:root {
    --bg-primary: #0a0e17;
    --bg-secondary: #111827;
    --bg-card: rgba(17, 24, 39, 0.8);
    --bg-glass: rgba(255, 255, 255, 0.03);
    --border-glass: rgba(255, 255, 255, 0.08);
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    --accent-blue: #3b82f6;
    --accent-purple: #8b5cf6;
    --accent-cyan: #22d3ee;
    --accent-green: #10b981;
    --gradient-primary: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
    --gradient-glow: linear-gradient(135deg, rgba(59, 130, 246, 0.5) 0%, rgba(139, 92, 246, 0.5) 100%);
    --gradient-text: linear-gradient(90deg, #3b82f6, #8b5cf6, #22d3ee);
    --shadow-glow: 0 0 30px rgba(59, 130, 246, 0.3);
    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    --font-display: 'Orbitron', sans-serif;
    --font-body: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.7;
    color: var(--text-primary);
    background: var(--bg-primary);
    overflow-x: hidden;
}

.grid-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(rgba(59, 130, 246, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(59, 130, 246, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
    z-index: 0;
}

.particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.particle {
    position: absolute;
    width: 2px;
    height: 2px;
    background: var(--accent-cyan);
    border-radius: 50%;
    opacity: 0.6;
    animation: float 15s infinite ease-in-out;
}

@keyframes float {
    0%, 100% { transform: translateY(0) translateX(0); opacity: 0.6; }
    25% { transform: translateY(-30px) translateX(10px); opacity: 0.8; }
    50% { transform: translateY(-20px) translateX(-10px); opacity: 0.4; }
    75% { transform: translateY(-40px) translateX(5px); opacity: 0.7; }
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(10, 14, 23, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-glass);
    transition: var(--transition-normal);
}

.header.scrolled {
    background: rgba(10, 14, 23, 0.95);
    box-shadow: var(--shadow-glow);
}

.header-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.logo-img {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
}

.logo-text {
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: 1px;
}

.nav-desktop {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link {
    padding: 10px 16px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.nav-link:hover {
    color: var(--text-primary);
    background: var(--bg-glass);
}

.nav-btn {
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    background: var(--gradient-primary);
    border-radius: var(--radius-sm);
    text-decoration: none;
    transition: var(--transition-fast);
    box-shadow: 0 0 20px rgba(59, 130, 246, 0.3);
}

.nav-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(59, 130, 246, 0.5);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    background: none;
    border: none;
    cursor: pointer;
}

.menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition-fast);
}

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

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

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

.nav-mobile {
    display: none;
    position: fixed;
    top: 73px;
    left: 0;
    width: 100%;
    background: rgba(10, 14, 23, 0.98);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-glass);
    padding: 24px;
    z-index: 999;
    transform: translateY(-100%);
    opacity: 0;
    transition: var(--transition-normal);
}

.nav-mobile.active {
    transform: translateY(0);
    opacity: 1;
}

.nav-mobile-link {
    display: block;
    padding: 16px;
    font-size: 16px;
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    border-bottom: 1px solid var(--border-glass);
    transition: var(--transition-fast);
}

.nav-mobile-link:hover {
    color: var(--text-primary);
    background: var(--bg-glass);
}

.nav-mobile-btn {
    display: block;
    margin-top: 16px;
    padding: 16px;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    text-decoration: none;
    text-align: center;
}

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 24px 80px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(ellipse at 30% 20%, rgba(59, 130, 246, 0.15) 0%, transparent 50%),
                radial-gradient(ellipse at 70% 80%, rgba(139, 92, 246, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    flex: 1;
    max-width: 600px;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-block;
    padding: 8px 16px;
    font-size: 12px;
    font-weight: 600;
    color: var(--accent-cyan);
    background: rgba(34, 211, 238, 0.1);
    border: 1px solid rgba(34, 211, 238, 0.3);
    border-radius: 100px;
    margin-bottom: 24px;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(32px, 5vw, 56px);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
}

.gradient-text {
    display: block;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-desc {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 48px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
    cursor: pointer;
    border: none;
}

