:root {
  --ink: #1c2222;
  --muted: #66635e;
  --paper: #f3efe7;
  --surface: #fcfbf8;
  --line: #d8d0c5;
  --line-soft: rgba(87, 75, 65, .12);
  --accent: #853540;
  --accent-dark: #64252e;
  --copper: #b28b61;
  --slate: #1d2728;
  --slate-soft: #293334;
  --shadow-sm: 0 8px 24px rgba(42, 34, 28, .055);
  --shadow-md: 0 18px 45px rgba(35, 29, 25, .09);
  --serif: Constantia, "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  --sans: "Segoe UI Variable Text", "Segoe UI", Helvetica, Arial, sans-serif;
  --max: 1100px;
}

* { box-sizing: border-box; }
::selection { color: #fff; background: var(--accent); }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body { position: relative; margin: 0; color: var(--ink); background: var(--paper); font: 16px/1.72 var(--sans); font-kerning: normal; text-rendering: optimizeLegibility; -webkit-font-smoothing: antialiased; }
body::before { position: fixed; z-index: -2; inset: 0; background: radial-gradient(circle at 6% 12%, rgba(133,53,64,.06), transparent 24%), radial-gradient(circle at 92% 68%, rgba(178,139,97,.08), transparent 28%), repeating-linear-gradient(90deg, rgba(39,44,44,.015) 0, rgba(39,44,44,.015) 1px, transparent 1px, transparent 112px), var(--paper); content: ""; }
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--accent-dark); }
a:focus-visible, button:focus-visible { outline: 2px solid #b96c72; outline-offset: 4px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; }
.skip-link { position: fixed; z-index: 100; top: 8px; left: 8px; padding: 8px 12px; color: #fff; background: var(--accent); transform: translateY(-150%); }
.skip-link:focus { transform: none; }

.site-header { position: sticky; z-index: 50; top: 0; color: #fff; background: rgba(24,32,33,.93); border-bottom: 1px solid rgba(255,255,255,.1); box-shadow: 0 8px 30px rgba(9,15,15,.08); backdrop-filter: blur(20px) saturate(1.2); }
.scroll-progress { position: absolute; right: 0; bottom: -1px; left: 0; width: 0; height: 2px; background: #b95d66; box-shadow: 0 0 12px rgba(185,93,102,.45); }
.nav-shell { display: flex; align-items: center; width: min(calc(100% - 56px), var(--max)); min-height: 68px; margin: auto; }
.wordmark { margin-right: auto; color: #fff; font-family: var(--serif); font-size: 1.05rem; font-weight: 700; text-decoration: none; letter-spacing: .015em; }
.wordmark::after { display: inline-block; width: 4px; height: 4px; margin-left: .5rem; background: #b95d66; border-radius: 50%; vertical-align: middle; content: ""; }
.site-nav { display: flex; align-items: center; gap: 1.7rem; }
.site-nav a { position: relative; color: #dcdfdd; font-size: .67rem; font-weight: 750; text-decoration: none; text-transform: uppercase; letter-spacing: .12em; }
.site-nav a:hover, .site-nav a.active { color: #fff; }
.site-nav a.active::after { position: absolute; right: 0; bottom: -.55rem; left: 0; height: 1px; background: var(--copper); content: ""; }
.nav-toggle { display: none; width: 40px; height: 40px; padding: 9px; border: 0; color: inherit; background: transparent; }
.nav-toggle > span:not(.sr-only) { display: block; height: 1px; margin: 5px 0; background: currentColor; }

