/* Lightweight academic theme: system fonts and local assets. */
:root{--ink:#222b32;--muted:#57616a;--accent:#8b2635;--paper:#fff;--wash:#f6f4f1;--line:#dedbd6;--width:1120px}

*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:110px}
body{margin:0;color:var(--ink);background:var(--paper);font:17px/1.7 -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
a{color:var(--accent);text-underline-offset:.22em}
a:hover{text-decoration-thickness:2px}
a:focus-visible{outline:3px solid var(--accent);outline-offset:5px}
img{max-width:100%;height:auto}
h1,h2,h3,p,figure{margin:0}
h1,h2,h3{line-height:1.2;font-weight:600}
h1,h2{letter-spacing:-.035em}
h2{font-size:clamp(1.8rem,3.2vw,2.55rem)}
h3{font-size:1.18rem;letter-spacing:-.015em}
p+p{margin-top:1rem}
.skip-link{position:absolute;top:-100px;left:16px;background:#fff;padding:12px;z-index:10}
.skip-link:focus{top:10px}
.site-header{position:sticky;top:0;background:rgba(255,255,255,.98);border-top:4px solid var(--accent);border-bottom:1px solid var(--line);z-index:5}
.header-inner{max-width:var(--width);margin:auto;display:flex;align-items:center;justify-content:space-between;gap:32px;padding:19px 0}
.wordmark{color:var(--ink);font-size:1.15rem;font-weight:650;text-decoration:none;line-height:1.35;white-space:nowrap}
.wordmark span{display:block;color:var(--muted);font-size:.76rem;font-weight:400;letter-spacing:.04em}
nav{display:flex;flex-wrap:wrap;gap:8px 24px}
nav a{font-size:.88rem;font-weight:500;color:var(--ink);text-decoration:none;padding:8px 0}
nav a:hover,nav a[aria-current]{color:var(--accent);text-decoration:underline}
.home,.document{max-width:var(--width);margin:auto}
.hero{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:80px;padding:76px 0 70px;align-items:center}
.eyebrow{color:var(--accent);font-size:.75rem;font-weight:650;letter-spacing:.105em;text-transform:uppercase;margin-bottom:18px}
.hero h1{font-size:clamp(2.8rem,5vw,4.2rem);line-height:1.06}
.hero h1 span{display:block;font-size:.48em;font-weight:400;letter-spacing:-.02em;color:var(--muted);margin-top:12px}
.role{margin-top:24px!important;font-weight:600}
.hero-statement{font-size:clamp(1.35rem,2.3vw,1.72rem);line-height:1.4;letter-spacing:-.02em;margin-top:20px}
.hero-copy>p:not(.eyebrow):last-of-type{color:var(--muted);font-size:1rem}
.portrait img{width:280px;height:350px;object-fit:cover;border-radius:3px;background:var(--wash)}
figcaption{font-size:.76rem;color:var(--muted);margin-top:10px}
.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.button{display:inline-flex;align-items:center;gap:24px;background:var(--accent);color:#fff;padding:11px 20px;border:1px solid var(--accent);border-radius:3px;text-decoration:none;font-size:.88rem;font-weight:550}
.button:hover{background:#70202c}
.button.secondary{background:#fff;color:var(--ink);border-color:var(--line)}
.button.secondary:hover{border-color:var(--accent);color:var(--accent)}
.profile-links{display:flex;flex-wrap:wrap;gap:8px 22px;margin-top:22px;font-size:.84rem}
.profile-links a{color:var(--muted)}
.section{border-top:1px solid var(--line);padding:60px 0;scroll-margin-top:10px}
.section-heading{margin-bottom:26px}
.section-heading .eyebrow{margin-bottom:12px}
.heading-row{display:flex;justify-content:space-between;align-items:end;gap:24px}
.heading-row>a{font-size:.88rem;white-space:nowrap}
.section-intro{max-width:750px;color:var(--muted);margin-bottom:30px}
.research-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:36px;margin-top:36px}
.topic-number{color:var(--accent);font-size:.85rem;display:block;margin-bottom:16px}
.research-grid p{font-size:.95rem;color:var(--muted);margin-top:14px}
.keywords{border-left:3px solid var(--accent);padding:8px 0 8px 20px;margin-top:36px;font-size:.85rem;color:var(--muted)}
.keywords strong{display:block;color:var(--ink);margin-bottom:3px}
.project-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.project-card{background:var(--wash);border:1px solid var(--line);border-radius:4px;padding:28px;overflow:hidden}
.project-card--visual{padding:0}
