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

:root {
    --primary-color: #3b82f6;
    --primary-dark: #2563eb;
    --primary-light: #60a5fa;
    --secondary-color: #8b5cf6;
    --accent-color: #ec4899;
    --success-color: #10b981;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-alt: #f3f4f6;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-2: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

/* ===== Navbar ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
    background: rgba(255, 255, 255, 0.95);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.logo-icon-img {
    width: 32px;
    height: 32px;
    border-radius: 6px;
}

.logo-icon {
    font-size: 1.8rem;
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    color: var(--text-secondary);
    font-weight: 500;
    transition: color 0.3s ease;
}

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

/* ===== Hero Section ===== */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
}

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

.hero-logo {
    margin-bottom: 2rem;
    display: flex;
    justify-content: center;
}

.hero-logo img {
    width: 120px;
    height: 120px;
    animation: float 3s ease-in-out infinite;
}

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

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.gradient-text {
    background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2.5rem;
    opacity: 0.95;
    line-height: 1.8;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 3rem;
}

.hero-features {
    display: flex;
    gap: 2rem;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-feature {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1rem;
    opacity: 0.9;
}

.feature-icon {
    font-size: 1.5rem;
}

/* ===== Buttons ===== */
.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    border-radius: 0.5rem;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

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

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

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
}

.btn-large {
    padding: 1.125rem 2.5rem;
    font-size: 1.125rem;
}

/* ===== Sections ===== */
.section {
    padding: 80px 0;
}

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

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

.section-subtitle {
    font-size: 1.125rem;
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 3rem;
}

/* ===== Steps Grid ===== */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 3rem;
    margin-top: 3rem;
}

.step {
    text-align: center;
    position: relative;
}

.step-number {
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 40px;
    background: var(--gradient-2);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.25rem;
}

.step-icon {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    margin-top: 1.5rem;
}

.step h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.step p {
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ===== Features Grid ===== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.feature-icon-large {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

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

/* ===== AI Features ===== */
.ai-disclaimer {
    background: #fff3cd;
    border: 2px solid #ffc107;
    border-radius: 0.75rem;
    padding: 1.5rem;
    margin: 2rem auto;
    max-width: 900px;
    text-align: left;
}

.ai-disclaimer p {
    margin: 0;
    color: #856404;
    line-height: 1.7;
    font-size: 1rem;
}

.ai-disclaimer strong {
    color: #664d03;
}

.ai-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.ai-feature {
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    border-left: 4px solid var(--primary-color);
}

.ai-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.ai-feature h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.ai-feature p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.ai-example {
    background: var(--bg-alt);
    padding: 1rem;
    border-radius: 0.5rem;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    color: var(--primary-dark);
    border-left: 3px solid var(--primary-color);
}

.ai-providers {
    margin-top: 4rem;
    text-align: center;
}

.ai-providers h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.ai-providers-note {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-style: italic;
}

.provider-logos {
    display: flex;
    gap: 2rem;
    justify-content: center;
    flex-wrap: wrap;
}

.provider {
    background: white;
    padding: 1rem 2rem;
    border-radius: 0.5rem;
    box-shadow: var(--shadow-sm);
    font-weight: 600;
    color: var(--text-secondary);
}

.ai-cost-note {
    margin-top: 2rem;
    padding: 1rem 2rem;
    background: var(--bg-alt);
    border-radius: 0.5rem;
    font-size: 0.95rem;
    color: var(--text-secondary);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.ai-cost-note strong {
    color: var(--text-primary);
}

/* ===== Models Section ===== */
.model-selection-guide {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

.selection-card {
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    border-left: 4px solid var(--primary-color);
}

.selection-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.selection-card ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.selection-card li {
    padding: 0.75rem 0;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
}

.selection-card li:last-child {
    border-bottom: none;
}

.selection-card strong {
    color: var(--text-primary);
}

.quantization-explanation {
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    margin: 3rem 0;
    text-align: center;
}

.quantization-explanation h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.quantization-explanation > p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 1.125rem;
}

.quantization-types {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.quant-type {
    background: var(--bg-secondary);
    padding: 1.5rem;
    border-radius: 0.75rem;
    border: 2px solid var(--border-color);
}

.quant-type h4 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.quant-type p {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.quant-recommendation {
    color: var(--success-color);
    font-weight: 600;
    margin-top: 0.5rem;
}

.model-category-title {
    font-size: 1.75rem;
    margin: 4rem 0 2rem;
    color: var(--text-primary);
    text-align: center;
}

.models-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.model-card {
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-lg);
    text-align: left;
    position: relative;
    border: 2px solid var(--border-color);
    transition: all 0.3s ease;
}

.model-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.model-card.model-recommended {
    border-color: var(--primary-color);
    border-width: 3px;
}

.model-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gradient-2);
    color: white;
    padding: 0.25rem 1rem;
    border-radius: 1rem;
    font-size: 0.875rem;
    font-weight: 600;
}

