:root {
  --navy: #002147;
  --navy-deep: #00162f;
  --navy-soft: #12395d;
  --gold: #c6a15b;
  --gold-light: #e3c88f;
  --warm: #f7f4ee;
  --paper: #fffdf9;
  --ink: #20242b;
  --muted: #626873;
  --line: #d9d5cc;
  --white-line: rgba(255, 255, 255, .2);
  --serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", "Palatino Linotype", Georgia, serif;
  --sans: "Work Sans", "Noto Sans SC", "Source Han Sans SC", "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  --container: 1320px;
  --header-height: 82px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: var(--header-height); }
body {
  margin: 0;
  color: var(--ink);
  background: var(--warm);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: clip;
}
body.menu-open { overflow: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
p, h1, h2, h3, h4, figure, dl, dd { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }
svg { display: block; }
::selection { color: var(--navy); background: var(--gold-light); }
:focus-visible { outline: 3px solid var(--gold); outline-offset: 5px; }
.container { width: min(var(--container), calc(100% - 96px)); margin-inline: auto; }
.section { padding: 126px 0; position: relative; }
.bilingual-pair { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 34px; }
.bilingual-pair > * { min-width: 0; }
[lang="en"] { line-height: 1.62; }
.skip-link { position: fixed; z-index: 1000; top: 12px; left: 12px; padding: 10px 16px; color: var(--navy); background: var(--gold-light); transform: translateY(-180%); }
.skip-link:focus { transform: translateY(0); }

.site-header { position: fixed; z-index: 100; inset: 0 0 auto; height: var(--header-height); color: #fff; border-bottom: 1px solid rgba(255,255,255,.16); transition: background-color .22s ease, color .22s ease, border-color .22s ease; }
.site-header.is-scrolled { color: var(--navy); background: rgba(247,244,238,.98); border-color: var(--line); }
.header-inner { width: min(1440px, calc(100% - 64px)); height: 100%; margin: auto; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 13px; flex: 0 0 auto; }
.brand-mark { display: grid; place-items: center; width: 42px; height: 42px; border: 1px solid var(--gold); color: var(--gold-light); font: 20px/1 Georgia, serif; letter-spacing: -.05em; }
.is-scrolled .brand-mark { color: var(--navy); }
.brand-name { display: flex; flex-direction: column; line-height: 1.15; }
.brand-name strong { font-family: var(--serif); font-size: 17px; font-weight: 600; letter-spacing: .12em; }
.brand-name small { margin-top: 5px; font-size: 10px; letter-spacing: .12em; opacity: .72; }
.site-nav { display: flex; align-items: stretch; align-self: stretch; }
.site-nav a { position: relative; display: flex; flex-direction: column; justify-content: center; min-width: 68px; padding: 0 11px; line-height: 1.2; text-align: center; }
.site-nav a::after { content: ""; position: absolute; right: 11px; bottom: -1px; left: 11px; height: 2px; background: var(--gold); transform: scaleX(0); transform-origin: left; transition: transform .2s ease; }
.site-nav a:hover::after, .site-nav a.is-active::after { transform: scaleX(1); }
.site-nav span { font-size: 13px; letter-spacing: .08em; }
.site-nav small { margin-top: 5px; font-size: 9px; opacity: .66; }
.site-nav .nav-contact { margin-left: 12px; padding-inline: 20px; color: var(--navy); background: var(--gold-light); align-self: center; min-height: 44px; }
.site-nav .nav-contact::after { display: none; }
.site-nav .nav-contact small { opacity: .8; }
.menu-toggle { display: none; align-items: center; gap: 12px; min-width: 48px; min-height: 48px; padding: 0; color: inherit; background: none; border: 0; cursor: pointer; }
.menu-label { font-size: 13px; }
.menu-lines { display: grid; gap: 7px; width: 25px; }
.menu-lines i { display: block; height: 1px; background: currentColor; transition: transform .2s ease; }
.menu-toggle[aria-expanded="true"] .menu-lines i:first-child { transform: translateY(4px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] .menu-lines i:last-child { transform: translateY(-4px) rotate(-45deg); }

