:root {
  --ink: #10233d;
  --text: #33455f;
  --muted: #5f6f84;
  --paper: #f4f7fb;
  --panel: #ffffff;
  --surface: #ffffff;
  --surface-soft: #f7f9fc;
  --line: #d8e0ea;
  --line-strong: #c5d0dd;
  --accent: #315f93;
  --accent-dark: #1e3f68;
  --accent-soft: #eaf1f8;
  --grade-b: #7a5715;
  --sidebar-width: 240px;
  --content-width: 980px;
  --shell-gap: 20px;
  --radius-card: 16px;
  --shadow-card: 0 10px 30px rgba(31, 55, 82, .07);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 17px; }
html[lang="zh-CN"] { font-size: 17.25px; }
body {
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, var(--content-width));
  column-gap: var(--shell-gap);
  align-items: start;
  justify-content: center;
  min-height: 100vh;
  margin: 0;
  padding: 82px clamp(18px, 3vw, 40px) 0;
  color: var(--ink);
  background: linear-gradient(180deg, #eef3fa 0, var(--paper) 340px);
  font-family: "Atkinson Hyperlegible", "Noto Sans SC", sans-serif;
  font-size: 1rem;
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
html[lang="zh-CN"] body { font-family: "Noto Sans SC", "Atkinson Hyperlegible", sans-serif; }
a { color: inherit; text-decoration: none; }
a, button { touch-action: manipulation; }
a[href] { cursor: pointer; }
a:focus-visible { outline: 3px solid rgba(49, 95, 147, .3); outline-offset: 3px; border-radius: 6px; }
.skip-link {
  position: fixed;
  top: 8px;
  left: 12px;
  z-index: 100;
  padding: 9px 12px;
  color: #fff;
  background: var(--accent-dark);
  border-radius: 8px;
  font-size: .85rem;
  font-weight: 700;
  transform: translateY(-150%);
  transition: transform .18s ease;
}
.skip-link:focus { transform: translateY(0); }

.topbar {
  position: fixed;
  inset: 0 0 auto;
  z-index: 40;
  height: 62px;
  background: rgba(255, 255, 255, .94);
  border-bottom: 1px solid rgba(197, 208, 221, .8);
  box-shadow: 0 3px 14px rgba(31, 55, 82, .04);
  backdrop-filter: blur(14px);
}
.topbar-inner {
  width: calc(100% - 36px);
  max-width: calc(var(--sidebar-width) + var(--shell-gap) + var(--content-width));
  height: 100%;
  margin: 0 auto;
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, var(--content-width));
  column-gap: var(--shell-gap);
  align-items: center;
}
.topbar-home { min-height: 44px; display: inline-flex; align-items: center; color: var(--ink); font-size: .95rem; font-weight: 700; letter-spacing: -.015em; }
.topbar-nav {
  grid-column: 2;
  grid-row: 1;
  display: flex;
  align-items: center;
  gap: clamp(18px, 2vw, 28px);
  min-width: 0;
  padding-right: 112px;
  color: #4f6076;
  font-size: .9rem;
  font-weight: 700;
}
.topbar-nav a { position: relative; min-height: 44px; display: inline-flex; align-items: center; white-space: nowrap; transition: color .2s ease; }
.topbar-nav a::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -8px;
  left: 0;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform .2s ease;
}
.topbar-nav a:hover { color: var(--accent-dark); }
.topbar-nav a:hover::after { transform: scaleX(1); }
.topbar-lang {
  grid-column: 2;
  grid-row: 1;
  justify-self: end;
  display: flex;
  align-items: center;
  font-size: .82rem;
  font-weight: 700;
}
.topbar-lang a { color: var(--accent); }
.topbar-lang a { min-height: 44px; display: inline-flex; align-items: center; }
.topbar-lang [aria-current="page"] { color: var(--ink); }
.lang-divider { margin: 0 8px; color: #a8b3c2; font-weight: 400; }

