/*
 * Damo AI - Design System
 * 设计理念: 低调、专业、深耕技术
 *
 * Color Palette:
 * - Primary: #0a0a0f (Deep Space)
 * - Secondary: #1a1a2e (Midnight)
 * - Accent: #6366f1 (Indigo)
 * - Accent Alt: #8b5cf6 (Purple)
 * - Surface: #16161a (Card)
 * - Text: #e4e4e7 (Light)
 * - Muted: #71717a (Gray)
 */

/* ===== CSS Variables ===== */
:root {
    --color-bg: #0a0a0f;
    --color-surface: #16161a;
    --color-surface-hover: #1f1f26;
    --color-border: #27272a;
    --color-border-subtle: #1f1f23;
    --color-accent: #6366f1;
    --color-accent-hover: #818cf8;
    --color-accent-subtle: rgba(99, 102, 241, 0.1);
    --color-accent-glow: rgba(99, 102, 241, 0.15);
    --color-text: #e4e4e7;
    --color-text-muted: #a1a1aa;
    --color-text-subtle: #71717a;
    --color-success: #10b981;
    --color-warning: #f59e0b;

    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px var(--color-accent-glow);

    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    --transition-fast: 0.15s ease;
    --transition-base: 0.25s ease;
    --transition-slow: 0.4s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Subtle grid background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(rgba(99, 102, 241, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(99, 102, 241, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
    z-index: -1;
}

/* Gradient orbs for ambiance */
body::after {
    content: '';
    position: fixed;
    top: -50%;
    right: -30%;
    width: 80%;
    height: 80%;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.08) 0%, transparent 60%);
    pointer-events: none;
    z-index: -1;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-text);
    letter-spacing: -0.02em;
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.5rem); }

p {
    color: var(--color-text-muted);
    font-size: 1rem;
    line-height: 1.7;
}

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

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

/* ===== Layout ===== */
.wrapper {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

main {
    flex: 1;
    padding: 0;
}

#main-content {
    max-width: 100%;
    overflow-x: hidden;
}

/* ===== Navigation ===== */
nav {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border-subtle);
    padding: 0 2rem;
}

nav .nav-left {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

nav .nav-right {
    display: flex;
    align-items: center;
}

nav a {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 1rem;
    color: var(--color-text-muted);
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition-fast);
    position: relative;
}

nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: all var(--transition-fast);
    transform: translateX(-50%);
}

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

nav a:hover::after {
    width: 100%;
}

nav a i {
    font-size: 0.9rem;
    opacity: 0.7;
}

/* Language selector */
.language-select {
    background: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-text-muted);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.language-select:hover {
    border-color: var(--color-accent);
    color: var(--color-text);
}

.language-select:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px var(--color-accent-subtle);
}

.language-select option {
    background: var(--color-surface);
    color: var(--color-text);
}

/* ===== Hero Section ===== */
.hero-section {
    position: relative;
    padding: 8rem 2rem 6rem;
    text-align: center;
    background: linear-gradient(180deg, var(--color-bg) 0%, rgba(99, 102, 241, 0.05) 100%);
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--color-accent-glow) 0%, transparent 70%);
    transform: translate(-50%, -50%);
    pointer-events: none;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 700;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--color-text) 0%, var(--color-text-muted) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
    z-index: 1;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-muted);
    max-width: 600px;
    margin: 0 auto 2.5rem;
    position: relative;
    z-index: 1;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    position: relative;
    z-index: 1;
}

/* ===== Buttons ===== */
.primary-button, .secondary-button, .demo-button, .cta-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 1.75rem;
    font-size: 0.95rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    border: none;
    text-decoration: none;
}

.primary-button {
    background: var(--color-accent);
    color: white;
    box-shadow: 0 4px 14px rgba(99, 102, 241, 0.3);
}

.primary-button:hover {
    background: var(--color-accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
    color: white;
}

.secondary-button {
    background: transparent;
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

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

/* ===== Features Grid ===== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    padding: 4rem 2rem;
    max-width: 1400px;
    margin: 0 auto;
    background: transparent;
}

.feature-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-lg);
    padding: 2rem;
    text-align: center;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
    opacity: 0;
    transition: opacity var(--transition-base);
}

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

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

.feature-card i {
    font-size: 2rem;
    color: var(--color-accent);
    margin-bottom: 1rem;
    display: block;
}

.feature-card h3 {
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
    color: var(--color-text);
}

