/* ============================================================
 * DocHub 文档阅读站主题 · 澄蓝（clear-blue-docs）
 * 结构：1 令牌 / 2 基础 / 3 页头 / 4 三栏骨架 / 5 文档目录树
 *       6 正文排版 / 7 本页目录 / 8 组件 / 9 首页与列表 / 10 响应式
 * 约定：类名前缀 dh-；页面样式只引用第 1 节令牌
 * ============================================================ */

/* ------------------------------------------------------------
 * 1. 设计令牌（改主题只改这里）
 * ---------------------------------------------------------- */
:root {
  /* 色彩 */
  --dh-color-primary: #1C5BC4;
  --dh-color-primary-dark: #14428F;
  --dh-color-primary-soft: #EBF1FC;
  --dh-color-text: #16191F;
  --dh-color-text-2: #4F5766;
  --dh-color-muted: #76808F;
  --dh-color-border: #E3E7ED;
  --dh-color-border-2: #C9D1DD;
  --dh-color-bg: #FFFFFF;
  --dh-color-bg-soft: #F6F8FB;
  --dh-color-code-bg: #F7F9FC;
  --dh-color-code-border: #E6EAF1;
  --dh-color-tip: #0E6B5C;
  --dh-color-tip-bg: #EDF7F3;
  --dh-color-tip-border: #C7E6DB;
  --dh-color-warn: #8A5200;
  --dh-color-warn-bg: #FDF6E8;
  --dh-color-warn-border: #F0DFBB;
  --dh-color-focus: #1C5BC4;

  /* 字体 */
  --dh-font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei",
    "Source Han Sans SC", "Noto Sans CJK SC", sans-serif;
  --dh-font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
    "Liberation Mono", "Noto Sans Mono CJK SC", monospace;
  --dh-text-h1: 34px;
  --dh-text-h2: 24px;
  --dh-text-h3: 19px;
  --dh-text-h4: 16.5px;
  --dh-text-body: 16px;
  --dh-text-sm: 14px;
  --dh-text-xs: 12.5px;
  --dh-leading-tight: 1.3;
  --dh-leading-body: 1.78;

  /* 间距 */
  --dh-space-1: 4px;
  --dh-space-2: 8px;
  --dh-space-3: 12px;
  --dh-space-4: 16px;
  --dh-space-5: 24px;
  --dh-space-6: 32px;
  --dh-space-7: 48px;
  --dh-space-8: 64px;

  /* 形状 */
  --dh-radius-sm: 4px;
  --dh-radius-md: 6px;
  --dh-radius-lg: 10px;
  --dh-radius-full: 999px;
  --dh-shadow-sm: 0 1px 2px rgba(22, 25, 31, .06);
  --dh-shadow-lg: 0 18px 48px rgba(22, 25, 31, .18);
  --dh-border: 1px;

  /* 布局 */
  --dh-container: 1440px;
  --dh-sidebar-w: 264px;
  --dh-toc-w: 220px;
  --dh-prose: 760px;
  --dh-header-h: 60px;
  --dh-tap: 44px;
  --dh-icon: 18px;

  /* 动效 */
  --dh-duration: 160ms;
  --dh-ease: cubic-bezier(.2, .7, .3, 1);

  /* 层级 */
  --dh-z-header: 50;
  --dh-z-drawer: 70;
  --dh-z-lightbox: 100;
}

/* ------------------------------------------------------------
 * 2. 基础
 * ---------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--dh-header-h) + var(--dh-space-4));
}

body {
  margin: 0;
  background: var(--dh-color-bg);
  color: var(--dh-color-text);
  font-family: var(--dh-font-sans);
  font-size: var(--dh-text-body);
  line-height: var(--dh-leading-body);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6, p, ul, ol, dl, figure, blockquote, pre, table {
  margin: 0;
}

ul, ol {
  padding: 0;
}

img, svg {
  display: block;
  max-width: 100%;
}

a {
  color: var(--dh-color-primary);
  text-decoration: none;
  text-underline-offset: 3px;
}

a:hover {
  color: var(--dh-color-primary-dark);
  text-decoration: underline;
}

button {
  font: inherit;
  color: inherit;
}

:focus-visible {
  outline: 2px solid var(--dh-color-focus);
  outline-offset: 2px;
  border-radius: 2px;
}

::selection {
  background: var(--dh-color-primary-soft);
  color: var(--dh-color-primary-dark);
}

hr {
  border: 0;
  border-top: var(--dh-border) solid var(--dh-color-border);
  margin: var(--dh-space-6) 0;
}

code, kbd, samp, pre {
  font-family: var(--dh-font-mono);
  font-size: .875em;
}

/* 跳转链接：键盘首次 Tab 可见 */
.dh-skip-link {
  position: fixed;
  top: var(--dh-space-2);
  left: var(--dh-space-2);
  z-index: calc(var(--dh-z-lightbox) + 1);
  padding: 10px 16px;
  background: var(--dh-color-bg);
  color: var(--dh-color-primary);
  border: var(--dh-border) solid var(--dh-color-primary);
  border-radius: var(--dh-radius-sm);
  font-size: var(--dh-text-sm);
  font-weight: 600;
  transform: translateY(-160%);
  transition: transform var(--dh-duration) var(--dh-ease);
}

.dh-skip-link:focus {
  transform: translateY(0);
}

.dh-visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.dh-icon {
  width: var(--dh-icon);
  height: var(--dh-icon);
  stroke: currentColor;
  stroke-width: 1.75;
  fill: none;
  flex: none;
}

/* ------------------------------------------------------------
 * 3. 页头（全站共用）
 * ---------------------------------------------------------- */
.dh-header {
  position: sticky;
  top: 0;
  z-index: var(--dh-z-header);
  height: var(--dh-header-h);
  background: var(--dh-color-bg);
  border-bottom: var(--dh-border) solid var(--dh-color-border);
}

.dh-header__inner {
  display: flex;
  align-items: center;
  gap: var(--dh-space-4);
  height: 100%;
  max-width: var(--dh-container);
  margin: 0 auto;
  padding: 0 var(--dh-space-5);
}

.dh-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 36px;
  color: var(--dh-color-text);
  font-weight: 650;
}

.dh-brand:hover {
  color: var(--dh-color-text);
  text-decoration: none;
}

.dh-brand__mark {
  width: 26px;
  height: 26px;
  color: var(--dh-color-primary);
  flex: none;
  transition: color var(--dh-duration) var(--dh-ease);
}

