diff --git a/lib/common/static/hedge_plan.js b/lib/common/static/hedge_plan.js
index 5d824bc..fab077d 100644
--- a/lib/common/static/hedge_plan.js
+++ b/lib/common/static/hedge_plan.js
@@ -287,13 +287,35 @@
   }
 
   function indexPx() {
+    // 期权标的指数(链优先);跨币时勿与永续指数混用
+    return optionIndexPx();
+  }
+
+  function optionIndexPx() {
     const fromChain = state.chain && Number(state.chain.index_px);
     if (fromChain && !Number.isNaN(fromChain) && fromChain > 0) return fromChain;
+    if (!state.crossAsset) {
+      const fromMkt = state.market && Number(state.market.index_px || state.market.mark);
+      if (fromMkt && !Number.isNaN(fromMkt) && fromMkt > 0) return fromMkt;
+    }
+    return null;
+  }
+
+  function perpIndexPx() {
     const fromMkt = state.market && Number(state.market.index_px || state.market.mark);
     if (fromMkt && !Number.isNaN(fromMkt) && fromMkt > 0) return fromMkt;
+    if (!state.crossAsset) return optionIndexPx();
     return null;
   }
 
+  function optionCoin() {
+    return (state.optionUnderly || state.underlying || "ETH").toUpperCase();
+  }
+
+  function perpCoin() {
+    return (state.perpUnderly || state.underlying || "ETH").toUpperCase();
+  }
+
   function currentContracts(expSelectId) {
     const exp = currentExp(expSelectId);
     return (exp && exp.contracts) || [];
@@ -473,37 +495,38 @@
       return null;
     }
     let sheets;
-    let eth;
+    let coinQty;
     if (sheetsOverride != null && Number(sheetsOverride) > 0) {
       sheets = Math.floor(Number(sheetsOverride) + 1e-12);
       if (!(sheets > 0)) return null;
-      eth = Math.round(sheets * ct * 100) / 100;
+      coinQty = Math.round(sheets * ct * 100) / 100;
     } else {
       if (!(budget > 0) || !(a > 0)) return null;
-      eth = Math.floor((usable / a) * 100 + 1e-12) / 100;
-      if (!(eth > 0)) return null;
-      sheets = Math.floor(eth / ct + 1e-12);
+      coinQty = Math.floor((usable / a) * 100 + 1e-12) / 100;
+      if (!(coinQty > 0)) return null;
+      sheets = Math.floor(coinQty / ct + 1e-12);
       if (!(sheets > 0)) return null;
-      eth = Math.round(sheets * ct * 100) / 100;
+      coinQty = Math.round(sheets * ct * 100) / 100;
     }
-    // 跨币:期权币×期权指数×(1/ratio) / 永续指数 = 永续币
-    let perpQty = eth / ratio;
+    const optIdx = Number(optionIndexPx() || 0);
+    const perpIdx = Number(perpIndexPx() || 0);
+    let perpQty = coinQty / ratio;
     let contracts = perpQty / cs;
     let optNotional = null;
     let perpNotional = null;
-    if (state.crossAsset) {
-      const optIdx = Number((state.chain && state.chain.index_px) || 0);
-      const perpIdx = Number((state.market && (state.market.index_px || state.market.mark)) || 0);
-      if (optIdx > 0 && perpIdx > 0) {
-        optNotional = eth * optIdx;
-        perpNotional = optNotional / ratio;
-        perpQty = perpNotional / perpIdx;
-        contracts = perpQty / cs;
-      }
+    // 有双指数时一律走名义U(同币/跨币同公式);跨币缺指数则不定仓
+    if (optIdx > 0 && perpIdx > 0) {
+      optNotional = coinQty * optIdx;
+      perpNotional = optNotional / ratio;
+      perpQty = perpNotional / perpIdx;
+      contracts = perpQty / cs;
+    } else if (state.crossAsset) {
+      return null;
     }
     return {
       usable: usable,
-      eth_qty: eth,
+      eth_qty: coinQty,
+      coin_qty: coinQty,
       perp_qty: perpQty,
       sheets: sheets,
       contracts: contracts,
@@ -511,6 +534,8 @@
       ratio: ratio,
       option_notional_usdt: optNotional,
       perp_notional_usdt: perpNotional,
+      option_index: optIdx > 0 ? optIdx : null,
+      perp_index: perpIdx > 0 ? perpIdx : null,
       cross_asset: !!state.crossAsset,
     };
   }
@@ -542,25 +567,25 @@
 