.model-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    margin-top: 0.5rem;
    color: var(--text-primary);
    text-align: center;
}

.model-sizes {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.size-standard {
    background: var(--bg-alt);
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 600;
}

.size-quantized {
    background: var(--primary-light);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    font-size: 0.9rem;
    font-weight: 600;
}

.model-specs {
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.spec-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
    flex-wrap: wrap;
}

.spec-label {
    font-weight: 600;
    color: var(--text-secondary);
    min-width: 80px;
}

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

.spec-detail {
    color: var(--text-light);
    font-size: 0.875rem;
    margin-left: auto;
}

.speed-ultra {
    color: var(--success-color);
}

.speed-very-fast {
    color: #22c55e;
}

.speed-fast {
    color: #84cc16;
}

.speed-moderate {
    color: #eab308;
}

.speed-slow {
    color: #f59e0b;
}

.accuracy-fair {
    color: var(--text-light);
}

.accuracy-good {
    color: #84cc16;
}

.accuracy-very-good {
    color: #22c55e;
}

.accuracy-excellent {
    color: var(--success-color);
}

.accuracy-best {
    color: var(--primary-color);
    font-weight: 700;
}

.languages {
    color: var(--primary-color);
}

.model-features {
    list-style: none;
    padding: 0;
    margin: 0;
}

.model-features li {
    padding: 0.5rem 0;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.model-usage-info {
    margin-top: 4rem;
    background: white;
    padding: 2.5rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
}

.model-usage-info h3 {
    font-size: 1.75rem;
    margin-bottom: 2rem;
    color: var(--text-primary);
    text-align: center;
}

.usage-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.usage-card {
    background: var(--bg-secondary);
    padding: 1.5rem;
    border-radius: 0.75rem;
    border-left: 4px solid var(--primary-color);
}

.usage-card h4 {
    font-size: 1.125rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.usage-card p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin: 0;
}

.usage-card code {
    background: var(--bg-alt);
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    font-size: 0.875rem;
    color: var(--primary-dark);
    font-family: 'Courier New', monospace;
}

/* ===== Platforms Grid ===== */
.platforms-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.platform-card {
    background: white;
    padding: 2.5rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: all 0.3s ease;
}

.platform-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.platform-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.platform-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.platform-card p {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.platform-detail {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

.platform-link {
    color: var(--primary-color);
    font-weight: 600;
}

.platform-link:hover {
    color: var(--primary-dark);
}

/* ===== Pricing ===== */
.pricing-card {
    max-width: 600px;
    margin: 0 auto;
    background: white;
    padding: 3rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-xl);
    text-align: center;
    border: 3px solid var(--primary-color);
}

.pricing-card h3 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.price {
    margin-bottom: 2rem;
}

.price-amount {
    font-size: 4rem;
    font-weight: 700;
    color: var(--primary-color);
}

.price-period {
    font-size: 1.25rem;
    color: var(--text-secondary);
}

.pricing-features {
    list-style: none;
    text-align: left;
    margin-bottom: 2rem;
}

.pricing-features li {
    padding: 0.75rem 0;
    font-size: 1.125rem;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
}

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

.pricing-note {
    background: var(--bg-alt);
    padding: 1.5rem;
    border-radius: 0.5rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-top: 2rem;
}

.pricing-note strong {
    color: var(--text-primary);
}

.pricing-disclosure {
    margin-top: 1.5rem;
    font-size: 0.875rem;
    color: var(--text-light);
    font-style: italic;
    text-align: center;
}

/* ===== Download Section ===== */
.build-type-explanation {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
    max-width: 1000px;
    margin-left: auto;
    margin-right: auto;
}

.explanation-card {
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    border-left: 4px solid var(--primary-color);
}

.explanation-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.explanation-card p {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.explanation-card ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.explanation-card li {
    padding: 0.5rem 0;
    color: var(--text-secondary);
    padding-left: 1.5rem;
    position: relative;
}

.explanation-card li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: 600;
}

.download-platforms {
    margin-top: 3rem;
}

.platform-download-section {
    background: white;
    padding: 2.5rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    margin-bottom: 2rem;
    border: 2px solid var(--border-color);
}

.platform-header {
    text-align: center;
    margin-bottom: 2rem;
}

.platform-header h3 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.platform-header p {
    color: var(--text-secondary);
    font-size: 1rem;
}

.architecture-tabs {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.arch-tab {
    padding: 0.75rem 1.5rem;
    border: 2px solid var(--border-color);
    background: var(--bg-alt);
    color: var(--text-secondary);
    border-radius: 0.5rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.arch-tab:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.arch-tab.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.architecture-content {
    min-height: 200px;
}

.arch-options {
    display: none;
}

.arch-options.active {
    display: block;
}

.build-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.build-option {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: 0.75rem;
    text-align: center;
    border: 2px solid var(--border-color);
    transition: all 0.3s ease;
}

