@font-face {
  font-family: "BabelStone Han";
  src: url("/assets/fonts/BabelStoneHan.woff2") format("woff2");
  font-display: swap;
}

:root {
  color: #e9e0cc;
  background: #06111d;
  font-family: "Source Han Sans SC", "Noto Sans CJK SC", "PingFang SC", "Microsoft YaHei", "BabelStone Han", system-ui, sans-serif;
  font-synthesis: none;
  --font-display: "Noto Serif SC", "BabelStone Han", "Songti SC", "STSong", serif;
  --ink: #06111d;
  --ink-soft: #0b1b2a;
  --panel: rgba(11, 27, 42, 0.82);
  --paper: #e9e0cc;
  --muted: #93a3a8;
  --jade: #a8d7ce;
  --jade-strong: #c5eee2;
  --gold: #c9a974;
  --gold-soft: #8d7655;
  --line: rgba(201, 169, 116, 0.23);
  --line-soft: rgba(168, 215, 206, 0.14);
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  background: var(--ink);
  color: var(--paper);
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

a:focus-visible,
summary:focus-visible {
  outline: 1px solid var(--jade);
  outline-offset: 4px;
}

img {
  max-width: 100%;
}

.knowledge-skip-link {
  position: fixed;
  z-index: 100;
  top: 10px;
  left: 10px;
  padding: 10px 14px;
  background: var(--paper);
  color: var(--ink);
  transform: translateY(-160%);
}

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

.knowledge-shell {
  position: relative;
  min-height: 100vh;
  overflow: clip;
  background-image: linear-gradient(rgba(5, 14, 24, 0.91), rgba(5, 14, 24, 0.96)), url("/assets/co-creation-world.png");
  background-position: center top;
  background-repeat: no-repeat;
  background-size: 1700px auto;
  background-attachment: fixed;
}

.knowledge-site-header {
  position: sticky;
  z-index: 30;
  top: 0;
  min-height: 76px;
  padding: 12px max(24px, calc((100vw - var(--max)) / 2));
  display: grid;
  grid-template-columns: 176px minmax(0, 1fr) auto;
  gap: 28px;
  align-items: center;
  border-bottom: 1px solid var(--line);
  background: rgba(5, 14, 24, 0.88);
  backdrop-filter: blur(18px);
}

.knowledge-brand {
  display: block;
  width: 164px;
}

.knowledge-brand img {
  display: block;
  width: 100%;
  height: auto;
}

.knowledge-nav {
  min-width: 0;
  display: flex;
  gap: 6px;
  align-items: center;
  overflow-x: auto;
  scrollbar-width: none;
}

.knowledge-nav::-webkit-scrollbar {
  display: none;
}

.knowledge-nav a,
.knowledge-site-return {
  min-height: 38px;
  padding: 0 10px;
  display: inline-flex;
  gap: 6px;
  align-items: center;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.knowledge-nav a:hover,
.knowledge-site-return:hover {
  color: var(--jade-strong);
}

.knowledge-nav small {
  color: var(--gold-soft);
  font-size: 9px;
}

.knowledge-site-return {
  border: 1px solid var(--line);
}

.knowledge-preview-banner {
  padding: 9px 20px;
  border-bottom: 1px solid rgba(201, 169, 116, 0.3);
  background: rgba(91, 58, 27, 0.28);
  color: #dbc59e;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-align: center;
}

.knowledge-main {
  width: min(var(--max), calc(100% - 48px));
  margin: 0 auto;
  padding: 34px 0 96px;
}

.knowledge-breadcrumb {
  display: flex;
  gap: 10px;
  align-items: center;
  color: var(--muted);
  font-size: 12px;
}

.knowledge-breadcrumb a:hover {
  color: var(--jade);
}

.knowledge-breadcrumb strong {
  color: var(--gold);
  font-weight: 400;
}

.knowledge-entity {
  margin-top: 26px;
}

.knowledge-hero {
  min-height: 390px;
  padding: clamp(34px, 5vw, 66px);
  display: grid;
  align-items: center;
  border: 1px solid var(--line);
  background: rgba(7, 20, 32, 0.8);
}

.knowledge-hero.has-image {
  grid-template-columns: minmax(0, 1fr) minmax(300px, 0.72fr);
  gap: clamp(36px, 6vw, 78px);
}

.knowledge-eyebrow,
.knowledge-section > header span,
.knowledge-answer > span,
.knowledge-aside > span {
  color: var(--gold);
  font-size: 10px;
  letter-spacing: 0.24em;
}

.knowledge-hero h1,
.knowledge-directory-header h1,
.knowledge-not-found h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-size: clamp(44px, 6vw, 76px);
  font-weight: 500;
  letter-spacing: 0.08em;
  line-height: 1.08;
}

