/* Reset and Base */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        :root {
            --primary: #1e293b;
            --secondary: #64748b;
            --accent: #0f172a;
            --light: #f8fafc;
            --white: #ffffff;
            --border: #e2e8f0;
            --text-primary: #0f172a;
            --text-secondary: #64748b;
            --transition: all 0.2s ease;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
            line-height: 1.6;
            color: var(--text-primary);
            background: var(--white);
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Typography */
        h1, h2, h3, h4, h5, h6 {
            font-weight: 600;
            line-height: 1.2;
            margin-bottom: 1rem;
        }

        h1 { font-size: 3rem; }
        h2 { font-size: 2.5rem; }
        h3 { font-size: 1.5rem; }

        p {
            color: var(--text-secondary);
            margin-bottom: 1rem;
        }

        /* Header */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border);
            z-index: 1000;
            transition: var(--transition);
        }

        .nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
        }

        .nav-logo {
            font-size: 1.25rem;
            font-weight: 600;
            color: var(--primary);
        }

        .nav-menu {
            display: flex;
            list-style: none;
            gap: 40px;
        }

        .nav-link {
            text-decoration: none;
            color: var(--text-primary);
            font-weight: 400;
            font-size: 0.95rem;
            transition: var(--transition);
            position: relative;
        }

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

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--primary);
        }

        .hamburger {
            display: none;
            flex-direction: column;
            cursor: pointer;
            gap: 4px;
        }

        .hamburger span {
            width: 24px;
            height: 2px;
            background: var(--primary);
            transition: var(--transition);
        }

        /* Hero Section */
        .hero {
            padding: 160px 0 120px;
            background: var(--white);
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: 
                /* Изометрические кубы */
                linear-gradient(30deg, transparent 40%, rgba(30, 41, 59, 0.06) 40%, rgba(30, 41, 59, 0.06) 60%, transparent 60%),
                linear-gradient(150deg, transparent 40%, rgba(30, 41, 59, 0.04) 40%, rgba(30, 41, 59, 0.04) 60%, transparent 60%),
                linear-gradient(90deg, transparent 40%, rgba(30, 41, 59, 0.03) 40%, rgba(30, 41, 59, 0.03) 60%, transparent 60%),
                /* Технологическая сетка */
                linear-gradient(rgba(30, 41, 59, 0.02) 1px, transparent 1px),
                linear-gradient(90deg, rgba(30, 41, 59, 0.02) 1px, transparent 1px);
            background-size: 
                200px 200px,
                200px 200px, 
                200px 200px,
                40px 40px,
                40px 40px;
            background-position: 
                0 0,
                100px 100px,
                50px 50px,
                0 0,
                0 0;
            z-index: 1;
        }

        .hero::after {
            content: '';
            position: absolute;
            top: 10%;
            right: -10%;
            width: 500px;
            height: 500px;
            background: 
                /* Абстрактные геометрические формы */
                conic-gradient(from 45deg at 30% 30%, transparent 0deg, rgba(30, 41, 59, 0.03) 90deg, transparent 180deg),
                radial-gradient(ellipse at 70% 70%, rgba(30, 41, 59, 0.02) 0%, transparent 70%);
            transform: rotate(-15deg);
            border-radius: 20% 80% 30% 70%;
            z-index: 1;
        }

        .hero .container {
            position: relative;
            z-index: 2;
        }

        .hero-content {
            max-width: 800px;
            margin: 0 auto;
            text-align: center;
        }

        .hero-title {
            color: var(--text-primary);
            margin-bottom: 24px;
            font-weight: 700;
        }

        .hero-subtitle {
            font-size: 1.25rem;
            color: var(--text-secondary);
            margin-bottom: 40px;
            font-weight: 400;
        }

.hero-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 48px;
    max-width: 800px;
    margin: 0 auto 48px auto;
    /*text-align: justify;*/
}

