diff --git a/src/pages/checkin/CheckinPage.jsx b/src/pages/checkin/CheckinPage.jsx
index 8287c17..5c828eb 100644
--- a/src/pages/checkin/CheckinPage.jsx
+++ b/src/pages/checkin/CheckinPage.jsx
@@ -1,20 +1,19 @@
 import { useState } from 'react'
 import PageHeader from '../../components/PageHeader.jsx'
 import SwipeTabs from '../../components/SwipeTabs.jsx'
-import HabitView from './HabitView.jsx'
-import CalendarView from './CalendarView.jsx'
+import MergedView from './MergedView.jsx'
 import ListView from './ListView.jsx'
 import { toDateStr } from './date.js'
 
-// 打卡页: 三个视图 —— 打卡(环形进度) / 日历(今天·昨天·明天) / 清单(检查清单 + 模板)
-// 注: 打卡与日历的合并视图正在设计确认中, 确认后此处收敛为 日历(含打卡) / 清单 两个视图
+// 打卡页: 两个视图 —— 日历(含打卡) / 清单
+// V0.2.1 界面调整 (设计文档 §11.5): 原「打卡」与「日历」两个 tab 合并为一个视图,
+// 上日历下打卡、按 每天/每周/每月 分组、去掉「昨天今天明天」分段.
 export default function CheckinPage() {
-  const [active, setActive] = useState('habit')
+  const [active, setActive] = useState('calendar')
   const [date, setDate] = useState(() => toDateStr())
 
   const tabs = [
-    { key: 'habit', label: '打卡', render: () => <HabitView date={date} /> },
-    { key: 'calendar', label: '日历', render: () => <CalendarView date={date} onDateChange={setDate} /> },
+    { key: 'calendar', label: '打卡', render: () => <MergedView date={date} onDateChange={setDate} /> },
     { key: 'list', label: '清单', render: () => <ListView /> },
   ]
 
diff --git a/src/pages/checkin/MergedView.jsx b/src/pages/checkin/MergedView.jsx
new file mode 100644
index 0000000..3833b1d
--- /dev/null
+++ b/src/pages/checkin/MergedView.jsx
@@ -0,0 +1,415 @@
+// 打卡 · 日历与打卡合并视图 (V0.2.1 界面调整, 设计文档 §11.5)
+//   - 上: 月历 (月份切换 + 回到今天), 去掉「昨天/今天/明天」分段
+//   - 下: 当日打卡项, 按 每天 / 每周 / 每月 分组 (去掉「每年」分组)
+//   - 卡片紧凑化: 内边距 8px, 环形 42px/环宽 5, 间距 7px
+//   - 撤销 / 编辑 / 归档 收进「⋯」底部面板
+//   - 未来日期只读, 按钮灰显「计划」
+import { useCallback, useEffect, useMemo, useState } from 'react'
+import {
+  Button, Dialog, DotLoading, Empty, Input, Popup, Selector, Stepper, Toast,
+} from 'antd-mobile'
+import RingProgress, { Celebrate } from '../../components/RingProgress.jsx'
+import { checkinApi } from '../../api/checkin.js'
+import useRefreshOnVisible from '../../hooks/useRefreshOnVisible.js'
+import {
+  toDateStr, addDays, addMonths, monthGrid, weekdayLabels, dayLabel, fmtMonth,
+} from './date.js'
+
+// 分组顺序: 每天 → 每周 → 每月 (去掉每年)
+const GROUP_ORDER = ['day', 'week', 'month']
+const GROUP_LABEL = { day: '每天', week: '每周', month: '每月' }
+
+const PERIOD_OPTIONS = [
+  { label: '每天', value: 'day' },
+  { label: '每周', value: 'week' },
+  { label: '每月', value: 'month' },
+  { label: '每年', value: 'year' },
+]
+
+const COLORS = ['#1677ff', '#00b578', '#ff8f1f', '#ff3141', '#a855f7', '#14b8a6', '#f43f9e']
+const EMPTY_FORM = { id: null, name: '', period: 'day', target: 1, color: COLORS[0], note: '' }
+
+export default function MergedView({ date, onDateChange }) {
+  const today = toDateStr()
+  const [month, setMonth] = useState(() => date.slice(0, 7))
+  const [cal, setCal] = useState(null)       // 月历数据 { days, rate }
+  const [detail, setDetail] = useState(null) // 选中日详情 { today, date, items, summary, isFuture }
+  const [err, setErr] = useState('')
+  const [bursts, setBursts] = useState({})
+  const [sheetItem, setSheetItem] = useState(null) // 「⋯」面板对应的打卡项
+  const [form, setForm] = useState(EMPTY_FORM)
+  const [showForm, setShowForm] = useState(false)
+
+  // ---------- 数据加载 ----------
+  const loadCal = useCallback((silent) => {
+    if (!silent) setErr('')
