diff --git a/src/pages/Home.tsx b/src/pages/Home.tsx
index 7bc80fb..d142003 100644
--- a/src/pages/Home.tsx
+++ b/src/pages/Home.tsx
@@ -48,10 +48,11 @@ export default function StationDashboard() {
 		const el = powerTrendCardRef.current;
 		if (!el) return;
 		try {
-			if (!document.fullscreenElement) {
-				await el.requestFullscreen();
-			} else {
+			// 只有当前全屏的是本卡片时才退出，否则请求卡片全屏（兼容页面整体全屏）
+			if (document.fullscreenElement === el) {
 				await document.exitFullscreen();
+			} else {
+				await el.requestFullscreen();
 			}
 		} catch (err) {
 			console.error('全屏切换异常：', err);
@@ -65,7 +66,8 @@ export default function StationDashboard() {
 
 	useEffect(() => {
 		const onFullScreenChange = () => {
-			setIsPowerCardFullscreen(!!document.fullscreenElement);
+			// 只有发电趋势卡片本身全屏时才拉伸，页面整体全屏时保持原有尺寸
+			setIsPowerCardFullscreen(document.fullscreenElement === powerTrendCardRef.current);
 		};
 		document.addEventListener('fullscreenchange', onFullScreenChange);
 		return () => {
@@ -326,7 +328,7 @@ export default function StationDashboard() {
 								<UniversalLineChart
 									data={powerTrendData}
 									xKey="time"
-									height={isPowerCardFullscreen ? window.innerHeight : 200}
+									height={isPowerCardFullscreen ? 'calc(100vh - 96px)' : 200}
 									smooth
 									dot
 									backgroundColor="transparent"