:root {
  --max-width: 860px;
  --sidebar-width: 220px;
  --sidebar-gap: 28px;
  --text: #1a1a1a;
  --muted: #5c6370;
  --bg: #ffffff;
  --rule: #e5e5e5;
  --accent: #0055aa;
  --accent-hover: #003d7a;
  --chip-bg: #f2f4f7;
  --radius: 4px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue",
    Helvetica, Arial, sans-serif;
  --font-serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Songti SC",
    "Noto Serif SC", Georgia, serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--bg);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.72;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.15s ease;
}

a:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

/* ───────── Top navigation ───────── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(8px);
  -webkit-backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--rule);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0.9rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.nav-brand {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: 0.01em;
}

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

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: var(--muted);
  font-size: 0.95rem;
}

.nav-links a.active,
.nav-links a:hover {
  color: var(--text);
  text-decoration: none;
}

.lang-toggle {
  border: 1px solid var(--rule);
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius);
  font-size: 0.85rem;
  color: var(--muted);
}

.lang-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: none;
}

/* ───────── Main layout ───────── */
main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
}

section {
  padding: 1.5rem 0 2rem;
}

section + section {
  border-top: 1px solid var(--rule);
}

h1,
h2,
h3 {
  color: var(--text);
  line-height: 1.3;
  margin: 0 0 0.75rem;
}

h2 {
  font-size: 1.6rem;
  font-weight: 600;
  letter-spacing: -0.005em;
  margin-top: 0.5rem;
  margin-bottom: 1.25rem;
}

h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin: 1.75rem 0 1rem;
  padding-bottom: 0.35rem;
  border-bottom: 1px solid var(--rule);
}

p {
  margin: 0.6rem 0;
}

section[id],
.kc-subsection {
  scroll-margin-top: 88px;
}

/* ───────── Hero / About ───────── */
.hero {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
}

.hero-avatar {
  flex: 0 0 160px;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  overflow: hidden;
  background: var(--chip-bg);
  border: 1px solid var(--rule);
}

.hero-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.hero-body {
  flex: 1 1 auto;
  min-width: 0;
}

.hero-name {
  font-size: clamp(2rem, 3vw, 2.45rem);
  font-weight: 700;
  margin: 0 0 0.25rem;
}

.hero-title {
  color: var(--muted);
  font-size: 1.02rem;
  margin: 0 0 0.25rem;
}

.hero-contact {
  color: var(--muted);
  font-size: 0.95rem;
  margin: 0 0 0.75rem;
}

.hero-contact a {
  color: var(--muted);
}

.hero-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0.75rem;
  margin: 0.5rem 0 0;
  padding: 0;
  list-style: none;
}

.hero-links a {
  display: inline-flex;
  flex-direction: row;
  align-items: center;
  gap: 0.38rem;
  padding: 0.25rem 0.7rem;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  font-size: 0.88rem;
  line-height: 1;
  white-space: nowrap;
  color: var(--muted);
}

.hero-link-icon {
  width: 1em;
  height: 1em;
  display: inline-block;
  flex-shrink: 0;
  vertical-align: middle;
}

.hero-links a span {
  display: inline-block;
  line-height: 1;
}

.hero-links a:hover {
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: none;
}

.about-bio {
  margin-top: 1.5rem;
  font-size: 1.06rem;
  color: var(--text);
}

/* ───────── Hero notice (call for collaboration) ───────── */
.hero-notice {
  margin-top: 1.25rem;
  padding: 0.75rem 1rem;
  background: #fff8e6;
  border-left: 3px solid #e0a800;
  border-radius: var(--radius);
  color: var(--text);
  font-size: 1rem;
}

.hero-notice::before {
  content: "📌 ";
}

/* ───────── Publications ───────── */
.pub-group {
  margin-bottom: 1.5rem;
}

.pub {
  display: flex;
  gap: 1.25rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--rule);
}

.pub:last-child {
  border-bottom: none;
}

.pub-thumb {
  position: relative;
  flex: 0 0 180px;
  width: 180px;
  height: 120px;
  overflow: hidden;
  background: var(--chip-bg);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
}

.pub-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* Venue tag on top-left of thumbnail */
.pub-tag {
  position: absolute;
  top: 6px;
  left: 6px;
  display: inline-block;
  padding: 2px 7px;
  background: rgba(26, 29, 38, 0.85);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  line-height: 1.4;
  border-radius: 3px;
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
}

