:root {
  --page: #ffffff;
  --text: #1d2430;
  --muted: #66707d;
  --accent: #3b6090;
  --accent-dark: #23486f;
  --hairline: #d8dee6;
  --soft: #f5f7fa;
  --content-width: 62rem;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0 0 1.5rem;
  background: var(--page);
  color: var(--text);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 16px;
  line-height: 1.5;
}

a {
  color: var(--accent-dark);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.16em;
}

a:focus-visible,
.section-heading:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

p {
  margin: 0 0 0.8rem;
}

ul,
ol {
  margin-top: 0.35rem;
  margin-bottom: 0.9rem;
}

ul {
  list-style-type: square;
}

.skip-link {
  position: fixed;
  z-index: 10;
  top: 0.5rem;
  left: 0.5rem;
  padding: 0.45rem 0.7rem;
  background: var(--text);
  color: var(--page);
  transform: translateY(-180%);
}

.skip-link:focus {
  transform: translateY(0);
}

main {
  width: min(calc(100% - 2rem), var(--content-width));
  margin-inline: auto;
}

.intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 10rem;
  align-items: start;
  gap: clamp(2rem, 7vw, 5rem);
  padding: 2rem 0 1.7rem;
}

.eyebrow {
  margin-bottom: 0.2rem;
  color: var(--muted);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 0.78rem;
}

h1 {
  margin: 0 0 1rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid #aeb7c2;
  color: var(--accent);
  font-size: clamp(1.9rem, 4vw, 2.00rem);
  font-weight: 400;
  line-height: 1.15;
}

.chinese-name {
  margin-left: 0.28em;
  font-family: "Songti SC", "Noto Serif CJK SC", STSong, serif;
  font-size: 0.80em;
  white-space: nowrap;
}

.intro-text > p:not(.eyebrow) {
  max-width: 43rem;
}

.profile-photo {
  width: 10rem;
  margin: 0;
}

.profile-photo img {
  display: block;
  width: 100%;
  height: auto;
  padding: 0.22rem;
  border: 1px solid var(--hairline);
  background: var(--page);
}

.profile-photo-placeholder {
  display: grid;
  aspect-ratio: 4 / 5;
  place-items: center;
  border: 1px solid var(--hairline);
  background: var(--soft);
  color: var(--muted);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 0.75rem;
}

.section-heading {
  display: grid;
  grid-template-columns: 1rem minmax(0, 1fr);
  align-items: center;
  gap: 0.48rem;
  padding: 0;
  cursor: pointer;
  list-style: none;
}

.section-heading::-webkit-details-marker {
  display: none;
}

.section-heading h2 {
  margin: 0;
  padding: 0.72rem 0 0.22rem;
  color: var(--accent);
  font-size: 1.2rem;
  font-weight: 400;
  line-height: 1.2;
}

.section-heading:hover h2 {
  color: var(--accent-dark);
}

.toggle-icon {
  position: relative;
  width: 1rem;
  height: 1rem;
  margin-top: 0.52rem;
  color: var(--accent);
}

.toggle-icon::before,
.toggle-icon::after {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0.72rem;
  height: 1px;
  background: currentColor;
  content: "";
  transform: translate(-50%, -50%);
  transition: transform 150ms ease;
}

.toggle-icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.content-section[open] .toggle-icon::after {
  transform: translate(-50%, -50%) rotate(0deg);
}

.section-body {
  max-width: 54rem;
  padding: 0.8rem 0 1.25rem 1.48rem;
  animation: reveal-section 150ms ease-out;
}

.section-body > p:first-child {
  max-width: 48rem;
}

.topic-list {
  max-width: 46rem;
  padding-left: 1.15rem;
}

.topic-list li {
  break-inside: avoid;
  margin-bottom: 0.28rem;
  padding-left: 0.1rem;
}

.publication-list {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: publication;
}

.publication-list li {
  position: relative;
  padding: 0 0 0.5rem 2.0rem;
  counter-increment: publication;
}

.publication-list li::before {
  position: absolute;
  top: 0;
  left: 0;
  color: var(--muted);
  content: "[" counter(publication) "]";
}

.publication-list p {
  margin: 0;
}

.publication-list .venue {
  color: var(--muted);
  font-style: italic;
}

.more-link {
  margin-left: 2.35rem;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 0.8rem;
}

@keyframes reveal-section {
  from {
    opacity: 0;
    transform: translateY(-0.18rem);
  }
}

@media (max-width: 46rem) {
  .intro {
    grid-template-columns: minmax(0, 1fr) 8rem;
    gap: 1.5rem;
  }

  .profile-photo {
    width: 8rem;
  }
}

@media (max-width: 34rem) {
  main {
    width: min(calc(100% - 1.25rem), var(--content-width));
  }

  .intro {
    grid-template-columns: 1fr;
  }

  .profile-photo {
    width: 7.5rem;
    order: -1;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .section-body {
    animation: none;
  }

  .toggle-icon::before,
  .toggle-icon::after {
    transition: none;
  }
}

@media print {
  .toggle-icon {
    display: none;
  }

  .content-section:not([open]) > .section-body {
    display: block;
  }

  a {
    color: var(--text);
  }
}