/* ======= 0. CSS 变量定义 (亮色/暗色模式) ======= */
:root {
  /* 亮色模式变量 */
  --bg-primary: #f6f8fa;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f6f8fa;
  --text-primary: #24292f;
  --text-secondary: #57606a;
  --text-link: #0969da;
  --text-link-hover: #0550ae;
  --border-color: #d0d7de;
  --border-light: rgba(208, 215, 222, 0.8);
  --nav-bg: rgba(255, 255, 255, 0.6);
  --code-bg: #f6f8fa;
  --code-inline-bg: rgba(175, 184, 193, 0.2);
  --table-bg: #fff;
  --table-stripe-bg: #f6f8fa;
  --table-header-bg: #f6f8fa;
  --blockquote-border: #dfe2e5;
  --blockquote-text: #6a737d;
  --dropdown-bg: #fff;
  --dropdown-hover-bg: #f6f8fa;
}

.dark {
  /* 暗色模式变量 */
  --bg-primary: #0d1117;
  --bg-secondary: #161b22;
  --bg-tertiary: #21262d;
  --text-primary: #c9d1d9;
  --text-secondary: #8b949e;
  --text-link: #58a6ff;
  --text-link-hover: #79c0ff;
  --border-color: #30363d;
  --border-light: rgba(48, 54, 61, 0.8);
  --nav-bg: rgba(22, 27, 34, 0.8);
  --code-bg: #161b22;
  --code-inline-bg: rgba(110, 118, 129, 0.4);
  --table-bg: #0d1117;
  --table-stripe-bg: #161b22;
  --table-header-bg: #161b22;
  --blockquote-border: #30363d;
  --blockquote-text: #8b949e;
  --dropdown-bg: #161b22;
  --dropdown-hover-bg: #21262d;
}

/* ======= 1. 全局基础重置 (部分修改) ======= */
html {
  /* 确保 html 有足够高度，让 sticky 定位正常工作 */
  min-height: 100%;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  /* 确保 body 不阻止 sticky 定位 */
  overflow-x: hidden;
  overflow-y: visible;
  /* 确保 body 有足够高度，让 sticky 定位在页面底部也能正常工作 */
  min-height: 100vh;
  /* 移除 position: relative; 这里的 Canvas 不需要依赖 body 定位 */
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* ======= 2. 导航栏样式 (完全参考 axi404.top) ======= */
header {
  position: sticky;
  top: 16px;
  /* top-4 = 1rem = 16px */
  z-index: 100;
  margin-bottom: 48px;
  /* mb-12 = 3rem = 48px */
  padding: 0 16px;
  /* px-4 = 1rem = 16px */
  max-width: 1120px;
  /* max-w-[70rem] = 70 * 16px = 1120px */
  margin-left: auto;
  margin-right: auto;
  /* 确保 header 在页面底部也能正常显示 */
  align-self: start;
}

@media (min-width: 640px) {
  header {
    padding: 0 28px;
    /* sm:px-7 = 1.75rem = 28px */
  }
}

@media (min-width: 1024px) {
  header {
    padding: 0 40px;
    /* lg:px-10 = 2.5rem = 40px */
  }
}

.nav {
  max-width: 980px;
  margin: 0 auto;
  padding: 4px 24px;
  /* 初始 padding 很小 */
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  border: 1px solid transparent;
  border-radius: 12px;
  /* rounded-xl */
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: none;
}

/* 滚动时的导航栏样式 */
header.scrolled .nav {
  background: var(--nav-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-color: var(--border-light);
  border-radius: 16px;
  /* sm:rounded-2xl */
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
  padding-left: 6px;
  /* [&.not-top]:px-1.5 = 0.375rem = 6px */
  padding-right: 6px;
}

.nav {
  max-width: 1100px;
  margin: 0 auto;
  padding: 4px 32px;
  /* 初始 padding 增加 */
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: padding 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

header.scrolled .nav {
  padding: 6px 32px;
  /* 滚动时稍微增加 padding */
}

.nav-left a {
  font-weight: 600;
  font-size: 1.25em;
  /* text-xl */
  text-decoration: none;
  color: var(--text-primary);
  transition: margin-inline 0.3s ease;
  display: inline-block;
}

