diff --git a/server/routes/api.js b/server/routes/api.js
index c71fa8f..af9d20b 100644
--- a/server/routes/api.js
+++ b/server/routes/api.js
@@ -792,7 +792,7 @@ router.post('/ic-cards/:id/sync', async (req, res) => {
     const syncTypeRaw = String(body.type || body.event_type || body.last_event || 'sync').trim().toLowerCase();
     const syncType = syncTypeRaw === 'refill' ? 'topup' : (syncTypeRaw || 'sync');
     const action = String(body.action || body.last_action || '').trim().toLowerCase();
-    const device = String(body.device || body.source || 'device').trim() || 'device';
+    const device = String(body.machine_id || body.machineId || body.device || body.source || 'device').trim() || 'device';
     const station_code = resolveCurrentStationCode(body, resolveStation);
     const entry_station = resolveStation(body.entry_station || body.start_station || current.entry_station || '');
     const exit_station = resolveStation(body.exit_station || current.exit_station || '');
@@ -859,7 +859,7 @@ router.post('/cards/open', async (req, res) => {
     const body = req.body || {};
     const now = Date.now();
     const voucher_code = normalizeOrderCode(body.voucher_code || body.order_code || body.code);
-    const device = String(body.device || 'ticket_machine').trim() || 'ticket_machine';
+    const device = String(body.machine_id || body.machineId || body.device || 'ticket_machine').trim() || 'ticket_machine';
     const station_code = String(body.station_code || '').trim();
     const holder_name = String(body.holder_name || '').trim();
     const note = String(body.note || '').trim();
@@ -1004,7 +1004,7 @@ router.post('/cards/check', async (req, res) => {
     const body = req.body || {};
     const card_id = normalizeIcCardId(body.card_id);
     const action = String(body.action || '').trim().toLowerCase();
-    const device = String(body.device || 'gate').trim() || 'gate';
+    const device = String(body.machine_id || body.machineId || body.device || 'gate').trim() || 'gate';
     const ts = toFiniteNumberOrUndef(body.ts) ?? Date.now();
     if (!card_id || !action) return res.status(400).json({ ok: false, error: 'card_id and action required' });
     if (action !== 'entry' && action !== 'exit') return res.status(400).json({ ok: false, error: 'action must be entry/exit' });
@@ -1240,7 +1240,7 @@ router.post('/tickets/check', async (req, res) => {
   const body = req.body || {};
   const ticket_id = normalizeTicketId(body.ticket_id);
   const action = String(body.action || '').trim().toLowerCase();
-  const device = String(body.device || 'gate');
+  const device = String(body.machine_id || body.machineId || body.device || 'gate');
   const tsIn = Number(body.ts);
   const ts = Number.isFinite(tsIn) ? tsIn : Date.now();
   const hintTripsTotal = body.trips_total;
@@ -1378,7 +1378,7 @@ router.post('/tickets/check', async (req, res) => {
   if (!entered) return deny('not_entered');
   if (exited) return deny('already_exited');
 
-  const newTripsRemaining = Math.max(0, (Number(tripsRemainEffective) || 0) - 1);
+  const newTripsRemaining = isSingleTicket ? 0 : Math.max(0, (Number(tripsRemainEffective) || 0) - 1);
   const shouldSetUsed = isSingleTicket ? true : (newTripsRemaining <= 0);
   const ev = { ts, type: 'check', ticket_id, action, result: 'pass', station_code: exitCode, station_name: resolveStationName(exitCode), device, trips_remaining: newTripsRemaining };
   await DataService.appendTicketEvent(ev);
diff --git a/server/routes/public.js b/server/routes/public.js
index d5e0d4e..e19a59a 100644
--- a/server/routes/public.js
+++ b/server/routes/public.js
@@ -504,7 +504,7 @@ router.post('/tickets/record', async (req, res) => {
     const train_type = String(b.train_type || b.trainType || b.type || '').trim();
     const cost = Number(b.cost || 0) || 0;
     const station_code = String(b.station_code || b.stationCode || '').trim();
-    const device = String(b.device || b.device_id || b.deviceId || 'unknown');
+    const device = String(b.machine_id || b.machineId || b.device || b.device_id || b.deviceId || 'unknown');
 
     const trips_total = (b.trips_total == null) ? undefined : (Number(b.trips_total) || 0);
     const trips_remaining = (b.trips_remaining == null) ? undefined : (Number(b.trips_remaining) || 0);
diff --git a/web/ticket-order.html b/web/ticket-order.html
index 078ccff..224ba81 100644
--- a/web/ticket-order.html
+++ b/web/ticket-order.html
@@ -136,7 +136,7 @@
                   </label>
                 </div>
               </div>
-              <div class="jr-form-block jr-trip-block">
+              <div class="jr-form-block jr-trip-block" id="tripsBlock">
                 <div class="jr-field-head">
                   <label class="jr-field-label" for="trips">乘次数量</label>
                   <span class="jr-field-note">至少 1 次</span>
diff --git a/web/ticket-order.js b/web/ticket-order.js
index 60b3a76..86eb872 100644
--- a/web/ticket-order.js
+++ b/web/ticket-order.js
@@ -715,10 +715,13 @@
       if (isSingle) {
           document.getElementById('normalTicketView').style.display = 'none';
           document.getElementById('singleTicketView').style.display = 'block';
+          document.getElementById('tripsBlock').style.display = 'none';
+          if (tripsEl) tripsEl.value = 1;
           renderSingleSegments();
       } else {
           document.getElementById('normalTicketView').style.display = 'block';
           document.getElementById('singleTicketView').style.display = 'none';
+          document.getElementById('tripsBlock').style.display = 'block';
       }
       previewPrice(true);
   }