.pub-thumb--oral .pub-tag {
  top: 34px;
}

.pub-tag-oral {
  position: absolute;
  top: 6px;
  left: 6px;
  display: inline-block;
  padding: 2px 7px;
  background: rgba(185, 28, 28, 0.92);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  line-height: 1.4;
  border-radius: 3px;
  text-transform: uppercase;
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
}

.pub-body {
  flex: 1 1 auto;
  min-width: 0;
}

.pub-title {
  font-size: 1.08rem;
  font-weight: 600;
  margin: 0 0 0.25rem;
}

.pub-title a {
  color: var(--text);
}

.pub-title a:hover {
  color: var(--accent);
}

.pub-authors {
  color: var(--muted);
  font-size: 0.97rem;
  margin: 0 0 0.25rem;
}

.pub-authors .me {
  color: var(--text);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.pub-venue {
  font-style: italic;
  color: var(--muted);
  font-size: 0.97rem;
  margin: 0 0 0.4rem;
}

.pub-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.pub-links a {
  display: inline-block;
  font-size: 0.88rem;
  padding: 0.1rem 0.55rem;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  color: var(--muted);
  background: #fafbfc;
}

.pub-links a:hover {
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: none;
}

/* ───────── Page sidebar ───────── */
.page-sidebar {
  position: fixed;
  top: 92px;
  left: max(24px, calc(50vw - (var(--max-width) / 2) - var(--sidebar-width) - var(--sidebar-gap)));
  width: var(--sidebar-width);
  max-height: calc(100vh - 116px);
  overflow-y: auto;
  z-index: 50;
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid var(--rule);
  border-radius: 6px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
  padding: 0.9rem 1rem;
  transition: opacity 0.25s ease;
}

.page-sidebar h4 {
  margin: 0 0 0.6rem;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.page-sidebar ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.page-sidebar a {
  display: block;
  padding: 0.35rem 0.5rem;
  font-size: 0.95rem;
  color: var(--text);
  border-radius: 4px;
  border-left: 2px solid transparent;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.page-sidebar a.active,
.page-sidebar a:hover {
  background: var(--chip-bg);
  border-left-color: var(--accent);
  color: var(--accent);
  text-decoration: none;
}

.page-sidebar .sidebar-subitem a {
  padding-left: 1rem;
  font-size: 0.88rem;
  color: var(--muted);
}

.page-sidebar .sidebar-hint {
  margin-top: 0.5rem;
  font-size: 0.72rem;
  color: var(--text-hint, #b8bcc8);
  line-height: 1.4;
}

/* ───────── Knowledge Context ───────── */
.section-lead {
  max-width: 760px;
  color: var(--muted);
}

.kc-subsection {
  padding: 1.4rem 0 1.8rem;
}

.kc-subsection + .kc-subsection {
  border-top: 1px solid var(--rule);
}

.kc-section-head {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.9rem;
}

.kc-section-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.75rem;
  height: 1.75rem;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent);
  background: #eaf2fb;
  flex-shrink: 0;
}

.kc-section-title {
  margin: 0;
  font-size: 1.08rem;
  font-weight: 600;
}

.kc-section-line {
  flex: 1;
  height: 1px;
  background: var(--rule);
}

.kc-desc {
  max-width: 780px;
  color: var(--muted);
}

.kc-observation-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.9rem;
  margin-top: 1rem;
}

.kc-observation-card {
  border: 1px solid var(--rule);
  border-radius: 10px;
  overflow: hidden;
  background: #fff;
}

.kc-observation-main {
  padding: 0.95rem 1rem 0.85rem;
}

.kc-observation-label {
  margin-bottom: 0.45rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.kc-observation-label--semantic {
  color: var(--accent);
}

.kc-observation-text {
  font-size: 0.93rem;
  line-height: 1.7;
}

.kc-context-box {
  padding: 0.8rem 1rem 0.9rem;
  background: #f8fafc;
  border-top: 1px solid var(--rule);
}

.kc-context-box .kc-observation-label {
  color: var(--muted);
}

.kc-context-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.kc-context-tag {
  display: inline-flex;
  gap: 0.25rem;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  background: #eaf2fb;
  color: var(--accent);
  font-size: 0.78rem;
  line-height: 1.5;
}

