:root {
    --primary: #8B5CF6;
    --primary-glow: #A78BFA;
    --accent: #F59E0B;
    --accent-glow: #FCD34D;
    --dark: #0F0A1A;
    --darker: #080510;
    --card: #1A1025;
    --card-border: #2D1B4E;
    --text: #F3F4F6;
    --text-muted: #9CA3AF;
    --success: #10B981;
    --danger: #EF4444;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: var(--darker);
    color: var(--text);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
}
::-webkit-scrollbar-track {
    background: var(--darker);
}
::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 3px;
}

/* Particle Background */
.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(--primary-glow);
    border-radius: 50%;
    animation: float 15s infinite linear;
    opacity: 0.5;
}
@keyframes float {
    0% { transform: translateY(100vh) rotate(0deg); opacity: 0; }
    10% { opacity: 0.5; }
    90% { opacity: 0.5; }
    100% { transform: translateY(-10vh) rotate(720deg); opacity: 0; }
}

/* Navigation */
nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: transparent;
    backdrop-filter: blur(0px);
    -webkit-backdrop-filter: blur(0px);
    border-bottom: 1px solid transparent;
    transition: all 0.3s ease;
}
nav.scrolled,
nav.menu-open {
    background: rgba(8, 5, 16, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(139, 92, 246, 0.1);
    box-shadow: 0 4px 30px rgba(139, 92, 246, 0.15);
}
.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 60px;
}
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-glow);
    text-decoration: none;
}
.logo img {
    width: 40px;
    height: 40px;
    border-radius: 10px;
}
.nav-links {
    display: flex;
    gap: 30px;
    list-style: none;
}
.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
}
.nav-links a:hover {
    color: var(--primary-glow);
}
.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    transition: width 0.3s ease;
    border-radius: 1px;
}
.nav-links a:hover::after {
    width: 100%;
}
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text);
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding-top: 60px;
}
.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 1;
}
.hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.6;
}
.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(8,5,16,0.3) 0%, rgba(8,5,16,0.7) 60%, var(--darker) 100%);
    z-index: 2;
}
.hero-content {
    position: relative;
    z-index: 3;
    text-align: center;
    max-width: 900px;
    padding: 0 20px;
    animation: fadeInUp 1s ease;
}
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(40px); }
    to { opacity: 1; transform: translateY(0); }
}
.hero-badge {
    display: inline-block;
    padding: 6px 20px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 700;
    margin-bottom: 20px;
    box-shadow: 0 4px 20px rgba(139, 92, 246, 0.4);
    animation: pulse 2s infinite;
}
@keyframes pulse {
    0%, 100% { box-shadow: 0 4px 20px rgba(139, 92, 246, 0.4); }
    50% { box-shadow: 0 4px 30px rgba(139, 92, 246, 0.7); }
}
.hero h1 {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 20px;
    background: linear-gradient(135deg, #fff, var(--primary-glow), var(--accent-glow));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 60px rgba(139, 92, 246, 0.3);
}
.hero-subtitle {
    font-size: clamp(1rem, 2.5vw, 1.4rem);
    color: var(--text-muted);
    margin-bottom: 30px;
    line-height: 1.6;
}
.hero-tags {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 40px;
}
.tag {
    padding: 8px 20px;
    background: rgba(139, 92, 246, 0.15);
    border: 1px solid rgba(139, 92, 246, 0.3);
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--primary-glow);
    font-weight: 600;
}
.tag.highlight {
    background: rgba(245, 158, 11, 0.15);
    border-color: rgba(245, 158, 11, 0.4);
    color: var(--accent-glow);
}
.cta-group {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}
.btn {
    padding: 14px 36px;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    border: none;
    position: relative;
    overflow: hidden;
}
.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #FFFFFF;
    width: 136px;
    height: 53px;
    gap: 8px;
    padding-left: 36px;
    padding-right: 36px;
    padding-top: 14px;
    padding-bottom: 14px;
    border-radius: 50px;
    box-shadow: 0 4px 25px rgba(139, 92, 246, 0.5);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 35px rgba(139, 92, 246, 0.7);
}
.btn-secondary {
    background: transparent;
    color: var(--text);
    border: 2px solid rgba(255, 255, 255, 0.2);
}
.btn-secondary:hover {
    border-color: var(--primary-glow);
    background: rgba(139, 92, 246, 0.1);
}
.hero-scroll {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
    animation: bounce 2s infinite;
}
@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-10px); }
    60% { transform: translateX(-50%) translateY(-5px); }
}
.hero-scroll span {
    display: block;
    width: 24px;
    height: 40px;
    border: 2px solid rgba(255,255,255,0.3);
    border-radius: 12px;
    position: relative;
}
.hero-scroll span::after {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: var(--primary-glow);
    border-radius: 2px;
    animation: scrollWheel 2s infinite;
}
@keyframes scrollWheel {
    0% { opacity: 1; top: 8px; }
    100% { opacity: 0; top: 20px; }
}

