/* Shared editorial system: confirmed library and reading concepts, 2026-10-07. */
:root {
  --navy: #102b46;
  --ink: #102b46;
  --muted: #5e7368;
  --line: #e7e3d9;
  --surface: #fffefa;
  --soft: #f3f1eb;
  --max: 1328px;
  --ui: "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  --display: "Songti SC", STSong, Georgia, serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 24px; }
body { margin: 0; background: var(--surface); color: var(--ink); font-family: var(--ui); font-size: 17px; line-height: 1.75; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
button, input, select { font: inherit; }
button, a, input, select, summary { -webkit-tap-highlight-color: transparent; }
button, summary { cursor: pointer; }
img, video { max-width: 100%; }
svg { width: 24px; height: 24px; flex: none; fill: none; stroke: currentColor; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }
a, button, summary { transition: color .18s ease, background-color .18s ease, border-color .18s ease; }
a:hover { color: var(--muted); }
:focus-visible { outline: 2px solid var(--muted); outline-offset: 5px; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { color: var(--navy); font-family: var(--display); font-weight: 700; line-height: 1.35; }
h1 { letter-spacing: -.025em; }
h2 { font-size: 26px; }
.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; }
.skip-link { position: fixed; left: 20px; top: 12px; z-index: 20; transform: translateY(-170%); padding: 10px 18px; color: var(--surface); background: var(--navy); }
.skip-link:focus { transform: none; }
.header-inner, .footer-inner, .library-main { width: min(var(--max), calc(100% - 112px)); margin-inline: auto; }
.library-header { border-bottom: 1px solid var(--line); background: var(--surface); position: relative; z-index: 5; }
.header-inner { min-height: 80px; display: flex; align-items: center; justify-content: space-between; gap: 32px; }
.brand { display: flex; flex-direction: column; flex: none; color: var(--navy); line-height: 1.25; }
.brand-main { display: inline-flex; align-items: baseline; gap: 7px; font-family: Georgia, serif; font-size: 32px; font-weight: 400; letter-spacing: -.045em; white-space: nowrap; }
.brand-chinese { font-family: var(--display); font-size: .85em; font-weight: 500; letter-spacing: -.04em; }
.brand-sub { margin-top: 8px; color: var(--muted); font-size: 11px; letter-spacing: .08em; }
.site-nav { display: flex; align-items: center; gap: 40px; margin-left: auto; font-size: 16px; white-space: nowrap; }
.site-nav a { min-height: 44px; display: inline-flex; align-items: center; gap: 14px; }
.site-nav a[aria-current] { text-decoration: underline; text-underline-offset: 9px; text-decoration-thickness: 1px; }
.site-nav .nav-contact { margin-left: 70px; }
.site-menu { display: none; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 12px; min-height: 48px; border: 1px solid transparent; border-radius: 3px; padding: 11px 25px; font-size: 16px; font-weight: 500; line-height: 1.5; }
.button--navy { background: var(--navy); color: var(--surface); }
.button--navy:hover { background: var(--muted); color: var(--surface); }
.button--white { border-color: var(--muted); color: var(--muted); background: transparent; }
.button--white:hover { background: var(--soft); color: var(--navy); }
.library-main { padding-block: 28px 72px; min-height: 70vh; }
.breadcrumb { margin-bottom: 32px; color: var(--muted); font-size: 13px; }
.breadcrumb ol { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin: 0; padding: 0; list-style: none; }
.breadcrumb li+li::before { content: "/"; margin-right: 12px; color: var(--muted); }
.breadcrumb a { display: inline-block; padding-block: 3px; }
.library-intro { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.25fr); gap: 56px; align-items: center; padding-bottom: 30px; margin-bottom: 30px; border-bottom: 1px solid var(--line); }
.listing-heading h1 { font-size: clamp(40px, 3.75vw, 54px); margin-bottom: 15px; }
.listing-heading>p { margin-bottom: 0; color: var(--muted); font-size: 18px; line-height: 1.8; }
.library-discovery { min-width: 0; }
.search-form { margin: 0; }
.search-query { display: flex; min-height: 56px; }
