diff --git a/backend/app/api/knowledge_articles.py b/backend/app/api/knowledge_articles.py
index fa783f5d..10a5c4d8 100644
--- a/backend/app/api/knowledge_articles.py
+++ b/backend/app/api/knowledge_articles.py
@@ -10,6 +10,7 @@ from app.database import get_db
 from app.auth_middleware import require_role
 from app.deps import get_entity_id
 from app.models.knowledge_article import KnowledgeArticle
+from app.utils.route_key import candidate_route_keys, route_template_child_pattern
 
 router = APIRouter(prefix="/api/cma/knowledge-articles", tags=["知识库嵌入"],
     dependencies=[Depends(require_role("ceo", "finance", "business", "it"))],
@@ -51,7 +52,21 @@ def list_articles(
         )
     )
     if related_page:
-        q = q.filter(KnowledgeArticle.related_page.contains(related_page))
+        # KBFF-v11c（2026-10-12）：匹配口径由「子串包含 LIKE '%<v>%'」收敛为
+        # 「归一化候选键精确等值 ∪ 模板子路由」——消除短键/前缀超集命中
+        # （prop=/maps 曾连带命中 /maps/canvas + /maps-review；prop=/kpi 命中 /kpis）。
+        # 口径实现唯一处 = app/utils/route_key.py（调用方不得二次截断/拼接）。
+        keys = candidate_route_keys(related_page)
+        if not keys:
+            # 不可归一（纯 query/空白等）⇒ 明确无命中，不退化为“不过滤=全量”
+            return {"data": []}
+        conds = [KnowledgeArticle.related_page.in_(keys)]
+        for k in keys:
+            # 模板子路由：存储值形如 <键>/:<占位符>（占位符命名不限），仍属该页
+            conds.append(
+                KnowledgeArticle.related_page.like(route_template_child_pattern(k), escape="\\")
+            )
+        q = q.filter(or_(*conds))
     if category:
         q = q.filter(KnowledgeArticle.category == category)
     articles = q.order_by(KnowledgeArticle.sort_order.asc(), KnowledgeArticle.id.asc()).all()
diff --git a/backend/app/utils/route_key.py b/backend/app/utils/route_key.py
new file mode 100644
index 00000000..82f21108
--- /dev/null
+++ b/backend/app/utils/route_key.py
@@ -0,0 +1,128 @@
+# -*- coding: utf-8 -*-
+"""路由键归一与候选键派生（KBFF-v11c，2026-10-12）
+
+背景（隐患）：
+    知识文章列表接口原用 ``KnowledgeArticle.related_page.contains(related_page)``
+    ⇒ SQL ``LIKE '%<prop>%'`` **子串包含**。prop 取短键/前缀即超集命中：
+    prop=``/maps`` 会同时命中 ``/maps/canvas`` 与 ``/maps-review``；prop=``/kpi`` 命中 ``/kpis``。
+
+口径（本模块 = related_page 匹配口径的**唯一实现处**）：
+    匹配 = 「归一化候选键集合的**精确等值**」∪「模板子路由（``<键>/:<占位符>``）」。
+    调用方只传原始路由串，**不得**自行截断/拼接/大小写变换 —— 否则会出现第二套口径。
+
+归一化规则（``normalize_route``）：
+    ① 去首尾空白；丢弃 ``?query`` 与 ``#fragment``；
+    ② 反斜杠 → ``/``；压缩连续 ``/``；补前导 ``/``；
+    ③ 去末尾 ``/``（根 ``/`` 保留）；
+    ④ 统一小写（CMA 前端路由均小写定义，容忍手工录入大小写差异）。
+
+候选键（``candidate_route_keys``）—— 带参路由兼容：
+    入参可能是**具体实例路径**（如 ``/maps/canvas/42``），而表内存的是**页面身份**
+    （``/maps/canvas``）或**模板形式**（``/maps/canvas/:id``，见模型注释）。
+    故候选键 = 归一化完整路径 ∪ 父路径（末段为变量时）∪ 各自模板形式，
+    匹配走 ``related_page IN (候选键)`` —— 全程等值，无任意子串包含。
+
+    变量段判据：纯数字 / 长十六进制（≥8） / UUID。
+    占位符命名不统一时（他方可能写 ``:articleId``），由调用方叠加
+    ``route_template_child_pattern(key)`` 给出的前缀模式兜住，见该函数。
+"""
+from __future__ import annotations
+
+import re
+from typing import List, Optional, Tuple
+
+#: 变量段占位符（与 app/models/knowledge_article.py 注释 ``如 /maps/canvas/:id`` 同约定）
+PARAM_PLACEHOLDER = ":id"
+
+_UUID_RE = re.compile(
+    r"^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$"
+)
