:root {
  --canvas: #f3f1ec;
  --paper: #fffefb;
  --ink: #18202b;
  --muted: #667180;
  --line: #d9dde2;
  --line-strong: #c4cad1;
  --accent: #244d69;
  --accent-soft: #e9f0f3;
  --sage: #50766d;
  --sage-soft: #edf3f0;
  --warm: #8a6842;
  --warm-soft: #f4eee5;
  --shadow: 0 12px 34px rgba(30, 43, 58, 0.055);
  --max: 1080px;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, "PingFang SC", "Noto Sans CJK SC", sans-serif;
  --serif: Georgia, "Times New Roman", "Songti SC", serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.58;
  text-rendering: optimizeLegibility;
}
img { display: block; max-width: 100%; }
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { opacity: .76; }

.shell { width: min(var(--max), calc(100% - 44px)); margin: 0 auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(243, 241, 236, .93);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(196, 202, 209, .8);
}
.header-inner {
  min-height: 58px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
}
.brand {
  color: var(--ink);
  text-decoration: none;
  font-family: var(--serif);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: .01em;
}
.site-nav { display: flex; flex-wrap: wrap; gap: 18px; }
.site-nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: .8rem;
  font-weight: 600;
}
.site-nav a:hover { color: var(--accent); opacity: 1; }

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 228px;
  gap: 54px;
  align-items: start;
  padding: 58px 0 34px;
}
.eyebrow {
  margin: 0 0 9px;
  color: var(--sage);
  font-family: var(--mono);
  font-size: .69rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
}
h1, h2, h3 { font-family: var(--serif); }
h1 {
  margin: 0 0 14px;
  font-size: clamp(3rem, 6vw, 4.5rem);
  font-weight: 500;
  letter-spacing: -.045em;
  line-height: .98;
}
.altair { color: var(--sage); }
.hero-role {
  max-width: 760px;
  margin: 0;
  color: #435063;
  font-size: 1.06rem;
}
.hero-role strong { color: var(--ink); font-weight: 650; }
.hero-thesis {
  max-width: 780px;
  margin: 20px 0 0;
  padding: 3px 0 3px 15px;
  border-left: 3px solid var(--accent);
  color: #4f5c6e;
  font-family: var(--serif);
  font-size: 1.02rem;
}
.link-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 23px; }
.link-row a {
  display: inline-flex;
  align-items: center;
  min-height: 31px;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: rgba(255, 254, 251, .7);
  color: var(--ink);
  text-decoration: none;
  font-size: .8rem;
  font-weight: 600;
}
.link-row a.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.link-row a:hover { border-color: var(--line-strong); box-shadow: 0 6px 16px rgba(36, 77, 105, .07); opacity: 1; }

.identity-card { margin: 0; }
.portrait {
  width: 228px;
  height: 278px;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: var(--paper);
  box-shadow: var(--shadow);
}
.portrait img { width: 100%; height: 100%; object-fit: cover; object-position: 50% 34%; }
.identity-meta { padding-top: 13px; }
.identity-meta .name { margin: 0; font-family: var(--serif); font-size: 1.02rem; font-weight: 700; }
.identity-meta .alias { margin: 2px 0 9px; color: var(--muted); font-size: .76rem; }
.identity-line { display: grid; grid-template-columns: 55px 1fr; gap: 7px; margin-top: 5px; font-size: .75rem; }
.identity-line span:first-child { color: #8a929c; font-family: var(--mono); font-size: .64rem; text-transform: uppercase; letter-spacing: .05em; }
.identity-line b { font-weight: 600; color: #465264; }

.recent-strip {
  display: grid;
  grid-template-columns: 108px repeat(4, 1fr);
  gap: 0;
  margin-bottom: 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 254, 251, .75);
  overflow: hidden;
}
.recent-label {
  padding: 13px 14px;
  background: var(--accent);
  color: #fff;
  font-family: var(--mono);
  font-size: .66rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
}
.recent-item { padding: 11px 14px; border-left: 1px solid var(--line); }
.recent-item time { display: block; color: var(--warm); font-family: var(--mono); font-size: .62rem; font-weight: 700; }
.recent-item span { display: block; margin-top: 2px; color: #4e5b6c; font-size: .74rem; line-height: 1.38; }

