-colors ${
-                        selectedIndex === index ? 'bg-blue-50' : 'hover:bg-gray-50'
+                        selectedIndex === index ? 'bg-primary/10' : 'hover:bg-muted'
                       }`}
                     >
-                      <div className="w-8 h-8 flex items-center justify-center text-gray-400">
+                      <div className="w-8 h-8 flex items-center justify-center text-muted-foreground">
                         <History className="h-4 w-4" />
                       </div>
-                      <span className="text-sm text-gray-700">{item}</span>
+                      <span className="text-sm text-foreground">{item}</span>
                     </li>
                   ))}
                 </>
@@ -277,7 +277,7 @@ export default function TopBar({ onOpenOptions }: { onOpenOptions: () => void })
           onClick={toggleLanguage}
           aria-label={t('common:buttons.toggleLanguage')}
           title={t('common:buttons.toggleLanguage')}
-          className="p-1.5 rounded-md hover:bg-gray-100 transition-colors"
+          className="p-1.5 rounded-md hover:bg-accent transition-colors"
         >
           <Globe className="h-4 w-4" />
         </button>
@@ -286,7 +286,7 @@ export default function TopBar({ onOpenOptions }: { onOpenOptions: () => void })
           onClick={cycleThemeMode}
           aria-label={t('common:buttons.toggleTheme')}
           title={t(`common:buttons.themeMode.${mode}`)}
-          className="p-1.5 rounded-md hover:bg-gray-100 transition-colors"
+          className="p-1.5 rounded-md hover:bg-accent transition-colors"
         >
           <ThemeIcon className="h-4 w-4" />
         </button>
@@ -295,7 +295,7 @@ export default function TopBar({ onOpenOptions }: { onOpenOptions: () => void })
           onClick={handleOpenInTab}
           aria-label={t('common:buttons.openInTab')}
           title={t('common:buttons.openInTab')}
-          className="p-1.5 rounded-md hover:bg-gray-100 transition-colors"
+          className="p-1.5 rounded-md hover:bg-accent transition-colors"
         >
           <ExternalLink className="h-4 w-4" />
         </button>
@@ -304,7 +304,7 @@ export default function TopBar({ onOpenOptions }: { onOpenOptions: () => void })
           onClick={onOpenOptions}
           aria-label={t('common:buttons.settings')}
           title={t('common:buttons.settings')}
-          className="p-1.5 rounded-md hover:bg-gray-100 transition-colors"
+          className="p-1.5 rounded-md hover:bg-accent transition-colors"
         >
           <Settings className="h-4 w-4" />
         </button>
diff --git a/components/__tests__/PageHeader.test.tsx b/components/__tests__/PageHeader.test.tsx
index 7f7b8ad..55fab2b 100644
--- a/components/__tests__/PageHeader.test.tsx
+++ b/components/__tests__/PageHeader.test.tsx
@@ -84,7 +84,7 @@ describe('PageHeader 组件系统', () => {
 
     it('无副标题时不渲染副标题区域', () => {
       const { container } = render(<PageHeader icon={defaultProps.icon} title="仅标题" />);
-      const subtitles = container.querySelectorAll('.text-gray-500');
+      const subtitles = container.querySelectorAll('.text-muted-foreground');
       expect(subtitles.length).toBe(0);
     });
   });
diff --git a/components/__tests__/SwitchButtonGroup.test.tsx b/components/__tests__/SwitchButtonGroup.test.tsx
index 0e685d6..0fde098 100644
--- a/components/__tests__/SwitchButtonGroup.test.tsx
+++ b/components/__tests__/SwitchButtonGroup.test.tsx
@@ -21,10 +21,10 @@ describe('SwitchButtonGroup 组件', () => {
     const buttonA = screen.getByRole('button', { name: /选项A/i });
     const buttonB = screen.getByRole('button', { name: /选项B/i });
 
-    // 选中的按钮有 bg-white text-blue-600 shadow-sm 类
-    expect(buttonA).toHaveClass('bg-white', 'text-blue-600', 'shadow-sm');
-    // 未选中的按钮有 text-gray-500 类
-    expect(buttonB).toHaveClass('text-gray-500');
+    // 选中的按钮有 bg-background text-primary shadow-sm 类
+    expect(buttonA).toHaveClass('bg-background', 'text-primary', 'shadow-sm');
+    // 未选中的按钮有 text-muted-foreground 类
+    expect(buttonB).toHaveClass('text-muted-foreground');
   });
 
   it('点击未选中按钮时应触发 onChange 并传入选中值', () => {
@@ -122,8 +122,8 @@ describe('SwitchButtonGroup 组件', () => {
       const button2 = screen.getByRole('button', { name: /^2$/i });
       const button4 = screen.getByRole('button', { name: /^4$/i });
 
-      expect(button2).toHaveClass('text-gray-500');
-      expect(button4).toHaveClass('bg-white', 'text-blue-600', 'shadow-sm');
+      expect(button2).toHaveClass('text-muted-foreground');
+      expect(button4).toHaveClass('bg-background', 'text-primary', 'shadow-sm');
     });
 
     it('点击 number 选项时应传回 number 值', () => {
diff --git a/components/__tests__/TextInputArea.test.tsx b/components/__tests__/TextInputArea.test.tsx
index 2bd7816..10388a2 100644
--- a/components/__tests__/TextInputArea.test.tsx
+++ b/components/__tests__/TextInputArea.test.tsx
@@ -334,7 +334,7 @@ describe('TextInputArea 组件', () => {
       );
 
       const btn = screen.getByText('主要');
-      expect(btn).toHaveClass('bg-blue-600', 'text-white');
+      expect(btn).toHaveClass('bg-primary', 'text-white');
     });
   });
 
@@ -346,7 +346,7 @@ describe('TextInputArea 组件', () => {
 
     it('不设置 title 时不渲染标题', () => {
       const { container } = render(<TextInputArea value="" onChange={() => {}} />);
-      expect(container.querySelector('.text-gray-500')).not.toBeInTheDocument();
+      expect(container.querySelector('.text-muted-foreground')).not.toBeInTheDocument();
     });
   });
 
diff --git a/entrypoints/options/App.tsx b/entrypoints/options/App.tsx
index 9f9d8ba..76be67a 100644
--- a/entrypoints/options/App.tsx
+++ b/entrypoints/options/App.tsx
@@ -91,14 +91,14 @@ function SortableFeatureRow({
     <div
       ref={setNodeRef}
       style={style}
-      className={`flex items-center justify-between p-4 sm:p-5 transition-all duration-200 hover:bg-gray-50 ${
-        isLast ? '' : 'border-b border-gray-200'
+      className={`flex items-center justify-between p-4 sm:p-5 transition-all duration-200 hover:bg-muted ${
+        isLast ? '' : 'border-b border-border'
       }`}
     >
       <div className="flex items-center gap-3 sm:gap-4 flex-1 min-w-0">
         {/* 拖拽手柄 */}
         <div
-          className="drag-handle text-gray-300 cursor-grab touch-none transition-colors duration-200 hover:text-gray-500 active:cursor-grabbing"
+          className="drag-handle text-muted-foreground cursor-grab touch-none transition-colors duration-200 hover:text-foreground active:cursor-grabbing"
           {...attributes}
           {...listeners}
           aria-label={`拖拽以调整 ${t(feature.labelKey)} 的位置`}
@@ -119,12 +119,12 @@ function SortableFeatureRow({
 
         {/* 文本信息 */}
         <div className="min-w-0 flex-1">
-          <div className="font-bold text-[0.95rem] leading-tight text-gray-900">
+          <div className="font-bold text-[0.95rem] leading-tight text-foreground">
             {t(feature.labelKey)}
           </div>
           {feature.descriptionKey && (
             <div
-              className="text-xs text-gray-500 font-medium mt-0.5 overflow-hidden text-ellipsis whitespace-nowrap"
+              className="text-xs text-muted-foreground font-medium mt-0.5 overflow-hidden text-ellipsis whitespace-nowrap"
               title={t(feature.descriptionKey)}
             >
               {t(feature.descriptionKey)}
@@ -140,12 +140,12 @@ function SortableFeatureRow({
         aria-checked={isChecked}
         disabled={isDisabled}
         onClick={() => onToggle(pageKey)}
-        className={`relative inline-flex h-6 w-11 items-center rounded-full transition-colors duration-200 focus:outline-none focus:ring-2 focus:ring-blue-500 focus:ring-offset-2 ${
-          isChecked ? 'bg-blue-600' : 'bg-gray-200'
+        className={`relative inline-flex h-6 w-11 items-center rounded-full transition-colors duration-200 focus:outline-none focus:ring-2 focus:ring-primary focus:ring-offset-2 ${
+          isChecked ? 'bg-primary' : 'bg-muted'
         } ${isDisabled ? 'opacity-50 cursor-not-allowed' : 'cursor-pointer'}`}
       >
         <span
-          className={`inline-block h-4 w-4 transform rounded-full bg-white transition-transform duration-200 ${
+          className={`inline-block h-4 w-4 transform rounded-full bg-background transition-transform duration-200 ${
             isChecked ? 'translate-x-6' : 'translate-x-1'
           }`}
         />
@@ -306,16 +306,16 @@ export default function App() {
   if (!isLoaded) {
     return (
       <div className="flex justify-center items-center min-h-screen">
-        <div className="w-6 h-6 border-2 border-blue-600 border-t-transparent rounded-full animate-spin" />
+        <div className="w-6 h-6 border-2 border-primary border-t-transparent rounded-full animate-spin" />
       </div>
     );
   }
 
