/* ==================== */
/* Reset & Base Styles  */
/* ==================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --bg-primary: #0a0a1a;
    --bg-secondary: #0f0f2a;
    --bg-card: #141432;
    --bg-card-hover: #1a1a40;
    --accent-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --accent-gradient-hover: linear-gradient(135deg, #7b8ef8 0%, #8b5fc7 100%);
    --text-primary: #ffffff;
    --text-secondary: #8b8ba7;
    --text-muted: #5a5a7a;
    --accent: #667eea;
    --accent-glow: rgba(102, 126, 234, 0.4);
    --border: rgba(255, 255, 255, 0.06);
    --border-hover: rgba(102, 126, 234, 0.3);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', 'Microsoft YaHei', 'PingFang SC', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

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

/* ==================== */
/* Navigation           */
/* ==================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(10, 10, 26, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--text-primary);
}

.logo-img {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    transition: transform 0.3s ease;
}

.logo:hover .logo-img {
    transform: rotate(-5deg) scale(1.05);
}

.logo-text {
    font-size: 1.125rem;
    font-weight: 600;
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    gap: 36px;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9375rem;
    transition: color 0.3s ease;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-gradient);
    transition: width 0.3s ease;
}

.nav-links a:hover {
    color: var(--text-primary);
}

.nav-links a:hover::after {
    width: 100%;
}

.lang-switcher {
    display: flex;
    gap: 6px;
}

.lang-btn {
    padding: 6px 14px;
    border-radius: 8px;
    text-decoration: none;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-secondary);
    background: transparent;
    border: 1px solid var(--border);
    transition: all 0.3s ease;
}

.lang-btn.active {
    background: var(--accent);
    color: var(--text-primary);
    border-color: var(--accent);
}

.lang-btn:hover:not(.active) {
    border-color: var(--border-hover);
    color: var(--text-primary);
}

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

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all 0.3s ease;
}

/* ==================== */
/* Hero Section         */
/* ==================== */
.hero {
    padding: 140px 0 60px;
    position: relative;
    overflow: hidden;
    background: radial-gradient(ellipse at 30% 20%, rgba(102, 126, 234, 0.15) 0%, transparent 50%),
                radial-gradient(ellipse at 70% 80%, rgba(118, 75, 162, 0.1) 0%, transparent 50%),
                var(--bg-primary);
}

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

.hero .container {
    position: relative;
    z-index: 1;
}

.hero-content {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 48px;
    animation: fadeInUp 0.8s ease;
}

.hero-badge {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(102, 126, 234, 0.15);
    border: 1px solid rgba(102, 126, 234, 0.3);
    border-radius: 20px;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--accent);
    margin-bottom: 24px;
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 20px;
    letter-spacing: -0.03em;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
    font-weight: 300;
}

.hero-desc {
    font-size: 1rem;
    color: var(--text-muted);
    margin-bottom: 32px;
}

.hero-cta-group {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 16px;
}

.cta-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 32px;
    background: var(--accent-gradient);
    color: var(--text-primary);
    text-decoration: none;
    border-radius: 12px;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px var(--accent-glow);
}

.cta-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px var(--accent-glow);
    background: var(--accent-gradient-hover);
}

.cta-icon {
    flex-shrink: 0;
}

.hero-free {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

/* Hero Showcase (Screenshot Carousel) */
.hero-showcase {
    position: relative;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.showcase-wrapper {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 25px 80px rgba(0, 0, 0, 0.6),
                0 0 0 1px rgba(255, 255, 255, 0.05);
    max-width: 1200px;
    margin: 0 auto;
}

.showcase-track {
    display: flex;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.showcase-slide {
    min-width: 100%;
    aspect-ratio: 16/9;
    object-fit: contain;
    background: #000;
}

.showcase-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    opacity: 0;
}

.showcase-wrapper:hover .showcase-nav {
    opacity: 1;
}

.showcase-nav:hover {
    background: var(--accent);
    border-color: var(--accent);
    transform: translateY(-50%) scale(1.1);
}

.showcase-nav.prev { left: 16px; }
.showcase-nav.next { right: 16px; }

.showcase-dots {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
}

.showcase-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    cursor: pointer;
    transition: all 0.3s ease;
}

.showcase-dot.active {
    background: var(--accent);
    width: 24px;
    border-radius: 4px;
}

/* ==================== */
/* Features Section     */
/* ==================== */
.features {
    padding: 120px 0;
    background: var(--bg-secondary);
    position: relative;
}

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

.section-title {
    font-size: 2.75rem;
    font-weight: 700;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
}

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

.feature-card {
    position: relative;
    background: var(--bg-card);
    border-radius: 16px;
    padding: 32px;
    border: 1px solid var(--border);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
}

.feature-glow {
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 0%, rgba(102, 126, 234, 0.15) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.feature-card:hover {
    transform: translateY(-8px);
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
}

.feature-card:hover .feature-glow {
    opacity: 1;
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
    transition: transform 0.3s ease;
}

.feature-card:hover .feature-icon {
    transform: scale(1.15) rotate(-5deg);
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.7;
}

/* ==================== */
/* Gallery Section      */
/* ==================== */
.gallery {
    padding: 120px 0;
    background: var(--bg-primary);
    position: relative;
    overflow: hidden;
}

.gallery::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(102, 126, 234, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

