/* ============================================================
   LoveEleve's Tech Blog — 公共样式表 (Common CSS)
   
   设计原则：
   1. 单一 :root 变量块统一管理全站色彩体系
   2. 暗色模式通过 CSS 变量重定义，不依赖 !important
   3. 极简风格通过 [data-min-style] 属性变量重定义
   4. 页面特有样式由各 index.html 内联 <style> 注入
   5. 每个 section 之间用分隔注释标明定位
   ============================================================ */

/* ============================================================
   第 1 层：全局 CSS 变量（单一来源）
   ============================================================ */
:root {
  /* ----- 品牌 ----- */
  --theme-color: #42b983;
  --theme-color-dark: rgba(102, 219, 162, 0.95);

  /* ----- 布局 ----- */
  --content-max-width: 900px;
  --base-font-size: 13px;

  /* ----- 正文字体（页面可覆盖） ----- */
  --body-font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto,
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC",
    "Noto Sans", Arial, sans-serif;
  --code-font: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco,
    Consolas, "Liberation Mono", "Courier New", monospace;

  /* ----- 代码块 ----- */
  --code-border: rgba(0, 0, 0, 0.06);
  --code-toolbar-bg: #f6f8fa;
  --code-gutter-bg: #f6f8fa;
  --code-text: #24292f;
  --code-muted: #8b949e;
  --code-bg: #ffffff;

  /* ----- 卡片容器 ----- */
  --card-bg: #ffffff;
  --card-border: rgba(0, 0, 0, 0.08);
  --card-shadow: 0 1px 0 rgba(0, 0, 0, 0.02), 0 12px 28px rgba(0, 0, 0, 0.06);
  --card-shadow-hover: 0 1px 0 rgba(0, 0, 0, 0.02), 0 16px 34px rgba(0, 0, 0, 0.08);
  --card-head-bg: linear-gradient(180deg, rgba(246, 248, 250, 0.98), rgba(246, 248, 250, 0.92));
  --card-head-border: rgba(0, 0, 0, 0.06);

  /* ----- 悬浮按钮 ----- */
  --float-btn-bg: rgba(255, 255, 255, 0.86);
  --float-btn-border: rgba(0, 0, 0, 0.10);
  --float-btn-color: #111827;
  --float-btn-shadow: 0 10px 30px rgba(0, 0, 0, 0.10);
  --float-btn-backdrop: saturate(180%) blur(12px);

  /* ----- 主题色按钮 ----- */
  --accent-btn-bg: rgba(66, 185, 131, 0.08);
  --accent-btn-border: rgba(66, 185, 131, 0.22);
  --accent-btn-hover-bg: rgba(66, 185, 131, 0.14);
  --accent-btn-hover-border: rgba(66, 185, 131, 0.30);

  /* ----- 极简风格变量（被 [data-min-style] 覆盖） ----- */
  --min-font: var(--body-font);
  --min-mono: var(--code-font);
  --min-radius: 10px;
  --min-accent: #2563eb;
  --min-text: rgba(17, 24, 39, 0.92);
  --min-subtext: rgba(17, 24, 39, 0.62);
  --min-border: rgba(17, 24, 39, 0.14);
  --min-bg: #ffffff;
  --min-surface: #ffffff;
  --min-code-bg: rgba(17, 24, 39, 0.045);
  --min-shadow: none;
  --min-shadow-hover: none;
  --min-float-shadow: none;
  --min-float-shadow-hover: none;
}

/* ============================================================
    第 2 层：代码块（顶部工具栏 + 行级折叠）
    ============================================================ */
pre[data-lang] {
  position: relative !important;
  margin: 1.5em 0 !important;
  padding: 3.1em 0 0 !important;
  border-radius: 12px !important;
  border: 1px solid var(--code-border) !important;
  background: var(--code-bg) !important;
  overflow: hidden;
  box-shadow: var(--card-shadow);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

pre[data-lang]:hover {
  box-shadow: var(--card-shadow-hover);
}

pre[data-lang].is-collapsed {
  max-height: 44px !important;
  padding-bottom: 0 !important;
  cursor: pointer;
}

/* 代码块顶部工具栏 */
.code-tools {
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 32px;
  padding: 0 14px;
  background: var(--card-head-bg);
  border-bottom: 1px solid var(--card-head-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 10;
  user-select: none;
}

.code-tools-left {
  font-size: 11px;
  color: var(--code-muted);
  font-weight: 600;
  letter-spacing: 0.3px;
  display: flex;
  align-items: center;
}

.code-tools-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.tool-btn {
  font-size: 11px;
  color: var(--theme-color);
  cursor: pointer;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--accent-btn-border);
  background: var(--accent-btn-bg);
  transition: background 0.15s ease, border-color 0.15s ease, transform 0.15s ease;
  line-height: 1;
}

.tool-btn:hover {
  background: var(--accent-btn-hover-bg);
  border-color: var(--accent-btn-hover-border);
  transform: translateY(-1px);
}

.tool-btn:active {
  transform: translateY(0);
}

/* 禁用 docsify 自带复制按钮 */
.docsify-copy-code-button {
  display: none !important;
}

/* 行级折叠布局 */
.fold-wrap {
  display: flex;
  background: #fff;
}

.fold-gutter {
  flex: 0 0 28px;
  background: transparent;
  border-right: 1px solid rgba(0, 0, 0, 0.04);
  user-select: none;
  padding: 10px 0;
}

