diff --git a/frontend/src/components/base/BaseCard.vue b/frontend/src/components/base/BaseCard.vue
index 39323647e..c8ad598c5 100644
--- a/frontend/src/components/base/BaseCard.vue
+++ b/frontend/src/components/base/BaseCard.vue
@@ -1,14 +1,15 @@
 <script setup lang="ts">
 import { computed } from 'vue'
 
-type CardVariant = 'default' | 'dashboard' | 'elevated'
+type CardPadding = 'default' | 'compact'
+type CardLayout = 'content' | 'flush'
 type HeaderCollapseAt = 'sm' | 'lg' | 'none'
 
 const props = withDefaults(
   defineProps<{
     as?: keyof HTMLElementTagNameMap
-    padded?: boolean
-    variant?: CardVariant
+    padding?: CardPadding
+    layout?: CardLayout
     title?: string
     description?: string
     headerCollapseAt?: HeaderCollapseAt
@@ -17,8 +18,8 @@ const props = withDefaults(
   }>(),
   {
     as: 'section',
-    padded: true,
-    variant: 'default',
+    padding: 'default',
+    layout: 'content',
     title: undefined,
     description: undefined,
     headerCollapseAt: 'sm',
@@ -36,16 +37,9 @@ const slots = defineSlots<{
   default?: () => unknown
 }>()
 
-const paddingClasses: Record<CardVariant, string> = {
-  default: 'px-5 py-3',
-  dashboard: 'px-7 py-5.5',
-  elevated: 'px-5 py-3',
-}
-
-const shadowClasses: Record<CardVariant, string> = {
-  default: 'shadow-(--cp-shadow-card)',
-  dashboard: 'shadow-(--cp-shadow-card)',
-  elevated: 'shadow-(--cp-shadow-popover)',
+const paddingClasses: Record<CardPadding, string> = {
+  default: 'p-5.5',
+  compact: 'p-4',
 }
 
 const hasManagedHeader = computed(
@@ -53,6 +47,12 @@ const hasManagedHeader = computed(
     !!props.title || !!props.description || !!slots.actions || !!slots.title || !!slots.description,
 )
 
+const outerPaddingClass = computed(() => {
+  if (props.layout === 'flush')
+    return undefined
+  return paddingClasses[props.padding]
+})
+
 const managedHeaderLayoutClasses = computed(() => {
   if (props.headerCollapseAt === 'none') {
     return 'flex items-start justify-between gap-3'
@@ -69,14 +69,17 @@ const managedHeaderLayoutClasses = computed(() => {
 <template>
   <component
     :is="props.as"
-    class="[--cp-input-current-bg:var(--cp-input-soft-bg)] [--cp-input-current-bg-hover:var(--cp-input-soft-bg-hover)] overflow-hidden bg-(--cp-bg-surface) rounded-(--cp-card-radius)"
+    class="[--cp-input-current-bg:var(--cp-input-soft-bg)] [--cp-input-current-bg-hover:var(--cp-input-soft-bg-hover)] overflow-hidden rounded-(--cp-card-radius) bg-(--cp-bg-surface) shadow-(--cp-shadow-card)"
     :class="[
-      shadowClasses[props.variant],
-      props.padded ? paddingClasses[props.variant] : undefined,
+      outerPaddingClass,
     ]"
   >
     <template v-if="$slots.header || hasManagedHeader || $slots.body">
-      <header v-if="$slots.header || hasManagedHeader" class="shrink-0" :class="props.headerClass">
+      <header
+        v-if="$slots.header || hasManagedHeader"
+        class="shrink-0"
+        :class="props.headerClass"
+      >
         <slot name="header">
           <div :class="managedHeaderLayoutClasses">
             <div class="min-w-0 pt-0.5">
@@ -105,7 +108,10 @@ const managedHeaderLayoutClasses = computed(() => {
         </slot>
       </header>
 
