/* ========================================
   AI Lab Channel Styles
   Purple gradient, tech feel, AI theme
   ======================================== */

/* AI Banner - Purple gradient theme */
.ai-banner {
  position: relative;
  padding: 160px 0 80px;
  background: linear-gradient(135deg, #0A1628 0%, #1a1040 40%, #2d1b69 70%, #1a1040 100%);
  color: var(--color-white);
  overflow: hidden;
}

.ai-banner::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%237C3AED' fill-opacity='0.04'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.6;
}

.ai-banner .container {
  position: relative;
  z-index: 1;
}

.ai-banner h1 {
  font-size: var(--font-size-5xl);
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
  line-height: 1.2;
}

.ai-banner h1 .ai-highlight {
  background: linear-gradient(135deg, #A78BFA, #7C3AED, #C084FC);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.ai-banner p {
  font-size: var(--font-size-lg);
  color: rgba(255,255,255,0.75);
  max-width: 700px;
  line-height: 1.8;
}

.ai-banner .banner-decoration {
  position: absolute;
  right: -50px;
  top: 50%;
  transform: translateY(-50%);
  width: 400px;
  height: 400px;
  opacity: 0.08;
}

/* AI Badge */
.ai-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: 6px 16px;
  background: linear-gradient(135deg, var(--color-ai), var(--color-ai-light));
  color: var(--color-white);
  border-radius: var(--border-radius-full);
  font-size: var(--font-size-sm);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
}

/* Scenario Quick Cards */
.scenario-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-2xl);
}

.scenario-card {
  background: var(--color-white);
  border-radius: var(--border-radius-xl);
  padding: var(--spacing-2xl);
  border: 1px solid var(--color-gray-200);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.scenario-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, #7C3AED, #A78BFA);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.scenario-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-ai);
}

.scenario-card:hover::before {
  opacity: 1;
}

.scenario-card-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--border-radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-lg);
  background: linear-gradient(135deg, rgba(124,58,237,0.15), rgba(124,58,237,0.05));
}

.scenario-card h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.scenario-card p {
  color: var(--color-gray-500);
  line-height: 1.7;
  margin-bottom: var(--spacing-lg);
}

.scenario-card .scenario-value {
  display: inline-flex;
  align-items: baseline;
  gap: 4px;
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--color-ai);
  line-height: 1;
}

.scenario-card .scenario-value-label {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
  font-weight: 400;
}

/* Chat Demo Area */
.chat-demo {
  background: var(--color-gray-50);
  border-radius: var(--border-radius-xl);
  padding: var(--spacing-3xl);
  margin: var(--spacing-3xl) 0;
}

.chat-demo-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-2xl);
}

.chat-demo-header .chat-demo-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--border-radius-lg);
  background: linear-gradient(135deg, #7C3AED, #A78BFA);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-weight: 700;
  font-size: var(--font-size-sm);
}

.chat-demo-header h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
}

.chat-demo-header p {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
}

.chat-window {
  background: var(--color-white);
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--color-gray-200);
  overflow: hidden;
  max-width: 800px;
  margin: 0 auto;
}

.chat-toolbar {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--color-gray-50);
  border-bottom: 1px solid var(--color-gray-200);
}

.chat-toolbar-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.chat-toolbar-dot:nth-child(1) { background: #EF4444; }
.chat-toolbar-dot:nth-child(2) { background: #F59E0B; }
.chat-toolbar-dot:nth-child(3) { background: #10B981; }

.chat-toolbar-title {
  margin-left: var(--spacing-sm);
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
  font-weight: 500;
}

.demo-chat-area {
  padding: var(--spacing-xl);
  min-height: 300px;
  max-height: 400px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.chat-message {
  display: flex;
  gap: var(--spacing-md);
  animation: chatFadeIn 0.4s ease;
}

@keyframes chatFadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.chat-message.user {
  justify-content: flex-end;
}

.chat-message.ai {
  justify-content: flex-start;
}

.chat-avatar {
  width: 36px;
  height: 36px;
  border-radius: var(--border-radius-md);
  background: linear-gradient(135deg, #7C3AED, #A78BFA);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-weight: 700;
  font-size: var(--font-size-xs);
  flex-shrink: 0;
}

