/* ========================================
   NexusTech - 高端科技企业主页样式表
   ======================================== */

/* CSS Variables */
:root {
    --bg-primary: #0a0e17;
    --bg-secondary: #111827;
    --bg-card: rgba(17, 24, 39, 0.7);
    --accent-cyan: #00d4ff;
    --accent-purple: #8b5cf6;
    --accent-emerald: #10b981;
    --accent-orange: #f59e0b;
    --text-primary: #f9fafb;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    --border-glow: rgba(0, 212, 255, 0.2);
    --border-subtle: rgba(255, 255, 255, 0.1);
    --shadow-glow: 0 0 30px rgba(0, 212, 255, 0.15);
    --shadow-card: 0 4px 30px rgba(0, 0, 0, 0.3);
    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;
    --transition-slow: 500ms ease;
    --font-heading: 'Space Grotesk', sans-serif;
    --font-body: 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
}

.gradient-text {
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ========================================
   Navigation
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 20px 0;
    transition: all var(--transition-normal);
}

.navbar.scrolled {
    background: rgba(10, 14, 23, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-subtle);
    padding: 12px 0;
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
}

.logo-icon {
    width: 36px;
    height: 36px;
}

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

.nav-links a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    padding: 4px 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple));
    transition: width var(--transition-fast);
}

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

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

.nav-cta {
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
    color: var(--bg-primary) !important;
    padding: 10px 20px !important;
    border-radius: 8px;
    font-weight: 600;
}

.nav-cta::after {
    display: none !important;
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(0, 212, 255, 0.4);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

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

/* ========================================
   Hero Section
   ======================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: radial-gradient(ellipse at center, rgba(0, 212, 255, 0.08) 0%, transparent 50%),
                radial-gradient(ellipse at 80% 20%, rgba(139, 92, 246, 0.08) 0%, transparent 40%),
                var(--bg-primary);
}

#particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, transparent 0%, var(--bg-primary) 100%);
    z-index: 2;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 3;
    text-align: center;
    max-width: 900px;
    padding: 120px 24px 80px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid var(--border-glow);
    padding: 8px 16px;
    border-radius: 50px;
    font-size: 0.875rem;
    color: var(--accent-cyan);
    margin-bottom: 24px;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--accent-cyan);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.2); }
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2vw, 1.35rem);
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto 40px;
    line-height: 1.8;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 48px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    transition: all var(--transition-fast);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
    color: var(--bg-primary);
    box-shadow: 0 4px 20px rgba(0, 212, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(0, 212, 255, 0.5);
}

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

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--accent-cyan);
}

.hero-tech-tags {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

.tech-tag {
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-subtle);
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-family: var(--font-mono);
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    color: var(--text-muted);
    font-size: 0.8rem;
    animation: float 3s ease-in-out infinite;
}

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

.scroll-mouse {
    width: 24px;
    height: 36px;
    border: 2px solid var(--text-muted);
    border-radius: 12px;
    position: relative;
}

.scroll-wheel {
    width: 4px;
    height: 8px;
    background: var(--accent-cyan);
    border-radius: 2px;
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    animation: scrollWheel 2s ease-in-out infinite;
}

@keyframes scrollWheel {
    0% { opacity: 1; transform: translateX(-50%) translateY(0); }
    100% { opacity: 0; transform: translateX(-50%) translateY(12px); }
}

/* ========================================
   Section Styles
   ======================================== */
section {
    padding: 120px 0;
    position: relative;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 64px;
}

.section-tag {
    display: inline-block;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.1), rgba(139, 92, 246, 0.1));
    border: 1px solid var(--border-glow);
    color: var(--accent-cyan);
    padding: 6px 16px;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 16px;
    font-family: var(--font-mono);
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: 16px;
}

.section-desc {
    color: var(--text-secondary);
    font-size: 1.1rem;
    line-height: 1.7;
}

/* ========================================
   Stats Section
   ======================================== */
.stats {
    background: var(--bg-secondary);
    padding: 80px 0;
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}

.stat-item {
    text-align: center;
    padding: 24px;
    position: relative;
}

.stat-item:not(:last-child)::after {
    content: '';
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 1px;
    height: 60%;
    background: linear-gradient(180deg, transparent, var(--border-glow), transparent);
}

.stat-icon {
    color: var(--accent-cyan);
    margin-bottom: 16px;
}

.stat-number {
    font-family: var(--font-heading);
    font-size: 3.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 8px;
}

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

/* ========================================
   Services Section
   ======================================== */
.services {
    background: var(--bg-primary);
}

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

.web-grid {
    display: contents;
}

.service-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    padding: 40px 32px;
    position: relative;
    overflow: hidden;
    transition: all var(--transition-normal);
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple));
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.service-card:hover {
    transform: translateY(-8px);
    border-color: var(--border-glow);
    box-shadow: var(--shadow-glow);
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-icon {
    width: 72px;
    height: 72px;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.1), rgba(139, 92, 246, 0.1));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    color: var(--accent-cyan);
    transition: all var(--transition-normal);
    font-size: 28px;
}

