:root {
  --bg-color: #ffffff;
  --text-color: #2d3748;
  --text-secondary: #4a5568;
  --accent-color: #2f6f9f;
  --accent-hover: #24577d;
  --border-color: #e2e8f0;
  --soft-bg: #f7fafc;
  --shadow-color: rgba(15, 23, 42, 0.07);
  --transition-time: 0.2s;
}

* {
  box-sizing: border-box;
  min-width: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  width: 100%;
  max-width: 880px;
  margin: 0 auto;
  padding: 1.5rem;
  background: var(--bg-color);
  color: var(--text-color);
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 300;
  line-height: 1.62;
  overflow-x: hidden;
  overflow-wrap: break-word;
}

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

a:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  margin-bottom: 1.2rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--border-color);
}

.header-content {
  flex: 1;
  min-width: 0;
}

h1 {
  margin: 0 0 0.25rem;
  color: #1a202c;
  font-size: 2.35rem;
  font-weight: 500;
  letter-spacing: 0;
  line-height: 1.15;
}

.subtitle {
  margin: 0.2rem 0 1rem;
  color: var(--text-secondary);
  font-size: 1rem;
}

.header-image img {
  width: 170px;
  height: 190px;
  object-fit: cover;
  object-position: 42% 83%;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  box-shadow: 0 6px 18px var(--shadow-color);
}

.social-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.social-links a,
.toggle-button {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0.35rem 0.65rem;
  border: 1px solid transparent;
  border-radius: 4px;
  background: rgba(47, 111, 159, 0.08);
  color: var(--accent-color);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.9rem;
  font-weight: 500;
  transition: background var(--transition-time) ease, color var(--transition-time) ease, transform var(--transition-time) ease;
}

.social-links a:hover,
.toggle-button:hover {
  background: var(--accent-color);
  color: #ffffff;
  text-decoration: none;
  transform: translateY(-1px);
}

.page-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
  margin: 0 0 1.1rem;
  padding-bottom: 0.8rem;
  border-bottom: 1px solid var(--border-color);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.94rem;
}

.page-nav a {
  color: var(--text-secondary);
}

.page-nav a:hover {
  color: var(--accent-color);
}

main {
  width: 100%;
}

section {
  width: 100%;
  margin-bottom: 2rem;
  scroll-margin-top: 1rem;
}

h2 {
  margin: 1.6rem 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
  color: #1a202c;
  font-size: 1.38rem;
  font-weight: 500;
  letter-spacing: 0;
  line-height: 1.25;
}

p {
  margin: 0 0 0.85rem;
  overflow-wrap: break-word;
}

ul {
  margin-top: 0.4rem;
  padding-left: 1.3rem;
}

li {
  margin-bottom: 0.35rem;
}

.news-container {
  max-height: none;
  overflow-y: visible;
  padding-right: 0.5rem;
}

.news-container.is-expanded {
  max-height: 18rem;
  overflow-y: auto;
}

.news-list {
  margin: 0;
  padding-left: 1.1rem;
}

.news-list li {
  display: grid;
  grid-template-columns: 8.5rem minmax(0, 1fr);
  column-gap: 0.8rem;
  align-items: start;
  margin-bottom: 0.55rem;
}

.news-list li[hidden] {
  display: none;
}

.news-container:not(.is-expanded) .news-list li:nth-child(n + 4) {
  display: none;
}

.news-text {
  min-width: 0;
  overflow-wrap: break-word;
}

.date,
.entry-date,
.award-year {
  display: inline-block;
  min-width: 8.5rem;
  color: var(--text-secondary);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.88rem;
  font-weight: 600;
}

.section-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.section-row h2 {
  margin-bottom: 0;
  border-bottom: 0;
}

.toggle-button {
  border: 0;
  cursor: pointer;
}

.publication-item {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.2rem;
  padding: 0.9rem 0;
  transition: transform var(--transition-time) ease;
}

.publication-item:hover {
  transform: translateX(3px);
}

.pub-year {
  flex: 0 0 4rem;
  color: var(--text-secondary);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-weight: 700;
}

.pub-content {
  flex: 1;
}

.pub-title-line {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.25rem;
}

.pub-title {
  flex: 1;
  color: #1a202c;
  font-weight: 600;
  overflow-wrap: anywhere;
}

