diff --git a/frontend/src/views/admin/AccountsView.vue b/frontend/src/views/admin/AccountsView.vue
index 567ffb52..2c389d5c 100644
--- a/frontend/src/views/admin/AccountsView.vue
+++ b/frontend/src/views/admin/AccountsView.vue
@@ -280,8 +280,7 @@
               <!-- 主要操作：编辑和删除（始终显示） -->
               <button
                 @click="handleEdit(row)"
-                class="rounded-lg p-2 text-gray-500 transition-colors hover:bg-gray-100 hover:text-primary-600 dark:hover:bg-dark-700 dark:hover:text-primary-400"
-                :title="t('common.edit')"
+                class="flex flex-col items-center gap-0.5 rounded-lg p-1.5 text-gray-500 transition-colors hover:bg-gray-100 hover:text-primary-600 dark:hover:bg-dark-700 dark:hover:text-primary-400"
               >
                 <svg
                   class="h-4 w-4"
@@ -296,11 +295,11 @@
                     d="M16.862 4.487l1.687-1.688a1.875 1.875 0 112.652 2.652L10.582 16.07a4.5 4.5 0 01-1.897 1.13L6 18l.8-2.685a4.5 4.5 0 011.13-1.897l8.932-8.931zm0 0L19.5 7.125M18 14v4.75A2.25 2.25 0 0115.75 21H5.25A2.25 2.25 0 013 18.75V8.25A2.25 2.25 0 015.25 6H10"
                   />
                 </svg>
+                <span class="text-xs">{{ t('common.edit') }}</span>
               </button>
               <button
                 @click="handleDelete(row)"
-                class="rounded-lg p-2 text-gray-500 transition-colors hover:bg-red-50 hover:text-red-600 dark:hover:bg-red-900/20 dark:hover:text-red-400"
-                :title="t('common.delete')"
+                class="flex flex-col items-center gap-0.5 rounded-lg p-1.5 text-gray-500 transition-colors hover:bg-red-50 hover:text-red-600 dark:hover:bg-red-900/20 dark:hover:text-red-400"
               >
                 <svg
                   class="h-4 w-4"
@@ -315,6 +314,7 @@
                     d="M14.74 9l-.346 9m-4.788 0L9.26 9m9.968-3.21c.342.052.682.107 1.022.166m-1.022-.165L18.16 19.673a2.25 2.25 0 01-2.244 2.077H8.084a2.25 2.25 0 01-2.244-2.077L4.772 5.79m14.456 0a48.108 48.108 0 00-3.478-.397m-12 .562c.34-.059.68-.114 1.022-.165m0 0a48.11 48.11 0 013.478-.397m7.5 0v-.916c0-1.18-.91-2.164-2.09-2.201a51.964 51.964 0 00-3.32 0c-1.18.037-2.09 1.022-2.09 2.201v.916m7.5 0a48.667 48.667 0 00-7.5 0"
                   />
                 </svg>
+                <span class="text-xs">{{ t('common.delete') }}</span>
               </button>
 
               <!-- 次要操作：展开时显示 -->
@@ -323,8 +323,7 @@
                 <button
                   v-if="row.status === 'error'"
                   @click="handleResetStatus(row)"
-                  class="rounded-lg p-2 text-red-500 transition-colors hover:bg-red-50 hover:text-red-600 dark:hover:bg-red-900/20 dark:hover:text-red-400"
-                  :title="t('admin.accounts.resetStatus')"
+                  class="flex flex-col items-center gap-0.5 rounded-lg p-1.5 text-red-500 transition-colors hover:bg-red-50 hover:text-red-600 dark:hover:bg-red-900/20 dark:hover:text-red-400"
                 >
                 <svg
                   class="h-4 w-4"
@@ -339,13 +338,13 @@
                     d="M9 15L3 9m0 0l6-6M3 9h12a6 6 0 010 12h-3"
                   />
                 </svg>
+                <span class="text-xs">{{ t('admin.accounts.resetStatus') }}</span>
                 </button>
                 <!-- Clear Rate Limit button -->
                 <button
                   v-if="isRateLimited(row) || isOverloaded(row)"
                   @click="handleClearRateLimit(row)"
-                  class="rounded-lg p-2 text-amber-500 transition-colors hover:bg-amber-50 hover:text-amber-600 dark:hover:bg-amber-900/20 dark:hover:text-amber-400"
-                  :title="t('admin.accounts.clearRateLimit')"
+                  class="flex flex-col items-center gap-0.5 rounded-lg p-1.5 text-amber-500 transition-colors hover:bg-amber-50 hover:text-amber-600 dark:hover:bg-amber-900/20 dark:hover:text-amber-400"
                 >
                   <svg
                     class="h-4 w-4"
@@ -360,12 +359,12 @@
                       d="M12 6v6h4.5m4.5 0a9 9 0 11-18 0 9 9 0 0118 0z"
                     />
                   </svg>
+                  <span class="text-xs">{{ t('admin.accounts.clearRateLimit') }}</span>
                 </button>
                 <!-- Test Connection button -->
                 <button
                   @click="handleTest(row)"
