:root {
  --navy: #0c3155;
  --navy-deep: #071f38;
  --teal: #0c8f87;
  --teal-light: #d8f1ed;
  --blue: #2766ad;
  --ink: #14283d;
  --muted: #5d6f80;
  --line: #dce5ec;
  --paper: #f7fafb;
  --white: #fff;
  --shadow: 0 20px 55px rgba(12, 49, 85, .11);
  --radius: 18px;
  --container: 1140px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  text-rendering: optimizeLegibility;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button, input, textarea, select { font: inherit; }
.container { width: min(var(--container), calc(100% - 48px)); 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; z-index: 100; top: 12px; left: 12px; padding: 9px 14px; color: #fff; background: var(--navy); border-radius: 8px; transform: translateY(-160%); }
.skip-link:focus { transform: translateY(0); }
:focus-visible { outline: 3px solid rgba(12, 143, 135, .5); outline-offset: 3px; }

.site-header {
  position: sticky;
  z-index: 50;
  top: 0;
  border-bottom: 1px solid rgba(220, 229, 236, .86);
  background: rgba(255, 255, 255, .9);
  backdrop-filter: blur(16px);
}
.nav-wrap { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.brand { display: flex; align-items: center; gap: 11px; font-weight: 750; line-height: 1.2; letter-spacing: -.01em; }
.brand small { display: block; margin-top: 3px; color: var(--muted); font-size: 11px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; }
.brand-mark { width: 38px; height: 38px; display: grid; place-items: center; color: #fff; border-radius: 11px; background: linear-gradient(145deg, var(--navy), var(--teal)); font-family: Georgia, serif; font-size: 21px; }
.site-nav { display: flex; align-items: center; gap: 26px; color: #3c5266; font-size: 14px; font-weight: 600; }
.site-nav a { position: relative; transition: color .2s ease; }
.site-nav a:not(.nav-cta)::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -7px; height: 2px; background: var(--teal); transition: right .2s ease; }
.site-nav a:hover { color: var(--teal); }
.site-nav a:hover::after { right: 0; }
.nav-cta { padding: 9px 15px; color: #fff !important; border-radius: 9px; background: var(--navy); }
.nav-toggle { display: none; width: 42px; height: 42px; padding: 10px; border: 0; border-radius: 10px; background: var(--paper); cursor: pointer; }
.nav-toggle span:not(.sr-only) { display: block; height: 2px; margin: 4px 0; background: var(--navy); border-radius: 2px; }

.hero {
  position: relative;
  overflow: hidden;
  color: #fff;
  background:
    radial-gradient(circle at 82% 23%, rgba(39, 167, 160, .27), transparent 27%),
    radial-gradient(circle at 9% 0%, rgba(39, 102, 173, .35), transparent 34%),
    linear-gradient(132deg, var(--navy-deep), var(--navy));
}
.hero::before { content: ""; position: absolute; inset: 0; opacity: .18; background-image: linear-gradient(rgba(255,255,255,.06) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.06) 1px, transparent 1px); background-size: 52px 52px; mask-image: linear-gradient(to bottom, #000, transparent 90%); }
.hero-grid { position: relative; min-height: 650px; padding-block: 82px 70px; display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(280px, .65fr); align-items: center; gap: 86px; }
.hero-copy { max-width: 700px; }
.kicker, .eyebrow { margin: 0 0 14px; color: var(--teal); font-size: 13px; font-weight: 800; letter-spacing: .15em; text-transform: uppercase; }
.hero .kicker { display: inline-flex; align-items: center; gap: 10px; color: #77ded6; }
.hero .kicker::before { content: ""; width: 30px; height: 2px; background: currentColor; }
.hero h1 { margin: 0; font-family: Georgia, "Times New Roman", "Songti SC", serif; font-size: clamp(52px, 7vw, 86px); font-weight: 600; line-height: 1.08; letter-spacing: -.045em; }
.hero h1 span { display: block; margin-top: 10px; color: rgba(255,255,255,.69); font-family: Inter, sans-serif; font-size: 17px; font-weight: 600; letter-spacing: .16em; text-transform: uppercase; }
.role { margin: 27px 0 10px; color: #bfe8e5; font-size: 18px; font-weight: 700; }
.lead { max-width: 690px; margin: 0; color: rgba(255,255,255,.79); font-size: 18px; line-height: 1.9; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 33px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 10px 20px; border: 1px solid transparent; border-radius: 10px; font-size: 14px; font-weight: 750; transition: transform .2s ease, background .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: var(--navy-deep); background: #81e0d9; }
.button-ghost { color: #fff; border-color: rgba(255,255,255,.35); background: rgba(255,255,255,.05); }
.profile-meta { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 25px; color: rgba(255,255,255,.63); font-size: 13px; }
.profile-meta > * + *::before { content: "·"; margin-right: 16px; }
.profile-meta a:hover { color: #fff; }
.portrait-wrap { justify-self: end; width: min(100%, 330px); }
.portrait-frame { position: relative; aspect-ratio: 4 / 5; overflow: hidden; border: 1px solid rgba(255,255,255,.35); border-radius: 50% 50% 22px 22px; background: rgba(255,255,255,.08); box-shadow: 0 30px 70px rgba(0,0,0,.31); }
.portrait-frame::after { content: ""; position: absolute; inset: 10px; border: 1px solid rgba(255,255,255,.23); border-radius: inherit; pointer-events: none; }
.portrait-frame img { width: 100%; height: 100%; object-fit: cover; object-position: center 18%; }
.portrait-fallback { height: 100%; place-items: center; color: rgba(255,255,255,.75); font-family: Georgia, serif; font-size: 110px; }
.portrait-fallback:not([hidden]) { display: grid; }
.portrait-wrap > p { display: flex; justify-content: space-between; margin: 17px 4px 0; color: rgba(255,255,255,.65); font-size: 12px; }
.portrait-wrap strong { color: #fff; }
.highlight-grid { position: relative; z-index: 1; display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid rgba(255,255,255,.16); }
.highlight { padding: 27px 34px; display: flex; align-items: baseline; gap: 13px; border-right: 1px solid rgba(255,255,255,.16); }
.highlight:last-child { border-right: 0; }
.highlight strong { color: #7fe2da; font-family: Georgia, serif; font-size: 31px; line-height: 1; }
.highlight span { color: rgba(255,255,255,.67); font-size: 13px; }

