/* 十八中论坛文档站样式。配色沿用论坛主站（assets/css/style.css）的 token，读起来像同一个站点。 */

:root {
  --primary: #0d9488;
  --primary-hover: #0f766e;
  --primary-soft: rgba(13, 148, 136, 0.08);
  --bg: #f8f6f4;
  --surface: #ffffff;
  --surface-2: #f2efec;
  --border: #e7e3de;
  --text: #1c1917;
  --text-2: #57534e;
  --text-3: #a8a29e;
  --code-bg: #f0eeec;
  --code-border: #e2ddd8;
  --quote-bg: #f4f2ef;
  --topbar-bg: rgba(248, 246, 244, 0.86);
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.04), 0 8px 24px rgba(28, 25, 23, 0.06);
  --radius: 10px;
  --sidebar-w: 288px;
  --toc-w: 232px;
  --content-w: 748px;
  --topbar-h: 56px;
  --font-fallback: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", "Noto Sans SC", sans-serif;
  --font: ForumWenHei85, var(--font-fallback);
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
}

html[data-theme="dark"] {
  --primary: #2dd4bf;
  --primary-hover: #5eead4;
  --primary-soft: rgba(45, 212, 191, 0.12);
  --bg: #111214;
  --surface: #1b1d20;
  --surface-2: #202327;
  --border: #303238;
  --text: #f0f1f2;
  --text-2: #b0b2b7;
  --text-3: #858890;
  --code-bg: #16181b;
  --code-border: #2c2f34;
  --quote-bg: #1c1f23;
  --topbar-bg: rgba(17, 18, 20, 0.86);
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 10px 30px rgba(0, 0, 0, 0.35);
}

@media (prefers-color-scheme: dark) {
  html:not([data-theme="light"]) {
    --primary: #2dd4bf;
    --primary-hover: #5eead4;
    --primary-soft: rgba(45, 212, 191, 0.12);
    --bg: #111214;
    --surface: #1b1d20;
    --surface-2: #202327;
    --border: #303238;
    --text: #f0f1f2;
    --text-2: #b0b2b7;
    --text-3: #858890;
    --code-bg: #16181b;
    --code-border: #2c2f34;
    --quote-bg: #1c1f23;
    --topbar-bg: rgba(17, 18, 20, 0.86);
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 10px 30px rgba(0, 0, 0, 0.35);
  }
}

* { box-sizing: border-box; }

/* [hidden] 必须真的不显示。浏览器默认的 [hidden]{display:none} 只是 UA 级，作者样式里任何一条
   display（比如下面 .search-overlay 的 display:flex）都能压过它——2026-09-26 的事故就是：
   搜索遮罩带着 hidden 仍然铺满屏幕，点关闭也关不掉。 */
[hidden] { display: none !important; }

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--topbar-h) + 16px); }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.72;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-hover); text-decoration: underline; }

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--primary); color: #fff; padding: 10px 16px; border-radius: 0 0 var(--radius) 0;
}
.skip-link:focus { left: 0; }

/* ── 顶栏 ───────────────────────────────────────────── */
.topbar {
  position: sticky; top: 0; z-index: 40;
  background: var(--topbar-bg);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.topbar-inner {
  height: var(--topbar-h);
  display: flex; align-items: center; gap: 12px;
  padding: 0 20px; max-width: 1560px; margin: 0 auto;
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); min-width: 0; }
.brand:hover { text-decoration: none; color: var(--text); }
.brand-mark {
  width: 30px; height: 30px; flex: none; border-radius: 8px;
  object-fit: contain; display: block;
}
.brand-text { display: flex; flex-direction: column; line-height: 1.25; min-width: 0; }
.brand-text strong { font-size: 14px; font-weight: 500; }
.brand-text em { font-size: 12px; font-style: normal; color: var(--text-3); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.topbar-actions { margin-left: auto; display: flex; align-items: center; gap: 8px; }

.icon-btn {
  width: 34px; height: 34px; flex: none; display: flex; align-items: center; justify-content: center;
  background: transparent; color: var(--text-2); border: 1px solid transparent; border-radius: 9px;
  cursor: pointer; font-size: 14px; transition: background .15s, color .15s;
}
.icon-btn:hover { background: var(--surface-2); color: var(--text); }
.icon-btn svg { width: 18px; height: 18px; }
.nav-toggle { display: none; }

