.page-hero {
  padding-top: 68px;
  padding-bottom: 48px;
  background: linear-gradient(160deg, #0f172a 0%, #1e293b 40%, #0f172a 100%);
  color: var(--color-text-light);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 500px 300px at 30% 40%, rgba(26, 115, 232, 0.2), transparent),
    radial-gradient(ellipse 400px 400px at 70% 60%, rgba(108, 99, 255, 0.15), transparent);
  pointer-events: none;
}

.page-hero-content {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  padding: 60px var(--container-padding) 40px;
}

.breadcrumb {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  margin-bottom: 24px;
}

.breadcrumb a { color: rgba(255, 255, 255, 0.5); transition: color var(--transition-fast); }
.breadcrumb a:hover { color: rgba(255, 255, 255, 0.9); }
.breadcrumb .sep { color: rgba(255, 255, 255, 0.3); }
.breadcrumb .current { color: rgba(255, 255, 255, 0.9); }

.page-hero h1 { font-size: 2.5rem; color: #ffffff; margin-bottom: 16px; }
.page-hero p { font-size: 1.125rem; color: rgba(255, 255, 255, 0.7); margin-bottom: 0; }

.ai-stats-section { padding: 80px 0; background: var(--color-bg); }
.ai-stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }

.ai-stat-card {
  padding: 32px 24px;
  background: var(--color-card);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.ai-stat-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), #6c63ff);
}

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

.stat-icon {
  width: 64px; height: 64px; border-radius: 50%;
  background: var(--color-primary-light);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.75rem; margin: 0 auto 16px;
}

.stat-value { font-size: 2rem; font-weight: 800; color: var(--color-text); margin-bottom: 4px; letter-spacing: -0.02em; }
.stat-label { font-size: 0.9375rem; color: var(--color-text-secondary); margin-bottom: 12px; }
.stat-trend { display: inline-block; padding: 4px 12px; background: #f0fdf4; color: var(--color-secondary); border-radius: 100px; font-size: 0.75rem; font-weight: 600; }

.ai-modules-section { padding: 80px 0; background: var(--color-bg-alt); }
.ai-modules-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }

.ai-module-card {
  padding: 32px 28px;
  background: var(--color-card);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.ai-module-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--color-primary-light); }

.ai-module-icon {
  width: 72px; height: 72px; border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--color-primary-light), #f3e8fd);
  display: flex; align-items: center; justify-content: center;
  font-size: 2rem; margin-bottom: 20px;
}

.ai-module-card h3 { font-size: 1.375rem; margin-bottom: 12px; }
.ai-module-card > p { font-size: 0.9375rem; color: var(--color-text-secondary); line-height: 1.7; margin-bottom: 20px; }

.ai-module-features { display: flex; flex-direction: column; gap: 10px; }

.ai-module-features li {
  font-size: 0.875rem; color: var(--color-text);
  padding-left: 24px; position: relative; line-height: 1.5;
}

.ai-module-features li::before {
  content: '✓'; position: absolute; left: 0; top: 0;
  width: 18px; height: 18px;
  background: var(--color-primary-light); color: var(--color-primary);
  border-radius: 50%; font-size: 0.6875rem; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
}

.ai-chat-section { padding: 80px 0; background: var(--color-bg); }

.ai-chat-preview {
  max-width: 760px; margin: 0 auto;
  background: var(--color-card);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.chat-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 20px;
  background: linear-gradient(135deg, #f8fafc, #f1f5f9);
  border-bottom: 1px solid var(--color-border-light);
}

.chat-header-info { display: flex; align-items: center; gap: 12px; }

.chat-avatar {
  width: 40px; height: 40px; border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), #6c63ff);
  display: flex; align-items: center; justify-content: center; font-size: 1.25rem;
}

.chat-title h4 { font-size: 0.9375rem; margin-bottom: 2px; }
.chat-status { font-size: 0.75rem; color: var(--color-text-secondary); display: inline-flex; align-items: center; gap: 6px; }
.status-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--color-primary); display: inline-block; }
.status-dot.green { background: var(--color-secondary); box-shadow: 0 0 0 3px rgba(52, 168, 83, 0.2); }
.chat-model-badge { padding: 4px 12px; background: var(--color-primary-light); color: var(--color-primary); border-radius: 100px; font-size: 0.75rem; font-weight: 600; }

.chat-body { padding: 24px; display: flex; flex-direction: column; gap: 16px; background: #fafbfc; min-height: 380px; }
.chat-message { display: flex; width: 100%; }
.chat-message.user { justify-content: flex-end; }
.chat-message.ai { justify-content: flex-start; }

.message-bubble {
  max-width: 82%; padding: 14px 18px;
  border-radius: var(--radius-lg);
  font-size: 0.9375rem; line-height: 1.6; word-break: break-word;
}

.chat-message.user .message-bubble {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: var(--color-text-light); border-bottom-right-radius: var(--radius-sm);
}

.chat-message.ai .message-bubble {
  background: var(--color-card); border: 1px solid var(--color-border-light);
  color: var(--color-text); border-bottom-left-radius: var(--radius-sm); box-shadow: var(--shadow-sm);
}