-      <div v-if="$slots.body || $slots.default" :class="props.bodyClass">
+      <div
+        v-if="$slots.body || $slots.default"
+        :class="props.bodyClass"
+      >
         <slot name="body">
           <slot />
         </slot>
diff --git a/frontend/src/components/base/BasePageHeader.vue b/frontend/src/components/base/BasePageHeader.vue
index 6ed8f5cfc..9e0b90dc8 100644
--- a/frontend/src/components/base/BasePageHeader.vue
+++ b/frontend/src/components/base/BasePageHeader.vue
@@ -1,12 +1,20 @@
 <script setup lang="ts">
-defineProps<{
+const props = defineProps<{
   title: string
   description?: string
+  actionsInline?: boolean
 }>()
 </script>
 
 <template>
-  <header class="grid min-h-17 shrink-0 grid-cols-[minmax(0,1fr)_auto] items-start gap-x-4 gap-y-3">
+  <header
+    class="grid min-h-17 shrink-0 items-start"
+    :class="
+      props.actionsInline
+        ? 'grid-cols-[minmax(0,1fr)_auto] gap-x-4'
+        : 'grid-cols-1 gap-y-3 sm:grid-cols-[minmax(0,1fr)_auto] sm:gap-x-4'
+    "
+  >
     <div class="min-w-0">
       <h1 class="m-0 text-[34px] leading-[1.15] font-extrabold text-(--cp-text-primary)">
         {{ title }}
@@ -23,6 +31,7 @@ defineProps<{
     <div
       v-if="$slots.actions"
       class="mt-0.5 flex shrink-0 items-center justify-end gap-2"
+      :class="props.actionsInline ? undefined : 'max-sm:w-full'"
     >
       <slot name="actions" />
     </div>
diff --git a/frontend/src/views/accounts/components/AccountFilters.vue b/frontend/src/views/accounts/components/AccountFilters.vue
index fb6bdd76e..864b59fb5 100644
--- a/frontend/src/views/accounts/components/AccountFilters.vue
+++ b/frontend/src/views/accounts/components/AccountFilters.vue
@@ -54,10 +54,13 @@ const provider = defineModel<string>('provider', { required: true })
       />
     </div>
 
-    <div class="flex shrink-0 self-end items-center justify-end gap-2 md:ml-auto">
+    <div
+      class="grid w-full grid-cols-2 gap-2 md:flex md:w-auto md:shrink-0 md:self-end md:items-center md:justify-end md:ml-auto"
+    >
       <BaseButton
         v-if="selectedCount > 0"
         variant="danger"
+        class="w-full whitespace-nowrap md:w-auto"
         :disabled="batchDeleting"
         @click="emit('deleteSelected')"
       >
@@ -67,13 +70,19 @@ const provider = defineModel<string>('provider', { required: true })
       <BaseButton
         v-if="selectedCount > 0"
         variant="default"
+        class="w-full whitespace-nowrap md:w-auto"
         :loading="exportingAccounts"
         @click="emit('exportSelected')"
       >
         <Download class="size-4" />
         导出选中 ({{ selectedCount }})
       </BaseButton>
-      <BaseButton variant="primary" @click="emit('create')">
+      <BaseButton
+        variant="primary"
+        class="whitespace-nowrap md:w-auto"
+        :class="selectedCount > 0 ? 'col-span-2 w-full' : 'col-span-2 justify-self-end'"
+        @click="emit('create')"
+      >
         <Upload class="size-4" />
         导入账号
       </BaseButton>
diff --git a/frontend/src/views/accounts/components/AccountOverviewCards.vue b/frontend/src/views/accounts/components/AccountOverviewCards.vue
index 98b3003ec..f3c98bce5 100644
--- a/frontend/src/views/accounts/components/AccountOverviewCards.vue
+++ b/frontend/src/views/accounts/components/AccountOverviewCards.vue
@@ -65,16 +65,15 @@ function overviewIconClass(tone: string) {
       v-for="item in overviewItems"
       :key="item.label"
       as="article"
-      :padded="false"
-      class="h-24"
+      padding="compact"
     >
-      <div class="flex h-full items-stretch justify-between gap-3 px-5 py-3">
-        <div class="flex min-w-0 flex-col justify-between">
+      <div class="flex items-stretch justify-between gap-3">
+        <div class="flex min-w-0 flex-col">
           <p class="m-0 text-[12px] leading-none font-heavy text-(--cp-text-secondary)">
             {{ item.label }}
           </p>
           <strong
-            class="block font-mono text-[26px] leading-none font-extrabold text-(--cp-text-primary)"
+            class="my-2 block font-mono text-[26px] leading-none font-extrabold text-(--cp-text-primary)"
           >
             {{ item.value }}
           </strong>
diff --git a/frontend/src/views/accounts/index.vue b/frontend/src/views/accounts/index.vue
index 86455bd3e..0e39fb13b 100644
--- a/frontend/src/views/accounts/index.vue
+++ b/frontend/src/views/accounts/index.vue
@@ -126,10 +126,8 @@ const {
     <AccountOverviewCards :summary="accountSummary" />
 
