:root {
    --primary-blue: #1e40af;
    --secondary-blue: #3b82f6;
    --light-blue: #dbeafe;
    --dark-gray: #1f2937;
    --medium-gray: #6b7280;
    --light-gray: #f8fafc;
    --white: #ffffff;
    --border-gray: #e5e7eb;
    --success-green: #059669;
    --warning-orange: #d97706;
    --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);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--light-gray);
    color: var(--dark-gray);
    line-height: 1.6;
    scroll-behavior: smooth;
}

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

/* Header Styles */
header {
    padding: 1rem 0;
    position: fixed;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-gray);
    z-index: 1000;
    box-shadow: var(--shadow);
}

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

.logo {
    font-family: 'Orbitron', sans-serif;
    font-size: 2.2rem;
    font-weight: bold;
    color: var(--primary-blue);
    cursor: pointer;
    transition: color 0.3s ease;
}

.logo:hover {
    color: var(--secondary-blue);
}

.logo-container {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
    max-width: 300px;
}

.header-highlight {
    color: var(--medium-gray);
    font-size: 0.85rem;
    margin-top: 0.3rem;
    font-weight: 400;
    letter-spacing: 0.5px;
    text-align: left;
    width: 100%;
    line-height: 1.2;
}

.mobile-menu-toggle {
    display: none;
    background: var(--white);
    border: 2px solid var(--secondary-blue);
    font-size: 1.2rem;
    color: var(--primary-blue);
    cursor: pointer;
    padding: 10px 12px;
    border-radius: 8px;
    transition: all 0.3s ease;
    box-shadow: var(--shadow);
    position: relative;
    z-index: 1001;
}

.mobile-menu-toggle:hover {
    background: var(--secondary-blue);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.mobile-menu-toggle:active {
    transform: translateY(0);
}

.nav-links {
    display: flex;
    align-items: center;
}

.nav-link,
button.nav-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    margin-left: 15px;
    border-radius: 8px;
    background: var(--white);
    border: 2px solid var(--secondary-blue);
    transition: all 0.3s ease;
    text-decoration: none;
    color: var(--primary-blue);
    font-weight: 500;
    cursor: pointer;
    font-family: inherit;
    font-size: 1rem;
    line-height: 1.2;
    box-sizing: border-box;
}

button.nav-link {
    font-family: inherit;
    font-size: inherit;
    display: inline-block;
    padding: 12px 24px;
    margin-left: 15px;
    border-radius: 8px;
    border: 2px solid var(--secondary-blue);
    background: var(--white);
    color: var(--primary-blue);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
}


.nav-link:hover,
button.nav-link:hover {
    background: var(--secondary-blue);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--white) 0%, var(--light-blue) 100%);
    position: relative;
    padding-top: 100px;
    padding-bottom: 2rem;
}

.hero-content {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    gap: 3rem;
}

.hero-text {
    flex: 1;
    padding-right: 2rem;
    max-width: 600px;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.hero-text h1 {
    margin: 0;
    font-family: 'Orbitron', sans-serif;
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--primary-blue);
    line-height: 1.2;
}

.hero-text p {
    margin: 0;
    font-size: 1.2rem;
    color: var(--medium-gray);
    line-height: 1.7;
}

.hero-btn {
    align-self: flex-start;
    margin: 0;
    padding: 1.2rem 2.5rem;
    font-size: 1.1rem;
    background: var(--secondary-blue);
    color: var(--white);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: var(--shadow);
}

.hero-btn:hover {
    background: var(--primary-blue);
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

.cyber-border {
    /* Remove cyber styling, just use the button styles */
}

/* Gallery Section */
.gallery-section {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    max-width: 500px;
}

.gallery-items {
    width: 100%;
    position: relative;
}

.gallery-item {
    display: none;
    width: 100%;
}

.gallery-item.active {
    display: block;
}

.gallery-image {
    width: 100%;
    position: relative;
    overflow: hidden;
    border-radius: 12px;
    box-shadow: var(--shadow-xl);
    aspect-ratio: 4/5;
    margin-bottom: 1rem;
}

