diff --git a/apps/web/src/oj/home/dashboard.vue b/apps/web/src/oj/home/dashboard.vue
new file mode 100644
index 0000000..6f545d5
--- /dev/null
+++ b/apps/web/src/oj/home/dashboard.vue
@@ -0,0 +1,486 @@
+<script setup lang="ts">
+import { Icon } from "@iconify/vue"
+import {
+  getAnnouncement,
+  getAnnouncementList,
+  getContestList,
+  getLearnProgress,
+  getSubmissions,
+  getTutorials,
+  getWeeklyRank,
+} from "oj/api"
+import SubmissionResultTag from "shared/components/SubmissionResultTag.vue"
+import { useBreakpoints } from "shared/composables/breakpoints"
+import { useUserStore } from "shared/store/user"
+import { ContestStatus, CONTEST_STATUS } from "utils/constants"
+import { duration, parseTime, zonedParts } from "utils/functions"
+import type { AnnouncementListItem, Contest, SubmissionListItem, WeeklyRank } from "utils/types"
+
+type TutorialType = "python" | "c"
+
+interface Track {
+  type: TutorialType
+  label: string
+  /** 接着学的那一课，1 起 */
+  step: number
+  title: string
+  total: number
+  /** 打开过的课数 */
+  read: number
+  lastViewedAt: string | null
+}
+
+const router = useRouter()
+const userStore = useUserStore()
+const { isDesktop } = useBreakpoints()
+
+const tracks = ref<Track[]>([])
+const contests = ref<Contest[]>([])
+const submissions = ref<SubmissionListItem[]>([])
+const announcements = ref<AnnouncementListItem[]>([])
+const weekly = ref<WeeklyRank | null>(null)
+const loaded = ref(false)
+const keyword = ref("")
+
+const greeting = computed(() => {
+  const hour = zonedParts(new Date())!.hour
+  if (hour < 5) return "夜深了"
+  if (hour < 11) return "早上好"
+  if (hour < 13) return "中午好"
+  if (hour < 18) return "下午好"
+  return "晚上好"
+})
+
+const weeklyText = computed(() => {
+  const me = weekly.value?.me
+  if (!weekly.value) return ""
+  const where = weekly.value.scope === "class" ? "班里" : "全站"
+  if (!me) return "本周还没有新通过的题，做出 1 题就能上进步榜"
+  return `本周新通过 ${me.solvedCount} 题，${where}第 ${me.rank} 名`
+})
+
+/**
+ * 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。
+ */
+async function loadTrack(type: TutorialType, label: string): Promise<Track | null> {
+  const [titles, progress] = 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),
+    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,
+    total: titles.length,
+    read: seen.length,
+    lastViewedAt: latest?.lastViewedAt ?? null,
+  }
+}
+
+async function loadTracks() {
+  const res = await Promise.all([loadTrack("python", "Python"), loadTrack("c", "C 语言")])
+  // 最近在学的那门排前面；两门都没碰过就按原顺序
+  tracks.value = res
+    .filter((t): t is Track => !!t)
+    .sort((a, b) => (b.lastViewedAt ?? "").localeCompare(a.lastViewedAt ?? ""))
+}
+
+async function loadContests() {
+  const query = { offset: 0, limit: 5, keyword: "", tag: "" }
+  const [underway, upcoming] = await Promise.all([
+    getContestList({ ...query, status: ContestStatus.underway }),
+    getContestList({ ...query, status: ContestStatus.not_started }),
+  ])
+  contests.value = [...underway.results, ...upcoming.results].slice(0, 5)
+}
+
+async function loadSubmissions() {
+  const res = await getSubmissions({ myself: "1", offset: 0, limit: 6, language: "" })
+  submissions.value = res.results
+}
+
+async function loadAnnouncements() {
+  const res = await getAnnouncementList(0, 4)
+  announcements.value = res.results
+}
+
+async function loadWeekly() {
+  weekly.value = await getWeeklyRank(userStore.user?.className ? "class" : "global")
+}
+
+async function load() {
+  // 各块互不依赖，哪块挂了就空着那一块，别让一个接口拖垮整页
+  await Promise.allSettled([
+    loadTracks(),
+    loadContests(),
+    loadSubmissions(),
+    loadAnnouncements(),
+    loadWeekly(),
+  ])
+  loaded.value = true
+}
+
+watch(
+  () => userStore.isFinished && userStore.isAuthed,
