/* 基础样式 */
        :root {
            --primary: #165DFF;
            --primary-light: #3d7fff;
            --primary-dark: #0E42D2;
            --secondary: #36CFC9;
            --secondary-light: #4ad9d3;
            --secondary-dark: #2bb8b3;
            --accent: #722ED1;
            --accent-light: #8a4fe3;
            --accent-dark: #6725c5;
            --neutral: #F5F7FA;
            --neutral-light: #fafbfc;
            --neutral-dark: #4E5969;
            --white: #ffffff;
            --text-primary: #1a202c;
            --text-secondary: #4a5568;
            --text-light: #718096;
            --border-color: #e2e8f0;
            --border-light: #f1f5f9;
            --shadow: 0 10px 30px -5px rgba(0, 0, 0, 0.05), 0 4px 6px -2px rgba(0, 0, 0, 0.03);
            --shadow-hover: 0 20px 40px -5px rgba(0, 0, 0, 0.1), 0 8px 12px -4px rgba(0, 0, 0, 0.05);
            --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.05), 0 1px 2px rgba(0, 0, 0, 0.1);
            --radius: 12px;
            --radius-sm: 8px;
            --transition: all 0.3s ease;
            --transition-fast: all 0.15s ease;
        }

        .dark-mode {
            --primary: #3d7fff;
            --primary-light: #5d95ff;
            --primary-dark: #2b5fc9;
            --secondary: #4ad9d3;
            --secondary-light: #6ae4de;
            --secondary-dark: #3ac4be;
            --accent: #8a4fe3;
            --accent-light: #a36fee;
            --accent-dark: #7939d7;
            --neutral: #2d3748;
            --neutral-light: #4a5568;
            --neutral-dark: #e2e8f0;
            --white: #2d3748;
            --text-primary: #e2e8f0;
            --text-secondary: #cbd5e0;
            --text-light: #a0aec0;
            --border-color: #4a5568;
            --border-light: #2d3748;
            --shadow: 0 10px 30px -5px rgba(0, 0, 0, 0.2), 0 4px 6px -2px rgba(0, 0, 0, 0.1);
            --shadow-hover: 0 20px 40px -5px rgba(0, 0, 0, 0.3), 0 8px 12px -4px rgba(0, 0, 0, 0.15);
            --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.2), 0 1px 2px rgba(0, 0, 0, 0.3);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Inter', 'system-ui', 'sans-serif';
            background-color: var(--neutral);
            color: var(--text-primary);
            line-height: 1.6;
            min-height: 100vh;
            transition: var(--transition);
            background-image: 
                radial-gradient(circle at 15% 50%, rgba(22, 93, 255, 0.03) 0%, transparent 25%),
                radial-gradient(circle at 85% 30%, rgba(54, 207, 201, 0.03) 0%, transparent 25%);
        }

        /* 通用组件样式 */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 16px;
        }

        .card {
            background-color: var(--white);
            border-radius: var(--radius);
            box-shadow: var(--shadow-card);
            padding: 24px;
            transition: var(--transition);
            border: 1px solid var(--border-light);
            position: relative;
            overflow: hidden;
        }

        .card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary) 0%, var(--secondary) 50%, var(--accent) 100%);
            opacity: 0;
            transition: var(--transition);
        }

        .card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-5px);
        }

        .card:hover::before {
            opacity: 1;
        }

        .card-primary {
            border-top: 4px solid var(--primary);
        }

        .card-secondary {
            border-top: 4px solid var(--secondary);
        }

        .card-accent {
            border-top: 4px solid var(--accent);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 20px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
            gap: 8px;
            font-size: 14px;
            position: relative;
            overflow: hidden;
        }

        .btn::after {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            width: 5px;
            height: 5px;
            background: rgba(255, 255, 255, 0.5);
            opacity: 0;
            border-radius: 100%;
            transform: scale(1, 1) translate(-50%);
            transform-origin: 50% 50%;
        }