-                  class="rounded-lg p-2 text-gray-500 transition-colors hover:bg-green-50 hover:text-green-600 dark:hover:bg-green-900/20 dark:hover:text-green-400"
-                  :title="t('admin.accounts.testConnection')"
+                  class="flex flex-col items-center gap-0.5 rounded-lg p-1.5 text-gray-500 transition-colors hover:bg-green-50 hover:text-green-600 dark:hover:bg-green-900/20 dark:hover:text-green-400"
                 >
                   <svg
                     class="h-4 w-4"
@@ -380,12 +379,12 @@
                       d="M5.25 5.653c0-.856.917-1.398 1.667-.986l11.54 6.347a1.125 1.125 0 010 1.972l-11.54 6.347a1.125 1.125 0 01-1.667-.986V5.653z"
                     />
                   </svg>
+                  <span class="text-xs">{{ t('admin.accounts.testConnection') }}</span>
                 </button>
                 <!-- View Stats button -->
                 <button
                   @click="handleViewStats(row)"
-                  class="rounded-lg p-2 text-gray-500 transition-colors hover:bg-indigo-50 hover:text-indigo-600 dark:hover:bg-indigo-900/20 dark:hover:text-indigo-400"
-                  :title="t('admin.accounts.viewStats')"
+                  class="flex flex-col items-center gap-0.5 rounded-lg p-1.5 text-gray-500 transition-colors hover:bg-indigo-50 hover:text-indigo-600 dark:hover:bg-indigo-900/20 dark:hover:text-indigo-400"
                 >
                   <svg
                     class="h-4 w-4"
@@ -400,12 +399,12 @@
                       d="M3 13.125C3 12.504 3.504 12 4.125 12h2.25c.621 0 1.125.504 1.125 1.125v6.75C7.5 20.496 6.996 21 6.375 21h-2.25A1.125 1.125 0 013 19.875v-6.75zM9.75 8.625c0-.621.504-1.125 1.125-1.125h2.25c.621 0 1.125.504 1.125 1.125v11.25c0 .621-.504 1.125-1.125 1.125h-2.25a1.125 1.125 0 01-1.125-1.125V8.625zM16.5 4.125c0-.621.504-1.125 1.125-1.125h2.25C20.496 3 21 3.504 21 4.125v15.75c0 .621-.504 1.125-1.125 1.125h-2.25a1.125 1.125 0 01-1.125-1.125V4.125z"
                     />
                   </svg>
+                  <span class="text-xs">{{ t('admin.accounts.viewStats') }}</span>
                 </button>
                 <button
                   v-if="row.type === 'oauth' || row.type === 'setup-token'"
                   @click="handleReAuth(row)"
-                  class="rounded-lg p-2 text-gray-500 transition-colors hover:bg-blue-50 hover:text-blue-600 dark:hover:bg-blue-900/20 dark:hover:text-blue-400"
-                  :title="t('admin.accounts.reAuthorize')"
+                  class="flex flex-col items-center gap-0.5 rounded-lg p-1.5 text-gray-500 transition-colors hover:bg-blue-50 hover:text-blue-600 dark:hover:bg-blue-900/20 dark:hover:text-blue-400"
                 >
                   <svg
                     class="h-4 w-4"
@@ -420,12 +419,12 @@
                       d="M13.19 8.688a4.5 4.5 0 011.242 7.244l-4.5 4.5a4.5 4.5 0 01-6.364-6.364l1.757-1.757m13.35-.622l1.757-1.757a4.5 4.5 0 00-6.364-6.364l-4.5 4.5a4.5 4.5 0 001.242 7.244"
                     />
                   </svg>
+                  <span class="text-xs">{{ t('admin.accounts.reAuthorize') }}</span>
                 </button>
                 <button
                   v-if="row.type === 'oauth' || row.type === 'setup-token'"
                   @click="handleRefreshToken(row)"
-                  class="rounded-lg p-2 text-gray-500 transition-colors hover:bg-purple-50 hover:text-purple-600 dark:hover:bg-purple-900/20 dark:hover:text-purple-400"
-                  :title="t('admin.accounts.refreshToken')"
+                  class="flex flex-col items-center gap-0.5 rounded-lg p-1.5 text-gray-500 transition-colors hover:bg-purple-50 hover:text-purple-600 dark:hover:bg-purple-900/20 dark:hover:text-purple-400"
                 >
                   <svg
                     class="h-4 w-4"
@@ -440,6 +439,7 @@
                       d="M16.023 9.348h4.992v-.001M2.985 19.644v-4.992m0 0h4.992m-4.993 0l3.181 3.183a8.25 8.25 0 0013.803-3.7M4.031 9.865a8.25 8.25 0 0113.803-3.7l3.181 3.182m0-4.991v4.99"
                     />
                   </svg>
+                  <span class="text-xs">{{ t('admin.accounts.refreshToken') }}</span>
                 </button>
               </template>
             </div>
diff --git a/frontend/src/views/admin/GroupsView.vue b/frontend/src/views/admin/GroupsView.vue
