diff --git a/app.py b/app.py
index cd1e5af..5a5106f 100644
--- a/app.py
+++ b/app.py
@@ -1667,14 +1667,18 @@ def api_dashboard_live():
     from dashboard_lib import build_dashboard_payload
 
     _dashboard_sync_tick["n"] += 1
-    sync_trades = _dashboard_sync_tick["n"] % 5 == 0
-    payload = build_dashboard_payload(
-        get_db=get_db,
-        get_setting=get_setting,
-        fetch_price=fetch_price,
-        sync_ctp_trades=sync_trades,
-    )
-    return jsonify(payload)
+    sync_trades = _dashboard_sync_tick["n"] % 15 == 0
+    try:
+        payload = build_dashboard_payload(
+            get_db=get_db,
+            get_setting=get_setting,
+            fetch_price=fetch_price,
+            sync_ctp_trades=sync_trades,
+        )
+        return jsonify(payload)
+    except Exception as exc:
+        app.logger.exception("dashboard live: %s", exc)
+        return jsonify({"ok": False, "error": "看板数据暂时不可用"}), 503
 
 
 @app.route("/market")
diff --git a/dashboard_lib.py b/dashboard_lib.py
index 99e3071..2c2178d 100644
--- a/dashboard_lib.py
+++ b/dashboard_lib.py
@@ -10,6 +10,25 @@ from typing import Any, Callable, Optional
 from zoneinfo import ZoneInfo
 
 _TZ = ZoneInfo("Asia/Shanghai")
+_PRICE_CACHE: dict[str, tuple[float, float]] = {}
+_PRICE_CACHE_TTL = 2.0
+
+
+def _cached_fetch_price(
+    fetch_price: Callable[[str, str, str], Optional[float]],
+    sym: str,
+    market: str,
+    sina: str,
+) -> Optional[float]:
+    key = sym or ""
+    now = datetime.now().timestamp()
+    hit = _PRICE_CACHE.get(key)
+    if hit and (now - hit[1]) < _PRICE_CACHE_TTL:
+        return hit[0]
+    price = fetch_price(sym, market, sina)
+    if price is not None:
+        _PRICE_CACHE[key] = (float(price), now)
+    return price
 
 
 def _direction_label(direction: str) -> str:
@@ -174,7 +193,7 @@ def build_dashboard_payload(
             sina = r["sina_code"] or ""
             upper = float(r["upper"] or 0)
             lower = float(r["lower"] or 0)
-            price = fetch_price(sym, market, sina)
+            price = _cached_fetch_price(fetch_price, sym, market, sina)
             dist_upper = dist_lower = None
             if price is not None:
                 dist_upper = round(upper - float(price), 2)
diff --git a/static/css/dashboard.css b/static/css/dashboard.css
index df6186a..4cff042 100644
--- a/static/css/dashboard.css
+++ b/static/css/dashboard.css
@@ -362,7 +362,8 @@ html:is([data-layout="phone"], .layout-phone) .dash-mobile-list {
 }
 
 html:is([data-layout="phone"], .layout-phone) .dash-pos-table-wrap,
-html:is([data-layout="phone"], .layout-phone) .dash-keys-table-wrap {
+html:is([data-layout="phone"], .layout-phone) .dash-keys-table-wrap,
+html:is([data-layout="phone"], .layout-phone) .dash-closes-table-wrap {
     display: none;
 }
 
@@ -416,6 +417,27 @@ html:is([data-layout="phone"], .layout-phone) .dash-keys-table-wrap {
     font-size: 0.78rem;
 }
 
+.dash-mobile-item-summary {
+    flex: 1;
+    min-width: 0;
+    line-height: 1.45;
+    color: var(--text-muted);
+}
+
+.dash-mobile-item-summary .pnl-pos {
+    color: var(--profit);
+    font-weight: 600;
+}
+
+.dash-mobile-item-summary .pnl-neg {
+    color: var(--loss);
+    font-weight: 600;
+}
+
+.dash-mobile-item-title .badge {
+    vertical-align: middle;
+}
+
 .dash-mobile-chevron {
     font-size: 0.72rem;
     color: var(--accent);
diff --git a/static/js/dashboard.js b/static/js/dashboard.js
index 00a7420..469a755 100644
--- a/static/js/dashboard.js
+++ b/static/js/dashboard.js
@@ -20,17 +20,21 @@
     var riskBodyEl = document.getElementById('dash-risk-body');
     var posMobileList = document.getElementById('dash-pos-mobile-list');
     var keysMobileList = document.getElementById('dash-keys-mobile-list');
+    var closesMobileList = document.getElementById('dash-closes-mobile-list');
     var detailModal = document.getElementById('dash-detail-modal');
     var detailTitleEl = document.getElementById('dash-detail-title');
     var detailGridEl = document.getElementById('dash-detail-grid');
     var detailCloseBtn = document.getElementById('dash-detail-close');
 
