@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Noto+Sans+SC:wght@300;400;500;600;700&display=swap');

:root {
  --primary-50: #f0f9ff;
  --primary-100: #e0f2fe;
  --primary-200: #bae6fd;
  --primary-300: #7dd3fc;
  --primary-400: #38bdf8;
  --primary-500: #0ea5e9;
  --primary-600: #0284c7;
  --primary-700: #0369a1;
  --primary-800: #075985;
  --primary-900: #0c4a6e;
  
  --primary-50-rgb: 240, 249, 255;
  --primary-100-rgb: 224, 242, 254;
  --primary-200-rgb: 186, 230, 253;
  --primary-300-rgb: 125, 211, 252;
  --primary-400-rgb: 56, 189, 248;
  --primary-500-rgb: 14, 165, 233;
  --primary-600-rgb: 2, 132, 199;
  --primary-700-rgb: 3, 105, 161;
  --primary-800-rgb: 7, 89, 133;
  --primary-900-rgb: 12, 74, 110;
  
  --neutral-50: #fafafa;
  --neutral-100: #f4f4f5;
  --neutral-200: #e4e4e7;
  --neutral-300: #d4d4d8;
  --neutral-400: #a1a1aa;
  --neutral-500: #71717a;
  --neutral-600: #52525b;
  --neutral-700: #3f3f46;
  --neutral-800: #27272a;
  --neutral-900: #18181b;
  
  --neutral-50-rgb: 250, 250, 250;
  --neutral-100-rgb: 244, 244, 245;
  --neutral-200-rgb: 228, 228, 231;
  --neutral-300-rgb: 212, 212, 216;
  --neutral-400-rgb: 161, 161, 170;
  --neutral-500-rgb: 113, 113, 122;
  --neutral-600-rgb: 82, 82, 91;
  --neutral-700-rgb: 63, 63, 70;
  --neutral-800-rgb: 39, 39, 42;
  --neutral-900-rgb: 24, 24, 27;
  
  --success-50: #f0fdf4;
  --success-500: #22c55e;
  --success-600: #16a34a;
  
  --warning-50: #fffbeb;
  --warning-500: #f59e0b;
  --warning-600: #d97706;
  
  --error-50: #fef2f2;
  --error-500: #ef4444;
  --error-600: #dc2626;
  
  --success-50-rgb: 240, 253, 244;
  --success-500-rgb: 34, 197, 94;
  --success-600-rgb: 22, 163, 74;
  
  --warning-50-rgb: 255, 251, 235;
  --warning-500-rgb: 245, 158, 11;
  --warning-600-rgb: 217, 119, 6;
  
  --error-50-rgb: 254, 242, 242;
  --error-500-rgb: 239, 68, 68;
  --error-600-rgb: 220, 38, 38;
  
  --bg-primary: #ffffff;
  --bg-secondary: #fafafa;
  --bg-tertiary: #f4f4f5;
  
  --text-primary: #18181b;
  --text-secondary: #52525b;
  --text-tertiary: #71717a;
  --text-inverse: #ffffff;
  
  --border-light: #e4e4e7;
  --border-medium: #d4d4d8;
  --border-dark: #a1a1aa;
  
  --font-sans: 'Noto Sans SC', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Code', monospace;
  
  --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;
  
  --leading-tight: 1.25;
  --leading-normal: 1.5;
  --leading-relaxed: 1.75;
  
  --tracking-tight: -0.025em;
  --tracking-normal: 0;
  --tracking-wide: 0.025em;
  
  --font-light: 300;
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  
  --shadow-xs: 0 1px 2px rgba(var(--neutral-900-rgb), 0.05);
  --shadow-sm: 0 1px 3px rgba(var(--neutral-900-rgb), 0.1);
  --shadow-md: 0 4px 6px rgba(var(--neutral-900-rgb), 0.1);
  --shadow-lg: 0 10px 15px rgba(var(--neutral-900-rgb), 0.1);
  --shadow-xl: 0 20px 25px rgba(var(--neutral-900-rgb), 0.1);
  --shadow-2xl: 0 25px 50px rgba(var(--neutral-900-rgb), 0.25);
  
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  cursor: pointer;
}

.nav {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-light);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  transition: all 0.3s ease;
}

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

.nav-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
  transition: opacity 0.2s ease;
}

.nav-brand:hover {
  opacity: 0.8;
}

.nav-logo {
  flex-shrink: 0;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.nav-link {
  color: var(--text-secondary);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  padding: var(--space-2) var(--space-4);
  border-radius: 0.375rem;
  transition: all 0.2s ease;
}

.nav-link:hover {
  color: var(--text-primary);
  background: var(--bg-tertiary);
}

.nav-link:active {
  background: var(--neutral-200);
}

.nav-link:focus {
  outline: 2px solid var(--primary-500);
  outline-offset: 2px;
}

