diff --git a/game/rock/index.html b/game/rock/index.html
index 8bba9cc..8a7f204 100644
--- a/game/rock/index.html
+++ b/game/rock/index.html
@@ -3007,10 +3007,84 @@
                     return resultFor(selfGesture, opponentGesture);
                 }
 
+                function numberFromFields(source, fields) {
+                    if (!source) return null;
+                    for (var i = 0; i < fields.length; i += 1) {
+                        if (
+                            !Object.prototype.hasOwnProperty.call(
+                                source,
+                                fields[i]
+                            )
+                        ) {
+                            continue;
+                        }
+                        var raw = source[fields[i]];
+                        if (raw === null || raw === undefined || raw === '') {
+                            continue;
+                        }
+                        var value = Number(raw);
+                        if (Number.isFinite(value)) return value;
+                    }
+                    return null;
+                }
+
+                function totalFeeBPSForMatch(match) {
+                    var config = state.config || {};
+                    var feeBPS = numberFromFields(match, [
+                        'fee_bps',
+                        'feeBps',
+                    ]);
+                    var poolBPS = numberFromFields(match, [
+                        'pool_bps',
+                        'poolBps',
+                    ]);
+                    if (feeBPS === null) {
+                        feeBPS = numberFromFields(config, [
+                            'fee_bps',
+                            'feeBps',
+                        ]);
+                    }
+                    if (poolBPS === null) {
+                        poolBPS = numberFromFields(config, [
+                            'pool_bps',
+                            'poolBps',
+                        ]);
+                    }
+                    if (feeBPS === null && poolBPS === null) return null;
+                    return Math.max(
+                        0,
+                        Math.min(10000, (feeBPS || 0) + (poolBPS || 0))
+                    );
+                }
+
+                function estimatedPayoutFromFee(match) {
+                    var stakeCoin =
+                        numberFromFields(match, ['stake_coin', 'stakeCoin']) ||
+                        state.selectedStake ||
+                        0;
+                    var totalFeeBPS = totalFeeBPSForMatch(match);
+                    if (!stakeCoin || totalFeeBPS === null) return 0;
+                    return Math.max(
+                        0,
+                        Math.trunc(
+                            (stakeCoin * 2 * (10000 - totalFeeBPS)) / 10000
+                        )
+                    );
+                }
+
                 function payoutFromMatch(match, result) {
                     var self = findSelfParticipant(match);
-                    if (self && self.payout_coin > 0) return self.payout_coin;
-                    if (result === 'draw') return 0;
+                    var payoutCoin = numberFromFields(self, [
+                        'payout_coin',
+                        'payoutCoin',
+                    ]);
+                    if (payoutCoin !== null) {
+                        return Math.max(0, Math.trunc(payoutCoin));
+                    }
+                    if (result !== 'win') return 0;
+                    // 真实局缺少 payout_coin 时不能再展示未扣点的 2 倍押注。
+                    // 兜底只能按本局或配置里的 fee_bps + pool_bps 估算。
+                    if (match) return estimatedPayoutFromFee(match);
                     return state.selectedStake * 2;
                 }