.search-btn {
  display: flex; align-items: center; gap: 8px;
  height: 34px; padding: 0 10px 0 12px;
  background: var(--surface); color: var(--text-3);
  border: 1px solid var(--border); border-radius: 9px; cursor: pointer; font-size: 13px;
  font-family: inherit; transition: border-color .15s, color .15s;
}
.search-btn:hover { border-color: var(--primary); color: var(--text-2); }
.search-btn svg { width: 15px; height: 15px; }
.search-btn kbd {
  font-family: var(--mono); font-size: 11px; padding: 1px 5px; border-radius: 5px;
  background: var(--surface-2); border: 1px solid var(--border); color: var(--text-3);
}
.forum-link {
  height: 34px; display: flex; align-items: center; padding: 0 12px; font-size: 13px;
  border-radius: 9px; border: 1px solid var(--border); background: var(--surface); color: var(--text-2);
}
.forum-link:hover { border-color: var(--primary); color: var(--primary); text-decoration: none; }

/* ── 三栏骨架 ───────────────────────────────────────── */
.layout {
  display: grid;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr);
  max-width: 1560px; margin: 0 auto; align-items: start;
}
.sidebar {
  position: sticky; top: var(--topbar-h); height: calc(100vh - var(--topbar-h));
  overflow-y: auto; overscroll-behavior: contain;
  padding: 22px 16px 40px 20px;
  border-right: 1px solid var(--border);
}
.sidebar-head { padding: 0 8px 14px; }
.sidebar-kicker { margin: 0 0 4px; font-size: 11px; letter-spacing: .12em; text-transform: uppercase; color: var(--text-3); }
.sidebar-book { font-size: 15px; font-weight: 500; color: var(--text); }
.sidebar-book:hover { color: var(--primary); text-decoration: none; }
.sidebar-nav ol { list-style: none; margin: 0; padding: 0; counter-reset: none; }
.sidebar-nav a {
  display: flex; gap: 10px; align-items: baseline;
  padding: 7px 10px; border-radius: 8px;
  color: var(--text-2); font-size: 13.5px; line-height: 1.5;
}
.sidebar-nav a:hover { background: var(--surface-2); color: var(--text); text-decoration: none; }
.sidebar-nav .is-active > a { background: var(--primary-soft); color: var(--primary); font-weight: 500; }
.nav-index { font-family: var(--mono); font-size: 11px; color: var(--text-3); flex: none; padding-top: 1px; }
.is-active .nav-index { color: var(--primary); }
.sidebar-foot { margin-top: 22px; padding: 14px 10px 0; border-top: 1px solid var(--border); font-size: 12px; color: var(--text-3); }
.sidebar-books a { margin-right: 6px; }
.sidebar-updated { margin: 6px 0 0; }

.main { min-width: 0; }
.main-inner {
  display: grid; grid-template-columns: minmax(0, var(--content-w)) var(--toc-w);
  gap: 56px; justify-content: center; padding: 40px 32px 96px;
}
.content { min-width: 0; }
.toc-col { position: sticky; top: calc(var(--topbar-h) + 40px); max-height: calc(100vh - var(--topbar-h) - 80px); overflow-y: auto; }

/* ── 正文排版 ───────────────────────────────────────── */
.doc { color: var(--text); }
.page-head { margin-bottom: 28px; }
.breadcrumb { margin: 0 0 14px; font-size: 12.5px; color: var(--text-3); }
.breadcrumb a { color: var(--text-3); }
.breadcrumb a:hover { color: var(--primary); }
.page-head h1 { margin: 0 0 12px; font-size: 34px; line-height: 1.25; letter-spacing: -0.01em; font-weight: 500; }
.page-summary { margin: 0; color: var(--text-2); font-size: 16px; }

