diff --git a/backend/app/sim/matcher.py b/backend/app/sim/matcher.py
index 3650293..e7b2f06 100644
--- a/backend/app/sim/matcher.py
+++ b/backend/app/sim/matcher.py
@@ -507,6 +507,14 @@ class Matcher:
         )
         strike = float(g["strike"]) if g and g["strike"] is not None else None
         expiry_ymd = str(g["expiry_ymd"]) if g and g["expiry_ymd"] else None
+        expiry_ms = None
+        if expiry_ymd and len(expiry_ymd) == 6:
+            try:
+                from ..exchange.okx.parse import expiry_ms_from_ymd
+
+                expiry_ms = expiry_ms_from_ymd(expiry_ymd)
+            except Exception:
+                expiry_ms = None
         perp_inst_id = (
             str(g["perp_inst_id"])
             if g and g["perp_inst_id"]
@@ -532,6 +540,7 @@ class Matcher:
             "option_mark_px": float(opt_mark) if opt_mark is not None else None,
             "strike": strike,
             "expiry_ymd": expiry_ymd,
+            "expiry_ms": expiry_ms,
             "perp_upl": perp_upl,
             "option_upl": option_upl,
             "est_close_fees": est_close_fees,
diff --git a/frontend/src/api/client.ts b/frontend/src/api/client.ts
index 2208680..d97861d 100644
--- a/frontend/src/api/client.ts
+++ b/frontend/src/api/client.ts
@@ -149,6 +149,7 @@ export type PlanState = {
     option_mark_px?: number | null;
     strike?: number | null;
     expiry_ymd?: string | null;
+    expiry_ms?: number | null;
     perp_upl?: number;
     option_upl?: number;
     est_close_fees?: number;
diff --git a/frontend/src/pages/Plan.tsx b/frontend/src/pages/Plan.tsx
index d48eb39..07a114d 100644
--- a/frontend/src/pages/Plan.tsx
+++ b/frontend/src/pages/Plan.tsx
@@ -11,6 +11,28 @@ function pnlClass(n: number | null | undefined) {
   return n > 0 ? "pos-pnl-profit" : "pos-pnl-loss";
 }
 
+/** OKX 期权到期：YYMMDD 当日 08:00 UTC（上海 16:00） */
+function expiryMsFromYmd(ymd: string | null | undefined): number | null {
+  if (!ymd || ymd.length !== 6) return null;
+  const yy = 2000 + Number(ymd.slice(0, 2));
+  const mm = Number(ymd.slice(2, 4));
+  const dd = Number(ymd.slice(4, 6));
+  if (![yy, mm, dd].every((x) => Number.isFinite(x))) return null;
+  return Date.UTC(yy, mm - 1, dd, 8, 0, 0);
+}
+
+function formatCountdown(msLeft: number): string {
+  if (msLeft <= 0) return "已到期";
+  const s = Math.floor(msLeft / 1000);
+  const d = Math.floor(s / 86400);
+  const h = Math.floor((s % 86400) / 3600);
+  const m = Math.floor((s % 3600) / 60);
+  const sec = s % 60;
+  if (d > 0) return `${d}天 ${h}时 ${String(m).padStart(2, "0")}分`;
+  if (h > 0) return `${h}时 ${String(m).padStart(2, "0")}分 ${String(sec).padStart(2, "0")}秒`;
+  return `${m}分 ${String(sec).padStart(2, "0")}秒`;
+}
+
 const PHASE_ZH: Record<string, string> = {
   idle: "空闲",
   wait_signal: "等待信号",
@@ -29,6 +51,7 @@ export default function PlanPage() {
   const [plan, setPlan] = useState<PlanState | null>(null);
   const [err, setErr] = useState("");
   const [busy, setBusy] = useState("");
+  const [nowMs, setNowMs] = useState(() => Date.now());
 
   async function refresh() {
     try {
@@ -50,6 +73,11 @@ export default function PlanPage() {
     return () => window.clearInterval(t);
   }, []);
 