.dh-brand:hover .dh-brand__mark {
  color: var(--dh-color-primary-dark);
}

.dh-brand__name {
  font-size: 16.5px;
  letter-spacing: .01em;
  line-height: 1;
}

.dh-brand__sep {
  width: var(--dh-border);
  height: 16px;
  background: var(--dh-color-border-2);
}

.dh-brand__sub {
  font-size: 13.5px;
  font-weight: 500;
  color: var(--dh-color-text-2);
  line-height: 1;
}

.dh-version {
  padding: 2px 8px;
  border: var(--dh-border) solid #D7E3F8;
  border-radius: var(--dh-radius-full);
  background: var(--dh-color-primary-soft);
  color: var(--dh-color-primary-dark);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .02em;
  font-variant-numeric: tabular-nums;
}

.dh-header__nav {
  display: flex;
  align-items: center;
  gap: 2px;
  margin-left: auto;
}

.dh-header__link {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 var(--dh-space-3);
  border-radius: var(--dh-radius-sm);
  color: var(--dh-color-text-2);
  font-size: 14px;
  font-weight: 500;
}

.dh-header__link:hover {
  background: var(--dh-color-bg-soft);
  color: var(--dh-color-text);
  text-decoration: none;
}

.dh-header__link[aria-current="page"] {
  background: var(--dh-color-primary-soft);
  color: var(--dh-color-primary-dark);
  font-weight: 600;
}

.dh-header__actions {
  display: flex;
  align-items: center;
  gap: var(--dh-space-2);
  margin-left: var(--dh-space-2);
}

.dh-icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  border: var(--dh-border) solid var(--dh-color-border);
  border-radius: var(--dh-radius-sm);
  background: var(--dh-color-bg);
  color: var(--dh-color-text-2);
  cursor: pointer;
  transition: background-color var(--dh-duration) var(--dh-ease),
    border-color var(--dh-duration) var(--dh-ease),
    color var(--dh-duration) var(--dh-ease);
}

.dh-icon-btn:hover {
  background: var(--dh-color-bg-soft);
  border-color: var(--dh-color-border-2);
  color: var(--dh-color-text);
}

.dh-icon-btn[aria-expanded="true"] {
  background: var(--dh-color-primary-soft);
  border-color: #D7E3F8;
  color: var(--dh-color-primary-dark);
}

.dh-drawer-toggle {
  display: none;
}

/* ------------------------------------------------------------
 * 4. 三栏骨架
 * ---------------------------------------------------------- */
.dh-shell {
  display: grid;
  grid-template-columns: var(--dh-sidebar-w) minmax(0, 1fr);
  align-items: start;
  max-width: var(--dh-container);
  margin: 0 auto;
}

.dh-shell--article {
  grid-template-columns: var(--dh-sidebar-w) minmax(0, 1fr) var(--dh-toc-w);
}

.dh-main {
  min-width: 0;
  padding: var(--dh-space-6) var(--dh-space-6) var(--dh-space-8);
}

.dh-main--article {
  padding: var(--dh-space-6) var(--dh-space-7) var(--dh-space-8);
}

.dh-main__inner {
  max-width: 860px;
}

/* ------------------------------------------------------------
 * 5. 左侧文档目录（原生 details 折叠，手机端变抽屉）
 * ---------------------------------------------------------- */
.dh-sidebar {
  position: sticky;
  top: var(--dh-header-h);
  height: calc(100dvh - var(--dh-header-h));
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: var(--dh-space-5) var(--dh-space-4) var(--dh-space-7) var(--dh-space-5);
  border-right: var(--dh-border) solid var(--dh-color-border);
  scrollbar-width: thin;
  scrollbar-color: var(--dh-color-border-2) transparent;
}

.dh-sidebar::-webkit-scrollbar {
  width: 8px;
}

.dh-sidebar::-webkit-scrollbar-thumb {
  background: var(--dh-color-border-2);
  border-radius: var(--dh-radius-full);
}

.dh-sidebar__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--dh-space-2);
  margin-bottom: 2px;
}

.dh-sidebar__title {
  font-size: var(--dh-text-xs);
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--dh-color-muted);
}

.dh-sidebar__meta {
  margin-bottom: var(--dh-space-4);
  font-size: 12px;
  color: var(--dh-color-muted);
  font-variant-numeric: tabular-nums;
}

.dh-sidebar__close {
  display: none;
}

.dh-tree {
  font-size: 13.5px;
}

.dh-tree ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.dh-tree__group > summary,
.dh-tree__sub > summary {
  display: flex;
  align-items: center;
  gap: 6px;
  min-height: 32px;
  padding: 5px 6px;
  border-radius: var(--dh-radius-sm);
  color: var(--dh-color-text);
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  transition: background-color var(--dh-duration) var(--dh-ease);
}

.dh-tree__group > summary::-webkit-details-marker,
.dh-tree__sub > summary::-webkit-details-marker {
  display: none;
}

.dh-tree__group > summary:hover,
.dh-tree__sub > summary:hover {
  background: var(--dh-color-bg-soft);
}

.dh-tree__sub > summary {
  min-height: 30px;
  color: var(--dh-color-text-2);
  font-weight: 500;
}

.dh-tree__chev {
  width: 5px;
  height: 5px;
  margin-right: 2px;
  border-right: 1.5px solid var(--dh-color-muted);
  border-bottom: 1.5px solid var(--dh-color-muted);
  transform: rotate(-45deg);
  transition: transform var(--dh-duration) var(--dh-ease);
  flex: none;
}

.dh-tree details[open] > summary > .dh-tree__chev {
  transform: rotate(45deg);
}

.dh-tree__group > .dh-tree__list,
.dh-tree__sub > .dh-tree__list {
  margin-left: 8px;
  padding-left: 10px;
  border-left: var(--dh-border) solid var(--dh-color-border);
}

.dh-tree__sub {
  padding-top: 1px;
}

.dh-tree__sub > summary {
  padding-left: 4px;
}

.dh-tree__link {
  display: flex;
  align-items: center;
  min-height: 32px;
  margin-left: -1px;
  padding: 5px 8px 5px 9px;
  border-left: 2px solid transparent;
  border-radius: 0 var(--dh-radius-sm) var(--dh-radius-sm) 0;
  color: var(--dh-color-text-2);
  line-height: 1.5;
  overflow-wrap: anywhere;
  transition: background-color var(--dh-duration) var(--dh-ease),
    color var(--dh-duration) var(--dh-ease);
}