        .btn:focus:not(:active)::after {
            animation: ripple 1s ease-out;
        }

        @keyframes ripple {
            0% {
                transform: scale(0, 0);
                opacity: 0.5;
            }
            100% {
                transform: scale(20, 20);
                opacity: 0;
            }
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: white;
            box-shadow: 0 4px 12px rgba(22, 93, 255, 0.2);
        }

        .btn-primary:hover {
            background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 100%);
            box-shadow: 0 6px 16px rgba(22, 93, 255, 0.3);
            transform: translateY(-2px);
        }

        .btn-secondary {
            background: linear-gradient(135deg, var(--secondary) 0%, var(--secondary-dark) 100%);
            color: white;
            box-shadow: 0 4px 12px rgba(54, 207, 201, 0.2);
        }

        .btn-secondary:hover {
            background: linear-gradient(135deg, var(--secondary-light) 0%, var(--secondary) 100%);
            box-shadow: 0 6px 16px rgba(54, 207, 201, 0.3);
            transform: translateY(-2px);
        }

        .btn-accent {
            background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
            color: white;
            box-shadow: 0 4px 12px rgba(114, 46, 209, 0.2);
        }

        .btn-accent:hover {
            background: linear-gradient(135deg, var(--accent-light) 0%, var(--accent) 100%);
            box-shadow: 0 6px 16px rgba(114, 46, 209, 0.3);
            transform: translateY(-2px);
        }

        .btn-outline {
            background-color: transparent;
            color: var(--text-primary);
            border: 1px solid var(--border-color);
        }

        .btn-outline:hover {
            background-color: var(--neutral);
            border-color: var(--primary);
            color: var(--primary);
        }

        .form-group {
            margin-bottom: 20px;
        }

        .form-label {
            display: block;
            font-size: 14px;
            font-weight: 500;
            margin-bottom: 8px;
            color: var(--text-secondary);
        }

        .form-input, .form-select {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            background-color: var(--white);
            color: var(--text-primary);
            font-size: 14px;
            transition: var(--transition);
        }

        .form-input:focus, .form-select:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(22, 93, 255, 0.1);
        }

        .form-radio-group {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 8px;
        }

        .form-radio-label {
            display: flex;
            align-items: center;
            padding: 12px 16px;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: var(--transition);
            background-color: var(--white);
        }

        .form-radio-label:hover {
            background-color: var(--neutral);
            border-color: var(--primary);
        }

        .form-radio-label input {
            margin-right: 8px;
        }

        .form-radio-label.active {
            background-color: rgba(22, 93, 255, 0.1);
            border-color: var(--primary);
            color: var(--primary);
        }

        .icon-circle {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-right: 12px;
            transition: var(--transition);
        }

        .icon-circle-primary {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: white;
            box-shadow: 0 4px 12px rgba(22, 93, 255, 0.3);
        }

        .icon-circle-secondary {
            background: linear-gradient(135deg, var(--secondary) 0%, var(--secondary-dark) 100%);
            color: white;
            box-shadow: 0 4px 12px rgba(54, 207, 201, 0.3);
        }

        .icon-circle-accent {
            background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
            color: white;
            box-shadow: 0 4px 12px rgba(114, 46, 209, 0.3);
        }

        .section-title {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 20px;
            display: flex;
            align-items: center;
        }

        .result-value {
            font-size: 32px;
            font-weight: 700;
            color: var(--primary);
            transition: var(--transition);
        }

        .result-unit {
            font-size: 16px;
            color: var(--text-secondary);
            margin-left: 4px;
        }

        /* 布局样式 */
        .notification-bar {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: white;
            text-align: center;
            padding: 8px 0;
            font-size: 14px;
            position: relative;
            overflow: hidden;
        }

        .notification-bar::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.1) 50%, transparent 100%);
            animation: shimmer 3s infinite;
        }