.gallery-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 12px;
    transition: transform 0.3s ease;
}

.gallery-image:hover img {
    transform: scale(1.05);
}

.image-label {
    background: var(--white);
    color: var(--dark-gray);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--border-gray);
    box-shadow: var(--shadow);
}

.image-label h4 {
    color: var(--primary-blue);
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.image-label p {
    font-size: 0.9rem;
    line-height: 1.5;
    color: var(--medium-gray);
    margin: 0;
}

.gallery-nav {
    width: 100%;
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 1.5rem;
}

.gallery-nav-btn {
    background: var(--white);
    color: var(--primary-blue);
    border: 2px solid var(--secondary-blue);
    padding: 12px 24px;
    cursor: pointer;
    border-radius: 8px;
    transition: all 0.3s ease;
    font-size: 1rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 8px;
    box-shadow: var(--shadow);
}

.gallery-nav-btn:hover {
    background: var(--secondary-blue);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.gallery-nav-btn i {
    font-size: 0.9em;
}

/* News Section */
.news-section {
    padding: 4rem 0;
    background: var(--light-gray);
    border-top: 1px solid var(--border-gray);
}

.news-section h2 {
    text-align: center;
    color: var(--primary-blue);
    font-size: 2.5rem;
    margin-bottom: 1rem;
    font-family: 'Orbitron', sans-serif;
    font-weight: 700;
}

.news-section h2 i {
    color: var(--secondary-blue);
    margin-right: 1rem;
}

.news-section > .container > p {
    text-align: center;
    font-size: 1.2rem;
    color: var(--medium-gray);
    margin-bottom: 3rem;
}

.news-content {
    max-width: 1000px;
    margin: 0 auto;
}

.news-gallery {
    position: relative;
}

.news-items {
    position: relative;
    min-height: 400px;
}

.news-item {
    display: none;
    opacity: 0;
    transition: opacity 0.5s ease;
}

.news-item.active {
    display: flex;
    opacity: 1;
    gap: 3rem;
    align-items: flex-start;
    background: var(--white);
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-gray);
}

.news-image {
    flex: 0 0 300px;
    height: 250px;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.news-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.news-item:hover .news-image img {
    transform: scale(1.05);
}

.news-text {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.news-date {
    color: var(--secondary-blue);
    font-size: 0.9rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.news-text h3 {
    color: var(--primary-blue);
    font-size: 1.5rem;
    font-weight: 600;
    margin: 0;
    line-height: 1.3;
}

.news-text p {
    color: var(--medium-gray);
    line-height: 1.6;
    margin: 0;
    flex-grow: 1;
}

.news-cta {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--secondary-blue);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    align-self: flex-start;
    padding: 0.5rem 0;
}

.news-cta:hover {
    color: var(--primary-blue);
    transform: translateX(5px);
}

.news-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 2rem;
    padding: 0 2.5rem;
}

.news-nav-btn {
    background: var(--white);
    color: var(--primary-blue);
    border: 2px solid var(--secondary-blue);
    padding: 12px 24px;
    cursor: pointer;
    border-radius: 8px;
    transition: all 0.3s ease;
    font-size: 1rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 8px;
    box-shadow: var(--shadow);
}

.news-nav-btn:hover {
    background: var(--secondary-blue);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.news-indicators {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.news-indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--border-gray);
    cursor: pointer;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.news-indicator:hover {
    background: var(--secondary-blue);
    transform: scale(1.2);
}

.news-indicator.active {
    background: var(--primary-blue);
    border-color: var(--secondary-blue);
    transform: scale(1.3);
}

/* Tech Process Section */
.tech-process {
    padding: 4rem 0;
    background: var(--white);
}