+  (ready) => ready && load(),
+  { immediate: true },
+)
+
+function learnLink(track: Track) {
+  return `/learn/${track.type}/${track.step.toString().padStart(2, "0")}`
+}
+
+function searchProblem() {
+  const value = keyword.value.trim()
+  router.push({ path: "/problem", query: value ? { keyword: value } : {} })
+}
+
+function openSubmission(row: SubmissionListItem) {
+  if (row.showLink) router.push(`/submission/${row.id}`)
+  else router.push(`/problem/${row.problemDisplayId}`)
+}
+
+/** 刚刚 / 12 分钟前 / 今天 14:03 / 9月21日 */
+function relativeTime(value: string) {
+  const diff = Date.now() - new Date(value).getTime()
+  if (diff < 60_000) return "刚刚"
+  if (diff < 3_600_000) return `${Math.floor(diff / 60_000)} 分钟前`
+  const now = zonedParts(new Date())!
+  const then = zonedParts(value)!
+  if (now.year === then.year && now.month === then.month && now.day === then.day) {
+    return parseTime(value, "今天 HH:mm")
+  }
+  return parseTime(value, now.year === then.year ? "M月D日" : "YYYY年M月D日")
+}
+
+function contestTime(contest: Contest) {
+  if (contest.status === ContestStatus.underway) {
+    return `${parseTime(contest.endTime, "M月D日 HH:mm")} 结束`
+  }
+  return `${parseTime(contest.startTime, "M月D日 HH:mm")} 开始 · 时长 ${duration(contest.startTime, contest.endTime)}`
+}
+
+const announcementShow = ref(false)
+const announcementTitle = ref("")
+const announcementContent = ref("")
+
+async function openAnnouncement(item: AnnouncementListItem) {
+  const res = await getAnnouncement(item.id)
+  announcementTitle.value = item.title
+  announcementContent.value = res.content
+  announcementShow.value = true
+}
+</script>
+
+<template>
+  <div class="home">
+    <section class="hero">
+      <div>
+        <h1 class="hello">{{ greeting }}，{{ userStore.user?.username }}</h1>
+        <n-text depth="3">
+          已解决 {{ userStore.profile?.acceptedNumber ?? 0 }} 题 · 共提交
+          {{ userStore.profile?.submissionNumber ?? 0 }} 次
+          <template v-if="weeklyText">
+            ·
+            <router-link to="/rank" class="plain-link">{{ weeklyText }}</router-link>
+          </template>
+        </n-text>
+      </div>
+      <n-input-group class="search">
+        <n-input
+          v-model:value="keyword"
+          placeholder="题号或题目名"
+          clearable
+          @keyup.enter="searchProblem"
+        />
+        <n-button type="primary" @click="searchProblem">找题</n-button>
+      </n-input-group>
+    </section>
+
+    <div class="grid">
+      <div class="column">
+        <n-card title="继续学习" size="small" :bordered="false" class="card">
+          <n-flex vertical :size="12">
+            <router-link
+              v-for="track in tracks"
+              :key="track.type"
+              :to="learnLink(track)"
+              class="track"
+            >
+              <div class="track-main">
+                <n-text depth="3" class="track-label">
+                  {{ track.label }} · 第 {{ track.step }} / {{ track.total }} 课
+                </n-text>
+                <div class="track-title">{{ track.title }}</div>
+                <n-progress
+                  type="line"
+                  :percentage="Math.round((track.read / track.total) * 100)"
+                  status="success"
+                  :show-indicator="false"
+                  :height="6"
+                />
+                <n-text depth="3" class="track-meta">
+                  已打开 {{ track.read }} 课
+                  <template v-if="track.lastViewedAt">
+                    · 上次 {{ relativeTime(track.lastViewedAt) }}
+                  </template>
+                </n-text>
+              </div>
+              <n-button :type="track.lastViewedAt ? 'primary' : 'default'" tag="span">
