/* 调整TOC模式选择器样式 */
.toc-mode-selector {
  display: none; /* 默认隐藏，由JavaScript控制显示 */
  gap: 4px;
  margin: 6px 8px;
  padding: 4px;
  background-color: #f5f7fa;
  border-radius: 4px;
  justify-content: center;
}

.toc-mode-btn {
  padding: 3px 8px;
  border: 1px solid #ddd;
  border-radius: 4px;
  background-color: #fff;
  cursor: pointer;
  font-size: 11px; /* 减小字体大小 */
  transition: all 0.2s ease;
}

/* 多行TOC文本布局 */
#toc-list .toc-text {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  line-height: 1.5;
  width: 100%;
  padding: 0; /* 移除内边距 */
  margin: 0; /* 移除外边距 */
}

#toc-list li.has-children > a .toc-text {
  padding-left: 0;
}

/* 针对不同级别标题的文本缩进调整 */
#toc-list li.toc-h2 a .toc-text {
  padding-left: 4px; /* 减小缩进 */
}

#toc-list li.toc-h3 a .toc-text {
  padding-left: 4px; /* 减小缩进 */
}

#toc-list li.toc-h4 a .toc-text,
#toc-list li.toc-h5 a .toc-text,
#toc-list li.toc-h6 a .toc-text {
  padding-left: 4px; /* 减小缩进 */
}

/* 图表标题在TOC中的特殊样式 */
#toc-list li.toc-caption a::before {
  content: "📊 ";
  margin-right: 4px;
  font-size: 14px;
}

#toc-list li.toc-caption a {
  color: #2563eb;
  font-style: italic;
}

#toc-list li.toc-caption a:hover {
  background-color: rgba(37, 99, 235, 0.1);
}

/* TOC 结构化标题样式 */
/* 通用结构化标题样式 */
.toc-structured .toc-prefix {
  font-weight: bold;
  color: #0066cc;
  margin-right: 4px;
  display: inline-block;
}

/* 章节标题样式（如"第一章"） */
.toc-structure-chapter .toc-prefix {
  color: #d32f2f;
  font-size: 1.1em;
}

/* 数字编号标题样式（如"1.1"） */
.toc-structure-numeric .toc-prefix {
  font-family: 'Consolas', monospace;
  letter-spacing: 0.5px;
}

/* 罗马数字标题样式 */
.toc-structure-roman .toc-prefix {
  font-style: italic;
  color: #6a1b9a;
}

/* 字母标题样式 */
.toc-structure-letter .toc-prefix {
  color: #00695c;
}

/* 添加toc-content类的样式 */
.toc-content {
  display: inline-block;
  flex: 1;
  min-width: 0;
  word-break: break-word;
  overflow-wrap: break-word;
  white-space: normal;
  font-weight: normal; /* 普通字重 */
}

/* 可以通过首字符样式强调，但不单独拿出来 */
.toc-content::first-letter {
  font-weight: 600; /* 稍微加粗首字母 */
  color: #2563eb; /* 首字母使用蓝色 */
}

/* 结构化标题内容的特殊处理 */
.toc-structured .toc-content {
  padding-left: 0;
  margin-left: 2px; /* 与前缀之间添加小间距 */
}

/* 结构化标题缩进优化 */
/* 第一级（章节）不缩进 */
#toc-list > li.toc-structured {
  padding-left: 0;
}

/* 各级结构化标题的缩进 */
#toc-list .toc-structured.toc-h1 { padding-left: 0; }
#toc-list .toc-structured.toc-h2 { padding-left: 12px; }
#toc-list .toc-structured.toc-h3 { padding-left: 24px; }
#toc-list .toc-structured.toc-h4 { padding-left: 36px; }
#toc-list .toc-structured.toc-h5 { padding-left: 48px; }
#toc-list .toc-structured.toc-h6 { padding-left: 60px; }

/* 图表标题作为子项的样式调整 */
.toc-caption {
  font-style: italic;
  color: #616161;
  padding-left: 12px !important; /* 覆盖默认缩进，确保图表标题作为子项正确缩进 */
}

/* 结构化标题的图表子项缩进 */
.toc-structured + li.toc-caption {
  padding-left: 24px !important;
}

/* 图表图标样式 */
.toc-chart-icon {
  margin-right: 4px;
  font-size: 0.9em;
  opacity: 0.8;
}

/* 表格和图表的不同样式 */
.toc-caption:hover {
  background-color: rgba(0, 0, 0, 0.03);
}

/* 图表标题悬停效果 */
.toc-caption:hover .toc-chart-icon {
  opacity: 1;
}

/* 强化层级视觉效果 */
/* 为结构化标题添加微妙的左边框，表示层级 */
.toc-structured {
  border-left: none;
  position: relative;
}

.toc-structured.toc-h2 {
  border-left: 3px solid rgba(0, 102, 204, 0.1);
}

.toc-structured.toc-h3 {
  border-left: 3px solid rgba(0, 102, 204, 0.15);
}

.toc-structured.toc-h4 {
  border-left: 3px solid rgba(0, 102, 204, 0.2);
}

.toc-structured.toc-h5, .toc-structured.toc-h6 {
  border-left: 3px solid rgba(0, 102, 204, 0.25);
}

/* 图表标题与其父级关联 */
.toc-caption {
  position: relative;
}

.toc-caption::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  border-left: 2px dotted rgba(97, 97, 97, 0.2);
}