index 75ff9570..a0d34fa3 100644
--- a/frontend/src/views/admin/GroupsView.vue
+++ b/frontend/src/views/admin/GroupsView.vue
@@ -166,8 +166,7 @@
             <div class="flex items-center gap-1">
               <button
                 @click="handleEdit(row)"
-                class="rounded-lg p-2 text-gray-500 transition-colors hover:bg-gray-100 hover:text-primary-600 dark:hover:bg-dark-700 dark:hover:text-primary-400"
-                :title="t('common.edit')"
+                class="flex flex-col items-center gap-0.5 rounded-lg p-1.5 text-gray-500 transition-colors hover:bg-gray-100 hover:text-primary-600 dark:hover:bg-dark-700 dark:hover:text-primary-400"
               >
                 <svg
                   class="h-4 w-4"
@@ -182,11 +181,11 @@
                     d="M16.862 4.487l1.687-1.688a1.875 1.875 0 112.652 2.652L10.582 16.07a4.5 4.5 0 01-1.897 1.13L6 18l.8-2.685a4.5 4.5 0 011.13-1.897l8.932-8.931zm0 0L19.5 7.125M18 14v4.75A2.25 2.25 0 0115.75 21H5.25A2.25 2.25 0 013 18.75V8.25A2.25 2.25 0 015.25 6H10"
                   />
                 </svg>
+                <span class="text-xs">{{ t('common.edit') }}</span>
               </button>
               <button
                 @click="handleDelete(row)"
-                class="rounded-lg p-2 text-gray-500 transition-colors hover:bg-red-50 hover:text-red-600 dark:hover:bg-red-900/20 dark:hover:text-red-400"
-                :title="t('common.delete')"
+                class="flex flex-col items-center gap-0.5 rounded-lg p-1.5 text-gray-500 transition-colors hover:bg-red-50 hover:text-red-600 dark:hover:bg-red-900/20 dark:hover:text-red-400"
               >
                 <svg
                   class="h-4 w-4"
@@ -201,6 +200,7 @@
                     d="M14.74 9l-.346 9m-4.788 0L9.26 9m9.968-3.21c.342.052.682.107 1.022.166m-1.022-.165L18.16 19.673a2.25 2.25 0 01-2.244 2.077H8.084a2.25 2.25 0 01-2.244-2.077L4.772 5.79m14.456 0a48.108 48.108 0 00-3.478-.397m-12 .562c.34-.059.68-.114 1.022-.165m0 0a48.11 48.11 0 013.478-.397m7.5 0v-.916c0-1.18-.91-2.164-2.09-2.201a51.964 51.964 0 00-3.32 0c-1.18.037-2.09 1.022-2.09 2.201v.916m7.5 0a48.667 48.667 0 00-7.5 0"
                   />
                 </svg>
+                <span class="text-xs">{{ t('common.delete') }}</span>
               </button>
             </div>
           </template>
diff --git a/frontend/src/views/admin/ProxiesView.vue b/frontend/src/views/admin/ProxiesView.vue
index 68a58d01..f5d39ef2 100644
--- a/frontend/src/views/admin/ProxiesView.vue
+++ b/frontend/src/views/admin/ProxiesView.vue
@@ -112,8 +112,7 @@
               <button
                 @click="handleTestConnection(row)"
                 :disabled="testingProxyIds.has(row.id)"
-                class="rounded-lg p-2 text-gray-500 transition-colors hover:bg-emerald-50 hover:text-emerald-600 disabled:cursor-not-allowed disabled:opacity-50 dark:hover:bg-emerald-900/20 dark:hover:text-emerald-400"
-                :title="t('admin.proxies.testConnection')"
+                class="flex flex-col items-center gap-0.5 rounded-lg p-1.5 text-gray-500 transition-colors hover:bg-emerald-50 hover:text-emerald-600 disabled:cursor-not-allowed disabled:opacity-50 dark:hover:bg-emerald-900/20 dark:hover:text-emerald-400"
               >
                 <svg
                   v-if="testingProxyIds.has(row.id)"
@@ -149,11 +148,11 @@
                     d="M9 12.75L11.25 15 15 9.75M21 12a9 9 0 11-18 0 9 9 0 0118 0z"
                   />
                 </svg>
+                <span class="text-xs">{{ t('admin.proxies.testConnection') }}</span>
               </button>
               <button
                 @click="handleEdit(row)"
-                class="rounded-lg p-2 text-gray-500 transition-colors hover:bg-gray-100 hover:text-primary-600 dark:hover:bg-dark-700 dark:hover:text-primary-400"
-                :title="t('common.edit')"
+                class="flex flex-col items-center gap-0.5 rounded-lg p-1.5 text-gray-500 transition-colors hover:bg-gray-100 hover:text-primary-600 dark:hover:bg-dark-700 dark:hover:text-primary-400"
               >
                 <svg
                   class="h-4 w-4"
@@ -168,11 +167,11 @@
                     d="M16.862 4.487l1.687-1.688a1.875 1.875 0 112.652 2.652L10.582 16.07a4.5 4.5 0 01-1.897 1.13L6 18l.8-2.685a4.5 4.5 0 011.13-1.897l8.932-8.931zm0 0L19.5 7.125M18 14v4.75A2.25 2.25 0 0115.75 21H5.25A2.25 2.25 0 013 18.75V8.25A2.25 2.25 0 015.25 6H10"
