diff --git a/apps/web/CLAUDE.md b/apps/web/CLAUDE.md
index c5d47f5..4dcef82 100644
--- a/apps/web/CLAUDE.md
+++ b/apps/web/CLAUDE.md
@@ -59,7 +59,7 @@ API 调用不按模块分：学生端全在 `oj/api.ts`、后台全在 `admin/ap
 
 Shared logic lives in `shared/`:
 - `store/` — Pinia stores: `user` (auth/roles), `config` (site-wide settings), `authModal` (login/signup form state), `collab` (help-request queue + collab room), `achievement` (解锁弹窗队列), `myFlowchart` (题面「你画的流程图」那张 A/S 图的 mermaid 源码)
-- `composables/` — `aiStream`, `pagination` (URL-synced), `websocket` (reconnect + heartbeat), `collabDoc` (Yjs binding for the collab channel), `configUpdate` (WS-pushed config sync), `useMermaid` (lazy Mermaid render), `darkTransition` (View Transitions，111 以下走降级分支), `leaveStudents` (课堂看板的「请假」), `chartTheme`, `breakpoints`, `maxkb`, `learnProgress`, `rarity`
+- `composables/` — `aiStream`, `pagination` (URL-synced), `websocket` (reconnect + heartbeat), `collabDoc` (Yjs binding for the collab channel), `configUpdate` (WS-pushed config sync), `useMermaid` (lazy Mermaid render), `darkTransition` (View Transitions，111 以下走降级分支), `leaveStudents` (课堂看板的「请假」), `chartTheme`, `breakpoints`, `maxkb`, `rarity`
 - `layout/` — `default.vue` and `admin.vue` layout wrappers
 - `api.ts` — shared API calls (auth, profile, tags, captcha)
 
diff --git a/apps/web/src/admin/api.ts b/apps/web/src/admin/api.ts
index 0ed99a4..db949aa 100644
--- a/apps/web/src/admin/api.ts
+++ b/apps/web/src/admin/api.ts
@@ -9,8 +9,7 @@ import type {
   AdminAiReport,
   AdminAiReportList,
   StuckProblem,
-  LearnStudentProgressList,
-  LearnTutorialProgressList,
+  LearnBoard,
   LearnExerciseProgressList,
   LearnExerciseAttempt,
   AdminContestList,
@@ -41,9 +40,11 @@ import type {
   AdminProblemSetProblem,
   AddProblemsToSetResult,
   TutorialListItem,
+  TutorialEdit,
   TagCategory,
 } from "utils/types"
 import type {
+  TutorialProblemCandidate,
   AstCheckRequest,
   AstCheckResponse,
   GenerateTestInputsRequest,
@@ -416,25 +417,44 @@ export function getTutorial(id: number) {
   return api.get<Tutorial>(`admin/tutorials/${id}`)
 }
 
-function toTutorialBody(data: Partial<Tutorial>) {
+/** 「示例代码」界面上去掉了，`code` 不带：后端照原样留着发布脚本写进去的那份 */
+function toTutorialBody(data: TutorialEdit) {
   return {
     title: data.title,
     content: data.content,
-    code: data.code ?? null,
-    isPublic: data.isPublic ?? false,
-    order: data.order ?? 0,
+    project: data.project,
+    isPublic: data.isPublic,
+    order: data.order,
     type: data.type,
   }
 }
 
-export function createTutorial(data: Partial<Tutorial>) {
+export function createTutorial(data: TutorialEdit) {
   return api.post<Tutorial>("admin/tutorials", toTutorialBody(data))
 }
 
-export function updateTutorial(data: Partial<Tutorial>) {
+export function updateTutorial(data: TutorialEdit) {
   return api.put<Tutorial>(`admin/tutorials/${data.id}`, toTutorialBody(data))
 }
 
+export function setTutorialProblems(id: number, problemIds: number[]) {
+  return api.put<Tutorial>(`admin/tutorials/${id}/problems`, { problemIds })
+}
+
+export function getTutorialProblemCandidates(keyword: string) {
+  return api.get<TutorialProblemCandidate[]>("admin/tutorial-problem-candidates", {
+    params: keyword ? { keyword } : {},
+  })
+}
+
+export function reorderTutorials(ids: number[]) {
+  return api.put<null>("admin/tutorial-order", { ids })
+}
+
+export function renameTutorialProject(type: "python" | "c", from: string, to: string) {
+  return api.put<null>("admin/tutorial-projects", { type, from, to })
+}
+
 export function deleteTutorial(id: number) {
   return api.delete(`admin/tutorials/${id}`)
 }
@@ -583,16 +603,8 @@ export function getStuckProblems() {
   return api.get<StuckProblem[]>("admin/problem-analytics/stuck")
 }
 
-export function getLearnStudents(params: { type: "python" | "c"; className?: string }) {
-  return api.get<LearnStudentProgressList>("admin/learn-analytics/students", {
-    params,
-  })
-}
-
-export function getLearnTutorials(params: { type: "python" | "c"; className?: string }) {
-  return api.get<LearnTutorialProgressList>("admin/learn-analytics/tutorials", {
-    params,
-  })
+export function getLearnBoard(params: { type: "python" | "c"; className?: string }) {
+  return api.get<LearnBoard>("admin/learn-analytics/board", { params })
 }
 
 export function getLearnExercises(params: { type: "python" | "c"; className?: string }) {
diff --git a/apps/web/src/admin/learn/index.vue b/apps/web/src/admin/learn/index.vue
index 2049f6e..7a43c7a 100644
--- a/apps/web/src/admin/learn/index.vue
+++ b/apps/web/src/admin/learn/index.vue
@@ -1,17 +1,25 @@
 <script setup lang="ts">
-import PageHeader from "admin/components/PageHeader.vue"
-import { TUTORIAL_READ_SECONDS } from "@oj2/contract"
-import { NProgress, NTag, NText } from "naive-ui"
-import { getLearnStudents, getLearnTutorials, getLearnExercises } from "admin/api"
-import { readableDuration, parseTime } from "utils/functions"
-import type {
-  LearnStudentProgress,
-  LearnTutorialProgress,
-  LearnExerciseProgress,
-} from "utils/types"
+import { Icon } from "@iconify/vue"
+import type { LearnBoard, LearnBoardStudent, LearnExerciseProgress } from "utils/types"
+import { getLearnBoard, getLearnExercises } from "admin/api"
+import { parseTime, readableDuration } from "utils/functions"
+import { useConfigStore } from "shared/store/config"
+import UserName from "shared/components/UserName.vue"
+import { groupClassOptions } from "oj/submission/utils"
+import { groupByProject, splitTitle, type TutorialType } from "oj/learn/lesson"
+import "oj/learn/learn.css"
 import ExerciseAttempts from "./ExerciseAttempts.vue"
 
-const EXERCISE_TYPE_LABEL: Record<string, string> = {
+/**
+ * 自学情况（设计稿「后台 · 自学情况」）：一个班学到哪了。
+ *
+ * 中间是学生 × 课的方块格（浅绿 = 打开过，绿 = 学完，也就是练一练全对），一课没打开过的
+ * 学生收成一串名单；右边按课看练一练做对了多少，点一道看每个人最后错在哪。
+ * 不选班就按排名页同一套规则猜老师在教哪个班。
+ */
+const configStore = useConfigStore()
+
+const KIND: Record<string, string> = {
   mcq: "选择",
   sort: "排序",
   fill: "填空",
@@ -21,458 +29,570 @@ const EXERCISE_TYPE_LABEL: Record<string, string> = {
   group: "分组",
 }
 
-const type = ref<"python" | "c">("python")
-// 3-4 位是具体班级，1-2 位当年级前缀（后端 classFilter 分的岔）
-const className = ref("")
-const tab = ref("students")
-// 按学生那张表的姓名/学号搜索，纯前端过滤（整表本来就一次拉完）
-const keyword = ref("")
-
-const loading = ref(false)
-const students = ref<LearnStudentProgress[]>([])
-const tutorials = ref<LearnTutorialProgress[]>([])
+const type = ref<TutorialType>("python")
+const className = ref<string | null>(null)
+const board = ref<LearnBoard | null>(null)
 const exercises = ref<LearnExerciseProgress[]>([])
-const tutorialCount = ref(0)
-const exerciseCount = ref(0)
-const studentCount = ref(0)
-// 展开明细的那一行；一次只展开一道题，免得几十个请求一起打出去
-const expanded = ref<number[]>([])
+const lessonId = ref<number | null>(null)
+const expanded = ref<number | null>(null)
+const loading = ref(false)
 
-const typeOptions = [
-  { label: "Python", value: "python" },
-  { label: "C 语言", value: "c" },
-]
-
-type StudentStatus = "idle" | "stalled" | "noPractice" | "going" | "done"
-
-const STALL_DAYS = 7
-const STATUS_META: Record<
-  StudentStatus,
-  { label: string; type: "default" | "error" | "warning" | "info" | "success" }
-> = {
-  idle: { label: "未开始", type: "error" },
-  stalled: { label: `${STALL_DAYS} 天没学`, type: "warning" },
-  noPractice: { label: "只读不练", type: "info" },
-  going: { label: "进行中", type: "default" },
-  done: { label: "已学完", type: "success" },
-}
-
-// 一个学生只落进一个状态，按「最需要老师看一眼」的顺序判：
-// 没开始 > 学完了 > 停滞 > 只读不练 > 正常推进
-function statusOf(row: LearnStudentProgress): StudentStatus {
-  if (row.readCount === 0 && row.totalSeconds === 0 && !row.exerciseTried) {
-    return "idle"
+const classOptions = computed(() => groupClassOptions(configStore.config?.classList ?? []))
+const groups = computed(() =>
+  groupByProject(
+    (board.value?.tutorials ?? []).map(({ id, title, project }) => ({ id, title, project })),
+  ),
+)
+const started = computed(() =>
+  (board.value?.students ?? [])
+    .filter((row) => row.opened.length || row.exerciseSolved)
+    .sort(
+      (a, b) =>
+        b.done.length - a.done.length ||
+        b.opened.length - a.opened.length ||
+        (b.lastViewedAt ?? "").localeCompare(a.lastViewedAt ?? ""),
+    ),
+)
+const idle = computed(() =>
+  (board.value?.students ?? []).filter((row) => !row.opened.length && !row.exerciseSolved),
+)
+const finishedOne = computed(() => started.value.filter((row) => row.done.length > 0).length)
+const avgSeconds = computed(() => {
+  const rows = started.value
+  return rows.length
+    ? Math.round(rows.reduce((n, row) => n + row.totalSeconds, 0) / rows.length)
+    : 0
+})
+const openedCount = computed(() => {
+  const counts = new Map<number, number>()
+  for (const row of board.value?.students ?? []) {
+    for (const id of row.opened) counts.set(id, (counts.get(id) ?? 0) + 1)
   }
-  if (tutorialCount.value && row.readCount >= tutorialCount.value) return "done"
-  if (row.lastViewedAt) {
-    // 只比两个时刻相差多少毫秒，不涉及「哪一天」，所以不必走 time.ts 的日历口径
-    const days = (Date.now() - Date.parse(row.lastViewedAt)) / 86_400_000
-    if (days > STALL_DAYS) return "stalled"
-  }
-  if (exerciseCount.value && row.readCount > 0 && row.exerciseTried === 0) {
-    return "noPractice"
-  }
-  return "going"
-}
-
-const statusFilter = ref<StudentStatus | "all">("all")
-
-const statusCounts = computed(() => {
-  const counts: Record<StudentStatus, number> = {
-    idle: 0,
-    stalled: 0,
-    noPractice: 0,
-    going: 0,
-    done: 0,
-  }
-  for (const row of students.value) counts[statusOf(row)]++
   return counts
 })
-
-const startedCount = computed(() => students.value.length - statusCounts.value.idle)
-
-const avgRead = computed(() =>
-  students.value.length
-    ? (students.value.reduce((n, row) => n + row.readCount, 0) / students.value.length).toFixed(1)
-    : "0",
+const maxOpened = computed(() => Math.max(1, ...openedCount.value.values()))
+const lessonOptions = computed(() =>
+  groups.value.flatMap((group) =>
+    group.lessons.map((lesson) => ({
+      label: `第 ${lesson.step} 课 ${splitTitle(lesson.title).kp}`,
+      value: lesson.id,
+    })),
+  ),
+)
+const lessonExercises = computed(() =>
+  exercises.value.filter((row) => row.tutorialId === lessonId.value),
 )
 
-// 全班做题的总体正确口径：做对的题数 / 做过的题数
-const solveRate = computed(() => {
-  const tried = students.value.reduce((n, row) => n + row.exerciseTried, 0)
-  const solved = students.value.reduce((n, row) => n + row.exerciseSolved, 0)
-  return tried ? Math.round((solved / tried) * 100) : null
-})
-
-function lastSeen(value: string | null) {
-  if (!value) return "-"
-  const days = Math.floor((Date.now() - Date.parse(value)) / 86_400_000)
-  const absolute = parseTime(value, "M月D日 HH:mm")
-  return days >= 1 ? `${absolute}（${days} 天前）` : absolute
+function cellOf(row: LearnBoardStudent, id: number) {
+  if (row.done.includes(id)) return "done"
+  if (row.opened.includes(id)) return "opened"
+  return ""
 }
 
-// 姓名和学号都已经在手里，不再打接口。学号是纯数字，姓名是中文，
-// 一个框同时匹配两列就够了 —— 老师要么记得学号要么记得名字
-const filteredStudents = computed(() => {
-  const value = keyword.value.trim().toLowerCase()
-  return students.value.filter(
-    (row) =>
-      (statusFilter.value === "all" || statusOf(row) === statusFilter.value) &&
-      (!value ||
-        row.username.toLowerCase().includes(value) ||
-        (row.realName ?? "").toLowerCase().includes(value)),
-  )
-})
+function cellTitle(row: LearnBoardStudent, step: number, title: string, id: number) {
+  const state = cellOf(row, id)
+  return `第 ${step} 课 ${splitTitle(title).kp}：${state === "done" ? "学完了" : state === "opened" ? "打开过" : "没打开"}`
+}
 
-const studentColumns = computed<DataTableColumn<LearnStudentProgress>[]>(() => [
-  { title: "班级", key: "className", width: 90, sorter: "default" },
-  { title: "学号", key: "username", width: 140 },
-  {
-    title: "姓名",
-    key: "realName",
-    width: 110,
-    render: (row) => row.realName || "-",
-  },
-  {
-    title: "状态",
-    key: "status",
-    width: 110,
-    render: (row) => {
-      const meta = STATUS_META[statusOf(row)]
-      return h(NTag, { size: "small", type: meta.type, bordered: false }, () => meta.label)
-    },
-  },
-  {
-    title: `已读（共 ${tutorialCount.value} 课）`,
-    key: "readCount",
-    width: 170,
-    sorter: "default",
-    // 默认把读得最少的排在最前面：这张表要回答的是「谁还没开始」，
-    // 按读得多的排在前面，需要盯的人全在最后一页
-    defaultSortOrder: "ascend",
-    render: (row) =>
-      h("div", { style: "display: flex; align-items: center; gap: 8px" }, [
-        h("span", `${row.readCount} / ${tutorialCount.value}`),
-        h(NProgress, {
-          type: "line",
-          percentage: tutorialCount.value
-            ? Math.round((row.readCount / tutorialCount.value) * 100)
-            : 0,
-          showIndicator: false,
-          status: row.readCount === 0 ? "error" : "success",
-          style: "width: 70px",
-        }),
-      ]),
-  },
-  {
-    title: `练一练（共 ${exerciseCount.value} 道）`,
-    key: "exerciseSolved",
-    width: 190,
-    sorter: "default",
-    render: (row) =>
-      h("div", { style: "display: flex; align-items: center; gap: 8px" }, [
-        h("span", `${row.exerciseSolved} / ${exerciseCount.value}`),
-        // 做过但没做对的题，和提交总次数，一起说明「他在硬啃还是没碰」
-        row.exerciseTried > row.exerciseSolved
-          ? h(
-              NText,
-              { depth: 3, style: "font-size: 12px" },
-              () => `错 ${row.exerciseTried - row.exerciseSolved} 道`,
-            )
-          : null,
-        row.exerciseAttempts
-          ? h(NText, { depth: 3, style: "font-size: 12px" }, () => `共 ${row.exerciseAttempts} 次`)
-          : null,
-      ]),
-  },
-  {
-    title: "累计时长",
-    key: "totalSeconds",
-    width: 130,
-    sorter: "default",
-    render: (row) => readableDuration(row.totalSeconds),
-  },
-  {
-    title: "最后学习",
-    key: "lastViewedAt",
-    width: 210,
-    sorter: "default",
-    render: (row) => lastSeen(row.lastViewedAt),
-  },
-])
-
-const tutorialColumns = computed<DataTableColumn<LearnTutorialProgress>[]>(() => [
-  {
-    title: "#",
-    key: "order",
-    width: 60,
-    render: (_, index) => index + 1,
-  },
-  { title: "课程", key: "title", minWidth: 200 },
-  {
-    title: `读过的人（共 ${studentCount.value} 人）`,
-    key: "readers",
-    width: 200,
-    sorter: "default",
-    render: (row) =>
-      h("div", { style: "display: flex; align-items: center; gap: 8px" }, [
-        h("span", `${row.readers} / ${studentCount.value}`),
-        h(NProgress, {
-          type: "line",
-          percentage: studentCount.value ? Math.round((row.readers / studentCount.value) * 100) : 0,
-          showIndicator: false,
-          status: row.readers === 0 ? "error" : "success",
-          style: "width: 70px",
-        }),
-      ]),
-  },
-  {
-    title: "人均时长",
-    key: "avgSeconds",
-    width: 130,
-    sorter: "default",
-    render: (row) => readableDuration(row.avgSeconds),
-  },
-  {
-    title: "累计时长",
-    key: "totalSeconds",
-    width: 130,
-    sorter: "default",
-    render: (row) => readableDuration(row.totalSeconds),
-  },
-])
-
-const exerciseColumns = computed<DataTableColumn<LearnExerciseProgress>[]>(() => [
-  {
-    type: "expand",
-    renderExpand: (row) =>
-      h(ExerciseAttempts, {
-        exerciseId: row.exerciseId,
-        className: className.value.trim(),
-      }),
-  },
-  {
-    title: "课",
-    key: "tutorialOrder",
-    width: 160,
-    ellipsis: { tooltip: true },
-    render: (row) => `${row.tutorialOrder}. ${row.tutorialTitle}`,
-  },
-  {
-    title: "题型",
-    key: "type",
-    width: 90,
-    render: (row) => EXERCISE_TYPE_LABEL[row.type] ?? row.type,
-  },
-  {
-    title: "题干",
-    key: "question",
-    minWidth: 220,
-    ellipsis: { tooltip: true },
-    render: (row) => row.question || "（无题干）",
-  },
-  {
-    // 试的人不少、却没人一次做对，或者一半以上的人没做对 —— 多半是题有坑，
-    // 老师应该先去看展开里全班「最后一次错在」是不是同一个干扰项
-    title: "提示",
-    key: "flag",
-    width: 100,
-    render: (row) => {
-      if (row.triedUsers < 3) return null
-      if (row.firstTryUsers === 0 && row.solvedUsers > 0) {
-        return h(NTag, { size: "small", type: "warning", bordered: false }, () => "没人一次对")
-      }
-      if (row.solvedUsers / row.triedUsers < 0.5) {
-        return h(NTag, { size: "small", type: "error", bordered: false }, () => "多数人卡住")
-      }
-      return null
-    },
-  },
-  {
-    title: "做对 / 做过",
-    key: "solvedUsers",
-    width: 150,
-    sorter: "default",
-    render: (row) =>
-      h("div", { style: "display: flex; align-items: center; gap: 8px" }, [
-        h("span", `${row.solvedUsers} / ${row.triedUsers}`),
-        h(NProgress, {
-          type: "line",
-          percentage: row.triedUsers ? Math.round((row.solvedUsers / row.triedUsers) * 100) : 0,
-          showIndicator: false,
-          status: row.triedUsers === 0 ? "error" : "success",
-          style: "width: 60px",
-        }),
-      ]),
-  },
-  {
-    title: "一次做对",
-    key: "firstTryUsers",
-    width: 110,
-    sorter: "default",
-    render: (row) => `${row.firstTryUsers} 人`,
-  },
-  {
-    // 做对的人平均试了几次。它和「一次做对」一起看才分得清难题和歧义题：
-    // 平均 3 次但没人一次对 → 题目本身有坑
-    title: "平均试几次",
-    key: "avgAttemptsToSolve",
-    width: 120,
-    sorter: "default",
-    defaultSortOrder: "descend",
-    render: (row) => (row.solvedUsers ? `${row.avgAttemptsToSolve} 次` : "-"),
-  },
-  {
-    title: "提交总次数",
-    key: "attempts",
-    width: 120,
-    sorter: "default",
-  },
-])
+function flag(row: LearnExerciseProgress) {
+  if (row.triedUsers < 3) return ""
+  if (row.firstTryUsers === 0 && row.solvedUsers > 0) return "没人一次对"
+  if (row.solvedUsers / row.triedUsers < 0.5) return "多数人卡住"
+  return ""
+}
 
 async function load() {
   loading.value = true
-  expanded.value = []
-  statusFilter.value = "all"
-  const params = { type: type.value, className: className.value.trim() }
+  expanded.value = null
   try {
-    // 三张表一起拉：切 tab 是纯前端的事，不该再等一次网络
-    const [studentRes, tutorialRes, exerciseRes] = await Promise.all([
-      getLearnStudents(params),
-      getLearnTutorials(params),
-      getLearnExercises(params),
-    ])
-    students.value = studentRes.results
-    tutorialCount.value = studentRes.tutorialCount
-    exerciseCount.value = studentRes.exerciseCount
-    tutorials.value = tutorialRes.results
-    studentCount.value = tutorialRes.studentCount
-    exercises.value = exerciseRes.results
+    const params = { type: type.value, ...(className.value ? { className: className.value } : {}) }
+    const data = await getLearnBoard(params)
+    board.value = data
+    className.value = data.className
+    const ex = data.className
+      ? await getLearnExercises({ type: type.value, className: data.className })
+      : { results: [] }
+    exercises.value = ex.results
+    // 练一练默认看大家打开得最多的那课
+    const busiest = [...openedCount.value.entries()].sort((a, b) => b[1] - a[1])[0]
+    lessonId.value = busiest?.[0] ?? data.tutorials[0]?.id ?? null
   } finally {
     loading.value = false
   }
 }
 
-watch(type, load)
+function pickType(value: TutorialType) {
+  type.value = value
+  load()
+}
+
+watch(className, (value, old) => {
+  if (old !== null && value !== old) load()
+})
 onMounted(load)
 </script>
 
 <template>
-  <!-- 口径写在表上方，免得老师对着「已读 0 课 / 累计 25 分钟」猜是不是坏了 -->
-  <PageHeader
-    title="自学情况"
-    :description="`「已读」按累计停留满 ${TUTORIAL_READ_SECONDS / 60} 分钟算，不足的只计时长`"
-  >
-    <template #filters>
-      <n-radio-group v-model:value="type" size="small">
-        <n-radio-button
-          v-for="item in typeOptions"
-          :key="item.value"
-          :value="item.value"
-          :label="item.label"
-        />
-      </n-radio-group>
-      <n-input
+  <div class="page">
+    <div class="top">
+      <span class="title">自学情况</span>
+      <span class="grow" />
+      <div class="seg">
+        <button type="button" :class="{ on: type === 'python' }" @click="pickType('python')">
+          Python
+        </button>
+        <button type="button" :class="{ on: type === 'c' }" @click="pickType('c')">C 语言</button>
+      </div>
+      <n-select
         v-model:value="className"
-        placeholder="班级或年级，如 241 / 24"
-        clearable
-        style="width: 200px"
-        @keyup.enter="load"
-        @clear="load"
+        :options="classOptions"
+        filterable
+        placeholder="选班级"
+        style="width: 170px"
       />
-      <n-button type="primary" secondary @click="load">查询</n-button>
-    </template>
-  </PageHeader>
+    </div>
 
-  <n-grid cols="2 s:3 m:5" :x-gap="12" :y-gap="12" responsive="screen" style="margin-bottom: 16px">
-    <n-gi>
-      <n-card size="small" :bordered="true">
-        <n-statistic label="学生" :value="studentCount" />
-      </n-card>
-    </n-gi>
-    <n-gi>
-      <n-card size="small">
-        <n-statistic label="已开始" :value="startedCount">
-          <template #suffix>/ {{ students.length }}</template>
-        </n-statistic>
-      </n-card>
-    </n-gi>
-    <n-gi>
-      <n-card size="small">
-        <n-statistic label="人均已读课数" :value="avgRead">
-          <template #suffix>/ {{ tutorialCount }}</template>
-        </n-statistic>
-      </n-card>
-    </n-gi>
-    <n-gi>
-      <n-card size="small">
-        <n-statistic label="练一练做对率" :value="solveRate === null ? '-' : `${solveRate}%`" />
-      </n-card>
-    </n-gi>
-    <n-gi>
-      <n-card size="small">
-        <n-statistic label="停滞（7 天没学）" :value="statusCounts.stalled">
-          <template #suffix>人</template>
-        </n-statistic>
-      </n-card>
-    </n-gi>
-  </n-grid>
+    <n-spin :show="loading">
+      <n-empty v-if="board && !board.className" description="选一个班看看" style="margin: 60px 0" />
+      <template v-else-if="board">
+        <div class="stats">
+          <div class="stat">
+            <div class="stat-label">打开过教程</div>
+            <div class="stat-value">
+              {{ started.length }}<span class="unit"> / {{ board.students.length }} 人</span>
+            </div>
+          </div>
+          <div class="stat">
+            <div class="stat-label">学完过至少一课</div>
+            <div class="stat-value">{{ finishedOne }}<span class="unit"> 人</span></div>
+          </div>
+          <div class="stat">
+            <div class="stat-label">人均停留</div>
+            <div class="stat-value">{{ readableDuration(avgSeconds) }}</div>
+          </div>
+        </div>
 
