/* ==========================================================================
   Hala AI (哈拉AI工作室) - Commercial Design System (商业纯色风格)
   Zero Gradients · Solid Corporate Blue & Slate · Crisp Enterprise UI
   ========================================================================== */

:root {
    /* Brand & Accent Colors (Solid, No Gradients) */
    --primary: #1d4ed8;
    --primary-hover: #1e40af;
    --primary-active: #172554;
    --primary-subtle: #eff6ff;
    --primary-border: #bfdbfe;
    
    /* Executive Dark Navy / Slate (Commercial Authority) */
    --dark-950: #070c18;
    --dark-900: #0b132b;
    --dark-850: #101a38;
    --dark-800: #152246;
    --dark-border: #1e2e58;
    --dark-text-muted: #94a3b8;

    /* Light Theme Neutrals */
    --surface: #ffffff;
    --bg-page: #ffffff;
    --bg-muted: #f8fafc;
    --bg-card: #ffffff;
    --border-color: #e2e8f0;
    --border-subtle: #f1f5f9;
    --border-hover: #cbd5e1;

    /* Typography Colors */
    --text-primary: #0f172a;
    --text-secondary: #334155;
    --text-muted: #64748b;
    --text-light: #94a3b8;

    /* Semantic Status */
    --success: #059669;
    --success-bg: #ecfdf5;
    --success-border: #a7f3d0;

    /* Geometry & Transitions */
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 10px;
    --radius-xl: 14px;
    --transition: 0.2s cubic-bezier(0.16, 1, 0.3, 1);

    /* Shadows (Clean, subtle elevation, no colored hazy glows) */
    --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.04);
    --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.08), 0 1px 2px rgba(15, 23, 42, 0.04);
    --shadow-md: 0 4px 10px -1px rgba(15, 23, 42, 0.08), 0 2px 4px -2px rgba(15, 23, 42, 0.04);
    --shadow-lg: 0 12px 24px -4px rgba(15, 23, 42, 0.08), 0 4px 6px -2px rgba(15, 23, 42, 0.03);
}

/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--text-secondary);
    background-color: var(--bg-page);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: #ffffff;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-xs);
    transition: background-color var(--transition), border-color var(--transition);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.nav-logo h2 {
    color: var(--text-primary);
    font-size: 1.375rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-logo h2::before {
    content: '';
    display: inline-block;
    width: 10px;
    height: 10px;
    background-color: var(--primary);
    border-radius: 2px;
}

.nav-logo span {
    color: var(--text-muted);
    font-size: 0.8125rem;
    font-weight: 500;
    padding-left: 10px;
    border-left: 1px solid var(--border-color);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2.25rem;
    align-items: center;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.9375rem;
    transition: color var(--transition);
    position: relative;
    padding: 6px 0;
}

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

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

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--primary);
    border-radius: 1px;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
    padding: 6px;
}

.hamburger span {
    width: 22px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition);
}

/* Main content wrapper */
main {
    margin-top: 72px;
}

/* ==========================================================================
   Hero Section (Solid Deep Navy, Business Authority)
   ========================================================================== */
.hero {
    background-color: var(--dark-900);
    color: #ffffff;
    padding: 88px 0 96px;
    position: relative;
    border-bottom: 1px solid var(--dark-border);
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: 4rem;
    align-items: center;
}

.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background-color: var(--dark-850);
    border: 1px solid var(--dark-border);
    color: #93c5fd;
    font-size: 0.8125rem;
    font-weight: 600;
    padding: 6px 14px;
    border-radius: var(--radius-md);
    margin-bottom: 1.5rem;
    letter-spacing: 0.02em;
}

.hero-tag-dot {
    width: 6px;
    height: 6px;
    background-color: #3b82f6;
    border-radius: 50%;
}

.hero-title {
    font-size: 3.25rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    line-height: 1.18;
    letter-spacing: -0.03em;
    color: #ffffff;
}

.hero-subtitle {
    font-size: 1.125rem;
    margin-bottom: 2.25rem;
    color: var(--dark-text-muted);
    line-height: 1.7;
    max-width: 540px;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    align-items: center;
}

/* Buttons (Solid Corporate Style) */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 11px 24px;
    border-radius: var(--radius-md);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9375rem;
    transition: all var(--transition);
    border: 1px solid transparent;
    cursor: pointer;
}

