:root {
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
  --font-serif: "Iowan Old Style", "Charter", "Palatino Linotype", Palatino, Georgia,
    "Songti SC", "Noto Serif SC", "Times New Roman", serif;
  --font-mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;

  --sidebar-w: 320px;
  --maxw: 1060px;
  --radius-card: 16px;
  --radius-pill: 999px;
  --ease: cubic-bezier(.22, .61, .36, 1);
}

html[data-theme="light"] {
  --bg: #f6f6f3;
  --surface: #ffffff;
  --sidebar: #fdfdfc;
  --text: #15181e;
  --text-soft: #4c5462;
  --muted: #8b929e;
  --border: #e7e7e1;
  --border-strong: #d7d7d0;
  --accent: #1c4e8e;
  --accent-soft: rgba(28, 78, 142, .085);
  --accent-line: rgba(28, 78, 142, .25);
  --fig-grid: rgba(28, 78, 142, .1);
  --fig-axis: rgba(28, 78, 142, .22);
  --fig-line: rgba(28, 78, 142, .3);
  --fig-path: rgba(28, 78, 142, .78);
  --fig-point: #1c4e8e;
  --fig-alt: rgba(186, 105, 53, .85);
  --shadow-sm: 0 1px 2px rgba(20, 26, 36, .04);
  --shadow-md: 0 12px 30px rgba(20, 26, 36, .07);
  --on-accent: #ffffff;
}

html[data-theme="dark"] {
  --bg: #0e1116;
  --surface: #151a21;
  --sidebar: #12161c;
  --text: #e8ebf0;
  --text-soft: #b2b9c5;
  --muted: #79828f;
  --border: #232a34;
  --border-strong: #303845;
  --accent: #8fb6ff;
  --accent-soft: rgba(143, 182, 255, .13);
  --accent-line: rgba(143, 182, 255, .3);
  --fig-grid: rgba(143, 182, 255, .09);
  --fig-axis: rgba(143, 182, 255, .2);
  --fig-line: rgba(143, 182, 255, .28);
  --fig-path: rgba(143, 182, 255, .8);
  --fig-point: #8fb6ff;
  --fig-alt: rgba(224, 149, 95, .9);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, .3);
  --shadow-md: 0 14px 34px rgba(0, 0, 0, .4);
  --on-accent: #0e1116;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.72;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color .3s var(--ease), color .3s var(--ease);
}

h1, h2, h3, h4 { line-height: 1.25; }
p { margin: 0; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
ol, ul, dl, dd { margin: 0; padding: 0; list-style: none; }
svg { display: block; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 12px;
  z-index: 99;
  padding: 10px 18px;
  border-radius: var(--radius-pill);
  background: var(--accent);
  color: var(--on-accent);
  font-size: .85rem;
}
.skip-link:focus { left: 16px; }

html[data-lang="zh"] .l-en { display: none !important; }
html[data-lang="en"] .l-zh { display: none !important; }

.layout { min-height: 100vh; }

/* ---------- sidebar ---------- */

.sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  width: var(--sidebar-w);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 28px;
  padding: 46px 30px 26px;
  overflow-y: auto;
  text-align: center;
  background: var(--sidebar);
  border-right: 1px solid var(--border);
  transition: background-color .3s var(--ease), border-color .3s var(--ease);
}

.avatar {
  display: grid;
  place-items: center;
  width: 118px;
  height: 118px;
  margin: 0 auto;
  padding: 6px;
  border-radius: 50%;
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: border-color .25s var(--ease), transform .25s var(--ease);
}
.avatar { cursor: pointer; }
.avatar:hover { border-color: var(--accent-line); transform: translateY(-2px); }
.avatar img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  background: var(--accent-soft);
}

.identity { margin-top: 24px; }
.identity__name {
  margin: 0;
  font-size: 1.32rem;
  font-weight: 650;
  letter-spacing: .04em;
}
.identity__name-en {
  margin: 7px 0 0;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--muted);
}
.identity__role {
  margin: 15px 0 0;
  color: var(--accent);
  font-size: .69rem;
  font-weight: 650;
  letter-spacing: .2em;
  text-transform: uppercase;
}
.identity__affil {
  margin: 7px 0 0;
  color: var(--muted);
  font-size: .73rem;
  letter-spacing: .04em;
  line-height: 1.7;
}

.nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
  width: 100%;
  max-width: 216px;
  margin: 36px auto 0;
}
.nav a {
  display: block;
  padding: 7px 14px;
  border-radius: var(--radius-pill);
  font-size: .87rem;
  color: var(--text-soft);
  transition: background-color .2s var(--ease), color .2s var(--ease);
}
.nav a:hover { background: var(--accent-soft); color: var(--text); }
.nav a.is-active { background: var(--accent-soft); color: var(--accent); font-weight: 600; }

.sidebar__foot { display: flex; flex-direction: column; align-items: center; gap: 16px; }

.sidebar__controls { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 8px; }

.lang-switch {
  display: inline-flex;
  gap: 2px;
  padding: 3px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-pill);
  background: var(--surface);
  transition: border-color .22s var(--ease), background-color .3s var(--ease);
}
.lang-switch__btn {
  padding: 6px 15px;
  border: 0;
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: .75rem;
  letter-spacing: .05em;
  cursor: pointer;
  transition: background-color .2s var(--ease), color .2s var(--ease);
}
.lang-switch__btn:hover { color: var(--text-soft); }
.lang-switch__btn[aria-pressed="true"] { background: var(--accent-soft); color: var(--accent); font-weight: 600; }

.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 9px 20px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-pill);
  background: var(--surface);
  color: var(--text-soft);
  font: inherit;
  font-size: .81rem;
  cursor: pointer;
  transition: border-color .22s var(--ease), color .22s var(--ease), background-color .3s var(--ease);
}
.theme-toggle:hover { border-color: var(--accent); color: var(--accent); }
.theme-toggle__icon svg { width: 15px; height: 15px; }
.icon-sun { display: none; }
html[data-theme="dark"] .icon-moon { display: none; }
html[data-theme="dark"] .icon-sun { display: block; }

.sidebar__copy {
  padding-top: 16px;
  border-top: 1px solid var(--border);
  width: 100%;
  font-size: .67rem;
  line-height: 1.7;
  color: var(--muted);
}

.socials { display: flex; gap: 4px; }
.socials a {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  color: var(--muted);
  transition: background-color .2s var(--ease), color .2s var(--ease);
}
.socials a:hover { background: var(--accent-soft); color: var(--accent); }
.socials svg { width: 16px; height: 16px; }

/* ---------- main ---------- */

.main {
  margin-left: var(--sidebar-w);
  min-height: 100vh;
}

.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 56px;
}

.hero {
  display: flex;
  align-items: center;
  min-height: 100vh;
  padding: 104px 0 88px;
}
.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
  gap: 64px;
  align-items: center;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  font-family: var(--font-mono);
  font-size: .71rem;
  letter-spacing: .17em;
  text-transform: uppercase;
  color: var(--accent);
}
.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--accent-line);
}

.hero__title {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(2.25rem, 4.2vw, 3.55rem);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -.02em;
}
.hero__title em {
  font-style: italic;
  color: var(--accent);
}

.hero__lede {
  max-width: 46ch;
  margin-top: 26px;
  font-size: 1rem;
  color: var(--text-soft);
}

.hero__keywords {
  margin-top: 20px;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .045em;
  text-wrap: balance;
  color: var(--muted);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 11px 24px;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  font-size: .86rem;
  font-weight: 550;
  white-space: nowrap;
  transition: transform .22s var(--ease), box-shadow .22s var(--ease),
    border-color .22s var(--ease), color .22s var(--ease), background-color .22s var(--ease);
}
.btn svg { width: 16px; height: 16px; }
.btn--primary { background: var(--accent); color: var(--on-accent); }
.btn--primary:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn--ghost {
  background: var(--surface);
  border-color: var(--border-strong);
  color: var(--text-soft);
}
.btn--ghost:hover { border-color: var(--accent); color: var(--accent); }

.figure {
  margin: 0;
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  transition: background-color .3s var(--ease), border-color .3s var(--ease);
}
.figure__plot { width: 100%; height: auto; }
.figure__photo {
  width: 100%;
  height: auto;
  border-radius: 10px;
  background: var(--accent-soft);
}
.figure figcaption {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: .67rem;
  letter-spacing: .09em;
  text-transform: uppercase;
  color: var(--muted);
}