-  <n-tabs v-model:value="tab" type="line" animated>
-    <n-tab-pane name="students" tab="按学生">
-      <n-flex align="center" style="margin-bottom: 12px">
-        <n-input
-          v-model:value="keyword"
-          placeholder="搜索姓名或学号"
-          clearable
-          style="width: 200px"
-        />
-        <n-text v-if="keyword.trim()" depth="3"> 找到 {{ filteredStudents.length }} 人 </n-text>
-      </n-flex>
-      <n-flex :size="8" style="margin-bottom: 12px">
-        <n-tag checkable :checked="statusFilter === 'all'" @update:checked="statusFilter = 'all'">
-          全部 {{ students.length }}
-        </n-tag>
-        <n-tag
-          v-for="(meta, key) in STATUS_META"
-          :key="key"
-          checkable
-          :type="meta.type"
-          :checked="statusFilter === key"
-          @update:checked="statusFilter = statusFilter === key ? 'all' : key"
-        >
-          {{ meta.label }} {{ statusCounts[key] }}
-        </n-tag>
-      </n-flex>
-      <n-data-table
-        :loading="loading"
-        :columns="studentColumns"
-        :data="filteredStudents"
-        :row-key="(row: LearnStudentProgress) => row.userId"
-        striped
-        :pagination="{ pageSize: 20 }"
+        <div class="main">
+          <section class="card grid-card">
+            <div class="grid-scroll">
+              <div class="line head">
+                <span class="c-name strong">学到哪了</span>
+                <div class="cells-head">
+                  <div v-for="group in groups" :key="group.lessons[0]!.id" class="group-head">
+                    <span class="group-no" :title="group.project">{{
+                      group.no || group.name
+                    }}</span>
+                    <span class="group-steps">
+                      <span
+                        v-for="lesson in group.lessons"
+                        :key="lesson.id"
+                        class="step"
+                        :title="splitTitle(lesson.title).kp"
+                      >
+                        {{ lesson.step }}
+                      </span>
+                    </span>
+                  </div>
+                </div>
+                <span class="c-num muted">练一练</span>
+                <span class="c-stay muted">停留</span>
+                <span class="c-last muted">最后学习</span>
+              </div>
+              <div v-for="row in started" :key="row.userId" class="line">
+                <span class="c-name"><UserName :username="row.username" /></span>
+                <div class="cells">
+                  <div v-for="group in groups" :key="group.lessons[0]!.id" class="group-cells">
+                    <span
+                      v-for="lesson in group.lessons"
+                      :key="lesson.id"
+                      class="cell"
+                      :class="cellOf(row, lesson.id)"
+                      :title="cellTitle(row, lesson.step, lesson.title, lesson.id)"
+                    />
+                  </div>
+                </div>
+                <span class="c-num num">{{ row.exerciseSolved || "-" }}</span>
+                <span class="c-stay num">{{ readableDuration(row.totalSeconds) }}</span>
+                <span class="c-last num muted">{{
+                  row.lastViewedAt ? parseTime(row.lastViewedAt, "M月D日 HH:mm") : "-"
+                }}</span>
+              </div>
+              <div v-if="!started.length" class="none muted">这个班还没人打开过</div>
+              <div v-else class="line foot">
+                <span class="c-name muted small">每课打开过</span>
+                <div class="cells bars">
+                  <div v-for="group in groups" :key="group.lessons[0]!.id" class="group-cells">
+                    <span v-for="lesson in group.lessons" :key="lesson.id" class="bar-col">
+                      <span class="bar-num num">{{ openedCount.get(lesson.id) || "" }}</span>
+                      <span
+                        class="bar"
+                        :class="{ zero: !openedCount.get(lesson.id) }"
+                        :style="{
+                          height: `${Math.max(2, ((openedCount.get(lesson.id) ?? 0) / maxOpened) * 40)}px`,
+                        }"
+                      />
+                    </span>
+                  </div>
+                </div>
+              </div>
+            </div>
+            <div v-if="idle.length" class="idle">
+              <div class="idle-head">
+                <span class="strong">还没打开过</span>
+                <span class="muted num">{{ idle.length }} 人</span>
+              </div>
+              <div class="chips">
+                <span v-for="row in idle" :key="row.userId" class="chip"
+                  ><UserName :username="row.username"
+                /></span>
+              </div>
+            </div>
+          </section>
+
+          <section class="card side">
+            <div class="side-head">
+              <span class="strong">练一练</span>
+              <span class="grow" />
+              <n-select
+                v-model:value="lessonId"
+                :options="lessonOptions"
+                size="small"
+                style="width: 170px"
+              />
+            </div>
+            <div v-if="!lessonExercises.length" class="muted none">这课没有练一练</div>
+            <div v-for="row in lessonExercises" :key="row.exerciseId" class="ex">
+              <button type="button" class="ex-main" @click="expanded = row.exerciseId">
+                <span class="ex-line">
+                  <span class="kind">{{ KIND[row.type] ?? row.type }}</span>
+                  <span class="question">{{ row.question || "（没有题干）" }}</span>
+                  <Icon icon="ph:caret-right-bold" :width="12" class="muted" />
+                </span>
+                <span class="ex-line small num">
+                  <span>做对 {{ row.solvedUsers }} / 做过 {{ row.triedUsers }}</span>
+                  <span class="muted">一次就对 {{ row.firstTryUsers }}</span>
+                  <span v-if="flag(row)" class="flag">{{ flag(row) }}</span>
+                </span>
+              </button>
+            </div>
+          </section>
+        </div>
+      </template>
+    </n-spin>
+
+    <!-- 点一道练一练：每个人做了几次、最后一次错在哪 -->
+    <n-modal
+      :show="expanded !== null"
+      preset="card"
+      :title="exercises.find((row) => row.exerciseId === expanded)?.question || '练一练'"
+      style="width: 820px; max-width: 95vw"
+      @update:show="(show: boolean) => !show && (expanded = null)"
+    >
+      <ExerciseAttempts
+        v-if="expanded !== null"
+        :exercise-id="expanded"
+        :class-name="board?.className ?? ''"
       />
-    </n-tab-pane>
-    <n-tab-pane name="exercises" tab="按练习">
-      <n-data-table
-        :loading="loading"
-        :columns="exerciseColumns"
-        :data="exercises"
-        :row-key="(row: LearnExerciseProgress) => row.exerciseId"
-        v-model:expanded-row-keys="expanded"
-        striped
-        :pagination="{ pageSize: 20 }"
-      />
-    </n-tab-pane>
-    <n-tab-pane name="tutorials" tab="按课程">
-      <n-data-table
-        :loading="loading"
-        :columns="tutorialColumns"
-        :data="tutorials"
-        :row-key="(row: LearnTutorialProgress) => row.tutorialId"
-        striped
-        :pagination="{ pageSize: 20 }"
-      />
-    </n-tab-pane>
-  </n-tabs>
+    </n-modal>
+  </div>
 </template>
+
+<style scoped>
+.page {
+  display: flex;
+  flex-direction: column;
+  gap: 16px;
+}
+.top {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+}
+.title {
+  font-size: 20px;
+  font-weight: 700;
+}
+.grow {
+  flex: 1;
+}
+.muted {
+  opacity: 0.6;
+}
+.small {
+  font-size: 12px;
+}
+.strong {
+  font-weight: 700;
+}
+.num {
+  font-variant-numeric: tabular-nums;
+}
+.seg {
+  display: flex;
+}
+.seg button {
+  height: 32px;
+  padding: 0 12px;
+  border: 1px solid rgba(128, 128, 128, 0.3);
+  background: transparent;
+  color: inherit;
+  font: inherit;
+  font-size: 13px;
+  cursor: pointer;
+}
+.seg button:first-child {
+  border-radius: 4px 0 0 4px;
+}
+.seg button:last-child {
+  border-radius: 0 4px 4px 0;
+  margin-left: -1px;
+}
+.seg button.on {
+  border-color: #18a058;
+  color: var(--learn-green-text);
+  font-weight: 600;
+  position: relative;
+}
+.card {
+  border: 1px solid rgba(128, 128, 128, 0.22);
+  border-radius: 8px;
+}
+.stats {
+  display: grid;
+  grid-template-columns: repeat(3, minmax(0, 1fr));
+  gap: 12px;
+  margin-bottom: 16px;
+}
+.stat {
+  border: 1px solid rgba(128, 128, 128, 0.22);
+  border-radius: 8px;
+  padding: 14px 18px;
+}
+.stat-label {
+  font-size: 13px;
+  opacity: 0.6;
+}
+.stat-value {
+  font-size: 26px;
+  font-weight: 700;
+  font-variant-numeric: tabular-nums;
+}
+.unit {
+  font-size: 15px;
+  font-weight: 400;
+  opacity: 0.6;
+}
+.main {
+  display: flex;
+  gap: 16px;
+  align-items: flex-start;
+}
+.grid-card {
+  flex: 1;
+  min-width: 0;
+  overflow: hidden;
+}
+.grid-scroll {
+  overflow-x: auto;
+}
+.line {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  min-height: 34px;
+  padding: 0 16px;
+  border-top: 1px solid rgba(128, 128, 128, 0.1);
+  width: max-content;
+  min-width: 100%;
+  box-sizing: border-box;
+}
+.line.head {
+  align-items: flex-end;
+  padding-top: 12px;
+  padding-bottom: 6px;
+  border-top: 0;
+}
+.c-name {
+  width: 118px;
+  flex-shrink: 0;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  font-size: 14px;
+}
+.cells,
+.cells-head {
+  display: flex;
+  gap: 8px;
+}
+.group-head {
+  display: flex;
+  flex-direction: column;
+  gap: 3px;
+}
+.group-no {
+  font-size: 11px;
+  opacity: 0.6;
+  text-align: center;
+  border-bottom: 1px solid rgba(128, 128, 128, 0.25);
+  padding-bottom: 2px;
+  white-space: nowrap;
+}
+.group-steps,
+.group-cells {
+  display: flex;
+  gap: 2px;
+}
+.step {
+  width: 18px;
+  text-align: center;
+  font-size: 11px;
+  opacity: 0.6;
+  font-variant-numeric: tabular-nums;
+}
+.cell {
+  width: 18px;
+  height: 18px;
+  border-radius: 3px;
+  background: rgba(128, 128, 128, 0.12);
+}
+.cell.opened {
+  background: rgba(24, 160, 88, 0.3);
+}
+.cell.done {
+  background: #18a058;
+}
+.c-num {
+  width: 52px;
+  text-align: right;
+  font-size: 13px;
+  flex-shrink: 0;
+}
+.c-stay {
+  width: 80px;
+  text-align: right;
+  font-size: 13px;
+  white-space: nowrap;
+  flex-shrink: 0;
+}
+.c-last {
+  width: 92px;
+  text-align: right;
+  font-size: 13px;
+  white-space: nowrap;
+  flex-shrink: 0;
+}
+.foot {
+  align-items: flex-end;
+  padding-top: 10px;
+  padding-bottom: 12px;
+  border-top-color: rgba(128, 128, 128, 0.22);
+}
+.bars {
+  align-items: flex-end;
+}
+.bars .group-cells {
+  align-items: flex-end;
+}
+.bar-col {
+  width: 18px;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  gap: 2px;
+}
+.bar-num {
+  font-size: 11px;
+  opacity: 0.8;
+}
+.bar {
+  width: 12px;
+  border-radius: 2px;
+  background: rgba(24, 160, 88, 0.45);
+}
+.bar.zero {
+  background: rgba(128, 128, 128, 0.2);
+}
+.none {
+  padding: 16px;
+  font-size: 13px;
+}
+.idle {
+  padding: 14px 16px 16px;
+  border-top: 1px solid rgba(128, 128, 128, 0.22);
+}
+.idle-head {
+  display: flex;
+  gap: 8px;
+  margin-bottom: 10px;
+  font-size: 14px;
+}
+.chips {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 6px;
+}
+.chip {
+  height: 26px;
+  padding: 0 10px;
+  border: 1px solid rgba(128, 128, 128, 0.25);
+  border-radius: 13px;
+  display: inline-flex;
+  align-items: center;
+  font-size: 12px;
+}
+.side {
+  width: 270px;
+  flex-shrink: 0;
+  padding: 14px 16px;
+}
+.side-head {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  margin-bottom: 4px;
+}
+.ex {
+  border-top: 1px solid rgba(128, 128, 128, 0.12);
+}
+.ex-main {
+  width: 100%;
+  padding: 10px 0;
+  border: 0;
+  background: transparent;
+  color: inherit;
+  font: inherit;
+  text-align: left;
+  display: flex;
+  flex-direction: column;
+  gap: 6px;
+  cursor: pointer;
+}
+.ex-line {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  min-width: 0;
+}
+.kind {
+  height: 22px;
+  padding: 0 8px;
+  border-radius: 3px;
+  font-size: 12px;
+  display: inline-flex;
+  align-items: center;
+  background: rgba(128, 128, 128, 0.12);
+  flex-shrink: 0;
+}
+.question {
+  flex: 1;
+  min-width: 0;
+  font-size: 13px;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+.flag {
+  color: var(--learn-orange-text);
+}
+</style>
diff --git a/apps/web/src/admin/tutorial/components/Actions.vue b/apps/web/src/admin/tutorial/components/Actions.vue
deleted file mode 100644
index 3f1054b..0000000
--- a/apps/web/src/admin/tutorial/components/Actions.vue
+++ /dev/null
@@ -1,42 +0,0 @@
-<script lang="ts" setup>
-import { errorMessage } from "utils/api"
-import { deleteTutorial } from "admin/api"
-
-interface Props {
-  tutorialID: number
-}
-
-const props = defineProps<Props>()
-const emit = defineEmits(["deleted"])
-const router = useRouter()
-const message = useMessage()
-
-function goEdit() {
-  router.push({
-    name: "admin tutorial edit",
-    params: { tutorialID: props.tutorialID },
-  })
-}
-
-async function handleDelete() {
-  try {
-    await deleteTutorial(props.tutorialID)
-    message.success("删除成功")
-    emit("deleted")
-  } catch (err) {
-    message.error(errorMessage(err))
-  }
-}
-</script>
-<template>
-  <n-flex>
-    <n-button size="small" type="success" secondary @click="goEdit"> 编辑 </n-button>
-    <n-popconfirm @positive-click="handleDelete">
-      <template #trigger>
-        <n-button size="small" type="error" secondary>删除</n-button>
-      </template>
-      确定删除这个教程吗？
-    </n-popconfirm>
-  </n-flex>
-</template>
-<style scoped></style>
diff --git a/apps/web/src/admin/tutorial/components/ExerciseManager.vue b/apps/web/src/admin/tutorial/components/ExerciseManager.vue
index 7f1cfdc..3974803 100644
--- a/apps/web/src/admin/tutorial/components/ExerciseManager.vue
+++ b/apps/web/src/admin/tutorial/components/ExerciseManager.vue
@@ -1,4 +1,5 @@
 <script setup lang="ts">
+import { Icon } from "@iconify/vue"
 import { errorMessage } from "utils/api"
 import type {
   Exercise,
@@ -13,7 +14,17 @@ import type {
 } from "utils/types"
 import { getAdminExercises, createExercise, updateExercise, deleteExercise } from "admin/api"
 
-const props = defineProps<{ tutorialId: number }>()
+/**
+ * 编辑页右栏的「练一练」：一道一行，写着它在正文的哪一节；新建的直接插到正文光标处，
+ * 不用再「复制占位符」去粘。表单（七种题型）还是原来那个弹框。
+ */
+const props = defineProps<{ tutorialId: number; content: string }>()
+const emit = defineEmits<{
+  /** 把这道题的占位符插到正文光标处 */
+  insert: [exerciseId: number]
+  /** 列表变了（预览要跟着换） */
+  change: [exercises: Exercise[]]
+}>()
 const message = useMessage()
 const dialog = useDialog()
 
@@ -54,6 +65,19 @@ const debugLines = computed(() => (debugCode.value === "" ? [] : debugCode.value
 
 async function load() {
   exercises.value = await getAdminExercises(props.tutorialId)
+  emit("change", exercises.value)
+}
+
+/** 这道题在正文的哪一节：占位符前面最近的二级标题；没放进正文就是 null */
+function placeOf(id: number) {
+  const at = props.content.indexOf(`[[exercise:${id}]]`)
+  if (at < 0) return null
+  const before = props.content.slice(0, at).split("\n")
+  for (let i = before.length - 1; i >= 0; i--) {
+    const heading = before[i]!.match(/^##\s+(.+)$/)
+    if (heading) return heading[1]!.trim()
+  }
+  return "开头"
 }
 
 onMounted(load)
@@ -297,13 +321,14 @@ async function save() {
       })
       message.success("练习题已更新")
     } else {
-      await createExercise({
+      const created = await createExercise({
         tutorialId: props.tutorialId,
         type: formType.value,
         data,
         order: formOrder.value,
       })
-      message.success("练习题已创建")
+      message.success("已新建，插到了正文光标处")
+      emit("insert", created.id)
     }
     showForm.value = false
     await load()
@@ -325,76 +350,50 @@ function confirmDelete(id: number) {
   })
 }
 
-function copyPlaceholder(id: number) {
-  navigator.clipboard.writeText(`[[exercise:${id}]]`)
-  message.success(`已复制 [[exercise:${id}]]`)
-}
-
 const TYPE_NAMES: Record<ExerciseType, string> = {
-  mcq: "选择题",
-  sort: "代码排序",
-  fill: "代码填空",
-  match: "连线匹配",
-  predict: "输出预测",
-  debug: "代码找错",
-  group: "归类分组",
-}
-
-const TYPE_TAGS: Record<
-  ExerciseType,
-  "success" | "info" | "warning" | "error" | "primary" | "default"
-> = {
-  mcq: "success",
-  sort: "info",
-  fill: "warning",
-  match: "primary",
-  predict: "error",
-  debug: "info",
-  group: "warning",
+  mcq: "选择",
+  sort: "排序",
+  fill: "填空",
+  match: "连线",
+  predict: "预测输出",
+  debug: "找错",
+  group: "分组",
 }
 
 function typeName(type: ExerciseType) {
   return TYPE_NAMES[type] ?? type
 }
-
-function typeTagType(type: ExerciseType) {
-  return TYPE_TAGS[type] ?? "default"
-}
 </script>
 
 <template>
   <div>
-    <n-flex justify="space-between" align="center" style="margin-bottom: 16px">
-      <n-text>共 {{ exercises.length }} 道练习题</n-text>
-      <n-button type="primary" size="small" @click="openCreate">+ 添加练习题</n-button>
-    </n-flex>
-
-    <n-empty v-if="exercises.length === 0" description="暂无练习题" />
-
-    <n-list v-else bordered>
-      <n-list-item v-for="ex in exercises" :key="ex.id">
-        <n-flex justify="space-between" align="center">
-          <div>
-            <n-tag size="small" :type="typeTagType(ex.type)" :bordered="false">
-              {{ typeName(ex.type) }}
-            </n-tag>
-            <n-text style="margin-left: 10px">
-              {{ (ex.data as { question?: string }).question }}
-            </n-text>
-          </div>
-          <n-space :size="8">
-            <n-tooltip trigger="hover">
-              <template #trigger>
-                <n-button size="small" @click="copyPlaceholder(ex.id)"> 复制占位符 </n-button>
-              </template>
-              将 [[exercise:{{ ex.id }}]] 粘贴到 Markdown 内容中
-            </n-tooltip>
-            <n-button size="small" @click="openEdit(ex)">编辑</n-button>
-            <n-button size="small" type="error" @click="confirmDelete(ex.id)"> 删除 </n-button>
-          </n-space>
-        </n-flex>
-      </n-list-item>
-    </n-list>
+    <div class="head">
+      <span class="title">练一练</span>
+      <span class="muted">{{ exercises.length }} 道</span>
+      <span class="grow" />
+      <n-button size="small" @click="openCreate">
+        <template #icon><Icon icon="ph:plus" /></template>
+        新建
+      </n-button>
+    </div>
+    <div v-if="exercises.length === 0" class="muted empty">还没有练一练</div>
+    <div v-for="(ex, index) in exercises" :key="ex.id" class="item">
+      <div class="line">
+        <span class="muted num">{{ index + 1 }}</span>
+        <span class="type">{{ typeName(ex.type) }}</span>
+        <span class="question">{{ (ex.data as { question?: string }).question }}</span>
+      </div>
+      <div class="line sub">
+        <span v-if="placeOf(ex.id)" class="muted">在「{{ placeOf(ex.id) }}」</span>
+        <template v-else>
+          <span class="warn">还没放进正文</span>
+          <a href="#" @click.prevent="emit('insert', ex.id)">插到光标处</a>
+        </template>
+        <span class="grow" />
+        <a href="#" @click.prevent="openEdit(ex)">编辑</a>
+        <a href="#" class="danger" @click.prevent="confirmDelete(ex.id)">删除</a>
+      </div>
+    </div>
 
     <n-modal
       v-model:show="showForm"
@@ -628,3 +627,75 @@ function typeTagType(type: ExerciseType) {
     </n-modal>
   </div>
 </template>
+
+<style scoped>
+.head {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  margin-bottom: 4px;
+}
+.title {
+  font-weight: 700;
+}
+.muted {
+  opacity: 0.6;
+  font-size: 13px;
+}
+.num {
+  font-variant-numeric: tabular-nums;
+  font-size: 12px;
+}
+.grow {
+  flex: 1;
+}
+.empty {
+  padding: 8px 0;
+}
+.item {
+  padding: 9px 0;
+  border-top: 1px solid rgba(128, 128, 128, 0.15);
+  display: flex;
+  flex-direction: column;
+  gap: 4px;
+}
+.line {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  min-width: 0;
+}
+.sub {
+  font-size: 12px;
+  padding-left: 16px;
+}
+.type {
+  height: 22px;
+  padding: 0 8px;
+  border-radius: 3px;
+  font-size: 12px;
+  display: inline-flex;
+  align-items: center;
+  background: rgba(128, 128, 128, 0.12);
+  flex-shrink: 0;
+}
+.question {
+  flex: 1;
+  min-width: 0;
+  font-size: 13px;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+.warn {
+  color: #c77c02;
+}
+.sub a {
+  color: #18a058;
+  text-decoration: none;
+}
+.sub a.danger {
+  color: #d03050;
+  opacity: 0.8;
+}
+</style>
diff --git a/apps/web/src/admin/tutorial/components/RelatedProblems.vue b/apps/web/src/admin/tutorial/components/RelatedProblems.vue
new file mode 100644
index 0000000..4786fb2
--- /dev/null
+++ b/apps/web/src/admin/tutorial/components/RelatedProblems.vue
@@ -0,0 +1,202 @@
+<script setup lang="ts">
+import { Icon } from "@iconify/vue"
+import {
+  TUTORIAL_PROBLEM_MAX,
+  type AdminTutorialProblem,
+  type TutorialProblemCandidate,
+} from "@oj2/contract"
+import { errorMessage } from "utils/api"
+import { getTutorialProblemCandidates, setTutorialProblems } from "admin/api"
+
+/**
+ * 一课结尾「去做几道题」挑哪几道（设计稿「后台 · 编辑一课」右栏）。
+ * 不搜的时候列出必会题，搜的时候必会题排在前面。改了就存，不等页面上的「保存」。
+ */
+const props = defineProps<{ tutorialId: number; problems: AdminTutorialProblem[] }>()
+const emit = defineEmits<{ update: [problems: AdminTutorialProblem[]] }>()
+const message = useMessage()
+
+const keyword = ref("")
+const candidates = ref<TutorialProblemCandidate[]>([])
+const dragIndex = ref<number | null>(null)
+
+const suggestions = computed(() => {
+  const picked = new Set(props.problems.map((item) => item.id))
+  return candidates.value.filter((item) => !picked.has(item.id)).slice(0, 8)
+})
+
+async function search() {
+  try {
+    candidates.value = await getTutorialProblemCandidates(keyword.value.trim())
+  } catch {
+    candidates.value = []
+  }
+}
+const searchLater = useDebounceFn(search, 300)
+watch(keyword, searchLater)
+onMounted(search)
+
+async function save(next: AdminTutorialProblem[]) {
+  const before = props.problems
+  emit("update", next)
+  try {
+    await setTutorialProblems(
+      props.tutorialId,
+      next.map((item) => item.id),
+    )
+  } catch (err) {
+    emit("update", before)
+    message.error(errorMessage(err))
+  }
+}
+
+function add(item: TutorialProblemCandidate) {
+  if (props.problems.length >= TUTORIAL_PROBLEM_MAX) {
+    message.warning(`一课最多挂 ${TUTORIAL_PROBLEM_MAX} 道`)
+    return
+  }
+  const { tags: _, ...problem } = item
+  save([...props.problems, problem])
+}
+
+function remove(id: number) {
+  save(props.problems.filter((item) => item.id !== id))
+}
+
+function drop(target: number) {
+  const from = dragIndex.value
+  dragIndex.value = null
+  if (from === null || from === target) return
+  const next = [...props.problems]
+  const [moved] = next.splice(from, 1)
+  next.splice(target, 0, moved!)
+  save(next)
+}
+</script>
+
+<template>
+  <div>
+    <div class="head">
+      <span class="title">相关题</span>
+      <span class="muted">{{ problems.length }} 道</span>
+    </div>
+    <div
+      v-for="(problem, index) in problems"
+      :key="problem.id"
+      class="row"
+      draggable="true"
+      @dragstart="dragIndex = index"
+      @dragover.prevent
+      @drop="drop(index)"
+    >
+      <span class="handle" aria-hidden="true"
+        ><Icon icon="ph:dots-six-vertical-bold" :width="14"
+      /></span>
+      <span class="pid">{{ problem.displayId }}</span>
+      <span class="name">{{ problem.title }}</span>
+      <span v-if="problem.mustDo" class="must">必会</span>
+      <button type="button" class="x" aria-label="移除" @click="remove(problem.id)">
+        <Icon icon="ph:x" :width="13" />
+      </button>
+    </div>
+    <n-input v-model:value="keyword" size="small" clearable placeholder="题号或标题" class="search">
+      <template #prefix><Icon icon="ph:magnifying-glass" /></template>
+    </n-input>
+    <div v-if="!keyword.trim()" class="muted hint">必会题</div>
+    <div v-for="item in suggestions" :key="item.id" class="row">
+      <span class="pid">{{ item.displayId }}</span>
+      <span class="name">{{ item.title }}</span>
+      <span v-if="item.mustDo" class="must">必会</span>
+      <span v-else class="tags">{{ item.tags.join(" · ") }}</span>
+      <n-button size="tiny" @click="add(item)">
+        <template #icon><Icon icon="ph:plus" /></template>
+        加
+      </n-button>
+    </div>
+    <div v-if="keyword.trim() && !suggestions.length" class="muted hint">没找到</div>
+  </div>
+</template>
+
+<style scoped>
+.head {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  margin-bottom: 4px;
+}
+.title {
+  font-weight: 700;
+}
+.muted {
+  opacity: 0.6;
+  font-size: 13px;
+}
+.row {
+  height: 38px;
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  border-top: 1px solid rgba(128, 128, 128, 0.15);
+}
+.handle {
+  display: flex;
+  opacity: 0.45;
+  cursor: grab;
+}
+.pid {
+  width: 34px;
+  flex-shrink: 0;
+  font-size: 12px;
+  opacity: 0.6;
+  font-variant-numeric: tabular-nums;
+}
+.name {
+  flex: 1;
+  min-width: 0;
+  font-size: 13px;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+.must {
+  height: 20px;
+  padding: 0 6px;
+  border-radius: 3px;
+  font-size: 12px;
+  display: inline-flex;
+  align-items: center;
+  flex-shrink: 0;
+  background: rgba(240, 160, 32, 0.16);
+  color: #8a5200;
+}
+html.dark .must {
+  color: #f2c97d;
+}
+.tags {
+  font-size: 12px;
+  opacity: 0.55;
+  white-space: nowrap;
+  max-width: 90px;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+.x {
+  border: 0;
+  background: transparent;
+  color: inherit;
+  opacity: 0.55;
+  display: flex;
+  padding: 4px;
+  cursor: pointer;
+}
+.x:hover {
+  opacity: 1;
+}
+.search {
+  margin: 10px 0 4px;
+}
+.hint {
+  font-size: 12px;
+  margin: 8px 0 2px;
+}
+</style>
diff --git a/apps/web/src/admin/tutorial/detail.vue b/apps/web/src/admin/tutorial/detail.vue
index ea3b788..c78dc1a 100644
--- a/apps/web/src/admin/tutorial/detail.vue
+++ b/apps/web/src/admin/tutorial/detail.vue
@@ -1,123 +1,362 @@
 <script lang="ts" setup>
-import PageHeader from "admin/components/PageHeader.vue"
+import { Icon } from "@iconify/vue"
+import type { AdminTutorialProblem } from "@oj2/contract"
 import { errorMessage } from "utils/api"
-import CodeEditor from "shared/components/CodeEditor.vue"
 import MarkdownEditor from "shared/components/MarkdownEditor.vue"
-import type { TutorialEdit } from "utils/types"
-import { createTutorial, getTutorial, updateTutorial } from "../api"
+import type { Exercise, TutorialEdit, TutorialListItem } from "utils/types"
+import { parseLesson } from "oj/learn/composables/useLessonParse"
+import { joinTitle, lessonPath, splitTitle } from "oj/learn/lesson"
+import LessonBody from "oj/learn/components/LessonBody.vue"
+import "oj/learn/learn.css"
+import {
+  createTutorial,
+  deleteTutorial,
+  getTutorial,
+  getTutorialList,
+  updateTutorial,
+} from "../api"
 import ExerciseManager from "./components/ExerciseManager.vue"
+import RelatedProblems from "./components/RelatedProblems.vue"
 
