/* EEA - Edge Enterprise AI Official Website Styles */
/* Design Style: Enterprise-grade, Professional, Trustworthy */

/* ==================== CSS Variables ==================== */
:root {
  /* Primary Colors */
  --primary: #1E3A5F;
  --primary-light: #2a4a73;
  --primary-dark: #152a45;
  
  /* Secondary Colors */
  --secondary: #3B82F6;
  --secondary-light: #60a5fa;
  --secondary-dark: #2563eb;
  
  /* Accent Colors */
  --accent: #10B981;
  --accent-light: #34d399;
  --accent-dark: #059669;
  
  /* Background Colors */
  --bg-white: #F8FAFC;
  --bg-dark: #0F172A;
  --bg-darker: #020617;
  
  /* Text Colors */
  --text-primary: #1E293B;
  --text-secondary: #64748B;
  --text-muted: #94A3B8;
  --text-white: #F8FAFC;
  
  /* Status Colors */
  --success: #22C55E;
  --warning: #F59E0B;
  --danger: #EF4444;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  --spacing-4xl: 6rem;
  
  /* Typography */
  --font-family: 'Noto Sans TC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  
  /* Font Sizes */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  --text-6xl: 3.75rem;
  
  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;
  
  /* Shadows */
  --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);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --shadow-glow: 0 0 40px rgba(59, 130, 246, 0.3);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms ease;
  
  /* Container */
  --container-max: 1200px;
  --container-padding: 1.5rem;
}

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

html {
  scroll-behavior: smooth;
}

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

/* ==================== Container ==================== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* ==================== Navigation ==================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(30, 58, 95, 0.1);
  transition: all var(--transition-base);
}

.navbar.scrolled {
  box-shadow: var(--shadow-md);
}

.nav-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  text-decoration: none;
  color: var(--primary);
  font-weight: 700;
  font-size: var(--text-xl);
}

.nav-logo .logo-image {
  height: 45px;
  width: auto;
  transition: transform var(--transition-base);
}

.nav-logo:hover .logo-image {
  transform: scale(1.05);
}

.logo-icon {
  width: 36px;
  height: 36px;
  color: var(--primary);
}

.logo-text {
  letter-spacing: 0.05em;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
  list-style: none;
}

.nav-link {
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  font-size: var(--text-base);
  padding: var(--spacing-sm) 0;
  position: relative;
  transition: color var(--transition-fast);
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--secondary);
  transition: width var(--transition-base);
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--primary);
  transition: all var(--transition-fast);
}

/* ==================== Page Sections ==================== */
.page {
  display: none;
  min-height: 100vh;
  padding-top: 70px;
}

.page.active {
  display: block;
}

.page-header {
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.95) 0%, rgba(30, 58, 95, 0.9) 100%),
              url('/assets/features-bg.jpg') center center / cover no-repeat;
  padding: var(--spacing-4xl) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 30% 50%, rgba(59, 130, 246, 0.2) 0%, transparent 50%);
  pointer-events: none;
}

.page-title {
  font-size: var(--text-5xl);
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: var(--spacing-md);
  position: relative;
}

.page-subtitle {
  font-size: var(--text-xl);
  color: var(--text-muted);
  position: relative;
}

/* Features page header */
.features-header {
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.95) 0%, rgba(30, 58, 95, 0.9) 100%),
              url('/assets/features-bg.jpg') center center / cover no-repeat;
}

/* About page header */
.about-header {
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.95) 0%, rgba(30, 58, 95, 0.9) 100%),
              url('/assets/about-bg.jpg') center center / cover no-repeat;
}

/* ==================== Hero Section ==================== */
.hero-section {
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.95) 0%, rgba(30, 58, 95, 0.9) 100%),
              url('/assets/hero-bg.jpg') center center / cover no-repeat;
  min-height: calc(100vh - 70px);
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.hero-bg-pattern {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    radial-gradient(circle at 20% 80%, rgba(59, 130, 246, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(16, 185, 129, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 40% 40%, rgba(139, 92, 246, 0.08) 0%, transparent 40%);
  pointer-events: none;
}

.hero-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--spacing-4xl) var(--container-padding) 160px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-4xl);
  align-items: center;
}

