:root {
  --ink: #202124;
  --muted: #62666d;
  --blue: #174f8a;
  --line: #e3e5e8;
  --soft: #f7f8f9;
  --max: 980px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 74px; }
body {
  margin: 0;
  color: var(--ink);
  background: #fff;
  font-family: Inter, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  text-rendering: optimizeLegibility;
}
a { color: var(--blue); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: #0b6cab; }
img { display: block; max-width: 100%; }

.skip-link { position: fixed; left: 12px; top: -60px; z-index: 1000; padding: 8px 12px; color: #fff; background: var(--blue); }
.skip-link:focus { top: 12px; }

.site-header { position: sticky; top: 0; z-index: 100; background: rgba(255,255,255,.96); border-bottom: 1px solid var(--line); }
.nav-wrap { width: min(calc(100% - 40px), var(--max)); min-height: 64px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; white-space: nowrap; }
.brand-mark { display: grid; place-items: center; width: 30px; height: 30px; border: 1px solid var(--ink); border-radius: 50%; font-family: Georgia, serif; font-size: 13px; font-weight: 700; }
.brand-name { font-size: 15px; font-weight: 650; }
.nav-links { display: flex; align-items: center; gap: 20px; }
.nav-links a { color: #4e535a; font-size: 13px; text-decoration: none; }
.nav-links a:hover { color: var(--blue); }
.language-link { padding-left: 18px; border-left: 1px solid var(--line); color: var(--blue) !important; }
.nav-toggle { display: none; width: 38px; height: 38px; padding: 0; color: var(--ink); background: #fff; border: 1px solid var(--line); border-radius: 4px; font-size: 20px; }

.hero { background: #fff; }
.hero-inner { width: min(calc(100% - 40px), var(--max)); margin: 0 auto; padding: 82px 0 72px; display: grid; grid-template-columns: minmax(0,1fr) 210px; align-items: start; gap: 72px; }
.eyebrow, .section-kicker { margin: 0 0 9px; color: var(--blue); font-size: 12px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; }
.hero h1 { margin: 0; font-family: Georgia, "Noto Serif SC", "Songti SC", serif; font-size: clamp(40px, 6vw, 58px); font-weight: 500; line-height: 1.18; letter-spacing: -.02em; }
.hero-role { margin: 14px 0 0; color: var(--ink); font-size: 18px; line-height: 1.65; }
.hero-copy { max-width: 660px; margin: 24px 0 0; color: var(--muted); font-size: 16px; }
.hero-actions { margin-top: 24px; display: flex; flex-wrap: wrap; gap: 12px 24px; }
.button { display: inline; min-height: 0; padding: 0; color: var(--blue); background: transparent; border: 0; border-radius: 0; font-size: 14px; font-weight: 600; text-decoration: underline; text-underline-offset: 4px; }
.button:hover { color: #0b6cab; transform: none; background: transparent; }
.portrait-wrap { position: relative; width: 100%; max-width: 210px; min-width: 0; justify-self: end; }
.portrait-frame { padding: 0; background: none; border: 0; border-radius: 3px; box-shadow: none; transform: none; }
.portrait-frame img { width: 100%; height: auto; aspect-ratio: 1 / 1; object-fit: cover; border-radius: 3px; }
.portrait-note { display: none; }
.fact-bar { display: none; }

.section { padding: 70px 0; border-top: 1px solid var(--line); }
.section-alt { background: #fff; }
.container { width: min(calc(100% - 40px), var(--max)); margin: 0 auto; }
.section-heading { display: grid; grid-template-columns: 210px minmax(0,1fr); gap: 72px; align-items: start; margin-bottom: 42px; }
.section h2 { margin: 0; font-family: Georgia, "Noto Serif SC", "Songti SC", serif; font-size: clamp(28px,4vw,37px); font-weight: 500; line-height: 1.3; }
.section-intro { margin: 1px 0 0; color: var(--muted); }