   return (
-    <div className="app min-h-screen bg-gray-50 flex flex-col">
+    <div className="app min-h-screen bg-background flex flex-col">
       <PageErrorBoundary>
         {/* 顶部标题与导航栏 */}
-        <div className="w-full bg-white border-b border-gray-200 pt-8 sm:pt-12 pb-0 px-4 sm:px-8">
+        <div className="w-full bg-background border-b border-border pt-8 sm:pt-12 pb-0 px-4 sm:px-8">
           <div className="max-w-3xl mx-auto">
             <PageHeader
               icon={<Settings size={20} />}
@@ -333,8 +333,8 @@ export default function App() {
                     onClick={(e) => handleWindowTypeChange(e, type)}
                     className={`px-4 sm:px-6 py-2 text-[0.9rem] font-bold transition-colors duration-200 ${
                       windowType === type
-                        ? 'text-blue-600 border-b-2 border-blue-600'
-                        : 'text-gray-500 hover:text-gray-700'
+                        ? 'text-primary border-b-2 border-primary'
+                        : 'text-muted-foreground hover:text-foreground'
                     }`}
                   >
                     {type === 'popup' ? 'Popup 窗口' : type === 'sidepanel' ? '侧边栏' : '标签页'}
@@ -343,7 +343,7 @@ export default function App() {
               </div>
               <button
                 onClick={handleRestoreDefaults}
-                className="mb-1 ml-2 p-1.5 text-gray-500 hover:text-blue-600 hover:bg-blue-50 rounded-lg transition-colors duration-200"
+                className="mb-1 ml-2 p-1.5 text-muted-foreground hover:text-primary hover:bg-primary/10 rounded-lg transition-colors duration-200"
                 title="恢复当前模式默认"
               >
                 <RefreshCw size={16} />
@@ -355,7 +355,7 @@ export default function App() {
         {/* 主内容区域 */}
         <div className="flex-1 p-4 sm:p-8">
           <div className="max-w-3xl mx-auto">
-            <div className="rounded-2xl border border-gray-200 overflow-hidden bg-white shadow-sm">
+            <div className="rounded-2xl border border-border overflow-hidden bg-card shadow-sm">
               <DndContext
                 sensors={sensors}
                 collisionDetection={closestCenter}
diff --git a/entrypoints/popup/index.html b/entrypoints/popup/index.html
index 8f522bb..f2ec7be 100644
--- a/entrypoints/popup/index.html
+++ b/entrypoints/popup/index.html
@@ -13,7 +13,7 @@
         margin: 0;
         padding: 0;
         overflow: hidden;
-        background-color: #f5f5f5; /* Light mode default */
+        background-color: hsl(var(--background));
       }
       /* Ensure full size for the root container */
       #root {
diff --git a/package-lock.json b/package-lock.json
index d3ca753..88b2760 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -2182,9 +2182,6 @@
       "cpu": [
         "arm64"
       ],
-      "libc": [
-        "glibc"
-      ],
       "license": "MIT",
       "optional": true,
       "os": [
@@ -2201,9 +2198,6 @@
       "cpu": [
         "arm64"
       ],
-      "libc": [
-        "musl"
-      ],
       "license": "MIT",
       "optional": true,
       "os": [
@@ -2220,9 +2214,6 @@
       "cpu": [
         "ppc64"
       ],
-      "libc": [
-        "glibc"
-      ],
       "license": "MIT",
       "optional": true,
       "os": [
@@ -2239,9 +2230,6 @@
       "cpu": [
         "s390x"
       ],
-      "libc": [
-        "glibc"
-      ],
       "license": "MIT",
       "optional": true,
       "os": [
@@ -2258,9 +2246,6 @@
       "cpu": [
         "x64"
       ],
-      "libc": [
-        "glibc"
-      ],
       "license": "MIT",
       "optional": true,
       "os": [
@@ -2277,9 +2262,6 @@
       "cpu": [
         "x64"
       ],
-      "libc": [
-        "musl"
-      ],
       "license": "MIT",
       "optional": true,
       "os": [
@@ -7564,9 +7546,6 @@
       "cpu": [
         "arm64"
       ],
-      "libc": [
-        "glibc"
-      ],
       "license": "MPL-2.0",
       "optional": true,
       "os": [
@@ -7587,9 +7566,6 @@
       "cpu": [
         "arm64"
       ],
-      "libc": [
-        "musl"
-      ],
       "license": "MPL-2.0",
       "optional": true,
       "os": [
@@ -7610,9 +7586,6 @@
       "cpu": [
         "x64"
       ],
-      "libc": [
-        "glibc"
-      ],
       "license": "MPL-2.0",
       "optional": true,
       "os": [
@@ -7633,9 +7606,6 @@
       "cpu": [
         "x64"
       ],
-      "libc": [
-        "musl"
-      ],
       "license": "MPL-2.0",
       "optional": true,
       "os": [
diff --git a/pages/Base64Converter/FileMode.tsx b/pages/Base64Converter/FileMode.tsx
index 25b61b4..c0da7cc 100644
--- a/pages/Base64Converter/FileMode.tsx
+++ b/pages/Base64Converter/FileMode.tsx
@@ -179,10 +179,10 @@ export default function FileMode() {
             onClick={() => fileInputRef.current?.click()}
             className={`flex flex-col items-center justify-center min-h-[180px] border-2 border-dashed rounded-xl p-8 cursor-pointer transition-all duration-200 ${
               isDragging
-                ? 'border-blue-500 bg-blue-50'
+                ? 'border-primary bg-primary/10'
                 : info
-                  ? 'border-blue-500 bg-blue-50/50'
-                  : 'border-gray-300 bg-gray-50 hover:border-blue-500 hover:bg-blue-50/50'
+                  ? 'border-primary bg-primary/5'
+                  : 'border-input bg-muted hover:border-primary hover:bg-primary/5'
             }`}
           >
             <input
@@ -195,23 +195,23 @@ export default function FileMode() {
               }}
             />
             {isLoading ? (
-              <div className="w-10 h-10 border-4 border-blue-200 border-t-blue-600 rounded-full animate-spin" />
+              <div className="w-10 h-10 border-4 border-primary/30 border-t-blue-600 rounded-full animate-spin" />
             ) : info ? (
               <div className="flex flex-col items-center gap-1">
-                <Upload className="w-10 h-10 text-blue-600" />
+                <Upload className="w-10 h-10 text-primary" />
                 <span className="text-sm font-bold">{info.name}</span>
-                <span className="text-xs text-gray-500">
+                <span className="text-xs text-muted-foreground">
                   {formatFileSize(info.size)} · {info.type}
                 </span>
-                <span className="text-xs text-gray-400">{t('clickOrDropToReplace')}</span>
+                <span className="text-xs text-muted-foreground">{t('clickOrDropToReplace')}</span>
               </div>
             ) : (
               <div className="flex flex-col items-center gap-1">
-                <Upload className="w-10 h-10 text-gray-400" />
-                <span className="text-sm text-gray-500 font-semibold">
+                <Upload className="w-10 h-10 text-muted-foreground" />
+                <span className="text-sm text-muted-foreground font-semibold">
                   {t('clickOrDropToFile')}
                 </span>
-                <span className="text-xs text-gray-400">
+                <span className="text-xs text-muted-foreground">
                   {t('maxFileSize', { max: `${MAX_FILE_SIZE / 1024 / 1024} MB` })}
                 </span>
               </div>
@@ -228,9 +228,9 @@ export default function FileMode() {
           )}
 
