diff --git a/components/CopyButton.tsx b/components/CopyButton.tsx
index 99570de..608edf7 100644
--- a/components/CopyButton.tsx
+++ b/components/CopyButton.tsx
@@ -15,7 +15,7 @@ export const CopyButton: React.FC<CopyButtonProps> = ({
   text,
   tooltip,
   variant = 'ghost',
-  size = 'sm',
+  size = 'icon',
   className,
   ...props
 }) => {
@@ -55,7 +55,6 @@ export const CopyButton: React.FC<CopyButtonProps> = ({
       title={tooltip ?? t('buttons.copy')}
       className={cn(
         buttonVariants({ variant, size }),
-        'h-8 w-8',
         copied &&
           'bg-emerald-500/10 text-emerald-600 dark:text-emerald-400 hover:bg-emerald-500/10',
         className,
diff --git a/pages/Timestamp/LiveClock.tsx b/pages/Timestamp/LiveClock.tsx
index 736e7c5..a503e87 100644
--- a/pages/Timestamp/LiveClock.tsx
+++ b/pages/Timestamp/LiveClock.tsx
@@ -88,8 +88,7 @@ const LiveClock = React.memo(({ unit, onUseNow, className, ...props }: LiveClock
       <CopyButton
         text={currentDisplay.text}
         tooltip={t('timestamp:copyTsTooltip')}
-        size="sm"
-        className="h-7 w-7 rounded-md border" // 移除了硬编码的颜色配置表，完全交由组件的内置 Class 渲染
+        className="h-7 w-7 rounded-md border"
       />
     </div>
   );