/* 基础样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}


/* 导航方框样式 */
.content-container {
  margin-top: 120px; /* 留出导航栏高度 */
  padding: 20px 5%;
}

.nav-boxes {
  display: flex;
  justify-content: space-between;
  margin: 30px 0;
}

.nav-box {
  flex: 1;
  min-width: 28%;
  margin: 0 1%;
  padding: 20px;
  text-align: center;
  background: #f0f0f0;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s ease;
}

.nav-box:hover {
  background: #2196F3;
  color: white;
  transform: translateY(-5px);
}


/* 图片 */
.cover-image {
  width: 100%;
  height: 500px;
  display: block;
  object-fit: cover;
}

.banner-title {
  position: absolute;
  top: calc(50% - 200px);
  left: 15%;
  transform: translateY(-50%);
  z-index: 2;
  color: white;
  font-size: 3em;
  text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
  text-align: left;
  padding-left: 20px;
}

/* 解决方案内容样式 */
.solution-content {
  background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
  padding: 80px 20px;
}

.solution-content .content-container {
  margin-top: 0;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  display: flex;
  align-items: flex-start;
  gap: 80px;
}

.text-section {
  flex: 1.2;
  min-width: 0;
}

.section-badge {
  display: inline-block;
  background: linear-gradient(135deg, #2196F3, #1976D2);
  color: white;
  padding: 8px 20px;
  border-radius: 20px;
  font-size: 0.9em;
  font-weight: 600;
  margin-bottom: 20px;
  box-shadow: 0 2px 8px rgba(33, 150, 243, 0.3);
}

.main-title {
  font-size: 2.8em;
  color: #1a1a1a;
  margin-bottom: 15px;
  font-weight: 700;
  line-height: 1.2;
}

.sub-title {
  font-size: 1.6em;
  color: #2196F3;
  margin-bottom: 40px;
  font-weight: 500;
  opacity: 0.9;
}

.description {
  background: white;
  padding: 40px;
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}

.problem-section,
.solution-section,
.result-section {
  margin-bottom: 30px;
}

.problem-section:last-child,
.solution-section:last-child,
.result-section:last-child {
  margin-bottom: 0;
}

.problem-section h4,
.solution-section h4,
.result-section h4 {
  font-size: 1.3em;
  margin-bottom: 15px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.problem-section h4 {
  color: #f44336;
}

.solution-section h4 {
  color: #4caf50;
}

.result-section h4 {
  color: #ff9800;
}

.problem-section ul,
.solution-section ul {
  margin: 0;
  padding-left: 0;
  list-style: none;
}

.problem-section li,
.solution-section li {
  padding: 8px 0;
  padding-left: 25px;
  position: relative;
  line-height: 1.6;
  color: #555;
}

.problem-section li::before {
  content: "⚠";
  position: absolute;
  left: 0;
  color: #f44336;
}

.solution-section li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: #4caf50;
  font-weight: bold;
}

.solution-section strong {
  color: #2196F3;
  font-weight: 600;
}

.result-section p {
  font-size: 1.1em;
  line-height: 1.8;
  color: #333;
  margin: 0;
  padding: 15px;
  background: #f8f9fa;
  border-left: 4px solid #ff9800;
  border-radius: 4px;
}

.image-section {
  flex: 1;
  min-width: 0;
}

.image-container {
  position: relative;
  background: white;
  padding: 20px;
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}

.feature-image {
  width: 100%;
  height: auto;
  border-radius: 8px;
  transition: transform 0.3s ease;
}

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

.image-caption {
  margin-top: 15px;
  font-size: 0.9em;
  color: #666;
  text-align: center;
  font-style: italic;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .content-container {
    flex-direction: column;
    gap: 40px;
  }
  
  .text-section,
  .image-section {
    max-width: 100%;
  }
  
  .main-title {
    font-size: 1.8em;
  }
  
  .sub-title {
    font-size: 1.1em;
  }
  
  .description p {
    font-size: 1em;
  }
}