.feature-card p {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin: 0;
}

.feature-card a {
    color: inherit;
    text-decoration: none;
}

/* ===== Partners Showcase ===== */
.partners-showcase {
    padding: 6rem 2rem;
    background: linear-gradient(180deg, transparent 0%, rgba(99, 102, 241, 0.02) 50%, transparent 100%);
}

.partners-showcase h2 {
    text-align: center;
    margin-bottom: 0.75rem;
}

.partner-subtitle {
    text-align: center;
    color: var(--color-text-muted);
    margin-bottom: 3rem;
}

.partner-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    max-width: 1200px;
    margin: 0 auto;
}

.strategic-partner-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-lg);
    padding: 2rem;
    transition: all var(--transition-base);
}

.strategic-partner-card:hover {
    border-color: var(--color-border);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.partner-logo {
    height: 48px;
    width: auto;
    object-fit: contain;
    margin-bottom: 1.5rem;
    filter: brightness(0) invert(1);
    opacity: 0.8;
    transition: all var(--transition-base);
}

.strategic-partner-card:hover .partner-logo {
    opacity: 1;
    filter: brightness(0) invert(1);
}

.strategic-partner-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.strategic-partner-card p {
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

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

.partner-features li {
    font-size: 0.85rem;
    color: var(--color-text-subtle);
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--color-border-subtle);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.partner-features li::before {
    content: '→';
    color: var(--color-accent);
    font-size: 0.75rem;
}

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

/* ===== Value Proposition ===== */
.partner-value-proposition {
    margin: 4rem auto;
    padding: 3rem;
    max-width: 1200px;
    background: var(--color-surface);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-xl);
}

.partner-value-proposition h3 {
    text-align: center;
    margin-bottom: 2.5rem;
}

.value-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
}

.value-item {
    text-align: center;
    padding: 1.5rem;
    background: rgba(99, 102, 241, 0.05);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.value-item:hover {
    background: rgba(99, 102, 241, 0.1);
    transform: translateY(-2px);
}

.value-item i {
    font-size: 1.75rem;
    color: var(--color-accent);
    margin-bottom: 1rem;
}

.value-item h4 {
    font-size: 1rem;
    margin-bottom: 0.5rem;
}

.value-item p {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin: 0;
}

/* ===== CTA Section ===== */
.cta-section {
    padding: 5rem 2rem;
    text-align: center;
    background: linear-gradient(135deg, var(--color-surface) 0%, rgba(99, 102, 241, 0.05) 100%);
    border-top: 1px solid var(--color-border-subtle);
    border-bottom: 1px solid var(--color-border-subtle);
    margin: 2rem 0;
}

.cta-section.light-theme {
    background: linear-gradient(135deg, var(--color-surface) 0%, rgba(99, 102, 241, 0.08) 100%);
}

.cta-section h2 {
    margin-bottom: 1rem;
}

.cta-section p {
    max-width: 600px;
    margin: 0 auto 2rem;
}

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

/* ===== Footer ===== */
footer {
    background: var(--color-surface);
    border-top: 1px solid var(--color-border-subtle);
    padding: 3rem 2rem;
}

.footer-content {
    text-align: center;
    max-width: 1200px;
    margin: 0 auto;
}

.footer-content h1.footer-text {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--color-text) 0%, var(--color-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-content h2.footer-text {
    font-size: 1rem;
    font-weight: 400;
    color: var(--color-text-muted);
    margin-bottom: 1rem;
}

.footer-content h3.footer-text {
    font-size: 0.85rem;
    color: var(--color-text-subtle);
    font-weight: 400;
}

/* ===== Cards (General) ===== */
.contact-card, .service-card, .solution-card, .product-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-lg);
    padding: 2rem;
    transition: all var(--transition-base);
}

.contact-card:hover, .service-card:hover, .solution-card:hover, .product-card:hover {
    border-color: var(--color-border);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.contact-card-header {
    margin-bottom: 1.5rem;
}

.contact-card-header i {
    font-size: 2rem;
    color: var(--color-accent);
    margin-bottom: 1rem;
    display: block;
}

.contact-card-header h3 {
    font-size: 1.25rem;
    margin: 0;
}

.contact-card p {
    margin-bottom: 1.5rem;
}

.contact-link {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background: var(--color-accent-subtle);
    color: var(--color-accent);
    border-radius: var(--radius-sm);
    font-weight: 500;
    transition: all var(--transition-fast);
}

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

/* ===== Contact Section ===== */
.contact-section {
    padding: 5rem 2rem;
    background: linear-gradient(180deg, transparent 0%, rgba(99, 102, 241, 0.03) 100%);
}