.project-card-image{display:block;aspect-ratio:16/7;background:#ebe7e1;overflow:hidden}
.project-card-image img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
.project-card-image:hover img{transform:scale(1.02)}
.project-card-copy{padding:0}
.project-card--visual .project-card-copy{padding:28px}
.project-card .eyebrow{font-size:.68rem;margin-bottom:12px}
.project-card h3 a{color:var(--ink);text-decoration:none}
.project-card h3 a:hover{color:var(--accent);text-decoration:underline}
.project-card h3 span{color:var(--accent);margin-left:6px}
.project-card p:last-child{color:var(--muted);font-size:.92rem;margin-top:14px}
.publication-list{list-style:none;padding:0;margin:0}
.publication-list li{display:grid;grid-template-columns:70px minmax(0,1fr);gap:24px;border-bottom:1px solid var(--line);padding:26px 0}
.publication-list li:first-child{padding-top:0}
.publication-list li:last-child{border-bottom:0}
.publication-year{font-size:1.05rem;color:var(--accent);font-weight:600}
.publication-type{font-size:.72rem;color:var(--muted);text-transform:uppercase;letter-spacing:.065em;margin-bottom:8px}
.publication-list h3{font-size:1.12rem;line-height:1.45}
.publication-list h3 a{color:var(--ink);text-decoration:none}
.publication-list h3 a:hover{color:var(--accent);text-decoration:underline}
.citation{font-size:.87rem;color:var(--muted);margin-top:10px}
.timeline article{display:grid;grid-template-columns:130px minmax(0,1fr);gap:24px;padding:24px 0;border-bottom:1px solid var(--line)}
.timeline article:last-child{border-bottom:0}
.period{color:var(--accent);font-size:.88rem}
.timeline h3{margin-bottom:8px}
.timeline p{font-size:.96rem}
.timeline p+p{margin-top:4px}
.muted{color:var(--muted)}
.contact{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(0,1fr);gap:90px}
.contact h2{margin-bottom:20px}
.contact p{color:var(--muted)}
.email-link{display:inline-block;font-size:1.14rem;margin-top:24px;overflow-wrap:anywhere}
.contact-details h3{font-size:.9rem;margin-bottom:8px}
.contact-details p{font-size:.9rem;margin-bottom:24px}
.site-footer{background:var(--wash);border-top:1px solid var(--line);padding:32px 0}
.site-footer>div{max-width:var(--width);margin:auto;display:flex;justify-content:space-between;gap:32px;font-size:.85rem}
.site-footer span,.site-footer small{color:var(--muted);font-size:.77rem}
.site-footer p+p{margin:0;text-align:right}
.document{padding:48px 0 72px;min-height:60vh}
.document>.back-link{font-size:.85rem}
.page-heading{margin:32px 0}
.page-heading h1{font-size:clamp(2rem,4vw,3rem);max-width:980px;overflow-wrap:anywhere}
.page-heading .eyebrow{margin-bottom:12px}
.document>p,.document>ul{max-width:850px;margin-top:16px}
.document>h2{font-size:1.6rem;border-top:1px solid var(--line);padding-top:28px;margin:38px 0 18px}
.document li{margin-bottom:6px}
.document .publication-list{margin-top:30px}
.document a{overflow-wrap:anywhere}
.project-hero{max-width:none!important;margin:0 0 32px!important;border:1px solid var(--line);border-radius:4px;overflow:hidden;background:var(--wash)}
.project-hero img{display:block;width:100%;aspect-ratio:20/9;object-fit:cover}
.project-hero--diagram img{object-fit:contain}
.project-hero figcaption,.project-figure figcaption{margin:0;padding:10px 14px;background:var(--wash);border-top:1px solid var(--line)}
.project-facts{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1px;background:var(--line);border:1px solid var(--line);border-radius:4px;overflow:hidden;margin:0 0 32px}
.project-facts p{background:var(--paper);padding:18px;margin:0;font-size:.9rem}
.project-facts span{display:block;color:var(--accent);font-size:.69rem;font-weight:650;letter-spacing:.08em;text-transform:uppercase;margin-bottom:6px}
.project-figure{max-width:900px!important;margin:26px 0!important;border:1px solid var(--line);border-radius:4px;overflow:hidden;background:var(--wash)}
.project-figure img{display:block;width:100%;height:auto}
.project-figure--portrait{max-width:700px!important}
.project-link{margin-top:26px!important;font-weight:550}