.btn-icon {
    font-size: 18px;
}

.btn-primary {
    color: var(--text-primary);
    background: var(--gradient-primary);
    box-shadow: 0 0 30px rgba(59, 130, 246, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 0 50px rgba(59, 130, 246, 0.6);
}

.btn-secondary {
    color: var(--text-primary);
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.15);
}

.btn-outline {
    color: var(--accent-blue);
    background: transparent;
    border: 1px solid var(--accent-blue);
}

.btn-outline:hover {
    background: rgba(59, 130, 246, 0.1);
}

.btn-large {
    padding: 18px 36px;
    font-size: 18px;
}

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

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

.stat-number {
    display: block;
    font-family: var(--font-display);
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
}

.stat-label {
    font-size: 14px;
    color: var(--text-muted);
}

.hero-visual {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.hero-image-wrapper {
    position: relative;
    max-width: 600px;
    width: 100%;
}

.hero-img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-xl);
    position: relative;
    z-index: 1;
}

.hero-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120%;
    height: 120%;
    background: var(--gradient-glow);
    filter: blur(80px);
    opacity: 0.6;
    z-index: 0;
}

.section {
    padding: 100px 0;
    position: relative;
    z-index: 1;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-badge {
    display: inline-block;
    padding: 6px 14px;
    font-size: 12px;
    font-weight: 600;
    color: var(--accent-cyan);
    background: rgba(34, 211, 238, 0.1);
    border: 1px solid rgba(34, 211, 238, 0.2);
    border-radius: 100px;
    margin-bottom: 16px;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(28px, 4vw, 42px);
    font-weight: 700;
    margin-bottom: 16px;
}

.section-desc {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.intro {
    background: linear-gradient(180deg, transparent 0%, rgba(17, 24, 39, 0.5) 100%);
}

.intro-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.intro-content p {
    font-size: 17px;
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.8;
}

.intro-content .btn {
    margin-top: 16px;
}

.intro-visual {
    display: flex;
    justify-content: center;
}

.intro-img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-card);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.product-card {
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-glow);
    opacity: 0;
    transition: var(--transition-normal);
}

.product-card:hover {
    transform: translateY(-8px);
    border-color: rgba(59, 130, 246, 0.3);
    box-shadow: 0 0 40px rgba(59, 130, 246, 0.2);
}

.product-card:hover::before {
    opacity: 0.05;
}

.product-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    margin-bottom: 24px;
    position: relative;
    z-index: 1;
}

.product-icon svg {
    width: 28px;
    height: 28px;
    color: white;
}

.product-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    position: relative;
    z-index: 1;
}

.product-desc {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.7;
    position: relative;
    z-index: 1;
}

.product-link {
    font-size: 14px;
    font-weight: 600;
    color: var(--accent-blue);
    text-decoration: none;
    transition: var(--transition-fast);
    position: relative;
    z-index: 1;
}

.product-link:hover {
    color: var(--accent-cyan);
}

.scenes {
    background: var(--bg-secondary);
}

.scenes-grid {
    display: flex;
    flex-direction: column;
    gap: 48px;
}

.scene-card {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 48px;
    align-items: center;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-xl);
    padding: 40px;
    transition: var(--transition-normal);
}

.scene-card:hover {
    border-color: rgba(59, 130, 246, 0.2);
    box-shadow: 0 0 60px rgba(59, 130, 246, 0.1);
}

.scene-card-reverse {
    grid-template-columns: 1.2fr 1fr;
}

.scene-card-reverse .scene-image {
    order: 2;
}

.scene-image img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
}

.scene-title {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 16px;
}

.scene-desc {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.7;
}

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

.scene-features li {
    padding: 8px 0;
    padding-left: 28px;
    font-size: 15px;
    color: var(--text-secondary);
    position: relative;
}

.scene-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent-green);
    font-weight: 600;
}

.scenes-cta {
    text-align: center;
    margin-top: 48px;
    padding: 40px;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-xl);
}

.scenes-cta p {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.guide {
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

.guide-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: start;
}

.guide-steps {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.guide-step {
    display: flex;
    gap: 24px;
    padding: 24px;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    transition: var(--transition-normal);
}

