:root {
            --space-0: 0px;
            --space-1: 0.25rem;
            --space-2: 0.5rem;
            --space-3: 1rem;
            --space-4: 1.5rem;
            --space-5: 2rem;
            --space-6: 3rem;
            --space-8: 4rem;
            --space-10: 5rem;
            
            --color-white: #ffffff;
            --color-gray-50: #f9fafb;
            --color-gray-100: #f3f4f6;
            --color-gray-200: #e5e7eb;
            --color-gray-300: #d1d5db;
            --color-gray-400: #9ca3af;
            --color-gray-500: #6b7280;
            --color-gray-600: #4b5563;
            --color-gray-700: #374151;
            --color-gray-800: #1f2937;
            --color-gray-900: #111827;
            
            --color-primary: #111827;
            --color-secondary: #92400e;
            --color-accent: #7c2d12;
            
            --radius-sm: 0.25rem;
            --radius-md: 0.5rem;
            --radius-lg: 0.75rem;
            --radius-xl: 1rem;
            --radius-full: 9999px;
            
            --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
            --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
            --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
            --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
            
            --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            line-height: 1.6;
            color: var(--color-gray-800);
            background-color: var(--color-white);
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--space-4);
        }
        
        /* Hero Section */
        .warranty-hero {
            padding: var(--space-10) 0 var(--space-8);
            text-align: center;
            border-bottom: 1px solid var(--color-gray-200);
        }
        
        .warranty-hero h1 {
            font-size: 3rem;
            font-weight: 700;
            letter-spacing: -0.025em;
            margin-bottom: var(--space-4);
            color: var(--color-gray-900);
        }
        
        .warranty-hero p {
            font-size: 1.25rem;
            max-width: 800px;
            margin: 0 auto var(--space-6);
            color: var(--color-gray-600);
        }
        
        .hero-stats {
            display: flex;

            justify-content: center;
            gap: var(--space-8);
            margin-top: var(--space-6);
        }
        
        .stat-item {
            text-align: center;
        }
        
        .stat-number {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--color-secondary);
            margin-bottom: var(--space-1);
        }
        
        .stat-label {
            color: var(--color-gray-600);
            font-size: 0.875rem;
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }
        
        /* Section通用样式 */
        .section {
            padding: var(--space-10) 0;
        }
        
        .section:nth-child(even) {
            background-color: var(--color-gray-50);
        }
        
        .section-title {
            text-align: center;
            margin-bottom: var(--space-8);
        }
        
        .section-title h2 {
            font-size: 2.25rem;
            margin-bottom: var(--space-3);
            color: var(--color-gray-900);
            position: relative;
            display: inline-block;
        }
        
        .section-title h2::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 50%;
            transform: translateX(-50%);
            width: 64px;
            height: 3px;
            background-color: var(--color-secondary);
            border-radius: var(--radius-full);
        }
        
        .section-title p {
            font-size: 1.125rem;
            color: var(--color-gray-600);
            max-width: 600px;
            margin: 0 auto;
        }
        
        /* 保修方案对比 */
        .warranty-comparison {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(min(100%, 350px), 1fr));
            gap: var(--space-6);
            margin-top: var(--space-6);
        }
        
        .warranty-card {
            background: var(--color-white);
            border: 1px solid var(--color-gray-200);
            border-radius: var(--radius-lg);
            padding: var(--space-6);
            transition: all var(--transition-base);
            position: relative;
        }
        
        .warranty-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-xl);
            border-color: var(--color-secondary);
        }
        
        .warranty-card.featured {
            border-color: var(--color-secondary);
            border-width: 2px;
        }
        
        .warranty-badge {
            position: absolute;
            top: -12px;
            left: 50%;
            transform: translateX(-50%);
            background: var(--color-secondary);
            color: var(--color-white);
            padding: var(--space-1) var(--space-4);
            border-radius: var(--radius-full);
            font-size: 0.875rem;
            font-weight: 600;
        }
        
        .warranty-header {
            text-align: center;
            margin-bottom: var(--space-4);
            padding-bottom: var(--space-4);
            border-bottom: 1px solid var(--color-gray-200);
        }
        
        .warranty-type {
            font-size: 1.5rem;
            font-weight: 600;
            color: var(--color-gray-900);
            margin-bottom: var(--space-2);
        }
        
        .warranty-duration {
            font-size: 1.125rem;
            color: var(--color-secondary);
            font-weight: 600;
        }
        
        .warranty-price {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--color-accent);
            margin: var(--space-4) 0;
            text-align: center;
        }
        
        .warranty-price small {
            font-size: 1rem;
            color: var(--color-gray-500);
            font-weight: 400;
        }
        
        .warranty-features {
            list-style: none;
            padding: 0;
            margin-bottom: var(--space-6);
        }
        
        .warranty-features li {
            padding: var(--space-2) 0;
            color: var(--color-gray-600);
            position: relative;
            padding-left: var(--space-4);
        }
        
        .warranty-features li::before {
            content: "✓";
            color: var(--color-secondary);
            position: absolute;
            left: 0;
            font-weight: bold;
        }
        
        /* 覆盖范围 */
        .coverage-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(min(100%, 250px), 1fr));
            gap: var(--space-6);
            margin-top: var(--space-6);
        }
        
        .coverage-item {
            text-align: center;
            padding: var(--space-4);
        }
        
        .coverage-icon {
            width: 64px;
            height: 64px;
            margin: 0 auto var(--space-4);
            background-color: var(--color-gray-100);
            border-radius: var(--radius-full);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--color-secondary);
        }
        