.fold-gutter-row {
  height: 1.55em;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  padding: 0 4px;
  gap: 4px;
}

.fold-toggle {
  width: 20px; height: 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border-radius: 6px;
  transition: background 0.15s ease;
  flex: 0 0 20px;
}
.fold-toggle:hover { background: var(--accent-btn-bg); }

.fold-toggle svg {
  width: 14px; height: 14px;
  fill: #8b949e;
  transition: transform 0.15s ease, fill 0.15s ease;
}
.fold-toggle:hover svg { fill: var(--theme-color); }
.fold-toggle.is-folded svg { transform: rotate(-90deg); }

.fold-code-scroll {
  flex: 1;
  overflow-x: auto;
  padding: 10px 0;
}

pre[data-lang][data-inline-fold-skipped="1"] > code {
  display: block;
  padding: 10px 14px;
  overflow-x: auto;
}

/* 折叠代码行 */
.fold-code-row {
  display: block;
  padding: 0 14px;
  white-space: pre;
  font-family: var(--code-font) !important;
  font-size: 13px;
  line-height: 1.55em;
  color: var(--code-text);
}
.fold-code-row.is-hidden { display: none; }

.fold-ellipsis {
  display: none;
  margin-left: 10px;
  padding: 0 8px;
  border-radius: 999px;
  background: var(--accent-btn-bg);
  color: var(--theme-color);
  font-size: 12px;
  cursor: pointer;
  user-select: none;
}
.fold-code-row.is-fold-head .fold-ellipsis { display: inline-block; }
.fold-code-row.is-fold-head { background: rgba(66, 185, 131, 0.04); }

/* Prism token 注释颜色 */
.fold-code-row .token.comment,
.fold-code-row .token.prolog,
.fold-code-row .token.doctype,
.fold-code-row .token.cdata { color: #999; }

/* 全局代码字体 */
code, pre, .token,
.markdown-section pre[data-lang] code,
.markdown-section pre[data-lang] .token {
  font-family: var(--code-font) !important;
}

/* ============================================================
   第 4 层：Tabs / Alerts / 图片缩放
   ============================================================ */
.markdown-section .docsify-tabs {
  margin: 14px 0;
  border-radius: 12px;
  border: 1px solid var(--card-border);
  background: var(--card-bg);
  overflow: hidden;
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.02);
}

.markdown-section .docsify-tabs__tab {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.4px;
}
.markdown-section .docsify-tabs__tab--active { color: var(--theme-color); }
.markdown-section .docsify-tabs__content { padding: 10px 12px 2px; }

/* Alerts */
.markdown-section .alert {
  margin: 14px 0;
  border-radius: 12px;
  border: 1px solid rgba(0, 0, 0, 0.10);
  background: var(--card-bg);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.02);
  overflow: hidden;
}

.markdown-section .alert .title {
  font-size: 11px;
  font-weight: 900;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  padding: 10px 12px;
  border-bottom: 1px solid var(--card-head-border);
  background: var(--card-head-bg);
}

.markdown-section .alert p,
.markdown-section .alert ul,
.markdown-section .alert ol { margin: 10px 12px; }

.markdown-section .alert.note,
.markdown-section .alert.info { border-left: 4px solid #2f81f7; }

.markdown-section .alert.tip,
.markdown-section .alert.success { border-left: 4px solid var(--theme-color); }

.markdown-section .alert.warning { border-left: 4px solid #d29922; }

.markdown-section .alert.danger,
.markdown-section .alert.error { border-left: 4px solid #cf222e; }

/* 图片缩放 */
.medium-zoom-overlay { z-index: 1000; }
.medium-zoom-image--opened {
  z-index: 1001;
  border-radius: 12px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
}
.markdown-section img {
  pointer-events: auto !important;
  cursor: zoom-in !important;
}
.markdown-section a > img { cursor: zoom-in !important; }

/* ============================================================
   第 5 层：giscus 评论区
   ============================================================ */
.markdown-section #giscus { margin-top: 28px; }

.markdown-section #giscus .giscus-card {
  border-radius: 12px;
  border: 1px solid var(--card-border);
  background: var(--card-bg);
  overflow: hidden;
  box-shadow: var(--card-shadow);
}

.markdown-section #giscus .giscus-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: var(--card-head-bg);
  border-bottom: 1px solid var(--card-head-border);
  backdrop-filter: saturate(180%) blur(10px);
  -webkit-backdrop-filter: saturate(180%) blur(10px);
}

.markdown-section #giscus .giscus-head-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.markdown-section #giscus .giscus-title {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  color: #1f2328;
}

.markdown-section #giscus .giscus-meta {
  font-size: 12px;
  color: var(--code-muted);
}

.markdown-section #giscus .giscus-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--accent-btn-border);
  background: var(--accent-btn-bg);
  color: var(--theme-color);
  font-size: 11px;
  font-weight: 700;
  line-height: 1;
  text-decoration: none;
}
.markdown-section #giscus .giscus-badge:hover {
  background: var(--accent-btn-hover-bg);
  border-color: var(--accent-btn-hover-border);
}

.markdown-section #giscus .giscus-body {
  padding: 12px 14px 16px;
}
.markdown-section #giscus .giscus-body:empty { display: none; }
.markdown-section .giscus-frame { width: 100%; }