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

.hero-title {
  margin-bottom: var(--spacing-lg);
}

.title-highlight {
  display: block;
  font-size: var(--text-5xl);
  font-weight: 700;
  color: var(--text-white);
  line-height: 1.1;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #ffffff 0%, #60a5fa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.title-sub {
  display: block;
  font-size: var(--text-2xl);
  font-weight: 500;
  color: var(--secondary-light);
  margin-top: var(--spacing-sm);
}

.hero-tagline {
  font-size: var(--text-xl);
  color: var(--accent-light);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  padding: var(--spacing-sm) var(--spacing-md);
  background: rgba(16, 185, 129, 0.1);
  border-left: 3px solid var(--accent);
  display: inline-block;
}

.hero-description {
  font-size: var(--text-lg);
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: var(--spacing-xl);
}

.hero-actions {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

/* ==================== Buttons ==================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  font-family: var(--font-family);
  font-size: var(--text-base);
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-lg);
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
}

.btn-primary {
  background: linear-gradient(135deg, var(--secondary) 0%, var(--secondary-dark) 100%);
  color: white;
  box-shadow: 0 4px 14px rgba(59, 130, 246, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(59, 130, 246, 0.5);
}

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

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.5);
}

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

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

.btn-large {
  padding: var(--spacing-lg) var(--spacing-2xl);
  font-size: var(--text-lg);
}

.btn-full {
  width: 100%;
}

/* ==================== Hero Illustration ==================== */
.hero-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-illustration {
  width: 400px;
  height: 400px;
  position: relative;
}

.illustration-node {
  position: absolute;
  animation: float 6s ease-in-out infinite;
}

.illustration-node svg {
  filter: drop-shadow(0 10px 30px rgba(0, 0, 0, 0.3));
}

.node-center {
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 120px;
  height: 120px;
  animation-delay: 0s;
}

.node-1 {
  top: 10%;
  left: 10%;
  width: 80px;
  height: 80px;
  animation-delay: 1s;
}

.node-2 {
  top: 10%;
  right: 10%;
  width: 60px;
  height: 60px;
  animation-delay: 2s;
}

.node-3 {
  bottom: 8%;
  right: 5%;
  width: 70px;
  height: 70px;
  animation-delay: 3s;
}

.node-4 {
  bottom: 40px;
  left: 30px;
  width: 60px;
  height: 60px;
  animation-delay: 1.5s;
}

.illustration-line {
  position: absolute;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(59, 130, 246, 0.5), transparent);
  transform-origin: left center;
}

.line-1 {
  width: 150px;
  top: 50%;
  left: 50%;
  transform: rotate(-45deg) translateX(-75px);
}

.line-2 {
  width: 180px;
  top: 50%;
  left: 50%;
  transform: rotate(30deg) translateX(-90px);
}

.line-3 {
  width: 120px;
  top: 50%;
  left: 50%;
  transform: rotate(-120deg) translateX(-60px);
}

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

/* ==================== Hero Goals Bar ==================== */
.hero-goals-bar {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 5;
  background: linear-gradient(transparent 0%, rgba(15, 23, 42, 0.85) 100%);
  padding: 30px 0 16px;
  pointer-events: none;
}

.hero-goals-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  pointer-events: auto;
}

.hero-goals-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  flex-wrap: wrap;
}

.goal-chip {
  position: relative;
  cursor: pointer;
  padding: 7px 18px;
  border-radius: 8px;
  font-size: 0.825rem;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  user-select: none;
  letter-spacing: 0.02em;
}

.goal-chip-blue {
  background: linear-gradient(135deg, #eff6ff, #dbeafe);
  border: 1px solid #93c5fd;
  color: #1d4ed8;
}
.goal-chip-blue:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.25);
}

.goal-chip-green {
  background: linear-gradient(135deg, #f0fdf4, #dcfce7);
  border: 1px solid #86efac;
  color: #15803d;
}
.goal-chip-green:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(22, 163, 74, 0.25);
}

.goal-chip-yellow {
  background: linear-gradient(135deg, #fffbeb, #fef3c7);
  border: 1px solid #fcd34d;
  color: #b45309;
}
.goal-chip-yellow:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(217, 119, 6, 0.25);
}

.goal-chip-purple {
  background: linear-gradient(135deg, #f3e8ff, #e9d5ff);
  border: 1px solid #c084fc;
  color: #7c3aed;
}
.goal-chip-purple:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(124, 58, 237, 0.25);
}

