:root {
  --bg: #ffffff;
  --text: #202124;
  --muted: #555f6b;
  --soft: #747b84;
  --line: #d8dde3;
  --line-soft: #edf0f3;
  --link: #1772a8;
  --link-hover: #0e4f78;
  --tint: #f6fafc;
  --content-width: 980px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 16px;
  line-height: 1.52;
}

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

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

.skip-link {
  position: absolute;
  top: -44px;
  left: 14px;
  padding: 7px 10px;
  background: #111;
  color: #fff;
  z-index: 10;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 8;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  width: min(var(--content-width), calc(100% - 42px));
  margin: 0 auto;
  padding: 22px 0 18px;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.94);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

.site-name {
  color: var(--text);
  font-size: 18px;
  font-weight: 700;
  white-space: nowrap;
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 15px;
  font-size: 14px;
}

.nav-list a {
  color: #333940;
}

.nav-list a.is-active {
  color: var(--link-hover);
  font-weight: 700;
}

.content,
.site-footer {
  width: min(var(--content-width), calc(100% - 42px));
  margin: 0 auto;
}

.home-section {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 34px;
  align-items: start;
  padding: 34px 0 30px;
  scroll-margin-top: 20px;
}

.avatar {
  display: block;
  width: 240px;
  height: 240px;
  object-fit: cover;
  border-radius: 4px;
  border: 1px solid var(--line);
}

h1 {
  margin: 0 0 10px;
  font-size: 34px;
  line-height: 1.15;
  letter-spacing: 0;
}

.profile-line {
  margin: 0 0 16px;
  color: var(--muted);
  font-size: 16px;
}

.prose p {
  margin: 0 0 10px;
}

.collaboration-line {
  margin: 15px 0 12px;
  padding: 12px 14px;
  border: 1px solid #cddde6;
  border-left: 4px solid #367b9f;
  border-radius: 4px;
  background: #f7fafc;
  color: #354f5f;
  font-size: 15px;
  line-height: 1.45;
}

.profile-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  margin: 13px 0 0;
  color: var(--soft);
}

.profile-links a,
.email-link,
.pub-links a,
.subtle-link {
  color: var(--link);
  font-size: 15px;
}

.icon-link,
.pub-links a {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  white-space: nowrap;
}

.inline-icon {
  display: inline-flex;
  width: 16px;
  height: 16px;
  color: currentColor;
  vertical-align: -3px;
}

.inline-icon svg {
  width: 100%;
  height: 100%;
}

.wechat-contact {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.wechat-trigger {
  appearance: none;
  margin: 0;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--link);
  font: inherit;
  font-size: 15px;
  line-height: inherit;
  cursor: pointer;
}

.wechat-trigger:hover {
  color: var(--link-hover);
  text-decoration: underline;
}

.wechat-trigger:focus-visible,
.wechat-close:focus-visible,
.wechat-image-link:focus-visible {
  outline: 2px solid var(--link);
  outline-offset: 3px;
}

.wechat-trigger:active {
  transform: translateY(1px);
}

.wechat-qr-card {
  position: absolute;
  top: calc(100% + 12px);
  right: 0;
  z-index: 4;
  display: block;
  width: min(280px, calc(100vw - 34px));
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 14px 34px rgba(25, 49, 68, 0.16);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-5px);
  transition: opacity 180ms ease, transform 180ms ease, visibility 180ms ease;
}

.wechat-qr-card::before {
  content: "";
  position: absolute;
  top: -6px;
  right: 24px;
  width: 10px;
  height: 10px;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
  background: #fff;
  transform: rotate(45deg);
}

.wechat-contact:hover .wechat-qr-card,
.wechat-contact.is-open .wechat-qr-card {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.wechat-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
  color: var(--text);
  font-size: 14px;
}

.wechat-close {
  display: inline-grid;
  width: 26px;
  height: 26px;
  padding: 0;
  border: 0;
  border-radius: 4px;
  background: #f1f4f6;
  color: #46515c;
  font: inherit;
  font-size: 21px;
  line-height: 1;
  place-items: center;
  cursor: pointer;
}

.wechat-close:hover {
  background: #e5eaee;
}

.wechat-image-link,
.wechat-image-link img {
  display: block;
  width: 100%;
}

.wechat-image-link {
  overflow: hidden;
  border: 1px solid var(--line-soft);
  border-radius: 5px;
  background: #fff;
}

.wechat-image-link img {
  height: auto;
}

.wechat-qr-card small {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 12px;
  line-height: 1.35;
  text-align: center;
}