     var pollTimer = null;
+    var pollInFlight = false;
+    var pollFailStreak = 0;
     var positionSource = null;
     var posRowCache = {};
     var posRenderSig = '';
     var posMobileCache = {};
     var keysMobileCache = {};
+    var closesMobileCache = {};
     var lastPosRows = [];
     var lastKeyRows = [];
     var lastKeyIds = '';
@@ -181,6 +185,77 @@
         return '—';
     }
 
+    function fmtMobileLots(v) {
+        var n = Number(v);
+        if (isNaN(n)) return '—';
+        if (Math.abs(n - Math.round(n)) < 0.001) return Math.round(n) + '手';
+        return fmtNum(n) + '手';
+    }
+
+    function fmtMobilePrice(v) {
+        if (v == null || v === '') return '—';
+        var n = Number(v);
+        if (isNaN(n)) return '—';
+        if (Math.abs(n - Math.round(n)) < 0.001) return String(Math.round(n));
+        return fmtNum(n);
+    }
+
+    function fmtMobilePnlNum(v) {
+        if (v == null || v === '') return '—';
+        var n = Number(v);
+        if (isNaN(n)) return '—';
+        var abs = Math.abs(n);
+        var s = Math.abs(abs - Math.round(abs)) < 0.01 ? String(Math.round(abs)) : fmtNum(abs);
+        if (n > 0) return s;
+        if (n < 0) return '-' + s;
+        return '0';
+    }
+
+    function mobilePnlSpanHtml(v) {
+        return '<span class="' + pnlClass(v) + '">' + escHtml(fmtMobilePnlNum(v)) + '</span>';
+    }
+
+    function mobileSummaryHtml(lots, priceLabel, price, pnl) {
+        return fmtMobileLots(lots) + ' ' + priceLabel + ' ' + fmtMobilePrice(price) +
+            ' 盈亏 ' + mobilePnlSpanHtml(pnl);
+    }
+
+    function mobileSymbolTitleHtml(row) {
+        var name = row.symbol_name || row.symbol || '';
+        var code = row.symbol_code || '';
+        if (!code && row.symbol && String(row.symbol).toLowerCase() !== String(name).toLowerCase()) {
+            code = row.symbol;
+        }
+        var exchange = row.symbol_exchange || '';
+        var mainBadge = row.symbol_is_main
+            ? ' <span class="badge planned dash-main-badge">主力</span>' : '';
+        var titleInner = escHtml(name);
+        if (exchange) {
+            titleInner += ' <span class="dash-symbol-ex text-muted">' + escHtml(exchange) + '</span>';
+        }
+        titleInner += mainBadge;
+        titleInner += breakevenBadgeHtml(row);
+        if (code && String(name).toLowerCase() !== String(code).toLowerCase()) {
+            titleInner += ' <span class="text-accent">' + escHtml(code) + '</span> ' + directionBadgeHtml(row);
+        } else if (!name && code) {
+            titleInner = (exchange
+                ? '<span class="dash-symbol-ex text-muted">' + escHtml(exchange) + '</span> '
+                : '') + '<span class="text-accent">' + escHtml(code) + '</span> ' + directionBadgeHtml(row);
+        } else {
+            titleInner += ' ' + directionBadgeHtml(row);
+        }
+        return titleInner;
+    }
+
+    function mobileItemFootHtml(summaryHtml) {
+        return (
+            '<div class="dash-mobile-item-foot">' +
+            '<span class="dash-mobile-item-summary">' + summaryHtml + '</span>' +
+            '<span class="dash-mobile-chevron">查看详情 ›</span>' +
+            '</div>'
+        );
+    }
+
     function symbolCellHtml(row) {
         var name = row.symbol_name || row.symbol || '';
         var code = row.symbol_code || '';
@@ -440,12 +515,40 @@
         });
     }
 
