:root {
    --primary-yellow: #FFD700;
    --dark-yellow: #FFC107;
    --anthracite: #2F2F2F;
    --dark-anthracite: #1F1F1F;
    --light-gray: #F5F5F5;
    --white: #FFFFFF;
    --text-dark: #333333;
    --text-light: #666666;
    --border-color: #E0E0E0;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header & Navigation */
.header {
    background: var(--white);
    box-shadow: var(--shadow);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: var(--transition);
}

.nav {
    padding: 1rem 0;
}

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

.logo h2 {
    color: var(--anthracite);
    font-weight: 800;
    font-size: 1.8rem;
    position: relative;
}

.logo h2::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-yellow), var(--dark-yellow));
    border-radius: 2px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--anthracite);
    background-color: var(--light-gray);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 2px;
    background: var(--primary-yellow);
    border-radius: 1px;
}

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

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--anthracite);
    border-radius: 2px;
    transition: var(--transition);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-yellow), var(--dark-yellow));
    color: var(--anthracite);
    box-shadow: 0 4px 15px rgba(255, 215, 0, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 215, 0, 0.4);
}

.btn-secondary {
    background: #fffffffa;
    color: var(--anthracite);
    border: 2px solid var(--anthracite);
}

.btn-secondary:hover {
    background: var(--anthracite);
    color: var(--white);
    transform: translateY(-2px);
}

/* Hero Section */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, var(--light-gray) 0%, var(--white) 100%);
    overflow: hidden;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    min-height: 600px;
}

.hero-text h1 {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--anthracite);
    margin-bottom: 1rem;
    line-height: 1.1;
}

.hero-text h2 {
    font-size: 1.5rem;
    color: var(--text-light);
    margin-bottom: 2rem;
    font-weight: 500;
}

.hero-text p {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.hero-features {
    display: flex;
    gap: 2rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--anthracite);
    font-weight: 500;
}

.feature-item i {
    color: var(--primary-yellow);
    font-size: 1.2rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero-image {
    position: relative;
}

.hero-image img {
    width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.hero-image img:hover {
    transform: scale(1.02);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}

/* Features Section */
.features {
    padding: 80px 0;
    background: var(--white);
}

.features h2 {
    text-align: center;
    font-size: 2.5rem;
    color: var(--anthracite);
    margin-bottom: 3rem;
    font-weight: 700;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
    border-top: 4px solid var(--primary-yellow);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}

.feature-icon {
    background: linear-gradient(135deg, var(--primary-yellow), var(--dark-yellow));
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.feature-icon i {
    font-size: 2rem;
    color: var(--anthracite);
}

.feature-card h3 {
    font-size: 1.3rem;
    color: var(--anthracite);
    margin-bottom: 1rem;
    font-weight: 600;
}

.feature-card p {
    color: var(--text-light);
    line-height: 1.7;
}

/* Product Showcase */
.product-showcase {
    padding: 80px 0;
    background: var(--light-gray);
}

.showcase-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.showcase-images {
    position: relative;
}

.main-image img {
    width: 100%;
    border-radius: 12px;
    box-shadow: var(--shadow);
    margin-bottom: 1rem;
}

.thumbnail-images {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}

.thumbnail-images img {
    width: 100%;
    height: 120px;
    object-fit: cover;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
}

.thumbnail-images img:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow);
}

.showcase-info h3 {
    font-size: 2rem;
    color: var(--anthracite);
    margin-bottom: 1rem;
    font-weight: 700;
}

.showcase-info p {
    color: var(--text-light);
    margin-bottom: 2rem;
    font-size: 1.1rem;
    line-height: 1.7;
}

.feature-list {
    list-style: none;
}

.feature-list li {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
    font-weight: 500;
}

.feature-list i {
    color: var(--primary-yellow);
    font-size: 1.1rem;
}

/* Specifications */
.specifications {
    padding: 80px 0;
    background: var(--white);
}

.specifications h2 {
    text-align: center;
    font-size: 2.5rem;
    color: var(--anthracite);
    margin-bottom: 3rem;
    font-weight: 700;
}

.specs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.specs-category {
    background: var(--light-gray);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.specs-category h3 {
    color: var(--anthracite);
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
    font-weight: 600;
    text-align: center;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--primary-yellow);
}

.specs-table {
    width: 100%;
    border-collapse: collapse;
}

.specs-table tr {
    border-bottom: 1px solid var(--border-color);
}

.specs-table td {
    padding: 0.8rem 0;
    font-weight: 500;
}

.specs-table td:first-child {
    color: var(--text-light);
    width: 60%;
}

.specs-table td:last-child {
    color: var(--anthracite);
    font-weight: 600;
    text-align: right;
}

/* Applications */
.applications {
    padding: 80px 0;
    background: var(--light-gray);
}

.applications h2 {
    text-align: center;
    font-size: 2.5rem;
    color: var(--anthracite);
    margin-bottom: 3rem;
    font-weight: 700;
}

.applications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.application-item {
    background: var(--white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.application-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}

.application-item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.application-item h3 {
    padding: 1.5rem;
    color: var(--anthracite);
    font-size: 1.2rem;
    font-weight: 600;
    text-align: center;
}

/* CTA Section */
.cta {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--anthracite), var(--dark-anthracite));
    color: var(--white);
    text-align: center;
}

.cta-content h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.cta-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Footer */
.footer {
    background: var(--dark-anthracite);
    color: var(--white);
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
    color: var(--primary-yellow);
    margin-bottom: 1rem;
    font-weight: 600;
}

.footer-section p {
    opacity: 0.8;
    line-height: 1.7;
}

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

.footer-section ul li {
    margin-bottom: 0.5rem;
    opacity: 0.8;
    transition: var(--transition);
}

.footer-section ul li:hover {
    opacity: 1;
    color: var(--primary-yellow);
}

.footer-section ul li a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition);
}

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

.footer-section ul li i {
    color: var(--primary-yellow);
    margin-right: 0.5rem;
    width: 15px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 2rem;
    text-align: center;
    opacity: 0.6;
}

/* Mobile Navigation Styles */
.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);
}

/* Responsive Design */
@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: flex;
        z-index: 1001;
    }

    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--white);
        box-shadow: var(--shadow);
        flex-direction: column;
        gap: 0;
        padding: 1rem 0;
    }

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

    .nav-menu li {
        width: 100%;
    }

    .nav-link {
        display: block;
        width: 100%;
        padding: 1rem 2rem;
        border-radius: 0;
        text-align: left;
    }

    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }

    .hero-text h1 {
        font-size: 2.5rem;
    }

    .showcase-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

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

    .features-grid,
    .specs-grid {
        grid-template-columns: 1fr;
    }

    .applications-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }

    .container {
        padding: 0 15px;
    }
}

@media (max-width: 480px) {
    .hero-text h1 {
        font-size: 2rem;
    }

    .hero-features {
        flex-direction: column;
        gap: 1rem;
    }

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

/* Animation Keyframes */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-text,
.feature-card,
.application-item {
    animation: fadeInUp 0.8s ease-out;
}

/* Smooth scrolling enhancement */
@media (prefers-reduced-motion: no-preference) {
    html {
        scroll-behavior: smooth;
    }
}