           {result && (
-            <div className="p-4 rounded-xl bg-blue-50 border border-blue-200">
+            <div className="p-4 rounded-xl bg-primary/10 border border-primary/30">
               <div className="flex justify-between items-center mb-2">
-                <span className="text-xs font-bold text-gray-500">{t('base64Output')}</span>
+                <span className="text-xs font-bold text-muted-foreground">{t('base64Output')}</span>
                 <div className="flex gap-1">
                   <CopyButton text={result.rawBase64} tooltip={t('copyRaw')} />
                   <CopyButton text={result.output} tooltip={t('copyDataUri')} color="info" />
@@ -247,17 +247,17 @@ export default function FileMode() {
                 showCount
               />
               <div className="flex items-center gap-4 mt-2">
-                <span className="text-xs text-gray-400">
+                <span className="text-xs text-muted-foreground">
                   {t('originalSize')}: {formatFileSize(result.originalBytes)}
                 </span>
-                <span className="text-xs text-gray-400">
+                <span className="text-xs text-muted-foreground">
                   {t('encodedSize')}: {formatFileSize(result.outputBytes)}
                 </span>
                 <div className="flex-1" />
                 <button
                   type="button"
                   onClick={handleClear}
-                  className="flex items-center gap-1 px-2 py-1 text-xs text-gray-500 hover:bg-gray-100 rounded-md transition-colors"
+                  className="flex items-center gap-1 px-2 py-1 text-xs text-muted-foreground hover:bg-accent rounded-md transition-colors"
                 >
                   <Trash2 className="w-3 h-3" />
                   {t('clear')}
@@ -270,7 +270,7 @@ export default function FileMode() {
             <button
               type="button"
               onClick={handleClear}
-              className="flex items-center gap-1 px-3 py-2 text-sm text-gray-500 hover:bg-gray-100 rounded-lg transition-colors"
+              className="flex items-center gap-1 px-3 py-2 text-sm text-muted-foreground hover:bg-accent rounded-lg transition-colors"
             >
               <Trash2 className="w-4 h-4" />
               {t('clear')}
diff --git a/pages/Base64Converter/ImageMode.tsx b/pages/Base64Converter/ImageMode.tsx
index 0ae654d..87a3d05 100644
--- a/pages/Base64Converter/ImageMode.tsx
+++ b/pages/Base64Converter/ImageMode.tsx
@@ -185,10 +185,10 @@ export default function ImageMode() {
             onClick={() => imageInputRef.current?.click()}
             className={`flex flex-col items-center justify-center min-h-[180px] border-2 border-dashed rounded-xl p-8 cursor-pointer transition-all duration-200 ${
               isDragging
-                ? 'border-blue-500 bg-blue-50'
+                ? 'border-primary bg-primary/10'
                 : info
-                  ? 'border-blue-500 bg-blue-50/50'
-                  : 'border-gray-300 bg-gray-50 hover:border-blue-500 hover:bg-blue-50/50'
+                  ? 'border-primary bg-primary/5'
+                  : 'border-input bg-muted hover:border-primary hover:bg-primary/5'
             }`}
           >
             <input
@@ -202,7 +202,7 @@ export default function ImageMode() {
               }}
             />
             {isLoading ? (
-              <div className="w-10 h-10 border-4 border-blue-200 border-t-blue-600 rounded-full animate-spin" />
+              <div className="w-10 h-10 border-4 border-primary/30 border-t-blue-600 rounded-full animate-spin" />
             ) : info ? (
               <div className="flex flex-col items-center gap-1">
                 {result && (
@@ -213,18 +213,18 @@ export default function ImageMode() {
                   />
                 )}
                 <span className="text-sm font-bold">{info.name}</span>
-                <span className="text-xs text-gray-500">
+                <span className="text-xs text-muted-foreground">
                   {formatFileSize(info.size)} · {info.type}
                 </span>
-                <span className="text-xs text-gray-400">{t('clickOrDropToReplace')}</span>
+                <span className="text-xs text-muted-foreground">{t('clickOrDropToReplace')}</span>
               </div>
             ) : (
               <div className="flex flex-col items-center gap-1">
-                <Image className="w-10 h-10 text-gray-400" />
-                <span className="text-sm text-gray-500 font-semibold">
+                <Image className="w-10 h-10 text-muted-foreground" />
+                <span className="text-sm text-muted-foreground font-semibold">
                   {t('clickOrDropToImage')}
                 </span>
-                <span className="text-xs text-gray-400">{t('supportedFormats')}</span>
+                <span className="text-xs text-muted-foreground">{t('supportedFormats')}</span>
               </div>
             )}
           </div>
@@ -239,24 +239,24 @@ export default function ImageMode() {
           )}
 
           {result && (
-            <div className="p-4 rounded-xl bg-blue-50 border border-blue-200">
+            <div className="p-4 rounded-xl bg-primary/10 border border-primary/30">
               <div className="flex justify-between items-center mb-2">
-                <span className="text-xs font-bold text-gray-500">{t('base64Output')}</span>
+                <span className="text-xs font-bold text-muted-foreground">{t('base64Output')}</span>
                 <div className="flex gap-1">
                   <CopyButton text={result.rawBase64} tooltip={t('copyRaw')} />
                   <CopyButton text={result.output} tooltip={t('copyDataUri')} color="info" />
                 </div>
               </div>
-              <div className="font-mono text-xs break-all max-h-[200px] overflow-y-auto leading-relaxed text-blue-600 font-semibold">
+              <div className="font-mono text-xs break-all max-h-[200px] overflow-y-auto leading-relaxed text-primary font-semibold">
                 {result.output.length > 2000
                   ? `${result.output.substring(0, 2000)}...`
                   : result.output}
               </div>
               <div className="flex gap-4 mt-2">
-                <span className="text-xs text-gray-400">
+                <span className="text-xs text-muted-foreground">
                   {t('originalSize')}: {formatFileSize(result.originalBytes)}
                 </span>
-                <span className="text-xs text-gray-400">
+                <span className="text-xs text-muted-foreground">
                   {t('encodedSize')}: {formatFileSize(result.outputBytes)}
                 </span>
               </div>
@@ -267,7 +267,7 @@ export default function ImageMode() {
             <button
               type="button"
               onClick={handleClear}
-              className="flex items-center gap-1 px-3 py-2 text-sm text-gray-500 hover:bg-gray-100 rounded-lg transition-colors"
+              className="flex items-center gap-1 px-3 py-2 text-sm text-muted-foreground hover:bg-accent rounded-lg transition-colors"
             >
               <Trash2 className="w-4 h-4" />
               {t('clear')}
diff --git a/pages/Base64Converter/TextMode.tsx b/pages/Base64Converter/TextMode.tsx
index 95354eb..4b3db19 100644
--- a/pages/Base64Converter/TextMode.tsx
+++ b/pages/Base64Converter/TextMode.tsx
@@ -120,12 +120,12 @@ export default function TextMode({ onSwitchToImageMode }: TextModeProps = {}) {
       />
 
       {showImageHint && (
-        <div className="flex items-center justify-between p-3 rounded-lg bg-blue-50 border border-blue-200">
-          <span className="text-sm text-blue-700">{t('imageDataUriHint')}</span>
+        <div className="flex items-center justify-between p-3 rounded-lg bg-primary/10 border border-primary/30">
+          <span className="text-sm text-primary">{t('imageDataUriHint')}</span>
           <button
             type="button"
             onClick={onSwitchToImageMode}
-            className="px-3 py-1 text-sm font-medium text-blue-600 hover:bg-blue-100 rounded-md transition-colors"
+            className="px-3 py-1 text-sm font-medium text-primary hover:bg-blue-100 rounded-md transition-colors"
           >
             {t('switchToImageMode')}
           </button>
@@ -133,9 +133,9 @@ export default function TextMode({ onSwitchToImageMode }: TextModeProps = {}) {
       )}
 
