:root {
  --cream: #fbfbfa;
  --cream-2: #f5f5f3;
  --paper: #ffffff;
  --ink: #171511;
  --ink-2: #484a4d;
  --ink-3: #6b7178;
  --rule: #dedede;
  --rule-strong: #9c9c9a;
  --link: #437997;
  --link-hover: #2f617e;
  --accent: #437997;
  --accent-strong: #3d7492;
  --accent-soft: #eef6fb;
  --mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;
  --serif: 'Newsreader', 'Iowan Old Style', Georgia, serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--serif);
  background: var(--cream);
  color: var(--ink);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--link);
  text-decoration: none;
  border-bottom: 1px solid color-mix(in oklab, var(--link) 35%, var(--rule));
  transition: color .15s, border-color .15s;
}
a:hover { color: var(--link-hover); border-bottom-color: var(--link-hover); }
a:focus-visible {
  outline: 2px solid color-mix(in oklab, var(--accent) 65%, transparent);
  outline-offset: 3px;
}

.page { max-width: 860px; margin: 0 auto; padding: 56px 40px 120px; }

/* ─── Top bar ─── */
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-2);
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--rule);
  margin-bottom: 64px;
  flex-wrap: wrap;
  gap: 8px 20px;
}
.topbar a { border: none; color: var(--link); }
.topbar a:hover { color: var(--link-hover); }
.topbar .left { display: flex; gap: 22px; flex-wrap: wrap; }
.topbar .right { color: var(--ink-3); display: flex; gap: 14px; align-items: baseline; }
.topbar .right .dot { color: var(--accent); animation: blink 1.6s steps(2) infinite; }
@keyframes blink { 50% { opacity: 0.3; } }

/* ─── Hero · $ whoami ─── */
.hero { margin-bottom: 76px; }
.prompt-line {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink-2);
  margin-bottom: 14px;
}
.prompt-line .p { color: var(--accent-strong); }
.prompt-line .c { color: var(--ink); }

h1.name {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 54px;
  line-height: 1.02;
  letter-spacing: -0.018em;
  margin-bottom: 6px;
}
h1.name .zh {
  display: block;
  font-size: 30px;
  color: var(--ink-2);
  font-weight: 400;
  font-style: italic;
  margin-top: 4px;
}

.role {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--ink-3);
  letter-spacing: 0.02em;
  margin: 18px 0 28px;
}
.role .sep { color: var(--accent-strong); margin: 0 6px; }

.bio p {
  font-size: 18px;
  line-height: 1.7;
  margin-bottom: 14px;
  max-width: 60ch;
}
.bio p + p { color: var(--ink-2); font-size: 16.5px; }
.bio em { font-style: italic; color: var(--accent-strong); font-weight: 500; }

/* ─── Hero side card (portrait + quick facts) ─── */
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 220px;
  gap: 54px;
  align-items: start;
}
.portrait-col {
  width: 100%;
  padding-top: 18px;
}

.portrait {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--rule);
  border-radius: 3px;
  background: var(--paper);
  margin-bottom: 14px;
}

.quick-facts {
  font-family: var(--mono);
  font-size: 11px;
  line-height: 1.75;
  color: var(--ink-2);
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: 3px;
  padding: 18px 20px;
}
.quick-facts div { padding: 4px 0; }
.quick-facts .k { color: var(--ink-3); }

/* ─── Section heading ─── */
.sec { margin-top: 84px; }
.sec-title {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 24px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--rule-strong);
}
.sec-title h2 {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-weight: 500;
}
.sec-title .num {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--accent);
  letter-spacing: 0.06em;
}
.sec-title .meta {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--ink-3);
}


/* ─── News timeline ─── */
.news-row {
  display: grid;
  grid-template-columns: 112px 1fr;
  gap: 20px;
  padding: 14px 0;
  border-top: 1px dashed var(--rule);
  align-items: baseline;
}
.news-list .news-row:last-child { border-bottom: 1px dashed var(--rule); }
.news-row .when {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--ink-3);
}
.news-row strong {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 16.5px;
  display: block;
  margin-bottom: 1px;
}
.news-row .sub {
  font-size: 14.5px;
  color: var(--ink-2);
  font-style: italic;
}

