diff --git a/lib/instance/instance_embed_context_lib.py b/lib/instance/instance_embed_context_lib.py
index 3103f02..fdcac17 100644
--- a/lib/instance/instance_embed_context_lib.py
+++ b/lib/instance/instance_embed_context_lib.py
@@ -121,7 +121,8 @@ def _fmt_coin_amount(v: float | None, *, min_amt: float = 1e-6) -> str | None:
         return None
     try:
         n = float(v)
-    except (TypeError, ValueError):
+    except Exception:
+        # Jinja Undefined 等也吞掉,避免顶栏 float(Undefined) → HTTP 500
         return None
     if n < min_amt:
         return None
diff --git a/lib/instance/templates/instance_header_panel.html b/lib/instance/templates/instance_header_panel.html
index 9118bcb..3bb9979 100644
--- a/lib/instance/templates/instance_header_panel.html
+++ b/lib/instance/templates/instance_header_panel.html
@@ -43,7 +43,7 @@
         {% set _trading_margin_mode = 'coin' if _coin_margin else 'usdc' %}
         <span class="inst-phone-chip"{% if not _show_perp %} style="display:none"{% endif %} data-perp-funds="1">
             <em>交易</em>
-            <b data-funds-field="current-capital">{{ trading_account_label(current_capital, options_trading_eth, options_trading_btc, margin_mode=_trading_margin_mode) }}</b>
+            <b data-funds-field="current-capital">{{ trading_account_label(current_capital, options_trading_eth|default(none), options_trading_btc|default(none), margin_mode=_trading_margin_mode) }}</b>
         </span>
         <span class="inst-phone-chip"{% if not _show_perp %} style="display:none"{% endif %} data-perp-funds="1">
             <em>资金</em>
diff --git a/lib/instance/templates/instance_header_stats.html b/lib/instance/templates/instance_header_stats.html
index 7549899..e120d23 100644
--- a/lib/instance/templates/instance_header_stats.html
+++ b/lib/instance/templates/instance_header_stats.html
@@ -34,16 +34,16 @@
     </div>
     <div class="stat-strip-item"{% if not _show_perp %} style="display:none"{% endif %} data-perp-funds="1">
         <div class="label">交易账户</div>
-        <div class="value" id="current-capital" data-funds-field="current-capital">{{ trading_account_label(current_capital, options_trading_eth, options_trading_btc, margin_mode=_trading_margin_mode) }}</div>
+        <div class="value" id="current-capital" data-funds-field="current-capital">{{ trading_account_label(current_capital, options_trading_eth|default(none), options_trading_btc|default(none), margin_mode=_trading_margin_mode) }}</div>
     </div>
     {% if options_enabled and not _coin_margin %}
     <div class="stat-strip-item" data-options-funds="1">
         <div class="label">期权资金账户</div>
-        <div class="value" id="options-funding-usdc" data-funds-field="options-funding-usdc">{{ options_funding_label(options_funding_usdc, options_funding_usdt, options_funding_eth, options_margin_mode, options_underly|default('ETH')) }}</div>
+        <div class="value" id="options-funding-usdc" data-funds-field="options-funding-usdc">{{ options_funding_label(options_funding_usdc|default(none), options_funding_usdt|default(none), options_funding_eth|default(none), options_margin_mode|default(none), options_underly|default('ETH')) }}</div>
     </div>
     <div class="stat-strip-item" data-options-funds="1">
         <div class="label">期权交易账户</div>
-        <div class="value" id="options-trading-usdc" data-funds-field="options-trading-usdc">{{ options_funding_label(options_trading_usdc, options_trading_usdt, options_trading_eth, options_margin_mode, options_underly|default('ETH')) }}</div>
+        <div class="value" id="options-trading-usdc" data-funds-field="options-trading-usdc">{{ options_funding_label(options_trading_usdc|default(none), options_trading_usdt|default(none), options_trading_eth|default(none), options_margin_mode|default(none), options_underly|default('ETH')) }}</div>
     </div>
     {% endif %}
     <div class="stat-strip-item stat-strip-item--pnl">