.search-field { flex: 1; min-width: 0; display: flex; align-items: center; gap: 13px; padding-inline: 17px; border: 1px solid var(--line); border-radius: 3px 0 0 3px; color: var(--navy); }
.search-field input { width: 100%; min-width: 0; height: 54px; padding: 0; border: 0; background: transparent; color: var(--navy); font-size: 16px; }
.search-field:focus-within { outline: 2px solid var(--muted); outline-offset: 2px; position: relative; z-index: 1; }
.search-field input:focus-visible { outline: 0; }
.search-field input::placeholder { color: #69756f; opacity: 1; }
.search-query .button { border-radius: 0 3px 3px 0; min-width: 100px; }
.search-filters { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 12px; margin-top: 14px; }
.search-filters select { width: 100%; min-width: 0; min-height: 50px; padding: 10px 30px 10px 15px; border: 1px solid var(--line); border-radius: 3px; color: var(--navy); background: var(--surface); font-size: 15px; }
.region-picker { position: relative; min-width: 0; }
.region-picker summary { min-height: 50px; padding: 10px 15px; border: 1px solid var(--line); border-radius: 3px; font-size: 15px; }
.region-picker summary::marker { color: var(--muted); }
.region-picker ul { position: absolute; top: calc(100% + 6px); inset-inline: 0; z-index: 4; max-height: 320px; overflow-y: auto; list-style: none; margin: 0; padding: 7px 14px; border: 1px solid var(--line); border-radius: 3px; background: var(--surface); box-shadow: 0 5px 14px #102b4608; }
.region-picker li+li { border-top: 1px solid var(--line); }
.region-picker a { display: block; min-height: 44px; padding-block: 9px; font-size: 15px; }
.discovery-meta { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 8px 20px; margin-top: 17px; }
.result-count { margin: 0; color: var(--muted); font-family: var(--display); font-size: 23px; line-height: 1.5; font-variant-numeric: tabular-nums; }
.result-count:empty { display: none; }
.discovery-meta .read-link { margin-left: auto; }
.library-layout { display: grid; grid-template-columns: 240px minmax(0,1fr); gap: 40px; align-items: start; }
.listing-column, .article-column { min-width: 0; }
.library-sidebar { border-right: 1px solid var(--line); padding-right: 32px; }
.mobile-topics { display: none; }
.topic-nav h2 { font-size: 17px; font-family: var(--ui); font-weight: 500; margin-bottom: 13px; color: var(--muted); }
.topic-nav ul { list-style: none; margin: 0; padding: 0; }
.topic-nav li { border-bottom: 1px solid var(--line); }
.topic-nav li a { display: block; min-height: 54px; padding-block: 14px; font-size: 17px; overflow-wrap: anywhere; }
.topic-nav a[aria-current] { color: var(--muted); font-weight: 600; }
.all-topics { display: inline-flex; align-items: center; gap: 8px; min-height: 44px; margin-top: 14px; color: var(--muted); font-size: 14px; }
.consult-panel { margin-top: 36px; padding-top: 23px; border-top: 1px solid var(--line); }
.consult-panel h2 { font-size: 24px; margin-bottom: 12px; }
.consult-panel p { color: var(--muted); font-size: 14px; line-height: 1.85; margin-bottom: 18px; }
.consult-panel .button { padding-inline: 17px; font-size: 15px; }
.article-row { display: grid; grid-template-columns: minmax(0,1fr); gap: 28px; padding: 24px 0; border-bottom: 1px solid var(--line); }
.article-row:first-child { padding-top: 0; }
.article-row--media { grid-template-columns: minmax(0,1fr) minmax(200px, 30%); }
.article-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 5px 0; margin-bottom: 12px; color: var(--muted); font-size: 13px; line-height: 1.7; }
.article-meta>*+* { margin-left: 11px; padding-left: 11px; border-left: 1px solid var(--line); }
.article-row h2 { margin-bottom: 10px; font-family: var(--ui); font-size: 25px; font-weight: 600; line-height: 1.45; overflow-wrap: anywhere; }
.article-row h2 a:hover { text-decoration: underline; text-underline-offset: 5px; text-decoration-thickness: 1px; }
.article-row__excerpt { margin-bottom: 10px; color: #55616a; font-size: 16px; line-height: 1.8; overflow-wrap: anywhere; white-space: pre-line; }
.article-row__image { display: flex; align-items: center; justify-content: center; align-self: start; width: 100%; aspect-ratio: 16 / 9; background: var(--soft); border-radius: 3px; overflow: hidden; }