-interface Props {
-  tutorialID?: string
-}
+/**
+ * 编辑一课（设计稿「后台 · 编辑一课」）：知识点 / 情境 / 项目三个字段，正文左边写、
+ * 右边用学生端同一套组件预览（练一练、能运行的代码块都看得到），右栏是练一练和相关题。
+ * 「示例代码」字段去掉了：正文里的代码块直接能运行。
+ */
+const props = defineProps<{ tutorialID?: string }>()
 
 const route = useRoute()
+const router = useRouter()
 const message = useMessage()
-const props = defineProps<Props>()
+
+const isCreate = computed(() => route.name === "admin tutorial create")
 
 const tutorial = reactive<TutorialEdit>({
   id: 0,
   title: "",
   content: "",
-  code: "",
+  project: typeof route.query.project === "string" ? route.query.project : "",
   isPublic: false,
   order: 0,
-  type: "python", // 默认选择 Python
+  type: route.query.type === "c" ? "c" : "python",
 })
+const kp = ref("")
+const scene = ref("")
+const problems = ref<AdminTutorialProblem[]>([])
+const exercises = ref<Exercise[]>([])
+const allTutorials = ref<{ [key: string]: TutorialListItem[] }>({ python: [], c: [] })
+const saving = ref(false)
+const editor = useTemplateRef<InstanceType<typeof MarkdownEditor>>("editor")
 
 const typeOptions = [
   { label: "Python", value: "python" },
   { label: "C 语言", value: "c" },
 ]
 
+const siblings = computed(() => allTutorials.value[tutorial.type] ?? [])
+const projectOptions = computed(() => {
+  const names = [...new Set(siblings.value.map((item) => item.project).filter(Boolean))]
+  if (tutorial.project && !names.includes(tutorial.project)) names.push(tutorial.project)
+  return names.map((name) => ({ label: name, value: name }))
+})
+/** 学生那边是第几课：只数公开的 */
+const step = computed(() => {
+  const visible = siblings.value.filter((item) => item.isPublic)
+  const index = visible.findIndex((item) => item.id === tutorial.id)
+  return index >= 0 ? index + 1 : null
+})
+const heading = computed(() => {
+  if (isCreate.value) return "新建一课"
+  const label = tutorial.type === "c" ? "C 语言" : "Python"
+  return step.value ? `${label} 第 ${step.value} 课` : `${label} · 没公开`
+})
+const preview = computed(() => parseLesson(tutorial.content, exercises.value))
+
 async function init() {
+  allTutorials.value = await getTutorialList().catch(() => ({ python: [], c: [] }))
   if (!props.tutorialID) {
+    // 新建：顺序排在这门课最后
+    tutorial.order = Math.max(0, ...siblings.value.map((item) => item.order)) + 1
     return
   }
-  const id = parseInt(route.params.tutorialID as string)
-  const data = await getTutorial(id)
+  const data = await getTutorial(parseInt(props.tutorialID))
   tutorial.id = data.id
   tutorial.title = data.title
   tutorial.content = data.content
-  tutorial.code = data.code || ""
+  tutorial.project = data.project
   tutorial.isPublic = data.isPublic
   tutorial.order = data.order
-  tutorial.type = data.type || "python"
+  tutorial.type = data.type
+  problems.value = data.problems
+  const parts = splitTitle(data.title)
+  kp.value = parts.kp
+  scene.value = parts.scene
 }
 
 async function submit() {
-  if (!tutorial.title || !tutorial.content) {
-    message.error("标题和正文必填")
+  tutorial.title = joinTitle(kp.value, scene.value)
+  if (!kp.value.trim() || !tutorial.content.trim()) {
+    message.error("知识点和正文必填")
     return
   }
+  saving.value = true
   try {
-    if (route.name === "admin tutorial create") {
-      await createTutorial({
-        title: tutorial.title,
-        content: tutorial.content,
-        code: tutorial.code,
-        isPublic: tutorial.isPublic,
-        order: tutorial.order,
-        type: tutorial.type,
-      })
-      message.success("成功新建教程 💐")
+    if (isCreate.value) {
+      const created = await createTutorial(tutorial)
+      message.success("已新建，接着可以加练一练和相关题")
+      router.replace({ name: "admin tutorial edit", params: { tutorialID: created.id } })
     } else {
       await updateTutorial(tutorial)
-      message.success("修改已保存")
+      message.success("已保存")
+      allTutorials.value = await getTutorialList().catch(() => allTutorials.value)
     }
   } catch (err) {
     message.error(errorMessage(err))
+  } finally {
+    saving.value = false
+  }
+}
+
+async function remove() {
+  try {
+    await deleteTutorial(tutorial.id)
+    message.success("已删除")
+    router.push({ name: "admin tutorial list" })
+  } catch (err) {
+    message.error(errorMessage(err))
   }
 }
 
+function insertExercise(id: number) {
+  editor.value?.insert(`[[exercise:${id}]]`)
+}
+
+function openStudentView() {
+  if (step.value) window.open(router.resolve(lessonPath(tutorial.type, step.value)).href, "_blank")
+}
+
+watch(() => props.tutorialID, init)
 onMounted(init)
 </script>
+
 <template>
-  <PageHeader
-    :title="route.name === 'admin tutorial create' ? '新建教程' : '编辑教程'"
-    :back="{ name: 'admin tutorial list' }"
-  />
-  <n-form inline>
-    <n-form-item label="标题">
-      <n-input class="contestTitle" v-model:value="tutorial.title" />
-    </n-form-item>
-    <n-form-item label="语言">
-      <n-select v-model:value="tutorial.type" :options="typeOptions" class="select" />
-    </n-form-item>
-    <n-form-item label="顺序">
-      <n-input-number style="width: 100px" v-model:value="tutorial.order" :min="0" />
-    </n-form-item>
-    <n-form-item label="可见">
-      <n-switch v-model:value="tutorial.isPublic" />
-    </n-form-item>
-    <n-form-item>
-      <n-button type="primary" @click="submit">保存</n-button>
-    </n-form-item>
-  </n-form>
+  <div class="page">
+    <div class="top">
+      <router-link :to="{ name: 'admin tutorial list' }" class="back">
+        <Icon icon="ph:caret-left-bold" :width="13" />教程
+      </router-link>
+      <span class="slash">/</span>
+      <span class="heading">{{ heading }}</span>
+      <span class="grow" />
+      <label class="public">
+        <n-switch v-model:value="tutorial.isPublic" size="small" />
+        公开
+      </label>
+      <n-button v-if="!isCreate" :disabled="!step" @click="openStudentView">
+        <template #icon><Icon icon="ph:eye" /></template>
+        看学生那边
+      </n-button>
+      <n-popconfirm v-if="!isCreate" @positive-click="remove">
+        <template #trigger>
+          <n-button quaternary type="error">删除</n-button>
+        </template>
+        这一课连同它的练一练、学生的进度一起删掉，确定吗？
+      </n-popconfirm>
+      <n-button type="primary" :loading="saving" @click="submit">保存</n-button>
+    </div>
 
-  <n-tabs type="line" animated>
-    <n-tab-pane name="content" tab="教程内容">
-      <MarkdownEditor v-model:value="tutorial.content" />
-    </n-tab-pane>
-    <n-tab-pane name="code" tab="示例代码">
-      <CodeEditor
-        v-model:value="tutorial.code"
-        :language="tutorial.type === 'python' ? 'Python' : 'C'"
-        height="400px"
-      />
-    </n-tab-pane>
-    <n-tab-pane name="exercises" tab="练习题" :disabled="!tutorial.id">
-      <ExerciseManager v-if="tutorial.id" :tutorial-id="tutorial.id" />
-      <n-empty v-else description="请先保存教程后再添加练习题" />
-    </n-tab-pane>
-  </n-tabs>
+    <div class="fields">
+      <label class="field">
+        <span>知识点</span>
+        <n-input v-model:value="kp" placeholder="条件语句基础" style="width: 200px" />
+      </label>
+      <label class="field">
+        <span>情境</span>
+        <n-input v-model:value="scene" placeholder="蜜橘园环境预警" style="width: 200px" />
+      </label>
+      <label class="field">
+        <span>项目</span>
+        <n-select
+          v-model:value="tutorial.project"
+          :options="projectOptions"
+          filterable
+          tag
+          clearable
+          placeholder="选一个，或者打字新建"
+          style="width: 250px"
+        />
+      </label>
+      <label v-if="isCreate" class="field">
+        <span>语言</span>
+        <n-select v-model:value="tutorial.type" :options="typeOptions" style="width: 110px" />
+      </label>
+    </div>
+
+    <div class="work">
+      <section class="card editor-card">
+        <div class="card-head">
+          <span class="strong">正文</span>
+          <span class="muted">Markdown</span>
+        </div>
+        <div class="split">
+          <div class="source">
+            <MarkdownEditor
+              ref="editor"
+              v-model:value="tutorial.content"
+              :preview="false"
+              height="100%"
+            />
+          </div>
+          <div class="preview">
+            <LessonBody
+              :segments="preview.segments"
+              :lang="tutorial.type"
+              :tutorial-id="tutorial.id"
+              :exercise-count="preview.exerciseCount"
+              :solved-ids="new Set()"
+            />
+          </div>
+        </div>
+      </section>
+
+      <aside class="side">
+        <section class="card pad">
+          <ExerciseManager
+            v-if="tutorial.id"
+            :tutorial-id="tutorial.id"
+            :content="tutorial.content"
+            @insert="insertExercise"
+            @change="exercises = $event"
+          />
+          <div v-else class="muted">保存之后就能加练一练</div>
+        </section>
+        <section class="card pad">
+          <RelatedProblems
+            v-if="tutorial.id"
+            :tutorial-id="tutorial.id"
+            :problems="problems"
+            @update="problems = $event"
+          />
+          <div v-else class="muted">保存之后就能挑相关题</div>
+        </section>
+      </aside>
+    </div>
+  </div>
 </template>
-<style scoped>
-.select {
-  width: 100px;
-}
 
-.contestTitle {
-  width: 400px;
+<style scoped>
+.page {
+  display: flex;
+  flex-direction: column;
+  gap: 14px;
+  height: calc(100vh - 96px);
+  min-height: 600px;
+}
+.top {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+}
+.back {
+  display: inline-flex;
+  align-items: center;
+  gap: 2px;
+  font-size: 13px;
+  color: #18a058;
+  text-decoration: none;
+}
+.slash {
+  opacity: 0.4;
+}
+.heading {
+  font-size: 18px;
+  font-weight: 700;
+}
+.grow {
+  flex: 1;
+}
+.public {
+  display: inline-flex;
+  align-items: center;
+  gap: 6px;
+  font-size: 13px;
+}
+.fields {
+  display: flex;
+  align-items: center;
+  gap: 16px;
+  flex-wrap: wrap;
+}
+.field {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  font-size: 13px;
+}
+.work {
+  flex: 1;
+  min-height: 0;
+  display: flex;
+  gap: 16px;
+}
+.card {
+  border: 1px solid rgba(128, 128, 128, 0.22);
+  border-radius: 8px;
+}
+.pad {
+  padding: 12px 14px;
+}
+.editor-card {
+  flex: 1;
+  min-width: 0;
+  display: flex;
+  flex-direction: column;
+  overflow: hidden;
+}
+.card-head {
+  height: 38px;
+  flex-shrink: 0;
+  padding: 0 12px;
+  display: flex;
+  align-items: center;
+  gap: 6px;
+  border-bottom: 1px solid rgba(128, 128, 128, 0.22);
+  font-size: 13px;
+}
+.strong {
+  font-weight: 600;
+}
+.muted {
+  opacity: 0.6;
+  font-size: 13px;
+}
+.split {
+  flex: 1;
+  min-height: 0;
+  display: flex;
+}
+.source {
+  flex: 0 0 50%;
+  min-width: 0;
+  border-right: 1px solid rgba(128, 128, 128, 0.22);
+}
+.source :deep(.md-editor) {
+  border: 0;
+  border-radius: 0;
+}
+.preview {
+  flex: 0 0 50%;
+  min-width: 0;
+  box-sizing: border-box;
+  padding: 12px 20px;
+  overflow-y: auto;
+}
+.side {
+  width: 330px;
+  flex-shrink: 0;
+  display: flex;
+  flex-direction: column;
+  gap: 14px;
+  overflow-y: auto;
 }
 </style>
diff --git a/apps/web/src/admin/tutorial/list.vue b/apps/web/src/admin/tutorial/list.vue
index 119aa06..c16c357 100644
--- a/apps/web/src/admin/tutorial/list.vue
+++ b/apps/web/src/admin/tutorial/list.vue
@@ -1,96 +1,429 @@
 <script setup lang="ts">
-import PageHeader from "admin/components/PageHeader.vue"
+import { Icon } from "@iconify/vue"
 import { errorMessage } from "utils/api"
-import { NSwitch } from "naive-ui"
-import { parseTime } from "utils/functions"
 import type { TutorialListItem } from "utils/types"
-import { getTutorialList, setTutorialVisibility } from "../api"
-import Actions from "./components/Actions.vue"
+import { groupByProject, splitTitle, type TutorialType } from "oj/learn/lesson"
+import ProjectTile from "oj/learn/components/ProjectTile.vue"
+import "oj/learn/learn.css"
+import {
+  getTutorialList,
+  renameTutorialProject,
+  reorderTutorials,
+  setTutorialVisibility,
+} from "../api"
 
-const tutorials = ref<{ [key: string]: TutorialListItem[] }>({
-  python: [],
-  c: [],
-})
+/**
+ * 教程列表（设计稿「后台 · 教程列表」）：按项目分组，拖动排序；每课看得到几道练一练、
+ * 挑没挑相关题、多少学生打开过。整组都没公开、又没填项目的（老教程）收起来放最后。
+ */
+const router = useRouter()
+const route = useRoute()
 const message = useMessage()
-const activeTab = ref("python")
 
-const columns: DataTableColumn<TutorialListItem>[] = [
-  {
-    title: "顺序",
-    key: "order",
-    width: 80,
-  },
-  { title: "标题", key: "title", minWidth: 200 },
-  {
-    title: "作者",
-    key: "createdBy",
-    render: (row) => row.createdBy?.username,
-    width: 80,
-  },
-  {
-    title: "创建时间",
-    key: "createdAt",
-    width: 180,
-    render: (row) => parseTime(row.createdAt!, "YYYY-MM-DD HH:mm:ss"),
-  },
-  {
-    title: "更新时间",
-    key: "updatedAt",
-    width: 180,
-    render: (row) => parseTime(row.updatedAt!, "YYYY-MM-DD HH:mm:ss"),
-  },
-  {
-    title: "可见",
-    key: "isPublic",
-    width: 100,
-    render: (row) =>
-      h(NSwitch, {
-        value: row.isPublic,
-        size: "small",
-        rubberBand: false,
-        onUpdateValue: () => toggleVisible(row),
-      }),
-  },
-  {
-    title: "操作",
-    key: "actions",
-    width: 140,
-    render: (row) => h(Actions, { tutorialID: row.id, onDeleted: listTutorials }),
-  },
-]
+const type = ref<TutorialType>(route.query.type === "c" ? "c" : "python")
+const all = ref<{ [key: string]: TutorialListItem[] }>({ python: [], c: [] })
+const collapsed = ref(new Set<string>())
+const renaming = ref<string | null>(null)
+const renameTo = ref("")
+const dragId = ref<number | null>(null)
+const showNewProject = ref(false)
+const newProject = ref("")
 
-async function toggleVisible(tutorial: TutorialListItem) {
-  tutorial.isPublic = !tutorial.isPublic
+const list = computed(() => all.value[type.value] ?? [])
+const groups = computed(() =>
+  groupByProject(list.value)
+    .map((group) => {
+      const items = group.lessons.map((lesson) => list.value.find((item) => item.id === lesson.id)!)
+      return {
+        ...group,
+        items,
+        key: `${group.project}:${group.lessons[0]!.id}`,
+        hidden: items.every((item) => !item.isPublic),
+      }
+    })
+    // 整组没公开、又没项目的老教程放到最后，别压在正在用的课上面
+    .sort((a, b) => Number(a.hidden && !a.project) - Number(b.hidden && !b.project)),
+)
+/** 学生那边看到的序号：只数公开的 */
+const publicStep = computed(() => {
+  const steps = new Map<number, number>()
+  list.value.filter((item) => item.isPublic).forEach((item, index) => steps.set(item.id, index + 1))
+  return steps
+})
+
+async function load() {
+  all.value = await getTutorialList()
+  // 整组没公开又没项目的（老教程）默认收起
+  collapsed.value = new Set(
+    groups.value.filter((group) => group.hidden && !group.project).map((group) => group.key),
+  )
+}
+
+function pickType(value: TutorialType) {
+  type.value = value
+  router.replace({ query: { type: value } })
+  load()
+}
+
+function toggle(key: string) {
+  const next = new Set(collapsed.value)
+  if (next.has(key)) next.delete(key)
+  else next.add(key)
+  collapsed.value = next
+}
+
+async function toggleVisible(item: TutorialListItem) {
+  item.isPublic = !item.isPublic
   try {
-    await setTutorialVisibility(tutorial.id, tutorial.isPublic)
-    message.success("更新成功")
+    await setTutorialVisibility(item.id, item.isPublic)
   } catch (err) {
+    item.isPublic = !item.isPublic
     message.error(errorMessage(err))
-    tutorial.isPublic = !tutorial.isPublic
   }
 }
 
-async function listTutorials() {
-  tutorials.value = await getTutorialList()
+function startRename(project: string) {
+  renaming.value = project
+  renameTo.value = project
 }
 
-onMounted(listTutorials)
+async function saveRename() {
+  const from = renaming.value
+  const to = renameTo.value.trim()
+  renaming.value = null
+  if (from === null || !to || to === from) return
+  try {
+    await renameTutorialProject(type.value, from, to)
+    await load()
+  } catch (err) {
+    message.error(errorMessage(err))
+  }
+}
+
+/** 拖动只在同一个项目里排：换项目到编辑页里改，免得一拖把课拖进别的项目 */
+async function drop(target: TutorialListItem) {
+  const from = list.value.find((item) => item.id === dragId.value)
+  dragId.value = null
+  if (!from || from.id === target.id) return
+  if (from.project !== target.project) {
+    message.warning("只能在同一个项目里拖，换项目请到编辑页里改")
+    return
+  }
+  const ids = list.value.map((item) => item.id).filter((id) => id !== from.id)
+  const at = ids.indexOf(target.id)
+  const fromIndex = list.value.findIndex((item) => item.id === from.id)
+  const targetIndex = list.value.findIndex((item) => item.id === target.id)
+  ids.splice(fromIndex < targetIndex ? at + 1 : at, 0, from.id)
+  // 先在本地换好位置，拖完立刻看到
+  const byId = new Map(list.value.map((item) => [item.id, item]))
+  all.value = {
+    ...all.value,
+    [type.value]: ids.map((id, index) => ({ ...byId.get(id)!, order: index + 1 })),
+  }
+  try {
+    await reorderTutorials(ids)
+  } catch (err) {
+    message.error(errorMessage(err))
+    await load()
+  }
+}
+
+function createIn(project: string) {
+  router.push({ name: "admin tutorial create", query: { type: type.value, project } })
+}
+
+function confirmNewProject() {
+  const name = newProject.value.trim()
+  if (!name) return
+  showNewProject.value = false
+  newProject.value = ""
+  createIn(name)
+}
+
+onMounted(load)
 </script>
 
 <template>
-  <PageHeader title="教程列表">
-    <template #actions>
-      <n-button type="primary" @click="$router.push({ name: 'admin tutorial create' })">
-        新建教程
+  <div class="page">
+    <div class="top">
+      <span class="title">教程</span>
+      <div class="seg">
+        <button type="button" :class="{ on: type === 'python' }" @click="pickType('python')">
+          Python
+        </button>
+        <button type="button" :class="{ on: type === 'c' }" @click="pickType('c')">C 语言</button>
+      </div>
+      <span class="grow" />
+      <n-button @click="showNewProject = true">
+        <template #icon><Icon icon="ph:plus" /></template>
+        新建项目
       </n-button>
-    </template>
-  </PageHeader>
-  <n-tabs v-model:value="activeTab" type="line" animated>
-    <n-tab-pane name="python" tab="Python">
-      <n-data-table striped :columns="columns" :data="tutorials.python" />
-    </n-tab-pane>
-    <n-tab-pane name="c" tab="C 语言">
-      <n-data-table striped :columns="columns" :data="tutorials.c" />
-    </n-tab-pane>
-  </n-tabs>
+      <n-button type="primary" @click="createIn('')">
+        <template #icon><Icon icon="ph:plus" /></template>
+        新建一课
+      </n-button>
+    </div>
+
+    <section class="table">
+      <div class="row headrow">
+        <span class="c-drag" />
+        <span class="c-no">#</span>
+        <span class="c-title">知识点 · 情境</span>
+        <span class="c-num">练一练</span>
+        <span class="c-num">相关题</span>
+        <span class="c-num wide">打开过的人</span>
+        <span class="c-switch">公开</span>
+        <span class="c-edit" />
+      </div>
+      <template v-for="group in groups" :key="group.key">
+        <div class="row grouprow">
+          <button
+            type="button"
+            class="fold"
+            :aria-label="collapsed.has(group.key) ? '展开' : '收起'"
+            @click="toggle(group.key)"
+          >
+            <Icon
+              :icon="collapsed.has(group.key) ? 'ph:caret-right-bold' : 'ph:caret-down-bold'"
+              :width="13"
+            />
+          </button>
+          <ProjectTile :icon="group.icon" :tone="group.tone" :size="26" />
+          <template v-if="renaming === group.project && group.project">
+            <n-input
+              v-model:value="renameTo"
+              size="small"
+              style="width: 280px"
+              autofocus
+              @keyup.enter="saveRename"
+              @keyup.esc="renaming = null"
+            />
+            <n-button size="small" type="primary" @click="saveRename">保存</n-button>
+            <n-button size="small" quaternary @click="renaming = null">取消</n-button>
+          </template>
+          <template v-else>
+            <span class="group-name">{{
+              group.project || (group.hidden ? "没公开" : "没有项目")
+            }}</span>
+            <span class="muted">{{ group.items.length }} 课</span>
+            <a v-if="group.project" href="#" @click.prevent="startRename(group.project)">改名</a>
+            <a href="#" @click.prevent="createIn(group.project)">加一课</a>
+          </template>
+        </div>
+        <template v-if="!collapsed.has(group.key)">
+          <div
+            v-for="item in group.items"
+            :key="item.id"
+            class="row lesson"
+            :class="{ off: !item.isPublic, dragging: dragId === item.id }"
+            draggable="true"
+            @dragstart="dragId = item.id"
+            @dragend="dragId = null"
+            @dragover.prevent
+            @drop="drop(item)"
+          >
+            <span class="c-drag handle" aria-hidden="true"
+              ><Icon icon="ph:dots-six-vertical-bold" :width="16"
+            /></span>
+            <span class="c-no num muted">{{ publicStep.get(item.id) ?? "—" }}</span>
+            <span class="c-title">
+              <span class="kp">{{ splitTitle(item.title).kp }}</span>
+              <span class="scene">{{ splitTitle(item.title).scene }}</span>
+            </span>
+            <span class="c-num num">{{ item.exerciseCount || "-" }}</span>
+            <span class="c-num num">
+              <template v-if="item.problemCount">{{ item.problemCount }}</template>
+              <span v-else class="warn">还没挑</span>
+            </span>
+            <span class="c-num wide num">{{ item.readers }}</span>
+            <span class="c-switch">
+              <n-switch
+                :value="item.isPublic"
+                size="small"
+                :rubber-band="false"
+                @update:value="toggleVisible(item)"
+              />
+            </span>
+            <router-link
+              :to="{ name: 'admin tutorial edit', params: { tutorialID: item.id } }"
+              class="c-edit"
+            >
+              编辑
+            </router-link>
+          </div>
+        </template>
+      </template>
+    </section>
+
+    <n-modal v-model:show="showNewProject" preset="card" title="新建项目" style="width: 420px">
+      <n-input
+        v-model:value="newProject"
+        placeholder="项目五 · 智慧物流·仓储管理"
+        maxlength="64"
+        @keyup.enter="confirmNewProject"
+      />
+      <template #footer>
+        <n-flex justify="end">
+          <n-button @click="showNewProject = false">取消</n-button>
+          <n-button type="primary" :disabled="!newProject.trim()" @click="confirmNewProject">
+            接着写第一课
+          </n-button>
+        </n-flex>
+      </template>
+    </n-modal>
+  </div>
 </template>
+
+<style scoped>
+.page {
+  display: flex;
+  flex-direction: column;
+  gap: 14px;
+}
+.top {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+}
+.title {
+  font-size: 20px;
+  font-weight: 700;
+}
+.seg {
+  display: flex;
+  margin-left: 8px;
+}
+.seg button {
+  height: 32px;
+  padding: 0 12px;
+  border: 1px solid rgba(128, 128, 128, 0.3);
+  background: transparent;
+  color: inherit;
+  font: inherit;
+  font-size: 13px;
+  cursor: pointer;
+}
+.seg button:first-child {
+  border-radius: 4px 0 0 4px;
+}
+.seg button:last-child {
+  border-radius: 0 4px 4px 0;
+  margin-left: -1px;
+}
+.seg button.on {
+  border-color: #18a058;
+  color: var(--learn-green-text);
+  font-weight: 600;
+  position: relative;
+}
+.grow {
+  flex: 1;
+}
+.muted {
+  opacity: 0.6;
+  font-size: 13px;
+}
+.num {
+  font-variant-numeric: tabular-nums;
+}
+.table {
+  border: 1px solid rgba(128, 128, 128, 0.22);
+  border-radius: 8px;
+  overflow: hidden;
+}
+.row {
+  display: flex;
+  align-items: center;
+  gap: 14px;
+  height: 44px;
+  padding: 0 16px;
+  border-top: 1px solid rgba(128, 128, 128, 0.12);
+}
+.headrow {
+  height: 38px;
+  border-top: 0;
+  font-size: 12px;
+  opacity: 0.6;
+}
+.grouprow {
+  gap: 10px;
+  background: rgba(128, 128, 128, 0.06);
+  border-top-color: rgba(128, 128, 128, 0.22);
+}
+.grouprow a {
+  font-size: 13px;
+  color: #18a058;
+  text-decoration: none;
+}
+.fold {
+  border: 0;
+  background: transparent;
+  color: inherit;
+  display: flex;
+  padding: 2px;
+  opacity: 0.55;
+  cursor: pointer;
+}
+.group-name {
+  font-weight: 700;
+}
+.lesson.off {
+  opacity: 0.6;
+}
+.lesson.dragging {
+  opacity: 0.35;
+}
+.handle {
+  display: flex;
+  opacity: 0.4;
+  cursor: grab;
+}
+.c-drag {
+  width: 16px;
+}
+.c-no {
+  width: 22px;
+  font-size: 13px;
+}
+.c-title {
+  flex: 1;
+  min-width: 0;
+  display: flex;
+  align-items: baseline;
+  gap: 10px;
+}
+.kp {
+  font-weight: 600;
+  white-space: nowrap;
+}
+.scene {
+  font-size: 13px;
+  opacity: 0.55;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+.c-num {
+  width: 70px;
+  text-align: right;
+  font-size: 13px;
+}
+.c-num.wide {
+  width: 80px;
+}
+.warn {
+  color: var(--learn-orange-text);
+}
+.c-switch {
+  width: 60px;
+  display: flex;
+  justify-content: center;
+}
+.c-edit {
+  width: 40px;
+  text-align: right;
+  font-size: 13px;
+  color: #18a058;
+  text-decoration: none;
+}
+</style>
diff --git a/apps/web/src/oj/api.ts b/apps/web/src/oj/api.ts
index 41bdba2..d81200a 100644
--- a/apps/web/src/oj/api.ts
+++ b/apps/web/src/oj/api.ts
@@ -9,6 +9,7 @@ import {
   type FormatCodeResponse,
   type Metrics,
   type TutorialSummary,
+  type Tutorial,
   type ClassActivity,
   type LastVisit,
   type ClassBoard,
@@ -67,7 +68,6 @@ import type {
   Submission,
   SubmissionListPayload,
   SubmitCodePayload,
-  Tutorial,
   TutorialProgress,
 } from "utils/types"
 
diff --git a/apps/web/src/oj/home/dashboard.vue b/apps/web/src/oj/home/dashboard.vue
index 87464a1..d37bec6 100644
--- a/apps/web/src/oj/home/dashboard.vue
+++ b/apps/web/src/oj/home/dashboard.vue
@@ -1,4 +1,5 @@
 <script setup lang="ts">
+import { continueStep, doneCount, lessonPath, splitTitle, type TutorialType } from "oj/learn/lesson"
 import { Icon } from "@iconify/vue"
 import {
   getAnnouncement,
@@ -29,8 +30,6 @@ import type {
   WeeklyRank,
 } from "utils/types"
 
