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

:root {
    --color-primary: #0066cc;
    --color-primary-dark: #004499;
    --color-primary-light: #3385d6;
    --color-accent: #ff6600;
    --color-text: #1a1a1a;
    --color-text-secondary: #4a5568;
    --color-text-muted: #718096;
    --color-border: #e2e8f0;
    --color-bg: #ffffff;
    --color-bg-alt: #f7fafc;
    --color-bg-dark: #1a202c;
    --color-bg-hover: #edf2f7;
    --spacing-unit: 1rem;
    --max-width: 1280px;
    --header-height: 80px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* Header */
.header {
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 0;
    gap: 24px;
}

.logo-link {
    text-decoration: none;
    color: var(--color-text);
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: -0.02em;
}

.nav {
    display: flex;
    gap: 32px;
    align-items: center;
    flex: 1;
    justify-content: center;
}

.nav-link {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9375rem;
    transition: color 0.2s;
    padding: 4px 0;
    border-bottom: 2px solid transparent;
    white-space: nowrap;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}

.header-actions {
    display: flex;
    gap: 12px;
    align-items: center;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--color-text);
    transition: all 0.3s;
}

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

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

.btn {
    display: inline-block;
    padding: 10px 20px;
    text-decoration: none;
    border-radius: 6px;
    font-weight: 500;
    font-size: 0.9375rem;
    transition: all 0.2s;
    border: 1px solid transparent;
    cursor: pointer;
    text-align: center;
    white-space: nowrap;
}

.btn-primary-small {
    background-color: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

.btn-primary-small:hover {
    background-color: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
}

.btn-secondary-small {
    background-color: var(--color-bg);
    color: var(--color-text);
    border-color: var(--color-border);
}

.btn-secondary-small:hover {
    background-color: var(--color-bg-hover);
    border-color: var(--color-text-muted);
}

.btn-primary-large {
    background-color: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
    padding: 16px 32px;
    font-size: 1.0625rem;
    font-weight: 600;
}

.btn-primary-large:hover {
    background-color: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 102, 204, 0.3);
}

.btn-secondary-large {
    background-color: rgba(255, 255, 255, 0.95);
    color: var(--color-text);
    border-color: rgba(255, 255, 255, 0.5);
    padding: 16px 32px;
    font-size: 1.0625rem;
    font-weight: 600;
}

.btn-secondary-large:hover {
    background-color: white;
    border-color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 600px;
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, #0066cc 0%, #004499 100%);
    z-index: -2;
}

.hero-background::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    z-index: -1;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
    z-index: -1;
}

.hero-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 24px;
    color: white;
    letter-spacing: -0.02em;
    line-height: 1.2;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 40px;
    color: rgba(255, 255, 255, 0.95);
    line-height: 1.7;
}

.hero-subtitle strong {
    color: white;
    font-weight: 600;
}

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

/* Sections */
.section {
    padding: 80px 0;
    background-color: var(--color-bg);
}

.section-alt {
    background-color: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.section-title {
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 48px;
    color: var(--color-text);
    letter-spacing: -0.02em;
    text-align: center;
}

/* Benefits Grid */
.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 32px;
}

.benefit-card {
    background: var(--color-bg);
    padding: 32px;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    transition: all 0.3s;
    text-align: center;
}

.benefit-card:hover {
    border-color: var(--color-primary);
    box-shadow: 0 8px 24px rgba(0, 102, 204, 0.15);
    transform: translateY(-4px);
}

.benefit-icon {
    font-size: 3rem;
    margin-bottom: 16px;
    display: block;
}

.benefit-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--color-text);
}

.benefit-text {
    font-size: 1rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* Industries Grid */
.industries-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.industry-card {
    background: var(--color-bg);
    padding: 32px;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    transition: all 0.3s;
}

.industry-card:hover {
    border-color: var(--color-primary);
    box-shadow: 0 8px 24px rgba(0, 102, 204, 0.15);
    transform: translateY(-4px);
}

.industry-icon {
    font-size: 3rem;
    margin-bottom: 16px;
    display: block;
}

.industry-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--color-text);
}

.industry-text {
    font-size: 1rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 16px;
}

.industry-link {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9375rem;
    transition: color 0.2s;
}

.industry-link:hover {
    color: var(--color-primary-dark);
    text-decoration: underline;
}

/* Knowledge Base (Formerly Products) */
.products-wrapper {
    display: block;
    width: 100%;
}

.products-filters {
    background: var(--color-bg);
    padding: 24px;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    position: sticky;
    top: calc(var(--header-height) + 24px);
}

.filters-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 24px;
    color: var(--color-text);
}

