diff --git a/docs/components/093-progress.md b/docs/components/093-progress.md
index 36caa84..ebfc47f 100644
--- a/docs/components/093-progress.md
+++ b/docs/components/093-progress.md
@@ -42,7 +42,7 @@ mujica.Meter(c, 93, mujica.MeterOptions{
 | `Levels` | `*ui.MeterLevels` | `nil` | 阈值：达到 `Warning` 为偏高、达到 `Critical` 为严重；`Critical < Warning` 时低值为坏（如电量）。须在范围内。 |
 | `Label` | `string` | `""` | 名称。 |
 | `ShowValue` | `bool` | `false` | 显示“值 / 最大值”。 |
-| `Width` | `float32` | 填满 | 宽度。 |
+| `Width` | `float32` | 填满 | 宽度；负数、NaN 或无穷 panic。 |
 
 ## 状态
 
@@ -60,5 +60,5 @@ mujica.Meter(c, 93, mujica.MeterOptions{
 
 ## 限制
 
-- 环形直径小于 44 DIP 时百分比显示在旁边，而不是环内。
+- 百分比按缩放后的文字尺寸测量，放不进环内时显示在环旁边。
 - MyGo 不提供自定义无障碍数值的公开接口，因此必须基于 `ui.Progress` / `ui.Meter` 元素绘制。
diff --git a/feedback_review_test.go b/feedback_review_test.go
index d332dad..39db79e 100644
--- a/feedback_review_test.go
+++ b/feedback_review_test.go
@@ -60,6 +60,9 @@ func TestFeedbackRejectsInvalidInput(t *testing.T) {
 		"status unknown labeled": func(c *ui.Context) { StatusIndicator(c, 42, StatusIndicatorOptions{Label: "Custom"}) },
 		"alert severity":         func(c *ui.Context) { Alert(c, nil, "x", AlertOptions{Severity: 9}) },
 		"toast severity":         func(c *ui.Context) { ShowToast(c, ToastMessage{Message: "x", Severity: -1}) },
+		"meter negative width":   func(c *ui.Context) { Meter(c, 1, MeterOptions{Max: 2, Width: -1}) },
+		"meter NaN width":        func(c *ui.Context) { Meter(c, 1, MeterOptions{Max: 2, Width: float32(nan)}) },
+		"meter infinite width":   func(c *ui.Context) { Meter(c, 1, MeterOptions{Max: 2, Width: float32(inf)}) },
 	} {
 		func() {
 			defer func() {
@@ -82,3 +85,75 @@ func TestNotificationTitleOnlyHitHeight(t *testing.T) {
 		t.Fatalf("title-only notification hit box %v %v", r, ok)
 	}
 }
+
+func TestNotificationHeaderWrapsAtDoubleText(t *testing.T) {
+	items := []Notification{{ID: "a", Title: "Build failed"}, {ID: "b", Title: "Backup complete", Read: true}}
+	tt := ui.NewTester(func(c *ui.Context) {
+		Use(c, Settings{})
+		ui.Column(c).Width(520).Height(700).Children(func() {
+			NotificationCenter(c, &items, NotificationCenterOptions{})
+		})
+	}, 600, 760)
+	tt.SetPreferences(ui.Preferences{TextScale: 2})
+	for _, s := range []string{"Notifications", "1 unread", "Mark all read", "Clear all"} {
+		if r, ok := tt.Find(s); !ok || r.W == 0 || r.H == 0 || r.X < 0 || r.X+r.W > 520 {
+			t.Errorf("%q at 200%%: %v %v", s, r, ok)
+		}
+	}
+	if err := tt.Click("Clear all"); err != nil {
+		t.Fatal(err)
+	}
+	if len(items) != 0 {
+		t.Fatalf("Clear all at 200%% left %d items", len(items))
+	}
+}
+
+func TestProgressRingCaptionFitsAtDoubleText(t *testing.T) {
+	tt := ui.NewTester(func(c *ui.Context) {
+		Use(c, Settings{})
+		ui.Row(c).Children(func() {
+			Progress(c, 1, ProgressOptions{Shape: ProgressRing, ShowValue: true})
+		})
+	}, 400, 200)
+	for _, scale := range []float32{1, 2} {
+		tt.SetPreferences(ui.Preferences{TextScale: scale})
+		tt.Frame()
+		ring, ok := tt.Find("Loading")
+		text, ok2 := tt.Find("100%")
+		if !ok || !ok2 {
+			t.Fatalf("scale %v: ring %v text %v", scale, ok, ok2)
+		}
+		stroke := max(float32(3), ring.W/10)
+		inside := text.X >= ring.X+stroke && text.X+text.W <= ring.X+ring.W-stroke
+		outside := text.X >= ring.X+ring.W
+		if !inside && !outside {
+			t.Errorf("scale %v: caption %v clipped by ring %v", scale, text, ring)
+		}
+		if scale == 1 && !inside {
+			t.Errorf("caption left the ring at 100%%: %v", text)
+		}
+	}
+}
+
+func TestProgressResumesFromDisplayedValueAfterReducedMotion(t *testing.T) {
+	v := 0.0
+	var bar ui.Rect
+	tt := ui.NewTester(func(c *ui.Context) {
+		Use(c, Settings{Mode: Light})
+		ui.Column(c).Width(300).Children(func() {
+			bar = Progress(c, v, ProgressOptions{}).Bounds()
+		})
+	}, 400, 100)
+	tt.SetPreferences(ui.Preferences{ReduceMotion: true, TextScale: 1})
+	v = 0.5
+	tt.Frame()
+	tt.SetPreferences(ui.Preferences{TextScale: 1})
+	if got, want := progressPixel(tt, bar.X+bar.W*0.45, bar.Y+bar.H/2), theme.Light().AccentText; got != want {
+		t.Fatalf("after motion returned the fill at 45%% is %v, want %v", got, want)
+	}
+	v = 1
+	tt.Frame()
+	if got := progressPixel(tt, bar.X+bar.W*0.95, bar.Y+bar.H/2); got == theme.Light().AccentText {
+		t.Fatal("restored motion did not animate the next change")
+	}
+}
diff --git a/notification_center.go b/notification_center.go
index f712d4d..cbcb116 100644
--- a/notification_center.go
+++ b/notification_center.go
@@ -67,24 +67,28 @@ func NotificationCenter(c *ui.Context, items *[]Notification, opts NotificationC
 	panel := ui.Column(c).FillWidth().Shrink(1).MinHeight(0).Radius(theme.CardRadius).Background(k.Surface).Border(theme.BorderWidth, k.Border).
 		Role(ui.RoleGroup).Label(title).Clip()
 	panel.Children(func() {
-		ui.Row(c).AlignItems(ui.Center).Gap(u*2).Padding(u*3, u*3, u*3, u*4).Children(func() {