     <BaseCard
-      :padded="false"
-      class="mt-4 flex h-[calc(100dvh-248px)] min-h-125 flex-col"
-      header-class="px-4 pt-4 pb-2 md:px-5"
-      body-class="flex min-h-0 flex-1 px-4 pb-3 md:px-5"
+      class="mt-4 flex h-[calc(100dvh-250px)] min-h-125 flex-col"
+      body-class="mt-3 flex min-h-0 flex-1"
     >
       <template #header>
         <AccountFilters
diff --git a/frontend/src/views/api-keys/components/ApiKeyFilters.vue b/frontend/src/views/api-keys/components/ApiKeyFilters.vue
index ec1e75107..892edc687 100644
--- a/frontend/src/views/api-keys/components/ApiKeyFilters.vue
+++ b/frontend/src/views/api-keys/components/ApiKeyFilters.vue
@@ -19,11 +19,11 @@ const search = defineModel<string>('search', { required: true })
 
 <template>
   <div
-    class="flex w-full flex-col gap-3 md:flex-row md:flex-wrap md:items-center"
+    class="flex w-full flex-wrap items-center gap-3"
     role="group"
     aria-label="API Key 筛选与操作"
   >
-    <div class="min-w-0 w-full md:w-96 md:flex-none">
+    <div class="min-w-0 flex-1 md:w-96 md:flex-none">
       <BaseInput v-model="search" placeholder="搜索名称、标签或 ID" class="w-full">
         <template #prefix>
           <Search class="size-4.5 text-(--cp-text-tertiary)" />
@@ -31,7 +31,7 @@ const search = defineModel<string>('search', { required: true })
       </BaseInput>
     </div>
 
-    <div class="flex shrink-0 self-end items-center justify-end gap-2 md:ml-auto">
+    <div class="flex shrink-0 items-center justify-end gap-2 md:ml-auto">
       <BaseButton
         v-if="selectedCount > 0"
         variant="danger"
diff --git a/frontend/src/views/api-keys/index.vue b/frontend/src/views/api-keys/index.vue
index 85a955a4a..8ec56a81a 100644
--- a/frontend/src/views/api-keys/index.vue
+++ b/frontend/src/views/api-keys/index.vue
@@ -88,10 +88,8 @@ const {
     />
 