.dh-tree__link:hover {
  background: var(--dh-color-bg-soft);
  color: var(--dh-color-text);
  text-decoration: none;
}

.dh-tree__link[aria-current="page"] {
  border-left-color: var(--dh-color-primary);
  background: var(--dh-color-primary-soft);
  color: var(--dh-color-primary-dark);
  font-weight: 600;
}

.dh-tree__badge {
  margin-left: auto;
  padding-left: 8px;
  color: var(--dh-color-muted);
  font-size: 11px;
  font-weight: 500;
}

.dh-tree__note {
  margin-top: var(--dh-space-5);
  padding-top: var(--dh-space-4);
  border-top: var(--dh-border) solid var(--dh-color-border);
  font-size: 12px;
  line-height: 1.6;
  color: var(--dh-color-muted);
}

/* 抽屉遮罩：仅手机 + JS 时出现 */
.dh-backdrop {
  position: fixed;
  inset: 0;
  z-index: calc(var(--dh-z-drawer) - 1);
  background: rgba(22, 25, 31, .38);
  border: 0;
  padding: 0;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--dh-duration) var(--dh-ease),
    visibility var(--dh-duration) var(--dh-ease);
}

/* ------------------------------------------------------------
 * 6. 面包屑与正文排版
 * ---------------------------------------------------------- */
.dh-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin-bottom: var(--dh-space-4);
  font-size: var(--dh-text-xs);
  color: var(--dh-color-muted);
}

.dh-breadcrumb a {
  color: var(--dh-color-text-2);
}

.dh-breadcrumb a:hover {
  color: var(--dh-color-primary);
}

.dh-breadcrumb__sep {
  color: var(--dh-color-border-2);
}

.dh-breadcrumb [aria-current="page"] {
  color: var(--dh-color-text);
  font-weight: 500;
}

.dh-article-head {
  padding-bottom: var(--dh-space-5);
  margin-bottom: var(--dh-space-6);
  border-bottom: var(--dh-border) solid var(--dh-color-border);
}

.dh-article-head__kicker {
  margin-bottom: var(--dh-space-2);
  font-size: var(--dh-text-xs);
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--dh-color-primary);
}

.dh-article-title {
  font-size: 32px;
  font-weight: 680;
  line-height: 1.35;
  letter-spacing: -.005em;
  text-wrap: balance;
}

.dh-article-lede {
  max-width: 68ch;
  margin-top: var(--dh-space-3);
  color: var(--dh-color-text-2);
  font-size: 16px;
  line-height: 1.7;
}

.dh-article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 4px var(--dh-space-4);
  margin-top: var(--dh-space-4);
  color: var(--dh-color-muted);
  font-size: var(--dh-text-xs);
}

.dh-article-meta span {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.dh-article-meta .dh-icon {
  width: 14px;
  height: 14px;
}

.dh-prose {
  max-width: var(--dh-prose);
  font-size: var(--dh-text-body);
  line-height: var(--dh-leading-body);
  color: var(--dh-color-text);
  overflow-wrap: break-word;
}

.dh-prose > * + * {
  margin-top: var(--dh-space-4);
}

.dh-prose h2,
.dh-prose h3,
.dh-prose h4 {
  /* 锚点偏移统一由 html 的 scroll-padding-top 负责，这里不再重复设置，避免偏移翻倍 */
  font-weight: 650;
  line-height: var(--dh-leading-tight);
  color: var(--dh-color-text);
  text-wrap: balance;
}

.dh-prose h2 {
  margin-top: var(--dh-space-7);
  padding-bottom: var(--dh-space-2);
  border-bottom: var(--dh-border) solid var(--dh-color-border);
  font-size: var(--dh-text-h2);
  position: relative;
}

.dh-prose h3 {
  margin-top: var(--dh-space-6);
  font-size: var(--dh-text-h3);
}

.dh-prose h4 {
  margin-top: var(--dh-space-5);
  font-size: var(--dh-text-h4);
}

.dh-prose h2:first-child,
.dh-prose h3:first-child {
  margin-top: 0;
}

.dh-prose p {
  max-width: 74ch;
}

.dh-prose a {
  text-decoration: underline;
  text-decoration-color: #A9C2E8;
  text-decoration-thickness: 1px;
  overflow-wrap: anywhere;
}

.dh-prose a:hover {
  color: var(--dh-color-primary-dark);
  text-decoration-color: var(--dh-color-primary-dark);
}

.dh-prose strong {
  font-weight: 680;
  color: var(--dh-color-text);
}

.dh-anchor {
  margin-left: 8px;
  color: var(--dh-color-border-2);
  font-weight: 400;
  text-decoration: none;
  opacity: 0;
  transition: opacity var(--dh-duration) var(--dh-ease);
}

.dh-prose h2:hover .dh-anchor,
.dh-anchor:focus-visible {
  opacity: 1;
}

.dh-prose ul,
.dh-prose ol {
  padding-left: 1.4em;
}

.dh-prose li + li {
  margin-top: 6px;
}

.dh-prose li::marker {
  color: var(--dh-color-muted);
}

.dh-prose li > ul,
.dh-prose li > ol {
  margin-top: 6px;
}

.dh-prose code {
  padding: 2px 5px;
  border: var(--dh-border) solid var(--dh-color-code-border);
  border-radius: 3px;
  background: var(--dh-color-code-bg);
  color: #1F3B66;
  font-size: .86em;
  overflow-wrap: anywhere;
}

.dh-prose blockquote {
  padding: var(--dh-space-3) var(--dh-space-4);
  border: var(--dh-border) solid var(--dh-color-border);
  border-radius: var(--dh-radius-md);
  background: var(--dh-color-bg-soft);
  color: var(--dh-color-text-2);
  font-size: 15px;
}

.dh-prose blockquote p {
  max-width: 68ch;
}

.dh-prose blockquote cite {
  display: block;
  margin-top: var(--dh-space-2);
  color: var(--dh-color-muted);
  font-size: var(--dh-text-xs);
  font-style: normal;
}