.article-row__image img { display: block; width: 100%; height: 100%; object-fit: contain; }
.article-row__actions { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 18px; }
.read-link { display: inline-flex; align-items: center; gap: 9px; min-height: 44px; color: var(--navy); font-size: 14px; }
.read-link:hover { color: var(--muted); text-decoration: underline; text-underline-offset: 5px; }
.media-note { color: var(--muted); font-size: 12px; }
.pagination { display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: 7px; margin-top: 32px; font-size: 14px; }
.page-number, .page-control { display: inline-flex; align-items: center; justify-content: center; min-width: 44px; min-height: 44px; padding: 8px 12px; border: 1px solid transparent; border-radius: 3px; font-variant-numeric: tabular-nums; }
.page-control { border-color: var(--muted); padding-inline: 17px; }
.page-number:hover, .page-control:hover { color: var(--muted); border-color: var(--muted); }
.page-number--current { background: var(--navy); border-color: var(--navy); color: var(--surface); }
.page-gap { color: var(--muted); padding-inline: 3px; }
.empty-state { padding: 44px 20px 52px; border-bottom: 1px solid var(--line); }
.empty-state h2 { font-size: 28px; margin-bottom: 13px; }
.empty-state p { max-width: 520px; margin-bottom: 16px; color: var(--muted); font-size: 16px; }
.no-script-note { padding-block: 18px; border-block: 1px solid var(--line); font-size: 14px; color: var(--muted); }
.search-status:not(.visually-hidden) { margin: 10px 0 0; color: var(--muted); font-size: 14px; }
.article-list { scroll-margin-top: 24px; }
.article-list[aria-busy="true"] { opacity: .6; }
.article-list:focus { outline: none; }
.search-retry { margin-top: 14px; }
.reading-page { max-width: 1140px; margin-inline: auto; }
.library-layout--article { grid-template-columns: minmax(0,1fr) 260px; gap: 56px; }
.article-heading { margin: 0 0 32px; padding-bottom: 23px; border-bottom: 1px solid var(--line); }
.article-heading h1 { font-size: clamp(40px, 3.34vw, 48px); line-height: 1.4; margin-bottom: 22px; overflow-wrap: anywhere; }
.article-heading .article-meta { font-size: 14px; margin-bottom: 0; }
.article-body { font-family: var(--ui); font-size: 19px; line-height: 1.85; overflow-wrap: anywhere; }
.article-body p { margin-bottom: 22px; white-space: pre-wrap; word-break: normal; }
.article-body .article-spacer { height: 10px; margin: 0; }
.content-pending { color: var(--muted); border-left: 2px solid var(--muted); padding-left: 18px; }
.article-media-list { margin-top: 32px; }
.article-media { margin: 0 0 30px; }
.original-image { display: block; width: fit-content; max-width: 100%; }
.original-image img { display: block; width: auto; max-width: 100%; height: auto; object-fit: contain; }
.article-media video { display: block; width: 100%; height: auto; aspect-ratio: var(--video-aspect, 16 / 9); max-height: min(72svh,720px); object-fit: contain; background: #000; }
.article-media figcaption { display: flex; flex-wrap: wrap; gap: 8px 22px; margin-top: 8px; color: var(--muted); font-size: 13px; }
.article-media figcaption a, .article-attachment a { display: inline-flex; align-items: center; gap: 9px; min-height: 44px; text-decoration: underline; text-underline-offset: 5px; }
.article-attachment { padding-block: 16px; border-block: 1px solid var(--line); font-size: 15px; }
.article-topic-link { margin-top: 32px; padding-top: 22px; border-top: 1px solid var(--line); font-size: 15px; color: var(--muted); }
.article-topic-link a { color: var(--navy); display: inline-block; padding-block: 8px; text-decoration: underline; text-underline-offset: 5px; }
.reading-sidebar { border-left: 1px solid var(--line); padding-left: 30px; }
.related-reading>h2 { font-size: 27px; margin-bottom: 13px; padding-bottom: 15px; border-bottom: 1px solid var(--line); }
.related-reading ul { margin: 0; padding: 0; list-style: none; }
.related-reading li a { display: flex; align-items: center; justify-content: space-between; gap: 15px; min-height: 64px; padding-block: 14px; font-size: 15px; line-height: 1.75; overflow-wrap: anywhere; }
