/* Stronger text contrast while retaining the existing type hierarchy. */
:root { --ink:#171b20; --muted:#454b53; --plum:#234967; --selection-bg:#245b8f; }
::selection { background:var(--selection-bg); color:#fff; text-shadow:none; }
body { -webkit-font-smoothing:auto; }
/* Keep the narrower content and desktop margin navigation centered together. */
@media screen and (min-width:641px) {
  :root { --page-max-width:960px; }
  .page { max-width:var(--page-max-width); }
}
@media screen and (min-width:1000px) {
  :root { --page-content-width:min(var(--page-max-width),calc((100vw - 232px)*.85)); }
  .page { width:var(--page-content-width); margin-left:calc((100% - var(--page-content-width))/2 + 84px); }
  .nav-slot .top-nav, .nav-slot .top-nav.is-docked {
    left:calc((100% - var(--page-content-width))/2 - 84px);
  }
}
.collaborations, .research-interests>p:last-child { width:100%; max-width:none; text-wrap:wrap; }
@media screen {
  :root[data-theme="dark"] { --ink:#f5f2ed; --muted:#cbd1d8; --plum:#b8daf2; --link:#b8daf2; --selection-bg:#426f98; }
}

/* Comfortable body text, with bold reserved for headings and key phrases. */
@media screen {
  body { font-size:20px; font-weight:400; }
  .identity, .research-context, .research-interests li,
  .research-interests>p:last-child, .collaborations, .opportunity,
  .news-row p, #research .paper-highlights, .paper-summary,
  .paper-detail p, .paper-description, .research-copy p {
    font-size:20px; font-weight:400; line-height:1.55;
  }
  .research-lead { font-size:20px; font-weight:400; line-height:1.55; }
  .research-lead .keyword-data { color:#315574; }
  .research-lead .keyword-agents { color:#38674e; }
  .research-lead .keyword-human { color:#885a2d; }
  [data-theme="dark"] .research-lead .keyword-data { color:#a9cde8; }
  [data-theme="dark"] .research-lead .keyword-agents { color:#a7cfb2; }
  [data-theme="dark"] .research-lead .keyword-human { color:#e2bb8b; }

  /* Every section shares the page edges; prose fills its assigned grid column. */
  .bio-copy, .bio-copy p, .collaborations, .research-interests>p,
  .news-row p, .section-intro, .earlier,
  #research .paper-copy p, #research .paper h3, .paper-detail p {
    width:100%; max-width:none; min-width:0;
  }
  #research .paper, #research .paper:first-of-type { margin-inline:0; }
  .research-interests li h3 { font-size:25px; font-weight:700; }
  #research .paper h3 { font-size:23px; font-weight:700; line-height:1.35; }
  .authors, #research .authors, .honors li, .date,
  .affiliation, .contribution, .figure-caption, .section-intro {
    font-size:18px; font-weight:400; line-height:1.55;
  }
  #research .paper-meta, #research .paper-meta .venue,
  #research .paper-meta .venue-detail, #research .paper-resources,
  .profile-link, .status-label, summary, .detail-count {
    font-size:17px; font-weight:400;
  }
  .nav-slot .top-nav, .nav-slot .top-nav.is-docked { font-size:19px; font-weight:400; }
  h2, .research-interests .interest-label { font-size:42px; }
  strong, .research-context strong, .paper-highlights strong,
  #research .paper-highlights strong, .paper-summary strong,
  .research-interests .interest-keyword { font-weight:700; }

  .background-section .experience-row {
    grid-template-columns:60px minmax(0,1fr) 180px;
    column-gap:20px; padding:22px 0;
  }
  .background-section .experience-row p { font-size:20px; font-weight:400; line-height:1.55; }
  .background-section .experience-title { font-size:24px; line-height:1.3; margin-bottom:8px; }
  .institution-logo { width:60px; height:70px; margin-top:2px; }
  .institution-logo.nju::before { width:52px; height:65px; }
  .institution-logo.hkust { width:44px; height:70px; margin-left:8px; }
  .institution-logo.hkust img { width:443px; height:70px; }
  [data-theme="dark"] .institution-logo.hkust { background:transparent; }
  [data-theme="dark"] .institution-logo.hkust img { filter:brightness(1.8) saturate(.75); }
}

@media screen and (max-width:640px) {
  body { font-size:19px; }
  .identity, .research-context, .research-interests li,
  .research-interests>p:last-child, .collaborations, .opportunity,
  .news-row p, #research .paper-highlights, .paper-summary,
  .paper-detail p, .paper-description, .research-copy p { font-size:19px; }
  .research-lead { font-size:19px; }
  .research-interests li h3, #research .paper h3 { font-size:22px; }
  .research-interests ul { grid-template-columns:minmax(0,1fr); }
  .research-interests li { min-width:0; }
  h2, .research-interests .interest-label { font-size:38px; }
  .nav-slot .top-nav, .nav-slot .top-nav.is-docked { font-size:16px; }
  .background-section .experience-row { grid-template-columns:48px minmax(0,1fr); column-gap:14px; }
  .background-section .experience-row p { font-size:19px; }
  .background-section .experience-title { font-size:22px; }
  .experience-row .date { grid-column:2; text-align:left; }
  .institution-logo { width:48px; height:58px; }
  .institution-logo.nju::before { width:44px; height:55px; }
  .institution-logo.hkust { width:36px; height:58px; margin-left:6px; }
  .institution-logo.hkust img { width:367px; height:58px; }
  .honors li { grid-template-columns:92px minmax(0,1fr); gap:12px; }
}

/* Compact project rows: preserve complete figures and all research text. */
@media screen {
  #research .paper, #research .paper:first-of-type {
    grid-template-columns:minmax(0,40fr) minmax(0,60fr);
    column-gap:24px; padding:18px 20px 12px; margin-bottom:12px;
  }
  #research .paper h3 { font-size:21px; line-height:1.25; margin-bottom:5px; }
  #research .authors { font-size:16px; line-height:1.4; margin-bottom:6px; }
  #research .paper-highlights { font-size:18px; line-height:1.42; margin:6px 0; }
  #research .paper-highlights li { margin-bottom:4px; }
  #research .paper-resources { font-size:16px; padding-top:3px; }
  #research .paper-meta .venue, #research .paper-meta .venue-detail { font-size:15px; }
  #research .paper-meta .venue { font-weight:700; }
  #research .paper-thumbnail, #research .project-figure { padding-top:16px; }
  #research .figure-link img { width:100%; height:auto; max-height:220px; object-fit:contain; }
}
@media screen and (max-width:700px) {
  #research .paper, #research .paper:first-of-type {
    grid-template-columns:minmax(0,1fr); padding:0 14px 10px; row-gap:8px;
  }
  #research .paper h3 { font-size:20px; }
  #research .paper-highlights { font-size:18px; }
  #research .paper-thumbnail, #research .project-figure { padding-top:0; }
  #research .figure-link img { max-height:200px; }
}