/* ============================================================
   第 6 层：文章元信息卡片
   ============================================================ */
.page-meta-card {
  margin: 18px 0 18px;
  border-radius: 12px;
  border: 1px solid var(--card-border);
  background: var(--card-bg);
  overflow: hidden;
  box-shadow: var(--card-shadow);
}

.page-meta-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: var(--card-head-bg);
  border-bottom: 1px solid var(--card-head-border);
  backdrop-filter: saturate(180%) blur(10px);
  -webkit-backdrop-filter: saturate(180%) blur(10px);
}

.page-meta-title {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  color: #1f2328;
}

.page-meta-body {
  padding: 10px 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  color: #57606a;
  font-size: 13px;
  line-height: 1.6;
}

.page-meta-body b {
  color: #1f2328;
  font-weight: 800;
}

.page-meta-sep {
  opacity: 0.5;
  padding: 0 2px;
}

.page-tip {
  padding: 10px 14px;
  border-top: 1px dashed rgba(0, 0, 0, 0.10);
  background: rgba(66, 185, 131, 0.06);
  color: #1f2328;
  font-size: 13px;
}
.page-tip b { color: var(--theme-color); }

/* ============================================================
   第 7 层：右侧 TOC 目录
   ============================================================ */
.toc-aside {
  position: fixed;
  top: 86px;
  right: 18px;
  width: 260px;
  max-height: calc(100vh - 110px);
  overflow: auto;
  border-radius: 12px;
  border: 1px solid var(--card-border);
  background: var(--card-bg);
  box-shadow: var(--card-shadow);
  z-index: 20;
  display: none;
}

.toc-aside[data-has-items="0"] { display: none !important; }

.toc-head {
  position: sticky;
  top: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  background: var(--card-head-bg);
  border-bottom: 1px solid var(--card-head-border);
  backdrop-filter: saturate(180%) blur(10px);
  -webkit-backdrop-filter: saturate(180%) blur(10px);
}

.toc-title {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  color: #1f2328;
}

.toc-actions {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.toc-action {
  width: 30px; height: 30px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  border: 1px solid rgba(0, 0, 0, 0.08);
  background: rgba(255, 255, 255, 0.75);
  color: #57606a;
  cursor: pointer;
  line-height: 1;
  user-select: none;
  transition: transform 120ms ease, background 120ms ease, border-color 120ms ease, color 120ms ease, box-shadow 120ms ease;
}

.toc-icon { width: 16px; height: 16px; display: block; }

.toc-action:hover {
  transform: translateY(-1px);
  background: var(--accent-btn-bg);
  border-color: rgba(66, 185, 131, 0.26);
  color: #1f2328;
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.10);
}
.toc-action:active {
  transform: translateY(0);
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.08);
}
.toc-action.is-disabled {
  opacity: 0.42;
  filter: saturate(0.8);
  pointer-events: none;
  box-shadow: none;
}
.toc-action.is-hidden { display: none; }

.toc-close {
  width: 28px; height: 28px;
  display: none;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  border: 1px solid rgba(0, 0, 0, 0.08);
  background: rgba(255, 255, 255, 0.7);
  color: #57606a;
  cursor: pointer;
  font-size: 16px;
  line-height: 1;
  user-select: none;
}
.toc-close:hover {
  background: var(--accent-btn-bg);
  border-color: rgba(66, 185, 131, 0.22);
  color: #1f2328;
}

.toc-fab {
  position: fixed;
  right: 14px;
  bottom: 16px;
  z-index: 9998;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 10px 12px;
  border-radius: 999px;
  border: 1px solid var(--accent-btn-border);
  background: rgba(255, 255, 255, 0.92);
  color: #1f2328;
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  cursor: pointer;
  box-shadow: 0 10px 22px rgba(0, 0, 0, 0.10);
  backdrop-filter: saturate(180%) blur(10px);
  -webkit-backdrop-filter: saturate(180%) blur(10px);
}

.toc-body {
  padding: 10px 10px 12px;
  font-size: 12px;
  line-height: 1.55;
  color: #57606a;
}

.toc-body a {
  display: block;
  padding: 6px 8px;
  border-radius: 8px;
  color: inherit;
  text-decoration: none;
  border: 1px solid transparent;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.toc-body a:hover {
  background: var(--accent-btn-bg);
  border-color: rgba(66, 185, 131, 0.18);
  color: #1f2328;
}
.toc-body a.is-active {
  background: rgba(66, 185, 131, 0.12);
  border-color: rgba(66, 185, 131, 0.26);
  color: #1f2328;
  font-weight: 800;
}

/* TOC 分组折叠 */
.toc-group { margin: 2px 0 6px; }
.toc-group-head { display: flex; align-items: center; gap: 6px; }

.toc-group-toggle {
  width: 22px; height: 22px;
  border-radius: 8px;
  border: 1px solid rgba(0, 0, 0, 0.08);
  background: rgba(255, 255, 255, 0.6);
  color: inherit;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
}
.toc-group-toggle.is-hidden { visibility: hidden; pointer-events: none; }

.toc-caret {
  width: 14px; height: 14px;
  display: block;
  opacity: 0.8;
  transition: transform 120ms ease;
  transform: rotate(90deg);
}
.toc-group.is-collapsed .toc-caret { transform: none; }
.toc-group-link { flex: 1; min-width: 0; }