                   />
                 </svg>
+                <span class="text-xs">{{ t('common.edit') }}</span>
               </button>
               <button
                 @click="handleDelete(row)"
-                class="rounded-lg p-2 text-gray-500 transition-colors hover:bg-red-50 hover:text-red-600 dark:hover:bg-red-900/20 dark:hover:text-red-400"
-                :title="t('common.delete')"
+                class="flex flex-col items-center gap-0.5 rounded-lg p-1.5 text-gray-500 transition-colors hover:bg-red-50 hover:text-red-600 dark:hover:bg-red-900/20 dark:hover:text-red-400"
               >
                 <svg
                   class="h-4 w-4"
@@ -187,6 +186,7 @@
                     d="M14.74 9l-.346 9m-4.788 0L9.26 9m9.968-3.21c.342.052.682.107 1.022.166m-1.022-.165L18.16 19.673a2.25 2.25 0 01-2.244 2.077H8.084a2.25 2.25 0 01-2.244-2.077L4.772 5.79m14.456 0a48.108 48.108 0 00-3.478-.397m-12 .562c.34-.059.68-.114 1.022-.165m0 0a48.11 48.11 0 013.478-.397m7.5 0v-.916c0-1.18-.91-2.164-2.09-2.201a51.964 51.964 0 00-3.32 0c-1.18.037-2.09 1.022-2.09 2.201v.916m7.5 0a48.667 48.667 0 00-7.5 0"
                   />
                 </svg>
+                <span class="text-xs">{{ t('common.delete') }}</span>
               </button>
             </div>
           </template>
diff --git a/frontend/src/views/admin/RedeemView.vue b/frontend/src/views/admin/RedeemView.vue
index 37799b3c..9ca0976c 100644
--- a/frontend/src/views/admin/RedeemView.vue
+++ b/frontend/src/views/admin/RedeemView.vue
@@ -161,8 +161,7 @@
               <button
                 v-if="row.status === 'unused'"
                 @click="handleDelete(row)"
-                class="rounded-lg p-2 text-gray-500 transition-colors hover:bg-red-50 hover:text-red-600 dark:hover:bg-red-900/20 dark:hover:text-red-400"
-                :title="t('common.delete')"
+                class="flex flex-col items-center gap-0.5 rounded-lg p-1.5 text-gray-500 transition-colors hover:bg-red-50 hover:text-red-600 dark:hover:bg-red-900/20 dark:hover:text-red-400"
               >
                 <svg class="h-4 w-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                   <path
@@ -172,6 +171,7 @@
                     d="M19 7l-.867 12.142A2 2 0 0116.138 21H7.862a2 2 0 01-1.995-1.858L5 7m5 4v6m4-6v6m1-10V4a1 1 0 00-1-1h-4a1 1 0 00-1 1v3M4 7h16"
                   />
                 </svg>
+                <span class="text-xs">{{ t('common.delete') }}</span>
               </button>
               <span v-else class="text-gray-400 dark:text-dark-500">-</span>
             </div>
diff --git a/frontend/src/views/admin/SubscriptionsView.vue b/frontend/src/views/admin/SubscriptionsView.vue
index 5f58e1a2..9496f0dc 100644
--- a/frontend/src/views/admin/SubscriptionsView.vue
+++ b/frontend/src/views/admin/SubscriptionsView.vue
@@ -257,8 +257,7 @@
               <button
                 v-if="row.status === 'active'"
                 @click="handleExtend(row)"
-                class="rounded-lg p-2 text-gray-500 transition-colors hover:bg-green-50 hover:text-green-600 dark:hover:bg-green-900/20 dark:hover:text-green-400"
-                :title="t('admin.subscriptions.extend')"
+                class="flex flex-col items-center gap-0.5 rounded-lg p-1.5 text-gray-500 transition-colors hover:bg-green-50 hover:text-green-600 dark:hover:bg-green-900/20 dark:hover:text-green-400"
               >
                 <svg
                   class="h-4 w-4"
@@ -273,12 +272,12 @@
                     d="M12 6v6h4.5m4.5 0a9 9 0 11-18 0 9 9 0 0118 0z"
                   />
                 </svg>
+                <span class="text-xs">{{ t('admin.subscriptions.extend') }}</span>
               </button>
               <button
                 v-if="row.status === 'active'"
                 @click="handleRevoke(row)"
-                class="rounded-lg p-2 text-gray-500 transition-colors hover:bg-red-50 hover:text-red-600 dark:hover:bg-red-900/20 dark:hover:text-red-400"
-                :title="t('admin.subscriptions.revoke')"
+                class="flex flex-col items-center gap-0.5 rounded-lg p-1.5 text-gray-500 transition-colors hover:bg-red-50 hover:text-red-600 dark:hover:bg-red-900/20 dark:hover:text-red-400"
               >
                 <svg
                   class="h-4 w-4"