@media(max-width:1200px){.header-inner,.home,.document,.site-footer>div{margin-left:32px;margin-right:32px}
.hero{gap:48px}
}

@media(max-width:850px){.header-inner{gap:20px}
nav{gap:2px 16px}
.hero{grid-template-columns:minmax(0,1fr) 200px;gap:32px;padding:48px 0}
.portrait img{height:260px;width:200px}
.research-grid{gap:24px}
.contact{gap:40px}
}

@media(max-width:650px){html{scroll-padding-top:160px}
.header-inner,.home,.document,.site-footer>div{margin-left:22px;margin-right:22px}
.header-inner{display:block;padding:12px 0}
.wordmark{display:flex;gap:10px;align-items:baseline;font-size:1rem}
.wordmark span{font-size:.73rem}
nav{margin-top:9px;gap:0 18px}
nav a{font-size:.8rem;padding:7px 0}
.hero{grid-template-columns:1fr;gap:30px;padding:40px 0}
.hero h1{font-size:3rem}
.hero .eyebrow{font-size:.65rem}
.portrait{display:flex;align-items:center;gap:20px}
.portrait img{width:100px;height:125px}
.portrait figcaption{max-width:160px}
.section{padding:40px 0}
.heading-row{display:block}
.heading-row>a{display:inline-block;margin-top:16px}
.research-grid,.project-grid,.contact{grid-template-columns:1fr}
.research-grid{gap:28px}
.research-grid article{border-left:2px solid var(--line);padding-left:18px}
.topic-number{margin-bottom:8px}
.project-card{padding:23px}
.project-card--visual{padding:0}
.project-card--visual .project-card-copy{padding:22px}
.project-facts{grid-template-columns:1fr}
.publication-list li{grid-template-columns:1fr;gap:8px;padding:24px 0}
.publication-year{font-size:.9rem}
.timeline article{grid-template-columns:1fr;gap:8px}
.site-footer>div{display:block}
.site-footer p+p{text-align:left;margin-top:20px}
.contact{gap:30px}
.document{padding-top:32px}
h2{font-size:1.85rem}
}

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

@media print{.site-header,.skip-link,.actions,.back-link{display:none}
.home,.document{max-width:none;margin:0}
.hero,.section{padding:24px 0}
.hero{grid-template-columns:1fr 150px}
.portrait img{width:150px;height:auto}
body{font-size:11pt}
h1{font-size:28pt}
.project-card,.publication-list li,.timeline article{break-inside:avoid}
.site-footer{background:none}
a{color:inherit}
.contact{gap:30px}
}