.hero { position: relative; min-height: 100svh; padding: 142px 0 96px; display: flex; align-items: center; color: #fff; background: var(--navy); overflow: hidden; }
.hero::before { content: "YS"; position: absolute; left: -2vw; bottom: -16vw; color: transparent; -webkit-text-stroke: 1px rgba(198,161,91,.11); font: 600 46vw/1 Georgia, serif; letter-spacing: -.12em; pointer-events: none; }
.hero-rule { position: absolute; top: 0; bottom: 0; left: calc(50% + 190px); width: 1px; background: rgba(255,255,255,.08); }
.hero-grid { position: relative; display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(340px, .8fr); gap: 76px; align-items: center; }
.hero-copy { position: relative; z-index: 2; }
.eyebrow { display: flex; align-items: center; gap: 13px; color: var(--navy-soft); font-size: 11px; font-weight: 600; letter-spacing: .17em; text-transform: uppercase; }
.eyebrow::before { content: ""; width: 38px; height: 2px; flex: 0 0 auto; background: var(--gold); }
.eyebrow.light { color: var(--gold-light); }
.hero h1 { margin-top: 25px; font-family: var(--serif); font-weight: 500; line-height: 1; }
.hero h1 span { display: block; }
.hero h1 span:first-child { font-size: clamp(64px, 7.3vw, 108px); letter-spacing: .1em; }
.hero h1 span:last-child { margin-top: 19px; color: var(--gold-light); font: 400 clamp(31px, 3.4vw, 52px)/1.1 Georgia, serif; letter-spacing: .015em; }
.hero-role { margin-top: 42px; padding-top: 27px; border-top: 1px solid var(--white-line); }
.hero-role h2 { font-family: var(--serif); font-size: 20px; font-weight: 500; line-height: 1.55; }
.hero-role [lang="en"] h2 { font-family: Georgia, serif; font-size: 19px; line-height: 1.4; }
.hero-role p { margin-top: 14px; color: rgba(255,255,255,.72); font-size: 14px; line-height: 1.8; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 32px; }
.button { display: inline-flex; flex-direction: column; justify-content: center; min-height: 58px; padding: 11px 23px; border: 1px solid transparent; line-height: 1.25; transition: color .2s ease, background-color .2s ease, border-color .2s ease, transform .2s ease; }
.button:hover { transform: translateY(-2px); }
.button span { font-size: 14px; }
.button small { margin-top: 5px; font-size: 10px; }
.button-gold { color: var(--navy); background: var(--gold-light); }
.button-gold:hover { background: #f0dbaf; }
.button-ghost { border-color: rgba(255,255,255,.4); }
.button-ghost:hover { border-color: var(--gold-light); color: var(--gold-light); }
.hero-facts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 38px; }
.hero-facts > div { padding-top: 14px; border-top: 1px solid rgba(198,161,91,.55); }
.hero-facts dt { font-family: var(--serif); font-size: 15px; }
.hero-facts dd { margin-top: 3px; color: rgba(255,255,255,.55); font-size: 10px; line-height: 1.4; }
.hero-portrait { position: relative; z-index: 1; align-self: center; }
.portrait-frame { position: relative; margin: 0 20px 20px 0; }
.portrait-frame::before { content: ""; position: absolute; z-index: -1; inset: 20px -20px -20px 20px; border: 1px solid var(--gold); }
.portrait-frame::after { content: ""; position: absolute; top: 0; right: 0; width: 74px; height: 5px; background: var(--gold-light); }
.hero-portrait img { width: 100%; height: auto; aspect-ratio: 4 / 5; object-fit: cover; object-position: 52% center; }
.hero-portrait figcaption { display: flex; justify-content: space-between; gap: 10px; margin-top: 32px; color: var(--gold-light); font: 11px/1.3 Georgia, serif; letter-spacing: .12em; }
.scroll-cue { position: absolute; right: 32px; bottom: 32px; display: flex; align-items: center; gap: 9px; color: rgba(255,255,255,.6); font-size: 10px; line-height: 1.25; writing-mode: vertical-rl; }
.scroll-cue small { font-size: 9px; }
.scroll-cue i { display: block; width: 1px; height: 38px; margin-top: 7px; background: var(--gold); }