.research-grid { display: grid; grid-template-columns: 1fr; gap: 0; border-top: 1px solid var(--line); }
.research-card { display: grid; grid-template-columns: 60px minmax(0,1fr); overflow: visible; background: #fff; border: 0; border-bottom: 1px solid var(--line); border-radius: 0; box-shadow: none; }
.research-image { display: none; }
.research-body { display: contents; }
.card-number { padding: 23px 0; color: #92979d; font-family: Georgia, serif; font-size: 14px; letter-spacing: .06em; }
.research-card h3 { margin: 0; padding: 20px 0 3px; color: var(--ink); font-size: 19px; font-weight: 600; line-height: 1.45; }
.research-card p { grid-column: 2; margin: -3px 0 22px; color: var(--muted); font-size: 15px; }

.impact { margin-top: 38px; padding: 28px 0 0; display: grid; grid-template-columns: 1fr 260px; gap: 48px; color: var(--ink); background: #fff; border-top: 2px solid var(--ink); border-radius: 0; }
.impact h3 { margin: 0 0 7px; font-size: 20px; }
.impact p { margin: 0; color: var(--muted); }
.impact-metrics { display: grid; grid-template-columns: repeat(2,1fr); gap: 18px; }
.impact-metrics div { padding: 0; background: none; border: 0; border-radius: 0; }
.impact-metrics strong, .impact-metrics span { display: block; }
.impact-metrics strong { color: var(--blue); font-family: Georgia, serif; font-size: 29px; font-weight: 500; }
.impact-metrics span { color: var(--muted); font-size: 12px; line-height: 1.5; }

.publication-list { border-top: 1px solid var(--line); }
.publication { padding: 23px 0; display: grid; grid-template-columns: 70px minmax(0,1fr) 60px; gap: 22px; align-items: start; border-bottom: 1px solid var(--line); }
.publication-year { color: var(--muted); font-family: Georgia, serif; font-size: 16px; }
.publication h3 { margin: 0 0 5px; font-size: 16px; font-weight: 600; line-height: 1.5; }
.publication p { margin: 0; color: var(--muted); font-size: 13px; }
.publication-link { justify-self: end; font-size: 13px; font-weight: 600; }

.profile-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 64px; }
.panel { padding: 0; background: #fff; border: 0; border-radius: 0; }
.panel h3 { margin: 0 0 22px; color: var(--ink); font-size: 18px; }
.timeline, .award-list { margin: 0; padding: 0; list-style: none; }
.timeline li { position: relative; padding: 0 0 20px 0; }
.timeline li::before, .timeline li::after { display: none; }
.timeline time, .timeline strong, .timeline span, .award-list strong, .award-list span { display: block; }
.timeline time { color: var(--muted); font-size: 12px; }
.timeline strong { margin-top: 2px; font-weight: 600; }
.timeline span, .award-list span { color: var(--muted); font-size: 13px; }
.award-list li { padding: 0 0 18px; border: 0; }
.award-list li:first-child { padding-top: 0; }

.recruitment { overflow: visible; position: static; padding: 38px 42px; color: var(--ink); background: var(--soft); border-left: 3px solid var(--blue); border-radius: 0; }
.recruitment::after { display: none; }
.recruitment h2 { max-width: 720px; }
.recruitment p { max-width: 820px; color: var(--muted); }
.research-tags { margin: 20px 0 24px; display: flex; flex-wrap: wrap; gap: 7px 18px; }
.research-tags span { padding: 0; color: var(--muted); border: 0; border-radius: 0; font-size: 13px; }
.research-tags span::before { content: "· "; color: var(--blue); }

.contact-grid { display: grid; grid-template-columns: 210px minmax(0,1fr); gap: 72px; align-items: start; }
.contact-links { display: grid; gap: 0; border-top: 1px solid var(--line); }
.contact-link { padding: 15px 0; display: flex; align-items: center; justify-content: space-between; gap: 16px; color: var(--ink); background: #fff; border: 0; border-bottom: 1px solid var(--line); border-radius: 0; text-decoration: none; }
.contact-link:hover { color: var(--blue); border-color: var(--line); }
.contact-note { color: var(--muted); }

.site-footer { padding: 34px 0; color: var(--muted); background: #fff; border-top: 1px solid var(--line); font-size: 12px; }
.footer-inner { width: min(calc(100% - 40px), var(--max)); margin: 0 auto; display: flex; flex-direction: column; justify-content: center; gap: 8px; align-items: center; text-align: center; }
.site-footer a { color: var(--muted); }
.footer-meta { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px 20px; }

