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

:root {
    --cheng-primary: #2563eb;
    --cheng-primary-dark: #1d4ed8;
    --cheng-secondary: #7c3aed;
    --cheng-accent: #06b6d4;
    --cheng-success: #10b981;
    --cheng-warning: #f59e0b;
    --cheng-error: #ef4444;
    --cheng-gray-50: #f9fafb;
    --cheng-gray-100: #f3f4f6;
    --cheng-gray-200: #e5e7eb;
    --cheng-gray-300: #d1d5db;
    --cheng-gray-400: #9ca3af;
    --cheng-gray-500: #6b7280;
    --cheng-gray-600: #4b5563;
    --cheng-gray-700: #374151;
    --cheng-gray-800: #1f2937;
    --cheng-gray-900: #111827;
    --cheng-white: #ffffff;
    --cheng-black: #000000;
    --cheng-gradient-primary: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
    --cheng-gradient-secondary: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
    --cheng-gradient-dark: linear-gradient(135deg, #1f2937 0%, #374151 100%);
    --cheng-shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --cheng-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --cheng-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --cheng-shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --cheng-shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--cheng-gray-800);
    background-color: var(--cheng-white);
    overflow-x: hidden;
}

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

.cheng-cookies-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--cheng-gradient-primary);
    color: var(--cheng-white);
    padding: 16px 24px;
    z-index: 1000;
    transform: translateY(100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.cheng-cookies-banner.show {
    transform: translateY(0);
}

.cheng-cookies-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}

.cheng-cookies-accept {
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--cheng-white);
    padding: 8px 20px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
}

.cheng-cookies-accept:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-1px);
}

.cheng-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    z-index: 100;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.cheng-header.cheng-header-scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--cheng-shadow-lg);
}

.cheng-nav {
    padding: 16px 0;
}

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

.company-logo {
    display: flex;
    align-items: center;

    img {
        margin-right: 10px;
        width: 40px;
    }

    span {
        font-weight: 600;
        font-size: 1.2rem;
    }
}

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

.cheng-nav-menu a {
    text-decoration: none;
    color: var(--cheng-gray-700);
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
    padding: 8px 0;
}

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

.cheng-nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--cheng-gradient-primary);
    transition: width 0.3s ease;
}

.cheng-nav-menu a:hover::after,
.cheng-nav-menu a.cheng-active::after {
    width: 100%;
}

.cheng-mobile-menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.cheng-mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--cheng-gray-700);
    transition: all 0.3s ease;
}

.cheng-hero {
    position: relative;
    margin-top: 92px;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: var(--cheng-gradient-dark);
    overflow: hidden;
}

.cheng-hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1) 0%, rgba(124, 58, 237, 0.1) 100%);
}

.cheng-hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 20%, rgba(37, 99, 235, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 70% 80%, rgba(124, 58, 237, 0.1) 0%, transparent 50%);
}

.cheng-hero-content {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 120px 24px;
}

.cheng-hero-text {
    color: var(--cheng-white);
}

.cheng-hero-title {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
}

.cheng-hero-line {
    display: block;
    background: linear-gradient(135deg, #ffffff 0%, #e0e7ff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.cheng-hero-subtitle {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 48px;
    line-height: 1.6;
}

.cheng-hero-stats {
    display: flex;
    gap: 48px;
    margin-bottom: 48px;
}

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

.cheng-stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--cheng-accent);
    line-height: 1;
}

.cheng-stat-label {
    display: block;
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.7);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: 4px;
}

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

.cheng-btn {
    padding: 16px 32px;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
}

.cheng-btn-primary {
    background: var(--cheng-gradient-primary);
    color: var(--cheng-white);
    box-shadow: var(--cheng-shadow-xl);
}

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

.cheng-btn-outline {
    background: transparent;
    color: var(--cheng-white);
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.cheng-btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-2px);
}

.cheng-hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.cheng-hero-visual img {
    max-width: 100%;
    height: auto;
    border-radius: 16px;
    box-shadow: var(--cheng-shadow-2xl);
}

.cheng-features {
    padding: 120px 0;
    background: var(--cheng-gray-50);
}

.cheng-features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 48px;
}

.cheng-feature-card {
    background: var(--cheng-white);
    padding: 48px 32px;
    border-radius: 16px;
    text-align: center;
    box-shadow: var(--cheng-shadow);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--cheng-gray-100);
}

.cheng-feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--cheng-shadow-2xl);
}

.cheng-feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 16px;
}

.cheng-feature-icon img {
    width: 48px;
    height: 48px;
}

.cheng-feature-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--cheng-gray-900);
}