.kc-context-tag strong {
  font-weight: 600;
}

.kc-callout {
  margin-top: 1rem;
  padding: 1rem 1.1rem;
  border: 1px solid #ebe4d9;
  border-radius: 10px;
  background: #fcf8f1;
}

.kc-callout-title {
  margin: 0 0 0.35rem;
  font-size: 0.98rem;
  font-weight: 600;
}

.kc-callout p {
  color: var(--muted);
}

.kc-callout-ref {
  margin-top: 0.5rem;
  font-size: 0.82rem;
  color: var(--muted);
  font-style: italic;
}

.kc-mapping {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1rem;
  margin-top: 0.8rem;
}

.kc-mapping-item {
  font-size: 0.82rem;
  color: var(--muted);
}

.kc-mapping-item strong {
  color: var(--accent);
}

.kc-goal-box {
  margin: 1rem 0 1.15rem;
  padding: 0.9rem 1rem;
  background: #fff8e6;
  border: 1px solid #f0d9a8;
  border-radius: 10px;
}

.kc-goal-box strong {
  display: block;
  margin-bottom: 0.25rem;
}

.kc-comparison {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.kc-panel {
  border: 1px solid var(--rule);
  border-radius: 10px;
  padding: 1.1rem 1rem;
}

.kc-panel--highlight {
  background: #f2fbf9;
  border-color: #cfe7e2;
}

.kc-badge {
  display: inline-block;
  margin-bottom: 0.6rem;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  background: var(--chip-bg);
  color: var(--muted);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.kc-panel--highlight .kc-badge {
  background: #dff4ef;
  color: #196f68;
}

.kc-panel h4 {
  margin: 0 0 0.35rem;
  font-size: 1rem;
}

.kc-panel p {
  color: var(--muted);
}

.kc-token-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  margin-top: 0.75rem;
  padding: 0.85rem;
  border: 1px solid var(--rule);
  border-radius: 8px;
  background: #fafbfc;
}

.kc-token {
  padding: 0.2rem 0.55rem;
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--muted);
  background: #e9edf2;
}

.kc-token--context {
  background: #eaf2fb;
  color: var(--accent);
}

.kc-token--context-alt {
  background: #e9f7f5;
  color: #1b7a70;
}

.kc-token-sep {
  color: #9aa3b2;
  font-size: 0.8rem;
}

.kc-roadmap {
  display: grid;
  gap: 0.9rem;
  margin-top: 1rem;
}

.kc-roadmap-item {
  display: grid;
  grid-template-columns: 132px 1fr;
  gap: 1rem;
  padding: 1rem;
  background: #fafbfc;
  border: 1px solid var(--rule);
  border-left: 3px solid var(--accent);
  border-radius: 10px;
}

.kc-roadmap-item--teal {
  border-left-color: #1b7a70;
}

.kc-roadmap-item--orange {
  border-left-color: #c26d12;
}

.kc-roadmap-figure {
  width: 132px;
  min-height: 108px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.8rem;
  border: 1px dashed #d8dee8;
  border-radius: 8px;
  background: #fff;
  color: #96a0af;
  font-size: 0.78rem;
  text-align: center;
}

.kc-roadmap-label {
  margin-bottom: 0.3rem;
  color: var(--muted);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.kc-roadmap-name {
  margin: 0 0 0.4rem;
  font-size: 1rem;
  font-weight: 600;
}

.kc-roadmap-tag {
  display: inline-block;
  margin-left: 0.4rem;
  padding: 0.1rem 0.45rem;
  border-radius: 999px;
  background: #eaf2fb;
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 700;
  vertical-align: middle;
}

.kc-roadmap-desc {
  color: var(--muted);
}

.kc-connector {
  padding-left: 0.5rem;
  color: var(--muted);
  font-size: 0.84rem;
}

.kc-benefits {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.9rem;
  margin-top: 1rem;
}

.kc-benefit {
  padding: 0.95rem 1rem;
  border: 1px solid var(--rule);
  border-radius: 10px;
  background: #fff;
}

.kc-benefit h4 {
  margin: 0 0 0.25rem;
  font-size: 0.95rem;
}

.kc-benefit p {
  color: var(--muted);
  font-size: 0.9rem;
}

.kc-faq {
  display: grid;
  gap: 0.9rem;
  margin-top: 1rem;
}

.kc-faq-item {
  padding: 1rem 1.1rem;
  border: 1px solid var(--rule);
  border-radius: 10px;
  background: #fafbfc;
}

