/* =========================================================
   万象客栈 · 设定集
   风格：新极简中式
   墨 · 宣纸 · 朱砂 · 细线 · 留白
   ========================================================= */

:root {
  --paper: #faf9f5;
  --paper-2: #f3f1ea;
  --paper-3: #e9e6dc;
  --ink: #1c1b18;
  --ink-2: #4d4b45;
  --ink-3: #8b877d;
  --line: rgba(28, 27, 24, 0.10);
  --line-strong: rgba(28, 27, 24, 0.30);
  --accent: #a8342a;
  --accent-soft: rgba(168, 52, 42, 0.07);
  --accent-2: #3a4a52;
  --gold: #8a7448;
  --card: transparent;
  --card-hover: var(--paper-2);
  --shadow: none;
  --shadow-lg: 0 24px 70px rgba(28, 27, 24, 0.14);
  --serif: "Songti SC", "Source Han Serif SC", "Noto Serif SC", "SimSun", serif;
  --sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --mono: "JetBrains Mono", "Cascadia Code", Consolas, monospace;
  --sidebar-w: 248px;
  --toc-w: 200px;
  --topbar-h: 58px;
  --radius: 2px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

[data-theme="dark"] {
  --paper: #111110;
  --paper-2: #181816;
  --paper-3: #201f1b;
  --ink: #ebe7dd;
  --ink-2: #b7b2a7;
  --ink-3: #7d7970;
  --line: rgba(235, 231, 221, 0.10);
  --line-strong: rgba(235, 231, 221, 0.28);
  --accent: #c4695a;
  --accent-soft: rgba(196, 105, 90, 0.10);
  --accent-2: #8ba0ab;
  --gold: #b99a6a;
  --shadow-lg: 0 24px 70px rgba(0, 0, 0, 0.55);
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--topbar-h) + 28px);
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--sans);
  font-size: 14.5px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; cursor: pointer; }
::selection { background: var(--accent-soft); color: var(--ink); }

:focus-visible {
  outline: 1px solid var(--accent);
  outline-offset: 3px;
}

/* ---------------- 顶栏 ---------------- */

.topbar {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 0 28px;
  z-index: 60;
  border-bottom: 1px solid var(--line);
  background: var(--paper);
}

.brand { display: flex; align-items: center; gap: 11px; min-width: 0; }

.brand-mark {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  background: var(--accent);
  color: var(--paper);
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1;
  border-radius: 1px;
}

.brand-text { display: flex; flex-direction: column; line-height: 1.25; }
.brand-text b {
  font-family: var(--serif);
  font-size: 14.5px;
  font-weight: 600;
  letter-spacing: 0.22em;
}
.brand-text small {
  color: var(--ink-3);
  font-size: 9.5px;
  letter-spacing: 0.26em;
}

.topbar-actions { margin-left: auto; display: flex; align-items: center; gap: 8px; }

.icon-btn {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: transparent;
  color: var(--ink-2);
  transition: border-color 0.18s var(--ease), color 0.18s var(--ease);
}
.icon-btn:hover { border-color: var(--line-strong); color: var(--ink); }

.menu-btn { display: none; }

.map-link {
  display: inline-flex;
  align-items: center;
  height: 32px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--ink-2);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  transition: border-color 0.18s var(--ease), color 0.18s var(--ease);
}
.map-link:hover { border-color: var(--line-strong); color: var(--ink); }

.search-trigger {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 32px;
  padding: 0 11px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: transparent;
  color: var(--ink-3);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  transition: border-color 0.18s var(--ease), color 0.18s var(--ease);
}
.search-trigger:hover { border-color: var(--line-strong); color: var(--ink); }

.search-icon { font-size: 13px; color: var(--accent); }

kbd {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 18px;
  height: 18px;
  padding: 0 4px;
  border: 1px solid var(--line);
  border-radius: 1px;
  background: transparent;
  color: var(--ink-3);
  font-family: var(--mono);
  font-size: 9px;
}