.pub-authors,
.pub-venue,
.pub-description {
  margin-bottom: 0.3rem;
  color: var(--text-secondary);
  font-size: 0.94rem;
}

.pub-venue {
  font-style: italic;
  text-align: right;
}

.highlight-name {
  color: var(--accent-color);
  font-weight: 600;
}

.pub-title-links {
  display: flex;
  flex: 0 0 auto;
  gap: 0.35rem;
}

.pub-icon-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.55rem;
  height: 1.55rem;
  border-radius: 4px;
  background: var(--soft-bg);
}

.pub-icon-link svg {
  width: 0.95rem;
  height: 0.95rem;
  fill: currentColor;
}

.footnote {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.section-note {
  color: var(--text-secondary);
  font-size: 0.82rem;
  text-align: right;
}

.publication-controls {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  margin-left: auto;
}

.bio-education {
  margin-top: 0.95rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 0.94rem;
}

.bio-education div {
  display: flex;
  gap: 0.8rem;
  margin-bottom: 0.3rem;
}

.bio-education .bio-education-title {
  display: block;
  margin-bottom: 0.45rem;
  color: #1a202c;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.9rem;
  font-weight: 700;
}

.bio-education span {
  flex: 0 0 6.7rem;
  color: #3f4d61;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-weight: 600;
}

.entry,
.award-item {
  display: flex;
  gap: 1rem;
  margin-bottom: 1rem;
  transition: transform var(--transition-time) ease;
}

.entry:hover,
.award-item:hover {
  transform: translateX(3px);
}

.entry p {
  margin: 0.2rem 0 0;
  color: var(--text-secondary);
}

.entry strong {
  font-weight: 700;
}

.service-subsection {
  margin-bottom: 1.15rem;
}

.service-subsection:last-child {
  margin-bottom: 0;
}

.service-subsection h3 {
  margin: 0 0 0.45rem;
  color: #1a202c;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.94rem;
  font-weight: 600;
}

.service-subsection p {
  margin-bottom: 0;
}

.teaching-courses {
  display: grid;
  gap: 0.55rem;
}

.internship-item {
  display: grid;
  grid-template-columns: 8.5rem minmax(0, 1fr);
  gap: 1rem;
  margin-bottom: 1.45rem;
}

.internship-date {
  color: var(--text-secondary);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.88rem;
  font-weight: 600;
}

.internship-item strong {
  display: block;
  font-weight: 700;
}

.internship-item p {
  margin: 0.2rem 0 0;
  color: var(--text-secondary);
}

footer {
  margin-top: 2.25rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 0.9rem;
  text-align: center;
}

@media (max-width: 680px) {
  html,
  body {
    overflow-x: hidden;
  }

  body {
    width: auto;
    max-width: none;
    padding: 1rem;
  }

  .page-header,
  main,
  section,
  p,
  ul,
  li,
  .header-content {
    max-width: 100%;
  }

  .subtitle,
  .pub-authors,
  .pub-description,
  li {
    overflow-wrap: anywhere;
  }

  .page-header {
    align-items: flex-start;
    flex-direction: column-reverse;
    gap: 1rem;
  }

  .header-image img {
    width: 160px;
    height: 180px;
  }

  h1 {
    font-size: 2rem;
  }

  .page-nav {
    gap: 0.75rem;
    flex-wrap: wrap;
    overflow-x: visible;
    padding-bottom: 0.2rem;
  }

  .news-list {
    padding-left: 0;
  }

  .news-list li {
    grid-template-columns: 5.4rem minmax(0, 1fr);
  }

  .section-row {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.3rem;
    padding-bottom: 0.5rem;
  }

  .publication-controls {
    width: 100%;
    justify-content: space-between;
    margin-left: 0;
  }

  .publication-item,
  .entry,
  .award-item {
    display: block;
  }

  .internship-item {
    display: block;
  }

  .publication-item:hover,
  .entry:hover,
  .award-item:hover {
    transform: none;
  }

  .pub-year,
  .entry-date,
  .award-year {
    display: block;
    min-width: 0;
    margin-bottom: 0.25rem;
  }
}

@media print {
  body {
    max-width: none;
    padding: 0;
  }

  .page-nav,
  .toggle-button {
    display: none;
  }
}