+    checkinApi.calendar(month)
+      .then(setCal)
+      .catch((e) => { if (!silent) setErr(e.message) })
+  }, [month])
+
+  const loadDetail = useCallback((silent) => {
+    if (!silent) setErr('')
+    checkinApi.habits(date)
+      .then(setDetail)
+      .catch((e) => { if (!silent) setErr(e.message) })
+  }, [date])
+
+  useEffect(() => { loadCal(false) }, [loadCal])
+  useEffect(() => { setDetail(null); loadDetail(false) }, [loadDetail])
+  useRefreshOnVisible(() => { loadCal(true); loadDetail(true) })
+
+  // 切换日期时若跨月, 同步月份
+  useEffect(() => {
+    const m = date.slice(0, 7)
+    setMonth((cur) => (cur === m ? cur : m))
+  }, [date])
+
+  const days = useMemo(() => monthGrid(month), [month])
+  const byDate = useMemo(() => {
+    const map = new Map()
+    ;(cal?.days || []).forEach((d) => map.set(d.date, d))
+    return map
+  }, [cal])
+
+  const items = detail?.items || []
+  const isFuture = !!detail?.isFuture
+
+  // 按周期分组: 每天 → 每周 → 每月. "每年" 不在合并视图中展示, 但若存在
+  // 历史 year 项则归入"每月"之外的单列, 避免数据凭空消失.
+  const groups = useMemo(() => {
+    const bucket = new Map()
+    for (const it of items) {
+      const key = GROUP_ORDER.includes(it.period) ? it.period : 'other'
+      if (!bucket.has(key)) bucket.set(key, [])
+      bucket.get(key).push(it)
+    }
+    // 组内排序: 未完成在前, 已完成在后 (沿用 F-CK-16 默认口径)
+    for (const arr of bucket.values()) {
+      arr.sort((a, b) => Number(a.completed) - Number(b.completed) || a.id - b.id)
+    }
+    const order = [...GROUP_ORDER, 'other']
+    return order.filter((k) => bucket.has(k)).map((k) => ({
+      key: k,
+      label: GROUP_LABEL[k] || '其它周期',
+      items: bucket.get(k),
+    }))
+  }, [items])
+
+  const summary = detail?.summary || { total: 0, done: 0 }
+  const fireBurst = (id) => setBursts((m) => ({ ...m, [id]: (m[id] || 0) + 1 }))
+
+  // ---------- 打卡 / 撤销 (乐观更新) ----------
+  async function doCheck(item) {
+    if (!item.canCheck || isFuture) return
+    const before = detail
+    setDetail((d) => ({
+      ...d,
+      items: d.items.map((x) => {
+        if (x.id !== item.id) return x
+        const done = x.done + 1
+        const countOnDate = (x.countOnDate || 0) + 1
+        return {
+          ...x,
+          done,
+          remaining: Math.max(0, x.target - done),
+          percent: Math.min(1, done / x.target),
+          completed: done >= x.target,
+          over: Math.max(0, done - x.target),
+          countOnDate,
+          dayDone: countOnDate >= x.expectedPerDay,
+        }
+      }),
+    }))
+    try {
+      const res = await checkinApi.check(item.id, date)
+      const fresh = await checkinApi.habits(date)
+      setDetail(fresh)
+      if (res.item?.completed) fireBurst(item.id)
+      loadCal(true)
+    } catch (e) {
+      setDetail(before)
+      Toast.show({ content: e.message || '打卡失败' })
+    }
+  }
+
+  async function doUncheck(item) {
+    const before = detail
+    setDetail((d) => ({
+      ...d,
+      items: d.items.map((x) => {
+        if (x.id !== item.id) return x
+        const done = Math.max(0, x.done - 1)
+        const countOnDate = Math.max(0, (x.countOnDate || 0) - 1)
+        return {
+          ...x,
+          done,
+          remaining: Math.max(0, x.target - done),
+          percent: Math.min(1, done / x.target),
+          completed: done >= x.target,
+          over: Math.max(0, done - x.target),
+          countOnDate,
+          dayDone: countOnDate >= x.expectedPerDay,