.contact-section h2 {
    text-align: center;
    margin-bottom: 1rem;
}

.section-subtitle {
    text-align: center;
    color: var(--color-text-muted);
    max-width: 600px;
    margin: 0 auto 3rem;
}

.contact-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    max-width: 1000px;
    margin: 0 auto;
}

/* ===== Benefits & Values ===== */
.benefits-values-section {
    padding: 5rem 2rem;
}

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

.benefits-box h2, .values-box h2 {
    text-align: center;
    margin-bottom: 3rem;
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 4rem;
}

.benefit-item {
    background: var(--color-surface);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-lg);
    padding: 2rem;
    text-align: center;
    transition: all var(--transition-base);
}

.benefit-item:hover {
    border-color: var(--color-border);
    transform: translateY(-4px);
}

.benefit-item i {
    font-size: 2rem;
    color: var(--color-accent);
    margin-bottom: 1rem;
}

.benefit-item h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

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

.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.value-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    background: var(--color-accent-subtle);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 1rem;
}

.value-icon i {
    font-size: 1.25rem;
    color: var(--color-accent);
}

.value-content h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.value-content p {
    font-size: 0.9rem;
    margin: 0;
}

/* ===== Approach Grid ===== */
.approach-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.approach-item {
    background: var(--color-surface);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    transition: all var(--transition-base);
}

.approach-item:hover {
    border-color: var(--color-border);
    transform: translateY(-4px);
}

.approach-item h3 {
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
    color: var(--color-text);
}

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

/* ===== Articles Page ===== */
.articles-hero, .articles-feed, .articles-podcast {
    max-width: 800px;
    margin: 3rem auto;
    padding: 0 2rem;
}

.articles-hero h1 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.articles-hero p {
    color: var(--color-text-muted);
}

.articles-feed h2, .articles-podcast h2 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
}

.substack-embed-container {
    background: var(--color-surface);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-lg);
    padding: 2rem;
}

.podcast-embed-container {
    max-width: 100%;
    margin: 0 auto;
}

.podcast-embed-container iframe {
    border-radius: var(--radius-md);
}

/* ===== Solutions Page ===== */
.solutions-hero, .services-hero {
    padding: 6rem 2rem 4rem;
    text-align: center;
    background: linear-gradient(180deg, var(--color-bg) 0%, rgba(99, 102, 241, 0.05) 100%);
}

.solutions-hero h1, .services-hero h1 {
    margin-bottom: 1rem;
}

.solutions-hero p, .services-hero p {
    color: var(--color-text-muted);
    max-width: 600px;
    margin: 0 auto;
}

.solutions-grid, .services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
    padding: 3rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.solution-header, .service-icon {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.solution-header i {
    font-size: 1.5rem;
    color: var(--color-accent);
}

.service-icon {
    width: 56px;
    height: 56px;
    background: var(--color-accent-subtle);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.service-icon i {
    font-size: 1.5rem;
    color: var(--color-accent);
}

.solution-features, .service-features {
    list-style: none;
    padding: 0;
    margin: 1rem 0;
}

.solution-features li, .service-features li {
    padding: 0.5rem 0;
    color: var(--color-text-muted);
    font-size: 0.9rem;
    border-bottom: 1px solid var(--color-border-subtle);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.solution-features li::before, .service-features li::before {
    content: '✓';
    color: var(--color-success);
    font-size: 0.8rem;
}

.solution-features li:last-child, .service-features li:last-child {
    border-bottom: none;
}

/* ===== Product Showcase ===== */
.product-showcase {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
    padding: 3rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.product-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem;
    border-bottom: 1px solid var(--color-border-subtle);
}

.product-header i {
    font-size: 1.5rem;
    color: var(--color-accent);
}

.product-header h2 {
    font-size: 1.25rem;
    margin: 0;
}

.product-content {
    padding: 1.5rem;
}

.product-description {
    margin-bottom: 1rem;
}

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

.product-features li {
    padding: 0.5rem 0;
    color: var(--color-text-muted);
    font-size: 0.9rem;
    border-bottom: 1px solid var(--color-border-subtle);
}

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

.product-footer {
    padding: 1.5rem;
    border-top: 1px solid var(--color-border-subtle);
    background: rgba(99, 102, 241, 0.03);
}

.demo-button {
    width: 100%;
    background: var(--color-accent);
    color: white;
}

.demo-button:hover {
    background: var(--color-accent-hover);
}

/* ===== More Products ===== */
.more-products {
    background: var(--color-surface);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-xl);
    padding: 4rem 2rem;
    text-align: center;
    max-width: 1200px;
    margin: 2rem auto;
    position: relative;
    overflow: hidden;
}