.knowledge-pinyin {
  margin: 14px 0 0;
  color: var(--jade);
  font-family: var(--font-display);
  font-size: 17px;
  letter-spacing: 0.14em;
}

.knowledge-aliases {
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.8;
}

.knowledge-aliases span {
  margin-right: 12px;
  color: var(--gold-soft);
}

.knowledge-source-located,
.knowledge-source-layer {
  margin: 12px 0 0;
  color: var(--gold-soft);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.knowledge-source-layer {
  color: var(--jade);
}

.knowledge-lead {
  max-width: 680px;
  margin: 28px 0 0;
  color: #c9c5b9;
  font-family: var(--font-display);
  font-size: clamp(17px, 2vw, 22px);
  line-height: 1.9;
}

.knowledge-hero-image {
  margin: 0;
  border: 1px solid var(--line-soft);
  background: var(--ink-soft);
}

.knowledge-hero-image img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.knowledge-hero-image figcaption,
.knowledge-gallery figcaption {
  padding: 13px 15px;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.6;
}

.knowledge-hero-image figcaption span,
.knowledge-gallery figcaption span {
  margin-right: 9px;
  color: var(--gold);
}

.knowledge-answer {
  position: relative;
  margin: -1px 0 0;
  padding: 30px clamp(30px, 5vw, 62px);
  display: grid;
  grid-template-columns: minmax(190px, 0.35fr) minmax(0, 1fr);
  gap: 8px 34px;
  align-items: start;
  border: 1px solid rgba(168, 215, 206, 0.24);
  background: rgba(14, 39, 51, 0.78);
}

.knowledge-answer > span {
  grid-row: span 2;
  padding-top: 8px;
  color: var(--jade);
}

.knowledge-answer h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 500;
}

.knowledge-answer p {
  margin: 4px 0 0;
  color: #d0d2ca;
  font-size: 15px;
  line-height: 1.9;
}

.knowledge-content-grid {
  margin-top: 72px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 210px;
  gap: clamp(42px, 7vw, 92px);
  align-items: start;
}

.knowledge-content {
  min-width: 0;
}

.knowledge-section {
  padding: 0 0 68px;
  scroll-margin-top: 110px;
}

.knowledge-section + .knowledge-section {
  padding-top: 64px;
  border-top: 1px solid var(--line);
}

.knowledge-section > header {
  margin-bottom: 30px;
}

.knowledge-section > header h2 {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-size: clamp(30px, 4vw, 46px);
  font-weight: 500;
  letter-spacing: 0.05em;
}

.knowledge-section > p {
  margin: 0 0 18px;
  color: #c8c8bf;
  font-size: 15px;
  line-height: 2;
}

.knowledge-aside {
  position: sticky;
  top: 112px;
  padding: 24px 0;
  display: grid;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.knowledge-aside > span {
  margin-bottom: 14px;
}

.knowledge-aside > a {
  padding: 9px 0;
  color: var(--muted);
  font-size: 12px;
}

.knowledge-aside > a:hover {
  color: var(--jade);
}

.knowledge-aside small {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--line-soft);
  color: rgba(147, 163, 168, 0.58);
  font-size: 8px;
  line-height: 1.7;
  word-break: break-all;
}

.knowledge-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 0;
  border-top: 1px solid var(--line);
}

.knowledge-facts > div {
  min-height: 72px;
  padding: 18px 20px;
  display: grid;
  grid-template-columns: 108px minmax(0, 1fr);
  gap: 14px;
  border-right: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

.knowledge-facts > div:nth-child(even) {
  border-right: 0;
}

.knowledge-facts dt {
  color: var(--gold-soft);
  font-size: 11px;
}

.knowledge-facts dd {
  margin: 0;
  color: #d3d1c7;
  font-size: 13px;
  line-height: 1.7;
}

.knowledge-fact-note,
.knowledge-relation-note {
  margin-top: 18px !important;
  color: var(--muted) !important;
  font-size: 11px !important;
}

.knowledge-citations {
  display: grid;
  gap: 18px;
}

.knowledge-citation {
  padding: clamp(24px, 4vw, 42px);
  border: 1px solid var(--line);
  background: rgba(7, 20, 32, 0.68);
}

details.knowledge-citation > summary {
  color: var(--jade);
  cursor: pointer;
  font-family: var(--font-display);
  font-size: 15px;
  line-height: 1.7;
}

details.knowledge-citation[open] > summary {
  margin-bottom: 28px;
}

.knowledge-citation-meta {
  display: flex;
  gap: 18px;
  justify-content: space-between;
  align-items: center;
}

.knowledge-citation-meta strong {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 500;
}

.knowledge-citation-meta span {
  padding: 4px 8px;
  border: 1px solid var(--line);
  font-size: 9px;
  white-space: nowrap;
}

.knowledge-citation-meta .is-verified {
  border-color: rgba(168, 215, 206, 0.4);
  color: var(--jade);
}

