@media (max-width: 992px) {
    .app-container {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        height: auto;
    }
    
    .logo h3 {
        font-size: 1.2rem;
    }
    
    .nav-items {
        display: flex;
        flex-wrap: wrap;
    }
    
    .nav-item {
        flex: 1 0 45%;
        text-align: left;
    }
}

/* Mobile Responsive Styles */
@media (max-width: 768px) {
    .app-container {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        position: fixed;
        left: -100%;
        top: 0;
        height: 100vh;
        z-index: 1050;
        transition: all 0.3s ease;
    }

    .sidebar.active {
        left: 0;
    }

    .main-content {
        margin-left: 0;
        width: 100%;
        padding: 10px;
        margin-top: 60px;
    }

    .page-header {
        flex-direction: column;
        align-items: flex-start !important;
        gap: 10px;
        padding: 10px;
        margin-bottom: 15px;
    }

    .page-header h2 {
        font-size: 1.3rem;
        margin-bottom: 10px;
    }

    .page-header .d-flex {
        width: 100%;
        flex-wrap: wrap;
        gap: 8px !important;
    }

    .page-header .btn {
        width: 100%;
        margin-bottom: 8px;
    }

    .stat-badge {
        flex: 1 1 100%;
        width: 100%;
        padding: 12px 15px;
        font-size: 0.9rem;
        white-space: normal;
        text-align: center;
        display: block;
        box-sizing: border-box;
    }

    .dashboard-card {
        margin-bottom: 15px;
    }

    .table-responsive {
        margin-bottom: 15px;
        overflow-x: auto;
    }

    .table-responsive table {
        border: 1px solid #ddd;
        min-width: 800px;
    }

    .mobile-nav-toggle {
        position: fixed;
        top: 10px;
        left: 10px;
        z-index: 1060;
        display: block;
        padding: 10px 14px;
        font-size: 1.1rem;
        background: linear-gradient(135deg, var(--tech-blue-mid), var(--tech-blue-light));
        border: 1px solid rgba(65, 180, 255, 0.3);
        border-radius: 8px;
        color: white;
        box-shadow: 0 4px 15px rgba(20, 66, 114, 0.4);
        transition: all 0.3s ease;
    }

    .mobile-nav-toggle:hover {
        background: linear-gradient(135deg, var(--tech-blue-light), var(--tech-blue-accent));
        box-shadow: 0 6px 20px rgba(65, 180, 255, 0.5);
        transform: translateY(-2px);
    }

    .mobile-nav-toggle:active {
        transform: translateY(0);
    }

    .dashboard-stats-row {
        display: flex;
        flex-wrap: nowrap;
        overflow-x: auto;
        margin: 0 -10px;
        padding: 0 10px;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }

    .dashboard-stats-row::-webkit-scrollbar {
        display: none;
    }

    .dashboard-stats-row .col-md-3,
    .dashboard-stats-row .col-sm-6 {
        flex: 0 0 200px;
        max-width: 200px;
        margin-right: 10px;
        margin-bottom: 0;
    }

    /* 新增订单弹窗移动端优化 */
    #addOrderModal .modal-dialog,
    #viewOrderModal .modal-dialog {
        max-width: 100%;
        margin: 0;
        height: 100vh;
    }

    #addOrderModal .modal-content,
    #viewOrderModal .modal-content {
        height: 100vh;
        border-radius: 0;
        display: flex;
        flex-direction: column;
    }

    #addOrderModal .modal-header,
    #viewOrderModal .modal-header {
        padding: 12px 15px;
        border-radius: 0;
        flex-shrink: 0;
    }

    #addOrderModal .modal-title,
    #viewOrderModal .modal-title {
        font-size: 1.1rem;
    }

    #addOrderModal .modal-body,
    #viewOrderModal .modal-body {
        flex: 1;
        overflow-y: auto;
        padding: 10px;
        max-height: none;
    }

    #addOrderModal .modal-footer,
    #viewOrderModal .modal-footer {
        padding: 10px 15px;
        flex-shrink: 0;
    }

    /* 订单表单紧凑布局 */
    #addOrderModal .form-label {
        font-size: 0.85rem;
        margin-bottom: 4px;
        font-weight: 600;
    }

    #addOrderModal .form-control,
    #addOrderModal .form-select {
        font-size: 0.9rem;
        padding: 6px 10px;
        height: auto;
    }

    #addOrderModal .mb-3 {
        margin-bottom: 10px !important;
    }

    #addOrderModal .customer-row {
        padding: 8px;
        margin-bottom: 10px;
    }

    #addOrderModal .row {
        margin-left: -5px;
        margin-right: -5px;
    }

    #addOrderModal .row > [class*="col-"] {
        padding-left: 5px;
        padding-right: 5px;
    }

    /* 商品表格紧凑布局 */
    #addOrderModal table {
        font-size: 0.8rem;
    }

    #addOrderModal table th,
    #addOrderModal table td {
        padding: 6px 4px;
        vertical-align: middle;
    }

    #addOrderModal table input[type="number"] {
        font-size: 0.85rem;
        padding: 4px;
        min-width: 50px;
    }

    #addOrderModal .btn-sm {
        padding: 4px 8px;
        font-size: 0.8rem;
    }

    /* 底部总计栏紧凑 */
    #addOrderModal .sticky-summary {
        padding: 8px 15px;
        font-size: 0.9rem;
    }

    /* 按钮组紧凑 */
    #addOrderModal .modal-footer .btn {
        padding: 8px 16px;
        font-size: 0.9rem;
    }
}