diff --git a/onchain_scout_gate/app/web.py b/onchain_scout_gate/app/web.py
index 46cfd82..50a6cf8 100644
--- a/onchain_scout_gate/app/web.py
+++ b/onchain_scout_gate/app/web.py
@@ -3,6 +3,7 @@ from __future__ import annotations
 import hashlib
 import json
 import logging
+from datetime import datetime, timedelta, timezone
 from pathlib import Path
 
 from apscheduler.schedulers.asyncio import AsyncIOScheduler
@@ -32,6 +33,9 @@ from .storage import Storage
 LOGGER = logging.getLogger("onchain_scout.web")
 FIXED_BAR = "5m"
 DAILY_REPORT_JOB_ID = "daily_report_job"
+FUNNEL_DISPLAY_HOURS_DEFAULT = 24.0
+FUNNEL_DISPLAY_HOURS_MIN = 1.0
+FUNNEL_DISPLAY_HOURS_MAX = 168.0
 
 
 def _hash_password(plain: str) -> str:
@@ -49,6 +53,35 @@ def _asset_version(root: Path) -> str:
     return str(mt or 1)
 
 
+def _parse_alert_created_at_utc(raw: object) -> datetime | None:
+    if raw is None:
+        return None
+    try:
+        s = str(raw).strip()
+        if not s:
+            return None
+        if s.endswith("Z"):
+            s = s[:-1] + "+00:00"
+        dt = datetime.fromisoformat(s)
+        if dt.tzinfo is not None:
+            return dt.astimezone(timezone.utc).replace(tzinfo=None)
+        return dt
+    except (TypeError, ValueError):
+        return None
+
+
+def _filter_alerts_within_hours(alerts: list[dict], *, within_hours: float) -> list[dict]:
+    if within_hours <= 0:
+        return list(alerts)
+    cutoff = datetime.utcnow() - timedelta(hours=within_hours)
+    out: list[dict] = []
+    for a in alerts:
+        created = _parse_alert_created_at_utc(a.get("created_at"))
+        if created is not None and created >= cutoff:
+            out.append(a)
+    return out
+
+
 def _dedupe_funnel_alerts_by_symbol(alerts: list[dict]) -> list[dict]:
     """同一币种只保留一条漏斗记录：优先保留 created_at 最新的（避免历史轮次堆叠）。"""
     by_time = sorted(alerts, key=lambda x: str(x.get("created_at") or ""), reverse=True)
@@ -513,15 +546,23 @@ def create_app(settings: Settings) -> FastAPI:
         )
 
     @app.get("/api/funnel")
-    async def api_funnel(_: None = Depends(require_login)) -> JSONResponse:
+    async def api_funnel(
+        window_hours: float = FUNNEL_DISPLAY_HOURS_DEFAULT,
+        _: None = Depends(require_login),
+    ) -> JSONResponse:
+        wh = max(
+            FUNNEL_DISPLAY_HOURS_MIN,
+            min(FUNNEL_DISPLAY_HOURS_MAX, float(window_hours)),
+        )
         alerts = await storage.get_recent_alerts(limit=500)
         items = [a for a in alerts if (a.get("details") or {}).get("source") == "gemma_funnel"]
+        items = _filter_alerts_within_hours(items, within_hours=wh)
         items = _dedupe_funnel_alerts_by_symbol(items)
         items.sort(
             key=lambda x: float((x.get("details") or {}).get("composite_score") or 0.0),
             reverse=True,
         )
-        return JSONResponse({"items": items[:100]})
+        return JSONResponse({"items": items[:100], "window_hours": wh})
 
     @app.get("/api/daily-report")
     async def api_daily_report(_: None = Depends(require_login)) -> JSONResponse:
diff --git a/onchain_scout_gate/static/app.js b/onchain_scout_gate/static/app.js
index 1da3b78..ebaacaa 100644
--- a/onchain_scout_gate/static/app.js
+++ b/onchain_scout_gate/static/app.js
@@ -77,6 +77,53 @@ function formatIsoToBeijing(iso) {
   return s.replace("T", " ");
 }
 
