diff --git a/src/lib/monitor/reminder-engine.ts b/src/lib/monitor/reminder-engine.ts
index 8b5a764..0bb9783 100644
--- a/src/lib/monitor/reminder-engine.ts
+++ b/src/lib/monitor/reminder-engine.ts
@@ -188,11 +188,15 @@ export class ReminderEngine {
           continue
         }
         const rackRB = getRack ? await getRack(r.server_ip, r.server_sn) : null
-        let text = `⏰ OEM维修工单提醒（距离${r.tier_name}超时还剩1小时）\n\n`
+        // 第五档用紧急图标，其他档位用普通图标
+        const tierIcon = r.tier_name === '第五档' ? '🚨' : '⏰'
+        const tierDesc = r.tier_name === '第五档' ? '扣100%' : r.tier_name === '第四档' ? '扣50%' : ''
+        let text = `${tierIcon} OEM维修工单提醒（距离${r.tier_name}${tierDesc ? `（${tierDesc}）` : ''}超时还剩1小时）\n\n`
         if (r.order_number) text += `工单号：${r.order_number}\n`
         text += `服务器IP：${r.server_ip || '未知'}\n服务器SN：${r.server_sn}\n`
         if (rackRB) text += `机架位置：${rackRB}\n`
         text += `${r.tier_name}到期时间：${r.deadline_time}\n服务器尚未录入恢复时间，请及时处理！`
+        if (r.tier_name === '第五档') text += `\n\n⚠️ 请注意：第五档超时后将触发全额扣费（100%），请立即处理！`
         if (await pushText(text)) {
           this.db.prepare("UPDATE reminder_state SET notification_phase = 'before', notified_at = datetime('now', '+8 hours') WHERE id = ?").run(r.id)
         }