/* ===== 全局样式 ===== */
        :root {
            --primary: #0b5e8a;
            --primary-light: #e8f4fd;
            --primary-dark: #083b5a;
            --danger: #c62828;
            --warning: #e67700;
            --success: #2e7d32;
            --gray: #6c757d;
            --light-gray: #f5f7fa;
            --border: #dce1e8;
            --shadow: 0 2px 12px rgba(0,0,0,0.06);
            --radius: 8px;
            --radius-sm: 4px;
            --font: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
            --header-height: 56px;
            --toolbar-gap: 6px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: var(--font);
            background: #f0f4f8;
            color: #1a2634;
            padding: 12px 16px;
            font-size: 14px;
            line-height: 1.5;
            min-height: 100vh;
        }
        .app-container {
            max-width: 100%;
            margin: 0 auto;
        }

        /* ===== 头部 ===== */
        .app-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px 12px;
            margin-bottom: 16px;
        }
        .app-header h1 {
            font-size: 20px;
            font-weight: 600;
            color: var(--primary-dark);
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }
        .app-header h1 small {
            font-size: 11px;
            font-weight: 400;
            color: var(--gray);
            background: var(--light-gray);
            padding: 2px 8px;
            border-radius: 20px;
            line-height: 1.4;
        }
        .header-actions {
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
        }
        .header-actions .btn {
            font-size: 12px;
            padding: 4px 10px;
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 6px 12px;
            border: none;
            border-radius: var(--radius-sm);
            font-size: 13px;
            font-weight: 500;
            cursor: pointer;
            transition: all 0.15s;
            background: var(--light-gray);
            color: #1a2634;
            white-space: nowrap;
            touch-action: manipulation;
        }
        .btn:hover {
            filter: brightness(0.94);
            transform: translateY(-1px);
        }
        .btn:active {
            transform: scale(0.97);
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--primary-dark);
        }
        .btn-success {
            background: var(--success);
            color: #fff;
        }
        .btn-danger {
            background: var(--danger);
            color: #fff;
        }
        .btn-warning {
            background: var(--warning);
            color: #fff;
        }
        .btn-outline {
            background: transparent;
            border: 1px solid var(--border);
        }
        .btn-sm {
            padding: 3px 8px;
            font-size: 12px;
        }
        .btn-config {
            background: #fd7e14;
            color: #fff;
        }
        .btn-export {
            background: #1e7e34;
            color: #fff;
        }
        .btn-import {
            background: #6f42c1;
            color: #fff;
        }
        .file-input-hidden {
            display: none;
        }

        /* ===== 统计卡片 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 10px;
            margin-bottom: 16px;
        }
        /* 折叠开关：仅移动端显示，桌面端隐藏 */
        .mobile-toggle {
            display: none;
        }
        .stat-card {
            background: #fff;
            border-radius: var(--radius);
            padding: 12px 14px;
            box-shadow: var(--shadow);
            border-left: 4px solid var(--primary);
            transition: transform 0.1s;
        }
        .stat-card .label {
            font-size: 11px;
            color: var(--gray);
            font-weight: 500;
            margin-bottom: 2px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .stat-card .value {
            font-size: 20px;
            font-weight: 700;
            color: var(--primary-dark);
            font-feature-settings: "tnum";
            line-height: 1.2;
        }
        .stat-card .sub {
            font-size: 11px;
            color: var(--gray);
            margin-top: 2px;
        }
        .stat-card.danger {
            border-left-color: var(--danger);
        }
        .stat-card.danger .value {
            color: var(--danger);
        }
        .stat-card.warning {
            border-left-color: var(--warning);
        }
        .stat-card.warning .value {
            color: var(--warning);
        }
        .stat-card.success {
            border-left-color: var(--success);
        }
        .stat-card.success .value {
            color: var(--success);
        }

        /* ===== 工具栏 ===== */
        .toolbar {
            background: #fff;
            border-radius: var(--radius);
            padding: 10px 14px;
            box-shadow: var(--shadow);
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 6px 12px;
            margin-bottom: 16px;
        }
        .toolbar-group {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: wrap;
        }
        .toolbar-group label {
            font-size: 12px;
            font-weight: 500;
            color: var(--gray);
            white-space: nowrap;
        }
        .toolbar select,
        .toolbar input {
            padding: 4px 8px;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            font-size: 12px;
            outline: none;
            min-width: 80px;
            background: #fff;
            max-width: 100%;
        }
        .toolbar select:focus,
        .toolbar input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(11, 94, 138, 0.1);
        }
        .toolbar .search-input {
            min-width: 120px;
            flex: 1;
        }
        .toolbar .checkbox-label {
            display: flex;
            align-items: center;
            gap: 4px;
            font-size: 12px;
            color: var(--gray);
            cursor: pointer;
        }
        .toolbar .checkbox-label input[type="checkbox"] {
            width: 14px;
            height: 14px;
            margin: 0;
            cursor: pointer;
        }
        .toolbar .result-stats {
            font-size: 12px;
            color: var(--gray);
            margin-left: 4px;
        }