.guide-step:hover {
    border-color: rgba(59, 130, 246, 0.3);
    transform: translateX(8px);
}

.step-number {
    font-family: var(--font-display);
    font-size: 32px;
    font-weight: 700;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    flex-shrink: 0;
}

.step-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
}

.step-desc {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
}

.guide-visual {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 32px;
    position: sticky;
    top: 120px;
}

.phone-mockup {
    background: linear-gradient(145deg, #1f2937 0%, #111827 100%);
    border-radius: 40px;
    padding: 12px;
    box-shadow: 0 25px 80px rgba(0, 0, 0, 0.5), 0 0 40px rgba(59, 130, 246, 0.2);
}

.phone-screen {
    background: #000;
    border-radius: 32px;
    overflow: hidden;
}

.phone-screen img {
    display: block;
    width: 270px;
    height: auto;
}

.guide-download {
    text-align: center;
}

.download-tip {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.download-platforms {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin-top: 20px;
    flex-wrap: wrap;
}

.platform-badge {
    padding: 8px 16px;
    font-size: 12px;
    font-weight: 500;
    color: var(--text-muted);
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: 100px;
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.faq-item {
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition-normal);
}

.faq-item:hover {
    border-color: rgba(59, 130, 246, 0.2);
}

.faq-item.active {
    border-color: rgba(59, 130, 246, 0.3);
    box-shadow: 0 0 30px rgba(59, 130, 246, 0.1);
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 24px;
    font-size: 17px;
    font-weight: 600;
    color: var(--text-primary);
    background: none;
    border: none;
    text-align: left;
    cursor: pointer;
    transition: var(--transition-fast);
}

.faq-question:hover {
    color: var(--accent-blue);
}

.faq-icon {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
    transition: var(--transition-fast);
}

.faq-item.active .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
}

.faq-answer p {
    padding: 0 24px 24px;
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
}

.faq-cta {
    text-align: center;
    margin-top: 48px;
}

.faq-cta p {
    font-size: 16px;
    color: var(--text-muted);
    margin-bottom: 20px;
}

.safety {
    background: var(--bg-secondary);
}

.safety-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}

.safety-visual img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-xl);
}

.safety-tips {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.safety-card {
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 24px;
}

.safety-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
}

.safety-icon.warning {
    background: rgba(245, 158, 11, 0.1);
}

.safety-icon.alert {
    background: rgba(59, 130, 246, 0.1);
}

.safety-icon.info {
    background: rgba(16, 185, 129, 0.1);
}

.safety-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
}

.safety-card ul {
    list-style: none;
}

.safety-card li {
    padding: 8px 0;
    padding-left: 20px;
    font-size: 14px;
    color: var(--text-secondary);
    position: relative;
    line-height: 1.6;
}

.safety-card li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--accent-blue);
}

.safety-disclaimer {
    background: rgba(245, 158, 11, 0.05);
    border: 1px solid rgba(245, 158, 11, 0.2);
    border-radius: var(--radius-lg);
    padding: 24px;
    text-align: center;
}

.safety-disclaimer p {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.7;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.news-card {
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 28px;
    transition: var(--transition-normal);
}

.news-card:hover {
    border-color: rgba(59, 130, 246, 0.3);
    transform: translateY(-4px);
}

.news-date {
    font-size: 13px;
    color: var(--accent-cyan);
    margin-bottom: 12px;
}

.news-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
    line-height: 1.4;
}

.news-excerpt {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.7;
}

.news-link {
    font-size: 14px;
    font-weight: 600;
    color: var(--accent-blue);
    text-decoration: none;
    transition: var(--transition-fast);
}

.news-link:hover {
    color: var(--accent-cyan);
}

.about {
    background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 64px;
    align-items: center;
}

.about-visual img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-xl);
}

.about-text .section-badge {
    display: inline-block;
}

.about-text .section-title {
    text-align: left;
    margin-bottom: 24px;
}

.about-text p {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.8;
}

.contact {
    background: var(--bg-secondary);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.contact-info .section-badge {
    display: inline-block;
}