.site-header {
  position: sticky;
  grid-column: 1;
  grid-row: 1 / span 2;
  align-self: start;
  top: 82px;
  z-index: 20;
  width: 100%;
  overflow: hidden;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
}
.header-inner {
  width: 100%;
  min-height: 100%;
  padding: 18px 18px 16px;
  display: flex;
  flex-direction: column;
  align-items: stretch;
}
.sidebar-profile { text-align: center; }
.profile-photo {
  width: 146px;
  aspect-ratio: 4 / 5;
  margin: 0 auto 13px;
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: 0 8px 22px rgba(31, 55, 82, .1);
}
.profile-photo img { display: block; width: 100%; height: 100%; object-fit: cover; object-position: center top; }
.sidebar-profile h2 { margin: 0; font-size: 1.46rem; line-height: 1.15; letter-spacing: -.025em; }
.sidebar-native-name { margin: 4px 0 0; color: var(--muted); font-size: .9rem; }
.sidebar-role { margin: 9px 0 0; color: var(--accent-dark); font-size: .9rem; line-height: 1.42; font-weight: 700; }
.sidebar-position { margin: 3px 0 0; color: var(--muted); font-size: .82rem; font-weight: 700; }
.sidebar-affiliation { margin: 13px 0 0; color: var(--text); font-size: .84rem; line-height: 1.5; }
.sidebar-location { margin: 5px 0 0; color: var(--muted); font-size: .8rem; }
.sidebar-links {
  margin-top: 24px;
  padding-top: 10px;
  display: flex;
  flex-direction: column;
  gap: 3px;
  border-top: 1px solid var(--line);
  color: #44566f;
  font-size: .86rem;
  font-weight: 700;
}
.sidebar-links a {
  min-height: 40px;
  padding: 8px 9px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-radius: 8px;
  transition: color .2s ease, background-color .2s ease;
}
.sidebar-links a:hover { color: var(--accent-dark); background: var(--accent-soft); }

main { grid-column: 2; grid-row: 1; align-self: start; min-width: 0; }
main > section { width: 100%; }
.hero {
  margin: 0 0 4px;
  padding: 28px 30px 26px;
  background: linear-gradient(145deg, #f8fbff, #f1f5fa);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
}
.hero-copy { display: flex; min-height: 100%; flex-direction: column; }
.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  padding: 0;
  color: var(--accent-dark);
  background: none;
  border: 0;
  border-radius: 0;
  font: 700 .76rem "DM Mono", monospace;
  letter-spacing: .07em;
  text-transform: uppercase;
}
.eyebrow::before { content: ""; flex: 0 0 24px; height: 2px; background: var(--accent); }
.hero h1 {
  max-width: 880px;
  margin: 14px 0 7px;
  color: #142b4c;
  font-size: clamp(2.5rem, 4vw, 3.2rem);
  line-height: 1.04;
  letter-spacing: -.045em;
  text-wrap: balance;
}
.hero-subtitle {
  max-width: 850px;
  margin: 0 0 15px;
  color: var(--accent);
  font-size: 1.08rem;
  line-height: 1.5;
  font-weight: 700;
  text-wrap: balance;
}
.intro {
  max-width: 100%;
  margin: 8px 0 0;
  color: var(--text);
  font-size: 1rem;
  line-height: 1.7;
  text-wrap: pretty;
}
.intro strong { color: var(--ink); }
.secondary-intro { margin-top: 6px; }
.hero-tags { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 18px; padding-top: 0; }
.hero-tags span {
  padding: 6px 10px;
  color: var(--accent-dark);
  background: rgba(255, 255, 255, .72);
  border: 1px solid #cad7e6;
  border-radius: 999px;
  font: 700 .74rem "DM Mono", monospace;
}
html[lang="zh-CN"] .hero h1 { letter-spacing: -.035em; }
html[lang="zh-CN"] .hero-subtitle { line-height: 1.62; }
html[lang="zh-CN"] .intro { font-size: 1.02rem; line-height: 1.82; letter-spacing: .006em; }

.section { padding: 25px 0; scroll-margin-top: 74px; }
.section-heading { margin-bottom: 14px; padding-bottom: 10px; border-bottom: 1px solid var(--line); }
.section-label {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  color: var(--ink);
  font-size: 1.48rem;
  line-height: 1.2;
  font-weight: 700;
  letter-spacing: -.025em;
}
.section-label::before {
  width: 1.45rem;
  flex: 0 0 1.45rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: "Apple Color Emoji", "Segoe UI Emoji", "Noto Color Emoji", sans-serif;
  font-size: 1.32rem;
  line-height: 1;
}
.section-summary { margin: 5px 0 0 32px; color: var(--muted); font-size: .88rem; line-height: 1.5; }
.publication-note { margin: 3px 0 0 32px; color: var(--muted); font-size: .78rem; line-height: 1.45; }

