:root {
  color-scheme: light dark;
  --background: light-dark(#f8f7f3, #151714);
  --background-raised: light-dark(#fdfcf8, #1d201b);
  --text: light-dark(#252721, #efeee7);
  --text-soft: light-dark(#555951, #bec2b7);
  --text-faint: light-dark(#6a7067, #9da49a);
  --line: light-dark(rgba(42, 46, 39, 0.13), rgba(232, 235, 226, 0.13));
  --line-strong: light-dark(#cccec6, #454a41);
  --indigo: light-dark(#2f4953, #e2eeeb);
  --indigo-soft: light-dark(#657a7e, #afc0bd);
  --teal: light-dark(#477472, #8bc0b6);
  --teal-wash: light-dark(rgba(79, 128, 121, 0.09), rgba(83, 145, 135, 0.075));
  --warm-wash: light-dark(rgba(173, 119, 102, 0.055), rgba(173, 119, 102, 0.035));
  --shadow: light-dark(rgba(31, 35, 29, 0.12), rgba(0, 0, 0, 0.3));
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

:root[data-theme="light"] {
  color-scheme: light;
}

:root[data-theme="dark"] {
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--background);
  scroll-behavior: smooth;
}

body {
  background: var(--background);
  color: var(--text);
  font-family: var(--sans);
  margin: 0;
  min-width: 300px;
}

button,
a,
summary {
  -webkit-tap-highlight-color: transparent;
}

a {
  color: inherit;
}

.skip-link {
  background: var(--text);
  color: var(--background);
  left: 16px;
  padding: 9px 12px;
  position: fixed;
  top: -64px;
  transition: top 150ms ease;
  z-index: 100;
}

.skip-link:focus {
  top: 12px;
}

.site-shell {
  display: flex;
  flex-direction: column;
  isolation: isolate;
  min-height: 100svh;
  overflow-x: clip;
  position: relative;
}

.site-shell::before {
  animation: ambient-drift 22s ease-in-out infinite alternate;
  background:
    radial-gradient(circle at 22% 47%, var(--teal-wash), transparent 28%),
    radial-gradient(circle at 78% 19%, var(--warm-wash), transparent 24%);
  content: "";
  inset: -14%;
  pointer-events: none;
  position: fixed;
  transform: translate3d(-0.6%, 0, 0) scale(1);
  z-index: -1;
}

.site-header {
  animation: settle-in 300ms 20ms cubic-bezier(0.22, 1, 0.36, 1) both;
  border-bottom: 1px solid var(--line);
  position: relative;
  z-index: 50;
}

.header-inner {
  align-items: center;
  display: flex;
  height: 68px;
  justify-content: space-between;
  margin: 0 auto;
  max-width: 1100px;
  padding: 0 38px;
}

.wordmark {
  align-items: center;
  color: var(--indigo);
  display: inline-flex;
  gap: 7px;
  height: 42px;
  text-decoration: none;
  transition: color 140ms ease;
}

.wordmark:hover,
.wordmark:focus-visible {
  color: var(--teal);
}

.wordmark-name {
  font-family: var(--serif);
  font-size: 16.5px;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1;
  white-space: nowrap;
}

.wordmark-cn {
  color: var(--text-faint);
  font-family: "Songti SC", STSong, "Noto Serif CJK SC", "Source Han Serif SC", serif;
  font-size: 10px;
  font-weight: 400;
  letter-spacing: 0.05em;
  line-height: 1;
  opacity: 0.62;
  white-space: nowrap;
}

.header-actions,
.primary-nav {
  align-items: center;
  display: flex;
}

.header-actions {
  gap: 18px;
}

.primary-nav {
  gap: 22px;
}

.primary-nav a,
.future-nav {
  color: var(--text-faint);
  font-size: 12px;
  line-height: 1;
  padding: 8px 0;
  position: relative;
  text-decoration: none;
}

.primary-nav a::after {
  background: var(--indigo);
  bottom: 2px;
  content: "";
  height: 1px;
  left: 0;
  position: absolute;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 160ms ease;
  width: 100%;
}

.primary-nav a:hover,
.primary-nav a:focus-visible,
.primary-nav a[aria-current="page"] {
  color: var(--indigo);
}

.primary-nav a:hover::after,
.primary-nav a:focus-visible::after,
.primary-nav a[aria-current="page"]::after {
  transform: scaleX(1);
  transform-origin: left;
}

.future-nav {
  cursor: default;
  opacity: 0.72;
}

.icon-button {
  align-items: center;
  background: transparent;
  border: 0;
  color: var(--text-faint);
  cursor: pointer;
  display: inline-flex;
  height: 40px;
  justify-content: center;
  padding: 0;
  width: 40px;
}

