:root {
            --primary: #1a365d;
            --primary-light: #2c5282;
            --accent: #e53e3e;
            --accent-light: #fc8181;
            --bg-light: #f7fafc;
            --text-dark: #1a202c;
            --text-medium: #4a5568;
            --text-light: #718096;
            --border: #e2e8f0;
            --white: #ffffff;
            --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
            color: var(--text-dark);
            line-height: 1.6;
            overflow-x: hidden;
        }

        /* Navigation */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            background: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(10px);
            z-index: 1000;
            border-bottom: 1px solid var(--border);
            transition: box-shadow 0.3s ease;
        }

        .navbar.scrolled {
            box-shadow: var(--shadow);
        }

        .nav-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }

        .nav-logo {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary);
            text-decoration: none;
            letter-spacing: -0.5px;
        }

        .nav-logo span {
            color: var(--accent);
        }

        .nav-links {
            display: flex;
            gap: 32px;
            list-style: none;
        }

        .nav-links a {
            text-decoration: none;
            color: var(--text-medium);
            font-weight: 500;
            font-size: 0.9rem;
            transition: color 0.2s;
        }

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

        .nav-cta {
            background: var(--primary);
            color: var(--white) !important;
            padding: 10px 20px;
            border-radius: 6px;
            transition: background 0.2s !important;
        }

        .nav-cta:hover {
            background: var(--primary-light) !important;
        }

        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: var(--text-dark);
        }

        /* Hero Section */
        .hero {
            padding: 140px 24px 80px;
            background: linear-gradient(135deg, #1a365d 0%, #2c5282 50%, #2b6cb0 100%);
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
        }

        .hero-content {
            max-width: 1200px;
            margin: 0 auto;
            position: relative;
            z-index: 1;
        }

        .hero-badge {
            display: inline-block;
            background: rgba(255, 255, 255, 0.15);
            color: var(--white);
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 24px;
            border: 1px solid rgba(255, 255, 255, 0.2);
        }

        .hero h1 {
            font-size: 3.2rem;
            font-weight: 800;
            color: var(--white);
            line-height: 1.15;
            margin-bottom: 20px;
            max-width: 700px;
        }

        .hero p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 600px;
            margin-bottom: 36px;
            line-height: 1.7;
        }

        .hero-buttons {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .btn-primary {
            background: var(--white);
            color: var(--primary);
            padding: 14px 28px;
            border-radius: 8px;
            text-decoration: none;
            font-weight: 600;
            font-size: 0.95rem;
            transition: transform 0.2s, box-shadow 0.2s;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-lg);
        }

        .btn-secondary {
            background: transparent;
            color: var(--white);
            padding: 14px 28px;
            border-radius: 8px;
            text-decoration: none;
            font-weight: 600;
            font-size: 0.95rem;
            border: 2px solid rgba(255, 255, 255, 0.4);
            transition: all 0.2s;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.7);
        }

        .hero-stats {
            display: flex;
            gap: 48px;
            margin-top: 60px;
            padding-top: 40px;
            border-top: 1px solid rgba(255, 255, 255, 0.15);
        }

        .stat-item h3 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--white);
        }

        .stat-item p {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 0;
        }

        /* Section Styles */
        section {
            padding: 80px 24px;
        }

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

        .section-header {
            text-align: center;
            margin-bottom: 56px;
        }

        .section-header h2 {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 12px;
        }

        .section-header p {
            font-size: 1.05rem;
            color: var(--text-light);
            max-width: 600px;
            margin: 0 auto;
        }

        .section-label {
            display: inline-block;
            color: var(--accent);
            font-weight: 600;
            font-size: 0.85rem;
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 8px;
        }

        /* About Section */
        #about {
            background: var(--bg-light);
        }

        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }

        .about-content h3 {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--primary);
        }

        .about-content p {
            color: var(--text-medium);
            margin-bottom: 16px;
            font-size: 0.95rem;
        }

        .about-highlights {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
            margin-top: 24px;
        }

        .highlight-item {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.9rem;
            color: var(--text-medium);
        }

        .highlight-item .icon {
            width: 24px;
            height: 24px;
            background: rgba(229, 62, 62, 0.1);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            font-size: 0.75rem;
            flex-shrink: 0;
        }

        .about-map {
            background: var(--white);
            border-radius: 16px;
            padding: 40px;
            box-shadow: var(--shadow);
            text-align: center;
        }

        .map-placeholder {
            font-size: 4rem;
            margin-bottom: 16px;
        }

        .map-info h4 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 8px;
        }

        .map-info p {
            color: var(--text-light);
            font-size: 0.9rem;
        }

        /* Advantages Section */
        .advantages-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .advantage-card {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 32px 24px;
            text-align: center;
            transition: transform 0.2s, box-shadow 0.2s;
        }

        .advantage-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }

        .advantage-icon {
            width: 56px;
            height: 56px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-size: 1.5rem;
        }

        .advantage-card h4 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-dark);
        }