       {output && (
-        <div className="p-4 rounded-xl bg-blue-50 border border-blue-200">
+        <div className="p-4 rounded-xl bg-primary/10 border border-primary/30">
           <div className="flex justify-between items-center mb-2">
-            <span className="text-xs font-bold text-gray-500">{outputLabel}</span>
+            <span className="text-xs font-bold text-muted-foreground">{outputLabel}</span>
             <CopyButton text={output} />
           </div>
           <TextInputArea
diff --git a/pages/Dashboard/ToolCard.tsx b/pages/Dashboard/ToolCard.tsx
index a8e0329..baad2e2 100644
--- a/pages/Dashboard/ToolCard.tsx
+++ b/pages/Dashboard/ToolCard.tsx
@@ -33,7 +33,7 @@ export default function ToolCard({
 
   return (
     <div
-      className="group relative rounded-2xl border border-gray-200 h-full box-border transition-all duration-300 ease-[cubic-bezier(0.4,0,0.2,1)] hover:-translate-y-1"
+      className="group relative rounded-2xl border border-border h-full box-border transition-all duration-300 ease-[cubic-bezier(0.4,0,0.2,1)] hover:-translate-y-1"
       style={{
         borderColor: undefined,
         ['--hover-color' as string]: colorCode,
@@ -65,18 +65,18 @@ export default function ToolCard({
               <IconComponent size={20} />
             </div>
             <div>
-              <span className="font-bold text-sm leading-tight text-gray-900 flex items-center gap-1">
+              <span className="font-bold text-sm leading-tight text-foreground flex items-center gap-1">
                 {title}
               </span>
               {description && (
-                <span className="block text-xs text-gray-500 font-medium mt-1 overflow-hidden text-ellipsis whitespace-nowrap max-w-[200px]">
+                <span className="block text-xs text-muted-foreground font-medium mt-1 overflow-hidden text-ellipsis whitespace-nowrap max-w-[200px]">
                   {description}
                 </span>
               )}
             </div>
           </div>
           <ChevronRight
-            className="w-3 h-3 text-gray-300 mt-1 transition-all duration-300 ease-in-out group-hover:translate-x-1"
+            className="w-3 h-3 text-muted-foreground mt-1 transition-all duration-300 ease-in-out group-hover:translate-x-1"
             style={{ color: undefined }}
             onMouseEnter={(e) => {
               e.currentTarget.style.color = colorCode;
@@ -88,9 +88,7 @@ export default function ToolCard({
         </div>
 
         {snapshot != null && (
-          <div className="mt-auto pt-4 border-t border-dashed border-gray-200 w-full">
-            {snapshot}
-          </div>
+          <div className="mt-auto pt-4 border-t border-dashed border-border w-full">{snapshot}</div>
         )}
       </button>
     </div>
diff --git a/pages/HtmlToMarkdown/index.tsx b/pages/HtmlToMarkdown/index.tsx
index 5656818..6070675 100644
--- a/pages/HtmlToMarkdown/index.tsx
+++ b/pages/HtmlToMarkdown/index.tsx
@@ -65,14 +65,14 @@ export default function HtmlToMarkdownPage() {
             <button
               onClick={handleDownload}
               disabled={!result.markdown}
-              className="inline-flex items-center gap-1.5 px-3 py-1.5 text-sm font-medium text-gray-700 bg-white border border-gray-300 rounded-lg hover:bg-gray-50 disabled:opacity-50 disabled:cursor-not-allowed transition-colors"
+              className="inline-flex items-center gap-1.5 px-3 py-1.5 text-sm font-medium text-foreground bg-background border border-input rounded-lg hover:bg-muted disabled:opacity-50 disabled:cursor-not-allowed transition-colors"
             >
               <Download size={14} />
               {t('download')}
             </button>
             <button
               onClick={handleClear}
-              className="inline-flex items-center gap-1.5 px-3 py-1.5 text-sm font-medium text-gray-700 bg-white border border-gray-300 rounded-lg hover:bg-gray-50 transition-colors"
+              className="inline-flex items-center gap-1.5 px-3 py-1.5 text-sm font-medium text-foreground bg-background border border-input rounded-lg hover:bg-muted transition-colors"
             >
               <Trash2 size={14} />
               {t('clear')}
@@ -95,10 +95,10 @@ export default function HtmlToMarkdownPage() {
         >
           {/* HTML 输入区 */}
           {showInput && (
-            <div className="border border-gray-200 rounded-xl overflow-hidden flex flex-col">
-              <div className="flex items-center justify-between px-4 py-2 bg-blue-50/50 border-b border-gray-200">
-                <span className="text-xs font-bold text-gray-500">{t('inputLabel')}</span>
-                <span className="text-xs text-gray-400">
+            <div className="border border-border rounded-xl overflow-hidden flex flex-col">
+              <div className="flex items-center justify-between px-4 py-2 bg-primary/5 border-b border-border">
+                <span className="text-xs font-bold text-muted-foreground">{t('inputLabel')}</span>
+                <span className="text-xs text-muted-foreground">
                   {t('charCount', { count: html.length })}
                 </span>
               </div>
@@ -113,15 +113,15 @@ export default function HtmlToMarkdownPage() {
 
           {/* Markdown 输出区 */}
           {showOutput && (
-            <div className="border border-gray-200 rounded-xl overflow-hidden flex flex-col">
-              <div className="flex items-center justify-between px-4 py-2 bg-blue-50/50 border-b border-gray-200">
-                <span className="text-xs font-bold text-gray-500">
+            <div className="border border-border rounded-xl overflow-hidden flex flex-col">
+              <div className="flex items-center justify-between px-4 py-2 bg-primary/5 border-b border-border">
+                <span className="text-xs font-bold text-muted-foreground">
                   {(previewMode as string) === 'markdown'
                     ? t('markdownOutputLabel')
                     : t('previewLabel')}
                 </span>
                 <div className="flex items-center gap-1">
-                  <span className="text-xs text-gray-400">
+                  <span className="text-xs text-muted-foreground">
                     {t('charCount', { count: result.markdownLength })}
                   </span>
                   <CopyButton text={result.markdown} size="small" />
@@ -132,11 +132,13 @@ export default function HtmlToMarkdownPage() {
                 <textarea
                   value={result.markdown}
                   readOnly
-                  className="flex-1 min-h-[400px] p-4 font-mono text-[0.85rem] leading-relaxed resize-none focus:outline-none bg-gray-50"
+                  className="flex-1 min-h-[400px] p-4 font-mono text-[0.85rem] leading-relaxed resize-none focus:outline-none bg-muted"
                 />
               ) : (
-                <div className="flex-1 p-4 min-h-[400px] overflow-auto bg-white font-mono text-[0.85rem] leading-relaxed whitespace-pre-wrap break-words">
-                  {result.markdown || <span className="text-gray-400">{t('emptyHint')}</span>}
+                <div className="flex-1 p-4 min-h-[400px] overflow-auto bg-background font-mono text-[0.85rem] leading-relaxed whitespace-pre-wrap break-words">
+                  {result.markdown || (
+                    <span className="text-muted-foreground">{t('emptyHint')}</span>
+                  )}
                 </div>
               )}
             </div>
diff --git a/pages/JsonTools/DiffNavigator.tsx b/pages/JsonTools/DiffNavigator.tsx
index 45ca5c6..a6970c5 100644
--- a/pages/JsonTools/DiffNavigator.tsx
+++ b/pages/JsonTools/DiffNavigator.tsx
@@ -14,14 +14,14 @@ export default function DiffNavigator({ total, currentIndex, onPrev, onNext }: D
 
   if (total === 0) {
     return (
-      <div className="flex items-center justify-center gap-3 p-2.5 rounded-lg bg-blue-50 border border-blue-200">
-        <span className="text-sm font-bold text-gray-500">{t('jsonDiff:noDiffs')}</span>
+      <div className="flex items-center justify-center gap-3 p-2.5 rounded-lg bg-primary/10 border border-primary/30">
+        <span className="text-sm font-bold text-muted-foreground">{t('jsonDiff:noDiffs')}</span>
       </div>
     );
   }
 
   return (
-    <div className="flex items-center justify-center gap-3 p-2.5 rounded-lg bg-blue-50 border border-blue-200">
+    <div className="flex items-center justify-center gap-3 p-2.5 rounded-lg bg-primary/10 border border-primary/30">
       <button
         type="button"
         aria-label={t('jsonDiff:previousDiff')}
diff --git a/pages/JsonTools/DiffResult.tsx b/pages/JsonTools/DiffResult.tsx
index cbde70f..e482d0f 100644
--- a/pages/JsonTools/DiffResult.tsx
+++ b/pages/JsonTools/DiffResult.tsx
@@ -27,14 +27,14 @@ export default function DiffResult({ result, viewMode, activePath }: DiffResultP
   }
 
   return (
-    <div className="p-3 rounded-lg bg-white border border-gray-200 font-mono text-sm overflow-x-auto min-h-[200px] max-h-[480px] overflow-y-auto">
+    <div className="p-3 rounded-lg bg-background border border-border font-mono text-sm overflow-x-auto min-h-[200px] max-h-[480px] overflow-y-auto">
       <UnifiedView node={result.root} depth={0} activePath={activePath} />
     </div>
   );
 }
 
 const SectionLabel = ({ text }: { text: string }) => (
-  <span className="block mb-1.5 text-[11px] font-extrabold tracking-wider text-gray-500 uppercase">
+  <span className="block mb-1.5 text-[11px] font-extrabold tracking-wider text-muted-foreground uppercase">
     {text}
   </span>
 );
@@ -61,7 +61,7 @@ const colorForType = (type: DiffType): string => {
   if (type === 'added') return 'text-green-600';
   if (type === 'removed') return 'text-red-600';
   if (type === 'modified') return 'text-amber-600';
-  return 'text-gray-900';
+  return 'text-foreground';
 };
 
 const bgForType = (type: DiffType): string | undefined => {
diff --git a/pages/JsonTools/JsonConvertSection.tsx b/pages/JsonTools/JsonConvertSection.tsx
index 8717cbf..5918d24 100644
--- a/pages/JsonTools/JsonConvertSection.tsx
+++ b/pages/JsonTools/JsonConvertSection.tsx
@@ -120,17 +120,17 @@ export default function JsonConvertSection({
 