        /* ===== 表格 ===== */
        .table-wrapper {
            background: #fff;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            overflow: hidden;
            margin-bottom: 12px;
        }
        .table-scroll {
            overflow-x: auto;
            padding: 0 2px;
            max-height: 70vh;
            overflow-y: auto;
            -webkit-overflow-scrolling: touch;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 13px;
            min-width: 900px;
        }
        thead {
            background: var(--light-gray);
            position: sticky;
            top: 0;
            z-index: 10;
        }
        th {
            padding: 8px 10px;
            text-align: left;
            font-weight: 600;
            color: var(--primary-dark);
            font-size: 11px;
            text-transform: uppercase;
            letter-spacing: 0.3px;
            border-bottom: 2px solid var(--border);
            cursor: pointer;
            user-select: none;
            white-space: nowrap;
            position: relative;
        }
        th:hover {
            background: #e8ecf0;
        }
        th.sort-asc::after {
            content: " ▲";
            font-size: 10px;
        }
        th.sort-desc::after {
            content: " ▼";
            font-size: 10px;
        }
        th .checkbox {
            display: inline-block;
            margin-right: 4px;
        }
        td {
            padding: 6px 10px;
            border-bottom: 1px solid #f0f2f5;
            vertical-align: middle;
            white-space: nowrap;
        }
        tr:hover {
            background: var(--primary-light);
        }

        /* 分组行 */
        .group-row {
            background: #f8fafc;
            font-weight: 600;
            cursor: pointer;
            border-top: 2px solid var(--border);
        }
        .group-row:hover {
            background: #f0f4f8;
        }
        .group-row td {
            padding: 4px 10px;
            font-size: 12px;
        }
        .group-contract {
            color: var(--primary-dark);
        }
        .group-count {
            color: var(--gray);
            margin-left: 6px;
        }
        .group-amount {
            float: right;
            font-weight: 700;
            font-size: 14px;
        }

        /* 数据行 */
        .data-row {
            transition: background 0.1s;
        }
        .data-row.status-overdue {
            background: #fff5f5;
        }
        .data-row.status-overdue:hover {
            background: #ffebeb;
        }
        .data-row.status-paid {
            opacity: 0.6;
        }
        .data-row.row-archived {
            background: #f5f5f5;
            color: #888;
        }
        .col-checkbox {
            width: 30px;
            text-align: center;
        }
        .col-checkbox input[type="checkbox"] {
            width: 16px;
            height: 16px;
            cursor: pointer;
        }

        /* 徽章 */
        .badge {
            display: inline-block;
            padding: 2px 8px;
            border-radius: 20px;
            font-size: 11px;
            font-weight: 600;
        }
        .badge-overdue {
            background: #ffcdd2;
            color: var(--danger);
        }
        .badge-warning {
            background: #fff3cd;
            color: var(--warning);
        }
        .badge-paid {
            background: #c8e6c9;
            color: var(--success);
        }
        .badge-normal {
            background: #e3f0fd;
            color: var(--primary);
        }
        .badge-legal {
            background: #e1bee7;
            color: #4a148c;
        }
        .col-amount {
            text-align: right;
            font-feature-settings: "tnum";
            font-variant-numeric: tabular-nums;
        }
        .col-center {
            text-align: center;
        }
        .status-dot {
            display: inline-block;
            width: 7px;
            height: 7px;
            border-radius: 50%;
            margin-right: 4px;
        }
        .status-dot.overdue {
            background: var(--danger);
        }
        .status-dot.warning {
            background: var(--warning);
        }
        .status-dot.paid {
            background: var(--success);
        }
        .status-dot.normal {
            background: var(--primary);
        }

        .actions-cell {
            display: flex;
            gap: 3px;
            flex-wrap: wrap;
        }

        /* ===== 空状态 ===== */
        .empty-state {
            text-align: center;
            padding: 30px 20px;
            color: var(--gray);
        }
        .empty-state .icon {
            font-size: 32px;
            margin-bottom: 6px;
            opacity: 0.5;
        }