+_HEX_RE = re.compile(r"^[0-9a-f]{8,}$")
+_NUM_RE = re.compile(r"^\d+$")
+_MULTI_SLASH_RE = re.compile(r"/{2,}")
+
+
+def normalize_route(path: Optional[str]) -> str:
+    """把任意路由串归一为比较键。不可归一时返回空串（调用方须按“无命中”处理）。"""
+    if path is None:
+        return ""
+    s = str(path).strip()
+    if not s:
+        return ""
+    # 丢弃 query / fragment（保留原有 path 语义）
+    s = s.split("?", 1)[0].split("#", 1)[0]
+    s = s.replace("\\", "/").strip()
+    if not s:
+        return ""
+    if not s.startswith("/"):
+        s = "/" + s
+    s = _MULTI_SLASH_RE.sub("/", s)
+    s = s.lower()
+    if len(s) > 1:
+        s = s.rstrip("/")
+    return s or "/"
+
+
+def is_variable_segment(seg: str) -> bool:
+    """段是否形如变量实例（数字 / 长十六进制 / UUID）。"""
+    if not seg:
+        return False
+    if _UUID_RE.match(seg):
+        return True
+    if _NUM_RE.match(seg):
+        return True
+    return bool(_HEX_RE.match(seg))
+
+
+def is_dynamic_segment(seg: str) -> bool:
+    """段是否「动态」：变量实例（``42``）或占位符本身（``:id`` / ``:articleId``）。
+
+    用于从动态末段回推页面身份（父路径），使「传具体实例」与「传模板串」两种调用姿势
+    都能命中表内的页面身份键。
+    """
+    return seg.startswith(":") or is_variable_segment(seg)
+
+
+def _split(path: str) -> List[str]:
+    return [p for p in path.split("/") if p]
+
+
+def template_route(path: str) -> str:
+    """把变量段替换为占位符，得到模板形式（``/maps/canvas/42`` → ``/maps/canvas/:id``）。"""
+    segs = _split(path)
+    if not segs:
+        return path
+    return "/" + "/".join(PARAM_PLACEHOLDER if is_variable_segment(s) else s for s in segs)
+
+
+def candidate_route_keys(path: Optional[str]) -> Tuple[str, ...]:
+    """归一化候选键集合（已排序去重）。空元组 = 不可归一 ⇒ 无命中。"""
+    key = normalize_route(path)
+    if not key:
+        return ()
+    keys = {key}
+    segs = _split(key)
+    if segs:
+        keys.add(template_route(key))
+        # 末段是动态段（变量实例 / 占位符）⇒ 补父路径（及父路径的模板形式）
+        if is_dynamic_segment(segs[-1]) and len(segs) > 1:
+            parent = "/" + "/".join(segs[:-1])
+            keys.add(parent)
+            keys.add(template_route(parent))
+    return tuple(sorted(keys))
+
+
+def escape_like(value: str) -> str:
+    """转义 LIKE 元字符（配合 ``escape='\\\\'`` 使用）。"""
+    return value.replace("\\", "\\\\").replace("%", "\\%").replace("_", "\\_")
+
+
+def route_template_child_pattern(key: str) -> str:
+    """模板子路由前缀模式：``<键>/:<任意占位符>``（含更深层级）。
+
+    ``/maps/canvas`` → ``/maps/canvas/:%`` —— 只命中“把该页声明为模板”的存储值
+    （``/maps/canvas/:id`` / ``/maps/canvas/:articleId``），
+    不会命中兄弟页（``/maps-review`` 之类），也不命中更深的静态页
+    （``/maps/canvas/detail`` 不含前导 ``:``）。
+    """
+    return escape_like(key) + "/:%"
diff --git a/backend/tests/test_kbff_v11c_related_page_exact_match_20261012.py b/backend/tests/test_kbff_v11c_related_page_exact_match_20261012.py
new file mode 100644
index 00000000..8d0cc3ff
--- /dev/null
+++ b/backend/tests/test_kbff_v11c_related_page_exact_match_20261012.py
@@ -0,0 +1,255 @@
+# -*- coding: utf-8 -*-
+"""KBFF-v11c · `/knowledge-articles?related_page=` 过滤精确化回归（2026-10-12）
+
+派单：`KBFF-v11c-relatedpage-exact-match-filter`（A 侧 wecom-yanxue）
+口径实现：`app/utils/route_key.py`；改造点：`app/api/knowledge_articles.py`
+纪律：本文件只新增测试，不改 app/**、conftest.py、任何既有 test_*.py。
+
+覆盖：
+  §1 单位：normalize_route / candidate_route_keys / route_template_child_pattern（表驱动）