.tech-process h2 {
    text-align: center;
    color: var(--primary-blue);
    font-size: 2.5rem;
    margin-bottom: 1rem;
    font-family: 'Orbitron', sans-serif;
    font-weight: 700;
}

.tech-process h2 i {
    color: var(--secondary-blue);
    margin-right: 1rem;
}

.gost-badge {
    display: block;
    text-align: center;
    margin: 1rem auto 2rem auto;
    padding: 12px 24px;
    background: var(--success-green);
    color: var(--white);
    border-radius: 25px;
    font-weight: 600;
    font-size: 1rem;
    width: fit-content;
    box-shadow: var(--shadow);
}

.gost-badge i {
    margin-right: 8px;
}

.tech-process > .container > p {
    text-align: center;
    font-size: 1.2rem;
    color: var(--medium-gray);
    margin-bottom: 3rem;
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.process-card {
    background: var(--white);
    padding: 2.5rem;
    border: 1px solid var(--border-gray);
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    text-align: center;
}

.process-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--secondary-blue);
}

.process-card i {
    color: var(--secondary-blue);
    font-size: 3rem;
    margin-bottom: 1.5rem;
    display: block;
}

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

.process-card p {
    color: var(--medium-gray);
    line-height: 1.6;
}

/* Fuel Purchase Section */
.fuel-purchase {
    padding: 4rem 0;
    background: var(--light-gray);
}

.fuel-purchase h2 {
    text-align: center;
    color: var(--primary-blue);
    font-size: 2.5rem;
    margin-bottom: 3rem;
    font-family: 'Orbitron', sans-serif;
    font-weight: 700;
}

.fuel-purchase h2 i {
    color: var(--secondary-blue);
    margin-right: 1rem;
}

.purchase-advantages {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

/* Features Section */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    padding: 4rem 0;
}

.feature-card {
    background: var(--white);
    padding: 2.5rem;
    border: 1px solid var(--border-gray);
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--secondary-blue);
}

.feature-card i {
    color: var(--secondary-blue);
    font-size: 3rem;
    margin-bottom: 1.5rem;
    display: block;
}

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

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

/* Contact Form Section */
.contact-form {
    padding: 4rem 0;
    background: var(--white);
}

.contact-form h2 {
    text-align: center;
    color: var(--primary-blue);
    font-size: 2.5rem;
    margin-bottom: 3rem;
    font-family: 'Orbitron', sans-serif;
    font-weight: 700;
}

form {
    max-width: 600px;
    margin: 0 auto 3rem auto;
    background: var(--white);
    padding: 3rem;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-gray);
}

.form-group {
    margin-bottom: 2rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--dark-gray);
    font-weight: 500;
}

input,
textarea {
    width: 100%;
    padding: 1rem;
    background: var(--white);
    border: 2px solid var(--border-gray);
    color: var(--dark-gray);
    font-family: inherit;
    font-size: 1rem;
    transition: all 0.3s ease;
    border-radius: 8px;
}

input:focus,
textarea:focus {
    outline: none;
    border-color: var(--secondary-blue);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

button {
    background: var(--secondary-blue);
    color: var(--white);
    border: none;
    padding: 1rem 2rem;
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    border-radius: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: var(--shadow);
}

button:hover {
    background: var(--primary-blue);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

button i {
    margin-right: 8px;
}

.contact-block {
    background: var(--white);
    border: 1px solid var(--border-gray);
    border-radius: 12px;
    padding: 3rem;
    margin: 0 auto;
    max-width: 800px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    box-shadow: var(--shadow);
}

.contact-block h3 {
    color: var(--primary-blue);
    margin-bottom: 1.5rem;
    font-size: 1.3rem;
    font-weight: 600;
}

.contact-block h3 i {
    color: var(--secondary-blue);
    margin-right: 10px;
}

.contact-block p {
    color: var(--medium-gray);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.contact-block i {
    color: var(--secondary-blue);
    margin-right: 8px;
}

