/*
   高科电力企业官网 - 客户案例详情页专属样式
   包含：页面过渡、返回按钮、客户信息、案例内容、图库灯箱、相关案例
   ======================================== */

/* ==================== 页面过渡动画 ==================== */
.page-transition-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--white);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s ease;
}

.page-transition-overlay.active {
  opacity: 1;
  pointer-events: all;
}

body.case-page-loaded {
  animation: casePageFadeIn 0.5s ease;
}

@keyframes casePageFadeIn {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ==================== 返回按钮 ==================== */
.case-back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  /* 位于深色渐变 Hero 上，需使用浅色保证可读性 */
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.9375rem;
  font-weight: 600;
  text-decoration: none;
  transition: color var(--transition-fast);
  margin-bottom: var(--spacing-lg);
}

.case-back-link:hover {
  color: var(--white);
}

.case-back-link svg {
  transition: transform var(--transition-fast);
}

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

/* ==================== 案例页 Hero 区 ==================== */
.case-hero {
  background: var(--gradient-primary);
  padding: 140px 0 80px;
  position: relative;
  overflow: hidden;
}

.case-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 40%, rgba(0, 82, 163, 0.35) 0%, transparent 50%),
    radial-gradient(circle at 80% 60%, rgba(0, 168, 120, 0.25) 0%, transparent 45%);
}

.case-hero-content {
  position: relative;
  z-index: 1;
}

.case-hero-header {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--spacing-xl);
  align-items: center;
  margin-bottom: var(--spacing-2xl);
}

.case-client-logo {
  width: 80px;
  height: 80px;
  background: var(--white);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--tech-blue);
  box-shadow: var(--shadow-lg);
  flex-shrink: 0;
}

.case-hero-info h1 {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: var(--spacing-sm);
  line-height: 1.3;
}

.case-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  align-items: center;
}

.case-hero-client {
  font-size: 1.125rem;
  color: rgba(255, 255, 255, 0.9);
  font-weight: 500;
}

.case-hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.case-hero-tag {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-xs) var(--spacing-md);
  background: rgba(255, 255, 255, 0.15);
  color: var(--white);
  font-size: 0.8125rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  backdrop-filter: blur(4px);
}

.case-hero-summary {
  font-size: 1.125rem;
  color: rgba(255, 255, 255, 0.85);
  line-height: 1.8;
  max-width: 800px;
}

/* ==================== 案例内容区块 ==================== */
.case-section {
  background: var(--white);
}

.case-section-alt {
  background: var(--gray-50);
}

.case-content {
  max-width: 900px;
  margin: 0 auto;
}

.case-content h2 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: var(--spacing-lg);
  line-height: 1.4;
}

.case-content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--gray-800);
  margin: var(--spacing-xl) 0 var(--spacing-md);
}

.case-content p {
  font-size: 1rem;
  color: var(--gray-600);
  line-height: 1.8;
  margin-bottom: var(--spacing-md);
}

.case-content ul,
.case-content ol {
  margin-bottom: var(--spacing-lg);
  padding-left: var(--spacing-xl);
}

.case-content li {
  font-size: 1rem;
  color: var(--gray-600);
  line-height: 1.8;
  margin-bottom: var(--spacing-sm);
}

.case-highlight-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-md);
  margin: var(--spacing-xl) 0;
  padding: 0;
  list-style: none;
}

.case-highlight-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  background: var(--gray-50);
  border-radius: var(--radius-md);
  margin-bottom: 0;
}

.case-highlight-list li::before {
  content: '';
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2300a878' stroke-width='2.5'%3E%3Cpath d='M20 6L9 17l-5-5'/%3E%3C/svg%3E");
  background-size: contain;
  background-repeat: no-repeat;
  margin-top: 2px;
}

/* ==================== 客户反馈引用 ==================== */
.case-quote {
  background: var(--gradient-tech);
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl);
  position: relative;
  margin: var(--spacing-2xl) 0;
  overflow: hidden;
}

.case-quote::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 10% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 40%),
    radial-gradient(circle at 90% 50%, rgba(0, 168, 120, 0.3) 0%, transparent 35%);
}

.case-quote-content {
  position: relative;
  z-index: 1;
}

.case-quote-icon {
  width: 50px;
  height: 50px;
  margin-bottom: var(--spacing-lg);
  color: rgba(255, 255, 255, 0.4);
}

.case-quote-text {
  font-size: 1.25rem;
  color: var(--white);
  line-height: 1.8;
  font-style: italic;
  margin-bottom: var(--spacing-lg);
}

.case-quote-author {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.case-quote-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-weight: 600;
}