     <BaseCard
-      :padded="false"
       class="mt-5 flex h-[calc(100dvh-136px)] min-h-125 flex-col"
-      header-class="px-5 pt-4"
-      body-class="flex min-h-0 flex-1 px-5 py-3"
+      body-class="mt-3 flex min-h-0 flex-1"
     >
       <template #header>
         <ApiKeyFilters
diff --git a/frontend/src/views/dashboard/components/AccountOverviewCard.vue b/frontend/src/views/dashboard/components/AccountOverviewCard.vue
index a13d9632a..d7b321f1e 100644
--- a/frontend/src/views/dashboard/components/AccountOverviewCard.vue
+++ b/frontend/src/views/dashboard/components/AccountOverviewCard.vue
@@ -90,7 +90,9 @@ const statusRows = computed(() => {
   }
   const active = p?.active ?? 0
   const refreshing = p?.refreshing ?? 0
-  const quota = p?.quotaExhausted ?? 0
+  const rateLimited = p?.rateLimited ?? 0
+  const quotaExhausted = p?.quotaExhausted ?? 0
+  const quotaLimited = rateLimited + quotaExhausted
   const expired = p?.expired ?? 0
   const invalid = p?.invalid ?? 0
   const disabled = p?.disabled ?? 0
@@ -113,16 +115,9 @@ const statusRows = computed(() => {
       icon: RefreshCw,
     },
     {
-      label: '限流中',
-      description: '任一额度窗口已触顶',
-      value: String(p?.rateLimited ?? 0),
-      tone: 'warning',
-      icon: TriangleAlert,
-    },
-    {
-      label: '配额耗尽',
-      description: '已确认 402 耗尽',
-      value: String(quota),
+      label: '额度受限',
+      description: `限流中 ${rateLimited} · 配额耗尽 ${quotaExhausted}`,
+      value: String(quotaLimited),
       tone: 'warning',
       icon: TriangleAlert,
     },
@@ -149,23 +144,21 @@ const statusBars = computed(() => {
     return []
   const active = (p.active / p.total) * 100
   const refreshing = ((p.refreshing ?? 0) / p.total) * 100
-  const rateLimited = ((p.rateLimited ?? 0) / p.total) * 100
-  const quota = (p.quotaExhausted / p.total) * 100
+  const quotaLimited = (((p.rateLimited ?? 0) + p.quotaExhausted) / p.total) * 100
   const unavailable = ((p.expired + (p.invalid ?? 0) + p.disabled + p.banned) / p.total) * 100
   return [
     { pct: active, cls: 'bg-(--cp-success)' },
     { pct: refreshing, cls: 'bg-(--cp-normal)' },
-    { pct: rateLimited, cls: 'bg-(--cp-warning)' },
-    { pct: quota, cls: 'bg-(--cp-warning)' },
+    { pct: quotaLimited, cls: 'bg-(--cp-warning)' },
     { pct: unavailable, cls: 'bg-(--cp-danger)' },
   ].filter(b => b.pct > 0)
 })
 </script>
 
 <template>
-  <BaseCard as="article" :padded="false" class="w-full xl:h-112.5">
+  <BaseCard as="article" class="w-full xl:h-112.5">
     <div
-      class="grid px-4 pt-5 pb-6 lg:px-7 lg:pt-6 xl:grid-cols-[minmax(0,0.9fr)_minmax(0,1.28fr)_minmax(280px,0.9fr)] xl:gap-7 xl:pb-0"
+      class="grid xl:grid-cols-[minmax(0,0.9fr)_minmax(0,1.28fr)_minmax(280px,0.9fr)] xl:gap-7"
     >
       <section class="min-w-0 w-full pb-6 xl:h-100.5 xl:pb-0">
         <h2 class="m-0 text-xl leading-[1.15] font-heavy text-(--cp-text-primary)">
diff --git a/frontend/src/views/dashboard/components/MetricCard.vue b/frontend/src/views/dashboard/components/MetricCard.vue
index ab488bfc6..040078a49 100644
--- a/frontend/src/views/dashboard/components/MetricCard.vue
+++ b/frontend/src/views/dashboard/components/MetricCard.vue
@@ -69,7 +69,7 @@ const sparklineOption = computed<EChartsOption | null>(() => {
 </script>
 
 <template>
-  <BaseCard as="article" :padded="false" class="relative h-38.5 w-full px-6 pt-5">
+  <BaseCard as="article" padding="compact" class="relative h-38.5 w-full">
     <div class="flex items-start gap-3">
       <BaseMotionIcon
         aria-hidden="true"
diff --git a/frontend/src/views/dashboard/components/RequestHealthTimelineCard.vue b/frontend/src/views/dashboard/components/RequestHealthTimelineCard.vue
index 64d57f0dc..d90f276cb 100644
--- a/frontend/src/views/dashboard/components/RequestHealthTimelineCard.vue
+++ b/frontend/src/views/dashboard/components/RequestHealthTimelineCard.vue
@@ -207,7 +207,6 @@ onBeforeUnmount(() => {
 <template>
   <BaseCard
     as="article"
-    variant="dashboard"
     :title="timeline.title"
     :description="timeline.description"
     header-collapse-at="lg"
diff --git a/frontend/src/views/dashboard/components/RequestTrendCard.vue b/frontend/src/views/dashboard/components/RequestTrendCard.vue
index 82136306e..7c4fe8107 100644
--- a/frontend/src/views/dashboard/components/RequestTrendCard.vue
+++ b/frontend/src/views/dashboard/components/RequestTrendCard.vue
@@ -39,7 +39,7 @@ const {
 </script>
 