.theme-btn { position: relative; }
.theme-sun, .theme-moon { position: absolute; transition: opacity 0.25s var(--ease), transform 0.25s var(--ease); }
[data-theme="light"] .theme-moon { opacity: 0; transform: rotate(-90deg) scale(0.6); }
[data-theme="dark"] .theme-sun { opacity: 0; transform: rotate(90deg) scale(0.6); }

/* ---------------- 布局 ---------------- */

.app {
  display: grid;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr) var(--toc-w);
  align-items: start;
  padding-top: var(--topbar-h);
}

.sidebar {
  position: sticky;
  top: var(--topbar-h);
  height: calc(100vh - var(--topbar-h));
  overflow-y: auto;
  padding: 32px 20px 24px 26px;
  border-right: 1px solid var(--line);
}

.sidebar::-webkit-scrollbar { width: 4px; }
.sidebar::-webkit-scrollbar-track { background: transparent; }
.sidebar::-webkit-scrollbar-thumb { background: var(--line-strong); }

.nav-group { margin-bottom: 26px; }
.nav-group-title {
  margin: 0 0 8px;
  color: var(--ink-3);
  font-size: 9.5px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
}

.nav-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 6px 0 6px 10px;
  margin-left: -11px;
  border-left: 2px solid transparent;
  color: var(--ink-2);
  font-size: 13px;
  line-height: 1.5;
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease);
}
.nav-item:hover { color: var(--ink); border-left-color: var(--line); }
.nav-item.is-active {
  color: var(--ink);
  border-left-color: var(--accent);
  font-weight: 600;
}

.nav-num {
  flex: none;
  width: 19px;
  padding-top: 1px;
  color: var(--ink-3);
  font-family: var(--mono);
  font-size: 9.5px;
}
.nav-item.is-active .nav-num { color: var(--accent); }

.nav-dot { flex: none; width: 5px; height: 5px; border-radius: 50%; margin-top: 8px; }
.nav-label {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.45;
}

.sidebar-foot {
  margin-top: 10px;
  padding: 16px 0 0;
  border-top: 1px solid var(--line);
  color: var(--ink-3);
  font-size: 9.5px;
  letter-spacing: 0.16em;
}

.dot-live {
  display: inline-block;
  width: 4px;
  height: 4px;
  margin-right: 7px;
  border-radius: 50%;
  background: var(--accent);
  vertical-align: 1px;
}

.sidebar-scrim { display: none; }

/* ---------------- 正文 ---------------- */

.content { min-width: 0; padding: 44px clamp(28px, 5vw, 72px) 64px; }

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 7px;
  margin-bottom: 30px;
  color: var(--ink-3);
  font-size: 10.5px;
  letter-spacing: 0.08em;
}
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb .sep { opacity: 0.45; }
.breadcrumb .current { color: var(--ink-2); }

.prose { max-width: 760px; margin: 0 auto; }
.doc-header { margin-bottom: 40px; }

.eyebrow {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 14px;
  color: var(--accent);
  font-size: 9.5px;
  letter-spacing: 0.34em;
}
.eyebrow::before {
  content: "";
  width: 18px;
  height: 1px;
  background: var(--accent);
}

.doc-header h1 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(30px, 4vw, 42px);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: 0.05em;
}

.lead {
  margin: 16px 0 0;
  color: var(--ink-2);
  font-family: var(--serif);
  font-size: 16px;
  line-height: 1.9;
  letter-spacing: 0.02em;
}

.doc-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
  padding-top: 13px;
  border-top: 1px solid var(--line);
  color: var(--ink-3);
  font-size: 10px;
  letter-spacing: 0.08em;
}
.meta-dot { opacity: 0.4; }

/* ---------------- Markdown ---------------- */

.markdown-body {
  color: var(--ink-2);
  font-family: var(--serif);
  font-size: 16px;
  line-height: 1.95;
  letter-spacing: 0.01em;
}

.markdown-body > *:first-child { margin-top: 0; }

.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4 {
  color: var(--ink);
  font-family: var(--serif);
  font-weight: 600;
  line-height: 1.45;
  letter-spacing: 0.04em;
  scroll-margin-top: calc(var(--topbar-h) + 24px);
}