/* ------------------------------------------------------------
 * 7. 本页目录（桌面右侧 / 移动端折叠）
 * ---------------------------------------------------------- */
.dh-toc {
  position: sticky;
  top: var(--dh-header-h);
  height: calc(100dvh - var(--dh-header-h));
  overflow-y: auto;
  padding: var(--dh-space-6) var(--dh-space-5) var(--dh-space-7) var(--dh-space-4);
  border-left: var(--dh-border) solid var(--dh-color-border);
  font-size: 13px;
  scrollbar-width: thin;
}

.dh-toc__title {
  margin-bottom: var(--dh-space-3);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--dh-color-muted);
}

.dh-toc__list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 1px;
  border-left: var(--dh-border) solid var(--dh-color-border);
}

.dh-toc__item + .dh-toc__item {
  margin-top: 1px;
}

.dh-toc__link {
  display: block;
  margin-left: -1px;
  padding: 4px 8px 4px 11px;
  border-left: 2px solid transparent;
  color: var(--dh-color-text-2);
  line-height: 1.5;
  overflow-wrap: anywhere;
}

.dh-toc__link:hover {
  color: var(--dh-color-primary);
  text-decoration: none;
}

.dh-toc__link[aria-current="true"] {
  border-left-color: var(--dh-color-primary);
  color: var(--dh-color-primary-dark);
  font-weight: 600;
}

.dh-toc__list--sub .dh-toc__link {
  padding-left: 22px;
  font-size: 12.5px;
  color: var(--dh-color-muted);
}

.dh-toc__list--sub .dh-toc__link[aria-current="true"] {
  color: var(--dh-color-primary-dark);
}

.dh-toc__empty {
  color: var(--dh-color-muted);
  font-size: 12.5px;
  line-height: 1.6;
}

.dh-toc__foot {
  margin-top: var(--dh-space-5);
  padding-top: var(--dh-space-4);
  border-top: var(--dh-border) solid var(--dh-color-border);
  font-size: 12.5px;
}

/* 移动端折叠版本页目录：桌面隐藏 */
.dh-toc-fold {
  display: none;
  margin-bottom: var(--dh-space-5);
  border: var(--dh-border) solid var(--dh-color-border);
  border-radius: var(--dh-radius-md);
  background: var(--dh-color-bg-soft);
}

.dh-toc-fold > summary {
  display: flex;
  align-items: center;
  gap: var(--dh-space-2);
  min-height: var(--dh-tap);
  padding: 0 var(--dh-space-4);
  font-size: var(--dh-text-sm);
  font-weight: 600;
  color: var(--dh-color-text-2);
  cursor: pointer;
  list-style: none;
}

.dh-toc-fold > summary::-webkit-details-marker {
  display: none;
}

.dh-toc-fold > summary .dh-tree__chev {
  margin-left: auto;
}

.dh-toc-fold[open] > summary .dh-tree__chev {
  transform: rotate(45deg);
}

.dh-toc-fold__body {
  padding: 0 var(--dh-space-4) var(--dh-space-3);
}

.dh-toc-fold .dh-toc__list {
  border-left: 0;
}

.dh-toc-fold .dh-toc__link {
  min-height: 36px;
  padding: 7px 0;
  border-left: 0;
  font-size: 13.5px;
}

.dh-toc-fold .dh-toc__link[aria-current="true"] {
  background: var(--dh-color-primary-soft);
  padding-left: 8px;
  border-radius: var(--dh-radius-sm);
}

/* ------------------------------------------------------------
 * 8. 组件：按钮 / 信息块 / 代码 / 表格 / 图片 / 灯箱 / 空状态
 * ---------------------------------------------------------- */
.dh-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--dh-space-2);
  min-height: 38px;
  padding: 0 var(--dh-space-4);
  border: var(--dh-border) solid var(--dh-color-border-2);
  border-radius: var(--dh-radius-sm);
  background: var(--dh-color-bg);
  color: var(--dh-color-text);
  font-size: 14.5px;
  font-weight: 550;
  line-height: 1;
  cursor: pointer;
  transition: background-color var(--dh-duration) var(--dh-ease),
    border-color var(--dh-duration) var(--dh-ease),
    color var(--dh-duration) var(--dh-ease);
}

.dh-btn:hover {
  border-color: var(--dh-color-primary);
  color: var(--dh-color-primary-dark);
  text-decoration: none;
}

.dh-btn--primary {
  border-color: var(--dh-color-primary);
  background: var(--dh-color-primary);
  color: #FFFFFF;
}

.dh-btn--primary:hover {
  border-color: var(--dh-color-primary-dark);
  background: var(--dh-color-primary-dark);
  color: #FFFFFF;
}

.dh-btn--quiet {
  border-color: transparent;
  background: transparent;
  color: var(--dh-color-primary);
  padding: 0 var(--dh-space-2);
}

.dh-btn--quiet:hover {
  background: var(--dh-color-primary-soft);
  border-color: transparent;
}

.dh-btn .dh-icon {
  width: 16px;
  height: 16px;
}

/* 信息块：提示 / 注意 */
.dh-callout {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-top: var(--dh-space-5);
  padding: var(--dh-space-3) var(--dh-space-4);
  border: var(--dh-border) solid;
  border-radius: var(--dh-radius-md);
  font-size: 14.5px;
  line-height: 1.72;
}

.dh-callout__icon {
  margin-top: 3px;
  width: 17px;
  height: 17px;
  stroke-width: 1.75;
  fill: none;
  flex: none;
}

.dh-callout__body {
  min-width: 0;
}

.dh-callout__body p {
  max-width: none;
}

.dh-callout__body > * + * {
  margin-top: var(--dh-space-2);
}

.dh-callout__title {
  font-weight: 650;
}

.dh-callout a {
  font-weight: 500;
}

.dh-callout--tip {
  border-color: var(--dh-color-tip-border);
  background: var(--dh-color-tip-bg);
  color: #14493F;
}

.dh-callout--tip .dh-callout__icon {
  color: var(--dh-color-tip);
}

.dh-callout--note {
  border-color: var(--dh-color-warn-border);
  background: var(--dh-color-warn-bg);
  color: #5C4009;
}

.dh-callout--note .dh-callout__icon {
  color: var(--dh-color-warn);
}

/* 代码块 */
.dh-code {
  margin-top: var(--dh-space-5);
  border: var(--dh-border) solid var(--dh-color-code-border);
  border-radius: var(--dh-radius-md);
  background: var(--dh-color-code-bg);
  overflow: hidden;
}

.dh-code__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--dh-space-3);
  padding: 5px 8px 5px var(--dh-space-4);
  border-bottom: var(--dh-border) solid var(--dh-color-code-border);
  background: var(--dh-color-bg-soft);
}