.doc h1 { font-size: 30px; line-height: 1.3; margin: 0 0 20px; font-weight: 500; }
.doc h2 {
  font-size: 23px; line-height: 1.35; margin: 48px 0 16px; padding-top: 6px; font-weight: 500;
  border-top: 1px solid var(--border); padding-top: 24px;
}
.doc h2:first-of-type { margin-top: 36px; }
.doc h3 { font-size: 18px; margin: 32px 0 12px; font-weight: 500; }
.doc h4 { font-size: 16px; margin: 24px 0 10px; color: var(--text-2); font-weight: 500; }
.doc p { margin: 0 0 16px; }
.doc ul, .doc ol { margin: 0 0 18px; padding-left: 22px; }
.doc li { margin: 6px 0; }
.doc li > ul, .doc li > ol { margin: 6px 0 6px; }
.doc strong { font-weight: 500; }
.doc hr { border: 0; border-top: 1px solid var(--border); margin: 36px 0; }

.doc code {
  font-family: var(--mono); font-size: .88em;
  background: var(--code-bg); border: 1px solid var(--code-border);
  padding: 1px 5px; border-radius: 6px; word-break: break-word;
}
.doc pre {
  background: var(--code-bg); border: 1px solid var(--code-border);
  border-radius: var(--radius); padding: 14px 16px; overflow-x: auto; margin: 0 0 20px;
  line-height: 1.6;
}
.doc pre code { background: none; border: 0; padding: 0; font-size: 13px; }

.doc blockquote {
  margin: 0 0 20px; padding: 12px 18px; background: var(--quote-bg);
  border-left: 3px solid var(--border); border-radius: 0 var(--radius) var(--radius) 0; color: var(--text-2);
}
.doc blockquote p:last-child { margin-bottom: 0; }

.table-wrap { overflow-x: auto; margin: 0 0 22px; border: 1px solid var(--border); border-radius: var(--radius); }
.doc table { border-collapse: collapse; width: 100%; font-size: 14.5px; }
.doc th, .doc td { padding: 10px 14px; text-align: left; border-bottom: 1px solid var(--border); vertical-align: top; }
.doc th { background: var(--surface-2); font-weight: 500; white-space: nowrap; }
.doc tbody tr:last-child td { border-bottom: 0; }
.doc tbody tr:hover { background: var(--primary-soft); }

.callout { margin: 0 0 22px; padding: 14px 18px; border-radius: var(--radius); border: 1px solid var(--border); background: var(--surface); }
.callout p { margin: 0 0 10px; }
.callout p:last-child { margin-bottom: 0; }
.callout-title { font-weight: 500; font-size: 14px; margin-bottom: 6px !important; }
.callout-note { border-left: 3px solid #0d9488; background: var(--primary-soft); }
.callout-tip { border-left: 3px solid #16a34a; background: rgba(22, 163, 74, 0.07); }
.callout-important { border-left: 3px solid #6366f1; background: rgba(99, 102, 241, 0.08); }
.callout-warning { border-left: 3px solid #d97706; background: rgba(217, 119, 6, 0.09); }
.callout-danger { border-left: 3px solid #dc2626; background: rgba(220, 38, 38, 0.08); }

.heading-link {
  margin-left: 10px; font-size: 15px; color: var(--text-3); opacity: 0;
  text-decoration: none; font-weight: 400; transition: opacity .15s;
}
.doc h2:hover .heading-link, .doc h3:hover .heading-link, .heading-link:focus { opacity: 1; }
.heading-link:hover { color: var(--primary); text-decoration: none; }

/* ── 封面页 / 文档首页 ──────────────────────────────── */
.cover-kicker { margin: 0 0 10px; font-size: 12px; letter-spacing: .16em; text-transform: uppercase; color: var(--primary); font-weight: 500; }
.cover h1 { font-size: 40px; margin: 0 0 14px; font-weight: 500; }
.cover-subtitle { font-size: 17px; color: var(--text-2); margin: 0 0 18px; }
.cover-meta { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 32px; }
.cover-meta span {
  font-size: 12.5px; color: var(--text-2); background: var(--surface-2);
  border: 1px solid var(--border); border-radius: 999px; padding: 4px 12px;
}
.cover-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.cover-list a {
  display: flex; gap: 16px; align-items: flex-start; padding: 14px 16px;
  border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface);
  color: var(--text); transition: border-color .15s, transform .15s, box-shadow .15s;
}
.cover-list a:hover { border-color: var(--primary); text-decoration: none; transform: translateY(-1px); box-shadow: var(--shadow); }
.cover-index { font-family: var(--mono); font-size: 12px; color: var(--text-3); padding-top: 3px; }
.cover-text { display: flex; flex-direction: column; gap: 3px; }
.cover-text strong { font-weight: 500; font-size: 15.5px; }
.cover-text em { font-style: normal; font-size: 13.5px; color: var(--text-2); }