@@ -293,6 +292,7 @@
                     d="M18.364 18.364A9 9 0 005.636 5.636m12.728 12.728A9 9 0 015.636 5.636m12.728 12.728L5.636 5.636"
                   />
                 </svg>
+                <span class="text-xs">{{ t('admin.subscriptions.revoke') }}</span>
               </button>
             </div>
           </template>
diff --git a/frontend/src/views/admin/UsageView.vue b/frontend/src/views/admin/UsageView.vue
index 69de978c..bdd9f68f 100644
--- a/frontend/src/views/admin/UsageView.vue
+++ b/frontend/src/views/admin/UsageView.vue
@@ -455,7 +455,11 @@
                 ${{ row.actual_cost.toFixed(6) }}
               </span>
               <!-- Cost Detail Tooltip -->
-              <div class="group relative">
+              <div
+                class="group relative"
+                @mouseenter="showTooltip($event, row)"
+                @mouseleave="hideTooltip"
+              >
                 <div
                   class="flex h-4 w-4 cursor-help items-center justify-center rounded-full bg-gray-100 transition-colors group-hover:bg-blue-100 dark:bg-gray-700 dark:group-hover:bg-blue-900/50"
                 >
@@ -471,60 +475,6 @@
                     />
                   </svg>
                 </div>
-                <!-- Tooltip Content (right side) -->
-                <div
-                  class="invisible absolute left-full top-1/2 z-[100] ml-2 -translate-y-1/2 opacity-0 transition-all duration-200 group-hover:visible group-hover:opacity-100"
-                >
-                  <div
-                    class="whitespace-nowrap rounded-lg border border-gray-700 bg-gray-900 px-3 py-2.5 text-xs text-white shadow-xl dark:border-gray-600 dark:bg-gray-800"
-                  >
-                    <div class="space-y-1.5">
-                      <!-- Cost Breakdown -->
-                      <div class="mb-2 border-b border-gray-700 pb-1.5">
-                        <div class="text-xs font-semibold text-gray-300 mb-1">成本明细</div>
-                        <div v-if="row.input_cost > 0" class="flex items-center justify-between gap-4">
-                          <span class="text-gray-400">{{ t('admin.usage.inputCost') }}</span>
-                          <span class="font-medium text-white">${{ row.input_cost.toFixed(6) }}</span>
-                        </div>
-                        <div v-if="row.output_cost > 0" class="flex items-center justify-between gap-4">
-                          <span class="text-gray-400">{{ t('admin.usage.outputCost') }}</span>
-                          <span class="font-medium text-white">${{ row.output_cost.toFixed(6) }}</span>
-                        </div>
-                        <div v-if="row.cache_creation_cost > 0" class="flex items-center justify-between gap-4">
-                          <span class="text-gray-400">{{ t('admin.usage.cacheCreationCost') }}</span>
-                          <span class="font-medium text-white">${{ row.cache_creation_cost.toFixed(6) }}</span>
-                        </div>
-                        <div v-if="row.cache_read_cost > 0" class="flex items-center justify-between gap-4">
-                          <span class="text-gray-400">{{ t('admin.usage.cacheReadCost') }}</span>
-                          <span class="font-medium text-white">${{ row.cache_read_cost.toFixed(6) }}</span>
-                        </div>
-                      </div>
-                      <!-- Rate and Summary -->
-                      <div class="flex items-center justify-between gap-6">
-                        <span class="text-gray-400">{{ t('usage.rate') }}</span>
-                        <span class="font-semibold text-blue-400"
-                          >{{ (row.rate_multiplier || 1).toFixed(2) }}x</span
-                        >
-                      </div>
-                      <div class="flex items-center justify-between gap-6">
-                        <span class="text-gray-400">{{ t('usage.original') }}</span>
-                        <span class="font-medium text-white">${{ row.total_cost.toFixed(6) }}</span>
-                      </div>
-                      <div
-                        class="flex items-center justify-between gap-6 border-t border-gray-700 pt-1.5"
-                      >
-                        <span class="text-gray-400">{{ t('usage.billed') }}</span>