.hero { position: relative; overflow: hidden; color: #fff; background: linear-gradient(118deg, #172223 0%, #263132 52%, #222a2b 100%); }
.hero::before { position: absolute; inset: 0; background-image: linear-gradient(rgba(255,255,255,.026) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.026) 1px, transparent 1px), radial-gradient(circle at 78% 24%, rgba(178,139,97,.17), transparent 30%); background-size: 58px 58px, 58px 58px, auto; -webkit-mask-image: linear-gradient(90deg, #000, transparent 94%); mask-image: linear-gradient(90deg, #000, transparent 94%); content: ""; }
.hero::after { position: absolute; top: -290px; right: -70px; width: 650px; height: 650px; border: 1px solid rgba(198,156,114,.2); border-radius: 50%; box-shadow: 0 0 0 92px rgba(198,156,114,.024), 0 0 0 184px rgba(198,156,114,.014); content: ""; }
.hero-inner { position: relative; z-index: 1; display: grid; grid-template-columns: 236px 1fr; gap: clamp(3.2rem, 6.5vw, 5.6rem); align-items: center; width: min(calc(100% - 56px), var(--max)); min-height: 420px; margin: auto; padding: 52px 0 56px; }
.portrait-wrap { position: relative; width: 236px; }
.portrait-wrap::before { position: absolute; inset: 14px -14px -14px 14px; border: 1px solid rgba(208,180,149,.34); content: ""; }
.portrait-wrap::after { position: absolute; right: -28px; bottom: -28px; width: 54px; height: 54px; border-right: 2px solid var(--accent); border-bottom: 2px solid var(--accent); content: ""; }
.portrait { position: relative; display: block; width: 236px; height: 290px; object-fit: cover; object-position: center 20%; box-shadow: 0 24px 56px rgba(0,0,0,.32); filter: saturate(.76) contrast(1.07); }
.eyebrow { display: flex; align-items: center; gap: .8rem; margin: 0 0 1.15rem; color: #d3b3a7; font-size: .68rem; font-weight: 750; text-transform: uppercase; letter-spacing: .19em; }
.eyebrow::before { width: 34px; height: 1px; background: var(--copper); content: ""; }
.hero h1 { margin: 0; font-family: var(--serif); font-size: clamp(2.25rem, 3.45vw, 3rem); font-weight: 400; line-height: 1.04; letter-spacing: -.04em; }
.hero h1 span { margin-left: .48em; color: #d2aea7; font-family: "Microsoft YaHei", "PingFang SC", sans-serif; font-size: .57em; font-weight: 300; letter-spacing: .04em; white-space: nowrap; }
.role { margin: 1.35rem 0 .1rem; font-family: var(--serif); font-size: 1.02rem; letter-spacing: .015em; }
.affiliation { margin: 0; color: #b7bdbc; font-size: .83rem; letter-spacing: .015em; }
.contact-row, .profile-links { display: flex; flex-wrap: wrap; gap: .45rem 1.4rem; }
.contact-row { margin-top: 1.15rem; }
.profile-links { margin-top: 1rem; }
.contact-row a, .profile-links a { color: #eceeec; font-size: .73rem; text-decoration-color: rgba(255,255,255,.34); }
.profile-links a { font-weight: 700; }
.motto { position: relative; max-width: 520px; margin: 1.35rem 0 0; padding: .05rem 0 .05rem 1.75rem; border-left: 1px solid var(--copper); color: #d1cbc0; font-family: var(--serif); font-size: .9rem; font-style: italic; font-weight: 400; letter-spacing: .025em; }
.motto::before { position: absolute; top: -.28rem; left: .72rem; color: rgba(210,174,167,.55); font-size: 1.35rem; font-style: normal; content: "“"; }