.home { max-width: 860px; }
.home h1 { font-size: 38px; margin: 0 0 12px; font-weight: 500; }
.home-tagline { font-size: 17px; color: var(--text-2); margin: 0 0 34px; }
.home-grid { display: grid; gap: 14px; }
.home-card {
  display: block; padding: 20px 22px; border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--surface); color: var(--text); transition: border-color .15s, transform .15s, box-shadow .15s;
}
.home-card:hover { border-color: var(--primary); text-decoration: none; transform: translateY(-1px); box-shadow: var(--shadow); }
.home-card h2 { margin: 0 0 6px; font-size: 19px; }
.home-card p { margin: 0 0 10px; color: var(--text-2); font-size: 14.5px; }
.home-card-meta { font-size: 12.5px; color: var(--text-3); }
.home-foot { margin-top: 30px; font-size: 14px; color: var(--text-2); }

/* ── 页内目录 ───────────────────────────────────────── */
.page-toc { font-size: 13px; }
.page-toc-title { margin: 0 0 10px; font-size: 11px; letter-spacing: .12em; text-transform: uppercase; color: var(--text-3); }
.page-toc ol { list-style: none; margin: 0; padding: 0; border-left: 1px solid var(--border); }
.page-toc li { margin: 0; }
.page-toc a { display: block; padding: 4px 0 4px 12px; color: var(--text-2); border-left: 2px solid transparent; margin-left: -1px; }
.page-toc a:hover { color: var(--text); text-decoration: none; }
.page-toc a.is-current { color: var(--primary); border-left-color: var(--primary); font-weight: 500; }
.toc-level-3 a { padding-left: 24px; font-size: 12.5px; color: var(--text-3); }

/* ── 翻页与页脚 ─────────────────────────────────────── */
.page-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 56px 0 0; }
.page-nav-link {
  display: flex; flex-direction: column; gap: 4px; padding: 12px 16px;
  border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); color: var(--text);
  min-height: 62px; justify-content: center;
}
.page-nav-link:hover { border-color: var(--primary); text-decoration: none; box-shadow: var(--shadow); }
.page-nav-link span { font-size: 12px; color: var(--text-3); }
.page-nav-link strong { font-size: 14.5px; font-weight: 500; }
.page-nav-link.next { text-align: right; }
.page-nav-link.is-empty { border: 0; background: none; min-height: 0; }
.page-foot { margin-top: 56px; padding-top: 20px; border-top: 1px solid var(--border); font-size: 13.5px; color: var(--text-2); }
.page-foot p { margin: 0 0 8px; }
.page-foot-meta { color: var(--text-3); font-size: 12.5px; }