.news-section { padding-bottom: 20px; }
.news-section .section-label::before { content: "🔥"; }
.highlights .section-label::before { content: "🔬"; }
.timeline-section .section-label::before { content: "🧭"; }
.publications .section-label::before { content: "📚"; }
.news-list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 5px 20px;
  list-style: none;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  box-shadow: 0 6px 18px rgba(31, 55, 82, .04);
}
.news-list li {
  position: relative;
  display: grid;
  grid-template-columns: 142px 28px minmax(0, 1fr);
  gap: 12px;
  align-items: center;
  padding: 9px 0;
  color: var(--text);
  border-bottom: 1px solid #e7ecf2;
  font-size: .94rem;
  line-height: 1.55;
}
.news-list li:last-child { border-bottom: 0; }
.news-list li::before { content: none; }
.news-list time { color: var(--accent-dark); font: 700 .8rem "DM Mono", monospace; white-space: nowrap; }
.news-icon {
  width: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: "Apple Color Emoji", "Segoe UI Emoji", "Noto Color Emoji", sans-serif;
  font-size: 1.16rem;
  line-height: 1;
}
.news-list strong { color: var(--ink); font-weight: 700; }
.news-list a {
  color: var(--accent-dark);
  text-decoration: underline;
  text-decoration-color: rgba(30, 63, 104, .4);
  text-underline-offset: 3px;
  transition: color .2s ease, text-decoration-color .2s ease;
}
.news-list a:hover { color: var(--accent); text-decoration-color: currentColor; }
.news-list a strong { color: inherit; }

.research-copy { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; counter-reset: research; }
.research-card {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  grid-template-rows: auto auto;
  align-content: center;
  gap: 5px 14px;
  min-width: 0;
  padding: 17px 18px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: 0 6px 18px rgba(31, 55, 82, .04);
  counter-increment: research;
  transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
}
.research-icon {
  grid-column: 1;
  grid-row: 1 / span 2;
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  color: #fff;
  background: var(--accent-dark);
  border-radius: 10px;
  font-size: 0;
  align-self: center;
}
.research-icon::after {
  content: "0" counter(research);
  display: block;
  font: 500 .74rem/1 "DM Mono", monospace;
  letter-spacing: 0;
  transform: translateY(-7px);
}
.research-card h3 { grid-column: 2; grid-row: 1; margin: 0; color: var(--ink); font-size: 1.04rem; line-height: 1.35; }
.research-card p { grid-column: 2; grid-row: 2; margin: 0; color: var(--muted); font-size: .9rem; line-height: 1.62; }

.timeline { display: grid; gap: 9px; }
.timeline article {
  display: grid;
  grid-template-columns: minmax(0, 1fr) max-content;
  gap: 6px 20px;
  padding: 16px 19px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 13px;
  box-shadow: 0 5px 16px rgba(31, 55, 82, .035);
  transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
}
.timeline article > div { grid-column: 1; grid-row: 1; min-width: 0; }
.timeline time { grid-column: 2; grid-row: 1; color: var(--accent-dark); font: 700 .78rem "DM Mono", monospace; white-space: nowrap; }
.timeline h3 { margin: 0 0 2px; font-size: 1.06rem; }
.timeline p { margin: 0; color: var(--muted); font-size: .92rem; line-height: 1.5; }