/* 滚动时 Logo 左边距增加（参考 group-[.not-top]:ms-2 sm:group-[.not-top]:ms-3） */
header.scrolled .nav-left a {
  margin-left: 8px;
  /* ms-2 = 0.5rem = 8px */
}

@media (min-width: 640px) {
  header.scrolled .nav-left a {
    margin-left: 12px;
    /* sm:ms-3 = 0.75rem = 12px */
  }
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  /* 增加间距让导航更分散 */
  transition: gap 0.3s ease;
}

/* 滚动时 gap 稍小但仍保持舒适 */
header.scrolled .nav-links {
  gap: 16px;
  /* 保持合适的间距 */
}

.nav-links a {
  padding: 8px 4px;
  /* 减少水平padding，让gap来控制间距 */
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  transition: color 0.2s ease;
  white-space: nowrap;
}

.nav-links a:hover {
  color: var(--text-link);
  /* hover:text-primary */
}

/* 下拉菜单样式 */
.nav-dropdown {
  position: relative;
  display: inline-block;
}

.nav-dropdown-trigger {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 8px 4px;
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  transition: color 0.2s ease;
  white-space: nowrap;
  cursor: pointer;
}

.nav-dropdown-trigger:hover {
  color: var(--text-link);
}

.nav-dropdown-trigger .dropdown-arrow {
  transition: transform 0.2s ease;
  margin-left: 2px;
}

.nav-dropdown:hover .dropdown-arrow {
  transform: rotate(180deg);
}

.nav-dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  margin-top: 4px;
  background: var(--dropdown-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  min-width: 120px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
  z-index: 1000;
  padding: 4px 0;
}

.nav-dropdown:hover .nav-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-dropdown-item {
  display: block;
  padding: 8px 16px;
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 400;
  transition: background-color 0.2s ease, color 0.2s ease;
  white-space: nowrap;
}

.nav-dropdown-item:hover {
  background-color: var(--dropdown-hover-bg);
  color: var(--text-link);
}

/* 主题切换按钮样式 - 与语言切换按钮保持一致 */
.theme-toggle {
  padding: 0;
  text-decoration: none;
  color: var(--text-primary);
  font-size: 12px;
  font-weight: 500;
  transition: background-color 0.2s ease, border-color 0.2s ease;
  white-space: nowrap;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  cursor: pointer;
  font-family: inherit;
  margin-left: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  min-width: 36px;
  height: 28px;
  box-sizing: border-box;
  flex-shrink: 0;
  vertical-align: middle;
}

.theme-toggle:hover {
  background: var(--dropdown-hover-bg);
  border-color: var(--border-color);
  color: var(--text-primary);
}

.theme-toggle:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(88, 166, 255, 0.1);
}

.theme-icon {
  transition: opacity 0.2s ease;
  flex-shrink: 0;
}

/* 语言切换按钮样式 - 根据文字内容自适应宽度（中文时窄、English 时宽） */
.lang-toggle {
  padding: 0 10px;
  text-decoration: none;
  color: var(--text-primary);
  font-size: 12px;
  font-weight: 500;
  transition: background-color 0.2s ease, border-color 0.2s ease;
  white-space: nowrap;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  cursor: pointer;
  font-family: inherit;
  margin-left: 16px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 28px;
  width: min-content;
  min-width: min-content;
  box-sizing: border-box;
  flex-shrink: 0;
  vertical-align: middle;
}

.lang-toggle:hover {
  background: var(--dropdown-hover-bg);
  border-color: var(--border-color);
  color: var(--text-primary);
}

.lang-toggle:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(88, 166, 255, 0.1);
}

.lang-toggle .lang-icon {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  color: var(--text-primary);
}

.lang-toggle .lang-text {
  color: var(--text-primary);
  font-weight: 500;
  font-size: 12px;
  flex-shrink: 0;
}

/* 移除当前页面链接的背景高亮，只保留悬停效果 */
/* 用户要求：点击其他标签页时不应该有蓝色背景，只有鼠标悬停时才显示蓝色 */

/* ======= 3. 内容容器样式 (用于列表页和文章页的居中) ======= */
/* 这里的 main 只包裹列表和文章，不包裹首页的左右分栏 */
.content-wrapper {
  max-width: 900px;
  /* 限制内容宽度 */
  margin: 32px auto 48px;
  /* 居中 */
  padding: 0 16px;
  /* 侧边留白 */
}

