diff --git a/yunke-server/app/analytics/metrics.py b/yunke-server/app/analytics/metrics.py
new file mode 100644
index 0000000..2f5ff46
--- /dev/null
+++ b/yunke-server/app/analytics/metrics.py
@@ -0,0 +1,291 @@
+"""A1/A3/B2 指标函数——纯查询,口径速查表见 spec §8。
+
+时区:day 键一律 Asia/Shanghai 自然日(Python 侧算,禁 SQL 日期函数)。
+周起始=周一(scope=week)。
+"""
+from __future__ import annotations
+
+import datetime as dt
+from collections.abc import Iterable
+from typing import Any
+from zoneinfo import ZoneInfo
+
+import sqlalchemy as sa
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.db.models import MsgDailyStats, PhoneCall, StatDailyStaff
+from app.storage.staff_summary import account_map
+from app.storage.staff_summary import has_rows as _staff_rows
+from app.storage.summary import day_bounds_ms
+
+_SH = ZoneInfo("Asia/Shanghai")
+
+
+def _date_key(d: dt.date) -> int:
+    return d.year * 10000 + d.month * 100 + d.day
+
+
+def today_key(now: dt.datetime | None = None) -> int:
+    """上海自然日 yyyymmdd(测试 monkeypatch 点)。"""
+    return _date_key((now or dt.datetime.now(_SH)).date())
+
+
+def _day_date(day: int) -> dt.date:
+    return dt.date(day // 10000, (day // 100) % 100, day % 100)
+
+
+def scope_day_keys(scope: str, today: int) -> list[int]:
+    """today={今};week=本周一..今天;month=本月1号..今天(含端点)。"""
+    end = _day_date(today)
+    if scope == "today":
+        start = end
+    elif scope == "week":
+        start = end - dt.timedelta(days=end.weekday())  # 周一=0
+    elif scope == "month":
+        start = end.replace(day=1)
+    else:
+        raise ValueError(f"bad scope: {scope!r}")
+    out, cur = [], start
+    while cur <= end:
+        out.append(_date_key(cur))
+        cur += dt.timedelta(days=1)
+    return out
+
+
+def _prev_scope_days(scope: str, days: list[int]) -> list[int]:
+    """紧邻的前一个等长窗口(环比;今日 scope 不调用)。"""
+    n = len(days)
+    last = _day_date(days[0]) - dt.timedelta(days=1)
+    return [
+        _date_key(last - dt.timedelta(days=i))
+        for i in range(n - 1, -1, -1)
+    ]
+
+
+async def _day_rows(
+    session: AsyncSession, channel: str, days: Iterable[int]
+) -> list[Any]:
+    return (
+        await session.execute(
+            sa.select(
+                MsgDailyStats.day,
+                MsgDailyStats.peer_kind,
+                MsgDailyStats.peer_id,
+                MsgDailyStats.send_cnt,
+                MsgDailyStats.recv_cnt,
+            ).where(
+                MsgDailyStats.channel == channel, MsgDailyStats.day.in_(list(days))
+            )
+        )
+    ).all()
+
+
+async def _call_count(session: AsyncSession, channel_scope_days: list[int]) -> int:
+    """phone_call 落窗计数(3k 行小表;start_call_time ms 与 day 键边界换算)。"""
+    if not channel_scope_days:
+        return 0
+    lo, _hi = day_bounds_ms(channel_scope_days[0])
+    hi_day_start, _ = day_bounds_ms(channel_scope_days[-1])
+    hi = hi_day_start + 86_400_000  # 含末日全天
+    val = (
+        await session.execute(
+            sa.select(sa.func.count()).select_from(PhoneCall).where(
+                PhoneCall.start_call_time.is_not(None),
+                PhoneCall.start_call_time >= lo,
+                PhoneCall.start_call_time < hi,
+            )
+        )
+    ).scalar_one()
+    return int(val)
+
+
+async def _first_contact(
+    session: AsyncSession, channel: str, days: list[int]
+) -> int:
+    """首次沟通客户数:peer 按渠道全史 MIN(day) 落窗(跨员工归一,不跨渠道)。"""
+    rows = (
+        await session.execute(
+            sa.select(MsgDailyStats.peer_id, sa.func.min(MsgDailyStats.day))
+            .where(
+                MsgDailyStats.channel == channel,
+                MsgDailyStats.peer_kind == "friend",
+            )
+            .group_by(MsgDailyStats.peer_id)
