:root {
    --color-bg-primary: #ffffff;
    --color-bg-secondary: #f8fafc;
    --color-bg-tertiary: #f1f5f9;
    --color-bg-card: #ffffff;
    --color-bg-hover: #e2e8f0;
    --color-border: #e2e8f0;
    --color-border-light: #f1f5f9;
    --color-text-primary: #0f172a;
    --color-text-secondary: #475569;
    --color-text-tertiary: #94a3b8;
    --color-text-muted: #cbd5e1;
    --color-accent-primary: #6366f1;
    --color-accent-secondary: #8b5cf6;
    --color-accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    --color-accent-light: #e0e7ff;
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    --color-info: #3b82f6;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;
}

[data-theme="dark"] {
    --color-bg-primary: #0f172a;
    --color-bg-secondary: #1e293b;
    --color-bg-tertiary: #334155;
    --color-bg-card: #1e293b;
    --color-bg-hover: #334155;
    --color-border: #334155;
    --color-border-light: #475569;
    --color-text-primary: #f8fafc;
    --color-text-secondary: #cbd5e1;
    --color-text-tertiary: #94a3b8;
    --color-text-muted: #64748b;
    --color-accent-light: rgba(99, 102, 241, 0.2);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 10px 10px -5px rgba(0, 0, 0, 0.3);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.6;
    transition: background-color var(--transition-normal), color var(--transition-normal);
    overflow-x: hidden;
}

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

.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--color-bg-primary);
    border-bottom: 1px solid var(--color-border);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: all var(--transition-normal);
}

.nav-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    gap: 24px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--color-text-primary);
    text-decoration: none;
}

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

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: color var(--transition-fast);
    position: relative;
}

.nav-link:hover {
    color: var(--color-accent-primary);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent-gradient);
    transition: width var(--transition-fast);
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.theme-toggle {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    background: var(--color-bg-secondary);
    color: var(--color-text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.theme-toggle:hover {
    border-color: var(--color-accent-primary);
    color: var(--color-accent-primary);
    background: var(--color-accent-light);
}

.sun-icon,
.moon-icon {
    position: absolute;
    transition: opacity var(--transition-fast), transform var(--transition-fast);
}

[data-theme="dark"] .sun-icon {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

[data-theme="dark"] .moon-icon,
.sun-icon {
    opacity: 0;
    transform: rotate(90deg) scale(0);
}

[data-theme="dark"] .moon-icon,
:not([data-theme="dark"]) .sun-icon {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

:not([data-theme="dark"]) .moon-icon {
    opacity: 0;
    transform: rotate(-90deg) scale(0);
}

.btn {
    padding: 10px 20px;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.btn-primary {
    background: var(--color-accent-gradient);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-secondary:hover {
    background: var(--color-bg-tertiary);
}

.btn-ghost {
    background: transparent;
    color: var(--color-text-primary);
}

.btn-ghost:hover {
    background: var(--color-bg-secondary);
}

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

.btn-outline:hover {
    background: var(--color-accent-primary);
    color: white;
}

.btn-lg {
    padding: 14px 28px;
    font-size: 1rem;
}

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

.mobile-menu-btn {
    display: none;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    background: var(--color-bg-secondary);
    color: var(--color-text-secondary);
    cursor: pointer;
    align-items: center;
    justify-content: center;
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-bg-primary);
    z-index: 999;
    padding: 24px;
}

.mobile-menu.active {
    display: block;
}

.mobile-menu-content {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.mobile-nav-link {
    color: var(--color-text-primary);
    text-decoration: none;
    font-size: 1.1rem;
    font-weight: 500;
    padding: 12px 0;
    border-bottom: 1px solid var(--color-border);
}

.hero {
    position: relative;
    padding: 100px 0 80px;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 150%;
    height: 100%;
    background: radial-gradient(ellipse at center top, rgba(99, 102, 241, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--color-accent-light);
    border-radius: 50px;
    color: var(--color-accent-primary);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 24px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

