:root {
  --primary-color: #78C950;
  --primary-dark: #5ab840;
  --primary-light: #a8e690;
  --bg-light: #f8f9fa;
  --bg-soft: #f0f5f0;
  --text-primary: #1A1A2E;
  --text-secondary: #4B5563;
  --text-muted: #6B7280;
  --border-color: #E5EAF2;
  --shadow-sm: 0 2px 8px rgba(20,30,60,0.06);
  --shadow-md: 0 8px 24px rgba(20,30,60,0.08);
  --shadow-lg: 0 16px 40px rgba(20,30,60,0.1);
}

/* Hero Section */
.tengzhi-case-hero {
  position: relative;
  height: 400px;
  overflow: hidden;
}

.tengzhi-case-hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
}

.tengzhi-case-hero-bg::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(26,26,46,0.85) 0%, rgba(26,26,46,0.7) 50%, rgba(26,26,46,0.5) 100%);
}

.tengzhi-case-hero-content {
  position: relative;
  z-index: 1;
  max-width: 1450px;
  margin: 0 auto;
  padding: 100px 60px;
  color: #fff;
  text-align: center;
}

.tengzhi-case-hero-tag {
  display: inline-block;
  padding: 8px 16px;
  background: rgba(120,201,80,0.2);
  border: 1px solid rgba(120,201,80,0.3);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 20px;
}

.tengzhi-case-hero-content h1 {
  font-size: 48px;
  font-weight: 800;
  margin: 0 0 16px;
  line-height: 1.1;
}

.tengzhi-case-hero-sub {
  font-size: 18px;
  color: rgba(255,255,255,0.85);
  margin: 0;
}

/* Stats Section */
.tengzhi-case-stats {
  background: #fff;
  padding: 30px 0;
  border-bottom: 1px solid var(--border-color);
}

.tengzhi-case-stats-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 60px;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 40px;
}

.tengzhi-case-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.tengzhi-case-stat-num {
  font-size: 36px;
  font-weight: 800;
  color: var(--primary-color);
  line-height: 1;
}

.tengzhi-case-stat-label {
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 6px;
}

.tengzhi-case-stat-sep {
  width: 1px;
  height: 40px;
  background: var(--border-color);
}

/* Section Base */
.tengzhi-case-section {
  padding: 60px 0;
}

.tengzhi-case-muted {
  background: var(--bg-soft);
}

.tengzhi-case-white {
  background: #fff;
}

.tengzhi-case-inner {
  max-width: 1450px;
  margin: 0 auto;
  padding: 0 60px;
}

/* Section Header */
.tengzhi-case-section-header {
  text-align: center;
  margin-bottom: 48px;
}

.tengzhi-case-badge {
  display: inline-block;
  padding: 6px 14px;
  background: rgba(120,201,80,0.1);
  color: var(--primary-color);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  border-radius: 999px;
  margin-bottom: 12px;
}

.tengzhi-case-section-header h2 {
  font-size: 36px;
  font-weight: 800;
  color: var(--text-primary);
  margin: 0 0 12px;
}

.tengzhi-case-section-sub {
  font-size: 16px;
  color: var(--text-secondary);
  margin: 0;
}

/* Industries Grid */
.tengzhi-case-industries-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.tengzhi-case-industry-card {
  background: #fff;
  border-radius: 16px;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition: all 0.3s;
  box-shadow: var(--shadow-sm);
}

.tengzhi-case-industry-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.tengzhi-case-industry-img {
  position: relative;
  height: 180px;
  background-size: cover;
  background-position: center;
}

.tengzhi-case-industry-tag {
  position: absolute;
  top: 16px;
  left: 16px;
  padding: 6px 12px;
  background: rgba(120,201,80,0.9);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  border-radius: 4px;
}

.tengzhi-case-industry-body {
  padding: 20px;
}

.tengzhi-case-industry-body h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0 0 8px;
}

.tengzhi-case-industry-body p {
  font-size: 14px;
  color: var(--text-secondary);
  margin: 0 0 12px;
  line-height: 1.5;
}

.tengzhi-case-industry-stats {
  display: flex;
  align-items: center;
  gap: 12px;
}

.tengzhi-case-industry-count {
  font-size: 13px;
  color: var(--primary-color);
  font-weight: 600;
}

.tengzhi-case-industry-sep {
  width: 4px;
  height: 4px;
  background: var(--border-color);
  border-radius: 50%;
}

.tengzhi-case-industry-lbl {
  font-size: 13px;
  color: var(--text-muted);
}

/* Featured Cases Grid */
.tengzhi-case-featured-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.tengzhi-case-featured-card {
  position: relative;
  height: 250px;
  background-size: cover;
  background-position: center;
  border-radius: 16px;
  padding: 30px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  text-decoration: none;
  color: #fff;
  transition: all 0.3s;
}

.tengzhi-case-featured-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(180deg, rgba(0,0,0,0.2) 0%, rgba(0,0,0,0.8) 100%);
  border-radius: 16px;
}