        /* ===== 底部 ===== */
        .footer-info {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 12px;
            color: var(--gray);
            padding: 6px 2px;
            flex-wrap: wrap;
            gap: 6px;
        }
        .pagination {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .pagination button {
            padding: 2px 8px;
            border: 1px solid var(--border);
            background: #fff;
            border-radius: var(--radius-sm);
            cursor: pointer;
            font-size: 12px;
        }
        .pagination button:hover {
            background: var(--light-gray);
        }
        .pagination .current {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        /* ===== 模态框 ===== */
        .modal-overlay {
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.35);
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 999;
            padding: 12px;
            opacity: 0;
            visibility: hidden;
            transition: all 0.2s;
        }
        .modal-overlay.active {
            opacity: 1;
            visibility: visible;
        }
        .modal {
            background: #fff;
            border-radius: var(--radius);
            max-width: 900px;
            width: 100%;
            max-height: 90vh;
            overflow-y: auto;
            padding: 16px 18px;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
            transform: translateY(20px);
            transition: transform 0.25s;
        }
        .modal-overlay.active .modal {
            transform: translateY(0);
        }
        .modal-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 14px;
            padding-bottom: 10px;
            border-bottom: 1px solid var(--border);
        }
        .modal-header h2 {
            font-size: 18px;
            font-weight: 600;
            color: var(--primary-dark);
        }
        .modal-close {
            background: none;
            border: none;
            font-size: 22px;
            cursor: pointer;
            color: var(--gray);
            width: 32px;
            height: 32px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            transition: 0.2s;
        }
        .modal-close:hover {
            background: var(--light-gray);
        }

        /* ===== 表单 ===== */
        .form-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 10px 14px;
        }
        .form-grid .full-width {
            grid-column: 1 / -1;
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 2px;
        }
        .form-group label {
            font-size: 12px;
            font-weight: 500;
            color: #2d3a48;
        }
        .form-group label .required {
            color: var(--danger);
            margin-right: 2px;
        }
        .form-group input,
        .form-group select,
        .form-group textarea {
            padding: 6px 10px;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            font-size: 13px;
            font-family: var(--font);
            outline: none;
            transition: 0.15s;
            background: #fff;
            width: 100%;
        }
        .form-group input:focus,
        .form-group select:focus,
        .form-group textarea:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(11, 94, 138, 0.08);
        }
        .form-group textarea {
            resize: vertical;
            min-height: 50px;
        }
        .form-group .tip {
            font-size: 11px;
            color: var(--gray);
            margin-top: 2px;
        }
        .form-group .error-tip {
            font-size: 11px;
            color: var(--danger);
            margin-top: 2px;
            display: none;
        }
        .form-group .error-tip.show {
            display: block;
        }
        .form-actions {
            display: flex;
            justify-content: flex-end;
            gap: 10px;
            margin-top: 16px;
            padding-top: 14px;
            border-top: 1px solid var(--border);
        }

        /* 催收记录 */
        .collection-section {
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 10px;
            background: #fafbfc;
        }
        .collection-list {
            max-height: 180px;
            overflow-y: auto;
            margin-bottom: 8px;
        }
        .collection-item {
            display: grid;
            grid-template-columns: 80px 60px 60px 1fr 80px 60px;
            gap: 4px;
            align-items: center;
            padding: 4px 0;
            border-bottom: 1px solid #eee;
            font-size: 12px;
        }
        .collection-item:last-child {
            border-bottom: none;
        }
        .collection-add {
            display: grid;
            grid-template-columns: 80px 60px 60px 1fr 80px 60px;
            gap: 4px;
            margin-top: 6px;
        }
        .collection-add input,
        .collection-add select {
            padding: 4px 6px;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            font-size: 12px;
            background: white;
            width: 100%;
        }
        .collection-item .col-date {
            font-weight: 500;
        }
        .collection-item .col-method {
            color: var(--primary);
        }
        .collection-item .col-evidence {
            color: var(--gray);
            font-size: 11px;
        }

        /* ===== 配置面板 ===== */
        .config-section {
            margin-bottom: 16px;
        }
        .config-section h3 {
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--primary-dark);
        }
        .config-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 4px 10px;
            background: #f8fafc;
            border-radius: var(--radius-sm);
            margin-bottom: 4px;
        }
        .config-item .item-name {
            font-weight: 500;
        }
        .config-item .item-actions {
            display: flex;
            gap: 4px;
        }