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

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 40px;
}

.hero-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 60px;
}

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 60px;
}

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

.stat-number {
    font-size: 2rem;
    font-weight: 800;
    background: var(--color-accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    color: var(--color-text-tertiary);
    font-size: 0.95rem;
}

.hero-decoration {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    z-index: 0;
}

.floating-card {
    position: absolute;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 20px;
    box-shadow: var(--shadow-xl);
    animation: float 6s ease-in-out infinite;
}

.card-1 {
    top: 15%;
    left: 5%;
    width: 280px;
    animation-delay: 0s;
}

.card-2 {
    top: 25%;
    right: 8%;
    width: 160px;
    animation-delay: -2s;
}

.card-3 {
    bottom: 20%;
    left: 8%;
    width: 180px;
    animation-delay: -4s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
}

.card-header {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 12px;
}

.card-dots {
    display: flex;
    gap: 6px;
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.dot.red {
    background: #ef4444;
}

.dot.yellow {
    background: #f59e0b;
}

.dot.green {
    background: #10b981;
}

.card-content {
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.85rem;
    line-height: 1.8;
}

.card-content code {
    display: block;
}

.comment {
    color: var(--color-text-tertiary);
}

.keyword {
    color: var(--color-accent-primary);
    font-weight: 600;
}

.string {
    color: var(--color-success);
}

.card-icon {
    font-size: 2rem;
    margin-bottom: 8px;
}

.card-text {
    font-weight: 600;
    color: var(--color-text-primary);
}

.section {
    padding: 100px 0;
}

.section-alt {
    background: var(--color-bg-secondary);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-badge {
    display: inline-flex;
    padding: 6px 14px;
    background: var(--color-accent-light);
    border-radius: 50px;
    color: var(--color-accent-primary);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.section-title {
    font-size: 2.75rem;
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: 1.15rem;
    color: var(--color-text-secondary);
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.7;
}

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

.feature-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: all var(--transition-normal);
}

.feature-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-accent-primary);
    box-shadow: var(--shadow-xl);
}

.feature-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    background: var(--color-accent-gradient);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

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

.feature-desc {
    color: var(--color-text-secondary);
    margin-bottom: 20px;
    line-height: 1.6;
}

.feature-list {
    list-style: none;
}

.feature-list li {
    padding: 6px 0;
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.feature-list li::before {
    content: '✓';
    color: var(--color-success);
    font-weight: 700;
}

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

.scenario-card {
    display: flex;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.scenario-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.scenario-image {
    width: 180px;
    background: var(--color-accent-light);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.scenario-icon {
    font-size: 4rem;
}

.scenario-content {
    flex: 1;
    padding: 28px;
}

.scenario-title {
    font-size: 1.35rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.scenario-desc {
    color: var(--color-text-secondary);
    margin-bottom: 20px;
    line-height: 1.6;
}

.scenario-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag {
    padding: 6px 12px;
    background: var(--color-bg-tertiary);
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--color-text-secondary);
}

.roadmap {
    max-width: 900px;
    margin: 0 auto;
}

.roadmap-item {
    display: flex;
    gap: 32px;
    margin-bottom: 40px;
}

.roadmap-milestone {
    flex-shrink: 0;
    width: 160px;
    text-align: right;
}

.milestone-badge {
    display: inline-block;
    padding: 8px 16px;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-md);
    font-weight: 700;
    color: var(--color-text-secondary);
    margin-bottom: 8px;
}

.milestone-badge.active {
    background: var(--color-accent-gradient);
    color: white;
}

.milestone-period {
    color: var(--color-text-tertiary);
    font-size: 0.9rem;
}

.roadmap-content {
    flex: 1;
    padding-left: 32px;
    border-left: 2px solid var(--color-border);
    position: relative;
}

.roadmap-content::before {
    content: '';
    position: absolute;
    left: -8px;
    top: 4px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--color-accent-primary);
    border: 3px solid var(--color-bg-primary);
}

.roadmap-title {
    font-size: 1.35rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.roadmap-list {
    list-style: none;
}

