:root {
  color-scheme: light;
  --paper: #f7f7f4;
  --surface: #ffffff;
  --ink: #171a18;
  --muted: #626964;
  --line: #d8dcd6;
  --line-strong: #b7bdb7;
  --accent: #164f3b;
  --accent-soft: #e8efeb;
  --warm: #8b3e2f;
  --header: rgba(247, 247, 244, 0.94);
  --serif: "Source Serif 4", Georgia, serif;
  --sans: "DM Sans", Arial, sans-serif;
}

[data-theme="dark"] {
  color-scheme: dark;
  --paper: #111412;
  --surface: #171b18;
  --ink: #f0f2ed;
  --muted: #a6aea8;
  --line: #303630;
  --line-strong: #525b54;
  --accent: #87c9aa;
  --accent-soft: #1c2d25;
  --warm: #e4a092;
  --header: rgba(17, 20, 18, 0.94);
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  letter-spacing: 0;
  text-rendering: optimizeLegibility;
}

body.dialog-open { overflow: hidden; }

button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; }
a { color: inherit; }
img { display: block; max-width: 100%; }

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 12px;
  left: 12px;
  padding: 9px 14px;
  background: var(--ink);
  color: var(--paper);
  transform: translateY(-150%);
}
.skip-link:focus { transform: translateY(0); }

.shell {
  width: min(1180px, calc(100% - 48px));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  z-index: 100;
  top: 0;
  background: var(--header);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

.header-inner {
  display: grid;
  grid-template-columns: minmax(190px, 1fr) auto minmax(190px, 1fr);
  align-items: center;
  min-height: 62px;
  gap: 24px;
}

.wordmark {
  display: inline-flex;
  align-items: center;
  justify-self: start;
  gap: 11px;
  color: var(--ink);
  font-weight: 600;
  text-decoration: none;
}

.wordmark-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  background: var(--ink);
  color: var(--paper);
  border-radius: 50%;
  font-size: 11px;
}

.site-nav { display: flex; align-items: center; gap: 28px; }
.site-nav a,
.header-actions button {
  color: var(--muted);
  font-size: 13px;
  font-weight: 500;
  text-decoration: none;
}
.site-nav a { position: relative; padding-block: 20px; }
.site-nav a::after {
  position: absolute;
  right: 0;
  bottom: -1px;
  left: 0;
  height: 1px;
  background: var(--ink);
  content: "";
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 180ms ease;
}
.site-nav a:hover,
.site-nav a.active { color: var(--ink); }
.site-nav a.active::after { transform: scaleX(1); }

.header-actions {
  display: flex;
  align-items: center;
  justify-self: end;
  gap: 8px;
}

.icon-button {
  display: inline-grid;
  min-width: 40px;
  height: 40px;
  place-items: center;
  border: 0;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
}
.icon-button { border-radius: 50%; }
.icon-button:hover { background: var(--accent-soft); color: var(--accent); }
.menu-toggle { display: none; }

.hero { padding: 32px 0 36px; }
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.65fr);
  align-items: center;
  gap: clamp(44px, 7vw, 88px);
}

.eyebrow,
.section-index {
  margin: 0 0 18px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 760px;
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(44px, 5vw, 66px);
  font-weight: 500;
  line-height: .95;
  letter-spacing: 0;
}

.hero-role {
  margin: 16px 0 8px;
  font-family: var(--serif);
  font-size: clamp(21px, 2.2vw, 28px);
  line-height: 1.25;
}

.hero-intro {
  max-width: 720px;
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.58;
}
.hero-intro p { margin: 0 0 7px; }
.hero-intro p:last-child { margin-bottom: 0; }
.hero-intro a {
  color: var(--ink);
  font-weight: 500;
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
}
.hero-intro a:hover { color: var(--accent); border-bottom-color: var(--accent); }

.hero-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px 28px;
  margin-top: 18px;
}
.hero-links a,
.section-link {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--ink);
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
}
.hero-links a:not(.primary-link) { border-bottom: 1px solid var(--line-strong); }
.hero-links .primary-link {
  padding: 11px 15px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #fff;
  border-radius: 4px;
}
.hero-links a:hover,
.section-link:hover { color: var(--accent); }
.hero-links .primary-link:hover { background: transparent; }

.hero-metrics {
  display: flex;
  gap: 0;
  margin: 22px 0 0;
}
.hero-metrics > div {
  min-width: 130px;
  padding-right: 28px;
  border-right: 1px solid var(--line);
}
.hero-metrics > div + div { padding-left: 28px; }
.hero-metrics > div:last-child { border-right: 0; }
.hero-metrics dt {
  font-family: var(--serif);
  font-size: 30px;
  line-height: 1;
}
.hero-metrics dd {
  margin: 7px 0 0;
  color: var(--muted);
  font-size: 11px;
  text-transform: uppercase;
}