        .advantage-card p {
            font-size: 0.85rem;
            color: var(--text-light);
            line-height: 1.6;
        }

        /* Products Section */
        #products {
            background: var(--bg-light);
        }

        .products-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 24px;
        }

        .product-card {
            background: var(--white);
            border-radius: 12px;
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: transform 0.2s;
        }

        .product-card:hover {
            transform: translateY(-4px);
        }

        .product-header {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            padding: 20px 24px;
            color: var(--white);
        }

        .product-header h3 {
            font-size: 1.2rem;
            font-weight: 700;
        }

        .product-header span {
            font-size: 0.8rem;
            opacity: 0.8;
        }

        .product-body {
            padding: 24px;
        }

        .product-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.85rem;
        }

        .product-table th {
            background: var(--bg-light);
            padding: 10px 12px;
            text-align: left;
            font-weight: 600;
            color: var(--text-medium);
            border-bottom: 2px solid var(--border);
        }

        .product-table td {
            padding: 10px 12px;
            border-bottom: 1px solid var(--border);
            color: var(--text-medium);
        }

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

        .product-table td:first-child {
            font-weight: 500;
            color: var(--text-dark);
        }

        /* Other Resins */
        .other-resins-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 16px;
            margin-top: 32px;
        }

        .resin-mini-card {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: 10px;
            padding: 20px;
            transition: border-color 0.2s;
        }

        .resin-mini-card:hover {
            border-color: var(--primary);
        }

        .resin-mini-card h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 6px;
        }

        .resin-mini-card p {
            font-size: 0.8rem;
            color: var(--text-light);
        }

        /* Contact Section */
        #contact {
            background: var(--primary);
            color: var(--white);
        }

        .contact-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
        }

        .contact-info h3 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .contact-info > p {
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 32px;
            font-size: 1rem;
        }

        .contact-details {
            list-style: none;
        }

        .contact-details li {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            margin-bottom: 20px;
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.9);
        }

        .contact-details .contact-icon {
            width: 40px;
            height: 40px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            flex-shrink: 0;
        }

        .contact-form {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 16px;
            padding: 32px;
        }

        .contact-form h4 {
            font-size: 1.2rem;
            margin-bottom: 20px;
        }

        .form-group {
            margin-bottom: 16px;
        }

        .form-group label {
            display: block;
            font-size: 0.85rem;
            margin-bottom: 6px;
            color: rgba(255, 255, 255, 0.8);
        }

        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 12px 16px;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 8px;
            color: var(--white);
            font-size: 0.9rem;
            font-family: inherit;
            transition: border-color 0.2s;
        }

        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: rgba(255, 255, 255, 0.5);
        }

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

        .form-group select option {
            background: var(--primary);
            color: var(--white);
        }

        .form-submit {
            width: 100%;
            padding: 14px;
            background: var(--white);
            color: var(--primary);
            border: none;
            border-radius: 8px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: transform 0.2s, box-shadow 0.2s;
        }

        .form-submit:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-lg);
        }

        /* Footer */
        footer {
            background: #0f2440;
            padding: 32px 24px;
            text-align: center;
        }

        .footer-content {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
        }

        .footer-content p {
            color: rgba(255, 255, 255, 0.5);
            font-size: 0.85rem;
        }

        .footer-links {
            display: flex;
            gap: 24px;
        }

        .footer-links a {
            color: rgba(255, 255, 255, 0.5);
            text-decoration: none;
            font-size: 0.85rem;
            transition: color 0.2s;
        }

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

        /* Responsive */
        @media (max-width: 968px) {
            .nav-links {
                display: none;
            }

            .mobile-menu-btn {
                display: block;
            }

            .hero h1 {
                font-size: 2.2rem;
            }

            .hero-stats {
                gap: 24px;
                flex-wrap: wrap;
            }

            .about-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

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

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

            .contact-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 600px) {
            .hero {
                padding: 120px 20px 60px;
            }

            .hero h1 {
                font-size: 1.8rem;
            }

            .hero p {
                font-size: 1rem;
            }

            .hero-buttons {
                flex-direction: column;
            }

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

            .about-highlights {
                grid-template-columns: 1fr;
            }

            .stat-item h3 {
                font-size: 1.5rem;
            }

            section {
                padding: 60px 20px;
            }

            .section-header h2 {
                font-size: 1.8rem;
            }
        }

        /* Mobile menu */
        .mobile-menu {
            display: none;
            position: fixed;
            top: 72px;
            left: 0;
            right: 0;
            background: var(--white);
            border-bottom: 1px solid var(--border);
            padding: 20px 24px;
            box-shadow: var(--shadow);
            z-index: 999;
        }

        .mobile-menu.active {
            display: block;
        }

        .mobile-menu a {
            display: block;
            padding: 12px 0;
            color: var(--text-medium);
            text-decoration: none;
            font-weight: 500;
            border-bottom: 1px solid var(--border);
        }

        .mobile-menu a:last-child {
            border-bottom: none;
        }