.toc-children {
  margin: 2px 0 0 4px;
  padding-left: 6px;
  border-left: 1px dashed rgba(0, 0, 0, 0.10);
}
.toc-group.is-collapsed .toc-children { display: none; }

.toc-l1 { padding-left: 0; font-weight: 900; }
.toc-l2 { padding-left: 0; font-weight: 600; }
.toc-l3 { padding-left: 6px; }
.toc-l4 { padding-left: 14px; opacity: 0.92; }

@media (min-width: 1024px) {
  .toc-aside { display: block; }
  body.has-toc-aside .content { padding-right: 300px; }
}

@media (max-width: 1023px) {
  .content { padding-right: 0; }
  .toc-aside {
    display: none;
    left: 12px; right: 12px;
    top: 74px;
    width: auto;
    max-height: calc(100vh - 96px);
    z-index: 9999;
  }
  .toc-aside.is-open { display: block; }
  .toc-close { display: inline-flex; }
  .toc-fab { display: inline-flex; }
  body:not(.has-toc-aside) .toc-fab {
    opacity: 0.55;
    border-color: rgba(0, 0, 0, 0.10);
    color: #57606a;
  }
  body.has-toc-aside .toc-fab { opacity: 1; }
}

/* ============================================================
   第 8 层：标题复制链接按钮
   ============================================================ */
.markdown-section h1,
.markdown-section h2,
.markdown-section h3,
.markdown-section h4 { scroll-margin-top: 90px; }

.heading-link-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-left: 8px;
  width: 24px; height: 24px;
  border-radius: 8px;
  border: 1px solid var(--accent-btn-border);
  background: var(--accent-btn-bg);
  color: var(--theme-color);
  cursor: pointer;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  vertical-align: middle;
  opacity: 0;
  transform: translateY(-1px);
  transition: opacity 0.15s ease, transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}
.heading-link-btn:hover,
.heading-link-btn:focus-visible {
  background: var(--accent-btn-hover-bg);
  border-color: var(--accent-btn-hover-border);
  transform: translateY(-1px);
}
.heading-link-btn.is-copied {
  background: rgba(66, 185, 131, 0.18);
  border-color: rgba(66, 185, 131, 0.38);
}

.markdown-section h1:hover .heading-link-btn,
.markdown-section h2:hover .heading-link-btn,
.markdown-section h3:hover .heading-link-btn,
.markdown-section h4:hover .heading-link-btn { opacity: 1; }

@media (hover: none) {
  .heading-link-btn { opacity: 0.85; }
}

/* ============================================================
   第 9 层：阅读体验增强（进度条 / 面包屑 / 上一篇下一篇）
   ============================================================ */
#read-progress {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  width: 0;
  background: var(--theme-color);
  z-index: 999;
  transition: width 0.08s linear;
}

.page-breadcrumb {
  margin: 10px 0 12px;
  font-size: 12px;
  line-height: 1.5;
  color: var(--code-muted);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}
.page-breadcrumb a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px dashed rgba(66, 185, 131, 0.25);
}
.page-breadcrumb a:hover {
  color: #1f2328;
  border-bottom-color: rgba(66, 185, 131, 0.55);
}
.page-breadcrumb .crumb-sep { opacity: 0.5; }

.page-nav {
  margin: 18px 0 26px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.page-nav a {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--card-border);
  background: var(--card-bg);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.02);
  text-decoration: none;
  color: #1f2328;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}
.page-nav a:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.06);
  border-color: var(--accent-btn-hover-border);
}
.page-nav .nav-kicker {
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  color: var(--code-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}
.page-nav .nav-title {
  font-size: 13px;
  font-weight: 800;
  color: #1f2328;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.page-nav .is-disabled {
  opacity: 0.45;
  pointer-events: none;
}

@media (max-width: 768px) {
  .page-nav { grid-template-columns: 1fr; }
}

/* ============================================================
   第 10 层：主题切换按钮
   ============================================================ */
.theme-toggle {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 1002;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  border-radius: 999px;
  border: 1px solid var(--float-btn-border);
  background: var(--float-btn-bg);
  color: var(--float-btn-color);
  box-shadow: var(--float-btn-shadow);
  cursor: pointer;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  backdrop-filter: var(--float-btn-backdrop);
  -webkit-backdrop-filter: var(--float-btn-backdrop);
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.6px;
}
.theme-toggle:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 38px rgba(0, 0, 0, 0.14);
  border-color: rgba(66, 185, 131, 0.28);
}
.theme-toggle:active { transform: translateY(0); }
.theme-toggle .theme-icon {
  width: 18px; height: 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  background: var(--accent-btn-bg);
  color: var(--theme-color);
  font-size: 14px;
  line-height: 1;
}
.theme-toggle .theme-text { opacity: 0.9; }

@media (max-width: 900px) {
  .theme-toggle { right: 12px; bottom: 12px; }
}

/* ============================================================
   第 11 层：全文搜索（Ctrl/⌘+K）
   ============================================================ */
.search-toggle {
  position: fixed;
  right: 18px;
  bottom: 78px;
  z-index: 1002;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  border-radius: 999px;
  border: 1px solid var(--float-btn-border);
  background: var(--float-btn-bg);
  color: var(--float-btn-color);
  box-shadow: var(--float-btn-shadow);
  cursor: pointer;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  backdrop-filter: var(--float-btn-backdrop);
  -webkit-backdrop-filter: var(--float-btn-backdrop);
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.6px;
}
.search-toggle:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 38px rgba(0, 0, 0, 0.14);
  border-color: rgba(66, 185, 131, 0.28);
}
.search-toggle:active { transform: translateY(0); }
.search-toggle .search-icon {
  width: 18px; height: 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  background: var(--accent-btn-bg);
  color: var(--theme-color);
}
.search-toggle .search-icon svg { width: 16px; height: 16px; display: block; }
.search-toggle .search-hint {
  opacity: 0.7;
  font-weight: 800;
  font-size: 11px;
  letter-spacing: 0.3px;
}

