/* Yuanpeng He — an editorial academic homepage. */
:root {
  --paper: #f8f7f4;
  --surface: #fff;
  --ink: #242925;
  --muted: #626660;
  --line: #dcded6;
  --accent: #8b2838;
  --accent-soft: #f1e7e7;
  --serif: Georgia, "Times New Roman", "Songti SC", "STSong", serif;
  --sans:
    -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --width: 1120px;
}

* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  scroll-padding-top: 105px;
}
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 18px/1.65 var(--sans);
  -webkit-font-smoothing: antialiased;
}
button,
input {
  font: inherit;
}
button,
a,
input,
summary {
  -webkit-tap-highlight-color: transparent;
}
button {
  cursor: pointer;
}
a {
  color: inherit;
  text-decoration: none;
}
a:hover {
  color: var(--accent);
}
button:focus-visible,
a:focus-visible,
summary:focus-visible,
input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 5px;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
h1,
h2,
h3,
h4,
p,
figure,
blockquote {
  margin: 0;
}
h1,
h2,
h3,
h4 {
  text-wrap: balance;
}
p {
  overflow-wrap: break-word;
}
strong {
  font-weight: 600;
}
::selection {
  background: #ead3d7;
  color: #54202a;
}
[hidden] {
  display: none !important;
}
html[data-language="en"] .lang-zh,
html[data-language="zh"] .lang-en {
  display: none !important;
}
.wrap {
  width: min(var(--width), calc(100% - 96px));
  margin-inline: auto;
}
.sr-only {
  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;
  top: -100px;
  left: 20px;
  z-index: 100;
  padding: 10px 18px;
  background: var(--ink);
  color: #fff;
}
.skip-link:focus {
  top: 10px;
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  height: 82px;
  width: min(var(--width), calc(100% - 96px));
  margin: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}
.wordmark {
  font-family: var(--serif);
  font-size: 33px;
  font-weight: 700;
  letter-spacing: -2px;
}
.wordmark span {
  color: var(--accent);
}
.desktop-nav {
  display: flex;
  gap: 30px;
  margin-left: auto;
}
.desktop-nav a {
  font-size: 14.5px;
  font-weight: 500;
  padding: 10px 0;
  position: relative;
  color: var(--muted);
}
.desktop-nav a:hover,
.desktop-nav a[aria-current] {
  color: var(--accent);
}
.desktop-nav a[aria-current]::after {
  content: "";
  height: 2px;
  background: var(--accent);
  position: absolute;
  bottom: 2px;
  left: 0;
  right: 0;
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}
.language-button {
  padding: 7px 13px;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 4px;
  font-size: 13.5px;
  min-width: 48px;
  min-height: 40px;
  color: var(--ink);
}
.language-button:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.menu-button {
  display: none;
  background: none;
  border: 0;
  padding: 8px 0 8px 12px;
  color: var(--ink);
  gap: 12px;
  align-items: center;
}
.mobile-nav {
  padding: 12px 24px 22px;
  border-top: 1px solid var(--line);
}
.mobile-nav a {
  display: block;
  padding: 10px;
  font-size: 17px;
}
.hero {
  padding-top: 88px;
  padding-bottom: 70px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 278px;
  gap: 90px;
  align-items: center;
}
.eyebrow {
  font-size: 12.5px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
}
.accent-rule {
  width: 26px;
  height: 2px;
  background: var(--accent);
  flex: none;
}
.hero h1 {
  font-family: var(--serif);
  font-size: clamp(55px, 5.94vw, 85px);
  font-weight: 400;
  line-height: 1.13;
  letter-spacing: -3.8px;
  margin-top: 25px;
  white-space: nowrap;
}
.name-dot {
  color: var(--accent);
}
