:root {
            /* 暖色调变量 */
            --warm-primary: #8B5A2B;
            --warm-secondary: #556B2F;
            --warm-accent: #DAA520;
            --warm-light: #F8F4E3;
            --warm-dark: #3A2718;
            --warm-gray: #E5E1D1;
            
            /* 冷色调变量 */
            --cool-primary: #2A4365;
            --cool-secondary: #4A5568;
            --cool-accent: #718096;
            --cool-light: #EDF2F7;
            --cool-dark: #1A202C;
            --cool-gray: #E2E8F0;
            
            --transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Poppins', sans-serif;
            line-height: 1.6;
            overflow-x: hidden;
            transition: background-color 0.5s ease;
        }
        
        /* 暖色调模式基础样式 */
        .color-mode-warm body {
            color: var(--warm-dark);
            background-color: #fcfaf5;
        }
        
        /* 冷色调模式基础样式 */
        .color-mode-cool body {
            color: var(--cool-dark);
            background-color: #f8fafc;
        }
        
        .container {
            max-width: 900px;
            margin: 0 auto;
            padding: 0 15px;
        }
        
        /* 品牌故事部分样式 */
        .brand-story {
            padding: 80px 0;
            position: relative;
            overflow: hidden;
            transition: all 0.5s ease;
        }
        
        .color-mode-cool .brand-story {
            background-color: var(--cool-light);
        }
        
        .section-header {
            text-align: center;
            max-width: 700px;
            margin: 0 auto 60px;
            position: relative;
            z-index: 2;
        }
        
        .section-title {
            font-family: 'Playfair Display', serif;
            font-size: 2.8rem;
            font-weight: 700;
            margin-bottom: 20px;
            position: relative;
            display: inline-block;
            line-height: 1.3;
            transition: color 0.5s ease;
        }
        
        .color-mode-warm .section-title {
            color: var(--warm-dark);
        }
        
        .color-mode-cool .section-title {
            color: var(--cool-dark);
        }
        
        .section-title::after {
            content: '';
            position: absolute;
            bottom: -12px;
            left: 50%;
            transform: translateX(-50%);
            width: 100px;
            height: 3px;
            border-radius: 2px;
            transition: all 0.5s ease;
        }
        
        .color-mode-warm .section-title::after {
            background: linear-gradient(90deg, var(--warm-primary), var(--warm-secondary));
        }
        
        .color-mode-cool .section-title::after {
            background: linear-gradient(90deg, var(--cool-primary), var(--cool-secondary));
        }
        
        .section-subtitle {
            font-size: 1.05rem;
            margin-top: 25px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
            line-height: 1.7;
            transition: color 0.5s ease;
        }
        
        .color-mode-warm .section-subtitle {
            color: #6c6c6c;
        }
        
        .color-mode-cool .section-subtitle {
            color: #5D6970;
        }
        
        .story-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 30px;
            position: relative;
        }
        
        .story-card {
            background: white;
            border-radius: 12px;
            overflow: hidden;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            position: relative;
            padding: 30px;
            opacity: 0;
            transform: translateY(20px);
            transition: all 0.6s ease;
        }
        
        .color-mode-warm .story-card {
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
        }
        
        .color-mode-cool .story-card {
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
        }
        
        .story-card.visible {
            opacity: 1;
            transform: translateY(0);
        }
        
        .story-card:hover {
            transform: translateY(-8px);
        }
        
        .color-mode-warm .story-card:hover {
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
        }
        
        .color-mode-cool .story-card:hover {
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.12);
        }
        
        .card-header {
            position: relative;
            margin-bottom: 22px;
            display: flex;
            align-items: center;
        }
        
        .card-icon {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-right: 18px;
            transition: var(--transition);
        }
        
        .color-mode-warm .card-icon {
            background: linear-gradient(135deg, rgba(139, 90, 43, 0.1), rgba(85, 107, 47, 0.1));
        }
        
        .color-mode-cool .card-icon {
            background: linear-gradient(135deg, rgba(42, 67, 101, 0.1), rgba(74, 85, 104, 0.1));
        }
        
