diff --git a/lib/queries.ts b/lib/queries.ts
index 4a8ad87..98adfdd 100644
--- a/lib/queries.ts
+++ b/lib/queries.ts
@@ -1,5 +1,22 @@
 import { query } from "./db";
 
+// ── 查询缓存 ─────────────────────────────────────────────────
+const queryCache = new Map<string, { data: unknown; ts: number }>();
+const CACHE_TTL = 120_000; // 2 分钟
+
+function cached<T>(key: string, fn: () => Promise<T>): Promise<T> {
+  const hit = queryCache.get(key);
+  if (hit && Date.now() - hit.ts < CACHE_TTL) return Promise.resolve(hit.data as T);
+  return fn().then((data) => {
+    queryCache.set(key, { data, ts: Date.now() });
+    return data;
+  });
+}
+
+function cacheKey(...parts: unknown[]): string {
+  return parts.map((p) => String(p ?? "")).join(":");
+}
+
 // 真实模型名表达式：优先取 other 里的 upstream_model_name
 const REAL_MODEL = `COALESCE(
   CASE WHEN other IS NOT NULL AND other != '' AND other::jsonb ? 'upstream_model_name'
@@ -61,10 +78,11 @@ export interface OverviewData {
   active_channels: number;
 }
 
-export async function getOverview(
+export function getOverview(
   startTs?: number,
   endTs?: number
 ): Promise<OverviewData> {
+  return cached(cacheKey("overview", startTs, endTs), async () => {
   const params: (string | number | boolean | null)[] = [];
   const where = timeWhere(params, startTs, endTs);
 
@@ -96,6 +114,7 @@ export async function getOverview(
     active_models: Number(r.active_models),
     active_channels: Number(r.active_channels),
   };
+  });
 }
 
 // ── 趋势 ──────────────────────────────────────────────────────
@@ -111,11 +130,12 @@ export interface TrendPoint {
   quota: number;
 }
 
-export async function getTrends(
+export function getTrends(
   granularity: "day" | "week" | "month" = "day",
   startTs?: number,
   endTs?: number
 ): Promise<TrendPoint[]> {
+  return cached(cacheKey("trends", granularity, startTs, endTs), async () => {
   const params: (string | number | boolean | null)[] = [];
   const where = timeWhere(params, startTs, endTs);
 
@@ -148,9 +168,8 @@ export async function getTrends(
     total_tokens: Number(r.prompt_tokens) + Number(r.completion_tokens) + Number(r.cache_creation_tokens) + Number(r.cache_read_tokens),
     quota: Number(r.quota),
   }));
-}
-
-// ── 排名 ──────────────────────────────────────────────────────
+  });
+}// ── 排名 ──────────────────────────────────────────────────────
 
 export interface RankingItem {
   rank: number;
@@ -180,11 +199,12 @@ async function getChannelNames(): Promise<Record<number, string>> {
   return Object.fromEntries(rows.map((r) => [r.id, r.name]));
 }
 
-export async function getUserRanking(
+export function getUserRanking(
   startTs?: number,
   endTs?: number,
   limit = 50
 ): Promise<RankingItem[]> {
+  return cached(cacheKey("userRank", startTs, endTs, limit), async () => {
   const params: (string | number | boolean | null)[] = [];
   const where = timeWhere(params, startTs, endTs);
   params.push(limit);
@@ -220,13 +240,15 @@ export async function getUserRanking(
     quota: Number(r.quota),
     quota_usd: Number(r.quota) / 500000,
   }));
+  });
 }
 
-export async function getModelRanking(
+export function getModelRanking(
   startTs?: number,
   endTs?: number,
   limit = 50
 ): Promise<RankingItem[]> {
+  return cached(cacheKey("modelRank", startTs, endTs, limit), async () => {
   const params: (string | number | boolean | null)[] = [];
   const where = timeWhere(params, startTs, endTs);
   params.push(limit);
@@ -258,13 +280,15 @@ export async function getModelRanking(
     quota: Number(r.quota),
     quota_usd: Number(r.quota) / 500000,
   }));
+  });
 }
 
-export async function getChannelRanking(
+export function getChannelRanking(
   startTs?: number,
   endTs?: number,
   limit = 50
 ): Promise<RankingItem[]> {
+  return cached(cacheKey("channelRank", startTs, endTs, limit), async () => {
   const params: (string | number | boolean | null)[] = [];
   const where = timeWhere(params, startTs, endTs);
   params.push(limit);
@@ -299,6 +323,7 @@ export async function getChannelRanking(
     quota: Number(r.quota),
     quota_usd: Number(r.quota) / 500000,
   }));
+  });
 }
 
 // ── 下钻详情 ──────────────────────────────────────────────────
@@ -310,11 +335,12 @@ export interface DetailBreakdown {
   quota: number;
 }
 
-export async function getUserDetail(
+export function getUserDetail(
   username: string,
   startTs?: number,
   endTs?: number
 ) {
+  return cached(cacheKey("userDetail", username, startTs, endTs), async () => {
   const params: (string | number | boolean | null)[] = [];
   const where = timeWhere(params, startTs, endTs);
   params.push(username);
@@ -374,13 +400,15 @@ export async function getUserDetail(
       quota: Number(m.quota),
     })),
   };
+  });
 }
 
-export async function getModelDetail(
+export function getModelDetail(
   model: string,
   startTs?: number,
   endTs?: number
 ) {
+  return cached(cacheKey("modelDetail", model, startTs, endTs), async () => {
   const params: (string | number | boolean | null)[] = [];
   const where = timeWhere(params, startTs, endTs);
   params.push(model);
@@ -430,13 +458,15 @@ export async function getModelDetail(
       quota: Number(u.quota),
     })),
   };
+  });
 }
 
-export async function getChannelDetail(
+export function getChannelDetail(
   channelId: number,
   startTs?: number,
   endTs?: number
 ) {
+  return cached(cacheKey("channelDetail", channelId, startTs, endTs), async () => {
   const params: (string | number | boolean | null)[] = [];
   const where = timeWhere(params, startTs, endTs);
   params.push(channelId);
@@ -488,6 +518,7 @@ export async function getChannelDetail(
       quota: Number(m.quota),
     })),
   };
+  });
 }
 
 // ── 明细日志 ──────────────────────────────────────────────────
@@ -530,6 +561,8 @@ export async function getLogs(options: {
   channelId?: number;
   tokenName?: string;
 }): Promise<LogsResult> {
+  const ck = cacheKey("logs", options.page, options.pageSize, options.startTs, options.endTs, options.username, options.model, options.channelId, options.tokenName);
+  return cached(ck, async () => {
   const { page = 1, pageSize = 100 } = options;
   const params: (string | number | boolean | null)[] = [];
   let where = timeWhere(params, options.startTs, options.endTs);
@@ -603,4 +636,5 @@ export async function getLogs(options: {
       token_name: r.token_name || "",
     })),
   };
+  });
 }