html[data-language="zh"] .hero h1 {
  letter-spacing: 0.05em;
  font-size: 81px;
}
.name-secondary {
  font-size: 19px;
  margin-top: 12px;
  color: var(--muted);
}
.name-divider {
  color: #aeb0a8;
  padding: 0 14px;
}
.hero-bio {
  max-width: 665px;
  margin-top: 28px;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.85;
}
.hero-bio p + p {
  margin-top: 14px;
}
.hero-bio p:first-child,
.hero-bio p.lang-zh:nth-child(2) {
  font-size: 20px;
  line-height: 1.7;
  color: var(--ink);
}
html[data-language="zh"] .hero-bio p.lang-zh {
  margin-top: 0;
}
html[data-language="zh"] .hero-bio p.lang-zh + p.lang-en + p.lang-zh {
  margin-top: 14px;
}
.hero-bio strong {
  color: var(--ink);
}
.hero-links {
  display: flex;
  align-items: center;
  gap: 25px;
  flex-wrap: wrap;
  margin-top: 28px;
}
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
  padding: 12px 20px;
  min-height: 46px;
  border-radius: 4px;
  font-size: 14.5px;
  font-weight: 500;
  line-height: 1.45;
  transition:
    background 0.18s,
    color 0.18s,
    border-color 0.18s;
}
.button-primary {
  background: var(--accent);
  color: #fff;
  border: 1px solid var(--accent);
}
.button-primary:hover {
  background: #6c1e2b;
  border-color: #6c1e2b;
  color: #fff;
}
.text-link {
  font-size: 14.5px;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 7px;
}
.portrait {
  padding: 16px 0 0;
}
.portrait-frame {
  position: relative;
  background: #e9e9e3;
  border: 1px solid #e0e1d9;
  padding: 8px;
}
.portrait-frame::before {
  content: "";
  position: absolute;
  top: -15px;
  right: -15px;
  bottom: 14px;
  left: 14px;
  z-index: -1;
  background: #e9e9e3;
}
.portrait-frame img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  filter: saturate(0.88);
}
.portrait figcaption {
  font-size: 11px;
  color: var(--muted);
  display: flex;
  gap: 8px;
  align-items: center;
  margin-top: 18px;
  white-space: nowrap;
}
.portrait figcaption > span:last-child {
  margin-left: auto;
  font-size: 11px;
  font-variant-numeric: tabular-nums;
}
.portrait-line {
  height: 1px;
  width: 15px;
  background: var(--accent);
}
.research-strip {
  display: flex;
  gap: 50px;
  align-items: center;
  border-block: 1px solid var(--line);
  padding-block: 27px;
}
.small-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
}
.research-note {
  flex: 1;
}
.research-note p {
  font-family: var(--serif);
  font-size: 21.5px;
  line-height: 1.45;
  margin-top: 5px;
}
.metrics {
  display: flex;
  gap: 48px;
}
.metrics > div {
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.metric-number {
  font-family: var(--serif);
  font-size: 42px;
  line-height: 1.1;
  letter-spacing: -1px;
  font-variant-numeric: tabular-nums;
}
.metric-label {
  font-size: 12.5px;
  color: var(--muted);
}
.strip-link {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 12.5px;
  padding-left: 45px;
  border-left: 1px solid var(--line);
}
.section {
  padding-block: 72px;
  border-bottom: 1px solid var(--line);
}
.section-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 25px;
  margin-bottom: 32px;
}
.section-index {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--accent);
  gap: 8px;
}
.section h2,
.contact-section h2 {
  font: 400 46px/1.2 var(--serif);
  letter-spacing: -1.5px;
  margin-top: 12px;
}
html[data-language="zh"] .section h2,
html[data-language="zh"] .contact-section h2 {
  font-size: 38px;
  letter-spacing: 0.025em;
}
.section-heading > .text-link {
  padding-bottom: 6px;
}
.featured-grid {
  --work-gap: 28px;
  display: grid;
  grid-template-columns: none;
