body {
            font-family: Arial, sans-serif;
            max-width: 800px;
            margin: 0 auto;
            padding: 20px;
            background-color: #f5f5f5;
        }
        .container {
            background-color: white;
            padding: 30px;
            border-radius: 10px;
            box-shadow: 0 0 10px rgba(0,0,0,0.1);
        }
        h1 {
            text-align: center;
            color: #333;
        }
        .form-group {
            margin-bottom: 15px;
            position: relative;
        }
        label {
            display: block;
            margin-bottom: 5px;
            font-weight: bold;
        }
        
        .required {
            color: red;
            color: #ff0000;
            margin-right: 5px;
        }
        input[type="number"] {
            width: 100%;
            padding: 8px;
            border: 1px solid #ddd;
            border-radius: 4px;
            box-sizing: border-box;
            /* 隐藏上下箭头 */
            -moz-appearance: textfield;
            -webkit-appearance: none;
            appearance: none;
        }
        
        input[type="text"] {
            width: 100%;
            padding: 8px;
            border: 1px solid #ddd;
            border-radius: 4px;
            box-sizing: border-box;
        }
        
        .building-name-input {
            width: 100%;
            padding: 8px;
            border: 1px solid #ddd;
            border-radius: 4px;
            box-sizing: border-box;
        }
        
        .room-number-input {
            width: 100%;
            padding: 8px;
            border: 1px solid #ddd;
            border-radius: 4px;
            box-sizing: border-box;
        }
        
        .billing-date-input {
            width: 100%;
            padding: 8px;
            border: 1px solid #ddd;
            border-radius: 4px;
            box-sizing: border-box;
        }
        
        /* 针对Chrome, Safari, Edge等WebKit/Blink内核浏览器隐藏数字输入框的上下箭头 */
        input[type="number"]::-webkit-inner-spin-button,
        input[type="number"]::-webkit-outer-spin-button {
            -webkit-appearance: none;
            margin: 0;
        }
        
        /* 针对Firefox浏览器隐藏数字输入框的上下箭头 */
        input[type="number"]::-moz-number-spin-box,
        input[type="number"]::-moz-number-spin-up,
        input[type="number"]::-moz-number-spin-down {
            -moz-appearance: none;
        }
        
        /* 确保在移动设备上也保持一致的体验 */
        input[type=number] {
            -moz-appearance: textfield;
            -webkit-appearance: none;
            appearance: none;
        }
        .price-control {
            display: flex;
            gap: 10px;
        }
        .price-control input {
            flex: 1;
        }
        button {
            background-color: #007bff;
            color: white;
            padding: 10px 20px;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            width: 100%;
            font-size: 16px;
            margin-bottom: 20px;
        }
        button:hover {
            background-color: #0056b3;
        }
        .toggle-btn {
            background-color: #28a745;
            width: auto;
            margin-top: 5px;
            padding: 5px 10px;
            font-size: 14px;
        }
        .toggle-btn.locked {
            background-color: #ffc107;
            color: #212529;
        }
        #clearButton {
            background-color: #6c757d;
            margin-bottom: 10px;
        }
        #clearButton:hover {
            background-color: #5a6268;
        }
        
        #saveImageButton {
            background-color: #28a745;
            margin-bottom: 10px;
        }
        #saveImageButton:hover {
            background-color: #218838;
        }
        .result {
            margin-top: 20px;
            padding: 15px;
            background-color: #e9f7ef;
            border-radius: 4px;
            text-align: center;
            font-size: 18px;
            font-weight: bold;
        }
        
        .result-table-container {
            background-color: #e9f7ef;
            padding: 15px;
            border-radius: 4px;
        }
        
        .amount-number {
            color: #6b13a9;
        }
        .section {
            border: 1px solid #eee;
            border-radius: 5px;
            padding: 15px;
            margin-bottom: 20px;
        }
        
        /* 基础费用设置区域特殊背景 */
        .section:has(#rent) {
            background-color: #f8f9fa;
        }
        
        /* 用量设置区域特殊背景 */
        .section:has(#coldWaterUsage) {
            background-color: #f0f8ff;
        }
        
        .section-title {
            margin-top: 0;
            color: #555;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px;
        }
        .input-locked {
            background-color: #e9ecef;
            pointer-events: none;
        }
        .total-amount {
            margin-top: 10px; 
            font-size: 20px; 
        }
        .total-amount-text {
            color: blue;
        }
        .total-amount-number {
            color: red;
        }
        
        /* 用量输入区域样式 */
        .usage-inputs {
            display: flex;
            align-items: center;
            gap: 5px;
            flex-wrap: nowrap;
        }
        
        .usage-inputs input {
            flex: 1;
            min-width: 0;
        }
        
        .usage-inputs input:first-child {
            flex: 1;
        }
        
        .usage-inputs input:last-child {
            flex: 1;
        }
        
        .usage-inputs span {
            font-weight: bold;
            flex-shrink: 0;
        }
        
        /* 错误提示信息样式 */
        .error-message {
            color: red;
            font-size: 14px;
            margin-top: 5px;
        }
        