+  useEffect(() => {
+    const t = window.setInterval(() => setNowMs(Date.now()), 1000);
+    return () => window.clearInterval(t);
+  }, []);
+
   async function act(path: string, label: string) {
     setBusy(label);
     setErr("");
@@ -84,6 +112,12 @@ export default function PlanPage() {
       ? `权利金×${fmt(plan?.premium_exit_multiple ?? 1, 2)}`
       : `固定 ${fmt(plan?.net_profit_target ?? 15)} U`;
   const phaseLabel = PHASE_ZH[plan?.phase || ""] || plan?.phase || "—";
+  const expiryMs =
+    pos?.expiry_ms ?? expiryMsFromYmd(pos?.expiry_ymd) ?? null;
+  const countdown =
+    open && expiryMs != null ? formatCountdown(expiryMs - nowMs) : "—";
+  const countdownUrgent =
+    open && expiryMs != null && expiryMs - nowMs > 0 && expiryMs - nowMs < 6 * 3600_000;
 
   return (
     <div>
@@ -290,6 +324,14 @@ export default function PlanPage() {
                   </span>
                 </div>
                 <div className="pos-grid">
+                  <div className="pos-cell pos-cell-wide">
+                    <span className="pos-label">到期倒计时</span>
+                    <span
+                      className={`pos-value mono ${countdownUrgent ? "pos-countdown-urgent" : ""}`}
+                    >
+                      {countdown}
+                    </span>
+                  </div>
                   <div className="pos-cell">
                     <span className="pos-label">开仓均价</span>
                     <span className="pos-value mono">{fmt(pos?.option_entry_px)}</span>
diff --git a/frontend/src/pages/Settings.tsx b/frontend/src/pages/Settings.tsx
index 7ea763a..b744712 100644
--- a/frontend/src/pages/Settings.tsx
+++ b/frontend/src/pages/Settings.tsx
@@ -112,7 +112,7 @@ export default function SettingsPage() {
   }
 
   return (
-    <div style={{ maxWidth: 560 }}>
+    <div className="settings-page">
       <h2 style={{ marginTop: 0 }}>系统设置</h2>
       <div className="tabs">
         <button
@@ -132,207 +132,228 @@ export default function SettingsPage() {
       </div>
 
       {tab === "strategy" ? (
-        <div className="card">
-          <p style={{ color: "var(--muted)", marginTop: 0 }}>
+        <div className="card settings-card">
+          <p className="settings-lead">
             无开仓时间窗；期权按剩余时长选到期 → 平值 → 校验杠杆；出场可选固定金额或权利金倍数。
           </p>
-          {stratOk ? <div style={{ color: "var(--up)", marginBottom: 12 }}>{stratOk}</div> : null}
+          {stratOk ? <div className="settings-ok">{stratOk}</div> : null}
           {err && tab === "strategy" ? <div className="err">{err}</div> : null}
           <form onSubmit={onSaveStrategy}>
-            <h3 style={{ margin: "0 0 10px", fontSize: 14, color: "var(--muted)" }}>资金</h3>
-            <div className="field">
-              <label htmlFor="lev">永续杠杆倍数</label>
-              <input
-                id="lev"
-                className="mono"
-                type="number"
-                step="1"
-                min="1"
-                value={leverage}
-                onChange={(e) => setLeverage(Number(e.target.value))}
-              />
-            </div>
+            <section className="settings-section">
+              <h3>资金</h3>
+              <div className="settings-fields">
+                <div className="field">
+                  <label htmlFor="lev">永续杠杆倍数</label>
+                  <input
+                    id="lev"
+                    className="mono"
+                    type="number"
+                    step="1"
+                    min="1"
+                    value={leverage}
+                    onChange={(e) => setLeverage(Number(e.target.value))}
+                  />
+                </div>
+                <div className="field">
+                  <label htmlFor="perp">永续 ETH 数量</label>
+                  <input
+                    id="perp"
+                    className="mono"
+                    type="number"
+                    step="0.01"
+                    min="0.01"
+                    value={perpQty}
+                    onChange={(e) => setPerpQty(Number(e.target.value))}
+                  />
+                </div>
+                <div className="field">
+                  <label htmlFor="opt">期权 ETH 数量</label>
+                  <input
+                    id="opt"
+                    className="mono"
+                    type="number"
+                    step="0.01"
+                    min="0.01"
+                    value={optQty}
+                    onChange={(e) => setOptQty(Number(e.target.value))}
+                  />
+                </div>
+              </div>
+            </section>
 