.roadmap-list li {
    padding: 8px 0;
    color: var(--color-text-secondary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.roadmap-list li::before {
    content: '▸';
    color: var(--color-accent-primary);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 1000px;
    margin: 0 auto;
}

.pricing-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 36px;
    position: relative;
    transition: all var(--transition-normal);
}

.pricing-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.pricing-popular {
    border: 2px solid var(--color-accent-primary);
    transform: scale(1.05);
}

.popular-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    padding: 6px 16px;
    background: var(--color-accent-gradient);
    color: white;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 700;
}

.pricing-header {
    text-align: center;
    margin-bottom: 28px;
}

.pricing-name {
    font-size: 1.35rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.pricing-price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 4px;
}

.price-amount {
    font-size: 2.75rem;
    font-weight: 800;
}

.price-period {
    color: var(--color-text-tertiary);
}

.pricing-features {
    list-style: none;
    margin-bottom: 28px;
}

.pricing-features li {
    padding: 10px 0;
    display: flex;
    align-items: center;
    gap: 10px;
}

.feature-included {
    color: var(--color-text-primary);
}

.feature-included::before {
    content: '✓';
    color: var(--color-success);
    font-weight: 700;
    font-size: 1.1rem;
}

.feature-excluded {
    color: var(--color-text-tertiary);
}

.feature-excluded::before {
    content: '✗';
    color: var(--color-text-muted);
}

.cta-section {
    padding: 100px 0;
    background: var(--color-accent-gradient);
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.1'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.cta-content {
    position: relative;
    text-align: center;
    color: white;
}

.cta-title {
    font-size: 2.75rem;
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.cta-subtitle {
    font-size: 1.2rem;
    opacity: 0.95;
    margin-bottom: 36px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.cta-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
}

.cta-section .btn-primary {
    background: white;
    color: var(--color-accent-primary);
}

.cta-section .btn-ghost {
    border: 2px solid rgba(255, 255, 255, 0.5);
    color: white;
}

.cta-section .btn-ghost:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: white;
}

.footer {
    padding: 80px 0 40px;
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
}

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

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.25rem;
    margin-bottom: 16px;
}

.footer-desc {
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.footer-title {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.footer-link {
    display: block;
    color: var(--color-text-secondary);
    text-decoration: none;
    padding: 8px 0;
    transition: color var(--transition-fast);
}

.footer-link:hover {
    color: var(--color-accent-primary);
}

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 32px;
    border-top: 1px solid var(--color-border);
    color: var(--color-text-tertiary);
}

.social-links {
    display: flex;
    gap: 12px;
}

.social-link {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    background: var(--color-bg-tertiary);
    color: var(--color-text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.social-link:hover {
    background: var(--color-accent-primary);
    color: white;
}

hr {
    border: none;
    border-top: 1px solid var(--color-border);
    margin: 16px 0;
}

@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .scenarios-grid {
        grid-template-columns: 1fr;
    }
    
    .pricing-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .pricing-popular {
        transform: none;
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .hero-decoration {
        display: none;
    }
}

@media (max-width: 768px) {
    .nav-links,
    .nav-actions .btn {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero {
        padding: 60px 0 48px;
    }
    
    .hero-title {
        font-size: 2.25rem;
    }
    
    .hero-subtitle {
        font-size: 1.05rem;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .hero-stats {
        gap: 32px;
    }
    
    .section {
        padding: 60px 0;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .scenario-card {
        flex-direction: column;
    }
    
    .scenario-image {
        width: 100%;
        height: 140px;
    }
    
    .roadmap-item {
        flex-direction: column;
        gap: 16px;
    }
    
    .roadmap-milestone {
        width: 100%;
        text-align: left;
    }
    
    .roadmap-content {
        border-left: none;
        padding-left: 0;
        padding-top: 16px;
        border-top: 2px solid var(--color-border);
    }
    
    .roadmap-content::before {
        left: 0;
        top: -8px;
    }
    
    .pricing-grid {
        grid-template-columns: 1fr;
    }
    
    .cta-title {
        font-size: 2rem;
    }
    
    .cta-actions {
        flex-direction: column;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
}