.chat-bubble {
  max-width: 70%;
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--border-radius-lg);
  font-size: var(--font-size-sm);
  line-height: 1.7;
}

.chat-message.user .chat-bubble {
  background: linear-gradient(135deg, #7C3AED, #6D28D9);
  color: var(--color-white);
  border-bottom-right-radius: 4px;
}

.chat-message.ai .chat-bubble {
  background: var(--color-gray-50);
  color: var(--color-gray-800);
  border: 1px solid var(--color-gray-200);
  border-bottom-left-radius: 4px;
}

/* Typing indicator */
.typing-indicator {
  display: inline-flex;
  gap: 4px;
  align-items: center;
  padding: 4px 0;
}

.typing-indicator::before,
.typing-indicator::after,
.typing-indicator span {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-ai);
  opacity: 0.4;
  animation: typingBounce 1.4s infinite ease-in-out;
}

.typing-indicator::before { animation-delay: 0s; }
.typing-indicator span { animation-delay: 0.2s; }
.typing-indicator::after { animation-delay: 0.4s; }

@keyframes typingBounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
  30% { transform: translateY(-6px); opacity: 1; }
}

/* Preset question buttons */
.chat-presets {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  padding: var(--spacing-lg);
  border-top: 1px solid var(--color-gray-200);
  background: var(--color-gray-50);
}

.chat-preset-btn {
  padding: 8px 16px;
  border-radius: var(--border-radius-full);
  font-size: var(--font-size-sm);
  color: var(--color-ai);
  background: rgba(124,58,237,0.08);
  border: 1px solid rgba(124,58,237,0.2);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.chat-preset-btn:hover {
  background: rgba(124,58,237,0.15);
  border-color: var(--color-ai);
  transform: translateY(-1px);
}

/* Model Architecture Display */
.model-arch {
  background: var(--color-gray-50);
  border-radius: var(--border-radius-xl);
  padding: var(--spacing-3xl);
  margin: var(--spacing-2xl) 0;
}

.model-arch h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-2xl);
  text-align: center;
}

.arch-layers {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  max-width: 800px;
  margin: 0 auto;
}

.arch-layer {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  padding: var(--spacing-lg) var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  transition: all var(--transition-base);
}

.arch-layer:hover {
  border-color: var(--color-ai);
  box-shadow: 0 4px 12px rgba(124,58,237,0.1);
}

.arch-layer-num {
  width: 40px;
  height: 40px;
  border-radius: var(--border-radius-md);
  background: linear-gradient(135deg, #7C3AED, #A78BFA);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: var(--font-size-lg);
  flex-shrink: 0;
}

.arch-layer-content {
  flex: 1;
}

.arch-layer-content h4 {
  font-size: var(--font-size-base);
  font-weight: 600;
  margin-bottom: 4px;
}

.arch-layer-content p {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
  line-height: 1.6;
}

.arch-layer-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  flex-shrink: 0;
}

.arch-layer-tag {
  padding: 4px 12px;
  border-radius: var(--border-radius-full);
  font-size: var(--font-size-xs);
  font-weight: 500;
  background: rgba(124,58,237,0.08);
  color: var(--color-ai);
}

/* Comparison Table */
.compare-table-wrap {
  overflow-x: auto;
  margin: var(--spacing-2xl) 0;
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--color-gray-200);
}

.compare-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-sm);
}

.compare-table thead {
  background: linear-gradient(135deg, #1a1040, #2d1b69);
  color: var(--color-white);
}

.compare-table th {
  padding: var(--spacing-md) var(--spacing-lg);
  text-align: left;
  font-weight: 600;
  white-space: nowrap;
}

.compare-table td {
  padding: var(--spacing-md) var(--spacing-lg);
  border-bottom: 1px solid var(--color-gray-100);
  line-height: 1.6;
}

.compare-table tbody tr:hover {
  background: rgba(124,58,237,0.03);
}

.compare-table .col-highlight {
  background: rgba(124,58,237,0.04);
  font-weight: 500;
}

.compare-table .check {
  color: #10B981;
  font-weight: 600;
}

.compare-table .cross {
  color: #EF4444;
  font-weight: 600;
}

/* Training Data Cards */
.training-data-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-lg);
}