.section-heading { margin-bottom: 64px; }
.section-heading h2 { margin-top: 22px; font-family: var(--serif); font-weight: 500; line-height: 1.35; }
.section-heading h2 span { display: block; }
.section-heading h2 span:first-child { font-size: clamp(32px, 3.4vw, 52px); letter-spacing: .015em; }
.section-heading h2 span:last-child { max-width: 900px; margin-top: 12px; color: var(--muted); font: 400 clamp(20px, 2vw, 29px)/1.35 Georgia, serif; }
.split-heading { display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(300px, .75fr); gap: 70px; align-items: end; }
.heading-note { padding-top: 22px; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }
.heading-note p + p { padding-left: 25px; border-left: 1px solid var(--line); }

.about { background: var(--paper); }
.about-grid { display: grid; grid-template-columns: minmax(280px, .75fr) minmax(0, 1.55fr); gap: 76px; align-items: start; }
.about-portrait { position: sticky; top: 112px; }
.about-portrait picture { border-top: 5px solid var(--navy); }
.about-portrait img { width: 100%; aspect-ratio: 4 / 5; object-fit: cover; }
.about-portrait figcaption { display: flex; justify-content: space-between; margin-top: 12px; color: var(--muted); font-size: 10px; letter-spacing: .15em; text-transform: uppercase; }
.lead-pair { gap: 42px; }
.lead-pair > div + div { padding-left: 36px; border-left: 1px solid var(--line); }
.lead-pair p { color: var(--muted); font-size: 14px; }
.lead-pair p + p { margin-top: 23px; }
.lead-pair .lead { color: var(--ink); font-family: var(--serif); font-size: 20px; line-height: 1.85; }
.lead-pair [lang="en"] .lead { font-family: Georgia, serif; font-size: 18px; line-height: 1.65; }
.interest-row { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 48px; border-block: 1px solid var(--line); }
.interest-row > div { padding: 22px 16px; }
.interest-row > div + div { border-left: 1px solid var(--line); }
.interest-row span { display: block; font-family: var(--serif); font-size: 18px; }
.interest-row small { display: block; margin-top: 5px; color: var(--muted); font-size: 10px; line-height: 1.4; }
.credentials { margin-top: 43px; }
.credentials h3 { display: flex; align-items: baseline; justify-content: space-between; gap: 20px; padding-bottom: 13px; border-bottom: 2px solid var(--navy); font-family: var(--serif); font-size: 17px; font-weight: 500; }
.credentials h3 span:last-child { color: var(--muted); font: 12px/1.4 var(--sans); }
.credentials li { display: flex; align-items: baseline; justify-content: space-between; gap: 20px; padding: 12px 0; border-bottom: 1px solid var(--line); font-size: 13px; }
.credentials li small { max-width: 54%; color: var(--muted); font-size: 11px; text-align: right; line-height: 1.45; }

.teaching { background: var(--warm); }
.principles-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border-top: 1px solid var(--navy); border-left: 1px solid var(--line); }
.principle-card { position: relative; min-height: 270px; padding: 38px; background: var(--paper); border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.principle-card > svg { width: 34px; height: 34px; margin-bottom: 27px; fill: none; stroke: var(--gold); stroke-width: 1.25; stroke-linecap: round; stroke-linejoin: round; }
.principle-card .bilingual-pair { gap: 26px; }
.principle-card .bilingual-pair > div + div { padding-left: 24px; border-left: 1px solid var(--line); }
.principle-card h3 { font-family: var(--serif); font-size: 20px; font-weight: 500; }
.principle-card [lang="en"] h3 { font-family: Georgia, serif; font-size: 18px; }
.principle-card p { margin-top: 14px; color: var(--muted); font-size: 13px; }
.teaching-contexts { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 40px; background: var(--navy); color: #fff; }
.teaching-contexts > div { padding: 28px 30px; }
.teaching-contexts > div + div { border-left: 1px solid var(--white-line); }
.teaching-contexts span { display: block; font-family: var(--serif); font-size: 16px; }
.teaching-contexts small { display: block; margin-top: 6px; color: var(--gold-light); font-size: 10px; line-height: 1.45; }