+                {{ track.lastViewedAt ? "继续" : "开始" }}
+              </n-button>
+            </router-link>
+            <n-empty v-if="loaded && !tracks.length" description="还没有公开的教程" />
+          </n-flex>
+        </n-card>
+
+        <n-card title="最近提交" size="small" :bordered="false" class="card">
+          <template #header-extra>
+            <router-link to="/submission?myself=1" class="more">全部</router-link>
+          </template>
+          <div
+            v-for="row in submissions"
+            :key="row.id"
+            class="row clickable"
+            @click="openSubmission(row)"
+          >
+            <SubmissionResultTag :result="row.result" size="small" />
+            <span class="row-title">{{ row.problemDisplayId }} {{ row.problemTitle }}</span>
+            <n-text depth="3" class="row-meta">{{ relativeTime(row.createTime) }}</n-text>
+          </div>
+          <n-empty v-if="loaded && !submissions.length" description="还没有提交过">
+            <template #extra>
+              <n-button size="small" @click="router.push('/problem')">去做题</n-button>
+            </template>
+          </n-empty>
+        </n-card>
+      </div>
+
+      <div class="column">
+        <n-card title="比赛" size="small" :bordered="false" class="card">
+          <template #header-extra>
+            <router-link to="/contest" class="more">全部</router-link>
+          </template>
+          <router-link
+            v-for="contest in contests"
+            :key="contest.id"
+            :to="`/contest/${contest.id}`"
+            class="row stacked"
+          >
+            <n-flex align="center" :size="8" :wrap="false">
+              <n-tag :type="CONTEST_STATUS[contest.status].type" size="small" :bordered="false">
+                {{ CONTEST_STATUS[contest.status].name }}
+              </n-tag>
+              <span class="row-title">{{ contest.title }}</span>
+            </n-flex>
+            <n-text depth="3" class="row-meta">{{ contestTime(contest) }}</n-text>
+          </router-link>
+          <n-text v-if="loaded && !contests.length" depth="3">
+            现在没有进行中或即将开始的比赛
+          </n-text>
+        </n-card>
+
+        <n-card title="公告" size="small" :bordered="false" class="card">
+          <template #header-extra>
+            <router-link to="/announcement" class="more">全部</router-link>
+          </template>
+          <div
+            v-for="item in announcements"
+            :key="item.id"
+            class="row clickable"
+            @click="openAnnouncement(item)"
+          >
+            <n-tag v-if="item.top" type="error" size="small" :bordered="false">置顶</n-tag>
+            <span class="row-title">{{ item.title }}</span>
+            <n-text depth="3" class="row-meta">{{ parseTime(item.createTime, "M月D日") }}</n-text>
+          </div>
+        </n-card>
+
+        <n-card size="small" :bordered="false" class="card">
+          <n-flex :size="8" class="shortcuts">
+            <n-button secondary @click="router.push('/problem')">
+              <template #icon><Icon icon="fluent-emoji:memo" /></template>
+              题库
+            </n-button>
+            <n-button secondary @click="router.push('/problemset')">
+              <template #icon><Icon icon="fluent-emoji:clipboard" /></template>
+              题单
+            </n-button>
+            <n-button secondary @click="router.push('/achievement')">
+              <template #icon><Icon icon="fluent-emoji:sports-medal" /></template>
+              成就
+            </n-button>
+            <n-button secondary @click="router.push('/ai-analysis')">
+              <template #icon><Icon icon="fluent-emoji:crystal-ball" /></template>
+              智能分析
+            </n-button>
+          </n-flex>