.nav-link.active {
  color: var(--primary-600);
  background: var(--primary-50);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: var(--space-2);
  background: transparent;
  border: none;
  cursor: pointer;
}

.nav-toggle span {
  width: 20px;
  height: 2px;
  background: var(--text-primary);
  transition: all 0.3s ease;
}

.hero {
  position: relative;
  min-height: 90vh;
  display: flex;
  align-items: center;
  padding: var(--space-20) 0;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, var(--primary-50) 0%, var(--bg-primary) 50%, var(--primary-100) 100%);
  opacity: 0.5;
  z-index: -1;
}

.hero-content {
  max-width: 800px;
}

.hero-badge {
  margin-bottom: var(--space-6);
}

.hero-title {
  font-size: var(--text-5xl);
  font-weight: var(--font-bold);
  line-height: var(--leading-tight);
  margin-bottom: var(--space-6);
  letter-spacing: var(--tracking-tight);
}

.text-gradient {
  background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-400) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-description {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  margin-bottom: var(--space-8);
  max-width: 600px;
}

.hero-actions {
  display: flex;
  gap: var(--space-4);
  margin-bottom: var(--space-12);
}

.hero-stats {
  display: flex;
  gap: var(--space-12);
  padding-top: var(--space-8);
  border-top: 1px solid var(--border-light);
}

.stat-item {
  text-align: center;
}

.stat-value {
  font-size: var(--text-4xl);
  font-weight: var(--font-bold);
  color: var(--primary-600);
  margin-bottom: var(--space-2);
}

.stat-label {
  font-size: var(--text-sm);
  color: var(--text-tertiary);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.625rem 1.25rem;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  border-radius: 0.5rem;
  transition: all 0.2s ease;
  cursor: pointer;
  border: none;
  outline: none;
}

.btn-primary {
  background: var(--primary-600);
  color: var(--text-inverse);
}

.btn-primary:hover {
  background: var(--primary-700);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(var(--primary-600-rgb), 0.25);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: none;
}

.btn-primary:focus {
  outline: 2px solid var(--primary-500);
  outline-offset: 2px;
}

.btn-primary:disabled {
  background: var(--neutral-300);
  color: var(--neutral-500);
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

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

.btn-secondary:hover {
  background: var(--bg-secondary);
  border-color: var(--primary-500);
}

.btn-secondary:active {
  background: var(--bg-tertiary);
}

.btn-secondary:focus {
  outline: 2px solid var(--primary-500);
  outline-offset: 2px;
}

.btn-secondary:disabled {
  background: var(--neutral-100);
  color: var(--neutral-400);
  cursor: not-allowed;
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
}

.btn-ghost:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.btn-ghost:active {
  background: var(--neutral-200);
}

.btn-ghost:focus {
  outline: 2px solid var(--primary-500);
  outline-offset: 2px;
}

.btn-ghost:disabled {
  color: var(--neutral-400);
  cursor: not-allowed;
}

.btn-sm {
  padding: 0.375rem 0.75rem;
  font-size: var(--text-xs);
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  border-radius: 9999px;
  transition: all 0.2s ease;
}

.tag-primary {
  background: var(--primary-50);
  color: var(--primary-700);
}

.tag-primary:hover {
  background: var(--primary-100);
}

.tag-success {
  background: var(--success-50);
  color: var(--success-600);
}

.tag-warning {
  background: var(--warning-50);
  color: var(--warning-600);
}

.tag-error {
  background: var(--error-50);
  color: var(--error-600);
}

.section {
  padding: var(--space-20) 0;
}

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

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--space-12);
}

.section-title {
  font-size: var(--text-4xl);
  font-weight: var(--font-bold);
  margin: var(--space-4) 0;
  letter-spacing: var(--tracking-tight);
}

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

.card {
  background: var(--bg-primary);
  border: 1px solid var(--border-light);
  border-radius: 0.75rem;
  padding: var(--space-6);
  transition: all 0.3s ease;
}

.card:hover {
  border-color: var(--primary-300);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.card-elevated {
  background: var(--bg-primary);
  border-radius: 0.75rem;
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
}

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

.card-icon {
  margin-bottom: var(--space-4);
}

.card-title {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-3);
}

.card-description {
  color: var(--text-secondary);
  margin-bottom: var(--space-4);
  line-height: var(--leading-relaxed);
}

.card-stats {
  display: flex;
  gap: var(--space-6);
  margin-bottom: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--border-light);
}

.card-stat {
  flex: 1;
}

.card-stat-value {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--primary-600);
  display: block;
}

.card-stat-label {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--primary-600);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  transition: all 0.2s ease;
}

.card-link:hover {
  color: var(--primary-700);
  gap: var(--space-3);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-6);
}

.card-actions {
  display: flex;
  gap: var(--space-2);
}

.strategies-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.performance-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
  margin-bottom: var(--space-8);
}

.chart-container {
  position: relative;
  height: 300px;
  background: var(--bg-secondary);
  border-radius: 0.5rem;
  overflow: hidden;
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