 <template>
-  <BaseCard as="article" variant="dashboard" title="使用趋势" class="min-h-95 w-full">
+  <BaseCard as="article" title="使用趋势" class="min-h-95 w-full">
     <template #actions>
       <BaseSegmented
         v-model="activeKind"
diff --git a/frontend/src/views/dashboard/components/UsageRecordCard.vue b/frontend/src/views/dashboard/components/UsageRecordCard.vue
index 7d2696a07..e2adc2803 100644
--- a/frontend/src/views/dashboard/components/UsageRecordCard.vue
+++ b/frontend/src/views/dashboard/components/UsageRecordCard.vue
@@ -17,7 +17,6 @@ const dashboardUsageRecordColumns = usageRecordColumns.filter(column => column.k
 <template>
   <BaseCard
     as="article"
-    variant="dashboard"
     title="使用记录"
     description="最近 10 条成功请求"
     class="h-117 w-full"
diff --git a/frontend/src/views/dashboard/components/WireProfileCard.vue b/frontend/src/views/dashboard/components/WireProfileCard.vue
index acab0128f..4f2df3d9f 100644
--- a/frontend/src/views/dashboard/components/WireProfileCard.vue
+++ b/frontend/src/views/dashboard/components/WireProfileCard.vue
@@ -171,7 +171,6 @@ function providerLabel(provider: string) {
 <template>
   <BaseCard
     as="article"
-    variant="dashboard"
     title="上游请求身份"
     body-class="flex min-h-0 flex-1 flex-col"
     class="flex min-h-95 w-full flex-col"
diff --git a/frontend/src/views/dashboard/index.vue b/frontend/src/views/dashboard/index.vue
index fa5bb49b6..5c41d88fb 100644
--- a/frontend/src/views/dashboard/index.vue
+++ b/frontend/src/views/dashboard/index.vue
@@ -35,7 +35,7 @@ const {
 
 <template>
   <div class="w-full">
-    <BasePageHeader title="系统概览">
+    <BasePageHeader title="系统概览" actions-inline>
       <template #description>
         <span>当日统计</span>
         <DashboardHeartbeat :updated-at="lastRefreshedAt" />
diff --git a/frontend/src/views/login/components/LoginPanel.vue b/frontend/src/views/login/components/LoginPanel.vue
index c8da5c437..65f5dee7b 100644
--- a/frontend/src/views/login/components/LoginPanel.vue
+++ b/frontend/src/views/login/components/LoginPanel.vue
@@ -48,8 +48,7 @@ function togglePasswordVisible(): void {
 <template>
   <BaseCard
     as="form"
-    :padded="false"
-    variant="elevated"
+    layout="flush"
     class="login-form relative grid min-h-129.25 w-[min(440px,100%)] gap-3 rounded-lg px-7.5 pt-6.5 pb-6 max-[560px]:min-h-auto max-[560px]:gap-3 max-[560px]:p-5.5"
     @submit.prevent="emit('submit')"
   >
diff --git a/frontend/src/views/settings/components/AdminApiKeyCard.vue b/frontend/src/views/settings/components/AdminApiKeyCard.vue
index 2beeaec0d..97e633830 100644
--- a/frontend/src/views/settings/components/AdminApiKeyCard.vue
+++ b/frontend/src/views/settings/components/AdminApiKeyCard.vue
@@ -26,11 +26,9 @@ const emit = defineEmits<{
 
 <template>
   <BaseCard
-    :padded="false"
     title="管理员 API Key"
     description="用于外部系统集成，具有管理员权限"
-    header-class="px-5 pt-4"
-    body-class="px-5 py-5"
+    body-class="mt-5"
   >
     <template #actions>
       <div class="flex flex-wrap items-center gap-2">
diff --git a/frontend/src/views/settings/components/ModelAliasesCard.vue b/frontend/src/views/settings/components/ModelAliasesCard.vue
index d252089e7..eefc545de 100644
--- a/frontend/src/views/settings/components/ModelAliasesCard.vue
+++ b/frontend/src/views/settings/components/ModelAliasesCard.vue
@@ -23,11 +23,9 @@ const emit = defineEmits<{
 