.section { padding: 105px 0; }
.section-compact { padding-block: 88px; }
.section-tint { background: var(--paper); }
.section-dark { color: #fff; background: var(--navy-deep); }
.two-column { display: grid; grid-template-columns: minmax(240px, .72fr) minmax(0, 1.45fr); gap: 100px; }
.section-heading { max-width: 660px; }
.section-heading.centered { margin: 0 auto 52px; text-align: center; }
.section-heading h2 { margin: 0 0 18px; color: var(--navy); font-family: Georgia, "Times New Roman", "Songti SC", serif; font-size: clamp(34px, 5vw, 48px); font-weight: 600; line-height: 1.2; letter-spacing: -.025em; }
.section-heading > p:last-child { margin: 0; color: var(--muted); }
.section-heading.light h2 { color: #fff; }
.section-heading.light > p:last-child { color: rgba(255,255,255,.68); }
.sticky-heading { position: sticky; top: 114px; align-self: start; }
.news-list { border-top: 1px solid var(--line); }
.news-item { display: grid; grid-template-columns: 105px 1fr; gap: 24px; padding: 24px 0; border-bottom: 1px solid var(--line); }
.news-item time { color: var(--teal); font-size: 13px; font-weight: 750; letter-spacing: .04em; }
.news-item p, .news-item a { margin: 0; color: #334a5f; }
.news-item a:hover { color: var(--teal); }

.research-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 20px; }
.research-card { grid-column: span 2; position: relative; min-height: 310px; padding: 31px; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; box-shadow: 0 12px 36px rgba(12,49,85,.04); transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease; }
.research-card:nth-child(4) { grid-column: 2 / span 2; }
.research-card:hover { transform: translateY(-5px); border-color: #b7d9d6; box-shadow: var(--shadow); }
.card-index { display: inline-grid; width: 42px; height: 42px; place-items: center; color: var(--teal); border-radius: 12px; background: var(--teal-light); font-family: Georgia, serif; font-weight: 700; }
.research-card h3 { margin: 25px 0 12px; color: var(--navy); font-size: 20px; }
.research-card > p { margin: 0; color: var(--muted); font-size: 14px; }
.tags { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 23px; }
.tags span { padding: 4px 9px; color: #486273; border-radius: 999px; background: #f0f5f6; font-size: 11px; }

.publication-layout { display: grid; grid-template-columns: .9fr 1.1fr; align-items: start; gap: 80px; }
.publication-panel { padding: 36px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper); }
.panel-label { margin: 0 0 20px; color: var(--teal); font-size: 12px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.venue-list { display: grid; gap: 1px; overflow: hidden; border-radius: 12px; background: var(--line); }
.venue-list span { padding: 17px 20px; color: var(--navy); background: #fff; font-family: Georgia, serif; font-size: 17px; }
.panel-note { margin: 19px 0 0; color: var(--muted); font-size: 13px; }
.publication-item { display: grid; grid-template-columns: 64px 1fr; gap: 20px; padding: 20px 0; border-bottom: 1px solid var(--line); }
.publication-item:last-child { border-bottom: 0; }
.publication-item > span { color: var(--teal); font-weight: 750; }
.publication-item h3 { margin: 0; color: var(--navy); font-size: 16px; line-height: 1.5; }
.publication-item p, .publication-item small { margin: 5px 0 0; color: var(--muted); }