.dh-code__lang {
  font-family: var(--dh-font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--dh-color-muted);
}

.dh-code__copy {
  display: none;
  align-items: center;
  gap: 6px;
  min-height: 30px;
  padding: 0 10px;
  border: var(--dh-border) solid transparent;
  border-radius: var(--dh-radius-sm);
  background: transparent;
  color: var(--dh-color-text-2);
  font-size: 12px;
  cursor: pointer;
  transition: background-color var(--dh-duration) var(--dh-ease),
    color var(--dh-duration) var(--dh-ease);
}

.dh-js .dh-code__copy {
  display: inline-flex;
}

.dh-code__copy:hover {
  background: var(--dh-color-bg);
  border-color: var(--dh-color-border);
  color: var(--dh-color-text);
}

.dh-code__copy .dh-icon {
  width: 14px;
  height: 14px;
}

.dh-code__copy[data-copied="true"] {
  color: var(--dh-color-tip);
}

.dh-code pre {
  margin: 0;
  padding: var(--dh-space-4);
  overflow-x: auto;
  font-size: 13.5px;
  line-height: 1.7;
  tab-size: 2;
  -webkit-overflow-scrolling: touch;
}

.dh-code code {
  display: block;
  min-width: max-content;
  padding: 0;
  border: 0;
  background: none;
  color: #22262E;
  font-size: inherit;
  white-space: pre;
}

/* 手写的极简高亮，不引入高亮库 */
.tok-k { color: #14428F; font-weight: 600; }
.tok-s { color: #0E6B5C; }
.tok-c { color: #76808F; }
.tok-n { color: #8A5200; }
.tok-p { color: #3B4250; }

/* 表格：容器内横向滚动，不撑破正文 */
.dh-table-wrap {
  margin-top: var(--dh-space-5);
  border: var(--dh-border) solid var(--dh-color-border);
  border-radius: var(--dh-radius-md);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.dh-table {
  width: 100%;
  min-width: 720px;
  border-collapse: collapse;
  font-size: 13.5px;
  line-height: 1.6;
}

.dh-table th,
.dh-table td {
  padding: 10px var(--dh-space-3);
  border-bottom: var(--dh-border) solid var(--dh-color-border);
  text-align: left;
  vertical-align: top;
}

.dh-table th {
  background: var(--dh-color-bg-soft);
  color: var(--dh-color-text);
  font-weight: 650;
  white-space: nowrap;
}

.dh-table tbody tr:last-child td {
  border-bottom: 0;
}

.dh-table tbody tr:hover {
  background: #FBFCFE;
}

.dh-table code {
  white-space: nowrap;
}

.dh-table__caption {
  margin-top: var(--dh-space-2);
  color: var(--dh-color-muted);
  font-size: var(--dh-text-xs);
}

/* 图片 */
.dh-figure {
  margin-top: var(--dh-space-6);
}

.dh-figure__frame {
  position: relative;
  display: block;
  border: var(--dh-border) solid var(--dh-color-border);
  border-radius: var(--dh-radius-md);
  background: var(--dh-color-bg);
  overflow: hidden;
  cursor: zoom-in;
  transition: border-color var(--dh-duration) var(--dh-ease);
}

.dh-figure__frame:hover {
  border-color: var(--dh-color-primary);
  text-decoration: none;
}

.dh-figure__frame img {
  width: 100%;
  height: auto;
}

.dh-figure__zoom {
  position: absolute;
  right: 10px;
  bottom: 10px;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 8px;
  border: var(--dh-border) solid var(--dh-color-border);
  border-radius: var(--dh-radius-sm);
  background: rgba(255, 255, 255, .94);
  color: var(--dh-color-text-2);
  font-size: 11.5px;
}

.dh-figure__zoom .dh-icon {
  width: 13px;
  height: 13px;
}

.dh-figure figcaption {
  margin-top: var(--dh-space-2);
  color: var(--dh-color-muted);
  font-size: var(--dh-text-xs);
  line-height: 1.65;
}

.dh-figure figcaption b {
  color: var(--dh-color-text-2);
  font-weight: 600;
}

/* 图片灯箱 */
.dh-lightbox {
  width: min(1080px, 92vw);
  max-width: none;
  max-height: 92dvh;
  padding: 0;
  border: var(--dh-border) solid var(--dh-color-border);
  border-radius: var(--dh-radius-lg);
  background: var(--dh-color-bg);
  box-shadow: var(--dh-shadow-lg);
  overflow: hidden;
}

.dh-lightbox[open] {
  display: flex;
  flex-direction: column;
}

.dh-lightbox::backdrop {
  background: rgba(16, 19, 24, .72);
}

.dh-lightbox__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--dh-space-3);
  padding: 6px 8px 6px var(--dh-space-4);
  border-bottom: var(--dh-border) solid var(--dh-color-border);
}

.dh-lightbox__caption {
  min-width: 0;
  font-size: var(--dh-text-xs);
  color: var(--dh-color-text-2);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.dh-lightbox__body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 0;
  padding: var(--dh-space-3);
  background: var(--dh-color-bg-soft);
  overflow: auto;
}

.dh-lightbox__img {
  width: auto;
  max-width: 100%;
  max-height: calc(92dvh - 76px);
  object-fit: contain;
  background: var(--dh-color-bg);
}

/* 作者预览提示条（默认 hidden） */
.dh-preview-bar {
  display: flex;
  align-items: flex-start;
  gap: var(--dh-space-2);
  padding: 9px var(--dh-space-5);
  border-bottom: var(--dh-border) solid var(--dh-color-warn-border);
  background: var(--dh-color-warn-bg);
  color: #5C4009;
  font-size: 13px;
  line-height: 1.6;
}

.dh-preview-bar .dh-icon {
  margin-top: 2px;
  color: var(--dh-color-warn);
}

.dh-preview-bar__label {
  font-weight: 650;
  margin-right: 4px;
}

.dh-preview-bar__inner {
  display: flex;
  align-items: flex-start;
  gap: var(--dh-space-2);
  max-width: var(--dh-container);
  margin: 0 auto;
  width: 100%;
}

[hidden] {
  display: none !important;
}

/* 空状态 */
.dh-empty {
  padding: var(--dh-space-7) var(--dh-space-5);
  border: 1px dashed var(--dh-color-border-2);
  border-radius: var(--dh-radius-md);
  background: var(--dh-color-bg-soft);
  text-align: center;
}

