:root {
            --primary-color: #F1302B;
            --text-color: #222222;
            --bg-light: #f9f9f9;
            --border-color: #e5e5e5;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            background-color: #ffffff;
            padding: 15px;
        }

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

        h2.section-title {
            font-size: 24px;
            color: var(--text-color);
            text-align: center;
            margin: 40px 0 20px;
            position: relative;
            padding-bottom: 10px;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        h2.section-title::after {
            content: '';
            width: 40px;
            height: 3px;
            background-color: var(--primary-color);
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
        }

        /* Hero / Overview Section */
        .hero-section {
            display: flex;
            flex-direction: column;
            gap: 20px;
            margin-bottom: 40px;
        }

        .hero-img {
            width: 100%;
            height: auto;
            border-radius: 4px;
            box-shadow: 0 2px 8px rgba(0,0,0,0.05);
        }

        .hero-text {
            background-color: var(--bg-light);
            padding: 25px;
            border-radius: 4px;
            border-left: 4px solid var(--primary-color);
        }

        .hero-text h3 {
            font-size: 20px;
            margin-bottom: 10px;
        }

        /* Working Principle Section */
        .principle-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 20px;
            margin-bottom: 40px;
        }

        .principle-card {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 4px;
            padding: 20px;
            text-align: center;
        }

        .principle-card img {
            width: 100%;
            max-width: 400px;
            height: auto;
            margin-bottom: 15px;
        }

        .principle-card h4 {
            font-size: 16px;
            margin-bottom: 5px;
        }

        /* Specifications Table */
        .table-responsive {
            width: 100%;
            overflow-x: auto;
            margin-bottom: 40px;
            border: 1px solid var(--border-color);
            border-radius: 4px;
        }

        table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            font-size: 14px;
        }

        th, td {
            padding: 14px 15px;
            border-bottom: 1px solid var(--border-color);
        }

        th {
            background-color: #111111;
            color: white;
            font-weight: 600;
            text-transform: uppercase;
            font-size: 13px;
            letter-spacing: 0.5px;
        }

        tr:nth-child(even) {
            background-color: var(--bg-light);
        }

        /* Features Section */
        .features-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 15px;
            margin-bottom: 40px;
        }

        .feature-item {
            background: var(--bg-light);
            padding: 20px;
            border-radius: 4px;
            border: 1px solid transparent;
        }

        .feature-item:hover {
            border-color: var(--border-color);
        }

        .feature-item strong {
            color: var(--primary-color);
            display: block;
            margin-bottom: 8px;
            font-size: 16px;
        }

        /* System Components */
        .components-list {
            list-style: none;
            display: grid;
            grid-template-columns: 1fr;
            gap: 20px;
        }

        .component-card {
            border: 1px solid var(--border-color);
            border-radius: 4px;
            padding: 15px;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .component-card img {
            width: 100%;
            height: auto;
            border-radius: 2px;
        }

        .component-card strong {
            font-size: 15px;
            margin-top: 5px;
        }

        /* Responsive Media Queries */
        @media (min-width: 768px) {
            body {
                padding: 30px;
            }

            .hero-section {
                flex-direction: row;
                align-items: stretch;
            }

            .hero-img {
                width: 50%;
                object-fit: cover;
            }

            .hero-text {
                width: 50%;
                display: flex;
                flex-direction: column;
                justify-content: center;
            }

            .principle-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .components-list {
                grid-template-columns: repeat(3, 1fr);
            }
        }