.administration { color: #fff; background: var(--navy); }
.dark-heading h2 span:last-child, .administration .heading-note { color: rgba(255,255,255,.67); }
.administration .heading-note, .administration .heading-note p + p { border-color: var(--white-line); }
.role-feature { display: grid; grid-template-columns: minmax(230px, .65fr) minmax(0, 1.55fr); gap: 60px; padding: 42px 0; border-block: 1px solid var(--gold); }
.role-meta time { display: block; color: var(--gold-light); font: 22px/1.2 Georgia, serif; }
.role-meta p { margin-top: 20px; font-size: 13px; }
.role-meta p:last-child { margin-top: 8px; color: rgba(255,255,255,.55); font-size: 11px; }
.role-title { gap: 45px; }
.role-title > div + div { padding-left: 35px; border-left: 1px solid var(--white-line); }
.role-title h3 { font-family: var(--serif); font-size: 25px; font-weight: 500; line-height: 1.45; }
.role-title [lang="en"] h3 { font-family: Georgia, serif; font-size: 22px; }
.role-title p { margin-top: 17px; color: rgba(255,255,255,.65); font-size: 13px; }
.admin-capabilities { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 46px; }
.admin-capabilities > article { padding: 0 28px; }
.admin-capabilities > article:first-child { padding-left: 0; }
.admin-capabilities > article + article { border-left: 1px solid var(--white-line); }
.admin-capabilities h3 span { display: block; font-family: var(--serif); font-size: 18px; font-weight: 500; }
.admin-capabilities h3 span:last-child { margin-top: 6px; color: var(--gold-light); font: 11px/1.4 var(--sans); }
.admin-capabilities .bilingual-pair { grid-template-columns: 1fr; gap: 12px; margin-top: 20px; color: rgba(255,255,255,.58); font-size: 12px; }

.research { background: var(--paper); }
.research-directions { display: grid; grid-template-columns: repeat(3, 1fr); border-block: 1px solid var(--line); }
.research-directions article { position: relative; min-height: 190px; padding: 37px 30px; overflow: hidden; }
.research-directions article + article { border-left: 1px solid var(--line); }
.research-letter { position: absolute; right: 15px; bottom: -37px; color: rgba(0,33,71,.055); font: 170px/1 Georgia, serif; }
.research-directions h3 { position: relative; font-family: var(--serif); font-size: 27px; font-weight: 500; }
.research-directions p { position: relative; margin-top: 15px; color: var(--muted); font: 15px/1.45 Georgia, serif; }
.project-feature { display: grid; grid-template-columns: 170px minmax(0, 1fr) 150px; gap: 35px; align-items: center; margin-top: 55px; padding: 35px; color: #fff; background: var(--navy); }
.project-label span { display: block; color: var(--gold-light); font-size: 12px; }
.project-label span + span { margin-top: 7px; font-size: 10px; }
.project-body { gap: 28px; }
.project-body > div + div { padding-left: 26px; border-left: 1px solid var(--white-line); }
.project-body h3 { font-family: var(--serif); font-size: 20px; font-weight: 500; line-height: 1.55; }
.project-body [lang="en"] h3 { font-family: Georgia, serif; font-size: 17px; }
.project-body p { margin-top: 12px; color: rgba(255,255,255,.58); font-size: 11px; }
.project-number { padding-left: 24px; border-left: 1px solid var(--gold); }
.project-number small { display: block; color: var(--gold-light); font-size: 9px; }
.project-number strong { display: block; margin-top: 6px; font: 16px/1.3 Georgia, serif; font-weight: 400; }

.experience { background: var(--warm); }
.experience-layout { display: grid; grid-template-columns: minmax(300px, .8fr) minmax(0, 1.35fr); gap: 72px; align-items: start; }
.column-title { display: flex; align-items: baseline; justify-content: space-between; gap: 15px; padding-bottom: 18px; border-bottom: 3px solid var(--navy); font-family: var(--serif); font-size: 19px; font-weight: 500; }
.column-title span:last-child { max-width: 50%; color: var(--muted); font: 10px/1.4 var(--sans); text-align: right; }
.timeline-item { padding: 27px 0 30px; border-bottom: 1px solid var(--line); }
.timeline-item time { display: block; margin-bottom: 15px; color: var(--navy-soft); font: 13px/1.3 Georgia, serif; letter-spacing: .05em; }
.timeline-item .bilingual-pair { gap: 24px; }
.timeline-item .bilingual-pair > div + div { padding-left: 22px; border-left: 1px solid var(--line); }
.timeline-item h4 { font-family: var(--serif); font-size: 17px; font-weight: 500; line-height: 1.55; }
.timeline-item [lang="en"] h4 { font-family: Georgia, serif; font-size: 14px; }
.timeline-item p { margin-top: 8px; color: var(--muted); font-size: 12px; }
.timeline-item [lang="en"] p { font-size: 11px; }

