养成基本完毕，新UI，修bug，装备初步，

Assets/EasyChart/Scripts/Runtime/Internal/ChartTextStyleApplier.cs

@@ -94,13 +94,13 @@ namespace EasyChart
             var state = label.userData as AppliedState;
 
             int themeId = theme != null ? theme.GetInstanceID() : 0;
-            UnityEngine.Object fontObj = theme != null ? theme.primaryFont : null;
+            UnityEngine.Object fontObj = ResolveRoleFontObject(theme, role);
             int fontId = fontObj != null ? fontObj.GetInstanceID() : 0;
 
             float scale = theme != null ? theme.fontScale : 1f;
             float roleSizeOverride = ResolveRoleFontSizeOverride(theme, role);
             float appliedRoleSizeOverride = roleSizeOverride;
-            if (roleSizeOverride >= 0f && HasInlineFontSize(label))
+            if (role != ChartTextRole.Tooltip && roleSizeOverride >= 0f && HasInlineFontSize(label))
             {
                 appliedRoleSizeOverride = -1f;
             }
@@ -225,6 +225,18 @@ namespace EasyChart
             }
         }
 
+        private static UnityEngine.Object ResolveRoleFontObject(ChartTheme theme, ChartTextRole role)
+        {
+            if (theme == null) return null;
+
+            if (role == ChartTextRole.Tooltip && theme.tooltipFont != null)
+            {
+                return theme.tooltipFont;
+            }
+
+            return theme.primaryFont;
+        }
+
         private static void ApplyFont(Label label, UnityEngine.Object fontObj)
         {
             if (label == null) return;