.btn-primary {
    background-color: var(--primary);
    color: #ffffff;
    border-color: var(--primary);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: var(--dark-850);
    color: #f1f5f9;
    border-color: var(--dark-border);
}

.btn-secondary:hover {
    background-color: var(--dark-800);
    border-color: #3b82f6;
    color: #ffffff;
}

.btn-outline-dark {
    background-color: transparent;
    color: var(--text-primary);
    border-color: var(--border-color);
}

.btn-outline-dark:hover {
    background-color: var(--bg-muted);
    border-color: var(--border-hover);
}

/* Hero Console / Architecture Preview (Professional Business Replacement) */
.hero-console {
    background-color: var(--dark-850);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.console-header {
    background-color: var(--dark-950);
    padding: 12px 18px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--dark-border);
}

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

.console-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: #334155;
}

.console-dot.red { background-color: #ef4444; }
.console-dot.yellow { background-color: #f59e0b; }
.console-dot.green { background-color: #10b981; }

.console-status {
    font-size: 0.75rem;
    color: #10b981;
    font-weight: 600;
    font-family: monospace;
    display: flex;
    align-items: center;
    gap: 6px;
}

.console-status::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: #10b981;
}

.console-body {
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.console-metric-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
}

.console-metric {
    background-color: var(--dark-900);
    border: 1px solid var(--dark-border);
    padding: 12px;
    border-radius: var(--radius-md);
    text-align: center;
}

.console-metric-val {
    font-size: 1.25rem;
    font-weight: 700;
    color: #ffffff;
    font-family: monospace;
}

.console-metric-label {
    font-size: 0.6875rem;
    color: var(--dark-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-top: 2px;
}

.console-pipeline {
    background-color: var(--dark-900);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius-md);
    padding: 14px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.pipeline-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.8125rem;
    color: #cbd5e1;
    padding: 6px 8px;
    background-color: var(--dark-850);
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--primary);
}

.pipeline-name {
    font-weight: 500;
}

.pipeline-tag {
    font-size: 0.6875rem;
    padding: 2px 8px;
    background-color: var(--dark-950);
    border: 1px solid var(--dark-border);
    color: #93c5fd;
    border-radius: 4px;
    font-family: monospace;
}

/* ==========================================================================
   Sections Structure & Headers
   ========================================================================== */
.section-header {
    text-align: center;
    margin-bottom: 3.5rem;
}

.section-badge {
    display: inline-block;
    padding: 4px 12px;
    background-color: var(--primary-subtle);
    border: 1px solid var(--primary-border);
    color: var(--primary);
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: var(--radius-sm);
    margin-bottom: 0.875rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.section-header h2 {
    font-size: 2.25rem;
    font-weight: 800;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.section-header p {
    font-size: 1.0625rem;
    color: var(--text-muted);
    max-width: 620px;
    margin: 0 auto;
    line-height: 1.6;
}

/* ==========================================================================
   Products Section (Clean Solid Commercial Architecture)
   ========================================================================== */
.products {
    padding: 96px 0;
    background-color: var(--bg-page);
    position: relative;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
    gap: 1.75rem;
}

.product-card {
    background-color: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    border-top: 3px solid var(--primary);
    padding: 1.75rem;
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: all var(--transition);
    box-shadow: var(--shadow-xs);
}

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

.product-header {
    margin-bottom: 1.25rem;
}

.product-header h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
    letter-spacing: -0.01em;
}

.product-tagline {
    font-size: 0.8125rem;
    font-family: monospace;
    color: var(--primary);
    font-weight: 600;
    margin-bottom: 0.875rem;
}

.product-body p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.6;
    margin-bottom: 1.25rem;
    min-height: 4.8em;
}

.product-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 1.5rem;
}

.product-tags .tag {
    background-color: var(--bg-muted);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    font-size: 0.75rem;
    font-weight: 500;
    padding: 3px 8px;
    border-radius: var(--radius-sm);
}

.product-footer {
    padding-top: 1rem;
    border-top: 1px solid var(--border-subtle);
}

.product-link-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    width: 100%;
    text-align: center;
    background-color: var(--text-primary);
    color: #ffffff;
    font-weight: 600;
    font-size: 0.875rem;
    padding: 10px 16px;
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: background-color var(--transition);
}

.product-link-btn:hover {
    background-color: var(--primary);
    color: #ffffff;
}