.cv-section {
  display: grid;
  grid-template-columns: 148px minmax(0, 1fr);
  gap: 28px;
  padding: 34px 0;
  border-top: 1px solid var(--line-strong);
}
.section-label { padding-top: 2px; }
.section-label h2 {
  margin: 0;
  color: var(--ink);
  font-family: var(--sans);
  font-size: .74rem;
  font-weight: 750;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.section-label p { margin: 6px 0 0; color: #8a929c; font-family: var(--mono); font-size: .61rem; line-height: 1.45; }
.section-content { min-width: 0; }
.section-lead { max-width: 800px; margin: 0 0 18px; color: #4c596a; font-size: .9rem; }

.focus-list { border-bottom: 1px solid var(--line); }
.focus-row {
  display: grid;
  grid-template-columns: 38px 235px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding: 17px 0;
  border-top: 1px solid var(--line);
}
.focus-index {
  color: var(--sage);
  font-family: var(--mono);
  font-size: .68rem;
  font-weight: 700;
  padding-top: 4px;
}
.focus-row h3 { margin: 0; font-size: 1.03rem; font-weight: 700; line-height: 1.25; }
.focus-copy p { margin: 0 0 8px; color: #536072; font-size: .84rem; }
.keyword-row { display: flex; flex-wrap: wrap; gap: 6px; }
.keyword {
  padding: 3px 7px;
  border-radius: 4px;
  background: var(--accent-soft);
  color: var(--accent);
  font-family: var(--mono);
  font-size: .61rem;
}
.focus-row:nth-child(2) .keyword { background: var(--warm-soft); color: var(--warm); }
.focus-row:nth-child(3) .keyword { background: var(--sage-soft); color: var(--sage); }

.forward-box {
  display: grid;
  grid-template-columns: 1.25fr .75fr;
  gap: 28px;
  padding: 22px 24px;
  border: 1px solid var(--line);
  border-left: 4px solid var(--sage);
  border-radius: 8px;
  background: var(--paper);
  box-shadow: var(--shadow);
}
.forward-box h3 { margin: 0 0 7px; font-size: 1.18rem; }
.forward-box p { margin: 0; color: #4f5c6e; font-size: .86rem; }
.forward-questions { margin: 0; padding-left: 18px; }
.forward-questions li { margin: 5px 0; color: #536072; font-size: .8rem; }
.forward-note { margin-top: 13px !important; color: var(--sage) !important; font-family: var(--serif); font-style: italic; }

.research-list { display: grid; gap: 15px; }
.research-item {
  display: grid;
  grid-template-columns: 176px minmax(0, 1fr);
  gap: 18px;
  align-items: stretch;
  padding: 13px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  box-shadow: var(--shadow);
}
.research-visual {
  min-height: 112px;
  display: grid;
  place-items: center;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #f7f8f8;
}
.research-visual svg { width: 100%; height: 100%; min-height: 112px; }
.research-meta { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 5px; }
.meta-pill {
  padding: 2px 7px;
  border-radius: 4px;
  background: var(--warm-soft);
  color: var(--warm);
  font-family: var(--mono);
  font-size: .6rem;
  font-weight: 700;
}
.research-copy h3 { margin: 0 0 5px; font-size: 1.04rem; line-height: 1.27; }
.research-copy p { margin: 0; color: #566274; font-size: .82rem; }
.research-copy .why { margin-top: 8px; color: #374557; font-size: .78rem; }
.research-copy .why strong { color: var(--sage); }
.paper-links { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 8px; font-size: .76rem; }

.publication {
  display: grid;
  grid-template-columns: 170px minmax(0, 1fr);
  gap: 18px;
  align-items: center;
}
.pub-visual { min-height: 106px; border: 1px solid var(--line); border-radius: 6px; background: var(--accent-soft); overflow: hidden; }
.pub-visual svg { width: 100%; height: 106px; }
.publication h3 { margin: 0 0 5px; font-size: 1.06rem; line-height: 1.28; }
.citation { margin: 0; color: #536072; font-size: .82rem; }
.venue { margin: 7px 0 0; color: var(--warm); font-family: var(--mono); font-size: .66rem; font-weight: 700; }