.goal-chip-cyan {
  background: linear-gradient(135deg, #0891b2, #0e7490);
  border: 1px solid #22d3ee;
  color: #fff;
}
.goal-chip-cyan:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(14, 116, 144, 0.3);
}

.goal-arrow {
  font-size: 1.1rem;
  color: rgba(148, 163, 184, 0.5);
  margin: 0 4px;
}

.goal-up {
  font-size: 0.65rem;
  color: #94a3b8;
  line-height: 1;
  align-self: flex-start;
}

.goal-chip-spacer {
  width: 28px;
}

/* Goal Chip Tooltip */
.goal-tooltip {
  position: absolute;
  bottom: calc(100% + 12px);
  left: 50%;
  transform: translateX(-50%);
  background: #1e293b;
  color: #f1f5f9;
  padding: 10px 14px;
  border-radius: 10px;
  font-size: 0.75rem;
  font-weight: 400;
  line-height: 1.5;
  width: 220px;
  text-align: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
  pointer-events: none;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
  z-index: 100;
}

.goal-tooltip::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: #1e293b;
}

.goal-chip:hover .goal-tooltip {
  opacity: 1;
  visibility: visible;
}

/* ==================== Goals Detail Image Section ==================== */
.goals-detail-section {
  padding: var(--spacing-4xl) 0;
  background: var(--bg-white);
  position: relative;
}

.goals-detail-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(30, 58, 95, 0.08), transparent);
}

.goals-detail-wrapper {
  text-align: center;
}

.goals-detail-image {
  max-width: 880px;
  width: 100%;
  height: auto;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.goals-detail-image:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-2xl);
}

/* ==================== Stats Section ==================== */
.stats-section {
  background: white;
  padding: var(--spacing-3xl) 0;
  border-bottom: 1px solid rgba(30, 58, 95, 0.1);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-xl);
  text-align: center;
}

.stat-item {
  padding: var(--spacing-lg);
}

.stat-number {
  font-size: var(--text-4xl);
  font-weight: 700;
  color: var(--primary);
  margin-bottom: var(--spacing-xs);
}

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

/* ==================== Section Headers ==================== */
.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.section-title {
  font-size: var(--text-4xl);
  font-weight: 700;
  color: var(--primary);
  margin-bottom: var(--spacing-md);
}

.section-subtitle {
  font-size: var(--text-lg);
  color: var(--text-secondary);
}

/* ==================== Features Highlight Section ==================== */
.features-highlight-section {
  padding: var(--spacing-4xl) 0;
  background: white;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-xl);
}

.feature-card {
  background: white;
  border: 1px solid rgba(30, 58, 95, 0.1);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  transition: all var(--transition-base);
  cursor: pointer;
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: var(--secondary);
}

.feature-icon {
  width: 56px;
  height: 56px;
  margin-bottom: var(--spacing-lg);
}

.feature-icon svg {
  width: 100%;
  height: 100%;
}

.feature-title {
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--primary);
  margin-bottom: var(--spacing-sm);
}

.feature-desc {
  font-size: var(--text-base);
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ==================== Audience Section ==================== */
.audience-section {
  padding: var(--spacing-4xl) 0;
  background: var(--bg-white);
}

.audience-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-lg);
}

.audience-card {
  background: white;
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  text-align: center;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
}

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

.audience-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
}

.audience-title {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--primary);
  margin-bottom: var(--spacing-sm);
}

.audience-pain {
  font-size: var(--text-sm);
  color: var(--danger);
  margin-bottom: var(--spacing-sm);
}

.audience-solution {
  font-size: var(--text-sm);
  color: var(--accent-dark);
  font-weight: 500;
}

/* ==================== CTA Section ==================== */
.cta-section {
  padding: var(--spacing-4xl) 0;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  text-align: center;
}

.cta-content {
  max-width: 600px;
  margin: 0 auto;
}

.cta-title {
  font-size: var(--text-4xl);
  font-weight: 700;
  color: white;
  margin-bottom: var(--spacing-md);
}

.cta-description {
  font-size: var(--text-lg);
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: var(--spacing-xl);
}

/* ==================== Architecture Overview ==================== */
.architecture-overview-section {
  padding: var(--spacing-4xl) 0 var(--spacing-2xl);
  background: linear-gradient(180deg, #F8FAFC 0%, #ffffff 100%);
}