.training-data-card {
  background: var(--color-white);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
  border: 1px solid var(--color-gray-200);
  text-align: center;
  transition: all var(--transition-base);
}

.training-data-card:hover {
  border-color: var(--color-ai);
  box-shadow: 0 4px 12px rgba(124,58,237,0.1);
  transform: translateY(-2px);
}

.training-data-card .td-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--border-radius-md);
  background: linear-gradient(135deg, rgba(124,58,237,0.15), rgba(124,58,237,0.05));
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--spacing-md);
  color: var(--color-ai);
}

.training-data-card h4 {
  font-size: var(--font-size-base);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.training-data-card p {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
  line-height: 1.6;
}

/* Security & Compliance */
.security-section {
  background: linear-gradient(135deg, rgba(124,58,237,0.06), rgba(0,212,170,0.04));
  border: 1px solid rgba(124,58,237,0.15);
  border-radius: var(--border-radius-xl);
  padding: var(--spacing-2xl);
  margin: var(--spacing-2xl) 0;
}

.security-items {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.security-item {
  display: flex;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  background: var(--color-white);
  border-radius: var(--border-radius-md);
  border: 1px solid rgba(124,58,237,0.1);
}

.security-item .sec-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--border-radius-md);
  background: linear-gradient(135deg, #7C3AED, #A78BFA);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--color-white);
}

.security-item h4 {
  font-size: var(--font-size-base);
  font-weight: 600;
  margin-bottom: 4px;
}

.security-item p {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
  line-height: 1.6;
}

/* Application Scenario Detail */
.app-scenario {
  background: var(--color-white);
  border-radius: var(--border-radius-xl);
  border: 1px solid var(--color-gray-200);
  padding: var(--spacing-3xl);
  margin-bottom: var(--spacing-2xl);
  transition: all var(--transition-base);
}

.app-scenario:hover {
  border-color: var(--color-ai);
  box-shadow: 0 4px 20px rgba(124,58,237,0.08);
}

.app-scenario-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-2xl);
}

.app-scenario-num {
  width: 56px;
  height: 56px;
  border-radius: var(--border-radius-lg);
  background: linear-gradient(135deg, #7C3AED, #A78BFA);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-2xl);
  font-weight: 700;
  flex-shrink: 0;
}

.app-scenario-header h3 {
  font-size: var(--font-size-2xl);
  font-weight: 600;
}

.app-scenario-header p {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
  margin-top: 4px;
}

.app-flow {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  gap: var(--spacing-lg);
  align-items: center;
  margin: var(--spacing-xl) 0;
}

.app-flow-block {
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  text-align: center;
}

.app-flow-block.input {
  background: rgba(0,212,170,0.06);
  border: 1px solid rgba(0,212,170,0.2);
}

.app-flow-block.process {
  background: rgba(124,58,237,0.06);
  border: 1px solid rgba(124,58,237,0.2);
}

.app-flow-block.output {
  background: rgba(255,107,53,0.06);
  border: 1px solid rgba(255,107,53,0.2);
}

.app-flow-block h4 {
  font-size: var(--font-size-sm);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--color-gray-600);
}

.app-flow-block ul {
  text-align: left;
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
  line-height: 1.8;
}

.app-flow-arrow {
  color: var(--color-gray-400);
  font-size: var(--font-size-2xl);
}

.app-effect {
  display: flex;
  gap: var(--spacing-xl);
  margin-top: var(--spacing-xl);
  padding: var(--spacing-xl);
  background: var(--color-gray-50);
  border-radius: var(--border-radius-lg);
}

.app-effect-item {
  flex: 1;
  text-align: center;
}

.app-effect-item .effect-value {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--color-ai);
  line-height: 1;
  margin-bottom: var(--spacing-sm);
}

.app-effect-item .effect-label {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
}

.app-effect-item .effect-change {
  font-size: var(--font-size-xs);
  color: #10B981;
  font-weight: 600;
  margin-top: 4px;
}

/* Case Cards */
.case-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-xl);
}

.case-card {
  background: var(--color-white);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-2xl);
  border: 1px solid var(--color-gray-200);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.case-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, #7C3AED, #A78BFA);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.case-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-ai);
}

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

.case-card .case-industry {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(124,58,237,0.08);
  color: var(--color-ai);
  border-radius: var(--border-radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
}