.markdown-body h1 { font-size: 26px; margin: 48px 0 18px; }

.markdown-body h2 {
  display: flex;
  align-items: center;
  margin: 54px 0 20px;
  padding-top: 0;
  font-size: 22px;
}
.markdown-body h2::before {
  content: "";
  flex: none;
  width: 3px;
  height: 17px;
  margin-right: 12px;
  background: var(--accent);
}

.markdown-body h3 { margin: 34px 0 12px; font-size: 17.5px; }
.markdown-body h4 { margin: 26px 0 10px; font-size: 15.5px; color: var(--ink-2); }

.markdown-body p { margin: 0 0 1.05em; }

.markdown-body a {
  color: var(--accent);
  border-bottom: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
  transition: border-color 0.16s var(--ease);
}
.markdown-body a:hover { border-bottom-color: var(--accent); }

.markdown-body strong { color: var(--ink); font-weight: 700; }
.markdown-body em { color: var(--ink-2); }

.markdown-body ul,
.markdown-body ol { margin: 0 0 1.1em; padding-left: 1.4em; }
.markdown-body li { margin: 6px 0; }
.markdown-body li::marker { color: var(--accent); }

.markdown-body blockquote {
  margin: 24px 0;
  padding: 2px 0 2px 18px;
  border-left: 2px solid var(--accent);
  background: none;
  color: var(--ink-2);
  font-family: var(--serif);
}
.markdown-body blockquote p { margin: 0 0 8px; }
.markdown-body blockquote p:last-child { margin-bottom: 0; }

.markdown-body hr {
  height: 1px;
  margin: 46px 0;
  border: 0;
  background: var(--line);
}

/* 表格：只保留横线，无斑马纹、无外框 */
.markdown-body .table-wrap {
  margin: 26px 0 30px;
  overflow-x: auto;
  border-top: 1.5px solid var(--ink);
  border-bottom: 1px solid var(--line-strong);
  scrollbar-width: thin;
  scrollbar-color: var(--line-strong) transparent;
}
.markdown-body .table-wrap::-webkit-scrollbar { height: 6px; }
.markdown-body .table-wrap::-webkit-scrollbar-thumb { background: var(--line-strong); }

.markdown-body table {
  width: 100%;
  margin: 0;
  border-collapse: collapse;
  background: transparent;
  font-family: var(--sans);
  font-size: 13px;
  line-height: 1.7;
}

.markdown-body thead th {
  padding: 11px 12px;
  border-bottom: 1px solid var(--ink);
  color: var(--ink-2);
  font-weight: 500;
  font-size: 11.5px;
  letter-spacing: 0.06em;
  text-align: left;
  white-space: normal;
  vertical-align: bottom;
}

.markdown-body tbody td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
.markdown-body tbody tr:last-child td { border-bottom: 0; }
.markdown-body tbody tr { transition: background 0.14s var(--ease); }
.markdown-body tbody tr:hover { background: var(--accent-soft); }

.markdown-body code {
  padding: 1px 4px;
  border-radius: 1px;
  background: var(--paper-3);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 0.85em;
}

.markdown-body pre {
  margin: 24px 0;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-2);
  overflow-x: auto;
  line-height: 1.75;
}
.markdown-body pre code { padding: 0; background: none; font-size: 12px; }

.markdown-body img {
  display: block;
  max-width: 100%;
  margin: 26px 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.render-error {
  padding: 16px;
  border: 1px solid var(--accent);
  background: var(--accent-soft);
}

/* ---------------- 目录 ---------------- */

.toc {
  position: sticky;
  top: var(--topbar-h);
  max-height: calc(100vh - var(--topbar-h));
  overflow-y: auto;
  padding: 46px 22px 40px 14px;
  border-left: 1px solid var(--line);
  font-size: 11.5px;
}
.toc::-webkit-scrollbar { width: 4px; }
.toc::-webkit-scrollbar-track { background: transparent; }
.toc::-webkit-scrollbar-thumb { background: var(--line-strong); }

