:root {
  --ink: #25313b;
  --muted: #65707b;
  --blue: #245e91;
  --line: #e3e7eb;
  --soft: #f6f8fa;
  --paper: #ffffff;
  --body-font: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  --heading-font: Georgia, "Times New Roman", "Songti SC", serif;
}
* { box-sizing: border-box; }
html { scroll-padding-top: 0; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--body-font); font-size: 16px; line-height: 1.72; -webkit-font-smoothing: antialiased; overflow-wrap: break-word; }
a { color: var(--blue); text-decoration: none; text-underline-offset: 3px; }
a:hover { text-decoration: underline; }
a:focus-visible, summary:focus-visible, button:focus-visible { outline: 2px solid var(--blue); outline-offset: 4px; border-radius: 2px; }
img { max-width: 100%; height: auto; }
p { margin: 0 0 16px; }
strong { font-weight: 600; }
h1, h2, h3, h4, h5, h6 { line-height: 1.3; color: var(--ink); }
h1, h2 { font-family: var(--heading-font); font-weight: 500; }
h1 { margin: 0 0 22px; font-size: 31px; }
h2 { font-size: 25px; margin: 0 0 21px; }
h3 { font-size: 17px; font-weight: 600; margin: 0 0 8px; }
h4, h5, h6 { font-size: 16px; margin: 20px 0 10px; }
.skip-link { position: fixed; top: -100px; left: 16px; background: var(--paper); padding: 12px 20px; border: 1px solid var(--blue); z-index: 30; }
.skip-link:focus { top: 10px; }
.masthead { position: sticky; top: 0; z-index: 20; background: var(--paper); border-bottom: 1px solid var(--line); }
.masthead-inner { max-width: 1140px; margin: auto; padding: 0 28px; min-height: 70px; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.site-name { font-size: 19px; font-weight: 600; color: var(--ink); white-space: nowrap; }
.site-nav { display: flex; gap: 28px; align-items: center; }
.site-nav a { padding: 21px 0; color: var(--muted); font-size: 14px; border-bottom: 2px solid transparent; }
.site-nav a:hover, .site-nav a[aria-current] { color: var(--blue); border-bottom-color: var(--blue); text-decoration: none; }
.site-shell { max-width: 1140px; margin: 0 auto; padding: 46px 28px 64px; display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 66px; align-items: start; }
.profile { position: sticky; top: 108px; align-self: start; max-height: calc(100vh - 130px); overflow-y: auto; scrollbar-width: thin; padding-right: 6px; font-size: 14px; line-height: 1.6; }
.portrait-link { display: block; width: 190px; }
.portrait { width: 190px; height: 190px; object-fit: cover; object-position: center; border-radius: 4px; display: block; }
.profile-name { font-family: var(--body-font); font-size: 24px; font-weight: 600; margin: 22px 0 0; }
.chinese-name { font-size: 16px; margin: 2px 0 14px; letter-spacing: .08em; }
.profile-role { margin: 0 0 12px; }
.profile-labs { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 12px; }
.lab-pill { display: inline-flex; align-items: center; border: 1px solid #c9d9e7; border-radius: 999px; padding: 3px 10px; background: #f3f7fb; color: var(--blue); font-size: 12px; line-height: 1.6; white-space: nowrap; }
.lab-pill:hover { background: #eaf1f8; text-decoration: none; }
.profile-location { color: var(--muted); font-size: 13px; margin-bottom: 18px; }
.profile-links { list-style: none; padding: 16px 0 0; margin: 0; border-top: 1px solid var(--line); }
.profile-links li { margin-bottom: 7px; }
.email-link { font-size: 13px; }
main { min-width: 0; }
main:focus { outline: none; }
.home-section { scroll-margin-top: 96px; margin-bottom: 37px; }
.home-section > h2 { border-bottom: 1px solid var(--line); padding-bottom: 11px; }
.home-section:last-child { margin-bottom: 0; }
.about-section h1 { font-size: 29px; margin-bottom: 21px; }
.about-section p { margin-bottom: 15px; }
.contact-note { color: var(--muted); font-size: 15px; }
.news-list { list-style: none; margin: 0; padding: 0; font-size: 14px; }
.news-list li { display: grid; grid-template-columns: 70px minmax(0, 1fr); gap: 18px; margin-bottom: 13px; }
.news-date { color: var(--muted); font-variant-numeric: tabular-nums; padding-top: 1px; }
.publication { display: grid; grid-template-columns: 40% minmax(0, 1fr); gap: 28px; align-items: center; margin-bottom: 29px; padding-bottom: 28px; border-bottom: 1px solid var(--line); }
.publication:last-child { margin-bottom: 0; padding-bottom: 0; border: 0; }
.publication-figure { display: block; }
.publication-figure img { display: block; width: 100%; height: auto; border: 0; padding: 0; background: var(--paper); box-shadow: 0 5px 12px rgba(37, 49, 59, .22); }
.publication-venue { margin-bottom: 7px; font-size: 12px; font-weight: 600; color: var(--blue); }
.publication-venue span { color: var(--muted); font-weight: 400; }
.publication h3 { font-size: 16px; line-height: 1.5; margin-bottom: 7px; }
.publication h3 a { color: var(--ink); }
.publication h3 a:hover { color: var(--blue); }
.publication-authors { font-size: 13px; line-height: 1.6; margin-bottom: 7px; }
.publication-summary { font-size: 13px; line-height: 1.65; color: var(--muted); margin-bottom: 10px; }
.publication-links { display: flex; flex-wrap: wrap; gap: 6px 15px; font-size: 12px; font-weight: 500; }
.education-item { display: grid; grid-template-columns: 153px minmax(0, 1fr); gap: 20px; margin-bottom: 23px; }
.education-date { color: var(--muted); font-size: 13px; font-variant-numeric: tabular-nums; padding-top: 2px; }
.education-item h3 { font-size: 15px; margin-bottom: 5px; }
.education-item p:not(.education-date) { font-size: 14px; margin-bottom: 5px; }
.education-item p:last-child { color: var(--muted); font-size: 13px; }
summary { cursor: pointer; color: var(--muted); font-size: 13px; }
.earlier-education p { font-size: 13px; margin-top: 10px; color: var(--muted); }
.resource-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px; }
.resource-list a { display: block; }
.resource-list strong { display: block; font-size: 14px; margin-bottom: 5px; }
.resource-list span { display: block; font-size: 12px; line-height: 1.6; color: var(--muted); }
.site-footer { border-top: 1px solid var(--line); }
.footer-inner { max-width: 1140px; margin: auto; padding: 22px 28px 28px; display: flex; justify-content: space-between; gap: 16px; color: var(--muted); font-size: 12px; }
.footer-inner a { color: var(--muted); }
.page-heading { padding-bottom: 20px; margin-bottom: 28px; border-bottom: 1px solid var(--line); }
.page-heading h1 { margin-bottom: 0; font-size: 29px; }
.article-meta { margin: 12px 0 0; color: var(--muted); font-size: 13px; }
.back-link { display: inline-block; margin-bottom: 16px; font-size: 13px; }
.prose h2 { margin-top: 34px; padding-bottom: 10px; border-bottom: 1px solid var(--line); }
.prose h3 { margin-top: 26px; }
.prose ul, .prose ol { padding-left: 24px; margin: 12px 0 22px; }
.prose li { margin-bottom: 6px; }
.prose blockquote { padding: 12px 18px; margin: 22px 0; border-left: 3px solid var(--line); background: var(--soft); color: var(--muted); }
.prose blockquote p:last-child { margin-bottom: 0; }
.prose hr { border: 0; border-top: 1px solid var(--line); margin: 30px 0; }
.prose pre { max-width: 100%; overflow-x: auto; padding: 16px; background: var(--soft); border: 1px solid var(--line); font-size: 13px; line-height: 1.6; }
.prose code { font-family: "SFMono-Regular", Consolas, monospace; font-size: .85em; }
.prose :not(pre) > code { background: var(--soft); padding: 2px 4px; }
.prose iframe { max-width: 100%; border: 1px solid var(--line); }
.prose audio, .prose video { max-width: 100%; }
.prose table { display: block; max-width: 100%; overflow-x: auto; border-collapse: collapse; margin: 22px 0; font-size: 14px; }
.prose th, .prose td { text-align: left; border: 1px solid var(--line); padding: 9px 12px; min-width: 85px; }
.prose th { background: var(--soft); }
.prose img { height: auto; }
.article-content > :first-child { margin-top: 0; }
.article-content [id] { scroll-margin-top: 96px; }
.article-toc { margin-top: 24px; border-top: 1px solid var(--line); padding-top: 16px; }
.article-toc summary { font-weight: 600; color: var(--ink); }
.article-toc nav { max-height: 24vh; overflow-y: auto; padding: 10px 4px 0 0; }
.article-toc a { display: block; font-size: 12px; color: var(--muted); margin: 7px 0; line-height: 1.5; }
.article-toc a.toc-subheading { margin-left: 12px; }
.note-entry { display: grid; grid-template-columns: 40% minmax(0, 1fr); gap: 28px; padding: 20px 0; border-bottom: 1px solid var(--line); align-items: center; }
.note-image img { width: 100%; height: auto; border: 0; padding: 0; display: block; background: var(--paper); box-shadow: 0 5px 12px rgba(37, 49, 59, .22); }
.prose .note-entry h3 { font-size: 16px; margin: 0 0 8px; }
.note-entry p { font-size: 13px; margin: 0; color: var(--muted); }
.comments { margin-top: 32px; border-top: 1px solid var(--line); padding-top: 16px; }
@media (max-width: 980px) {
  .site-shell { grid-template-columns: 190px minmax(0, 1fr); gap: 38px; }
  .portrait, .portrait-link { width: 170px; }
  .portrait { height: 170px; }
  .publication, .note-entry { grid-template-columns: 40% minmax(0, 1fr); gap: 22px; }
  .education-item { grid-template-columns: 130px minmax(0, 1fr); gap: 15px; }
  .resource-list { grid-template-columns: 1fr; gap: 16px; }
  .resource-list span { font-size: 13px; }
}
@media (max-width: 760px) {
  html { scroll-padding-top: 0; }
  .masthead-inner { padding: 12px 22px 0; flex-wrap: wrap; gap: 0; }
  .site-name { font-size: 17px; }
  .site-nav { width: 100%; gap: 24px; overflow-x: auto; scrollbar-width: none; }
  .site-nav a { padding: 10px 0; font-size: 13px; white-space: nowrap; }
  .site-shell { display: block; padding: 28px 22px 44px; }
  .profile { position: static; max-height: none; overflow: visible; padding-right: 0; margin-bottom: 30px; padding-bottom: 24px; border-bottom: 1px solid var(--line); }
  .profile-identity { display: flex; gap: 22px; align-items: center; }
  .portrait, .portrait-link { width: 112px; flex-shrink: 0; }
  .portrait { height: 112px; }
  .profile-name { font-size: 23px; margin: 0; }
  .chinese-name { margin-bottom: 8px; font-size: 14px; }
  .profile-role { margin: 0; font-size: 13px; }
  .profile-labs { margin: 17px 0 10px; }
  .profile-location { margin: 0 0 12px; }
  .profile-links { border: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px 18px; }
  .profile-links li { margin: 0; }
  .profile-links li:first-child { flex-basis: 100%; }
  .profile-links a { font-size: 13px; }
  .article-toc { margin-top: 18px; }
  .article-toc nav { max-height: 160px; }
  .home-section { scroll-margin-top: 124px; margin-bottom: 32px; }
  .about-section h1, .page-heading h1 { font-size: 27px; }
  h2 { font-size: 24px; }
  .publication, .note-entry { grid-template-columns: 40% minmax(0, 1fr); gap: 22px; }
  .education-item { grid-template-columns: 140px minmax(0, 1fr); }
  .footer-inner { padding: 20px 22px; flex-wrap: wrap; font-size: 11px; }
  .article-content [id] { scroll-margin-top: 124px; }
}
@media (max-width: 480px) {
  body { font-size: 15px; }
  .site-nav { justify-content: space-between; gap: 14px; }
  .site-nav a { font-size: 12px; }
  .news-list { font-size: 13px; }
  .news-list li { grid-template-columns: 58px minmax(0, 1fr); gap: 12px; }
  .publication, .note-entry { display: block; }
  .publication-figure, .note-image { display: block; width: 100%; margin-bottom: 20px; }
  .publication h3 { font-size: 15px; }
  .education-item { display: block; margin-bottom: 24px; }
  .education-date { margin-bottom: 7px; }
  .prose .note-entry h3 { font-size: 14px; }
}
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { scroll-behavior: auto !important; animation: none !important; transition: none !important; } }
@media print {
  .masthead, .profile, .site-footer, .comments, .back-link { display: none; }
  .site-shell { display: block; max-width: none; padding: 0; }
  body { font-size: 11pt; }
  a { color: inherit; }
  .publication, .education-item { break-inside: avoid; }
}
.more-link { font-size: 13px; }
/* Original social marks and the article's hierarchical contents menu. */
@font-face {
  font-family: icomoon;
  src: url('../fonts/icomoon.woff') format('woff');
  font-weight: normal;
  font-style: normal;
  font-display: block;
}
.icon-mail, .icon-github, .icon-twitter { font-family: icomoon; font-style: normal; font-weight: normal; line-height: 1; }
.icon-mail::before { content: '\e006'; }
.icon-github::before { content: '\e000'; }
.icon-twitter::before { content: '\e007'; }
.profile-links a { display: inline-flex; align-items: center; gap: 8px; }
.social-icon { display: inline-block; width: 16px; height: 16px; flex: 0 0 16px; object-fit: contain; }
.contents-sidebar { position: sticky; top: 100px; }
.contents-menu > summary { display: none; }
.contents-menu nav { max-height: 70vh; overflow-y: auto; padding-right: 8px; scrollbar-width: thin; }
.contents-menu a { display: block; color: var(--blue); font-size: 13px; line-height: 1.6; margin-bottom: 8px; }
.contents-menu a.toc-bold { font-weight: 700; }
#main h1, #main h2, #main h3, #main h4, #main h5, #main h6 { scroll-margin-top: 96px; }
@media (max-width: 760px) {
  .contents-sidebar { position: static; margin-bottom: 28px; padding-bottom: 18px; border-bottom: 1px solid var(--line); }
  .contents-menu > summary { display: list-item; color: var(--ink); font-weight: 600; }
  .contents-menu nav { max-height: 210px; padding-top: 12px; }
  #main h1, #main h2, #main h3, #main h4, #main h5, #main h6 { scroll-margin-top: 124px; }
}
@media print { .contents-sidebar { display: none; } }
/* Each project is a complete, distinct entry with its own metadata and resources. */
.project-section { margin-top: 44px; }
.prose .project-section > h2 { margin-top: 0; margin-bottom: 24px; }
.project-list { display: grid; gap: 20px; }
.project-block { padding: 24px 26px; border: 1px solid var(--line); border-left: 3px solid var(--blue); border-radius: 3px; background: #f8fafc; break-inside: avoid; }
.prose .project-block h3 { margin: 0 0 10px; font-size: 19px; line-height: 1.45; }
.project-block .project-meta { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 5px 20px; margin: 0 0 17px; color: var(--muted); font-size: 12px; }
.project-meta > span:last-child { font-variant-numeric: tabular-nums; }
.project-block .project-description { margin-bottom: 12px; font-size: 15px; }
.project-block .project-program { margin-bottom: 12px; color: var(--muted); font-size: 13px; }
.project-details { display: grid; gap: 7px; margin: 14px 0 0; font-size: 13px; }
.project-details > div { display: grid; grid-template-columns: 62px minmax(0, 1fr); gap: 12px; }
.project-details dt { color: var(--muted); }
.project-details dd { margin: 0; }
.project-links { display: flex; flex-wrap: wrap; gap: 8px 22px; margin-top: 20px; padding-top: 14px; border-top: 1px solid var(--line); font-size: 13px; }
.project-language-link { margin: 22px 0 0; font-size: 13px; }
@media (max-width: 480px) {
  .project-block { padding: 20px 18px; }
  .prose .project-block h3 { font-size: 17px; }
  .project-block .project-meta { display: grid; gap: 5px; }
  .project-section { margin-top: 36px; }
  .project-links { gap: 8px 18px; }
}
@media print { .project-block { background: none; border-left-color: var(--ink); } }