diff --git a/src/features/agent/answer-ui/interactive-chart.tsx b/src/features/agent/answer-ui/interactive-chart.tsx
index 35edb1d..2832e74 100644
--- a/src/features/agent/answer-ui/interactive-chart.tsx
+++ b/src/features/agent/answer-ui/interactive-chart.tsx
@@ -172,10 +172,10 @@ export const InteractiveChart = memo(function InteractiveChartView(props: Answer
           </dl>
       </motion.section> : null}
       <p className="flex items-start gap-1.5 border-t pt-2.5 text-[11px] leading-5 text-muted-foreground">
-        <Database size={12} className="mt-1 shrink-0" /><span>{fullRange ? labels.length : `${labels.length} / ${props.x_data.length}`} 个数据点 · {visible.length} 组序列<br />来源：{props.source}</span>
+        <Database size={12} className="mt-1 shrink-0" /><span className="min-w-0 break-words [overflow-wrap:anywhere]">{fullRange ? labels.length : `${labels.length} / ${props.x_data.length}`} 个数据点 · {visible.length} 组序列<br />来源：{props.source}</span>
       </p>
   </>;
-  return <Collapsible asChild><Card className={`answer-ui-chart overflow-hidden ${props.embedded || props.expanded ? "border-0 shadow-none" : ""} ${props.expanded ? "@container flex h-full min-h-[360px] min-w-0 flex-1 flex-col" : ""}`} role={props.embedded ? undefined : "group"} aria-label={props.embedded ? undefined : props.title}
+  return <Collapsible asChild><Card className={`answer-ui-chart overflow-hidden ${props.embedded || props.expanded ? "border-0 shadow-none" : ""} ${props.expanded ? "@container flex h-full min-h-0 min-w-0 flex-1 flex-col" : ""}`} role={props.embedded ? undefined : "group"} aria-label={props.embedded ? undefined : props.title}
     onPointerDownCapture={() => { pointer.current = true; }}
     onKeyDownCapture={() => {
       pointer.current = false;
@@ -200,8 +200,8 @@ export const InteractiveChart = memo(function InteractiveChartView(props: Answer
     </CardHeader>
     <CardContent className={`${props.expanded ? "flex min-h-0 flex-1 flex-col" : "space-y-3"} px-3.5 pb-3.5 pt-0`}>
       {migrationNotice ? <p role="status" className="text-xs leading-5 text-muted-foreground">{migrationNotice}</p> : null}
-      <Tabs value={view} onValueChange={setView} className={props.expanded ? "grid min-h-0 flex-1 grid-cols-1 grid-rows-[auto_auto_minmax(220px,1fr)_minmax(0,auto)] gap-x-4 gap-y-2 @min-[640px]:grid-cols-[minmax(0,1fr)_208px] @min-[640px]:grid-rows-[auto_auto_minmax(220px,1fr)]" : undefined}>
-        <TabsList aria-label={`${props.title}显示方式`} className={`${props.expanded ? "col-start-1 row-start-1" : "mb-3"} relative grid w-full grid-cols-3 [&>[role=tab]]:relative [&>[role=tab]]:z-10 [&>[role=tab][data-state=active]]:bg-transparent [&>[role=tab][data-state=active]]:shadow-none`}>
+      <Tabs value={view} onValueChange={setView} className={props.expanded ? "grid min-h-0 flex-1 grid-cols-1 grid-rows-[auto_auto_minmax(120px,1fr)_minmax(0,auto)] gap-x-3 gap-y-2 @min-[560px]:grid-cols-[minmax(0,1fr)_176px] @min-[560px]:grid-rows-[auto_auto_minmax(120px,1fr)]" : undefined}>
+        <TabsList aria-label={`${props.title}显示方式`} className={`${props.expanded ? "col-start-1 row-start-1 min-w-0" : "mb-3"} relative grid w-full grid-cols-3 [&>[role=tab]]:relative [&>[role=tab]]:z-10 [&>[role=tab][data-state=active]]:bg-transparent [&>[role=tab][data-state=active]]:shadow-none`}>
           <motion.span aria-hidden className="pointer-events-none absolute inset-y-1 left-1 rounded-md bg-card shadow-xs"
             style={{ width: "calc((100% - 0.5rem) / 3)" }}
             initial={false} animate={{ x: view === "line" ? "0%" : view === "bar" ? "100%" : "200%" }}
@@ -210,10 +210,10 @@ export const InteractiveChart = memo(function InteractiveChartView(props: Answer
           <TabsTrigger value="bar"><BarChart3 size={13} />柱状</TabsTrigger>
           <TabsTrigger value="table"><Table2 size={13} />数据</TabsTrigger>
         </TabsList>
-        <aside className={props.expanded ? "col-start-1 row-start-4 max-h-44 min-h-0 space-y-3 overflow-y-auto border-t border-border pt-3 @min-[640px]:col-start-2 @min-[640px]:row-start-1 @min-[640px]:row-span-3 @min-[640px]:max-h-none @min-[640px]:border-t-0 @min-[640px]:border-l @min-[640px]:pt-0 @min-[640px]:pl-3" : undefined}>
-        <div className={`answer-ui-chart-series mb-2 flex flex-wrap gap-2 ${props.expanded ? "@min-[640px]:flex-col @min-[640px]:flex-nowrap @min-[640px]:items-stretch" : ""}`} aria-label="显示的数据序列">