.kc-faq-q {
  margin: 0 0 0.45rem;
  font-size: 0.98rem;
  font-weight: 600;
}

.kc-faq-a {
  color: var(--muted);
}

#kc-observation,
#kc-problem,
#kc-roadmap,
#kc-faq {
  scroll-margin-top: 88px;
}

/* ───────── Knowledge Context Poster (match poster_v8) ───────── */
#knowledge-context {
  padding-top: 2rem;
}

.kc-poster-shell {
  margin-top: 0.25rem;
  padding: 0;
  background: transparent;
  border-radius: 0;
}

.kc-poster {
  --bg: #ffffff;
  --surface: #f7f8fa;
  --surface-warm: #fbf9f7;
  --border: #e8e9ed;
  --border-light: #f0f1f4;
  --text-primary: #1a1d26;
  --text-secondary: #5a5f72;
  --text-dim: #9499a8;
  --text-hint: #b8bcc8;
  --accent-blue: #2b6cb0;
  --accent-blue-light: #ebf2fa;
  --accent-orange: #c4501c;
  --accent-orange-light: #fdf0ea;
  --accent-orange-mid: #f8ddd0;
  --accent-green: #276749;
  --accent-green-light: #edf7f1;
  --accent-teal: #1a7f7a;
  --accent-teal-light: #e9f7f6;
  width: 100%;
  max-width: 100%;
  margin: 0;
  padding: 16px 0 0;
  background: transparent;
  border-radius: 0;
  box-shadow: none;
  color: var(--text-primary);
  font-family: "Noto Sans SC", -apple-system, sans-serif;
}

.kc-poster .header {
  text-align: left;
  margin-bottom: 36px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--border);
}

.kc-poster .eyebrow {
  margin-bottom: 14px;
  color: var(--accent-blue);
  font-family: "JetBrains Mono", monospace;
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 3px;
  text-transform: uppercase;
}

.kc-poster h1 {
  margin: 0;
  color: var(--text-primary);
  font-family: "Noto Serif SC", serif;
  font-size: clamp(34px, 5vw, 42px);
  font-weight: 900;
  line-height: 1.45;
}

.kc-poster .hl {
  color: var(--accent-blue);
}

.kc-poster .core-thesis {
  display: inline-block;
  margin-top: 18px;
  padding: 12px 24px;
  background: var(--surface-warm);
  border: 1px solid #ede8e2;
  border-radius: 6px;
}

.kc-poster .ct-text {
  color: var(--accent-orange);
  font-family: "Noto Serif SC", serif;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.5;
}

.kc-poster .ct-sub {
  margin-top: 4px;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 300;
}

.kc-poster .section {
  padding: 0;
  margin-bottom: 40px;
  border: 0;
}

.kc-poster .section-head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.kc-poster .section-num {
  width: 22px;
  height: 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  border-radius: 50%;
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  font-weight: 500;
}

.kc-poster .section-num.blue {
  color: var(--accent-blue);
  background: var(--accent-blue-light);
}

.kc-poster .section-num.orange {
  color: var(--accent-orange);
  background: var(--accent-orange-light);
}

.kc-poster .section-num.teal {
  color: var(--accent-teal);
  background: var(--accent-teal-light);
}

.kc-poster .section-num.gray {
  color: var(--text-dim);
  background: var(--surface);
}

.kc-poster .section-title {
  margin: 0;
  color: var(--text-primary);
  font-family: "Noto Serif SC", serif;
  font-size: 22px;
  font-weight: 700;
}

.kc-poster .section-line {
  flex: 1;
  height: 1px;
  background: var(--border-light);
}

.kc-poster .section-desc {
  max-width: 800px;
  margin: 0 0 18px;
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.75;
}

.kc-poster .section-desc strong {
  color: var(--text-primary);
  font-weight: 600;
}

.kc-poster .obs-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.kc-poster .obs-card {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 10px;
}

.kc-poster .obs-card .card-zone {
  padding: 14px 16px;
}

.kc-poster .obs-card .card-zone-label {
  display: flex;
  align-items: center;
  gap: 5px;
  margin-bottom: 8px;
  font-family: "JetBrains Mono", monospace;
  font-size: 9px;
  font-weight: 500;
  letter-spacing: 1.5px;
  text-transform: uppercase;
}

.kc-poster .obs-card .card-zone-label::after {
  content: "";
  flex: 1;
  height: 1px;
}