.section {
  padding: 92px 0;
  border-top: 1px solid var(--border);
}
.section--contact { padding-bottom: 72px; }

.section__head {
  max-width: 60ch;
  margin-bottom: 46px;
}
.section__index {
  display: block;
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: .71rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--accent);
}
.section__title {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 2.5vw, 2.05rem);
  font-weight: 600;
  letter-spacing: -.01em;
}
.section__lede {
  margin-top: 16px;
  color: var(--text-soft);
  font-size: .98rem;
}

.section__sub {
  margin: 0 0 30px;
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 2.5vw, 2.05rem);
  font-weight: 600;
  letter-spacing: -.01em;
}

.card {
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  transition: border-color .25s var(--ease), transform .25s var(--ease),
    box-shadow .25s var(--ease), background-color .3s var(--ease);
}
.card:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-md);
}

.card__tag {
  display: inline-block;
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: .67rem;
  letter-spacing: .17em;
  text-transform: uppercase;
  color: var(--muted);
}
.card p { color: var(--text-soft); font-size: .95rem; }
.card__meta { margin-top: 16px !important; font-size: .88rem !important; }

.link {
  color: var(--accent);
  border-bottom: 1px solid var(--accent-line);
  transition: border-color .2s var(--ease);
}
.link:hover { border-color: var(--accent); }

.about-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.topics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(248px, 1fr));
  gap: 18px;
}

.topic h3 { margin: 0; font-size: .99rem; font-weight: 650; letter-spacing: .005em; }
.topic p { margin-top: 9px; font-size: .89rem; line-height: 1.68; }
.topic__icon {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  margin-bottom: 18px;
  border-radius: 11px;
  background: var(--accent-soft);
  color: var(--accent);
}
.topic__icon svg { width: 21px; height: 21px; }
.topic:hover { transform: translateY(-3px); }

.timeline {
  position: relative;
  padding-left: 26px;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 12px;
  width: 1px;
  background: var(--border-strong);
}
.tl-item {
  position: relative;
  padding-bottom: 38px;
  max-width: 66ch;
}
.tl-item:last-child { padding-bottom: 0; }
.tl-item::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 8px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--surface);
  border: 1.5px solid var(--accent);
}
.tl-item__date {
  font-family: var(--font-mono);
  font-size: .67rem;
  letter-spacing: .17em;
  text-transform: uppercase;
  color: var(--muted);
}
.tl-item__title { margin: 8px 0 0; font-size: 1.02rem; font-weight: 650; }
.tl-item__org { margin-top: 4px; font-size: .92rem; color: var(--accent); }
.tl-item__desc { margin-top: 8px; font-size: .89rem; color: var(--text-soft); }

.section__sub--gap { margin-top: 56px; }

.tl-item--plain .tl-item__title { margin-top: 0; }
.tl-item--plain::before { top: 5px; }

.tl-item__title a {
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}
.tl-item__title a:hover { color: var(--accent); border-color: var(--accent-line); }
.tl-item__org a {
  border-bottom: 1px solid var(--accent-line);
  transition: border-color .2s var(--ease);
}
.tl-item__org a:hover { border-color: var(--accent); }
.entry__org a {
  border-bottom: 1px solid var(--accent-line);
  transition: border-color .2s var(--ease);
}
.entry__org a:hover { border-color: var(--accent); }

.facts--edu { margin-top: 46px; }

.publications { counter-reset: pub; display: grid; gap: 38px; }
.pub-group__label {
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--accent);
}
.pub-list { display: grid; gap: 22px; margin-top: 22px; }
.pub-item {
  counter-increment: pub;
  position: relative;
  padding-left: 44px;
}
.pub-item::before {
  content: "[" counter(pub) "]";
  position: absolute;
  left: 0;
  top: 2px;
  font-family: var(--font-mono);
  font-size: .71rem;
  color: var(--muted);
}
.pub-authors { font-size: .855rem; line-height: 1.65; color: var(--text-soft); }
.pub-authors strong { color: var(--text); font-weight: 650; }
.pub-authors sup { font-size: .62em; color: var(--accent); }
.pub-title { margin-top: 5px; font-size: .95rem; font-weight: 400; color: var(--text); }
.pub-venue { margin-top: 4px; font-size: .83rem; font-style: italic; color: var(--muted); }
.pub-note {
  padding-top: 18px;
  border-top: 1px solid var(--border);
  font-size: .78rem;
  color: var(--muted);
}
.pub-note sup { margin-right: 3px; color: var(--accent); }

