/* ========================================
   技术与架构页面样式 - 架构思维版本
   Architecture Thinking - Technology Page
   ======================================== */

/* Page Hero */
.page-hero {
  padding: calc(var(--header-height) + var(--space-16)) 0 var(--space-16);
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--color-border);
}

.page-hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-brand-primary), transparent);
  opacity: 0.5;
}

.page-hero .bg-grid {
  opacity: 0.5;
}

.page-hero-content {
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}

.page-hero .label {
  display: inline-block;
  margin-bottom: var(--space-4);
}

.page-hero h1 {
  font-size: var(--text-5xl);
  margin-bottom: var(--space-6);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.page-hero p {
  font-size: var(--text-xl);
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* Principles Section - 架构理念 */
.principles-section {
  padding: var(--space-32) 0;
}

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

.principle-card {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  transition: all var(--duration-base) var(--ease-engineering);
  position: relative;
}

.principle-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: var(--space-6);
  width: 40px;
  height: 2px;
  background: var(--gradient-accent);
  opacity: 0;
  transition: opacity var(--duration-base);
}

.principle-card:hover {
  border-color: var(--color-border-brand);
  transform: translateY(-4px);
}

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

.principle-icon {
  width: 48px;
  height: 48px;
  color: var(--color-brand-primary);
  margin-bottom: var(--space-6);
}

.principle-card h3 {
  font-size: var(--text-xl);
  margin-bottom: var(--space-4);
  font-weight: 600;
}

.principle-card > p {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
  line-height: 1.7;
}

.principle-points {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.principle-points li {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  padding-left: var(--space-5);
  position: relative;
}

.principle-points li::before {
  content: '›';
  position: absolute;
  left: 0;
  color: var(--color-brand-primary);
  font-weight: 600;
}

/* Layers Section - 系统分层 */
.layers-section {
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-32) 0;
  position: relative;
}

.layers-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-brand-primary), transparent);
  opacity: 0.3;
}

.section-subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-tertiary);
  margin-top: var(--space-4);
}

.layers-diagram {
  max-width: 800px;
  margin: 0 auto var(--space-12);
}

.layer-row {
  display: flex;
  align-items: stretch;
  gap: var(--space-4);
  margin-bottom: var(--space-2);
}

.layer-label {
  width: 140px;
  flex-shrink: 0;
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: var(--space-1);
}

.layer-num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-brand-primary);
}

.layer-name {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text-primary);
}

.layer-content {
  flex: 1;
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
}

.layer-desc {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
}

.layer-components {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.component {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  padding: var(--space-1) var(--space-3);
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

.component.tag-core {
  border-color: var(--color-brand-primary);
  color: var(--color-brand-primary);
}

.layer-arrow {
  width: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
}

.layer-notes {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.note-item {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-4);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.note-marker {
  color: var(--color-brand-primary);
  font-weight: 600;
}

.note-item p {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.note-item strong {
  color: var(--color-text-primary);
}

/* Modules Section - 模块关系 */
.modules-section {
  padding: var(--space-32) 0;
}

.modules-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  margin-bottom: var(--space-12);
}

.module-core,
.module-support,
.module-generic {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}

.module-core {
  border-top: 2px solid var(--color-brand-primary);
}

.module-support {
  border-top: 2px solid var(--color-brand-secondary);
}

.module-generic {
  border-top: 2px solid var(--color-text-muted);
}

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

.module-header h4 {
  font-size: var(--text-base);
  font-weight: 600;
}

.module-tag {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
}

.tag-core {
  background: rgba(59, 130, 246, 0.1);
  color: var(--color-brand-primary);
}

.tag-support {
  background: rgba(96, 165, 250, 0.1);
  color: var(--color-brand-secondary);
}

.tag-generic {
  background: rgba(115, 115, 115, 0.1);
  color: var(--color-text-tertiary);
}

.module-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.module-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.module-name {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-text-primary);
}

.module-desc {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
}

.module-interaction {
  max-width: 900px;
  margin: 0 auto;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
}

.module-interaction h4 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-6);
  font-weight: 600;
  text-align: center;
}

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

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

.interaction-num {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-brand-primary);
  font-weight: 600;
  flex-shrink: 0;
}

.interaction-item p {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.interaction-item strong {
  color: var(--color-text-primary);
}

/* Dataflow Section - 数据流向 */
.dataflow-section {
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-32) 0;
  position: relative;
}

