diff --git a/src/modules/lesson-preparation/components/paper-editor/inline-qa-dialog.tsx b/src/modules/lesson-preparation/components/paper-editor/inline-qa-dialog.tsx
new file mode 100644
index 0000000..0ab2d84
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+++ b/src/modules/lesson-preparation/components/paper-editor/inline-qa-dialog.tsx
@@ -0,0 +1,91 @@
+"use client";
+
+import { useTranslations } from "next-intl";
+import type { InteractionBlockData, LessonPlanNode, QATurn } from "../../types";
+import { useLessonPlanEditor } from "../../hooks/use-lesson-plan-editor";
+
+interface Props {
+  node: LessonPlanNode;
+}
+
+/**
+ * V4 师生交互节点的 inline 对话体渲染。
+ * - 师/生 角色标签（JetBrains Mono）
+ * - 教师提问下方 italic 灰色 [预期：...]
+ * - 对话轮次之间 dashed 线分隔
+ */
+export function InlineQaDialog({ node }: Props) {
+  const t = useTranslations("lessonPreparation");
+  const toggleExpand = useLessonPlanEditor((s) => s.toggleExpand);
+  const data = node.data as InteractionBlockData;
+
+  return (
+    <div className="lp-inline-node">
+      <div className="lp-inline-node-head">
+        <span
+          style={{
+            width: 5,
+            height: 5,
+            borderRadius: "50%",
+            background: "var(--lp-dot-interaction)",
+            display: "inline-block",
+          }}
+        />
+        <span>{t("v4.interaction.label")}</span>
+        <span style={{ marginLeft: "auto", fontFamily: "JetBrains Mono, monospace", fontSize: 9, color: "var(--lp-inline-node-meta)" }}>
+          {data.turns?.length ?? 0} 轮
+        </span>
+        <button
+          type="button"
+          onClick={() => toggleExpand(node.id)}
+          style={{
+            cursor: "pointer",
+            padding: "2px 6px",
+            borderRadius: 3,
+            color: "var(--lp-inline-node-meta)",
+            fontSize: 11,
+            background: "transparent",
+            border: "none",
+          }}
+        >
+          {t("v4.contextMenu.collapseFromPaper")} ▴
+        </button>
+      </div>
+      <h4 className="lp-inline-node-title">{node.title}</h4>
+      <div className="lp-inline-node-body">
+        {data.designIntent && (
+          <p style={{ fontSize: 13, marginBottom: 8 }}>{data.designIntent}</p>
+        )}
+        <div className="lp-qa-dialog">
+          {(data.turns ?? []).map((turn, idx) => (
+            <QaTurnView key={turn.id} turn={turn} index={idx} />
+          ))}
+          {(!data.turns || data.turns.length === 0) && (
+            <p style={{ color: "var(--muted-foreground)", fontSize: 12 }}>
+              —
+            </p>
+          )}
+        </div>
+      </div>
+    </div>
+  );
+}
+
+function QaTurnView({ turn, index }: { turn: QATurn; index: number }) {
+  const t = useTranslations("lessonPreparation");
+  const roleClass = turn.role === "teacher" ? "teacher" : "student";
+  const roleLabel = turn.role === "teacher" ? t("v4.interaction.roleTeacher") : t("v4.interaction.roleStudent");
+  void index;
+
+  return (
+    <div className="lp-qa-turn">
+      <div className={`lp-qa-role ${roleClass}`}>{roleLabel}</div>
+      <div className="lp-qa-content">
+        {turn.content}
+        {turn.role === "teacher" && turn.expectedAnswer && (
+          <span className="lp-qa-prompt">[预期：{turn.expectedAnswer}]</span>
+        )}
+      </div>
+    </div>
+  );
+}