.publications { background: var(--paper); }
.publication-list { border-top: 3px solid var(--navy); }
.publication-item { display: grid; grid-template-columns: 70px minmax(0, 1fr) 140px; gap: 28px; align-items: start; padding: 31px 0; border-bottom: 1px solid var(--line); }
.publication-item > time { padding-top: 4px; color: var(--navy); font: 21px/1.2 Georgia, serif; }
.publication-item .bilingual-pair { gap: 30px; }
.publication-item .bilingual-pair > div + div { padding-left: 28px; border-left: 1px solid var(--line); }
.publication-item h3 { font-family: var(--serif); font-size: 18px; font-weight: 500; line-height: 1.55; }
.publication-item [lang="en"] h3 { font-family: Georgia, serif; font-size: 15px; }
.publication-item p { margin-top: 8px; color: var(--muted); font-size: 11px; }
.publication-tag { justify-self: end; padding-top: 4px; color: var(--navy-soft); font-size: 10px; text-align: right; }
.mentoring-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 30px; margin-top: 55px; }
.mentoring-grid > article { padding: 32px; border: 1px solid var(--line); border-top: 4px solid var(--gold); }
.mentoring-year { color: var(--navy-soft); font: 12px/1.3 Georgia, serif; letter-spacing: .07em; }
.mentoring-grid .bilingual-pair { gap: 26px; margin-top: 23px; }
.mentoring-grid .bilingual-pair > div + div { padding-left: 24px; border-left: 1px solid var(--line); }
.mentoring-grid h3 { font-family: var(--serif); font-size: 17px; font-weight: 500; line-height: 1.6; }
.mentoring-grid [lang="en"] h3 { font-family: Georgia, serif; font-size: 14px; }
.mentoring-grid .bilingual-pair p { margin-top: 13px; color: var(--muted); font-size: 12px; }

.contact { padding: 110px 0 28px; color: #fff; background: var(--navy-deep); }
.contact-grid { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(250px, .55fr); gap: 90px; align-items: end; }
.contact h2 { margin-top: 24px; font-family: var(--serif); font-weight: 500; }
.contact h2 span { display: block; }
.contact h2 span:first-child { font-size: clamp(38px, 4.5vw, 66px); }
.contact h2 span:last-child { max-width: 780px; margin-top: 14px; color: var(--gold-light); font: 400 clamp(22px, 2.6vw, 36px)/1.3 Georgia, serif; }
.contact-copy { max-width: 900px; margin-top: 35px; padding-top: 25px; border-top: 1px solid var(--white-line); color: rgba(255,255,255,.66); font-size: 14px; }
.contact-copy p + p { padding-left: 30px; border-left: 1px solid var(--white-line); }
.contact-actions { display: flex; align-items: stretch; flex-wrap: wrap; gap: 16px; margin-top: 37px; }
.email-link { display: inline-flex; align-items: center; min-height: 56px; padding: 10px 22px; color: var(--navy); background: var(--gold-light); font: 18px/1.3 Georgia, serif; overflow-wrap: anywhere; }
.email-link:hover { background: #f0dbaf; }
.copy-button { min-height: 56px; padding: 9px 21px; color: #fff; background: transparent; border: 1px solid rgba(255,255,255,.35); cursor: pointer; }
.copy-button:hover { border-color: var(--gold-light); color: var(--gold-light); }
.copy-button span, .copy-button small { display: block; line-height: 1.25; }
.copy-button span { font-size: 13px; }
.copy-button small { margin-top: 4px; font-size: 9px; }
.copy-status { min-height: 25px; margin-top: 10px; color: var(--gold-light); font-size: 12px; }
.signature-block { padding-bottom: 8px; text-align: center; }
.signature-block img { width: 100%; height: auto; max-height: 160px; object-fit: contain; }
.signature-block p { display: flex; justify-content: center; gap: 13px; margin-top: 16px; color: rgba(255,255,255,.58); font-size: 11px; }
.signature-block p span + span { padding-left: 13px; border-left: 1px solid var(--white-line); }
.footer-line { display: flex; align-items: center; justify-content: space-between; gap: 25px; margin-top: 80px; padding-top: 23px; border-top: 1px solid var(--white-line); color: rgba(255,255,255,.42); font-size: 10px; }
.footer-line p:nth-child(2) { display: flex; gap: 10px; }
.footer-line a { min-height: 44px; display: inline-flex; align-items: center; color: var(--gold-light); }

