/* CSS Reset & Variables */
:root {
    --bg: #0f0f1a;
    --bg-card: rgba(255, 255, 255, 0.06);
    --text: #e0e0e0;
    --primary: #ff6b35;
    --secondary: #ffa07a;
    --glass-border: rgba(255, 255, 255, 0.12);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    --radius: 16px;
    --transition: 0.3s ease;
}
body.dark-mode {
    --bg: #0a0a14;
    --text: #c0c0c0;
    --bg-card: rgba(255, 255, 255, 0.04);
}
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
html {
    scroll-behavior: smooth;
}
body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    overflow-x: hidden;
}
a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition);
}
a:hover {
    color: var(--secondary);
}
img, svg {
    max-width: 100%;
    height: auto;
    display: block;
}
ul {
    list-style: none;
}

/* Header */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    transition: background var(--transition), box-shadow var(--transition);
}
.site-header.sticky {
    background: rgba(15, 15, 26, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
}
.main-nav {
    padding: 0 24px;
}
.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
    height: 64px;
}
.logo-link {
    display: flex;
    align-items: center;
}
.nav-list {
    display: flex;
    gap: 8px;
}
.nav-link {
    padding: 8px 14px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text);
    transition: background var(--transition), color var(--transition);
}
.nav-link:hover, .nav-link.active {
    background: var(--primary);
    color: #fff;
}
.nav-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}
.search-toggle, .dark-mode-toggle, .menu-toggle {
    background: none;
    border: none;
    color: var(--text);
    cursor: pointer;
    padding: 8px;
    border-radius: 8px;
    transition: background var(--transition);
}
.search-toggle:hover, .dark-mode-toggle:hover, .menu-toggle:hover {
    background: rgba(255, 255, 255, 0.1);
}
.menu-toggle {
    display: none;
}
.search-bar {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
    background: rgba(15, 15, 26, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}
.search-bar.active {
    max-height: 80px;
}
.search-form {
    display: flex;
    max-width: 600px;
    margin: 0 auto;
    padding: 12px 24px;
    gap: 8px;
}
.search-form input {
    flex: 1;
    padding: 10px 16px;
    border-radius: 8px;
    border: 1px solid var(--glass-border);
    background: rgba(255, 255, 255, 0.08);
    color: var(--text);
    font-size: 14px;
}
.search-form input:focus {
    outline: none;
    border-color: var(--primary);
}
.search-form button {
    padding: 10px 24px;
    border-radius: 8px;
    border: none;
    background: var(--primary);
    color: #fff;
    cursor: pointer;
    font-weight: 600;
}

/* Main */
main {
    padding-top: 64px;
}
section {
    padding: 80px 24px;
    max-width: 1200px;
    margin: 0 auto;
}
.section-header {
    text-align: center;
    margin-bottom: 48px;
}
.section-header h2 {
    font-size: 2.2rem;
    color: #fff;
    margin-bottom: 12px;
    position: relative;
    display: inline-block;
}
.section-header h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--primary);
    margin: 12px auto 0;
    border-radius: 2px;
}
.section-desc {
    color: var(--secondary);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

/* Glass Card */
.glass-card {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    padding: 28px;
    transition: transform var(--transition), box-shadow var(--transition);
    opacity: 0;
    transform: translateY(30px);
}
.glass-card.animate-in {
    opacity: 1;
    transform: translateY(0);
}
.glass-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow);
}

/* Hero Section */
.hero-section {
    padding: 40px 24px 80px;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #0f0f1a 0%, #1a1a2e 50%, #0f0f1a 100%);
}
.hero-slider {
    position: relative;
    min-height: 420px;
    display: flex;
    align-items: center;
}
.hero-slide {
    display: none;
    align-items: center;
    gap: 40px;
    width: 100%;
    animation: fadeIn 0.6s ease;
}
.hero-slide.active {
    display: flex;
}
@keyframes fadeIn {
    from { opacity: 0; transform: scale(0.98); }
    to { opacity: 1; transform: scale(1); }
}
.hero-content {
    flex: 1;
}
.hero-content h1, .hero-content h2 {
    font-size: 3rem;
    color: #fff;
    line-height: 1.2;
    margin-bottom: 16px;
}
.hero-subtitle {
    font-size: 1.4rem;
    color: var(--primary);
    margin-bottom: 12px;
}
.hero-desc {
    font-size: 1.05rem;
    color: var(--text);
    max-width: 500px;
    margin-bottom: 24px;
}
.btn-primary {
    display: inline-block;
    padding: 14px 36px;
    background: var(--primary);
    color: #fff;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    transition: background var(--transition), transform var(--transition);
    border: none;
    cursor: pointer;
}
.btn-primary:hover {
    background: #e55a2b;
    transform: translateY(-2px);
}
.hero-visual {
    flex: 1;
    display: flex;
    justify-content: center;
}
.slider-controls {
    position: absolute;
    top: 50%;
    width: 100%;
    left: 0;
    transform: translateY(-50%);
    display: flex;
    justify-content: space-between;
    pointer-events: none;
    padding: 0 20px;
}
.slider-prev, .slider-next {
    pointer-events: auto;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: #fff;
    font-size: 2rem;
    padding: 12px 20px;
    border-radius: 50%;
    cursor: pointer;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    transition: background var(--transition);
}
.slider-prev:hover, .slider-next:hover {
    background: var(--primary);
}
.slider-dots {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 24px;
}
.slider-dots .dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    border: none;
    cursor: pointer;
    transition: background var(--transition);
}
.slider-dots .dot.active {
    background: var(--primary);
}