/* ==========================================================================
   Features / Core Capabilities (Solid Corporate Layout)
   ========================================================================== */
.features {
    padding: 96px 0;
    background-color: var(--bg-muted);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.75rem;
}

.feature-card {
    background-color: var(--surface);
    padding: 2rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    border-top: 3px solid var(--primary);
    box-shadow: var(--shadow-xs);
    transition: all var(--transition);
}

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

.feature-card h3 {
    font-size: 1.1875rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.6;
}

/* ==========================================================================
   About Section (Enterprise Trust & Metrics)
   ========================================================================== */
.about {
    padding: 96px 0;
    background-color: var(--bg-page);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
}

.about-text h2 {
    font-size: 2.25rem;
    font-weight: 800;
    margin-bottom: 1.25rem;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    text-align: center;
}

.about-text > p {
    font-size: 1.0625rem;
    color: var(--text-secondary);
    margin: 0 auto 3rem;
    line-height: 1.7;
    max-width: 760px;
    text-align: center;
}

.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.5rem;
}

.stat-item {
    background-color: var(--bg-muted);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2rem;
    text-align: left;
    border-left: 4px solid var(--primary);
    transition: all var(--transition);
}

.stat-item:hover {
    background-color: var(--surface);
    box-shadow: var(--shadow-md);
    border-color: var(--border-hover);
    border-left-color: var(--primary);
}

.stat-item h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.stat-item p {
    color: var(--text-muted);
    font-size: 0.9375rem;
    line-height: 1.6;
}

/* ==========================================================================
   CTA Section (Solid Executive Slate)
   ========================================================================== */
.cta {
    background-color: var(--dark-900);
    color: #ffffff;
    padding: 80px 0;
    text-align: center;
    border-top: 1px solid var(--dark-border);
}

.cta-content {
    max-width: 680px;
    margin: 0 auto;
}

.cta-content h2 {
    font-size: 2.25rem;
    font-weight: 800;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
    color: #ffffff;
}

.cta-content p {
    font-size: 1.0625rem;
    margin-bottom: 2rem;
    color: var(--dark-text-muted);
    line-height: 1.6;
}

/* ==========================================================================
   Page Header (Services / Contact Secondary Pages)
   ========================================================================== */
.page-header {
    background-color: var(--dark-900);
    color: #ffffff;
    padding: 72px 0 64px;
    text-align: center;
    border-bottom: 1px solid var(--dark-border);
}

.page-header h1 {
    font-size: 2.75rem;
    font-weight: 800;
    margin-bottom: 0.875rem;
    letter-spacing: -0.02em;
    color: #ffffff;
}

.page-header p {
    font-size: 1.125rem;
    color: var(--dark-text-muted);
    max-width: 600px;
    margin: 0 auto;
}

/* ==========================================================================
   Services Page Styles
   ========================================================================== */
.services-overview {
    padding: 96px 0;
    background-color: var(--bg-page);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 2rem;
}

.service-card {
    background-color: var(--surface);
    border: 1px solid var(--border-color);
    border-top: 3px solid var(--primary);
    border-radius: var(--radius-lg);
    padding: 2.25rem;
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
}

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

.service-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.service-card p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
    font-size: 0.9375rem;
}

.service-features {
    list-style: none;
    margin-top: auto;
    padding-top: 1rem;
    border-top: 1px solid var(--border-subtle);
}

.service-features li {
    padding: 0.375rem 0;
    color: var(--text-secondary);
    position: relative;
    padding-left: 1.5rem;
    font-size: 0.875rem;
}

.service-features li::before {
    content: '▪';
    position: absolute;
    left: 0.25rem;
    color: var(--primary);
    font-size: 1rem;
    line-height: 1;
}

/* Service process */
.service-process {
    padding: 96px 0;
    background-color: var(--bg-muted);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

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

.step {
    text-align: center;
    padding: 1.75rem 1.25rem;
    background-color: var(--surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xs);
    transition: all var(--transition);
}

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

.step-number {
    width: 44px;
    height: 44px;
    background-color: var(--text-primary);
    color: #ffffff;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.125rem;
    font-weight: 700;
    margin: 0 auto 1.25rem;
    font-family: monospace;
}

.step:hover .step-number {
    background-color: var(--primary);
}

.step h3 {
    font-size: 1.0625rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.step p {
    color: var(--text-muted);
    font-size: 0.875rem;
    line-height: 1.5;
}