.toc-title {
  margin-bottom: 12px;
  color: var(--ink-3);
  font-size: 9.5px;
  letter-spacing: 0.3em;
}

.toc-list { margin: 0; padding: 0; list-style: none; border-left: 1px solid var(--line); }
.toc-item a {
  display: block;
  padding: 4px 0 4px 11px;
  margin-left: -1px;
  border-left: 1px solid transparent;
  color: var(--ink-3);
  line-height: 1.55;
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease);
}
.toc-item a:hover { color: var(--ink); }
.toc-item.is-active a {
  color: var(--accent);
  border-left-color: var(--accent);
  font-weight: 600;
}
.toc-l3 a { padding-left: 22px; font-size: 10.5px; }
.toc-empty { color: var(--ink-3); font-size: 10.5px; }

.toc-top {
  display: inline-block;
  margin-top: 20px;
  color: var(--ink-3);
  font-size: 10px;
  letter-spacing: 0.08em;
}
.toc-top:hover { color: var(--accent); }

/* ---------------- 翻页 ---------------- */

.pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  max-width: 760px;
  margin: 60px auto 0;
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line);
}

.pager-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 18px 18px 18px 0;
  transition: background 0.16s var(--ease);
}
.pager-item:hover { background: var(--paper-2); }
.pager-item.next {
  align-items: flex-end;
  padding: 18px 0 18px 18px;
  border-left: 1px solid var(--line);
  text-align: right;
}
.pager-label { color: var(--ink-3); font-size: 9.5px; letter-spacing: 0.2em; }
.pager-title { color: var(--ink); font-family: var(--serif); font-size: 14px; font-weight: 600; }
.pager-arrow { display: none; }
.pager-empty { display: block; }

.site-footer {
  max-width: 760px;
  margin: 48px auto 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  color: var(--ink-3);
  font-size: 10px;
  line-height: 1.8;
  letter-spacing: 0.06em;
}

/* ---------------- 首页 ---------------- */

.home { max-width: 1120px; margin: 0 auto; padding: 0 clamp(28px, 5vw, 68px) 64px; }
.home-page .app { display: block; }
body.home-page .sidebar { display: none; }
body.home-page .app { grid-template-columns: 1fr; }
body.home-page .menu-btn { display: none; }

.hero {
  padding: clamp(72px, 10vw, 122px) 0 54px;
  border-bottom: 1px solid var(--line);
}

.hero-kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 22px;
  color: var(--ink-3);
  font-size: 9.5px;
  letter-spacing: 0.42em;
}
.hero-kicker::before {
  content: "";
  width: 34px;
  height: 1px;
  background: var(--accent);
}

.hero-title {
  margin: 0;
  color: var(--ink);
  font-family: var(--serif);
  font-size: clamp(56px, 10vw, 112px);
  font-weight: 500;
  line-height: 1.02;
  letter-spacing: 0.1em;
}

.hero-desc {
  max-width: 560px;
  margin: 26px 0 0;
  color: var(--ink-2);
  font-family: var(--serif);
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 2;
  letter-spacing: 0.02em;
}

.hero-stats { display: flex; margin-top: 42px; }
.stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 0 36px;
  border-left: 1px solid var(--line);
}
.stat:first-child { padding-left: 0; border-left: 0; }
.stat b {
  font-family: var(--serif);
  font-size: 28px;
  font-weight: 500;
  letter-spacing: 0.04em;
}
.stat span { color: var(--ink-3); font-size: 9.5px; letter-spacing: 0.24em; }

.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 38px; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  height: 40px;
  padding: 0 18px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-size: 12px;
  letter-spacing: 0.12em;
  transition: background 0.18s var(--ease), border-color 0.18s var(--ease), color 0.18s var(--ease);
}
.btn.primary { background: var(--ink); color: var(--paper); }
.btn.primary:hover { background: var(--accent); color: #faf9f5; }
.btn.ghost { border-color: var(--line); color: var(--ink-2); }
.btn.ghost:hover { border-color: var(--ink); color: var(--ink); }