.case-quote-name {
  font-size: 1rem;
  font-weight: 600;
  color: var(--white);
}

.case-quote-title {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.7);
}

/* ==================== 成果数据网格 ==================== */
.case-results-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-lg);
  margin: var(--spacing-xl) 0;
}

.case-result-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  text-align: center;
  box-shadow: var(--shadow-md);
  border-top: 4px solid var(--eco-green);
}

.case-result-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--tech-blue);
  line-height: 1.2;
  margin-bottom: var(--spacing-xs);
}

.case-result-label {
  font-size: 0.875rem;
  color: var(--gray-500);
}

/* ==================== 项目图库 ==================== */
.case-gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
  margin: var(--spacing-xl) 0;
}

.case-gallery-item {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  cursor: zoom-in;
  aspect-ratio: 4 / 3;
}

.case-gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.case-gallery-item:hover img {
  transform: scale(1.05);
}

.case-gallery-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--spacing-md);
  background: linear-gradient(to top, rgba(10, 22, 40, 0.8) 0%, transparent 100%);
  color: var(--white);
  font-size: 0.875rem;
  transform: translateY(100%);
  transition: transform var(--transition-normal);
}

.case-gallery-item:hover .case-gallery-caption {
  transform: translateY(0);
}

/* ==================== 灯箱 ==================== */
.case-lightbox {
  position: fixed;
  inset: 0;
  z-index: 10000;
  background: rgba(10, 22, 40, 0.95);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
  padding: var(--spacing-xl);
}

.case-lightbox.active {
  opacity: 1;
  pointer-events: all;
}

.case-lightbox img {
  max-width: 90vw;
  max-height: 85vh;
  object-fit: contain;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-2xl);
  transform: scale(0.95);
  transition: transform var(--transition-normal);
}

.case-lightbox.active img {
  transform: scale(1);
}

.case-lightbox-close {
  position: absolute;
  top: var(--spacing-xl);
  right: var(--spacing-xl);
  width: 48px;
  height: 48px;
  background: rgba(255, 255, 255, 0.15);
  border: none;
  border-radius: 50%;
  color: var(--white);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-fast);
}

.case-lightbox-close:hover {
  background: rgba(255, 255, 255, 0.25);
}

.case-lightbox-caption {
  position: absolute;
  bottom: var(--spacing-xl);
  left: 50%;
  transform: translateX(-50%);
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.9375rem;
  text-align: center;
  max-width: 80vw;
}

/* ==================== 技术参数表 ==================== */
.case-specs-table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--spacing-xl) 0;
}

.case-specs-table th,
.case-specs-table td {
  padding: var(--spacing-md);
  text-align: left;
  border-bottom: 1px solid var(--gray-100);
}

.case-specs-table th {
  background: var(--gray-50);
  font-weight: 600;
  color: var(--gray-700);
  width: 35%;
}

.case-specs-table td {
  color: var(--gray-600);
}

.case-specs-table tr:hover td {
  background: var(--gray-50);
}

/* ==================== 相关案例推荐 ==================== */
.case-related {
  background: var(--gray-50);
}

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

.case-related-more {
  text-align: center;
  margin-top: var(--spacing-2xl);
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 1023px) {
  .case-hero-header {
    gap: var(--spacing-lg);
  }

  .case-client-logo {
    width: 64px;
    height: 64px;
    font-size: 1rem;
  }

  .case-hero-info h1 {
    font-size: 2rem;
  }

  .case-results-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .case-gallery {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 767px) {
  .case-hero {
    padding: 120px 0 60px;
  }

  .case-hero-header {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .case-client-logo {
    margin: 0 auto;
  }

  .case-hero-info h1 {
    font-size: 1.625rem;
  }

  .case-hero-meta {
    justify-content: center;
  }

  .case-hero-summary {
    font-size: 1rem;
  }

  .case-back-link {
    margin-bottom: var(--spacing-md);
  }

  .case-content h2 {
    font-size: 1.375rem;
  }

  .case-highlight-list {
    grid-template-columns: 1fr;
  }

  .case-results-grid {
    grid-template-columns: 1fr;
  }

  .case-gallery {
    grid-template-columns: 1fr;
  }

  .case-gallery-caption {
    transform: translateY(0);
    background: linear-gradient(to top, rgba(10, 22, 40, 0.8) 0%, transparent 120%);
  }

  .case-related .cases-grid {
    grid-template-columns: 1fr;
  }

  .case-specs-table th,
  .case-specs-table td {
    padding: var(--spacing-sm);
    font-size: 0.875rem;
  }
}