.gallery-carousel-wrapper {
    position: relative;
    margin-top: 48px;
}

.gallery-carousel {
    position: relative;
    overflow: hidden;
    border-radius: 16px;
    margin: 0 -24px;
    padding: 0 24px;
}

.gallery-track {
    display: flex;
    gap: 20px;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.gallery-item {
    flex: 0 0 calc(25% - 15px);
    aspect-ratio: 16/10;
    border-radius: 12px;
    overflow: hidden;
    position: relative;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.gallery-item::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.6) 0%, transparent 50%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.gallery-item:hover {
    transform: scale(1.05);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    z-index: 1;
}

.gallery-item:hover::after {
    opacity: 1;
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.gallery-item:hover img {
    transform: scale(1.1);
}

.gallery-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: rgba(10, 10, 26, 0.8);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    z-index: 10;
}

.gallery-nav:hover {
    background: var(--accent);
    border-color: var(--accent);
    transform: translateY(-50%) scale(1.1);
}

.gallery-nav.prev { left: 8px; }
.gallery-nav.next { right: 8px; }

.gallery-dots {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 32px;
}

.gallery-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-muted);
    cursor: pointer;
    transition: all 0.3s ease;
}

.gallery-dot.active {
    background: var(--accent);
    width: 32px;
    border-radius: 4px;
}

/* ==================== */
/* Pricing Section      */
/* ==================== */
.pricing {
    padding: 120px 0;
    background: var(--bg-secondary);
    position: relative;
}

.pricing-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    max-width: 800px;
    margin: 0 auto 24px;
}

.pricing-card {
    background: var(--bg-card);
    border-radius: 20px;
    padding: 40px;
    border: 1px solid var(--border);
    text-align: center;
    position: relative;
    transition: all 0.4s ease;
}

.pricing-card:hover {
    transform: translateY(-8px);
    border-color: var(--border-hover);
}

.pricing-card.featured {
    border-color: var(--accent);
    background: linear-gradient(180deg, rgba(102, 126, 234, 0.1) 0%, var(--bg-card) 100%);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent-gradient);
    color: var(--text-primary);
    padding: 6px 20px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.pricing-tier {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.pricing-price {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 4px;
    letter-spacing: -0.03em;
}

.pricing-desc {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-bottom: 24px;
}

.pricing-features {
    list-style: none;
    margin-bottom: 32px;
    text-align: left;
}

.pricing-features li {
    padding: 12px 0;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 10px;
}

.pricing-features li::before {
    content: '✓';
    color: var(--accent);
    font-weight: 600;
}

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

.pricing-btn {
    display: inline-block;
    padding: 16px 32px;
    background: transparent;
    color: var(--text-primary);
    text-decoration: none;
    border-radius: 12px;
    font-weight: 600;
    border: 2px solid var(--border);
    transition: all 0.3s ease;
    width: 100%;
}

.pricing-btn.featured {
    background: var(--accent-gradient);
    border-color: transparent;
    box-shadow: 0 4px 20px var(--accent-glow);
}

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

.pricing-btn.featured:hover {
    box-shadow: 0 8px 30px var(--accent-glow);
}

.pricing-note {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

/* ==================== */
/* Footer               */
/* ==================== */
.footer {
    padding: 64px 0 40px;
    background: var(--bg-primary);
    border-top: 1px solid var(--border);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr 1fr;
    gap: 48px;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.footer-logo {
    width: 48px;
    height: 48px;
    border-radius: 12px;
}

.footer-brand p {
    color: var(--text-muted);
    font-size: 0.875rem;
}

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

.footer-col h4 {
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
}

.footer-col a {
    display: block;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.875rem;
    margin-bottom: 12px;
    transition: color 0.3s ease;
}

.footer-col a:hover {
    color: var(--text-primary);
}

.footer-social {
    display: flex;
    gap: 16px;
    justify-content: flex-end;
}

.footer-social a {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: var(--bg-card);
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    font-size: 1.25rem;
    transition: all 0.3s ease;
}

.footer-social a:hover {
    background: var(--accent);
    transform: translateY(-3px);
}

/* ==================== */
/* Reveal Animations    */
/* ==================== */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

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

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

@keyframes pulse {
    0%, 100% { opacity: 0.4; }
    50% { opacity: 0.8; }
}

/* Particle Animation */
.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--accent);
    border-radius: 50%;
    opacity: 0;
    animation: particleFloat 8s infinite;
}

@keyframes particleFloat {
    0% {
        opacity: 0;
        transform: translateY(100vh) scale(0);
    }
    10% {
        opacity: 0.6;
    }
    90% {
        opacity: 0.6;
    }
    100% {
        opacity: 0;
        transform: translateY(-100px) scale(1);
    }
}

/* ==================== */
/* Responsive Design    */
/* ==================== */
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .gallery-item {
        flex: 0 0 calc(33.333% - 14px);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-social {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .nav-links, .lang-switcher {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero {
        padding: 100px 0 40px;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.25rem;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .gallery-item {
        flex: 0 0 calc(50% - 10px);
    }
    
    .pricing-cards {
        grid-template-columns: 1fr;
    }
    
    .pricing-card.featured {
        transform: none;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
    
    .showcase-nav {
        width: 40px;
        height: 40px;
    }
    
    .gallery-nav {
        width: 44px;
        height: 44px;
    }
}