+        )
+    ).all()
+    dayset = set(days)
+    return sum(1 for _peer, first in rows if first in dayset)
+
+
+async def _active_staff(
+    session: AsyncSession, channel: str, days: list[int]
+) -> int:
+    """活跃员工 distinct user_id;stat_daily_staff 空表回退 msg_daily_stats+映射。"""
+    if await _staff_rows(session):
+        val = (
+            await session.execute(
+                sa.select(sa.func.count(sa.func.distinct(StatDailyStaff.user_id))).where(
+                    StatDailyStaff.channel == channel,
+                    StatDailyStaff.day.in_(days),
+                )
+            )
+        ).scalar_one()
+        return int(val)
+    amap = await account_map(session, channel)
+    owners = {amap.get(o, o) for (o,) in (
+        await session.execute(
+            sa.select(MsgDailyStats.owner_account_id).where(
+                MsgDailyStats.channel == channel, MsgDailyStats.day.in_(days)
+            )
+        )
+    ).all()}
+    return len(owners)
+
+
+def anomaly_threshold() -> float:
+    return 0.5  # 昨日 vs 前 7 日均值偏离阈值,v1 固定
+
+
+async def anomaly(session: AsyncSession, channel: str) -> dict | None:
+    """E0-lite 异常警示:昨日总量 vs 前 7 日均值偏离>50%,明细到员工。"""
+    today = today_key()
+    yesterday = _day_date(today) - dt.timedelta(days=1)
+
+    yday = _date_key(yesterday)
+    prev7 = [_date_key(yesterday - dt.timedelta(days=i)) for i in range(1, 8)]
+
+    use_rollup = await _staff_rows(session)
+    if use_rollup:
+        rows = (
+            await session.execute(
+                sa.select(
+                    StatDailyStaff.day, StatDailyStaff.user_id,
+                    sa.func.coalesce(StatDailyStaff.msg_sent + StatDailyStaff.msg_recv, 0),
+                ).where(
+                    StatDailyStaff.channel == channel,
+                    StatDailyStaff.day.in_([yday] + prev7),
+                )
+            )
+        ).all()
+    else:
+        amap = await account_map(session, channel)
+        raw = (
+            await session.execute(
+                sa.select(
+                    MsgDailyStats.day, MsgDailyStats.owner_account_id,
+                    sa.func.coalesce(
+                        sa.func.sum(MsgDailyStats.send_cnt + MsgDailyStats.recv_cnt), 0
+                    ),
+                )
+                .where(
+                    MsgDailyStats.channel == channel,
+                    MsgDailyStats.day.in_([yday] + prev7),
+                )
+                .group_by(MsgDailyStats.day, MsgDailyStats.owner_account_id)
+            )
+        ).all()
+        rows = [(d, amap.get(o, o), v) for d, o, v in raw]
+
+    # 逐 user 显式算(yesterday 量 + prev7 均值),不猜 rows 顺序
+    day_rows: dict[str, dict[int, int]] = {}
+    for day, uid, v in rows:
+        day_rows.setdefault(uid, {})[day] = int(v)
+
+    staff_out = []
+    totals_y, totals_p = 0, 0.0
+    for uid, by_day in day_rows.items():
+        y = by_day.get(yday, 0)
+        pvals = [by_day.get(d, 0) for d in prev7]
+        pmean = sum(pvals) / len(pvals) if pvals else 0.0
+        totals_y += y
+        totals_p += pmean
+        if pmean > 0 and abs(y - pmean) / pmean > anomaly_threshold():
+            staff_out.append({
+                "user_id": uid,
+                "yesterday": y,
+                "prev7_mean": round(pmean, 1),
+            })
+    if totals_p <= 0:
+        return None
+    delta = (totals_y - totals_p) / totals_p
+    if abs(delta) > anomaly_threshold():
+        return {
+            "total_delta_pct": round(delta, 3),
+            "yesterday_total": totals_y,
+            "prev7_mean": round(totals_p, 1),
+            "staff": sorted(staff_out, key=lambda s: s["yesterday"]),
+        }
+    return None