/* Brand Section */
.brand-section {
    background: linear-gradient(180deg, #0f0f1a, #1a1a2e);
}
.brand-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}
.brand-card {
    text-align: center;
}
.brand-card svg {
    margin: 0 auto 16px;
}
.brand-card h3 {
    color: #fff;
    margin-bottom: 12px;
    font-size: 1.3rem;
}

/* Products Section */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
}
.product-card {
    text-align: center;
}
.product-card svg {
    margin: 0 auto 16px;
}
.product-card h3 {
    color: #fff;
    margin-bottom: 12px;
}

/* Services Section */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
    margin-bottom: 48px;
}
.service-card {
    text-align: center;
}
.service-card svg {
    margin: 0 auto 16px;
}
.service-card h3 {
    color: #fff;
    margin-bottom: 12px;
}

/* FAQ Section */
.faq-section h3 {
    color: #fff;
    font-size: 1.6rem;
    margin-bottom: 24px;
    text-align: center;
}
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}
.faq-item {
    margin-bottom: 12px;
    border-radius: var(--radius);
    overflow: hidden;
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
}
.faq-question {
    width: 100%;
    text-align: left;
    padding: 16px 20px;
    background: none;
    border: none;
    color: var(--text);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: color var(--transition);
}
.faq-question:hover {
    color: var(--primary);
}
.faq-icon {
    font-size: 1.4rem;
    transition: transform var(--transition);
}
.faq-question[aria-expanded="true"] .faq-icon {
    transform: rotate(45deg);
}
.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
    padding: 0 20px;
    color: var(--text);
}
.faq-answer p {
    padding-bottom: 12px;
}

/* HowTo Section */
.howto-section {
    max-width: 800px;
    margin: 48px auto 0;
}
.howto-section h3 {
    color: #fff;
    font-size: 1.4rem;
    margin-bottom: 20px;
}
.howto-content h4 {
    color: var(--primary);
    margin-top: 20px;
    margin-bottom: 8px;
}
.howto-content ol {
    padding-left: 20px;
    margin-bottom: 16px;
}
.howto-content li {
    margin-bottom: 6px;
}

/* News Section */
.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}
.news-card {
    display: flex;
    flex-direction: column;
}
.news-card svg {
    margin-bottom: 12px;
}
.news-card h3 {
    color: #fff;
    font-size: 1.2rem;
    margin-bottom: 8px;
}
.news-date {
    color: var(--secondary);
    font-size: 0.85rem;
    margin-bottom: 8px;
}
.read-more {
    margin-top: auto;
    font-weight: 600;
    color: var(--primary);
}

/* Cases Section */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-bottom: 48px;
}
.case-card {
    text-align: center;
}
.case-card svg {
    margin: 0 auto 16px;
}
.case-card h3 {
    color: #fff;
    margin-bottom: 12px;
}
.testimonials h3 {
    color: #fff;
    font-size: 1.4rem;
    margin-bottom: 24px;
    text-align: center;
}
.testimonial-card {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 16px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}
.testimonial-text {
    font-style: italic;
}

/* Contact Section */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 24px;
}
.contact-info {
    text-align: center;
}
.contact-info svg {
    margin: 0 auto 12px;
}
.contact-info h4 {
    color: #fff;
    margin-bottom: 8px;
}

/* Footer */
.site-footer {
    background: rgba(0, 0, 0, 0.6);
    padding: 48px 24px 24px;
    margin-top: 40px;
}
.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 32px;
}
.footer-about p {
    margin-top: 12px;
    font-size: 0.95rem;
}
.footer-links h4 {
    color: #fff;
    margin-bottom: 12px;
}
.footer-links ul li {
    margin-bottom: 6px;
}
.footer-links a {
    color: var(--text);
    font-size: 0.9rem;
}
.footer-links a:hover {
    color: var(--primary);
}
.footer-meta {
    grid-column: 1 / -1;
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid var(--glass-border);
    font-size: 0.85rem;
    color: var(--text);
}
.footer-meta p {
    margin-bottom: 4px;
}
.footer-bottom {
    text-align: center;
    padding-top: 16px;
    font-size: 0.85rem;
    color: var(--secondary);
}

/* Back to Top */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    border: none;
    font-size: 1.4rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition), visibility var(--transition);
    z-index: 999;
    box-shadow: 0 4px 16px rgba(255, 107, 53, 0.4);
}
.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}
.back-to-top:hover {
    background: #e55a2b;
}

/* Stat Number */
.stat-number {
    font-size: 2.5rem;
    font-weight: bold;
    color: #ff6b35;
    text-align: center;
    padding: 20px;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-list {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        width: 100%;
        background: rgba(15, 15, 26, 0.98);
        flex-direction: column;
        padding: 16px;
        gap: 4px;
    }
    .nav-list.open {
        display: flex;
    }
    .menu-toggle {
        display: block;
    }
    .hero-slide {
        flex-direction: column;
        text-align: center;
    }
    .hero-content h1, .hero-content h2 {
        font-size: 2.2rem;
    }
    .hero-visual {
        display: none;
    }
    section {
        padding: 48px 16px;
    }
    .section-header h2 {
        font-size: 1.8rem;
    }
    .brand-grid, .products-grid, .services-grid, .news-grid, .cases-grid, .contact-grid {
        grid-template-columns: 1fr;
    }
    .footer-content {
        grid-template-columns: 1fr;
    }
}
@media (min-width: 769px) and (max-width: 1024px) {
    .hero-content h1, .hero-content h2 {
        font-size: 2.5rem;
    }
}