+        <aside className={props.expanded ? "col-start-1 row-start-4 max-h-32 min-h-0 min-w-0 space-y-2 overflow-y-auto border-t border-border pt-2 @min-[560px]:col-start-2 @min-[560px]:row-start-1 @min-[560px]:row-span-3 @min-[560px]:max-h-none @min-[560px]:border-t-0 @min-[560px]:border-l @min-[560px]:pt-0 @min-[560px]:pl-3" : undefined}>
+        <div className={`answer-ui-chart-series mb-2 flex flex-wrap gap-2 ${props.expanded ? "@min-[560px]:flex-col @min-[560px]:flex-nowrap @min-[560px]:items-stretch" : ""}`} aria-label="显示的数据序列">
           {props.series.map((series, index) => <Button key={index} size="sm" variant="outline"
-            className={`h-auto min-h-8 max-w-full gap-1.5 whitespace-normal text-left text-[11px] ${props.expanded ? "justify-start" : ""}`} aria-pressed={!hidden.includes(index)}
+            className={`h-auto min-h-8 min-w-0 max-w-full gap-1.5 whitespace-normal text-left text-[11px] after:inset-0 ${props.expanded ? "justify-start" : ""}`} aria-pressed={!hidden.includes(index)}
             disabled={visible.length === 1 && !hidden.includes(index)}
             onClick={() => { setAnimateInteraction(pointer.current && !reducedMotion); patch({ hidden: hidden.includes(index) ? hidden.filter((item) => item !== index) : [...hidden, index],
               table: { query: "", ...table, sort: null, selection: [] } }, ["hidden", "table/sort"]); }}>
@@ -230,7 +230,7 @@ export const InteractiveChart = memo(function InteractiveChartView(props: Answer
         </div> : null}
         {props.expanded ? metadata : null}
         </aside>
-        <div className={props.expanded ? "col-start-1 row-start-2" : undefined}>
+        <div className={props.expanded ? "col-start-1 row-start-2 min-w-0" : undefined}>
         {!fullRange ? <p className="mb-2 text-[11px] text-muted-foreground">{props.x_data[range[0]]} 至 {props.x_data[range[1]]}</p> : null}
         <CollapsibleContent className="mb-2 space-y-2 rounded-lg border bg-muted/30 p-2.5">
           <div className="flex items-center gap-2">
@@ -244,10 +244,10 @@ export const InteractiveChart = memo(function InteractiveChartView(props: Answer
             onClick={() => setRange([0, props.x_data.length - 1])}>重置范围</Button>
         </CollapsibleContent>
         </div>
-        <motion.div className={props.expanded ? "col-start-1 row-start-3 min-h-0" : undefined} data-chart-view={view} initial={false} animate={contentMotion}>
+        <motion.div className={props.expanded ? "col-start-1 row-start-3 min-h-0 min-w-0" : undefined} data-chart-view={view} initial={false} animate={contentMotion}>
         {(["line", "bar"] as const).map((type) => <TabsContent key={type} value={type} className={props.expanded ? "h-full min-h-0" : undefined}>
           <div ref={view === type ? plot : undefined} role="group" aria-label={`${props.title}，按回车查看数据点，方向键切换数据点`} tabIndex={0}
-            className={`${props.expanded ? "h-full min-h-0 overflow-auto" : ""} rounded-md focus-visible:outline-2 focus-visible:outline-ring`}
+            className={`${props.expanded ? (type === "bar" && horizontalBars ? "h-full min-h-0 overflow-x-hidden overflow-y-auto" : "h-full min-h-0 overflow-hidden") : ""} rounded-md focus-visible:outline-2 focus-visible:outline-ring`}
             onKeyDown={(event) => {
               if (event.target !== event.currentTarget) return;
               if (["Enter", "ArrowLeft", "ArrowRight", "Home", "End"].includes(event.key)) {
diff --git a/src/features/workbench/components/investigation-presentation-panel.tsx b/src/features/workbench/components/investigation-presentation-panel.tsx
index a9df3d9..34d8115 100644
--- a/src/features/workbench/components/investigation-presentation-panel.tsx
+++ b/src/features/workbench/components/investigation-presentation-panel.tsx
@@ -312,9 +312,9 @@ export function InvestigationPresentationPanel({
                       <div className="flex shrink-0 items-center gap-1">
                         <FloatingWindow title={item.chart.title} fillContent
                           openRequestKey={chartWindowKey === undefined ? undefined : JSON.stringify([chartWindowKey, item])}>
-                          {() => <div className="flex h-full min-h-[420px] min-w-0 flex-col gap-3">
+                          {() => <div className="flex h-full min-h-0 min-w-0 flex-col gap-2">
                             <AgentChartView chart={item.chart} embedded expanded />
