/* 内容页面布局样式 */
.content-wrapper {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
  padding-top: 80px; /* 添加顶部内边距，防止内容被导航栏遮挡 */
}

@media (max-width: 768px) {
  .content-wrapper {
    width: 95%;
    padding-top: 60px;
  }
}

.content-container {
  display: flex;
  margin: 20px 0;
  min-height: calc(100vh - 200px);
}

/* 左侧侧边栏样式 */
.sidebar {
  width: 250px;
  padding: 20px;
  background-color: #f5f5f5;
  border-right: 1px solid #e0e0e0;
  flex-shrink: 0;
  position: sticky; /* 使侧边栏固定 */
  top: 80px; /* 与导航栏保持距离 */
  height: calc(100vh - 80px); /* 设置高度为视口高度减去顶部距离 */
  overflow-y: auto; /* 如果目录内容过多，允许滚动 */
}

.sidebar-title {
  font-size: 1.2rem;
  margin-bottom: 15px;
  padding-bottom: 10px;
  border-bottom: 1px solid #ddd;
  color: #242424;
}

.sidebar-menu {
  list-style-type: none;
  padding: 0;
  margin: 0;
}

.sidebar-item {
  margin-bottom: 8px;
  font-size: 1rem;
}

.sidebar-item a {
  display: block;
  padding: 8px 10px;
  color: #242424;
  text-decoration: none;
  border-radius: 4px;
  transition: all 0.3s ease;
}

.sidebar-item a:hover {
  background-color: #e0e0e0;
}

.sidebar-item.active > a {
  background-color: #333;
  color: white;
}

.sidebar-submenu {
  list-style-type: none;
  padding-left: 20px;
  margin-top: 5px;
  display: none;
}

.sidebar-item.active .sidebar-submenu {
  display: block;
}

.sidebar-subitem {
  margin-bottom: 5px;
}

.sidebar-subitem a {
  padding: 6px 10px;
  font-size: 0.9rem;
}

.sidebar-subitem.active a {
  background-color: #444;
  color: white;
}

/* 右侧内容区域样式 */
.main-content {
  flex-grow: 1;
  padding: 25px 35px;
  overflow-y: auto;
  background-color: #fff;
  box-shadow: 0 1px 8px rgba(0, 0, 0, 0.03);
  border-radius: 6px;
}

.main-content h1 {
  font-size: 2rem;
  margin-bottom: 20px;
  color: #242424;
  border-bottom: 2px solid #333;
  padding-bottom: 12px;
  font-family: 'Alimama ShuHeiTi', sans-serif;
  font-weight: 700;
}

.main-content h2 {
  font-size: 1.5rem;
  margin: 25px 0 15px;
  color: #242424;
  padding-left: 12px;
  border-left: 3px solid #333;
  font-family: 'Alimama ShuHeiTi', sans-serif;
  font-weight: 600;
}

.main-content p {
  margin-bottom: 18px;
  line-height: 1.7;
  color: #242424;
  font-size: 1rem;
}

.feature-card p {
  margin-bottom: 0;
  line-height: 1.6;
}

.main-content ul {
  margin-bottom: 25px;
  padding-left: 20px;
}

.main-content li {
  margin-bottom: 12px;
  line-height: 1.7;
  position: relative;
}

.main-content li strong {
  color: #242424;
  font-weight: 600;
  font-size: 1.1rem;
  display: inline-block;
  margin-bottom: 5px;
}

.main-content section {
  margin-bottom: 50px;
  padding-bottom: 20px;
}

/* 图片容器样式 */
.image-container {
  margin: 25px 0;
  text-align: center;
  padding: 12px;
  background-color: #f9f9f9;
  border-radius: 6px;
}

.content-image {
  max-width: 100%;
  height: auto;
  border: 1px solid #e0e0e0;
  border-radius: 4px;
}

.image-caption {
  margin-top: 10px;
  font-style: italic;
  color: #242424;
}

/* 卡片效果 */
.feature-card {
  background-color: #f9f9f9;
  border-radius: 6px;
  padding: 12px 18px;
  margin-bottom: 15px;
}

.feature-card h3 {
  font-size: 1.2rem;
  margin-bottom: 8px;
  color: #242424;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .content-container {
    flex-direction: column;
  }
  
  .sidebar {
    display: none; /* 移动端隐藏左侧目录 */
  }
  
  .main-content {
    padding: 25px 20px;
    width: 100%;
  }
  
  /* 移动端增大字体 */
  .main-content h1 {
    font-size: 2.4rem;
  }
  
  .main-content h2 {
    font-size: 2rem;
  }
  
  .main-content p {
    font-size: 1.4rem;
    line-height: 1.9;
  }
  
  .feature-card h3 {
    font-size: 1.7rem;
    margin-bottom: 12px;
  }
  
  .feature-card p {
    font-size: 1.4rem;
    line-height: 1.8;
  }
}

/* 前言和概述样式 */
.intro-text {
  background-color: #f9f9f9;
  padding: 20px;
  border-radius: 6px;
  border-left: 3px solid #333;
  margin: 15px 0 25px;
}

.intro-text p {
  margin-bottom: 0;
  font-size: 1.1rem;
  line-height: 1.8;
  text-align: justify;
  color: #242424;
}

.overview-content {
  background-color: #f9f9f9;
  padding: 20px;
  border-radius: 6px;
  margin: 15px 0;
}

.overview-content p {
  margin-bottom: 0;
  font-size: 1.1rem;
  line-height: 1.8;
  color: #242424;
}

/* 未来展望样式 */
.future-vision {
  background-color: #f9f9f9;
  padding: 20px;
  border-radius: 6px;
  margin: 15px 0;
  border-top: 3px solid #333;
}

.future-vision p {
  margin-bottom: 0;
  font-size: 1.1rem;
  line-height: 1.8;
  color: #242424;
  text-align: justify;
}