/* 
 * 客户案例页面样式
 */

/* ========================================
   页面标题区域
   ======================================== */

.page-header {
  padding: calc(60px + var(--spacing-xxl)) 0 var(--spacing-xxl);
  background: var(--color-background-light);
  position: relative;
  overflow: hidden;
}

.page-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
  opacity: 0.5;
}

.page-title {
  font-size: 48px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-sm);
}

.page-subtitle {
  font-size: 20px;
  color: var(--color-text-secondary);
}

/* ========================================
   筛选区域
   ======================================== */

.cases-filter-section {
  padding: var(--spacing-xl) 0;
  background: var(--color-background);
  border-bottom: 1px solid var(--color-border);
}

.filter-group {
  margin-bottom: var(--spacing-md);
}

.filter-group:last-child {
  margin-bottom: 0;
}

.filter-label {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-sm);
}

.filter-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.filter-btn {
  padding: 8px 20px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-secondary);
  background: var(--color-background-card);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  transition: all var(--transition-base);
}

.filter-btn:hover {
  color: var(--color-primary-light);
  border-color: var(--color-primary);
  box-shadow: 0 0 10px rgba(91, 110, 245, 0.3);
}

.filter-btn.active {
  color: white;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  border-color: var(--color-primary);
  box-shadow: var(--shadow-glow);
}

/* ========================================
   案例列表区域
   ======================================== */

.cases-list-section {
  background: var(--color-background);
}

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

/* ========================================
   案例卡片
   ======================================== */

.case-card {
  background: var(--color-background-card);
  border-radius: var(--border-radius-md);
  padding: var(--spacing-xl);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.case-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary);
}

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

.case-card::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  opacity: 0;
  transition: opacity var(--transition-base);
}

.case-card {
  position: relative;
}

/* 案例Logo */
.case-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 80px;
}

.case-logo-placeholder {
  width: 120px;
  height: 60px;
  background: var(--color-background-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text-secondary);
}

/* 案例内容 */
.case-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.case-title {
  font-size: 24px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-xs);
}

.case-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-xs);
}

.case-industry,
.case-product {
  padding: 4px 12px;
  font-size: 12px;
  font-weight: 500;
  border-radius: var(--border-radius-sm);
  background: var(--color-background-elevated);
  border: 1px solid var(--color-border);
}

.case-industry {
  color: var(--color-secondary);
  border-color: var(--color-secondary);
  background: rgba(0, 212, 255, 0.1);
}

.case-product {
  color: var(--color-primary-light);
  border-color: var(--color-primary);
  background: rgba(91, 110, 245, 0.1);
}

.case-description {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text-secondary);
  flex: 1;
}

/* 案例成果 */
.case-results {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--color-border);
}

.case-result-item {
  text-align: center;
}

.result-number {
  font-size: 28px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-xs);
}

.result-label {
  font-size: 13px;
  color: var(--color-text-light);
}

/* 案例详情切换按钮 */
.case-detail-toggle {
  margin-top: var(--spacing-sm);
  padding: 8px 20px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-primary-light);
  background: transparent;
  border: 1px solid var(--color-primary);
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  transition: all var(--transition-base);
  align-self: flex-start;
}

.case-detail-toggle:hover {
  background: var(--color-primary);
  color: white;
  box-shadow: 0 0 10px rgba(91, 110, 245, 0.3);
}

.case-detail-toggle.active {
  background: var(--color-primary);
  color: white;
}

/* 案例详情内容 */
.case-detail-content {
  display: none;
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-border);
  animation: slideDown 0.3s ease;
}

.case-detail-content.active {
  display: block;
}

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

.case-detail-section {
  margin-bottom: var(--spacing-lg);
}

.case-detail-section:last-child {
  margin-bottom: 0;
}

.case-detail-section h4 {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-sm);
  padding-left: var(--spacing-sm);
  border-left: 3px solid var(--color-primary);
}

.case-detail-section p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-sm);
}

.case-detail-section ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.case-detail-section ul li {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text-secondary);
  padding-left: var(--spacing-lg);
  margin-bottom: var(--spacing-xs);
  position: relative;
}

.case-detail-section ul li::before {
  content: '•';
  position: absolute;
  left: var(--spacing-sm);
  color: var(--color-primary);
  font-weight: bold;
}

.case-detail-section ul li strong {
  color: var(--color-primary-light);
  font-weight: 600;
}

/* ========================================
   空状态
   ======================================== */

.empty-state {
  text-align: center;
  padding: var(--spacing-xxl) 0;
  color: var(--color-text-light);
}

.empty-state svg {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--spacing-md);
  opacity: 0.5;
}

.empty-state p {
  font-size: 18px;
}

/* ========================================
   CTA区域
   ======================================== */

.cta-section {
  background: var(--color-background-light);
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
  opacity: 0.5;
}

.cta-content {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.cta-content h2 {
  font-size: 36px;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-md);
}

.cta-content p {
  font-size: 18px;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-xl);
}

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

/* ========================================
   响应式 - 平板
   ======================================== */

@media screen and (max-width: 1024px) {
  .cases-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
  
  .page-title {
    font-size: 36px;
  }
  
  .page-subtitle {
    font-size: 18px;
  }
}

/* ========================================
   响应式 - 移动端
   ======================================== */

@media screen and (max-width: 768px) {
  .page-header {
    padding: calc(60px + var(--spacing-xl)) 0 var(--spacing-xl);
  }
  
  .page-title {
    font-size: 28px;
  }
  
  .page-subtitle {
    font-size: 16px;
  }
  
  .cases-filter-section {
    padding: var(--spacing-md) 0;
  }
  
  .filter-label {
    font-size: 14px;
  }
  
  .filter-buttons {
    gap: var(--spacing-xs);
  }
  
  .filter-btn {
    padding: 6px 16px;
    font-size: 13px;
  }
  
  .cases-grid {
    gap: var(--spacing-md);
  }
  
  .case-card {
    padding: var(--spacing-lg);
    gap: var(--spacing-md);
  }
  
  .case-title {
    font-size: 20px;
  }
  
  .case-description {
    font-size: 14px;
  }
  
  .case-results {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-sm);
  }
  
  .result-number {
    font-size: 20px;
  }
  
  .result-label {
    font-size: 11px;
  }
  
  .cta-content h2 {
    font-size: 24px;
  }
  
  .cta-content p {
    font-size: 16px;
  }
  
  .cta-buttons {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
  
  .cta-buttons .btn {
    width: 100%;
  }
}