.architecture-overview {
  text-align: center;
  max-width: 960px;
  margin: 0 auto;
}

.architecture-title {
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--primary);
  margin-bottom: var(--spacing-md);
  position: relative;
  display: inline-block;
}

.architecture-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--secondary), var(--accent));
  border-radius: 2px;
  margin: var(--spacing-sm) auto 0;
}

.architecture-desc {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: var(--spacing-2xl);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.architecture-image-wrapper {
  background: linear-gradient(135deg, #F1F5F9 0%, #E2E8F0 100%);
  border-radius: var(--radius-2xl);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-xl);
  border: 1px solid rgba(30, 58, 95, 0.08);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.architecture-image-wrapper:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-2xl);
}

.architecture-image {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-xl);
}

/* ==================== Module Detail Sections ==================== */
.module-detail-section {
  padding: var(--spacing-4xl) 0;
  background: #F8FAFC;
}

.module-block {
  margin-bottom: var(--spacing-xl);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  background: white;
  border: 1px solid #E2E8F0;
  transition: box-shadow var(--transition-base);
}

.module-block:hover {
  box-shadow: var(--shadow-lg);
}

.module-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-xl) var(--spacing-2xl);
  cursor: pointer;
  user-select: none;
  transition: background var(--transition-fast);
  gap: var(--spacing-lg);
}

.module-header:hover {
  background: #F1F5F9;
}

.module-header:active {
  background: #E2E8F0;
}

.module-header-info {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  min-width: 0;
}

.module-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 80px;
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-full);
  color: white;
  font-size: var(--text-xs);
  font-weight: 600;
  white-space: nowrap;
  flex-shrink: 0;
}

.module-title {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--primary);
  line-height: 1.3;
}

.module-subtitle {
  font-size: var(--text-sm);
  color: var(--text-muted);
  margin-top: 2px;
}

.module-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  flex-shrink: 0;
}

.module-count {
  font-size: var(--text-xs);
  color: var(--text-muted);
  background: #F1F5F9;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.module-arrow {
  font-size: var(--text-lg);
  color: var(--text-muted);
  transition: transform var(--transition-base);
  display: inline-block;
}

.module-block.expanded .module-arrow {
  transform: rotate(180deg);
}

.module-block.expanded .module-header {
  border-bottom: 1px solid #E2E8F0;
  background: #F8FAFC;
}

.module-content {
  padding: var(--spacing-2xl);
}

.module-content .feature-detail-card {
  margin-bottom: var(--spacing-2xl);
}

.module-content .feature-detail-card:last-child {
  margin-bottom: 0;
}

/* Feature Sub Links (buttons) */
.feature-sub-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-lg);
  padding-top: var(--spacing-lg);
  border-top: 1px solid #E2E8F0;
}

.feature-sub-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 14px;
  background: #F1F5F9;
  border: 1px solid #E2E8F0;
  border-radius: var(--radius-full);
  color: var(--primary);
  font-size: var(--text-xs);
  font-weight: 500;
  text-decoration: none;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.feature-sub-link:hover {
  background: var(--secondary);
  border-color: var(--secondary);
  color: white;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.feature-sub-link:active {
  transform: translateY(0);
}

/* ==================== Feature Detail Section ==================== */
.feature-detail-section {
  padding: var(--spacing-4xl) 0;
  background: white;
}

.feature-detail-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
  margin-bottom: var(--spacing-4xl);
  padding: var(--spacing-3xl);
  background: var(--bg-white);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-lg);
}

.feature-detail-card.reverse {
  direction: rtl;
}

.feature-detail-card.reverse > * {
  direction: ltr;
}

.feature-detail-number {
  font-size: var(--text-6xl);
  font-weight: 800;
  color: rgba(59, 130, 246, 0.1);
  line-height: 1;
  margin-bottom: var(--spacing-md);
}

.feature-detail-title {
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--primary);
  margin-bottom: var(--spacing-lg);
  line-height: 1.3;
}

.feature-detail-desc {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: var(--spacing-xl);
}

.feature-detail-list {
  list-style: none;
  padding: 0;
}

.feature-detail-list li {
  position: relative;
  padding-left: var(--spacing-xl);
  margin-bottom: var(--spacing-sm);
  color: var(--text-secondary);
}