.portrait-block { width: min(100%, 270px); margin: 0 0 2px auto; }
.portrait-frame {
  aspect-ratio: 4 / 5;
  overflow: hidden;
  background: #e8ebe6;
}
.portrait-frame img { width: 100%; height: 100%; object-fit: cover; object-position: center top; }
.portrait-block figcaption {
  display: grid;
  gap: 2px;
  margin-top: 14px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.5;
}
.portrait-block figcaption a { width: fit-content; color: var(--ink); text-decoration: none; border-bottom: 1px solid var(--line-strong); }

.section-rule { padding: 60px 0; border-top: 1px solid var(--line); }
.split-section { display: grid; grid-template-columns: minmax(260px, .8fr) minmax(0, 1.2fr); gap: clamp(44px, 8vw, 110px); }
.section-heading h2,
.section-topline h2,
.contact h2 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(38px, 5vw, 62px);
  font-weight: 500;
  line-height: 1.05;
}
.prose-column { max-width: 710px; }
.prose-column > p { margin: 0 0 16px; font-family: var(--serif); font-size: 19px; line-height: 1.52; }
.research-topics {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}
.research-topics li {
  padding: 7px 11px;
  border: 1px solid var(--line);
  border-radius: 4px;
  color: var(--muted);
  font-size: 12px;
}

.section-topline {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 32px;
  margin-bottom: 38px;
}
.section-topline .section-index { margin-bottom: 16px; }
.section-link { padding-bottom: 4px; border-bottom: 1px solid var(--line-strong); }

.publication-list { border-top: 1px solid var(--line-strong); }
.year-group { display: grid; grid-template-columns: 110px 1fr; border-bottom: 1px solid var(--line); }
.year-label {
  margin: 0;
  padding: 26px 20px 26px 0;
  font-family: var(--serif);
  font-size: 24px;
  font-weight: 500;
}
.year-items { border-left: 1px solid var(--line); }
.publication-item { position: relative; padding: 22px 0 22px 30px; }
.publication-item + .publication-item { border-top: 1px solid var(--line); }
.publication-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 30px; align-items: start; }
.publication-kicker { margin: 0 0 7px; color: var(--accent); font-size: 11px; font-weight: 600; text-transform: uppercase; }
.publication-title { max-width: 820px; margin: 0; font-family: var(--serif); font-size: 22px; font-weight: 600; line-height: 1.35; }
.publication-authors { margin: 10px 0 0; color: var(--muted); font-size: 13px; }
.publication-authors strong { color: var(--ink); font-weight: 600; }
.publication-meta { display: flex; flex-wrap: wrap; gap: 7px 14px; margin: 8px 0 0; color: var(--muted); font-size: 12px; }
.publication-venue { color: var(--ink); font-style: italic; }
.publication-badge { color: var(--warm); font-weight: 600; }
.publication-actions { display: flex; flex-wrap: wrap; justify-content: end; gap: 7px; min-width: 165px; }
.publication-actions a,
.publication-actions button {
  display: inline-flex;
  height: 32px;
  align-items: center;
  gap: 6px;
  padding: 0 9px;
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 600;
  text-decoration: none;
}
.publication-actions a:hover,
.publication-actions button:hover { border-color: var(--accent); color: var(--accent); }

.journal-list { border-top: 1px solid var(--line-strong); }
.journal-list p { margin: 0; padding: 12px 0; border-bottom: 1px solid var(--line); font-family: var(--serif); font-size: 17px; }

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  grid-auto-rows: 92px;
  gap: 14px;
}
.gallery-item {
  position: relative;
  grid-column: span 4;
  grid-row: span 3;
  overflow: hidden;
  border: 0;
  background: var(--surface);
  cursor: zoom-in;
}
.gallery-item:nth-child(1),
.gallery-item:nth-child(4) { grid-column: span 8; grid-row: span 4; }
.gallery-item:nth-child(2),
.gallery-item:nth-child(3) { grid-row: span 2; }
.gallery-item img { width: 100%; height: 100%; object-fit: cover; transition: transform 350ms ease; }
.gallery-item:hover img { transform: scale(1.02); }
.gallery-item span {
  position: absolute;
  right: 12px;
  bottom: 12px;
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 50%;
  background: rgba(255,255,255,.9);
  color: #171a18;
}

