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

:root {
    --primary: #1a1a2e;
    --secondary: #16213e;
    --accent: #06b6d4;
    --accent-hover: #0891b2;
    --dark: #0f0f23;
    --darker: #0a0a1a;
    --text: #ffffff;
    --text-muted: #b0b0c8;
    --text-dark: #8a8aaa;
    --gradient-1: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    --gradient-2: linear-gradient(135deg, #16213e 0%, #0f3460 100%);
    --gradient-hero: linear-gradient(135deg, #0a0a1a 0%, #1a1a2e 40%, #16213e 70%, #0f3460 100%);
    --gradient-accent: linear-gradient(135deg, #06b6d4 0%, #22d3ee 100%);
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.4);
    --radius: 12px;
    --radius-lg: 20px;
    --transition: all 0.3s ease;
    --font: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
    --container: 1200px;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    overflow-x: hidden;
}

body {
    font-family: var(--font);
    background: var(--darker);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--accent-hover);
}

img {
    max-width: 100%;
    height: auto;
}

ul {
    list-style: none;
}

.container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 20px 30px 20px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background: var(--gradient-accent);
    color: var(--primary);
    box-shadow: 0 4px 15px rgba(226, 183, 20, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(226, 183, 20, 0.4);
    color: var(--primary);
}

.btn-secondary {
    background: transparent;
    color: var(--text);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: var(--accent);
    border: 2px solid var(--accent);
}

.btn-outline:hover {
    background: var(--accent);
    color: var(--primary);
    transform: translateY(-2px);
}

.btn-lg {
    padding: 18px 40px;
    font-size: 1.1rem;
}

.btn-sm {
    padding: 10px 20px;
    font-size: 0.875rem;
}

.section {
    padding: 40px 0;
    position: relative;
}

.section-dark {
    background: var(--dark);
}

.section-primary {
    background: var(--gradient-1);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-muted);
    text-align: center;
    max-width: 600px;
    margin: 0 auto 60px;
}

.text-accent {
    color: var(--accent);
}

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

/* Header / Nav */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(26, 26, 46, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition);
}

.header.scrolled {
    background: rgba(10, 10, 26, 0.98);
    box-shadow: 0 2px 30px rgba(0, 0, 0, 0.3);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text);
    text-decoration: none;
}

.logo-icon {
    width: 36px;
    height: 36px;
    object-fit: contain;
}

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

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

.nav a {
    color: var(--text-muted);
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition);
}

.nav a:hover,
.nav a.active {
    color: var(--text);
    background: rgba(255, 255, 255, 0.08);
}

.nav .lang-btn {
    background: rgba(255, 255, 255, 0.06);
    padding: 8px 12px;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
    color: var(--text-muted);
    border: 1px solid rgba(255, 255, 255, 0.08);
    transition: var(--transition);
}

.nav .lang-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text);
}

.lang-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--secondary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius);
    padding: 8px;
    min-width: 160px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition);
    box-shadow: var(--shadow-lg);
    z-index: 100;
}

.lang-dropdown.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-dropdown a {
    display: block;
    padding: 10px 16px;
    color: var(--text-muted);
    border-radius: 6px;
    font-size: 0.9rem;
    transition: var(--transition);
}

.lang-dropdown a:hover {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text);
}

.lang-wrapper {
    position: relative;
}

.menu-toggle {
    display: none;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 8px;
    cursor: pointer;
    align-items: center;
    justify-content: center;
    color: var(--text);
    font-size: 1.2rem;
}

/* Hero */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: var(--gradient-hero);
    position: relative;
    overflow: hidden;
    padding-top: 70px;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 30% 50%, rgba(15, 52, 96, 0.4) 0%, transparent 50%),
                radial-gradient(circle at 70% 20%, rgba(226, 183, 20, 0.08) 0%, transparent 40%);
    pointer-events: none;
}

.hero-particles {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
}

.hero-particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--accent);
    border-radius: 50%;
    opacity: 0.15;
    animation: float 8s infinite ease-in-out;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 20px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(226, 183, 20, 0.1);
    border: 1px solid rgba(226, 183, 20, 0.2);
    color: var(--accent);
    padding: 8px 20px;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 30px;
}

.hero h1 {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 20px;
    background: linear-gradient(135deg, #ffffff 0%, #b0b0c8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero h1 .highlight {
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 60px;
}

.hero-stats {
    display: flex;
    gap: 40px;
    justify-content: center;
    flex-wrap: wrap;
}

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

.hero-stat-number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--accent);
    display: block;
}

.hero-stat-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-top: 4px;
    display: block;
}