   function formatOpSizingHtml(sized, amtPrec) {
     if (!sized) return "";
-    const optCoin = (state.optionUnderly || state.underlying || "ETH").toUpperCase();
-    const perpCoin = (state.perpUnderly || state.underlying || "ETH").toUpperCase();
-    const prec = amtPrec != null ? amtPrec : perpCoin === "BTC" ? 4 : 2;
+    const optC = optionCoin();
+    const perpC = perpCoin();
+    const prec = amtPrec != null ? amtPrec : perpC === "BTC" ? 4 : 2;
     let html =
       "期权 <strong>" +
       fmt(sized.eth_qty, 2) +
       "</strong> " +
-      optCoin +
+      optC +
       " / " +
       sized.sheets +
       " 张 → 永续 <strong>" +
       fmt(sized.perp_qty, 4) +
       "</strong> " +
-      perpCoin +
+      perpC +
       " (" +
       fmt(sized.contracts, prec) +
       " 张) · 比例 " +
       fmt(sized.ratio, 2);
-    if (sized.cross_asset && sized.option_notional_usdt != null) {
+    if (sized.option_notional_usdt != null && sized.perp_notional_usdt != null) {
       html +=
         " · 名义U " +
         fmt(sized.option_notional_usdt, 0) +
@@ -580,21 +605,18 @@
 
   /**
    * 期权开仓最大张数:OKX 交易账户 USDT 共用.
-   * 每张开仓需:买币(权利金×1.05×指数) + 永续保证金(对冲名义÷杠杆);
-   * 选最大 N 时须保证扣完买币后剩余仍够永续保证金.
+   * 买币按期权指数折 U;永续保证金按期权名义U÷比例÷杠杆(跨币同口径).
    */
   function computeMaxSheets() {
     const ask = state.selected && Number(state.selected.ask);
     const ct = Number((state.selected && state.selected.ct_mult) || 0.01);
-    const ratio = numInput("hp-opt-perp-ratio", 2);
-    const mark = Number(
-      (state.market && (state.market.mark || state.market.index_px)) || indexPx() || 0
-    );
-    const lev = defaultPerpLeverage(state.underlying);
+    const ratio = numInput("hp-opt-perp-ratio", lockedRatio || 2);
+    const optIdx = Number(optionIndexPx() || 0);
+    const lev = defaultPerpLeverage(perpCoin());
     const tradingUsdt = Number(
       state.tradingUsdt != null ? state.tradingUsdt : state.tradingUsdc
     );
-    if (!(ask > 0) || !(ct > 0) || !(ratio > 0) || !(mark > 0) || !(lev > 0)) {
+    if (!(ask > 0) || !(ct > 0) || !(ratio > 0) || !(optIdx > 0) || !(lev > 0)) {
       return null;
     }
     if (!(tradingUsdt > 0)) {
@@ -607,10 +629,10 @@
         total_per_sheet: 0,
       };
     }
-    // 买币 USDT/张 = 权利金币 × 1.05 × 指数
-    const buyUsdtPerSheet = ask * ct * 1.05 * mark;
-    // 永续名义/张 = (期权币/比例)×指数; 保证金 = 名义÷杠杆
-    const perpNotionalPerSheet = (ct / ratio) * mark;
+    // 买币 USDT/张 = 权利金币 × 1.05 × 期权指数
+    const buyUsdtPerSheet = ask * ct * 1.05 * optIdx;
+    // 永续名义U/张 = 期权币名义U / 比例
+    const perpNotionalPerSheet = (ct * optIdx) / ratio;
     const marginPerSheet = perpNotionalPerSheet / lev;
     const totalPerSheet = buyUsdtPerSheet + marginPerSheet;
     if (!(totalPerSheet > 0)) return null;
@@ -630,11 +652,11 @@
     const perpEl = $("hp-po-perp-auto");
     const maxInfo = computeMaxSheets();
     const sized = currentOpSizing();
-    const coin = (state.underlying || "ETH").toUpperCase();
-    const lev = defaultPerpLeverage(state.underlying);
-    const mark = Number(
-      (state.market && (state.market.mark || state.market.index_px)) || indexPx() || 0
-    );
+    const optC = optionCoin();
+    const perpC = perpCoin();
+    const lev = defaultPerpLeverage(perpC);
+    const optIdx = Number(optionIndexPx() || 0);
+    const perpIdx = Number(perpIndexPx() || 0);
     if (maxEl) {
       if (maxInfo) {
         maxEl.innerHTML =
@@ -648,17 +670,22 @@
           fmt(maxInfo.margin_per_sheet, 2) +
           " (杠杆 " +
           lev +
-          "x)";
+          "x · " +
+          perpC +
+          ")";
       } else {
         maxEl.textContent =
           "选择期权并刷新后显示:期权开仓最大张数(扣买币后剩余须够永续保证金)";
       }
     }
     if (perpEl) {
-      if (sized) {
-        const buyUsdt = sized.premium_est * 1.05 * (mark > 0 ? mark : 0);
-        const marginUsdt =
-          sized.perp_qty * (mark > 0 ? mark : 0) / (lev > 0 ? lev : 1);
+      if (sized && optIdx > 0) {
+        const buyUsdt = sized.premium_est * 1.05 * optIdx;
+        const perpNotional =
+          sized.perp_notional_usdt != null
+            ? Number(sized.perp_notional_usdt)
+            : sized.perp_qty * (perpIdx > 0 ? perpIdx : optIdx);
+        const marginUsdt = perpNotional / (lev > 0 ? lev : 1);
         const remain =
           Number(state.tradingUsdt != null ? state.tradingUsdt : state.tradingUsdc) -
           buyUsdt;
@@ -667,16 +694,20 @@
           "永续自动开 <strong>" +
           fmt(sized.perp_qty, 4) +
           "</strong> " +
-          coin +
+          perpC +
           " / <strong>" +
-          fmt(sized.contracts, coin === "BTC" ? 4 : 2) +
-          "</strong> 张 · 买币约 " +
+          fmt(sized.contracts, perpC === "BTC" ? 4 : 2) +
+          "</strong> 张 · 买" +
+          optC +
+          "约 " +
           fmt(sized.premium_est * 1.05, 4) +
           " " +
-          coin +
+          optC +
           "(≈" +
           fmt(buyUsdt, 2) +
-          " U含5%) · 扣后剩 " +
+          " U含5%·参考" +
+          fmt(optIdx, 2) +
+          ") · 扣后剩 " +
           fmt(remain, 2) +
           " U · 永续保证金约 " +
           fmt(marginUsdt, 2) +
@@ -729,13 +760,21 @@
       b.setAttribute("aria-pressed", on ? "true" : "false");
     });
     const lab = $("hp-perp-uly-label");
-    if (lab) lab.textContent = uly;
+    if (lab) {
+      if (state.mode === "perp_options" && state.crossAsset) {
+        lab.textContent = optionCoin() + "期权/" + perpCoin() + "永续";
+      } else if (state.mode === "perp_options") {
+        lab.textContent = optionCoin();
+      } else {
+        lab.textContent = uly;
+      }
+    }
     const ooLab = $("hp-oo-uly-label");
     if (ooLab) ooLab.textContent = uly;
     // 永续开仓杠杆跟随 env(BTC_LEVERAGE / ALT_LEVERAGE=ETH)
     const levEl = $("hp-perp-leverage");
     if (levEl && !state.perpLevTouched) {
-      levEl.value = String(defaultPerpLeverage(uly));
+      levEl.value = String(defaultPerpLeverage(perpCoin()));
     }
   }
 
