:root {
            --primary-color: #2c7da0;
            --secondary-color: #a9d6e5;
            --accent-color: #01497c;
            --light-gray: #f8f9fa;
            --border-color: #eaeaea;
            --text-color: #333;
            --text-muted: #6c757d;
            --header-bg: #f0f4f8;
            --healthy-color: #28a745;
            --cutting-color: #ffc107;
            --bulking-color: #dc3545;
        }
        
      
        
        .bmr-result {
            text-align: center;
            padding: 1.5rem;
            border-radius: 8px;
            margin-bottom: 1.5rem;
            background-color: #f8f9fa;
            border: 1px solid #eaeaea;
        }
        
        .bmr-value {
            font-size: 3.5rem;
            font-weight: 700;
            margin: 0.5rem 0;
            color: var(--primary-color);
        }
        
        .bmr-description {
            font-size: 1.1rem;
            margin-bottom: 1rem;
        }
        
        .tdee-result {
            display: flex;
            justify-content: space-around;
            margin: 1.5rem 0;
            text-align: center;
        }
        
        .tdee-item {
            flex: 1;
            padding: 1rem;
        }
        
        .tdee-value {
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--primary-color);
        }
        
        .tdee-label {
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        
        .activity-levels {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin-bottom: 1.5rem;
        }
        
        .activity-card {
            flex: 1;
            min-width: 150px;
            padding: 1.5rem;
            border: 2px solid #ddd;
            border-radius: 8px;
            background: white;
            text-align: center;
            cursor: pointer;
            transition: all 0.3s;
        }
        
        .activity-card:hover {
            border-color: var(--primary-color);
        }
        
        .activity-card.active {
            border-color: var(--primary-color);
            background-color: rgba(44, 125, 160, 0.1);
        }
        
        .activity-icon {
            font-size: 2rem;
            color: var(--primary-color);
            margin-bottom: 0.5rem;
        }
        
        .activity-name {
            font-weight: 500;
            margin-bottom: 0.25rem;
        }
        
        .activity-desc {
            color: var(--text-muted);
            font-size: 0.9rem;
        }
        
        .goal-options {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin-bottom: 1.5rem;
        }
        
        .goal-card {
            flex: 1;
            min-width: 150px;
            padding: 1.5rem;
            border: 2px solid #ddd;
            border-radius: 8px;
            background: white;
            text-align: center;
            cursor: pointer;
            transition: all 0.3s;
        }
        
        .goal-card:hover {
            border-color: var(--primary-color);
        }
        
        .goal-card.active {
            border-color: var(--primary-color);
            background-color: rgba(44, 125, 160, 0.1);
        }
        
        .goal-icon {
            font-size: 2rem;
            margin-bottom: 0.5rem;
        }
        
        .goal-maintain .goal-icon {
            color: var(--healthy-color);
        }
        
        .goal-cut .goal-icon {
            color: var(--cutting-color);
        }
        
        .goal-bulk .goal-icon {
            color: var(--bulking-color);
        }
        
        .goal-name {
            font-weight: 500;
            margin-bottom: 0.25rem;
        }
        
        .goal-desc {
            color: var(--text-muted);
            font-size: 0.9rem;
        }
        
        .unit-toggle {
            display: flex;
            margin-bottom: 1rem;
            border: 1px solid #ddd;
            border-radius: 6px;
            overflow: hidden;
        }
        
        .unit-btn {
            flex: 1;
            padding: 0.75rem;
            background: white;
            border: none;
            cursor: pointer;
            text-align: center;
            font-weight: 500;
            transition: all 0.3s;
        }
        
        .unit-btn.active {
            background-color: var(--primary-color);
            color: white;
        }
        
        .unit-btn:not(:last-child) {
            border-right: 1px solid #ddd;
        }
        
        .input-group-unit {
            position: relative;
        }
        
        .unit-label {
            position: absolute;
            right: 10px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-muted);
        }
        
        .gender-selection {
            display: flex;
            gap: 1rem;
            margin-bottom: 1.5rem;
        }
        
        .gender-btn {
            flex: 1;
            padding: 1rem;
            border: 2px solid #ddd;
            border-radius: 8px;
            background: white;
            text-align: center;
            cursor: pointer;
            transition: all 0.3s;
        }
        
        .gender-btn:hover {
            border-color: var(--primary-color);
        }
        
        .gender-btn.active {
            border-color: var(--primary-color);
            background-color: rgba(44, 125, 160, 0.1);
        }
        
        .gender-icon {
            font-size: 2rem;
            margin-bottom: 0.5rem;
        }
        
        .gender-label {
            font-weight: 500;
        }
        
        .age-input {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        
        .age-input input {
            max-width: 100px;
        }
        
     
        /* 新增样式 */
        .info-section {
            background-color: rgba(44, 125, 160, 0.05);
            border-radius: 8px;
            padding: 1.5rem;
            margin: 1.5rem 0;
            border-left: 3px solid var(--primary-color);
        }
        
        .info-title {
            font-weight: 600;
            margin-bottom: 1rem;
            color: var(--primary-color);
        }
        