+        </n-card>
+      </div>
+    </div>
+
+    <n-modal
+      v-model:show="announcementShow"
+      preset="card"
+      :style="{ maxWidth: isDesktop ? '70vw' : undefined, maxHeight: '80vh' }"
+      :content-style="{ overflow: 'auto' }"
+      :title="announcementTitle"
+    >
+      <div v-html="announcementContent"></div>
+    </n-modal>
+  </div>
+</template>
+
+<style scoped>
+.home {
+  max-width: 1200px;
+  margin: 0 auto;
+}
+
+.hero {
+  display: flex;
+  align-items: flex-end;
+  justify-content: space-between;
+  gap: 16px;
+  flex-wrap: wrap;
+  margin: 8px 0 20px;
+}
+
+.hello {
+  font-size: 24px;
+  font-weight: 600;
+  margin: 0 0 6px;
+}
+
+.search {
+  width: 320px;
+  max-width: 100%;
+}
+
+.grid {
+  display: grid;
+  grid-template-columns: minmax(0, 3fr) minmax(0, 2fr);
+  gap: 16px;
+}
+
+@media (max-width: 900px) {
+  .grid {
+    grid-template-columns: minmax(0, 1fr);
+  }
+}
+
+.column {
+  display: flex;
+  flex-direction: column;
+  gap: 16px;
+  min-width: 0;
+}
+
+.card {
+  border-radius: 8px;
+  background-color: var(--n-color-embedded, rgba(128, 128, 128, 0.06));
+}
+
+.track {
+  display: flex;
+  align-items: center;
+  gap: 16px;
+  padding: 12px;
+  border-radius: 6px;
+  color: inherit;
+  text-decoration: none;
+  background-color: rgba(128, 128, 128, 0.06);
+  transition: background-color 0.2s;
+}
+
+.track:hover {
+  background-color: rgba(24, 160, 88, 0.1);
+}
+
+.track-main {
+  flex: 1;
+  min-width: 0;
+  display: flex;
+  flex-direction: column;
+  gap: 4px;
+}
+
+.track-label,
+.track-meta,
+.row-meta {
+  font-size: 12px;
+}
+
+.track-title {
+  font-size: 16px;
+  font-weight: 500;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.row {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  padding: 8px 4px;
+  border-radius: 4px;
+  color: inherit;
+  text-decoration: none;
+}
+
+.row + .row {
+  border-top: 1px solid rgba(128, 128, 128, 0.12);
+}
+
+.row.stacked {
+  flex-direction: column;
+  align-items: stretch;
+  gap: 4px;
+}
+
+.clickable,
+a.row {
+  cursor: pointer;
+}
+
+.clickable:hover,
+a.row:hover {
+  background-color: rgba(128, 128, 128, 0.08);
+}
+
+.row-title {
+  flex: 1;
+  min-width: 0;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.row-meta {
+  flex-shrink: 0;
+}
+
+.more,
+.plain-link {
+  color: inherit;
+  text-decoration: none;
+}
+
+.more {
+  font-size: 13px;
+  opacity: 0.7;
+}
+
+.more:hover,
+.plain-link:hover {
+  color: #18a058;
+}
+</style>
diff --git a/apps/web/src/oj/home/index.vue b/apps/web/src/oj/home/index.vue
new file mode 100644
index 0000000..0a9f6d7
--- /dev/null
+++ b/apps/web/src/oj/home/index.vue
@@ -0,0 +1,22 @@
+<script setup lang="ts">
+import { STORAGE_KEY } from "utils/constants"
+import storage from "utils/storage"
+import { useUserStore } from "shared/store/user"
+
+// 两边都按需加载：没登录的访客只拿题目列表那一份，登录了的学生只拿首页那一份
+const Dashboard = defineAsyncComponent(() => import("./dashboard.vue"))
+const ProblemList = defineAsyncComponent(() => import("oj/problem/list.vue"))
+
+const userStore = useUserStore()
+
+// profile 回来之前先按上次的登录标记猜一个：干等的话 /profile 一失败首页就是
+// 白的，而先按「没登录」渲染又会让每个学生都先闪一下题目列表
+const showDashboard = computed(() =>
+  userStore.isFinished ? userStore.isAuthed : !!storage.get(STORAGE_KEY.AUTHED),
+)
+</script>
+
+<template>
+  <Dashboard v-if="showDashboard" />
+  <ProblemList v-else />
+</template>
diff --git a/apps/web/src/oj/problem/components/EditorToolbar.vue b/apps/web/src/oj/problem/components/EditorToolbar.vue
index 664e61f..0a103bf 100644
--- a/apps/web/src/oj/problem/components/EditorToolbar.vue
+++ b/apps/web/src/oj/problem/components/EditorToolbar.vue
@@ -76,7 +76,7 @@ const showCollabBar = computed(() => collabHere.value && userStore.isTeacherOrAb
 