  grid-auto-flow: column;
  grid-auto-columns: calc((100% - var(--work-gap) - var(--work-gap)) / 3);
  gap: var(--work-gap);
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  scrollbar-width: thin;
  scrollbar-color: var(--line) transparent;
  padding-bottom: 16px;
}
.featured-grid:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 6px;
}
.featured-grid::-webkit-scrollbar {
  height: 4px;
}
.featured-grid::-webkit-scrollbar-thumb {
  background: var(--line);
  border-radius: 2px;
}
.work-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-top: 14px;
  font-size: 12.5px;
  color: var(--muted);
}
.work-nav {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}
.work-nav button {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--ink);
  background: transparent;
  font-size: 19px;
}
.work-nav button:not(:disabled):hover {
  color: var(--accent);
  border-color: var(--accent);
}
.work-nav button:disabled {
  opacity: 0.35;
  cursor: default;
}
.featured-paper {
  display: flex;
  flex-direction: column;
  min-width: 0;
  scroll-snap-align: start;
}
.featured-image {
  position: relative;
  display: block;
  border: 1px solid var(--line);
  background: #fff;
  aspect-ratio: 1.65;
  overflow: hidden;
}
.featured-image img {
  height: 100%;
  width: 100%;
  object-fit: contain;
  padding: 18px;
  transition: transform 0.25s;
}
.featured-image:hover img {
  transform: scale(1.04);
}
.image-arrow {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: var(--paper);
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  font-size: 17px;
}
.featured-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 5px;
  margin: 19px 0 9px;
  font-size: 11px;
  color: var(--muted);
}
.featured-meta > span:first-child {
  color: var(--accent);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.featured-paper h3 {
  font-size: 25px;
  font-family: var(--serif);
  font-weight: 400;
  line-height: 1.25;
  letter-spacing: -0.4px;
}
.featured-paper > p {
  color: var(--muted);
  font-size: 14.5px;
  margin-top: 12px;
  line-height: 1.75;
  margin-bottom: 18px;
}
.paper-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--accent);
}
.paper-links a {
  padding-block: 6px;
}
.paper-links a:hover {
  text-decoration: underline;
  text-underline-offset: 4px;
}
.featured-paper > .paper-links {
  margin-top: auto;
  padding-top: 14px;
}
.heading-count {
  font: 400 14.5px var(--sans);
  vertical-align: top;
  margin-left: 12px;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 50%;
  width: 28px;
  height: 28px;
  display: inline-grid;
  place-items: center;
  letter-spacing: 0;
}
.section-note {
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--muted);
  text-align: right;
}
.publication-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  padding: 0 0 20px;
}
.year-filters {
  display: flex;
  gap: 5px;
  flex-wrap: wrap;
}
.year-filters button {
  border: 1px solid transparent;
  background: transparent;
  padding: 8px 11px;
  font-size: 13.5px;
  color: var(--muted);
  min-height: 38px;
  border-radius: 3px;
}
.year-filters button:hover {
  color: var(--accent);
  background: var(--accent-soft);
}
.year-filters button[aria-pressed="true"] {
  color: #fff;
  background: var(--ink);
}
.paper-search {
  display: flex;
  align-items: center;
  gap: 9px;
  border-bottom: 1px solid #b7bbb1;
  color: var(--muted);
  padding: 6px 0;
  max-width: 250px;
}
.paper-search > span[aria-hidden] {
  font-size: 26px;
  line-height: 1;
}
.paper-search input {
  border: 0;
  min-width: 0;
