:root {
  --ink: #17211e;
  --muted: #65716c;
  --paper: #f5f3ec;
  --white: #fffefa;
  --green: #123b34;
  --green-2: #2d6457;
  --lime: #cfe474;
  --line: #d9ddd5;
  --serif: "Noto Serif SC", "Songti SC", serif;
  --sans: "DM Sans", "Noto Sans SC", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 90px; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: var(--sans); line-height: 1.7; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
.skip-link { position: fixed; left: 12px; top: -80px; z-index: 100; padding: 8px 14px; background: var(--lime); color: var(--green); border-radius: 4px; }
.skip-link:focus { top: 12px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }

.site-header { position: sticky; top: 0; z-index: 20; background: rgba(245,243,236,.92); border-bottom: 1px solid rgba(23,33,30,.1); backdrop-filter: blur(12px); }
.header-inner { max-width: 1320px; height: 76px; margin: 0 auto; padding: 0 34px; display: flex; align-items: center; justify-content: space-between; }
.wordmark { display: flex; align-items: center; gap: 12px; font-weight: 700; }
.wordmark-mark { display: grid; place-items: center; width: 38px; height: 38px; border-radius: 50%; color: var(--paper); background: var(--green); font-family: var(--serif); font-size: 13px; letter-spacing: .04em; }
.wordmark-text { line-height: 1.1; }
.wordmark-text small { display: block; margin-top: 4px; color: var(--muted); font-size: 10px; font-weight: 500; letter-spacing: .12em; text-transform: uppercase; }
.primary-nav { display: flex; gap: clamp(15px, 1.8vw, 28px); align-items: center; }
.primary-nav a { position: relative; color: var(--muted); font-size: 14px; font-weight: 500; }
.primary-nav a::after { content: ""; position: absolute; height: 2px; left: 0; right: 100%; bottom: -10px; background: var(--green); transition: right .2s; }
.primary-nav a:hover, .primary-nav a.active { color: var(--green); }
.primary-nav a:hover::after, .primary-nav a.active::after { right: 0; }
.primary-nav .lang-switch { padding: 4px 9px; border: 1px solid #aab8b2; border-radius: 20px; color: var(--green); font-size: 11px; letter-spacing: .08em; }
.primary-nav .lang-switch::after { display: none; }
.primary-nav .lang-switch:hover { color: var(--white); background: var(--green); border-color: var(--green); }
.menu-button { display: none; border: 0; background: transparent; padding: 6px; }
.menu-button span:not(.sr-only) { display: block; width: 24px; height: 2px; margin: 5px; background: var(--green); }

.page-shell { max-width: 1320px; margin: 0 auto; padding: 56px 34px 0; display: grid; grid-template-columns: 270px minmax(0, 1fr); gap: 86px; }
.profile { position: sticky; top: 112px; align-self: start; }
.portrait-wrap { position: relative; margin-bottom: 26px; }
.portrait { width: 230px; aspect-ratio: 4/5; object-fit: cover; object-position: center 18%; border-radius: 2px; filter: saturate(.85) contrast(1.03); }
.portrait-accent { position: absolute; width: 62px; height: 62px; right: 12px; bottom: -12px; background: var(--lime); mix-blend-mode: multiply; }
.profile h1 { margin: 0; font-family: var(--serif); font-size: 30px; letter-spacing: .08em; }
.name-en { margin: 0; color: var(--muted); font-size: 12px; letter-spacing: .18em; text-transform: uppercase; }
.role { margin: 16px 0 0; font-size: 14px; font-weight: 600; line-height: 1.7; }
.profile-rule { width: 40px; margin: 18px 0; border-top: 2px solid var(--lime); }
.affiliation { margin: 0 0 22px; color: var(--muted); font-size: 13px; }
.profile-links { display: grid; gap: 10px; }
.profile-link { display: flex; gap: 10px; align-items: center; color: var(--muted); font-size: 13px; }
.profile-link:hover { color: var(--green); }
.icon { display: grid; place-items: center; width: 24px; height: 24px; border: 1px solid var(--line); border-radius: 50%; color: var(--green); font-size: 11px; font-weight: 700; }
.contact-button { display: flex; justify-content: space-between; align-items: center; width: 100%; max-width: 230px; margin-top: 24px; padding: 11px 16px; background: var(--green); color: var(--white); font-size: 13px; transition: transform .2s, background .2s; }
.contact-button:hover { background: var(--green-2); transform: translateY(-2px); }

