:root {
            --primary-color: #1a1a1a;
            --secondary-color: #333333;
            --accent-color: #2c5282;
            --light-gray: #f8f9fa;
            --medium-gray: #e9ecef;
            --text-light: #6c757d;
            --white: #ffffff;
            --e-ink-bg: #f6f6f6;
            --border-radius: 12px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
            --transition: all 0.3s ease;
        }

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

        body {
            font-family: 'Inter', sans-serif;
            line-height: 1.6;
            color: var(--primary-color);
            background-color: var(--white);
            overflow-x: hidden;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Header & Hero */
        .hero-section {
            background-color: var(--e-ink-bg);
            padding: 80px 0;
            margin-bottom: 100px;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }

        .hero-content h1 {
            font-size: 48px;
            font-weight: 700;
            line-height: 1.1;
            margin-bottom: 20px;
            color: var(--primary-color);
        }

        .hero-content h2 {
            font-size: 24px;
            font-weight: 400;
            color: var(--text-light);
            margin-bottom: 40px;
        }

        .hero-divider {
            width: 80px;
            height: 3px;
            background-color: var(--accent-color);
            margin: 30px 0;
        }

        .hero-features {
            list-style: none;
        }

        .hero-features li {
            margin-bottom: 20px;
            font-size: 18px;
            padding-left: 30px;
            position: relative;
        }

        .hero-features li:before {
            content: "✓";
            position: absolute;
            left: 0;
            color: var(--accent-color);
            font-weight: bold;
        }

        .hero-image {
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            transform: perspective(1000px) rotateY(-5deg);
            transition: var(--transition);
        }

        .hero-image:hover {
            transform: perspective(1000px) rotateY(0deg);
        }

        .hero-image img {
            width: 100%;
            height: auto;
            display: block;
        }

        /* Section Styles */
        .section {
            margin-bottom: 100px;
        }

        .section-header {
            text-align: center;
            margin-bottom: 60px;
        }

        .section-header h2 {
            font-size: 36px;
            font-weight: 700;
            margin-bottom: 20px;
            color: var(--primary-color);
        }

        .section-divider {
            width: 60px;
            height: 2px;
            background-color: var(--accent-color);
            margin: 0 auto;
        }

        /* Solutions Section */
        .solutions-section {
            background-color: var(--light-gray);
            border-radius: var(--border-radius);
            padding: 80px 0;
            margin-bottom: 100px;
        }

        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 40px;
            margin-top: 60px;
        }

        .solution-card {
            background: var(--white);
            border-radius: var(--border-radius);
            padding: 40px;
            box-shadow: var(--shadow-md);
            transition: var(--transition);
            text-align: center;
            border: 1px solid var(--medium-gray);
        }

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

        .solution-card h3 {
            font-size: 24px;
            margin-bottom: 10px;
            color: var(--primary-color);
        }

        .solution-card .subtitle {
            font-size: 16px;
            color: var(--accent-color);
            font-weight: 500;
            margin-bottom: 30px;
        }

        .icon-container {
            width: 120px;
            height: 120px;
            margin: 0 auto 30px;
            background-color: var(--light-gray);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 20px;
        }

        .icon-container img {
            max-width: 100%;
            max-height: 100%;
        }

        .solution-card p {
            font-size: 16px;
            color: var(--text-light);
            margin-bottom: 30px;
            line-height: 1.6;
        }

        .solution-card a {
            display: inline-block;
            background-color: var(--accent-color);
            color: var(--white);
            padding: 12px 30px;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 500;
            transition: var(--transition);
        }

        .solution-card a:hover {
            background-color: #1a456b;
            transform: translateY(-2px);
        }

        /* Features Grid */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(6, 1fr);
            gap: 24px;
            margin-bottom: 40px;
        }

        .feature-card {
            background: var(--white);
            border-radius: var(--border-radius);
            padding: 30px 20px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid var(--medium-gray);
        }

        .feature-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }

        .feature-icon {
            width: 80px;
            height: 80px;
            margin: 0 auto 20px;
            background-color: var(--light-gray);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 16px;
        }

        .feature-icon img {
            max-width: 100%;
            max-height: 100%;
        }

        .feature-card p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.5;
        }

        /* Process Section */
        .process-diagram {
            background: var(--light-gray);
            border-radius: var(--border-radius);
            padding: 60px;
            margin-bottom: 40px;
            text-align: center;
        }

        .process-diagram img {
            max-width: 100%;
            height: auto;
        }

        /* Mobile App */
        .mobile-app-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            margin-top: 50px;
        }