+    function renderClosesMobile(closes) {
+        if (!closesMobileList) return;
+        if (!closes || !closes.length) {
+            closesMobileList.innerHTML = '<div class="dash-mobile-empty">暂无平仓记录</div>';
+            closesMobileCache = {};
+            return;
+        }
+        closesMobileCache = {};
+        closesMobileList.innerHTML = closes.map(function (c) {
+            var net = c.pnl_net != null ? c.pnl_net : c.pnl;
+            closesMobileCache[String(c.id)] = c;
+            var summary = mobileSummaryHtml(c.lots, '平仓', c.close_price, net);
+            return (
+                '<button type="button" class="dash-mobile-item" data-close-id="' + c.id + '">' +
+                '<div class="dash-mobile-item-head">' +
+                '<div class="dash-mobile-item-title">' + mobileSymbolTitleHtml(c) + '</div>' +
+                '</div>' +
+                mobileItemFootHtml(summary) +
+                '</button>'
+            );
+        }).join('');
+    }
+
     function renderCloses(closes) {
         if (!closesBody) return;
         if (!closes || !closes.length) {
             closesBody.innerHTML = '<tr><td colspan="8" class="text-muted">暂无平仓记录</td></tr>';
+            if (isPhoneLayout() && closesMobileList) {
+                closesMobileList.innerHTML = '<div class="dash-mobile-empty">暂无平仓记录</div>';
+            }
+            closesMobileCache = {};
             return;
         }
+        if (isPhoneLayout()) renderClosesMobile(closes);
         closesBody.innerHTML = closes.map(function (c) {
             var pc = pnlClass(c.pnl_net != null ? c.pnl_net : c.pnl);
             return (
@@ -489,6 +592,10 @@
         if (!closes || !closes.length) {
             closesBody.innerHTML = '<tr><td colspan="8" class="text-muted">暂无平仓记录</td></tr>';
             lastCloseHeadId = null;
+            if (isPhoneLayout() && closesMobileList) {
+                closesMobileList.innerHTML = '<div class="dash-mobile-empty">暂无平仓记录</div>';
+            }
+            closesMobileCache = {};
             return;
         }
         var headId = closes[0].id;
@@ -531,6 +638,22 @@
         ];
     }
 
+    function closeDetailItems(c) {
+        var net = c.pnl_net != null ? c.pnl_net : c.pnl;
+        return [
+            { label: '品种', value: (c.symbol_name || c.symbol || '') + (c.symbol_code ? ' ' + c.symbol_code : '') },
+            { label: '方向', html: directionBadgeHtml(c) },
+            { label: '手数', value: String(c.lots) },
+            { label: '开仓价', value: fmtNum(c.entry_price) },
+            { label: '平仓价', value: fmtNum(c.close_price) },
+            { label: '盈亏', html: '<span class="' + pnlClass(c.pnl) + '">' + fmtPnl(c.pnl) + '</span>' },
+            { label: '净盈亏', html: '<span class="' + pnlClass(net) + '">' + fmtPnl(net) + '</span>' },
+            { label: '手续费', value: c.fee != null ? fmtMoney(c.fee) : '—' },
+            { label: '平仓时间', value: c.close_time || '—' },
+            { label: '结果', value: c.result || '—' },
+        ];
+    }
+
     function renderPositionsMobile(rows) {
         if (!posMobileList) return;
         if (!rows.length) {
@@ -542,19 +665,16 @@
         posMobileList.innerHTML = rows.map(function (r) {
             var key = r.key || r.position_key || ((r.symbol_code || '') + ':' + (r.direction || ''));
             posMobileCache[key] = r;
-            var title = symbolCellHtml(r) + ' ' + directionBadgeHtml(r);
-            var meta = fmtNum(r.lots) + ' 手 · 现价 ' +
-                (r.current_price != null ? fmtNum(r.current_price) : '—');
+            var summary = mobileSummaryHtml(
+                r.lots, '现价', r.current_price, r.float_pnl
+            );
             return (
                 '<button type="button" class="dash-mobile-item" data-pos-key="' + escHtml(key) + '">' +
                 '<div class="dash-mobile-item-head">' +
-                '<div class="dash-mobile-item-title">' + title + '</div>' +
+                '<div class="dash-mobile-item-title">' + mobileSymbolTitleHtml(r) + '</div>' +
                 '</div>' +
-                '<div class="dash-mobile-item-meta">' + escHtml(meta) + '</div>' +
-                '<div class="dash-mobile-item-foot">' +
-                '<span class="' + pnlClass(r.float_pnl) + '">' + fmtPnl(r.float_pnl) + '</span>' +
-                '<span class="dash-mobile-chevron">查看详情 ›</span>' +
-                '</div></button>'
+                mobileItemFootHtml(summary) +
+                '</button>'
             );
         }).join('');
     }
@@ -566,15 +686,11 @@
             posMobileCache[key] = r;
             var btn = posMobileList.querySelector('[data-pos-key="' + key + '"]');
             if (!btn) return;
-            var metaEl = btn.querySelector('.dash-mobile-item-meta');
-            var pnlEl = btn.querySelector('.dash-mobile-item-foot span:first-child');
-            if (metaEl) {
-                metaEl.textContent = fmtNum(r.lots) + ' 手 · 现价 ' +
-                    (r.current_price != null ? fmtNum(r.current_price) : '—');
-            }
-            if (pnlEl) {
-                pnlEl.textContent = fmtPnl(r.float_pnl);
-                pnlEl.className = pnlClass(r.float_pnl);
+            var summaryEl = btn.querySelector('.dash-mobile-item-summary');
+            if (summaryEl) {
+                summaryEl.innerHTML = mobileSummaryHtml(
+                    r.lots, '现价', r.current_price, r.float_pnl
+                );
             }
         });
     }
@@ -646,6 +762,15 @@
                 openDetailModal(k.symbol_name || k.symbol || '关键位', keyDetailItems(k));
             });
         }
+        if (closesMobileList) {
+            closesMobileList.addEventListener('click', function (ev) {
+                var btn = ev.target.closest('[data-close-id]');
+                if (!btn) return;
+                var c = closesMobileCache[btn.getAttribute('data-close-id')];
+                if (!c) return;
+                openDetailModal(c.symbol_name || c.symbol || '平仓记录', closeDetailItems(c));
+            });
+        }
     }
 