        @keyframes shimmer {
            0% { transform: translateX(-100%); }
            100% { transform: translateX(100%); }
        }

        .header {
            background-color: var(--white);
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
            position: sticky;
            top: 0;
            z-index: 100;
            transition: var(--transition);
        }

        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 16px 0;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .logo-icon {
            width: 40px;
            height: 40px;
            border-radius: 8px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            box-shadow: 0 4px 12px rgba(22, 93, 255, 0.3);
        }

        .logo-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
        }

        .nav {
            display: flex;
            align-items: center;
            gap: 32px;
        }

        .nav-link {
            color: var(--text-primary);
            text-decoration: none;
            font-weight: 500;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .nav-link:hover {
            color: var(--primary);
        }

        .theme-toggle {
            padding: 8px;
            border-radius: 50%;
            background: none;
            border: none;
            cursor: pointer;
            color: var(--text-primary);
            transition: var(--transition);
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
        }

        .theme-toggle:hover {
            background-color: var(--neutral);
        }

        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-primary);
            font-size: 20px;
            cursor: pointer;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
        }

        .mobile-menu-toggle:hover {
            background-color: var(--neutral);
        }

        .mobile-menu {
            display: none;
            background-color: var(--white);
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            position: absolute;
            width: 100%;
            border-top: 1px solid var(--border-color);
                margin: 0 -16px;
                padding: 0 16px;
        }

        .mobile-menu-content {
            padding: 16px 0;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        /* 计算模式切换 */
        .mode-switcher {
            display: flex;
            background-color: var(--neutral);
            border-radius: var(--radius-sm);
            padding: 4px;
            gap: 4px;
            box-shadow: var(--shadow-card);
        }

        .mode-btn {
            flex: 1;
            padding: 10px 24px;
            border-radius: 6px;
            background: none;
            border: none;
            font-weight: 500;
            cursor: pointer;
            transition: var(--transition);
            position: relative;
        }

        .mode-btn.active {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: white;
            box-shadow: 0 2px 8px rgba(22, 93, 255, 0.3);
        }

        /* 计算器卡片布局 */
        .calculators-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-bottom: 40px;
        }

        /* 批量计算区域 */
        .import-area {
            border: 2px dashed var(--border-color);
            border-radius: var(--radius);
            padding: 32px;
            text-align: center;
            margin-bottom: 20px;
            transition: var(--transition);
            background-color: var(--neutral-light);
        }

        .import-area:hover {
            border-color: var(--primary);
            background-color: rgba(22, 93, 255, 0.03);
        }

        .import-area.drag-over {
            border-color: var(--primary);
            background-color: rgba(22, 93, 255, 0.08);
        }

        .import-icon {
            font-size: 40px;
            color: var(--primary);
            margin-bottom: 16px;
        }

        .import-title {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .import-description {
            color: var(--text-secondary);
            margin-bottom: 20px;
        }

        .import-actions {
            display: flex;
            gap: 12px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* 表格样式 */
        .table-container {
            overflow-x: auto;
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            max-height: 400px;
            background-color: var(--white);
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
        }

        .data-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 14px;
        }

        .data-table th,
        .data-table td {
            padding: 12px 8px;
            border: 1px solid var(--border-color);
            text-align: left;
        }

        .data-table th {
            background-color: var(--neutral);
            font-weight: 600;
            position: sticky;
            top: 0;
            z-index: 10;
        }

        .data-table tbody tr:nth-child(even) {
            background-color: var(--neutral);
        }

        .data-table tbody tr:hover {
            background-color: rgba(0, 0, 0, 0.03);
        }

        /* 通知提示 */
        .toast {
            position: fixed;
            bottom: 24px;
            right: 24px;
            padding: 12px 20px;
            border-radius: var(--radius);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
            display: flex;
            align-items: center;
            transform: translateY(80px);
            opacity: 0;
            transition: var(--transition);
            z-index: 1000;
            max-width: 400px;
        }