/* Section Styles */
section {
    position: relative;
    z-index: 1;
    padding: 80px 20px;
}
.section-container {
    max-width: 1200px;
    margin: 0 auto;
}
.section-header {
    text-align: center;
    margin-bottom: 50px;
}
.section-label {
    display: inline-block;
    padding: 4px 16px;
    background: rgba(139, 92, 246, 0.15);
    border: 1px solid rgba(139, 92, 246, 0.3);
    border-radius: 50px;
    font-size: 0.8rem;
    color: var(--primary-glow);
    font-weight: 600;
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 2px;
}
.section-title {
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    font-weight: 800;
    margin-bottom: 12px;
    background: linear-gradient(135deg, #fff, var(--primary-glow));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.section-desc {
    color: var(--text-muted);
    font-size: 1rem;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

/* Intro Section */
.intro-section {
    background: linear-gradient(180deg, var(--darker) 0%, var(--dark) 50%, var(--darker) 100%);
}
.intro-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}
.intro-image {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(139, 92, 246, 0.2);
}
.intro-image img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.5s ease;
}
.intro-image:hover img {
    transform: scale(1.05);
}
.intro-image::before {
    content: '';
    position: absolute;
    inset: 0;
    border: 2px solid transparent;
    border-radius: 20px;
    background: linear-gradient(135deg, var(--primary), var(--accent)) border-box;
    -webkit-mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
}
.intro-content h3 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text);
}
.intro-content p {
    color: var(--text-muted);
    line-height: 1.8;
    font-size: 1rem;
    margin-bottom: 24px;
}
.intro-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}
.stat-item {
    text-align: center;
    padding: 20px;
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    transition: all 0.3s ease;
}
.stat-item:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
    box-shadow: 0 10px 30px rgba(139, 92, 246, 0.2);
}
.stat-number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary-glow);
    line-height: 1;
}
.stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 8px;
}

/* Features/Welfare Section */
.features-section {
    background: var(--dark);
}
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.feature-card {
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    padding: 30px;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}
.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    transform: scaleX(0);
    transition: transform 0.4s ease;
}
.feature-card:hover::before {
    transform: scaleX(1);
}
.feature-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary);
    box-shadow: 0 20px 40px rgba(139, 92, 246, 0.2);
}
.feature-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 20px;
    box-shadow: 0 8px 20px rgba(139, 92, 246, 0.3);
}
.feature-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text);
}
.feature-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
}
.feature-card .highlight-text {
    color: var(--accent-glow);
    font-weight: 700;
}

/* Screenshots Section */
.screenshots-section {
    background: linear-gradient(180deg, var(--dark) 0%, var(--darker) 100%);
    overflow: hidden;
}
.screenshots-carousel {
    position: relative;
}
.screenshots-track {
    display: flex;
    gap: 20px;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scroll-behavior: smooth;
    padding: 20px 0;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}
.screenshots-track::-webkit-scrollbar {
    display: none;
}
.screenshot-item {
    flex: 0 0 auto;
    scroll-snap-align: center;
    width: 280px;
    border-radius: 16px;
    overflow: hidden;
    border: 2px solid var(--card-border);
    transition: all 0.3s ease;
    cursor: pointer;
}
.screenshot-item:hover {
    transform: scale(1.05);
    border-color: var(--primary);
    box-shadow: 0 15px 40px rgba(139, 92, 246, 0.3);
}
.screenshot-item img {
    width: 100%;
    height: auto;
    display: block;
}
.screenshot-nav {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-top: 30px;
}
.screenshot-nav button {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: 2px solid var(--primary);
    background: transparent;
    cursor: pointer;
    transition: all 0.3s ease;
}
.screenshot-nav button.active {
    background: var(--primary);
    box-shadow: 0 0 10px var(--primary-glow);
}

