/* 专利详情页面样式 */
.patent-detail-container {
  min-height: 100vh;
  background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  padding: 40px 0;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* 返回导航 */
.back-navigation {
  margin-bottom: 30px;
}

.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: #667eea;
  text-decoration: none;
  font-weight: 500;
  padding: 10px 20px;
  border-radius: 25px;
  background: white;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
}

.back-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
  text-decoration: none;
  color: #667eea;
}

.icon-arrow-left::before {
  content: "←";
  font-size: 1.2rem;
}

/* 专利基本信息 */
.patent-info {
  background: white;
  border-radius: 15px;
  padding: 40px;
  margin-bottom: 40px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.patent-header {
  display: flex;
  gap: 15px;
  margin-bottom: 25px;
  flex-wrap: wrap;
}

.patent-number-badge {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 12px 24px;
  border-radius: 25px;
  font-weight: 600;
  font-size: 1.1rem;
}

.patent-status-badge {
  background: #27ae60;
  color: white;
  padding: 12px 20px;
  border-radius: 25px;
  font-weight: 500;
  font-size: 1rem;
}

.patent-title {
  font-size: 2.2rem;
  font-weight: 700;
  color: #2c3e50;
  line-height: 1.3;
  margin-bottom: 30px;
}

/* 专利摘要部分 */
.patent-abstract-section {
  border-top: 1px solid #ecf0f1;
  padding-top: 30px;
}

.section-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: #2c3e50;
  margin-bottom: 20px;
  position: relative;
  padding-left: 20px;
}

.section-title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 24px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border-radius: 2px;
}

.patent-abstract {
  font-size: 1.1rem;
  line-height: 1.8;
  color: #555;
  text-align: justify;
}

/* 专利证书 */
.patent-certificates {
  background: white;
  border-radius: 15px;
  padding: 40px;
  margin-bottom: 40px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.certificates-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
}

.certificate-item {
  text-align: center;
}

.certificate-image {
  position: relative;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
  cursor: pointer;
  transition: all 0.3s ease;
}

.certificate-image:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
}

.certificate-image img {
  width: 100%;
  height: auto;
  display: block;
  transition: all 0.3s ease;
}

.certificate-image:hover img {
  transform: scale(1.05);
}

.image-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  opacity: 0;
  transition: all 0.3s ease;
  color: white;
}

.certificate-image:hover .image-overlay {
  opacity: 1;
}

.icon-zoom-in::before {
  content: "🔍";
  font-size: 2rem;
  margin-bottom: 10px;
}

.certificate-label {
  margin-top: 15px;
  font-weight: 500;
  color: #2c3e50;
  font-size: 1.1rem;
}

/* 专利信息 */
.patent-meta {
  background: white;
  border-radius: 15px;
  padding: 40px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.meta-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 25px;
}

.meta-item {
  padding: 20px;
  background: #f8f9fa;
  border-radius: 10px;
  border-left: 4px solid #667eea;
}

.meta-label {
  font-weight: 600;
  color: #7f8c8d;
  font-size: 0.9rem;
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.meta-value {
  font-size: 1.1rem;
  color: #2c3e50;
  font-weight: 500;
}

/* 图片模态框 */
.image-modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.9);
  opacity: 0;
  transition: opacity 0.3s ease;
  cursor: pointer;
}

.modal-content {
  position: relative;
  margin: auto;
  padding: 20px;
  width: 90%;
  max-width: 800px;
  top: 50%;
  transform: translateY(-50%);
  text-align: center;
  cursor: default;
}

.modal-content img {
  max-width: 100%;
  max-height: 80vh;
  border-radius: 10px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.close-btn {
  position: absolute;
  top: 10px;
  right: 25px;
  color: white;
  font-size: 35px;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.3s ease;
}

.close-btn:hover {
  color: #667eea;
  transform: scale(1.1);
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* 响应式设计 */
@media (max-width: 768px) {
  .patent-detail-container {
    padding: 20px 0;
  }
  
  .patent-info,
  .patent-certificates,
  .patent-meta {
    padding: 25px;
    margin-bottom: 25px;
  }
  
  .patent-title {
    font-size: 1.8rem;
  }
  
  .section-title {
    font-size: 1.3rem;
  }
  
  .certificates-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .meta-grid {
    grid-template-columns: 1fr;
    gap: 15px;
  }
  
  .patent-header {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 15px;
  }
  
  .patent-info,
  .patent-certificates,
  .patent-meta {
    padding: 20px;
  }
  
  .patent-title {
    font-size: 1.5rem;
  }
  
  .patent-number-badge,
  .patent-status-badge {
    padding: 10px 16px;
    font-size: 0.9rem;
  }
  
  .modal-content {
    width: 95%;
    padding: 10px;
  }
  
  .close-btn {
    top: 5px;
    right: 15px;
    font-size: 30px;
  }
}