  background: transparent;
  color: var(--ink);
  font-size: 13.5px;
  width: 185px;
  padding: 5px;
}
.paper-search input::placeholder {
  color: var(--muted);
}
.publication-status {
  font-size: 12.5px;
  color: var(--muted);
  padding-bottom: 12px;
}
.publication-row {
  display: grid;
  grid-template-columns: 55px minmax(0, 1fr) 150px;
  gap: 26px;
  padding: 27px 0;
  border-top: 1px solid var(--line);
  align-items: start;
}
.publication-year {
  font-family: var(--serif);
  color: var(--muted);
  font-size: 20px;
}
.publication-venue {
  font-size: 11px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.065em;
  text-transform: uppercase;
  margin-bottom: 6px;
}
.publication-content h3 {
  font-size: 18px;
  font-weight: 500;
  line-height: 1.55;
  text-wrap: pretty;
}
.publication-content h3 a:hover {
  text-decoration: underline;
  text-underline-offset: 4px;
}
.venue-full {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--muted);
  margin-top: 6px;
}
.publication-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 10px;
}
.publication-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  font-size: 11px;
  color: var(--muted);
}
.publication-tags span {
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 1px 6px;
}
.publication-thumbnail {
  background: #fff;
  border: 1px solid var(--line);
  align-self: center;
  padding: 7px;
}
.publication-thumbnail img {
  width: 100%;
  height: 88px;
  object-fit: contain;
}
.publication-empty {
  border-top: 1px solid var(--line);
  padding: 35px;
  text-align: center;
  color: var(--muted);
}
.publication-empty p {
  margin-bottom: 20px;
}
.button-secondary {
  background: transparent;
  color: var(--ink);
  border: 1px solid #bdc0b7;
}
.button-secondary:hover {
  background: var(--ink);
  color: #fff;
  border-color: var(--ink);
}
.show-publications {
  margin: 20px auto 0;
  display: flex;
  min-width: 240px;
}
.experience-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 90px;
}
.subsection-heading {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 25px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.small-count {
  font-size: 11px;
  font-weight: 400;
  color: var(--muted);
}
.education-list {
  border-left: 1px solid var(--line);
  margin-left: 4px;
}
.education-item {
  position: relative;
  padding-left: 25px;
  padding-bottom: 30px;
}
.education-item:last-child {
  padding-bottom: 0;
}
.timeline-dot {
  position: absolute;
  top: 7px;
  left: -4px;
  width: 7px;
  height: 7px;
  border: 1px solid var(--accent);
  border-radius: 50%;
  background: var(--paper);
}
.education-item:first-child .timeline-dot {
  background: var(--accent);
}
.education-date {
  font-size: 12.5px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}
.current-label {
  color: var(--accent);
  margin-left: 8px;
  font-size: 11px;
  border-bottom: 1px solid #d2b4b9;
}
.education-item h4 {
  font-size: 19px;
  font-weight: 500;
  margin: 7px 0 3px;
}
.education-item > p:last-child {
  font-size: 13.5px;
  color: var(--muted);
}
.project-list,
.honor-list,
.service-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.project-list li {
  border-top: 1px solid var(--line);
  padding: 13px 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--muted);
}
.project-list li:first-child {
  border: 0;
  padding-top: 0;
}
.project-list p,
.honor-list p,
.service-list p {
  margin: 0;
}
.recognition-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 90px;
}
.honor-list li {
  position: relative;
  font-size: 14.5px;
  line-height: 1.85;