+const FUNNEL_WINDOW_LS_KEY = "funnel_display_hours";
+const FUNNEL_WINDOW_DEFAULT = 24;
+const FUNNEL_WINDOW_MIN = 1;
+const FUNNEL_WINDOW_MAX = 168;
+
+function getFunnelWindowHours() {
+  try {
+    const n = Number(localStorage.getItem(FUNNEL_WINDOW_LS_KEY));
+    if (Number.isFinite(n) && n >= FUNNEL_WINDOW_MIN && n <= FUNNEL_WINDOW_MAX) {
+      return Math.round(n);
+    }
+  } catch (_) {
+    /* ignore */
+  }
+  return FUNNEL_WINDOW_DEFAULT;
+}
+
+function setFunnelWindowHours(raw) {
+  const n = Math.round(Number(raw));
+  const h =
+    Number.isFinite(n) && n >= FUNNEL_WINDOW_MIN && n <= FUNNEL_WINDOW_MAX
+      ? n
+      : FUNNEL_WINDOW_DEFAULT;
+  try {
+    localStorage.setItem(FUNNEL_WINDOW_LS_KEY, String(h));
+  } catch (_) {
+    /* ignore */
+  }
+  const inp = document.getElementById("funnelWindowHoursInput");
+  if (inp) inp.value = String(h);
+  return h;
+}
+
+function initFunnelWindowControls() {
+  const inp = document.getElementById("funnelWindowHoursInput");
+  if (inp) inp.value = String(getFunnelWindowHours());
+  const btn = document.getElementById("applyFunnelWindowBtn");
+  if (btn) {
+    btn.addEventListener("click", () => {
+      const h = setFunnelWindowHours(getInputNumber("funnelWindowHoursInput"));
+      const msg = document.getElementById("funnelWindowMsg");
+      if (msg) msg.textContent = `// 展示窗口已设为最近 ${h} 小时（本浏览器记忆）`;
+      refresh().catch(console.error);
+    });
+  }
+}
+
 function tickClock() {
   const el = document.getElementById("liveClock");
   if (!el) return;
@@ -132,8 +179,9 @@ function renderFunnel(items, funnelCtx) {
   if (!items.length) {
     const empty = document.createElement("div");
     empty.className = "matrix-hint matrix-hint-empty";
+    const winH = Number(ctx.windowHours) || FUNNEL_WINDOW_DEFAULT;
     let why =
-      "// 暂无漏斗记录：本面板只展示 <code>source=gemma_funnel</code> 的排序结果（需配置开启且 Ollama 跑完一轮后写入告警表）。";
+      `// 暂无漏斗记录：本面板只展示最近 <code>${winH}h</code> 内 <code>source=gemma_funnel</code> 的排序结果（需配置开启且 Ollama 跑完一轮后写入告警表）。`;
     if (!gemmaOn) {
       why += " 当前 <code>gemma.enabled=false</code>，漏斗未运行。";
     } else if (cycleMsg === "funnel_pending") {
@@ -162,8 +210,10 @@ function renderFunnel(items, funnelCtx) {
     const card = document.createElement("article");
     card.className = "matrix-card" + (pushed ? " hot" : "");
     const vol = (d.programmatic && d.programmatic.est_quote_vol_24h_usdt) || "—";
+    const updatedCn = formatIsoToBeijing(a.created_at);
     card.innerHTML = `
-      <div class="matrix-card-title">${a.symbol}</div>
+      <div class="matrix-card-title">${escapeHtml(a.symbol || "—")}</div>
+      <div class="matrix-card-meta time">更新 ${escapeHtml(updatedCn)}（北京时间）</div>
       <div class="matrix-card-meta">
         COMPOSITE <strong>${comp.toFixed(1)}</strong> · P${g.priority || "?"} ·
         结构 ${g.daily_structure || "?"} · 量 ${g.volume_view || "?"} ·
@@ -324,12 +374,13 @@ async function saveDailyReportSettings() {
 
 async function refresh() {
   try {
+    const funnelWindowH = getFunnelWindowHours();
     const [status, alerts, logs, config, funnel, dailyReport] = await Promise.all([
       fetchJson("/api/status"),
       fetchJson("/api/alerts"),
       fetchJson("/api/logs"),
       fetchJson("/api/config"),
-      fetchJson("/api/funnel"),
+      fetchJson(`/api/funnel?window_hours=${encodeURIComponent(funnelWindowH)}`),
       fetchJson("/api/daily-report"),
     ]);
     updateHud(status);
@@ -340,10 +391,13 @@ async function refresh() {
     if (cf) cf.textContent = pretty(config);
 