.service-icon i {
    line-height: 1;
}

.service-card:hover .service-icon {
    transform: scale(1.1);
}

.service-card:hover .service-icon.ai-icon {
    background: linear-gradient(135deg, #60a5fa, #3b82f6);
    color: #fff;
}

.service-card:hover .service-icon.aws-icon {
    background: linear-gradient(135deg, #f97316, #f59e0b);
}

.service-card:hover .service-icon.platform-icon {
    background: linear-gradient(135deg, #34d399, #10b981);
    color: #fff;
}

.ai-icon {
    color: #60a5fa;
}

.aws-icon {
    color: #f97316;
}

.platform-icon {
    color: #34d399;
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 16px;
}

.service-card > p {
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.7;
}

.service-features {
    margin-bottom: 24px;
}

.service-features li {
    color: var(--text-secondary);
    padding: 8px 0;
    padding-left: 20px;
    position: relative;
    font-size: 0.95rem;
}

.service-features li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 6px;
    height: 6px;
    background: var(--accent-emerald);
    border-radius: 50%;
}

/* AWS Icon */
.service-icon.aws-icon {
    background: linear-gradient(135deg, rgba(249, 115, 22, 0.1), rgba(245, 158, 11, 0.1));
}

/* Platform Icon */
.service-icon.platform-icon {
    background: linear-gradient(135deg, rgba(52, 211, 153, 0.1), rgba(16, 185, 129, 0.1));
}

.web-card {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 32px;
    padding: 32px 40px;
}

.web-card-content {
    flex: 1;
}

.web-card-content h3 {
    font-size: 1.3rem;
    margin-bottom: 8px;
}

.web-card-content p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin: 0;
}

.service-icon.web-icon {
    background: linear-gradient(135deg, rgba(96, 165, 250, 0.1), rgba(52, 211, 153, 0.1));
    flex-shrink: 0;
}

.service-card:hover .service-icon.web-icon {
    background: linear-gradient(135deg, #60a5fa, #34d399);
}

.web-tech-icons {
    display: flex;
    gap: 16px;
}

.tech-icon {
    font-size: 28px;
    color: var(--text-muted);
    transition: all var(--transition-fast);
}

.web-card:hover .tech-icon {
    color: var(--text-secondary);
}

@media (max-width: 768px) {
    .web-card {
        flex-direction: column;
        text-align: center;
    }
    
    .web-tech-icons {
        justify-content: center;
    }
}

.service-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--accent-cyan);
    font-weight: 500;
    transition: all var(--transition-fast);
}

.service-link:hover {
    gap: 10px;
}

/* ========================================
   Platforms Section
   ======================================== */
.platforms {
    background: var(--bg-secondary);
}

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

.platform-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    padding: 40px;
    display: flex;
    align-items: center;
    gap: 24px;
    transition: all var(--transition-normal);
}

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

.platform-logo {
    width: 80px;
    height: 80px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.platform-logo svg {
    width: 48px;
    height: 48px;
}

.platform-logo.aws {
    background: linear-gradient(135deg, #ff9900, #ff6600);
    color: white;
}

.platform-logo.salesforce {
    background: linear-gradient(135deg, #00a1e0, #002d72);
    color: white;
}

.platform-logo.servicenow {
    background: linear-gradient(135deg, #81b5a1, #2e8b57);
    color: white;
}

.platform-info h4 {
    font-size: 1.25rem;
    margin-bottom: 4px;
}

.platform-info p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 8px;
}

.platform-badge {
    display: inline-block;
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: var(--accent-emerald);
    padding: 4px 12px;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 500;
}

/* ========================================
   Solutions Section
   ======================================== */
.solutions {
    background: var(--bg-primary);
    position: relative;
}

.solutions::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.1) 0%, transparent 70%);
    pointer-events: none;
}

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

.solution-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    padding: 40px 32px;
    position: relative;
    overflow: hidden;
    transition: all var(--transition-normal);
}

.solution-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.1), transparent);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

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

.solution-card:hover::after {
    opacity: 1;
}

.solution-number {
    font-family: var(--font-mono);
    font-size: 4rem;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.05);
    position: absolute;
    top: 20px;
    right: 20px;
    line-height: 1;
}

.solution-content {
    position: relative;
    z-index: 1;
}

.solution-content h3 {
    font-size: 1.5rem;
    margin-bottom: 16px;
}

.solution-content > p {
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.7;
}

.solution-features {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 24px;
}

.solution-features span {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-subtle);
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.solution-projects {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding-top: 16px;
    border-top: 1px dashed var(--border-subtle);
}

.project-tag {
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.08), rgba(139, 92, 246, 0.08));
    border: 1px solid var(--border-glow);
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 0.75rem;
    color: var(--text-primary);
    font-family: var(--font-mono);
}

.solution-link {
    color: var(--accent-cyan);
    font-weight: 500;
    transition: all var(--transition-fast);
}