-            <h3 style={{ margin: "18px 0 10px", fontSize: 14, color: "var(--muted)" }}>策略</h3>
-            <div className="field">
-              <label htmlFor="hours">期权最小剩余小时</label>
-              <input
-                id="hours"
-                className="mono"
-                type="number"
-                step="1"
-                min="1"
-                value={minHours}
-                onChange={(e) => setMinHours(Number(e.target.value))}
-              />
-            </div>
-            <div className="field">
-              <label htmlFor="olev">期权杠杆下限（现价÷卖一权利金）</label>
-              <input
-                id="olev"
-                className="mono"
-                type="number"
-                step="1"
-                min="1"
-                value={minOptLev}
-                onChange={(e) => setMinOptLev(Number(e.target.value))}
-              />
-            </div>
-            <div className="field">
-              <label htmlFor="exitMode">出场规则</label>
-              <select
-                id="exitMode"
-                className="mono"
-                value={exitMode}
-                onChange={(e) =>
-                  setExitMode(
-                    e.target.value === "premium_multiple"
-                      ? "premium_multiple"
-                      : "fixed_usdt",
-                  )
-                }
-              >
-                <option value="fixed_usdt">固定净盈利（USDT）</option>
-                <option value="premium_multiple">权利金倍数</option>
-              </select>
-            </div>
-            {exitMode === "fixed_usdt" ? (
-              <div className="field">
-                <label htmlFor="netTarget">净盈利出场目标（USDT）</label>
-                <input
-                  id="netTarget"
-                  className="mono"
-                  type="number"
-                  step="0.1"
-                  min="0.1"
-                  value={netTarget}
-                  onChange={(e) => setNetTarget(Number(e.target.value))}
-                />
+            <section className="settings-section">
+              <h3>选约</h3>
+              <div className="settings-fields">
+                <div className="field">
+                  <label htmlFor="hours">期权最小剩余小时</label>
+                  <input
+                    id="hours"
+                    className="mono"
+                    type="number"
+                    step="1"
+                    min="1"
+                    value={minHours}
+                    onChange={(e) => setMinHours(Number(e.target.value))}
+                  />
+                </div>
+                <div className="field">
+                  <label htmlFor="olev">期权杠杆下限（现价÷卖一权利金）</label>
+                  <input
+                    id="olev"
+                    className="mono"
+                    type="number"
+                    step="1"
+                    min="1"
+                    value={minOptLev}
+                    onChange={(e) => setMinOptLev(Number(e.target.value))}
+                  />
+                </div>
               </div>
-            ) : (
-              <div className="field">
-                <label htmlFor="premMult">权利金倍数（1 = 一倍权利金）</label>
-                <input
-                  id="premMult"
-                  className="mono"
-                  type="number"
-                  step="0.1"
-                  min="0.1"
-                  value={premMult}
-                  onChange={(e) => setPremMult(Number(e.target.value))}
-                />
+            </section>
+
+            <section className="settings-section">
+              <h3>出场与风控</h3>
+              <div className="settings-fields">
+                <div className="field">
+                  <label htmlFor="exitMode">出场规则</label>
+                  <select
+                    id="exitMode"
+                    className="mono"
+                    value={exitMode}
+                    onChange={(e) =>
+                      setExitMode(
+                        e.target.value === "premium_multiple"
+                          ? "premium_multiple"
+                          : "fixed_usdt",
+                      )
+                    }
+                  >
+                    <option value="fixed_usdt">固定净盈利（USDT）</option>
+                    <option value="premium_multiple">权利金倍数</option>
+                  </select>
+                </div>
+                {exitMode === "fixed_usdt" ? (
+                  <div className="field">
+                    <label htmlFor="netTarget">净盈利出场目标（USDT）</label>
+                    <input
+                      id="netTarget"
+                      className="mono"
+                      type="number"
+                      step="0.1"
+                      min="0.1"
+                      value={netTarget}
+                      onChange={(e) => setNetTarget(Number(e.target.value))}
+                    />
+                  </div>
+                ) : (
+                  <div className="field">
+                    <label htmlFor="premMult">权利金倍数（1 = 一倍权利金）</label>
+                    <input
+                      id="premMult"
+                      className="mono"
+                      type="number"
+                      step="0.1"
+                      min="0.1"
+                      value={premMult}
+                      onChange={(e) => setPremMult(Number(e.target.value))}
+                    />
+                  </div>
+                )}
+                <div className="field">
+                  <label htmlFor="closeDev">平仓买一/标记最大偏差（%）</label>
+                  <input
+                    id="closeDev"
+                    className="mono"
+                    type="number"
+                    step="1"
+                    min="1"
+                    value={closeDevPct}
+                    onChange={(e) => setCloseDevPct(Number(e.target.value))}
+                  />
+                </div>
+                <div className="field">
+                  <label htmlFor="rest">轮间休息秒数</label>
+                  <input
+                    id="rest"
+                    className="mono"
+                    type="number"
+                    step="1"
+                    value={rest}
+                    onChange={(e) => setRest(Number(e.target.value))}
+                  />
+                </div>
+                <div className="field">