.dh-empty__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  margin-bottom: var(--dh-space-3);
  border: var(--dh-border) solid var(--dh-color-border);
  border-radius: var(--dh-radius-md);
  background: var(--dh-color-bg);
  color: var(--dh-color-muted);
}

.dh-empty__title {
  font-size: 17px;
  font-weight: 650;
  line-height: 1.4;
}

.dh-empty__desc {
  max-width: 52ch;
  margin: var(--dh-space-2) auto 0;
  color: var(--dh-color-text-2);
  font-size: var(--dh-text-sm);
  line-height: 1.7;
}

.dh-empty__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--dh-space-2);
  margin-top: var(--dh-space-5);
}

.dh-empty--compact {
  padding: var(--dh-space-5) var(--dh-space-4);
  text-align: left;
}

.dh-empty--compact .dh-empty__desc {
  margin-left: 0;
}

.dh-empty--compact .dh-empty__actions {
  justify-content: flex-start;
}

/* 返回顶部 */
.dh-to-top {
  position: fixed;
  right: var(--dh-space-5);
  bottom: var(--dh-space-5);
  z-index: calc(var(--dh-z-header) - 5);
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: var(--dh-border) solid var(--dh-color-border-2);
  border-radius: var(--dh-radius-sm);
  background: var(--dh-color-bg);
  color: var(--dh-color-text-2);
  box-shadow: var(--dh-shadow-sm);
  cursor: pointer;
}

.dh-to-top:hover {
  border-color: var(--dh-color-primary);
  color: var(--dh-color-primary);
}

/* 页脚 */
.dh-footer {
  border-top: var(--dh-border) solid var(--dh-color-border);
  background: var(--dh-color-bg-soft);
}

.dh-footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--dh-space-5) var(--dh-space-7);
  max-width: var(--dh-container);
  margin: 0 auto;
  padding: var(--dh-space-6) var(--dh-space-5);
  font-size: 13px;
  color: var(--dh-color-text-2);
}

.dh-footer__brand {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.dh-footer__name {
  display: flex;
  align-items: center;
  gap: var(--dh-space-2);
  font-weight: 650;
  color: var(--dh-color-text);
}

.dh-footer__name .dh-brand__mark {
  width: 18px;
  height: 18px;
}

.dh-footer__note {
  max-width: 48ch;
  color: var(--dh-color-muted);
  font-size: 12px;
  line-height: 1.65;
}

.dh-footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 2px var(--dh-space-5);
  align-items: center;
}

.dh-footer__links a,
.dh-footer__demo {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  color: var(--dh-color-text-2);
  font-size: 13px;
}

.dh-footer__demo {
  padding: 0;
  border: 0;
  background: none;
  cursor: pointer;
  text-decoration: underline;
  text-decoration-color: var(--dh-color-border-2);
  text-underline-offset: 3px;
}

.dh-footer__demo:hover {
  color: var(--dh-color-primary);
}

.dh-footer__bottom {
  border-top: var(--dh-border) solid var(--dh-color-border);
  font-size: 12px;
  color: var(--dh-color-muted);
}

.dh-footer__bottom-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--dh-space-2) var(--dh-space-4);
  max-width: var(--dh-container);
  margin: 0 auto;
  /* 右侧留出 48px，给固定定位的「回到顶部」按钮让位，避免压住版权文字 */
  padding: var(--dh-space-3) calc(var(--dh-space-5) + 48px) var(--dh-space-3) var(--dh-space-5);
}

/* ------------------------------------------------------------
 * 9. 首页与列表页
 * ---------------------------------------------------------- */
.dh-page-head {
  padding-bottom: var(--dh-space-5);
  border-bottom: var(--dh-border) solid var(--dh-color-border);
}

.dh-page-head__eyebrow {
  margin-bottom: var(--dh-space-2);
  font-size: var(--dh-text-xs);
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--dh-color-primary);
}

.dh-page-title {
  font-size: var(--dh-text-h1);
  font-weight: 680;
  line-height: 1.32;
  letter-spacing: -.005em;
  text-wrap: balance;
}

.dh-page-lede {
  max-width: 70ch;
  margin-top: var(--dh-space-3);
  color: var(--dh-color-text-2);
  font-size: var(--dh-text-body);
  line-height: 1.72;
}

.dh-page-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 4px var(--dh-space-4);
  margin-top: var(--dh-space-4);
  color: var(--dh-color-muted);
  font-size: var(--dh-text-xs);
  font-variant-numeric: tabular-nums;
}

.dh-page-meta span {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.dh-page-meta .dh-icon {
  width: 14px;
  height: 14px;
}

/* 首页导语：文档站入口，不做营销 hero */
.dh-intro {
  padding-bottom: var(--dh-space-6);
  border-bottom: var(--dh-border) solid var(--dh-color-border);
}

.dh-intro__brand {
  display: flex;
  align-items: center;
  gap: var(--dh-space-3);
}

.dh-intro__mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 8px;
  border: var(--dh-border) solid #D7E3F8;
  border-radius: var(--dh-radius-md);
  background: var(--dh-color-primary-soft);
  color: var(--dh-color-primary);
  flex: none;
}

.dh-intro__title {
  font-size: var(--dh-text-h1);
  font-weight: 680;
  line-height: 1.25;
  letter-spacing: -.01em;
}

.dh-intro__sub {
  margin-top: 2px;
  color: var(--dh-color-muted);
  font-size: var(--dh-text-xs);
}

.dh-intro__lede {
  max-width: 66ch;
  margin-top: var(--dh-space-4);
  color: var(--dh-color-text-2);
  font-size: 16.5px;
  line-height: 1.72;
}

.dh-intro__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--dh-space-2);
  margin-top: var(--dh-space-5);
}

.dh-intro__hint {
  margin-top: var(--dh-space-3);
  color: var(--dh-color-muted);
  font-size: var(--dh-text-xs);
}

/* 三个快速入口：一条横向分区，不做卡片墙 */
.dh-quick {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: var(--dh-space-5);
  border: var(--dh-border) solid var(--dh-color-border);
  border-radius: var(--dh-radius-md);
  overflow: hidden;
}

.dh-quick__item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: var(--dh-space-4);
  border-right: var(--dh-border) solid var(--dh-color-border);
  color: var(--dh-color-text);
  background: var(--dh-color-bg);
  transition: background-color var(--dh-duration) var(--dh-ease);
}