        /* 提示语样式 */
        .placeholder {
            position: absolute;
            left: 10px;
            top: 70%;
            transform: translateY(-50%);
            color: #999;
            pointer-events: none;
        }
        
        /* 并排显示基础费用和用量设置 */
        .settings-container {
            display: flex;
            gap: 20px;
            margin-bottom: 20px;
        }
        
        .settings-column {
            flex: 1;
        }
        
        /* 表格样式 */
        table {
            width: 100%;
            border-collapse: collapse;
            margin-top: 20px;
        }

        table, th, td {
            border: 1px solid #ddd;
        }

        th, td {
            padding: 8px;
            text-align: center;
        }

        th {
            background-color: #f2f2f2;
            font-weight: bold;
        }
        
        th[colspan="6"] {
            text-align: center;
            background-color: #dbe9f0;
            font-size: 18px;
        }
        
        .date-header {
            text-align: right;
            font-weight: normal;
        }
        
        tr:nth-child(even) {
            background-color: #f9f9f9;
        }

        tr:hover {
            background-color: #e6e6e6;
        }

        td strong {
            color: red;
        }
        
        /* 响应式设计 */
        @media (max-width: 768px) {
            body {
                padding: 10px;
            }
            .container {
                padding: 15px;
            }
            h1 {
                font-size: 24px;
            }
            .section {
                padding: 10px;
            }
            .section-title {
                font-size: 18px;
            }
            .toggle-btn {
                padding: 5px 8px;
                font-size: 12px;
            }
            input[type="number"] {
                padding: 6px;
                font-size: 16px;
                -moz-appearance: textfield;
                -webkit-appearance: none;
                appearance: none;
            }
            
            input[type="text"] {
                padding: 6px;
                font-size: 16px;
            }
            
            .building-name-input {
                padding: 6px;
                font-size: 16px;
            }
            
            .billing-date-input {
                padding: 6px;
                font-size: 16px;
            }
            
            .room-number-input {
                padding: 6px;
                font-size: 16px;
            }
            
            button {
                padding: 12px;
                font-size: 16px;
            }
            .result {
                padding: 10px;
                font-size: 16px;
            }
            .total-amount {
                font-size: 18px;
            }
            .usage-inputs {
                display: flex;
                align-items: center;
                gap: 3px;
                flex-wrap: nowrap;
            }
            
            .usage-inputs input {
                flex: 1;
                min-width: 0;
                padding: 5px;
                font-size: 14px;
            }
            .required {
                color: red;
                color: #ff0000;
                margin-right: 5px;
            }
            .amount-number {
                color: #6b13a9;
            }
            
            /* 手机端表格样式调整 */
            table {
                font-size: 14px;
                margin-top: 15px;
            }
            
            th, td {
                padding: 6px 4px;
            }
            
            th[colspan="6"] {
                font-size: 16px;
            }
            
            .result-table-container {
                padding: 10px 5px;
            }
        }
        
        @media (max-width: 480px) {
            body {
                padding: 5px;
            }
            .container {
                padding: 10px;
            }
            h1 {
                font-size: 20px;
            }
            .section-title {
                font-size: 16px;
            }
            label {
                font-size: 14px;
            }
            input[type="number"] {
                padding: 5px;
                font-size: 16px;
                -moz-appearance: textfield;
                -webkit-appearance: none;
                appearance: none;
            }
            
            input[type="text"] {
                padding: 5px;
                font-size: 16px;
            }
            
            .building-name-input {
                padding: 5px;
                font-size: 16px;
            }
            
            .billing-date-input {
                padding: 5px;
                font-size: 16px;
            }
            
            .room-number-input {
                padding: 5px;
                font-size: 16px;
            }
            
            button {
                padding: 10px;
                font-size: 14px;
            }
            .result {
                font-size: 14px;
            }
            .total-amount {
                font-size: 16px;
            }
            
            /* 在小屏幕上调整并排显示 */
            .settings-container {
                gap: 10px;
            }
            
            .settings-column {
                min-width: calc(50% - 5px);
            }
            
            .usage-inputs {
                display: flex;
                align-items: center;
                gap: 2px;
                flex-wrap: nowrap;
            }
            
            .usage-inputs input {
                flex: 1;
                min-width: 0;
                padding: 4px;
                font-size: 14px;
            }
            
            .usage-inputs span {
                font-weight: bold;
                font-size: 14px;
                flex-shrink: 0;
            }
            .required {
                color: red;
                color: #ff0000;
                margin-right: 5px;
            }
            .amount-number {
                color: #6b13a9;
            }
            
            /* 小屏幕手机端表格样式调整 */
            table {
                font-size: 12px;
                margin-top: 10px;
                table-layout: fixed;
                word-break: break-word;
            }
            
            th, td {
                padding: 4px 2px;
            }
            
            th[colspan="6"] {
                font-size: 14px;
            }
            
            .result-table-container {
                padding: 8px 3px;
            }
            
            .date-header {
                font-size: 12px;
            }
        }