.case-card h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  line-height: 1.4;
}

.case-card .case-desc {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
  line-height: 1.7;
  margin-bottom: var(--spacing-lg);
}

.case-card .case-result {
  display: flex;
  align-items: baseline;
  gap: var(--spacing-sm);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--color-gray-100);
}

.case-card .case-result-value {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-ai);
  line-height: 1;
}

.case-card .case-result-label {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
}

/* Demo Page - Trial Form */
.trial-form-section {
  background: var(--color-gray-50);
  border-radius: var(--border-radius-xl);
  padding: var(--spacing-3xl);
  margin: var(--spacing-3xl) 0;
}

.trial-form {
  max-width: 600px;
  margin: 0 auto;
}

.trial-form h3 {
  font-size: var(--font-size-2xl);
  font-weight: 600;
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.trial-form .form-group select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L6 6L11 1' stroke='%2394A3B8' stroke-width='1.5' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 40px;
}

/* AI Section Dark Theme */
.ai-section-dark {
  background: linear-gradient(135deg, #0A1628 0%, #1a1040 50%, #2d1b69 100%);
  color: var(--color-white);
}

.ai-section-dark .section-header p {
  color: var(--color-gray-400);
}

/* AI CTA */
.ai-cta {
  background: linear-gradient(135deg, #1a1040, #2d1b69);
  padding: var(--spacing-3xl) 0;
  text-align: center;
  color: var(--color-white);
}

.ai-cta h2 {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
}

.ai-cta p {
  color: var(--color-gray-400);
  margin-bottom: var(--spacing-xl);
  font-size: var(--font-size-lg);
}

/* Sub Navigation */
.ai-subnav {
  background: var(--color-white);
  border-bottom: 1px solid var(--color-gray-200);
  position: sticky;
  top: 80px;
  z-index: var(--z-sticky);
}

.ai-subnav .container {
  display: flex;
  gap: var(--spacing-lg);
  overflow-x: auto;
  padding-top: 0;
  padding-bottom: 0;
}

.ai-subnav a {
  display: inline-block;
  padding: var(--spacing-md) var(--spacing-sm);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-gray-500);
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  transition: all var(--transition-fast);
}

.ai-subnav a:hover,
.ai-subnav a.active {
  color: var(--color-ai);
  border-bottom-color: var(--color-ai);
}

/* Responsive */
@media (max-width: 1024px) {
  .scenario-cards {
    grid-template-columns: repeat(2, 1fr);
  }
  .training-data-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .security-items {
    grid-template-columns: 1fr;
  }
  .app-flow {
    grid-template-columns: 1fr;
  }
  .app-flow-arrow {
    transform: rotate(90deg);
    text-align: center;
  }
  .case-grid {
    grid-template-columns: 1fr;
  }
  .app-effect {
    flex-wrap: wrap;
  }
}

@media (max-width: 768px) {
  .ai-banner {
    padding: 130px 0 60px;
  }
  .ai-banner h1 {
    font-size: var(--font-size-3xl);
  }
  .scenario-cards {
    grid-template-columns: 1fr;
  }
  .training-data-grid {
    grid-template-columns: 1fr;
  }
  .chat-demo {
    padding: var(--spacing-xl);
  }
  .chat-bubble {
    max-width: 85%;
  }
  .chat-presets {
    flex-direction: column;
  }
  .chat-preset-btn {
    text-align: center;
  }
  .model-arch {
    padding: var(--spacing-xl);
  }
  .arch-layer {
    flex-direction: column;
    text-align: center;
  }
  .arch-layer-tags {
    justify-content: center;
  }
  .app-scenario {
    padding: var(--spacing-xl);
  }
  .app-scenario-header {
    flex-direction: column;
    text-align: center;
  }
  .app-effect {
    flex-direction: column;
  }
  .trial-form-section {
    padding: var(--spacing-xl);
  }
  .ai-banner .banner-decoration {
    display: none;
  }
}

@media (max-width: 480px) {
  .ai-banner h1 {
    font-size: var(--font-size-2xl);
  }
  .compare-table {
    font-size: var(--font-size-xs);
  }
  .compare-table th,
  .compare-table td {
    padding: var(--spacing-sm) var(--spacing-md);
  }
}