-			ui.Text(c, title).Font(theme.SerifFont).FontSize(FontSize(c, theme.H3Size)).TextColor(k.Text)
-			if unread > 0 {
-				ui.Text(c, fmt.Sprintf(msg(c, "notification_center.unread"), unread)).FontSize(FontSize(c, theme.CaptionSize)).TextColor(k.AccentText)
-			}
-			ui.Spacer(c)
-			if Button(c, msg(c, "notification_center.mark_all_read"), ButtonOptions{Variant: Ghost, Disabled: unread == 0}).Clicked() {
-				for i := range *items {
-					(*items)[i].Read = true
+		// Wraps so title and actions stay whole when text is enlarged.
+		ui.Row(c).Wrap().AlignItems(ui.Center).Justify(ui.SpaceBetween).Gap(u*2).Padding(u*3, u*3, u*3, u*4).Children(func() {
+			ui.Row(c).AlignItems(ui.Center).Gap(u * 2).Children(func() {
+				ui.Text(c, title).Font(theme.SerifFont).FontSize(FontSize(c, theme.H3Size)).TextColor(k.Text).SingleLine()
+				if unread > 0 {
+					ui.Text(c, fmt.Sprintf(msg(c, "notification_center.unread"), unread)).FontSize(FontSize(c, theme.CaptionSize)).TextColor(k.AccentText).SingleLine()
 				}
-				res.MarkedAllRead = true
-				slog.Debug("mujica: notification_center mark all read", "count", unread)
-			}
-			if Button(c, msg(c, "notification_center.clear_all"), ButtonOptions{Variant: Ghost, Disabled: len(*items) == 0}).Clicked() {
-				slog.Debug("mujica: notification_center clear all", "count", len(*items))
-				*items = (*items)[:0]
-				res.ClearedAll = true
-			}
+			})
+			ui.Row(c).AlignItems(ui.Center).Gap(u * 2).Children(func() {
+				if Button(c, msg(c, "notification_center.mark_all_read"), ButtonOptions{Variant: Ghost, Disabled: unread == 0}).Clicked() {
+					for i := range *items {
+						(*items)[i].Read = true
+					}
+					res.MarkedAllRead = true
+					slog.Debug("mujica: notification_center mark all read", "count", unread)
+				}
+				if Button(c, msg(c, "notification_center.clear_all"), ButtonOptions{Variant: Ghost, Disabled: len(*items) == 0}).Clicked() {
+					slog.Debug("mujica: notification_center clear all", "count", len(*items))
+					*items = (*items)[:0]
+					res.ClearedAll = true
+				}
+			})
 		})
 		// Ornament hairline under the panel title.
 		ui.Box(c).FillWidth().Height(1).Background(k.Ornament).Role(ui.RoleNone)
diff --git a/progress.go b/progress.go
index 08f60cd..1bac8af 100644
--- a/progress.go
+++ b/progress.go
@@ -78,8 +78,8 @@ func Progress(c *ui.Context, value float64, opts ProgressOptions) *ui.Element {
 		}
 		bar := ui.Progress(c, acc).Label(name).FillWidth().Height(u * 1.5).Radius(theme.ControlRadius).Background(k.Border)
 		shown := float32(value)
-		if !opts.Indeterminate && !still {
-			shown = bar.Animate("progress.value", shown, theme.StateDuration)
+		if !opts.Indeterminate {
+			shown = progressAnimate(bar, shown, still)
 		}
 		bar.Draw(func(p *ui.Painter, r ui.Rect) {
 			switch {
@@ -110,10 +110,13 @@ func progressRing(c *ui.Context, k theme.Tokens, u float32, acc float64, name, c
 	row.Children(func() {
 		ring := ui.Progress(c, acc).Label(name).Size(d, d).Radius(0).Background(ui.Transparent)
 		shown := float32(acc)
-		if !opts.Indeterminate && !still {
-			shown = ring.Animate("progress.value", shown, theme.StateDuration)
+		if !opts.Indeterminate {
+			shown = progressAnimate(ring, shown, still)
 		}
 		stroke := max(3, d/10)
+		size := FontSize(c, theme.CaptionSize)
+		tw, th := c.MeasureText(0, ui.Span{Text: caption, Size: size})
+		inside := caption != "" && !opts.Indeterminate && tw+4 <= d-2*stroke && th <= d-2*stroke
 		ring.Draw(func(p *ui.Painter, r ui.Rect) {
 			cx, cy, rad := internal.Snap(p, r.X+r.W/2), internal.Snap(p, r.Y+r.H/2), internal.Snap(p, (r.W-stroke)/2)
 			var track ui.Path
@@ -132,19 +135,19 @@ func progressRing(c *ui.Context, k theme.Tokens, u float32, acc float64, name, c
 				p.StrokePath(progressArc(p, cx, cy, rad, start, start+0.25), stroke, k.AccentText)
 			}
 		})
-		if caption != "" && d >= 44 && !opts.Indeterminate {
+		if inside {
 			ring.Children(func() {
-				ui.Text(c, caption).FontSize(FontSize(c, theme.CaptionSize)).FontFeatures("tnum").TextColor(k.Text)
+				ui.Text(c, caption).FontSize(size).FontFeatures("tnum").TextColor(k.Text)
 			})
 			ring.Center()
 		}
-		if opts.Label != "" || (caption != "" && (d < 44 || opts.Indeterminate)) {
+		if opts.Label != "" || (caption != "" && !inside) {
 			ui.Column(c).Children(func() {
 				if opts.Label != "" {
 					ui.Text(c, opts.Label).TextColor(k.Text)
 				}
-				if caption != "" && (d < 44 || opts.Indeterminate) {
-					ui.Text(c, caption).TextColor(k.TextMuted).FontSize(FontSize(c, theme.CaptionSize))
+				if caption != "" && !inside {
+					ui.Text(c, caption).TextColor(k.TextMuted).FontSize(size).FontFeatures("tnum")
 				}
 			})
 		}
@@ -152,6 +155,15 @@ func progressRing(c *ui.Context, k theme.Tokens, u float32, acc float64, name, c
 	return row
 }
 