  padding-left: 18px;
  margin-bottom: 15px;
  color: var(--muted);
}
.honor-list li::before {
  content: "—";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--accent);
  font-size: 12.5px;
}
.honor-list strong {
  color: var(--ink);
}
.service-intro {
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--muted);
}
.service-wordmarks {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px 15px;
  margin: 28px 0;
  font-family: var(--serif);
  font-size: 23.5px;
  color: #464d43;
}
.more-details {
  margin-top: 22px;
  border-top: 1px solid var(--line);
}
.more-details summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  font-size: 13.5px;
  font-weight: 500;
  padding: 15px 0;
  cursor: pointer;
  list-style: none;
}
.more-details summary::-webkit-details-marker {
  display: none;
}
.more-details summary:hover {
  color: var(--accent);
}
.details-icon {
  font-size: 21.5px;
  font-weight: 400;
  transition: transform 0.2s;
}
.more-details[open] .details-icon {
  transform: rotate(45deg);
}
.more-details[open] summary {
  margin-bottom: 10px;
}
.service-list li {
  padding: 10px 0;
  border-top: 1px solid var(--line);
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--muted);
}
.service-list a:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}
.hyp-pill {
  display: inline-block;
  font-size: 11px;
  padding: 0 4px;
  margin: 0 2px;
  border: 1px solid var(--line);
  border-radius: 3px;
  white-space: nowrap;
  color: var(--muted);
}
.contact-section {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 90px;
  padding-block: 70px 60px;
}
.contact-section h2 {
  font-size: 52px;
}
.contact-email {
  display: inline-flex;
  gap: 15px;
  align-items: center;
  font-size: 21.5px;
  margin-top: 24px;
  color: var(--accent);
  border-bottom: 1px solid #d6bdc1;
  padding-bottom: 5px;
  overflow-wrap: anywhere;
}
.contact-address {
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--muted);
  margin-top: 18px;
}
.contact-aside {
  padding-top: 28px;
}
.contact-aside blockquote {
  font: italic 25px/1.7 var(--serif);
  color: var(--muted);
  max-width: 370px;
}
.social-links {
  display: flex;
  gap: 25px;
  font-size: 12.5px;
  margin-top: 26px;
}
.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: center;
  padding-block: 24px;
  border-top: 1px solid var(--line);
  font-size: 11px;
  color: var(--muted);
}
.footer-name {
  font-size: 13.5px;
  color: var(--ink);
}
.footer-name span {
  padding-left: 10px;
  color: var(--muted);
}
.back-top {
  font-size: 12.5px;
}

@media (min-width: 1500px) {
  .hero {
    padding-top: 100px;
    padding-bottom: 85px;
  }
  .hero h1 {
    font-size: 89px;
  }
}

@media (max-width: 1100px) {
  .wrap,
  .header-inner {
    width: calc(100% - 64px);
  }
  .hero {
    grid-template-columns: minmax(0, 1fr) 235px;
    gap: 55px;
  }
  .hero h1 {
    font-size: 66px;
  }
  .desktop-nav {
    gap: 22px;
  }
  .hero-links {
    gap: 18px;
  }
  .metrics {
    gap: 30px;
  }
  .research-strip {
    gap: 30px;
  }
  .strip-link {
    padding-left: 25px;
  }
  .experience-grid,
  .recognition-grid,
  .contact-section {
    gap: 55px;
  }
  .featured-meta {
    font-size: 11px;
  }
  .featured-paper h3 {
    font-size: 22.5px;
  }
  .paper-search {
    max-width: 210px;
  }
  .year-filters button {
    padding: 8px;
  }
  .featured-grid {
    --work-gap: 22px;
  }
}

@media (max-width: 800px) {
  .header-inner {
    height: 72px;
  }
  .desktop-nav {
    gap: 16px;
  }
  .desktop-nav a {
    font-size: 13.5px;
  }
  .hero {
    padding-top: 60px;