/* ─── Research · notebook style ─── */
.research-group { margin-bottom: 36px; }
.research-group h3 {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 500;
  font-size: 20px;
  color: var(--ink);
  margin-bottom: 4px;
}
.research-group .subhead {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--ink-3);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 14px;
}
.paper {
  padding: 14px 0 14px 18px;
  border-top: 1px dashed var(--rule);
  position: relative;
}
.research-group .paper:last-child { border-bottom: 1px dashed var(--rule); }
.paper::before {
  content: '§';
  position: absolute;
  left: 0; top: 14px;
  font-family: var(--mono);
  font-size: 14px;
  color: var(--ink-3);
}
.paper.active::before { color: var(--accent-strong); }
.paper-title {
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 500;
  line-height: 1.35;
  margin-bottom: 4px;
}
.paper-desc {
  font-size: 14.5px;
  color: var(--ink-2);
  line-height: 1.55;
}
.paper-tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 10px;
  color: var(--ink-3);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-top: 6px;
}

/* ─── CV table ─── */
.cv-row {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 20px;
  padding: 14px 0;
  border-top: 1px dashed var(--rule);
  align-items: baseline;
}
.cv-list .cv-row:last-child { border-bottom: 1px dashed var(--rule); }
.cv-row .when {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--ink-3);
}
.cv-row strong {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 16.5px;
  display: block;
  margin-bottom: 1px;
}
.cv-row .sub { font-size: 14.5px; color: var(--ink-2); font-style: italic; }
.cv-row .note { font-size: 13px; color: var(--ink-3); margin-top: 3px; }

/* ─── Off-duty · curated lists side by side ─── */
.off-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px 40px;
  margin-top: 10px;
}
.list-block h4 {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 8px;
}
.list-block ul {
  list-style: none;
  padding: 0;
  font-size: 14.5px;
  line-height: 1.65;
}
.list-block li {
  padding: 3px 0;
  color: var(--ink);
  display: flex;
  gap: 8px;
  align-items: baseline;
}
.list-block li .bullet {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--ink-3);
  flex-shrink: 0;
}
.list-block li .bullet.hot { color: var(--accent-strong); }
.list-block .note-inline {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--ink-3);
  margin-top: 10px;
  font-style: italic;
}

/* ─── Contact footer ─── */
.sign-off {
  margin-top: 80px;
  padding-top: 28px;
  border-top: 1px solid var(--rule-strong);
}
.sign-off .ascii-sig {
  font-family: var(--mono);
  font-size: 10px;
  line-height: 1.25;
  color: var(--ink-3);
  white-space: pre;
  margin-bottom: 18px;
}
.sign-off .sig-text {
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.65;
  margin-bottom: 18px;
  color: var(--ink);
}
.sign-off .sig-text a { color: var(--link); border-bottom: 1px solid color-mix(in oklab, var(--link) 55%, var(--rule)); }
.sign-off .links {
  display: flex; flex-wrap: wrap; gap: 18px;
  font-family: var(--mono);
  font-size: 12px;
}
.sign-off .links a { border: none; color: var(--link); }
.sign-off .links a:hover { color: var(--link-hover); }
.sign-off .links a::before { content: '»  '; color: var(--ink-3); }

footer.tail {
  margin-top: 48px;
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--ink-3);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  letter-spacing: 0.02em;
}

@media (max-width: 640px) {
  .page { padding: 28px 22px 80px; }
  h1.name { font-size: 38px; }
  h1.name .zh { font-size: 24px; }
  .bio p { font-size: 16.5px; }
  .hero-grid { grid-template-columns: 1fr; }
  .portrait-col { max-width: 280px; padding-top: 0; }
  .news-row { grid-template-columns: 1fr; gap: 4px; }
  .cv-row { grid-template-columns: 1fr; gap: 4px; }
  .off-grid { grid-template-columns: 1fr; }
}


@media (max-width: 640px) {
  .quick-facts { line-height: 1.9; font-size: 11.5px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .topbar .right .dot { animation: none; }
}