.dh-quick__item:last-child {
  border-right: 0;
}

.dh-quick__item:hover {
  background: var(--dh-color-bg-soft);
  text-decoration: none;
}

.dh-quick__label {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--dh-color-primary);
  font-size: 11.5px;
  font-weight: 650;
  letter-spacing: .04em;
}

.dh-quick__label .dh-icon {
  width: 14px;
  height: 14px;
}

.dh-quick__title {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
}

.dh-quick__desc {
  color: var(--dh-color-muted);
  font-size: 12.5px;
  line-height: 1.6;
}

.dh-section {
  margin-top: var(--dh-space-7);
}

.dh-section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--dh-space-2) var(--dh-space-4);
  padding-bottom: var(--dh-space-3);
  border-bottom: var(--dh-border) solid var(--dh-color-border);
}

.dh-section__title {
  font-size: 20px;
  font-weight: 650;
  line-height: 1.4;
}

.dh-section__hint {
  color: var(--dh-color-muted);
  font-size: var(--dh-text-xs);
  font-variant-numeric: tabular-nums;
}

/* 首页目录分组 */
.dh-cats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 var(--dh-space-6);
}

.dh-cat {
  padding: var(--dh-space-4) 0 var(--dh-space-5);
  border-bottom: var(--dh-border) solid var(--dh-color-border);
}

.dh-cat__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--dh-space-3);
}

.dh-cat__title {
  display: flex;
  align-items: baseline;
  gap: var(--dh-space-2);
  font-size: 16px;
  font-weight: 650;
  line-height: 1.5;
}

.dh-cat__index {
  color: var(--dh-color-border-2);
  font-family: var(--dh-font-mono);
  font-size: 12px;
  font-weight: 500;
}

.dh-cat__count {
  color: var(--dh-color-muted);
  font-size: 11.5px;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.dh-cat__list {
  list-style: none;
  margin-top: var(--dh-space-1);
}

.dh-cat__link {
  display: flex;
  align-items: center;
  gap: var(--dh-space-2);
  min-height: 32px;
  padding: 3px 0;
  color: var(--dh-color-text-2);
  font-size: 14px;
  line-height: 1.55;
}

.dh-cat__link:hover {
  color: var(--dh-color-primary);
  text-decoration: none;
}

.dh-cat__link .dh-icon {
  width: 13px;
  height: 13px;
  color: var(--dh-color-border-2);
}

.dh-cat__more {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  min-height: 32px;
  margin-top: var(--dh-space-1);
  font-size: 12.5px;
  color: var(--dh-color-primary);
}

/* 演示标签：标明页面内同时展示的两种数据状态 */
.dh-demo-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-bottom: var(--dh-space-3);
  padding: 2px 8px;
  border: var(--dh-border) solid var(--dh-color-border);
  border-radius: var(--dh-radius-full);
  background: var(--dh-color-bg-soft);
  color: var(--dh-color-muted);
  font-size: 11.5px;
  letter-spacing: .02em;
}

/* 列表页：子目录 */
.dh-dir-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 var(--dh-space-6);
  margin-top: var(--dh-space-3);
}

.dh-dir {
  display: flex;
  align-items: flex-start;
  gap: var(--dh-space-3);
  padding: var(--dh-space-3) var(--dh-space-2) var(--dh-space-3) 0;
  border-top: var(--dh-border) solid var(--dh-color-border);
  color: var(--dh-color-text);
  transition: background-color var(--dh-duration) var(--dh-ease);
}

.dh-dir:hover {
  background: var(--dh-color-bg-soft);
  text-decoration: none;
}

.dh-dir__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border: var(--dh-border) solid var(--dh-color-border);
  border-radius: var(--dh-radius-sm);
  color: var(--dh-color-primary);
  flex: none;
}

.dh-dir__icon .dh-icon {
  width: 16px;
  height: 16px;
}

.dh-dir__body {
  min-width: 0;
}

.dh-dir__name {
  font-size: 14.5px;
  font-weight: 600;
  line-height: 1.5;
}

.dh-dir:hover .dh-dir__name {
  color: var(--dh-color-primary);
}

.dh-dir__desc {
  margin-top: 2px;
  color: var(--dh-color-text-2);
  font-size: 12.5px;
  line-height: 1.6;
}

.dh-dir__meta {
  margin-top: 3px;
  color: var(--dh-color-muted);
  font-size: 11.5px;
  font-variant-numeric: tabular-nums;
}

/* 列表页：文章列表（两种样式） */
.dh-doclist {
  list-style: none;
  border-top: var(--dh-border) solid var(--dh-color-border);
}

.dh-doclist__item {
  border-bottom: var(--dh-border) solid var(--dh-color-border);
}

.dh-doclist__link {
  display: block;
  padding: var(--dh-space-4) var(--dh-space-2) var(--dh-space-4) 0;
  color: var(--dh-color-text);
}

.dh-doclist__link:hover {
  background: var(--dh-color-bg-soft);
  text-decoration: none;
}

.dh-doclist__title {
  display: flex;
  align-items: baseline;
  gap: var(--dh-space-2);
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.5;
}

.dh-doclist__link:hover .dh-doclist__title {
  color: var(--dh-color-primary);
}

.dh-doclist__path {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 3px;
  margin-top: 3px;
  color: var(--dh-color-muted);
  font-size: 11.5px;
  line-height: 1.6;
}

.dh-doclist__desc {
  max-width: 74ch;
  margin-top: 4px;
  color: var(--dh-color-text-2);
  font-size: 13.5px;
  line-height: 1.65;
}

.dh-doclist__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 4px var(--dh-space-3);
  margin-top: 5px;
  color: var(--dh-color-muted);
  font-size: 11.5px;
  font-variant-numeric: tabular-nums;
}

.dh-doclist__meta span {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.dh-doclist__meta .dh-icon {
  width: 12px;
  height: 12px;
}

/* 紧凑列表：只有标题、路径与更新时间 */
.dh-doclist--compact .dh-doclist__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--dh-space-4);
  padding: var(--dh-space-2) var(--dh-space-2) var(--dh-space-2) 0;
}