+        }
+      }),
+    }))
+    try {
+      await checkinApi.uncheck(item.id, date)
+      const fresh = await checkinApi.habits(date)
+      setDetail(fresh)
+      loadCal(true)
+    } catch (e) {
+      setDetail(before)
+      Toast.show({ content: e.message || '撤销失败' })
+    }
+  }
+
+  // ---------- 新建 / 编辑 / 归档 ----------
+  function openCreate() {
+    setForm(EMPTY_FORM)
+    setShowForm(true)
+  }
+
+  function openEdit(item) {
+    setSheetItem(null)
+    setForm({ id: item.id, name: item.name, period: item.period, target: item.target, color: item.color, note: item.note })
+    setShowForm(true)
+  }
+
+  async function submitForm() {
+    const name = String(form.name || '').trim()
+    if (!name) return Toast.show({ content: '请填写名称' })
+    if (name.length > 20) return Toast.show({ content: '名称不能超过 20 个字' })
+    const payload = { name, period: form.period, target: Number(form.target) || 1, color: form.color, note: form.note }
+    try {
+      if (form.id) await checkinApi.updateHabit(form.id, payload)
+      else await checkinApi.createHabit(payload)
+      setShowForm(false)
+      setForm(EMPTY_FORM)
+      loadDetail(true)
+      loadCal(true)
+    } catch (e) {
+      Toast.show({ content: e.message || '保存失败' })
+    }
+  }
+
+  async function doArchive(item) {
+    setSheetItem(null)
+    const ok = await Dialog.confirm({
+      content: `归档「${item.name}」？归档后不再出现在待办，历史记录保留。`,
+      confirmText: '归档',
+      cancelText: '取消',
+    })
+    if (!ok) return
+    try {
+      await checkinApi.deleteHabit(item.id)
+      Toast.show({ content: '已归档' })
+      loadDetail(true)
+      loadCal(true)
+    } catch (e) {
+      Toast.show({ content: e.message || '操作失败' })
+    }
+  }
+
+  // ---------- 渲染 ----------
+  return (
+    <div className="mv-view">
+      {/* 月历 */}
+      <div className="mv-cal">
+        <div className="mv-month">
+          <span className="arrow" onClick={() => setMonth((m) => addMonths(m, -1))}>‹</span>
+          <b>{fmtMonth(month)}</b>
+          <span className="arrow" onClick={() => setMonth((m) => addMonths(m, 1))}>›</span>
+          <span className="today" onClick={() => onDateChange(today)}>回到今天</span>
+        </div>
+
+        <div className="mv-grid mv-wd">
+          {weekdayLabels().map((w) => <span key={w}>{w}</span>)}
+        </div>
+        <div className="mv-grid">
+          {days.map((d) => {
+            const info = byDate.get(d)
+            const inMonth = d.slice(0, 7) === month
+            const status = info?.status || 'empty'
+            return (
+              <div
+                key={d}
+                className={
+                  'mv-day' + (inMonth ? '' : ' out') + (d === date ? ' sel' : '') +
+                  (info?.isToday ? ' today' : '') + (info?.isFuture ? ' future' : '')
+                }
+                onClick={() => onDateChange(d)}
+              >
+                <span>{Number(d.slice(8, 10))}</span>
+                {inMonth && status !== 'empty' && <i className={status} />}
+              </div>
+            )
+          })}
+        </div>
+
+        {cal && (
+          <div className="mv-rate">
+            <span>本月完成率</span>
+            <b>{Math.round((cal.rate || 0) * 100)}%</b>
+          </div>
+        )}
+      </div>
+
+      {err && <div className="error-banner">{err}<span className="retry-link" onClick={() => { loadCal(false); loadDetail(false) }}>重试</span></div>}
+
+      {/* 当日栏 */}