/* Features */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.feature-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-lg);
    padding: 40px 30px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-accent);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-6px);
    border-color: rgba(226, 183, 20, 0.2);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: rgba(226, 183, 20, 0.1);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--accent);
    margin-bottom: 24px;
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* Pricing */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.pricing-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-lg);
    padding: 40px 30px;
    text-align: center;
    transition: var(--transition);
    position: relative;
}

.pricing-card.popular {
    border-color: var(--accent);
    background: rgba(226, 183, 20, 0.04);
    transform: scale(1.05);
}

.pricing-card.popular::before {
    content: attr(data-badge);
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gradient-accent);
    color: var(--primary);
    padding: 4px 20px;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 700;
    white-space: nowrap;
}

.pricing-card:hover {
    transform: translateY(-8px);
    border-color: rgba(226, 183, 20, 0.2);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.pricing-card.popular:hover {
    transform: scale(1.05) translateY(-8px);
}

.pricing-name {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.pricing-price {
    font-size: 3rem;
    font-weight: 800;
    color: var(--text);
    margin-bottom: 8px;
}

.pricing-price span {
    font-size: 1rem;
    font-weight: 400;
    color: var(--text-muted);
}

.pricing-desc {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 30px;
}

.pricing-features {
    text-align: left;
    margin-bottom: 30px;
}

.pricing-features li {
    padding: 10px 0;
    color: var(--text-muted);
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 10px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.pricing-features li:last-child {
    border-bottom: none;
}

.pricing-features li::before {
    content: '✓';
    color: var(--accent);
    font-weight: 700;
}

/* CTA section */
.cta-section {
    background: var(--gradient-1);
    text-align: center;
    padding: 80px 0;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 50%, rgba(226, 183, 20, 0.06) 0%, transparent 60%);
}

.cta-section h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.cta-section p {
    color: var(--text-muted);
    font-size: 1.1rem;
    margin-bottom: 40px;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

/* Footer */
.footer {
    background: var(--darker);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding: 80px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 30px;
}

.footer-brand p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-top: 16px;
    line-height: 1.7;
    max-width: 300px;
}

.footer h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text);
}

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

.footer ul li a {
    color: var(--text-muted);
    font-size: 0.9rem;
    transition: var(--transition);
}

.footer ul li a:hover {
    color: var(--accent);
    padding-left: 4px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding-top: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

.footer-bottom p {
    color: var(--text-dark);
    font-size: 0.85rem;
}

/* Page Header */
.page-header {
    padding: 140px 0 20px;
    background: var(--gradient-hero);
    text-align: center;
    position: relative;
}

.page-header h1 {
    font-size: 2.8rem;
    font-weight: 800;
    margin-bottom: 12px;
}

.page-header p {
    color: var(--text-muted);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

/* Download page */
.download-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    max-width: 800px;
    margin: 0 auto;
}

.download-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-lg);
    padding: 40px 30px;
    text-align: center;
    transition: var(--transition);
    text-decoration: none;
    color: var(--text);
    display: block;
}

.download-card:hover {
    transform: translateY(-6px);
    border-color: rgba(226, 183, 20, 0.2);
    color: var(--text);
    box-shadow: var(--shadow-lg);
}

.download-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 20px;
    background: rgba(226, 183, 20, 0.08);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--accent);
}

.download-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.download-card p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.download-btn {
    display: inline-block;
    margin-top: 18px;
    padding: 10px 28px;
    background: var(--gradient-accent);
    color: #0a0a1a;
    border-radius: 8px;
    font-weight: 700;
    font-size: 0.95rem;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(226, 183, 20, 0.3);
}

/* Blog page */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.blog-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-lg);
    padding: 30px;
    transition: var(--transition);
}

.blog-card:hover {
    transform: translateY(-4px);
    border-color: rgba(226, 183, 20, 0.15);
    box-shadow: var(--shadow-lg);
}

.blog-tag {
    display: inline-block;
    background: rgba(226, 183, 20, 0.1);
    color: var(--accent);
    padding: 4px 12px;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 500;
    margin-bottom: 16px;
}

.blog-date {
    color: var(--text-dark);
    font-size: 0.85rem;
    margin-bottom: 8px;
}

.blog-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 12px;
    line-height: 1.4;
}

.blog-card p {
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.7;
    margin-bottom: 16px;
}

.blog-card .read-more {
    color: var(--accent);
    font-weight: 600;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.blog-card .read-more:hover {
    gap: 10px;
}

/* About page */
.about-content {
    max-width: 800px;
    margin: 0 auto;
}

.about-content p {
    color: var(--text-muted);
    font-size: 1.05rem;
    line-height: 1.8;
    margin-bottom: 24px;
}

.about-mission {
    background: rgba(226, 183, 20, 0.04);
    border: 1px solid rgba(226, 183, 20, 0.1);
    border-radius: var(--radius-lg);
    padding: 40px;
    margin: 40px 0;
    text-align: center;
}