    padding-bottom: 50px;
    grid-template-columns: minmax(0, 1fr) 190px;
    gap: 35px;
  }
  .hero h1 {
    font-size: 52px;
    letter-spacing: -2px;
  }
  html[data-language="zh"] .hero h1 {
    font-size: 64px;
  }
  .hero-bio {
    font-size: 14.5px;
  }
  .hero-bio p:first-child,
  .hero-bio p.lang-zh:nth-child(2) {
    font-size: 18px;
  }
  .portrait figcaption > span:last-child {
    display: none;
  }
  .hero-links {
    gap: 18px;
  }
  .hero-links .text-link {
    font-size: 12.5px;
  }
  .hero-links .button {
    padding: 11px 14px;
    gap: 16px;
    font-size: 13.5px;
  }
  .research-strip {
    gap: 25px;
  }
  .research-note p {
    font-size: 18px;
  }
  .metrics {
    gap: 23px;
  }
  .metric-number {
    font-size: 36px;
  }
  .strip-link {
    display: none;
  }
  .section {
    padding-block: 55px;
  }
  .section h2 {
    font-size: 39px;
  }
  .featured-grid {
    --work-gap: 18px;
    grid-auto-columns: calc((100% - var(--work-gap)) / 2);
  }
  .featured-image img {
    padding: 10px;
  }
  .featured-meta {
    justify-content: flex-start;
    gap: 3px 10px;
  }
  .featured-paper h3 {
    font-size: 23.5px;
  }
  .featured-paper > p {
    font-size: 13.5px;
  }
  .publication-controls {
    flex-wrap: wrap;
    gap: 12px;
  }
  .paper-search {
    max-width: none;
    width: 100%;
  }
  .paper-search input {
    width: 100%;
  }
  .publication-row {
    grid-template-columns: 44px minmax(0, 1fr) 115px;
    gap: 18px;
  }
  .publication-thumbnail img {
    height: 75px;
  }
  .publication-content h3 {
    font-size: 17px;
  }
  .experience-grid,
  .recognition-grid {
    gap: 35px;
  }
  .education-date {
    font-size: 11px;
  }
  .current-label {
    display: block;
    margin-left: 0;
    border: 0;
  }
  .service-wordmarks {
    grid-template-columns: repeat(3, 1fr);
    font-size: 22.5px;
    gap: 14px;
  }
  .contact-section {
    gap: 40px;
  }
  .contact-email {
    font-size: 17px;
  }
  .contact-aside blockquote {
    font-size: 21.5px;
  }
}

@media (max-width: 640px) {
  html {
    scroll-padding-top: 88px;
  }
  .wrap,
  .header-inner {
    width: calc(100% - 40px);
  }
  .header-inner {
    height: 66px;
    gap: 15px;
  }
  .wordmark {
    font-size: 31.5px;
  }
  .desktop-nav {
    display: none;
  }
  .header-actions {
    margin-left: auto;
  }
  .menu-button {
    display: flex;
    font-size: 13.5px;
  }
  .language-button {
    padding: 5px 10px;
    min-height: 36px;
  }
  .hero {
    padding-top: 42px;
    padding-bottom: 38px;
    grid-template-columns: minmax(0, 1fr);
    gap: 30px;
    position: relative;
  }
  .hero-copy {
    display: contents;
  }
  .hero .eyebrow {
    font-size: 11px;
    letter-spacing: 0.08em;
    grid-column: 1;
  }
  .hero h1 {
    grid-column: 1;
    font-size: 57px;
    letter-spacing: -2.5px;
    margin-top: 0;
    line-height: 1.1;
    max-width: calc(100% - 110px);
    white-space: normal;
  }
  .hero h1 .lang-en {
    display: block;
    max-width: 220px;
  }
  html[data-language="zh"] .hero h1 {
    font-size: 51px;
    margin-top: 16px;
    max-width: calc(100% - 110px);
  }
  .name-secondary {
    font-size: 14.5px;
    margin-top: -17px;
    max-width: calc(100% - 110px);
  }
  .name-divider {
    padding: 0 6px;
  }
  .portrait {
    position: absolute;
    right: 0;
    top: 87px;
    width: 102px;
    padding: 0;
  }
  .portrait-frame {
    padding: 4px;
  }
  .portrait-frame::before {
    top: -8px;
    right: -7px;
    bottom: 7px;
    left: 7px;
  }
  .portrait figcaption {