.slash-separator {
  display: inline-block;
  margin: 0 8px;
  color: var(--soft);
}

.section {
  padding: 10px 0 28px;
  scroll-margin-top: 88px;
}

h2 {
  margin: 0 0 12px;
  padding-top: 8px;
  border-top: 1px solid var(--line);
  color: var(--text);
  font-size: 20px;
  line-height: 1.25;
  letter-spacing: 0;
}

h3 {
  margin: 20px 0 8px;
  font-size: 17px;
  line-height: 1.25;
}

.section-heading-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  border-top: 1px solid var(--line);
  padding-top: 8px;
  margin-bottom: 12px;
}

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

.subtle-link {
  white-space: nowrap;
}

.timeline {
  display: block;
}

.year-block {
  margin: 0 0 12px;
}

.year-label {
  margin: 6px 0 4px;
  font-weight: 700;
}

.news-list,
.simple-list {
  margin: 0;
  padding-left: 22px;
}

.news-list li,
.simple-list li {
  margin-bottom: 4px;
}

.news-emphasis {
  color: #a3433d;
  font-size: 0.96em;
  font-weight: 400;
}

.news-emphasis a {
  color: inherit;
}

.news-archive {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 320ms ease, opacity 220ms ease;
}

.news-archive.is-open {
  opacity: 1;
}

.news-toggle,
.publications-toggle {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin: 8px 0 0;
  padding: 4px 0;
  border: 0;
  border-bottom: 1px solid transparent;
  background: transparent;
  color: var(--link);
  font: inherit;
  font-size: 14px;
  cursor: pointer;
}

.news-toggle:hover,
.publications-toggle:hover {
  border-bottom-color: currentColor;
  color: var(--link-hover);
}

.news-toggle:focus-visible,
.publications-toggle:focus-visible {
  outline: 2px solid var(--link);
  outline-offset: 4px;
}

.news-toggle-arrow {
  display: inline-block;
  transition: transform 220ms ease;
}

.news-toggle[aria-expanded="true"] .news-toggle-arrow,
.publications-archive[open] > summary .news-toggle-arrow {
  transform: rotate(180deg);
}

.publications-toggle {
  margin-top: 16px;
  list-style: none;
}

.publications-toggle::-webkit-details-marker {
  display: none;
}

.publication[id],
.compact-list > li[id] {
  scroll-margin-top: 88px;
}

.date-tag {
  color: #333940;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 14px;
}

.research-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 14px;
  margin-top: 8px;
}

.research-section h2 {
  font-size: 18px;
  margin-bottom: 8px;
}

.research-item {
  min-height: 82px;
  padding: 12px 14px 11px;
  border: 1px solid var(--line-soft);
  border-radius: 6px;
  background: #fafcfd;
}

.research-item h3 {
  margin: 0 0 3px;
  color: var(--text);
  font-size: 17px;
  line-height: 1.25;
}

.research-item p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.36;
}

.research-papers {
  display: flex;
  flex-wrap: wrap;
  gap: 3px 0;
  margin-top: 8px;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 12px;
  line-height: 1.35;
}

.research-paper-link {
  white-space: nowrap;
}

.research-paper-link:not(:last-child)::after {
  content: "·";
  margin: 0 7px;
  color: #a5adb5;
}

.publication-list {
  display: block;
}

.publication {
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  gap: 20px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.publication:first-child {
  padding-top: 4px;
}

.pub-image {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid #d9dee4;
  border-radius: 2px;
  background: #ffffff;
  box-shadow: 0 1px 2px rgba(31, 45, 61, 0.08);
}

.pub-title {
  margin: 3px 0 5px;
  color: var(--text);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.35;
}

.pub-authors,
.pub-venue,
.pub-note,
.pub-contribution {
  margin: 0 0 4px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.42;
}

.pub-authors strong {
  color: var(--text);
}

.pub-note {
  color: #b32020;
  font-weight: 700;
  font-size: 14px;
}

.pub-contribution {
  display: inline-block;
  margin: 2px 0 5px;
  padding: 2px 7px;
  border: 1px solid #cadce7;
  border-radius: 4px;
  background: #f5fafc;
  color: #1d5674;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 12px;
  font-weight: 700;
}

.pub-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  margin-top: 6px;
}

.pub-links a:not(:last-child)::after {
  content: "/";
  margin: 0 8px;
  color: var(--soft);
}

.subsection-title {
  margin-top: 24px;
  padding-top: 8px;
  border-top: 1px solid var(--line);
}