-type TutorialType = "python" | "c"
-
 interface Track {
   type: TutorialType
   label: string
@@ -38,8 +37,8 @@ interface Track {
   step: number
   title: string
   total: number
-  /** 打开过的课数 */
-  read: number
+  /** 学完的课数（练一练全对） */
+  done: number
   lastViewedAt: string | null
 }
 
@@ -107,27 +106,26 @@ const weeklyText = computed(() => {
 })
 
 /**
- * 接着学哪一课看的是**服务端留痕**里最近打开的那一课，不是导航栏用的
- * localStorage：机房一台电脑轮着好几个班用，本地记的是上一个人学到哪。
+ * 接着学哪一课看的是**服务端留痕**（和自学首页同一套，oj/learn/lesson.ts），不是本机记的：
+ * 机房一台电脑轮着好几个班用，本地记的是上一个人学到哪。
  */
 async function loadTrack(type: TutorialType, label: string): Promise<Track | null> {
-  const [titles, progress] = await Promise.all([getTutorials(type), getLearnProgress(type)])
+  const [titles, rows] = await Promise.all([getTutorials(type), getLearnProgress(type)])
   if (!titles.length) return null
-  const seen = progress.filter((p) => p.lastViewedAt)
-  const latest = seen.reduce<(typeof seen)[number] | null>(
-    (acc, p) => (!acc || p.lastViewedAt! > acc.lastViewedAt! ? p : acc),
+  const progress = Object.fromEntries(rows.map((row) => [row.tutorialId, row]))
+  const step = continueStep(titles, progress) ?? 1
+  const lastViewedAt = rows.reduce<string | null>(
+    (acc, row) => (row.lastViewedAt && (!acc || row.lastViewedAt > acc) ? row.lastViewedAt : acc),
     null,
   )
-  const index = latest ? titles.findIndex((t) => t.id === latest.tutorialId) : -1
-  const step = index >= 0 ? index + 1 : 1
   return {
     type,
     label,
     step,
-    title: titles[step - 1]!.title,
+    title: splitTitle(titles[step - 1]!.title).kp,
     total: titles.length,
-    read: seen.length,
-    lastViewedAt: latest?.lastViewedAt ?? null,
+    done: doneCount(titles, progress),
+    lastViewedAt,
   }
 }
 
@@ -271,7 +269,7 @@ watch(
 )
 
 function learnLink(track: Track) {
-  return `/learn/${track.type}/${track.step.toString().padStart(2, "0")}`
+  return lessonPath(track.type, track.step)
 }
 
 const { jump, jumping } = useProblemJump()
@@ -441,13 +439,13 @@ async function openAnnouncement(item: AnnouncementListItem) {
                 <div class="track-title">{{ track.title }}</div>
                 <n-progress
                   type="line"
-                  :percentage="Math.round((track.read / track.total) * 100)"
+                  :percentage="Math.round((track.done / track.total) * 100)"
                   status="success"
                   :show-indicator="false"
                   :height="6"
                 />
                 <n-text depth="3" class="track-meta">
-                  已打开 {{ track.read }} 课
+                  学完 {{ track.done }} 课
                   <template v-if="track.lastViewedAt">
                     · 上次 {{ relativeTime(track.lastViewedAt) }}
                   </template>
diff --git a/apps/web/src/oj/learn/components/CodeRunBlock.vue b/apps/web/src/oj/learn/components/CodeRunBlock.vue
new file mode 100644
index 0000000..5e292ce
--- /dev/null
+++ b/apps/web/src/oj/learn/components/CodeRunBlock.vue
@@ -0,0 +1,343 @@
+<script setup lang="ts">
+import { Icon } from "@iconify/vue"
+import type { StatisticInfo, TrialRunResponse } from "@oj2/contract"
+import { errorMessage } from "utils/api"
+import { SubmissionStatus } from "utils/constants"
+import { trialRun } from "utils/judge"
+import { explainCCompileError } from "oj/problem/utils/cError"
+import { explainPythonCompileError } from "oj/problem/utils/pythonError"
+import { explainRuntimeError } from "oj/problem/utils/runtimeError"
+import { useAuthModalStore } from "shared/store/authModal"
+import { useUserStore } from "shared/store/user"
+
+const CodeEditor = defineAsyncComponent(() => import("shared/components/CodeEditor.vue"))
+
+/**
+ * 正文里的一段代码：就地改、就地运行（设计稿「代码块就地运行」那块画板）。
+ *
+ * 运行走题目页同一台判题机（POST /trial-runs，带 tutorialId），不算提交。
+ * 报错用题目页那套中文解释（pythonError / cError / runtimeError），原文收在下面。
+ * 代码里读输入（input() / scanf）才出输入框。
+ */
+const props = defineProps<{
+  code: string
+  lang: "python" | "c"
+  tutorialId: number
+}>()
+
+const userStore = useUserStore()
+const authModal = useAuthModalStore()
+const message = useMessage()
+const { copy } = useClipboard({ legacy: true })
+
+const value = ref(props.code)
+const input = ref("")
+const running = ref(false)
+
+type Outcome =
+  | { kind: "output"; text: string }
+  | { kind: "error"; title: string; message: string; raw: string }
+  | { kind: "busy"; message: string }
+const outcome = ref<Outcome | null>(null)
+
+// 换课时组件实例可能被复用（v-for 的 key 是段落序号），跟着原文重置
+watch(
+  () => props.code,
+  (code) => {
+    value.value = code
+    input.value = ""
+    outcome.value = null
+  },
+)
+
+const edited = computed(() => value.value !== props.code)
+const needsInput = computed(() =>
+  props.lang === "python"
+    ? /\binput\s*\(/.test(value.value)
+    : /\b(scanf|getchar|gets|fgets|cin)\b/.test(value.value),
+)
+const language = computed(() => (props.lang === "c" ? "C" : "Python"))
+const lineCount = computed(() => value.value.split("\n").length)
+
+const TOO_MUCH_OUTPUT =
+  "程序输出太多了，一直停不下来：多半是循环没有结束的条件（条件一直成立、循环变量忘了改），在不停地打印。"
+
+/** 判题机的临时目录名对学生没有意义，只留文件名 */
+function cleanRaw(text: string) {
+  return text.replace(/\/judger\/run\/[^/"]+\//g, "").trim()
+}
+
+function compileOutcome(raw: string): Outcome {
+  const ex =
+    props.lang === "python"
+      ? explainPythonCompileError(raw, value.value)
+      : explainCCompileError(raw, value.value, "C")
+  return {
+    kind: "error",
+    title: ex?.line ? `第 ${ex.line} 行出错` : "代码有错，没能运行",
+    message: ex?.message ?? "",
+    raw: cleanRaw(raw),
+  }
+}
+
+function runtimeOutcome(
+  result: SubmissionStatus,
+  output: string,
+  info: NonNullable<StatisticInfo["runtime_error"]> | undefined,
+): Outcome {
+  if (result === SubmissionStatus.runtime_error) {
+    return {
+      kind: "error",
+      title: info?.line ? `运行到第 ${info.line} 行出错了` : "运行到一半出错了",
+      message: info ? explainRuntimeError(info, value.value) : "",
+      raw: cleanRaw(output),
+    }
+  }
+  if (
+    result === SubmissionStatus.cpu_time_limit_exceeded ||
+    result === SubmissionStatus.real_time_limit_exceeded
+  ) {
+    return {
+      kind: "error",
+      title: "运行超时了",
+      message: needsInput.value
+        ? "程序一直没停下来：看看是不是在等输入（上面的输入框填够了吗），或者循环停不下来。"
+        : "程序一直没停下来：多半是循环没有结束的条件。",
+      raw: cleanRaw(output),
+    }
+  }
+  if (result === SubmissionStatus.memory_limit_exceeded) {
+    return { kind: "error", title: "内存用太多了", message: "", raw: cleanRaw(output) }
+  }
+  return { kind: "busy", message: "运行没成功，过一会儿再点一次。" }
+}
+
+function toOutcome(response: TrialRunResponse): Outcome {
+  if (response.status === "compile-error") return compileOutcome(response.message)
+  if (response.status === "too-much-output") {
+    return { kind: "error", title: "输出太多了", message: TOO_MUCH_OUTPUT, raw: "" }
+  }
+  const [item] = response.cases
+  if (!item) return { kind: "busy", message: "运行没成功，过一会儿再点一次。" }
+  const result = item.result as SubmissionStatus
+  if (result === SubmissionStatus.accepted || result === SubmissionStatus.wrong_answer) {
+    return { kind: "output", text: item.output.trimEnd() }
+  }
+  return runtimeOutcome(result, item.output, item.runtimeError)
+}
+
+async function run() {
+  if (!userStore.isAuthed) {
+    authModal.openLoginModal()
+    return
+  }
+  if (running.value || !value.value.trim()) return
+  running.value = true
+  try {
+    const response = await trialRun({
+      tutorialId: props.tutorialId,
+      language: language.value,
+      code: value.value,
+      cases: [{ input: input.value }],
+    })
+    outcome.value = toOutcome(response)
+  } catch (error) {
+    // 后端的文案是给学生看的（「上一次还没跑完」「试运行的人太多了」）
+    outcome.value = {
+      kind: "busy",
+      message: errorMessage(error, "运行的服务暂时连不上，过一会儿再试。"),
+    }
+  } finally {
+    running.value = false
+  }
+}
+
+function restore() {
+  value.value = props.code
+  outcome.value = null
+}
+
+async function copyCode() {
+  await copy(value.value)
+  message.success("已复制")
+}
+</script>
+
+<template>
+  <div class="block">
+    <div class="bar">
+      <span class="lang">{{ language }}</span>
+      <span class="grow" />
+      <template v-if="edited">
+        <span class="edited">改过</span>
+        <button type="button" class="tool" @click="restore">
+          <Icon icon="ph:arrow-counter-clockwise" :width="14" />还原
+        </button>
+      </template>
+      <button type="button" class="run" :class="{ busy: running }" :disabled="running" @click="run">
+        <template v-if="running">运行中…</template>
+        <template v-else><Icon icon="ph:play-fill" :width="12" />运行</template>
+      </button>
+      <button type="button" class="tool" aria-label="复制" @click="copyCode">
+        <Icon icon="ph:copy" :width="14" />
+      </button>
+    </div>
+    <div class="editor" :style="{ minHeight: `${lineCount * 22 + 16}px` }">
+      <CodeEditor v-model:value="value" :language="language" :font-size="14" height="auto" />
+    </div>
+    <div v-if="needsInput" class="pane input">
+      <div class="label">输入</div>
+      <n-input
+        v-model:value="input"
+        type="textarea"
+        :autosize="{ minRows: 1, maxRows: 6 }"
+        placeholder="程序要读的内容写在这里，一行一个"
+        class="mono"
+      />
+    </div>
+    <div v-if="outcome?.kind === 'output'" class="pane">
+      <div class="label">输出</div>
+      <pre class="out" :class="{ empty: !outcome.text }">{{
+        outcome.text || "（什么都没有输出）"
+      }}</pre>
+    </div>
+    <div v-else-if="outcome?.kind === 'error'" class="pane error">
+      <div class="label strong">{{ outcome.title }}</div>
+      <div v-if="outcome.message" class="explain">{{ outcome.message }}</div>
+      <pre v-if="outcome.raw" class="raw">{{ outcome.raw }}</pre>
+    </div>
+    <div v-else-if="outcome?.kind === 'busy'" class="pane">
+      <div class="busy-text">{{ outcome.message }}</div>
+    </div>
+  </div>
+</template>
+
+<style scoped>
+.block {
+  margin: 0 0 16px;
+  border: 1px solid var(--learn-line);
+  border-radius: 6px;
+  overflow: hidden;
+  background: var(--learn-soft);
+}
+.bar {
+  height: 36px;
+  box-sizing: border-box;
+  padding: 0 6px 0 14px;
+  display: flex;
+  align-items: center;
+  gap: 6px;
+  border-bottom: 1px solid var(--learn-line);
+  font-size: 12px;
+}
+.lang {
+  opacity: 0.55;
+}
+.grow {
+  flex: 1;
+}
+.edited {
+  color: var(--learn-orange-text);
+}
+.tool {
+  height: 26px;
+  padding: 0 8px;
+  border: 0;
+  border-radius: 4px;
+  background: transparent;
+  color: inherit;
+  opacity: 0.7;
+  font: inherit;
+  font-size: 12px;
+  display: inline-flex;
+  align-items: center;
+  gap: 4px;
+  cursor: pointer;
+}
+.tool:hover {
+  opacity: 1;
+  background: var(--learn-soft);
+}
+.run {
+  height: 26px;
+  box-sizing: border-box;
+  padding: 0 10px;
+  border-radius: 4px;
+  border: 1px solid var(--learn-green);
+  background: transparent;
+  color: var(--learn-green-text);
+  font: inherit;
+  font-size: 13px;
+  font-weight: 600;
+  display: inline-flex;
+  align-items: center;
+  gap: 5px;
+  cursor: pointer;
+}
+.run:hover {
+  background: var(--learn-green-bg);
+}
+.run.busy {
+  border-color: var(--learn-line);
+  color: inherit;
+  opacity: 0.6;
+  font-weight: 400;
+  cursor: default;
+}
+.editor :deep(.cm-editor) {
+  background: transparent;
+}
+.editor :deep(.cm-gutters) {
+  background: transparent;
+  border-right: 0;
+}
+.editor :deep(.cm-scroller) {
+  font-family: var(--learn-code-font);
+  line-height: 22px;
+  padding: 8px 0;
+}
+.pane {
+  border-top: 1px solid var(--learn-line);
+  padding: 10px 14px 12px;
+  background: var(--learn-pane);
+}
+.label {
+  font-size: 12px;
+  opacity: 0.6;
+  margin-bottom: 4px;
+}
+.label.strong {
+  opacity: 1;
+  font-weight: 600;
+  color: var(--learn-red-text);
+}
+.out,
+.raw {
+  margin: 0;
+  font-family: var(--learn-code-font);
+  font-size: 14px;
+  line-height: 22px;
+  white-space: pre-wrap;
+  word-break: break-all;
+}
+.out.empty {
+  opacity: 0.5;
+}
+.explain {
+  font-size: 14px;
+  line-height: 1.7;
+  margin-bottom: 6px;
+}
+.raw {
+  font-size: 12px;
+  line-height: 18px;
+  opacity: 0.55;
+}
+.busy-text {
+  font-size: 14px;
+  color: var(--learn-orange-text);
+}
+.mono :deep(textarea) {
+  font-family: var(--learn-code-font);
+}
+</style>
diff --git a/apps/web/src/oj/learn/components/ExerciseDebug.vue b/apps/web/src/oj/learn/components/ExerciseDebug.vue
index 0f7e479..765a7f3 100644
--- a/apps/web/src/oj/learn/components/ExerciseDebug.vue
+++ b/apps/web/src/oj/learn/components/ExerciseDebug.vue
@@ -1,4 +1,5 @@
 <script setup lang="ts">
+import ExerciseResult from "./ExerciseResult.vue"
 import type { Exercise, ExerciseDebugData } from "utils/types"
 import { highlightLines } from "../composables/useCodeHighlight"
 import "./exercise-highlight.css"
@@ -83,11 +84,7 @@ function reset() {
 </script>
 
 <template>
-  <n-card style="margin: 16px 0; border: 1.5px solid var(--n-border-color)">
-    <template #header>
-      <n-tag type="info" :bordered="false">练一练 · 代码找错</n-tag>
-    </template>
-
+  <div>
     <p style="font-weight: 500; font-size: 16px; margin-bottom: 8px">
       {{ data.question }}
     </p>
@@ -109,20 +106,19 @@ function reset() {
       </div>
     </n-space>
 
-    <n-alert
+    <ExerciseResult
       v-if="submitted"
       :type="allCorrect ? 'success' : 'error'"
       :title="allCorrect ? '找对了！' : '还没找全，红色行是错误所在'"
-      style="margin-top: 12px"
     >
       <template v-if="submitted && data.explanation" #default>
         {{ data.explanation }}
       </template>
-    </n-alert>
+    </ExerciseResult>
 
     <n-space style="margin-top: 12px" :size="8">
-      <n-button type="info" :disabled="locked" @click="submit">提交</n-button>
+      <n-button type="primary" :disabled="locked" @click="submit">提交</n-button>
       <n-button @click="reset">重置</n-button>
     </n-space>
-  </n-card>
+  </div>
 </template>
diff --git a/apps/web/src/oj/learn/components/ExerciseFill.vue b/apps/web/src/oj/learn/components/ExerciseFill.vue
index 26909f7..b1f2bc6 100644
--- a/apps/web/src/oj/learn/components/ExerciseFill.vue
+++ b/apps/web/src/oj/learn/components/ExerciseFill.vue
@@ -1,4 +1,5 @@
 <script setup lang="ts">
+import ExerciseResult from "./ExerciseResult.vue"
 import type { Exercise, ExerciseFillData } from "utils/types"
 import { highlight } from "../composables/useCodeHighlight"
 import "./exercise-highlight.css"
@@ -72,11 +73,7 @@ function inputWidth(idx: number): string {
 </script>
 
 <template>
-  <n-card style="margin: 16px 0; border: 1.5px solid var(--n-border-color)">
-    <template #header>
-      <n-tag type="warning" :bordered="false">练一练 · 代码填空</n-tag>
-    </template>
-
+  <div>
     <p style="font-weight: 500; font-size: 16px; margin-bottom: 12px">
       {{ data.question }}
     </p>
@@ -124,7 +121,7 @@ function inputWidth(idx: number): string {
         @input="userInputs[seg.index] = ($event.target as HTMLInputElement).value"
       /></template></pre>
 
-    <n-alert
+    <ExerciseResult
       v-if="wrongBlanks.size > 0 || allCorrect"
       :type="allCorrect ? 'success' : 'error'"
       :title="allCorrect ? '全部正确！' : '有填写错误，请检查红色标注的空位'"
@@ -132,8 +129,8 @@ function inputWidth(idx: number): string {
     />
 
     <n-space style="margin-top: 12px" :size="8">
-      <n-button type="warning" :disabled="allCorrect" @click="submit"> 提交 </n-button>
+      <n-button type="primary" :disabled="allCorrect" @click="submit"> 提交 </n-button>
       <n-button @click="reset">重置</n-button>
     </n-space>
-  </n-card>
+  </div>
 </template>
diff --git a/apps/web/src/oj/learn/components/ExerciseGroup.vue b/apps/web/src/oj/learn/components/ExerciseGroup.vue
index 2fa3c10..169d460 100644
--- a/apps/web/src/oj/learn/components/ExerciseGroup.vue
+++ b/apps/web/src/oj/learn/components/ExerciseGroup.vue
@@ -1,4 +1,5 @@
 <script setup lang="ts">
+import ExerciseResult from "./ExerciseResult.vue"
 import type { Exercise, ExerciseGroupData } from "utils/types"
 import { shuffle } from "../composables/useShuffle"
 
@@ -80,11 +81,7 @@ function reset() {
 </script>
 
 <template>
-  <n-card style="margin: 16px 0; border: 1.5px solid var(--n-border-color)">
-    <template #header>
-      <n-tag type="warning" :bordered="false">练一练 · 归类分组</n-tag>
-    </template>
-
+  <div>
     <p style="font-weight: 500; font-size: 16px; margin-bottom: 8px">
       {{ data.question }}
     </p>
@@ -156,16 +153,15 @@ function reset() {
       </div>
     </div>
 
-    <n-alert
+    <ExerciseResult
       v-if="submitted"
       :type="allCorrect ? 'success' : 'error'"
       :title="allCorrect ? '归类全部正确！' : '有归类错误，红色项需要调整'"
-      style="margin-top: 12px"
     />
 
     <n-space style="margin-top: 12px" :size="8">
-      <n-button type="warning" :disabled="!allPlaced || locked" @click="submit"> 提交 </n-button>
+      <n-button type="primary" :disabled="!allPlaced || locked" @click="submit"> 提交 </n-button>
       <n-button @click="reset">重置</n-button>
     </n-space>
-  </n-card>
+  </div>
 </template>
diff --git a/apps/web/src/oj/learn/components/ExerciseMatch.vue b/apps/web/src/oj/learn/components/ExerciseMatch.vue
index abf8c89..2c83557 100644
--- a/apps/web/src/oj/learn/components/ExerciseMatch.vue
+++ b/apps/web/src/oj/learn/components/ExerciseMatch.vue
@@ -1,4 +1,5 @@
 <script setup lang="ts">
+import ExerciseResult from "./ExerciseResult.vue"
 import type { Exercise, ExerciseMatchData } from "utils/types"
 import { shuffle } from "../composables/useShuffle"
 
@@ -129,11 +130,7 @@ function dotStyle(color: string): Record<string, string> {
 </script>
 
 <template>
-  <n-card style="margin: 16px 0; border: 1.5px solid var(--n-border-color)">
-    <template #header>
-      <n-tag type="primary" :bordered="false">练一练 · 连线匹配</n-tag>
-    </template>
-
+  <div>
     <p style="font-weight: 500; font-size: 16px; margin-bottom: 8px">
       {{ data.question }}
     </p>
@@ -173,16 +170,15 @@ function dotStyle(color: string): Record<string, string> {
       </n-space>
     </div>
 
-    <n-alert
+    <ExerciseResult
       v-if="submitted"
       :type="allCorrect ? 'success' : 'error'"
       :title="allCorrect ? '全部匹配正确！' : '有匹配错误，红色项需要重新连线'"
-      style="margin-top: 12px"
     />
 
     <n-space style="margin-top: 12px" :size="8">
       <n-button type="primary" :disabled="!allPaired || locked" @click="submit"> 提交 </n-button>
       <n-button @click="reset">重置</n-button>
     </n-space>
-  </n-card>
+  </div>
 </template>
diff --git a/apps/web/src/oj/learn/components/ExerciseMcq.vue b/apps/web/src/oj/learn/components/ExerciseMcq.vue
index 041fdb0..77b498c 100644
--- a/apps/web/src/oj/learn/components/ExerciseMcq.vue
+++ b/apps/web/src/oj/learn/components/ExerciseMcq.vue
@@ -1,4 +1,5 @@
 <script setup lang="ts">
+import ExerciseResult from "./ExerciseResult.vue"
 import type { Exercise, ExerciseMcqData } from "utils/types"
 
 const props = defineProps<{ exercise: Exercise }>()
@@ -8,6 +9,8 @@ const emit = defineEmits<{
 
 const data = computed(() => props.exercise.data as ExerciseMcqData)
 const isSingle = computed(() => data.value.answer.length === 1)
+// 选项都不长就排两列，省一半高度；有一条长的就一条一行，免得折成两三行
+const twoColumns = computed(() => data.value.options.every((opt) => opt.length <= 16))
 
 const selected = ref<Set<number>>(new Set())
 const correct = ref(false)
@@ -75,46 +78,29 @@ function optionType(idx: number): "default" | "primary" | "success" {
 </script>
 
 <template>
-  <n-card style="margin: 16px 0; border: 1.5px solid var(--n-border-color)">
-    <template #header>
-      <n-space align="center" :size="8">
-        <n-tag type="success" :bordered="false">
-          练一练 · {{ isSingle ? "单选题" : "多选题" }}
-        </n-tag>
-      </n-space>
-    </template>
-
-    <p style="font-weight: 500; font-size: 16px; margin-bottom: 12px">
+  <div>
+    <p class="question">
       {{ data.question }}
     </p>
 
-    <n-space vertical :size="8">
-      <n-button
+    <div class="opts" :class="{ wide: twoColumns }">
+      <button
         v-for="(opt, idx) in data.options"
         :key="idx"
-        :type="optionType(idx)"
-        :secondary="optionType(idx) !== 'default'"
-        :tertiary="optionType(idx) === 'default'"
-        :strong="selected.has(idx)"
-        :style="{
-          justifyContent: 'flex-start',
-          width: '100%',
-          textAlign: 'left',
-        }"
+        type="button"
+        class="opt"
+        :class="optionType(idx)"
         @click="select(idx)"
       >
-        <template #icon>
-          <span style="font-weight: 700">{{ String.fromCharCode(65 + idx) }}</span>
-        </template>
-        {{ opt }}
-      </n-button>
-    </n-space>
+        <span class="key">{{ String.fromCharCode(65 + idx) }}</span>
+        <span>{{ opt }}</span>
+      </button>
+    </div>
 
-    <n-alert
+    <ExerciseResult
       v-if="correct || wrong || partial"
       :type="correct ? 'success' : partial ? 'warning' : 'error'"
       :title="correct ? '正确！' : partial ? '部分正确，请重试' : '选择有误，请重试'"
-      style="margin-top: 12px"
     />
 
     <n-space style="margin-top: 12px" :size="8">
@@ -123,5 +109,73 @@ function optionType(idx: number): "default" | "primary" | "success" {
       </n-button>
       <n-button @click="reset">重置</n-button>
     </n-space>
-  </n-card>
+  </div>
 </template>
+
+<style scoped>
+.question {
+  font-weight: 600;
+  font-size: 15px;
+  line-height: 1.6;
+  margin: 0 0 12px;
+}
+.opts {
+  display: grid;
+  grid-template-columns: minmax(0, 1fr);
+  gap: 8px;
+}
+.opts.wide {
+  grid-template-columns: repeat(2, minmax(0, 1fr));
+}
+@media (max-width: 768px) {
+  .opts.wide {
+    grid-template-columns: minmax(0, 1fr);
+  }
+}
+.opt {
+  min-height: 40px;
+  box-sizing: border-box;
+  padding: 8px 12px;
+  border: 1px solid rgba(128, 128, 128, 0.3);
+  border-radius: 6px;
+  background: transparent;
+  color: inherit;
+  font: inherit;
+  font-size: 14px;
+  text-align: left;
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  cursor: pointer;
+}
+.opt:hover {
+  border-color: #18a058;
+}
+.key {
+  width: 22px;
+  height: 22px;
+  flex-shrink: 0;
+  box-sizing: border-box;
+  border-radius: 11px;
+  border: 1.5px solid rgba(128, 128, 128, 0.5);
+  display: grid;
+  place-items: center;
+  font-size: 12px;
+  opacity: 0.85;
+}
+.opt.primary {
+  border-color: #18a058;
+  background: rgba(24, 160, 88, 0.08);
+}
+.opt.primary .key,
+.opt.success .key {
+  border-color: #18a058;
+  background: #18a058;
+  color: #fff;
+  opacity: 1;
+}
+.opt.success {
+  border-color: #18a058;
+  background: rgba(24, 160, 88, 0.12);
+}
+</style>
diff --git a/apps/web/src/oj/learn/components/ExercisePredict.vue b/apps/web/src/oj/learn/components/ExercisePredict.vue
index af260a9..e9b5e84 100644
--- a/apps/web/src/oj/learn/components/ExercisePredict.vue
+++ b/apps/web/src/oj/learn/components/ExercisePredict.vue
@@ -1,4 +1,5 @@
 <script setup lang="ts">
+import ExerciseResult from "./ExerciseResult.vue"
 import type { Exercise, ExercisePredictData } from "utils/types"
 import { highlight } from "../composables/useCodeHighlight"
 import "./exercise-highlight.css"
@@ -55,11 +56,7 @@ function reset() {
 </script>
 
 <template>
-  <n-card style="margin: 16px 0; border: 1.5px solid var(--n-border-color)">
-    <template #header>
-      <n-tag type="error" :bordered="false">练一练 · 输出预测</n-tag>
-    </template>
-
+  <div>
     <p style="font-weight: 500; font-size: 16px; margin-bottom: 12px">
       {{ data.question }}
     </p>
@@ -88,16 +85,15 @@ function reset() {
       style="font-family: Monaco"
     />
 
