:root {
            --primary-color: #0066cc;
            --secondary-color: #00aaff;
            --accent-color: #ff9900;
            --text-dark: #333333;
            --text-light: #666666;
            --bg-light: #f9fbfd;
            --bg-white: #ffffff;
            --border-color: #e0e0e0;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.05);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
            --radius: 8px;
            --container-width: 1200px;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
            line-height: 1.6;
            color: var(--text-dark);
            background-color: var(--bg-light);
            overflow-x: hidden;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.3s ease;
        }

        ul {
            list-style: none;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        .container {
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 20px;
            width: 100%;
        }

        /* Header */
        header {
            background: var(--bg-white);
            box-shadow: var(--shadow-sm);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        .nav-wrapper {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 70px;
        }

        .logo img {
            height: 40px;
            width: auto;
        }

        .nav-menu {
            display: flex;
            gap: 24px;
        }

        .nav-menu a {
            font-weight: 500;
            color: var(--text-dark);
            font-size: 15px;
        }

        .nav-menu a:hover {
            color: var(--primary-color);
        }

        .mobile-toggle {
            display: none;
            font-size: 24px;
            cursor: pointer;
        }

        /* Hero Section */
        .hero {
            background: linear-gradient(135deg, #f0f7ff 0%, #e6f2ff 100%);
            padding: 80px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, rgba(0,102,204,0.05) 0%, transparent 70%);
            animation: rotate 20s linear infinite;
        }

        @keyframes rotate {
            from { transform: rotate(0deg); }
            to { transform: rotate(360deg); }
        }

        .hero-content {
            position: relative;
            z-index: 1;
            max-width: 800px;
            margin: 0 auto;
        }

        h1 {
            font-size: 42px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 24px;
            line-height: 1.2;
        }

        .hero-subtitle {
            font-size: 18px;
            color: var(--text-light);
            margin-bottom: 40px;
        }

        .btn {
            display: inline-block;
            padding: 12px 32px;
            border-radius: 50px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            border: none;
            font-size: 16px;
        }

        .btn-primary {
            background: var(--primary-color);
            color: white;
            box-shadow: 0 4px 12px rgba(0,102,204,0.3);
        }

        .btn-primary:hover {
            background: #0052a3;
            transform: translateY(-2px);
        }

        .btn-outline {
            background: transparent;
            border: 2px solid var(--primary-color);
            color: var(--primary-color);
            margin-left: 16px;
        }

        .btn-outline:hover {
            background: var(--primary-color);
            color: white;
        }

        /* Sections General */
        section {
            padding: 80px 0;
        }

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

        .section-title h2 {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-dark);
        }

        .section-title p {
            color: var(--text-light);
            font-size: 16px;
            max-width: 600px;
            margin: 0 auto;
        }

        /* Services Grid */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
        }

        .service-card {
            background: var(--bg-white);
            padding: 30px;
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            border: 1px solid var(--border-color);
        }

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

        .service-icon {
            font-size: 32px;
            color: var(--primary-color);
            margin-bottom: 20px;
        }

        .service-card h3 {
            font-size: 20px;
            margin-bottom: 12px;
        }

        .service-card p {
            color: var(--text-light);
            font-size: 14px;
        }

        /* Models List */
        .models-section {
            background: var(--bg-white);
        }

        .models-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
            max-width: 900px;
            margin: 0 auto;
        }

        .model-tag {
            background: #f0f7ff;
            color: var(--primary-color);
            padding: 8px 16px;
            border-radius: 20px;
            font-size: 14px;
            font-weight: 500;
            border: 1px solid #cce4ff;
        }

        /* Comparison Table */
        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            background: var(--bg-white);
            box-shadow: var(--shadow-md);
            border-radius: var(--radius);
            overflow: hidden;
            margin-top: 40px;
        }

        .comparison-table th, .comparison-table td {
            padding: 16px;
            text-align: center;
            border-bottom: 1px solid var(--border-color);
        }

        .comparison-table th {
            background: var(--primary-color);
            color: white;
            font-weight: 600;
        }

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

        .score-badge {
            display: inline-block;
            background: #e6fffa;
            color: #00a854;
            padding: 4px 12px;
            border-radius: 12px;
            font-weight: bold;
            font-size: 14px;
        }