.feature-detail-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: bold;
}

.feature-detail-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: var(--spacing-lg);
  font-size: var(--text-sm);
}

.table-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  border-bottom: 1px solid rgba(30, 58, 95, 0.1);
}

.table-cell {
  padding: var(--spacing-md);
  color: var(--text-secondary);
}

.table-header {
  font-weight: 600;
  color: var(--primary);
  background: var(--bg-white);
}

/* ==================== Visual Diagrams ==================== */
.feature-detail-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 300px;
}

/* Screenshot Wrapper */
.screenshot-wrapper {
  position: relative;
  width: 100%;
  max-width: 500px;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-2xl);
  transition: transform var(--transition-base);
}

.screenshot-wrapper:hover {
  transform: translateY(-4px);
}

/* Screenshot Lightbox */
.screenshot-lightbox {
  display: none;
  position: fixed;
  z-index: 9999;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.85);
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(4px);
  animation: lightboxFadeIn 0.2s ease;
}

@keyframes lightboxFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.screenshot-lightbox-content {
  position: relative;
  max-width: 90vw;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  animation: lightboxZoomIn 0.25s ease;
}

@keyframes lightboxZoomIn {
  from { transform: scale(0.8); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

.screenshot-lightbox-content img {
  max-width: 100%;
  max-height: 80vh;
  width: auto;
  height: auto;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-2xl), 0 0 60px rgba(0, 0, 0, 0.5);
  display: block;
}

.screenshot-lightbox-caption {
  color: rgba(255, 255, 255, 0.8);
  font-size: var(--text-base);
  margin-top: var(--spacing-lg);
  text-align: center;
  font-weight: 500;
}

.screenshot-lightbox-close {
  position: absolute;
  top: 24px;
  right: 32px;
  color: rgba(255, 255, 255, 0.7);
  font-size: 40px;
  font-weight: 300;
  cursor: pointer;
  z-index: 10000;
  line-height: 1;
  transition: color var(--transition-fast);
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.screenshot-lightbox-close:hover {
  color: #fff;
}

.screenshot-image {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-xl);
  cursor: zoom-in;
  transition: transform var(--transition-fast);
}

.screenshot-image:active {
  transform: scale(0.98);
}

.screenshot-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--spacing-md);
  background: linear-gradient(transparent, rgba(15, 23, 42, 0.9));
  color: white;
  font-size: var(--text-sm);
  font-weight: 500;
  text-align: center;
}

.visual-diagram {
  background: linear-gradient(135deg, var(--bg-dark) 0%, var(--primary-dark) 100%);
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl);
  color: white;
  text-align: center;
  width: 100%;
  max-width: 400px;
}

/* Hybrid Diagram */
.hybrid-diagram {
  position: relative;
  height: 300px;
}

.diagram-center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--secondary);
  padding: var(--spacing-lg) var(--spacing-xl);
  border-radius: var(--radius-lg);
  font-weight: 600;
}

.diagram-node {
  position: absolute;
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 500;
}

.node-local {
  top: 20%;
  left: 10%;
  background: var(--accent);
}

.node-cloud {
  top: 20%;
  right: 10%;
  background: var(--secondary);
}

.node-edge {
  bottom: 20%;
  left: 50%;
  transform: translateX(-50%);
  background: #8B5CF6;
}

/* Knowledge Diagram */
.knowledge-diagram {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.pipeline-step {
  background: rgba(255, 255, 255, 0.1);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  min-width: 80px;
}

.step-icon {
  font-size: var(--text-2xl);
  margin-bottom: var(--spacing-xs);
}

.step-label {
  font-size: var(--text-sm);
}

.pipeline-arrow {
  font-size: var(--text-2xl);
  color: var(--secondary-light);
}

/* RAG Diagram */
.rag-diagram {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  padding: var(--spacing-xl);
}

.rag-input,
.rag-output,
.rag-merge {
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  font-weight: 500;
}

.rag-input {
  background: rgba(255, 255, 255, 0.1);
}

.rag-split {
  display: flex;
  gap: var(--spacing-md);
}

.rag-branch {
  flex: 1;
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
}

.branch-a {
  background: rgba(59, 130, 246, 0.3);
}

.branch-b {
  background: rgba(139, 92, 246, 0.3);
}

.rag-merge {
  background: var(--secondary);
}

.rag-output {
  background: var(--accent);
}

/* RAG Comparison */
.rag-comparison {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.rag-track {
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  border-left: 3px solid;
}