@media (max-width: 900px) {
  .search-toggle { right: 12px; bottom: 72px; }
  .search-toggle .search-hint { display: none; }
}

/* 搜索模态框 */
#fts-modal {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: none;
}
#fts-modal.is-open { display: block; }
#fts-modal .fts-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.45);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
#fts-modal .fts-panel {
  position: relative;
  width: min(760px, calc(100vw - 24px));
  margin: 92px auto 0;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid rgba(0, 0, 0, 0.10);
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.30);
  overflow: hidden;
}
#fts-modal .fts-head {
  padding: 12px 12px 10px;
  border-bottom: 1px solid var(--card-head-border);
  display: flex;
  gap: 10px;
  align-items: center;
}
#fts-modal .fts-input {
  flex: 1;
  height: 40px;
  border-radius: 10px;
  border: 1px solid rgba(0, 0, 0, 0.12);
  padding: 0 12px;
  outline: none;
  font-size: 14px;
  font-weight: 700;
  background: rgba(255, 255, 255, 0.9);
}
#fts-modal .fts-input:focus {
  border-color: rgba(66, 185, 131, 0.55);
  box-shadow: 0 0 0 3px rgba(66, 185, 131, 0.18);
}
#fts-modal .fts-close {
  width: 40px; height: 40px;
  border-radius: 10px;
  border: 1px solid rgba(0, 0, 0, 0.10);
  background: var(--accent-btn-bg);
  color: var(--theme-color);
  cursor: pointer;
  font-weight: 900;
  font-size: 16px;
}
#fts-modal .fts-close:hover {
  background: var(--accent-btn-hover-bg);
  border-color: var(--accent-btn-hover-border);
}
#fts-modal .fts-meta {
  padding: 8px 12px;
  font-size: 12px;
  color: rgba(17, 24, 39, 0.72);
  border-bottom: 1px solid var(--card-head-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
#fts-modal .fts-meta .fts-meta-right { display: flex; gap: 10px; align-items: center; }
#fts-modal .fts-link {
  color: rgba(66, 185, 131, 0.95);
  font-weight: 800;
  cursor: pointer;
  text-decoration: none;
}
#fts-modal .fts-link:hover { text-decoration: underline; }
#fts-modal .fts-results {
  max-height: min(62vh, 520px);
  overflow: auto;
  padding: 6px;
}
#fts-modal .fts-item {
  display: block;
  padding: 10px 10px;
  border-radius: 12px;
  border: 1px solid transparent;
  text-decoration: none;
  color: inherit;
}
#fts-modal .fts-item:hover {
  background: var(--accent-btn-bg);
  border-color: rgba(66, 185, 131, 0.22);
}
#fts-modal .fts-title {
  font-weight: 900;
  font-size: 13px;
  line-height: 1.35;
  color: #0f172a;
}
#fts-modal .fts-snippet {
  margin-top: 4px;
  font-size: 12px;
  line-height: 1.6;
  color: rgba(15, 23, 42, 0.78);
}
#fts-modal mark {
  background: rgba(250, 204, 21, 0.45);
  color: inherit;
  padding: 0 2px;
  border-radius: 4px;
}
.fts-mark {
  background: rgba(250, 204, 21, 0.45);
  border-radius: 4px;
  padding: 0 2px;
}

/* ============================================================
   第 12 层：暗色模式（通过 CSS 变量重定义）
   ============================================================ */
html[data-theme="dark"] {
  color-scheme: dark;

  /* 代码块变量 */
  --code-border: rgba(255, 255, 255, 0.10);
  --code-toolbar-bg: rgba(17, 24, 39, 0.92);
  --code-gutter-bg: rgba(17, 24, 39, 0.92);
  --code-text: rgba(226, 232, 240, 0.96);
  --code-muted: rgba(226, 232, 240, 0.62);
  --code-bg: rgba(2, 6, 23, 0.90);

  /* 卡片容器 */
  --card-bg: rgba(15, 23, 42, 0.92);
  --card-border: rgba(255, 255, 255, 0.10);
  --card-shadow: 0 1px 0 rgba(0, 0, 0, 0.20), 0 18px 40px rgba(0, 0, 0, 0.40);
  --card-shadow-hover: 0 1px 0 rgba(0, 0, 0, 0.22), 0 22px 48px rgba(0, 0, 0, 0.45);
  --card-head-bg: linear-gradient(180deg, rgba(15, 23, 42, 0.98), rgba(15, 23, 42, 0.92));
  --card-head-border: rgba(255, 255, 255, 0.08);

  /* 悬浮按钮 */
  --float-btn-bg: rgba(15, 23, 42, 0.72);
  --float-btn-border: rgba(255, 255, 255, 0.10);
  --float-btn-color: rgba(226, 232, 240, 0.92);
  --float-btn-shadow: 0 16px 45px rgba(0, 0, 0, 0.40);