.content-shell { width: min(calc(100% - 56px), var(--max)); margin: auto; }
.section { position: relative; z-index: 0; display: block; padding: 44px 0 48px; border-bottom: 1px solid var(--line); }
.section::before { position: absolute; z-index: -1; inset: 0; background: rgba(251,250,247,.64); box-shadow: 0 0 0 100vmax rgba(251,250,247,.64); clip-path: inset(0 -100vmax); content: ""; }
.section:nth-child(even)::before { background: rgba(236,231,221,.66); box-shadow: 0 0 0 100vmax rgba(236,231,221,.66); }
.section-label { display: flex; align-items: center; gap: .7rem; min-height: 0; margin-bottom: 1.35rem; }
.section-label::after { width: 72px; height: 1px; margin-left: .35rem; background: linear-gradient(90deg, var(--copper), transparent); content: ""; }
.section-label span { display: grid; width: 28px; height: 28px; place-items: center; color: var(--copper); border: 1px solid rgba(178,139,97,.48); border-radius: 50%; font: 700 .56rem/1 var(--sans); letter-spacing: .06em; }
.section-label h2 { margin: 0; color: var(--accent); font: 500 1.78rem/1.15 var(--serif); letter-spacing: -.025em; }
.section-body { width: 100%; min-width: 0; }
.prose > p { max-width: 920px; margin: 0 0 .75rem; font-size: .95rem; letter-spacing: .004em; }
.prose > p:last-child { margin-bottom: 0; }

.news-list, .publication-list { margin: 0; padding: 0; list-style: none; }
.news-list li { position: relative; display: grid; grid-template-columns: 105px 1fr; gap: .9rem; padding: .48rem .65rem; border-bottom: 1px solid var(--line-soft); transition: background .2s ease, transform .2s ease; }
.news-list li::before { position: absolute; top: .93rem; left: 0; width: 3px; height: 3px; background: var(--copper); border-radius: 50%; content: ""; }
.news-list li:hover { background: rgba(255,255,255,.34); transform: translateX(3px); }
.news-list time { color: var(--accent); font-size: .69rem; font-weight: 700; text-transform: uppercase; letter-spacing: .07em; }
.news-list p { margin: 0; font-size: .91rem; }
.legend { margin: 0 0 .9rem; color: var(--muted); font-size: .7rem; }
.publication-list { counter-reset: papers; }
.publication { position: relative; margin: 0 0 .42rem; padding: .9rem 1.1rem .95rem 3.75rem; background: rgba(255,255,255,.26); border: 1px solid transparent; border-bottom-color: var(--line); counter-increment: papers; transition: border-color .22s ease, transform .22s ease, background .22s ease, box-shadow .22s ease; }
.publication:hover { background: rgba(255,255,255,.78); border-color: rgba(132,47,58,.18); box-shadow: var(--shadow-md); transform: translateY(-2px); }
.publication::before { position: absolute; top: 1.08rem; left: 1.05rem; display: grid; width: 28px; height: 28px; place-items: center; color: #8c8176; border: 1px solid rgba(140,129,118,.35); border-radius: 50%; font: .66rem/1 var(--serif); content: counter(papers, decimal-leading-zero); }
.publication h3 { max-width: 900px; margin: 0 0 .28rem; font-family: var(--serif); font-size: 1.13rem; font-weight: 600; line-height: 1.42; letter-spacing: -.01em; }
.authors, .venue { margin: .08rem 0; font-size: .83rem; line-height: 1.45; }
.authors { color: var(--muted); }
.venue { font-style: italic; }
.badge { display: inline-block; margin-left: .38rem; padding: .07rem .4rem; border: 1px solid currentColor; border-radius: 999px; font: 750 .56rem/1.35 var(--sans); font-style: normal; letter-spacing: .045em; }
.badge-a { color: var(--accent); }
.badge-b { color: #386778; }
.paper-links { display: flex; flex-wrap: wrap; gap: .35rem; margin-top: .35rem; }
.paper-links a { padding: .15rem .44rem; color: var(--accent); background: rgba(133,53,64,.045); border: 1px solid rgba(133,53,64,.18); font-size: .69rem; font-weight: 750; line-height: 1.35; text-decoration: none; text-transform: uppercase; letter-spacing: .08em; transition: color .2s ease, background .2s ease, border-color .2s ease; }
.paper-links a:hover { color: #fff; background: var(--accent); border-color: var(--accent); }
.paper-links a::after { content: " ↗"; }
.preprint-list { display: grid; gap: .55rem; }
.preprint-list article { position: relative; padding: .9rem 1.05rem .9rem 1.25rem; background: rgba(255,255,255,.54); border: 1px solid var(--line); box-shadow: var(--shadow-sm); transition: border-color .2s ease, transform .2s ease, box-shadow .2s ease; }
.preprint-list article::before { position: absolute; top: -1px; bottom: -1px; left: -1px; width: 3px; background: var(--accent); content: ""; }
.preprint-list article:hover { border-color: rgba(132,47,58,.25); box-shadow: var(--shadow-md); transform: translateY(-2px); }
.preprint-list h4 { max-width: 900px; margin: 0 0 .25rem; font: 600 1.1rem/1.43 var(--serif); }
.preprint-list p { margin: 0; color: var(--muted); font-size: .82rem; line-height: 1.55; }

