:root {
  color-scheme: light dark;
  --background: #f8f9fa;
  --text: #212529;
  --muted: #5e646b;
  --border: #d9dde1;
  --button-background: #ffffff;
  --button-border: #a6aaae;
  --photo-background: #eef0f2;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--background);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
}

.container {
  width: 100%;
  max-width: 1024px;
  margin: 0 auto;
  padding: 0 20px;
}

a { color: inherit; text-decoration: underline; text-underline-offset: 3px; }
a.lab-link { text-decoration: none; }
a:focus-visible { outline: 2px solid currentColor; outline-offset: 4px; border-radius: 2px; }
p { margin: 0 0 12px; }
h1, h2, h3 { margin: 0; line-height: 1.3; }
h1, h2 { font-weight: 300; }
h1 { font-size: 40px; letter-spacing: -0.8px; }
h2 { font-size: 28px; }
h3 { font-size: 16px; font-weight: 600; }

html[lang="zh-Hans"] body {
  font-family: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
}
html[lang="zh-Hans"] h1 { letter-spacing: 0.06em; }
html[lang="zh-Hans"] .introduction p { line-height: 1.85; }

.skip-link {
  position: absolute;
  left: 16px;
  top: -80px;
  padding: 10px 16px;
  background: var(--button-background);
  z-index: 1;
}
.skip-link:focus { top: 10px; }

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
  margin: 32px 0 38px;
}
.identity p { margin: 8px 0 0; color: var(--muted); font-size: 15px; }
.contact-links { display: flex; flex-wrap: wrap; gap: 8px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  min-height: 42px;
  padding: 6px 13px;
  border: 1px solid var(--button-border);
  border-radius: 24px;
  background: var(--button-background);
  color: var(--text);
  line-height: 1.5;
  text-decoration: none;
}
.button:hover { background: var(--text); color: var(--background); text-decoration: none; }
.button svg { flex: 0 0 18px; width: 18px; height: 18px; }

.introduction {
  display: grid;
  grid-template-columns: 208px minmax(0, 1fr);
  align-items: start;
  gap: 26px;
  margin-bottom: 30px;
}
.profile-photo {
  display: block;
  width: 208px;
  height: 208px;
  border-radius: 0;
  background: var(--photo-background);
  object-fit: cover;
}
.introduction h2 { margin: 0 0 14px; padding: 0; border: 0; }
.intro-contact { font-size: 15px; }

main > section + section { margin-top: 32px; }
section > h2 {
  margin-bottom: 20px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
  scroll-margin-top: 24px;
}
.entry { margin-bottom: 22px; }
.entry:last-child { margin-bottom: 0; }
.entry p:last-child { margin-bottom: 0; }
.entry-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 3px 20px;
  margin-bottom: 5px;
}
.date {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  white-space: nowrap;
}
.entry-heading h3 { flex: 1 1 480px; }
.entry .advisor { margin-top: 12px; margin-bottom: 4px; }
.publication { margin-bottom: 28px; }
.publication h3 { font-size: 17px; line-height: 1.5; margin-bottom: 5px; }
.publication p { margin-bottom: 7px; }
.publication-status { color: var(--muted); font-size: 14px; }
.publication-status span { margin: 0 5px; }
.keywords { color: var(--muted); font-size: 14px; }
.keywords span { font-weight: 600; }
.awards-list { list-style: none; margin: 0; padding: 0; }
.awards-list li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 4px 20px;
  margin-bottom: 12px;
}
.award-result { color: var(--muted); font-size: 14px; text-align: right; flex-shrink: 0; }

footer {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 16px;
  margin: 48px 0 28px;
  padding: 0 24px;
  text-align: right;
  color: var(--muted);
  font-size: 13px;
}
footer p { margin: 0; }
footer span { margin: 0 5px; }
.personal-seal {
  flex: 0 0 auto;
  display: block;
  width: 88px;
  height: 88px;
  object-fit: contain;
  transform: rotate(-90deg);
}

@media (max-width: 800px) {
  .site-header { align-items: flex-start; }
  .entry-heading { display: block; }
  .date { margin-top: 4px; }
  .awards-list li { display: block; margin-bottom: 15px; }
  .award-result { display: block; text-align: left; margin-top: 2px; }
}

@media (max-width: 560px) {
  .container { padding: 0 20px; }
  .site-header { margin: 26px 0 30px; gap: 20px; }
  h1 { font-size: 36px; }
  h2 { font-size: 26px; }
  .identity p { font-size: 14px; }
  .contact-links { width: 100%; gap: 7px; }
  .language-switch { margin-left: auto; }
  .button { min-height: 44px; padding: 6px 8px; gap: 5px; font-size: 14px; }
  .button svg { flex-basis: 16px; width: 16px; height: 16px; }
  .introduction { display: block; }
  .profile-photo { float: left; width: 120px; height: 120px; margin: 3px 18px 10px 0; }
  .introduction::after { content: ""; display: block; clear: both; }
  .introduction h2 { margin-bottom: 12px; }
  .intro-contact { clear: both; padding-top: 2px; overflow-wrap: anywhere; }
  main > section + section { margin-top: 28px; }
  section > h2 { margin-bottom: 18px; }
  .publication h3 { font-size: 16px; }
  footer { margin-top: 36px; padding: 0 20px; }
  .personal-seal { width: 64px; height: 64px; }
}

@media (prefers-color-scheme: dark) {
  :root {
    --background: #1b1e1f;
    --text: #dedbd6;
    --muted: #b2b2b0;
    --border: #414547;
    --button-background: #242729;
    --button-border: #74797c;
    --photo-background: #272b2d;
  }
}

@media print {
  :root { color-scheme: light; --background: #fff; --text: #000; --muted: #444; --border: #ccc; }
  body { font-size: 11pt; }
  .container { max-width: none; padding: 0; }
  .site-header { margin-top: 0; }
  .contact-links, .profile-photo, .skip-link, footer { display: none; }
  .introduction { display: block; }
  .entry, .awards-list li { break-inside: avoid; }
  h2, h3 { break-after: avoid; }
}