/* ========================================
   关于我们页面样式 - 工程美学版本
   Engineering Aesthetics - About 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;
}

/* DNA Section - 团队基因 */
.dna-section {
  padding: var(--space-32) 0;
  position: relative;
}

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

.dna-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;
}

.dna-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);
}

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

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

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

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

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

/* Engineering Section - 工程背景 */
.engineering-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;
}

.engineering-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;
}

.engineering-intro {
  max-width: 800px;
  margin: 0 auto var(--space-12);
  text-align: center;
}

.engineering-intro p {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  line-height: 1.8;
}

.engineering-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
  max-width: 900px;
  margin: 0 auto;
}

.engineering-item {
  display: flex;
  gap: var(--space-6);
  padding: var(--space-6);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--duration-base);
}

.engineering-item:hover {
  border-color: var(--color-border-brand);
}

.engineering-num {
  font-family: var(--font-mono);
  font-size: var(--text-2xl);
  font-weight: 600;
  color: var(--color-brand-primary);
  opacity: 0.5;
  line-height: 1;
}

.engineering-text h4 {
  font-size: var(--text-base);
  margin-bottom: var(--space-2);
  font-weight: 600;
}

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

/* Not For Section - 不适合哪些客户 */
.notfor-section {
  padding: var(--space-32) 0;
}

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

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

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

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

.notfor-marker {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  width: 32px;
  height: 32px;
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-base);
  color: var(--color-text-muted);
}

.notfor-card h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-4);
  font-weight: 600;
  padding-right: var(--space-8);
}

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

.notfor-conclusion {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
  padding: var(--space-8);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.notfor-conclusion p {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* Team Section */
.team-section {
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  padding: var(--space-32) 0;
  position: relative;
}

.team-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;
}

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

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

.team-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 40px;
  height: 2px;
  background: var(--gradient-accent);
  opacity: 0;
  transition: opacity var(--duration-base);
}

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

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

.team-avatar {
  width: 100px;
  height: 100px;
  margin: 0 auto var(--space-6);
  border-radius: 50%;
  background: var(--color-bg-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
}

.team-avatar svg {
  width: 60px;
  height: 60px;
}

.team-card h4 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-1);
  font-weight: 600;
}

.team-role {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-brand-primary);
  margin-bottom: var(--space-4);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.team-bio {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  line-height: 1.6;
}

/* CTA Section */
.cta-section {
  padding: var(--space-24) 0;
  text-align: center;
}

.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) {
  .dna-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .engineering-grid {
    grid-template-columns: 1fr;
  }
  
  .notfor-grid {
    grid-template-columns: 1fr;
  }
  
  .team-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .page-hero h1 {
    font-size: var(--text-4xl);
  }
  
  .dna-grid {
    grid-template-columns: 1fr;
  }
  
  .engineering-item {
    flex-direction: column;
    gap: var(--space-4);
  }
  
  .team-grid {
    grid-template-columns: 1fr;
  }
  
  .cta-buttons {
    flex-direction: column;
  }
}