 <template>
   <BaseCard
-    :padded="false"
     title="模型映射"
     description="配置请求模型与上游模型的映射关系"
-    header-class="px-5 pt-4"
-    body-class="px-5 py-5"
+    body-class="mt-5"
   >
     <div class="grid gap-4">
       <div class="flex flex-wrap items-center gap-3">
diff --git a/frontend/src/views/settings/components/RotationStrategyCard.vue b/frontend/src/views/settings/components/RotationStrategyCard.vue
index 5201bc61c..47d43d09a 100644
--- a/frontend/src/views/settings/components/RotationStrategyCard.vue
+++ b/frontend/src/views/settings/components/RotationStrategyCard.vue
@@ -14,11 +14,9 @@ const model = defineModel<RotationStrategy | ''>({ required: true })
 
 <template>
   <BaseCard
-    :padded="false"
     title="调度策略"
     description="决定每次请求如何调度账号池"
-    header-class="px-5 pt-4"
-    body-class="px-5 py-5"
+    body-class="mt-5"
   >
     <div class="grid max-w-6xl gap-3 lg:grid-cols-4">
       <button
diff --git a/frontend/src/views/settings/components/RuntimeSettingsCard.vue b/frontend/src/views/settings/components/RuntimeSettingsCard.vue
index 646c3ff4b..0daef7b2f 100644
--- a/frontend/src/views/settings/components/RuntimeSettingsCard.vue
+++ b/frontend/src/views/settings/components/RuntimeSettingsCard.vue
@@ -14,11 +14,9 @@ const requestIntervalMs = defineModel<string>('requestIntervalMs', { required: t
 
 <template>
   <BaseCard
-    :padded="false"
     title="运行参数"
     description="请求节奏、账号并发和 Token 刷新"
-    header-class="px-5 pt-4"
-    body-class="px-5 py-5"
+    body-class="mt-5"
   >
     <BaseForm :columns="2" class="max-w-6xl">
       <BaseFormItem
diff --git a/frontend/src/views/settings/components/backup/BackupRecordsCard.vue b/frontend/src/views/settings/components/backup/BackupRecordsCard.vue
index 7749e7822..f247aeece 100644
--- a/frontend/src/views/settings/components/backup/BackupRecordsCard.vue
+++ b/frontend/src/views/settings/components/backup/BackupRecordsCard.vue
@@ -90,11 +90,9 @@ function canDelete(record: BackupRecord): boolean {
 
 <template>
   <BaseCard
-    :padded="false"
     title="备份记录"
     description="创建手动备份和管理已有备份记录"
-    header-class="px-5 pt-4"
-    body-class="px-5 py-3"
+    body-class="mt-3"
   >
     <template #actions>
       <div class="flex flex-wrap items-center gap-2">
diff --git a/frontend/src/views/settings/components/backup/BackupScheduleCard.vue b/frontend/src/views/settings/components/backup/BackupScheduleCard.vue
index 3f61ee3ff..8b8ab4373 100644
--- a/frontend/src/views/settings/components/backup/BackupScheduleCard.vue
+++ b/frontend/src/views/settings/components/backup/BackupScheduleCard.vue
@@ -40,11 +40,9 @@ const TIMEZONE_OPTIONS = [
 
 <template>
   <BaseCard
-    :padded="false"
     title="定时备份"
     description="配置自动定时备份"
-    header-class="px-5 pt-4"
-    body-class="px-5 py-5"
+    body-class="mt-5"
   >
     <template #actions>
       <BaseButton variant="primary" :loading="saving" :disabled="loading" @click="emit('save')">
diff --git a/frontend/src/views/settings/components/backup/BackupStorageCard.vue b/frontend/src/views/settings/components/backup/BackupStorageCard.vue
index 5c0a00196..c38f3b757 100644
--- a/frontend/src/views/settings/components/backup/BackupStorageCard.vue
+++ b/frontend/src/views/settings/components/backup/BackupStorageCard.vue
@@ -51,10 +51,8 @@ function toggleSecretVisible(): void {
 