 /**
  * 状态全塞进按钮本身。原来旁边还挂一个 n-tag 说明排队情况，一行工具栏
- * （语言 / 提交 / 提交信息 / 课堂统计 / 更多操作 / 求助）在 1280 的机房屏上放不下。
+ * （语言 / 提交 / 本题提交 / 课堂统计 / 更多 / 求助）在 1280 的机房屏上放不下。
  */
 const helpButtonText = computed(() => {
   if (collabStore.helpStatus === "active") {
@@ -122,7 +122,7 @@ const menuOptions = computed<DropdownOption[]>(() => {
   if (!isDesktop.value) {
     if (showGoSubmissionButton.value) {
       options.push({
-        label: "提交信息",
+        label: "本题提交",
         key: "submissions",
       })
     }
@@ -272,7 +272,7 @@ onMounted(() => {
     <SubmitCode v-else />
 
     <n-button v-if="isDesktop && showGoSubmissionButton" :size="buttonSize" @click="goSubmissions">
-      提交信息
+      本题提交
     </n-button>
 
     <n-button
@@ -283,14 +283,14 @@ onMounted(() => {
       课堂统计
     </n-button>
 
-    <!-- 自测猫 / 复制代码 / 重置代码 / 编辑题目 收进下拉菜单；移动端再加上提交信息 / 课堂统计 -->
+    <!-- 自测猫 / 复制代码 / 重置代码 / 编辑题目 收进下拉菜单；移动端再加上本题提交 / 课堂统计 -->
     <n-dropdown
       v-if="menuOptions.length"
       trigger="click"
       :options="menuOptions"
       @select="handleMenuSelect"
     >
-      <n-button :size="buttonSize">更多操作</n-button>
+      <n-button :size="buttonSize">更多</n-button>
     </n-dropdown>
 
     <template v-if="showCollabBar">
diff --git a/apps/web/src/oj/problem/components/ProblemContent.vue b/apps/web/src/oj/problem/components/ProblemContent.vue
index 96599a4..5e6e914 100644
--- a/apps/web/src/oj/problem/components/ProblemContent.vue
+++ b/apps/web/src/oj/problem/components/ProblemContent.vue
@@ -1,9 +1,10 @@
 <script setup lang="ts">
 import { Icon } from "@iconify/vue"
-import { useThemeVars } from "naive-ui"
 import { storeToRefs } from "pinia"
 import { useCodeStore } from "oj/store/code"
 import { useProblemStore } from "oj/store/problem"
+import { DIFFICULTY } from "utils/constants"
+import { getTagColor } from "utils/functions"
 import { createTestSubmission } from "utils/judge"
 import type { ProblemDetail, ProblemRow, ProblemStatus } from "utils/types"
 import Copy from "shared/components/Copy.vue"
@@ -20,8 +21,6 @@ type Sample = ProblemDetail["samples"][number] & {
   loading: boolean
 }
 
-const theme = useThemeVars()
-const style = computed(() => "color: " + theme.value.primaryColor)
 const isDark = useDark()
 const route = useRoute()
 const codeStore = useCodeStore()
@@ -190,16 +189,47 @@ function type(status: ProblemStatus) {
       </n-alert>
     </template>
 
-    <n-flex align="center">
-      <n-tag>{{ problem._id }}</n-tag>
-      <h2 class="problemTitle">{{ problem.title }}</h2>
-    </n-flex>
-    <p class="title" :style="style">
-      <n-flex align="center">
-        <Icon icon="streamline-ultimate-color:checklist"></Icon>
-        描述
+    <header class="problem-head">
+      <n-flex align="center" :size="10" :wrap="false">
+        <n-tag :bordered="false">{{ problem._id }}</n-tag>
+        <h2 class="problemTitle">{{ problem.title }}</h2>
       </n-flex>
-    </p>
+      <n-flex align="center" :size="8" class="problem-meta">
+        <n-tag
+          v-if="problem.difficulty"
+          size="small"
+          :bordered="false"
+          :type="getTagColor(problem.difficulty)"
+        >
+          {{ DIFFICULTY[problem.difficulty] }}
+        </n-tag>
+        <n-text depth="3" v-if="!isSQL">
+          时间限制 {{ problem.timeLimit }} ms · 内存限制 {{ problem.memoryLimit }} MB
+        </n-text>
+      </n-flex>
+    </header>
+
+    <!-- 代码要求（AST 规则）放在最前面：它是硬性的判定条件，写到一半才看见就晚了 -->
+    <div v-if="astRequirements.length > 0" class="requirements">
+      <n-flex align="center" :size="6" class="requirements-head">
+        <Icon icon="streamline-ultimate-color:check-button" :width="18"></Icon>
+        <span>代码要求</span>
+        <n-text depth="3" class="requirements-note">提交时会逐条检查</n-text>
+      </n-flex>
+      <div v-for="[lang, rules] in astRequirements" :key="lang" class="requirements-lang">
+        <span v-if="astRequirements.length > 1" class="lang-label">{{ lang }}</span>
+        <n-flex :size="6">
+          <n-tag v-for="(rule, i) in rules" :key="i" :type="KIND_TAG_TYPE[rule.kind]" size="small">
+            {{ rule.description }}
+          </n-tag>
+        </n-flex>
+      </div>
+    </div>
+
+    <h3 class="title">
+      <Icon icon="streamline-ultimate-color:checklist"></Icon>
+      描述
+    </h3>
     <MdPreview
       preview-theme="vuepress"
       :model-value="problem.description"
@@ -207,24 +237,20 @@ function type(status: ProblemStatus) {
     />
 