.related-reading li+li { border-top: 1px solid var(--line); }
.related-versions { margin-top: 32px; padding-top: 22px; border-top: 1px solid var(--line); }
.related-versions h2 { font-size: 24px; margin-bottom: 10px; }
.related-versions ul { list-style: none; padding: 0; margin: 0; }
.related-versions li+li { border-top: 1px solid var(--line); }
.related-versions li a { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 48px; padding-block: 12px; font-size: 15px; overflow-wrap: anywhere; }
.video-watch-link { margin: 12px 0 0; }
.video-watch-link a { display: inline-block; min-height: 44px; padding-block: 8px; color: var(--muted); text-decoration: underline; text-underline-offset: 5px; }
.watch-page { max-width: 1040px; margin-inline: auto; }
.watch-page h1 { font-size: clamp(40px,3.34vw,48px); margin-bottom: 26px; overflow-wrap: anywhere; }
.watch-page>p { font-size: 18px; line-height: 1.85; }
.watch-page>section { margin-top: 32px; padding-top: 24px; border-top: 1px solid var(--line); }
.watch-page h2 { font-size: 27px; }
.watch-page ul { list-style: none; padding: 0; margin: 0; }
.watch-page section li+li { border-top: 1px solid var(--line); }
.watch-page section li a { padding-block: 12px; font-size: 16px; }
.library-footer { border-top: 1px solid var(--line); background: var(--surface); }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 28px; padding-block: 34px; }
.footer-inner .brand-main { font-size: 28px; }
.footer-inner nav { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 0 25px; font-size: 13px; color: var(--muted); }
.footer-inner nav a { display: inline-flex; align-items: center; min-height: 44px; }
@media (max-width:1200px) {
  .site-nav { gap: 21px; }
  .site-nav .nav-contact { margin-left: 20px; }
  .library-intro { gap: 35px; }
  .library-layout { gap: 30px; grid-template-columns: 220px minmax(0,1fr); }
  .library-layout--article { grid-template-columns: minmax(0,1fr) 245px; }
  .library-sidebar { padding-right: 24px; }
  .reading-sidebar { padding-left: 24px; }
  .article-row--media { grid-template-columns: minmax(0,1fr) minmax(170px,28%); }
  .article-row h2 { font-size: 23px; }
}
@media (max-width:1000px) {
  .header-inner, .footer-inner, .library-main { width: calc(100% - 64px); }
  .site-nav { display: none; }
  .site-menu { display: block; }
  .site-menu summary { display: flex; align-items: center; justify-content: center; width: 44px; height: 44px; padding: 0; color: var(--navy); border: 0; border-radius: 0; list-style: none; }
  .site-menu summary svg { width: 28px; height: 28px; fill: none; stroke: currentColor; stroke-width: 1.5; }
  .site-menu .close-glyph { display: none; }
  .site-menu[open] .menu-glyph { display: none; }
  .site-menu[open] .close-glyph { display: block; }
  .site-menu summary::-webkit-details-marker { display: none; }
  .site-menu[open] summary { color: var(--navy); background: transparent; }
  .site-menu nav { position: absolute; top: 100%; inset-inline: 0; display: flex; flex-direction: column; padding: 12px 32px 20px; border-bottom: 1px solid var(--line); background: var(--surface); }
  .site-menu nav a { display: block; min-height: 48px; padding-block: 10px; border-bottom: 1px solid var(--line); font-size: 16px; }
  .site-menu nav a:last-child { border: 0; }
  .library-intro { grid-template-columns: minmax(0,1fr); gap: 26px; }
  .listing-heading h1 { font-size: 44px; }
  .library-layout { grid-template-columns: 185px minmax(0,1fr); gap: 25px; }
  .library-layout--article { grid-template-columns: minmax(0,1fr); }
  .article-row--media { grid-template-columns: minmax(0,1fr) 145px; gap: 18px; }
  .article-row h2 { font-size: 22px; }
  .reading-sidebar { border-left: 0; border-top: 1px solid var(--line); padding: 27px 0 0; display: grid; grid-template-columns: minmax(0,1fr) minmax(0,.75fr); gap: 32px; }
  .reading-sidebar .consult-panel { margin-top: 0; padding-top: 0; border-top: 0; }
  .article-heading h1, .watch-page h1 { font-size: 40px; }
  .footer-inner { align-items: flex-start; }
  .footer-inner nav { max-width: 390px; }
}
@media (max-width:700px) {