.metric-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-light);
  border-radius: 0.75rem;
  padding: var(--space-6);
  display: flex;
  align-items: center;
  gap: var(--space-4);
  transition: all 0.3s ease;
}

.metric-card:hover {
  border-color: var(--primary-300);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.metric-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary-50);
  border-radius: 0.5rem;
}

.metric-value {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--text-primary);
  display: block;
}

.metric-label {
  font-size: var(--text-sm);
  color: var(--text-tertiary);
}

.data-table-container {
  overflow-x: auto;
  background: var(--bg-primary);
  border-radius: 0.75rem;
  border: 1px solid var(--border-light);
  margin-bottom: var(--space-8);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
}

.data-table thead {
  background: var(--bg-secondary);
  border-bottom: 2px solid var(--border-medium);
}

.data-table th {
  padding: var(--space-4) var(--space-6);
  text-align: left;
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--text-secondary);
  white-space: nowrap;
}

.data-table td {
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid var(--border-light);
  font-size: var(--text-sm);
}

.data-table tbody tr {
  transition: background 0.2s ease;
}

.data-table tbody tr:hover {
  background: var(--bg-secondary);
}

.data-table tbody tr:last-child td {
  border-bottom: none;
}

.text-success {
  color: var(--success-600);
}

.text-error {
  color: var(--error-600);
}

.chart-section {
  margin-top: var(--space-8);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: center;
}

.about-description {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  margin: var(--space-6) 0;
  line-height: var(--leading-relaxed);
}

.about-features {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  margin-top: var(--space-8);
}

.feature-item {
  display: flex;
  gap: var(--space-4);
}

.feature-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary-50);
  border-radius: 0.5rem;
}

.feature-content h4 {
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-1);
}

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

.about-image {
  display: flex;
  justify-content: center;
  align-items: center;
}

.image-placeholder {
  width: 100%;
  max-width: 400px;
  aspect-ratio: 1;
  background: var(--bg-tertiary);
  border-radius: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.footer {
  background: var(--neutral-900);
  color: var(--neutral-300);
  padding: var(--space-12) 0;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-6);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--text-inverse);
}

.footer-logo {
  flex-shrink: 0;
}

.footer-links {
  display: flex;
  gap: var(--space-8);
}

.footer-links a {
  color: var(--neutral-400);
  font-size: var(--text-sm);
  transition: color 0.2s ease;
}

.footer-links a:hover {
  color: var(--text-inverse);
}

.footer-copyright {
  text-align: center;
  padding-top: var(--space-6);
  border-top: 1px solid var(--neutral-800);
  width: 100%;
}

.footer-copyright p {
  font-size: var(--text-sm);
  color: var(--neutral-500);
  margin-bottom: var(--space-2);
}

.footer-disclaimer {
  font-size: var(--text-xs);
  color: var(--neutral-600);
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.animate-fadeInUp {
  animation: fadeInUp 0.6s ease-out forwards;
}

.animate-fadeIn {
  animation: fadeIn 0.5s ease-out forwards;
}

.animate-slideInLeft {
  animation: slideInLeft 0.6s ease-out forwards;
}

.animate-scaleIn {
  animation: scaleIn 0.5s ease-out forwards;
}

.reveal {
  opacity: 0;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  .parallax {
    transform: none !important;
  }
  
  .reveal {
    opacity: 1;
  }
}

@media (max-width: 1024px) {
  .strategies-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .performance-grid {
    grid-template-columns: 1fr;
  }
  
  .metrics-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .about-grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
  
  .about-image {
    order: -1;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    padding: var(--space-4);
    transform: translateY(-100%);
    transition: transform 0.3s ease;
    box-shadow: var(--shadow-lg);
    flex-direction: column;
    gap: var(--space-2);
  }
  
  .nav-menu.open {
    transform: translateY(0);
  }
  
  .nav-toggle {
    display: flex;
  }
  
  .hero {
    min-height: auto;
    padding: var(--space-16) 0;
  }
  
  .hero-title {
    font-size: var(--text-3xl);
  }
  
  .hero-actions {
    flex-direction: column;
  }
  
  .hero-stats {
    flex-direction: column;
    gap: var(--space-6);
  }
  
  .strategies-grid,
  .metrics-grid {
    grid-template-columns: 1fr;
  }
  
  .section {
    padding: var(--space-12) 0;
  }
  
  .section-title {
    font-size: var(--text-3xl);
  }
  
  .container {
    padding: 0 var(--space-4);
  }
  
  .footer-links {
    flex-direction: column;
    gap: var(--space-4);
    text-align: center;
  }
}

@media (max-width: 640px) {
  body {
    font-size: 15px;
  }
  
  .btn {
    width: 100%;
    justify-content: center;
  }
  
  .data-table {
    font-size: var(--text-xs);
  }
  
  .data-table th,
  .data-table td {
    padding: var(--space-3) var(--space-4);
  }
}