+
+
+async def overview(
+    session: AsyncSession, *, channel: str, scope: str, trend_days: int = 30
+) -> dict[str, Any]:
+    """A1:卡片 + 环比(仅周/月) + 近 N 天趋势 + 异常警示。"""
+    today = today_key()
+    days = scope_day_keys(scope, today)
+    rows = await _day_rows(session, channel, days)
+    msg_total = sum(int(s or 0) + int(r or 0) for _d, _k, _p, s, r in rows)
+    active_customers = len({p for _d, kind, p, _s, _r in rows if kind == "friend"})
+
+    cards: dict[str, Any] = {
+        "msg_total": msg_total,
+        "active_customers": active_customers,
+        "active_staff": await _active_staff(session, channel, days),
+        "call_cnt": await _call_count(session, days),
+        "first_contact": await _first_contact(session, channel, days),
+    }
+
+    # 环比仅周/月(今日 vs 昨日全天会误导,spec §8)
+    if scope in ("week", "month"):
+        prev_days = _prev_scope_days(scope, days)
+        prev_rows = await _day_rows(session, channel, prev_days)
+        prev_total = sum(int(s or 0) + int(r or 0) for _d, _k, _p, s, r in prev_rows)
+        cards["prev_msg_total"] = prev_total
+        cards["msg_total_delta"] = (
+            round((msg_total - prev_total) / prev_total, 3) if prev_total else None
+        )
+
+    # 趋势:近 trend_days 天 每日 消息量/活跃客户/通话量
+    end = _day_date(today)
+    t_days = []
+    cur = end - dt.timedelta(days=trend_days - 1)
+    while cur <= end:
+        t_days.append(_date_key(cur))
+        cur += dt.timedelta(days=1)
+    t_rows = await _day_rows(session, channel, t_days)
+    by_day: dict[int, dict] = {d: {"msg": 0, "cust": set()} for d in t_days}
+    for d, kind, p, s, r in t_rows:
+        by_day[d]["msg"] += int(s or 0) + int(r or 0)
+        if kind == "friend":
+            by_day[d]["cust"].add(p)
+    # 通话趋势:phone_call 拉窗内 (start_call_time) Python 侧按日分桶(3k 行)
+    lo, _ = day_bounds_ms(t_days[0])
+    hi_day, _ = day_bounds_ms(t_days[-1])
+    calls = (
+        await session.execute(
+            sa.select(PhoneCall.start_call_time).where(
+                PhoneCall.start_call_time.is_not(None),
+                PhoneCall.start_call_time >= lo,
+                PhoneCall.start_call_time < hi_day + 86_400_000,
+            )
+        )
+    ).scalars().all()
+    call_by_day: dict[int, int] = {}
+    for ts in calls:
+        k = _date_key(dt.datetime.fromtimestamp(ts / 1000, _SH).date())
+        call_by_day[k] = call_by_day.get(k, 0) + 1
+    trend = [
+        {"day": d, "msg": v["msg"], "active_customers": len(v["cust"]),
+         "call_cnt": call_by_day.get(d, 0)}
+        for d, v in by_day.items()
+    ]
+
+    return {
+        "scope": scope,
+        "channel": channel,
+        "days": days,
+        "cards": cards,
+        "trend": trend,
+        "anomaly": await anomaly(session, channel),
+    }
diff --git a/yunke-server/tests/test_analytics_overview.py b/yunke-server/tests/test_analytics_overview.py
new file mode 100644
index 0000000..41b3608
--- /dev/null
+++ b/yunke-server/tests/test_analytics_overview.py
@@ -0,0 +1,91 @@
+"""A1 总览指标:卡片/首沟通口径/环比(仅周月)/异常警示。"""
+from __future__ import annotations
+
+from app.analytics import metrics
+from app.db.models import (
+    MsgDailyStats,
+    PhoneCall,
+    StatDailyStaff,
+    WechatAccount,
+)
+
+_TODAY = 20260904  # 测试统一用固定 day 键,monkeypatch today_key
+
+
+async def _seed(session):
+    session.add(WechatAccount(wx_id="wx1", user_id="u1", user_name="张三"))
+    # 昨日(20260903):u1 90 条;前 7 日均值(20260827-0902):每天 200 → 偏离 -55%>50% 触发
+    # (阈值是严格 >0.5——正好 -50% 不触发,seed 用 90)
+    for day, sent in [(20260827, 200), (20260828, 200), (20260829, 200),
+                      (20260830, 200), (20260831, 200), (20260901, 200),