/* ── 搜索 ───────────────────────────────────────────── */
.search-overlay {
  position: fixed; inset: 0; z-index: 60;
  background: rgba(28, 25, 23, 0.45); backdrop-filter: blur(3px);
  display: flex; align-items: flex-start; justify-content: center; padding: 8vh 16px 16px;
}
.search-panel {
  width: min(680px, 100%); background: var(--surface); border: 1px solid var(--border);
  border-radius: 14px; box-shadow: 0 24px 60px rgba(0, 0, 0, 0.28); overflow: hidden;
}
.search-field { display: flex; align-items: center; gap: 10px; padding: 14px 16px; border-bottom: 1px solid var(--border); }
.search-field svg { width: 18px; height: 18px; color: var(--text-3); flex: none; }
.search-field input {
  flex: 1; border: 0; background: none; outline: none; color: var(--text);
  font-size: 16px; font-family: inherit;
}
.search-results { list-style: none; margin: 0; padding: 6px; max-height: 56vh; overflow-y: auto; }
.search-results li { margin: 0; }
.search-results a { display: block; padding: 10px 12px; border-radius: 8px; color: var(--text); }
.search-results a:hover, .search-results a.is-current { background: var(--primary-soft); text-decoration: none; }
.search-results strong { display: block; font-size: 14.5px; font-weight: 500; }
.search-results em { display: block; font-style: normal; font-size: 12.5px; color: var(--text-3); margin-top: 2px; }
.search-results mark { background: rgba(13, 148, 136, 0.24); color: inherit; border-radius: 3px; padding: 0 2px; }
.search-empty { padding: 18px 16px; color: var(--text-3); font-size: 14px; }
.search-hint { margin: 0; padding: 10px 16px; border-top: 1px solid var(--border); font-size: 12px; color: var(--text-3); }

/* ── 响应式 ─────────────────────────────────────────── */
.scrim { position: fixed; inset: 0; z-index: 30; background: rgba(28, 25, 23, 0.4); }

@media (max-width: 1180px) {
  .main-inner { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .toc-col { display: none; }
}

@media (max-width: 900px) {
  :root { --topbar-h: 52px; }
  .layout { grid-template-columns: minmax(0, 1fr); }
  .sidebar {
    position: fixed; top: var(--topbar-h); left: 0; z-index: 35; width: min(320px, 84vw);
    background: var(--surface); transform: translateX(-102%); transition: transform .22s ease;
    box-shadow: var(--shadow);
  }
  body.nav-open .sidebar { transform: translateX(0); }
  body.nav-open .scrim { display: block !important; }
  .nav-toggle { display: flex; }
  .main-inner { padding: 24px 20px 72px; }
  .brand-text em { display: none; }
  .search-btn-text { display: none; }
  .doc h2 { font-size: 21px; margin-top: 38px; }
  .page-head h1 { font-size: 27px; }
  .cover h1, .home h1 { font-size: 30px; }
  .page-nav { grid-template-columns: 1fr; }
}

@media print {
  .topbar, .sidebar, .toc-col, .page-nav, .search-overlay, .page-foot, .scrim { display: none !important; }
  body { background: #fff; font-size: 11.5pt; }
  .layout, .main-inner { display: block; max-width: none; padding: 0; }
  .doc h2 { break-after: avoid; }
  .doc pre, .doc table, .callout { break-inside: avoid; }
  a { color: #000; text-decoration: underline; }
}

/* ── 顶栏的论坛账号位 ─────────────────────────────────────────────── */
.forum-account { display: flex; align-items: center; gap: 8px; }
.forum-user {
  height: 34px; display: flex; align-items: center; gap: 6px; padding: 0 12px; font-size: 13px;
  border-radius: 9px; border: 1px solid var(--primary); background: var(--primary-soft);
  color: var(--primary); max-width: 200px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.forum-user:hover { text-decoration: none; border-color: var(--primary-hover); color: var(--primary-hover); }
.forum-user::before { content: "✓"; font-size: 11px; opacity: .8; }
@media (max-width: 900px) { .forum-user { max-width: 104px; } }

