:root {
            --primary: #0056b3;
            --secondary: #0d6efd;
            --accent: #00a8cc;
            --bg-light: #f8f9fa;
            --card-bg: #ffffff;
            --text-dark: #212529;
            --text-muted: #6c757d;
            --border: #e9ecef;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.1);
            --radius-md: 10px;
            --radius-lg: 16px;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
            background-color: var(--bg-light);
            color: var(--text-dark);
            line-height: 1.6;
            padding: 16px;
        }

        .container {
            max-width: 900px;
            margin: 0 auto;
        }

        .product-card {
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            overflow: hidden;
            margin-bottom: 24px;
        }

        .hero-banner {
            position: relative;
            background: linear-gradient(135deg, #002b5b 0%, #0056b3 100%);
            color: #ffffff;
            padding: 32px 24px;
        }

        .badge-tag {
            display: inline-block;
            background: rgba(255, 255, 255, 0.2);
            backdrop-filter: blur(4px);
            color: #ffffff;
            font-size: 12px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1px;
            padding: 4px 12px;
            border-radius: 20px;
            margin-bottom: 16px;
        }

        .main-title {
            font-size: 24px;
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 12px;
        }

        .subtitle {
            font-size: 14px;
            opacity: 0.9;
        }

        .content-body {
            padding: 24px 20px;
        }

        .intro-text {
            font-size: 15px;
            color: #333;
            margin-bottom: 24px;
            padding-bottom: 16px;
            border-bottom: 1px solid var(--border);
        }

        .image-container {
            width: 100%;
            margin: 20px 0;
            border-radius: var(--radius-md);
            overflow: hidden;
            background-color: #eef2f5;
        }

        .image-container img {
            width: 100%;
            height: auto;
            display: block;
            object-fit: cover;
        }

        .image-caption {
            font-size: 12px;
            color: var(--text-muted);
            text-align: center;
            padding: 8px;
            background: #f1f3f5;
        }

        .section-heading {
            font-size: 18px;
            font-weight: 700;
            color: var(--primary);
            margin: 28px 0 16px 0;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .section-heading::before {
            content: '';
            display: block;
            width: 4px;
            height: 18px;
            background-color: var(--secondary);
            border-radius: 2px;
        }

        .accordion-item {
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            transition: all 0.2s ease;
        }

        .accordion-header {
            width: 100%;
            background: #ffffff;
            border: none;
            padding: 14px 16px;
            text-align: left;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-dark);
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            outline: none;
        }

        .accordion-header:hover {
            background-color: #f8f9fa;
        }

        .accordion-icon {
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: #eef2f7;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            color: var(--secondary);
            transition: transform 0.3s ease;
        }

        .accordion-item.active .accordion-icon {
            transform: rotate(180deg);
            background: var(--secondary);
            color: #ffffff;
        }

        .accordion-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out, padding 0.3s ease;
            background: #fcfdfe;
            font-size: 14px;
            color: #495057;
            padding: 0 16px;
        }

        .accordion-item.active .accordion-content {
            padding: 12px 16px 16px 16px;
        }

        .feature-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 12px;
            margin: 16px 0;
        }

        .feature-card {
            background: #f0f7ff;
            border-left: 4px solid var(--secondary);
            padding: 14px;
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
        }

        .feature-card h4 {
            font-size: 14px;
            color: var(--primary);
            margin-bottom: 4px;
        }

        .feature-card p {
            font-size: 13px;
            color: #555;
        }

        .specs-table {
            width: 100%;
            border-collapse: collapse;
            margin-top: 12px;
            font-size: 14px;
            background: #ffffff;
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border);
        }

        .specs-table tr {
            border-bottom: 1px solid var(--border);
        }

        .specs-table tr:last-child {
            border-bottom: none;
        }

        .specs-table td {
            padding: 12px 14px;
        }

        .specs-table td:first-child {
            font-weight: 600;
            color: var(--text-dark);
            width: 45%;
            background-color: #f8f9fa;
        }

        .company-box {
            background: linear-gradient(to right, #f8f9fa, #eef2f7);
            border-radius: var(--radius-md);
            padding: 18px;
            margin-top: 24px;
            font-size: 13px;
            color: var(--text-muted);
            border: 1px solid var(--border);
        }

        .company-box strong {
            color: var(--text-dark);
            font-size: 14px;
            display: block;
            margin-bottom: 6px;
        }

        @media (min-width: 600px) {
            body {
                padding: 32px 16px;
            }

            .main-title {
                font-size: 28px;
            }

            .content-body {
                padding: 32px;
            }

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