        .toast.show {
            transform: translateY(0);
            opacity: 1;
        }

        .toast-success {
            background-color: #d1fae5;
            color: #065f46;
            border: 1px solid #a7f3d0;
        }

        .toast-warning {
            background-color: #fef3c7;
            color: #92400e;
            border: 1px solid #fde68a;
        }

        .toast-error {
            background-color: #fee2e2;
            color: #991b1b;
            border: 1px solid #fecaca;
        }

        .toast-info {
            background-color: #dbeafe;
            color: #1e40af;
            border: 1px solid #bfdbfe;
        }

        /* 加载状态 */
        .loading-overlay {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-color: rgba(0, 0, 0, 0.5);
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 1000;
            display: none;
        }

        .loading-content {
            background-color: var(--white);
            border-radius: var(--radius);
            padding: 24px;
            display: flex;
            align-items: center;
            gap: 12px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
        }

        .loading-spinner {
            animation: spin 1s linear infinite;
            color: var(--primary);
        }

        @keyframes spin {
            from { transform: rotate(0deg); }
            to { transform: rotate(360deg); }
        }

        /* 响应式设计 */
        @media (max-width: 1024px) {
            .calculators-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .nav {
                display: none;
            }
            
            .mobile-menu-toggle {
                display: flex;
            }
            
            .calculators-grid {
                grid-template-columns: 1fr;
            }
            
            .mode-switcher {
                flex-direction: column;
            }
            
            .import-actions {
                flex-direction: column;
            }
        }

        /* 隐藏/显示控制 */
        .hidden {
            display: none !important;
        }

        /* 导航显示控制 */
        .dh_hidden {
            display:block;
        }
        /* 结果区域 */
        .result-section {
            border-top: 1px solid var(--border-color);
            padding-top: 20px;
            margin-top: 20px;
        }

        .result-label {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            margin-bottom: 8px;
        }

        .result-display {
            display: flex;
            align-items: flex-end;
        }

        /* 深色模式表格样式 */
        .dark-mode .data-table th {
            background-color: var(--neutral);
            color: var(--text-primary);
            border-color: var(--border-color);
        }
        
        .dark-mode .data-table td {
            border-color: var(--border-color);
            color: var(--text-primary);
        }
        
        .dark-mode .data-table tbody tr:nth-child(even) {
            background-color: var(--neutral);
        }
        
        .dark-mode .data-table tbody tr:hover {
            background-color: rgba(255, 255, 255, 0.05);
        }

        /* 新增样式：步骤指示器 */
        .steps {
            display: flex;
            margin-bottom: 24px;
            position: relative;
        }

        .steps::before {
            content: '';
            position: absolute;
            top: 20px;
            left: 0;
            right: 0;
            height: 2px;
            background-color: var(--border-color);
            z-index: 1;
        }

        .step {
            display: flex;
            flex-direction: column;
            align-items: center;
            flex: 1;
            position: relative;
            z-index: 2;
        }

        .step-number {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background-color: var(--neutral);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 600;
            margin-bottom: 8px;
            border: 2px solid var(--border-color);
            transition: var(--transition);
        }

        .step.active .step-number {
            background-color: var(--primary);
            color: white;
            border-color: var(--primary);
        }

        .step.completed .step-number {
            background-color: var(--secondary);
            color: white;
            border-color: var(--secondary);
        }

        .step-label {
            font-size: 14px;
            color: var(--text-secondary);
            text-align: center;
        }

        .step.active .step-label {
            color: var(--primary);
            font-weight: 500;
        }

        /* 新增样式：进度条 */
        .progress-bar {
            height: 6px;
            background-color: var(--neutral);
            border-radius: 3px;
            overflow: hidden;
            margin-bottom: 20px;
        }

        .progress-fill {
            height: 100%;
            background: linear-gradient(90deg, var(--primary) 0%, var(--secondary) 100%);
            border-radius: 3px;
            transition: width 0.5s ease;
        }