.compact-list {
  margin: 6px 0 0;
  padding-left: 22px;
}

.compact-list li {
  margin-bottom: 8px;
  font-size: 14px;
  line-height: 1.42;
}

.compact-publication {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  margin: 10px 0 12px;
}

.compact-image {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid #d9dee4;
  border-radius: 2px;
  background: #ffffff;
  box-shadow: 0 1px 2px rgba(31, 45, 61, 0.08);
}

.compact-title {
  display: inline;
  font-weight: 400;
}

.compact-meta {
  display: inline;
  color: var(--muted);
  font-size: 13px;
}

.compact-title + .compact-meta::before {
  content: ". ";
}

.compact-links {
  display: inline;
  margin-left: 6px;
  font-size: 13px;
}

.compact-links a:not(:last-child)::after {
  content: "/";
  margin: 0 8px;
  color: var(--soft);
}

.entry-list {
  display: block;
}

.entry {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 18px;
  padding: 10px 0;
  border-bottom: 1px solid #eef1f4;
}

.entry-main {
  display: grid;
  grid-template-columns: 78px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
}

.entry-logo {
  display: block;
  width: 78px;
  height: 56px;
  padding: 5px;
  border: 1px solid var(--line-soft);
  border-radius: 4px;
  background: #fff;
  object-fit: contain;
}

.entry-copy {
  min-width: 0;
}

.entry-period {
  color: var(--muted);
  font-size: 15px;
}

.entry h3 {
  margin: 0 0 3px;
  font-size: 17px;
}

.entry p {
  margin: 0 0 3px;
  color: var(--muted);
  font-size: 15px;
}

.entry .entry-summary {
  margin-top: 7px;
  color: #43515e;
  font-size: 14px;
}

#service-content h3 {
  margin-top: 14px;
}

.site-footer {
  padding: 18px 0 36px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

.footer-widgets {
  margin-bottom: 16px;
}

.visitor-map-widget {
  width: 100%;
  max-width: 280px;
}

.footer-widget {
  min-width: 0;
  padding: 14px 16px;
  border: 1px solid var(--line-soft);
  border-radius: 6px;
  background: #fafcfd;
}

.footer-widget-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 11px;
}

.footer-widget h2 {
  margin: 0;
  padding: 0;
  border: 0;
  font-size: 15px;
}

.footer-widget-kicker {
  color: var(--soft);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 11px;
  white-space: nowrap;
}

.visitor-map-embed {
  min-height: 150px;
  overflow: hidden;
  border-radius: 4px;
  background: #edf3f7;
}

.visitor-map-embed #mapmyvisitors-widget {
  max-width: 100% !important;
}

.visitor-map-embed noscript,
.visitor-map-embed noscript a,
.visitor-map-embed noscript img {
  display: block;
}

.visitor-map-embed noscript img {
  width: 100%;
  height: auto;
}

.footer-widget-note {
  margin: 7px 0 0;
  color: var(--soft);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 11px;
  line-height: 1.4;
}

.footer-meta {
  margin: 0;
}

@media (max-width: 760px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
    padding-top: 14px;
    padding-bottom: 10px;
  }

  .nav-list {
    width: 100%;
    flex-wrap: nowrap;
    justify-content: flex-start;
    gap: 14px;
    overflow-x: auto;
    padding-bottom: 4px;
    scrollbar-width: none;
  }

  .nav-list::-webkit-scrollbar {
    display: none;
  }

  .home-section {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .avatar {
    width: 190px;
    height: 190px;
  }

  .research-item,
  .publication,
  .compact-publication,
  .entry {
    grid-template-columns: 1fr;
  }

  .research-list {
    grid-template-columns: 1fr;
  }

  .entry-main {
    grid-template-columns: 68px minmax(0, 1fr);
    gap: 12px;
  }

  .entry-logo {
    width: 68px;
    height: 50px;
  }

  .publication {
    gap: 10px;
  }

  .pub-image {
    max-width: 360px;
  }

  .compact-image {
    max-width: 300px;
  }

  .visitor-map-widget {
    max-width: 280px;
  }

  .visitor-map-embed {
    min-height: 150px;
  }

  .wechat-qr-card {
    position: fixed;
    top: 50%;
    right: auto;
    left: 50%;
    max-height: 86dvh;
    overflow-y: auto;
    transform: translate(-50%, calc(-50% - 5px));
  }

  .wechat-contact:hover .wechat-qr-card,
  .wechat-contact.is-open .wechat-qr-card {
    transform: translate(-50%, -50%);
  }

  .wechat-qr-card::before {
    display: none;
  }
}