.build-option:hover {
    border-color: var(--primary-color);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.build-option h4 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.build-size {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.build-option .btn {
    display: block;
    width: 100%;
    margin-bottom: 0.75rem;
}

.build-option .btn:last-child {
    margin-bottom: 0;
}

.download-price-section {
    text-align: center;
    margin-top: 3rem;
    padding: 2rem;
    background: var(--bg-secondary);
    border-radius: 1rem;
}

.download-price {
    font-size: 1.25rem;
    color: var(--primary-color);
    font-weight: 600;
}

.download-price a {
    color: inherit;
    text-decoration: underline;
}

.download-price a:hover {
    opacity: 0.8;
}

.download-source {
    text-align: center;
    margin-top: 3rem;
}

.download-source p {
    font-size: 1.125rem;
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

/* Legacy download card styles (for backwards compatibility) */
.download-card {
    background: white;
    padding: 2.5rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    text-align: center;
    position: relative;
    transition: all 0.3s ease;
}

.download-card-available {
    border: 2px solid var(--primary-color);
}

.download-card-available:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.download-card-coming-soon {
    opacity: 0.7;
    border: 2px solid var(--border-color);
}

.coming-soon-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--text-light);
    color: white;
    padding: 0.25rem 1rem;
    border-radius: 1rem;
    font-size: 0.875rem;
    font-weight: 600;
}

.download-card h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.download-card p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.download-info {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-top: 1rem;
}

.download-buttons {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

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

.btn-disabled {
    background: var(--bg-alt);
    color: var(--text-light);
    cursor: not-allowed;
}

.btn-disabled:hover {
    transform: none;
    box-shadow: var(--shadow-sm);
}

/* ===== Use Cases Grid ===== */
.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.use-case {
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    text-align: center;
}

.use-case-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.use-case h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.use-case p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ===== Stats Grid ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 3rem;
    margin-top: 3rem;
}

.stat {
    text-align: center;
}

.stat-number {
    font-size: 4rem;
    font-weight: 700;
    background: var(--gradient-2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.stat-label {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
}

/* ===== FAQ Grid ===== */
.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.faq-item {
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-sm);
}

.faq-item h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.faq-item p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ===== CTA Section ===== */
.cta-section {
    background: var(--gradient);
    color: white;
    text-align: center;
}

.cta-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.cta-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2.5rem;
    opacity: 0.95;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* ===== Footer ===== */
.footer {
    background: var(--text-primary);
    color: white;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-section h4 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: white;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.footer-section h4 img {
    width: 24px;
    height: 24px;
    border-radius: 4px;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.7;
    margin-bottom: 0.5rem;
}

.footer-section a {
    display: block;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 0.5rem;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: white;
}

.footer-license {
    font-size: 0.9rem;
    margin-top: 1rem;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
}

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }

    .hero-logo img {
        width: 80px;
        height: 80px;
    }

    .hero-subtitle {
        font-size: 1.125rem;
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

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

    .nav-links {
        gap: 1rem;
        font-size: 0.9rem;
    }

    .steps-grid,
    .features-grid,
    .models-grid,
    .platforms-grid,
    .download-grid,
    .use-cases-grid,
    .faq-grid {
        grid-template-columns: 1fr;
    }

    .build-type-explanation {
        grid-template-columns: 1fr;
    }

    .build-options {
        grid-template-columns: 1fr;
    }

    .platform-download-section {
        padding: 1.5rem;
    }

    .architecture-tabs {
        flex-direction: column;
    }

    .arch-tab {
        width: 100%;
    }

    .model-selection-guide {
        grid-template-columns: 1fr;
    }

    .quantization-types {
        grid-template-columns: 1fr;
    }

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

    .model-sizes {
        flex-direction: column;
        align-items: center;
    }

    .spec-item {
        flex-direction: column;
        align-items: flex-start;
    }

    .spec-detail {
        margin-left: 0;
        margin-top: 0.25rem;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

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

    .hero-logo img {
        width: 64px;
        height: 64px;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .logo {
        font-size: 1.25rem;
    }

    .nav-links {
        display: none;
    }

    .stat-number {
        font-size: 3rem;
    }

    .scroll-to-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
    }
}

/* ===== Animations ===== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.feature-card,
.model-card,
.platform-card,
.use-case,
.faq-item {
    animation: fadeIn 0.6s ease-out;
}

/* ===== Scroll to Top Button ===== */
.scroll-to-top {
    position: fixed;
    bottom: 40px;
    right: 40px;
    width: 50px;
    height: 50px;
    background: var(--gradient-2);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(100px);
    transition: all 0.3s ease;
    z-index: 999;
}

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

.scroll-to-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.scroll-to-top:active {
    transform: translateY(-2px);
}

.scroll-to-top svg {
    width: 24px;
    height: 24px;
}