.project-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 48px; }
.project-card { min-height: 235px; padding: 30px; border: 1px solid rgba(255,255,255,.15); border-radius: var(--radius); background: rgba(255,255,255,.045); }
.project-card:hover { border-color: rgba(126, 226, 218, .5); }
.project-meta { margin: 0 0 35px !important; color: #71d5ce !important; font-size: 11px !important; font-weight: 750; letter-spacing: .07em; text-transform: uppercase; }
.project-card h3 { margin: 0 0 12px; font-size: 21px; }
.project-card > p { margin: 0; color: rgba(255,255,255,.64); font-size: 14px; }
.collaboration-row { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: 32px; padding-top: 26px; border-top: 1px solid rgba(255,255,255,.13); }
.collaboration-row strong { margin-right: 11px; font-size: 13px; }
.collaboration-row span { padding: 7px 12px; color: rgba(255,255,255,.7); border: 1px solid rgba(255,255,255,.16); border-radius: 999px; font-size: 12px; }

.timeline-layout { gap: 120px; }
.timeline { position: relative; }
.timeline::before { content: ""; position: absolute; top: 9px; bottom: 18px; left: 6px; width: 1px; background: var(--line); }
.timeline-item { position: relative; padding: 0 0 42px 42px; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-dot { position: absolute; top: 7px; left: 0; width: 13px; height: 13px; border: 3px solid #fff; border-radius: 50%; background: var(--teal); box-shadow: 0 0 0 1px var(--teal); }
.timeline-item time { color: var(--teal); font-size: 12px; font-weight: 800; letter-spacing: .04em; }
.timeline-item h3 { margin: 5px 0 5px; color: var(--navy); font-size: 19px; }
.timeline-item p { margin: 0; color: var(--muted); font-size: 14px; }

.recruitment { position: relative; overflow: hidden; color: #fff; background: linear-gradient(135deg, #0c3155, #0a575a); }
.recruitment::before { content: ""; position: absolute; width: 500px; height: 500px; right: -180px; top: -230px; border: 1px solid rgba(255,255,255,.12); border-radius: 50%; box-shadow: 0 0 0 70px rgba(255,255,255,.025), 0 0 0 140px rgba(255,255,255,.018); }
.recruitment-inner { position: relative; }
.recruitment-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.recruitment-grid article { padding: 27px; border: 1px solid rgba(255,255,255,.16); border-radius: 15px; background: rgba(255,255,255,.075); }
.recruitment-grid h3 { margin: 0 0 9px; font-size: 17px; }
.recruitment-grid p { margin: 0; color: rgba(255,255,255,.68); font-size: 14px; }
.recruitment-closing { margin: 30px 0 0; color: rgba(255,255,255,.7); text-align: center; font-size: 13px; }

.site-footer { color: #94a6b6; background: #06192b; }
.footer-inner { min-height: 132px; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.footer-inner div { display: flex; flex-direction: column; }
.footer-inner strong { color: #fff; }
.footer-inner span, .footer-inner p { margin: 3px 0 0; font-size: 12px; }

@media (max-width: 900px) {
  .hero-grid { min-height: auto; grid-template-columns: 1fr 250px; gap: 45px; padding-block: 70px 58px; }
  .hero h1 { font-size: 58px; }
  .two-column, .publication-layout { gap: 55px; }
  .research-card { grid-column: span 3; }
  .research-card:nth-child(4) { grid-column: span 3; }
  .project-grid { grid-template-columns: 1fr; }
  .project-card { min-height: auto; }
}

@media (max-width: 720px) {
  .container { width: min(100% - 32px, var(--container)); }
  .nav-wrap { min-height: 66px; }
  .nav-toggle { display: block; }
  .site-nav { position: absolute; top: 66px; left: 0; right: 0; display: none; padding: 17px 16px 22px; flex-direction: column; align-items: stretch; gap: 0; border-bottom: 1px solid var(--line); background: #fff; box-shadow: 0 18px 35px rgba(12,49,85,.12); }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 11px 9px; }
  .site-nav a::after { display: none; }
  .nav-cta { margin-top: 8px; text-align: center; }
  .hero-grid { grid-template-columns: 1fr; gap: 42px; padding-block: 55px 45px; }
  .hero h1 { font-size: 52px; }
  .lead { font-size: 16px; }
  .portrait-wrap { justify-self: center; width: 255px; }
  .highlight-grid { grid-template-columns: 1fr; padding-block: 7px; }
  .highlight { padding: 17px 4px; border-right: 0; border-bottom: 1px solid rgba(255,255,255,.13); }
  .highlight:last-child { border-bottom: 0; }
  .section, .section-compact { padding-block: 72px; }
  .two-column, .publication-layout { grid-template-columns: 1fr; gap: 36px; }
  .sticky-heading { position: static; }
  .section-heading.centered { margin-bottom: 35px; text-align: left; }
  .research-grid { grid-template-columns: 1fr; }
  .research-card, .research-card:nth-child(4) { grid-column: auto; min-height: auto; }
  .publication-panel { padding: 23px; }
  .recruitment-grid { grid-template-columns: 1fr; }
  .footer-inner { padding-block: 35px; flex-direction: column; align-items: flex-start; justify-content: center; }
}

@media (max-width: 430px) {
  .hero h1 { font-size: 45px; }
  .hero-actions { flex-direction: column; }
  .button { width: 100%; }
  .news-item { grid-template-columns: 1fr; gap: 5px; }
  .profile-meta { gap: 8px 14px; }
  .profile-meta > * + *::before { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}