/* ── 字体：直接用论坛那一套字体文件与族名 ──────────────────────────────
   文件不在这个仓库里复制一份（论坛那边是 93MB），而是由文档站 vhost 的
   /assets/fonts/ 别名指向源站同一份字体目录——论坛换字体，说明书跟着换。
   族名与 assets/css/style.css、fonts-heavy.css 保持一致，这样「设置 → 个性化 → 字体」
   在论坛和这里选出来是同一套字。默认 wenhei85，与论坛新账号的默认值相同。 */
@font-face { font-family: ForumWenHei; src: url('/assets/fonts/HYWenHei-35W-6.woff2') format('woff2'); font-weight: 300; font-display: swap; }
@font-face { font-family: ForumWenHei; src: url('/assets/fonts/HYWenHei-45W-5.woff2') format('woff2'); font-weight: 400; font-display: swap; }
@font-face { font-family: ForumWenHei; src: url('/assets/fonts/HYWenHei-55W-4.woff2') format('woff2'); font-weight: 500; font-display: swap; }
@font-face { font-family: ForumWenHei; src: url('/assets/fonts/HYWenHei-65W-3.woff2') format('woff2'); font-weight: 500; font-display: swap; }
@font-face { font-family: ForumWenHei; src: url('/assets/fonts/HYWenHei-75W-2.woff2') format('woff2'); font-weight: 700; font-display: swap; }
@font-face { font-family: ForumWenHei; src: url('/assets/fonts/HYWenHei-85W-1.woff2') format('woff2'); font-weight: 800; font-display: swap; }
@font-face { font-family: ForumWenHei35; src: url('/assets/fonts/HYWenHei-35W-6.woff2') format('woff2'); font-display: swap; }
@font-face { font-family: ForumWenHei45; src: url('/assets/fonts/HYWenHei-45W-5.woff2') format('woff2'); font-display: swap; }
@font-face { font-family: ForumWenHei55; src: url('/assets/fonts/HYWenHei-55W-4.woff2') format('woff2'); font-display: swap; }
@font-face { font-family: ForumWenHei65; src: url('/assets/fonts/HYWenHei-65W-3.woff2') format('woff2'); font-display: swap; }
@font-face { font-family: ForumWenHei75; src: url('/assets/fonts/HYWenHei-75W-2.woff2') format('woff2'); font-display: swap; }
@font-face { font-family: ForumWenHei85; src: url('/assets/fonts/HYWenHei-85W-1.woff2') format('woff2'); font-display: swap; }
@font-face { font-family: ForumQiHei; src: url('/assets/fonts/HanYiQiHei-65Jian-Regular-2.woff2') format('woff2'); font-display: swap; }
@font-face { font-family: ForumQiHei65; src: url('/assets/fonts/HanYiQiHei-65Jian-Regular-2.woff2') format('woff2'); font-display: swap; }
@font-face { font-family: ForumYPHM; src: url('/assets/fonts/YinPinHongMengTi-1.woff2') format('woff2'); font-display: swap; }
@font-face { font-family: ForumMsyh; src: url('/assets/fonts/msyh.common.woff2') format('woff2'); font-display: swap; }
@font-face { font-family: ForumMincho; src: url('/assets/fonts/RiBenHuaYuanMingChaoTi-2.common.woff2') format('woff2'); font-display: swap; }
@font-face { font-family: ForumSerifFallback; src: url('/assets/fonts/SourceHanSerifCN-Regular-1.common.woff2') format('woff2'); font-weight: 400; font-display: swap; }
@font-face { font-family: ForumSerifFallback; src: url('/assets/fonts/SourceHanSerifCN-Bold-2.common.woff2') format('woff2'); font-weight: 700; font-display: swap; }

/* 文档站自己的字重映射：整体比论坛轻一档（用户两次反馈「字体太粗了」）。
   论坛的多字重家族 400 是 45W，对长文阅读偏重；这里把 400 挪到 35W，500 挪到 45W，
   600/700/800 依次顺延。单字重的字体模式（35/45/55/65W、旗黑、系统默认）不受影响，
   用户在下拉里挑哪个就用哪个。 */
@font-face { font-family: ForumWenHeiDocs; src: url('/assets/fonts/HYWenHei-35W-6.woff2') format('woff2'); font-weight: 300; font-display: swap; }
@font-face { font-family: ForumWenHeiDocs; src: url('/assets/fonts/HYWenHei-35W-6.woff2') format('woff2'); font-weight: 400; font-display: swap; }
@font-face { font-family: ForumWenHeiDocs; src: url('/assets/fonts/HYWenHei-45W-5.woff2') format('woff2'); font-weight: 500; font-display: swap; }
@font-face { font-family: ForumWenHeiDocs; src: url('/assets/fonts/HYWenHei-55W-4.woff2') format('woff2'); font-weight: 600; font-display: swap; }
@font-face { font-family: ForumWenHeiDocs; src: url('/assets/fonts/HYWenHei-65W-3.woff2') format('woff2'); font-weight: 700; font-display: swap; }
@font-face { font-family: ForumWenHeiDocs; src: url('/assets/fonts/HYWenHei-75W-2.woff2') format('woff2'); font-weight: 800; font-display: swap; }