     <template v-if="!isSQL">
-      <p class="title" :style="style">
-        <n-flex align="center">
-          <Icon icon="streamline-ultimate-color:envelope-back-front"></Icon>
-          输入
-        </n-flex>
-      </p>
+      <h3 class="title">
+        <Icon icon="streamline-ultimate-color:envelope-back-front"></Icon>
+        输入
+      </h3>
       <MdPreview
         preview-theme="vuepress"
         :model-value="problem.inputDescription"
         :theme="isDark ? 'dark' : 'light'"
       />
 
-      <p class="title" :style="style">
-        <n-flex align="center">
-          <Icon icon="streamline-ultimate-color:mailbox-post"></Icon>
-          输出
-        </n-flex>
-      </p>
+      <h3 class="title">
+        <Icon icon="streamline-ultimate-color:mailbox-post"></Icon>
+        输出
+      </h3>
       <MdPreview
         preview-theme="vuepress"
         :model-value="problem.outputDescription"
@@ -232,13 +258,51 @@ function type(status: ProblemStatus) {
       />
     </template>
 
-    <template v-if="isSQL && sqlDisplay">
-      <p class="title" :style="style">
-        <n-flex align="center">
-          <Icon icon="devicon:sqlite"></Icon>
-          数据表
+    <template v-if="!isSQL">
+      <section v-for="(sample, index) of samples" :key="index" class="sample">
+        <n-flex align="center" justify="space-between" class="sample-head">
+          <h3 class="title">
+            <Icon icon="streamline-emojis:microscope"></Icon>
+            例子 {{ index + 1 }}
+          </h3>
+          <n-button
+            size="small"
+            secondary
+            :type="type(sample.status) || 'default'"
+            :loading="sample.loading"
+            @click="test(sample, index)"
+          >
+            {{ label(sample.status, sample.loading) }}
+          </n-button>
         </n-flex>
-      </p>
+        <div class="sample-grid">
+          <div class="sample-box">
+            <n-flex align="center" justify="space-between" class="sample-label">
+              <span>输入</span>
+              <Copy :value="sample.input" />
+            </n-flex>
+            <pre class="testcase">{{ sample.input }}</pre>
+          </div>
+          <div class="sample-box">
+            <n-flex align="center" justify="space-between" class="sample-label">
+              <span>输出</span>
+              <Copy :value="sample.output" />
+            </n-flex>
+            <pre class="testcase">{{ sample.output }}</pre>
+          </div>
+        </div>
+        <div v-if="sample.msg" class="sample-box sample-result">
+          <div class="sample-label">运行结果</div>
+          <pre class="testcase">{{ sample.msg }}</pre>
+        </div>
+      </section>
+    </template>
+
+    <template v-if="isSQL && sqlDisplay">
+      <h3 class="title">
+        <Icon icon="devicon:sqlite"></Icon>
+        数据表
+      </h3>
       <div v-for="t in sqlDisplay.tables" :key="t.name">
         <p class="sqlTableName">{{ t.name }}</p>
         <SQLDataTable
@@ -249,12 +313,10 @@ function type(status: ProblemStatus) {
         />
       </div>
 
-      <p class="title" :style="style">
-        <n-flex align="center">
-          <Icon icon="streamline-ultimate-color:check-button"></Icon>
-          期望结果
-        </n-flex>
-      </p>
+      <h3 class="title">
+        <Icon icon="streamline-ultimate-color:check-button"></Icon>
+        期望结果
+      </h3>
       <template v-if="sqlExpectedQuery">
         <SQLDataTable
           :columns="sqlExpectedQuery.columns"
@@ -279,12 +341,10 @@ function type(status: ProblemStatus) {
     </template>
 