.icon-button:hover,
.icon-button:focus-visible {
  color: var(--indigo);
}

.icon-button svg {
  height: 18px;
  width: 18px;
}

.sun-icon,
.theme-toggle[aria-pressed="true"] .moon-icon {
  display: none;
}

.theme-toggle[aria-pressed="true"] .sun-icon {
  display: block;
}

.menu-toggle {
  display: none;
}

.hero {
  align-items: center;
  display: grid;
  flex: 1;
  gap: clamp(56px, 9vw, 112px);
  grid-template-columns: 246px minmax(0, 1fr);
  margin: 0 auto;
  max-width: 960px;
  min-height: 610px;
  padding: 72px 42px 78px;
  width: 100%;
}

.profile {
  align-items: center;
  animation: rise-in 460ms 45ms cubic-bezier(0.22, 1, 0.36, 1) both;
  display: flex;
  flex-direction: column;
  min-width: 0;
  position: relative;
  z-index: 10;
}

.portrait-frame {
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  box-shadow: 0 18px 42px light-dark(rgba(38, 50, 47, 0.08), rgba(0, 0, 0, 0.14));
  padding: 6px;
  position: relative;
  transition: box-shadow 350ms ease, transform 350ms cubic-bezier(0.22, 1, 0.36, 1);
}

.portrait-frame::after {
  border: 1px solid transparent;
  border-right-color: var(--teal);
  border-top-color: var(--teal);
  border-radius: 50%;
  content: "";
  inset: -7px;
  opacity: 0.38;
  pointer-events: none;
  position: absolute;
  transform: rotate(-18deg);
}

.portrait-frame:hover {
  box-shadow: 0 22px 50px light-dark(rgba(38, 50, 47, 0.12), rgba(0, 0, 0, 0.2));
}

.portrait {
  background: light-dark(#e5e9e7, #252a25);
  border-radius: 50%;
  display: block;
  height: 204px;
  object-fit: cover;
  width: 204px;
}

.social-links {
  align-items: center;
  display: flex;
  gap: 3px;
  justify-content: center;
  margin-top: 20px;
  position: relative;
}

.social-link {
  align-items: center;
  color: var(--text-soft);
  cursor: pointer;
  display: inline-flex;
  height: 40px;
  justify-content: center;
  list-style: none;
  opacity: 0.75;
  padding: 0;
  position: relative;
  text-decoration: none;
  transition: color 150ms ease, opacity 150ms ease, transform 150ms ease;
  width: 40px;
}

.social-link::after {
  background: var(--text);
  border-radius: 4px;
  bottom: -24px;
  color: var(--background);
  content: attr(data-label);
  font-size: 9px;
  left: 50%;
  letter-spacing: 0.02em;
  opacity: 0;
  padding: 4px 6px;
  pointer-events: none;
  position: absolute;
  transform: translate(-50%, -2px);
  transition: opacity 120ms ease, transform 120ms ease;
  white-space: nowrap;
  z-index: 4;
}

.social-link:hover,
.social-link:focus-visible,
.email-menu[open] .social-link {
  color: var(--indigo);
  opacity: 1;
  transform: translateY(-2px);
}

.social-link:hover::after,
.social-link:focus-visible::after {
  opacity: 1;
  transform: translate(-50%, 0);
}

.social-link svg {
  height: 20px;
  width: 20px;
}

.email-menu {
  position: relative;
}

.email-menu summary::-webkit-details-marker {
  display: none;
}

.email-panel {
  background: var(--background-raised);
  border: 1px solid var(--line-strong);
  border-radius: 11px;
  box-shadow: 0 17px 46px var(--shadow);
  left: -8px;
  min-width: 270px;
  padding: 8px;
  position: absolute;
  top: 45px;
  z-index: 20;
}

.email-menu[open] .email-panel {
  animation: panel-in 140ms ease-out both;
}

.email-row {
  border-radius: 7px;
  display: grid;
  gap: 3px;
  padding: 10px 11px;
  text-decoration: none;
  transition: background 140ms ease;
}

.email-row + .email-row {
  border-top: 1px solid var(--line);
  border-top-left-radius: 0;
  border-top-right-radius: 0;
}

.email-row:hover,
.email-row:focus-visible {
  background: light-dark(#efefe9, #292d27);
}

.email-kind {
  color: var(--indigo-soft);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.email-value {
  color: var(--text-soft);
  font-size: 12px;
}