/* Gallery (Five Pics) */
.gallery-section {
    background: var(--darker);
}
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}
.gallery-item {
    border-radius: 16px;
    overflow: hidden;
    border: 2px solid var(--card-border);
    transition: all 0.4s ease;
    position: relative;
    aspect-ratio: 9/16;
}
.gallery-item:hover {
    transform: translateY(-8px) scale(1.02);
    border-color: var(--primary);
    box-shadow: 0 20px 50px rgba(139, 92, 246, 0.3);
}
.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* Download Section */
.download-section {
    background: linear-gradient(135deg, var(--dark) 0%, var(--card) 100%);
    position: relative;
    overflow: hidden;
}
.download-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.15) 0%, transparent 70%);
    pointer-events: none;
}
.download-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
    flex-wrap: wrap;
}
.download-info {
    flex: 1;
    min-width: 300px;
}
.download-info h2 {
    font-size: 2.2rem;
    font-weight: 800;
    margin-bottom: 16px;
    background: linear-gradient(135deg, #fff, var(--primary-glow));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.download-info p {
    color: var(--text-muted);
    margin-bottom: 30px;
    line-height: 1.6;
}
.download-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}
.download-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 28px;
    background: var(--card);
    border: 2px solid var(--card-border);
    border-radius: 16px;
    color: var(--text);
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
}
.download-btn:hover {
    border-color: var(--primary);
    background: rgba(139, 92, 246, 0.1);
    transform: translateY(-3px);
}
.download-btn .icon {
    font-size: 1.5rem;
}
.download-btn .text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}
.download-btn .small {
    font-size: 0.75rem;
    color: var(--text-muted);
}
.download-btn .large {
    font-size: 1rem;
    font-weight: 700;
}
.download-qr {
    width: 160px;
    height: 160px;
    background: #fff;
    border-radius: 16px;
    padding: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}
.download-qr #downloadQr {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}
.download-qr #downloadQr canvas,
.download-qr #downloadQr img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 8px;
}
.download-qr::after {
    content: '扫码下载';
    position: absolute;
    bottom: -30px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.85rem;
    color: var(--text-muted);
    white-space: nowrap;
}

/* Hero download QR popup */
.hero-download-wrap {
    position: relative;
    display: inline-flex;
}
.hero-qr-popup {
    position: absolute;
    bottom: calc(100% + 18px);
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    background: #fff;
    padding: 12px 12px 8px;
    border-radius: 14px;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    z-index: 50;
    pointer-events: none;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}
.hero-qr-popup::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 8px solid transparent;
    border-top-color: #fff;
}
.hero-qr-popup #heroQr {
    width: 120px;
    height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.hero-qr-popup #heroQr canvas,
.hero-qr-popup #heroQr img {
    width: 100%;
    height: 100%;
    border-radius: 8px;
}
.hero-qr-text {
    font-size: 0.7rem;
    color: #666;
    white-space: nowrap;
    font-weight: 600;
}
@media (hover: hover) {
    .hero-download-wrap:hover .hero-qr-popup {
        opacity: 1;
        visibility: visible;
        transform: translateX(-50%) translateY(0);
    }
}

/* Footer */
footer {
    background: var(--darker);
    border-top: 1px solid var(--card-border);
    padding: 40px 20px;
    text-align: center;
    position: relative;
    z-index: 1;
}
.footer-content {
    max-width: 1200px;
    margin: 0 auto;
}
.footer-logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-glow);
    margin-bottom: 16px;
}
.footer-links {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}
.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}
.footer-links a:hover {
    color: var(--primary-glow);
}
.footer-friend-links {
    margin-bottom: 20px;
    padding: 16px 24px;
    background: rgba(26, 16, 37, 0.5);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}
.friend-links-title {
    color: var(--text-muted);
    font-size: 0.85rem;
    white-space: nowrap;
    position: relative;
    padding-right: 16px;
}
.friend-links-title::after {
    content: '';
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 1px;
    height: 14px;
    background: var(--card-border);
}
.friend-links {
    display: flex;
    gap: 8px 20px;
    flex-wrap: wrap;
    justify-content: center;
}
.friend-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.85rem;
    opacity: 0.75;
    transition: all 0.3s ease;
}
.friend-links a:hover {
    color: var(--primary-glow);
    opacity: 1;
}
.footer-copy {
    color: var(--text-muted);
    font-size: 0.85rem;
    opacity: 0.6;
}

