/* ========================================
   成功案例页面样式 - 工程美学版本
   Engineering Aesthetics - Cases 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;
}

/* Filter Tabs - 工程化筛选标签 */
.filter-tabs {
  display: flex;
  gap: var(--space-2);
  margin-bottom: var(--space-10);
  flex-wrap: wrap;
  justify-content: center;
  padding: var(--space-4);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.filter-tab {
  padding: var(--space-2) var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--duration-base);
}

.filter-tab:hover {
  color: var(--color-text-secondary);
  background: var(--color-bg-tertiary);
}

.filter-tab.active {
  color: var(--color-brand-primary);
  border-color: var(--color-border-brand);
  background: var(--color-brand-dim);
}

/* Cases Section */
.cases-section {
  padding: var(--space-16) 0 var(--space-32);
}

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

/* Case Card - 工程化案例卡片 */
.case-card {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--duration-base) var(--ease-engineering);
  position: relative;
}

.case-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);
  z-index: 2;
}

.case-card:hover {
  border-color: var(--color-border-brand);
  transform: translateY(-4px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

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

.case-image {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--color-bg-tertiary);
  position: relative;
}

.case-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, transparent 50%, rgba(0,0,0,0.5));
}

.case-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.case-placeholder svg {
  width: 100%;
  height: 100%;
}

.case-content {
  padding: var(--space-6);
}

.case-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--space-4);
}

.case-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-brand-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: var(--space-1) var(--space-3);
  background: var(--color-brand-dim);
  border-radius: var(--radius-sm);
}

.case-year {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.case-card h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-3);
  font-weight: 600;
  line-height: 1.4;
}

.case-client {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-4);
}

.case-description {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
  line-height: 1.6;
}

/* Case Stats - 案例统计 */
.case-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
  padding: var(--space-4) 0;
  border-top: 1px solid var(--color-border);
  margin-bottom: var(--space-4);
}

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

.case-stat-value {
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-brand-primary);
  display: block;
}

.case-stat-label {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Tech Stack - 技术栈标签 */
.case-tech {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.tech-tag {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  padding: var(--space-1) var(--space-2);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

.case-link {
  font-size: var(--text-sm);
  color: var(--color-brand-primary);
  transition: color var(--duration-fast);
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
}

.case-link::after {
  content: '→';
  transition: transform var(--duration-base);
}

.case-link:hover {
  color: var(--color-brand-secondary);
}

.case-link:hover::after {
  transform: translateX(4px);
}

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

.testimonial-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;
}

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

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

.testimonial-card::before {
  content: '"';
  position: absolute;
  top: var(--space-4);
  left: var(--space-6);
  font-size: 48px;
  color: var(--color-brand-primary);
  opacity: 0.3;
  font-family: Georgia, serif;
  line-height: 1;
}

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

.testimonial-text {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-6);
  position: relative;
  z-index: 1;
}

.testimonial-quote {
  width: 32px;
  height: 32px;
  color: var(--color-brand-primary);
  opacity: 0.4;
  margin-bottom: var(--space-4);
}

.testimonial-quote svg {
  width: 100%;
  height: 100%;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.author-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-bg-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  color: var(--color-brand-primary);
}

.author-info h4 {
  font-size: var(--text-sm);
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.author-info p {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
}

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

/* Navigation CTA */
.nav-cta {
  margin-left: var(--space-4);
  padding: var(--space-2) var(--space-4);
  background: var(--color-brand-primary);
  color: white !important;
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 500;
  text-decoration: none;
  transition: all 0.3s ease;
}

.nav-cta:hover {
  background: var(--color-brand-secondary);
  transform: translateY(-2px);
}

/* Pulse animation for CTA */
.btn-pulse {
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(59, 130, 246, 0.4); }
  50% { box-shadow: 0 0 0 10px rgba(59, 130, 246, 0); }
}

.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) {
  .cases-grid {
    grid-template-columns: 1fr;
  }
  
  .testimonial-grid {
    grid-template-columns: 1fr;
  }
  
  .case-stats {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  .page-hero h1 {
    font-size: var(--text-4xl);
  }
  
  .filter-tabs {
    justify-content: flex-start;
    overflow-x: auto;
    flex-wrap: nowrap;
    -webkit-overflow-scrolling: touch;
  }
  
  .case-stats {
    grid-template-columns: 1fr;
    gap: var(--space-2);
  }
  
  .cta-buttons {
    flex-direction: column;
  }
}