 <template>
   <BaseCard
-    :padded="false"
     title="S3 存储配置"
-    header-class="px-5 pt-4"
-    body-class="px-5 py-5"
+    body-class="mt-5"
   >
     <template #description>
       <span class="text-(--cp-text-secondary)">
diff --git a/frontend/src/views/settings/index.vue b/frontend/src/views/settings/index.vue
index 38f54be8a..42529af78 100644
--- a/frontend/src/views/settings/index.vue
+++ b/frontend/src/views/settings/index.vue
@@ -71,24 +71,9 @@ watch(
 
 <template>
   <div class="w-full">
-    <BasePageHeader title="系统设置" description="管理运行参数、调度策略、模型映射与备份配置">
-      <template #actions>
-        <BaseButton
-          v-if="section === 'runtime'"
-          variant="primary"
-          :loading="saving"
-          :disabled="loading"
-          @click="saveSettings"
-        >
-          <template #icon>
-            <Save class="size-4" />
-          </template>
-          {{ saving ? '保存中...' : '保存' }}
-        </BaseButton>
-      </template>
-    </BasePageHeader>
+    <BasePageHeader title="系统设置" description="管理运行参数、调度策略、模型映射与备份配置" />
 
-    <div class="mt-4">
+    <div class="mt-4 flex flex-wrap items-center justify-between gap-3">
       <BaseSegmented
         :model-value="section"
         class="bg-(--cp-input-soft-bg)!"
@@ -99,6 +84,18 @@ watch(
         aria-label="设置分区"
         @update:model-value="switchSection"
       />
+      <BaseButton
+        v-if="section === 'runtime'"
+        variant="primary"
+        :loading="saving"
+        :disabled="loading"
+        @click="saveSettings"
+      >
+        <template #icon>
+          <Save class="size-4" />
+        </template>
+        {{ saving ? '保存中...' : '保存' }}
+      </BaseButton>
     </div>
 
     <div v-show="section === 'runtime'" class="mt-5 grid w-full gap-5">
diff --git a/frontend/src/views/usage/components/UsageCostCard.vue b/frontend/src/views/usage/components/UsageCostCard.vue
index a531c7aea..62f6505d8 100644
--- a/frontend/src/views/usage/components/UsageCostCard.vue
+++ b/frontend/src/views/usage/components/UsageCostCard.vue
@@ -239,12 +239,10 @@ function formatTooltip(params: unknown) {
 <template>
   <BaseCard
     as="article"
-    :padded="false"
     title="成本效率"
     description="预估费用、Token 与缓存收益"
     header-collapse-at="none"
-    header-class="px-5 pt-4"
-    body-class="px-5 pt-3 pb-4"
+    body-class="mt-3"
     class="h-full min-h-90"
   >
     <template #actions>
diff --git a/frontend/src/views/usage/components/UsageDiagnosticCard.vue b/frontend/src/views/usage/components/UsageDiagnosticCard.vue
index 80e978be9..7db8f9652 100644
--- a/frontend/src/views/usage/components/UsageDiagnosticCard.vue
+++ b/frontend/src/views/usage/components/UsageDiagnosticCard.vue
@@ -114,12 +114,10 @@ function diagnosticNameDisplay(name: string) {
 <template>
   <BaseCard
     as="article"
-    :padded="false"
     title="热点诊断"
     :description="`按${selectedDimensionLabel}定位错误、慢请求与费用热点`"
     header-collapse-at="lg"
-    header-class="px-5 pt-4"
-    body-class="min-h-0 min-w-0 px-5 pt-3"
+    body-class="mt-3 min-h-0 min-w-0"
     class="grid h-105 min-h-105 max-h-105 min-w-0 w-full grid-rows-[auto_minmax(0,1fr)] lg:h-90 lg:min-h-90 lg:max-h-90"
   >
     <template #actions>
diff --git a/frontend/src/views/usage/components/UsageHealthCard.vue b/frontend/src/views/usage/components/UsageHealthCard.vue
index 2a256fa24..92490926c 100644
--- a/frontend/src/views/usage/components/UsageHealthCard.vue
+++ b/frontend/src/views/usage/components/UsageHealthCard.vue
@@ -146,11 +146,9 @@ function formatTooltip(params: unknown) {
 <template>
   <BaseCard
     as="article"
-    :padded="false"
     title="请求健康"
     :description="`按${granularityText}观察请求量、成功率与失败时段`"
-    header-class="px-5 pt-4"
-    body-class="px-5 pt-3 pb-4"
+    body-class="mt-3"
     class="h-full min-h-90"
   >
     <template #body>
diff --git a/frontend/src/views/usage/components/UsagePerformanceCard.vue b/frontend/src/views/usage/components/UsagePerformanceCard.vue
index a8d738f1a..5b2886875 100644
--- a/frontend/src/views/usage/components/UsagePerformanceCard.vue
+++ b/frontend/src/views/usage/components/UsagePerformanceCard.vue
@@ -167,12 +167,10 @@ function formatTooltip(params: unknown) {
 <template>
   <BaseCard
     as="article"
-    :padded="false"
     title="响应速度"
     description="总耗时或首字的分位耗时，越低越快"
     header-collapse-at="none"
-    header-class="px-5 pt-4"
-    body-class="px-5 pt-3 pb-4"
+    body-class="mt-3"
     class="h-full min-h-90"
   >
     <template #actions>
diff --git a/frontend/src/views/usage/components/UsageSummaryCards.vue b/frontend/src/views/usage/components/UsageSummaryCards.vue
index c8c2ba41d..063c46fab 100644
--- a/frontend/src/views/usage/components/UsageSummaryCards.vue
+++ b/frontend/src/views/usage/components/UsageSummaryCards.vue
@@ -3,6 +3,7 @@ import type { getUsageRecordSummary } from '@/api'
 import { Activity, Database, FileText, Timer } from '@lucide/vue'
 