     <div v-if="problem.hint">
-      <p class="title" :style="style">
-        <n-flex align="center">
-          <Icon icon="streamline-emojis:man-tipping-hand-1"></Icon>
-          提示
-        </n-flex>
-      </p>
+      <h3 class="title">
+        <Icon icon="streamline-emojis:man-tipping-hand-1"></Icon>
+        提示
+      </h3>
       <MdPreview
         preview-theme="preview"
         :model-value="problem.hint"
@@ -292,72 +352,11 @@ function type(status: ProblemStatus) {
       />
     </div>
 
-    <!-- 代码要求（AST 规则） -->
-    <div v-if="astRequirements.length > 0">
-      <p class="title" :style="style">
-        <n-flex align="center">
-          <Icon icon="streamline-ultimate-color:check-button"></Icon>
-          要求
-        </n-flex>
-      </p>
-      <div v-for="[lang, rules] in astRequirements" :key="lang">
-        <p v-if="astRequirements.length > 1" class="lang-label">
-          {{ lang }}
-        </p>
-        <n-list bordered style="margin-bottom: 8px">
-          <n-list-item v-for="(rule, i) in rules" :key="i">
-            <n-tag :type="KIND_TAG_TYPE[rule.kind]">{{ rule.description }}</n-tag>
-          </n-list-item>
-        </n-list>
-      </div>
-    </div>
-
-    <template v-if="!isSQL">
-      <div v-for="(sample, index) of samples" :key="index">
-        <n-flex align="center">
-          <p class="title" :style="style">
-            <n-flex align="center">
-              <Icon icon="streamline-emojis:microscope"></Icon>
-              例子 {{ index + 1 }}
-            </n-flex>
-          </p>
-          <n-button size="small" :type="type(sample.status)" @click="test(sample, index)">
-            {{ label(sample.status, sample.loading) }}
-          </n-button>
-        </n-flex>
-        <n-descriptions bordered :column="2" label-style="width: 50%; min-width: 100px">
-          <n-descriptions-item>
-            <template #label>
-              <n-flex>
-                <span>输入</span>
-                <Copy :value="sample.input" />
-              </n-flex>
-            </template>
-            <div class="testcase">{{ sample.input }}</div>
-          </n-descriptions-item>
-          <n-descriptions-item>
-            <template #label>
-              <n-flex>
-                <span>输出</span>
-                <Copy :value="sample.output" />
-              </n-flex>
-            </template>
-            <div class="testcase">{{ sample.output }}</div>
-          </n-descriptions-item>
-          <n-descriptions-item label="运行结果" v-if="sample.msg">
-            <div class="testcase">{{ sample.msg }}</div>
-          </n-descriptions-item>
-        </n-descriptions>
-      </div>
-    </template>
-
     <div v-if="problem.source">
-      <p class="title" :style="style">
-        <n-flex align="center">
-          <Icon icon="streamline-ultimate-color:book-open-bookmark"></Icon>
-          来源
-        </n-flex>
-      </p>
+      <h3 class="title">
+        <Icon icon="streamline-ultimate-color:book-open-bookmark"></Icon>
+        来源
+      </h3>
       <MdPreview
         preview-theme="vuepress"
         :model-value="problem.source"
@@ -368,12 +367,10 @@ function type(status: ProblemStatus) {
     <!-- 相似题目推荐 -->
     <div v-if="similarProblems.length > 0">
       <n-divider />
-      <p class="title" :style="style">
-        <n-flex align="center">
-          <Icon icon="streamline-ultimate-color:like"></Icon>
-          相似题目推荐
-        </n-flex>
-      </p>
+      <h3 class="title">
+        <Icon icon="streamline-ultimate-color:like"></Icon>
+        相似题目推荐
+      </h3>
       <n-list bordered>
         <n-list-item v-for="sp in similarProblems" :key="sp._id">
           <n-flex align="center" justify="space-between">
@@ -414,28 +411,121 @@ function type(status: ProblemStatus) {
 </template>
 
 <style scoped>
+.problem-head {
+  display: flex;
+  flex-direction: column;
+  gap: 6px;
+  margin-bottom: 12px;
+}
+
 .problemTitle {
   margin: 0;
+  font-size: 22px;
+  line-height: 1.3;
+}
+
+.problem-meta {
+  font-size: 13px;
 }
 