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

.solution-ai .solution-number {
    color: rgba(0, 212, 255, 0.1);
}

.solution-cloud .solution-number {
    color: rgba(139, 92, 246, 0.1);
}

.solution-enterprise .solution-number {
    color: rgba(16, 185, 129, 0.1);
}

/* ========================================
   Why Us Section
   ======================================== */
.why-us {
    background: var(--bg-secondary);
}

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

.why-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    padding: 32px;
    transition: all var(--transition-normal);
}

.why-card:hover {
    border-color: var(--border-glow);
    transform: translateY(-4px);
}

.why-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.1), rgba(139, 92, 246, 0.1));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: var(--accent-cyan);
    transition: all var(--transition-normal);
}

.why-card:hover .why-icon {
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
    color: var(--bg-primary);
}

.why-card h4 {
    font-size: 1.2rem;
    margin-bottom: 12px;
}

.why-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ========================================
   CTA Section
   ======================================== */
.cta {
    position: relative;
    padding: 120px 0;
    overflow: hidden;
}

.cta-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.15), rgba(139, 92, 246, 0.15));
    z-index: 1;
}

.cta-bg::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, transparent 30%, var(--bg-primary) 70%);
}

.cta-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.cta-content h2 {
    font-size: clamp(2rem, 4vw, 2.5rem);
    margin-bottom: 16px;
}

.cta-content p {
    color: var(--text-secondary);
    font-size: 1.2rem;
    margin-bottom: 40px;
}

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

.btn-cta {
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
    color: var(--bg-primary);
    padding: 16px 32px;
    font-size: 1.1rem;
    box-shadow: 0 4px 30px rgba(0, 212, 255, 0.4);
}

.btn-cta:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 40px rgba(0, 212, 255, 0.5);
}

.btn-outline-light {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--text-primary);
    padding: 16px 32px;
    font-size: 1.1rem;
}

.btn-outline-light:hover {
    background: rgba(255, 255, 255, 0.1);
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background: var(--bg-primary);
    border-top: 1px solid var(--border-subtle);
    padding: 80px 0 32px;
}

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

.footer-brand .logo {
    margin-bottom: 16px;
}

.footer-brand p {
    color: var(--text-secondary);
    margin-bottom: 24px;
    max-width: 280px;
    line-height: 1.7;
}

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

.social-links a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.social-links a:hover {
    background: var(--accent-cyan);
    border-color: var(--accent-cyan);
    color: var(--bg-primary);
}

.footer-links h5 {
    font-size: 1rem;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: var(--text-secondary);
    font-size: 0.95rem;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--accent-cyan);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 32px;
    border-top: 1px solid var(--border-subtle);
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer-legal {
    display: flex;
    gap: 24px;
}

.footer-legal a:hover {
    color: var(--text-secondary);
}

/* ========================================
   Animations
   ======================================== */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger animation for children */
.services-grid .animate-on-scroll:nth-child(1) { transition-delay: 0ms; }
.services-grid .animate-on-scroll:nth-child(2) { transition-delay: 80ms; }
.services-grid .animate-on-scroll:nth-child(3) { transition-delay: 160ms; }
.services-grid .animate-on-scroll:nth-child(4) { transition-delay: 240ms; }

.platforms-grid .animate-on-scroll:nth-child(1) { transition-delay: 0ms; }
.platforms-grid .animate-on-scroll:nth-child(2) { transition-delay: 120ms; }
.platforms-grid .animate-on-scroll:nth-child(3) { transition-delay: 240ms; }

.solutions-grid .animate-on-scroll:nth-child(1) { transition-delay: 0ms; }
.solutions-grid .animate-on-scroll:nth-child(2) { transition-delay: 120ms; }
.solutions-grid .animate-on-scroll:nth-child(3) { transition-delay: 240ms; }

.stats-grid .animate-on-scroll:nth-child(1) { transition-delay: 0ms; }
.stats-grid .animate-on-scroll:nth-child(2) { transition-delay: 100ms; }
.stats-grid .animate-on-scroll:nth-child(3) { transition-delay: 200ms; }
.stats-grid .animate-on-scroll:nth-child(4) { transition-delay: 300ms; }

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 1024px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stat-item:nth-child(2)::after {
        display: none;
    }
    
    .services-grid,
    .solutions-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: flex;
    }
    
    .nav-links {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(10, 14, 23, 0.98);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 32px;
        transform: translateX(100%);
        transition: transform var(--transition-normal);
    }
    
    .nav-links.active {
        transform: translateX(0);
    }
    
    .nav-links a {
        font-size: 1.5rem;
    }
    
    .mobile-menu-btn.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .mobile-menu-btn.active span:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-menu-btn.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }
    
    .hero-content {
        padding-top: 140px;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }
    
    .stats-grid,
    .solutions-grid {
        grid-template-columns: 1fr;
    }
    
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stat-item::after {
        display: none;
    }
    
    section {
        padding: 80px 0;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-brand {
        display: flex;
        flex-direction: column;
        align-items: center;
    }
    
    .social-links {
        justify-content: center;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 16px;
    }
}

/* ========================================
   Utility Classes
   ======================================== */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

/* Reduce motion for accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}