        /* 新增样式：标签页 */
        .tabs {
            display: flex;
            border-bottom: 1px solid var(--border-color);
            margin-bottom: 20px;
        }

        .tab {
            padding: 12px 20px;
            background: none;
            border: none;
            font-weight: 500;
            color: var(--text-secondary);
            cursor: pointer;
            transition: var(--transition);
            position: relative;
        }

        .tab.active {
            color: var(--primary);
        }

        .tab.active::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 0;
            right: 0;
            height: 2px;
            background-color: var(--primary);
        }

        .tab:hover {
            color: var(--primary);
        }

        /* 新增样式：徽章 */
        .badge {
            display: inline-block;
            padding: 4px 8px;
            background-color: var(--neutral);
            color: var(--text-secondary);
            border-radius: 4px;
            font-size: 12px;
            font-weight: 500;
        }

        .badge-primary {
            background-color: rgba(22, 93, 255, 0.1);
            color: var(--primary);
        }

        .badge-secondary {
            background-color: rgba(54, 207, 201, 0.1);
            color: var(--secondary);
        }

        .badge-accent {
            background-color: rgba(114, 46, 209, 0.1);
            color: var(--accent);
        }

        /* 新增样式：工具提示 */
        .tooltip {
            position: relative;
            display: inline-block;
        }

        .tooltip .tooltip-text {
            visibility: hidden;
            width: 200px;
            background-color: var(--text-primary);
            color: var(--white);
            text-align: center;
            border-radius: 6px;
            padding: 8px;
            position: absolute;
            z-index: 1;
            bottom: 125%;
            left: 50%;
            transform: translateX(-50%);
            opacity: 0;
            transition: opacity 0.3s;
            font-size: 12px;
            font-weight: normal;
        }

        .tooltip .tooltip-text::after {
            content: "";
            position: absolute;
            top: 100%;
            left: 50%;
            margin-left: -5px;
            border-width: 5px;
            border-style: solid;
            border-color: var(--text-primary) transparent transparent transparent;
        }

        .tooltip:hover .tooltip-text {
            visibility: visible;
            opacity: 1;
        }

        /* 新增样式：动画效果 */
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(10px); }
            to { opacity: 1; transform: translateY(0); }
        }

        .fade-in {
            animation: fadeIn 0.5s ease forwards;
        }

        @keyframes pulse {
            0% { transform: scale(1); }
            50% { transform: scale(1.05); }
            100% { transform: scale(1); }
        }

        .pulse {
            animation: pulse 0.5s ease;
        }

        /* 新增样式：统计卡片 */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
            margin-bottom: 24px;
        }

        .stat-card {
            background-color: var(--white);
            border-radius: var(--radius);
            padding: 16px;
            box-shadow: var(--shadow-card);
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
        }

        .stat-value {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 4px;
        }

        .stat-label {
            font-size: 14px;
            color: var(--text-secondary);
        }

        /* 新增样式：折叠面板 */
        .collapse {
            margin-bottom: 16px;
        }

        .collapse-header {
            padding: 16px;
            background-color: var(--neutral);
            border-radius: var(--radius);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: var(--transition);
        }

        .collapse-header:hover {
            background-color: var(--neutral-light);
        }

        .collapse-content {
            padding: 16px;
            background-color: var(--white);
            border-radius: 0 0 var(--radius) var(--radius);
            display: none;
        }

        .collapse.active .collapse-content {
            display: block;
        }

        /* 新增样式：搜索框 */
        .search-box {
            position: relative;
            margin-bottom: 20px;
        }

        .search-input {
            width: 100%;
            padding: 12px 16px 12px 40px;
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            background-color: var(--white);
            color: var(--text-primary);
            font-size: 14px;
            transition: var(--transition);
        }

        .search-input:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(22, 93, 255, 0.1);
        }

        .search-icon {
            position: absolute;
            left: 12px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-light);
        }