.content { min-width: 0; }
.hero { min-height: 630px; padding: 28px 0 70px; border-bottom: 1px solid var(--line); }
.eyebrow, .section-index { margin: 0 0 20px; color: var(--green-2); font-size: 11px; font-weight: 700; letter-spacing: .16em; }
.hero h2 { max-width: 850px; margin: 0; font-family: var(--serif); font-size: clamp(48px, 6.2vw, 84px); line-height: 1.18; letter-spacing: -.04em; }
.hero h2 em { color: var(--green-2); font-style: normal; }
.hero-copy { max-width: 760px; margin: 32px 0 28px; color: #48544f; font-size: 19px; line-height: 1.9; }
.topic-row { display: flex; flex-wrap: wrap; gap: 9px; }
.topic-row span { padding: 6px 11px; border: 1px solid #b9c8c1; border-radius: 30px; color: var(--green); font-size: 12px; }
.hero-meta { margin-top: 65px; padding-top: 22px; border-top: 1px solid var(--line); display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.hero-meta div { display: grid; gap: 3px; }
.hero-meta strong { color: var(--green); font-family: var(--serif); font-size: 19px; }
.hero-meta span { color: var(--muted); font-size: 12px; }

.section { padding: 92px 0; border-bottom: 1px solid var(--line); }
.section-heading { max-width: 780px; margin-bottom: 42px; }
.section-heading h2, .contact-section h2 { margin: 0; font-family: var(--serif); font-size: clamp(34px, 4vw, 51px); line-height: 1.3; letter-spacing: -.03em; }
.section-heading > p:last-child { max-width: 610px; color: var(--muted); font-size: 16px; }
.split-heading { max-width: none; display: flex; justify-content: space-between; align-items: end; gap: 30px; }
.text-link { padding-bottom: 5px; border-bottom: 1px solid var(--green); color: var(--green); font-size: 13px; white-space: nowrap; }

.research-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 14px; }
.research-card { position: relative; min-height: 245px; padding: 28px; background: var(--white); border: 1px solid #e1e3dc; overflow: hidden; }
.research-card.featured { grid-row: span 2; min-height: 504px; color: var(--white); background: var(--green); border: 0; display: flex; flex-direction: column; justify-content: space-between; }
.card-number { color: #8b9792; font-size: 11px; letter-spacing: .14em; }
.featured .card-number { color: #abc1b8; }
.research-card h3 { margin: 20px 0 12px; font-family: var(--serif); font-size: 24px; }
.research-card p { margin: 0; color: var(--muted); font-size: 14px; }
.research-card.featured p { max-width: 460px; color: #ccdad5; font-size: 15px; }
.research-card svg { width: 100%; margin-top: 60px; overflow: visible; }
.research-card svg path { fill: none; stroke: var(--lime); stroke-width: 2; stroke-dasharray: 5 7; }
.research-card svg circle { fill: var(--lime); }
.methods { margin-top: 28px; display: grid; grid-template-columns: 100px 1fr; align-items: start; gap: 30px; }
.methods > span { color: var(--muted); font-size: 12px; }
.methods > div { display: flex; gap: 10px 22px; flex-wrap: wrap; }
.methods b { font-size: 13px; font-weight: 600; }