        /* ===== 其他 ===== */
        .limitation-urgent {
            color: var(--danger);
            font-weight: 700;
        }
        .limitation-warning {
            color: var(--warning);
            font-weight: 600;
        }
        .limitation-safe {
            color: var(--success);
        }
        #loadingMask {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.4);
            z-index: 9999;
            justify-content: center;
            align-items: center;
            font-size: 18px;
            color: #fff;
            backdrop-filter: blur(2px);
        }
        #loadingMask.show {
            display: flex;
        }
        .backup-warning {
            background: #fff3cd;
            color: #856404;
            padding: 6px 16px;
            border-radius: var(--radius-sm);
            font-size: 12px;
            margin-bottom: 12px;
            display: none;
        }
        .backup-warning.show {
            display: block;
        }
        .history-btn {
            font-size: 12px;
            padding: 2px 10px;
            background: #e3f0fd;
            border: none;
            border-radius: 12px;
            cursor: pointer;
        }
        .toast {
            position: fixed;
            bottom: 20px;
            left: 50%;
            transform: translateX(-50%);
            background: #333;
            color: #fff;
            padding: 8px 16px;
            border-radius: 8px;
            font-size: 14px;
            z-index: 10000;
            opacity: 0;
            transition: opacity 0.3s;
            pointer-events: none;
            max-width: 90%;
            text-align: center;
        }
        .toast.show {
            opacity: 1;
        }
        .toast.success {
            background: var(--success);
        }
        .toast.error {
            background: var(--danger);
        }
        .toast.warning {
            background: var(--warning);
        }
        .scroll-lock {
            overflow: hidden;
        }
        .key-setup-modal .modal {
            max-width: 480px;
        }
        .remember-key {
            margin-top: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--gray);
        }
        .remember-key input[type="checkbox"] {
            width: 16px;
            height: 16px;
            cursor: pointer;
        }
        .inline-select-modal .modal {
            max-width: 400px;
        }
        .inline-select-modal select {
            width: 100%;
            padding: 8px 12px;
            font-size: 14px;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
        }
        .provision-rule-item {
            display: grid;
            grid-template-columns: 50px 50px 70px 80px;
            gap: 6px;
            align-items: center;
            padding: 4px 0;
            border-bottom: 1px solid #eee;
            font-size: 13px;
        }
        .provision-rule-item .rule-actions {
            display: flex;
            gap: 4px;
        }
        .provision-add {
            display: grid;
            grid-template-columns: 50px 50px 70px 80px;
            gap: 6px;
            margin-top: 8px;
            align-items: center;
        }
        .provision-add input {
            padding: 4px 6px;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            font-size: 12px;
            width: 100%;
        }
        .merge-btn {
            margin-left: 8px;
            font-size: 11px;
            padding: 2px 8px;
            background: var(--warning);
            color: #fff;
            border: none;
            border-radius: var(--radius-sm);
            cursor: pointer;
        }
        .merge-btn:hover {
            filter: brightness(0.9);
        }

        /* ===== 移动端适配增强 ===== */
        /* 小屏幕 (宽度 < 768px) */
        @media (max-width: 767px) {
            body {
                padding: 8px 10px;
                font-size: 13px;
            }
            .app-header h1 {
                font-size: 18px;
            }
            .app-header h1 small {
                font-size: 10px;
            }
            .header-actions {
                gap: 4px;
            }
            .header-actions .btn {
                font-size: 11px;
                padding: 3px 8px;
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 6px;
            }
            .stat-card {
                padding: 8px 10px;
            }
            .stat-card .value {
                font-size: 18px;
            }
            .stat-card .label {
                font-size: 10px;
            }

            .toolbar {
                flex-direction: column;
                align-items: stretch;
                gap: 6px;
                padding: 8px 10px;
            }
            .toolbar-group {
                flex-wrap: wrap;
                justify-content: flex-start;
            }
            .toolbar select,
            .toolbar input {
                min-width: 60px;
                font-size: 11px;
                padding: 4px 6px;
            }
            .toolbar .search-input {
                min-width: 100%;
            }
            .toolbar .result-stats {
                font-size: 11px;
            }

            /* 移动端：统计区与工具栏可折叠（默认收起，点击展开） */
            .mobile-toggle {
                display: flex;
                align-items: center;
                justify-content: space-between;
                margin-top: 14px;
                padding: 11px 14px;
                background: #fff;
                border: 1px solid var(--border);
                border-radius: var(--radius);
                font-weight: 600;
                color: var(--primary-dark);
                cursor: pointer;
                -webkit-tap-highlight-color: transparent;
                box-shadow: 0 1px 3px rgba(15, 23, 42, .04);
            }
            .mobile-toggle .chev {
                transition: transform .2s ease;
                font-size: 12px;
                color: var(--gray);
            }
            .mobile-toggle.open .chev {
                transform: rotate(90deg);
            }
            .collapsible {
                display: none;
            }
            .stats-grid.collapsible.open {
                display: grid;
            }
            .toolbar.collapsible.open {
                display: flex;
            }