/* 优化折叠按钮与结构化标题的对齐 */
.toc-structured .toc-toggle {
  margin-right: 4px;
}

/* 强化TOC的视觉层级 */
#toc-list ul.toc-children {
  margin-left: 0;
  border-left: 1px solid rgba(0, 0, 0, 0.05);
}

/* 简单数字列表项样式 */
.toc-simple-numbered {
  position: relative;
}

/* 简单数字列表前缀样式 */
.toc-simple-numbered .toc-prefix {
  color: #2563eb;
  font-weight: bold;
  font-size: 0.9em;
}

/* 增加简单数字列表项的缩进，使其看起来更像子项 */
#toc-list li.toc-simple-numbered {
  padding-left: 12px !important;
}

/* 添加连接线，显示层级关系 */
.toc-simple-numbered::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  border-left: 2px dotted rgba(37, 99, 235, 0.3);
}

/* 简单数字列表项悬停效果 */
.toc-simple-numbered:hover::before {
  border-left-color: rgba(37, 99, 235, 0.6);
}

/* 调整不同结构下的简单数字列表缩进 */
.toc-structure-numeric + .toc-simple-numbered,
.toc-structure-chapter + .toc-simple-numbered,
.toc-structure-roman + .toc-simple-numbered,
.toc-structure-letter + .toc-simple-numbered,
.toc-structure-special + .toc-simple-numbered {
  margin-left: 12px;
}

/* 保持简单数字列表项之间的连续性 */
.toc-simple-numbered + .toc-simple-numbered {
  margin-top: 0;
  border-top: none;
}

/* 带空格多级编号标题样式 */
.toc-spaced-numeric .toc-prefix {
  font-family: 'Consolas', monospace;
  letter-spacing: 0.5px;
  color: #0066cc;
  font-weight: bold;
}

/* 带空格多级编号标题悬停效果 */
.toc-spaced-numeric:hover {
  background-color: rgba(0, 102, 204, 0.05);
}

/* 确保带空格多级编号标题与标准数字编号具有相同的缩进 */
#toc-list .toc-spaced-numeric {
  padding-left: inherit; /* 继承标准数字编号的缩进 */
}

/* 优化带空格多级编号与其子项的连接线 */
.toc-spaced-numeric + li:not(.toc-spaced-numeric):before {
  content: '';
  position: absolute;
  left: 0;
  top: -10px;
  height: 10px;
  border-left: 2px dotted rgba(0, 102, 204, 0.2);
}

/* TOC展开模式样式 */
#toc-popup {
  transition: width 0.3s ease-in-out;
}

#toc-popup.toc-expanded {
  width: 440px; /* 展开模式宽度为原来的2倍 */
}

/* 展开按钮样式 */
#toc-expand-btn {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  background: transparent;
  border: none;
  color: #3b82f6;
  cursor: pointer;
  font-size: 18px;
  padding: 4px;
  border-radius: 4px;
  line-height: 1;
  opacity: 0.7;
  transition: opacity 0.2s, background-color 0.2s;
}

#toc-expand-btn:hover {
  opacity: 1;
  background-color: rgba(59, 130, 246, 0.1);
}

/* 控制非展开模式下的文本显示 */
#toc-popup:not(.toc-expanded) .toc-text {
  max-height: 3.9em; /* 三行文本的高度 */
  overflow: hidden;
  text-overflow: ellipsis;
  /* 保持flex布局，但限制显示行数 */
  display: -webkit-box;
  -webkit-line-clamp: 3; /* 限制显示3行 */
  -webkit-box-orient: vertical;
}

/* 非展开模式下也保持首字符的显示 */
#toc-popup:not(.toc-expanded) .toc-content::first-letter {
  font-weight: 600;
  color: #2563eb;
}

/* 在展开模式下取消文本限制 */
#toc-popup.toc-expanded .toc-text {
  max-height: none;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  -webkit-line-clamp: unset;
}

/* TOC底部控制按钮区域 */
.toc-controls {
  padding: 8px 12px;
  text-align: center;
  border-top: 1px solid #e2e8f0;
  font-size: 0.8em;
  color: #64748b;
}

.toc-control-btn {
  background: transparent;
  border: none;
  margin: 0 6px;
  padding: 2px 6px;
  color: #3b82f6;
  cursor: pointer;
  border-radius: 4px;
  transition: background-color 0.2s;
}

.toc-control-btn:hover {
  background-color: rgba(59, 130, 246, 0.1);
}

/* 结构化标题的首字母样式特殊处理，避免与前缀冲突 */
.toc-structured .toc-content::first-letter {
  font-weight: normal; /* 恢复普通字重，避免与前缀重叠强调 */
  color: inherit; /* 使用继承的颜色，避免与前缀重叠强调 */
}

/* 图表标题的特殊样式处理 */
.toc-caption .toc-content {
  font-style: italic; /* 保持图表标题的斜体 */
  color: #2563eb; /* 保持蓝色 */
}

/* 图表标题的首字母保持与其他内容一致 */
.toc-caption .toc-content::first-letter {
  font-weight: inherit;
  color: inherit;
}

#toc-list .toc-text,
#toc-list .toc-content {
  font-size: 12px !important;
  line-height: 1.2 !important;
  padding: 1px 0 !important;
}

.toc-content {
  display: -webkit-box !important;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
  min-width: 0;
  word-break: break-all;
  white-space: normal;
}