.chat-message.ai .message-bubble p { margin-bottom: 10px; font-weight: 500; }
.chat-message.ai .message-bubble p:last-child { margin-bottom: 0; }

.ai-reasoning {
  padding: 10px 14px; background: #f8fafc; border-radius: var(--radius-sm);
  margin-bottom: 12px; border-left: 3px solid var(--color-primary);
  display: flex; flex-direction: column; gap: 4px;
}

.reasoning-label { font-size: 0.6875rem; font-weight: 700; color: var(--color-primary); text-transform: uppercase; letter-spacing: 0.5px; }
.reasoning-text { font-size: 0.8125rem; color: var(--color-text-secondary); line-height: 1.5; }

.ai-steps { padding-left: 20px; margin-bottom: 12px; display: flex; flex-direction: column; gap: 6px; }
.ai-steps li { font-size: 0.875rem; color: var(--color-text); line-height: 1.5; }
.ai-steps code { padding: 1px 6px; background: #f1f5f9; border-radius: 4px; font-family: var(--font-mono); font-size: 0.8125rem; color: var(--color-primary); }

.ai-code-block { background: #1e293b; border-radius: var(--radius-md); margin-bottom: 12px; overflow: hidden; }

.code-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 8px 14px; background: #0f172a;
  color: rgba(255, 255, 255, 0.8); font-size: 0.75rem; font-weight: 600;
}

.code-copy {
  padding: 2px 10px; background: rgba(255, 255, 255, 0.1); color: rgba(255, 255, 255, 0.9);
  border-radius: var(--radius-sm); font-size: 0.6875rem; cursor: pointer; transition: background var(--transition-fast);
}

.code-copy:hover { background: rgba(255, 255, 255, 0.2); }

.ai-code-block pre {
  padding: 14px; margin: 0; color: #e2e8f0;
  font-family: var(--font-mono); font-size: 0.8125rem; line-height: 1.6; overflow-x: auto;
}

.ai-actions { display: flex; gap: 10px; flex-wrap: wrap; }

.ai-action-btn {
  padding: 8px 16px; border-radius: var(--radius-md); font-size: 0.8125rem; font-weight: 600;
  background: var(--color-bg-alt); color: var(--color-text); transition: all var(--transition-fast); cursor: pointer;
}

.ai-action-btn:hover { background: var(--color-border-light); }
.ai-action-btn.primary { background: var(--color-primary); color: var(--color-text-light); }
.ai-action-btn.primary:hover { background: var(--color-primary-dark); }

.ai-findings { display: flex; flex-direction: column; gap: 8px; margin-bottom: 12px; }

.finding-item {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 12px; border-radius: var(--radius-sm); font-size: 0.8125rem; font-weight: 500;
}

.finding-item.high { background: #fef2f2; color: #dc2626; }
.finding-item.medium { background: #fef3c7; color: #b45309; }
.finding-item.low { background: var(--color-primary-light); color: var(--color-primary); }
.finding-icon { font-size: 1rem; }

.chat-input-area { padding: 16px 20px; background: var(--color-card); border-top: 1px solid var(--color-border-light); }

.chat-input-placeholder {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 16px; background: var(--color-bg-alt);
  border-radius: var(--radius-md); font-size: 0.875rem; color: var(--color-text-secondary);
}

.typing-indicator { display: inline-flex; align-items: center; gap: 4px; }

.typing-indicator span {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--color-primary);
  animation: typing 1.4s infinite ease-in-out both;
}

.typing-indicator span:nth-child(1) { animation-delay: -0.32s; }
.typing-indicator span:nth-child(2) { animation-delay: -0.16s; }

@keyframes typing {
  0%, 80%, 100% { transform: scale(0.6); opacity: 0.4; }
  40% { transform: scale(1); opacity: 1; }
}

.ai-model-section { padding: 80px 0; background: var(--color-bg-alt); }
.ai-model-selector { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }

.model-card {
  padding: 32px 28px;
  background: var(--color-card);
  border: 2px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: all var(--transition-base);
  position: relative;
}

.model-card:hover { border-color: var(--color-primary); transform: translateY(-4px); box-shadow: var(--shadow-md); }
.model-card.recommended { border-color: var(--color-primary); background: linear-gradient(180deg, var(--color-primary-light) 0%, var(--color-card) 100%); }

.model-badge {
  position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
  padding: 4px 14px; background: var(--color-primary); color: var(--color-text-light);
  border-radius: 100px; font-size: 0.75rem; font-weight: 700; white-space: nowrap;
}

.model-icon {
  width: 72px; height: 72px; border-radius: 50%;
  background: var(--color-primary-light);
  display: flex; align-items: center; justify-content: center;
  font-size: 2rem; margin: 0 auto 16px;
}

.model-card.recommended .model-icon { background: linear-gradient(135deg, var(--color-primary), #6c63ff); }
.model-card h4 { font-size: 1.25rem; margin-bottom: 8px; }
.model-card > p { font-size: 0.875rem; color: var(--color-text-secondary); line-height: 1.6; margin-bottom: 20px; }