.timeline { border-top: 1px solid var(--line); }
.timeline-item {
  display: grid;
  grid-template-columns: 132px 46px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 15px 0;
  border-bottom: 1px solid var(--line);
}
.timeline-date { color: #7d8793; font-family: var(--mono); font-size: .66rem; padding-top: 6px; }
.mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--paper);
  color: var(--accent);
  font-family: var(--serif);
  font-size: .67rem;
  font-weight: 700;
  text-align: center;
  line-height: 1.05;
}
.timeline-copy h3 { margin: 0 0 4px; font-size: 1rem; }
.timeline-copy p { margin: 3px 0; color: #566274; font-size: .81rem; }

.two-column { display: grid; grid-template-columns: 1.15fr .85fr; gap: 16px; }
.info-panel { padding: 17px 18px; border: 1px solid var(--line); border-radius: 8px; background: var(--paper); }
.info-panel h3 { margin: 0 0 7px; font-size: 1.02rem; }
.info-panel p, .info-panel li { color: #566274; font-size: .8rem; }
.info-panel p { margin: 4px 0; }
.info-panel ul { margin: 6px 0 0; padding-left: 18px; }
.info-panel li + li { margin-top: 4px; }

.engineering-band {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 22px;
  align-items: center;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #eeefef;
}
.engineering-band h3 { margin: 0 0 4px; font-size: .98rem; }
.engineering-band p { margin: 0; color: #5c6675; font-size: .78rem; }
.engineering-band a { font-family: var(--mono); font-size: .7rem; white-space: nowrap; }

.site-footer { padding: 28px 0 42px; border-top: 1px solid var(--line-strong); }
.footer-inner { display: flex; justify-content: space-between; gap: 22px; align-items: flex-start; }
.footer-quote { max-width: 700px; margin: 0; color: #596575; font-family: var(--serif); font-size: .86rem; font-style: italic; }
.footer-meta { color: #858e99; font-family: var(--mono); font-size: .62rem; text-align: right; }

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr 205px; gap: 34px; }
  .portrait { width: 205px; height: 250px; }
  .recent-strip { grid-template-columns: 94px repeat(2, 1fr); }
  .recent-item:nth-child(4), .recent-item:nth-child(5) { border-top: 1px solid var(--line); }
  .focus-row { grid-template-columns: 34px 190px minmax(0, 1fr); }
  .forward-box { grid-template-columns: 1fr; gap: 15px; }
}

@media (max-width: 720px) {
  .shell { width: min(100% - 28px, var(--max)); }
  .site-nav { display: none; }
  .hero { grid-template-columns: 1fr; padding-top: 38px; }
  .identity-card { display: grid; grid-template-columns: 142px 1fr; gap: 16px; align-items: start; }
  .portrait { width: 142px; height: 174px; }
  .identity-meta { padding-top: 1px; }
  .recent-strip { grid-template-columns: 1fr; }
  .recent-label, .recent-item { border-left: 0; border-top: 1px solid var(--line); }
  .recent-label { border-top: 0; }
  .cv-section { grid-template-columns: 1fr; gap: 13px; padding: 29px 0; }
  .section-label p { display: none; }
  .focus-row { grid-template-columns: 30px minmax(0, 1fr); gap: 10px; }
  .focus-copy { grid-column: 2; }
  .research-item, .publication { grid-template-columns: 1fr; }
  .research-visual { min-height: 135px; }
  .timeline-item { grid-template-columns: 105px 40px minmax(0, 1fr); }
  .two-column { grid-template-columns: 1fr; }
  .engineering-band { grid-template-columns: 1fr; gap: 10px; }
  .engineering-band a { white-space: normal; }
  .footer-inner { flex-direction: column; }
  .footer-meta { text-align: left; }
}

@media (max-width: 500px) {
  h1 { font-size: 2.75rem; }
  .hero-role { font-size: .96rem; }
  .identity-card { grid-template-columns: 112px 1fr; }
  .portrait { width: 112px; height: 138px; }
  .identity-line { grid-template-columns: 48px 1fr; }
  .timeline-item { grid-template-columns: 1fr; gap: 7px; }
  .timeline-date { padding-top: 0; }
  .mark { width: 38px; height: 38px; }
}