.orcid-mark {
  align-items: center;
  border: 1.7px solid currentColor;
  border-radius: 50%;
  display: flex;
  font-size: 8px;
  font-weight: 650;
  height: 20px;
  justify-content: center;
  letter-spacing: -0.08em;
  width: 20px;
}

.affiliations {
  border-top: 1px solid var(--line);
  margin-top: 24px;
  padding-top: 17px;
  text-align: center;
  width: 100%;
}

.eyebrow {
  color: var(--text-faint);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.14em;
  margin: 0 0 8px;
  text-transform: uppercase;
}

.affiliations a {
  color: var(--text-soft);
  display: block;
  font-size: 11px;
  line-height: 1.6;
  text-decoration: none;
}

.affiliations a:hover,
.affiliations a:focus-visible {
  color: var(--indigo);
}

.introduction {
  animation: rise-in 500ms 85ms cubic-bezier(0.22, 1, 0.36, 1) both;
  max-width: 590px;
  min-width: 0;
  position: relative;
  z-index: 1;
}

.kicker {
  color: var(--teal);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.16em;
  margin: 0 0 16px;
  text-transform: uppercase;
}

h1 {
  color: var(--indigo);
  font-family: var(--serif);
  font-size: clamp(52px, 7vw, 74px);
  font-weight: 500;
  letter-spacing: -0.052em;
  line-height: 0.94;
  margin: 0 0 28px;
}

.preferred-name {
  color: var(--indigo-soft);
  font-family: var(--serif);
  font-size: 15px;
  letter-spacing: 0.02em;
  margin: -17px 0 25px;
}

.statement {
  color: var(--text-soft);
  font-size: 16px;
  line-height: 1.78;
  margin: 0;
  max-width: 570px;
}

.statement strong {
  color: var(--text);
  font-weight: 560;
}

.site-footer {
  align-items: center;
  border-top: 1px solid var(--line);
  color: var(--text-faint);
  display: flex;
  font-size: 10px;
  justify-content: space-between;
  letter-spacing: 0.025em;
  margin: 0 auto;
  max-width: 1100px;
  padding: 18px 38px 22px;
  width: 100%;
}

@keyframes ambient-drift {
  0% {
    transform: translate3d(-0.6%, 0, 0) scale(1);
  }

  100% {
    transform: translate3d(0.6%, -0.4%, 0) scale(1.018);
  }
}

@keyframes rise-in {
  from {
    opacity: 0.68;
    transform: translateY(6px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes panel-in {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

@keyframes settle-in {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

@media (max-width: 760px) {
  .header-inner {
    height: 62px;
    padding: 0 22px;
    position: relative;
  }

  .header-actions {
    gap: 0;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .primary-nav {
    align-items: stretch;
    background: var(--background-raised);
    border: 1px solid var(--line-strong);
    border-radius: 10px;
    box-shadow: 0 16px 44px var(--shadow);
    display: none;
    flex-direction: column;
    gap: 0;
    min-width: 174px;
    padding: 8px;
    position: absolute;
    right: 22px;
    top: 54px;
    z-index: 30;
  }

  .primary-nav[data-open="true"] {
    animation: menu-in 140ms ease-out both;
    display: flex;
  }

  .primary-nav a,
  .future-nav {
    border-radius: 6px;
    padding: 10px 11px;
  }

  .primary-nav a::after {
    display: none;
  }

  .future-nav {
    opacity: 0.58;
  }

  .hero {
    gap: 48px;
    grid-template-columns: 1fr;
    justify-items: center;
    min-height: 0;
    padding: 58px 25px 70px;
  }

  .profile {
    width: min(100%, 264px);
  }

  .portrait {
    height: 174px;
    width: 174px;
  }

  .email-panel {
    left: 50%;
    transform: translateX(-17%);
  }

  .introduction {
    text-align: center;
  }

  h1 {
    font-size: 54px;
    margin-bottom: 24px;
  }

  .statement {
    font-size: 15px;
    line-height: 1.72;
  }

  .site-footer {
    justify-content: center;
    padding: 18px 22px 22px;
  }

  .footer-note {
    display: none;
  }

  .site-shell::before {
    animation: none;
  }
}

@keyframes menu-in {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 480px) {
  .wordmark-cn {
    display: none;
  }
}

@media (max-width: 370px) {

  .email-panel {
    left: -4px;
    min-width: 258px;
    transform: none;
  }

  h1 {
    font-size: 49px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }

  .site-header,
  .profile,
  .introduction,
  .site-footer,
  .site-shell::before,
  .portrait-frame::after {
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
  }

}