.track-a {
  border-color: var(--secondary);
  background: rgba(59, 130, 246, 0.05);
}

.track-b {
  border-color: #8B5CF6;
  background: rgba(139, 92, 246, 0.05);
}

.track-label {
  font-weight: 600;
  color: var(--primary);
  margin-bottom: var(--spacing-xs);
}

.track-content {
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

/* Pipeline Flow */
.pipeline-flow {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
}

.flow-step {
  padding: var(--spacing-md) var(--spacing-xl);
  background: var(--bg-white);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--text-secondary);
  border: 1px solid rgba(30, 58, 95, 0.1);
}

.flow-step.highlight {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}

.flow-arrow {
  color: var(--text-muted);
}

/* Data Diagram */
.data-diagram {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  padding: var(--spacing-xl);
}

.data-nl {
  background: rgba(16, 185, 129, 0.2);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
}

.data-arrow {
  font-size: var(--text-2xl);
  color: var(--secondary-light);
}

.data-sql {
  background: rgba(0, 0, 0, 0.3);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-align: left;
  overflow-x: auto;
}

/* Tool Categories */
.tool-categories {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.tool-category {
  background: var(--bg-white);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  text-align: center;
  border: 1px solid rgba(30, 58, 95, 0.1);
}

.category-icon {
  font-size: var(--text-2xl);
  margin-bottom: var(--spacing-sm);
}

.category-name {
  font-weight: 600;
  color: var(--primary);
  margin-bottom: var(--spacing-xs);
}

.category-examples {
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

/* MCP Diagram */
.mcp-diagram {
  position: relative;
  min-height: 200px;
}

.mcp-center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--secondary);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  font-weight: 600;
}

.mcp-tool {
  position: absolute;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  background: rgba(255, 255, 255, 0.1);
}

.tool-1 { top: 10%; left: 10%; }
.tool-2 { top: 10%; right: 10%; }
.tool-3 { bottom: 10%; left: 10%; }
.tool-4 { bottom: 10%; right: 10%; }

/* BPA Diagram */
.bpa-diagram {
  padding: var(--spacing-xl);
}

.bpa-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.bpa-node {
  padding: var(--spacing-sm) var(--spacing-md);
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
}

.bpa-arrow {
  color: var(--secondary-light);
}

/* ==================== Security Section ==================== */
.security-section {
  padding: var(--spacing-4xl) 0;
  background: linear-gradient(135deg, var(--bg-dark) 0%, var(--primary-dark) 100%);
}

.security-section .section-title,
.security-section .section-subtitle {
  color: white;
}

.security-section .section-subtitle {
  color: var(--text-muted);
}

.security-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--spacing-lg);
}

.security-item {
  background: rgba(255, 255, 255, 0.05);
  padding: var(--spacing-xl);
  border-radius: var(--radius-xl);
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all var(--transition-base);
}

.security-item:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-4px);
}

.security-icon {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
}

.security-item h3 {
  font-size: var(--text-lg);
  font-weight: 600;
  color: white;
  margin-bottom: var(--spacing-sm);
}

.security-item p {
  font-size: var(--text-sm);
  color: var(--text-muted);
}

/* ==================== About Section ==================== */
.about-section {
  padding: var(--spacing-4xl) 0;
  background: white;
}

.about-block {
  margin-bottom: var(--spacing-4xl);
}

.about-title {
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--primary);
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-md);
  border-bottom: 3px solid var(--secondary);
  display: inline-block;
}

.about-content {
  max-width: 900px;
}

.about-lead {
  font-size: var(--text-xl);
  color: var(--text-primary);
  line-height: 1.8;
  margin-bottom: var(--spacing-lg);
}

.about-content p {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: var(--spacing-lg);
}

.about-list {
  list-style: none;
  padding: 0;
  margin-top: var(--spacing-xl);
}

.about-list li {
  position: relative;
  padding-left: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
  font-size: var(--text-lg);
  color: var(--text-secondary);
}

.about-list li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--secondary);
  font-weight: bold;
}

/* Architecture Diagram */
.architecture-diagram {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-2xl);
  background: var(--bg-white);
  border-radius: var(--radius-xl);
  max-width: 800px;
  margin: 0 auto;
}