       {/* 转换结果 */}
       {result && result.output ? (
-        <div className="relative rounded-lg bg-white border border-gray-200 overflow-hidden">
+        <div className="relative rounded-lg bg-background border border-border overflow-hidden">
           {/* 结果头部 */}
-          <div className="flex justify-between items-center px-4 py-2 border-b border-gray-200 bg-gray-50">
+          <div className="flex justify-between items-center px-4 py-2 border-b border-border bg-muted">
             <div className="flex gap-4 items-center">
-              <span className="text-[11px] font-extrabold text-gray-500">
+              <span className="text-[11px] font-extrabold text-muted-foreground">
                 {t(`jsonFormat:${pk}OutputLabel`)}
               </span>
-              <span className="text-[10px] text-gray-400">
+              <span className="text-[10px] text-muted-foreground">
                 {t('jsonFormat:originalSize')}: {formatByteSize(result.originalBytes)}
               </span>
-              <span className="text-[10px] text-gray-400">
+              <span className="text-[10px] text-muted-foreground">
                 {t('jsonFormat:formattedSize')}: {formatByteSize(result.outputBytes)}
               </span>
             </div>
@@ -143,8 +143,10 @@ export default function JsonConvertSection({
           </div>
         </div>
       ) : (
-        <div className="p-4 rounded-lg bg-gray-50 border border-dashed border-gray-300 text-center">
-          <p className="text-sm font-semibold text-gray-500">{t(`jsonFormat:${pk}EmptyHint`)}</p>
+        <div className="p-4 rounded-lg bg-muted border border-dashed border-input text-center">
+          <p className="text-sm font-semibold text-muted-foreground">
+            {t(`jsonFormat:${pk}EmptyHint`)}
+          </p>
         </div>
       )}
     </div>
diff --git a/pages/JsonTools/JsonDiffInput.tsx b/pages/JsonTools/JsonDiffInput.tsx
index 7ab3541..bb9c885 100644
--- a/pages/JsonTools/JsonDiffInput.tsx
+++ b/pages/JsonTools/JsonDiffInput.tsx
@@ -17,7 +17,7 @@ export default function JsonDiffInput({
 }: JsonDiffInputProps) {
   return (
     <div className="flex-1 min-w-0">
-      <span className="block mb-1.5 text-[11px] font-extrabold tracking-wider text-gray-500 uppercase">
+      <span className="block mb-1.5 text-[11px] font-extrabold tracking-wider text-muted-foreground uppercase">
         {label}
       </span>
       <TextInputArea
diff --git a/pages/JsonTools/JsonFormatSection.tsx b/pages/JsonTools/JsonFormatSection.tsx
index e60b5b3..aa036bd 100644
--- a/pages/JsonTools/JsonFormatSection.tsx
+++ b/pages/JsonTools/JsonFormatSection.tsx
@@ -73,7 +73,7 @@ export default function JsonFormatSection() {
       <div className="flex flex-col sm:flex-row gap-3 justify-between items-stretch sm:items-center">
         <div className="flex gap-3 items-center">
           {/* 缩进选择 */}
-          <span className="text-[11px] font-extrabold text-gray-500">
+          <span className="text-[11px] font-extrabold text-muted-foreground">
             {t('jsonFormat:indentSize')}
           </span>
           <SwitchButtonGroup
@@ -90,7 +90,7 @@ export default function JsonFormatSection() {
               type="checkbox"
               checked={sortKeys}
               onChange={(e) => setSortKeys(e.target.checked)}
-              className="h-4 w-4 rounded border-gray-300 text-blue-500 focus:ring-blue-500"
+              className="h-4 w-4 rounded border-input text-blue-500 focus:ring-primary"
             />
             <span className="text-xs font-bold">{t('jsonFormat:sortKeys')}</span>
           </label>
@@ -119,8 +119,8 @@ export default function JsonFormatSection() {
           onChange={(e) => setInput(e.target.value)}
           rows={6}
           className={`w-full rounded-lg border ${
-            error ? 'border-red-300' : 'border-gray-200'
-          } p-3 font-mono text-sm focus:outline-none focus:ring-2 focus:ring-blue-500 resize-y`}
+            error ? 'border-red-300' : 'border-border'
+          } p-3 font-mono text-sm focus:outline-none focus:ring-2 focus:ring-primary resize-y`}
         />
         {error && (
           <p className="mx-3 mt-1 text-xs font-semibold text-red-500">
@@ -131,17 +131,17 @@ export default function JsonFormatSection() {
 