.featured-block { margin-top: 64px; }

.section-label {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 0;
  padding-bottom: 12px;
  border-bottom: 1.5px solid var(--ink);
  color: var(--ink-2);
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: 0.3em;
}
.section-label::before {
  content: "";
  width: 14px;
  height: 1px;
  background: var(--accent);
}

.feature-list { border-bottom: 1px solid var(--line); }

.feature {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 24px 8px;
  border-bottom: 1px solid var(--line);
  transition: background 0.16s var(--ease), padding 0.16s var(--ease);
}
.feature:last-child { border-bottom: 0; }
.feature:hover { background: var(--paper-2); padding-left: 16px; }
.feature-num { flex: none; color: var(--accent); font-family: var(--serif); font-size: 12px; letter-spacing: 0.1em; }
.feature-body { display: flex; flex-direction: column; gap: 4px; min-width: 0; }
.feature-body b { color: var(--ink); font-family: var(--serif); font-size: 18px; font-weight: 600; letter-spacing: 0.03em; }
.feature-body small { color: var(--ink-3); font-size: 11.5px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.feature-arrow { margin-left: auto; color: var(--ink-3); font-size: 13px; transition: transform 0.18s var(--ease), color 0.18s var(--ease); }
.feature:hover .feature-arrow { transform: translateX(4px); color: var(--accent); }

.groups { margin-top: 64px; }

.group-block { margin-bottom: 52px; }
.group-head {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-strong);
}
.group-head h2 { margin: 0; font-family: var(--serif); font-size: 20px; font-weight: 600; letter-spacing: 0.06em; }
.group-head p { margin: 0; color: var(--ink-3); font-size: 11px; letter-spacing: 0.04em; }
.group-count { margin-left: auto; color: var(--ink-3); font-size: 9.5px; letter-spacing: 0.16em; }

.doc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(272px, 1fr));
  gap: 12px;
}

.doc-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px 18px 15px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: transparent;
  transition: border-color 0.18s var(--ease), background 0.18s var(--ease);
}
.doc-card:hover { border-color: var(--line-strong); background: var(--paper-2); }
.doc-card-top { display: flex; align-items: center; gap: 8px; }
.card-dot { flex: none; width: 5px; height: 5px; border-radius: 50%; }
.doc-card-title { color: var(--ink); font-family: var(--serif); font-size: 15.5px; font-weight: 600; letter-spacing: 0.02em; }
.doc-card-desc {
  color: var(--ink-3);
  font-size: 11.5px;
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.doc-card-meta { margin-top: auto; color: var(--ink-3); font-size: 9.5px; letter-spacing: 0.12em; }

/* ---------------- 搜索 ---------------- */

.search-modal { position: fixed; inset: 0; z-index: 100; display: none; }
.search-modal.is-open { display: block; }

.search-backdrop { position: absolute; inset: 0; background: rgba(24, 20, 14, 0.38); }

.search-panel {
  position: relative;
  width: min(660px, calc(100vw - 32px));
  margin: 10vh auto 0;
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  background: var(--paper);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  animation: pop 0.16s var(--ease);
}

@keyframes pop {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: none; }
}

.search-box {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 15px 16px;
  border-bottom: 1px solid var(--line-strong);
}
.search-box input {
  flex: 1;
  min-width: 0;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 16px;
  letter-spacing: 0.02em;
}
.search-box input::placeholder { color: var(--ink-3); }
.search-close {
  border: 1px solid var(--line);
  border-radius: 1px;
  background: transparent;
  color: var(--ink-3);
  font-family: var(--mono);
  font-size: 9px;
  padding: 4px 7px;
}