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

        .btn {
            padding: 16px 32px;
            border: 2px solid var(--primary);
            background: var(--primary);
            color: var(--white);
            text-decoration: none;
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--transition);
            cursor: pointer;
            border: none;
        }

        .btn:hover {
            background: var(--accent);
        }

        .btn-secondary {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }

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

        /* Section Styles */
        .section {
            padding: 120px 0;
        }

        .section-alt {
            background: var(--light);
        }

        .section-header {
            text-align: center;
            margin-bottom: 80px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        .section-title {
            color: var(--text-primary);
            margin-bottom: 16px;
        }

        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-secondary);
        }

        /* Services */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 32px;
        }

        .service-card {
            background: var(--white);
            padding: 48px 32px;
            border: 1px solid var(--border);
            transition: var(--transition);
        }

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

        .service-icon {
            width: 48px;
            height: 48px;
            background: var(--primary);
            color: var(--white);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 24px;
            font-size: 20px;
        }

        .service-card h3 {
            color: var(--text-primary);
            margin-bottom: 16px;
        }

        .service-card p {
            margin-bottom: 24px;
        }

        .service-features {
            list-style: none;
        }

        .service-features li {
            color: var(--text-secondary);
            padding: 8px 0;
            padding-left: 24px;
            position: relative;
            font-size: 0.95rem;
        }

        .service-features li::before {
            content: '•';
            position: absolute;
            left: 0;
            color: var(--primary);
            font-weight: bold;
        }

        /* Solutions */
        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
            gap: 48px;
            margin-bottom: 80px;
        }

        .solutions-slider {
            position: relative;
            margin-top: 40px;
        }

        .solutions-container {
            position: relative;
            overflow: hidden;
        }

        .solution-slide {
            display: none;
            opacity: 0;
            transition: opacity 0.5s ease;
        }

        .solution-slide.active {
            display: block;
            opacity: 1;
        }

        .solutions-controls {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 24px;
            margin-top: 32px;
        }

        .solutions-btn {
            background: var(--primary);
            color: var(--white);
            border: none;
            width: 40px;
            height: 40px;
            cursor: pointer;
            transition: var(--transition);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
        }

        .solutions-btn:hover {
            background: var(--accent);
        }

        .solutions-dots {
            display: flex;
            gap: 12px;
        }

        .solution-dot {
            width: 8px;
            height: 8px;
            background: var(--border);
            cursor: pointer;
            transition: var(--transition);
        }

        .solution-dot.active {
            background: var(--primary);
        }

        .solution-card {
            background: var(--white);
            padding: 48px;
            border: 1px solid var(--border);
            transition: var(--transition);
        }

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

        .solution-header {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-bottom: 24px;
        }

        .solution-icon {
            width: 40px;
            height: 40px;
            background: var(--primary);
            color: var(--white);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
        }

        .solution-badge {
            padding: 4px 12px;
            background: var(--light);
            color: var(--text-secondary);
            font-size: 0.8rem;
            font-weight: 500;
            margin-left: auto;
        }

        .solution-badge.published {
            background: var(--primary);
            color: var(--white);
        }

        .solution-description {
            margin-bottom: 24px;
        }

        .solution-features {
            list-style: none;
            margin-bottom: 32px;
        }

        .solution-features li {
            color: var(--text-secondary);
            padding: 6px 0;
            padding-left: 20px;
            position: relative;
            font-size: 0.95rem;
        }

        .solution-features li::before {
            content: '•';
            position: absolute;
            left: 0;
            color: var(--primary);
        }

        .solution-stats {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
            padding-top: 24px;
            border-top: 1px solid var(--border);
        }

        .stat-item {
            text-align: center;
        }

        .stat-number {
            display: block;
            font-size: 1.5rem;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 4px;
        }

        .stat-label {
            font-size: 0.85rem;
            color: var(--text-secondary);
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        /* Experience */
        .experience-grid {
            display: grid;
            gap: 32px;
            margin-bottom: 80px;
        }