.site-footer { display: flex; justify-content: space-between; align-items: end; gap: 2rem; padding: 56px max(28px, calc((100% - var(--max))/2)); color: #bdc3c2; background: linear-gradient(110deg, #162021, #293334); border-top: 2px solid var(--accent); font-size: .69rem; letter-spacing: .035em; }
.site-footer strong { color: #fff; font-family: var(--serif); font-size: 1rem; }
.site-footer p { margin: .15rem 0 0; }
.to-top { position: fixed; z-index: 40; right: 24px; bottom: 24px; display: grid; width: 42px; height: 42px; place-items: center; border: 1px solid rgba(255,255,255,.22); border-radius: 50%; color: #fff; background: rgba(37,39,40,.9); box-shadow: 0 8px 28px rgba(0,0,0,.16); opacity: 0; pointer-events: none; transform: translateY(8px); transition: opacity .2s ease, transform .2s ease, background .2s ease; }
.to-top.visible { opacity: 1; pointer-events: auto; transform: none; }
.to-top:hover { background: var(--accent); }

@media (max-width: 860px) {
  html { scroll-padding-top: 62px; }
  .nav-shell { width: calc(100% - 36px); min-height: 62px; }
  .nav-toggle { display: block; cursor: pointer; }
  .site-nav { position: absolute; top: 62px; right: 0; left: 0; display: none; align-items: stretch; gap: 0; padding: .7rem 18px 1rem; background: var(--slate); border-top: 1px solid rgba(255,255,255,.12); }
  .site-nav.open { display: grid; }
  .site-nav a { padding: .62rem 0; }
  .site-nav a.active::after { display: none; }
  .hero-inner { grid-template-columns: 150px 1fr; gap: 2rem; width: calc(100% - 36px); min-height: 385px; padding: 44px 0; }
  .portrait-wrap, .portrait { width: 150px; }
  .portrait { height: 190px; }
  .hero h1 { font-size: 2rem; }
  .hero h1 span { display: block; margin: .3rem 0 0; }
  .contact-row { display: grid; gap: .25rem; }
  .content-shell { width: calc(100% - 36px); }
  .section { padding: 34px 0 38px; }
  .section-label { margin-bottom: 1.05rem; }
  .publication { padding-right: 1.1rem; }
}

@media (max-width: 520px) {
  body { font-size: 15px; }
  .hero-inner { grid-template-columns: 1fr; gap: 1.8rem; }
  .portrait-wrap, .portrait { width: 135px; }
  .portrait { height: 165px; }
  .portrait-wrap::before { inset: 9px -9px -9px 9px; }
  .hero h1 { font-size: 1.95rem; }
  .motto { font-size: .82rem; }
  .role { margin-top: 1rem; }
  .news-list li { grid-template-columns: 78px 1fr; gap: .7rem; }
  .publication { padding: .85rem .75rem .9rem 2.7rem; }
  .publication::before { top: .97rem; left: .55rem; width: 24px; height: 24px; font-size: .6rem; }
  .paper-links a { padding: .16rem .4rem; }
  .site-footer { display: block; }
  .site-footer > p { margin-top: 1.2rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .publication, .to-top { transition: none; }
}