/* Service benefits */
.service-benefits {
    padding: 96px 0;
    background-color: var(--bg-page);
}

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

.benefit-item {
    text-align: left;
    padding: 1.75rem;
    background-color: var(--bg-muted);
    border: 1px solid var(--border-color);
    border-top: 3px solid var(--primary);
    border-radius: var(--radius-lg);
    transition: all var(--transition);
}

.benefit-item:hover {
    background-color: var(--surface);
    border-color: var(--border-hover);
    border-top-color: var(--primary-hover);
    box-shadow: var(--shadow-md);
}

.benefit-item h3 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 0.625rem;
    color: var(--text-primary);
}

.benefit-item p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.6;
}

/* ==========================================================================
   Contact Page Styles & Form
   ========================================================================== */
.contact-info {
    padding: 72px 0;
    background-color: var(--bg-muted);
    border-bottom: 1px solid var(--border-color);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.75rem;
    max-width: 800px;
    margin: 0 auto;
}

.contact-card {
    background-color: var(--surface);
    padding: 2.25rem 2rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    border-top: 3px solid var(--primary);
    text-align: center;
    box-shadow: var(--shadow-xs);
    transition: all var(--transition);
}

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

.contact-card h3 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.contact-card p {
    color: var(--primary);
    font-weight: 600;
    font-size: 1.0625rem;
    margin-bottom: 0.5rem;
}

.contact-card small {
    color: var(--text-muted);
    font-size: 0.8125rem;
}

/* FAQ section */
.faq-section {
    padding: 96px 0;
    background-color: var(--bg-page);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background-color: var(--bg-muted);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    padding: 1.5rem 1.75rem;
    margin-bottom: 1.25rem;
    transition: all var(--transition);
}

.faq-item:hover {
    background-color: var(--surface);
    border-color: var(--border-hover);
    box-shadow: var(--shadow-xs);
}

.faq-item h3 {
    font-size: 1.0625rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.faq-item h3::before {
    content: 'Q.';
    color: var(--primary);
    font-weight: 800;
    font-family: monospace;
}

.faq-item p {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 0.9375rem;
}

/* Form Styles */
.btn-submit {
    width: 100%;
    background-color: var(--primary);
    color: #ffffff;
    border: 1px solid var(--primary);
    padding: 12px 20px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background-color var(--transition);
}

.btn-submit:hover {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
}

/* ==========================================================================
   Footer (Solid Deep Dark Tone)
   ========================================================================== */
.footer {
    background-color: var(--dark-950);
    color: var(--dark-text-muted);
    padding: 72px 0 32px;
    border-top: 1px solid var(--dark-border);
}

.footer-content {
    display: grid;
    grid-template-columns: 1.2fr 1.8fr;
    gap: 4rem;
    margin-bottom: 3rem;
}

.footer-info h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.875rem;
    color: #ffffff;
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer-info h3::before {
    content: '';
    display: inline-block;
    width: 8px;
    height: 8px;
    background-color: var(--primary);
    border-radius: 2px;
}

.footer-info p {
    color: var(--dark-text-muted);
    margin-bottom: 0.5rem;
    font-size: 0.9375rem;
    line-height: 1.6;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 2rem;
}

.link-group h4 {
    font-size: 0.875rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
    color: #ffffff;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.link-group ul {
    list-style: none;
}

.link-group li {
    margin-bottom: 0.625rem;
}

.link-group a {
    color: var(--dark-text-muted);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color var(--transition);
}

.link-group a:hover {
    color: #ffffff;
}

.footer-bottom {
    border-top: 1px solid var(--dark-border);
    padding-top: 2rem;
    text-align: center;
}

.footer-bottom p {
    color: #64748b;
    font-size: 0.8125rem;
}

/* ==========================================================================
   Responsive Design
   ========================================================================== */
@media (max-width: 992px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .hero-subtitle {
        max-width: 100%;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }
}

@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background-color: #ffffff;
        flex-direction: column;
        padding: 1.5rem;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
        gap: 1.25rem;
        align-items: flex-start;
    }

    .nav-menu.active {
        display: flex;
    }

    .hero {
        padding: 64px 0 72px;
    }

    .hero-title {
        font-size: 2.375rem;
    }

    .section-header h2 {
        font-size: 1.875rem;
    }

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

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

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

    .btn {
        width: 100%;
    }
}