        .experience-slider {
            position: relative;
            margin-top: 40px;
        }

        .slider-container {
            position: relative;
            overflow: hidden;
        }

        .slide {
            display: none;
            opacity: 0;
            transition: opacity 0.5s ease;
        }

        .slide.active {
            display: block;
            opacity: 1;
        }

        .slider-controls {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 24px;
            margin-top: 32px;
        }

        .slider-btn {
            background: var(--primary);
            color: var(--white);
            border: none;
            width: 40px;
            height: 40px;
            cursor: pointer;
            transition: var(--transition);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
        }

        .slider-btn:hover {
            background: var(--accent);
        }

        .slider-dots {
            display: flex;
            gap: 12px;
        }

        .dot {
            width: 8px;
            height: 8px;
            background: var(--border);
            cursor: pointer;
            transition: var(--transition);
        }

        .dot.active {
            background: var(--primary);
        }

        .project-card {
            background: var(--white);
            padding: 48px;
            border: 1px solid var(--border);
            transition: var(--transition);
        }

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

        .project-header {
            margin-bottom: 24px;
        }

        .project-type {
            color: var(--primary);
            font-size: 0.9rem;
            font-weight: 500;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 8px;
        }

        .project-title {
            color: var(--text-primary);
            font-size: 1.5rem;
            margin-bottom: 16px;
        }

        .project-results {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
            gap: 24px;
            margin-top: 32px;
            padding-top: 32px;
            border-top: 1px solid var(--border);
        }

        .result-item {
            text-align: center;
        }

        .result-number {
            display: block;
            font-size: 1.8rem;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 4px;
        }

        .result-text {
            font-size: 0.85rem;
            color: var(--text-secondary);
        }

        /* Principles */
        .principles-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 32px;
        }

        .principle-card {
            background: var(--white);
            padding: 40px 32px;
            border: 1px solid var(--border);
            text-align: center;
            transition: var(--transition);
        }

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

        .principle-icon {
            width: 56px;
            height: 56px;
            background: var(--primary);
            color: var(--white);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 24px;
            font-size: 24px;
        }

        /* Partners */
        .partners-grid {
            display: flex;
            justify-content: center;
        }

        .partner-card {
            background: var(--white);
            padding: 64px 48px;
            border: 1px solid var(--border);
            text-align: center;
            max-width: 500px;
            transition: var(--transition);
        }

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

        .partner-logo {
            width: 80px;
            height: 80px;
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 32px;
        }

        .partner-logo img {
            width: 60px;
            height: auto;
            filter: brightness(0) invert(1);
        }

        .partner-card h3 {
            color: var(--text-primary);
            margin-bottom: 16px;
        }

        .partner-badges {
            display: flex;
            justify-content: center;
            gap: 12px;
            margin-top: 24px;
        }

        .badge {
            background: var(--primary);
            color: var(--white);
            padding: 8px 16px;
            font-size: 0.85rem;
            font-weight: 500;
        }

        /* Contact */
        .contact {
            background: var(--accent);
            color: var(--white);
        }

        .contact .section-title,
        .contact .section-subtitle {
            color: var(--white);
        }

        .contact-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 80px;
            align-items: start;
        }

        .contact-info h3 {
            color: var(--white);
            margin-bottom: 16px;
        }

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

        .contact-item {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-bottom: 24px;
        }

        .contact-item i {
            width: 24px;
            color: var(--white);
        }

        .contact-form {
            background: rgba(255, 255, 255, 0.05);
            padding: 48px;
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        .form-group {
            margin-bottom: 24px;
        }

        .form-group label {
            display: block;
            color: var(--white);
            margin-bottom: 8px;
            font-weight: 500;
        }

        .form-group input,
        .form-group select,
        .form-group textarea {
            width: 100%;
            padding: 16px;
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: var(--white);
            font-family: inherit;
            transition: var(--transition);
        }