.cheng-feature-card p {
    color: var(--cheng-gray-600);
    line-height: 1.6;
}

.cheng-services {
    padding: 120px 0;
    background: var(--cheng-white);
}

.cheng-section-header {
    text-align: center;
    margin-bottom: 80px;
}

.cheng-section-title {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 16px;
    color: var(--cheng-gray-900);
}

.cheng-section-subtitle {
    font-size: 1.25rem;
    color: var(--cheng-gray-600);
    max-width: 600px;
    margin: 0 auto;
}

.cheng-services-grid {
    display: flex;
    flex-direction: column;
    gap: 80px;
}

.cheng-service-item {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.cheng-service-reverse {
    direction: rtl;
}

.cheng-service-reverse>* {
    direction: ltr;
}

.cheng-service-image {
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--cheng-shadow-xl);
}

.cheng-service-image img {
    width: 100%;
    height: auto;
    display: block;
}

.cheng-service-content h3 {
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--cheng-gray-900);
}

.cheng-service-content p {
    font-size: 1.125rem;
    color: var(--cheng-gray-600);
    margin-bottom: 32px;
    line-height: 1.6;
}

.cheng-service-link {
    color: var(--cheng-primary);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.125rem;
    transition: color 0.3s ease;
}

.cheng-service-link:hover {
    color: var(--cheng-primary-dark);
}

.cheng-products {
    padding: 120px 0;
    background: var(--cheng-gradient-dark);
    color: var(--cheng-white);
}

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

.cheng-products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 32px;
}

.cheng-product-category {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    aspect-ratio: 4/3;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    text-decoration: none;
    display: block;
}

.cheng-product-category:hover {
    transform: translateY(-8px);
}

.cheng-product-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom, transparent 0%, rgba(0, 0, 0, 0.7) 100%);
    z-index: 1;
}

.cheng-product-category img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.cheng-product-info {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 32px;
    z-index: 2;
}

.cheng-product-info h3 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--cheng-white);
}

.cheng-product-info p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 1rem;
}

.cheng-testimonials {
    padding: 120px 0;
    background: var(--cheng-gray-50);
}

.cheng-testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: 48px;
}

.cheng-testimonial-card {
    background: var(--cheng-white);
    padding: 48px;
    border-radius: 16px;
    box-shadow: var(--cheng-shadow);
    border: 1px solid var(--cheng-gray-100);
}

.cheng-testimonial-content p {
    font-size: 1.25rem;
    color: var(--cheng-gray-700);
    margin-bottom: 32px;
    line-height: 1.6;
    font-style: italic;
}

.cheng-testimonial-author {
    display: flex;
    align-items: center;
    gap: 16px;
}

.cheng-testimonial-author img {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
}

.cheng-author-info h4 {
    font-weight: 600;
    color: var(--cheng-gray-900);
    margin-bottom: 4px;
}

.cheng-author-info span {
    color: var(--cheng-gray-600);
    font-size: 0.875rem;
}

.cheng-cta {
    padding: 120px 0;
    background: var(--cheng-gradient-primary);
    color: var(--cheng-white);
    text-align: center;
}

.cheng-cta-content h2 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 24px;
}

.cheng-cta-content p {
    font-size: 1.25rem;
    margin-bottom: 48px;
    opacity: 0.9;
}

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

.cheng-footer {
    background: var(--cheng-gray-900);
    color: var(--cheng-white);
    padding: 80px 0 32px;
}

.cheng-footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 48px;
    margin-bottom: 48px;
}

.cheng-footer-section h4 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 24px;
    color: var(--cheng-white);
}

.cheng-footer-section p {
    color: var(--cheng-gray-400);
    margin-bottom: 12px;
}

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

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

.cheng-footer-section ul li a {
    color: var(--cheng-gray-400);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.cheng-footer-bottom {
    border-top: 1px solid var(--cheng-gray-800);
    padding-top: 32px;
    text-align: center;
    color: var(--cheng-gray-500);
}

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

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

    .cheng-hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        padding: 80px 24px;
    }

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

    .cheng-hero-stats {
        justify-content: center;
    }

    .cheng-hero-actions {
        justify-content: center;
        flex-wrap: wrap;
    }

    .cheng-service-item {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .cheng-service-reverse {
        direction: ltr;
    }

    .cheng-testimonials-grid {
        grid-template-columns: 1fr;
    }

    .cheng-cta-actions {
        flex-direction: column;
        align-items: center;
    }

    .cheng-footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}