:root {
            --primary-color: #2c3e50;
            --secondary-color: #3498db;
            --accent-color: #e74c3c;
            --light-bg: #f8f9fa;
            --border-radius: 12px;
            --box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        body {
            background-color: #fff;
            color: #333;
            line-height: 1.6;
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
        }
        
        /* Header & Hero Section */
        .hero-section {
            background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
            border-radius: var(--border-radius);
            padding: 40px 30px;
            margin-bottom: 40px;
            text-align: center;
            box-shadow: var(--box-shadow);
            position: relative;
            overflow: hidden;
        }
        
        .hero-section::before {
            content: "";
            position: absolute;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(52, 152, 219, 0.1) 0%, rgba(52, 152, 219, 0) 70%);
            top: -150px;
            right: -150px;
            z-index: 0;
        }
        
        .hero-section > * {
            position: relative;
            z-index: 1;
        }
        
        .product-title {
            color: var(--primary-color);
            font-size: 2.5rem;
            margin-bottom: 15px;
            font-weight: 700;
        }
        
        .product-subtitle {
            color: var(--secondary-color);
            font-size: 1.4rem;
            margin-bottom: 25px;
            font-weight: 500;
        }
        
        .tagline {
            font-size: 1.2rem;
            color: #555;
            max-width: 800px;
            margin: 0 auto 30px;
        }
        
        /* Feature Highlights */
        .feature-highlights {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 20px;
            margin: 40px 0;
        }
        
        .feature-card {
            background: white;
            border-radius: var(--border-radius);
            padding: 25px 20px;
            flex: 1;
            min-width: 250px;
            max-width: 350px;
            box-shadow: var(--box-shadow);
            text-align: center;
            transition: var(--transition);
            border-top: 4px solid var(--secondary-color);
        }
        
        .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
        }
        
        .feature-icon {
            font-size: 2.5rem;
            color: var(--secondary-color);
            margin-bottom: 15px;
        }
        
        .feature-title {
            font-size: 1.3rem;
            margin-bottom: 10px;
            color: var(--primary-color);
        }
        
        /* Content Sections */
        .section-title {
            font-size: 2rem;
            color: var(--primary-color);
            margin: 40px 0 25px;
            padding-bottom: 10px;
            border-bottom: 2px solid #eee;
            position: relative;
        }
        
        .section-title::after {
            content: "";
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 80px;
            height: 2px;
            background-color: var(--secondary-color);
        }
        
        .content-card {
            background: white;
            border-radius: var(--border-radius);
            padding: 30px;
            margin-bottom: 30px;
            box-shadow: var(--box-shadow);
        }
        
        /* Specifications Table */
        .specs-table {
            width: 100%;
            border-collapse: collapse;
            margin-top: 20px;
        }
        
        .specs-table tr:nth-child(even) {
            background-color: #f9f9f9;
        }
        
        .specs-table th {
            background-color: var(--primary-color);
            color: white;
            padding: 15px;
            text-align: left;
            font-weight: 600;
        }
        
        .specs-table td {
            padding: 15px;
            border-bottom: 1px solid #eee;
        }
        
        .specs-table tr:hover {
            background-color: #f0f7ff;
        }
        
        /* Product Components */
        .components-container {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            align-items: center;
            gap: 20px;
            margin: 40px 0;
        }
        
        .component {
            background: white;
            border-radius: var(--border-radius);
            padding: 20px;
            width: 200px;
            text-align: center;
            box-shadow: var(--box-shadow);
            transition: var(--transition);
        }
        
        .component:hover {
            transform: translateY(-5px);
        }
        
        .component img {
            max-width: 100%;
            height: auto;
            margin-bottom: 15px;
        }
        
        .component-symbol {
            font-size: 2rem;
            font-weight: bold;
            color: #bbb;
        }
        
        /* App Instructions */
        .app-instructions {
            display: flex;
            flex-wrap: wrap;
            gap: 30px;
            margin: 40px 0;
        }
        
        .app-card {
            flex: 1;
            min-width: 300px;
            background: white;
            border-radius: var(--border-radius);
            padding: 30px;
            box-shadow: var(--box-shadow);
        }
        
        .android-card {
            border-top: 4px solid #3ddc84;
        }
        
        .ios-card {
            border-top: 4px solid #007aff;
        }
        
        .app-title {
            font-size: 1.5rem;
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        
        .android-title {
            color: #3ddc84;
        }
        
        .ios-title {
            color: #007aff;
        }
        
        /* Product Applications */
        .applications-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 25px;
            margin: 40px 0;
        }
        
        .application-item {
            background: white;
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--box-shadow);
            transition: var(--transition);
        }
        
        .application-item:hover {
            transform: translateY(-10px);
        }
        
        .application-item img {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }
        
        .application-item p {
            padding: 20px;
            text-align: center;
            font-weight: 600;
            color: var(--primary-color);
        }
        
        /* CTA Buttons */
        .cta-button {
            display: inline-block;
            background-color: var(--secondary-color);
            color: white;
            padding: 15px 30px;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 600;
            font-size: 1.1rem;
            transition: var(--transition);
            border: none;
            cursor: pointer;
            margin: 10px;
        }
        
        .cta-button:hover {
            background-color: #2980b9;
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(41, 128, 185, 0.2);
        }
        
        .cta-button.secondary {
            background-color: var(--primary-color);
        }
        
        .cta-button.secondary:hover {
            background-color: #1a252f;
        }
        
        /* Responsive Design */
        @media (max-width: 768px) {
            .product-title {
                font-size: 2rem;
            }
            
            .product-subtitle {
                font-size: 1.2rem;
            }
            
            .hero-section {
                padding: 30px 20px;
            }
            
            .section-title {
                font-size: 1.7rem;
            }
            
            .content-card {
                padding: 20px;
            }
            
            .specs-table {
                font-size: 0.9rem;
            }
            
            .specs-table th, 
            .specs-table td {
                padding: 10px;
            }
        }
        
        @media (max-width: 480px) {
            body {
                padding: 15px;
            }
            
            .product-title {
                font-size: 1.7rem;
            }
            
            .app-card {
                min-width: 100%;
            }
        }
        
        /* Utility Classes */
        .text-center {
            text-align: center;
        }
        
        .mt-40 {
            margin-top: 40px;
        }
        
        .mb-40 {
            margin-bottom: 40px;
        }
        
        .highlight {
            background-color: #fffacd;
            padding: 2px 5px;
            border-radius: 3px;
            font-weight: 600;
        }
        
        .badge {
            display: inline-block;
            background-color: var(--accent-color);
            color: white;
            padding: 5px 12px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-left: 10px;
            vertical-align: middle;
        }
        
        .divider {
            height: 1px;
            background-color: #eee;
            margin: 40px 0;
        }
        
        .download-links {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            margin-top: 20px;
        }
        
        .download-link {
            display: flex;
            align-items: center;
            gap: 10px;
            background-color: #f8f9fa;
            padding: 15px 20px;
            border-radius: var(--border-radius);
            text-decoration: none;
            color: var(--primary-color);
            transition: var(--transition);
            flex: 1;
            min-width: 250px;
        }
        
        .download-link:hover {
            background-color: #e9ecef;
            transform: translateY(-3px);
        }
        
        .download-link i {
            font-size: 1.5rem;
            color: var(--secondary-color);
        }