.publication-list { border-top: 2px solid var(--ink); }
.publication { position: relative; display: grid; grid-template-columns: 62px minmax(0, 1fr) 72px; gap: 20px; padding: 27px 0; border-bottom: 1px solid var(--line); transition: padding .2s, background .2s; }
.publication:hover { padding-left: 12px; padding-right: 12px; background: rgba(255,254,250,.68); }
.pub-year { padding-top: 4px; color: var(--green-2); font-weight: 600; font-size: 12px; }
.publication h3 { margin: 0 0 8px; font-family: var(--serif); font-size: 17px; line-height: 1.55; }
.publication p { margin: 0; color: var(--muted); font-size: 12px; }
.quartile { justify-self: end; align-self: start; padding: 3px 7px; border: 1px solid #b9c8c1; color: var(--green); font-size: 10px; }
.more-publications { margin-top: 20px; }
.more-publications summary { cursor: pointer; list-style: none; display: flex; justify-content: space-between; padding: 14px 0; font-size: 13px; font-weight: 600; }
.more-publications summary::-webkit-details-marker { display: none; }
.more-publications[open] summary span { transform: rotate(45deg); }
.more-publications summary span { transition: transform .2s; }
.details-body { padding: 5px 22px 12px; border-left: 2px solid var(--lime); }
.details-body p { color: var(--muted); font-size: 13px; }

.project-timeline { border-top: 1px solid var(--ink); }
.project-timeline article { display: grid; grid-template-columns: 130px 1fr; gap: 28px; padding: 28px 0; border-bottom: 1px solid var(--line); }
.project-date { color: var(--green-2); font-size: 13px; font-weight: 600; }
.project-type { margin: 0 0 7px; color: var(--muted); font-size: 11px; letter-spacing: .03em; }
.project-timeline h3 { margin: 0; font-family: var(--serif); font-size: 18px; line-height: 1.55; }
.project-code { margin: 6px 0 0; color: var(--muted); font-size: 11px; }

.activity-list { border-top: 2px solid var(--ink); }
.activity-item { display: grid; grid-template-columns: 112px minmax(0, 1fr); gap: 30px; padding: 32px 0; border-bottom: 1px solid var(--line); }
.activity-item time { padding-top: 5px; color: var(--green-2); font-family: var(--serif); font-size: 17px; font-weight: 700; }
.activity-type { display: inline-block; margin-bottom: 9px; padding: 3px 8px; border-radius: 2px; color: var(--green); background: rgba(207,228,116,.42); font-size: 10px; font-weight: 700; letter-spacing: .05em; text-transform: uppercase; }
.activity-content h3 { max-width: 760px; margin: 0 0 9px; font-family: var(--serif); font-size: 18px; line-height: 1.55; }
.activity-content p { margin: 0; color: var(--muted); font-size: 12px; }
.activity-content a { display: inline-block; margin-top: 12px; padding-bottom: 2px; border-bottom: 1px solid #9caf68; color: var(--green-2); font-size: 11px; font-weight: 600; }
.activity-content a:hover { color: var(--green); border-color: var(--green); }

.experience-grid { display: grid; grid-template-columns: repeat(2, 1fr); border-top: 1px solid var(--ink); border-left: 1px solid var(--line); }
.experience-item { min-height: 155px; padding: 24px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.experience-item time { color: var(--green-2); font-size: 11px; font-weight: 600; }
.experience-item h3 { margin: 22px 0 3px; font-family: var(--serif); font-size: 18px; }
.experience-item p { margin: 0; color: var(--muted); font-size: 13px; }
.teaching { margin-top: 48px; padding: 28px; color: var(--white); background: var(--green); display: grid; grid-template-columns: 1.5fr 1fr; gap: 8px 28px; }
.teaching .section-index { grid-column: 1/-1; color: var(--lime); margin-bottom: 4px; }
.teaching h3 { grid-row: span 2; margin: 0; font-family: var(--serif); font-size: 28px; }
.teaching p { margin: 0; color: #d8e2de; font-size: 13px; }
.teaching p span { display: inline-block; width: 60px; color: var(--lime); }