.contact-block a {
    color: var(--primary-blue);
    text-decoration: none;
}

.contact-block a:hover {
    text-decoration: underline;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1001;
    overflow-y: auto;
    padding: 0;
    box-sizing: border-box;
}

.modal-content {
    position: relative;
    background: var(--white);
    margin: 20px auto;
    padding: 3rem;
    width: 90%;
    max-width: 800px;
    border-radius: 12px;
    box-shadow: var(--shadow-xl);
}

.close-modal {
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--medium-gray);
    transition: color 0.3s ease;
}

.close-modal:hover {
    color: var(--primary-blue);
}

.about-modal-content {
    max-width: 900px;
    background: var(--white);
    padding: 2.5rem;
    max-height: calc(100vh - 80px);
    overflow-y: scroll;
    overflow-x: hidden;
    border-radius: 12px;
    margin: 40px auto;
    scrollbar-width: none; /* Firefox */
    -ms-overflow-style: none; /* Internet Explorer 10+ */
    position: relative;
    height: auto;
    width: 90%;
    box-sizing: border-box;
}

.about-modal-content::-webkit-scrollbar {
    display: none; /* Chrome, Safari, Edge */
}



.about-header {
    text-align: center;
    background: var(--light-blue);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    border-radius: 12px;
    border: 1px solid var(--border-gray);
}

.about-header h2 {
    font-family: 'Orbitron', sans-serif;
    color: var(--primary-blue);
    margin: 0.5rem 0;
    font-size: 2.2rem;
    font-weight: 700;
}

.cyber-line {
    height: 2px;
    background: var(--secondary-blue);
    margin: 1rem auto;
    width: 80%;
    border-radius: 1px;
}

.about-intro {
    margin-bottom: 1.5rem;
}

.highlight-box {
    background: var(--light-blue);
    border: 1px solid var(--secondary-blue);
    border-left: 4px solid var(--secondary-blue);
    border-radius: 8px;
    padding: 2rem;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.highlight-box i {
    color: var(--secondary-blue);
    font-size: 1.5rem;
    margin-top: 0.2rem;
}

.text-glow {
    color: var(--primary-blue);
    font-weight: 600;
}

.about-section {
    margin-bottom: 2rem;
    padding: 0.5rem 0;
    min-height: auto;
}

.about-section h3 {
    color: var(--primary-blue);
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.about-section h3 i {
    color: var(--secondary-blue);
}

.activity-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    min-height: auto;
}

.activity-item {
    background: var(--white);
    border: 1px solid var(--border-gray);
    border-radius: 12px;
    padding: 2rem;
    position: relative;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

.activity-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--secondary-blue);
}

.number-badge {
    position: absolute;
    top: -15px;
    left: -15px;
    background: var(--secondary-blue);
    color: var(--white);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1rem;
    box-shadow: var(--shadow-lg);
}

.cyber-list {
    list-style: none;
    padding: 0;
}

.cyber-list li {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
    padding: 1.2rem;
    background: var(--light-gray);
    border: 1px solid var(--border-gray);
    border-radius: 8px;
    transition: all 0.3s ease;
}

.cyber-list li:hover {
    background: var(--light-blue);
    transform: translateX(10px);
    border-color: var(--secondary-blue);
}

.cyber-list i {
    color: var(--secondary-blue);
    font-size: 1.2rem;
}

.about-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
    min-height: auto;
}

.about-feature {
    background: var(--white);
    border: 1px solid var(--border-gray);
    border-radius: 12px;
    padding: 2rem;
    transition: all 0.3s ease;
    display: flex;
    gap: 1rem;
    box-shadow: var(--shadow);
}

.about-feature:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--secondary-blue);
}

.about-feature i {
    color: var(--secondary-blue);
    font-size: 2rem;
    flex-shrink: 0;
}