       {/* 格式化结果 */}
       {result && result.formatted ? (
-        <div className="relative rounded-lg bg-white border border-gray-200 overflow-hidden">
+        <div className="relative rounded-lg bg-background border border-border overflow-hidden">
           {/* 结果头部 */}
-          <div className="flex justify-between items-center px-4 py-2 border-b border-gray-200 bg-gray-50">
+          <div className="flex justify-between items-center px-4 py-2 border-b border-border bg-muted">
             <div className="flex gap-4 items-center">
-              <span className="text-[11px] font-extrabold text-gray-500">
+              <span className="text-[11px] font-extrabold text-muted-foreground">
                 {t('jsonFormat:outputLabel')}
               </span>
-              <span className="text-[10px] text-gray-400">
+              <span className="text-[10px] text-muted-foreground">
                 {t('jsonFormat:originalSize')}: {formatByteSize(result.originalBytes)}
               </span>
-              <span className="text-[10px] text-gray-400">
+              <span className="text-[10px] text-muted-foreground">
                 {t('jsonFormat:formattedSize')}: {formatByteSize(result.formattedBytes)}
               </span>
             </div>
@@ -154,8 +154,8 @@ export default function JsonFormatSection() {
           </div>
         </div>
       ) : (
-        <div className="p-4 rounded-lg bg-gray-50 border border-dashed border-gray-300 text-center">
-          <p className="text-sm font-semibold text-gray-500">{t('jsonFormat:emptyHint')}</p>
+        <div className="p-4 rounded-lg bg-muted border border-dashed border-input text-center">
+          <p className="text-sm font-semibold text-muted-foreground">{t('jsonFormat:emptyHint')}</p>
         </div>
       )}
     </div>
diff --git a/pages/JsonTools/JsonTree.tsx b/pages/JsonTools/JsonTree.tsx
index 96bf739..f9b8afc 100644
--- a/pages/JsonTools/JsonTree.tsx
+++ b/pages/JsonTools/JsonTree.tsx
@@ -121,17 +121,17 @@ const NodeRow = ({
           onClick={() => setOverride(expanded ? 'closed' : 'open')}
           className={`cursor-pointer pr-1 py-0.5 ${bg ?? ''} ${
             isActive ? 'ring-2 ring-blue-500 rounded' : ''
-          } flex items-center gap-1 whitespace-nowrap hover:${bg ? 'bg-opacity-80' : 'bg-gray-50'}`}
+          } flex items-center gap-1 whitespace-nowrap hover:${bg ? 'bg-opacity-80' : 'bg-muted'}`}
           style={{ paddingLeft: `${depth * 1.5}rem` }}
         >
-          <span className="w-3 text-gray-500 text-[11px]">{expanded ? '▾' : '▸'}</span>
+          <span className="w-3 text-muted-foreground text-[11px]">{expanded ? '▾' : '▸'}</span>
           {!isRoot && (
-            <span className="text-gray-900 font-bold">{isArrayKeyDisplay(node.key)}:</span>
+            <span className="text-foreground font-bold">{isArrayKeyDisplay(node.key)}:</span>
           )}
-          <span className="text-gray-500">{open}</span>
-          {!expanded && <span className="text-gray-400 italic">{summarize(value)}</span>}
+          <span className="text-muted-foreground">{open}</span>
+          {!expanded && <span className="text-muted-foreground italic">{summarize(value)}</span>}
           {!expanded && (
-            <span className="text-gray-500">
+            <span className="text-muted-foreground">
               {close}
               {isLastChild ? '' : ','}
             </span>
@@ -154,7 +154,7 @@ const NodeRow = ({
         )}
         {expanded && (
           <div
-            className="text-gray-500 whitespace-nowrap"
+            className="text-muted-foreground whitespace-nowrap"
             style={{ paddingLeft: `${depth * 1.5 + 1.0625}rem` }}
           >
             {close}
@@ -175,8 +175,8 @@ const NodeRow = ({
       style={{ paddingLeft: `${depth * 1.5}rem` }}
     >
       <span className="w-3" />
-      {!isRoot && <span className="text-gray-900 font-bold">{isArrayKeyDisplay(node.key)}:</span>}
-      <span className={valueColor ?? 'text-gray-900'}>
+      {!isRoot && <span className="text-foreground font-bold">{isArrayKeyDisplay(node.key)}:</span>}
+      <span className={valueColor ?? 'text-foreground'}>
         {formatPrimitive(value)}
         {isLastChild ? '' : ','}
       </span>
@@ -206,7 +206,7 @@ export default function JsonTree({
 }: JsonTreeProps) {
   const sideKey = useMemo(() => side, [side]);
   return (
-    <div className="p-3 rounded-lg bg-white border border-gray-200 font-mono text-sm overflow-x-auto min-h-[200px] max-h-[480px] overflow-y-auto">
+    <div className="p-3 rounded-lg bg-background border border-border font-mono text-sm overflow-x-auto min-h-[200px] max-h-[480px] overflow-y-auto">
       <NodeRow
         node={node}
         side={sideKey}
diff --git a/pages/JsonTools/index.tsx b/pages/JsonTools/index.tsx
index 7d55361..1afe3d9 100644
--- a/pages/JsonTools/index.tsx
+++ b/pages/JsonTools/index.tsx
@@ -219,8 +219,10 @@ export default function Index() {
                   <DiffResult result={diffResult} viewMode={viewMode} activePath={activePath} />
                 </>
               ) : (
-                <div className="p-4 rounded-lg bg-gray-50 border border-dashed border-gray-300 text-center">
-                  <p className="text-sm font-semibold text-gray-500">{t('jsonDiff:emptyHint')}</p>
+                <div className="p-4 rounded-lg bg-muted border border-dashed border-input text-center">
+                  <p className="text-sm font-semibold text-muted-foreground">
+                    {t('jsonDiff:emptyHint')}
+                  </p>
                 </div>
               )}
             </>
diff --git a/pages/Jwt/index.tsx b/pages/Jwt/index.tsx
index dbefd2d..02b6a14 100644
--- a/pages/Jwt/index.tsx
+++ b/pages/Jwt/index.tsx
@@ -32,7 +32,7 @@ const Section = ({ title, content, color }: SectionProps) => {
           <CopyButton text={JSON.stringify(content)} size="small" />
         </div>
       </div>
-      <pre className="m-0 p-3 bg-white/60 rounded-lg text-xs font-mono overflow-x-auto whitespace-pre-wrap break-all border border-black/5">
+      <pre className="m-0 p-3 bg-background/60 rounded-lg text-xs font-mono overflow-x-auto whitespace-pre-wrap break-all border border-black/5">
         {content ? stringifyJson(content) : t('jwt:invalidFormat')}
       </pre>
     </div>
@@ -91,14 +91,14 @@ export default function Index() {
                 content={result.payload}
                 color="#d63aff" // JWT.io Payload Color
               />
-              <div className="p-4 rounded-xl border border-blue-200 bg-blue-50">
+              <div className="p-4 rounded-xl border border-primary/30 bg-primary/10">
                 <div className="flex justify-between items-center mb-2">
-                  <span className="text-sm font-bold tracking-wide text-blue-600">
+                  <span className="text-sm font-bold tracking-wide text-primary">
                     {t('jwt:signatureTitle')}
                   </span>
                   <CopyButton text={JSON.stringify(result.raw.signature)} size="small" />
                 </div>
-                <span className="block text-sm font-mono break-all text-gray-500 bg-white/60 p-3 rounded-lg border border-black/5">
+                <span className="block text-sm font-mono break-all text-muted-foreground bg-background/60 p-3 rounded-lg border border-black/5">
                   {result.signature || t('jwt:noSignature')}
                 </span>
               </div>
diff --git a/pages/MarkdownToHtml/index.tsx b/pages/MarkdownToHtml/index.tsx
index 396ce90..a0e5ac0 100644
--- a/pages/MarkdownToHtml/index.tsx
+++ b/pages/MarkdownToHtml/index.tsx
@@ -168,21 +168,21 @@ export default function MarkdownToHtmlPage() {
           <div className="flex gap-2">
             <button
               onClick={handleClear}
-              className="inline-flex items-center gap-1.5 px-3 py-1.5 text-sm font-medium text-gray-700 bg-white border border-gray-300 rounded-lg hover:bg-gray-50 transition-colors"
+              className="inline-flex items-center gap-1.5 px-3 py-1.5 text-sm font-medium text-foreground bg-background border border-input rounded-lg hover:bg-muted transition-colors"
             >
               <Trash2 size={14} />
               {t('clear')}
             </button>
             <button
               onClick={handlePrint}
-              className="inline-flex items-center gap-1.5 px-3 py-1.5 text-sm font-medium text-gray-700 bg-white border border-gray-300 rounded-lg hover:bg-gray-50 transition-colors"
+              className="inline-flex items-center gap-1.5 px-3 py-1.5 text-sm font-medium text-foreground bg-background border border-input rounded-lg hover:bg-muted transition-colors"
             >
               <Printer size={14} />
               {t('print')}
             </button>
             <button
               onClick={handleDownload}
-              className="inline-flex items-center gap-1.5 px-3 py-1.5 text-sm font-medium text-gray-700 bg-white border border-gray-300 rounded-lg hover:bg-gray-50 transition-colors"
+              className="inline-flex items-center gap-1.5 px-3 py-1.5 text-sm font-medium text-foreground bg-background border border-input rounded-lg hover:bg-muted transition-colors"
             >
               <Download size={14} />
               {t('download')}
@@ -205,10 +205,10 @@ export default function MarkdownToHtmlPage() {
         >
           {/* Markdown 输入区 */}
           {showInput && (
-            <div className="border border-gray-200 rounded-xl overflow-hidden flex flex-col">
-              <div className="flex items-center justify-between px-4 py-2 bg-blue-50/50 border-b border-gray-200">
-                <span className="text-xs font-bold text-gray-500">{t('inputLabel')}</span>
-                <span className="text-xs text-gray-400">
+            <div className="border border-border rounded-xl overflow-hidden flex flex-col">
+              <div className="flex items-center justify-between px-4 py-2 bg-primary/5 border-b border-border">
+                <span className="text-xs font-bold text-muted-foreground">{t('inputLabel')}</span>
+                <span className="text-xs text-muted-foreground">
                   {t('charCount', { count: markdown.length })}
                 </span>
               </div>
@@ -223,13 +223,13 @@ export default function MarkdownToHtmlPage() {
 