-                        <span class="font-semibold text-green-400"
-                          >${{ row.actual_cost.toFixed(6) }}</span
-                        >
-                      </div>
-                    </div>
-                    <!-- Tooltip Arrow (left side) -->
-                    <div
-                      class="absolute right-full top-1/2 h-0 w-0 -translate-y-1/2 border-b-[6px] border-r-[6px] border-t-[6px] border-b-transparent border-r-gray-900 border-t-transparent dark:border-r-gray-800"
-                    ></div>
-                  </div>
-                </div>
               </div>
             </div>
           </template>
@@ -587,6 +537,66 @@
       />
     </div>
   </AppLayout>
+
+  <!-- Tooltip Portal -->
+  <Teleport to="body">
+    <div
+      v-if="tooltipVisible"
+      class="fixed z-[9999] pointer-events-none -translate-y-1/2"
+      :style="{
+        left: tooltipPosition.x + 'px',
+        top: tooltipPosition.y + 'px'
+      }"
+    >
+      <div
+        class="whitespace-nowrap rounded-lg border border-gray-700 bg-gray-900 px-3 py-2.5 text-xs text-white shadow-xl dark:border-gray-600 dark:bg-gray-800"
+      >
+        <div class="space-y-1.5">
+          <!-- Cost Breakdown -->
+          <div class="mb-2 border-b border-gray-700 pb-1.5">
+            <div class="text-xs font-semibold text-gray-300 mb-1">成本明细</div>
+            <div v-if="tooltipData && tooltipData.input_cost > 0" class="flex items-center justify-between gap-4">
+              <span class="text-gray-400">{{ t('admin.usage.inputCost') }}</span>
+              <span class="font-medium text-white">${{ tooltipData.input_cost.toFixed(6) }}</span>
+            </div>
+            <div v-if="tooltipData && tooltipData.output_cost > 0" class="flex items-center justify-between gap-4">
+              <span class="text-gray-400">{{ t('admin.usage.outputCost') }}</span>
+              <span class="font-medium text-white">${{ tooltipData.output_cost.toFixed(6) }}</span>
+            </div>
+            <div v-if="tooltipData && tooltipData.cache_creation_cost > 0" class="flex items-center justify-between gap-4">
+              <span class="text-gray-400">{{ t('admin.usage.cacheCreationCost') }}</span>
+              <span class="font-medium text-white">${{ tooltipData.cache_creation_cost.toFixed(6) }}</span>
+            </div>
+            <div v-if="tooltipData && tooltipData.cache_read_cost > 0" class="flex items-center justify-between gap-4">
+              <span class="text-gray-400">{{ t('admin.usage.cacheReadCost') }}</span>
+              <span class="font-medium text-white">${{ tooltipData.cache_read_cost.toFixed(6) }}</span>
+            </div>
+          </div>
+          <!-- Rate and Summary -->
+          <div class="flex items-center justify-between gap-6">
+            <span class="text-gray-400">{{ t('usage.rate') }}</span>
+            <span class="font-semibold text-blue-400"
+              >{{ (tooltipData?.rate_multiplier || 1).toFixed(2) }}x</span
+            >
+          </div>
+          <div class="flex items-center justify-between gap-6">
+            <span class="text-gray-400">{{ t('usage.original') }}</span>
+            <span class="font-medium text-white">${{ tooltipData?.total_cost.toFixed(6) }}</span>
+          </div>
+          <div class="flex items-center justify-between gap-6 border-t border-gray-700 pt-1.5">
+            <span class="text-gray-400">{{ t('usage.billed') }}</span>
+            <span class="font-semibold text-green-400"
+              >${{ tooltipData?.actual_cost.toFixed(6) }}</span
+            >
+          </div>
+        </div>
+        <!-- Tooltip Arrow (left side) -->
+        <div
+          class="absolute right-full top-1/2 h-0 w-0 -translate-y-1/2 border-b-[6px] border-r-[6px] border-t-[6px] border-b-transparent border-r-gray-900 border-t-transparent dark:border-r-gray-800"
+        ></div>
+      </div>
+    </div>
+  </Teleport>
 </template>
 
 <script setup lang="ts">
@@ -615,6 +625,11 @@ import type {
 const { t } = useI18n()
 const appStore = useAppStore()
 
+// Tooltip state
+const tooltipVisible = ref(false)
+const tooltipPosition = ref({ x: 0, y: 0 })
+const tooltipData = ref<UsageLog | null>(null)
+
 // Usage stats from API
 const usageStats = ref<AdminUsageStatsResponse | null>(null)
 
@@ -1038,6 +1053,22 @@ const handleClickOutside = (event: MouseEvent) => {