/* 字体模式：与论坛 body.font-mode-*（style.css:144-170）同一套类名 */
html.font-mode-brand, html.font-mode-wenhei { --font: ForumWenHeiDocs, var(--font-fallback); }
html.font-mode-wenhei35 { --font: ForumWenHei35, var(--font-fallback); }
html.font-mode-wenhei45 { --font: ForumWenHei45, var(--font-fallback); }
html.font-mode-wenhei55 { --font: ForumWenHei55, var(--font-fallback); }
html.font-mode-wenhei65 { --font: ForumWenHei65, var(--font-fallback); }
html.font-mode-wenhei75 { --font: ForumWenHei75, var(--font-fallback); }
html.font-mode-wenhei85 { --font: ForumWenHei85, var(--font-fallback); }
html.font-mode-qihei { --font: ForumQiHei, ForumWenHei, var(--font-fallback); }
html.font-mode-qihei65 { --font: ForumQiHei65, ForumWenHei, var(--font-fallback); }
html.font-mode-msyh { --font: ForumMsyh, var(--font-fallback); }
html.font-mode-system, html.font-mode-device { --font: var(--font-fallback); }
html.font-mode-mincho { --font: ForumMincho, "Songti SC", "SimSun", serif; }
html.font-mode-yphm { --font: ForumYPHM, var(--font-fallback); }
html.font-mode-serif_extralight { --font: ForumSerifFallback, "Songti SC", serif; font-weight: 200; }
html.font-mode-serif_light { --font: ForumSerifFallback, "Songti SC", serif; font-weight: 300; }
html.font-mode-serif_regular { --font: ForumSerifFallback, "Songti SC", serif; font-weight: 400; }
html.font-mode-serif_medium { --font: ForumSerifFallback, "Songti SC", serif; font-weight: 500; }
html.font-mode-serif_semibold { --font: ForumSerifFallback, "Songti SC", serif; font-weight: 500; }
html.font-mode-serif_bold { --font: ForumSerifFallback, "Songti SC", serif; font-weight: 700; }
html.font-mode-serif_heavy { --font: ForumSerifFallback, "Songti SC", serif; font-weight: 800; }

/* ── 顶栏的字体选择（本地偏好，优先级高于论坛设置）─────────────── */
.font-picker { display: flex; align-items: center; }
.font-picker select {
  height: 34px; padding: 0 8px; font-size: 12.5px; font-family: inherit;
  color: var(--text-2); background: var(--surface); border: 1px solid var(--border);
  border-radius: 9px; cursor: pointer; max-width: 132px;
}
.font-picker select:hover { border-color: var(--primary); color: var(--text); }
@media (max-width: 900px) { .font-picker { display: none; } }

/* ── 手机端 ────────────────────────────────────────────────────────────
   2026-09-26 在 390/360px 实测到的问题：
     ① .brand-text strong 没有 nowrap/ellipsis，顶栏空间不够时被压成 20px 宽 × 140px 高，
        整条 52px 的 sticky 顶栏被撑破，品牌文字上下各溢出 44/88px；
     ② .heading-link 默认 opacity:0、只在 :hover 显形，而触摸设备没有 hover ——
        它变成一个「看不见却点得到」的 9×18 区域；
     ③ 顶栏控件只有 34px 高、抽屉里的目录项 35px 高，手指点不准。
   这一节按触摸设备重写尺寸：控件 ≥40px、清单项 ≥44px；正文排版本身不动。 */

@media (hover: none) {
  /* 没有悬浮态，锚点就得常显；顺带用内边距把点击区从 9×18 撑到 20×24 */
  .heading-link { opacity: .5; padding: 3px 6px; margin-left: 4px; }
  /* 同理：只在桌面存在的悬浮反馈不必保留 */
  .doc tbody tr:hover { background: none; }
}