        .form-group input:focus,
        .form-group select:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: var(--white);
            background: rgba(255, 255, 255, 0.15);
        }

        .form-group input::placeholder,
        .form-group textarea::placeholder {
            color: rgba(255, 255, 255, 0.6);
        }

        .form-group select {
            appearance: none;
            background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='2'%3e%3cpolyline points='6,9 12,15 18,9'%3e%3c/polyline%3e%3c/svg%3e");
            background-repeat: no-repeat;
            background-position: right 16px center;
            background-size: 16px;
        }

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

        .contact .btn {
            background: var(--white);
            color: var(--accent);
            border: 2px solid var(--white);
        }

        .contact .btn:hover {
            background: transparent;
            color: var(--white);
        }

        /* Success Message */
        .success-message {
            background: rgba(255, 255, 255, 0.05);
            padding: 48px;
            border: 1px solid rgba(255, 255, 255, 0.1);
            text-align: center;
            opacity: 0;
            transform: translateY(20px);
            transition: all 0.6s ease;
        }

        .success-message.visible {
            opacity: 1;
            transform: translateY(0);
        }

        .success-message h3 {
            color: var(--white);
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 16px;
            letter-spacing: 1px;
        }

        .success-message p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 1.1rem;
            margin-bottom: 0;
        }

        /* Footer */
        .footer {
            background: var(--primary);
            color: var(--white);
            padding: 80px 0 32px;
        }

        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 48px;
            margin-bottom: 48px;
        }

        .footer-section h4 {
            color: var(--white);
            margin-bottom: 24px;
        }

        .footer-section ul {
            list-style: none;
        }

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

        .footer-section ul li a {
            color: rgba(255, 255, 255, 0.8);
            text-decoration: none;
            transition: var(--transition);
        }

        .footer-section ul li a:hover {
            color: var(--white);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 32px;
            text-align: center;
            color: rgba(255, 255, 255, 0.6);
        }

        /* Responsive */
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }

            .nav-menu {
                position: fixed;
                top: 81px;
                left: -100%;
                width: 100%;
                height: calc(100vh - 81px);
                background: var(--white);
                flex-direction: column;
                justify-content: start;
                align-items: center;
                padding-top: 48px;
                border-top: 1px solid var(--border);
                transition: left 0.3s ease;
            }

            .nav-menu.active {
                left: 0;
            }

            .hamburger {
                display: flex;
            }

            .hamburger.active span:nth-child(1) {
                transform: rotate(-45deg) translate(-5px, 6px);
            }

            .hamburger.active span:nth-child(2) {
                opacity: 0;
            }

            .hamburger.active span:nth-child(3) {
                transform: rotate(45deg) translate(-5px, -6px);
            }

            h1 { font-size: 2.5rem; }
            h2 { font-size: 2rem; }

            .section {
                padding: 80px 0;
            }

            .hero {
                padding: 120px 0 80px;
            }

            .hero-buttons {
                flex-direction: column;
                align-items: flex-start;
            }

            .contact-content {
                grid-template-columns: 1fr;
                gap: 48px;
            }

            .services-grid,
            .solutions-grid,
            .principles-grid {
                grid-template-columns: 1fr;
            }

            .solution-card {
                padding: 32px 24px;
            }

            .contact-form {
                padding: 32px 24px;
            }
        }

        @media (max-width: 480px) {
            h1 { font-size: 2rem; }
            
            .service-card,
            .principle-card,
            .project-card {
                padding: 32px 24px;
            }

            .partner-card {
                padding: 48px 32px;
            }
        }

        /* Loading and animations */
        .fade-in {
            opacity: 0;
            transform: translateY(20px);
            transition: all 0.6s ease;
        }

        .fade-in.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* Focus styles */
        .btn:focus,
        .nav-link:focus,
        input:focus,
        textarea:focus,
        select:focus {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }