:root {
  color-scheme: light;
  --paper: #fcfbfd;
  --ink: #2c2930;
  --muted: #706976;
  --purple: #653279;
  --purple-soft: #efe7f3;
  --orange: #a84c12;
  --orange-accent: #e77500;
  --line: #e4dee8;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 28px;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  font-size: 15px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--purple-soft); }

a {
  color: var(--purple);
  text-decoration: none;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

a:hover { text-decoration: underline; }

a:focus-visible {
  outline: 2px solid var(--purple);
  outline-offset: 5px;
  border-radius: 2px;
}

p, h1, h2, h3, dl, dd { margin: 0; }

.page {
  width: min(100% - 64px, 980px);
  margin-inline: auto;
}

.skip-link {
  position: absolute;
  top: 12px;
  left: 16px;
  z-index: 10;
  padding: 8px 14px;
  background: var(--paper);
  transform: translateY(-180%);
}

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

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding-block: 27px 21px;
  border-bottom: 1px solid var(--line);
}

.wordmark {
  color: var(--purple);
  font-size: 13px;
  font-weight: 650;
  letter-spacing: .015em;
  white-space: nowrap;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 27px;
}

nav a {
  color: var(--muted);
  font-size: 13px;
}

nav a:hover, nav a:focus-visible { color: var(--purple); }

.profile {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 186px;
  align-items: start;
  gap: 60px;
  padding-block: 48px 30px;
}

h1 {
  color: var(--purple);
  font-size: 36px;
  font-weight: 650;
  line-height: 1.25;
  letter-spacing: -.035em;
}

.chinese-name {
  display: inline-block;
  margin-left: 10px;
  color: var(--muted);
  font-size: 21px;
  font-weight: 400;
  letter-spacing: .06em;
  vertical-align: .08em;
}

.position {
  margin-top: 13px;
  font-size: 15px;
  font-weight: 600;
}

.affiliation {
  margin-top: 2px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.65;
}

.tsinghua { color: var(--purple); }
.princeton { color: var(--orange); }

.bio { margin-top: 23px; }
.bio p + p { margin-top: 11px; }

.portrait {
  width: 186px;
  height: 236px;
  margin-top: 5px;
  overflow: hidden;
  border-radius: 5px;
  background: var(--purple-soft);
}

.portrait img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 38%;
}

.profile-links, .paper-links {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 9px 23px;
  font-size: 13px;
  font-weight: 600;
}

.profile-links { margin-top: 20px; }
.profile-links span, .paper-links span { font-size: 12px; }

.availability {
  max-width: 82ch;
  margin-bottom: 36px;
  padding-left: 16px;
  border-left: 2px solid var(--purple);
  color: var(--muted);
  font-size: 13px;
  line-height: 1.8;
}

.availability a { white-space: nowrap; }

.section {
  display: grid;
  grid-template-columns: 156px minmax(0, 1fr);
  gap: 38px;
  padding-block: 32px 35px;
  border-top: 1px solid var(--line);
}

h2 {
  color: var(--purple);
  font-size: 17px;
  font-weight: 600;
  line-height: 1.5;
  letter-spacing: -.015em;
}

h3 {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  letter-spacing: -.015em;
}

.paper-status {
  margin-bottom: 9px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
}

.paper-status span { margin-inline: 5px; }
.publication h3 { font-size: 19px; }
.publication h3 a { color: var(--ink); }
.publication h3 a:hover { color: var(--purple); }

.authors {
  margin-top: 8px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.8;
}

.authors strong { color: var(--ink); font-weight: 600; }
.paper-summary { margin-top: 13px; font-size: 14px; }
.paper-links { margin-top: 12px; }

.experience {
  position: relative;
  padding-left: 17px;
  border-left: 2px solid var(--purple-soft);
}

.experience-princeton { border-left-color: var(--orange-accent); }
.experience-tsinghua { border-left-color: var(--purple); }
.experience + .experience { margin-top: 31px; }

.entry-heading {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 5px 16px;
}

.institution {
  display: block;
  margin-top: 1px;
  color: var(--purple);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: normal;
}

.experience-princeton .institution { color: var(--orange); }

.date {
  color: var(--muted);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.mentors {
  margin-top: 8px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.8;
}

.mentors > span[aria-hidden] { margin-inline: 3px; }
.experience > p:last-child { margin-top: 10px; font-size: 14px; }

.education-entry {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 10px 24px;
}

.education-entry + .education-entry { margin-top: 22px; }
.education-entry h3 { font-size: 15px; }
.education-location {
  display: inline-block;
  margin-left: 8px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: normal;
}
.education-entry > div > p { margin-top: 3px; font-size: 13px; color: var(--muted); }
.expected { font-size: 11px; }

.skills { display: grid; gap: 10px; }
.skills > div { display: grid; grid-template-columns: 132px minmax(0, 1fr); gap: 16px; }
.skills dt { color: var(--muted); font-size: 13px; }
.skills dd { font-size: 14px; }

footer {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 10px 24px;
  padding-block: 23px 30px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
}

footer > span > span { margin-left: 8px; }
footer a { overflow-wrap: anywhere; }

@media (max-width: 760px) {
  .page { width: calc(100% - 44px); }
  .profile { grid-template-columns: minmax(0, 1fr) 144px; gap: 30px; padding-top: 36px; }
  .portrait { width: 144px; height: 188px; }
  h1 { font-size: 31px; }
  .chinese-name { font-size: 18px; }
  .section { grid-template-columns: 126px minmax(0, 1fr); gap: 24px; }
  .education-entry { flex-wrap: wrap; gap: 5px; }
}

@media (max-width: 560px) {
  body { font-size: 14px; }
  .page { width: calc(100% - 40px); }
  .topbar { padding-block: 19px 16px; gap: 12px; }
  .wordmark { font-size: 12px; }
  nav { gap: 8px 14px; }
  nav a { font-size: 12px; }
  .profile { grid-template-columns: 1fr; gap: 24px; padding-block: 28px 26px; }
  .portrait { grid-row: 1; width: 116px; height: 145px; margin-top: 0; }
  h1 { font-size: 31px; }
  .chinese-name { margin-left: 8px; font-size: 18px; }
  .position { margin-top: 11px; font-size: 14px; }
  .affiliation { font-size: 13px; }
  .bio { margin-top: 19px; }
  .profile-links { margin-top: 17px; }
  .availability { margin-bottom: 28px; padding-left: 12px; font-size: 12px; }
  .section { grid-template-columns: 1fr; gap: 19px; padding-block: 26px 29px; }
  h2 { font-size: 17px; }
  .desktop-break { display: none; }
  .publication h3 { font-size: 18px; }
  .experience { padding-left: 14px; }
  .experience + .experience { margin-top: 27px; }
  .education-entry { justify-content: space-between; gap: 5px 18px; }
  .skills > div { grid-template-columns: 116px minmax(0, 1fr); gap: 10px; }
  .skills dd { font-size: 13px; }
  footer { padding-block: 20px 26px; }
}

@media (max-width: 360px) {
  .topbar { align-items: flex-start; }
  nav { column-gap: 10px; }
  .wordmark { max-width: 58px; white-space: normal; line-height: 1.5; }
  h1 { font-size: 28px; }
  .chinese-name { font-size: 17px; }
  .skills > div { grid-template-columns: 1fr; gap: 0; }
}

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

@media print {
  body { background: white; font-size: 11px; }
  .page { width: 100%; }
  .topbar, .skip-link, .profile-links { display: none; }
  .profile { padding-top: 0; gap: 30px; grid-template-columns: minmax(0, 1fr) 110px; }
  .portrait { width: 110px; height: 140px; }
  h1 { font-size: 26px; }
  .section { display: block; padding-block: 18px; }
  .section h2 { margin-bottom: 12px; }
  .desktop-break { display: none; }
  .publication, .experience, .education-entry, .skills { break-inside: avoid; }
  .experience + .experience { margin-top: 20px; }
  a { color: inherit; }
}