+                      (20260902, 200), (20260903, 90)]:
+        session.add(StatDailyStaff(day=day, channel="wechat", user_id="u1",
+                                   msg_sent=sent, msg_recv=0,
+                                   active_friends=5, active_rooms=1))
+    # 当日 rollup 行(active_staff 卡片读 stat_daily_staff,必须有当日行)
+    session.add(StatDailyStaff(day=20260904, channel="wechat", user_id="u1",
+                               msg_sent=15, msg_recv=7,
+                               active_friends=1, active_rooms=1))
+    # 当日 + 首沟通:t1 当日首现(首沟通=1),t2 早在 20260827 就有(不算)
+    session.add(MsgDailyStats(channel="wechat", owner_account_id="wx1",
+                              peer_kind="friend", peer_id="t1", day=20260904,
+                              send_cnt=10, recv_cnt=5, last_ts=1788500000000,
+                              last_is_send=True))
+    session.add(MsgDailyStats(channel="wechat", owner_account_id="wx1",
+                              peer_kind="friend", peer_id="t2", day=20260827,
+                              send_cnt=3, recv_cnt=0, last_ts=1787800000000,
+                              last_is_send=True))
+    session.add(MsgDailyStats(channel="wechat", owner_account_id="wx1",
+                              peer_kind="room", peer_id="r1", day=20260904,
+                              send_cnt=7, recv_cnt=0, last_ts=1788500000000,
+                              last_is_send=True))
+    # 通话时间戳必须是 2026-09-04 当日(1756950000000 是 2025 年——坑)
+    session.add(PhoneCall(call_id="c1", channel="voice_call",
+                          start_call_time=1788500000000, call_duration=60))
+    await session.commit()
+
+
+async def test_overview_today(make_client, monkeypatch):
+    monkeypatch.setattr(metrics, "today_key", lambda: _TODAY)
+    async def seed(session):
+        await _seed(session)
+        out = await metrics.overview(session, channel="wechat", scope="today")
+        assert out["cards"]["msg_total"] == 22  # (10+5)+(7+0)
+        assert out["cards"]["active_customers"] == 1  # peer_kind=friend 去重,群不计
+        assert out["cards"]["active_staff"] == 1
+        assert out["cards"]["call_cnt"] == 1
+        assert out["cards"]["first_contact"] == 1  # t1 全史 MIN(day)=今日;t2 不是
+        assert out["cards"].get("mom_total_delta") is None  # 今日无环比
+
+    await make_client(seed)
+
+
+async def test_anomaly_yesterday_vs_prev7(make_client, monkeypatch):
+    monkeypatch.setattr(metrics, "today_key", lambda: _TODAY)
+    async def seed(session):
+        await _seed(session)
+        a = await metrics.anomaly(session, channel="wechat")
+        assert a is not None
+        assert a["total_delta_pct"] <= -0.5  # 90 vs 均值 200 = -55%(严格 >50% 触发)
+        staff = {s["user_id"]: s for s in a["staff"]}
+        assert staff["u1"]["yesterday"] == 90
+        assert staff["u1"]["prev7_mean"] == 200.0
+
+    await make_client(seed)
+
+
+async def test_overview_fallback_when_rollup_empty(make_client, monkeypatch):
+    """stat_daily_staff 空表 → 员工卡片回退实时聚合 msg_daily_stats(部署即用)。"""
+    monkeypatch.setattr(metrics, "today_key", lambda: _TODAY)
+    async def seed(session):
+        session.add(WechatAccount(wx_id="wx1", user_id="u1"))
+        session.add(MsgDailyStats(channel="wechat", owner_account_id="wx1",
+                                  peer_kind="friend", peer_id="t1", day=20260904,
+                                  send_cnt=2, recv_cnt=1, last_ts=1788500000000,
+                                  last_is_send=True))
+        await session.commit()
+        out = await metrics.overview(session, channel="wechat", scope="today")
+        assert out["cards"]["active_staff"] == 1
+        assert out["cards"]["msg_total"] == 3
+
+    await make_client(seed)