diff --git a/src/oj/problem/components/ProblemInfo.vue b/src/oj/problem/components/ProblemInfo.vue
index 441041c..aac8b1f 100644
--- a/src/oj/problem/components/ProblemInfo.vue
+++ b/src/oj/problem/components/ProblemInfo.vue
@@ -71,7 +71,7 @@ const options = {
       </n-space>
     </n-descriptions-item>
   </n-descriptions>
-  <div class="pie">
+  <div class="pie" v-if="problem.submission_number > 0">
     <Pie :data="data" :options="options" />
   </div>
 </template>
diff --git a/src/oj/problem/components/Submit.vue b/src/oj/problem/components/Submit.vue
index 4046051..3e95dda 100644
--- a/src/oj/problem/components/Submit.vue
+++ b/src/oj/problem/components/Submit.vue
@@ -8,10 +8,12 @@ import { Problem, Submission, SubmitCodePayload } from "utils/types"
 import { getSubmission, submitCode } from "oj/api"
 import SubmissionResultTag from "~/shared/SubmissionResultTag.vue"
 import type { DataTableColumn } from "naive-ui"
+import { useUserStore } from "~/shared/store/user"
+
+const userStore = useUserStore()
+const route = useRoute()
 
 const problem = inject<Ref<Problem>>("problem")
-
-const route = useRoute()
 const contestID = <string>route.params.contestID ?? ""
 
 const submissionId = ref("")
@@ -60,6 +62,9 @@ const submitting = computed(
 )
 
 const submitDisabled = computed(() => {
+  if (!userStore.isAuthed) {
+    return true
+  }
   const value = code.value
   if (
     value.trim() === "" ||
@@ -81,6 +86,9 @@ const submitDisabled = computed(() => {
 })
 
 const submitLabel = computed(() => {
+  if (!userStore.isAuthed) {
+    return "请先登录"
+  }
   if (submitting.value) {
     return "正在提交"
   }
@@ -154,6 +162,9 @@ const columns: DataTableColumn<Submission["info"]["data"][number]>[] = [
 ]
 
 async function submit() {
+  if (!userStore.isAuthed) {
+    return
+  }
   const data: SubmitCodePayload = {
     problem_id: problem!.value.id,
     language: code.language,
diff --git a/src/oj/problem/detail.vue b/src/oj/problem/detail.vue
index 20ff63c..bdfa5b7 100644
--- a/src/oj/problem/detail.vue
+++ b/src/oj/problem/detail.vue
@@ -41,7 +41,7 @@ provide("problem", readonly(problem))
   <n-grid v-if="problem" x-gap="16" :cols="2">
     <n-gi :span="isDesktop ? 1 : 2">
       <n-scrollbar v-if="isDesktop" style="max-height: calc(100vh - 92px)">
-        <n-tabs default-value="content">
+        <n-tabs default-value="content" type="segment">
           <n-tab-pane name="content" tab="题目描述">
             <ProblemContent :problem="problem" />
           </n-tab-pane>
@@ -50,7 +50,7 @@ provide("problem", readonly(problem))
           </n-tab-pane>
         </n-tabs>
       </n-scrollbar>
-      <n-tabs v-else default-value="content">
+      <n-tabs v-else default-value="content" type="segment">
         <n-tab-pane name="content" tab="题目描述">
           <ProblemContent :problem="problem" />
         </n-tab-pane>
diff --git a/src/oj/problem/list.vue b/src/oj/problem/list.vue
index 825648d..6e24c9a 100644
--- a/src/oj/problem/list.vue
+++ b/src/oj/problem/list.vue
@@ -2,7 +2,7 @@
 import { useUserStore } from "~/shared/store/user"
 import { filterEmptyValue, getTagColor } from "utils/functions"
 import { ProblemFiltered } from "utils/types"
-import { isDesktop } from "~/shared/composables/breakpoints"
+import { isMobile } from "~/shared/composables/breakpoints"
 import { getProblemList, getRandomProblemID } from "oj/api"
 import Pagination from "~/shared/Pagination.vue"
 import { DataTableColumn, NSpace, NTag } from "naive-ui"
@@ -169,25 +169,33 @@ function rowProps(row: ProblemFiltered) {
 </script>
 
 <template>
-  <n-form :inline="isDesktop" label-placement="left">
-    <n-form-item label="难度">
-      <n-select
-        class="select"
-        v-model:value="query.difficulty"
-        :options="difficultyOptions"
-      />
-    </n-form-item>
-    <n-form-item>
-      <n-input placeholder="输入编号或标题后回车" clearable @change="search" />
-    </n-form-item>
-    <n-form-item>
-      <n-space>
-        <n-button @click="search(query.keyword)">搜索</n-button>
-        <n-button @click="clear">重置</n-button>
-        <n-button @click="getRandom">随机一题</n-button>
-      </n-space>
-    </n-form-item>
-  </n-form>
+  <n-space :vertical="isMobile">
+    <n-form inline label-placement="left">
+      <n-form-item label="难度">
+        <n-select
+          class="select"
+          v-model:value="query.difficulty"
+          :options="difficultyOptions"
+        />
+      </n-form-item>
+      <n-form-item>
+        <n-input
+          placeholder="输入编号或标题后回车"
+          clearable
+          @change="search"
+        />
+      </n-form-item>
+    </n-form>
+    <n-form inline label-placement="left">
+      <n-form-item>
+        <n-space>
+          <n-button @click="search(query.keyword)">搜索</n-button>
+          <n-button @click="clear">重置</n-button>
+          <n-button @click="getRandom">随机一题</n-button>
+        </n-space>
+      </n-form-item>
+    </n-form>
+  </n-space>
   <n-space>
     <div class="tagTitle">标签</div>
     <n-button
diff --git a/src/shared/layout/default.vue b/src/shared/layout/default.vue
index 3119b6d..fb55864 100644
--- a/src/shared/layout/default.vue
+++ b/src/shared/layout/default.vue
@@ -5,7 +5,7 @@ import Header from "../Header.vue"
 </script>
 
 <template>
-  <n-layout position="absolute">
+  <n-layout>
     <n-layout-header bordered class="header">
       <Header />
     </n-layout-header>