        .coverage-item h3 {
            font-size: 1.125rem;
            margin-bottom: var(--space-2);
            color: var(--color-gray-900);
        }
        
        .coverage-item p {
            color: var(--color-gray-600);
            font-size: 0.875rem;
        }
        
        /* 客户案例 */
        .case-studies {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr));
            gap: var(--space-6);
        }
        
        .case-study {
            background: var(--color-white);
            border: 1px solid var(--color-gray-200);
            border-radius: var(--radius-lg);
            padding: var(--space-5);
            transition: all var(--transition-base);
        }
        
        .case-study:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-lg);
        }
        
        .case-header {
            display: flex;
            align-items: center;
            gap: var(--space-3);
            margin-bottom: var(--space-3);
        }
        
        .case-avatar {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background-color: var(--color-gray-100);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.25rem;
            color: var(--color-secondary);
        }
        
        .case-info h4 {
            font-size: 1rem;
            margin-bottom: var(--space-1);
            color: var(--color-gray-900);
        }
        
        .case-info p {
            font-size: 0.875rem;
            color: var(--color-gray-500);
        }
        
        .case-quote {
            font-style: italic;
            color: var(--color-gray-600);
            line-height: 1.7;
            position: relative;
            padding-left: var(--space-3);
        }
        
        .case-quote::before {
            content: '"';
            font-size: 2rem;
            color: var(--color-gray-300);
            position: absolute;
            left: 0;
            top: -8px;
        }
        
        /* 流程步骤 */
        .process-steps {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr));
            gap: var(--space-6);
            margin-top: var(--space-6);
            position: relative;
        }
        
        .process-steps::before {
            content: '';
            position: absolute;
            top: 40px;
            left: 10%;
            right: 10%;
            height: 2px;
            background-color: var(--color-gray-200);
            z-index: 1;
        }
        
        .process-step {
            text-align: center;
            position: relative;
            z-index: 2;
        }
        
        .step-number {
            width: 80px;
            height: 80px;
            margin: 0 auto var(--space-4);
            background-color: var(--color-white);
            border: 2px solid var(--color-gray-200);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--color-secondary);
            transition: all var(--transition-base);
        }
        
        .step-content h3 {
            font-size: 1.125rem;
            margin-bottom: var(--space-2);
            color: var(--color-gray-900);
        }
        
        .step-content p {
            color: var(--color-gray-600);
            font-size: 0.875rem;
        }
        
        /* CTA Section */
        .cta-section {
            text-align: center;
            padding: var(--space-10) var(--space-4);
            background: linear-gradient(135deg, var(--color-gray-900) 0%, var(--color-gray-800) 100%);
            color: var(--color-white);
            border-radius: var(--radius-xl);
            margin: var(--space-10) 0;
        }
        
        .cta-section h2 {
            font-size: 2.5rem;
            margin-bottom: var(--space-4);
            color: var(--color-white);
        }
        
        .cta-section p {
            font-size: 1.125rem;
            max-width: 600px;
            margin: 0 auto var(--space-6);
            color: var(--color-gray-300);
        }
        
        .cta-buttons {
            display: flex;
            justify-content: center;
            gap: var(--space-4);
            flex-wrap: wrap;
        }
        
        .cta-button {
            padding: var(--space-3) var(--space-6);
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 1rem;
            text-decoration: none;
            transition: all var(--transition-base);
            border: 2px solid transparent;
        }
        
        .cta-button.primary {
            background-color: var(--color-secondary);
            color: var(--color-white);
        }
        
        .cta-button.primary:hover {
            background-color: var(--color-accent);
            transform: translateY(-2px);
            box-shadow: var(--shadow-lg);
        }
        
        .cta-button.secondary {
            background-color: transparent;
            color: var(--color-white);
            border-color: var(--color-gray-400);
        }
        
        .cta-button.secondary:hover {
            border-color: var(--color-white);
            transform: translateY(-2px);
        }
        
        /* 免责条款 */
        .disclaimer {
            padding: var(--space-6);
            background-color: var(--color-gray-100);
            border-radius: var(--radius-lg);
            margin-top: var(--space-8);
        }
        
        .disclaimer h3 {
            font-size: 1.125rem;
            margin-bottom: var(--space-3);
            color: var(--color-gray-900);
        }
        
        .disclaimer ul {
            list-style: none;
            padding: 0;
        }
        
        .disclaimer li {
            padding: var(--space-1) 0;
            color: var(--color-gray-600);
            position: relative;
            padding-left: var(--space-4);
        }
        
        .disclaimer li::before {
            content: "•";
            color: var(--color-secondary);
            position: absolute;
            left: 0;
        }
        
        /* 响应式设计 */
        @media (max-width: 768px) {
            .warranty-hero h1 {
                font-size: 2rem;
            }
            
            .hero-stats {
                flex-direction: column;
                gap: var(--space-4);
            }
            
            .section-title h2 {
                font-size: 1.75rem;
            }
            
            .process-steps::before {
                display: none;
            }
            
            .cta-buttons {
                flex-direction: column;
                align-items: center;
            }
            
            .cta-button {
                width: 100%;
                text-align: center;
            }
        }
        
        @media (max-width: 480px) {
            .container {
                padding: 0 var(--space-3);
            }
            
            .section {
                padding: var(--space-8) 0;
            }
            
            .warranty-comparison,
            .coverage-grid,
            .case-studies,
            .process-steps {
                grid-template-columns: 1fr;
            }
        }