    font-size: 11px;
    margin-top: 10px;
    gap: 6px;
  }
  .portrait-line {
    width: 9px;
  }
  .hero-bio {
    margin-top: 0;
    font-size: 16px;
    line-height: 1.85;
    grid-column: 1;
  }
  .hero-bio p:first-child,
  .hero-bio p.lang-zh:nth-child(2) {
    font-size: 19px;
  }
  .hero-links {
    margin-top: -6px;
    gap: 18px;
  }
  .hero-links .button {
    min-height: 44px;
    padding: 11px 15px;
  }
  .hero-links .text-link {
    font-size: 13.5px;
  }
  .research-strip {
    padding-block: 23px;
    flex-wrap: wrap;
    gap: 23px;
  }
  .research-note {
    flex-basis: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
  }
  .research-note p {
    font-size: 18px;
    margin: 0;
  }
  .research-note .small-label {
    font-size: 11px;
    max-width: 90px;
  }
  .metrics {
    width: 100%;
    justify-content: space-between;
    padding-right: 20px;
    border-top: 1px solid var(--line);
    padding-top: 20px;
  }
  .metric-number {
    font-size: 38px;
  }
  .metric-label {
    font-size: 11px;
  }
  .section {
    padding-block: 44px;
  }
  .section-heading {
    gap: 15px;
    margin-bottom: 25px;
    align-items: flex-end;
  }
  .section h2 {
    font-size: 36px;
    letter-spacing: -1.1px;
  }
  html[data-language="zh"] .section h2 {
    font-size: 32.5px;
  }
  .section-heading > .text-link {
    font-size: 12.5px;
    gap: 3px;
    white-space: nowrap;
  }
  .section-index {
    font-size: 11px;
  }
  .featured-grid {
    --work-gap: 18px;
    grid-auto-columns: 88%;
  }
  .featured-image {
    aspect-ratio: 1.85;
  }
  .featured-image img {
    padding: 18px;
  }
  .featured-meta {
    justify-content: space-between;
    font-size: 11px;
    margin-top: 15px;
  }
  .featured-paper h3 {
    font-size: 28px;
  }
  .featured-paper > p {
    font-size: 16px;
    margin-top: 9px;
    margin-bottom: 10px;
  }
  .paper-links {
    font-size: 13.5px;
  }
  .section-note {
    display: none;
  }
  .heading-count {
    font-size: 12.5px;
    width: 24px;
    height: 24px;
    margin-left: 9px;
  }
  .publication-controls {
    gap: 15px;
  }
  .year-filters {
    gap: 2px;
  }
  .year-filters button {
    font-size: 12.5px;
    padding: 8px 9px;
  }
  .publication-row {
    grid-template-columns: 1fr;
    gap: 0;
    padding: 23px 0;
  }
  .publication-year {
    display: none;
  }
  .publication-thumbnail {
    display: none;
  }
  .publication-content h3 {
    font-size: 17px;
  }
  .venue-full {
    font-size: 12.5px;
  }
  .publication-bottom {
    gap: 10px;
  }
  .publication-tags {
    font-size: 11px;
  }
  .publication-status {
    font-size: 11px;
  }
  .show-publications {
    width: 100%;
    font-size: 13.5px;
  }
  .experience-grid,
  .recognition-grid {
    grid-template-columns: 1fr;
    gap: 38px;
  }
  .subsection-heading {
    margin-bottom: 22px;
    font-size: 17px;
  }
  .education-date {
    font-size: 12.5px;
  }
  .current-label {
    display: inline;
    margin-left: 8px;
  }
  .education-item h4 {
    font-size: 20px;
  }
  .education-item > p:last-child {
    font-size: 14.5px;
  }
  .project-list li {
    font-size: 14.5px;
  }
  .honor-list li {
    font-size: 14.5px;
  }
  .service-wordmarks {
    grid-template-columns: repeat(4, 1fr);
    font-size: 22.5px;
  }
  .contact-section {
    grid-template-columns: 1fr;
    gap: 32px;
    padding-block: 44px;
  }
  .contact-section h2 {
    font-size: 46px;
  }
  .contact-email {
    font-size: clamp(16px, 4.88vw, 21.5px);
    gap: 8px;
  }
  .contact-aside {
    padding-top: 0;