            .table-scroll {
                max-height: 60vh;
            }
            table {
                font-size: 12px;
                min-width: 700px;
            }
            th,
            td {
                padding: 4px 6px;
            }
            th {
                font-size: 10px;
            }
            .col-checkbox {
                width: 24px;
            }
            .col-checkbox input[type="checkbox"] {
                width: 14px;
                height: 14px;
            }
            .actions-cell .btn {
                font-size: 10px;
                padding: 2px 6px;
            }

            .group-row td {
                font-size: 11px;
                padding: 3px 6px;
            }
            .group-amount {
                font-size: 12px;
            }

            .modal {
                padding: 12px 14px;
                max-width: 100%;
                margin: 8px;
            }
            .form-grid {
                grid-template-columns: 1fr;
                gap: 8px;
            }
            .form-group input,
            .form-group select,
            .form-group textarea {
                font-size: 16px; /* 防止iOS缩放 */
                padding: 6px 8px;
            }
            .form-actions {
                flex-direction: column;
            }
            .form-actions .btn {
                width: 100%;
                justify-content: center;
                padding: 8px;
            }

            .collection-item {
                grid-template-columns: 60px 50px 50px 1fr 60px 50px;
                font-size: 11px;
                gap: 3px;
            }
            .collection-add {
                grid-template-columns: 60px 50px 50px 1fr 60px 50px;
                gap: 3px;
            }
            .collection-add input,
            .collection-add select {
                font-size: 11px;
                padding: 3px 4px;
            }

            .pagination button {
                padding: 2px 6px;
                font-size: 11px;
            }
            .footer-info {
                font-size: 11px;
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
            }
            .footer-info .pagination {
                justify-content: center;
            }

            .toast {
                font-size: 13px;
                padding: 6px 12px;
                bottom: 12px;
            }

            .provision-rule-item {
                grid-template-columns: 40px 40px 60px 70px;
                font-size: 12px;
            }
            .provision-add {
                grid-template-columns: 40px 40px 60px 70px;
            }

            .config-item {
                font-size: 12px;
                padding: 3px 8px;
            }
            .config-item .item-actions .btn {
                font-size: 10px;
                padding: 2px 6px;
            }

            .key-setup-modal .modal {
                max-width: 100%;
            }
            .inline-select-modal .modal {
                max-width: 100%;
            }
            .inline-select-modal select {
                font-size: 16px;
            }

            /* 隐藏部分列以提高可读性（可选择性隐藏） */
            /* 例如隐藏“逾期天数”列，但保留状态徽章 */
            /* 这里不强制隐藏，由用户滚动查看 */
        }

        /* 超小屏 (宽度 < 480px) */
        @media (max-width: 479px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 4px;
            }
            .stat-card {
                padding: 6px 8px;
            }
            .stat-card .value {
                font-size: 16px;
            }

            .header-actions .btn {
                font-size: 10px;
                padding: 2px 6px;
            }
            .app-header h1 {
                font-size: 16px;
            }

            .table-scroll {
                max-height: 50vh;
            }
            table {
                font-size: 11px;
                min-width: 600px;
            }
            th,
            td {
                padding: 3px 4px;
            }
        }

        /* 打印样式 */
        @media print {
            body {
                background: #fff;
                padding: 10px;
            }
            .app-header,
            .toolbar,
            .header-actions,
            .footer-info .pagination,
            .btn,
            .actions-cell,
            .backup-warning {
                display: none !important;
            }
            .table-wrapper {
                box-shadow: none;
                border: 1px solid #ddd;
            }
            table {
                font-size: 11px;
            }
            .group-row {
                background: #f0f0f0 !important;
                -webkit-print-color-adjust: exact;
                print-color-adjust: exact;
            }
            .data-row.status-overdue {
                background: #ffe6e6 !important;
                -webkit-print-color-adjust: exact;
                print-color-adjust: exact;
            }
            .data-row.status-paid {
                opacity: 0.7;
            }
            .stat-card {
                border: 1px solid #ddd;
                box-shadow: none;
            }
        }

        /* ===== v4.9 修复：缺失的工具类 ===== */
        .hidden {
            display: none !important;
        }
        .text-danger {
            color: var(--danger) !important;
        }