diff --git a/src/components/ServerDetailOnlineHistory.tsx b/src/components/ServerDetailOnlineHistory.tsx
index af93f8c..48fbde4 100644
--- a/src/components/ServerDetailOnlineHistory.tsx
+++ b/src/components/ServerDetailOnlineHistory.tsx
@@ -245,7 +245,7 @@ export default function ServerDetailOnlineHistory({
 }) {
 	const { t } = useTranslation();
 	const { lastData } = useWebSocketContext();
-	const [days, setDays] = useState(DAY_OPTIONS[1]);
+	const [days, setDays] = useState(DAY_OPTIONS[0]);
 	const [guestMaxDays, setGuestMaxDays] = useState<number | null>(null);
 	const [periodMode, setPeriodMode] = useState<PeriodMode>("online");
 	const [visibleDays, setVisibleDays] = useState(PERIODS_INITIAL_DAYS);
diff --git a/src/components/loading/OnlineHistorySkeleton.tsx b/src/components/loading/OnlineHistorySkeleton.tsx
index c927d68..051d42c 100644
--- a/src/components/loading/OnlineHistorySkeleton.tsx
+++ b/src/components/loading/OnlineHistorySkeleton.tsx
@@ -30,7 +30,7 @@ function Metric({ footer = true }: { footer?: boolean }) {
 	);
 }
 
-export default function OnlineHistorySkeleton({ days = 7 }: { days?: number }) {
+export default function OnlineHistorySkeleton({ days = 1 }: { days?: number }) {
 	const { t } = useTranslation();
 	const dayCount = Math.min(31, Math.max(1, days) + 1);
 	const cardClassName = cn({
diff --git a/src/test/components/server-detail-online-history.test.tsx b/src/test/components/server-detail-online-history.test.tsx
index 207d4a8..2eef023 100644
--- a/src/test/components/server-detail-online-history.test.tsx
+++ b/src/test/components/server-detail-online-history.test.tsx
@@ -82,7 +82,7 @@ describe("ServerDetailOnlineHistory", () => {
 			screen.getByRole("status", { name: "serverOnlineHistory.loading" }),
 		).toHaveAttribute("aria-busy", "true");
 		expect(screen.getByTestId("online-history-loading")).toBeInTheDocument();
-		expect(apiMocks.fetchServerOnlineHistory).toHaveBeenCalledWith(7, 7);
+		expect(apiMocks.fetchServerOnlineHistory).toHaveBeenCalledWith(7, 1);
 	});
 
 	it("keeps existing content instead of flashing the skeleton while changing days", async () => {
@@ -299,7 +299,7 @@ describe("ServerDetailOnlineHistory", () => {
 
 		await user.click(screen.getByText("serverOnlineHistory.days30"));
 		expect(apiMocks.fetchServerOnlineHistory).toHaveBeenCalledTimes(1);
-		expect(apiMocks.fetchServerOnlineHistory).toHaveBeenCalledWith(7, 7);
+		expect(apiMocks.fetchServerOnlineHistory).toHaveBeenCalledWith(7, 1);
 	});
 
 	it("shows the login hint when the API rejects anonymous guests", async () => {
@@ -314,30 +314,34 @@ describe("ServerDetailOnlineHistory", () => {
 		).toBeInTheDocument();
 	});
 
-	it("falls back to one day and retries automatically for guests", async () => {
+	it("falls back to one day when guests request a longer window", async () => {
 		const user = userEvent.setup();
 		apiMocks.fetchServerOnlineHistory
+			.mockResolvedValueOnce(onlineHistoryResponse())
 			.mockRejectedValueOnce(
 				new Error("unauthorized: only 1d data available for guests"),
 			)
-			.mockResolvedValue(onlineHistoryResponse());
+			.mockResolvedValue(onlineHistoryResponse(1));
 
 		renderWithQuery(<ServerDetailOnlineHistory server_id="7" />);
 
-		// 首次 7d 被拒后自动以 1d 重试并渲染数据
+		// 首屏直接请求 1d；手动选择 7d 被拒后自动回退到 1d。
 		await screen.findByText("serverOnlineHistory.dailyOnline");
+		expect(apiMocks.fetchServerOnlineHistory).toHaveBeenNthCalledWith(1, 7, 1);
+		await user.click(screen.getByText("serverOnlineHistory.days7"));
 		await waitFor(() => {
 			expect(apiMocks.fetchServerOnlineHistory).toHaveBeenNthCalledWith(
-				2,
+				3,
 				7,
 				1,
 			);
 		});
+		expect(apiMocks.fetchServerOnlineHistory).toHaveBeenNthCalledWith(2, 7, 7);
 
 		// 更长窗口被锁定（游客上限 1 天），点击不再发起新请求
 		const calls = apiMocks.fetchServerOnlineHistory.mock.calls.length;
 		await user.click(screen.getByText("serverOnlineHistory.days30"));
-		expect(apiMocks.fetchServerOnlineHistory).toHaveBeenNthCalledWith(2, 7, 1);
+		expect(apiMocks.fetchServerOnlineHistory).toHaveBeenNthCalledWith(3, 7, 1);
 		expect(apiMocks.fetchServerOnlineHistory.mock.calls.length).toBe(calls);
 	});