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

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: #333;
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }


        /* Hero Section */
        .hero {
            padding: 4rem 0;
            text-align: center;
        }

        .hero h2 {
            font-size: 3rem;
            font-weight: 700;
            color: #2d3748;
            margin-bottom: 1.5rem;
            background: linear-gradient(45deg, #667eea 0%, #764ba2 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero p {
            font-size: 1.25rem;
            color: #4a5568;
            max-width: 800px;
            margin: 0 auto 3rem;
        }

        /* Device Images */
        .device-gallery {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin: 3rem 0;
        }

        .device-card {
            background: white;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

        .device-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
        }

        .device-card img {
            width: 100%;
            height: 250px;
            object-fit: cover;
        }

        .device-card-content {
            padding: 1.5rem;
        }

        .device-card h3 {
            font-size: 1.25rem;
            font-weight: 600;
            color: #2d3748;
            margin-bottom: 0.5rem;
        }

        .device-card p {
            color: #718096;
            font-size: 0.95rem;
        }

        /* Features Section */
        .features {
            background: white;
            padding: 4rem 0;
            margin: 3rem 0;
            border-radius: 24px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        }

        .section-title {
            text-align: center;
            margin-bottom: 3rem;
        }

        .section-title h3 {
            font-size: 2.5rem;
            font-weight: 700;
            color: #2d3748;
            margin-bottom: 1rem;
        }

        .section-title p {
            font-size: 1.1rem;
            color: #718096;
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 2rem;
        }

        .feature-card {
            background: #f7fafc;
            padding: 2rem;
            border-radius: 16px;
            border-left: 4px solid #667eea;
            transition: transform 0.3s ease;
        }

        .feature-card:hover {
            transform: translateX(10px);
        }

        .feature-icon {
            width: 60px;
            height: 60px;
            background: linear-gradient(45deg, #667eea 0%, #764ba2 100%);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 24px;
            margin-bottom: 1rem;
        }

        .feature-card h4 {
            font-size: 1.25rem;
            font-weight: 600;
            color: #2d3748;
            margin-bottom: 0.75rem;
        }

        .feature-card p {
            color: #4a5568;
            line-height: 1.6;
        }

        /* Specifications */
        .specifications {
            background: #f7fafc;
            padding: 4rem 0;
            margin: 3rem 0;
            border-radius: 24px;
        }

        .spec-table {
            background: white;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            max-width: 800px;
            margin: 0 auto;
        }

        .spec-row {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1.5rem 2rem;
            border-bottom: 1px solid #e2e8f0;
        }

        .spec-row:last-child {
            border-bottom: none;
        }

        .spec-row:nth-child(even) {
            background: #f8fafc;
        }

        .spec-label {
            font-weight: 600;
            color: #2d3748;
        }

        .spec-value {
            color: #4a5568;
            font-weight: 500;
        }

        /* Expandable Sections */
        .info-sections {
            margin: 3rem 0;
        }

        .info-card {
            background: white;
            border-radius: 16px;
            margin-bottom: 1.5rem;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            overflow: hidden;
        }

        .info-header {
            padding: 1.5rem 2rem;
            background: linear-gradient(45deg, #667eea 0%, #764ba2 100%);
            color: white;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: background 0.3s ease;
        }

        .info-header:hover {
            background: linear-gradient(45deg, #5a67d8 0%, #6b46c1 100%);
        }

        .info-header h4 {
            font-size: 1.25rem;
            font-weight: 600;
        }

        .info-content {
            padding: 2rem;
            display: none;
            animation: slideDown 0.3s ease;
        }

        .info-content.active {
            display: block;
        }

        .info-content p {
            color: #4a5568;
            line-height: 1.8;
            margin-bottom: 1rem;
        }

        .info-content h5 {
            font-size: 1.1rem;
            font-weight: 600;
            color: #2d3748;
            margin: 1.5rem 0 0.75rem;
        }

        .separator {
            height: 1px;
            background: #e2e8f0;
            margin: 1.5rem 0;
        }

        

        /* Animations */
        @keyframes slideDown {
            from {
                opacity: 0;
                transform: translateY(-10px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* Responsive Design */
        @media (max-width: 768px) {
            .hero h2 {
                font-size: 2rem;
            }

            .hero p {
                font-size: 1.1rem;
            }

            .device-gallery {
                grid-template-columns: 1fr;
            }

            .features-grid {
                grid-template-columns: 1fr;
            }

            .spec-row {
                flex-direction: column;
                align-items: flex-start;
                gap: 0.5rem;
            }

            .header-content {
                flex-direction: column;
                gap: 1rem;
            }

            .info-header {
                padding: 1rem 1.5rem;
            }

            .info-content {
                padding: 1.5rem;
            }
        }

        /* Utility Classes */
        .text-center {
            text-align: center;
        }

        .mb-2 {
            margin-bottom: 0.5rem;
        }

        .mb-4 {
            margin-bottom: 1rem;
        }

        .mt-4 {
            margin-top: 1rem;
        }