diff --git a/CHANGELOG.md b/CHANGELOG.md
index bb7022d..bbcd048 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,20 @@ O formato segue [Keep a Changelog](https://keepachangelog.com/pt-BR/).
 Este projeto adota [Versionamento Semântico](https://semver.org/pt-BR/).
 
 
+## [1.43.5] - 2025-12-16
+
+### Improved
+- **Página Liabilities - Mobile Otimizado** - Contas Passivo adaptadas para mobile
+  - Header: Layout flex-column, botão full-width, fontes reduzidas (1.1rem/0.75rem)
+  - Summary Cards: Grid 2 colunas mobile, sem ícones laterais, texto truncado
+  - Valores compactos: 0.9rem mobile vs 1.25rem desktop
+  - Filtros: Grid 50/50 mobile sem label, fontes 0.8rem
+  - Cards de Contratos: col-12 mobile, padding 0.75rem, fontes 0.65-0.85rem
+  - Progress bar: 6px mobile vs 8px desktop
+  - Botões: fontes 0.75rem mobile, mantém ícones e funcionalidade
+  - Desktop: Layout original preservado
+
+
 ## [1.43.4] - 2025-12-16
 
 ### Improved
diff --git a/VERSION b/VERSION
index 4aec498..5c898c3 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.43.4
+1.43.5
diff --git a/frontend/src/pages/LiabilityAccounts.jsx b/frontend/src/pages/LiabilityAccounts.jsx
index 648f551..21ca717 100644
--- a/frontend/src/pages/LiabilityAccounts.jsx
+++ b/frontend/src/pages/LiabilityAccounts.jsx
@@ -10,6 +10,15 @@ const LiabilityAccounts = () => {
   const toast = useToast();
   const { currency: formatCurrency } = useFormatters();
   
+  // Mobile detection
+  const [isMobile, setIsMobile] = useState(window.innerWidth < 768);
+
+  useEffect(() => {
+    const handleResize = () => setIsMobile(window.innerWidth < 768);
+    window.addEventListener('resize', handleResize);
+    return () => window.removeEventListener('resize', handleResize);
+  }, []);
+  
   // States
   const [accounts, setAccounts] = useState([]);
   const [summary, setSummary] = useState(null);
@@ -347,20 +356,22 @@ const LiabilityAccounts = () => {
   return (
     <div className="container-fluid py-3">
       {/* Header */}
-      <div className="d-flex justify-content-between align-items-center mb-4">
+      <div className={`d-flex ${isMobile ? 'flex-column gap-2' : 'justify-content-between align-items-center'} mb-4`}>
         <div>
-          <h4 className="mb-1">
+          <h4 className="mb-1" style={{ fontSize: isMobile ? '1.1rem' : '1.5rem' }}>
             <i className="bi bi-file-earmark-text me-2"></i>
             {t('liabilities.title')}
           </h4>
-          <small className="text-muted">{t('liabilities.subtitle')}</small>
+          <small className="text-muted" style={{ fontSize: isMobile ? '0.75rem' : '0.875rem' }}>
+            {t('liabilities.subtitle')}
+          </small>
         </div>
         <button 
-          className="btn btn-primary"
+          className={`btn btn-primary ${isMobile ? 'w-100' : ''}`}
           onClick={handleOpenImportModal}
         >
           <i className="bi bi-upload me-2"></i>
-          {t('liabilities.importContract')}
+          {isMobile ? t('common.import') : t('liabilities.importContract')}
         </button>
       </div>
 
@@ -369,9 +380,9 @@ const LiabilityAccounts = () => {
         <div className="row g-3 mb-4">
           {Object.entries(totalsByCurrency).map(([currency, totals]) => (
             <React.Fragment key={currency}>
-              <div className="col-md-3">
+              <div className={isMobile ? "col-6" : "col-md-3"}>
                 <div className="card bg-danger text-white h-100">
-                  <div className="card-body py-3">
+                  <div className="card-body" style={{ padding: isMobile ? '0.75rem' : '1rem' }}>
                     <div className="d-flex justify-content-between align-items-center">
                       <div>
                         <div className="small opacity-75">{t('liabilities.totalDebt')} ({currency})</div>
@@ -428,16 +439,19 @@ const LiabilityAccounts = () => {
 