.feature-content h4 {
    color: var(--primary-blue);
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.feature-content p {
    color: var(--medium-gray);
    font-size: 0.9rem;
    line-height: 1.5;
    margin: 0;
}

/* Patents Gallery */
.patents-gallery {
    margin-top: 2rem;
}

.patents-gallery > p {
    text-align: center;
    color: var(--medium-gray);
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

.patent-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.patent-card {
    background: var(--white);
    border: 1px solid var(--border-gray);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    cursor: pointer;
}

.patent-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--secondary-blue);
}

.patent-image {
    position: relative;
    width: 100%;
    height: 250px;
    overflow: hidden;
}

.patent-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.patent-card:hover .patent-image img {
    transform: scale(1.05);
}

.patent-info {
    padding: 1.5rem;
    background: var(--white);
    border-top: 3px solid var(--secondary-blue);
}

.patent-info h4 {
    color: var(--primary-blue);
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.patent-info h4::before {
    content: "🏆";
    font-size: 1.1rem;
}

.patent-info p {
    color: var(--medium-gray);
    line-height: 1.6;
    margin: 0;
    font-size: 0.95rem;
}

.patents-gallery > p:last-child {
    margin-top: 2rem;
    padding: 1.5rem;
    background: var(--light-blue);
    border-radius: 8px;
    border-left: 4px solid var(--secondary-blue);
    text-align: center;
    font-style: italic;
}

.document-content {
    margin-top: 2rem;
}

.document-content ul {
    list-style-type: none;
    padding: 0;
}

.document-content li {
    padding: 1rem;
    margin: 0.5rem 0;
    background: var(--light-gray);
    border-left: 4px solid var(--secondary-blue);
    border-radius: 4px;
}

/* Lightbox Styles */
.lightbox {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    z-index: 2000;
    justify-content: center;
    align-items: center;
}

.lightbox.active {
    display: flex;
}

.lightbox-content {
    position: relative;
    max-width: 90%;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.lightbox-image-container {
    position: relative;
    max-width: 100%;
    max-height: 80vh;
}

.lightbox-image {
    max-width: 100%;
    max-height: 80vh;
    object-fit: contain;
    border: 3px solid var(--white);
    border-radius: 8px;
    box-shadow: var(--shadow-xl);
}

.lightbox-label {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    color: var(--dark-gray);
    padding: 15px;
    text-align: center;
    border-bottom-left-radius: 8px;
    border-bottom-right-radius: 8px;
    border-top: 3px solid var(--secondary-blue);
    backdrop-filter: blur(10px);
}

.lightbox-nav {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 2rem;
    width: 100%;
}

.lightbox-btn {
    background: rgba(255, 255, 255, 0.2);
    color: var(--white);
    border: 2px solid var(--white);
    padding: 15px 20px;
    cursor: pointer;
    border-radius: 50%;
    transition: all 0.3s ease;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lightbox-btn:hover {
    background: var(--white);
    color: var(--primary-blue);
    transform: scale(1.1);
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 20px;
    background: rgba(255, 255, 255, 0.2);
    border: 2px solid var(--white);
    color: var(--white);
    padding: 10px 15px;
    cursor: pointer;
    border-radius: 50%;
    transition: all 0.3s ease;
    font-size: 1.5rem;
    z-index: 2001;
}

.lightbox-close:hover {
    background: var(--white);
    color: var(--primary-blue);
    transform: scale(1.1);
}

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

@keyframes slideInMobile {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.scroll-animate {
    opacity: 0;
    animation-duration: 0.8s;
    animation-fill-mode: both;
    transition: opacity 0.8s ease;
}

.animate-visible {
    opacity: 1;
    animation-name: fadeInUp;
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }

    .hero {
        padding-top: 120px;
        min-height: auto;
        padding-bottom: 3rem;
    }

    .hero-content {
        flex-direction: column;
        align-items: center;
        gap: 2rem;
    }