.model-features { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin-bottom: 20px; }

.model-features span {
  padding: 4px 12px; background: var(--color-bg-alt); border-radius: 100px;
  font-size: 0.75rem; font-weight: 600; color: var(--color-text-secondary);
}

.model-card.recommended .model-features span { background: var(--color-text-light); color: var(--color-primary); }
.model-status { display: inline-flex; align-items: center; gap: 6px; font-size: 0.8125rem; color: var(--color-text-secondary); font-weight: 500; }

.ai-scenarios-section { padding: 80px 0; background: var(--color-bg); }
.ai-scenarios { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }

.scenario-card {
  padding: 32px 28px;
  background: var(--color-card);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
  position: relative;
}

.scenario-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--color-primary-light); }
.scenario-card.featured { border-color: var(--color-primary); background: linear-gradient(180deg, var(--color-primary-light) 0%, var(--color-card) 100%); }

.scenario-icon {
  width: 72px; height: 72px; border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--color-primary-light), #f3e8fd);
  display: flex; align-items: center; justify-content: center;
  font-size: 2rem; margin-bottom: 16px;
}

.scenario-tag { display: inline-block; padding: 4px 12px; background: var(--color-primary-light); color: var(--color-primary); border-radius: 100px; font-size: 0.75rem; font-weight: 600; margin-bottom: 12px; }
.scenario-card h3 { font-size: 1.375rem; margin-bottom: 12px; }
.scenario-card > p { font-size: 0.9375rem; color: var(--color-text-secondary); line-height: 1.7; margin-bottom: 20px; }

.scenario-list { display: flex; flex-direction: column; gap: 10px; }

.scenario-list li { font-size: 0.875rem; color: var(--color-text); padding-left: 24px; position: relative; line-height: 1.5; }

.scenario-list li::before {
  content: '✓'; position: absolute; left: 0; top: 0;
  width: 18px; height: 18px;
  background: var(--color-primary-light); color: var(--color-primary);
  border-radius: 50%; font-size: 0.6875rem; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
}

.ai-cta {
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  color: var(--color-text-light);
  padding: 72px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.ai-cta::before {
  content: '';
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 600px 300px at 20% 50%, rgba(26, 115, 232, 0.15), transparent),
    radial-gradient(ellipse 400px 400px at 80% 50%, rgba(108, 99, 255, 0.1), transparent);
  pointer-events: none;
}

.ai-cta .container { position: relative; }
.ai-cta h2 { color: var(--color-text-light); font-size: 2rem; margin-bottom: 12px; }
.ai-cta p { color: rgba(255, 255, 255, 0.7); font-size: 1.0625rem; margin-bottom: 32px; }
.ai-cta .btn { margin: 0 8px; }

.section-header { text-align: center; margin-bottom: 48px; }
.section-header .subtitle { display: inline-block; font-size: 0.875rem; font-weight: 600; color: var(--color-primary); text-transform: uppercase; letter-spacing: 1.5px; margin-bottom: 12px; }
.section-header h2 { font-size: 2rem; margin-bottom: 12px; }
.section-header p { font-size: 1rem; color: var(--color-text-secondary); max-width: 640px; margin: 0 auto; }

.footer-column a.active { color: var(--color-text-light); font-weight: 600; }

@media (max-width: 1100px) {
  .ai-stats-grid { grid-template-columns: repeat(2, 1fr); }
  .ai-modules-grid { grid-template-columns: repeat(2, 1fr); }
  .ai-model-selector { grid-template-columns: 1fr; max-width: 420px; margin: 0 auto; }
  .ai-scenarios { grid-template-columns: 1fr; max-width: 420px; margin: 0 auto; }
}

@media (max-width: 960px) {
  .ai-stats-section,
  .ai-modules-section,
  .ai-chat-section,
  .ai-model-section,
  .ai-scenarios-section { padding: 56px 0; }

  .ai-stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .ai-stat-card { padding: 24px 16px; }
  .stat-value { font-size: 1.5rem; }
  .ai-modules-grid { grid-template-columns: 1fr; }
  .ai-cta .btn { display: block; margin: 8px auto; width: 100%; max-width: 280px; }
  .message-bubble { max-width: 90%; }
  .ai-actions { flex-direction: column; }
  .ai-action-btn { width: 100%; text-align: center; }
}

@media (max-width: 560px) {
  .page-hero h1 { font-size: 1.75rem; }
  .section-header h2 { font-size: 1.5rem; }
  .ai-stats-grid { grid-template-columns: 1fr; }
  .ai-modules-grid { grid-template-columns: 1fr; }
  .ai-chat-preview { border-radius: var(--radius-lg); }
  .chat-body { padding: 16px; min-height: 320px; }
  .message-bubble { max-width: 92%; font-size: 0.875rem; }

  .ai-stats-section,
  .ai-modules-section,
  .ai-chat-section,
  .ai-model-section,
  .ai-scenarios-section { padding: 40px 0; }

  .model-card { padding: 28px 20px; }
  .scenario-card { padding: 28px 20px; }
}