.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(44px, 8vw, 110px); }
.contact h2 { max-width: 500px; }
.contact-details { align-self: end; }
.contact-email { display: inline-block; margin-bottom: 22px; font-family: var(--serif); font-size: clamp(24px, 3vw, 38px); line-height: 1.2; text-decoration-thickness: 1px; text-underline-offset: 7px; overflow-wrap: anywhere; }
.contact-details > p { max-width: 480px; margin: 0; color: var(--muted); }
.contact-links { display: flex; flex-wrap: wrap; gap: 24px; margin-top: 32px; }
.contact-links a,
.contact-links button { padding: 0 0 3px; border: 0; border-bottom: 1px solid var(--line-strong); background: transparent; color: var(--ink); cursor: pointer; font-size: 13px; font-weight: 600; text-decoration: none; }

.site-footer { padding: 28px 0; border-top: 1px solid var(--line); }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.footer-inner p { margin: 0; color: var(--muted); font-size: 12px; }
.footer-inner a { display: inline-flex; align-items: center; gap: 8px; font-size: 12px; font-weight: 600; text-decoration: none; }

dialog {
  width: min(1080px, calc(100% - 32px));
  max-height: calc(100vh - 40px);
  padding: 0;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--surface);
  color: var(--ink);
}
dialog::backdrop { background: rgba(10, 14, 11, .78); }
.dialog-close { position: sticky; z-index: 2; top: 12px; float: right; margin: 12px 12px -52px 0; background: var(--surface); border: 1px solid var(--line); }
.media-dialog figure { margin: 0; padding: 64px 24px 24px; }
.media-dialog figure img { width: 100%; max-height: calc(100vh - 150px); object-fit: contain; }
.media-dialog figcaption { margin-top: 14px; color: var(--muted); font-size: 12px; }
.wechat-dialog { width: min(430px, calc(100% - 32px)); padding: 36px; text-align: center; }
.wechat-dialog .section-index { margin-bottom: 8px; }
.wechat-dialog h2 { margin: 0 0 22px; font-family: var(--serif); font-weight: 500; }
.wechat-dialog img { width: 100%; height: auto; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

@media (max-width: 900px) {
  .header-inner { grid-template-columns: 1fr auto auto; }
  .menu-toggle { display: inline-grid; grid-column: 2; }
  .header-actions { grid-column: 3; }
  .site-nav {
    position: absolute;
    top: 62px;
    right: 0;
    left: 0;
    display: none;
    align-items: stretch;
    gap: 0;
    padding: 10px 24px 22px;
    border-bottom: 1px solid var(--line);
    background: var(--paper);
  }
  .site-nav.open { display: grid; }
  .site-nav a { padding: 11px 0; }
  .site-nav a::after { display: none; }
  .hero { padding: 30px 0 36px; }
  .hero-grid { grid-template-columns: minmax(0, 1.2fr) minmax(230px, .8fr); gap: 36px; }
  .hero h1 { font-size: clamp(52px, 7vw, 68px); }
  .split-section { gap: 40px; }
  .publication-row { grid-template-columns: 1fr; gap: 18px; }
  .publication-actions { justify-content: start; }
  .gallery-grid { grid-auto-rows: 74px; }
}

@media (max-width: 680px) {
  .shell { width: min(100% - 32px, 1180px); }
  .wordmark-name { display: none; }
  .header-inner { grid-template-columns: 1fr auto auto; gap: 4px; }
  .hero { padding: 28px 0 36px; }
  .hero-grid { grid-template-columns: 1fr; gap: 28px; }
  .hero h1 { font-size: 50px; }
  .hero-intro { font-size: 14px; }
  .portrait-block { width: 70%; margin: 0; }
  .hero-metrics { width: 100%; }
  .hero-metrics { margin-top: 22px; }
  .hero-metrics > div { min-width: 0; flex: 1; padding-right: 16px; }
  .hero-metrics > div + div { padding-left: 16px; }
  .hero-metrics dt { font-size: 25px; }
  .section-rule { padding: 50px 0; }
  .split-section,
  .contact-grid { grid-template-columns: 1fr; gap: 42px; }
  .section-topline { align-items: start; margin-bottom: 28px; }
  .section-link { display: none; }
  .year-group { grid-template-columns: 1fr; }
  .year-label { padding: 20px 0 10px; }
  .year-items { border-left: 0; }
  .publication-item { padding: 22px 0; }
  .publication-title { font-size: 19px; }
  .gallery-grid { grid-template-columns: 1fr 1fr; grid-auto-rows: 145px; gap: 8px; }
  .gallery-item,
  .gallery-item:nth-child(1),
  .gallery-item:nth-child(2),
  .gallery-item:nth-child(3),
  .gallery-item:nth-child(4) { grid-column: span 1; grid-row: span 1; }
  .gallery-item:first-child { grid-column: span 2; grid-row: span 2; }
  .contact-email { font-size: 24px; }
}

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