@media (max-width: 900px) {
  .topbar-inner { padding: 0 16px; gap: 10px; }
  /* 品牌文字必须能省略：它是顶栏里唯一没有宽度上限的弹性项 */
  .brand-text strong { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
  .brand-mark { width: 26px; height: 26px; border-radius: 7px; }
  /* 快捷键提示在手机上无意义，占的却是顶栏最贵的那几十像素 */
  .search-btn kbd { display: none; }
  .search-hint { display: none; }

  .icon-btn, .nav-toggle { width: 40px; height: 40px; }
  .icon-btn svg { width: 20px; height: 20px; }
  .search-btn { height: 40px; padding: 0 11px; }
  .forum-link { height: 40px; padding: 0 11px; }

  /* 抽屉目录：每一项做成 44px 高 */
  .sidebar { padding: 16px 14px 32px; }
  .sidebar-nav a { padding: 11px 10px; font-size: 14px; }
  .sidebar-book { display: block; padding: 8px 0; }
  .sidebar-books a { display: inline-block; padding: 8px 0; }
  .sidebar-foot { margin-top: 18px; }

  /* 正文：两侧留白收一点，把宽度还给文字 */
  .main-inner { padding: 22px 18px 72px; }
  .cover-list a { padding: 13px 14px; }
  .page-nav-link { padding: 13px 14px; }
  .callout { padding: 12px 14px; }
  .doc pre { padding: 12px 14px; }
  .doc table { font-size: 14px; }
  /* 表头允许换行：nowrap 会让「每日上限」这类表头把整列撑宽，把表格推出容器 */
  .doc th { white-space: normal; }
  .doc th, .doc td { padding: 9px 12px; }
  .table-wrap { -webkit-overflow-scrolling: touch; }

  /* 搜索遮罩：手机上没有可用的键盘快捷键，面板尽量往上靠，给结果留高度 */
  .search-overlay { padding: max(14px, env(safe-area-inset-top)) 12px 12px; }
  .search-results { max-height: 62vh; }
  .search-results a { padding: 12px; }
}


/* 从 API 域名（api.forum18.cn / api.forum18.top）跳过来时的提示：
   这些域名只服务脚本与 Agent，用浏览器打开会 301 到这里。
   由 docs.js 在带 ?from=api.* 参数时插入，正常读文档的人看不到。 */
.api-notice {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin: 0 0 22px;
  padding: 14px 16px;
  border: 1px solid var(--divider, rgba(128, 128, 128, .3));
  border-left: 4px solid var(--primary, #0d9488);
  border-radius: 10px;
  background: var(--card-bg, rgba(13, 148, 136, .06));
  font-size: 14.5px;
  line-height: 1.65;
}
.api-notice-text { flex: 1 1 auto; min-width: 0; }
.api-notice-text strong { display: block; margin-bottom: 4px; font-size: 15.5px; }
.api-notice-text span { display: block; color: var(--muted, #667085); }
.api-notice-text code { font-size: .92em; }
.api-notice-close {
  flex: 0 0 auto;
  padding: 5px 12px;
  border: 1px solid var(--divider, rgba(128, 128, 128, .3));
  border-radius: 999px;
  background: transparent;
  color: inherit;
  font: inherit;
  font-size: 13px;
  cursor: pointer;
}
.api-notice-close:hover { border-color: var(--primary, #0d9488); color: var(--primary, #0d9488); }
@media (max-width: 480px) {
  .api-notice { flex-direction: column; align-items: stretch; }
  .api-notice-close { align-self: flex-end; }
}
@media (max-width: 480px) {
  .topbar-inner { padding: 0 12px; gap: 8px; }
  .main-inner { padding: 18px 14px 64px; }
  .page-head h1 { font-size: 24px; }
  /* 极窄屏把「回论坛」让出来：页脚本来就有论坛入口，顶栏这点宽度要先保证站名与登录态不被挤没 */
  .forum-link:not(.is-login) { display: none; }
  /* 但「同步登录态」是修「在另一个域名登录着、这里却是游客」的入口，与「登录」同等重要：
     它是这一屏里唯一能把登录态取回来的按钮，极窄屏也留着（要挤先挤「回论坛」）。 */
  .forum-account .forum-link.is-sync { display: inline-flex; }
  .doc pre code { font-size: 12.5px; }
}