.kc-poster .obs-card.c1 .card-zone.sem {
  border-left: 3px solid var(--accent-blue);
}

.kc-poster .obs-card.c2 .card-zone.sem {
  border-left: 3px solid var(--accent-orange);
}

.kc-poster .obs-card.c3 .card-zone.sem {
  border-left: 3px solid var(--accent-green);
}

.kc-poster .obs-card.c1 .card-zone.sem .card-zone-label {
  color: var(--accent-blue);
}

.kc-poster .obs-card.c1 .card-zone.sem .card-zone-label::after {
  background: var(--accent-blue-light);
}

.kc-poster .obs-card.c2 .card-zone.sem .card-zone-label {
  color: var(--accent-orange);
}

.kc-poster .obs-card.c2 .card-zone.sem .card-zone-label::after {
  background: var(--accent-orange-light);
}

.kc-poster .obs-card.c3 .card-zone.sem .card-zone-label {
  color: var(--accent-green);
}

.kc-poster .obs-card.c3 .card-zone.sem .card-zone-label::after {
  background: var(--accent-green-light);
}

.kc-poster .card-content {
  color: var(--text-primary);
  font-size: 15px;
  line-height: 1.65;
}

.kc-poster .card-zone.ctx {
  background: var(--surface);
  border-top: 1px solid var(--border-light);
}

.kc-poster .card-zone.ctx .card-zone-label {
  color: var(--text-dim);
}

.kc-poster .card-zone.ctx .card-zone-label::after {
  background: var(--border-light);
}

.kc-poster .ctx-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}

.kc-poster .ctx-tag {
  padding: 2.5px 8px;
  border-radius: 3px;
  font-size: 11.5px;
  font-weight: 500;
}

.kc-poster .ctx-tag .tl {
  margin-right: 3px;
  font-weight: 400;
}

.kc-poster .obs-card.c1 .ctx-tag {
  color: var(--accent-blue);
  background: var(--accent-blue-light);
}

.kc-poster .obs-card.c1 .ctx-tag .tl {
  color: rgba(43, 108, 176, 0.5);
}

.kc-poster .obs-card.c2 .ctx-tag {
  color: var(--accent-orange);
  background: var(--accent-orange-light);
}

.kc-poster .obs-card.c2 .ctx-tag .tl {
  color: rgba(196, 80, 28, 0.45);
}

.kc-poster .obs-card.c3 .ctx-tag {
  color: var(--accent-green);
  background: var(--accent-green-light);
}

.kc-poster .obs-card.c3 .ctx-tag .tl {
  color: rgba(39, 103, 73, 0.45);
}

.kc-poster .theory-callout {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  align-items: start;
  margin-top: 20px;
  padding: 16px 20px;
  background: var(--surface-warm);
  border: 1px solid #ede8e2;
  border-radius: 8px;
}

.kc-poster .tc-icon {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--accent-orange);
  background: #ede8e2;
  border-radius: 6px;
  font-family: "Noto Serif SC", serif;
  font-size: 16px;
  font-weight: 900;
}

.kc-poster .tc-text {
  color: var(--text-secondary);
  font-size: 14.5px;
  line-height: 1.75;
}

.kc-poster .tc-text strong {
  color: var(--text-primary);
  font-weight: 600;
}

.kc-poster .tc-ref {
  margin-top: 6px;
  color: var(--text-dim);
  font-size: 11.5px;
  font-style: italic;
}

.kc-poster .register-mapping {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin-top: 10px;
}

.kc-poster .reg-map-item {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-secondary);
  font-size: 11.5px;
}

.kc-poster .reg-map-arrow {
  color: var(--text-hint);
  font-size: 10px;
}

.kc-poster .reg-map-hl {
  color: var(--accent-blue);
  font-weight: 600;
}

.kc-poster .comparison {
  display: grid;
  grid-template-columns: 1fr 36px 1fr;
  align-items: stretch;
}

.kc-poster .comp-panel {
  padding: 22px 20px;
  border-radius: 10px;
}

.kc-poster .comp-panel.baseline {
  background: var(--surface);
  border: 1px solid var(--border);
}

.kc-poster .comp-panel.target {
  background: var(--accent-teal-light);
  border: 1px solid #c5e5e3;
}

.kc-poster .comp-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-hint);
}

.kc-poster .comp-badge {
  display: inline-block;
  margin-bottom: 10px;
  padding: 3px 8px;
  border-radius: 3px;
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 1.5px;
  text-transform: uppercase;
}