+  §2 负对照：证明改造前 contains 语义确会超集命中（同库同 seed 直构旧表达式）
+  §3 生产 seed 7 值逐值回归（值取自 backend/scripts/seed_knowledge_articles.py）
+     —— 每个值各自只中自己那 1 行；短键 `/maps` 0 行、`/kpi` 0 行
+  §4 带参路由 / 尾斜杠 / query-fragment / 大小写 / 不可归一 兼容面
+  §5 模板子路由（存储值写占位符，任意占位符命名均可命中）
+  §6 既有语义保持：账套分区 + category 组合过滤不受影响
+"""
+import pytest
+from fastapi.testclient import TestClient
+from sqlalchemy.orm import Session
+
+from app.models import Entity
+from app.models.knowledge_article import KnowledgeArticle
+from app.utils.route_key import (
+    candidate_route_keys,
+    normalize_route,
+    route_template_child_pattern,
+    template_route,
+)
+from tests.conftest import auth_header, create_test_user
+
+KA = "/api/cma/knowledge-articles"
+
+#: 生产 seed 的 7 个 related_page 值（backend/scripts/seed_knowledge_articles.py:41,61,83,113,139,166,189）
+SEED = [
+    (1, "/maps/canvas"),
+    (2, "/kpis"),
+    (3, "/budget"),
+    (4, "/deviations"),
+    (5, "/predict"),
+    (6, "/maps-review"),
+    (7, "/alerts"),
+]
+
+
+# ── 夹具 ────────────────────────────────────────────────────────────
+
+def _ensure_entity(db: Session, eid: int, name: str = None, short: str = None) -> Entity:
+    e = db.query(Entity).filter(Entity.id == eid).first()
+    if e:
+        return e
+    e = Entity(id=eid, name=name or f"实体{eid}", short_name=short or f"E{eid}", status="active")
+    db.add(e)
+    db.commit()
+    db.refresh(e)
+    return e
+
+
+def _login(client: TestClient, entity_id: int = 1) -> str:
+    r = client.post("/api/cma/auth/login", json={
+        "username": "testadmin", "password": "test-fixture-pass", "entity_id": entity_id,
+    })
+    assert r.status_code == 200, r.text
+    j = r.json()
+    return j.get("token") or j.get("access_token")
+
+
+def _seed_rows(db: Session, rows) -> None:
+    """rows: [(id, related_page)]，全局共享（entity_id=None）便于账套无关复算。"""
+    for i, rp in rows:
+        db.add(KnowledgeArticle(title=f"seed-{i}", content="c", category="term",
+                                entity_id=None, related_page=rp, sort_order=i))
+    db.commit()
+
+
+# ── §1 单位 ─────────────────────────────────────────────────────────
+
+@pytest.mark.parametrize("raw,expected", [
+    ("/maps/canvas", "/maps/canvas"),
+    ("/maps/canvas/", "/maps/canvas"),
+    ("/maps//canvas/", "/maps/canvas"),
+    ("maps/canvas", "/maps/canvas"),
+    ("/MAPS/Canvas", "/maps/canvas"),
+    ("/maps/canvas?id=42", "/maps/canvas"),
+    ("/maps/canvas#top", "/maps/canvas"),
+    ("  /budget  ", "/budget"),
+    ("/", "/"),
+    ("", ""),
+    ("   ", ""),
+    (None, ""),
+    ("?only=query", ""),
+])
+def test_u1_normalize_route(raw, expected):
+    assert normalize_route(raw) == expected
+
+
+@pytest.mark.parametrize("raw,expect_members,expect_absent", [
+    ("/maps/canvas", {"/maps/canvas"}, {"/maps", "/maps/canvas/:id"}),
+    ("/maps/canvas/42", {"/maps/canvas/42", "/maps/canvas", "/maps/canvas/:id"},
+     set()),
+    ("/maps/canvas/:id", {"/maps/canvas/:id", "/maps/canvas"}, {"/maps"}),
+    ("/maps", {"/maps"}, {"/maps/canvas"}),
+    ("/kpi", {"/kpi"}, {"/kpis"}),
+    ("", set(), set()),
+    ("   ", set(), set()),
+])