.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.reveal.is-visible { opacity: 1; transform: none; }

@media (max-width: 1180px) {
  .container { width: min(var(--container), calc(100% - 64px)); }
  .site-nav a { min-width: 58px; padding-inline: 8px; }
  .site-nav .nav-contact { margin-left: 6px; padding-inline: 14px; }
  .hero-grid { gap: 45px; grid-template-columns: minmax(0, 1.35fr) minmax(310px, .8fr); }
  .hero h1 span:first-child { font-size: 72px; }
  .hero h1 span:last-child { font-size: 37px; }
  .about-grid { gap: 48px; }
  .split-heading { gap: 45px; }
  .principle-card { padding: 30px; }
  .experience-layout { gap: 45px; }
  .project-feature { grid-template-columns: 135px minmax(0,1fr); }
  .project-number { grid-column: 2; padding: 15px 0 0; border-left: 0; border-top: 1px solid var(--white-line); }
}

@media (max-width: 1020px) {
  :root { --header-height: 72px; }
  .menu-toggle { display: flex; }
  .site-nav { position: fixed; top: var(--header-height); right: 0; left: 0; display: grid; grid-template-columns: repeat(2, 1fr); max-height: calc(100svh - var(--header-height)); padding: 18px 32px 30px; color: var(--navy); background: var(--warm); border-bottom: 1px solid var(--line); overflow-y: auto; visibility: hidden; opacity: 0; transform: translateY(-10px); transition: opacity .2s ease, transform .2s ease, visibility .2s; }
  .site-nav.is-open { visibility: visible; opacity: 1; transform: none; }
  .site-nav a { min-height: 62px; align-items: flex-start; padding: 12px 15px; border-bottom: 1px solid var(--line); }
  .site-nav a::after { display: none; }
  .site-nav span { font-size: 15px; }
  .site-nav small { font-size: 10px; }
  .site-nav .nav-contact { margin: 16px 0 0; align-self: auto; align-items: center; }
  .hero { padding-top: 125px; }
  .hero-grid { grid-template-columns: minmax(0, 1.25fr) minmax(280px, .8fr); gap: 35px; }
  .hero h1 span:first-child { font-size: 61px; }
  .hero h1 span:last-child { font-size: 32px; }
  .hero-role { gap: 22px; }
  .hero-role h2, .hero-role [lang="en"] h2 { font-size: 17px; }
  .hero-role p { font-size: 12px; }
  .hero-facts { gap: 12px; }
  .hero-facts dd { font-size: 9px; }
  .scroll-cue { display: none; }
  .section { padding: 100px 0; }
  .about-grid { grid-template-columns: minmax(240px, .65fr) minmax(0, 1.4fr); gap: 36px; }
  .lead-pair { gap: 26px; }
  .lead-pair > div + div { padding-left: 24px; }
  .lead-pair .lead { font-size: 18px; }
  .lead-pair [lang="en"] .lead { font-size: 16px; }
  .interest-row { grid-template-columns: 1fr; }
  .interest-row > div + div { border-left: 0; border-top: 1px solid var(--line); }
  .principle-card .bilingual-pair { grid-template-columns: 1fr; }
  .principle-card .bilingual-pair > div + div { padding: 18px 0 0; border-left: 0; border-top: 1px solid var(--line); }
  .role-feature { gap: 35px; }
  .experience-layout { grid-template-columns: 1fr; gap: 60px; }
  .publication-item { grid-template-columns: 55px minmax(0, 1fr); }
  .publication-tag { grid-column: 2; justify-self: start; padding: 0; text-align: left; }
}