 .title {
-  font-size: 20px;
-  margin: 12px 0;
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  font-size: 16px;
+  font-weight: 600;
+  margin: 20px 0 4px;
 }
 
-.testcase {
-  font-size: 14px;
-  white-space: pre;
-  font-family: "Monaco";
+/* md-editor 的预览自带一圈 padding 和段落外边距，放在小节标题下面显得很散 */
+:deep(.md-editor-preview-wrapper) {
+  padding: 0;
 }
 
-.status-alert {
-  margin-bottom: 16px;
+:deep(.md-editor-preview > :first-child) {
+  margin-top: 0;
+}
+
+:deep(.md-editor-preview > :last-child) {
+  margin-bottom: 0;
+}
+
+.requirements {
+  padding: 10px 12px;
+  border-radius: 6px;
+  border: 1px solid rgba(24, 160, 88, 0.3);
+  background-color: rgba(24, 160, 88, 0.06);
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+}
+
+.requirements-head {
+  font-weight: 600;
+}
+
+.requirements-note {
+  font-size: 12px;
+  font-weight: normal;
+}
+
+.requirements-lang {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  flex-wrap: wrap;
 }
 
 .lang-label {
   font-weight: 600;
-  margin: 8px 0 4px;
+  font-size: 13px;
+}
+
+.sample {
+  margin-top: 20px;
+}
+
+.sample-head {
+  margin-bottom: 8px;
+}
+
+.sample-head .title {
+  margin: 0;
+}
+
+.sample-grid {
+  display: grid;
+  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
+  gap: 8px;
+}
+
+.sample-box {
+  min-width: 0;
+  border-radius: 6px;
+  background-color: rgba(128, 128, 128, 0.08);
+  padding: 6px 10px 10px;
+}
+
+.sample-result {
+  margin-top: 8px;
+}
+
+.sample-label {
+  font-size: 12px;
+  opacity: 0.7;
+  margin-bottom: 4px;
+}
+
+.testcase {
+  margin: 0;
+  font-size: 14px;
+  white-space: pre;
+  overflow-x: auto;
+  font-family: Monaco, Consolas, monospace;
+}
+
+.status-alert {
+  margin-bottom: 16px;
 }
 
 .sqlTableName {
diff --git a/apps/web/src/routes.ts b/apps/web/src/routes.ts
index 8e5ce09..6dc8122 100644
--- a/apps/web/src/routes.ts
+++ b/apps/web/src/routes.ts
@@ -4,7 +4,9 @@ export const ojs: RouteRecordRaw = {
   path: "/",
   component: () => import("shared/layout/default.vue"),
   children: [
-    { path: "", component: () => import("oj/problem/list.vue") },
+    // 登录后是个人首页，没登录还是题目列表（见 oj/home/index.vue）
+    { path: "", component: () => import("oj/home/index.vue"), name: "home" },
+    { path: "problem", component: () => import("oj/problem/list.vue"), name: "problems" },
     {
       path: "problem/:problemID",
       component: () => import("oj/problem/detail.vue"),
diff --git a/apps/web/src/shared/components/Header.vue b/apps/web/src/shared/components/Header.vue
index b2bdf94..90b8308 100644
--- a/apps/web/src/shared/components/Header.vue
+++ b/apps/web/src/shared/components/Header.vue
@@ -83,8 +83,8 @@ const titleTags = computed(() =>
 )
 
 // 一级路径就是菜单 key，对不上的页面（/user、/setting、/achievement 等）
-// 自然没有一项亮着
-const active = computed(() => route.path.split("/")[1] || "problem")
+// 自然没有一项亮着。根路径没登录时就是题目列表，登录了是个人首页，不亮任何一项
+const active = computed(() => route.path.split("/")[1] || (userStore.isAuthed ? "" : "problem"))
 
 async function handleLogout() {
   await userStore.signOut()
@@ -127,7 +127,7 @@ const menus = computed<MenuOption[]>(() => [
     ],
   },
   {
-    label: () => h(RouterLink, { to: "/" }, { default: () => "题目" }),
+    label: () => h(RouterLink, { to: "/problem" }, { default: () => "题目" }),
     key: "problem",
     icon: renderIcon("fluent-emoji:memo"),
   },