   }
 }
 
+// Tooltip functions
+const showTooltip = (event: MouseEvent, row: UsageLog) => {
+  const target = event.currentTarget as HTMLElement
+  const rect = target.getBoundingClientRect()
+
+  tooltipData.value = row
+  tooltipPosition.value.x = rect.right + 8
+  tooltipPosition.value.y = rect.top + rect.height / 2
+  tooltipVisible.value = true
+}
+
+const hideTooltip = () => {
+  tooltipVisible.value = false
+  tooltipData.value = null
+}
+
 onMounted(() => {
   initializeDateRange()
   loadFilterOptions()
diff --git a/frontend/src/views/admin/UsersView.vue b/frontend/src/views/admin/UsersView.vue
index 7f647d83..821d5b3c 100644
--- a/frontend/src/views/admin/UsersView.vue
+++ b/frontend/src/views/admin/UsersView.vue
@@ -203,8 +203,7 @@
               <!-- 主要操作：编辑和删除（始终显示） -->
               <button
                 @click="handleEdit(row)"
-                class="rounded-lg p-2 text-gray-500 transition-colors hover:bg-gray-100 hover:text-primary-600 dark:hover:bg-dark-700 dark:hover:text-primary-400"
-                :title="t('common.edit')"
+                class="flex flex-col items-center gap-0.5 rounded-lg p-1.5 text-gray-500 transition-colors hover:bg-gray-100 hover:text-primary-600 dark:hover:bg-dark-700 dark:hover:text-primary-400"
               >
                 <svg
                   class="h-4 w-4"
@@ -219,12 +218,12 @@
                     d="M16.862 4.487l1.687-1.688a1.875 1.875 0 112.652 2.652L10.582 16.07a4.5 4.5 0 01-1.897 1.13L6 18l.8-2.685a4.5 4.5 0 011.13-1.897l8.932-8.931zm0 0L19.5 7.125M18 14v4.75A2.25 2.25 0 0115.75 21H5.25A2.25 2.25 0 013 18.75V8.25A2.25 2.25 0 015.25 6H10"
                   />
                 </svg>
+                <span class="text-xs">{{ t('common.edit') }}</span>
               </button>
               <button
                 v-if="row.role !== 'admin'"
                 @click="handleDelete(row)"
-                class="rounded-lg p-2 text-gray-500 transition-colors hover:bg-red-50 hover:text-red-600 dark:hover:bg-red-900/20 dark:hover:text-red-400"
-                :title="t('common.delete')"
+                class="flex flex-col items-center gap-0.5 rounded-lg p-1.5 text-gray-500 transition-colors hover:bg-red-50 hover:text-red-600 dark:hover:bg-red-900/20 dark:hover:text-red-400"
               >
                 <svg
                   class="h-4 w-4"
@@ -239,6 +238,7 @@
                     d="M14.74 9l-.346 9m-4.788 0L9.26 9m9.968-3.21c.342.052.682.107 1.022.166m-1.022-.165L18.16 19.673a2.25 2.25 0 01-2.244 2.077H8.084a2.25 2.25 0 01-2.244-2.077L4.772 5.79m14.456 0a48.108 48.108 0 00-3.478-.397m-12 .562c.34-.059.68-.114 1.022-.165m0 0a48.11 48.11 0 013.478-.397m7.5 0v-.916c0-1.18-.91-2.164-2.09-2.201a51.964 51.964 0 00-3.32 0c-1.18.037-2.09 1.022-2.09 2.201v.916m7.5 0a48.667 48.667 0 00-7.5 0"
                   />
                 </svg>
+                <span class="text-xs">{{ t('common.delete') }}</span>
               </button>
 
               <!-- 次要操作：展开时显示 -->
@@ -248,16 +248,11 @@
                   v-if="row.role !== 'admin'"
                   @click="handleToggleStatus(row)"
                   :class="[
-                    'rounded-lg p-2 transition-colors',
+                    'flex flex-col items-center gap-0.5 rounded-lg p-1.5 transition-colors',
                     row.status === 'active'
                       ? 'text-gray-500 hover:bg-orange-50 hover:text-orange-600 dark:hover:bg-orange-900/20 dark:hover:text-orange-400'
                       : 'text-gray-500 hover:bg-green-50 hover:text-green-600 dark:hover:bg-green-900/20 dark:hover:text-green-400'
                   ]"
-                  :title="
-                    row.status === 'active'
-                      ? t('admin.users.disableUser')
-                      : t('admin.users.enableUser')
-                  "
                 >
                 <svg
                   v-if="row.status === 'active'"
@@ -287,12 +282,12 @@
                     d="M9 12.75L11.25 15 15 9.75M21 12a9 9 0 11-18 0 9 9 0 0118 0z"
                   />
                 </svg>
+                <span class="text-xs">{{ row.status === 'active' ? t('admin.users.disable') : t('admin.users.enable') }}</span>
                 </button>
                 <!-- Allowed Groups -->
                 <button
                   @click="handleAllowedGroups(row)"