@media (max-width: 800px) {
  .container { width: calc(100% - 40px); }
  .header-inner { width: calc(100% - 36px); }
  .hero { min-height: auto; padding: 122px 0 80px; }
  .hero::before { font-size: 85vw; bottom: -20vw; }
  .hero-rule { display: none; }
  .hero-grid { grid-template-columns: 1fr; gap: 60px; }
  .hero h1 span:first-child { font-size: clamp(54px, 15vw, 76px); }
  .hero h1 span:last-child { font-size: clamp(29px, 8vw, 40px); }
  .hero-role { gap: 28px; }
  .hero-role h2, .hero-role [lang="en"] h2 { font-size: 20px; }
  .hero-role p { font-size: 14px; }
  .hero-portrait { width: min(88%, 520px); margin-inline: auto; }
  .hero-actions { margin-top: 30px; }
  .section { padding: 82px 0; }
  .section-heading { margin-bottom: 45px; }
  .split-heading { grid-template-columns: 1fr; gap: 30px; }
  .heading-note { max-width: none; }
  .about-grid { grid-template-columns: 1fr; gap: 45px; }
  .about-portrait { position: static; width: min(82%, 480px); }
  .interest-row { grid-template-columns: repeat(3, 1fr); }
  .interest-row > div + div { border-top: 0; border-left: 1px solid var(--line); }
  .principle-card .bilingual-pair { grid-template-columns: minmax(0,1fr) minmax(0,1fr); }
  .principle-card .bilingual-pair > div + div { padding: 0 0 0 20px; border-top: 0; border-left: 1px solid var(--line); }
  .teaching-contexts { grid-template-columns: 1fr; }
  .teaching-contexts > div + div { border-left: 0; border-top: 1px solid var(--white-line); }
  .role-feature { grid-template-columns: 1fr; gap: 30px; }
  .role-meta { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 25px; }
  .role-meta time { grid-column: 1 / -1; }
  .role-meta p { margin-top: 8px; }
  .role-meta p:last-child { margin-top: 8px; }
  .admin-capabilities { grid-template-columns: 1fr; gap: 0; }
  .admin-capabilities > article { padding: 28px 0; }
  .admin-capabilities > article + article { border-left: 0; border-top: 1px solid var(--white-line); }
  .admin-capabilities .bilingual-pair { grid-template-columns: minmax(0,1fr) minmax(0,1fr); }
  .research-directions { grid-template-columns: 1fr; }
  .research-directions article { min-height: 135px; padding: 28px; }
  .research-directions article + article { border-left: 0; border-top: 1px solid var(--line); }
  .research-letter { font-size: 135px; }
  .project-feature { grid-template-columns: 1fr; gap: 25px; }
  .project-number { grid-column: 1; }
  .project-label { padding-bottom: 15px; border-bottom: 1px solid var(--gold); }
  .mentoring-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; gap: 50px; }
  .signature-block { width: min(70%, 360px); }
  .footer-line { align-items: flex-start; flex-wrap: wrap; }
}

@media (max-width: 600px) {
  .container { width: calc(100% - 36px); }
  .brand-name strong { font-size: 15px; }
  .brand-mark { width: 38px; height: 38px; }
  .site-nav { padding-inline: 18px; }
  .hero { padding-top: 112px; }
  .hero h1 { margin-top: 22px; }
  .hero h1 span:first-child { font-size: 58px; }
  .hero h1 span:last-child { margin-top: 15px; font-size: 32px; }
  .hero-role { margin-top: 32px; padding-top: 23px; }
  .hero-role h2, .hero-role [lang="en"] h2 { font-size: 18px; }
  .hero-actions { display: grid; grid-template-columns: 1fr 1fr; }
  .button { padding-inline: 15px; }
  .hero-facts { gap: 10px; }
  .hero-facts dt { font-size: 13px; }
  .hero-facts dd { font-size: 8px; }
  .hero-portrait { width: 92%; }
  .section-heading h2 span:first-child { font-size: 33px; }
  .section-heading h2 span:last-child { font-size: 20px; }
  .heading-note { font-size: 13px; }
  .about-portrait { width: 92%; }
  .lead-pair .lead { font-size: 18px; }
  .lead-pair [lang="en"] .lead { font-size: 16px; }
  .interest-row { grid-template-columns: 1fr; }
  .interest-row > div + div { border-left: 0; border-top: 1px solid var(--line); }
  .credentials h3 { align-items: flex-start; flex-direction: column; gap: 5px; }
  .credentials li { align-items: flex-start; flex-direction: column; gap: 5px; }
  .credentials li small { max-width: none; text-align: left; }
  .principles-grid { grid-template-columns: 1fr; }
  .principle-card { min-height: 0; padding: 28px 24px; }
  .role-title h3 { font-size: 22px; }
  .role-title [lang="en"] h3 { font-size: 19px; }
  .role-meta { grid-template-columns: 1fr; }
  .role-meta time { grid-column: 1; }
  .research-directions h3 { font-size: 24px; }
  .project-feature { padding: 26px 22px; }
  .column-title { align-items: flex-start; flex-direction: column; gap: 5px; }
  .column-title span:last-child { max-width: none; text-align: left; }
  .timeline-item .bilingual-pair { gap: 18px; }
  .timeline-item .bilingual-pair > div + div { padding-left: 17px; }
  .publication-item { grid-template-columns: 1fr; gap: 12px; }
  .publication-tag { grid-column: 1; }
  .publication-item > time { font-size: 17px; }
  .mentoring-grid > article { padding: 26px 22px; }
  .contact { padding-top: 82px; }
  .contact h2 span:first-child { font-size: 40px; }
  .contact h2 span:last-child { font-size: 24px; }
  .contact-actions { align-items: stretch; flex-direction: column; }
  .email-link { justify-content: center; font-size: 17px; }
  .copy-button { width: 100%; }
  .signature-block { width: 80%; }
  .footer-line { flex-direction: column; gap: 12px; }
  .footer-line p:nth-child(2) { flex-direction: column; gap: 2px; }
}