.more-products::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-accent), var(--color-accent-hover));
}

.more-products h2 {
    margin-bottom: 1rem;
}

.more-products p {
    max-width: 500px;
    margin: 0 auto;
}

.coming-soon-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: var(--color-accent-subtle);
    color: var(--color-accent);
    border-radius: 2rem;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 1.5rem;
}

/* ===== Methodology / Process ===== */
.methodology-section, .implementation-process {
    padding: 5rem 2rem;
    background: rgba(99, 102, 241, 0.02);
}

.methodology-section h2, .implementation-process h2 {
    text-align: center;
    margin-bottom: 3rem;
}

.methodology-steps, .process-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.step, .process-step {
    text-align: center;
}

.step-number {
    width: 48px;
    height: 48px;
    background: var(--color-accent);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    margin: 0 auto 1rem;
}

.step h3, .process-step h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.step p, .process-step p {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

/* ===== Services Intro ===== */
.services-intro {
    max-width: 800px;
    margin: 3rem auto;
    padding: 2rem;
    text-align: center;
    background: var(--color-surface);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-lg);
}

.services-intro h2 {
    margin-bottom: 1rem;
}

/* ===== Pricing ===== */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    padding: 3rem 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.pricing-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-lg);
    padding: 2rem;
    text-align: center;
    transition: all var(--transition-base);
}

.pricing-card.featured {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-glow);
}

.pricing-card:hover {
    transform: translateY(-4px);
}

.pricing-card .price {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-text);
    margin: 1rem 0;
}

.pricing-card ul {
    list-style: none;
    padding: 0;
    margin: 1.5rem 0;
    text-align: left;
}

.pricing-card li {
    padding: 0.5rem 0;
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

/* ===== Back Link ===== */
.link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-text-muted);
    font-size: 0.95rem;
    margin: 2rem 0;
    transition: color var(--transition-fast);
}

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

/* ===== Custom Solutions ===== */
.custom-solutions, .solutions-cta {
    padding: 4rem 2rem;
    text-align: center;
    background: var(--color-surface);
    border-top: 1px solid var(--color-border-subtle);
}

.custom-solutions h2, .solutions-cta h2 {
    margin-bottom: 1rem;
}

.custom-solutions p, .solutions-cta p {
    max-width: 600px;
    margin: 0 auto 2rem;
}

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

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

@media (max-width: 768px) {
    nav {
        padding: 0.5rem 1rem;
        flex-direction: column;
    }

    nav .nav-left {
        flex-wrap: wrap;
        justify-content: center;
        gap: 0;
    }

    nav a {
        padding: 0.75rem;
        font-size: 0.85rem;
    }

    nav .nav-right {
        margin-top: 0.5rem;
    }

    .hero-section {
        padding: 5rem 1.5rem 4rem;
    }

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

    .primary-button, .secondary-button {
        width: 100%;
        max-width: 280px;
    }

    .features-grid {
        grid-template-columns: 1fr 1fr;
        padding: 3rem 1.5rem;
    }

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

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

    .partner-value-proposition {
        margin: 2rem 1rem;
        padding: 2rem 1.5rem;
    }

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

    .contact-cards {
        grid-template-columns: 1fr;
    }

    .solutions-grid, .services-grid, .product-showcase {
        grid-template-columns: 1fr;
    }

    .methodology-steps, .process-steps {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 480px) {
    .features-grid {
        grid-template-columns: 1fr;
    }

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

    .methodology-steps, .process-steps {
        grid-template-columns: 1fr;
    }

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

/* ===== Special Pages ===== */
body.pitch-deck-page,
body.ai-innovation-hub-page {
    background-color: #ffffff;
    color: #1a1a2e;
}

body.pitch-deck-page::before,
body.pitch-deck-page::after,
body.ai-innovation-hub-page::before,
body.ai-innovation-hub-page::after {
    display: none;
}

#pitch-deck-content,
.ai-innovation-hub-container {
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

#pitch-deck-root {
    background: #ffffff;
    color: #1a1a2e;
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

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

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.fade-in {
    animation: fadeIn 0.6s ease forwards;
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-subtle);
}

/* ===== Selection ===== */
::selection {
    background: var(--color-accent);
    color: white;
}

/* ===== Focus States ===== */
*:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* ===== Print Styles ===== */
@media print {
    body {
        background: white;
        color: black;
    }

    body::before,
    body::after {
        display: none;
    }

    nav, footer {
        display: none;
    }
}