/* 文章页面布局：左右分栏（目录 + 内容） */
.article-wrapper {
  display: flex;
  max-width: 1200px;
  margin: 32px auto 48px;
  padding: 0 24px;
  gap: 32px;
  align-items: flex-start;
  overflow-x: visible !important;
  /* 确保目录的圆点可以超出边界显示 */
}

.article-content {
  flex: 1;
  min-width: 0;
  /* 防止 flex item 溢出 */
}

/* ... (上方的 body, header, nav 等样式保持不变) ... */

/* 2. 确保 Footer 具备定位上下文 */
footer {
  position: relative;
  /* 🌟 关键：提供定位上下文 */
  text-align: center;
  padding: 80px 0 24px;
  /* 顶部留出空间 */
  font-size: 12px;
  color: #57606a;
  margin-top: 20px;
  /* 减少顶部边距，让视觉上更融合 */
  background-color: transparent;
  /* 透明背景，和上面的内容区域保持一致 */
  z-index: 10;
  /* 移除顶部边框，消除颜色隔离感 */
}

/* 3. 定义新的 Canvas 容器样式 - 覆盖底部横线区域 */
#dino-canvas-container {
  position: absolute;
  top: 0;
  /* 紧贴 footer 顶部边缘 */
  left: 0;
  width: 100%;
  height: 60px;
  /* 动画区域高度，可根据您的需求调整 */
  pointer-events: none;
  /* 🌟 关键：不阻挡鼠标点击 footer 中的其他内容 */
  z-index: 1;
  /* 确保它在 footer 的文本内容之下 */
  overflow: hidden;
}

/* ======= 4. Typora GitHub 风格文章容器 (仅用于文章内容) ======= */
article.typora-github {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 48px;
  font-size: 16px;
  line-height: 1.6;
  word-wrap: break-word;
  /* 文章页不需要 max-width，因为它已经被 .content-wrapper 限制了 */
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

/* 列表页的基础样式 */
.list-title {
  font-size: 2em;
  font-weight: 600;
  margin-bottom: 10px;
}

.list-description {
  margin-bottom: 24px;
  color: var(--text-secondary);
}

.post-list {
  list-style: none;
  padding: 0;
}

.post-list li {
  padding: 10px 0;
  border-bottom: none;
}

.post-list a {
  font-size: 1.1em;
  font-weight: 500;
  color: var(--text-primary);
  text-decoration: none;
}

.post-list a:hover {
  color: var(--text-link);
  text-decoration: underline;
}


/* 移动端适配 */
@media (max-width: 1024px) {
  .article-wrapper {
    flex-direction: column;
    padding: 0 16px;
  }

  .article-content {
    width: 100%;
  }

  /* 导航栏移动端优化 */
  .nav {
    padding: 12px 16px;
  }

  .nav-links {
    gap: 4px;
  }

  .nav-links a {
    padding: 6px 10px;
    font-size: 13px;
  }
}

@media (max-width: 768px) {
  article.typora-github {
    padding: 24px 16px;
  }

  .content-wrapper {
    margin: 20px auto 30px;
  }

  .article-wrapper {
    margin: 20px auto 30px;
  }

  /* 导航栏小屏幕优化 */
  .nav {
    padding: 10px 16px;
    flex-wrap: wrap;
    gap: 8px;
  }

  .nav-left a {
    font-size: 1em;
  }

  .nav-links {
    gap: 2px;
    flex-wrap: wrap;
    justify-content: flex-end;
  }

  .nav-links a {
    padding: 5px 8px;
    font-size: 12px;
    margin-left: 0;
  }
}

/* ======= 5. Markdown 元素详情样式 ======= */

.typora-github h1,
.typora-github h2,
.typora-github h3,
.typora-github h4,
.typora-github h5,
.typora-github h6 {
  margin-top: 24px;
  margin-bottom: 16px;
  font-weight: 600 !important;
  /* 确保标题加粗 */
  line-height: 1.25;
  color: var(--text-primary);
  scroll-margin-top: 80px;
  /* 为固定导航栏留出空间 */
}