 import { computed } from 'vue'
+import BaseCard from '@/components/base/BaseCard.vue'
 import BaseMotionIcon from '@/components/base/BaseMotionIcon.vue'
 
 const props = defineProps<{
@@ -54,10 +55,12 @@ const items = computed(() => [
     class="mt-5 grid shrink-0 grid-cols-1 gap-3 md:grid-cols-2 xl:grid-cols-4"
     aria-label="使用概览"
   >
-    <article
+    <BaseCard
       v-for="item in items"
       :key="item.key"
-      class="grid min-h-23 grid-cols-[36px_minmax(0,1fr)] items-stretch gap-3 rounded-(--cp-card-radius) bg-(--cp-bg-surface) px-4 py-3 shadow-(--cp-shadow-card)"
+      as="article"
+      padding="compact"
+      class="grid min-h-23 grid-cols-[36px_minmax(0,1fr)] items-stretch gap-3"
     >
       <BaseMotionIcon
         aria-hidden="true"
@@ -79,6 +82,6 @@ const items = computed(() => [
           {{ item.detail }}
         </span>
       </div>
-    </article>
+    </BaseCard>
   </section>
 </template>
diff --git a/frontend/src/views/usage/constants.ts b/frontend/src/views/usage/constants.ts
index 3d05d5e9c..b4a3dcfd9 100644
--- a/frontend/src/views/usage/constants.ts
+++ b/frontend/src/views/usage/constants.ts
@@ -5,6 +5,7 @@ export const usageRecordColumns = [
     key: 'accountEmail',
     label: '账号',
     width: '280px',
+    fixed: false as const,
     ellipsis: true,
   },
   {
diff --git a/frontend/src/views/usage/index.vue b/frontend/src/views/usage/index.vue
index 03dd0f985..131baa4bb 100644
--- a/frontend/src/views/usage/index.vue
+++ b/frontend/src/views/usage/index.vue
@@ -79,10 +79,8 @@ watch(timeRange, () => {
     />
 
     <BaseCard
-      :padded="false"
       class="mt-5 flex flex-col"
-      header-class="px-5 pt-4"
-      body-class="flex min-h-0 flex-col px-5 pt-3 pb-4"
+      body-class="mt-3 flex min-h-0 flex-col"
     >
       <template #header>
         <div class="flex flex-wrap items-center justify-between gap-3">