@@ -2317,19 +2356,18 @@
     const ct = Number(state.selected.ct_mult || 0.01);
     const ask = Number(state.selected.ask || 0);
     const prem = ask * sheets * ct;
-    // U 以买币参考价(指数)为准,与开仓买币口径一致
-    const buyPx = Number(
-      (state.market && (state.market.index_px || state.market.mark)) || indexPx() || 0
-    );
+    // U 以期权标的指数为准(买 BTC/ETH 开期权);跨币不可用永续 ETH 价
+    const buyPx = Number(optionIndexPx() || 0);
     const premU = buyPx > 0 ? prem * buyPx : null;
     line.textContent =
       "权利金 ≈ " +
       fmt(prem, 4) +
-      " 币" +
+      " " +
+      optionCoin() +
       (premU != null ? " / " + fmt(premU, 2) + " U" : "") +
       " · 卖一 " +
       fmt(ask, 4) +
-      (buyPx > 0 ? " · 买币参考 " + fmt(buyPx, 2) : "");
+      (buyPx > 0 ? " · 买" + optionCoin() + "参考 " + fmt(buyPx, 2) : "");
   }
 
   function buildStraddleRows(contracts) {
diff --git a/lib/hedge_plan/templates/hedge_plan_panel.html b/lib/hedge_plan/templates/hedge_plan_panel.html
index 82e862b..06e2edd 100644
--- a/lib/hedge_plan/templates/hedge_plan_panel.html
+++ b/lib/hedge_plan/templates/hedge_plan_panel.html
@@ -508,4 +508,4 @@
     </div>
   </div>
 </div>
-<script src="/static/hedge_plan.js?v=64"></script>
+<script src="/static/hedge_plan.js?v=65"></script>