.kc-poster .baseline .comp-badge {
  color: var(--text-dim);
  background: #edeef2;
}

.kc-poster .target .comp-badge {
  color: var(--accent-teal);
  background: rgba(26, 127, 122, 0.12);
}

.kc-poster .comp-title {
  margin-bottom: 8px;
  font-family: "Noto Serif SC", serif;
  font-size: 17px;
  font-weight: 700;
}

.kc-poster .comp-desc {
  margin-bottom: 14px;
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.65;
}

.kc-poster .token-seq {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 5px;
  padding: 12px 14px;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(0, 0, 0, 0.04);
  border-radius: 6px;
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
}

.kc-poster .baseline .token-seq {
  background: var(--bg);
}

.kc-poster .tk {
  padding: 4px 8px;
  border-radius: 4px;
  font-weight: 500;
  white-space: nowrap;
}

.kc-poster .tk.plain {
  color: var(--text-secondary);
  background: #edeef2;
}

.kc-poster .tk.sep {
  padding: 4px 2px;
  color: var(--text-hint);
  font-size: 10px;
}

.kc-poster .tk.cb {
  color: var(--accent-blue);
  background: var(--accent-blue-light);
  border-left: 2.5px solid var(--accent-blue);
}

.kc-poster .tk.co {
  color: var(--accent-orange);
  background: var(--accent-orange-light);
  border-left: 2.5px solid var(--accent-orange);
}

.kc-poster .tk.cg {
  color: var(--accent-green);
  background: var(--accent-green-light);
  border-left: 2.5px solid var(--accent-green);
}

.kc-poster .comp-note {
  display: flex;
  align-items: flex-start;
  gap: 7px;
  margin-top: 12px;
  font-size: 11.5px;
  line-height: 1.5;
}

.kc-poster .baseline .comp-note {
  color: var(--text-dim);
}

.kc-poster .target .comp-note {
  color: var(--accent-teal);
}

.kc-poster .comp-note svg {
  flex-shrink: 0;
  margin-top: 1px;
}

.kc-poster .rm-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 20px;
  margin-bottom: 8px;
}

.kc-poster .rm-col-head {
  display: inline-block;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid;
  font-size: 14px;
  font-weight: 700;
}

.kc-poster .rm-col-head.model {
  color: var(--accent-blue);
  border-color: var(--accent-blue);
}

.kc-poster .rm-col-head.data {
  color: var(--accent-teal);
  border-color: var(--accent-teal);
}

.kc-poster .rm-item {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 16px;
  align-items: start;
  margin-bottom: 12px;
  padding: 18px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid;
  border-radius: 8px;
}

.kc-poster .rm-item.blue {
  border-left-color: var(--accent-blue);
}

.kc-poster .rm-item.teal {
  border-left-color: var(--accent-teal);
}

.kc-poster .rm-item.orange {
  border-left-color: var(--accent-orange);
}

.kc-poster .rm-img-placeholder {
  width: 140px;
  height: 140px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  flex-shrink: 0;
  padding: 8px;
  background: var(--border-light);
  border: 1.5px dashed var(--border);
  border-radius: 6px;
}

.kc-poster .rm-img-placeholder img {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
  display: block;
  border-radius: 4px;
}

.kc-poster .rm-label {
  margin-bottom: 4px;
  color: var(--text-dim);
  font-family: "JetBrains Mono", monospace;
  font-size: 9.5px;
  font-weight: 500;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.kc-poster .rm-name {
  margin-bottom: 6px;
  color: var(--text-primary);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.4;
}

.kc-poster .rm-tag {
  display: inline-block;
  margin-left: 4px;
  padding: 1.5px 6px;
  border-radius: 3px;
  font-family: "JetBrains Mono", monospace;
  font-size: 9.5px;
  font-weight: 500;
  vertical-align: middle;
}

.kc-poster .rm-tag.acl {
  color: var(--accent-blue);
  background: var(--accent-blue-light);
}

.kc-poster .rm-desc {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.65;
}

.kc-poster .rm-connector {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
  padding-left: 8px;
  color: var(--text-dim);
  font-size: 11px;
}

.kc-poster .rm-connector svg {
  flex-shrink: 0;
}

.kc-poster .benefits {
  display: flex;
  gap: 14px;
  margin-top: 16px;
}

.kc-poster .bf-card {
  flex: 1;
  padding: 14px 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.kc-poster .bf-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 6px;
  border-radius: 2px;
  vertical-align: middle;
}