.tengzhi-case-featured-card:hover {
  transform: translateY(-4px);
}

.tengzhi-case-featured-card > * {
  position: relative;
  z-index: 1;
}

.tengzhi-case-featured-tag {
  display: inline-block;
  padding: 4px 10px;
  background: rgba(120,201,80,0.8);
  font-size: 11px;
  font-weight: 600;
  border-radius: 4px;
  margin-bottom: 12px;
  width: fit-content;
}

.tengzhi-case-featured-card h3 {
  font-size: 20px;
  font-weight: 700;
  margin: 0 0 8px;
}

.tengzhi-case-featured-card p {
  font-size: 14px;
  color: rgba(255,255,255,0.8);
  margin: 0;
  line-height: 1.5;
}

/* Case List Grid */
.tengzhi-case-list-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.tengzhi-case-list-card {
  background: #fff;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s;
}

.tengzhi-case-list-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.tengzhi-case-list-img {
  height: 180px;
  overflow: hidden;
}

.tengzhi-case-list-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.tengzhi-case-list-body {
  padding: 20px;
}

.tengzhi-case-list-tags {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
}

.tengzhi-case-list-tag {
  padding: 4px 10px;
  background: rgba(120,201,80,0.1);
  color: var(--primary-color);
  font-size: 11px;
  font-weight: 600;
  border-radius: 4px;
}

.tengzhi-case-list-body h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0 0 8px;
}

.tengzhi-case-list-body p {
  font-size: 14px;
  color: var(--text-secondary);
  margin: 0 0 12px;
  line-height: 1.5;
}

.tengzhi-case-list-metrics {
  display: flex;
  gap: 16px;
  margin-bottom: 12px;
}

.tengzhi-case-list-metrics span {
  font-size: 12px;
  color: var(--text-muted);
  padding: 4px 8px;
  background: var(--bg-light);
  border-radius: 4px;
}

.tengzhi-case-list-link {
  display: inline-flex;
  align-items: center;
  color: var(--primary-color);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition: color 0.3s;
}

.tengzhi-case-list-link:hover {
  color: var(--primary-dark);
}

/* CTA Section */
.tengzhi-section-cta {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  padding: 80px 60px;
  text-align: center;
  margin-top: 20px;
}

.tengzhi-cta-content {
  max-width: 800px;
  margin: 0 auto;
}

.tengzhi-cta-title {
  font-size: 42px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 20px;
  letter-spacing: 1px;
}

.tengzhi-cta-subtitle {
  font-size: 18px;
  color: rgba(255,255,255,0.85);
  margin-bottom: 32px;
  line-height: 1.6;
}

.tengzhi-cta-btn-group {
  display: flex;
  gap: 16px;
  justify-content: center;
}

.tengzhi-cta-btn-primary {
  display: inline-flex;
  align-items: center;
  padding: 16px 32px;
  background: #fff;
  color: #667eea;
  font-size: 15px;
  font-weight: 700;
  border-radius: 10px;
  text-decoration: none;
  transition: all 0.3s ease;
}

.tengzhi-cta-btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.2);
}

.tengzhi-cta-btn-secondary {
  display: inline-flex;
  align-items: center;
  padding: 16px 32px;
  background: rgba(255,255,255,0.15);
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  border: 2px solid rgba(255,255,255,0.3);
  border-radius: 10px;
  text-decoration: none;
  transition: all 0.3s ease;
}

.tengzhi-cta-btn-secondary:hover {
  background: rgba(255,255,255,0.25);
  border-color: rgba(255,255,255,0.5);
}

/* Responsive */
@media (max-width: 1180px) {
  .tengzhi-case-inner {
    padding: 0 40px;
  }
  
  .tengzhi-case-stats-inner {
    padding: 0 40px;
  }
  
  .tengzhi-case-industries-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .tengzhi-case-featured-grid {
    grid-template-columns: 1fr;
  }
  
  .tengzhi-case-list-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 860px) {
  .tengzhi-case-hero-content {
    padding: 80px 30px;
  }
  
  .tengzhi-case-hero-content h1 {
    font-size: 36px;
  }
  
  .tengzhi-case-inner {
    padding: 0 30px;
  }
  
  .tengzhi-case-stats-inner {
    flex-wrap: wrap;
    gap: 24px;
  }
  
  .tengzhi-case-stat-sep {
    display: none;
  }
  
  .tengzhi-case-list-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 520px) {
  .tengzhi-case-hero-content h1 {
    font-size: 28px;
  }
  
  .tengzhi-case-hero-sub {
    font-size: 16px;
  }
  
  .tengzhi-case-industries-grid {
    grid-template-columns: 1fr;
  }
  
  .tengzhi-section-cta {
    padding: 60px 20px;
  }
  
  .tengzhi-cta-title {
    font-size: 28px;
  }
  
  .tengzhi-cta-btn-group {
    flex-direction: column;
    align-items: center;
  }
  
  .tengzhi-cta-btn-primary,
  .tengzhi-cta-btn-secondary {
    width: 100%;
    max-width: 280px;
    justify-content: center;
  }
}