     function renderPositions(rows) {
@@ -760,21 +885,40 @@
         }
     }
 
+    function pollIntervalMs() {
+        if (isPhoneLayout() || isTabletLayout()) return 3000;
+        return 2000;
+    }
+
     function pollDashboard() {
+        if (pollInFlight) return;
+        pollInFlight = true;
         fetch('/api/dashboard/live')
             .then(function (r) {
                 if (!r.ok) throw new Error('HTTP ' + r.status);
                 return r.json();
             })
             .then(function (data) {
-                if (!data.ok) return;
+                pollFailStreak = 0;
+                if (!data.ok) {
+                    if (updatedEl) updatedEl.textContent = data.error || '看板数据暂不可用';
+                    return;
+                }
                 applyAccount(data);
                 applyRisk(data.risk, data.account);
                 applyKeys(data.keys || []);
                 applyCloses(data.closes || []);
             })
             .catch(function () {
-                if (updatedEl) updatedEl.textContent = '看板数据加载失败';
+                pollFailStreak += 1;
+                if (updatedEl) {
+                    updatedEl.textContent = pollFailStreak >= 3
+                        ? '看板连接失败，正在重试…'
+                        : '看板数据加载失败';
+                }
+            })
+            .finally(function () {
+                pollInFlight = false;
             });
     }
 
@@ -800,14 +944,15 @@
                 positionSource.close();
                 positionSource = null;
             }
-            setTimeout(connectPositionStream, 3000);
+            var delay = (isPhoneLayout() || isTabletLayout()) ? 8000 : 3000;
+            setTimeout(connectPositionStream, delay);
         };
     }
 
     function startPolling() {
         if (pollTimer) clearInterval(pollTimer);
         pollDashboard();
-        pollTimer = setInterval(pollDashboard, 1000);
+        pollTimer = setInterval(pollDashboard, pollIntervalMs());
     }
 
     function stopPolling() {
diff --git a/static/sw.js b/static/sw.js
index 892a171..bb7ec8c 100644
--- a/static/sw.js
+++ b/static/sw.js
@@ -2,7 +2,7 @@
  * 专有软件 — 未经授权禁止复制、传播、转售。
  * 详见 LICENSE.zh-CN.txt
  */
-var CACHE_VERSION = 'qihuo-v9';
+var CACHE_VERSION = 'qihuo-v10';
 var STATIC_CACHE = CACHE_VERSION + '-static';
 var STATIC_ASSETS = [
     '/static/css/base.css',
diff --git a/templates/dashboard.html b/templates/dashboard.html
index 3efc761..ea27a66 100644
--- a/templates/dashboard.html
+++ b/templates/dashboard.html
@@ -99,7 +99,8 @@
 
     <div class="card dashboard-section">
         <h2>平仓记录</h2>
-        <div class="card-scroll">
+        <div class="dash-mobile-list" id="dash-closes-mobile-list"></div>
+        <div class="card-scroll dash-closes-table-wrap">
             <table class="dashboard-table" id="dash-closes-table">
                 <thead>
                     <tr>