.arch-layer {
  width: 100%;
  background: white;
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
  text-align: center;
}

.layer-title {
  font-weight: 600;
  color: var(--primary);
  margin-bottom: var(--spacing-md);
  font-size: var(--text-lg);
}

.layer-components {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

.arch-component {
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--bg-white);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--text-secondary);
  border: 1px solid rgba(30, 58, 95, 0.1);
}

.arch-arrow {
  font-size: var(--text-2xl);
  color: var(--text-muted);
}

.layer-client { border-left: 4px solid var(--secondary); }
.layer-agent { border-left: 4px solid var(--accent); }
.layer-ai { border-left: 4px solid #8B5CF6; }
.layer-data { border-left: 4px solid var(--warning); }

/* Tech Stack Grid */
.tech-stack-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-xl);
}

.tech-category {
  background: var(--bg-white);
  padding: var(--spacing-xl);
  border-radius: var(--radius-xl);
}

.tech-category h3 {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--primary);
  margin-bottom: var(--spacing-md);
}

.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.tech-tag {
  padding: var(--spacing-xs) var(--spacing-md);
  background: white;
  border: 1px solid rgba(30, 58, 95, 0.1);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.tech-tag:hover {
  background: var(--secondary);
  color: white;
  border-color: var(--secondary);
}

/* ==================== Contact Section ==================== */
.contact-section {
  padding: var(--spacing-4xl) 0;
  background: white;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: var(--spacing-3xl);
}

.contact-form-wrapper {
  background: var(--bg-white);
  padding: var(--spacing-2xl);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
}

.contact-form-title {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--primary);
  margin-bottom: var(--spacing-xl);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.form-group label {
  font-weight: 500;
  color: var(--text-primary);
  font-size: var(--text-base);
}

.required {
  color: var(--danger);
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: var(--spacing-md);
  border: 1px solid rgba(30, 58, 95, 0.2);
  border-radius: var(--radius-md);
  font-family: var(--font-family);
  font-size: var(--text-base);
  transition: all var(--transition-fast);
  background: white;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--secondary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-success {
  text-align: center;
  padding: var(--spacing-2xl);
}

.success-icon {
  width: 80px;
  height: 80px;
  background: var(--accent);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  margin: 0 auto var(--spacing-lg);
}

.form-success h3 {
  font-size: var(--text-xl);
  color: var(--primary);
  margin-bottom: var(--spacing-sm);
}

.form-success p {
  color: var(--text-secondary);
}

/* Contact Info */
.contact-info-wrapper {
  padding: var(--spacing-xl);
}

.contact-info-title {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--primary);
  margin-bottom: var(--spacing-xl);
}

.contact-info-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.contact-info-item {
  display: flex;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  background: var(--bg-white);
  border-radius: var(--radius-lg);
}

.info-icon {
  width: 48px;
  height: 48px;
  background: var(--secondary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.info-icon svg {
  width: 24px;
  height: 24px;
  color: white;
}

.info-content h3 {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--primary);
  margin-bottom: var(--spacing-xs);
}

.info-content p {
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

.contact-cta {
  margin-top: var(--spacing-2xl);
  padding: var(--spacing-xl);
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  border-radius: var(--radius-xl);
  text-align: center;
}

.contact-cta h3 {
  font-size: var(--text-lg);
  color: white;
  margin-bottom: var(--spacing-sm);
}

.contact-cta p {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: var(--spacing-md);
}

/* ==================== Footer ==================== */
.footer {
  background: var(--bg-darker);
  color: var(--text-muted);
  padding: var(--spacing-4xl) 0 var(--spacing-xl);
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--spacing-3xl);
  margin-bottom: var(--spacing-2xl);
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: white;
  text-decoration: none;
  font-weight: 700;
  font-size: var(--text-xl);
  margin-bottom: var(--spacing-md);
}

.footer-logo-img {
  height: 50px;
  width: auto;
  transition: transform var(--transition-base);
}

.footer-logo:hover .footer-logo-img {
  transform: scale(1.05);
}

.footer-logo .logo-icon {
  width: 32px;
  height: 32px;
}

.footer-tagline {
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--text-muted);
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-xl);
}

.footer-column h4 {
  color: white;
  font-size: var(--text-base);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
}