/* Lightbox */
.lightbox {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.95);
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}
.lightbox.active {
    display: flex;
    opacity: 1;
}
.lightbox img {
    max-width: 90vw;
    max-height: 90vh;
    border-radius: 12px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}
.lightbox-close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
    background: rgba(255,255,255,0.1);
    border: none;
    border-radius: 50%;
    color: #fff;
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.3s ease;
}
.lightbox-close:hover {
    background: rgba(255,255,255,0.2);
}

/* Toast */
#toast {
    position: fixed;
    bottom: 80px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--card);
    border: 1px solid var(--primary);
    color: var(--text);
    padding: 12px 24px;
    border-radius: 12px;
    z-index: 3000;
    transition: transform 0.3s ease;
    font-size: 0.9rem;
    box-shadow: 0 10px 30px rgba(139,92,246,0.3);
}

/* Back to Top Button */
#backToTop {
    position: fixed;
    bottom: 40px;
    right: 30px;
    width: 48px;
    height: 48px;
    border: none;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #fff;
    font-size: 1.2rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(139, 92, 246, 0.4);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s ease;
    z-index: 1500;
}
#backToTop.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
#backToTop:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(139, 92, 246, 0.7);
}

@media (max-width: 480px) {
    #backToTop {
        bottom: 25px;
        right: 16px;
        width: 42px;
        height: 42px;
        font-size: 1rem;
    }
}

/* Animations */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease;
}
.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Glow effects */
.glow-text {
    animation: textGlow 3s ease-in-out infinite alternate;
}
@keyframes textGlow {
    from { text-shadow: 0 0 20px rgba(139, 92, 246, 0.3); }
    to { text-shadow: 0 0 40px rgba(139, 92, 246, 0.6), 0 0 60px rgba(245, 158, 11, 0.3); }
}

/* Floating animation */
.float-animation {
    animation: floatY 4s ease-in-out infinite;
}
@keyframes floatY {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

/* Video section */
.video-section {
    background: var(--dark);
}
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}
.video-card {
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    overflow: hidden;
    transition: all 0.4s ease;
}
.video-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
    box-shadow: 0 15px 40px rgba(139, 92, 246, 0.2);
}
.video-container {
    position: relative;
    padding-bottom: 56.25%;
    background: #000;
}
.video-container video {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.video-info {
    padding: 20px;
}
.video-info h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
}
.video-info p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 60px;
        left: 0;
        right: 0;
        background: rgba(8, 5, 16, 0.98);
        flex-direction: column;
        padding: 20px;
        gap: 16px;
        border-bottom: 1px solid var(--card-border);
    }
    .nav-links.active {
        display: flex;
    }
    .mobile-menu-btn {
        display: block;
    }
    .intro-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .intro-stats {
        grid-template-columns: repeat(3, 1fr);
    }
    .download-content {
        flex-direction: column;
        text-align: center;
    }
    .download-buttons {
        justify-content: center;
    }
    .download-qr {
        margin: 0 auto;
    }
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    section {
        padding: 60px 16px;
    }
    .screenshot-item {
        width: 240px;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 2rem;
    }
    .intro-stats {
        grid-template-columns: 1fr;
    }
    .features-grid {
        grid-template-columns: 1fr;
    }
    .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .cta-group {
        flex-direction: column;
        align-items: stretch;
    }
    .hero-download-wrap,
    .btn {
        width: 100%;
        max-width: none;
        justify-content: center;
    }
    .download-buttons {
        flex-direction: column;
        align-items: stretch;
    }
    .download-btn {
        width: 100%;
        justify-content: center;
    }
    .download-btn .text {
        align-items: center;
    }
}