+// progressAnimate eases toward target; under reduced motion it lands there and keeps the state in step.
+func progressAnimate(e *ui.Element, target float32, still bool) float32 {
+	if still {
+		// A changed target lands at once under reduced motion; the detour stops a running transition.
+		e.Animate("progress.value", target+1, theme.StateDuration)
+	}
+	return e.Animate("progress.value", target, theme.StateDuration)
+}
+
 // progressArc is the arc from turn a to turn b, clockwise from twelve o'clock.
 func progressArc(pt *ui.Painter, cx, cy, r float32, a, b float32) *ui.Path {
 	var p ui.Path
@@ -230,6 +242,9 @@ func Meter(c *ui.Context, value float64, opts MeterOptions) *ui.Element {
 	}
 	frac := func(v float64) float32 { return float32((v - lo) / (hi - lo)) }
 	col := ui.Column(c).Gap(u * 1.5)
+	if !(opts.Width >= 0) || math.IsInf(float64(opts.Width), 1) {
+		panic(fmt.Sprintf("mujica: Meter Width %v invalid", opts.Width))
+	}
 	if opts.Width > 0 {
 		col.Width(opts.Width)
 	} else {
diff --git a/testdata/snapshots/darwin/progress-dark.png b/testdata/snapshots/darwin/progress-dark.png
index cead596..14f8a0b 100644
Binary files a/testdata/snapshots/darwin/progress-dark.png and b/testdata/snapshots/darwin/progress-dark.png differ
diff --git a/testdata/snapshots/darwin/progress-light.png b/testdata/snapshots/darwin/progress-light.png
index 459659c..2e2b633 100644
Binary files a/testdata/snapshots/darwin/progress-light.png and b/testdata/snapshots/darwin/progress-light.png differ