.footer-column a {
  display: block;
  color: var(--text-muted);
  text-decoration: none;
  font-size: var(--text-sm);
  margin-bottom: var(--spacing-sm);
  transition: color var(--transition-fast);
}

.footer-column a:hover {
  color: var(--secondary-light);
}

.footer-bottom {
  padding-top: var(--spacing-xl);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  font-size: var(--text-sm);
}

/* ==================== Responsive Design ==================== */
@media (max-width: 1024px) {
  .hero-container {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .hero-visual {
    display: none;
  }
  
  .hero-actions {
    justify-content: center;
  }
  
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .audience-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .feature-detail-card {
    grid-template-columns: 1fr;
  }
  
  .feature-detail-card.reverse {
    direction: ltr;
  }
  
  .feature-detail-visual {
    order: -1;
  }
  
  .security-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .contact-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .footer-links {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-lg);
    gap: 0;
  }
  
  .nav-menu.active {
    display: flex;
  }
  
  .nav-link {
    padding: var(--spacing-md);
    border-bottom: 1px solid rgba(30, 58, 95, 0.1);
  }
  
  .nav-toggle {
    display: flex;
  }
  
  .title-highlight {
    font-size: var(--text-4xl);
  }
  
  .title-sub {
    font-size: var(--text-xl);
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .audience-grid {
    grid-template-columns: 1fr;
  }
  
  .security-grid {
    grid-template-columns: 1fr;
  }
  
  .tech-stack-grid {
    grid-template-columns: 1fr;
  }
  
  .page-title {
    font-size: var(--text-3xl);
  }
  
  .page-subtitle {
    font-size: var(--text-lg);
  }
  
  .section-title {
    font-size: var(--text-2xl);
  }
  
  .feature-detail-title {
    font-size: var(--text-2xl);
  }
  
  .about-title {
    font-size: var(--text-2xl);
  }
  
  .footer-links {
    grid-template-columns: 1fr;
    text-align: center;
  }
}

@media (max-width: 480px) {
  :root {
    --container-padding: 1rem;
  }
  
  .title-highlight {
    font-size: var(--text-3xl);
  }
  
  .hero-tagline {
    font-size: var(--text-base);
  }
  
  .hero-description {
    font-size: var(--text-base);
  }
  
  .btn {
    width: 100%;
  }
  
  .hero-actions {
    flex-direction: column;
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
  }
  
  .table-row {
    grid-template-columns: 1fr;
  }
  
  .tool-categories {
    grid-template-columns: 1fr;
  }

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

.download-section {
  padding: 80px 0;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
}

.download-section .section-header {
  text-align: center;
  margin-bottom: 48px;
}

.download-section .section-title {
  color: #ffffff;
  font-size: 2rem;
  font-weight: 700;
  margin: 0 0 12px;
}

.download-section .section-subtitle {
  color: #94a3b8;
  font-size: 1.1rem;
  margin: 0;
}

.download-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 960px;
  margin: 0 auto;
}

.download-card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  padding: 32px 24px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.download-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 255, 255, 0.2);
}

.download-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.download-icon svg {
  width: 48px;
  height: 48px;
}

.download-card h3 {
  color: #ffffff;
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0;
}

.download-subtitle {
  color: #94a3b8;
  font-size: 0.85rem;
  margin: 0;
}

.download-version {
  color: #3B82F6;
  font-size: 0.8rem;
  font-weight: 500;
  margin: 0;
}

.download-note {
  text-align: center;
  color: #64748b;
  font-size: 0.8rem;
  margin-top: 24px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.6;
}

#downloadLocked {
  justify-content: center;
}

#downloadLocked .download-card {
  max-width: 400px;
  margin: 0 auto;
  border-color: rgba(148, 163, 184, 0.3);
}

#downloadLocked .download-card:hover {
  transform: none;
  border-color: rgba(148, 163, 184, 0.5);
}

@media (max-width: 768px) {
  .module-header {
    flex-direction: column;
    align-items: flex-start;
    padding: var(--spacing-lg);
  }

  .module-header-info {
    align-items: flex-start;
  }

  .module-meta {
    margin-top: var(--spacing-sm);
    width: 100%;
    justify-content: space-between;
  }

  .module-title {
    font-size: var(--text-xl);
  }

  .module-content {
    padding: var(--spacing-lg);
  }

  .module-badge {
    font-size: 11px;
    padding: 2px 10px;
  }

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