+def test_u2_candidate_route_keys(raw, expect_members, expect_absent):
+    keys = candidate_route_keys(raw)
+    assert set(keys) >= expect_members, f"{raw} -> {keys}"
+    assert not (set(keys) & expect_absent), f"{raw} 不该派生 {expect_absent}：{keys}"
+    assert list(keys) == sorted(keys), "候选键须排序去重，便于同库复算与取证"
+
+
+@pytest.mark.parametrize("path,expected", [
+    ("/maps/canvas/42", "/maps/canvas/:id"),
+    ("/maps/canvas", "/maps/canvas"),
+    ("/kpis", "/kpis"),
+])
+def test_u3_template_route(path, expected):
+    assert template_route(path) == expected
+
+
+def test_u4_template_child_pattern_shape():
+    assert route_template_child_pattern("/maps/canvas") == "/maps/canvas/:%"
+    # LIKE 元字符须转义（否则用户串可注入通配）
+    assert route_template_child_pattern("/a_b%c") == "/a\\_b\\%c/:%"
+
+
+# ── §2 负对照（改造前语义） ──────────────────────────────────────────
+
+def test_n1_contains_semantics_superset_control(client: TestClient, db: Session):
+    """负对照：旧 `.contains()` 语义下 `/maps` 超集命中 2 行、`/kpi` 命中 `/kpis`。
+    证明本改造确有行为变化（不是“改了个等价写法”）。"""
+    create_test_user(db)
+    _seed_rows(db, SEED)
+    tok = _login(client)
+    assert client.get(f"{KA}?related_page=/maps/canvas", headers=auth_header(tok)).status_code == 200
+
+    def old_query(v):
+        return (db.query(KnowledgeArticle)
+                .filter(KnowledgeArticle.related_page.contains(v))
+                .order_by(KnowledgeArticle.id.asc()).all())
+
+    assert [r.related_page for r in old_query("/maps")] == ["/maps/canvas", "/maps-review"]
+    assert [r.related_page for r in old_query("/kpi")] == ["/kpis"]
+    # 生成 SQL 亦确认为子串包含
+    sql = str(db.query(KnowledgeArticle)
+              .filter(KnowledgeArticle.related_page.contains("/maps"))
+              .statement.compile(compile_kwargs={"literal_binds": True}))
+    assert "LIKE" in sql and "%" in sql
+
+
+# ── §3 生产 seed 7 值逐值回归 ────────────────────────────────────────
+
+def test_f1_seven_seed_values_exact(client: TestClient, db: Session):
+    create_test_user(db)
+    _seed_rows(db, SEED)
+    tok = _login(client)
+
+    for sid, rp in SEED:
+        r = client.get(f"{KA}?related_page={rp}", headers=auth_header(tok))
+        assert r.status_code == 200, r.text
+        got = [(i["id"], i["related_page"]) for i in r.json()["data"]]
+        assert got == [(sid, rp)], f"{rp} 期望精确 1 行({sid})，实得 {got}"
+
+
+def test_f2_short_key_and_prefix_zero(client: TestClient, db: Session):
+    """短键/前缀必须 0 行：/maps（否则连带 /maps/canvas + /maps-review）、/kpi（否则 /kpis）。"""
+    create_test_user(db)
+    _seed_rows(db, SEED)
+    tok = _login(client)
+    for prop in ["/maps", "/kpi", "/map", "/budg", "/alerts-extra", "/maps-revie"]:
+        r = client.get(f"{KA}?related_page={prop}", headers=auth_header(tok))
+        assert r.status_code == 200, r.text
+        assert r.json()["data"] == [], f"{prop} 应 0 行，实得 {r.json()['data']}"
+
+
+# ── §4 兼容面 ───────────────────────────────────────────────────────
+
+@pytest.mark.parametrize("prop,expect_id", [
+    ("/maps/canvas/42", 1),        # 带参实例 → 父页 + 模板派生
+    ("/maps/canvas/:id", 1),       # 模板形式直传
+    ("/maps/canvas/", 1),          # 尾斜杠
+    ("/MAPS/CANVAS", 1),           # 大小写
+    ("/maps/canvas?id=42", 1),     # query