.publication-list { min-width: 0; }
.pub-year-group + .pub-year-group { margin-top: 26px; }
.pub-year-heading {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 11px;
  color: var(--accent-dark);
  font: 700 .88rem "DM Mono", monospace;
  letter-spacing: .12em;
}
.pub-year-heading::after { content: ""; width: 58px; height: 1px; background: var(--line-strong); }
.pub-card-list { display: grid; gap: 11px; }
.publication {
  display: grid;
  grid-template-columns: minmax(210px, 31%) minmax(0, 1fr);
  gap: 16px;
  padding: 15px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: 0 7px 20px rgba(31, 55, 82, .05);
  transition: transform .22s ease, border-color .22s ease, box-shadow .22s ease;
}
.publication-figure {
  position: relative;
  min-height: 156px;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background: var(--surface-soft);
  border: 1px solid var(--line);
  border-radius: 9px;
}
.publication-figure img { position: absolute; inset: 0; z-index: 2; width: 100%; height: 100%; object-fit: cover; transition: transform .25s ease; }
.publication-figure.has-image .figure-placeholder { display: none; }
.figure-placeholder { position: absolute; inset: 0; display: grid; place-content: center; gap: 6px; padding: 16px; color: var(--muted); text-align: center; }
.figure-placeholder span { font-size: .82rem; font-weight: 700; }
.figure-placeholder code { color: #7f8da1; font: .66rem/1.4 "DM Mono", monospace; word-break: break-all; }
.publication-content { min-width: 0; align-self: center; }
.publication-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 7px; margin-bottom: 7px; }
.publication-venue,
.venue {
  padding: 4px 8px;
  color: var(--accent-dark);
  background: var(--accent-soft);
  border-radius: 6px;
  font: 700 .72rem "DM Mono", monospace;
  letter-spacing: .035em;
  text-transform: uppercase;
}
.publication h3 { margin: 0; font-size: 1.04rem; line-height: 1.42; letter-spacing: -.008em; font-weight: 700; }
.publication-title { grid-column: 1 / -1; display: grid; grid-template-columns: auto minmax(0, 1fr) auto; gap: 9px; align-items: start; }
.grade { display: inline-flex; min-width: 48px; padding: 3px 7px; justify-content: center; border-radius: 5px; font: 700 .65rem "DM Mono", monospace; white-space: nowrap; }
.grade-a { color: #236344; background: #edf7f1; border: 1px solid #bcdcca; }
.grade-b { color: var(--grade-b); background: #fff8e9; border: 1px solid #ead8a8; }
.venue-full { grid-column: 1 / -1; margin: 6px 0 0; color: #586b82; font-size: .84rem; line-height: 1.48; }
.venue-full span { margin-right: 7px; color: var(--accent-dark); font: 700 .68rem "DM Mono", monospace; text-transform: uppercase; }
.publication .authors { grid-column: 1 / -1; margin: 7px 0 0; color: var(--muted); font-size: .86rem; line-height: 1.55; }
.publication .authors strong { color: var(--ink); font-weight: 700; }
.pub-actions { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 10px; }
.pub-link {
  min-height: 44px;
  padding: 7px 10px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--accent-dark);
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  font-size: .8rem;
  line-height: 1.2;
  font-weight: 700;
  transition: color .2s ease, background-color .2s ease, border-color .2s ease;
}
.pub-link:hover { color: #fff; background: var(--accent); border-color: var(--accent); }

@media (hover: hover) and (pointer: fine) {
  .research-card:hover,
  .timeline article:hover,
  .publication:hover,
  .publication:focus-within {
    transform: translateY(-2px);
    border-color: #b8c8d9;
    box-shadow: 0 10px 24px rgba(31, 55, 82, .08);
  }
  .publication:hover .publication-figure img,
  .publication:focus-within .publication-figure img { transform: scale(1.02); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
}

footer {
  grid-column: 2;
  grid-row: 2;
  margin: 4px 0 0;
  padding: 20px 0 26px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 5px 16px;
  color: var(--muted);
  border-top: 1px solid var(--line);
}
footer p { margin: 0; color: var(--ink); font-size: .92rem; }
.contact-note { color: var(--accent); font-size: .82rem; font-weight: 700; }
footer > span:last-child { grid-column: 1 / -1; font: .72rem "DM Mono", monospace; }

@media (max-width: 1180px) {
  :root { --sidebar-width: 220px; --content-width: min(900px, calc(100vw - 286px)); }
}