           {/* 预览/输出区 */}
           {showPreview && (
-            <div className="border border-gray-200 rounded-xl overflow-hidden flex flex-col">
-              <div className="flex items-center justify-between px-4 py-2 bg-blue-50/50 border-b border-gray-200">
-                <span className="text-xs font-bold text-gray-500">
+            <div className="border border-border rounded-xl overflow-hidden flex flex-col">
+              <div className="flex items-center justify-between px-4 py-2 bg-primary/5 border-b border-border">
+                <span className="text-xs font-bold text-muted-foreground">
                   {(previewMode as string) === 'html' ? t('htmlOutputLabel') : t('previewLabel')}
                 </span>
                 <div className="flex items-center gap-1">
-                  <span className="text-xs text-gray-400">
+                  <span className="text-xs text-muted-foreground">
                     {t('charCount', { count: result.htmlLength })}
                   </span>
                   <CopyButton text={result.html} size="small" />
@@ -240,10 +240,10 @@ export default function MarkdownToHtmlPage() {
                 <textarea
                   value={result.html}
                   readOnly
-                  className="flex-1 min-h-[400px] p-4 font-mono text-[0.8rem] leading-relaxed resize-none focus:outline-none bg-gray-50"
+                  className="flex-1 min-h-[400px] p-4 font-mono text-[0.8rem] leading-relaxed resize-none focus:outline-none bg-muted"
                 />
               ) : (
-                <div className="flex-1 p-4 min-h-[400px] overflow-auto bg-white">
+                <div className="flex-1 p-4 min-h-[400px] overflow-auto bg-background">
                   <iframe
                     ref={iframeRef}
                     title="markdown-preview"
diff --git a/pages/StorageCleaner/AutoRefreshToggle.tsx b/pages/StorageCleaner/AutoRefreshToggle.tsx
index 949d31b..c8c9d40 100644
--- a/pages/StorageCleaner/AutoRefreshToggle.tsx
+++ b/pages/StorageCleaner/AutoRefreshToggle.tsx
@@ -8,8 +8,8 @@ interface AutoRefreshToggleProps {
 export default function AutoRefreshToggle({ autoRefresh, onChange }: AutoRefreshToggleProps) {
   const { t } = useLazyTranslation('storageCleaner');
   return (
-    <div className="mb-3 p-4 rounded-lg bg-white border border-gray-200 flex justify-between items-center shadow-sm transition-all hover:shadow-md">
-      <span className="text-sm font-bold text-gray-700 px-3">
+    <div className="mb-3 p-4 rounded-lg bg-background border border-border flex justify-between items-center shadow-sm transition-all hover:shadow-md">
+      <span className="text-sm font-bold text-foreground px-3">
         {t('storageCleaner:autoRefresh')}
       </span>
       <label className="relative inline-flex items-center cursor-pointer">
@@ -19,7 +19,7 @@ export default function AutoRefreshToggle({ autoRefresh, onChange }: AutoRefresh
           onChange={(e) => onChange(e.target.checked)}
           className="sr-only peer"
         />
-        <div className="w-9 h-5 bg-gray-200 peer-focus:outline-none peer-focus:ring-2 peer-focus:ring-amber-300 rounded-full peer peer-checked:after:translate-x-full peer-checked:after:border-white after:content-[''] after:absolute after:top-[2px] after:left-[2px] after:bg-white after:border-gray-300 after:border after:rounded-full after:h-4 after:w-4 after:transition-all peer-checked:bg-amber-500" />
+        <div className="w-9 h-5 bg-gray-200 peer-focus:outline-none peer-focus:ring-2 peer-focus:ring-amber-300 rounded-full peer peer-checked:after:translate-x-full peer-checked:after:border-white after:content-[''] after:absolute after:top-[2px] after:left-[2px] after:bg-background after:border-input after:border after:rounded-full after:h-4 after:w-4 after:transition-all peer-checked:bg-amber-500" />
       </label>
     </div>
   );
diff --git a/pages/StorageCleaner/CleaningResult.tsx b/pages/StorageCleaner/CleaningResult.tsx
index 6024a58..75314b6 100644
--- a/pages/StorageCleaner/CleaningResult.tsx
+++ b/pages/StorageCleaner/CleaningResult.tsx
@@ -27,7 +27,7 @@ export default function CleaningResult({ result }: CleaningResultProps) {
         )}
         <span
           className={`text-sm font-semibold leading-relaxed ${
-            isSuccess ? 'text-green-700' : 'text-red-700'
+            isSuccess ? 'text-green-600' : 'text-red-700'
           }`}
         >
           {isSuccess
diff --git a/pages/StorageCleaner/ErrorDisplay.tsx b/pages/StorageCleaner/ErrorDisplay.tsx
index b72b2b7..a82f7c9 100644
--- a/pages/StorageCleaner/ErrorDisplay.tsx
+++ b/pages/StorageCleaner/ErrorDisplay.tsx
@@ -13,7 +13,7 @@ export default function ErrorDisplay({ error }: ErrorDisplayProps) {
         <div className="flex flex-col items-center justify-center rounded-lg p-6 shadow-lg border border-red-200 bg-red-50">
           <AlertCircle className="h-9 w-9 text-red-500 mb-3" />
           <p className="text-sm font-bold leading-relaxed mb-4 text-red-600">{error}</p>
-          <p className="text-xs font-medium leading-relaxed text-gray-500">
+          <p className="text-xs font-medium leading-relaxed text-muted-foreground">
             {t('storageCleaner:errorStandardOnly')}
           </p>
         </div>
diff --git a/pages/StorageCleaner/OptionItem.tsx b/pages/StorageCleaner/OptionItem.tsx
index 29908fb..702ef4e 100644
--- a/pages/StorageCleaner/OptionItem.tsx
+++ b/pages/StorageCleaner/OptionItem.tsx
@@ -22,23 +22,23 @@ export default function OptionItem({
       className={`flex justify-between items-center py-2 px-3 rounded-lg transition-all duration-200 ${
         checked
           ? 'bg-amber-50 border border-amber-200'
-          : 'bg-transparent border border-transparent hover:bg-gray-50 hover:shadow-sm'
+          : 'bg-transparent border border-transparent hover:bg-muted hover:shadow-sm'
       }`}
     >
       <div className="flex-1 min-w-0 mr-3">
         <span
           className={`block text-xs leading-tight truncate transition-colors ${
-            checked ? 'text-amber-700 font-bold' : 'text-gray-900 font-bold'
+            checked ? 'text-amber-700 font-bold' : 'text-foreground font-bold'
           }`}
         >
           {t(labelKey)}
         </span>
         {size !== undefined && size > 0 ? (
-          <span className="block text-[10px] font-semibold text-gray-500 mt-0.5 opacity-80">
+          <span className="block text-[10px] font-semibold text-muted-foreground mt-0.5 opacity-80">
             {isCount ? `${size} ${t('storageCleaner:countUnit')}` : formatSize(size)}
           </span>
         ) : (
-          <span className="block text-[10px] font-medium text-gray-400 mt-0.5 italic">
+          <span className="block text-[10px] font-medium text-muted-foreground mt-0.5 italic">
             {t('storageCleaner:noData')}
           </span>
         )}
@@ -47,7 +47,7 @@ export default function OptionItem({
         type="checkbox"
         checked={checked}
         onChange={onChange}
-        className="h-4 w-4 rounded border-gray-300 text-amber-500 focus:ring-amber-500"
+        className="h-4 w-4 rounded border-input text-amber-500 focus:ring-amber-500"
       />
     </div>
   );
diff --git a/pages/StorageCleaner/StorageOptionsGrid.tsx b/pages/StorageCleaner/StorageOptionsGrid.tsx
index c6cba96..4d0d903 100644
--- a/pages/StorageCleaner/StorageOptionsGrid.tsx
+++ b/pages/StorageCleaner/StorageOptionsGrid.tsx
@@ -31,7 +31,7 @@ export default function StorageOptionsGrid({
   ];
 
   return (
-    <div className="mb-3 border rounded-lg bg-white shadow-sm overflow-hidden transition-all hover:shadow-md">
+    <div className="mb-3 border rounded-lg bg-background shadow-sm overflow-hidden transition-all hover:shadow-md">
       <div className="p-3">
         <div className="grid grid-cols-2 gap-3">
           {optionKeys.map(({ key, isCount }) => (
@@ -48,13 +48,15 @@ export default function StorageOptionsGrid({
         </div>
       </div>
       <div className="border-t" />
-      <div className="flex justify-between items-center px-5 py-2 transition-colors hover:bg-gray-50 rounded-b-lg">
-        <span className="text-xs font-bold text-gray-500">{t('storageCleaner:selectAll')}</span>
+      <div className="flex justify-between items-center px-5 py-2 transition-colors hover:bg-muted rounded-b-lg">
+        <span className="text-xs font-bold text-muted-foreground">
+          {t('storageCleaner:selectAll')}
+        </span>
         <input
           type="checkbox"
           checked={allSelected}
           onChange={(e) => onSelectAll(e.target.checked)}
-          className="h-4 w-4 rounded border-gray-300 text-amber-500 focus:ring-amber-500"
+          className="h-4 w-4 rounded border-input text-amber-500 focus:ring-amber-500"
         />
       </div>
     </div>
diff --git a/pages/TextStatistics/index.tsx b/pages/TextStatistics/index.tsx
index eebd2a8..fc46b4c 100644
--- a/pages/TextStatistics/index.tsx
+++ b/pages/TextStatistics/index.tsx
@@ -66,7 +66,9 @@ export default function Index() {
                 borderColor: `${textStatisticsPageStyles.primaryColor}1a`,
               }}
             >
-              <span className="text-gray-500 whitespace-nowrap mb-0 md:mb-1">{item.label}</span>
+              <span className="text-muted-foreground whitespace-nowrap mb-0 md:mb-1">
+                {item.label}
+              </span>
               <span
                 className="break-all font-semibold"
                 style={{ color: textStatisticsPageStyles.primaryColor }}
diff --git a/pages/Timestamp/LiveClock.tsx b/pages/Timestamp/LiveClock.tsx
index c5cbb47..d74e134 100644
--- a/pages/Timestamp/LiveClock.tsx
+++ b/pages/Timestamp/LiveClock.tsx
@@ -37,17 +37,17 @@ const LiveClock = React.memo(({ unit, onUseNow }: LiveClockProps) => {
   }, [now, showMessage, t]);
 