+      <div className="mv-daybar">
+        {dayLabel(date, detail?.today || today)}
+        {isFuture
+          ? <span className="badge">计划（不可打卡）</span>
+          : <span className="badge">已完成 {summary.done} / {summary.total}</span>}
+        <span className="sum">点环即打卡</span>
+      </div>
+
+      {detail === null && !err && <div className="monitor-loading"><DotLoading /> 加载中...</div>}
+
+      {detail !== null && items.length === 0 && (
+        <div className="checkin-empty">
+          <Empty description="当天没有打卡项" />
+          <Button color="primary" size="small" onClick={openCreate}>创建第一个打卡项</Button>
+        </div>
+      )}
+
+      {/* 分组列表 */}
+      <div className="mv-groups">
+        {groups.map((g) => (
+          <div key={g.key}>
+            <div className="mv-ghead">{g.label}<span className="cnt">{g.items.length} 项</span></div>
+            {g.items.map((item) => (
+              <div key={item.id} className={'mv-card' + (item.completed ? ' done' : '')}>
+                <RingProgress
+                  size={42}
+                  stroke={5}
+                  percent={item.percent}
+                  done={item.done}
+                  target={item.target}
+                  over={item.over}
+                  completed={item.completed}
+                  color={item.color}
+                  onClick={() => doCheck(item)}
+                />
+                <div className="mv-main">
+                  <div className="mv-name">{item.name}</div>
+                  <div className="mv-meta">
+                    {item.periodLabel} {item.target} 次 · 当日 {item.countOnDate || 0}/{item.expectedPerDay}
+                    {item.streak > 0 && <span className="st">连续 {item.streak}</span>}
+                  </div>
+                </div>
+                {isFuture ? (
+                  <div className="mv-btn grey">计划</div>
+                ) : (
+                  <div
+                    className={'mv-btn' + (item.completed ? ' grey' : '')}
+                    onClick={() => doCheck(item)}
+                  >
+                    {item.completed ? '再打一次' : '打卡'}
+                  </div>
+                )}
+                <div className="mv-more" onClick={() => setSheetItem(item)}>⋯</div>
+                <Celebrate fire={bursts[item.id] || 0} color={item.color} />
+              </div>
+            ))}
+          </div>
+        ))}
+      </div>
+
+      {detail !== null && (
+        <div className="mv-add-wrap">
+          <Button block fill="outline" size="small" onClick={openCreate} style={{ margin: '4px 12px 12px' }}>
+            + 新建打卡项
+          </Button>
+        </div>
+      )}
+
+      {/* 「⋯」操作面板: 撤销 / 编辑 / 归档 */}
+      <Popup
+        visible={!!sheetItem}
+        onMaskClick={() => setSheetItem(null)}
+        bodyStyle={{ borderTopLeftRadius: 12, borderTopRightRadius: 12, paddingBottom: 16 }}
+      >
+        {sheetItem && (
+          <div className="mv-sheet">
+            <div className="sheet-title">{sheetItem.name}</div>
+            <div
+              className={'mv-sheet-row' + (sheetItem.done > 0 ? '' : ' disabled')}
+              onClick={() => { if (sheetItem.done > 0) { doUncheck(sheetItem); setSheetItem(null) } }}
+            >
+              <span>撤销上次打卡</span>
+              <span className="k">今日 {sheetItem.countOnDate || 0} 次</span>
+            </div>
+            <div className="mv-sheet-row" onClick={() => openEdit(sheetItem)}>
+              <span>编辑打卡项</span>
+              <span className="k">名称 / 周期 / 目标</span>
+            </div>
+            <div className="mv-sheet-row danger" onClick={() => doArchive(sheetItem)}>
+              <span>归档</span>
+              <span className="k">历史记录保留</span>
+            </div>
+          </div>
+        )}
+      </Popup>
+
+      {/* 新建 / 编辑表单 */}
+      <Popup
+        visible={showForm}
+        onMaskClick={() => setShowForm(false)}
+        bodyStyle={{ borderTopLeftRadius: 12, borderTopRightRadius: 12, paddingBottom: 16 }}
+      >
+        <div className="form-popup">
+          <div className="form-title">{form.id ? '编辑打卡项' : '新建打卡项'}</div>
+          <div className="form-field">
+            <label>名称</label>
+            <Input
+              placeholder="例如：喝水 / 健身 / 读书"
+              value={form.name}
+              maxLength={20}
+              onChange={(v) => setForm((f) => ({ ...f, name: v }))}
+            />
+          </div>
+          <div className="form-field">
+            <label>周期</label>
+            <Selector
+              options={PERIOD_OPTIONS}
+              value={[form.period]}
+              onChange={(v) => setForm((f) => ({ ...f, period: v[0] }))}
+            />
+          </div>
+          <div className="form-field">
+            <label>目标次数（周期内）</label>
+            <Stepper min={1} max={999} value={form.target} onChange={(v) => setForm((f) => ({ ...f, target: v }))} />
+          </div>
+          <div className="form-field">
+            <label>颜色</label>
+            <div className="color-row">
+              {COLORS.map((c) => (
+                <span
+                  key={c}
+                  className={'color-dot' + (form.color === c ? ' active' : '')}
+                  style={{ background: c }}
+                  onClick={() => setForm((f) => ({ ...f, color: c }))}
+                />
+              ))}
+            </div>
+          </div>
+          <div className="form-field">
+            <label>备注（可选）</label>
+            <Input
+              placeholder="补充说明"
+              value={form.note}
+              onChange={(v) => setForm((f) => ({ ...f, note: v }))}
+            />
+          </div>
+          <div className="form-actions">
+            <Button block color="primary" onClick={submitForm}>保存</Button>
+            <Button block fill="outline" onClick={() => setShowForm(false)} style={{ marginTop: 8 }}>取消</Button>
+          </div>
+        </div>
+      </Popup>
+    </div>
+  )
+}
diff --git a/src/styles/globals.css b/src/styles/globals.css
index 79627a1..3792110 100644
--- a/src/styles/globals.css
+++ b/src/styles/globals.css
@@ -814,3 +814,72 @@ body.me-safe-top .app-safe-top { height: 0; }
   border: 2px solid transparent; transition: transform 0.15s ease;
 }
 .color-dot.active { border-color: rgba(0,0,0,.25); transform: scale(1.12); }
+
+/* ================== 打卡 · 日历与打卡合并视图 (V0.2.1, 设计文档 §11.5) ================== */
+/* 上: 月历; 下: 当日打卡项, 按 每天/每周/每月 分组. 卡片紧凑化. */
+.mv-view { display: flex; flex-direction: column; min-height: 0; }
+
+/* ---- 月历 ---- */
+.mv-cal { background: #fff; border-radius: 10px; margin: 8px 12px 0; padding: 6px 6px 8px; box-shadow: 0 1px 2px rgba(0,0,0,.04); }
+.mv-month { display: flex; align-items: center; gap: 8px; padding: 2px 4px 6px; }
+.mv-month b { font-size: 14px; }
+.mv-month .arrow { font-size: 17px; color: var(--color-muted); line-height: 1; padding: 0 3px; cursor: pointer; }
+.mv-month .today { margin-left: auto; font-size: 11px; color: var(--color-primary); cursor: pointer; }
+.mv-grid { display: grid; grid-template-columns: repeat(7, 1fr); }
+.mv-wd span { text-align: center; font-size: 10px; color: var(--color-muted); padding: 1px 0 3px; display: block; }
+.mv-day {
+  height: 31px; margin: 1px 0; display: flex; flex-direction: column;
+  align-items: center; justify-content: center; border-radius: 6px;
+  font-size: 12px; line-height: 1.15; color: var(--color-text); cursor: pointer;
+}
+.mv-day.out { color: #c8c8c8; }
+.mv-day.future { color: #b0b0b0; }
+.mv-day.today { color: var(--color-primary); font-weight: 700; }
+.mv-day.sel { background: var(--color-primary); color: #fff; font-weight: 600; }
+.mv-day i { width: 4px; height: 4px; border-radius: 50%; margin-top: 2px; }
+.mv-day i.partial { background: #ff8f1f; }
+.mv-day i.full { background: #00b578; }
+.mv-day i.over { background: #ff6b6b; }
+.mv-day.sel i { background: #fff; }
+.mv-rate { display: flex; justify-content: space-between; align-items: center; font-size: 11px; color: var(--color-muted); padding: 7px 6px 0; }
+.mv-rate b { color: var(--color-primary); }
+
+/* ---- 当日栏 ---- */
+.mv-daybar { display: flex; align-items: center; gap: 8px; padding: 10px 14px 2px; font-size: 13px; font-weight: 600; }
+.mv-daybar .badge { font-weight: 400; color: var(--color-muted); font-size: 11px; }
+.mv-daybar .sum { margin-left: auto; font-size: 11px; color: var(--color-muted); font-weight: 400; }
+
+/* ---- 分组 ---- */
+.mv-groups { padding-bottom: 4px; }
+.mv-ghead { display: flex; align-items: center; gap: 6px; padding: 9px 14px 5px; font-size: 11px; font-weight: 600; color: var(--color-muted); }
+.mv-ghead::before { content: ""; width: 3px; height: 11px; border-radius: 2px; background: var(--color-primary); }
+.mv-ghead .cnt { margin-left: auto; font-weight: 400; color: #b8bcc4; }
+
+/* ---- 紧凑卡片 ---- */
+.mv-card {
+  position: relative; display: flex; align-items: center; gap: 9px; background: #fff;
+  border-radius: 9px; padding: 8px 10px; margin: 0 12px 7px; box-shadow: 0 1px 2px rgba(0,0,0,.04);
+}
+.mv-card.done { background: #f7fbf8; }
+.mv-main { flex: 1; min-width: 0; }
+.mv-name { font-size: 14px; font-weight: 600; line-height: 1.25; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
+.mv-meta { font-size: 10px; color: var(--color-muted); margin-top: 2px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
+.mv-meta .st { color: #ff8f1f; background: rgba(255,143,31,.12); border-radius: 3px; padding: 0 4px; margin-left: 5px; }
+.mv-btn {
+  font-size: 11px; border-radius: 999px; padding: 4px 12px; background: var(--color-primary);
+  color: #fff; flex-shrink: 0; white-space: nowrap; cursor: pointer;
+}
+.mv-btn.grey { background: #f2f3f5; color: var(--color-muted); }
+.mv-more { color: #c0c4cc; font-size: 15px; line-height: 1; padding: 4px 2px 4px 6px; flex-shrink: 0; cursor: pointer; }
+.mv-add-wrap { margin-top: 2px; }
+
+/* ---- 「⋯」操作面板 ---- */
+.mv-sheet { padding: 16px 16px 4px; }
+.mv-sheet .sheet-title { font-size: 15px; font-weight: 600; margin-bottom: 8px; }
+.mv-sheet-row {
+  display: flex; align-items: center; justify-content: space-between;
+  padding: 12px 4px; border-top: 1px solid var(--color-border); font-size: 14px; cursor: pointer;
+}
+.mv-sheet-row.danger { color: var(--color-danger); }
+.mv-sheet-row.disabled { opacity: .45; cursor: default; }
+.mv-sheet-row .k { font-size: 11px; color: #b8bcc4; }