  .header-inner, .footer-inner, .library-main { width: calc(100% - 40px); }
  .header-inner { min-height: 80px; gap: 12px; }
  .brand-main { font-size: 27px; gap: 5px; letter-spacing: -.05em; }
  .brand-chinese { font-size: .83em; }
  .site-menu summary { width: 44px; padding: 0; }
  .site-menu nav { padding-inline: 20px; }
  .library-main { padding-block: 20px 45px; }
  .breadcrumb { margin-bottom: 24px; font-size: 12px; }
  .breadcrumb ol { gap: 8px; }
  .breadcrumb li+li::before { margin-right: 8px; }
  .library-intro { gap: 22px; padding-bottom: 24px; margin-bottom: 24px; }
  .listing-heading h1 { font-size: 36px; margin-bottom: 13px; }
  .listing-heading>p { font-size: 17px; }
  .search-query { min-height: 52px; }
  .search-field { gap: 9px; padding-inline: 11px; }
  .search-field input { height: 50px; font-size: 15px; }
  .search-field svg { width: 21px; height: 21px; }
  .search-query .button { min-width: 70px; padding-inline: 16px; font-size: 15px; }
  .search-filters { gap: 9px; margin-top: 11px; }
  .search-filters select, .region-picker summary { font-size: 13px; padding-left: 10px; }
  .region-picker summary { padding-right: 9px; }
  .result-count { font-size: 21px; }
  .library-layout { grid-template-columns: minmax(0,1fr); gap: 25px; }
  .library-sidebar { padding: 0 0 16px; border-right: 0; border-bottom: 1px solid var(--line); }
  .desktop-topics { display: none; }
  .mobile-topics { display: block; }
  .mobile-topics summary { display: list-item; min-height: 44px; padding-block: 8px; font-size: 15px; color: var(--muted); }
  .mobile-topics .topic-nav { margin-top: 10px; }
  .mobile-topics .topic-nav h2 { display: none; }
  .library-sidebar .topic-nav h2 { font-size: 14px; margin-bottom: 8px; }
  .library-sidebar .topic-nav ul { display: flex; flex-wrap: wrap; gap: 0 16px; }
  .library-sidebar .topic-nav li { border-bottom: 0; }
  .library-sidebar .topic-nav li a { min-height: 44px; padding-block: 8px; font-size: 14px; }
  .library-sidebar .all-topics { margin-top: 2px; }
  .library-sidebar .consult-panel { display: none; }
  .article-row { gap: 15px; padding-block: 22px; }
  .article-row--media { grid-template-columns: minmax(0,1fr) 105px; }
  .article-row__image { margin-top: 4px; aspect-ratio: 1 / 1; }
  .article-row h2 { font-size: 20px; }
  .article-row__excerpt { font-size: 15px; line-height: 1.8; }
  .article-meta { font-size: 12px; margin-bottom: 9px; }
  .article-meta>*+* { margin-left: 8px; padding-left: 8px; }
  .article-row__actions { gap: 4px 10px; }
  .read-link { font-size: 13px; gap: 7px; }
  .read-link svg { width: 20px; height: 20px; }
  .media-note { font-size: 11px; }
  .pagination { gap: 3px; font-size: 13px; margin-top: 26px; }
  .page-number, .page-control { padding-inline: 8px; }
  .page-control { flex-basis: auto; }
  .article-heading { margin-bottom: 27px; padding-bottom: 20px; }
  .article-heading h1, .watch-page h1 { font-size: 33px; line-height: 1.4; margin-bottom: 19px; }
  .article-heading .article-meta { font-size: 13px; }
  .article-body { font-size: 17px; line-height: 1.85; }
  .article-body p { margin-bottom: 21px; }
  .article-media-list { margin-top: 27px; }
  .article-media { margin-bottom: 24px; }
  .article-media video { max-height: min(65svh,620px); }
  .reading-sidebar { grid-template-columns: minmax(0,1fr); gap: 28px; }
  .reading-sidebar .consult-panel { padding-top: 24px; border-top: 1px solid var(--line); }
  .related-reading>h2 { font-size: 25px; }
  .related-reading li a { min-height: 54px; }
  .watch-page>p { font-size: 17px; }
  .watch-page section li a { font-size: 15px; }
  .footer-inner { flex-direction: column; gap: 22px; padding-block: 29px; }
  .footer-inner nav { max-width: none; justify-content: flex-start; gap: 0 20px; }
  .footer-inner .brand-main { font-size: 26px; }
  .empty-state { padding: 28px 0 36px; }
  .empty-state h2 { font-size: 25px; }
}
@media (max-width:370px) {
  .brand-main { font-size: 24px; }
  .article-row--media { grid-template-columns: minmax(0,1fr) 90px; gap: 12px; }
  .article-row h2 { font-size: 19px; }
  .search-filters { grid-template-columns: minmax(0,1fr); }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}