+                  <label htmlFor="fee">手续费率</label>
+                  <input
+                    id="fee"
+                    className="mono"
+                    type="number"
+                    step="0.0001"
+                    value={fee}
+                    onChange={(e) => setFee(Number(e.target.value))}
+                  />
+                </div>
               </div>
-            )}
-            <div className="field">
-              <label htmlFor="closeDev">平仓买一/标记最大偏差（%）</label>
-              <input
-                id="closeDev"
-                className="mono"
-                type="number"
-                step="1"
-                min="1"
-                value={closeDevPct}
-                onChange={(e) => setCloseDevPct(Number(e.target.value))}
-              />
+            </section>
+
+            <div className="settings-actions">
+              <button className="btn" type="submit">
+                保存策略
+              </button>
             </div>
-            <div className="field">
-              <label htmlFor="perp">永续 ETH 数量</label>
-              <input
-                id="perp"
-                className="mono"
-                type="number"
-                step="0.01"
-                min="0.01"
-                value={perpQty}
-                onChange={(e) => setPerpQty(Number(e.target.value))}
-              />
-            </div>
-            <div className="field">
-              <label htmlFor="opt">期权 ETH 数量</label>
-              <input
-                id="opt"
-                className="mono"
-                type="number"
-                step="0.01"
-                min="0.01"
-                value={optQty}
-                onChange={(e) => setOptQty(Number(e.target.value))}
-              />
-            </div>
-            <div className="field">
-              <label htmlFor="rest">轮间休息秒数</label>
-              <input
-                id="rest"
-                className="mono"
-                type="number"
-                step="1"
-                value={rest}
-                onChange={(e) => setRest(Number(e.target.value))}
-              />
-            </div>
-            <div className="field">
-              <label htmlFor="fee">手续费率</label>
-              <input
-                id="fee"
-                className="mono"
-                type="number"
-                step="0.0001"
-                value={fee}
-                onChange={(e) => setFee(Number(e.target.value))}
-              />
-            </div>
-            <button className="btn" type="submit">
-              保存策略
-            </button>
           </form>
         </div>
       ) : (
-        <div className="card">
+        <div className="card settings-card settings-card-narrow">
           {err ? <div className="err">{err}</div> : null}
-          {ok ? <div style={{ color: "var(--up)", marginBottom: 12 }}>{ok}</div> : null}
-          <form onSubmit={onSaveCreds}>
-            <div className="field">
-              <label htmlFor="user">新用户名</label>
-              <input
-                id="user"
-                value={newUsername}
-                onChange={(e) => setNewUsername(e.target.value)}
-                required
-              />
+          {ok ? <div className="settings-ok">{ok}</div> : null}
+          <form onSubmit={onSaveCreds} className="settings-account-form">
+            <div className="settings-fields">
+              <div className="field">
+                <label htmlFor="user">新用户名</label>
+                <input
+                  id="user"
+                  value={newUsername}
+                  onChange={(e) => setNewUsername(e.target.value)}
+                  required
+                />
+              </div>
+              <div className="field">
+                <label htmlFor="cur">当前密码</label>
+                <input
+                  id="cur"
+                  type="password"
+                  value={currentPassword}
+                  onChange={(e) => setCurrentPassword(e.target.value)}
+                  required
+                />
+              </div>
+              <div className="field">
+                <label htmlFor="np">新密码</label>
+                <input
+                  id="np"
+                  type="password"
+                  value={newPassword}
+                  onChange={(e) => setNewPassword(e.target.value)}
+                  required
+                />
+              </div>
+              <div className="field">
+                <label htmlFor="cp">确认新密码</label>
+                <input
+                  id="cp"
+                  type="password"
+                  value={confirmPassword}
+                  onChange={(e) => setConfirmPassword(e.target.value)}
+                  required
+                />
+              </div>
             </div>
-            <div className="field">
-              <label htmlFor="cur">当前密码</label>
-              <input
-                id="cur"
-                type="password"
-                value={currentPassword}
-                onChange={(e) => setCurrentPassword(e.target.value)}
-                required
-              />
+            <div className="settings-actions">
+              <button className="btn" type="submit" disabled={loading}>
+                {loading ? "保存中…" : "保存账号"}
+              </button>
             </div>
-            <div className="field">
-              <label htmlFor="np">新密码</label>
-              <input
-                id="np"
-                type="password"
-                value={newPassword}
-                onChange={(e) => setNewPassword(e.target.value)}
-                required
-              />
-            </div>
-            <div className="field">
-              <label htmlFor="cp">确认新密码</label>
-              <input
-                id="cp"
-                type="password"
-                value={confirmPassword}
-                onChange={(e) => setConfirmPassword(e.target.value)}
-                required
-              />
-            </div>
-            <button className="btn" type="submit" disabled={loading}>
-              {loading ? "保存中…" : "保存账号"}
-            </button>
           </form>
         </div>
       )}
diff --git a/frontend/src/styles/app.css b/frontend/src/styles/app.css
index 500b648..0348b37 100644
--- a/frontend/src/styles/app.css
+++ b/frontend/src/styles/app.css
@@ -145,12 +145,49 @@ input {
 }
 