-    <n-alert
+    <ExerciseResult
       v-if="submitted"
       :type="allCorrect ? 'success' : 'error'"
       :title="allCorrect ? '输出正确！' : '输出不正确，再读读代码看看'"
-      style="margin-top: 12px"
     />
 
     <n-space style="margin-top: 12px" :size="8">
-      <n-button type="error" :disabled="submitted && allCorrect" @click="submit"> 提交 </n-button>
+      <n-button type="primary" :disabled="submitted && allCorrect" @click="submit"> 提交 </n-button>
       <n-button @click="reset">重置</n-button>
     </n-space>
-  </n-card>
+  </div>
 </template>
diff --git a/apps/web/src/oj/learn/components/ExerciseResult.vue b/apps/web/src/oj/learn/components/ExerciseResult.vue
new file mode 100644
index 0000000..b6387be
--- /dev/null
+++ b/apps/web/src/oj/learn/components/ExerciseResult.vue
@@ -0,0 +1,43 @@
+<script setup lang="ts">
+import { Icon } from "@iconify/vue"
+
+/** 练一练判完的那一行：对了绿色打勾，错了红字。原来是 n-alert 一整块色条，比题目还抢眼 */
+defineProps<{ type: "success" | "warning" | "error"; title: string }>()
+</script>
+
+<template>
+  <div class="result" :class="type">
+    <div class="line">
+      <Icon v-if="type === 'success'" icon="ph:check-bold" :width="16" />
+      <span>{{ title }}</span>
+    </div>
+    <div v-if="$slots.default" class="more"><slot /></div>
+  </div>
+</template>
+
+<style scoped>
+.result {
+  margin-top: 12px;
+  font-size: 14px;
+  line-height: 1.6;
+}
+.line {
+  display: flex;
+  align-items: center;
+  gap: 6px;
+}
+.success .line {
+  color: #18a058;
+  font-weight: 600;
+}
+.warning .line {
+  color: var(--learn-orange-text);
+}
+.error .line {
+  color: var(--learn-red-text);
+}
+.more {
+  margin-top: 4px;
+  opacity: 0.85;
+}
+</style>
diff --git a/apps/web/src/oj/learn/components/ExerciseSort.vue b/apps/web/src/oj/learn/components/ExerciseSort.vue
index 8aafebe..9a045cb 100644
--- a/apps/web/src/oj/learn/components/ExerciseSort.vue
+++ b/apps/web/src/oj/learn/components/ExerciseSort.vue
@@ -1,4 +1,5 @@
 <script setup lang="ts">
+import ExerciseResult from "./ExerciseResult.vue"
 import type { Exercise, ExerciseSortData } from "utils/types"
 import { shuffle } from "../composables/useShuffle"
 import { highlightLines } from "../composables/useCodeHighlight"
@@ -70,11 +71,7 @@ const lineHtml = computed<string[]>(() => highlightLines(data.value.lines, props
 </script>
 
 <template>
-  <n-card style="margin: 16px 0; border: 1.5px solid var(--n-border-color)">
-    <template #header>
-      <n-tag type="info" :bordered="false">练一练 · 代码排序</n-tag>
-    </template>
-
+  <div>
     <p style="font-weight: 500; font-size: 16px; margin-bottom: 12px">
       {{ data.question }}
     </p>
@@ -116,16 +113,15 @@ const lineHtml = computed<string[]>(() => highlightLines(data.value.lines, props
       </div>
     </n-space>
 
-    <n-alert
+    <ExerciseResult
       v-if="submitted"
       :type="allCorrect ? 'success' : 'error'"
       :title="allCorrect ? '顺序正确！' : '顺序有误，红色行需要调整'"
-      style="margin-top: 12px"
     />
 
     <n-space style="margin-top: 12px" :size="8">
-      <n-button type="info" :disabled="submitted && allCorrect" @click="submit"> 提交 </n-button>
+      <n-button type="primary" :disabled="submitted && allCorrect" @click="submit"> 提交 </n-button>
       <n-button @click="reset">重置</n-button>
     </n-space>
-  </n-card>
+  </div>
 </template>
diff --git a/apps/web/src/oj/learn/components/ExerciseWidget.vue b/apps/web/src/oj/learn/components/ExerciseWidget.vue
index 1c65304..800baa5 100644
--- a/apps/web/src/oj/learn/components/ExerciseWidget.vue
+++ b/apps/web/src/oj/learn/components/ExerciseWidget.vue
@@ -1,5 +1,6 @@
 <script setup lang="ts">
-import type { Exercise } from "utils/types"
+import { Icon } from "@iconify/vue"
+import type { Exercise, ExerciseMcqData } from "utils/types"
 import { reportExerciseAttempt } from "oj/api"
 import { useUserStore } from "shared/store/user"
 
@@ -11,10 +12,33 @@ const ExercisePredict = defineAsyncComponent(() => import("./ExercisePredict.vue
 const ExerciseDebug = defineAsyncComponent(() => import("./ExerciseDebug.vue"))
 const ExerciseGroup = defineAsyncComponent(() => import("./ExerciseGroup.vue"))
 
-const props = defineProps<{ exercise: Exercise; lang?: string }>()
+const props = defineProps<{
+  exercise: Exercise
+  lang?: string
+  /** 这一课的第几道、一共几道 */
+  index: number
+  total: number
+  /** 做对过（以前做对的，或者刚才做对的） */
+  solved: boolean
+}>()
+const emit = defineEmits<{ solved: [exerciseId: number] }>()
 
 const userStore = useUserStore()
 
+const KIND: Record<string, string> = {
+  sort: "代码排序",
+  fill: "代码填空",
+  match: "连线匹配",
+  predict: "输出预测",
+  debug: "代码找错",
+  group: "归类分组",
+}
+
+const kind = computed(() => {
+  if (props.exercise.type !== "mcq") return KIND[props.exercise.type] ?? "练习"
+  return (props.exercise.data as ExerciseMcqData).answer.length === 1 ? "单选题" : "多选题"
+})
+
 /**
  * 七种题型各自判完对错后都往上抛 attempt，留痕只在这里做一次 ——
  * 每个题型组件里各写一遍上报，早晚会漏掉一两个。
@@ -36,6 +60,8 @@ watch(
 )
 
 function onAttempt(payload: { correct: boolean; answer?: string }) {
+  // 做对了就告诉页面（目录、大纲、课末的进度跟着变），没登录也算 —— 只是不留痕
+  if (payload.correct) emit("solved", props.exercise.id)
   if (!userStore.isAuthed || solved) return
   const answer = payload.answer ?? ""
   if (answer === lastAnswer) return
@@ -46,31 +72,95 @@ function onAttempt(payload: { correct: boolean; answer?: string }) {
 </script>
 
 <template>
-  <ExerciseMcq v-if="exercise.type === 'mcq'" :exercise="exercise" @attempt="onAttempt" />
-  <ExerciseSort
-    v-else-if="exercise.type === 'sort'"
-    :exercise="exercise"
-    :lang="lang"
-    @attempt="onAttempt"
-  />
-  <ExerciseFill
-    v-else-if="exercise.type === 'fill'"
-    :exercise="exercise"
-    :lang="lang"
-    @attempt="onAttempt"
-  />
-  <ExerciseMatch v-else-if="exercise.type === 'match'" :exercise="exercise" @attempt="onAttempt" />
-  <ExercisePredict
-    v-else-if="exercise.type === 'predict'"
-    :exercise="exercise"
-    :lang="lang"
-    @attempt="onAttempt"
-  />
-  <ExerciseDebug
-    v-else-if="exercise.type === 'debug'"
-    :exercise="exercise"
-    :lang="lang"
-    @attempt="onAttempt"
-  />
-  <ExerciseGroup v-else-if="exercise.type === 'group'" :exercise="exercise" @attempt="onAttempt" />
+  <section class="exercise" :id="`exercise-${exercise.id}`">
+    <header class="head">
+      <span class="tag">练一练</span>
+      <span class="kind">{{ kind }}</span>
+      <span class="grow" />
+      <span v-if="solved" class="done"><Icon icon="ph:check-bold" :width="13" />做对过</span>
+      <span class="num">第 {{ index }} 道 · 共 {{ total }} 道</span>
+    </header>
+    <ExerciseMcq v-if="exercise.type === 'mcq'" :exercise="exercise" @attempt="onAttempt" />
+    <ExerciseSort
+      v-else-if="exercise.type === 'sort'"
+      :exercise="exercise"
+      :lang="lang"
+      @attempt="onAttempt"
+    />
+    <ExerciseFill
+      v-else-if="exercise.type === 'fill'"
+      :exercise="exercise"
+      :lang="lang"
+      @attempt="onAttempt"
+    />
+    <ExerciseMatch
+      v-else-if="exercise.type === 'match'"
+      :exercise="exercise"
+      @attempt="onAttempt"
+    />
+    <ExercisePredict
+      v-else-if="exercise.type === 'predict'"
+      :exercise="exercise"
+      :lang="lang"
+      @attempt="onAttempt"
+    />
+    <ExerciseDebug
+      v-else-if="exercise.type === 'debug'"
+      :exercise="exercise"
+      :lang="lang"
+      @attempt="onAttempt"
+    />
+    <ExerciseGroup
+      v-else-if="exercise.type === 'group'"
+      :exercise="exercise"
+      @attempt="onAttempt"
+    />
+  </section>
 </template>
+
+<style scoped>
+.exercise {
+  margin: 0 0 18px;
+  padding: 16px 18px;
+  border: 1px solid var(--learn-line);
+  border-radius: 8px;
+  scroll-margin-top: 16px;
+}
+.head {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  margin-bottom: 10px;
+  font-size: 13px;
+}
+.tag {
+  height: 22px;
+  padding: 0 8px;
+  border-radius: 3px;
+  display: inline-flex;
+  align-items: center;
+  font-size: 12px;
+  font-weight: 600;
+  background: var(--learn-green-bg);
+  color: var(--learn-green-text);
+}
+.kind {
+  opacity: 0.6;
+}
+.grow {
+  flex: 1;
+}
+.done {
+  display: inline-flex;
+  align-items: center;
+  gap: 3px;
+  color: #18a058;
+  font-size: 12px;
+  font-weight: 600;
+}
+.num {
+  font-size: 12px;
+  opacity: 0.55;
+  font-variant-numeric: tabular-nums;
+}
+</style>
diff --git a/apps/web/src/oj/learn/components/LearnSummary.vue b/apps/web/src/oj/learn/components/LearnSummary.vue
deleted file mode 100644
index d58b4f8..0000000
--- a/apps/web/src/oj/learn/components/LearnSummary.vue
+++ /dev/null
@@ -1,49 +0,0 @@
-<script setup lang="ts">
-import { TUTORIAL_READ_SECONDS } from "@oj2/contract"
-import type { TutorialProgress } from "utils/types"
-
-const props = defineProps<{
-  titles: { id: number; title: string }[]
-  progress: Record<number, TutorialProgress>
-  traced: boolean
-}>()
-
-const stats = computed(() => {
-  const rows = props.titles.map((t) => props.progress[t.id])
-  const read = rows.filter((p) => p && p.totalSeconds >= TUTORIAL_READ_SECONDS).length
-  const solved = rows.reduce((n, p) => n + (p?.exerciseSolved ?? 0), 0)
-  const total = rows.reduce((n, p) => n + (p?.exerciseTotal ?? 0), 0)
-  return { read, solved, total }
-})
-
-const percent = computed(() =>
-  props.titles.length ? Math.round((stats.value.read / props.titles.length) * 100) : 0,
-)
-</script>
-
-<template>
-  <div v-if="traced && titles.length" class="summary">
-    <n-progress
-      type="line"
-      :percentage="percent"
-      :height="8"
-      :show-indicator="false"
-      status="success"
-    />
-    <n-text depth="3" class="numbers">
-      已读 {{ stats.read }}/{{ titles.length }} 课
-      <template v-if="stats.total"> · 练一练 {{ stats.solved }}/{{ stats.total }} </template>
-    </n-text>
-  </div>
-</template>
-
-<style scoped>
-.summary {
-  padding: 4px 10px 12px;
-}
-.numbers {
-  display: block;
-  margin-top: 6px;
-  font-size: 12px;
-}
-</style>
diff --git a/apps/web/src/oj/learn/components/LessonBody.vue b/apps/web/src/oj/learn/components/LessonBody.vue
index 97a7e8f..501b810 100644
--- a/apps/web/src/oj/learn/components/LessonBody.vue
+++ b/apps/web/src/oj/learn/components/LessonBody.vue
@@ -1,22 +1,87 @@
 <script setup lang="ts">
 import { MdPreview } from "md-editor-v3"
 import "md-editor-v3/lib/preview.css"
-import type { Segment } from "../composables/useExerciseParse"
+import type { LessonSegment } from "../composables/useLessonParse"
+import CodeRunBlock from "./CodeRunBlock.vue"
 
-defineProps<{ segments: Segment[]; lang?: string }>()
+const ExerciseWidget = defineAsyncComponent(() => import("./ExerciseWidget.vue"))
+
+/** 一课的正文：按 useLessonParse 拆好的段落逐段渲染 */
+defineProps<{
+  segments: LessonSegment[]
+  lang: "python" | "c"
+  tutorialId: number
+  exerciseCount: number
+  solvedIds: Set<number>
+}>()
+const emit = defineEmits<{ solved: [exerciseId: number] }>()
 
 const isDark = useDark()
-const ExerciseWidget = defineAsyncComponent(() => import("./ExerciseWidget.vue"))
 </script>
 
