diff --git a/src/oj/learn/index.vue b/src/oj/learn/index.vue
index 8989dff..69303ec 100644
--- a/src/oj/learn/index.vue
+++ b/src/oj/learn/index.vue
@@ -207,8 +207,11 @@ watch(
 </script>
 
 <style scoped>
-.learn-container {
-  height: calc(100vh - 138px);
+/* 桌面端固定高度，让目录/内容/代码三栏各自内部滚动；移动端不限高，交给页面整体滚动 */
+@media (min-width: 769px) {
+  .learn-container {
+    height: calc(100vh - 138px);
+  }
 }
 
 .learn-grid {
diff --git a/src/oj/problem/components/Form.vue b/src/oj/problem/components/Form.vue
index 5bc9a77..6ea28cc 100644
--- a/src/oj/problem/components/Form.vue
+++ b/src/oj/problem/components/Form.vue
@@ -72,6 +72,57 @@ const showGoSubmissionButton = computed(() => {
   else return false
 })
 
+// 移动端把「提交信息 / 统计信息 / 复制代码 / 重置代码」收进下拉菜单，节省横向空间
+const renderIcon = (icon: string) => () => h(Icon, { icon, width: 18 })
+
+const mobileMenuOptions = computed<DropdownOption[]>(() => {
+  const options: DropdownOption[] = []
+  if (showGoSubmissionButton.value) {
+    options.push({
+      label: "提交信息",
+      key: "submissions",
+      icon: renderIcon("streamline-ultimate-color:task-list-text-1"),
+    })
+  }
+  if (userStore.isTeacherOrAbove) {
+    options.push({
+      label: "统计信息",
+      key: "statistics",
+      icon: renderIcon("streamline-ultimate-color:analytics-pie-2"),
+    })
+  }
+  if (codeStore.code.language !== "Flowchart") {
+    options.push({
+      label: "复制代码",
+      key: "copy",
+      icon: renderIcon("streamline-ultimate-color:copy-paste-1"),
+    })
+    options.push({
+      label: "重置代码",
+      key: "reset",
+      icon: renderIcon("streamline-ultimate-color:synchronize-arrow"),
+    })
+  }
+  return options
+})
+
+const handleMobileSelect = (key: string) => {
+  switch (key) {
+    case "submissions":
+      goSubmissions()
+      break
+    case "statistics":
+      statisticPanel.value = true
+      break
+    case "copy":
+      copy()
+      break
+    case "reset":
+      reset()
+      break
+  }
+}
+
 const languageOptions: DropdownOption[] = languages.value.map((it) => ({
   label: () =>
     h(NFlex, { align: "center" }, () => [
@@ -161,14 +212,14 @@ onMounted(() => {
     <SubmitCode v-else />
 
     <IconButton
-      v-if="showGoSubmissionButton"
+      v-if="isDesktop && showGoSubmissionButton"
       icon="streamline-ultimate-color:task-list-text-1"
       tip="提交信息"
       @click="goSubmissions"
     />
 
     <IconButton
-      v-if="userStore.isTeacherOrAbove"
+      v-if="isDesktop && userStore.isTeacherOrAbove"
       icon="streamline-ultimate-color:analytics-pie-2"
       tip="统计信息"
       @click="statisticPanel = true"
@@ -183,18 +234,35 @@ onMounted(() => {
       />
 
       <IconButton
+        v-if="isDesktop"
         icon="streamline-ultimate-color:copy-paste-1"
         tip="复制代码"
         @click="copy"
       />
 
       <IconButton
+        v-if="isDesktop"
         icon="streamline-ultimate-color:synchronize-arrow"
         tip="重置代码"
         @click="reset"
       />
     </template>
 
+    <!-- 移动端：提交信息 / 统计信息 / 复制代码 / 重置代码 收进下拉菜单 -->
+    <n-dropdown
+      v-if="!isDesktop && mobileMenuOptions.length"
+      trigger="click"
+      :options="mobileMenuOptions"
+      @select="handleMobileSelect"
+    >
+      <n-button round size="small">
+        更多
+        <template #icon>
+          <Icon icon="streamline-ultimate-color:navigation-menu-vertical" />
+        </template>
+      </n-button>
+    </n-dropdown>
+
     <template v-if="showSyncFeature">
       <IconButton
         :icon="
diff --git a/src/shared/components/Beian.vue b/src/shared/components/Beian.vue
index e016060..63119e2 100644
--- a/src/shared/components/Beian.vue
+++ b/src/shared/components/Beian.vue
@@ -3,12 +3,15 @@
     v-if="!hiddenICP"
     justify="center"
     align="center"
-    :vertical="isMobile"
+    :size="isMobile ? 4 : 'medium'"
+    :wrap="false"
     class="beian"
+    :class="{ 'beian--mobile': isMobile }"
   >
-    <n-flex justify="center" align="center" :vertical="isMobile" size="small">
-      <n-text>&copy; 2022 - 2026 判题狗 保留所有权利</n-text>
-      <n-button text @click="goCC">CC BY-NC 4.0</n-button>
+    <n-flex justify="center" align="center" :size="isMobile ? 4 : 'small'">
+      <n-text>{{ copyrightText }}</n-text>
+      <!-- 移动端隐藏 CC 链接，腾出空间让备案号挤进一行 -->
+      <n-button v-if="!isMobile" text @click="goCC">CC BY-NC 4.0</n-button>
     </n-flex>
     <n-button text @click="goICP">浙ICP备2023044109号-1</n-button>
     <n-button text @click="goPublicSecurity">
@@ -25,6 +28,14 @@ const hiddenICP = computed(() =>
   ["problem", "contest problem"].includes(route.name as string),
 )
 
+// 移动端精简版权文案，配合小号字体挤进一行；结束年份取当前年份
+const currentYear = new Date().getFullYear()
+const copyrightText = computed(() =>
+  isMobile.value
+    ? `© ${currentYear} 判题狗`
+    : `© 2022 - ${currentYear} 判题狗 保留所有权利`,
+)
+
 function goICP() {
   window.open("https://beian.miit.gov.cn", "_blank")
 }
@@ -47,4 +58,17 @@ function goPublicSecurity() {
 .beian {
   margin: 12px 0;
 }
+
+/* 移动端：单行 + 小号字体，超宽时容器内部横向滚动，不撑破页面 */
+.beian--mobile {
+  font-size: 12px;
+  max-width: 100%;
+  overflow-x: auto;
+  padding: 0 8px;
+}
+
+.beian--mobile :deep(.n-button__content),
+.beian--mobile :deep(.n-text) {
+  font-size: 12px;
+}
 </style>