.typora-github h1 {
  font-size: 2em;
  padding-bottom: 0.3em;
  border-bottom: none;
}

.typora-github h2 {
  font-size: 1.5em;
  padding-bottom: 0.3em;
  border-bottom: none;
}

.typora-github h3 {
  font-size: 1.25em;
}

.typora-github h4 {
  font-size: 1em;
}

.typora-github p {
  margin-top: 0;
  margin-bottom: 16px;
}

/* 确保 strong 和 b 标签能够正常加粗显示 */
.typora-github strong,
.typora-github b,
article.typora-github strong,
article.typora-github b {
  font-weight: 600 !important;
  /* 确保加粗生效 */
  color: inherit;
}

/* 全局的 strong 和 b 标签样式（用于所有文章内容） */
article strong,
article b {
  font-weight: 600 !important;
  /* 确保加粗生效 */
  color: inherit;
}

/* Markdown 内部链接样式 - 区分锚点链接和外部链接 */

/* 锚点链接（目录链接）：浅灰色，无下划线 */
article.typora-github a[href^="#"],
.typora-github a[href^="#"] {
  color: #8590a6 !important;
  /* 默认浅灰色，类似知乎 */
  text-decoration: none !important;
  /* 没有下划线 */
  transition: color 0.2s;
}

article.typora-github a[href^="#"]:link,
article.typora-github a[href^="#"]:visited,
article.typora-github a[href^="#"]:active,
.typora-github a[href^="#"]:link,
.typora-github a[href^="#"]:visited,
.typora-github a[href^="#"]:active {
  color: #8590a6 !important;
  text-decoration: none !important;
}

article.typora-github a[href^="#"]:hover,
.typora-github a[href^="#"]:hover {
  color: #8590a6 !important;
  text-decoration: none !important;
}

/* 锚点链接激活状态：蓝色 */
article.typora-github a[href^="#"].active,
article.typora-github a[href^="#"].active:link,
article.typora-github a[href^="#"].active:visited,
article.typora-github a[href^="#"].active:hover,
article.typora-github a[href^="#"].active:active,
.typora-github a[href^="#"].active,
.typora-github a[href^="#"].active:link,
.typora-github a[href^="#"].active:visited,
.typora-github a[href^="#"].active:hover,
.typora-github a[href^="#"].active:active {
  color: #1890ff !important;
  font-weight: 500 !important;
  text-decoration: none !important;
}

/* 外部链接和文件链接（http/https/本地文件）：蓝色，无下划线 */
article.typora-github a[href^="http://"],
article.typora-github a[href^="https://"],
article.typora-github a[href^="//"],
article.typora-github a[href^="/"]:not([href^="#"]),
.typora-github a[href^="http://"],
.typora-github a[href^="https://"],
.typora-github a[href^="//"],
.typora-github a[href^="/"]:not([href^="#"]) {
  color: var(--text-link) !important;
  /* 蓝色 */
  text-decoration: none !important;
  /* 无下划线 */
  transition: color 0.2s;
}

article.typora-github a[href^="http://"]:link,
article.typora-github a[href^="http://"]:visited,
article.typora-github a[href^="https://"]:link,
article.typora-github a[href^="https://"]:visited,
article.typora-github a[href^="//"]:link,
article.typora-github a[href^="//"]:visited,
article.typora-github a[href^="/"]:not([href^="#"]):link,
article.typora-github a[href^="/"]:not([href^="#"]):visited,
.typora-github a[href^="http://"]:link,
.typora-github a[href^="http://"]:visited,
.typora-github a[href^="https://"]:link,
.typora-github a[href^="https://"]:visited,
.typora-github a[href^="//"]:link,
.typora-github a[href^="//"]:visited,
.typora-github a[href^="/"]:not([href^="#"]):link,
.typora-github a[href^="/"]:not([href^="#"]):visited {
  color: #0969da !important;
  text-decoration: none !important;
}

article.typora-github a[href^="http://"]:hover,
article.typora-github a[href^="https://"]:hover,
article.typora-github a[href^="//"]:hover,
article.typora-github a[href^="/"]:not([href^="#"]):hover,
.typora-github a[href^="http://"]:hover,
.typora-github a[href^="https://"]:hover,
.typora-github a[href^="//"]:hover,
.typora-github a[href^="/"]:not([href^="#"]):hover {
  color: var(--text-link-hover) !important;
  /* 悬停时稍深的蓝色 */
  text-decoration: none !important;
}