        .image-card {
            border-radius: 8px;
            overflow: hidden;
            margin: 1.5rem 0;
            box-shadow: 0 4px 8px rgba(0,0,0,0.1);
            border: 1px solid var(--border-color);
        }
        
        .image-card img {
            width: 100%;
            height: 250px;
            object-fit: cover;
        }
        
        .image-card-content {
            padding: 1rem;
            background: white;
        }
        
        .image-card-title {
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: var(--primary-color);
        }
        
        .image-card-desc {
            color: var(--text-muted);
            font-size: 0.9rem;
        }
        
        .image-attribution {
            font-size: 0.7rem;
            color: var(--text-muted);
            text-align: right;
            padding: 0.5rem;
            background-color: var(--light-gray);
        }
        
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            margin: 1.5rem 0;
        }
        
        .feature-card {
            background-color: white;
            border-radius: 8px;
            padding: 1.5rem;
            border: 1px solid var(--border-color);
            box-shadow: 0 2px 5px rgba(0,0,0,0.05);
            transition: all 0.3s;
        }
        
        .feature-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        
        .feature-icon {
            font-size: 2rem;
            color: var(--primary-color);
            margin-bottom: 1rem;
        }
        
        .feature-title {
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: var(--primary-color);
        }
        
        .feature-desc {
            color: var(--text-muted);
        }
        
        .testimonial-section {
            background-color: rgba(169, 214, 229, 0.2);
            border-radius: 8px;
            padding: 1.5rem;
            margin: 1.5rem 0;
            border-left: 3px solid var(--primary-color);
        }
        
        .testimonial {
            display: flex;
            align-items: center;
            margin-bottom: 1.5rem;
        }
        
        .testimonial:last-child {
            margin-bottom: 0;
        }
        
        .testimonial-avatar {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            object-fit: cover;
            margin-right: 1rem;
            border: 3px solid var(--primary-color);
        }
        
        .testimonial-content {
            flex: 1;
        }
        
        .testimonial-text {
            font-style: italic;
            margin-bottom: 0.5rem;
        }
        
        .testimonial-author {
            font-weight: 600;
            color: var(--primary-color);
        }
        
        .testimonial-role {
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
            gap: 1rem;
            margin: 1.5rem 0;
        }
        
        .stat-card {
            background-color: white;
            border-radius: 8px;
            padding: 1rem;
            text-align: center;
            border: 1px solid var(--border-color);
        }
        
        .stat-value {
            font-size: 2rem;
            font-weight: 700;
            color: var(--primary-color);
            margin-bottom: 0.5rem;
        }
        
        .stat-label {
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        
        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
        }
        
        .comparison-table th, .comparison-table td {
            padding: 0.75rem;
            text-align: left;
            border-bottom: 1px solid var(--border-color);
        }
        
        .comparison-table th {
            background-color: var(--light-gray);
            font-weight: 600;
        }
        
        .comparison-table tr:hover {
            background-color: rgba(44, 125, 160, 0.05);
        }
        
        .tip-card {
            background-color: white;
            border-radius: 8px;
            padding: 1.5rem;
            margin: 1.5rem 0;
            border: 1px solid var(--border-color);
            display: flex;
            align-items: flex-start;
        }
        
        .tip-icon {
            font-size: 1.5rem;
            color: var(--primary-color);
            margin-right: 1rem;
            flex-shrink: 0;
        }
        
        .tip-content {
            flex: 1;
        }
        
        .tip-title {
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: var(--primary-color);
        }
        
        .tip-desc {
            color: var(--text-muted);
        }
        
        .metabolism-chart {
            height: 300px;
            background-color: #f8f9fa;
            border-radius: 8px;
            padding: 1rem;
            margin: 1.5rem 0;
            position: relative;
        }
        
        .chart-bar {
            position: absolute;
            bottom: 0;
            width: 30px;
            background-color: var(--primary-color);
            border-radius: 4px 4px 0 0;
            transition: height 0.5s ease;
        }
        
        .chart-label {
            position: absolute;
            bottom: -25px;
            text-align: center;
            font-size: 0.8rem;
            width: 30px;
        }
        
        .chart-title {
            position: absolute;
            top: -25px;
            text-align: center;
            font-size: 0.9rem;
            font-weight: 500;
            width: 30px;
        }
        
        .formula-section {
            background-color: rgba(40, 167, 69, 0.05);
            border-radius: 8px;
            padding: 1.5rem;
            margin: 1.5rem 0;
            border-left: 3px solid var(--healthy-color);
        }
        
        .formula-title {
            font-weight: 600;
            margin-bottom: 1rem;
            color: var(--healthy-color);
        }
        
        .formula-equation {
            font-family: 'Courier New', monospace;
            font-size: 1.2rem;
            background-color: white;
            padding: 1rem;
            border-radius: 6px;
            margin: 1rem 0;
            border: 1px solid var(--border-color);
        }
        
        @media (max-width: 768px) {
            .feature-grid {
                grid-template-columns: 1fr;
            }
            
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .testimonial {
                flex-direction: column;
                text-align: center;
            }
            
            .testimonial-avatar {
                margin-right: 0;
                margin-bottom: 1rem;
            }
        }