  /* 极简变量 */
  --min-text: rgba(226, 232, 240, 0.92);
  --min-subtext: rgba(226, 232, 240, 0.66);
  --min-border: rgba(226, 232, 240, 0.14);
  --min-bg: #0a0c10;
  --min-surface: #0a0c10;
  --min-code-bg: rgba(226, 232, 240, 0.07);
}

/* 暗色模式下特定元素 */
html[data-theme="dark"] body {
  background: #0b1220;
  color: rgba(226, 232, 240, 0.92);
}

html[data-theme="dark"] .markdown-section { color: rgba(226, 232, 240, 0.92); }
html[data-theme="dark"] .markdown-section a { color: var(--theme-color-dark); }
html[data-theme="dark"] .markdown-section h1,
html[data-theme="dark"] .markdown-section h2,
html[data-theme="dark"] .markdown-section h3,
html[data-theme="dark"] .markdown-section h4 { color: rgba(226, 232, 240, 0.98); }

/* 暗色：giscus + page-nav 标题 */
html[data-theme="dark"] .markdown-section #giscus .giscus-title,
html[data-theme="dark"] .page-nav .nav-title { color: rgba(226, 232, 240, 0.96); }
html[data-theme="dark"] .page-nav a:hover {
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
}

/* 暗色：代码块折叠 */
html[data-theme="dark"] .fold-wrap { background: transparent; }
html[data-theme="dark"] .fold-gutter { border-right-color: rgba(255, 255, 255, 0.06); }
html[data-theme="dark"] .fold-code-row.is-fold-head { background: rgba(66, 185, 131, 0.08); }

/* 暗色：主题切换按钮 */
html[data-theme="dark"] .theme-toggle .theme-icon {
  background: rgba(66, 185, 131, 0.16);
  color: var(--theme-color-dark);
}

/* 暗色：搜索模态框 */
html[data-theme="dark"] .search-toggle {
  border-color: rgba(255, 255, 255, 0.10);
  background: rgba(15, 23, 42, 0.72);
  color: rgba(226, 232, 240, 0.92);
}
html[data-theme="dark"] #fts-modal .fts-panel {
  background: rgba(15, 23, 42, 0.92);
  border-color: rgba(255, 255, 255, 0.10);
}
html[data-theme="dark"] #fts-modal .fts-input {
  background: rgba(2, 6, 23, 0.66);
  border-color: rgba(255, 255, 255, 0.12);
  color: rgba(226, 232, 240, 0.92);
}
html[data-theme="dark"] #fts-modal .fts-meta {
  color: rgba(226, 232, 240, 0.70);
  border-bottom-color: rgba(255, 255, 255, 0.10);
}
html[data-theme="dark"] #fts-modal .fts-title { color: rgba(226, 232, 240, 0.96); }
html[data-theme="dark"] #fts-modal .fts-snippet { color: rgba(226, 232, 240, 0.72); }
html[data-theme="dark"] #fts-modal .fts-close {
  border-color: rgba(255, 255, 255, 0.10);
  background: rgba(66, 185, 131, 0.12);
  color: var(--theme-color-dark);
}

/* 暗色：TOC 按钮 */
html[data-theme="dark"] .toc-action,
html[data-theme="dark"] .toc-close {
  background: rgba(22, 27, 34, 0.72);
  border-color: rgba(255, 255, 255, 0.08);
  color: rgba(230, 237, 243, 0.78);
}
html[data-theme="dark"] .toc-action:hover,
html[data-theme="dark"] .toc-close:hover {
  background: var(--accent-btn-bg);
  border-color: rgba(66, 185, 131, 0.28);
  color: rgba(230, 237, 243, 0.92);
}
html[data-theme="dark"] .toc-group-toggle {
  background: rgba(22, 27, 34, 0.60);
  border-color: rgba(255, 255, 255, 0.10);
}
html[data-theme="dark"] .toc-children { border-left-color: rgba(255, 255, 255, 0.14); }

/* 暗色：标题链接按钮 */
html[data-theme="dark"] .heading-link-btn {
  border-color: rgba(102, 219, 162, 0.20);
  background: rgba(102, 219, 162, 0.10);
  color: var(--theme-color-dark);
}
html[data-theme="dark"] .heading-link-btn.is-copied {
  background: rgba(102, 219, 162, 0.18);
  border-color: rgba(102, 219, 162, 0.38);
}

/* ============================================================
   第 13 层：极简风格变量（Paper / Mono / Soft）
   ============================================================ */
html[data-min-style="paper"] {
  --min-accent: #b45309;
  --min-bg: #fbfbf7;
  --min-surface: #ffffff;
  --min-border: rgba(120, 53, 15, 0.18);
  --min-code-bg: rgba(120, 53, 15, 0.06);
}

html[data-min-style="mono"] {
  --min-accent: #2563eb;
  --min-bg: #ffffff;
  --min-surface: #ffffff;
  --min-border: rgba(17, 24, 39, 0.14);
  --min-code-bg: rgba(17, 24, 39, 0.045);
}

html[data-min-style="soft"] {
  --min-accent: #7c3aed;
  --min-bg: #f8f7ff;
  --min-surface: #ffffff;
  --min-border: rgba(30, 27, 75, 0.14);
  --min-code-bg: rgba(30, 27, 75, 0.05);
}