.search-results { max-height: 56vh; overflow-y: auto; padding: 4px 0; }

.search-item {
  display: block;
  padding: 11px 16px 11px 14px;
  border-left: 2px solid transparent;
  transition: background 0.14s var(--ease), border-color 0.14s var(--ease);
}
.search-item:hover,
.search-item.is-selected { background: var(--accent-soft); border-left-color: var(--accent); }
.search-item-head { display: flex; align-items: baseline; gap: 8px; }
.search-item-title { color: var(--ink); font-family: var(--serif); font-size: 14.5px; font-weight: 600; }
.search-item-group { color: var(--ink-3); font-size: 9.5px; letter-spacing: 0.16em; }
.search-item-snippet {
  margin-top: 4px;
  color: var(--ink-3);
  font-size: 11.5px;
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.search-item-snippet mark {
  background: transparent;
  color: var(--accent);
  font-weight: 600;
}

.search-hint {
  padding: 9px 16px;
  border-top: 1px solid var(--line);
  color: var(--ink-3);
  font-size: 9.5px;
  letter-spacing: 0.1em;
}

.search-empty { padding: 34px 16px; text-align: center; color: var(--ink-3); font-size: 12px; letter-spacing: 0.04em; }

/* ---------------- 进度条 ---------------- */

.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 0;
  z-index: 80;
  background: var(--accent);
  transition: width 0.1s linear;
}

/* ---------------- 响应式 ---------------- */

@media (max-width: 1180px) {
  .app { grid-template-columns: var(--sidebar-w) minmax(0, 1fr); }
  .toc { display: none; }
}

@media (max-width: 860px) {
  .app { grid-template-columns: 1fr; }
  .menu-btn { display: grid; }
  .search-trigger span:not(.search-icon), .search-trigger kbd { display: none; }
  .search-trigger { width: 32px; padding: 0; justify-content: center; }
  .map-link { padding: 0 9px; font-size: 10.5px; }
  .brand-text small { display: none; }
  .topbar { padding: 0 16px; }

  .sidebar {
    position: fixed;
    top: var(--topbar-h);
    left: 0;
    bottom: 0;
    width: min(290px, 82vw);
    height: auto;
    z-index: 55;
    background: var(--paper);
    border-right: 1px solid var(--line-strong);
    transform: translateX(-102%);
    transition: transform 0.22s var(--ease);
  }
  body.nav-open .sidebar { transform: none; }
  body.nav-open { overflow: hidden; }
  .sidebar-scrim {
    display: block;
    position: fixed;
    inset: var(--topbar-h) 0 0 0;
    z-index: 54;
    background: rgba(24, 20, 14, 0.36);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s var(--ease);
  }
  body.nav-open .sidebar-scrim { opacity: 1; pointer-events: auto; }

  .content { padding: 28px 20px 52px; }
  .markdown-body { font-size: 15.5px; }
  .markdown-body thead th { position: static; }
  .pager { grid-template-columns: 1fr; }
  .pager-item.next { border-left: 0; border-top: 1px solid var(--line); padding-left: 0; }
  .home { padding: 0 20px 52px; }
  .hero { padding: 56px 0 40px; }
  .hero-stats { flex-wrap: wrap; gap: 18px 0; }
  .stat { padding: 0 22px; }
  .group-head { flex-wrap: wrap; }
  .group-head p { width: 100%; }
}

@media (max-width: 520px) {
  .brand-text b { font-size: 13px; letter-spacing: 0.16em; }
  .doc-header h1 { font-size: 27px; }
  .hero-title { letter-spacing: 0.06em; }
  .doc-grid { grid-template-columns: 1fr; }
  .hero-actions .btn { flex: 1 1 auto; justify-content: center; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}

/* ---------------- 打印 ---------------- */

@media print {
  .topbar, .sidebar, .toc, .pager, .reading-progress, .site-footer, .search-modal { display: none !important; }
  .app { display: block; padding: 0; }
  .content { padding: 0; max-width: none; }
  .prose { max-width: none; }
  body { background: #fff; color: #000; font-size: 11pt; }
  .markdown-body a { color: #000; border: 0; }
  .markdown-body h2 { page-break-after: avoid; }
  .markdown-body .table-wrap { page-break-inside: avoid; border-top-color: #000; }
}