        /* Reviews */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }

        .review-card {
            background: var(--bg-white);
            padding: 24px;
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            border-left: 4px solid var(--primary-color);
        }

        .review-header {
            display: flex;
            align-items: center;
            margin-bottom: 16px;
        }

        .review-avatar {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: #eee;
            margin-right: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            color: var(--primary-color);
        }

        .review-info h4 {
            font-size: 16px;
            margin-bottom: 4px;
        }

        .review-role {
            font-size: 12px;
            color: var(--text-light);
        }

        .review-text {
            font-size: 14px;
            color: var(--text-dark);
            line-height: 1.6;
        }

        /* FAQ */
        .faq-item {
            background: var(--bg-white);
            margin-bottom: 16px;
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
        }

        .faq-question {
            padding: 20px;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            color: var(--text-dark);
            transition: background 0.3s;
        }

        .faq-question:hover {
            background: #f9fbfd;
        }

        .faq-answer {
            padding: 0 20px 20px;
            color: var(--text-light);
            font-size: 14px;
            display: none;
            border-top: 1px solid transparent;
        }

        .faq-item.active .faq-answer {
            display: block;
            border-top: 1px solid var(--border-color);
            padding-top: 16px;
        }

        .faq-icon {
            transition: transform 0.3s;
        }

        .faq-item.active .faq-icon {
            transform: rotate(180deg);
        }

        /* Contact Form */
        .contact-section {
            background: var(--bg-white);
        }

        .form-container {
            max-width: 600px;
            margin: 0 auto;
            background: #f9fbfd;
            padding: 40px;
            border-radius: var(--radius);
            box-shadow: var(--shadow-md);
        }

        .form-group {
            margin-bottom: 20px;
        }

        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 500;
            font-size: 14px;
        }

        .form-control {
            width: 100%;
            padding: 12px;
            border: 1px solid var(--border-color);
            border-radius: 4px;
            font-size: 14px;
            transition: border-color 0.3s;
        }

        .form-control:focus {
            outline: none;
            border-color: var(--primary-color);
        }

        textarea.form-control {
            resize: vertical;
            min-height: 100px;
        }

        /* Footer */
        footer {
            background: #1a202c;
            color: #cbd5e0;
            padding: 60px 0 20px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-col h4 {
            color: white;
            margin-bottom: 20px;
            font-size: 16px;
        }

        .footer-links li {
            margin-bottom: 12px;
        }

        .footer-links a {
            font-size: 14px;
            color: #cbd5e0;
        }

        .footer-links a:hover {
            color: var(--secondary-color);
        }

        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #2d3748;
            font-size: 13px;
        }

        /* Floating Elements */
        .floating-customer {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 10px;
        }

        .float-btn {
            width: 50px;
            height: 50px;
            background: var(--primary-color);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            box-shadow: 0 4px 12px rgba(0,0,0,0.2);
            cursor: pointer;
            transition: transform 0.3s;
        }

        .float-btn:hover {
            transform: scale(1.1);
        }

        .qr-popup {
            position: absolute;
            bottom: 60px;
            right: 0;
            background: white;
            padding: 10px;
            border-radius: 8px;
            box-shadow: 0 4px 16px rgba(0,0,0,0.15);
            display: none;
            width: 150px;
        }

        .qr-popup.show {
            display: block;
        }

        .qr-popup img {
            width: 100%;
            border-radius: 4px;
        }

        /* Responsive */
        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background: white;
                flex-direction: column;
                padding: 20px;
                box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            }

            .nav-menu.active {
                display: flex;
            }

            .mobile-toggle {
                display: block;
            }

            h1 {
                font-size: 28px;
            }

            .hero {
                padding: 60px 0;
            }

            .btn {
                display: block;
                width: 100%;
                margin: 10px 0;
            }

            .btn-outline {
                margin-left: 0;
            }

            .comparison-table {
                font-size: 12px;
            }
            
            .form-container {
                padding: 20px;
            }
        }
        
        /* Utility */
        .text-center { text-align: center; }
        .mb-4 { margin-bottom: 1.5rem; }
        .mt-4 { margin-top: 1.5rem; }
        .flex-center { display: flex; justify-content: center; align-items: center; }