    .hero-text {
        padding-right: 0;
        text-align: center;
        max-width: 100%;
    }

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

    .hero-btn {
        align-self: center;
        padding: 1rem 2rem;
        font-size: 1rem;
    }

    .gallery-section {
        width: 100%;
        max-width: 400px;
    }

    .gallery-image {
        aspect-ratio: 3/4;
    }

    .image-label {
        padding: 1rem;
    }

    .image-label h4 {
        font-size: 1rem;
        margin-bottom: 0.3rem;
    }

    .image-label p {
        font-size: 0.85rem;
        line-height: 1.3;
    }

    .gallery-nav-btn {
        padding: 10px 18px;
        font-size: 0.9rem;
    }

    .news-item.active {
        flex-direction: column;
        gap: 2rem;
        padding: 2rem;
    }

    .news-image {
        flex: none;
        width: 100%;
        height: 200px;
    }

    .news-text h3 {
        font-size: 1.3rem;
    }

    .news-nav {
        flex-direction: column;
        gap: 1.5rem;
        padding: 0 1rem;
    }

    .news-nav-btn {
        padding: 10px 18px;
        font-size: 0.9rem;
    }

    .news-indicators {
        order: -1;
    }

    .patent-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .patent-image {
        height: 200px;
    }

    .patent-info {
        padding: 1.25rem;
    }

    .patent-info h4 {
        font-size: 1.1rem;
    }

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

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--white);
        border-top: 1px solid var(--border-gray);
        box-shadow: var(--shadow-xl);
        flex-direction: column;
        padding: 1.5rem 0;
        z-index: 1000;
        opacity: 0;
        transform: translateY(-10px);
        transition: all 0.3s ease;
        max-height: 0;
        overflow: hidden;
    }

    .nav-links.mobile-menu-open {
        display: flex;
        opacity: 1;
        transform: translateY(0);
        max-height: 400px;
    }

    .nav-link,
    button.nav-link {
        margin: 0.75rem 1.5rem;
        width: auto;
        text-align: center;
        transform: translateX(-20px);
        opacity: 0;
        animation: slideInMobile 0.3s ease forwards;
    }

    .nav-links.mobile-menu-open .nav-link:nth-child(1) { animation-delay: 0.1s; }
    .nav-links.mobile-menu-open .nav-link:nth-child(2) { animation-delay: 0.2s; }
    .nav-links.mobile-menu-open .nav-link:nth-child(3) { animation-delay: 0.3s; }
    .nav-links.mobile-menu-open .nav-link:nth-child(4) { animation-delay: 0.4s; }
    .nav-links.mobile-menu-open .nav-link:nth-child(5) { animation-delay: 0.5s; }

    nav {
        position: relative;
    }

    .logo-container {
        align-items: flex-start;
        max-width: 100%;
        text-align: left;
    }

    .header-highlight {
        text-align: left;
    }

    .features,
    .process-steps,
    .purchase-advantages {
        grid-template-columns: 1fr;
    }

    .contact-block {
        grid-template-columns: 1fr;
        gap: 2rem;
        padding: 2rem;
    }

    .activity-grid,
    .about-features {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .about-modal-content {
        padding: 1.5rem;
        margin: 10px auto;
        max-height: calc(100vh - 40px);
        overflow-y: scroll;
        overflow-x: hidden;
        scrollbar-width: none; /* Firefox */
        -ms-overflow-style: none; /* Internet Explorer 10+ */
        position: relative;
        width: 95%;
        box-sizing: border-box;
    }

    .about-header {
        margin: -1.5rem -1.5rem 1.5rem -1.5rem;
        padding: 1.5rem;
    }

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

    .about-section {
        margin-bottom: 1.5rem;
        padding: 0.3rem;
        min-height: auto;
    }

    .highlight-box {
        padding: 1rem;
    }

    .modal {
        padding: 0;
        overflow-y: auto;
    }

    form {
        padding: 2rem;
        margin