        .app-step {
            text-align: center;
        }

        .app-step img {
            width: 100%;
            border-radius: var(--border-radius);
            margin-bottom: 20px;
            box-shadow: var(--shadow-md);
        }

        .app-step p {
            font-size: 16px;
            font-weight: 500;
            color: var(--secondary-color);
        }

        /* Customization */
        .customization-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 40px;
        }

        .customization-item {
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }

        .customization-item:hover {
            box-shadow: var(--shadow-lg);
            transform: scale(1.02);
        }

        .customization-item img {
            width: 100%;
            height: auto;
            display: block;
        }

        /* Eco Section */
        .eco-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 40px;
            text-align: center;
            margin-top: 50px;
        }

        .eco-item {
            padding: 30px;
        }

        .eco-icon {
            width: 80px;
            height: 80px;
            margin: 0 auto 20px;
            background-color: var(--light-gray);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .eco-icon img {
            max-width: 60%;
            max-height: 60%;
        }

        .eco-item h3 {
            font-size: 20px;
            margin-bottom: 15px;
            color: var(--primary-color);
        }

        /* Battery Comparison */
        .battery-chart {
            text-align: center;
            margin: 60px 0;
        }

        .battery-chart img {
            max-width: 100%;
            height: auto;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow-sm);
        }

        /* Resources */
        .resources-section {
            background-color: var(--light-gray);
            border-radius: var(--border-radius);
            padding: 60px;
            margin-bottom: 80px;
        }

        .resources-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 40px;
        }

        .resource-item {
            padding: 25px;
            background: var(--white);
            border-radius: calc(var(--border-radius) - 4px);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }

        .resource-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }

        .resource-item a {
            color: var(--accent-color);
            text-decoration: none;
            font-size: 18px;
            font-weight: 500;
            display: block;
            margin-bottom: 10px;
        }

        .resource-item a:hover {
            text-decoration: underline;
        }

        /* Products */
        .products-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            margin-top: 40px;
        }

        .product-card {
            text-align: center;
            transition: var(--transition);
        }

        .product-card:hover {
            transform: translateY(-8px);
        }

        .product-image {
            border-radius: var(--border-radius);
            overflow: hidden;
            margin-bottom: 20px;
            box-shadow: var(--shadow-md);
        }

        .product-image img {
            width: 100%;
            height: auto;
            display: block;
        }

        .product-card p {
            font-size: 16px;
            color: var(--text-light);
        }

        .product-card a {
            color: var(--secondary-color);
            text-decoration: none;
        }

        .product-card a:hover {
            color: var(--accent-color);
        }

        /* About Us */
        .about-section {
            background-color: var(--white);
            padding: 80px 0;
            text-align: center;
        }

        .about-content {
            max-width: 800px;
            margin: 0 auto;
        }

        .about-logo {
            width: 200px;
            margin: 0 auto 40px;
        }

        .about-logo img {
            width: 100%;
            height: auto;
            filter: brightness(0); /* Makes logo black on white background */
        }

        .about-content p {
            font-size: 18px;
            margin-bottom: 30px;
            color: var(--text-light);
            line-height: 1.7;
        }

        .contact-email {
            display: inline-block;
            background-color: var(--accent-color);
            color: var(--white);
            padding: 15px 30px;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 500;
            margin-top: 20px;
            transition: var(--transition);
        }

        .contact-email:hover {
            background-color: #1a456b;
            transform: translateY(-2px);
        }

        /* Footer */
        .footer {
            background-color: var(--light-gray);
            color: var(--primary-color);
            padding: 40px 0;
            margin-top: 0;
            border-top: 1px solid var(--medium-gray);
            text-align: center;
        }

        .footer p {
            font-size: 14px;
            color: var(--text-light);
            margin-top: 20px;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            
            .solutions-grid,
            .mobile-app-grid,
            .customization-grid,
            .products-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .eco-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 768px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            
            .hero-content h1 {
                font-size: 36px;
            }
            
            .solutions-grid {
                grid-template-columns: 1fr;
            }
            
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .mobile-app-grid,
            .customization-grid,
            .products-grid,
            .resources-grid {
                grid-template-columns: 1fr;
            }
            
            .section-header h2 {
                font-size: 28px;
            }
        }

        @media (max-width: 480px) {
            .container {
                padding: 0 16px;
            }
            
            .features-grid {
                grid-template-columns: 1fr;
            }
            
            .hero-section {
                padding: 60px 0;
                margin-bottom: 60px;
            }
            
            .section {
                margin-bottom: 60px;
            }
            
            .feature-card,
            .resource-item,
            .solution-card {
                padding: 20px;
            }
            
            .process-diagram {
                padding: 30px;
            }
        }