html[data-theme="dark"][data-min-style="paper"] {
  --min-accent: #f59e0b;
  --min-bg: #0b0f16;
  --min-surface: #0b0f16;
  --min-border: rgba(251, 191, 36, 0.18);
  --min-code-bg: rgba(251, 191, 36, 0.08);
}

html[data-theme="dark"][data-min-style="mono"] {
  --min-accent: #60a5fa;
  --min-bg: #0a0c10;
  --min-surface: #0a0c10;
  --min-border: rgba(226, 232, 240, 0.14);
  --min-code-bg: rgba(226, 232, 240, 0.07);
}

html[data-theme="dark"][data-min-style="soft"] {
  --min-accent: #c4b5fd;
  --min-bg: #0b0a16;
  --min-surface: #0b0a16;
  --min-border: rgba(196, 181, 253, 0.18);
  --min-code-bg: rgba(196, 181, 253, 0.09);
}

/* 极简风格：全局应用 */
body {
  background: var(--min-bg);
}

.markdown-section {
  color: var(--min-text);
  font-family: var(--min-font);
  line-height: 1.72;
  font-size: 14px;
  letter-spacing: 0.008em;
}

.markdown-section h1,
.markdown-section h2,
.markdown-section h3 { letter-spacing: -0.02em; }

.markdown-section blockquote {
  background: transparent;
  border-left-color: var(--min-border);
  color: var(--min-subtext);
}

.markdown-section a {
  color: var(--min-accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
.markdown-section a:hover { text-decoration: underline; }

.markdown-section code {
  font-family: var(--min-mono);
  font-size: 0.92em;
  background: var(--min-code-bg);
  border: 1px solid var(--min-border);
  border-radius: 7px;
  padding: 0.12em 0.35em;
}

/* 极简：卡片去阴影 */
.markdown-section .docsify-tabs,
.markdown-section .alert,
.markdown-section #giscus .giscus-card,
.toc-aside,
.page-nav a {
  box-shadow: var(--min-shadow);
  border-color: var(--min-border);
  border-radius: var(--min-radius);
}

.page-nav a:hover { box-shadow: var(--min-shadow-hover); transform: none; }

/* 极简：代码块 */
pre[data-lang] {
  background: var(--min-surface);
  border-color: var(--min-border);
  box-shadow: var(--min-shadow);
  padding: 3.0em 0 0;
  overflow: hidden;
}
pre[data-lang] code { background: transparent; border: 0; padding: 0; }
.fold-wrap { background: var(--min-code-bg); }
.fold-gutter { border-right-color: var(--min-border); }

/* 极简：悬浮按钮 */
.theme-toggle,
.search-toggle,
.style-toggle {
  background: var(--min-surface);
  border-color: var(--min-border);
  color: var(--min-text);
  box-shadow: var(--min-float-shadow);
  transform: none;
  transition: none;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}
.theme-toggle:hover,
.search-toggle:hover,
.style-toggle:hover,
.theme-toggle:active,
.search-toggle:active,
.style-toggle:active {
  box-shadow: var(--min-float-shadow-hover);
  transform: none;
}
.theme-toggle .theme-icon,
.style-toggle .style-icon { background: transparent; }

/* ============================================================
    第 14 层：隐藏 docsify-themeable app-name（防止 name 回退到 document.title）
    ============================================================ */
.app-name,
.app-name-link,
.app-sub-sidebar { display: none !important; }

/* ============================================================
    第 15 层：极简风格切换按钮
    ============================================================ */
.style-toggle {
  position: fixed;
  right: 18px;
  bottom: 138px;
  z-index: 1002;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  border-radius: 999px;
  border: 1px solid var(--min-border);
  cursor: pointer;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.4px;
}
@media (max-width: 900px) {
  .style-toggle { right: 12px; bottom: 124px; }
}
.style-toggle .style-icon {
  width: 18px; height: 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  font-size: 14px;
  line-height: 1;
}
.style-toggle .style-text { opacity: 0.9; }

/* ============================================================
    第 16 层：极简代码工具栏
    ============================================================ */
html[data-min-style] .code-tools {
  background: linear-gradient(180deg, rgba(250, 250, 250, 0.98), rgba(245, 245, 245, 0.92));
  border-bottom: 1px solid var(--min-border);
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}
html[data-theme="dark"][data-min-style] .code-tools {
  background: linear-gradient(180deg, rgba(30, 41, 59, 0.96), rgba(30, 41, 59, 0.86));
  border-bottom-color: rgba(255, 255, 255, 0.08);
}
html[data-min-style] .code-tools-left {
  color: var(--min-subtext);
}
html[data-min-style] .tool-btn {
  color: var(--min-text);
  border: 1px solid var(--min-border);
  background: rgba(255, 255, 255, 0.65);
  border-radius: 999px;
  transition: none;
  transform: none;
}
html[data-theme="dark"][data-min-style] .tool-btn {
  color: rgba(226, 232, 240, 0.92);
  border-color: rgba(255, 255, 255, 0.12);
  background: rgba(15, 23, 42, 0.35);
}
html[data-min-style] .tool-btn:hover,
html[data-min-style] .tool-btn:active {
  background: rgba(255, 255, 255, 0.92);
  transform: none;
}
html[data-theme="dark"][data-min-style] .tool-btn:hover,
html[data-theme="dark"][data-min-style] .tool-btn:active {
  background: rgba(15, 23, 42, 0.55);
}

