/* 专题页面 - PET-CT中心 */

/* 英雄区域 */
.pet-ct-hero {
  background-image: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('https://picx.zhimg.com/100/v2-9bb83194a2a24dc9add6ce1825a6dc26_r.jpg');
  background-size: cover;
  background-position: center;
  color: white;
  padding: 120px 0 80px;
  text-align: center;
  position: relative;
}

.pet-ct-hero h1 {
  font-size: 3rem;
  margin-bottom: 15px;
  color: white;
  font-weight: 700;
  text-shadow: 0 2px 5px rgba(0,0,0,0.3);
}

.pet-ct-hero .subtitle {
  font-family: var(--font-sans-en);
  font-size: 1.2rem;
  color: rgba(255,255,255,0.9);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 25px;
}

.pet-ct-hero p {
  font-size: 1.1rem;
  max-width: 800px;
  margin: 0 auto 40px;
  line-height: 1.6;
  color: rgba(255,255,255,0.9);
}

.hero-cta {
  display: inline-block;
  background-color: #2aae67;
  color: white;
  padding: 12px 30px;
  border-radius: 30px;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s ease;
  box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

.hero-cta:hover {
  background-color: #229957;
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.3);
}

/* 导航 */
.pet-ct-nav {
  position: sticky;
  top: 80px;
  background-color: #2aae67;
  padding: 15px 0;
  z-index: 100;
  box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

.pet-ct-nav.sticky {
  position: fixed;
  top: 0;
  width: 100%;
  animation: slideDown 0.3s forwards;
}

@keyframes slideDown {
  from {
    transform: translateY(-100%);
  }
  to {
    transform: translateY(0);
  }
}

.pet-ct-nav-container {
  display: flex;
  justify-content: space-between;
  overflow-x: auto;
  white-space: nowrap;
  padding-bottom: 5px;
}

.pet-ct-nav-container::-webkit-scrollbar {
  height: 3px;
}

.pet-ct-nav-container::-webkit-scrollbar-track {
  background: rgba(255,255,255,0.1);
}

.pet-ct-nav-container::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.3);
  border-radius: 3px;
}

.pet-ct-nav-item {
  color: white;
  padding: 8px 15px;
  font-weight: 500;
  border-radius: 20px;
  transition: all 0.3s ease;
}

.pet-ct-nav-item:hover, .pet-ct-nav-item.active {
  background-color: rgba(255,255,255,0.2);
}

/* 通用部分样式 */
.section-title {
  text-align: center;
  margin-bottom: 50px;
}

.section-title h2 {
  font-size: 2rem;
  color: #333;
  margin-bottom: 10px;
  font-weight: 700;
}

.section-title .subtitle {
  font-size: 1rem;
  color: #2aae67;
  text-transform: uppercase;
  letter-spacing: 2px;
  font-weight: 500;
  font-family: var(--font-sans-en);
}

.intro-section, 
.principle-section,
.equipment-section,
.applications-section,
.process-section,
.cases-section,
.faq-section {
  padding: 80px 0;
}

.intro-section, 
.applications-section,
.cases-section {
  background-color: #f8f9fa;
}

/* 介绍区样式 */
.intro-text {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  margin-bottom: 50px;
}

.intro-highlight {
  flex: 1;
  min-width: 300px;
  font-size: 1.1rem;
  line-height: 1.7;
  color: #333;
  padding-right: 30px;
}

.intro-image {
  flex: 1;
  min-width: 300px;
  text-align: center;
}

.intro-image img {
  max-width: 100%;
  border-radius: 10px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.key-features {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 30px;
  margin-top: 30px;
}

.feature-item {
  background-color: #fff;
  border-radius: 10px;
  padding: 25px;
  width: 280px;
  text-align: center;
  box-shadow: 0 5px 15px rgba(0,0,0,0.05);
  transition: all 0.3s ease;
}

.feature-item:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 30px rgba(42,174,103,0.1);
}

.feature-icon {
  width: 70px;
  height: 70px;
  margin: 0 auto 20px;
  background-color: rgba(42,174,103,0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #2aae67;
  font-size: 1.8rem;
}

.feature-item h3 {
  font-size: 1.1rem;
  margin-bottom: 15px;
  color: #333;
}

.feature-item p {
  font-size: 0.9rem;
  color: #666;
  line-height: 1.6;
}

/* 响应式调整 */
@media (max-width: 992px) {
  .pet-ct-hero h1 {
    font-size: 2.5rem;
  }
  
  .pet-ct-hero .subtitle {
    font-size: 1rem;
  }
  
  .pet-ct-hero p {
    font-size: 1rem;
  }
  
  .intro-highlight {
    padding-right: 0;
    margin-bottom: 30px;
  }
}

@media (max-width: 768px) {
  .pet-ct-hero {
    padding: 100px 0 60px;
  }
  
  .pet-ct-hero h1 {
    font-size: 2rem;
  }
  
  .pet-ct-nav-container {
    justify-content: flex-start;
    padding-bottom: 10px;
  }
  
  .pet-ct-nav-item {
    padding: 6px 12px;
    font-size: 0.9rem;
  }
  
  .section-title h2 {
    font-size: 1.8rem;
  }
  
  .section-title .subtitle {
    font-size: 0.9rem;
  }
  
  .intro-section, 
  .principle-section,
  .equipment-section,
  .applications-section,
  .process-section,
  .cases-section,
  .faq-section {
    padding: 60px 0;
  }
}

/* 底部CTA区域 */
.pet-ct-cta {
  background-image: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url('https://picx.zhimg.com/100/v2-a3bbf20f24e3267324fe2e951ed0c150_r.jpg');
  background-size: cover;
  background-position: center;
  padding: 80px 0;
  text-align: center;
  color: white;
}

.pet-ct-cta h2 {
  font-size: 2rem;
  margin-bottom: 20px;
  color: white;
}

.pet-ct-cta p {
  font-size: 1.1rem;
  max-width: 800px;
  margin: 0 auto 30px;
  line-height: 1.6;
  color: rgba(255,255,255,0.9);
}

.cta-buttons {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

.cta-button {
  display: inline-block;
  background-color: #2aae67;
  color: white;
  padding: 15px 35px;
  border-radius: 30px;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s ease;
  box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

.cta-button:hover {
  background-color: #229957;
  transform: translateY(-3px);
  box-shadow: 0 10px 20px rgba(0,0,0,0.3);
}

.cta-button.secondary {
  background-color: transparent;
  border: 2px solid white;
}

.cta-button.secondary:hover {
  background-color: rgba(255,255,255,0.1);
}