+    ("/budget%23top", 3),          # fragment（编码传参，验证落库前的截断）
+    ("%20%20/kpis%20%20", 2),      # 首尾空白
+    ("/alerts", 7),
+])
+def test_f3_compat_forms(client: TestClient, db: Session, prop, expect_id):
+    create_test_user(db)
+    _seed_rows(db, SEED)
+    tok = _login(client)
+    r = client.get(f"{KA}?related_page={prop}", headers=auth_header(tok))
+    assert r.status_code == 200, r.text
+    assert {i["id"] for i in r.json()["data"]} == {expect_id}, f"{prop} -> {r.json()['data']}"
+
+
+def test_f4_unmatchable_prop_returns_empty_not_all(client: TestClient, db: Session):
+    """不可归一入参（纯 query/空白）⇒ 空集，**不得**退化为“不过滤=全量”。"""
+    create_test_user(db)
+    _seed_rows(db, SEED)
+    tok = _login(client)
+    for prop in ["%20", "?only=query", "%23frag"]:
+        r = client.get(f"{KA}?related_page={prop}", headers=auth_header(tok))
+        assert r.status_code == 200, r.text
+        assert r.json()["data"] == [], f"{prop} 应空集，实得 {len(r.json()['data'])} 行"
+
+
+# ── §5 模板子路由 ───────────────────────────────────────────────────
+
+@pytest.mark.parametrize("stored,prop,hit", [
+    ("/maps/canvas/:articleId", "/maps/canvas", True),
+    ("/maps/canvas/:id/step", "/maps/canvas", True),
+    ("/maps/canvas", "/maps/canvas", True),
+    ("/maps-review", "/maps", False),
+    ("/maps/canvas/detail", "/maps/canvas/detail", True),
+])
+def test_f5_template_child(db: Session, client: TestClient, stored, prop, hit):
+    create_test_user(db)
+    _seed_rows(db, [(1, stored)])
+    tok = _login(client)
+    r = client.get(f"{KA}?related_page={prop}", headers=auth_header(tok))
+    assert r.status_code == 200, r.text
+    got = r.json()["data"]
+    if hit:
+        assert [i["related_page"] for i in got] == [stored], f"{prop} 应命中 {stored}，实得 {got}"
+    else:
+        assert got == [], f"{prop} 不应命中 {stored}"
+
+
+# ── §6 既有语义保持 ────────────────────────────────────────────────
+
+def test_f6_partition_and_category_still_hold(client: TestClient, db: Session):
+    """账套分区（本企业 ∪ 全局）与 category 组合过滤在精确口径下不变。"""
+    _ensure_entity(db, 2, "陕西博海", "博海")
+    rows = [
+        KnowledgeArticle(title="K1", content="c", entity_id=1, related_page="/kpis", category="term"),
+        KnowledgeArticle(title="K2", content="c", entity_id=1, related_page="/kpis", category="practice"),
+        KnowledgeArticle(title="K3", content="c", entity_id=1, related_page="/budget", category="term"),
+        KnowledgeArticle(title="K4", content="c", entity_id=None, related_page=None, category="term"),
+        KnowledgeArticle(title="K5", content="c", entity_id=2, related_page="/kpis", category="term"),
+    ]
+    db.add_all(rows)
+    db.commit()
+    for a in rows:
+        db.refresh(a)
+    create_test_user(db)
+    tok = _login(client)
+
+    rp = client.get(f"{KA}?related_page=/kpis", headers=auth_header(tok)).json()["data"]
+    assert {i["id"] for i in rp} == {rows[0].id, rows[1].id}
+    rc = client.get(f"{KA}?category=term", headers=auth_header(tok)).json()["data"]
+    assert {i["id"] for i in rc} == {rows[0].id, rows[2].id, rows[3].id}
+    rb = client.get(f"{KA}?related_page=/kpis&category=term", headers=auth_header(tok)).json()["data"]
+    assert {i["id"] for i in rb} == {rows[0].id}