@media (max-width: 760px) {
  .nav-toggle { display: block; }
  .nav-links { display: none; position: absolute; top: 64px; left: 0; right: 0; padding: 18px 20px; flex-direction: column; align-items: stretch; gap: 16px; background: #fff; border-bottom: 1px solid var(--line); }
  .nav-links.is-open { display: flex; }
  .language-link { padding: 10px 0 0; border-left: 0; border-top: 1px solid var(--line); }
  .hero-inner { padding: 56px 0; grid-template-columns: 1fr 135px; gap: 34px; }
  .portrait-wrap { max-width: 135px; }
  .section-heading, .contact-grid { grid-template-columns: 1fr; gap: 12px; }
  .profile-grid { grid-template-columns: 1fr; gap: 42px; }
  .impact { grid-template-columns: 1fr; gap: 24px; }
}

@media (max-width: 520px) {
  .nav-wrap, .hero-inner, .container, .footer-inner { width: min(calc(100% - 30px), var(--max)); }
  .brand-name { font-size: 14px; }
  .hero-inner { grid-template-columns: 1fr; gap: 30px; padding: 50px 0; }
  .hero h1 { font-size: 42px; }
  .portrait-wrap { max-width: 155px; justify-self: start; order: -1; }
  .section { padding: 56px 0; }
  .publication { grid-template-columns: 52px minmax(0,1fr); gap: 14px; }
  .publication-link { grid-column: 2; justify-self: start; }
  .recruitment { padding: 28px 24px; }
  .footer-inner { align-items: center; }
  .footer-meta { justify-content: center; }
}

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

/* Multi-page academic content */
.nav-links a[aria-current="page"] { color: var(--blue); font-weight: 650; }
.page-header { padding: 68px 0 52px; border-bottom: 1px solid var(--line); }
.page-header-inner { width: min(calc(100% - 40px), var(--max)); margin: 0 auto; }
.page-title { max-width: 760px; margin: 0; font-family: Georgia, "Noto Serif SC", "Songti SC", serif; font-size: clamp(38px, 6vw, 55px); font-weight: 500; line-height: 1.2; letter-spacing: -.02em; }
.page-lead { max-width: 760px; margin: 20px 0 0; color: var(--muted); font-size: 17px; }
.page-body { width: min(calc(100% - 40px), var(--max)); margin: 0 auto; padding: 64px 0 88px; }
.page-section + .page-section { margin-top: 74px; padding-top: 64px; border-top: 1px solid var(--line); }
.page-section-title { margin: 0 0 26px; font-family: Georgia, "Noto Serif SC", "Songti SC", serif; font-size: 31px; font-weight: 500; line-height: 1.3; }
.prose { max-width: 760px; }
.prose p { margin: 0 0 18px; }
.prose h2 { margin: 48px 0 16px; font-family: Georgia, "Noto Serif SC", "Songti SC", serif; font-size: 28px; font-weight: 500; }
.prose h3 { margin: 34px 0 12px; font-size: 19px; }
.prose ul, .prose ol { padding-left: 1.25em; }
.prose li { margin: 8px 0; }
.meta-line { margin: 0 0 18px; color: var(--muted); font-size: 13px; }
.text-link { font-size: 14px; font-weight: 600; }

.home-block { padding: 62px 0; border-top: 1px solid var(--line); }
.home-block-inner { width: min(calc(100% - 40px), var(--max)); margin: 0 auto; display: grid; grid-template-columns: 210px minmax(0, 1fr); gap: 72px; }
.home-block-title { margin: 0; font-family: Georgia, "Noto Serif SC", "Songti SC", serif; font-size: 29px; font-weight: 500; }
.summary-list { border-top: 1px solid var(--line); }
.summary-item { padding: 20px 0; display: grid; grid-template-columns: 92px minmax(0,1fr); gap: 18px; border-bottom: 1px solid var(--line); }
.summary-item time, .summary-label { color: var(--muted); font-size: 12px; }
.summary-item h3 { margin: 0 0 4px; font-size: 16px; font-weight: 600; line-height: 1.45; }
.summary-item p { margin: 0; color: var(--muted); font-size: 14px; }
.home-more { margin: 20px 0 0; }