       {/* Filters */}
       <div className="card mb-4">
-        <div className="card-body py-2">
-          <div className="row g-2 align-items-center">
-            <div className="col-auto">
-              <label className="col-form-label">{t('common.filter')}:</label>
-            </div>
-            <div className="col-auto">
+        <div className="card-body" style={{ padding: isMobile ? '0.75rem' : '1rem' }}>
+          <div className={`row g-2 ${isMobile ? '' : 'align-items-center'}`}>
+            {!isMobile && (
+              <div className="col-auto">
+                <label className="col-form-label">{t('common.filter')}:</label>
+              </div>
+            )}
+            <div className={isMobile ? "col-6" : "col-auto"}>
               <select
                 className="form-select form-select-sm"
                 value={filter.status}
                 onChange={(e) => setFilter(prev => ({ ...prev, status: e.target.value }))}
+                style={{ fontSize: isMobile ? '0.8rem' : '0.875rem' }}
               >
                 <option value="">{t('liabilities.allStatuses')}</option>
                 {Object.entries(liabilityAccountService.statuses).map(([key, label]) => (
@@ -445,11 +459,12 @@ const LiabilityAccounts = () => {
                 ))}
               </select>
             </div>
-            <div className="col-auto">
+            <div className={isMobile ? "col-6" : "col-auto"}>
               <select
                 className="form-select form-select-sm"
                 value={filter.is_active}
                 onChange={(e) => setFilter(prev => ({ ...prev, is_active: e.target.value }))}
+                style={{ fontSize: isMobile ? '0.8rem' : '0.875rem' }}
               >
                 <option value="">{t('common.all')}</option>
                 <option value="1">{t('common.active')}</option>
@@ -482,21 +497,25 @@ const LiabilityAccounts = () => {
       ) : (
         <div className="row g-3">
           {accounts.map(account => (
-            <div key={account.id} className="col-md-6 col-lg-4">
+            <div key={account.id} className={isMobile ? "col-12" : "col-md-6 col-lg-4"}>
               <div className="card h-100">
-                <div className="card-header d-flex justify-content-between align-items-center">
-                  <div className="d-flex align-items-center">
+                <div className="card-header d-flex justify-content-between align-items-center" 
+                     style={{ padding: isMobile ? '0.75rem' : '1rem' }}>
+                  <div className="d-flex align-items-center" style={{ minWidth: 0, flex: 1, marginRight: '0.5rem' }}>
                     <i className={`${account.icon || 'bi-file-earmark-text'} me-2`} 
-                       style={{ color: account.color || '#DC2626' }}></i>
-                    <strong>{account.name}</strong>
+                       style={{ color: account.color || '#DC2626', fontSize: isMobile ? '0.9rem' : '1rem' }}></i>
+                    <strong style={{ fontSize: isMobile ? '0.85rem' : '1rem' }} className="text-truncate">
+                      {account.name}
+                    </strong>
                   </div>
-                  <span className={`badge ${getStatusBadge(account.status)}`}>
+                  <span className={`badge ${getStatusBadge(account.status)}`} 
+                        style={{ fontSize: isMobile ? '0.65rem' : '0.75rem', flexShrink: 0 }}>
                     {getStatusLabel(account.status)}
                   </span>
                 </div>
-                <div className="card-body">
+                <div className="card-body" style={{ padding: isMobile ? '0.75rem' : '1rem' }}>
                   {account.creditor && (
-                    <div className="small text-muted mb-2">
+                    <div className="text-muted mb-2" style={{ fontSize: isMobile ? '0.7rem' : '0.875rem' }}>
                       <i className="bi bi-building me-1"></i>
                       {account.creditor}
                     </div>
@@ -504,11 +523,12 @@ const LiabilityAccounts = () => {
                   
                   {/* Progress Bar */}
                   <div className="mb-3">
-                    <div className="d-flex justify-content-between small mb-1">
+                    <div className="d-flex justify-content-between mb-1" 
+                         style={{ fontSize: isMobile ? '0.7rem' : '0.875rem' }}>
                       <span>{t('liabilities.progress')}</span>
-                      <span>{account.progress_percentage || 0}%</span>
+                      <span className="fw-bold">{account.progress_percentage || 0}%</span>
                     </div>
-                    <div className="progress" style={{ height: '8px' }}>
+                    <div className="progress" style={{ height: isMobile ? '6px' : '8px' }}>
                       <div 
                         className="progress-bar bg-success" 
                         style={{ width: `${account.progress_percentage || 0}%` }}
@@ -517,30 +537,39 @@ const LiabilityAccounts = () => {
                   </div>
                   
                   {/* Values */}
-                  <div className="row g-2 small">
+                  <div className="row g-2" style={{ fontSize: isMobile ? '0.75rem' : '0.875rem' }}>
                     <div className="col-6">
-                      <div className="text-muted">{t('liabilities.principal')}</div>
+                      <div className="text-muted" style={{ fontSize: isMobile ? '0.65rem' : '0.75rem' }}>
+                        {t('liabilities.principal')}
+                      </div>
                       <div className="fw-bold">{formatCurrency(account.principal_amount, account.currency)}</div>
                     </div>
                     <div className="col-6">
-                      <div className="text-muted">{t('liabilities.remaining')}</div>
+                      <div className="text-muted" style={{ fontSize: isMobile ? '0.65rem' : '0.75rem' }}>
+                        {t('liabilities.remaining')}
+                      </div>
                       <div className="fw-bold text-danger">{formatCurrency(account.remaining_balance, account.currency)}</div>
                     </div>
                     <div className="col-6">
-                      <div className="text-muted">{t('liabilities.installments')}</div>
+                      <div className="text-muted" style={{ fontSize: isMobile ? '0.65rem' : '0.75rem' }}>
+                        {t('liabilities.installments')}
+                      </div>
                       <div className="fw-bold">{account.paid_installments}/{account.total_installments}</div>
                     </div>
                     <div className="col-6">
-                      <div className="text-muted">{t('liabilities.monthlyRate')}</div>
+                      <div className="text-muted" style={{ fontSize: isMobile ? '0.65rem' : '0.75rem' }}>
+                        {t('liabilities.monthlyRate')}
+                      </div>
                       <div className="fw-bold">{formatPercent(account.monthly_interest_rate)}</div>
                     </div>
                   </div>
                 </div>
-                <div className="card-footer bg-transparent">
+                <div className="card-footer bg-transparent" style={{ padding: isMobile ? '0.75rem' : '1rem' }}>
                   <div className="d-flex gap-2">
                     <button 
                       className="btn btn-sm btn-outline-primary flex-grow-1"
                       onClick={() => handleOpenDetail(account)}
+                      style={{ fontSize: isMobile ? '0.75rem' : '0.875rem' }}
                     >
                       <i className="bi bi-eye me-1"></i>
                       {t('common.details')}
@@ -551,6 +580,7 @@ const LiabilityAccounts = () => {
                         setSelectedAccount(account);
                         setShowDeleteModal(true);
                       }}
+                      style={{ fontSize: isMobile ? '0.75rem' : '0.875rem' }}
                     >
                       <i className="bi bi-trash"></i>
                     </button>