.contact-info .section-title {
    text-align: left;
    margin-bottom: 16px;
}

.contact-info > p {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 32px;
    line-height: 1.7;
}

.contact-features {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.contact-feature {
    display: flex;
    align-items: center;
    gap: 12px;
}

.feature-icon {
    font-size: 20px;
}

.feature-text {
    font-size: 15px;
    color: var(--text-secondary);
}

.cta-card {
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-xl);
    padding: 48px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-glow);
    opacity: 0.05;
}

.cta-card h3 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 12px;
    position: relative;
    z-index: 1;
}

.cta-card > p {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 28px;
    position: relative;
    z-index: 1;
}

.cta-card .btn {
    position: relative;
    z-index: 1;
}

.cta-note {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 16px;
    position: relative;
    z-index: 1;
}

.footer {
    background: var(--bg-primary);
    border-top: 1px solid var(--border-glass);
    padding: 64px 0 32px;
}

.footer-main {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: 64px;
    margin-bottom: 48px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    margin-bottom: 16px;
}

.footer-logo-img {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
}

.footer-logo-text {
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
}

.footer-desc {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.7;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.footer-column h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.footer-column nav {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-column a {
    font-size: 14px;
    color: var(--text-muted);
    text-decoration: none;
    transition: var(--transition-fast);
}

.footer-column a:hover {
    color: var(--accent-blue);
}

.footer-bottom {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    justify-content: center;
    padding-top: 32px;
    border-top: 1px solid var(--border-glass);
    font-size: 13px;
    color: var(--text-muted);
}

.footer-bottom a {
    color: var(--text-muted);
    text-decoration: none;
    transition: var(--transition-fast);
}

.footer-bottom a:hover {
    color: var(--accent-blue);
}

.back-to-top {
    position: fixed;
    bottom: 60px;
    right: 24px;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
    z-index: 900;
    box-shadow: 0 0 30px rgba(59, 130, 246, 0.4);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 0 50px rgba(59, 130, 246, 0.6);
}

.back-to-top svg {
    width: 24px;
    height: 24px;
    color: white;
}

@keyframes pulse {
    0%, 100% { box-shadow: 0 0 30px rgba(59, 130, 246, 0.4); }
    50% { box-shadow: 0 0 50px rgba(59, 130, 246, 0.6); }
}

.back-to-top.visible {
    animation: pulse 2s infinite;
}

.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

@media (max-width: 1024px) {
    .hero {
        flex-direction: column;
        text-align: center;
        padding-top: 100px;
    }
    
    .hero-content {
        max-width: 100%;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .hero-visual {
        margin-top: 48px;
    }
    
    .intro-grid,
    .guide-content,
    .safety-content,
    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .scene-card,
    .scene-card-reverse {
        grid-template-columns: 1fr;
    }
    
    .scene-card-reverse .scene-image {
        order: 0;
    }
    
    .footer-main {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    
    .footer-links {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-desktop {
        display: none;
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .nav-mobile {
        display: block;
    }
    
    .hero {
        min-height: auto;
        padding: 100px 16px 60px;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 24px;
        align-items: center;
    }
    
    .stat-item {
        text-align: center;
    }
    
    .section {
        padding: 60px 0;
    }
    
    .products-grid,
    .news-grid {
        grid-template-columns: 1fr;
    }
    
    .guide-visual {
        position: static;
    }
    
    .footer-links {
        grid-template-columns: 1fr 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: 12px;
    }
    
    .back-to-top {
        bottom: 110px;
        right: 16px;
    }
    
    .faq-question {
        font-size: 15px;
        padding: 20px;
    }
    
    .faq-answer p {
        padding: 0 20px 20px;
        font-size: 14px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .hero-title {
        font-size: 28px;
    }
    
    .hero-desc {
        font-size: 16px;
    }
    
    .btn {
        padding: 12px 20px;
        font-size: 14px;
    }
    
    .section-title {
        font-size: 24px;
    }
    
    .product-card,
    .scene-card {
        padding: 24px;
    }
    
    .guide-step {
        flex-direction: column;
        gap: 16px;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .cta-card {
        padding: 32px 24px;
    }
}