.research-detail { display: grid; grid-template-columns: minmax(0, 1.08fr) minmax(280px, .92fr); gap: 52px; align-items: start; }
.research-detail + .research-detail { margin-top: 72px; padding-top: 64px; border-top: 1px solid var(--line); }
.research-detail:nth-child(even) .research-media { order: -1; }
.research-index { color: var(--blue); font-family: Georgia, serif; font-size: 15px; }
.research-detail h2 { margin: 8px 0 17px; font-family: Georgia, "Noto Serif SC", "Songti SC", serif; font-size: 30px; font-weight: 500; line-height: 1.3; }
.research-detail p { margin: 0 0 16px; }
.research-detail ul { padding-left: 1.2em; }
.research-detail li { margin: 7px 0; }
.research-media { display: grid; gap: 14px; }
.research-media figure { margin: 0; }
.research-media img { width: 100%; height: auto; border: 1px solid var(--line); }
.research-media figcaption { margin-top: 7px; color: var(--muted); font-size: 12px; }
.related { margin-top: 20px; padding-top: 17px; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }

.filter-note { margin: 0 0 28px; color: var(--muted); font-size: 14px; }
.publication-full-list { border-top: 1px solid var(--line); }
.publication-full { padding: 24px 0; display: grid; grid-template-columns: 66px minmax(0,1fr); gap: 22px; border-bottom: 1px solid var(--line); }
.publication-full .year { color: var(--muted); font-family: Georgia, serif; }
.publication-full h2 { margin: 0 0 6px; font-size: 16px; font-weight: 600; line-height: 1.5; }
.publication-full p { margin: 0; color: var(--muted); font-size: 13px; }
.publication-full .links { margin-top: 7px; display: flex; flex-wrap: wrap; gap: 14px; font-size: 12px; font-weight: 600; }
.author-self { color: var(--ink); font-weight: 650; }

.timeline-group { display: grid; grid-template-columns: 92px minmax(0,1fr); gap: 28px; }
.timeline-group + .timeline-group { margin-top: 52px; }
.timeline-year { margin: 0; color: var(--blue); font-family: Georgia, serif; font-size: 25px; font-weight: 500; }
.news-items { border-top: 1px solid var(--line); }
.news-item { padding: 20px 0; display: grid; grid-template-columns: 62px minmax(0,1fr); gap: 20px; border-bottom: 1px solid var(--line); }
.news-date { color: var(--muted); font-size: 12px; }
.news-item h2 { margin: 0 0 5px; font-size: 16px; font-weight: 600; line-height: 1.45; }
.news-item p { margin: 0; color: var(--muted); font-size: 14px; }
.archive-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 22px; }
.archive-card { padding: 25px; border: 1px solid var(--line); }
.archive-card .summary-label { display: block; margin-bottom: 10px; }
.archive-card h3 { margin: 0 0 9px; font-size: 17px; }
.archive-card p { margin: 0 0 14px; color: var(--muted); font-size: 14px; }

.two-column { display: grid; grid-template-columns: repeat(2,1fr); gap: 64px; }
.plain-list { margin: 0; padding: 0; list-style: none; }
.plain-list li { padding: 0 0 20px; }
.plain-list strong, .plain-list span { display: block; }
.plain-list span { color: var(--muted); font-size: 13px; }
.callout { margin: 34px 0; padding: 25px 28px; background: var(--soft); border-left: 3px solid var(--blue); }
.callout p:first-child { margin-top: 0; }
.callout p:last-child { margin-bottom: 0; }

@media (max-width: 760px) {
  .home-block-inner, .research-detail, .two-column { grid-template-columns: 1fr; gap: 28px; }
  .research-detail:nth-child(even) .research-media { order: initial; }
  .timeline-group { grid-template-columns: 1fr; gap: 10px; }
  .archive-grid { grid-template-columns: 1fr; }
}

@media (max-width: 520px) {
  .page-header-inner, .page-body, .home-block-inner { width: min(calc(100% - 30px), var(--max)); }
  .page-header { padding: 48px 0 40px; }
  .page-body { padding: 48px 0 68px; }
  .summary-item { grid-template-columns: 70px minmax(0,1fr); }
  .publication-full { grid-template-columns: 48px minmax(0,1fr); gap: 14px; }
  .news-item { grid-template-columns: 48px minmax(0,1fr); gap: 14px; }
}