   return (
-    <div className="flex items-center gap-3 px-4 py-2 mb-4 bg-blue-50 rounded-lg border border-blue-100">
-      <span className="text-blue-700 font-bold text-[0.65rem] uppercase tracking-wider whitespace-nowrap">
+    <div className="flex items-center gap-3 px-4 py-2 mb-4 bg-primary/10 rounded-lg border border-primary/20">
+      <span className="text-primary font-bold text-[0.65rem] uppercase tracking-wider whitespace-nowrap">
         {t('timestamp:currentTs')}
       </span>
-      <span className="flex-1 font-mono font-bold text-blue-700 text-sm tracking-tight leading-tight overflow-hidden text-ellipsis">
+      <span className="flex-1 font-mono font-bold text-primary text-sm tracking-tight leading-tight overflow-hidden text-ellipsis">
         {displayVal}
       </span>
       <button
         onClick={handleUseNow}
         title={t('timestamp:useNowTooltip')}
-        className="p-1.5 rounded-md bg-white text-blue-700 shadow-sm hover:bg-blue-700 hover:text-white transition-colors"
+        className="p-1.5 rounded-md bg-background text-primary shadow-sm hover:bg-blue-700 hover:text-white transition-colors"
       >
         <Clock className="w-4 h-4" />
       </button>
diff --git a/pages/Timestamp/ResultView.tsx b/pages/Timestamp/ResultView.tsx
index 3065cde..63d0f58 100644
--- a/pages/Timestamp/ResultView.tsx
+++ b/pages/Timestamp/ResultView.tsx
@@ -37,7 +37,7 @@ const ResultView = React.memo(
     if (!result) {
       if (!showEmptyPlaceholder) return null;
       return (
-        <div className="flex-1 flex items-center justify-center text-gray-400 text-sm font-semibold py-12 text-center">
+        <div className="flex-1 flex items-center justify-center text-muted-foreground text-sm font-semibold py-12 text-center">
           {t('timestamp:resultEmpty')}
         </div>
       );
@@ -45,12 +45,12 @@ const ResultView = React.memo(
 
     return (
       <div className="animate-in fade-in duration-300">
-        <span className="block text-gray-500 mb-3 text-xs font-bold">
+        <span className="block text-muted-foreground mb-3 text-xs font-bold">
           {t('timestamp:resultLabel')}
         </span>
 
-        <div className="bg-blue-50 p-5 rounded-xl relative mb-4 border border-blue-200 flex justify-between items-center">
-          <span className="font-mono font-bold text-blue-700 break-all pr-4 text-xl tracking-tight leading-tight">
+        <div className="bg-primary/10 p-5 rounded-xl relative mb-4 border border-primary/30 flex justify-between items-center">
+          <span className="font-mono font-bold text-primary break-all pr-4 text-xl tracking-tight leading-tight">
             {result}
           </span>
           <CopyButton
@@ -61,18 +61,18 @@ const ResultView = React.memo(
           />
         </div>
 
-        <div className="bg-blue-50/50 p-4 rounded-xl border border-blue-100 flex flex-col gap-3">
+        <div className="bg-primary/5 p-4 rounded-xl border border-primary/20 flex flex-col gap-3">
           {[
             { label: t('timestamp:relativeTime'), value: extraInfo?.relative },
             { label: t('timestamp:iso8601'), value: extraInfo?.iso },
             { label: t('timestamp:utcTime'), value: extraInfo?.utc },
           ].map((item) => (
             <div key={item.label} className="flex justify-between items-center">
-              <span className="text-gray-400 font-bold text-xs pr-2 whitespace-nowrap">
+              <span className="text-muted-foreground font-bold text-xs pr-2 whitespace-nowrap">
                 {item.label}
               </span>
               <div className="flex items-center gap-2 min-w-0">
-                <span className="font-mono text-blue-700 font-semibold text-xs break-all text-right">
+                <span className="font-mono text-primary font-semibold text-xs break-all text-right">
                   {item.value}
                 </span>
                 {item.value && (
diff --git a/pages/Timestamp/index.tsx b/pages/Timestamp/index.tsx
index 4b44f7b..714167b 100644
--- a/pages/Timestamp/index.tsx
+++ b/pages/Timestamp/index.tsx
@@ -41,7 +41,7 @@ export default function Index() {
         {/* 桌面端 md+ 左右分栏；移动端单栏堆叠 */}
         <div className="grid grid-cols-1 md:grid-cols-2 gap-4 items-stretch">
           {/* 左栏：转换工作台 */}
-          <div className="p-5 rounded-xl bg-white border border-gray-200 shadow-sm">
+          <div className="p-5 rounded-xl bg-background border border-border shadow-sm">
             {/* 模式切换 */}
             <SwitchButtonGroup
               value={mode}
@@ -63,8 +63,8 @@ export default function Index() {
                 value={mode === 'ts2dt' ? tsInput : dtInput}
                 onChange={(e) => setInput(e.target.value)}
                 className={`w-full px-4 py-2.5 rounded-lg border ${
-                  error ? 'border-red-500' : 'border-gray-300'
-                } bg-white text-sm font-mono font-semibold focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-transparent transition-all`}
+                  error ? 'border-red-500' : 'border-input'
+                } bg-background text-sm font-mono font-semibold focus:outline-none focus:ring-2 focus:ring-primary focus:border-transparent transition-all`}
               />
               {error && <p className="text-red-500 text-xs mt-1">{error}</p>}
 
@@ -84,7 +84,7 @@ export default function Index() {
                 <select
                   value={zone}
                   onChange={(e) => setZone(e.target.value as typeof zone)}
-                  className="flex-1 min-w-0 px-4 py-2.5 rounded-lg border border-gray-300 bg-white text-sm font-mono font-semibold focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-transparent transition-all"
+                  className="flex-1 min-w-0 px-4 py-2.5 rounded-lg border border-input bg-background text-sm font-mono font-semibold focus:outline-none focus:ring-2 focus:ring-primary focus:border-transparent transition-all"
                 >
                   {ZONES.map((z) => (
                     <option key={z} value={z} className="text-sm font-semibold">
@@ -98,14 +98,14 @@ export default function Index() {
             {/* 立即转换 */}
             <button
               onClick={convert}
-              className="block mx-auto mt-4 mb-1 max-w-[240px] w-full py-2.5 text-sm font-semibold rounded-lg bg-blue-600 text-white hover:bg-blue-700 focus:outline-none focus:ring-2 focus:ring-blue-500 focus:ring-offset-2 transition-all"
+              className="block mx-auto mt-4 mb-1 max-w-[240px] w-full py-2.5 text-sm font-semibold rounded-lg bg-primary text-white hover:bg-blue-700 focus:outline-none focus:ring-2 focus:ring-primary focus:ring-offset-2 transition-all"
             >
               {t('timestamp:convertButton')}
             </button>
           </div>
 
           {/* 右栏：结果展示卡片 */}
-          <div className="p-5 rounded-xl bg-white border border-gray-200 shadow-sm h-full flex flex-col">
+          <div className="p-5 rounded-xl bg-background border border-border shadow-sm h-full flex flex-col">
             <ResultView result={result} mode={mode} unit={unit} zone={zone} showEmptyPlaceholder />
           </div>
         </div>
diff --git a/tailwind.config.js b/tailwind.config.js
index 6e4716f..7710cb5 100644
--- a/tailwind.config.js
+++ b/tailwind.config.js
@@ -1,5 +1,6 @@
 /** @type {import('tailwindcss').Config} */
 export default {
+  darkMode: 'class',
   content: [
     './entrypoints/**/*.{js,ts,jsx,tsx}',
     './components/**/*.{js,ts,jsx,tsx}',
@@ -9,7 +10,32 @@ export default {
     './config/**/*.{js,ts,jsx,tsx}',
   ],
   theme: {
-    extend: {},
+    extend: {
+      colors: {
+        background: 'hsl(var(--background))',
+        foreground: 'hsl(var(--foreground))',
+        card: 'hsl(var(--card))',
+        'card-foreground': 'hsl(var(--card-foreground))',
+        popover: 'hsl(var(--popover))',
+        'popover-foreground': 'hsl(var(--popover-foreground))',
+        primary: 'hsl(var(--primary))',
+        'primary-foreground': 'hsl(var(--primary-foreground))',
+        secondary: 'hsl(var(--secondary))',
+        'secondary-foreground': 'hsl(var(--secondary-foreground))',
+        muted: 'hsl(var(--muted))',
+        'muted-foreground': 'hsl(var(--muted-foreground))',
+        accent: 'hsl(var(--accent))',
+        'accent-foreground': 'hsl(var(--accent-foreground))',
+        destructive: 'hsl(var(--destructive))',
+        'destructive-foreground': 'hsl(var(--destructive-foreground))',
+        border: 'hsl(var(--border))',
+        input: 'hsl(var(--input))',
+        ring: 'hsl(var(--ring))',
+      },
+      borderRadius: {
+        DEFAULT: 'var(--radius)',
+      },
+    },
   },
   plugins: [],
 };