.entries { display: grid; }
.entry { padding: 28px 0; border-top: 1px solid var(--border); }
.entries > .entry:first-child { padding-top: 0; border-top: 0; }
.entry__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 6px 20px;
}
.entry__title { margin: 0; font-size: 1.02rem; font-weight: 650; max-width: 70ch; }
.entry__date {
  font-family: var(--font-mono);
  font-size: .69rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  white-space: nowrap;
  color: var(--muted);
}
.entry__org { margin-top: 5px; font-size: .91rem; line-height: 1.6; color: var(--accent); max-width: 78ch; }
.entry__desc { margin-top: 6px; font-size: .86rem; color: var(--muted); }
.entry__points { display: grid; gap: 9px; margin-top: 13px; max-width: 84ch; }
.entry__points li { position: relative; padding-left: 17px; font-size: .885rem; line-height: 1.7; color: var(--text-soft); }
.entry__points li::before {
  content: "";
  position: absolute;
  left: 1px;
  top: .72em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent-line);
}
.entries--compact .entry__title { font-size: .97rem; }

.awards { display: grid; }
.award {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 4px 24px;
  align-items: baseline;
  padding: 14px 0;
  border-top: 1px solid var(--border);
}
.awards > .award:first-child { border-top: 0; }
.award__text { font-size: .92rem; line-height: 1.6; color: var(--text-soft); }
.award__year {
  font-family: var(--font-mono);
  font-size: .69rem;
  letter-spacing: .1em;
  white-space: nowrap;
  color: var(--muted);
}

.contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 40px;
  align-items: start;
}

.contact__list { display: grid; gap: 26px; max-width: 620px; }
.contact__item { display: grid; gap: 9px; }
.contact__item + .contact__item { padding-top: 26px; border-top: 1px solid var(--border); }

.contact__mail {
  display: inline-block;
  font-family: var(--font-serif);
  font-size: clamp(1.25rem, 2.3vw, 1.75rem);
  line-height: 1.3;
  letter-spacing: -.005em;
  color: var(--text);
  border-bottom: 1px solid var(--accent-line);
  padding-bottom: 3px;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}
.contact__mail:hover { color: var(--accent); border-color: var(--accent); }

.contact__where {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .06em;
  color: var(--muted);
}

.contact__alt { margin-top: 14px; font-size: .92rem; }

.facts {
  display: grid;
  gap: 16px;
  padding: 26px 28px;
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  background: var(--surface);
}
.facts__row {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 18px;
  align-items: baseline;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}
.facts__row:last-child { padding-bottom: 0; border-bottom: 0; }
.facts dt {
  font-family: var(--font-mono);
  font-size: .67rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--muted);
}
.facts dd { font-size: .89rem; color: var(--text-soft); }
.facts dd a,
.ta-list a {
  color: var(--accent);
  border-bottom: 1px solid var(--accent-line);
  transition: border-color .2s var(--ease);
}
.facts dd a:hover,
.ta-list a:hover { border-color: var(--accent); }
.ta-list { display: grid; gap: 9px; }
.ta-list li { font-size: .89rem; line-height: 1.62; }

.footer {
  border-top: 1px solid var(--border);
  padding: 26px 0 46px;
}
.footer__inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .07em;
  color: var(--muted);
}
.footer__note { text-align: right; }

.js .reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .65s var(--ease), transform .65s var(--ease);
}
.js .reveal.is-visible { opacity: 1; transform: none; }