.contact-section { margin-top: 92px; padding: 72px; background: var(--green); color: var(--white); }
.contact-section .section-index { color: var(--lime); }
.contact-row { display: flex; justify-content: space-between; align-items: end; gap: 30px; margin-top: 50px; }
.contact-row a { color: var(--lime); font-size: 18px; border-bottom: 1px solid var(--lime); }
.contact-row p { margin: 0; color: #c4d1cc; font-size: 12px; text-align: right; }
footer { max-width: 1320px; margin: 0 auto; padding: 30px 34px 36px 390px; display: flex; justify-content: space-between; gap: 22px; color: var(--muted); font-size: 11px; }
.news-intro { padding: 48px 0 64px; border-bottom: 1px solid var(--line); }
.news-intro h2 { margin: 0; font-family: var(--serif); font-size: clamp(52px, 7vw, 88px); line-height: 1.15; letter-spacing: -.04em; }
.news-intro > p:last-child { margin: 22px 0 0; color: var(--muted); font-size: 17px; }

.reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: none; }

@media (max-width: 980px) {
  .page-shell { grid-template-columns: 220px minmax(0,1fr); gap: 45px; }
  .portrait { width: 200px; }
  .primary-nav { gap: 20px; }
  .hero-meta { grid-template-columns: 1fr; gap: 16px; }
  footer { padding-left: 299px; }
}

@media (max-width: 760px) {
  .header-inner { height: 66px; padding: 0 20px; }
  .menu-button { display: block; }
  .primary-nav { position: absolute; left: 0; right: 0; top: 66px; padding: 18px 20px 24px; background: var(--paper); border-bottom: 1px solid var(--line); flex-direction: column; align-items: flex-start; gap: 17px; opacity: 0; pointer-events: none; transform: translateY(-8px); transition: .2s; }
  .primary-nav.open { opacity: 1; pointer-events: auto; transform: none; }
  .page-shell { display: block; padding: 32px 20px 0; }
  .profile { position: relative; top: auto; display: grid; grid-template-columns: 120px 1fr; column-gap: 20px; padding-bottom: 35px; border-bottom: 1px solid var(--line); }
  .portrait-wrap { grid-row: span 6; margin: 0; }
  .portrait { width: 120px; aspect-ratio: 4/5; }
  .portrait-accent { width: 38px; height: 38px; right: -5px; }
  .profile h1 { font-size: 24px; }
  .role { margin-top: 10px; font-size: 12px; }
  .profile-rule, .affiliation { display: none; }
  .profile-links { gap: 7px; margin-top: 12px; }
  .profile-link { font-size: 11px; }
  .profile-link:first-child span:last-child { max-width: 150px; overflow: hidden; }
  .contact-button { display: none; }
  .hero { min-height: auto; padding: 62px 0 60px; }
  .hero h2 { font-size: clamp(39px, 12vw, 58px); }
  .hero-copy { font-size: 16px; }
  .section { padding: 68px 0; }
  .research-grid { grid-template-columns: 1fr; }
  .research-card.featured { grid-row: auto; min-height: 410px; }
  .split-heading { align-items: flex-start; flex-direction: column; }
  .publication { grid-template-columns: 48px minmax(0,1fr); }
  .quartile { display: none; }
  .project-timeline article { grid-template-columns: 1fr; gap: 8px; }
  .activity-item { grid-template-columns: 1fr; gap: 8px; padding: 26px 0; }
  .experience-grid { grid-template-columns: 1fr; }
  .teaching { grid-template-columns: 1fr; }
  .teaching h3 { margin-bottom: 15px; }
  .contact-section { margin-left: -20px; margin-right: -20px; padding: 56px 20px; }
  .contact-row { align-items: flex-start; flex-direction: column; }
  .contact-row p { text-align: left; }
  footer { padding: 28px 20px; flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}