/* ============================================================
   第 17 层：首页 Hero 区域 + 专栏列表
   ============================================================ */
.hero-section {
  text-align: center;
  padding: 60px 20px 50px;
  margin-bottom: 0;
  background: linear-gradient(135deg, #f0fdf4 0%, #ecfdf5 40%, #f8fafc 100%);
  border-bottom: 1px solid rgba(66, 185, 131, 0.12);
}

.hero-content { max-width: 680px; margin: 0 auto; }

.hero-title {
  font-size: 32px !important;
  font-weight: 900 !important;
  letter-spacing: -1px !important;
  color: #0f172a !important;
  margin: 0 0 14px !important;
  line-height: 1.25 !important;
}

.hero-slogan {
  font-size: 16px !important;
  color: #475569 !important;
  margin: 0 0 10px !important;
  font-weight: 400 !important;
}

.hero-desc {
  font-size: 13px !important;
  color: #94a3b8 !important;
  margin: 0 0 24px !important;
  font-weight: 500 !important;
}

.hero-social {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 18px;
}

.social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px; height: 38px;
  border-radius: 10px;
  border: 1px solid var(--card-border);
  background: rgba(255, 255, 255, 0.85);
  color: #334155;
  transition: all 0.2s ease;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}
.social-link:hover {
  background: var(--theme-color) !important;
  color: #fff !important;
  border-color: var(--theme-color) !important;
  box-shadow: 0 6px 16px rgba(66, 185, 131, 0.3);
  transform: translateY(-2px);
}

/* 首页专栏列表 */
.home-sections { padding: 10px 30px 40px; }

.home-section {
  margin: 6px 0;
  border-radius: 12px;
  border: 1px solid var(--card-border);
  background: var(--card-bg);
  overflow: hidden;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}
.home-section:hover {
  box-shadow: var(--card-shadow-hover);
  border-color: rgba(66, 185, 131, 0.22);
}

.home-section summary {
  padding: 16px 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  list-style: none;
  user-select: none;
  outline: none;
  background: linear-gradient(180deg, rgba(250, 250, 250, 0.98), rgba(245, 245, 245, 0.95));
  border-bottom: 1px solid transparent;
  transition: background 0.15s ease, border-bottom-color 0.15s ease;
}
.home-section[open] > summary {
  border-bottom-color: var(--card-border);
  background: var(--card-head-bg);
}

.home-section summary::-webkit-details-marker { display: none; }
.home-section summary::marker { content: ''; }

.section-title {
  font-size: 14px;
  font-weight: 800;
  color: #1e293b;
  letter-spacing: -0.02em;
}

.section-count {
  flex-shrink: 0;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.5px;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--accent-btn-bg);
  color: var(--theme-color);
  border: 1px solid var(--accent-btn-border);
}

.section-content {
  padding: 14px 20px 16px;
  font-size: 13px;
  line-height: 1.9;
  color: #475569;
}
.section-content em {
  display: block;
  padding: 8px 12px;
  margin: 4px 0;
  background: rgba(100, 116, 139, 0.06);
  border-radius: 8px;
  font-size: 12px;
  color: #64748b;
  font-style: normal;
  border-left: 3px solid var(--theme-color);
}

/* 更新徽章 */
.update-badge {
  text-align: center;
  padding: 28px 20px 36px;
  font-size: 13px;
  font-weight: 700;
  color: var(--theme-color);
  letter-spacing: 0.5px;
}
.update-icon { margin-right: 6px; }

/* 暗色模式：首页 */
html[data-theme="dark"] .hero-section {
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.95), rgba(17, 24, 39, 0.90));
  border-bottom-color: rgba(102, 219, 162, 0.08);
}
html[data-theme="dark"] .hero-title { color: rgba(230, 237, 243, 0.98) !important; }
html[data-theme="dark"] .hero-slogan { color: rgba(148, 163, 184, 0.88) !important; }
html[data-theme="dark"] .hero-desc { color: rgba(100, 116, 139, 0.70) !important; }
html[data-theme="dark"] .social-link {
  background: rgba(30, 41, 59, 0.72);
  color: rgba(203, 213, 225, 0.82);
  border-color: rgba(255, 255, 255, 0.06);
}
html[data-theme="dark"] .social-link:hover {
  background: var(--theme-color-dark) !important;
  color: #0a0c10 !important;
  border-color: var(--theme-color-dark) !important;
}

html[data-theme="dark"] .section-title { color: rgba(230, 237, 243, 0.94); }
html[data-theme="dark"] .section-content { color: rgba(148, 163, 184, 0.78); }
html[data-theme="dark"] .section-content em {
  background: rgba(51, 65, 85, 0.25);
  color: rgba(148, 163, 184, 0.68);
  border-left-color: var(--theme-color-dark);
}

html[data-theme="dark"] .home-section {
  border-color: rgba(255, 255, 255, 0.07);
  background: rgba(15, 23, 42, 0.92);
}
html[data-theme="dark"] .home-section summary {
  background: linear-gradient(180deg, rgba(22, 27, 34, 0.96), rgba(17, 24, 39, 0.93));
}
html[data-theme="dark"] .home-section[open] > summary {
  border-bottom-color: rgba(255, 255, 255, 0.06);
  background: var(--card-head-bg);
}