/* ---------- avatar lightbox ---------- */

body.is-locked { overflow: hidden; }

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 120;
  display: grid;
  place-items: center;
  padding: 32px;
  background: rgba(11, 15, 21, .74);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  animation: lightbox-in .22s var(--ease);
}
.lightbox[hidden] { display: none; }
.lightbox__img {
  width: min(76vw, 74vh, 540px);
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 50%;
  border: 5px solid rgba(255, 255, 255, .16);
  box-shadow: 0 30px 70px rgba(0, 0, 0, .45);
}
.lightbox__close {
  position: absolute;
  top: 22px;
  right: 24px;
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, .25);
  border-radius: 50%;
  background: rgba(255, 255, 255, .08);
  color: #fff;
  cursor: pointer;
  transition: background-color .2s var(--ease), border-color .2s var(--ease);
}
.lightbox__close svg { width: 18px; height: 18px; }
.lightbox__close:hover {
  background: rgba(255, 255, 255, .18);
  border-color: rgba(255, 255, 255, .45);
}

@keyframes lightbox-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ---------- responsive ---------- */

@media (max-width: 1180px) {
  .hero__grid { gap: 44px; }
  .wrap { padding: 0 40px; }
}

@media (min-width: 901px) and (max-height: 960px) {
  .sidebar { gap: 14px; padding: 30px 26px 18px; }
  .avatar { width: 98px; height: 98px; padding: 5px; }
  .identity { margin-top: 14px; }
  .identity__role { margin-top: 10px; }
  .nav { margin-top: 20px; }
  .nav a { padding: 5px 14px; font-size: .85rem; }
  .sidebar__foot { gap: 12px; }
  .sidebar__copy { padding-top: 11px; }
  .theme-toggle { padding: 7px 16px; }
  .lang-switch__btn { padding: 5px 12px; }
}

@media (min-width: 901px) and (max-height: 840px) {
  .sidebar { gap: 10px; padding: 22px 24px 14px; }
  .avatar { width: 80px; height: 80px; padding: 4px; }
  .identity { margin-top: 12px; }
  .identity__name { font-size: 1.15rem; }
  .identity__name-en { margin-top: 4px; }
  .identity__role { margin-top: 8px; font-size: .64rem; }
  .identity__affil { font-size: .68rem; line-height: 1.55; }
  .nav { margin-top: 14px; gap: 0; }
  .nav a { padding: 3px 14px; font-size: .82rem; }
  .sidebar__foot { gap: 8px; }
  .sidebar__copy { padding-top: 8px; font-size: .62rem; }
  .socials a { width: 30px; height: 30px; }
}

@media (min-width: 901px) and (max-height: 700px) {
  .sidebar { gap: 8px; }
  .sidebar__copy { display: none; }
}

@media (max-width: 1024px) {
  .hero { min-height: auto; padding: 88px 0 72px; }
  .hero__grid { grid-template-columns: minmax(0, 1fr); gap: 44px; }
  .figure { max-width: 520px; }
  .about-grid, .contact { grid-template-columns: minmax(0, 1fr); }
  .contact { gap: 34px; }
}

@media (max-width: 900px) {
  .sidebar {
    position: static;
    width: auto;
    gap: 18px;
    padding: 34px 24px 22px;
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }
  .main { margin-left: 0; }
  .wrap { padding: 0 24px; }
  .avatar { width: 94px; height: 94px; padding: 5px; }
  .identity { margin-top: 16px; }
  .identity__role { margin-top: 11px; }
  .nav {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    max-width: 480px;
    margin-top: 20px;
  }
  .nav a { padding: 7px 15px; font-size: .83rem; }
  .sidebar__foot { margin-top: 4px; }
  .sidebar__copy { border-top: 0; padding-top: 0; }
  .section { padding: 68px 0; }
  .section__head { margin-bottom: 34px; }
  .facts__row { grid-template-columns: minmax(0, 1fr); gap: 6px; }
}

@media (max-width: 560px) {
  body { font-size: 15.5px; }
  .sidebar__copy { display: none; }
  .eyebrow { font-size: .64rem; letter-spacing: .1em; gap: 9px; }
  .hero { padding: 56px 0 48px; }
  .hero__title { font-size: clamp(1.85rem, 8.4vw, 2.4rem); }
  .figure { padding: 16px; }
  .card { padding: 22px; }
  .timeline { padding-left: 22px; }
  .tl-item::before { left: -22px; }
  .btn { padding: 10px 20px; font-size: .83rem; }
  .footer__inner { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .btn, .card, .avatar { transition: none; }
}

@media print {
  .sidebar, .footer { display: none; }
  .main { margin-left: 0; }
  .section { padding: 24px 0; border-top: 0; }
  .reveal { opacity: 1; transform: none; }
}