.dh-doclist--compact .dh-doclist__main {
  min-width: 0;
}

.dh-doclist--compact .dh-doclist__title {
  font-size: 14.5px;
}

.dh-doclist--compact .dh-doclist__path {
  margin-top: 2px;
}

.dh-doclist--compact .dh-doclist__time {
  flex: none;
  color: var(--dh-color-muted);
  font-size: 11.5px;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.dh-demo-block {
  margin-top: var(--dh-space-7);
}

.dh-demo-block__note {
  max-width: 74ch;
  margin-top: var(--dh-space-3);
  color: var(--dh-color-muted);
  font-size: 12px;
  line-height: 1.65;
}

/* ------------------------------------------------------------
 * 10. 响应式（断点 1280 / 1024 / 768；375 为验收下限）
 * ---------------------------------------------------------- */
@media (max-width: 1280px) {
  :root {
    --dh-sidebar-w: 244px;
    --dh-toc-w: 208px;
  }

  .dh-main {
    padding: var(--dh-space-5) var(--dh-space-6) var(--dh-space-7);
  }

  .dh-main--article {
    padding: var(--dh-space-5) var(--dh-space-6) var(--dh-space-7);
  }
}

@media (max-width: 1024px) {
  .dh-shell--article {
    grid-template-columns: var(--dh-sidebar-w) minmax(0, 1fr);
  }

  .dh-toc {
    display: none;
  }

  .dh-toc-fold {
    display: block;
  }
}

@media (max-width: 768px) {
  :root {
    --dh-header-h: 56px;
    --dh-text-h1: 27px;
    --dh-text-h2: 21px;
    --dh-text-h3: 17.5px;
  }

  .dh-header__inner {
    gap: var(--dh-space-2);
    padding: 0 var(--dh-space-4);
  }

  .dh-brand__sep,
  .dh-brand__sub,
  .dh-version {
    display: none;
  }

  .dh-brand {
    min-width: 0;
  }

  .dh-brand__name {
    font-size: 15.5px;
  }

  .dh-header__nav {
    display: none;
  }

  .dh-header__actions {
    margin-left: auto;
  }

  .dh-js .dh-drawer-toggle {
    display: inline-flex;
  }

  .dh-drawer-toggle,
  .dh-icon-btn {
    width: var(--dh-tap);
    height: var(--dh-tap);
  }

  .dh-shell,
  .dh-shell--article {
    grid-template-columns: minmax(0, 1fr);
  }

  /* 无 JS 时：目录仍在文档流内，可直接阅读与折叠 */
  .dh-sidebar {
    position: static;
    height: auto;
    padding: var(--dh-space-4);
    border-right: 0;
    border-bottom: var(--dh-border) solid var(--dh-color-border);
  }

  .dh-js .dh-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: var(--dh-z-drawer);
    width: min(320px, 86vw);
    height: 100dvh;
    padding: var(--dh-space-4) var(--dh-space-4) var(--dh-space-7);
    border-right: var(--dh-border) solid var(--dh-color-border);
    border-bottom: 0;
    background: var(--dh-color-bg);
    box-shadow: var(--dh-shadow-lg);
    transform: translateX(-100%);
    transition: transform 200ms var(--dh-ease);
    visibility: hidden;
  }

  .dh-js [data-drawer-open="true"] .dh-sidebar {
    transform: translateX(0);
    visibility: visible;
  }

  .dh-js [data-drawer-open="true"] .dh-backdrop {
    opacity: 1;
    visibility: visible;
  }

  .dh-js .dh-sidebar__close {
    display: inline-flex;
  }

  body.dh-no-scroll {
    overflow: hidden;
  }

  .dh-main,
  .dh-main--article {
    padding: var(--dh-space-4) var(--dh-space-4) var(--dh-space-7);
  }

  .dh-main__inner {
    max-width: none;
  }

  .dh-tree {
    font-size: 14px;
  }

  .dh-tree__group > summary,
  .dh-tree__sub > summary,
  .dh-tree__link {
    min-height: var(--dh-tap);
  }

  .dh-article-title {
    font-size: 25px;
  }

  .dh-page-title {
    font-size: var(--dh-text-h1);
  }

  .dh-article-lede,
  .dh-intro__lede {
    font-size: 15px;
  }

  .dh-intro__mark {
    width: 40px;
    height: 40px;
  }

  .dh-prose h2 {
    margin-top: var(--dh-space-6);
  }

  .dh-prose p {
    max-width: none;
  }

  .dh-quick {
    grid-template-columns: minmax(0, 1fr);
  }

  .dh-quick__item {
    border-right: 0;
    border-bottom: var(--dh-border) solid var(--dh-color-border);
  }

  .dh-quick__item:last-child {
    border-bottom: 0;
  }

  .dh-cats,
  .dh-dir-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 0;
  }

  .dh-section {
    margin-top: var(--dh-space-6);
  }

  .dh-btn {
    min-height: var(--dh-tap);
  }

  .dh-cat__link,
  .dh-footer__links a,
  .dh-footer__demo {
    min-height: var(--dh-tap);
  }

  .dh-doclist__link {
    padding: var(--dh-space-3) var(--dh-space-2) var(--dh-space-3) 0;
  }

  .dh-doclist--compact .dh-doclist__link {
    flex-direction: column;
    align-items: flex-start;
    gap: 3px;
    min-height: var(--dh-tap);
  }

  .dh-doclist--compact .dh-doclist__time {
    white-space: normal;
  }

  .dh-code__copy {
    min-height: 40px;
    padding: 0 var(--dh-space-3);
  }

  .dh-code pre {
    padding: var(--dh-space-3);
    font-size: 12.5px;
  }

  .dh-figure__zoom {
    right: 8px;
    bottom: 8px;
  }

  .dh-figure__frame {
    border-radius: var(--dh-radius-sm);
  }

  .dh-to-top {
    width: var(--dh-tap);
    height: var(--dh-tap);
    right: var(--dh-space-4);
    bottom: var(--dh-space-4);
  }

  .dh-footer__inner {
    padding: var(--dh-space-5) var(--dh-space-4);
  }

  .dh-footer__bottom-inner {
    padding: var(--dh-space-3) var(--dh-space-4);
  }

  .dh-lightbox {
    width: 94vw;
    max-height: 90dvh;
  }

  .dh-lightbox__img {
    max-height: calc(90dvh - 72px);
  }

  .dh-empty {
    padding: var(--dh-space-6) var(--dh-space-4);
  }

  .dh-article-meta,
  .dh-page-meta {
    gap: 3px var(--dh-space-3);
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
  }
}