.typora-github ul,
.typora-github ol {
  margin-top: 0;
  margin-bottom: 16px;
  padding-left: 2em;
}

.typora-github li {
  margin: 0.25em 0;
}

.typora-github li>p {
  margin-top: 16px;
}

.typora-github blockquote {
  margin: 0 0 16px;
  padding: 0 1em;
  color: var(--blockquote-text);
  border-left: 0.25em solid var(--blockquote-border);
}

.typora-github blockquote> :first-child {
  margin-top: 0;
}

.typora-github blockquote> :last-child {
  margin-bottom: 0;
}

.typora-github table {
  display: block;
  width: 100%;
  overflow: auto;
  border-spacing: 0;
  border-collapse: collapse;
  margin-top: 0;
  margin-bottom: 16px;
}

.typora-github table th {
  font-weight: 600;
  background-color: var(--table-header-bg);
}

.typora-github table th,
.typora-github table td {
  padding: 6px 13px;
  border: 1px solid var(--border-color);
}

.typora-github table tr {
  background-color: var(--table-bg);
  border-top: 1px solid var(--border-color);
}

.typora-github table tr:nth-child(2n) {
  background-color: var(--table-stripe-bg);
}

.typora-github hr {
  height: 0.25em;
  padding: 0;
  margin: 24px 0;
  background-color: #e1e4e8;
  border: 0;
}

.typora-github img {
  max-width: 100%;
  box-sizing: border-box;
  background-color: #fff;
}

.typora-github :not(pre)>code {
  padding: 0.2em 0.4em;
  margin: 0;
  font-size: 85%;
  font-family: "Fira Code", ui-monospace, SFMono-Regular, SF Mono, Menlo, Consolas, Liberation Mono, monospace;
  background-color: var(--code-inline-bg);
  border-radius: 6px;
}

.typora-github pre {
  position: relative;
  padding: 16px;
  overflow: auto;
  font-size: 85%;
  line-height: 1.45;
  background-color: var(--code-bg);
  border-radius: 6px;
  margin-bottom: 16px;
  font-family: "Fira Code", ui-monospace, SFMono-Regular, SF Mono, Menlo, Consolas, Liberation Mono, monospace;
}

.typora-github pre code {
  background-color: transparent;
  padding: 0;
  margin: 0;
  border: 0;
  font-family: inherit;
  display: block;
  white-space: pre;
  overflow-x: auto;
}

.typora-github pre.astro-code {
  position: relative;
  padding: 16px;
  overflow: auto;
  font-size: 85%;
  line-height: 1.45;
  background-color: var(--code-bg);
  border-radius: 6px;
  margin-bottom: 16px;
  font-family: "Fira Code", ui-monospace, SFMono-Regular, SF Mono, Menlo, Consolas, Liberation Mono, monospace;
}

.typora-github pre.astro-code code {
  background-color: transparent;
  padding: 0;
  margin: 0;
  border: 0;
  font-family: inherit;
}

.code-copy {
  position: absolute;
  top: 8px;
  right: 8px;
  padding: 4px 8px;
  font-size: 12px;
  color: var(--text-secondary);
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.2s;
}

pre.astro-code:hover .code-copy {
  opacity: 1;
}

.code-copy:hover {
  background-color: var(--dropdown-hover-bg);
  color: var(--text-link);
}

/* 评论区域 */
.comment-section {
  margin-top: 60px;
  padding-top: 40px;
  border-top: 1px solid var(--border-color);
}

pre.astro-code::before {
  content: attr(data-language);
  position: absolute;
  top: 0;
  right: 0;
  padding: 2px 8px;
  font-size: 10px;
  color: #6e7781;
  text-transform: uppercase;
  display: none;
}