.knowledge-citation-meta .is-pending {
  color: var(--gold-soft);
}

.knowledge-citation blockquote {
  margin: 28px 0 0;
  padding: 0 0 0 22px;
  border-left: 2px solid var(--gold);
  color: #e2d8c5;
  font-family: var(--font-display);
  font-size: 17px;
  line-height: 2;
}

.knowledge-citation blockquote p,
.knowledge-translation p {
  margin: 0 0 14px;
}

.knowledge-translation {
  margin-top: 26px;
  padding-top: 24px;
  border-top: 1px solid var(--line-soft);
  color: #c4cbc5;
  font-size: 14px;
  line-height: 1.9;
}

.knowledge-translation > span {
  display: block;
  margin-bottom: 10px;
  color: var(--jade);
  font-size: 10px;
  letter-spacing: 0.16em;
}

.knowledge-editor-note {
  color: var(--muted);
  font-size: 11px;
  line-height: 1.8;
}

.knowledge-source-link {
  width: fit-content;
  margin-top: 16px;
  display: inline-flex;
  color: var(--gold);
  font-size: 12px;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.knowledge-source-empty,
.knowledge-empty {
  padding: 32px;
  border: 1px solid var(--line);
  color: var(--muted);
  line-height: 1.8;
}

.knowledge-gallery {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.knowledge-gallery figure {
  margin: 0;
  border: 1px solid var(--line-soft);
  background: var(--ink-soft);
}

.knowledge-gallery img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.knowledge-relations {
  display: grid;
  gap: 28px;
}

.knowledge-relations section h3 {
  margin: 0 0 12px;
  color: var(--gold-soft);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.1em;
}

.knowledge-relations ul {
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  list-style: none;
}

.knowledge-relations a {
  min-height: 68px;
  padding: 14px 16px;
  display: grid;
  align-content: center;
  border: 1px solid var(--line-soft);
  background: rgba(10, 29, 43, 0.5);
}

.knowledge-relations a:hover {
  border-color: rgba(168, 215, 206, 0.4);
}

.knowledge-relations a span {
  color: var(--muted);
  font-size: 9px;
}

.knowledge-relations a strong {
  margin-top: 5px;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 500;
}

.knowledge-directory-header {
  min-height: 320px;
  padding: 52px 0 54px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 0.55fr);
  align-items: end;
  border-bottom: 1px solid var(--line);
}

.knowledge-directory-header > span,
.knowledge-directory-header > h1 {
  grid-column: 1;
}

.knowledge-directory-header > p {
  grid-column: 1;
  max-width: 680px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.9;
}

.knowledge-directory-header dl {
  grid-column: 2;
  grid-row: 1 / span 3;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-self: end;
  border-top: 1px solid var(--line);
}

.knowledge-directory-header dl > div {
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.knowledge-directory-header dt {
  color: var(--muted);
  font-size: 10px;
}

.knowledge-directory-header dd {
  margin: 7px 0 0;
  color: var(--gold);
  font-family: var(--font-display);
  font-size: 26px;
}

.knowledge-card-grid {
  margin-top: 52px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.knowledge-card {
  min-height: 280px;
  display: grid;
  border: 1px solid var(--line-soft);
  background: rgba(8, 22, 34, 0.72);
}

.knowledge-card.has-image {
  grid-template-rows: 190px 1fr;
}

.knowledge-card-image {
  display: block;
  overflow: hidden;
  border-bottom: 1px solid var(--line-soft);
}

.knowledge-card-image img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.knowledge-card > div {
  padding: 24px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.knowledge-card > div > span {
  color: var(--gold-soft);
  font-size: 9px;
  letter-spacing: 0.14em;
}

.knowledge-card h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: 25px;
  font-weight: 500;
}

.knowledge-card h2 a:hover {
  color: var(--jade-strong);
}

.knowledge-card small {
  margin-top: 7px;
  color: var(--jade);
}

.knowledge-card p {
  margin: 18px 0 22px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.8;
}

.knowledge-card-link {
  margin-top: auto;
  color: var(--gold);
  font-size: 11px;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.knowledge-api-catalog {
  margin-top: 52px;
}

.knowledge-api-card-grid {
  margin-top: 20px;
}

.knowledge-api-method {
  margin-top: auto;
  padding: 7px 9px;
  border: 1px solid var(--line);
  background: rgba(4, 13, 22, 0.82);
  color: var(--gold);
  font-family: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  font-size: 11px;
  overflow-wrap: anywhere;
}

.knowledge-api-examples {
  max-width: 100%;
  margin: 22px 0 0;
  padding: 18px 20px;
  overflow-x: auto;
  border: 1px solid var(--line);
  background: rgba(4, 13, 22, 0.82);
}

