:root {
  --bg: #ffffff;
  --surface: #f6f7f9;
  --text: #1c1e21;
  --muted: #5f6670;
  --faint: #8a919b;
  --line: #e6e8eb;
  --accent: #1f5fbf;
  --accent-soft: #edf3fc;
  --accent-ink: #1a4f9e;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111317;
    --surface: #191c21;
    --text: #e7e9ec;
    --muted: #a1a8b2;
    --faint: #7a828d;
    --line: #262a31;
    --accent: #7eb0ff;
    --accent-soft: #1a2433;
    --accent-ink: #a9c9ff;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 var(--sans);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
svg { width: 16px; height: 16px; flex: none; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
svg.fill { fill: currentColor; stroke: none; }

/* Layout */
.page {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 32px;
  display: grid;
  grid-template-columns: 232px minmax(0, 1fr);
  gap: 72px;
}
.profile {
  position: sticky;
  top: 0;
  align-self: start;
  padding-top: 72px;
}
.content { min-width: 0; max-width: 760px; }

/* Profile */
.avatar { display: block; width: 132px; height: 132px; border-radius: 50%; object-fit: cover; }
.who h1 { margin: 20px 0 4px; font-size: 1.6rem; line-height: 1.25; font-weight: 650; letter-spacing: -0.01em; }
.role { color: var(--muted); }
.role .org { display: block; }
.loc { display: flex; align-items: center; gap: 6px; margin-top: 8px; color: var(--muted); font-size: 0.92rem; }
.contact { margin-top: 24px; padding-top: 20px; border-top: 1px solid var(--line); display: grid; gap: 10px; }
.contact a { display: flex; align-items: center; gap: 10px; color: var(--text); font-size: 0.95rem; flex-wrap: wrap; }
.contact a:hover { color: var(--accent); text-decoration: none; }
.contact svg { color: var(--muted); }
.contact a:hover svg { color: var(--accent); }
.cites { flex-basis: 100%; padding-left: 26px; margin-top: -4px; color: var(--faint); font-size: 0.82rem; }

/* Section nav */
.toc {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  gap: 28px;
  padding: 22px 0 0;
  background: color-mix(in srgb, var(--bg) 94%, transparent);
  backdrop-filter: saturate(180%) blur(10px);
  -webkit-backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.toc a {
  padding-bottom: 12px;
  color: var(--muted);
  font-size: 0.93rem;
  font-weight: 500;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
}
.toc a:hover { color: var(--text); text-decoration: none; }
.toc a.active { color: var(--text); border-bottom-color: var(--accent); }

/* Sections */
section { padding-top: 48px; }
h2 { margin: 0 0 20px; font-size: 1.3rem; font-weight: 650; letter-spacing: -0.01em; }

.intro p + p { margin-top: 14px; }
.intro { font-size: 1.04rem; }

.tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.tags li { padding: 3px 12px; border-radius: 999px; background: var(--accent-soft); color: var(--accent-ink); font-size: 0.85rem; font-weight: 500; }


/* News */
.news li { display: grid; grid-template-columns: 84px minmax(0, 1fr); gap: 16px; padding: 7px 0; }
.news time { color: var(--faint); font-size: 0.9rem; font-variant-numeric: tabular-nums; padding-top: 1px; white-space: nowrap; }
.news em { font-style: normal; font-weight: 500; color: var(--text); }
.news strong { font-weight: 600; }
.news li > div { color: var(--muted); }

/* Publications */
.hint { color: var(--faint); font-size: 0.88rem; margin: -14px 0 8px; }

.year { margin: 24px 0 4px; font-size: 0.85rem; font-weight: 600; color: var(--faint); font-variant-numeric: tabular-nums; }
.pub { display: grid; grid-template-columns: 84px minmax(0, 1fr); gap: 16px; padding: 12px 0; border-top: 1px solid var(--line); }
.year + .pubs .pub:first-child { border-top: 0; }
.venue {
  align-self: start;
  justify-self: start;
  margin-top: 2px;
  padding: 1px 8px;
  border-radius: 6px;
  background: var(--accent-soft);
  color: var(--accent-ink);
  font-size: 0.78rem;
  font-weight: 600;
  white-space: nowrap;
}
.pub .title { font-weight: 600; line-height: 1.45; }
.pub .authors { margin-top: 4px; color: var(--muted); font-size: 0.9rem; line-height: 1.55; }
.pub .authors strong { color: var(--text); font-weight: 600; }
.pub .note { color: var(--faint); font-size: 0.82rem; }
.pub .links { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.pub .links a {
  padding: 1px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 0.8rem;
  color: var(--muted);
}
.pub .links a:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }

/* Service */
.service div { display: grid; grid-template-columns: 168px minmax(0, 1fr); gap: 16px; padding: 10px 0; border-top: 1px solid var(--line); }
.service div:first-child { border-top: 0; padding-top: 0; }
.service dt { color: var(--muted); font-size: 0.92rem; }
.service dd { margin: 0; font-size: 0.95rem; }

footer { margin: 64px 0 40px; padding-top: 20px; border-top: 1px solid var(--line); color: var(--faint); font-size: 0.82rem; }

/* Narrow screens: profile becomes a header card, nav scrolls */
@media (max-width: 880px) {
  .page { display: block; padding: 0 20px; }
  .profile { position: static; padding-top: 28px; display: grid; grid-template-columns: 76px minmax(0, 1fr); column-gap: 16px; align-items: center; }
  .avatar { width: 76px; height: 76px; }
  .who h1 { margin: 0 0 2px; font-size: 1.35rem; }
  .role { font-size: 0.92rem; line-height: 1.4; }
  .role .org { display: inline; }
  .role .org::before { content: " · "; }
  .loc { margin-top: 2px; font-size: 0.85rem; }
  .contact { grid-column: 1 / -1; display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; padding-top: 0; border-top: 0; }
  .contact a { padding: 6px 12px; border: 1px solid var(--line); border-radius: 999px; font-size: 0.88rem; gap: 6px; flex-wrap: nowrap; }
  .cites { flex-basis: auto; padding-left: 0; margin: 0 0 0 2px; }
  .cites::before { content: "· "; }
  .toc { gap: 22px; overflow-x: auto; scrollbar-width: none; margin-top: 16px; padding-top: 12px; }
  .toc a { white-space: nowrap; }
  section { padding-top: 36px; }
  .news li { grid-template-columns: 1fr; gap: 0; padding: 8px 0; }
  .pub { grid-template-columns: 1fr; gap: 6px; }
  .service div { grid-template-columns: 1fr; gap: 2px; }
}