.dataflow-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-brand-primary), transparent);
  opacity: 0.3;
}

.dataflow-diagram {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  margin-bottom: var(--space-12);
  flex-wrap: wrap;
}

.flow-stage {
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  text-align: center;
  min-width: 160px;
  transition: all var(--duration-base);
}

.flow-stage:hover {
  border-color: var(--color-border-brand);
}

.flow-icon {
  width: 48px;
  height: 48px;
  background: var(--color-brand-dim);
  border: 1px solid var(--color-border-brand);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  color: var(--color-brand-primary);
  margin: 0 auto var(--space-4);
}

.flow-stage h4 {
  font-size: var(--text-base);
  margin-bottom: var(--space-4);
  font-weight: 600;
}

.flow-stage ul {
  list-style: none;
  text-align: left;
}

.flow-stage li {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  padding: var(--space-1) 0;
  padding-left: var(--space-4);
  position: relative;
}

.flow-stage li::before {
  content: '·';
  position: absolute;
  left: 0;
  color: var(--color-brand-primary);
}

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

.dataflow-patterns {
  max-width: 900px;
  margin: 0 auto;
}

.dataflow-patterns h4 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-6);
  font-weight: 600;
  text-align: center;
}

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

.pattern-card {
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: all var(--duration-base);
}

.pattern-card:hover {
  border-color: var(--color-border-strong);
}

.pattern-card h5 {
  font-size: var(--text-base);
  margin-bottom: var(--space-3);
  font-weight: 600;
  color: var(--color-brand-primary);
}

.pattern-card p {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* Selection Section - 技术选型 */
.selection-section {
  padding: var(--space-32) 0;
}

.selection-principles {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
  margin-bottom: var(--space-12);
}

.selection-card {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  transition: all var(--duration-base);
  position: relative;
}

.selection-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: var(--space-6);
  width: 40px;
  height: 2px;
  background: var(--gradient-accent);
  opacity: 0;
  transition: opacity var(--duration-base);
}

.selection-card:hover {
  border-color: var(--color-border-brand);
}

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

.selection-icon {
  font-family: var(--font-mono);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-brand-primary);
  opacity: 0.3;
  margin-bottom: var(--space-4);
}

.selection-card h4 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-3);
  font-weight: 600;
}

.selection-card p {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.tech-examples {
  max-width: 900px;
  margin: 0 auto;
}

.tech-examples h4 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-6);
  font-weight: 600;
  text-align: center;
}

.examples-table {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.table-row {
  display: grid;
  grid-template-columns: 1.2fr 1.5fr 1fr 2fr;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid var(--color-border);
}

.table-row:last-child {
  border-bottom: none;
}

.table-header {
  background: var(--color-bg-tertiary);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.table-row span {
  font-size: var(--text-sm);
}

.col-scene {
  font-weight: 600;
  color: var(--color-text-primary);
}

.col-requirement,
.col-reason {
  color: var(--color-text-secondary);
}

.col-choice {
  font-family: var(--font-mono);
  color: var(--color-brand-primary);
}

/* CTA Section */
.cta-section {
  padding: var(--space-24) 0;
  text-align: center;
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
}

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

.cta-content h2 {
  font-size: var(--text-3xl);
  margin-bottom: var(--space-4);
  font-weight: 600;
}

.cta-content p {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-8);
}

.cta-buttons {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
}

/* Responsive */
@media (max-width: 1024px) {
  .principles-grid {
    grid-template-columns: 1fr;
  }
  
  .modules-grid {
    grid-template-columns: 1fr;
  }
  
  .interaction-grid {
    grid-template-columns: 1fr;
  }
  
  .dataflow-diagram {
    flex-direction: column;
  }
  
  .flow-arrow {
    transform: rotate(90deg);
  }
  
  .patterns-grid {
    grid-template-columns: 1fr;
  }
  
  .selection-principles {
    grid-template-columns: 1fr;
  }
  
  .table-row {
    grid-template-columns: 1fr;
    gap: var(--space-2);
  }
  
  .table-header {
    display: none;
  }
}

@media (max-width: 768px) {
  .page-hero h1 {
    font-size: var(--text-4xl);
  }
  
  .layer-row {
    flex-direction: column;
  }
  
  .layer-label {
    width: 100%;
    flex-direction: row;
    align-items: center;
  }
  
  .layer-arrow {
    transform: rotate(90deg);
    height: 24px;
  }
  
  .cta-buttons {
    flex-direction: column;
  }
}