@media (max-width: 900px) {
  html, html[lang="zh-CN"] { font-size: 16px; }
  body { display: block; min-height: 0; padding: 62px 0 0; }
  .topbar { height: 62px; }
  .topbar-inner { width: 100%; max-width: none; padding: 0 20px; display: flex; gap: 18px; }
  .topbar-home { flex: 0 0 auto; }
  .topbar-nav { flex: 1 1 auto; grid-column: auto; grid-row: auto; gap: 18px; padding-right: 0; overflow-x: auto; scrollbar-width: none; }
  .topbar-nav::-webkit-scrollbar { display: none; }
  .topbar-lang { flex: 0 0 auto; grid-column: auto; grid-row: auto; justify-self: auto; }
  .site-header { position: static; width: 100%; height: auto; min-height: 0; max-height: none; overflow: visible; border: 0; border-bottom: 1px solid var(--line); border-radius: 0; box-shadow: none; }
  .header-inner { min-height: 0; padding: 16px 24px; display: grid; grid-template-columns: 96px minmax(0, 1fr); gap: 12px 18px; }
  .sidebar-profile { grid-column: 1 / -1; display: grid; grid-template-columns: 96px minmax(0, 1fr); grid-template-rows: repeat(6, auto); column-gap: 18px; text-align: left; align-items: start; }
  .profile-photo { grid-column: 1; grid-row: 1 / 7; width: 96px; margin: 0; border-radius: 12px; }
  .sidebar-profile h2 { grid-column: 2; margin-top: 1px; font-size: 1.28rem; }
  .sidebar-native-name, .sidebar-role, .sidebar-position, .sidebar-affiliation, .sidebar-location { grid-column: 2; }
  .sidebar-native-name { margin-top: 2px; font-size: .82rem; }
  .sidebar-role { margin-top: 5px; font-size: .85rem; }
  .sidebar-position { margin-top: 2px; font-size: .78rem; }
  .sidebar-affiliation { margin-top: 6px; font-size: .8rem; }
  .sidebar-location { margin-top: 2px; font-size: .76rem; }
  .sidebar-links { grid-column: 1 / -1; margin-top: 0; padding-top: 10px; flex-direction: row; flex-wrap: wrap; gap: 8px; font-size: .8rem; }
  .sidebar-links a { min-height: 44px; padding: 7px 10px; background: var(--surface-soft); border: 1px solid var(--line); gap: 10px; }
  main { padding: 0 22px; }
  .hero { height: auto; min-height: 0; max-height: none; margin-top: 20px; padding: 24px; }
  .hero-tags { margin-top: 18px; padding-top: 0; }
  .section { padding: 22px 0; }
  footer { margin: 0 22px; padding: 20px 0 24px; }
}

@media (max-width: 720px) {
  .topbar-inner { gap: 14px; padding: 0 16px; }
  .topbar-home { display: none; }
  .topbar-nav { gap: 14px; font-size: .8rem; }
  .topbar-lang { font-size: .76rem; }
  main { padding: 0 16px; }
  .hero { margin-top: 16px; padding: 21px 19px; }
  .eyebrow { font-size: .68rem; }
  .hero h1 { font-size: 2.25rem; }
  .hero-subtitle { font-size: 1rem; }
  .intro, html[lang="zh-CN"] .intro { font-size: 1rem; line-height: 1.72; }
  .section-label { font-size: 1.34rem; }
  .section-summary, .publication-note { margin-left: 0; }
  .research-copy { grid-template-columns: 1fr; }
  .news-list { padding: 4px 16px; }
  .news-list li { grid-template-columns: 126px 28px minmax(0, 1fr); gap: 10px; font-size: .9rem; }
  .publication { grid-template-columns: 1fr; gap: 13px; }
  .publication-figure { min-height: 0; }
  .publication h3 { font-size: 1rem; }
  footer { margin: 0 16px; grid-template-columns: 1fr; }
  .contact-note, footer > span:last-child { grid-column: 1; }
}

@media (max-width: 520px) {
  .topbar-nav { gap: 11px; font-size: .74rem; }
  .topbar-lang { font-size: .72rem; }
  .header-inner { grid-template-columns: 78px minmax(0, 1fr); padding: 14px 16px; }
  .sidebar-profile { grid-template-columns: 78px minmax(0, 1fr); column-gap: 14px; }
  .profile-photo { width: 78px; border-radius: 10px; }
  .sidebar-profile h2 { font-size: 1.18rem; }
  .sidebar-role { font-size: .8rem; }
  .sidebar-affiliation { font-size: .75rem; }
  .sidebar-location { font-size: .72rem; }
  .sidebar-links { gap: 6px; }
  .sidebar-links a { min-height: 44px; padding: 6px 8px; }
  .hero h1 { font-size: 2rem; }
  .news-list li { grid-template-columns: 28px minmax(0, 1fr); gap: 2px 10px; }
  .news-list time { grid-column: 2; grid-row: 1; font-size: .76rem; }
  .news-icon { grid-column: 1; grid-row: 1 / span 2; }
  .news-list li > span:last-child { grid-column: 2; grid-row: 2; }
  .timeline article { grid-template-columns: 1fr; gap: 5px; padding: 15px 16px; }
  .timeline time { grid-column: 1; grid-row: 1; }
  .timeline article > div { grid-column: 1; grid-row: 2; }
  .publication-title { grid-template-columns: auto minmax(0, 1fr); }
  .publication-title .grade { grid-column: 2; justify-self: start; }
}