-                  class="rounded-lg p-2 text-gray-500 transition-colors hover:bg-blue-50 hover:text-blue-600 dark:hover:bg-blue-900/20 dark:hover:text-blue-400"
-                  :title="t('admin.users.setAllowedGroups')"
+                  class="flex flex-col items-center gap-0.5 rounded-lg p-1.5 text-gray-500 transition-colors hover:bg-blue-50 hover:text-blue-600 dark:hover:bg-blue-900/20 dark:hover:text-blue-400"
                 >
                   <svg
                     class="h-4 w-4"
@@ -307,12 +302,12 @@
                       d="M18 18.72a9.094 9.094 0 003.741-.479 3 3 0 00-4.682-2.72m.94 3.198l.001.031c0 .225-.012.447-.037.666A11.944 11.944 0 0112 21c-2.17 0-4.207-.576-5.963-1.584A6.062 6.062 0 016 18.719m12 0a5.971 5.971 0 00-.941-3.197m0 0A5.995 5.995 0 0012 12.75a5.995 5.995 0 00-5.058 2.772m0 0a3 3 0 00-4.681 2.72 8.986 8.986 0 003.74.477m.94-3.197a5.971 5.971 0 00-.94 3.197M15 6.75a3 3 0 11-6 0 3 3 0 016 0zm6 3a2.25 2.25 0 11-4.5 0 2.25 2.25 0 014.5 0zm-13.5 0a2.25 2.25 0 11-4.5 0 2.25 2.25 0 014.5 0z"
                     />
                   </svg>
+                  <span class="text-xs">{{ t('admin.users.groups') }}</span>
                 </button>
                 <!-- View API Keys -->
                 <button
                   @click="handleViewApiKeys(row)"
-                  class="rounded-lg p-2 text-gray-500 transition-colors hover:bg-purple-50 hover:text-purple-600 dark:hover:bg-purple-900/20 dark:hover:text-purple-400"
-                  :title="t('admin.users.viewApiKeys')"
+                  class="flex flex-col items-center gap-0.5 rounded-lg p-1.5 text-gray-500 transition-colors hover:bg-purple-50 hover:text-purple-600 dark:hover:bg-purple-900/20 dark:hover:text-purple-400"
                 >
                   <svg
                     class="h-4 w-4"
@@ -324,15 +319,15 @@
                     <path
                       stroke-linecap="round"
                       stroke-linejoin="round"
-                      d="M15.75 5.25a3 3 0 013 3m3 0a6 6 0 01-7.029 5.912c-.563-.097-1.159.026-1.563.43L10.5 17.25H8.25v2.25H6v2.25H2.25v-2.818c0-.597.237-1.17.659-1.591l6.499-6.499c.404-.404.527-1 .43-1.563A6 6 0 1221.75 8.25z"
+                      d="M15.75 5.25a3 3 0 013 3m3 0a6 6 0 01-7.029 5.912c-.563-.097-1.159.026-1.563.43L10.5 17.25H8.25v2.25H6v2.25H2.25v-2.818c0-.597.237-1.17.659-1.591l6.499-6.499c.404-.404.527-1 .43-1.563A6 6 0 1121.75 8.25z"
                     />
                   </svg>
+                  <span class="text-xs">{{ t('admin.users.apiKeys') }}</span>
                 </button>
                 <!-- Deposit -->
                 <button
                   @click="handleDeposit(row)"
-                  class="rounded-lg p-2 text-gray-500 transition-colors hover:bg-emerald-50 hover:text-emerald-600 dark:hover:bg-emerald-900/20 dark:hover:text-emerald-400"
-                  :title="t('admin.users.deposit')"
+                  class="flex flex-col items-center gap-0.5 rounded-lg p-1.5 text-gray-500 transition-colors hover:bg-emerald-50 hover:text-emerald-600 dark:hover:bg-emerald-900/20 dark:hover:text-emerald-400"
                 >
                   <svg
                     class="h-4 w-4"
@@ -343,12 +338,12 @@
                   >
                     <path stroke-linecap="round" stroke-linejoin="round" d="M12 4.5v15m7.5-7.5h-15" />
                   </svg>
+                  <span class="text-xs">{{ t('admin.users.deposit') }}</span>
                 </button>
                 <!-- Withdraw -->
                 <button
                   @click="handleWithdraw(row)"
-                  class="rounded-lg p-2 text-gray-500 transition-colors hover:bg-red-50 hover:text-red-600 dark:hover:bg-red-900/20 dark:hover:text-red-400"
-                  :title="t('admin.users.withdraw')"
+                  class="flex flex-col items-center gap-0.5 rounded-lg p-1.5 text-gray-500 transition-colors hover:bg-red-50 hover:text-red-600 dark:hover:bg-red-900/20 dark:hover:text-red-400"
                 >
                   <svg
                     class="h-4 w-4"
@@ -359,6 +354,7 @@
                   >
                     <path stroke-linecap="round" stroke-linejoin="round" d="M5 12h14" />
                   </svg>
+                  <span class="text-xs">{{ t('admin.users.withdraw') }}</span>
                 </button>
               </template>
             </div>