        .story-card:hover .card-icon {
            transform: scale(1.05);
        }
        
        .color-mode-warm .story-card:hover .card-icon {
            background: linear-gradient(135deg, var(--warm-primary), var(--warm-secondary));
        }
        
        .color-mode-cool .story-card:hover .card-icon {
            background: linear-gradient(135deg, var(--cool-primary), var(--cool-secondary));
        }
        
        .card-icon i {
            font-size: 24px;
            transition: var(--transition);
        }
        
        .color-mode-warm .card-icon i {
            color: var(--warm-primary);
        }
        
        .color-mode-cool .card-icon i {
            color: var(--cool-primary);
        }
        
        .story-card:hover .card-icon i {
            color: white;
            transform: scale(1.1);
        }
        
        .card-title {
            font-family: 'Playfair Display', serif;
            font-size: 1.6rem;
            font-weight: 700;
            transition: color 0.5s ease;
        }
        
        .color-mode-warm .card-title {
            color: var(--warm-dark);
        }
        
        .color-mode-cool .card-title {
            color: var(--cool-dark);
        }
        
        .card-content {
            font-size: 1rem;
            line-height: 1.7;
            margin-bottom: 25px;
            transition: color 0.5s ease;
        }
        
        .color-mode-warm .card-content {
            color: #555;
        }
        
        .color-mode-cool .card-content {
            color: #4A5568;
        }
        
        .highlight {
            padding: 2px 5px;
            border-radius: 2px;
            font-weight: 500;
            transition: background 0.5s ease;
        }
        
        .color-mode-warm .highlight {
            background: linear-gradient(120deg, rgba(218, 165, 32, 0.2), transparent 60%);
        }
        
        .color-mode-cool .highlight {
            background: linear-gradient(120deg, rgba(79, 209, 197, 0.2), transparent 60%);
        }
        
        .principles {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin: 22px 0;
        }
        
        .principle {
            padding: 9px 15px;
            border-radius: 6px;
            font-size: 0.9rem;
            font-weight: 500;
            display: flex;
            align-items: center;
            transition: all 0.3s ease;
        }
        
        .color-mode-warm .principle {
            background: var(--warm-light);
            color: var(--warm-primary);
        }
        
        .color-mode-cool .principle {
            background-color: rgba(42, 67, 101, 0.05);
            color: var(--cool-primary);
        }
        
        .principle:hover {
            transform: translateY(-2px);
        }
        
        .color-mode-warm .principle:hover {
            box-shadow: 0 3px 10px rgba(139, 90, 43, 0.1);
        }
        
        .color-mode-cool .principle:hover {
            box-shadow: 0 3px 10px rgba(42, 67, 101, 0.1);
        }
        
        .principle i {
            margin-right: 6px;
            transition: color 0.5s ease;
        }
        
        .color-mode-warm .principle i {
            color: var(--warm-accent);
        }
        
        .color-mode-cool .principle i {
            color: var(--cool-primary);
        }
        
        .products-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 15px;
            margin-top: 20px;
        }
        
        .product-item {
            display: flex;
            align-items: center;
            padding: 8px 0;
            transition: transform 0.3s ease;
        }
        
        .product-item:hover {
            transform: translateX(5px);
        }
        
        .product-icon {
            width: 34px;
            height: 34px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-right: 12px;
        }
        
        .color-mode-warm .product-icon {
            background: rgba(139, 90, 43, 0.1);
        }
        
        .color-mode-cool .product-icon {
            background: rgba(42, 67, 101, 0.1);
        }
        
        .product-icon i {
            font-size: 14px;
            transition: color 0.5s ease;
        }
        
        .color-mode-warm .product-icon i {
            color: var(--warm-primary);
        }
        
        .color-mode-cool .product-icon i {
            color: var(--cool-primary);
        }
        
        .promise-section {
            padding: 22px;
            border-radius: 0 10px 10px 0;
            margin-top: 25px;
            transition: all 0.5s ease;
        }
        
        .color-mode-warm .promise-section {
            background: linear-gradient(135deg, rgba(139, 90, 43, 0.03), rgba(85, 107, 47, 0.03));
            border-left: 3px solid var(--warm-accent);
        }
        