 .page {
-  padding: 16px;
-  max-width: 1200px;
+  padding: 16px 20px 28px;
+  max-width: min(1680px, 100%);
   margin: 0 auto;
   width: 100%;
 }
 
+@media (min-width: 1800px) {
+  .page {
+    max-width: 1760px;
+    padding-left: 28px;
+    padding-right: 28px;
+  }
+}
+
+@media (max-width: 900px) {
+  .page {
+    padding: 12px 14px 24px;
+  }
+
+  .topnav {
+    grid-template-columns: 1fr;
+    gap: 10px;
+  }
+
+  .topnav-side.left,
+  .topnav-side.right {
+    justify-content: space-between;
+  }
+
+  .topnav-center {
+    justify-content: flex-start;
+    flex-wrap: wrap;
+    gap: 2px;
+    overflow-x: auto;
+    -webkit-overflow-scrolling: touch;
+  }
+
+  .topnav a {
+    padding: 8px 10px;
+    font-size: 13px;
+  }
+}
+
 .card {
   background: var(--bg-panel);
   border: 1px solid var(--line);
@@ -233,6 +270,8 @@ input {
   border-radius: 8px;
   padding: 10px 12px;
   outline: none;
+  width: 100%;
+  min-height: 42px;
 }
 
 .field input:focus,
@@ -240,6 +279,96 @@ input {
   border-color: rgba(240, 185, 11, 0.55);
 }
 
+/* Settings: ultrawide + tablet */
+.settings-page {
+  width: 100%;
+  max-width: 1200px;
+}
+
+.settings-card {
+  width: 100%;
+}
+
+.settings-card-narrow {
+  max-width: 640px;
+}
+
+.settings-lead {
+  color: var(--muted);
+  margin: 0 0 16px;
+  line-height: 1.5;
+  font-size: 13px;
+}
+
+.settings-ok {
+  color: var(--up);
+  margin-bottom: 12px;
+}
+
+.settings-section {
+  margin-bottom: 8px;
+  padding-bottom: 8px;
+  border-bottom: 1px solid var(--line);
+}
+
+.settings-section:last-of-type {
+  border-bottom: 0;
+}
+
+.settings-section h3 {
+  margin: 0 0 12px;
+  font-size: 13px;
+  font-weight: 600;
+  color: var(--muted);
+  letter-spacing: 0.04em;
+  text-transform: none;
+}
+
+.settings-fields {
+  display: grid;
+  grid-template-columns: 1fr;
+  gap: 0 18px;
+}
+
+.settings-fields .field {
+  margin-bottom: 12px;
+}
+
+.settings-actions {
+  margin-top: 8px;
+  display: flex;
+  flex-wrap: wrap;
+  gap: 10px;
+}
+
+@media (min-width: 700px) {
+  .settings-fields {
+    grid-template-columns: repeat(2, minmax(0, 1fr));
+  }
+}
+
+@media (min-width: 1100px) {
+  .settings-page {
+    max-width: 1320px;
+  }
+
+  .settings-fields {
+    grid-template-columns: repeat(3, minmax(0, 1fr));
+  }
+}
+
+@media (max-width: 699px) {
+  .settings-fields .field {
+    margin-bottom: 14px;
+  }
+
+  .field input,
+  .field select {
+    min-height: 44px;
+    font-size: 16px; /* 避免 iOS 自动缩放 */
+  }
+}
+
 .btn {
   border: 0;
   border-radius: 8px;
@@ -385,12 +514,26 @@ input {
   gap: 12px 14px;
 }
 
+.pos-cell-wide {
+  grid-column: 1 / -1;
+}
+
+.pos-countdown-urgent {
+  color: #ffb020 !important;
+}
+
 @media (max-width: 520px) {
   .pos-grid {
     grid-template-columns: repeat(2, 1fr);
   }
 }
 
+@media (min-width: 1400px) {
+  .pos-embed-grid {
+    gap: 14px;
+  }
+}
+
 .pos-cell {
   display: flex;
   flex-direction: column;