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

.filter-group:last-child {
    margin-bottom: 0;
}

.filter-label {
    font-size: 0.9375rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--color-text);
    display: block;
}

.filter-checkbox {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
    cursor: pointer;
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
}

.filter-checkbox input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.product-card {
    background: var(--color-bg);
    padding: 24px;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    transition: all 0.3s;
}

.product-card:hover {
    border-color: var(--color-primary);
    box-shadow: 0 8px 24px rgba(0, 102, 204, 0.15);
    transform: translateY(-4px);
}

.product-card.hidden {
    display: none;
}

.product-image {
    font-size: 3rem;
    margin-bottom: 16px;
    display: block;
}

.product-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--color-text);
}

.product-specs {
    font-size: 0.875rem;
    color: var(--color-primary);
    font-weight: 500;
    margin-bottom: 12px;
}

.product-description {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 16px;
}

.product-link {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9375rem;
    transition: color 0.2s;
}

.product-link:hover {
    color: var(--color-primary-dark);
    text-decoration: underline;
}

.no-results-message {
    grid-column: 1 / -1;
    text-align: center;
    padding: 48px 24px;
    color: var(--color-text-secondary);
    font-size: 1.125rem;
    background: var(--color-bg-alt);
    border-radius: 8px;
    border: 1px dashed var(--color-border);
}

/* Cases Grid */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
}

.case-card {
    background: var(--color-bg);
    padding: 32px;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    transition: all 0.3s;
}

.case-card:hover {
    border-color: var(--color-primary);
    box-shadow: 0 8px 24px rgba(0, 102, 204, 0.15);
    transform: translateY(-4px);
}

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

.case-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--color-text);
}

.case-text {
    font-size: 1rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 16px;
}

.case-link {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9375rem;
    transition: color 0.2s;
}

.case-link:hover {
    color: var(--color-primary-dark);
    text-decoration: underline;
}

/* Tech Grid */
.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 32px;
}

.tech-card {
    background: var(--color-bg);
    padding: 32px;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    transition: all 0.3s;
    text-align: center;
}

.tech-card:hover {
    border-color: var(--color-primary);
    box-shadow: 0 8px 24px rgba(0, 102, 204, 0.15);
    transform: translateY(-4px);
}

.tech-icon {
    font-size: 3rem;
    margin-bottom: 16px;
    display: block;
}

.tech-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--color-text);
}

.tech-text {
    font-size: 1rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* CTA Section */
.cta-section {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    padding: 80px 0;
    color: white;
}

.cta-content {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.cta-title {
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: white;
    letter-spacing: -0.02em;
}

.cta-text {
    font-size: 1.25rem;
    margin-bottom: 32px;
    color: rgba(255, 255, 255, 0.95);
    line-height: 1.7;
}

.cta-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* Testimonials Grid */
.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
}

.testimonial-card {
    background: var(--color-bg);
    padding: 32px;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    transition: all 0.3s;
}

.testimonial-card:hover {
    border-color: var(--color-primary);
    box-shadow: 0 8px 24px rgba(0, 102, 204, 0.15);
}

.testimonial-avatar {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--color-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.25rem;
    margin-bottom: 16px;
}

.testimonial-text {
    font-size: 1rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.testimonial-author strong {
    color: var(--color-text);
    font-weight: 600;
}

.testimonial-author span {
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

/* Footer */
.footer {
    background-color: var(--color-bg-dark);
    color: rgba(255, 255, 255, 0.8);
    padding: 64px 0 32px;
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: 48px;
}

.footer-main {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 48px;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
}

.footer-slogan {
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.7);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 32px;
}

.footer-column {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-title {
    font-size: 1rem;
    font-weight: 600;
    color: white;
    margin-bottom: 4px;
}

.footer-link {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 0.9375rem;
    transition: color 0.2s;
}

.footer-link:hover {
    color: white;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 24px;
    padding-top: 32px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-contacts {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.footer-contact {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color 0.2s;
}

.footer-contact:hover {
    color: white;
}

.footer-social {
    display: flex;
    gap: 16px;
    align-items: center;
}

.social-link {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

.social-link:hover {
    color: white;
}

.footer-actions {
    display: flex;
    gap: 16px;
}

.footer-copyright {
    color: rgba(255, 255, 255, 0.4);
    font-size: 0.875rem;
    text-align: center;
    width: 100%;
}

/* Mobile Responsive */
@media (max-width: 992px) {
    .header-content {
        padding: 16px 24px;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .footer-main {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav {
        display: none;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-actions,
    .cta-actions {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }

    .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
    }

    .footer-actions {
        width: 100%;
        flex-direction: column;
    }
}