 <template>
-  <template v-for="(seg, i) in segments" :key="i">
-    <MdPreview
-      v-if="seg.type === 'md'"
-      preview-theme="vuepress"
-      :theme="isDark ? 'dark' : 'light'"
-      :model-value="seg.content"
-    />
-    <ExerciseWidget v-else :exercise="seg.exercise" :lang="lang" />
-  </template>
+  <div class="body">
+    <template v-for="(seg, i) in segments" :key="i">
+      <MdPreview
+        v-if="seg.type === 'md'"
+        preview-theme="vuepress"
+        :theme="isDark ? 'dark' : 'light'"
+        :model-value="seg.content"
+        class="md"
+      />
+      <h2 v-else-if="seg.type === 'heading'" :id="seg.id" class="h2">{{ seg.text }}</h2>
+      <div v-else-if="seg.type === 'goals'" :id="seg.id" class="goals">
+        <div class="goals-title">学完这课你能</div>
+        <div v-for="item in seg.items" :key="item">· {{ item.replace(/`/g, "") }}</div>
+      </div>
+      <CodeRunBlock
+        v-else-if="seg.type === 'code'"
+        :code="seg.code"
+        :lang="seg.lang"
+        :tutorial-id="tutorialId"
+      />
+      <ExerciseWidget
+        v-else
+        :exercise="seg.exercise"
+        :lang="lang"
+        :index="seg.index + 1"
+        :total="exerciseCount"
+        :solved="solvedIds.has(seg.exercise.id)"
+        @solved="emit('solved', $event)"
+      />
+    </template>
+  </div>
 </template>
+
+<style scoped>
+.body {
+  font-size: 15px;
+  line-height: 1.85;
+}
+.md :deep(.md-editor-preview) {
+  font-size: 15px;
+  padding: 0;
+}
+.md :deep(.md-editor-preview-wrapper) {
+  padding: 0;
+}
+.h2 {
+  font-size: 20px;
+  line-height: 1.4;
+  margin: 28px 0 12px;
+  scroll-margin-top: 16px;
+}
+.goals {
+  margin: 4px 0 8px;
+  padding: 12px 16px;
+  border-radius: 6px;
+  background: var(--learn-soft);
+  font-size: 14px;
+  line-height: 1.8;
+  scroll-margin-top: 16px;
+}
+.goals-title {
+  font-weight: 700;
+  margin-bottom: 2px;
+}
+</style>
diff --git a/apps/web/src/oj/learn/components/LessonDot.vue b/apps/web/src/oj/learn/components/LessonDot.vue
new file mode 100644
index 0000000..e8e6f2f
--- /dev/null
+++ b/apps/web/src/oj/learn/components/LessonDot.vue
@@ -0,0 +1,47 @@
+<script setup lang="ts">
+import { Icon } from "@iconify/vue"
+import type { LessonState } from "../lesson"
+
+/** 目录里每课前面的圆：学完打勾、在学橙圈、当前绿圈、没开始灰圈 */
+defineProps<{ step: number; state: LessonState; current?: boolean }>()
+</script>
+
+<template>
+  <span class="dot" :class="state === 'done' ? 'done' : current ? 'current' : state">
+    <Icon v-if="state === 'done'" icon="ph:check-bold" :width="13" />
+    <template v-else>{{ step }}</template>
+  </span>
+</template>
+
+<style scoped>
+.dot {
+  width: 24px;
+  height: 24px;
+  flex-shrink: 0;
+  box-sizing: border-box;
+  border-radius: 12px;
+  display: grid;
+  place-items: center;
+  font-size: 12px;
+  font-variant-numeric: tabular-nums;
+  border: 1.5px solid var(--learn-todo);
+  opacity: 0.9;
+}
+.done {
+  border: 0;
+  background: var(--learn-green);
+  color: #fff;
+  opacity: 1;
+}
+.started {
+  border: 2px solid var(--learn-orange);
+  color: var(--learn-orange-text);
+  font-weight: 600;
+}
+.current {
+  border: 2px solid var(--learn-green);
+  color: var(--learn-green-text);
+  font-weight: 700;
+  opacity: 1;
+}
+</style>
diff --git a/apps/web/src/oj/learn/components/LessonEnd.vue b/apps/web/src/oj/learn/components/LessonEnd.vue
new file mode 100644
index 0000000..43b84f9
--- /dev/null
+++ b/apps/web/src/oj/learn/components/LessonEnd.vue
@@ -0,0 +1,296 @@
+<script setup lang="ts">
+import { Icon } from "@iconify/vue"
+import type { TutorialProblem } from "@oj2/contract"
+import { splitTitle, type LessonState, type ProjectGroup } from "../lesson"
+import SegBar from "./SegBar.vue"
+
+/**
+ * 一课的结尾（设计稿「一课的结尾」）：练一练做到几道 → 全对就是「第 N 课学完了」→
+ * 老师挑的几道题 → 下一课。练一练没做完时下一课按钮是次要样式，不拦着。
+ */
+const props = defineProps<{
+  step: number
+  total: number
+  courseLabel: string
+  exerciseCount: number
+  solvedCount: number
+  /** 第一道还没做对的练一练，点了跳回去 */
+  firstUnsolved: { id: number; index: number } | null
+  problems: TutorialProblem[]
+  next: { title: string; to: string } | null
+  groups: ProjectGroup[]
+  stateOf: (id: number) => LessonState
+  doneCount: number
+  /** 窄屏：进度条短一点、题号挪到题目名下面 */
+  compact?: boolean
+}>()
+const emit = defineEmits<{ jump: [exerciseId: number] }>()
+
+const finished = computed(() => props.exerciseCount > 0 && props.solvedCount >= props.exerciseCount)
+const nextParts = computed(() => (props.next ? splitTitle(props.next.title) : null))
+</script>
+
+<template>
+  <div class="end">
+    <section v-if="finished" class="banner">
+      <span class="check"><Icon icon="ph:check-bold" :width="compact ? 22 : 24" /></span>
+      <div class="banner-text">
+        <span class="banner-title">第 {{ step }} 课学完了</span>
+        <div class="banner-progress">
+          <SegBar
+            :groups="groups"
+            :state-of="stateOf"
+            :width="compact ? 8 : 13"
+            :height="compact ? 5 : 6"
+            :gap="compact ? 2 : 3"
+            :group-gap="compact ? 5 : 8"
+          />
+          <span class="muted num"
+            >{{ compact ? "" : `${courseLabel} 学完 ` }}{{ doneCount }} / {{ total
+            }}{{ compact ? "" : " 课" }}</span
+          >
+        </div>
+      </div>
+    </section>
+    <section v-else-if="exerciseCount" class="card practice">
+      <span class="strong">练一练</span>
+      <span class="num">{{ solvedCount }} / {{ exerciseCount }}</span>
+      <span class="boxes">
+        <span v-for="n in exerciseCount" :key="n" class="box" :class="{ on: n <= solvedCount }" />
+      </span>
+      <span class="grow" />
+      <a v-if="firstUnsolved" href="#" class="link" @click.prevent="emit('jump', firstUnsolved.id)">
+        <Icon icon="ph:arrow-up-bold" :width="14" />第 {{ firstUnsolved.index }} 道还没做对
+      </a>
+    </section>
+
+    <section v-if="problems.length" class="card problems">
+      <div class="problems-head strong">去做几道题</div>
+      <router-link
+        v-for="problem in problems"
+        :key="problem.id"
+        :to="`/problem/${problem.displayId}`"
+        class="problem"
+      >
+        <span v-if="!compact" class="pid num">{{ problem.displayId }}</span>
+        <span class="ptitle">
+          <span class="ellipsis">{{ problem.title }}</span>
+          <span v-if="compact" class="sub">
+            <span class="num muted">{{ problem.displayId }}</span>
+            <span v-if="problem.mustDo" class="must">必会</span>
+          </span>
+        </span>
+        <span v-if="!compact && problem.mustDo" class="must">必会</span>
+        <span v-if="problem.solved" class="solved"
+          ><Icon icon="ph:check-bold" :width="13" />做对过</span
+        >
+        <span v-else class="go">去做<Icon icon="ph:caret-right-bold" :width="12" /></span>
+      </router-link>
+    </section>
+
+    <section v-if="next && nextParts" class="card next">
+      <div class="next-text">
+        <div class="muted small">下一课 · 第 {{ step + 1 }} 课</div>
+        <div class="next-title">
+          <span class="next-kp">{{ nextParts.kp }}</span>
+          <span v-if="nextParts.scene" class="muted">{{ nextParts.scene }}</span>
+        </div>
+      </div>
+      <n-button
+        :type="finished ? 'primary' : 'default'"
+        size="large"
+        icon-placement="right"
+        tag="a"
+        :href="next.to"
+        @click.prevent="$router.push(next.to)"
+      >
+        下一课
+        <template #icon><Icon icon="ph:caret-right-bold" /></template>
+      </n-button>
+    </section>
+  </div>
+</template>
+
+<style scoped>
+.end {
+  display: flex;
+  flex-direction: column;
+  gap: 16px;
+  margin: 28px 0 24px;
+}
+.card {
+  border: 1px solid var(--learn-line);
+  border-radius: 8px;
+}
+.strong {
+  font-weight: 700;
+  font-size: 15px;
+}
+.num {
+  font-variant-numeric: tabular-nums;
+}
+.muted {
+  opacity: 0.6;
+}
+.small {
+  font-size: 12px;
+}
+.grow {
+  flex: 1;
+}
+.banner {
+  border: 1px solid var(--learn-green-line);
+  background: var(--learn-green-bg);
+  border-radius: 10px;
+  padding: 18px 20px;
+  display: flex;
+  align-items: center;
+  gap: 16px;
+}
+.check {
+  width: 44px;
+  height: 44px;
+  border-radius: 22px;
+  flex-shrink: 0;
+  background: var(--learn-green);
+  color: #fff;
+  display: grid;
+  place-items: center;
+}
+.banner-text {
+  display: flex;
+  flex-direction: column;
+  gap: 6px;
+  min-width: 0;
+}
+.banner-title {
+  font-size: 19px;
+  font-weight: 700;
+}
+.banner-progress {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+  flex-wrap: wrap;
+  font-size: 13px;
+}
+.practice {
+  padding: 14px 18px;
+  display: flex;
+  align-items: center;
+  gap: 12px;
+  flex-wrap: wrap;
+}
+.boxes {
+  display: flex;
+  gap: 4px;
+}
+.box {
+  width: 34px;
+  height: 8px;
+  border-radius: 4px;
+  background: var(--learn-todo);
+}
+.box.on {
+  background: var(--learn-green);
+}
+.link {
+  display: inline-flex;
+  align-items: center;
+  gap: 4px;
+  font-size: 14px;
+  font-weight: 600;
+  color: var(--learn-green-text);
+  text-decoration: none;
+}
+.problems {
+  overflow: hidden;
+}
+.problems-head {
+  height: 46px;
+  padding: 0 16px;
+  display: flex;
+  align-items: center;
+}
+.problem {
+  min-height: 48px;
+  padding: 0 16px;
+  border-top: 1px solid var(--learn-line);
+  display: flex;
+  align-items: center;
+  gap: 12px;
+  color: inherit;
+  text-decoration: none;
+}
+.problem:hover {
+  background: var(--learn-soft);
+}
+.pid {
+  width: 40px;
+  font-size: 13px;
+  opacity: 0.6;
+}
+.ptitle {
+  flex: 1;
+  min-width: 0;
+  display: flex;
+  flex-direction: column;
+  font-size: 14px;
+  padding: 6px 0;
+}
+.ellipsis {
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+.sub {
+  display: flex;
+  align-items: center;
+  gap: 6px;
+  font-size: 12px;
+}
+.must {
+  height: 20px;
+  padding: 0 6px;
+  border-radius: 3px;
+  font-size: 12px;
+  display: inline-flex;
+  align-items: center;
+  background: var(--learn-orange-bg);
+  color: var(--learn-orange-text);
+  flex-shrink: 0;
+}
+.solved,
+.go {
+  width: 64px;
+  justify-content: flex-end;
+  flex-shrink: 0;
+  display: inline-flex;
+  align-items: center;
+  gap: 3px;
+  font-size: 13px;
+  font-weight: 600;
+  color: var(--learn-green-text);
+}
+.next {
+  padding: 16px 18px;
+  display: flex;
+  align-items: center;
+  gap: 14px;
+  flex-wrap: wrap;
+}
+.next-text {
+  flex: 1;
+  min-width: 0;
+}
+.next-title {
+  display: flex;
+  align-items: baseline;
+  gap: 10px;
+  flex-wrap: wrap;
+}
+.next-kp {
+  font-size: 17px;
+  font-weight: 700;
+}
+</style>
diff --git a/apps/web/src/oj/learn/components/LessonList.vue b/apps/web/src/oj/learn/components/LessonList.vue
deleted file mode 100644
index 8c0a298..0000000
--- a/apps/web/src/oj/learn/components/LessonList.vue
+++ /dev/null
@@ -1,124 +0,0 @@
-<script setup lang="ts">
-import { TUTORIAL_READ_SECONDS } from "@oj2/contract"
-import type { TutorialProgress } from "utils/types"
-
-const props = defineProps<{
-  titles: { id: number; title: string }[]
-  step: number
-  /** 按教程 id 索引的自学留痕，未登录时是空的 */
-  progress: Record<number, TutorialProgress>
-  /** 是否在留痕（登录了才留） */
-  traced: boolean
-}>()
-
-const emit = defineEmits<{ select: [lesson: number] }>()
-
-type Status = "todo" | "reading" | "done"
-
-/**
- * 三态：没打开过 / 读过但没读满或练习没做完 / 读满且练习全对。
- * 没有练习的课只看阅读；「已读」的门槛沿用契约的 TUTORIAL_READ_SECONDS。
- */
-function statusOf(id: number): Status {
-  const p = props.progress[id]
-  if (!p?.viewCount) return "todo"
-  const read = p.totalSeconds >= TUTORIAL_READ_SECONDS
-  const practiced = !p.exerciseTotal || p.exerciseSolved >= p.exerciseTotal
-  return read && practiced ? "done" : "reading"
-}
-
-function hint(id: number) {
-  const p = props.progress[id]
-  if (!p?.exerciseTotal) return ""
-  return `练一练 ${p.exerciseSolved}/${p.exerciseTotal}`
-}
-</script>
-
-<template>
-  <ol class="lessons">
-    <li
-      v-for="(item, index) in titles"
-      :key="item.id"
-      class="lesson"
-      :class="{ active: step === index + 1 }"
-      @click="emit('select', index + 1)"
-    >
-      <span class="dot" :class="traced ? statusOf(item.id) : 'todo'">
-        <template v-if="traced && statusOf(item.id) === 'done'">✓</template>
-        <template v-else>{{ index + 1 }}</template>
-      </span>
-      <span class="text">
-        <span class="title">{{ item.title }}</span>
-        <span v-if="traced && hint(item.id)" class="hint">
-          {{ hint(item.id) }}
-        </span>
-      </span>
-    </li>
-  </ol>
-  <n-text v-if="!traced" depth="3" class="login-tip"> 登录后可以记录学习进度 </n-text>
-</template>
-
-<style scoped>
-.lessons {
-  list-style: none;
-  margin: 0;
-  padding: 0;
-}
-.lesson {
-  display: flex;
-  align-items: center;
-  gap: 10px;
-  padding: 8px 10px;
-  border-radius: 8px;
-  cursor: pointer;
-  transition: background-color 0.15s;
-}
-.lesson:hover {
-  background: rgba(128, 128, 128, 0.12);
-}
-.lesson.active {
-  background: rgba(24, 160, 88, 0.14);
-}
-.dot {
-  flex: none;
-  width: 24px;
-  height: 24px;
-  border-radius: 50%;
-  display: grid;
-  place-items: center;
-  font-size: 12px;
-  border: 1.5px solid rgba(128, 128, 128, 0.5);
-}
-.dot.reading {
-  border-color: #f0a020;
-  color: #f0a020;
-}
-.dot.done {
-  border-color: #18a058;
-  background: #18a058;
-  color: #fff;
-}
-.active .dot.todo {
-  border-color: #18a058;
-  color: #18a058;
-}
-.text {
-  display: flex;
-  flex-direction: column;
-  min-width: 0;
-}
-.title {
-  line-height: 1.4;
-}
-.active .title {
-  font-weight: 600;
-}
-.hint {
-  font-size: 12px;
-  opacity: 0.6;
-}
-.login-tip {
-  display: block;
-  padding: 8px 10px;
-}
-</style>
diff --git a/apps/web/src/oj/learn/components/LessonOutline.vue b/apps/web/src/oj/learn/components/LessonOutline.vue
new file mode 100644
index 0000000..59f806c
--- /dev/null
+++ b/apps/web/src/oj/learn/components/LessonOutline.vue
@@ -0,0 +1,142 @@
+<script setup lang="ts">
+import { Icon } from "@iconify/vue"
+import type { OutlineItem } from "../composables/useLessonParse"
+
+/**
+ * 右边「这一课」：各节标题，有练一练的节后面挂一支笔（做对了再打个勾），
+ * 读到哪一节哪一节变绿。底下是这课练一练做到几道。
+ */
+const props = defineProps<{
+  items: OutlineItem[]
+  activeId: string
+  solvedIds: Set<number>
+  exerciseCount: number
+}>()
+const emit = defineEmits<{ jump: [id: string] }>()
+
+const solvedCount = computed(
+  () =>
+    props.items.flatMap((item) => item.exerciseIds).filter((id) => props.solvedIds.has(id)).length,
+)
+
+function allSolved(item: OutlineItem) {
+  return item.exerciseIds.every((id) => props.solvedIds.has(id))
+}
+</script>
+
+<template>
+  <nav class="outline" aria-label="这一课">
+    <div class="title">这一课</div>
+    <a
+      v-for="item in items"
+      :key="item.id"
+      :href="`#${item.id}`"
+      class="item"
+      :class="{ active: item.id === activeId }"
+      @click.prevent="emit('jump', item.id)"
+    >
+      <span class="mark" />
+      <span class="text">{{ item.text }}</span>
+      <span v-if="item.exerciseIds.length" class="ex" :class="{ ok: allSolved(item) }">
+        <Icon icon="ph:pencil-simple" :width="12" />
+        <Icon v-if="allSolved(item)" icon="ph:check-bold" :width="12" />
+      </span>
+    </a>
+    <div v-if="exerciseCount" class="practice">
+      <div class="practice-head">
+        <span>练一练</span>
+        <span class="num">{{ solvedCount }} / {{ exerciseCount }}</span>
+      </div>
+      <div class="boxes">
+        <span v-for="n in exerciseCount" :key="n" class="box" :class="{ on: n <= solvedCount }" />
+      </div>
+    </div>
+  </nav>
+</template>
+
+<style scoped>
+.outline {
+  display: flex;
+  flex-direction: column;
+}
+.title {
+  font-size: 12px;
+  font-weight: 700;
+  opacity: 0.55;
+  margin-bottom: 6px;
+}
+.item {
+  min-height: 32px;
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  font-size: 13px;
+  color: inherit;
+  text-decoration: none;
+  opacity: 0.85;
+}
+.item:hover {
+  opacity: 1;
+}
+.item.active {
+  color: var(--learn-green-text);
+  font-weight: 700;
+  opacity: 1;
+}
+.mark {
+  width: 6px;
+  height: 6px;
+  border-radius: 3px;
+  flex-shrink: 0;
+}
+.active .mark {
+  background: var(--learn-green);
+}
+.text {
+  flex: 1;
+  min-width: 0;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+.ex {
+  display: inline-flex;
+  gap: 1px;
+  opacity: 0.5;
+}
+.ex.ok {
+  opacity: 1;
+  color: var(--learn-green-text);
+}
+.practice {
+  margin-top: 18px;
+  padding-top: 14px;
+  border-top: 1px solid var(--learn-line);
+}
+.practice-head {
+  display: flex;
+  gap: 6px;
+  font-size: 13px;
+  font-weight: 600;
+  margin-bottom: 8px;
+}
+.num {
+  font-weight: 400;
+  opacity: 0.6;
+  font-variant-numeric: tabular-nums;
+}
+.boxes {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 4px;
+}
+.box {
+  width: 28px;
+  height: 8px;
+  border-radius: 4px;
+  background: var(--learn-todo);
+}
+.box.on {
+  background: var(--learn-green);
+}
+</style>
diff --git a/apps/web/src/oj/learn/components/LessonRow.vue b/apps/web/src/oj/learn/components/LessonRow.vue
new file mode 100644
index 0000000..28bea57
--- /dev/null
+++ b/apps/web/src/oj/learn/components/LessonRow.vue
@@ -0,0 +1,89 @@
+<script setup lang="ts">
+import type { TutorialProgress } from "@oj2/contract"
+import { lessonState, splitTitle } from "../lesson"
+import LessonDot from "./LessonDot.vue"
+
+/** 一课一行：圆点 + 知识点（粗）+ 情境（小字），在学的课右边带练一练做到几道 */
+const props = defineProps<{
+  title: string
+  step: number
+  to: string
+  progress?: TutorialProgress
+  active?: boolean
+  /** 行高，首页 48、目录 46、手机 50 */
+  height?: number
+}>()
+const emit = defineEmits<{ go: [] }>()
+
+const parts = computed(() => splitTitle(props.title))
+const state = computed(() => lessonState(props.progress))
+</script>
+
+<template>
+  <router-link
+    :to="to"
+    class="row"
+    :class="{ active }"
+    :style="{ height: `${height ?? 46}px` }"
+    @click="emit('go')"
+  >
+    <LessonDot :step="step" :state="state" :current="active" />
+    <span class="text">
+      <span class="kp">{{ parts.kp }}</span>
+      <span v-if="parts.scene" class="scene">{{ parts.scene }}</span>
+    </span>
+    <span v-if="state === 'started' && progress?.exerciseTotal" class="count">
+      {{ progress.exerciseSolved }}/{{ progress.exerciseTotal }}
+    </span>
+  </router-link>
+</template>
+
+<style scoped>
+.row {
+  box-sizing: border-box;
+  padding: 0 10px;
+  border-radius: 6px;
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  color: inherit;
+  text-decoration: none;
+}
+.row:hover {
+  background: var(--learn-soft);
+}
+.row.active {
+  background: var(--learn-green-bg);
+}
+.text {
+  display: flex;
+  flex-direction: column;
+  min-width: 0;
+  flex: 1;
+}
+.kp,
+.scene {
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+.kp {
+  font-size: 14px;
+  line-height: 20px;
+  font-weight: 500;
+}
+.active .kp {
+  font-weight: 700;
+}
+.scene {
+  font-size: 12px;
+  line-height: 16px;
+  opacity: 0.55;
+}
+.count {
+  flex-shrink: 0;
+  font-size: 12px;
+  color: var(--learn-orange-text);
+  font-variant-numeric: tabular-nums;
+}
+</style>
diff --git a/apps/web/src/oj/learn/components/PagerBar.vue b/apps/web/src/oj/learn/components/PagerBar.vue
deleted file mode 100644
index b0c0425..0000000
--- a/apps/web/src/oj/learn/components/PagerBar.vue
+++ /dev/null
@@ -1,36 +0,0 @@
-<script setup lang="ts">
-import { useThemeVars } from "naive-ui"
-
-defineProps<{ step: number; total: number }>()
-const theme = useThemeVars()
-const emit = defineEmits<{ go: [lesson: number] }>()
-</script>
-
-<template>
-  <nav class="pager" :style="{ background: theme.bodyColor }">
-    <n-button secondary :disabled="step <= 1" @click="emit('go', step - 1)"> ← 上一课 </n-button>
-    <n-text depth="3">{{ step }} / {{ total }}</n-text>
-    <n-button
-      type="primary"
-      :secondary="step >= total"
-      :disabled="step >= total"
-      @click="emit('go', step + 1)"
-    >
-      下一课 →
-    </n-button>
-  </nav>
-</template>
-
-<style scoped>
-.pager {
-  display: flex;
-  align-items: center;
-  justify-content: space-between;
-  gap: 12px;
-  padding: 12px 0;
-  margin-top: 16px;
-  position: sticky;
-  bottom: 0;
-  border-top: 1px solid rgba(128, 128, 128, 0.2);
-}
-</style>
diff --git a/apps/web/src/oj/learn/components/ProjectTile.vue b/apps/web/src/oj/learn/components/ProjectTile.vue
new file mode 100644
index 0000000..b21ac2e
--- /dev/null
+++ b/apps/web/src/oj/learn/components/ProjectTile.vue
@@ -0,0 +1,59 @@
+<script setup lang="ts">
+import { Icon } from "@iconify/vue"
+import type { ProjectGroup } from "../lesson"
+
+/** 项目的小方块图标：智能家居一个房子、智慧农业一片叶子…… */
+defineProps<{ icon: string; tone: ProjectGroup["tone"]; size?: number }>()
+</script>
+
+<template>
+  <span
+    class="tile"
+    :class="tone"
+    :style="{ width: `${size ?? 36}px`, height: `${size ?? 36}px` }"
+    aria-hidden="true"
+  >
+    <Icon :icon="icon" :width="Math.round((size ?? 36) * 0.55)" />
+  </span>
+</template>
+
+<style scoped>
+.tile {
+  flex-shrink: 0;
+  border-radius: 8px;
+  display: grid;
+  place-items: center;
+}
+.blue {
+  background: rgba(32, 128, 240, 0.12);
+  color: #1d5bb5;
+}
+.purple {
+  background: rgba(114, 46, 209, 0.1);
+  color: #5b3fa8;
+}
+.green {
+  background: rgba(24, 160, 88, 0.12);
+  color: #0c6b3b;
+}
+.orange {
+  background: rgba(240, 160, 32, 0.16);
+  color: #8a5200;
+}
+.gray {
+  background: rgba(128, 128, 128, 0.12);
+  color: inherit;
+}
+html.dark .blue {
+  color: #70c0e8;
+}
+html.dark .purple {
+  color: #b9a2f0;
+}
+html.dark .green {
+  color: #63e2b7;
+}
+html.dark .orange {
+  color: #f2c97d;
+}
+</style>
diff --git a/apps/web/src/oj/learn/components/ProjectTree.vue b/apps/web/src/oj/learn/components/ProjectTree.vue
new file mode 100644
index 0000000..98c6fde
--- /dev/null
+++ b/apps/web/src/oj/learn/components/ProjectTree.vue
@@ -0,0 +1,178 @@
+<script setup lang="ts">
+import { Icon } from "@iconify/vue"
+import type { TutorialProgress } from "@oj2/contract"
+import { lessonPath, lessonState, type ProjectGroup, type TutorialType } from "../lesson"
+import LessonRow from "./LessonRow.vue"
+import ProjectTile from "./ProjectTile.vue"
+
+/**
+ * 目录：按项目折叠，默认只展开正在学的那个项目（设计稿 A 的左栏、手机的目录抽屉）。
+ * `big` 是手机那版：项目行高一些、带图标。
+ */
+const props = defineProps<{
+  groups: ProjectGroup[]
+  progress: Record<number, TutorialProgress>
+  type: TutorialType
+  currentStep: number
+  big?: boolean
+}>()
+const emit = defineEmits<{ go: [] }>()
+
+const open = ref(new Set<string>())
+
+function keyOf(group: ProjectGroup) {
+  return `${group.project}:${group.lessons[0]!.id}`
+}
+
+// 换课换到别的项目时，把那个项目也展开（别的已经展开的不收）
+watch(
+  () => [props.groups, props.currentStep] as const,
+  ([groups, step]) => {
+    const group = groups.find((item) => item.lessons.some((lesson) => lesson.step === step))
+    if (group) open.value = new Set([...open.value, keyOf(group)])
+  },
+  { immediate: true },
+)
+
+function toggle(group: ProjectGroup) {
+  const next = new Set(open.value)
+  const key = keyOf(group)
+  if (next.has(key)) next.delete(key)
+  else next.add(key)
+  open.value = next
+}
+
+function doneIn(group: ProjectGroup) {
+  return group.lessons.filter((lesson) => lessonState(props.progress[lesson.id]) === "done").length
+}
+</script>
+
+<template>
+  <div class="tree" :class="{ big }">
+    <template v-for="group in groups" :key="keyOf(group)">
+      <button type="button" class="group" @click="toggle(group)">
+        <ProjectTile v-if="big" :icon="group.icon" :tone="group.tone" :size="30" />
+        <span v-else class="chev">
+          <Icon
+            :icon="open.has(keyOf(group)) ? 'ph:caret-down-bold' : 'ph:caret-right-bold'"
+            :width="13"
+          />
+        </span>
+        <span class="name">
+          <span v-if="big && group.no" class="no">{{ group.no }}</span>
+          <span class="label">
+            <span v-if="!big && group.no" class="no-inline">{{ group.no.slice(2) }}</span>
+            {{ group.name }}
+          </span>
+        </span>
+        <span v-if="doneIn(group) === group.lessons.length" class="count all">
+          <Icon icon="ph:check-bold" :width="12" />{{ doneIn(group) }}/{{ group.lessons.length }}
+        </span>
+        <span v-else class="count">{{ doneIn(group) }}/{{ group.lessons.length }}</span>
+        <span v-if="big" class="chev">
+          <Icon
+            :icon="open.has(keyOf(group)) ? 'ph:caret-down-bold' : 'ph:caret-right-bold'"
+            :width="14"
+          />
+        </span>
+      </button>
+      <div v-if="open.has(keyOf(group))" class="lessons">
+        <LessonRow
+          v-for="lesson in group.lessons"
+          :key="lesson.id"
+          :title="lesson.title"
+          :step="lesson.step"
+          :to="lessonPath(type, lesson.step)"
+          :progress="progress[lesson.id]"
+          :active="lesson.step === currentStep"
+          :height="big ? 50 : 46"
+          @go="emit('go')"
+        />
+      </div>
+    </template>
+  </div>
+</template>
+
+<style scoped>
+.tree {
+  display: flex;
+  flex-direction: column;
+  gap: 2px;
+}
+.group {
+  height: 36px;
+  padding: 0 8px;
+  border: 0;
+  border-radius: 6px;
+  background: transparent;
+  color: inherit;
+  font: inherit;
+  display: flex;
+  align-items: center;
+  gap: 6px;
+  cursor: pointer;
+  text-align: left;
+}
+.group:hover {
+  background: var(--learn-soft);
+}
+.big .group {
+  height: 52px;
+  gap: 10px;
+  border-top: 1px solid var(--learn-line);
+  border-radius: 0;
+}
+.chev {
+  display: flex;
+  opacity: 0.5;
+}
+.name {
+  flex: 1;
+  min-width: 0;
+  display: flex;
+  flex-direction: column;
+}
+.label {
+  font-size: 13px;
+  font-weight: 600;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+.big .label {
+  font-size: 14px;
+  font-weight: 700;
+}
+.no {
+  font-size: 11px;
+  opacity: 0.55;
+}
+.no-inline {
+  font-weight: 400;
+  opacity: 0.5;
+  margin-right: 6px;
+}
+.count {
+  flex-shrink: 0;
+  font-size: 12px;
+  opacity: 0.6;
+  font-variant-numeric: tabular-nums;
+  display: inline-flex;
+  align-items: center;
+  gap: 3px;
+}
+.count.all {
+  opacity: 1;
+  color: var(--learn-green-text);
+  font-weight: 600;
+}
+.lessons {
+  display: flex;
+  flex-direction: column;
+  gap: 2px;
+  padding-left: 6px;
+}
+.big .lessons {
+  padding: 0 0 8px;
+}
+</style>
diff --git a/apps/web/src/oj/learn/components/SegBar.vue b/apps/web/src/oj/learn/components/SegBar.vue
new file mode 100644
index 0000000..c9d022a
--- /dev/null
+++ b/apps/web/src/oj/learn/components/SegBar.vue
@@ -0,0 +1,64 @@
+<script setup lang="ts">
+import type { LessonState, ProjectGroup } from "../lesson"
+
+/**
+ * 一门课的进度条：一课一小段，按项目分组隔开。绿 = 学完，橙 = 在学，灰 = 没开始，
+ * 当前这课描一圈。
+ */
+defineProps<{
+  groups: ProjectGroup[]
+  stateOf: (id: number) => LessonState
+  current?: number
+  /** 每段的宽、高 */
+  width?: number
+  height?: number
+  gap?: number
+  groupGap?: number
+}>()
+</script>
+
+<template>
+  <div class="seg" :style="{ gap: `${groupGap ?? 10}px` }" aria-hidden="true">
+    <div
+      v-for="group in groups"
+      :key="group.lessons[0]!.id"
+      class="group"
+      :style="{ gap: `${gap ?? 3}px` }"
+    >
+      <span
+        v-for="lesson in group.lessons"
+        :key="lesson.id"
+        class="cell"
+        :class="[stateOf(lesson.id), { current: lesson.id === current }]"
+        :style="{
+          width: `${width ?? 20}px`,
+          height: `${height ?? 6}px`,
+          borderRadius: `${(height ?? 6) / 2}px`,
+        }"
+      />
+    </div>
+  </div>
+</template>
+
+<style scoped>
+.seg,
+.group {
+  display: flex;
+  align-items: center;
+  flex-wrap: wrap;
+}
+.cell {
+  flex-shrink: 0;
+  background: var(--learn-todo);
+}
+.cell.done {
+  background: var(--learn-green);
+}
+.cell.started {
+  background: var(--learn-orange);
+}
+.cell.current {
+  outline: 2px solid var(--learn-green-text);
+  outline-offset: 1px;
+}
+</style>
diff --git a/apps/web/src/oj/learn/composables/useExerciseParse.ts b/apps/web/src/oj/learn/composables/useExerciseParse.ts
deleted file mode 100644
index 635f3da..0000000
--- a/apps/web/src/oj/learn/composables/useExerciseParse.ts
+++ /dev/null
@@ -1,32 +0,0 @@
-import type { Exercise } from "utils/types"
-
-export type Segment = { type: "md"; content: string } | { type: "exercise"; exercise: Exercise }
-
-export function parseExercises(content: string, exercises: Exercise[]): Segment[] {
-  const exerciseMap = new Map(exercises.map((e) => [e.id, e]))
-  const segments: Segment[] = []
-  const regex = /\[\[exercise:(\d+)\]\]/g
-  let lastIndex = 0
-  let match: RegExpExecArray | null
-
-  while ((match = regex.exec(content)) !== null) {
-    if (match.index > lastIndex) {
-      segments.push({
-        type: "md",
-        content: content.slice(lastIndex, match.index),
-      })
-    }
-    const id = parseInt(match[1])
-    const exercise = exerciseMap.get(id)
-    if (exercise) {
-      segments.push({ type: "exercise", exercise })
-    }
-    lastIndex = regex.lastIndex
-  }
-
-  if (lastIndex < content.length) {
-    segments.push({ type: "md", content: content.slice(lastIndex) })
-  }
-
-  return segments
-}
diff --git a/apps/web/src/oj/learn/composables/useLessonParse.ts b/apps/web/src/oj/learn/composables/useLessonParse.ts
new file mode 100644
index 0000000..346a93b
--- /dev/null
+++ b/apps/web/src/oj/learn/composables/useLessonParse.ts
@@ -0,0 +1,158 @@
+import type { Exercise } from "utils/types"
+
+/**
+ * 把一课的 Markdown 正文拆成几段，各段交给不同的组件渲染：
+ *
+ * - `heading`：二级标题单独拿出来，自己出 id —— 右边「这一课」的大纲靠它跳转、高亮；
+ * - `goals`：「## 学习目标」那一节画成「学完这课你能」的方框；
+ * - `code`：带语言的代码块（```python / ```c）换成能改、能运行的代码块；
+ *   不带语言的（「输出结果」那种）留在 Markdown 里照常显示；
+ * - `exercise`：`[[exercise:36]]` 占位符换成练一练；
+ * - `md`：其余的交给 MdPreview。
+ *
+ * 正文开头的「# 标题」「**所属项目：…**」和紧跟着的项目配图不渲染：标题和项目页面上方
+ * 已经有了，每课都重复一张同样的项目图只是把正文往下推。
+ */
+export type LessonSegment =
+  | { type: "md"; content: string }
+  | { type: "heading"; id: string; text: string }
+  | { type: "goals"; id: string; items: string[] }
+  | { type: "code"; lang: "python" | "c"; code: string; index: number }
+  | { type: "exercise"; exercise: Exercise; index: number }
+
+/** 大纲里的一项：一个二级标题，挂着它这一节里的练一练 */
+export interface OutlineItem {
+  id: string
+  text: string
+  exerciseIds: number[]
+}
+
+const CODE_LANGS: Record<string, "python" | "c"> = {
+  python: "python",
+  py: "python",
+  python3: "python",
+  c: "c",
+  cpp: "c",
+  "c++": "c",
+}
+
+const EXERCISE_RE = /\[\[exercise:(\d+)\]\]/g
+const GOALS_TITLE = "学习目标"
+
+/** 去掉开头的标题、所属项目、项目配图（中间的空行一起） */
+function stripPreamble(lines: string[]) {
+  let i = 0
+  const skipBlank = () => {
+    while (i < lines.length && !lines[i]!.trim()) i++
+  }
+  skipBlank()
+  if (lines[i]?.startsWith("# ")) i++
+  skipBlank()
+  if (/^\*\*所属项目[：:]/.test(lines[i]?.trim() ?? "")) {
+    i++
+    skipBlank()
+    if (/^!\[[^\]]*\]\([^)]*\)\s*$/.test(lines[i]?.trim() ?? "")) i++
+  }
+  return lines.slice(i)
+}
+
+export function parseLesson(content: string, exercises: Exercise[]) {
+  const byId = new Map(exercises.map((item) => [item.id, item]))
+  const segments: LessonSegment[] = []
+  const outline: OutlineItem[] = []
+  let md: string[] = []
+  let codeIndex = 0
+  let exerciseIndex = 0
+  let headingIndex = 0
+
+  const flush = () => {
+    const text = md.join("\n")
+    if (text.trim()) segments.push({ type: "md", content: text })
+    md = []
+  }
+
+  const lines = stripPreamble(content.replace(/\r\n/g, "\n").split("\n"))
+  let i = 0
+  while (i < lines.length) {
+    const line = lines[i]!
+    const fence = line.match(/^(\s*)(```+|~~~+)\s*([\w+#-]*)\s*$/)
+    if (fence) {
+      const marker = fence[2]!
+      const lang = CODE_LANGS[fence[3]!.toLowerCase()]
+      const body: string[] = []
+      let j = i + 1
+      while (j < lines.length && !lines[j]!.trim().startsWith(marker)) body.push(lines[j++]!)
+      if (lang) {
+        flush()
+        segments.push({ type: "code", lang, code: body.join("\n"), index: codeIndex++ })
+      } else {
+        md.push(line, ...body, lines[j] ?? marker)
+      }
+      i = j + 1
+      continue
+    }
+
+    const heading = line.match(/^##\s+(.+?)\s*#*\s*$/)
+    if (heading) {
+      flush()
+      const text = heading[1]!.trim()
+      const id = `section-${headingIndex++}`
+      if (text === GOALS_TITLE) {
+        // 学习目标：收到下一个分隔线或标题为止，只要列表项
+        const items: string[] = []
+        let j = i + 1
+        while (j < lines.length && !/^(---+|##\s)/.test(lines[j]!.trim())) {
+          const item = lines[j]!.match(/^\s*[-*+]\s+(.+)$/)
+          if (item) items.push(item[1]!.trim())
+          j++
+        }
+        segments.push({ type: "goals", id, items })
+        outline.push({ id, text: "学完这课你能", exerciseIds: [] })
+        i = j
+        continue
+      }
+      segments.push({ type: "heading", id, text })
+      outline.push({ id, text, exerciseIds: [] })
+      i++
+      continue
+    }
+
+    // 节与节之间的分隔线：二级标题本身就隔开了，再画一道线是重复
+    if (/^\s*(---+|\*\*\*+)\s*$/.test(line)) {
+      i++
+      continue
+    }
+
+    if (EXERCISE_RE.test(line)) {
+      EXERCISE_RE.lastIndex = 0
+      let last = 0
+      for (const match of line.matchAll(EXERCISE_RE)) {
+        md.push(line.slice(last, match.index))
+        last = match.index! + match[0].length
+        const exercise = byId.get(Number(match[1]))
+        if (!exercise) continue
+        flush()
+        segments.push({ type: "exercise", exercise, index: exerciseIndex++ })
+        outline[outline.length - 1]?.exerciseIds.push(exercise.id)
+      }
+      md.push(line.slice(last))
+      i++
+      continue
+    }
+
+    md.push(line)
+    i++
+  }
+  flush()
+
+  // 正文里没放占位符的练一练接在最后：学完一课要全做对，看不见的题会让这课永远学不完
+  const placed = new Set(
+    segments.flatMap((item) => (item.type === "exercise" ? [item.exercise.id] : [])),
+  )
+  for (const exercise of exercises) {
+    if (placed.has(exercise.id)) continue
+    segments.push({ type: "exercise", exercise, index: exerciseIndex++ })
+    outline[outline.length - 1]?.exerciseIds.push(exercise.id)
+  }
+  return { segments, outline, exerciseCount: exerciseIndex }
+}
diff --git a/apps/web/src/oj/learn/home.vue b/apps/web/src/oj/learn/home.vue
new file mode 100644
index 0000000..cac9104
--- /dev/null
+++ b/apps/web/src/oj/learn/home.vue
@@ -0,0 +1,575 @@
+<script setup lang="ts">
+import { Icon } from "@iconify/vue"
+import type { TutorialProgress, TutorialSummary } from "@oj2/contract"
+import { getLearnProgress, getTutorials } from "../api"
+import { useBreakpoints } from "shared/composables/breakpoints"
+import { useAuthModalStore } from "shared/store/authModal"
+import { useUserStore } from "shared/store/user"
+import {
+  COURSES,
+  continueStep,
+  doneCount,
+  groupByProject,
+  lessonPath,
+  lessonState,
+  splitProject,
+  splitTitle,
+  type TutorialType,
+} from "./lesson"
+import LessonRow from "./components/LessonRow.vue"
+import ProjectTile from "./components/ProjectTile.vue"
+import ProjectTree from "./components/ProjectTree.vue"
+import SegBar from "./components/SegBar.vue"
+import "./learn.css"
+
+/**
+ * 自学首页 /learn（设计稿「自学首页」）：最上面「接着学」，下面按项目分组的课程地图。
+ *
+ * 「接着学」看的是**服务端留痕**里最近打开的那一课，不是本机记的：机房一台电脑
+ * 轮着好几个班用，本地记的是上一个人学到哪。
+ */
+const userStore = useUserStore()
+const authModal = useAuthModalStore()
+const { isDesktop } = useBreakpoints()
+const route = useRoute()
+const router = useRouter()
+
+interface Course {
+  type: TutorialType
+  label: string
+  titles: TutorialSummary[]
+  progress: Record<number, TutorialProgress>
+}
+
+const courses = ref<Course[]>([])
+const loaded = ref(false)
+const tab = ref<TutorialType>(route.query.course === "c" ? "c" : "python")
+
+async function load() {
+  const authed = userStore.isAuthed
+  courses.value = await Promise.all(
+    COURSES.map(async ({ type, label }) => {
+      const [titles, rows] = await Promise.all([
+        getTutorials(type),
+        authed ? getLearnProgress(type).catch(() => []) : Promise.resolve([]),
+      ])
+      return {
+        type,
+        label,
+        titles,
+        progress: Object.fromEntries(rows.map((row) => [row.tutorialId, row])),
+      }
+    }),
+  )
+  // 没指定看哪门课时，打开最近在学的那门
+  if (!route.query.course && resume.value) tab.value = resume.value.course.type
+  loaded.value = true
+}
+
+function latestViewed(course: Course) {
+  return Object.values(course.progress).reduce<string>(
+    (acc, row) => (row.lastViewedAt && row.lastViewedAt > acc ? row.lastViewedAt : acc),
+    "",
+  )
+}
+
+/** 接着学：最近打开过的那门课里该接着学的那课 */
+const resume = computed(() => {
+  const started = courses.value
+    .filter((course) => course.titles.length && latestViewed(course))
+    .sort((a, b) => latestViewed(b).localeCompare(latestViewed(a)))
+  const course = started[0]
+  if (!course) return null
+  const step = continueStep(course.titles, course.progress)
+  if (!step) return null
+  const item = course.titles[step - 1]!
+  return { course, step, item, parts: splitTitle(item.title), project: splitProject(item.project) }
+})
+
+const others = computed(() =>
+  courses.value.filter(
+    (course) => course.titles.length && course.type !== resume.value?.course.type,
+  ),
+)
+const current = computed(() => courses.value.find((course) => course.type === tab.value))
+const groups = computed(() => groupByProject(current.value?.titles ?? []))
+
+function stateOf(course: Course) {
+  return (id: number) => lessonState(course.progress[id])
+}
+
+function firstLesson(course: Course) {
+  return course.titles[0] ? splitTitle(course.titles[0].title) : null
+}
+
+function courseStep(course: Course) {
+  return continueStep(course.titles, course.progress)
+}
+
+function pickTab(type: TutorialType) {
+  tab.value = type
+  router.replace({ query: { ...route.query, course: type } })
+}
+
+function doneIn(course: Course, ids: number[]) {
+  return ids.filter((id) => lessonState(course.progress[id]) === "done").length
+}
+
+watch(() => userStore.isAuthed, load)
+onMounted(load)
+</script>
+
+<template>
+  <div class="home">
+    <template v-if="loaded">
+      <!-- 第一排：接着学 + 另一门课；一课没学过就是两张「开始学」 -->
+      <div class="top" :class="{ two: !resume }">
+        <section v-if="resume" class="resume">
+          <div class="resume-main">
+            <div class="resume-meta">
+              <span class="resume-label">接着学</span>
+              <span class="muted">
+                {{ resume.course.label }}
+                <template v-if="resume.item.project"> · {{ resume.item.project }}</template>
+                · 第 {{ resume.step }} 课
+              </span>
+            </div>
+            <div class="resume-title">
+              <span class="resume-kp">{{ resume.parts.kp }}</span>
+              <span v-if="resume.parts.scene" class="resume-scene">{{ resume.parts.scene }}</span>
+            </div>
+            <div class="resume-progress">
+              <SegBar
+                :groups="groupByProject(resume.course.titles)"
+                :state-of="stateOf(resume.course)"
+                :current="resume.item.id"
+                :width="isDesktop ? 20 : 11"
+                :gap="isDesktop ? 3 : 2"
+                :group-gap="isDesktop ? 10 : 6"
+              />
+              <span class="num sec">
+                学完 {{ doneCount(resume.course.titles, resume.course.progress) }} /
+                {{ resume.course.titles.length }} 课
+              </span>
+            </div>
+          </div>
+          <n-button
+            type="primary"
+            size="large"
+            class="resume-go"
+            icon-placement="right"
+            @click="router.push(lessonPath(resume.course.type, resume.step))"
+          >
+            <template #icon><Icon icon="ph:caret-right-bold" /></template>
+            接着学
+          </n-button>
+        </section>
+
+        <!-- 手机上有了「接着学」就不再摆另一门课的卡，下面的页签切得到 -->
+        <section
+          v-for="course in resume
+            ? isDesktop
+              ? others
+              : []
+            : courses.filter((c) => c.titles.length)"
+          :key="course.type"
+          class="course card"
+        >
+          <div class="course-text">
+            <div class="course-head">
+              <span class="course-name">{{ course.label }}</span>
+              <span class="muted small">
+                {{ course.titles.length }} 课
+                <template v-if="resume">
+                  ·
+                  {{
+                    courseStep(course)
+                      ? `学完 ${doneCount(course.titles, course.progress)} 课`
+                      : "还没开始"
+                  }}</template
+                >
+                <template v-else> · {{ groupByProject(course.titles).length }} 个项目</template>
+              </span>
+            </div>
+            <div v-if="!resume && firstLesson(course)" class="first">
+              <span class="muted">第 1 课</span>
+              <span class="first-kp">{{ firstLesson(course)!.kp }}</span>
+              <span class="sec">{{ firstLesson(course)!.scene }}</span>
+            </div>
+            <SegBar
+              :groups="groupByProject(course.titles)"
+              :state-of="stateOf(course)"
+              :width="resume ? 12 : 14"
+            />
+            <router-link
+              v-if="resume"
+              :to="lessonPath(course.type, courseStep(course) ?? 1)"
+              class="course-link"
+            >
+              {{ courseStep(course) ? `接着学第 ${courseStep(course)} 课` : "从第 1 课开始" }}
+              <Icon icon="ph:caret-right-bold" :width="13" />
+            </router-link>
+          </div>
+          <n-button
+            v-if="!resume"
+            type="primary"
+            icon-placement="right"
+            @click="router.push(lessonPath(course.type, 1))"
+          >
+            <template #icon><Icon icon="ph:caret-right-bold" /></template>
+            开始学
+          </n-button>
+        </section>
+      </div>
+
+      <div class="tabs" role="tablist">
+        <button
+          v-for="course in courses.filter((c) => c.titles.length)"
+          :key="course.type"
+          type="button"
+          role="tab"
+          class="tab"
+          :class="{ on: tab === course.type }"
+          :aria-selected="tab === course.type"
+          @click="pickTab(course.type)"
+        >
+          {{ course.label }}
+          <span class="tab-sub">
+            {{
+              userStore.isAuthed && doneCount(course.titles, course.progress)
+                ? `学完 ${doneCount(course.titles, course.progress)}/${course.titles.length}`
+                : `${course.titles.length} 课`
+            }}
+          </span>
+        </button>
+        <span class="grow" />
+        <button
+          v-if="!userStore.isAuthed"
+          type="button"
+          class="login"
+          @click="authModal.openLoginModal()"
+        >
+          登录后记下学到哪
+        </button>
+      </div>
+
+      <div v-if="current && isDesktop" class="map">
+        <section v-for="group in groups" :key="group.lessons[0]!.id" class="project card">
+          <div class="project-head">
+            <ProjectTile :icon="group.icon" :tone="group.tone" />
+            <span class="project-name">
+              <span v-if="group.no" class="muted small">{{ group.no }}</span>
+              <span class="project-title">{{ group.name }}</span>
+            </span>
+            <span
+              v-if="
+                userStore.isAuthed &&
+                doneIn(
+                  current,
+                  group.lessons.map((l) => l.id),
+                ) === group.lessons.length
+              "
+              class="project-count all"
+            >
+              <Icon icon="ph:check-bold" :width="13" />{{ group.lessons.length }}/{{
+                group.lessons.length
+              }}
+            </span>
+            <span
+              v-else-if="
+                userStore.isAuthed &&
+                doneIn(
+                  current,
+                  group.lessons.map((l) => l.id),
+                )
+              "
+              class="project-count"
+            >
+              {{
+                doneIn(
+                  current,
+                  group.lessons.map((l) => l.id),
+                )
+              }}/{{ group.lessons.length }}
+            </span>
+            <span v-else class="project-count">{{ group.lessons.length }} 课</span>
+          </div>
+          <LessonRow
+            v-for="lesson in group.lessons"
+            :key="lesson.id"
+            :title="lesson.title"
+            :step="lesson.step"
+            :to="lessonPath(current.type, lesson.step)"
+            :progress="current.progress[lesson.id]"
+            :active="resume?.course.type === current.type && resume.step === lesson.step"
+            :height="48"
+          />
+        </section>
+      </div>
+      <ProjectTree
+        v-else-if="current"
+        :groups="groups"
+        :progress="current.progress"
+        :type="current.type"
+        :current-step="resume?.course.type === current.type ? resume.step : 0"
+        big
+      />
+      <n-empty
+        v-if="!courses.some((c) => c.titles.length)"
+        description="还没有公开的教程"
+        style="margin-top: 80px"
+      />
+    </template>
+    <n-spin v-else class="spin" />
+  </div>
+</template>
+
+<style scoped>
+.home {
+  max-width: 1286px;
+  margin: 0 auto;
+  display: flex;
+  flex-direction: column;
+  gap: 20px;
+}
+.muted {
+  opacity: 0.6;
+}
+.sec {
+  opacity: 0.8;
+}
+.small {
+  font-size: 13px;
+}
+.num {
+  font-variant-numeric: tabular-nums;
+}
+.grow {
+  flex: 1;
+}
+.spin {
+  display: flex;
+  justify-content: center;
+  margin-top: 80px;
+}
+.card {
+  border: 1px solid var(--learn-line);
+  border-radius: 8px;
+}
+.top {
+  display: grid;
+  grid-template-columns: minmax(0, 1fr) 380px;
+  gap: 20px;
+}
+.top.two {
+  grid-template-columns: repeat(2, minmax(0, 1fr));
+}
+.resume {
+  border: 1px solid var(--learn-green-line);
+  background: var(--learn-green-bg);
+  border-radius: 10px;
+  padding: 20px 26px;
+  display: flex;
+  align-items: center;
+  gap: 24px;
+}
+.resume-main {
+  flex: 1;
+  min-width: 0;
+  display: flex;
+  flex-direction: column;
+  gap: 6px;
+}
+.resume-meta {
+  display: flex;
+  gap: 8px;
+  font-size: 13px;
+  flex-wrap: wrap;
+}
+.resume-label {
+  color: var(--learn-green-text);
+  font-weight: 700;
+}
+.resume-title {
+  display: flex;
+  align-items: baseline;
+  gap: 12px;
+  flex-wrap: wrap;
+}
+.resume-kp {
+  font-size: 26px;
+  font-weight: 700;
+}
+.resume-scene {
+  font-size: 15px;
+  opacity: 0.8;
+}
+.resume-progress {
+  display: flex;
+  align-items: center;
+  gap: 14px;
+  flex-wrap: wrap;
+  margin-top: 6px;
+  font-size: 13px;
+}
+.course {
+  padding: 18px 22px;
+  display: flex;
+  align-items: center;
+  gap: 20px;
+}
+.course-text {
+  flex: 1;
+  min-width: 0;
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+}
+.course-head {
+  display: flex;
+  align-items: baseline;
+  gap: 8px;
+}
+.course-name {
+  font-size: 18px;
+  font-weight: 700;
+}
+.first {
+  display: flex;
+  gap: 6px;
+  font-size: 14px;
+  flex-wrap: wrap;
+}
+.first-kp {
+  font-weight: 600;
+}
+.course-link {
+  display: inline-flex;
+  align-items: center;
+  gap: 4px;
+  font-size: 14px;
+  font-weight: 600;
+  color: var(--learn-green-text);
+  text-decoration: none;
+}
+.tabs {
+  display: flex;
+  align-items: stretch;
+  gap: 24px;
+  height: 40px;
+  border-bottom: 1px solid var(--learn-line);
+}
+.tab {
+  border: 0;
+  border-bottom: 2px solid transparent;
+  margin-bottom: -1px;
+  background: transparent;
+  color: inherit;
+  font: inherit;
+  font-size: 15px;
+  display: flex;
+  align-items: center;
+  gap: 6px;
+  cursor: pointer;
+  padding: 0;
+}
+.tab.on {
+  color: var(--learn-green-text);
+  font-weight: 700;
+  border-bottom-color: var(--learn-green);
+}
+.tab-sub {
+  font-size: 13px;
+  font-weight: 400;
+  opacity: 0.6;
+}
+.login {
+  border: 0;
+  background: transparent;
+  color: var(--learn-green-text);
+  font: inherit;
+  font-size: 13px;
+  cursor: pointer;
+}
+.map {
+  display: grid;
+  grid-template-columns: repeat(4, minmax(0, 1fr));
+  gap: 16px;
+  align-items: start;
+}
+@media (max-width: 1180px) {
+  .map {
+    grid-template-columns: repeat(2, minmax(0, 1fr));
+  }
+  .top {
+    grid-template-columns: minmax(0, 1fr);
+  }
+}
+.project {
+  padding: 8px;
+  display: flex;
+  flex-direction: column;
+  gap: 2px;
+}
+.project-head {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  padding: 8px 8px 10px;
+}
+.project-name {
+  flex: 1;
+  min-width: 0;
+  display: flex;
+  flex-direction: column;
+}
+.project-title {
+  font-size: 15px;
+  font-weight: 700;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+.project-count {
+  font-size: 13px;
+  opacity: 0.6;
+  font-variant-numeric: tabular-nums;
+  display: inline-flex;
+  align-items: center;
+  gap: 3px;
+}
+.project-count.all {
+  opacity: 1;
+  color: var(--learn-green-text);
+  font-weight: 600;
+}
+
+@media (max-width: 768px) {
+  .home {
+    gap: 14px;
+  }
+  .top,
+  .top.two {
+    grid-template-columns: minmax(0, 1fr);
+    gap: 12px;
+  }
+  .resume {
+    flex-direction: column;
+    align-items: stretch;
+    gap: 10px;
+    padding: 14px 16px;
+  }
+  .resume-kp {
+    font-size: 22px;
+  }
+  .resume-go {
+    width: 100%;
+  }
+  .course {
+    padding: 14px 16px;
+  }
+  .tabs {
+    gap: 20px;
+  }
+}
+</style>
diff --git a/apps/web/src/oj/learn/index.vue b/apps/web/src/oj/learn/index.vue
index d412dce..72df816 100644
--- a/apps/web/src/oj/learn/index.vue
+++ b/apps/web/src/oj/learn/index.vue
@@ -1,129 +1,97 @@
-<template>
-  <div class="learn-container">
-    <template v-if="tutorial.id">
-      <!-- 桌面端：目录 | 正文（居中限宽） | 可收起的示例代码 -->
-      <div v-if="isDesktop" class="learn-layout" :class="{ 'with-code': codeOpen }">
-        <aside class="rail">
-          <LearnSummary :titles="titles" :progress="progress" :traced="traced" />
-          <LessonList
-            :titles="titles"
-            :step="step"
-            :progress="progress"
-            :traced="traced"
-            @select="goToLesson"
-          />
-        </aside>
-
-        <main class="reader">
-          <article class="reader-body">
-            <header class="lesson-head">
-              <n-text depth="3">第 {{ step }} / {{ titles.length }} 课</n-text>
-              <n-flex align="center" justify="space-between" :wrap="false">
-                <span />
-                <n-button v-if="tutorial.code" size="small" secondary @click="codeOpen = !codeOpen">
-                  {{ codeOpen ? "收起示例代码" : "展开示例代码" }}
-                </n-button>
-              </n-flex>
-            </header>
-            <LessonBody :segments="segments" :lang="tutorial.type" />
-          </article>
-          <PagerBar :step="step" :total="titles.length" @go="goToLesson" />
-        </main>
-
-        <aside v-if="tutorial.code && codeOpen" class="code-panel">
-          <CodeEditor :language="editorLanguage" v-model="tutorial.code" height="100%" />
-        </aside>
-      </div>
-
-      <!-- 手机端 -->
-      <template v-else>
-        <LearnSummary :titles="titles" :progress="progress" :traced="traced" />
-        <n-tabs type="line" animated v-model:value="activeTab">
-          <n-tab-pane name="catalog" tab="目录">
-            <LessonList
-              :titles="titles"
-              :step="step"
-              :progress="progress"
-              :traced="traced"
-              @select="goToLesson"
-            />
-          </n-tab-pane>
-          <n-tab-pane name="content" :tab="`第 ${step} 课`">
-            <LessonBody :segments="segments" :lang="tutorial.type" />
-          </n-tab-pane>
-          <n-tab-pane name="code" tab="示例代码" v-if="tutorial.code">
-            <CodeEditor :language="editorLanguage" v-model="tutorial.code" />
-          </n-tab-pane>
-        </n-tabs>
-        <PagerBar :step="step" :total="titles.length" @go="goToLesson" />
-      </template>
-    </template>
-
-    <n-empty v-if="isEmpty" description="该教程还没有公开" style="margin-top: 80px" />
-  </div>
-</template>
-
 <script setup lang="ts">
-import type { Tutorial, Exercise, LANGUAGE, TutorialProgress } from "utils/types"
-import { getTutorial, getTutorials, getExercises, getLearnProgress } from "../api"
-import { parseExercises } from "./composables/useExerciseParse"
+import { Icon } from "@iconify/vue"
+import { useThemeVars } from "naive-ui"
+import type { Tutorial, TutorialProgress, TutorialSummary } from "@oj2/contract"
+import type { Exercise } from "utils/types"
+import { getExercises, getLearnProgress, getTutorial, getTutorials } from "../api"
+import { parseLesson } from "./composables/useLessonParse"
 import { useLearnTrace } from "./composables/useLearnTrace"
 import { useBreakpoints } from "shared/composables/breakpoints"
-import { useLearnProgress } from "shared/composables/learnProgress"
 import { useUserStore } from "shared/store/user"
-import LessonList from "./components/LessonList.vue"
-import LearnSummary from "./components/LearnSummary.vue"
+import {
+  COURSES,
+  doneCount,
+  groupByProject,
+  lessonPath,
+  lessonState,
+  splitTitle,
+  type TutorialType,
+} from "./lesson"
 import LessonBody from "./components/LessonBody.vue"
-import PagerBar from "./components/PagerBar.vue"
-const CodeEditor = defineAsyncComponent(() => import("shared/components/CodeEditor.vue"))
+import LessonEnd from "./components/LessonEnd.vue"
+import LessonOutline from "./components/LessonOutline.vue"
+import ProjectTree from "./components/ProjectTree.vue"
+import SegBar from "./components/SegBar.vue"
+import "./learn.css"
 
+/**
+ * 读一课。设计稿「自学重设计」页的阅读页 A（选定）：左边目录按项目折叠、中间正文、
+ * 右边这一课的小节和练一练；手机上是顶部课程条 + 底部弹出的目录 + 底部上一课/下一课。
+ */
 const route = useRoute()
 const router = useRouter()
 const { isDesktop } = useBreakpoints()
-const { learnStep } = useLearnProgress()
 const userStore = useUserStore()
+const theme = useThemeVars()
 
-// 未登录也能看教程（学习页本来就不要求登录），只是不留痕
+// 未登录也能看教程，只是不留痕、不记进度
 const traced = computed(() => userStore.isAuthed)
 
+const type = computed<TutorialType>(() => (route.params.type === "c" ? "c" : "python"))
+const courseLabel = computed(() => COURSES.find((item) => item.type === type.value)!.label)
 const step = computed(() => {
-  const value = route.params.step as string | undefined
-  if (!value) return 1
-  return parseInt(value)
+  const value = parseInt((route.params.step as string | undefined) ?? "1")
+  return Number.isFinite(value) && value > 0 ? value : 1
 })
 
-const type = computed<"python" | "c">(() => (route.params.type === "c" ? "c" : "python"))
-
-const tutorial = ref<Partial<Tutorial>>({
-  id: 0,
-  title: "",
-  content: "",
-  code: "",
-})
-
-const editorLanguage = computed<LANGUAGE>(() => (tutorial.value.type === "c" ? "C" : "Python"))
-const titles = ref<{ id: number; title: string }[]>([])
+const titles = ref<TutorialSummary[]>([])
 const progress = ref<Record<number, TutorialProgress>>({})
+const tutorial = ref<Tutorial | null>(null)
 const exercises = ref<Exercise[]>([])
-const activeTab = ref("content")
-// 示例代码栏默认展开，收起后正文独占版面；偏好记在本机
-const codeOpen = useStorage("oj2:learn-code-open", true)
+const solvedIds = ref(new Set<number>())
+const loading = ref(true)
 const isEmpty = ref(false)
+const menuOpen = ref(false)
 
-const segments = computed(() => parseExercises(tutorial.value.content ?? "", exercises.value))
+const groups = computed(() => groupByProject(titles.value))
+const parsed = computed(() =>
+  tutorial.value
+    ? parseLesson(tutorial.value.content, exercises.value)
+    : { segments: [], outline: [], exerciseCount: 0 },
+)
+const parts = computed(() => splitTitle(tutorial.value?.title ?? ""))
+const solvedCount = computed(
+  () => exercises.value.filter((item) => solvedIds.value.has(item.id)).length,
+)
+const firstUnsolved = computed(() => {
+  for (const seg of parsed.value.segments) {
+    if (seg.type === "exercise" && !solvedIds.value.has(seg.exercise.id)) {
+      return { id: seg.exercise.id, index: seg.index + 1 }
+    }
+  }
+  return null
+})
+const prev = computed(() => lessonAt(step.value - 1))
+const next = computed(() => lessonAt(step.value + 1))
+const done = computed(() => doneCount(titles.value, progress.value))
+
+function lessonAt(at: number) {
+  const item = titles.value[at - 1]
+  return item ? { title: item.title, to: lessonPath(type.value, at) } : null
+}
+
+function stateOf(id: number) {
+  return lessonState(progress.value[id])
+}
 
 // 留痕的计时器。tutorial.id 变了才算换课 —— 用 step 会在内容还没加载好时就上报
 useLearnTrace(
-  computed(() => tutorial.value.id ?? 0),
+  computed(() => tutorial.value?.id ?? 0),
   traced,
 )
 
-function goToLesson(lessonNumber: number) {
-  activeTab.value = "content"
-  router.push(`/learn/${type.value}/${lessonNumber.toString().padStart(2, "0")}`)
-}
 /**
- * 拉自己的自学留痕，给目录打勾。失败就当没有 —— 目录少几个勾不影响上课，
+ * 拉自己的自学留痕，给目录打勾。失败就当没有 —— 目录少几个勾不影响学，
  * 但弹个错会把「我是不是没学」的焦虑塞给学生。
  */
 async function loadProgress() {
@@ -139,85 +107,489 @@ async function loadProgress() {
   }
 }
 
+let generation = 0
 async function init() {
-  const res1 = await getTutorials(type.value)
-  titles.value = res1
-  isEmpty.value = titles.value.length === 0
-  if (isEmpty.value) return
-  const id = titles.value[step.value - 1].id
-  const [res2, exs] = await Promise.allSettled([getTutorial(id), getExercises(id)])
-  if (res2.status === "fulfilled") tutorial.value = res2.value
+  const mine = ++generation
+  loading.value = true
+  menuOpen.value = false
+  const list = await getTutorials(type.value)
+  if (mine !== generation) return
+  titles.value = list
+  isEmpty.value = list.length === 0
+  if (isEmpty.value) {
+    loading.value = false
+    return
+  }
+  if (step.value > list.length) {
+    router.replace(lessonPath(type.value, list.length))
+    return
+  }
+  const id = list[step.value - 1]!.id
+  const [lesson, exs] = await Promise.allSettled([
+    getTutorial(id),
+    getExercises(id),
+    loadProgress(),
+  ])
+  if (mine !== generation) return
+  tutorial.value = lesson.status === "fulfilled" ? lesson.value : null
   exercises.value = exs.status === "fulfilled" ? exs.value : []
-  learnStep.value[type.value] = step.value
-  loadProgress()
+  solvedIds.value = new Set(exercises.value.filter((item) => item.solved).map((item) => item.id))
+  loading.value = false
+  activeId.value = ""
+  await nextTick()
+  reader.value?.scrollTo({ top: 0 })
+  if (!isDesktop.value) window.scrollTo({ top: 0 })
 }
 
 watch(
   () => [route.params.type, route.params.step],
-  async () => {
+  () => {
     if (route.name === "learn") init()
   },
   { immediate: true },
 )
 
-// 在教程页上登录/退出时把目录的勾重新拉一遍。学生多半是先点开教程、
-// 被弹窗拦下才登录的，不盯着这个的话勾要等他刷新页面才出现
-watch(traced, loadProgress)
+// 在教程页上登录/退出时把勾重新拉一遍（学生多半是点「运行」被拦下才登录的）
+watch(traced, async () => {
+  await loadProgress()
+  if (!tutorial.value) return
+  const exs = await getExercises(tutorial.value.id).catch(() => exercises.value)
+  exercises.value = exs
+  solvedIds.value = new Set([
+    ...solvedIds.value,
+    ...exs.filter((item) => item.solved).map((item) => item.id),
+  ])
+})
+
+/** 刚做对一道：本课的进度就地加上，目录、进度条、课末跟着变，不用等刷新 */
+function onSolved(exerciseId: number) {
+  if (solvedIds.value.has(exerciseId) || !tutorial.value) return
+  solvedIds.value = new Set([...solvedIds.value, exerciseId])
+  const id = tutorial.value.id
+  const row = progress.value[id] ?? {
+    tutorialId: id,
+    viewCount: 1,
+    totalSeconds: 0,
+    firstViewedAt: null,
+    lastViewedAt: null,
+    exerciseTotal: exercises.value.length,
+    exerciseSolved: 0,
+  }
+  progress.value = { ...progress.value, [id]: { ...row, exerciseSolved: solvedCount.value } }
+}
+
+// ------------------------------------------------------------------ 读到哪一节
+const reader = ref<HTMLElement | null>(null)
+const activeId = ref("")
+
+function onScroll() {
+  const box = reader.value
+  if (!box) return
+  const top = box.getBoundingClientRect().top + 160
+  let current = parsed.value.outline[0]?.id ?? ""
+  for (const item of parsed.value.outline) {
+    const el = document.getElementById(item.id)
+    if (el && el.getBoundingClientRect().top <= top) current = item.id
+  }
+  activeId.value = current
+}
+
+function jump(id: string) {
+  document.getElementById(id)?.scrollIntoView({ behavior: "smooth", block: "start" })
+}
+
+function jumpExercise(id: number) {
+  jump(`exercise-${id}`)
+}
 </script>
 
+<template>
+  <div class="learn">
+    <n-empty v-if="isEmpty" description="这门课还没有公开的课" style="margin-top: 80px" />
+
+    <!-- 桌面：目录 | 正文 | 这一课 -->
+    <div v-else-if="isDesktop" class="layout">
+      <aside class="rail">
+        <router-link to="/learn" class="back">
+          <Icon icon="ph:caret-left-bold" :width="13" />自学首页
+        </router-link>
+        <div class="course">
+          <div class="course-head">
+            <span class="course-name">{{ courseLabel }}</span>
+            <span v-if="traced" class="muted num">学完 {{ done }} / {{ titles.length }}</span>
+          </div>
+          <SegBar
+            :groups="groups"
+            :state-of="stateOf"
+            :current="tutorial?.id"
+            :width="9"
+            :height="5"
+            :gap="2"
+            :group-gap="6"
+          />
+        </div>
+        <ProjectTree :groups="groups" :progress="progress" :type="type" :current-step="step" />
+        <div v-if="!traced" class="login-tip muted">登录后记下学到哪</div>
+      </aside>
+
+      <main class="main">
+        <div ref="reader" class="reader" @scroll.passive="onScroll">
+          <article v-if="tutorial" class="article">
+            <div class="crumb muted">
+              <span v-if="tutorial.project">{{ tutorial.project }}</span>
+              <span v-if="tutorial.project">·</span>
+              <span class="num">第 {{ step }} / {{ titles.length }} 课</span>
+            </div>
+            <h1 class="h1">{{ parts.kp }}</h1>
+            <div v-if="parts.scene" class="scene">{{ parts.scene }}</div>
+            <LessonBody
+              :segments="parsed.segments"
+              :lang="type"
+              :tutorial-id="tutorial.id"
+              :exercise-count="parsed.exerciseCount"
+              :solved-ids="solvedIds"
+              @solved="onSolved"
+            />
+            <LessonEnd
+              :step="step"
+              :total="titles.length"
+              :course-label="courseLabel"
+              :exercise-count="parsed.exerciseCount"
+              :solved-count="solvedCount"
+              :first-unsolved="firstUnsolved"
+              :problems="tutorial.problems"
+              :next="next"
+              :groups="groups"
+              :state-of="stateOf"
+              :done-count="done"
+              @jump="jumpExercise"
+            />
+          </article>
+          <n-spin v-else-if="loading" class="spin" />
+        </div>
+        <nav class="pager">
+          <div class="pager-inner">
+            <n-button v-if="prev" tag="a" :href="prev.to" @click.prevent="router.push(prev.to)">
+              <template #icon><Icon icon="ph:caret-left-bold" /></template>
+              上一课<span class="pager-name muted">{{ splitTitle(prev.title).kp }}</span>
+            </n-button>
+            <span class="grow" />
+            <n-button
+              v-if="next"
+              type="primary"
+              icon-placement="right"
+              tag="a"
+              :href="next.to"
+              @click.prevent="router.push(next.to)"
+            >
+              <template #icon><Icon icon="ph:caret-right-bold" /></template>
+              下一课<span class="pager-name next-name">{{ splitTitle(next.title).kp }}</span>
+            </n-button>
+          </div>
+        </nav>
+      </main>
+
+      <aside class="side">
+        <LessonOutline
+          v-if="tutorial"
+          :items="parsed.outline"
+          :active-id="activeId || parsed.outline[0]?.id || ''"
+          :solved-ids="solvedIds"
+          :exercise-count="parsed.exerciseCount"
+          @jump="jump"
+        />
+      </aside>
+    </div>
+
+    <!-- 手机 -->
+    <div v-else class="mobile">
+      <div class="mbar">
+        <n-button @click="menuOpen = true">
+          <template #icon><Icon icon="ph:list" /></template>
+          目录
+        </n-button>
+        <span class="num muted-strong">第 {{ step }} / {{ titles.length }} 课</span>
+        <span class="grow" />
+        <span v-if="parsed.exerciseCount" class="mpractice">
+          <span>练一练</span>
+          <span class="mboxes">
+            <span
+              v-for="n in parsed.exerciseCount"
+              :key="n"
+              class="mbox"
+              :class="{ on: n <= solvedCount }"
+            />
+          </span>
+        </span>
+      </div>
+      <article v-if="tutorial" class="marticle">
+        <div v-if="tutorial.project" class="crumb muted">{{ tutorial.project }}</div>
+        <h1 class="h1 small">{{ parts.kp }}</h1>
+        <div v-if="parts.scene" class="scene">{{ parts.scene }}</div>
+        <LessonBody
+          :segments="parsed.segments"
+          :lang="type"
+          :tutorial-id="tutorial.id"
+          :exercise-count="parsed.exerciseCount"
+          :solved-ids="solvedIds"
+          @solved="onSolved"
+        />
+        <LessonEnd
+          :step="step"
+          :total="titles.length"
+          :course-label="courseLabel"
+          :exercise-count="parsed.exerciseCount"
+          :solved-count="solvedCount"
+          :first-unsolved="firstUnsolved"
+          :problems="tutorial.problems"
+          :next="next"
+          :groups="groups"
+          :state-of="stateOf"
+          :done-count="done"
+          compact
+          @jump="jumpExercise"
+        />
+      </article>
+      <n-spin v-else-if="loading" class="spin" />
+      <nav class="mpager">
+        <n-button v-if="prev" size="large" @click="router.push(prev.to)">
+          <template #icon><Icon icon="ph:caret-left-bold" /></template>
+          上一课
+        </n-button>
+        <span class="grow" />
+        <n-button size="large" quaternary @click="menuOpen = true">
+          <template #icon><Icon icon="ph:list" /></template>
+          目录
+        </n-button>
+        <span class="grow" />
+        <n-button
+          v-if="next"
+          size="large"
+          type="primary"
+          icon-placement="right"
+          @click="router.push(next.to)"
+        >
+          <template #icon><Icon icon="ph:caret-right-bold" /></template>
+          下一课
+        </n-button>
+      </nav>
+
+      <n-drawer v-model:show="menuOpen" placement="bottom" height="85%" class="sheet">
+        <n-drawer-content :native-scrollbar="false" closable>
+          <template #header>
+            <span class="sheet-head">
+              <span class="course-name">{{ courseLabel }}</span>
+              <span v-if="traced" class="muted num">学完 {{ done }} / {{ titles.length }}</span>
+              <router-link to="/learn" class="sheet-home">自学首页</router-link>
+            </span>
+          </template>
+          <ProjectTree
+            :groups="groups"
+            :progress="progress"
+            :type="type"
+            :current-step="step"
+            big
+            @go="menuOpen = false"
+          />
+        </n-drawer-content>
+      </n-drawer>
+    </div>
+  </div>
+</template>
+
 <style scoped>
-/* 桌面端固定高度，目录/正文/代码各自内部滚动；移动端交给页面整体滚动 */
-@media (min-width: 769px) {
-  .learn-container {
-    height: calc(100vh - 134px);
+.muted {
+  opacity: 0.6;
+}
+.num {
+  font-variant-numeric: tabular-nums;
+}
+.grow {
+  flex: 1;
+}
+.spin {
+  display: flex;
+  justify-content: center;
+  margin-top: 80px;
+}
+
+/* 桌面端固定高度，三栏各自滚动 */
+.layout {
+  display: grid;
+  grid-template-columns: 260px minmax(0, 1fr) 220px;
+  grid-template-rows: minmax(0, 1fr);
+  height: calc(100vh - 134px);
+}
+@media (max-width: 1180px) {
+  .layout {
+    grid-template-columns: 240px minmax(0, 1fr);
+  }
+  .side {
+    display: none;
   }
 }
-
-.learn-layout {
-  display: grid;
-  grid-template-columns: 260px minmax(0, 1fr);
-  gap: 24px;
-  height: 100%;
-}
-.learn-layout.with-code {
-  grid-template-columns: 240px minmax(0, 1fr) minmax(360px, 40%);
-}
-
-.rail,
-.reader {
+.rail {
+  box-sizing: border-box;
+  border-right: 1px solid var(--learn-line);
+  padding: 0 12px 16px 0;
   overflow-y: auto;
-  height: 100%;
+  display: flex;
+  flex-direction: column;
+  gap: 4px;
 }
-.reader {
+.back {
+  display: inline-flex;
+  align-items: center;
+  gap: 2px;
+  font-size: 13px;
+  padding: 0 8px;
+  color: var(--learn-green-text);
+  text-decoration: none;
+}
+.course {
+  padding: 10px 8px 12px;
+}
+.course-head {
+  display: flex;
+  align-items: baseline;
+  gap: 8px;
+  margin-bottom: 8px;
+  font-size: 13px;
+}
+.course-name {
+  font-size: 17px;
+  font-weight: 700;
+}
+.login-tip {
+  font-size: 13px;
+  padding: 8px;
+}
+.main {
+  min-width: 0;
   display: flex;
   flex-direction: column;
 }
-.reader-body {
+.reader {
   flex: 1;
-  width: 100%;
-  max-width: 820px;
+  min-height: 0;
+  overflow-y: auto;
+  padding: 4px 40px 0;
+}
+.article {
+  max-width: 720px;
   margin: 0 auto;
 }
-.reader :deep(.pager) {
-  max-width: 820px;
-  width: 100%;
-  margin-left: auto;
-  margin-right: auto;
+.crumb {
+  display: flex;
+  gap: 8px;
+  font-size: 13px;
+  margin-bottom: 6px;
 }
-
-.lesson-head h1,
-.mobile-title {
-  margin: 4px 0 12px;
-  font-size: 26px;
+.h1 {
+  margin: 0;
+  font-size: 28px;
   line-height: 1.3;
 }
-.mobile-title {
-  font-size: 20px;
+.h1.small {
+  font-size: 24px;
+}
+.scene {
+  font-size: 15px;
+  opacity: 0.8;
+  margin: 4px 0 18px;
+}
+.pager {
+  flex-shrink: 0;
+  border-top: 1px solid var(--learn-line);
+  padding: 12px 40px;
+}
+.pager-inner {
+  max-width: 720px;
+  margin: 0 auto;
+  display: flex;
+  align-items: center;
+  gap: 12px;
+}
+.pager-name {
+  margin-left: 6px;
+  max-width: 220px;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+.next-name {
+  opacity: 0.85;
+}
+.side {
+  box-sizing: border-box;
+  padding: 24px 0 0 16px;
+  overflow-y: auto;
 }
 
-.code-panel {
-  height: 100%;
-  overflow: hidden;
-  border-radius: 8px;
+/* 手机 */
+/* 外层 n-layout 是 overflow: hidden，sticky 粘不住：顶部的条跟着滚走，
+   上一课 / 下一课（带目录按钮）固定在屏幕底部 */
+.mobile {
+  padding-bottom: 72px;
+}
+.mbar {
+  height: 48px;
+  margin: 0 -12px;
+  padding: 0 12px;
+  box-sizing: border-box;
+  border-bottom: 1px solid var(--learn-line);
+  background: v-bind("theme.bodyColor");
+  display: flex;
+  align-items: center;
+  gap: 8px;
+}
+.muted-strong {
+  font-size: 13px;
+  opacity: 0.8;
+}
+.mpractice {
+  display: flex;
+  align-items: center;
+  gap: 6px;
+  font-size: 12px;
+}
+.mboxes {
+  display: flex;
+  gap: 3px;
+}
+.mbox {
+  width: 14px;
+  height: 6px;
+  border-radius: 3px;
+  background: var(--learn-todo);
+}
+.mbox.on {
+  background: var(--learn-green);
+}
+.marticle {
+  padding-top: 16px;
+}
+.mpager {
+  position: fixed;
+  left: 0;
+  right: 0;
+  bottom: 0;
+  z-index: 10;
+  padding: 10px 12px;
+  border-top: 1px solid var(--learn-line);
+  display: flex;
+  align-items: center;
+  background: v-bind("theme.bodyColor");
+}
+.sheet-head {
+  display: flex;
+  align-items: baseline;
+  gap: 8px;
+  font-size: 13px;
+}
+.sheet-home {
+  margin-left: 12px;
+  color: var(--learn-green-text);
+  text-decoration: none;
 }
 </style>
diff --git a/apps/web/src/oj/learn/learn.css b/apps/web/src/oj/learn/learn.css
new file mode 100644
index 0000000..8025afa
--- /dev/null
+++ b/apps/web/src/oj/learn/learn.css
@@ -0,0 +1,24 @@
+/* 自学模块的几个颜色。深色模式下深绿、深橙的字在暗底上读不出来，换成亮一档的。
+   设计稿在「自学重设计」画布页（Learn*.dc.html）。 */
+:root {
+  --learn-green: #18a058;
+  --learn-green-text: #0c7a43;
+  --learn-green-bg: rgba(24, 160, 88, 0.1);
+  --learn-green-line: rgba(24, 160, 88, 0.35);
+  --learn-orange: #f0a020;
+  --learn-orange-text: #8a5200;
+  --learn-orange-bg: rgba(240, 160, 32, 0.14);
+  --learn-red-text: #b0263c;
+  --learn-line: rgba(128, 128, 128, 0.22);
+  --learn-soft: rgba(128, 128, 128, 0.07);
+  --learn-pane: #ffffff;
+  --learn-todo: rgba(128, 128, 128, 0.22);
+  --learn-code-font: Consolas, Monaco, "Microsoft YaHei", monospace;
+}
+
+html.dark {
+  --learn-green-text: #63e2b7;
+  --learn-orange-text: #f2c97d;
+  --learn-red-text: #f08a9b;
+  --learn-pane: rgba(255, 255, 255, 0.03);
+}
diff --git a/apps/web/src/oj/learn/lesson.ts b/apps/web/src/oj/learn/lesson.ts
new file mode 100644
index 0000000..23f72b1
--- /dev/null
+++ b/apps/web/src/oj/learn/lesson.ts
@@ -0,0 +1,117 @@
+import { isLessonDone, type TutorialProgress, type TutorialSummary } from "@oj2/contract"
+
+export type TutorialType = "python" | "c"
+
+export const COURSES: { type: TutorialType; label: string }[] = [
+  { type: "python", label: "Python" },
+  { type: "c", label: "C 语言" },
+]
+
+/**
+ * 标题是「情境——知识点」（「蜜橘园环境预警——条件语句基础」）。学生找的是知识点，
+ * 所以显示时知识点在前、情境在后。没有「——」的老教程整个当知识点。
+ */
+export function splitTitle(title: string) {
+  const at = title.indexOf("——")
+  if (at < 0) return { kp: title.trim(), scene: "" }
+  return { kp: title.slice(at + 2).trim(), scene: title.slice(0, at).trim() }
+}
+
+/** 编辑时拆开的两半拼回去 */
+export function joinTitle(kp: string, scene: string) {
+  return scene.trim() ? `${scene.trim()}——${kp.trim()}` : kp.trim()
+}
+
+export interface ProjectGroup {
+  /** 原样的项目名，「项目三 · 智慧农业·蜜橘园」；没填是空串 */
+  project: string
+  /** 「项目三」，没有这一截时是空串 */
+  no: string
+  /** 「智慧农业·蜜橘园」 */
+  name: string
+  icon: string
+  tone: "blue" | "purple" | "green" | "orange" | "gray"
+  /** 这个项目里的课，`step` 是在整门课里的序号（1 起） */
+  lessons: { id: number; title: string; step: number }[]
+}
+
+/** 「项目三 · 智慧农业·蜜橘园」拆成「项目三」和「智慧农业·蜜橘园」 */
+export function splitProject(project: string) {
+  const match = project.match(/^(项目[一二三四五六七八九十\d]+)\s*[·・.]\s*(.+)$/)
+  if (!match) return { no: "", name: project || "其他" }
+  return { no: match[1]!, name: match[2]!.trim() }
+}
+
+/** 项目图标按情境挑，认不出的给一本书 */
+function projectLook(name: string): Pick<ProjectGroup, "icon" | "tone"> {
+  if (name.includes("家居")) return { icon: "ph:house", tone: "blue" }
+  if (name.includes("工业") || name.includes("设备")) return { icon: "ph:factory", tone: "purple" }
+  if (name.includes("农业")) return { icon: "ph:plant", tone: "green" }
+  if (name.includes("交通")) return { icon: "ph:car", tone: "orange" }
+  return { icon: "ph:book-open", tone: "gray" }
+}
+
+/** 按项目分组，保持课程原来的顺序；同一个项目被别的项目隔开时各算一组 */
+export function groupByProject(titles: TutorialSummary[]): ProjectGroup[] {
+  const groups: ProjectGroup[] = []
+  titles.forEach((item, index) => {
+    const last = groups[groups.length - 1]
+    if (last && last.project === item.project) {
+      last.lessons.push({ id: item.id, title: item.title, step: index + 1 })
+      return
+    }
+    const { no, name } = splitProject(item.project)
+    groups.push({
+      project: item.project,
+      no,
+      name,
+      ...projectLook(name),
+      lessons: [{ id: item.id, title: item.title, step: index + 1 }],
+    })
+  })
+  return groups
+}
+
+export type LessonState = "done" | "started" | "todo"
+
+/**
+ * 目录上的三态。学完 = 练一练全对（契约的 `isLessonDone`）；打开过或者做过练一练但没
+ * 全对是「在学」；别的是没开始。
+ */
+export function lessonState(progress: TutorialProgress | undefined): LessonState {
+  if (!progress) return "todo"
+  if (isLessonDone(progress)) return "done"
+  if (progress.viewCount > 0 || progress.exerciseSolved > 0) return "started"
+  return "todo"
+}
+
+/**
+ * 「接着学」哪一课：最近打开的那课；它已经学完了，就往后找第一课没学完的。
+ * 一课没打开过返回 null（首页换成「开始学」）。
+ */
+export function continueStep(
+  titles: TutorialSummary[],
+  progress: Record<number, TutorialProgress>,
+) {
+  let latest: TutorialProgress | null = null
+  for (const item of titles) {
+    const row = progress[item.id]
+    if (row?.lastViewedAt && (!latest || row.lastViewedAt > latest.lastViewedAt!)) latest = row
+  }
+  if (!latest) return null
+  const index = titles.findIndex((item) => item.id === latest!.tutorialId)
+  if (index < 0) return null
+  if (lessonState(latest) !== "done") return index + 1
+  for (let i = index + 1; i < titles.length; i++) {
+    if (lessonState(progress[titles[i]!.id]) !== "done") return i + 1
+  }
+  return index + 1
+}
+
+export function doneCount(titles: TutorialSummary[], progress: Record<number, TutorialProgress>) {
+  return titles.filter((item) => lessonState(progress[item.id]) === "done").length
+}
+
+export function lessonPath(type: TutorialType, step: number) {
+  return `/learn/${type}/${step.toString().padStart(2, "0")}`
+}
diff --git a/apps/web/src/routes.ts b/apps/web/src/routes.ts
index 2309735..c7d4911 100644
--- a/apps/web/src/routes.ts
+++ b/apps/web/src/routes.ts
@@ -121,6 +121,11 @@ export const ojs: RouteRecordRaw = {
       component: () => import("oj/user/message.vue"),
       meta: { requiresAuth: true },
     },
+    {
+      path: "learn",
+      name: "learn home",
+      component: () => import("oj/learn/home.vue"),
+    },
     {
       path: "learn/:type/:step",
       name: "learn",
diff --git a/apps/web/src/shared/components/Header.vue b/apps/web/src/shared/components/Header.vue
index c019ab5..9db328f 100644
--- a/apps/web/src/shared/components/Header.vue
+++ b/apps/web/src/shared/components/Header.vue
@@ -4,7 +4,6 @@ import { NSwitch, useThemeVars } from "naive-ui"
 import { RouterLink } from "vue-router"
 import { useBreakpoints } from "shared/composables/breakpoints"
 import { useDarkTransition } from "shared/composables/darkTransition"
-import { useLearnProgress } from "shared/composables/learnProgress"
 import { useAuthModalStore } from "shared/store/authModal"
 import { useCollabStore } from "shared/store/collab"
 import { useConfigStore } from "../store/config"
@@ -20,7 +19,6 @@ const route = useRoute()
 const router = useRouter()
 
 const { isMobile, isDesktop } = useBreakpoints()
-const { learnStep } = useLearnProgress()
 const { isDark, toggleDark } = useDarkTransition()
 const theme = useThemeVars()
 
@@ -77,16 +75,12 @@ function renderIcon(icon: string) {
   return () => h(Icon, { icon, width: 18 })
 }
 
-function learnLink(type: "python" | "c") {
-  return `/learn/${type}/${learnStep.value[type].toString().padStart(2, "0")}`
-}
-
 /**
  * 顶栏导航的唯一一张表：桌面端渲染成一排纯文字，窄屏收进「菜单」下拉。
  * `key` 就是一级路径，用来判定高亮（见上面的 active）。
  *
- * 顺序是 自学 / 题目 / 提交 / 题单 / 比赛 / 排名。「自学」是下拉，单独渲染在最前面，
- * 不在这张表里。提交留在一级：学生天天回来看自己交的结果，老师课上翻全班代码也走它。
+ * 顺序是 自学 / 题目 / 提交 / 题单 / 比赛 / 排名。「自学」进自学首页（/learn），
+ * 两门课、接着学哪一课都在那儿挑，不再是下拉。提交留在一级：学生天天回来看自己交的结果，老师课上翻全班代码也走它。
  * 公告不上顶栏 —— 一年五六条、基本是版本更新，首页有公告卡片和「全部」入口；
  * 只有手机菜单里留一项（见 mobileMenus）。
  * 不用 n-menu：它横排每项固定占 100px，1280 宽的机房屏上会把顶栏挤成两行。
@@ -100,6 +94,7 @@ interface NavLink {
 
 const navLinks = computed<NavLink[]>(() =>
   [
+    { key: "learn", label: "自学", to: "/learn" },
     { key: "problem", label: "题目", to: "/problem" },
     { key: "submission", label: "提交", to: "/submission", show: userStore.showSubmissions },
     { key: "problemset", label: "题单", to: "/problemset" },
@@ -110,24 +105,14 @@ const navLinks = computed<NavLink[]>(() =>
 
 const announcementLink: NavLink = { key: "announcement", label: "公告", to: "/announcement" }
 
-const learnOptions: DropdownOption[] = [
-  { label: "Python", key: "learn-python", icon: renderIcon("ph:book-open") },
-  { label: "C 语言", key: "learn-c", icon: renderIcon("ph:book-open") },
-]
-
 const mobileMenus = computed<DropdownOption[]>(() => [
-  { label: "自学", key: "learn", children: learnOptions },
   ...navLinks.value.map((link) => ({ label: link.label, key: link.key })),
   { label: announcementLink.label, key: announcementLink.key },
 ])
 
 function handleNavSelect(key: string) {
-  if (key === "learn-python") router.push(learnLink("python"))
-  else if (key === "learn-c") router.push(learnLink("c"))
-  else {
-    const link = [...navLinks.value, announcementLink].find((item) => item.key === key)
-    if (link) router.push(link.to)
-  }
+  const link = [...navLinks.value, announcementLink].find((item) => item.key === key)
+  if (link) router.push(link.to)
 }
 
 const adminPath = computed(() => (userStore.isSuperAdmin ? "/admin" : "/admin/problem/list"))
@@ -236,11 +221,6 @@ const options = computed<Array<DropdownOption | DropdownDividerOption>>(() => {
       </n-tag>
     </RouterLink>
     <nav v-if="isDesktop" class="nav">
-      <n-dropdown trigger="hover" :options="learnOptions" @select="handleNavSelect">
-        <button type="button" class="nav-link" :class="{ active: active === 'learn' }">
-          自学<Icon icon="ph:caret-down-bold" :width="11" />
-        </button>
-      </n-dropdown>
       <RouterLink
         v-for="link in navLinks"
         :key="link.key"
diff --git a/apps/web/src/shared/components/MarkdownEditor.vue b/apps/web/src/shared/components/MarkdownEditor.vue
index 44ecfb2..164739f 100644
--- a/apps/web/src/shared/components/MarkdownEditor.vue
+++ b/apps/web/src/shared/components/MarkdownEditor.vue
@@ -1,17 +1,44 @@
 <template>
-  <MdEditor :theme="isDark ? 'dark' : 'light'" v-model="modelValue" @onUploadImg="onUploadImg" />
+  <MdEditor
+    ref="editor"
+    :theme="isDark ? 'dark' : 'light'"
+    v-model="modelValue"
+    :preview="preview"
+    :style="height ? { height } : undefined"
+    @onUploadImg="onUploadImg"
+  />
 </template>
 
 <script setup lang="ts">
-import { MdEditor } from "md-editor-v3"
+import { MdEditor, type ExposeParam } from "md-editor-v3"
 import "md-editor-v3/lib/style.css"
 import { uploadImage } from "../../admin/api"
+
+/**
+ * `preview` 关掉自带的预览：教程编辑页右边要用学生端同一套组件预览（练一练、能运行的
+ * 代码块），md-editor 自己那份预览认不出 `[[exercise:N]]`。
+ */
+const { preview = true, height } = defineProps<{ preview?: boolean; height?: string }>()
+
 const isDark = useDark()
+const editor = useTemplateRef<ExposeParam>("editor")
 
 const modelValue = defineModel<string>("value")
 
 const message = useMessage()
 
+/** 在光标处插一段文字（教程编辑页插练一练占位符用），自成一行 */
+function insert(text: string) {
+  editor.value?.insert(() => ({
+    targetValue: `\n${text}\n`,
+    select: false,
+    deviationStart: 0,
+    deviationEnd: 0,
+  }))
+}
+
+defineExpose({ insert })
+
 const onUploadImg = async (files: File[], callback: (urls: string[]) => void) => {
   try {
     const res = await Promise.all(
diff --git a/apps/web/src/shared/composables/learnProgress.ts b/apps/web/src/shared/composables/learnProgress.ts
deleted file mode 100644
index 45934cb..0000000
--- a/apps/web/src/shared/composables/learnProgress.ts
+++ /dev/null
@@ -1,15 +0,0 @@
-import { useStorage } from "@vueuse/core"
-import { STORAGE_KEY } from "utils/constants"
-
-export type TutorialType = "python" | "c"
-
-// 模块级单例：学习页写入、导航栏读取，必须共用同一个响应式引用，
-// 否则导航栏的链接不会随学习进度更新
-const learnStep = useStorage<Record<TutorialType, number>>(STORAGE_KEY.LEARN_CURRENT_STEP, {
-  python: 1,
-  c: 1,
-})
-
-export function useLearnProgress() {
-  return { learnStep }
-}
diff --git a/apps/web/src/utils/constants.ts b/apps/web/src/utils/constants.ts
index cc7e97c..ee61f47 100644
--- a/apps/web/src/utils/constants.ts
+++ b/apps/web/src/utils/constants.ts
@@ -150,7 +150,6 @@ export { USER_TYPE, PROBLEM_PERMISSION } from "@oj2/contract"
 export const STORAGE_KEY = {
   AUTHED: "authed",
   LANGUAGE: "problemLanguage",
-  LEARN_CURRENT_STEP: "learnStep",
   ADMIN_PROBLEM: "adminProblem",
   ADMIN_SQL_PROBLEM: "adminSqlProblem",
   ADMIN_CODE_PROBLEM: "adminCodeProblem",
diff --git a/apps/web/src/utils/types.ts b/apps/web/src/utils/types.ts
index 39653e8..49a40f2 100644
--- a/apps/web/src/utils/types.ts
+++ b/apps/web/src/utils/types.ts
@@ -329,10 +329,8 @@ export type {
   AdminAiReportList,
   StuckProblem,
   AcTrend,
-  LearnStudentProgress,
-  LearnStudentProgressList,
-  LearnTutorialProgress,
-  LearnTutorialProgressList,
+  LearnBoard,
+  LearnBoardStudent,
   LearnExerciseProgress,
   LearnExerciseProgressList,
   LearnExerciseAttempt,
@@ -390,13 +388,13 @@ import type { AdminExercise, AdminTutorial, CreateSubmissionRequest } from "@oj2
 
 /**
  * 教程编辑表单。只留可编辑字段 —— createdBy / createdAt / updatedAt 由后端产出，
- * 新建时压根不存在（对齐 BlankProblem / BlankContest 的写法）。
- *
- * `code` 收窄成 string：读回来时统一 `?? ""`，代码编辑器的 v-model 不接受 null。
+ * 新建时压根不存在（对齐 BlankProblem / BlankContest 的写法）。「示例代码」字段界面上
+ * 去掉了（正文里的代码块能直接运行），挂的题走单独的接口。
  */
-export type TutorialEdit = Omit<AdminTutorial, "createdBy" | "createdAt" | "updatedAt" | "code"> & {
-  code: string
-}
+export type TutorialEdit = Omit<
+  AdminTutorial,
+  "createdBy" | "createdAt" | "updatedAt" | "code" | "problems"
+>
 
 export interface ExerciseMcqData {
   question: string
@@ -448,6 +446,8 @@ export type { ExerciseType } from "@oj2/contract"
  * 前端按题型收窄成判别联合 —— 组件靠它区分七种题型的字段。
  */
 export type Exercise = Omit<AdminExercise, "data"> & {
+  /** 学生端才有：当前学生做对过没有（后台的练习列表不下发） */
+  solved?: boolean
   data:
     | ExerciseMcqData
     | ExerciseSortData