     const runState = (status && status.state) || {};
+    const funnelWindowApplied =
+      funnel && funnel.window_hours != null ? Number(funnel.window_hours) : funnelWindowH;
     renderFunnel(funnel.items || [], {
       gemmaEnabled: !!(config.gemma && config.gemma.enabled),
       cycleMsg: runState.gemma_cycle_msg || "",
       lastFunnelAt: runState.last_funnel_at || "",
+      windowHours: funnelWindowApplied,
     });
     renderDailyReport(dailyReport);
     try {
@@ -370,12 +424,12 @@ async function refresh() {
     if (fm) {
       let line =
         `// 浏览器刚拉完 API：${pullCn} ｜ HUD 的 LAST：上一轮 Gate 扫描整轮结束（可与本行差约 ${poll}s）｜ ` +
-        `矩阵卡片 ${fc} 条：来自告警库「每币最新一条」｜ 记忆体 last_funnel 更新：${lfAt} ｜ 后轮 gemma：${gmsg}`;
+        `矩阵卡片 ${fc} 条：最近 ${funnelWindowApplied}h 内 gemma_funnel（每币最新一条）｜ 记忆体 last_funnel 更新：${lfAt} ｜ 后轮 gemma：${gmsg}`;
       if (String(gmsg).includes("funnel_ranked=0") && fc > 0) {
         line +=
-          " ｜ 说明：本轮后台漏斗未写入新排名（常见：4h 内同一币已跑过 FUNNEL-GEMMA 被跳过、或候选在取日线/Ollama 前被滤掉），卡片仍是历史结果，不是前端卡死。";
+          ` ｜ 说明：本轮后台漏斗未写入新排名（常见：4h 内同一币已跑过 FUNNEL-GEMMA 被跳过），仍显示 ${funnelWindowApplied}h 内已有卡片。`;
       } else {
-        line += " ｜ 若文案长期不变=近期没有新的 gemma_funnel 入库。";
+        line += ` ｜ 超过 ${funnelWindowApplied}h 的漏斗记录不再显示（库内仍在）。`;
       }
       fm.textContent = line;
     }
@@ -613,6 +667,7 @@ loadOrderExecutors().catch(console.error);
 tickClock();
 setInterval(tickClock, 1000);
 initMatrixRain();
+initFunnelWindowControls();
 refresh();
 setInterval(refresh, 4000);
 document.addEventListener("visibilitychange", () => {
diff --git a/onchain_scout_gate/templates/dashboard.html b/onchain_scout_gate/templates/dashboard.html
index 2c9a6fc..65b938f 100644
--- a/onchain_scout_gate/templates/dashboard.html
+++ b/onchain_scout_gate/templates/dashboard.html
@@ -94,6 +94,12 @@
                     <span class="matrix-chip matrix-chip-magenta">LIVE FEED</span>
                 </div>
                 <p class="matrix-hint">合成评分 · 成交量 · 日线结构 · 上方空间 · 中间阻力 → 达标企业微信推送</p>
+                <div class="matrix-form-row matrix-form-row-tight">
+                    <label for="funnelWindowHoursInput">展示窗口(h)</label>
+                    <input id="funnelWindowHoursInput" type="number" step="1" min="1" max="168" value="24" title="仅显示该小时内写入的 gemma_funnel，保存在本浏览器" />
+                    <button type="button" id="applyFunnelWindowBtn" class="matrix-btn">应用</button>
+                    <span id="funnelWindowMsg" class="matrix-msg"></span>
+                </div>
                 <p id="funnelMeta" class="matrix-hint matrix-dim">// 数据同步中…</p>
                 <div id="funnelMatrix" class="matrix-grid"></div>
             </section>
diff --git a/onchain_scout_gate/tests/test_funnel_window.py b/onchain_scout_gate/tests/test_funnel_window.py
new file mode 100644
index 0000000..b61d40f
--- /dev/null
+++ b/onchain_scout_gate/tests/test_funnel_window.py
@@ -0,0 +1,13 @@
+from datetime import datetime, timedelta
+
+from app.web import _filter_alerts_within_hours
+
+
+def test_filter_alerts_within_hours_keeps_recent() -> None:
+    now = datetime.utcnow()
+    alerts = [
+        {"symbol": "BTC", "created_at": (now - timedelta(hours=1)).isoformat()},
+        {"symbol": "ETH", "created_at": (now - timedelta(hours=30)).isoformat()},
+    ]
+    out = _filter_alerts_within_hours(alerts, within_hours=24.0)
+    assert [a["symbol"] for a in out] == ["BTC"]