        .color-mode-cool .promise-section {
            background: linear-gradient(135deg, rgba(42, 67, 101, 0.03), rgba(74, 85, 104, 0.03));
            border-left: 3px solid var(--cool-primary);
        }
        
        .promise-title {
            font-size: 1.2rem;
            margin-bottom: 12px;
            font-weight: 600;
            font-family: 'Playfair Display', serif;
            transition: color 0.5s ease;
        }
        
        .color-mode-warm .promise-title {
            color: var(--warm-primary);
        }
        
        .color-mode-cool .promise-title {
            color: var(--cool-primary);
        }
        
        /* 风格标签 */
        .style-tag {
            display: inline-block;
            padding: 4px 10px;
            border-radius: 5px;
            font-size: 0.8rem;
            font-weight: 500;
            margin-left: 12px;
            vertical-align: middle;
            transition: all 0.3s ease;
        }
        
        .color-mode-warm .style-tag {
            background-color: rgba(139, 90, 43, 0.1);
            color: var(--warm-primary);
        }
        
        .color-mode-cool .style-tag {
            background-color: rgba(42, 67, 101, 0.1);
            color: var(--cool-primary);
        }
        
        /* 风格切换器 */
        .style-switcher {
            display: flex;
            justify-content: center;
            margin: 40px 0;
            gap: 12px;
        }
        
        .style-btn {
            padding: 12px 20px;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 500;
            cursor: pointer;
            transition: var(--transition);
            background-color: white;
            border: none;
            outline: none;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        
        .style-btn i {
            font-size: 1rem;
        }
        
        .style-btn.active {
            color: white;
            transform: translateY(-2px);
        }
        
        .style-btn.warm.active {
            background-color: var(--warm-primary);
            box-shadow: 0 5px 15px rgba(139, 90, 43, 0.2);
        }
        
        .style-btn.cool.active {
            background-color: var(--cool-primary);
            box-shadow: 0 5px 15px rgba(42, 67, 101, 0.2);
        }
        
        .color-mode-warm .style-btn {
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
        }
        
        .color-mode-cool .style-btn {
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.07);
        }
        
        /* 装饰元素 */
        .decor-element {
            position: absolute;
            z-index: 0;
            opacity: 0.04;
            transition: all 0.5s ease;
        }
        
        .decor-1 {
            top: 8%;
            left: 2%;
            font-size: 10rem;
            transform: rotate(-15deg);
        }
        
        .decor-2 {
            bottom: 6%;
            right: 2%;
            font-size: 9rem;
            transform: rotate(15deg);
        }
        
        .color-mode-warm .decor-1 {
            color: var(--warm-primary);
        }
        
        .color-mode-warm .decor-2 {
            color: var(--warm-secondary);
        }
        
        .color-mode-cool .decor-1 {
            color: var(--cool-primary);
        }
        
        .color-mode-cool .decor-2 {
            color: var(--cool-secondary);
        }
        
        /* 响应式设计 */
        @media (max-width: 768px) {
            .brand-story {
                padding: 60px 0;
            }
            
            .section-title {
                font-size: 2.4rem;
            }
            
            .section-subtitle {
                font-size: 1rem;
            }
            
            .story-card {
                padding: 25px;
            }
            
            .card-title {
                font-size: 1.4rem;
            }
            
            .card-content {
                font-size: 0.95rem;
            }
            
            .principles {
                gap: 8px;
            }
            
            .principle {
                padding: 8px 12px;
                font-size: 0.85rem;
            }
            
            .style-tag {
                display: block;
                margin-left: 0;
                margin-top: 8px;
                width: fit-content;
            }
        }
        
        @media (max-width: 550px) {
            .section-title {
                font-size: 2rem;
            }
            
            .card-header {
                flex-direction: column;
                align-items: flex-start;
            }
            
            .card-icon {
                margin-right: 0;
                margin-bottom: 15px;
            }
            
            .decor-element {
                display: none;
            }
            
            .style-switcher {
                flex-wrap: wrap;
                padding: 0 15px;
            }
            
            .style-btn {
                flex: 1;
                min-width: 140px;
                justify-content: center;
            }
        }