/* Multilingual profile and academic exchange share the original theme tokens. */
.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}
[hidden]{display:none!important}
.header-inner{flex-wrap:wrap;gap:12px 24px}
.header-inner nav{flex:1;justify-content:flex-end;gap:4px 18px}
.language-picker select{font:inherit;font-size:.8rem;color:var(--ink);background:var(--paper);border:1px solid var(--line);border-radius:3px;padding:8px;min-height:42px}
button:focus-visible,select:focus-visible,.exchange-carousel:focus-visible{outline:3px solid var(--accent);outline-offset:4px}
.status-tag{display:block;width:fit-content;border:1px solid var(--line);border-radius:3px;font-size:.7rem;padding:1px 8px;margin-top:6px;color:var(--accent);background:var(--wash)}
.membership-grid{list-style:none;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:0}
.membership-grid li{border:1px solid var(--line);padding:20px 24px;border-radius:4px}
.membership-role{display:block;font-size:.75rem;color:var(--muted);margin-bottom:6px}
.membership-grid a{font-weight:550;text-decoration:none}
.exchange-carousel{border:1px solid var(--line);border-radius:4px;overflow:hidden;background:var(--wash)}
.exchange-image,.exchange-placeholder{width:100%;height:clamp(220px,38vw,460px);object-fit:contain;background:#eeebe5}
.exchange-placeholder{display:flex;flex-direction:column;align-items:center;justify-content:center;position:relative;isolation:isolate;background:linear-gradient(135deg,#eeebe5 0%,#f8f6f2 55%,#e8e1de 100%);color:var(--accent);overflow:hidden}
.exchange-placeholder:before,.exchange-placeholder:after{content:"";position:absolute;border:1px solid #8b26351c;width:55%;height:160%;transform:rotate(32deg);z-index:-1}
.exchange-placeholder:after{transform:rotate(32deg) translateX(110px)}
.placeholder-number{font-size:4rem;line-height:1.2;font-weight:300;opacity:.5;margin-bottom:14px}
.exchange-placeholder>span:not(.placeholder-number){font-size:1.15rem;font-weight:550}
.exchange-placeholder small{color:var(--muted);font-size:.85rem;margin-top:8px}
.exchange-slide figcaption{padding:24px 28px;margin:0;background:var(--paper)}
.exchange-slide h3{color:var(--ink);margin-bottom:8px}
.exchange-slide figcaption p{font-size:.9rem}
.carousel-controls{border-top:1px solid var(--line);display:flex;align-items:center;gap:12px;padding:16px 28px;background:var(--paper)}
.carousel-controls button{border:1px solid var(--line);background:var(--paper);color:var(--accent);font:inherit;min-height:44px;min-width:44px;border-radius:3px;cursor:pointer;padding:5px 12px}
.carousel-controls button:hover{background:var(--wash);border-color:var(--accent)}
.carousel-controls [data-action=play]{margin-left:auto;font-size:.85rem}
.carousel-count{font-size:.85rem;color:var(--muted);min-width:44px;text-align:center}
html[lang^=zh] body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","PingFang TC","Microsoft YaHei",sans-serif}
html[lang^=zh] h1,html[lang^=zh] h2{letter-spacing:0;line-height:1.4}
@media(max-width:1000px){.header-inner nav{order:3;flex-basis:100%;justify-content:flex-start}.language-picker{margin-left:auto}.header-inner{display:flex}}
@media(max-width:650px){.membership-grid{grid-template-columns:1fr}.header-inner{gap:4px 12px}.header-inner nav{margin-top:4px;gap:0 14px}.wordmark{display:block}.exchange-slide figcaption{padding:20px}.carousel-controls{padding:12px 16px;gap:8px}.language-picker select{max-width:120px}html{scroll-padding-top:190px}}
@media print{.carousel-controls{display:none}.exchange-carousel{break-inside:avoid}}

/* Subtle timer shared by automatic and manual gallery navigation. */
.carousel-progress{height:4px;background:#f3e9eb;overflow:hidden}
.carousel-progress>span{display:block;height:100%;width:100%;background:#cda5ad;transform:scaleX(0);transform-origin:left;will-change:transform}
.event-source{display:inline-block;margin-top:12px;font-size:.82rem}
@media print{.carousel-progress{display:none}}