.knowledge-api-code {
  display: block;
  min-width: max-content;
  color: var(--jade-strong);
  font-family: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  font-size: 12px;
  line-height: 1.8;
  white-space: pre;
}

.knowledge-pagination {
  margin-top: 42px;
  display: flex;
  gap: 18px;
  justify-content: center;
  align-items: center;
}

.knowledge-pagination a,
.knowledge-primary-link {
  min-height: 42px;
  padding: 0 18px;
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--line);
  color: var(--jade);
  font-size: 12px;
}

.knowledge-pagination span {
  color: var(--muted);
  font-size: 11px;
}

.knowledge-empty {
  margin-top: 52px;
}

.knowledge-empty h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 500;
}

.knowledge-empty p {
  margin: 12px 0 0;
}

.knowledge-not-found {
  min-height: calc(100vh - 76px);
  display: grid;
  align-content: center;
  justify-items: start;
}

.knowledge-not-found p {
  margin: 22px 0 30px;
  color: var(--muted);
}

.knowledge-footer {
  padding: 52px max(24px, calc((100vw - var(--max)) / 2));
  display: grid;
  grid-template-columns: 170px minmax(260px, 1fr) auto;
  gap: 42px;
  align-items: center;
  border-top: 1px solid var(--line);
  background: rgba(4, 13, 22, 0.9);
}

.knowledge-footer img {
  width: 164px;
}

.knowledge-footer p {
  max-width: 560px;
  margin: 0;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.8;
}

.knowledge-footer nav {
  display: flex;
  gap: 18px;
  color: var(--gold-soft);
  font-size: 10px;
  white-space: nowrap;
}

@media (max-width: 960px) {
  .knowledge-site-header {
    grid-template-columns: 160px minmax(0, 1fr);
  }

  .knowledge-site-return {
    display: none;
  }

  .knowledge-hero.has-image,
  .knowledge-directory-header {
    grid-template-columns: 1fr;
  }

  .knowledge-hero-image {
    max-width: 620px;
  }

  .knowledge-directory-header dl {
    grid-column: 1;
    grid-row: auto;
    margin-top: 30px;
  }

  .knowledge-content-grid {
    grid-template-columns: 1fr;
  }

  .knowledge-aside {
    display: none;
  }

  .knowledge-card-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .knowledge-footer {
    grid-template-columns: 160px minmax(0, 1fr);
  }

  .knowledge-footer nav {
    grid-column: 1 / -1;
  }
}

@media (max-width: 640px) {
  html {
    scroll-behavior: auto;
  }

  .knowledge-shell {
    background-attachment: scroll;
    background-size: 1100px auto;
  }

  .knowledge-site-header {
    min-height: 68px;
    padding: 10px 16px;
    grid-template-columns: 134px minmax(0, 1fr);
    gap: 14px;
  }

  .knowledge-brand {
    width: 132px;
  }

  .knowledge-nav a {
    padding: 0 7px;
    font-size: 11px;
  }

  .knowledge-nav small {
    display: none;
  }

  .knowledge-main {
    width: min(100% - 28px, var(--max));
    padding-top: 24px;
  }

  .knowledge-hero {
    min-height: 0;
    padding: 30px 24px;
  }

  .knowledge-hero.has-image {
    gap: 30px;
  }

  .knowledge-hero h1,
  .knowledge-directory-header h1,
  .knowledge-not-found h1 {
    font-size: clamp(38px, 13vw, 56px);
  }

  .knowledge-lead {
    font-size: 16px;
  }

  .knowledge-answer {
    padding: 24px;
    grid-template-columns: 1fr;
  }

  .knowledge-answer > span {
    grid-row: auto;
  }

  .knowledge-content-grid {
    margin-top: 50px;
  }

  .knowledge-section,
  .knowledge-section + .knowledge-section {
    padding-top: 44px;
    padding-bottom: 50px;
  }

  .knowledge-section:first-child {
    padding-top: 0;
  }

  .knowledge-facts,
  .knowledge-gallery,
  .knowledge-relations ul,
  .knowledge-card-grid {
    grid-template-columns: 1fr;
  }

  .knowledge-facts > div,
  .knowledge-facts > div:nth-child(even) {
    grid-template-columns: 96px minmax(0, 1fr);
    border-right: 0;
  }

  .knowledge-citation {
    padding: 24px 20px;
  }

  .knowledge-citation-meta {
    align-items: flex-start;
  }

  .knowledge-citation blockquote {
    font-size: 15px;
  }

  .knowledge-directory-header {
    min-height: 0;
    padding: 38px 0;
  }

  .knowledge-directory-header dl {
    grid-template-columns: 1fr 1fr;
  }

  .knowledge-card-grid {
    margin-top: 36px;
  }

  .knowledge-footer {
    padding: 38px 20px;
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .knowledge-footer nav {
    grid-column: auto;
    flex-wrap: wrap;
    white-space: normal;
  }
}

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