.about-mission h3 {
    font-size: 1.5rem;
    margin-bottom: 16px;
    color: var(--accent);
}

.about-mission p {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 0;
}

.about-values {
    display: grid;
    gap: 20px;
    margin-top: 40px;
}

.about-value-item {
    display: flex;
    gap: 20px;
    padding: 24px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius);
    transition: var(--transition);
}

.about-value-item:hover {
    border-color: rgba(226, 183, 20, 0.15);
    transform: translateX(4px);
}

.about-value-icon {
    width: 48px;
    height: 48px;
    min-width: 48px;
    background: rgba(226, 183, 20, 0.08);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    font-size: 1.2rem;
}

.about-value-item h4 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 6px;
}

.about-value-item p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 0;
}

/* Legal pages (privacy, terms) */
.legal-content {
    max-width: 800px;
    margin: 0 auto;
}

.legal-content h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 40px 0 16px;
    color: var(--accent);
}

.legal-content h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin: 30px 0 12px;
}

.legal-content p {
    color: var(--text-muted);
    font-size: 1rem;
    line-height: 1.8;
    margin-bottom: 16px;
}

.legal-content ul {
    margin: 16px 0;
    padding-left: 24px;
}

.legal-content ul li {
    color: var(--text-muted);
    margin-bottom: 8px;
    list-style: disc;
}

.legal-content ul li::marker {
    color: var(--accent);
}

.legal-date {
    color: var(--text-dark);
    font-size: 0.9rem;
    margin-bottom: 30px;
}

/* FAQ */
.faq-grid {
    max-width: 700px;
    margin: 0 auto;
}

.faq-item {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius);
    margin-bottom: 16px;
    transition: var(--transition);
}

.faq-item:hover {
    border-color: rgba(226, 183, 20, 0.1);
}

.faq-question {
    padding: 20px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
    user-select: none;
}

.faq-question .faq-toggle {
    color: var(--accent);
    font-size: 1.2rem;
    transition: var(--transition);
}

.faq-item.active .faq-question .faq-toggle {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    padding: 0 24px;
}

.faq-item.active .faq-answer {
    max-height: 300px;
    padding: 0 24px 20px;
}

.faq-answer p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* Sitemap */
.sitemap-list {
    max-width: 600px;
    margin: 0 auto;
}

.sitemap-list li {
    margin-bottom: 12px;
}

.sitemap-list li a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 20px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius);
    color: var(--text-muted);
    font-size: 1rem;
    transition: var(--transition);
}

.sitemap-list li a:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(226, 183, 20, 0.2);
    color: var(--accent);
    transform: translateX(4px);
}

/* 404 page */
.error-page {
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 100px 20px;
}

.error-code {
    font-size: 8rem;
    font-weight: 800;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 20px;
}

.error-page h2 {
    font-size: 2rem;
    margin-bottom: 16px;
}

.error-page p {
    color: var(--text-muted);
    margin-bottom: 30px;
}

/* Back to top */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    background: var(--accent);
    color: var(--primary);
    border: none;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(226, 183, 20, 0.3);
    z-index: 999;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 6px 25px rgba(226, 183, 20, 0.4);
}

/* Animations */
@keyframes float {
    0%, 100% { transform: translateY(0) scale(1); opacity: 0.15; }
    50% { transform: translateY(-30px) scale(1.2); opacity: 0.3; }
}

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

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

/* Responsive */
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }

    .nav {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: rgba(10, 10, 26, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 20px;
        gap: 4px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        display: none;
    }

    .nav.open {
        display: flex;
    }

    .nav a {
        width: 100%;
        padding: 14px 16px;
    }

    .lang-wrapper {
        width: 100%;
    }

    .lang-wrapper .lang-btn {
        width: 100%;
        justify-content: center;
    }

    .lang-dropdown {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        display: none;
        margin-top: 8px;
    }

    .lang-dropdown.show {
        display: block;
    }

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

    .hero p {
        font-size: 1.05rem;
    }

    .hero-stats {
        gap: 24px;
    }

    .section-title {
        font-size: 2rem;
    }

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

    .pricing-card.popular {
        transform: none;
    }

    .pricing-card.popular:hover {
        transform: translateY(-8px);
    }

    .download-grid {
        grid-template-columns: 1fr;
    }

    .blog-grid {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }

    .page-header h1 {
        font-size: 2rem;
    }
}

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

    .hero-buttons .btn {
        width: 100%;
    }

    .section {
        padding: 60px 0;
    }

    .pricing-price {
        font-size: 2.5rem;
    }
}
.sys-req-grid { grid-template-columns: repeat(4,1fr); }
@media (max-width: 768px) {
    .sys-req-grid { grid-template-columns: repeat(2,1fr); }
}