.kc-poster .bf-dot.bl {
  background: var(--accent-blue);
}

.kc-poster .bf-dot.gr {
  background: var(--accent-green);
}

.kc-poster .bf-title {
  margin-bottom: 4px;
  font-size: 14px;
  font-weight: 700;
}

.kc-poster .bf-desc {
  color: var(--text-secondary);
  font-size: 13px;
  line-height: 1.6;
}

.kc-poster .faq-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.kc-poster .faq-item {
  padding: 20px 22px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.kc-poster .faq-q {
  display: flex;
  gap: 8px;
  margin-bottom: 10px;
  color: var(--text-primary);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.5;
}

.kc-poster .faq-q-tag {
  height: fit-content;
  margin-top: 2px;
  padding: 2px 7px;
  flex-shrink: 0;
  color: var(--accent-blue);
  background: var(--accent-blue-light);
  border-radius: 3px;
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  font-weight: 500;
}

.kc-poster .faq-a {
  padding-left: 36px;
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.75;
}

@media (max-width: 980px) {
  .hero {
    flex-direction: column;
    gap: 1.25rem;
  }

  .pub {
    flex-direction: column;
    gap: 0.85rem;
  }

  .pub-thumb {
    width: 100%;
    height: 220px;
    flex-basis: auto;
  }
}

/* Hide sidebar on narrower viewports where there is no space beside main */
@media (max-width: 1180px) {
  .page-sidebar {
    display: none;
  }
}

/* ───────── Footer ───────── */
footer {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1.5rem 3rem;
  color: var(--muted);
  font-size: 0.85rem;
  text-align: center;
  border-top: 1px solid var(--rule);
}

/* ───────── Responsive ───────── */
@media (max-width: 720px) {
  body {
    font-size: 16px;
  }

  main {
    padding: 1.5rem 1rem 3rem;
  }

  .hero {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 1.25rem;
  }

  .hero-avatar {
    width: 128px;
    height: 128px;
    flex-basis: 128px;
  }

  .hero-links {
    justify-content: center;
  }

  .pub {
    flex-direction: column;
    gap: 0.75rem;
  }

  .pub-thumb {
    width: 100%;
    height: 200px;
    flex-basis: auto;
  }

  .kc-observation-grid,
  .kc-comparison,
  .kc-benefits {
    grid-template-columns: 1fr;
  }

  .kc-roadmap-item {
    grid-template-columns: 1fr;
  }

  .kc-roadmap-figure {
    width: 100%;
    min-height: 88px;
  }

  .kc-poster-shell {
    padding: 0;
  }

  .kc-poster {
    padding: 8px 0 0;
  }

  .kc-poster .header {
    margin-bottom: 28px;
    padding-bottom: 24px;
  }

  .kc-poster .obs-cards {
    grid-template-columns: 1fr;
  }

  .kc-poster .comparison {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .kc-poster .comp-arrow {
    display: none;
  }

  .kc-poster .rm-columns {
    grid-template-columns: 1fr;
  }

  .kc-poster .rm-item {
    grid-template-columns: 100px 1fr;
  }

  .kc-poster .rm-img-placeholder {
    width: 100px;
    height: 100px;
  }

  .kc-poster h1 {
    font-size: 30px;
  }

  .kc-poster .benefits {
    flex-direction: column;
  }

  .nav-links {
    gap: 0.9rem;
  }

  .nav-inner {
    padding: 0.75rem 1rem;
  }
}

@media (max-width: 420px) {
  .hero-name {
    font-size: 1.8rem;
  }

  .hero-links {
    justify-content: center;
  }

  .pub-thumb {
    height: 180px;
  }

  .kc-poster .section-title {
    font-size: 19px;
  }

  .kc-poster .section-desc,
  .kc-poster .card-content,
  .kc-poster .comp-desc,
  .kc-poster .rm-desc,
  .kc-poster .faq-a {
    font-size: 13.5px;
  }

  .nav-links .nav-item {
    display: none;
  }
}

/* ───────── Print ───────── */
@media print {
  .nav,
  footer,
  .lang-toggle,
  .pub-links,
  .page-sidebar,
  .projects-sidebar {
    display: none !important;
  }
  body {
    color: #000;
  }
  a {
    color: #000;
    text-decoration: none;
  }
}