diff --git a/assets/webui/ofdgo.js b/assets/webui/ofdgo.js
index a649950..6a523ea 100644
--- a/assets/webui/ofdgo.js
+++ b/assets/webui/ofdgo.js
@@ -10609,7 +10609,7 @@ function fitWidthScale(page) {
 			available = Math.max(1, available - scrollbarWidth());
 		}
 	}
-	return Math.min(4, Math.max(0.2, available / width));
+	return Math.min(4, available / width);
 }
 
 function fitHeight(updateStatus = true) {
@@ -10664,7 +10664,8 @@ function applyFit(updateStatus = true) {
 
 function setScale(nextScale, updateStatus = true, fitMode = "free") {
 	const anchor = updateStatus && fitMode === "free" ? scaleAnchor() : null;
-	const scale = Math.min(4, Math.max(0.2, nextScale));
+	// 适配缩放不受手动下限限制，避免大页面撑出视区。
+	const scale = Math.min(4, fitMode === "free" ? Math.max(0.2, nextScale) : nextScale);
 	const layoutChanged = scale !== state.scale || fitMode !== state.fitMode;
 	state.fitMode = fitMode;
 	state.scale = scale;