    border-top: 1px solid var(--line);
    padding-top: 25px;
  }
  .contact-aside blockquote {
    font-size: 23.5px;
    max-width: 100%;
  }
  .social-links {
    margin-top: 22px;
    font-size: 13.5px;
  }
  .site-footer {
    flex-wrap: wrap;
    gap: 10px;
    padding-block: 22px;
  }
  .site-footer p {
    order: 3;
    width: 100%;
    font-size: 11px;
  }
  .footer-name {
    font-size: 12.5px;
  }
}

@media (max-width: 370px) {
  .wrap,
  .header-inner {
    width: calc(100% - 32px);
  }
  .hero h1 {
    font-size: 47px;
  }
  .portrait {
    width: 88px;
  }
  .name-secondary {
    font-size: 12.5px;
  }
  .hero .eyebrow {
    font-size: 11px;
  }
  .hero-links {
    gap: 12px;
  }
  .hero-links .text-link {
    font-size: 12.5px;
  }
  .year-filters button {
    padding: 8px 7px;
  }
  .service-wordmarks {
    gap: 14px 8px;
    font-size: 20px;
  }
}

/* Mobile English names and portraits occupy separate grid columns. */
@media (max-width: 640px) {
  html[data-language="en"] .hero {
    grid-template-columns: minmax(0, 1fr) 102px;
    column-gap: 20px;
  }
  html[data-language="en"] .hero .eyebrow,
  html[data-language="en"] .hero-bio,
  html[data-language="en"] .hero-links {
    grid-column: 1 / -1;
  }
  html[data-language="en"] .hero h1 {
    grid-column: 1;
    grid-row: 2;
    max-width: none;
    font-size: clamp(40px, 12.5vw, 57px);
  }
  html[data-language="en"] .name-secondary {
    grid-column: 1;
    grid-row: 3;
    max-width: none;
  }
  html[data-language="en"] .portrait {
    position: static;
    grid-column: 2;
    grid-row: 2 / span 2;
    align-self: start;
  }
}
@media (max-width: 370px) {
  html[data-language="en"] .hero {
    grid-template-columns: minmax(0, 1fr) 88px;
    column-gap: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    transition: none !important;
    animation: none !important;
  }
}

@media print {
  .site-header,
  .hero-links,
  .publication-controls,
  .show-publications,
  .back-top,
  .publication-status,
  .publication-empty {
    display: none !important;
  }
  body {
    background: #fff;
    color: #000;
    font-size: 11px;
  }
  .wrap {
    width: 100%;
  }
  .hero {
    padding: 0 0 20px;
    gap: 30px;
    grid-template-columns: 1fr 150px;
  }
  .hero h1 {
    font-size: 42px;
  }
  .hero-bio {
    font-size: 12px;
  }
  .research-strip {
    padding: 15px 0;
  }
  .section {
    padding-block: 25px;
  }
  .featured-grid {
    grid-auto-flow: row;
    grid-auto-columns: auto;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    overflow: visible;
    scroll-snap-type: none;
  }
  .work-footer {
    display: none;
  }
  .publication-row[hidden] {
    display: grid !important;
  }
  .publication-row,
  .featured-paper,
  .education-item {
    break-inside: avoid;
  }
  .contact-section {
    padding: 25px 0;
  }
  .publication-thumbnail {
    display: none;
  }
  .publication-row {
    grid-template-columns: 45px 1fr;
  }
  .section h2 {
    font-size: 28px;
  }
  .portrait-frame::before {
    display: none;
  }
  .more-details {
    break-inside: avoid;
  }
}

/* The timestamp always belongs to the displayed snapshot, including on phones. */
.scholar-metrics {
  flex-shrink: 0;
}
.scholar-updated {
  margin-top: 12px;
  font-size: 11px;
  color: var(--muted);
  line-height: 1.6;
}
.scholar-updated > span {
  margin-right: 5px;
}
.scholar-updated time {
  font-variant-numeric: tabular-nums;
}
@media (max-width: 640px) {
  .scholar-metrics {
    width: 100%;
  }
  .scholar-updated {
    margin-top: 15px;
    font-size: 11px;
  }
}