-                            <div className="shrink-0">{references(item.evidence_refs)}</div>
+                            {item.evidence_refs.length ? <div className="max-h-[35%] shrink-0 overflow-auto">{references(item.evidence_refs)}</div> : null}
                           </div>}
                         </FloatingWindow>
                         <Button
diff --git a/tests/browser/investigation-chart-windows.e2e.ts b/tests/browser/investigation-chart-windows.e2e.ts
index f46c907..bacb312 100644
--- a/tests/browser/investigation-chart-windows.e2e.ts
+++ b/tests/browser/investigation-chart-windows.e2e.ts
@@ -116,3 +116,60 @@ test("structured analysis charts open responsive windows in local preview and hi
   await expect(popup).toBeVisible();
   expect(mock.mutations).toEqual([]);
 });
+
+test("live charts fit desktop and narrow windows without outer scrollbars", async ({ page }, testInfo) => {
+  const task = investigationFixture(1, "实时图表紧凑布局核查");
+  const mock = await mockInvestigationPresentation(page, [task]);
+  await selectInvestigation(page, task.title);
+  await mock.emit(task, chart(1));
+  const popup = page.getByRole("dialog", { name: "合成压力分析 1", exact: true });
+  const content = popup.locator("[data-floating-window-content]");
+  await expect(popup.getByRole("img", { name: "合成压力分析 1", exact: true })).toBeVisible();
+  for (const [width, height] of [[1440, 900], [1280, 720], [800, 600], [375, 540], [320, 540]]) {
+    await page.setViewportSize({ width, height });
+    await expect.poll(() => content.evaluate((node) => ({
+      x: node.scrollWidth - node.clientWidth,
+      y: node.scrollHeight - node.clientHeight
+    }))).toEqual({ x: 0, y: 0 });
+    const plot = popup.getByRole("img", { name: "合成压力分析 1", exact: true });
+    expect((await plot.boundingBox())!.height).toBeGreaterThanOrEqual(120);
+    await testInfo.attach(`live-chart-fit-${width}`, {
+      body: await popup.screenshot({ path: testInfo.outputPath(`live-chart-fit-${width}.png`) }), contentType: "image/png"
+    });
+  }
+  await page.setViewportSize({ width: 1280, height: 720 });
+  await popup.getByRole("button", { name: "筛选数据范围", exact: true }).click();
+  await expect(popup.getByRole("combobox", { name: "区间起点" })).toBeVisible();
+  await expect.poll(() => content.evaluate((node) => node.scrollHeight - node.clientHeight)).toBe(0);
+  await popup.getByRole("tab", { name: "数据", exact: true }).click();
+  await expect(popup.getByRole("table")).toBeVisible();
+  expect(mock.mutations).toEqual([]);
+});
+
+test("SCADA chart axes and legends fit every nested container", async ({ page }, testInfo) => {
+  const task = investigationFixture(1, "SCADA 压力布局核查");
+  const mock = await mockInvestigationPresentation(page, [task]);
+  await selectInvestigation(page, task.title);
+  await mock.emit(task, { action: "open_chart", chart_id: "scada-pressure", evidence_refs: ["synthetic:pressure"], chart: {
+    title: "SCADA 回放压力：异常前后（2026-07-16，UTC+8）", chart_type: "line",
+    x_axis_name: "时间（UTC+8）", y_axis_name: "压力（m）", x_data: ["07:30", "07:45", "08:00"],
+    series: [{ name: "测点 123748（实测回放）", data: [26.2, 25.7, 23.5] },
+      { name: "测点 159673（实测回放）", data: [24.9, 24.87, 21.6] }]
+  } });
+  const popup = page.getByRole("dialog", { name: "SCADA 回放压力：异常前后（2026-07-16，UTC+8）", exact: true });
+  await expect(popup).toBeVisible();
+  await expect.poll(() => popup.evaluate((node) => Array.from(node.querySelectorAll<HTMLElement>("*"))
+    .filter((element) => {
+      const style = getComputedStyle(element);
+      return (style.overflowX === "auto" || style.overflowX === "scroll" || style.overflowY === "auto" || style.overflowY === "scroll") &&
+        (element.scrollWidth > element.clientWidth || element.scrollHeight > element.clientHeight);
+    }).map((element) => ({ class: element.className, x: element.scrollWidth - element.clientWidth, y: element.scrollHeight - element.clientHeight }))
+  )).toEqual([]);
+  const plot = popup.getByRole("group", { name: /按回车查看数据点/ });
+  await expect.poll(() => plot.evaluate((element) => ({
+    x: element.scrollWidth - element.clientWidth, y: element.scrollHeight - element.clientHeight
+  }))).toEqual({ x: 0, y: 0 });
+  await testInfo.attach("scada-chart-layout", {
+    body: await popup.screenshot({ path: testInfo.outputPath("scada-chart-layout.png") }), contentType: "image/png"
+  });
+});