@media (max-width: 760px) {
  .bilingual-pair { grid-template-columns: 1fr; gap: 22px; }
  .hero-role > div + div,
  .heading-note p + p,
  .lead-pair > div + div,
  .principle-card .bilingual-pair > div + div,
  .role-title > div + div,
  .project-body > div + div,
  .timeline-item .bilingual-pair > div + div,
  .publication-item .bilingual-pair > div + div,
  .mentoring-grid .bilingual-pair > div + div,
  .contact-copy p + p { padding: 20px 0 0; border-left: 0; border-top: 1px solid var(--line); }
  .hero-role > div + div, .role-title > div + div, .project-body > div + div, .contact-copy p + p { border-top-color: var(--white-line); }
  .heading-note { display: grid; }
  .principle-card .bilingual-pair { grid-template-columns: 1fr; }
  .admin-capabilities .bilingual-pair { grid-template-columns: 1fr; }
}

@media (max-width: 380px) {
  .hero h1 span:first-child { font-size: 50px; }
  .hero h1 span:last-child { font-size: 28px; }
  .hero-actions { grid-template-columns: 1fr; }
  .hero-facts { grid-template-columns: 1fr; }
  .hero-facts > div { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; }
  .hero-facts dd { text-align: right; }
}

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

.error-page { color: #fff; background: var(--navy); }
.error-main { min-height: 100svh; display: grid; place-items: center; padding: 40px 20px; }
.error-card { width: min(720px, 100%); }
.error-card .brand { margin-bottom: 55px; }
.error-code { color: var(--gold-light); font: clamp(90px, 18vw, 180px)/.9 Georgia, serif; }
.error-card h1 { margin-top: 35px; font-family: var(--serif); font-weight: 500; }
.error-card h1 span { display: block; font-size: clamp(28px, 5vw, 46px); }
.error-card h1 span:last-child { margin-top: 8px; color: var(--gold-light); font: 400 clamp(19px, 3vw, 28px)/1.4 Georgia, serif; }
.error-card > p:not(.error-code) { max-width: 580px; margin: 28px 0 32px; color: rgba(255,255,255,.68); }
.error-card > p span { display: block; }
.error-card .button { display: inline-flex; }

@media print {
  :root { --header-height: 0px; }
  body { color: #000; background: #fff; font-size: 10pt; }
  .site-header, .hero-actions, .scroll-cue, .contact-actions, .copy-status, .footer-line a { display: none !important; }
  .hero, .administration, .contact { color: #000; background: #fff; }
  .hero { min-height: auto; padding: 40px 0; }
  .hero::before, .hero-rule { display: none; }
  .hero-grid, .about-grid, .experience-layout, .contact-grid { grid-template-columns: 1fr; }
  .hero-portrait, .about-portrait { max-width: 260px; }
  .hero-role p, .hero-facts dd, .section-heading h2 span:last-child, .role-title p, .contact-copy, .contact h2 span:last-child { color: #333; }
  .section { padding: 35px 0; break-inside: auto; }
  .section-heading { margin-bottom: 25px; }
  .principle-card, .timeline-item, .publication-item, .mentoring-grid > article, .project-feature { break-inside: avoid; }
  .project-feature, .teaching-contexts { color: #000; background: #eee; }
  .reveal { opacity: 1; transform: none; }
}