:root {
  color-scheme: light dark;
  --white: #ffffff;
  --black: #000000;
  --gray-950: #111111;
  --gray-800: #1d1d1f;
  --gray-700: #424245;
  --gray-500: #86868b;
  --gray-300: #d2d2d7;
  --gray-100: #f5f5f7;
  --section-rule: #d2d2d7;
  --item-rule: #e5e5e7;
  --nav-bg: rgba(255, 255, 255, 0.82);
  --toggle-bg: #f5f5f7;
  --toggle-border: #d2d2d7;
  --map-water: #eef2f3;
  --map-region: #dedee3;
  --map-region-soft: #e8e8ed;
  --map-line: #ffffff;
  --map-visited: #2f7d6d;
  --map-visited-line: #1f5d52;
  --map-graticule: rgba(134, 134, 139, 0.13);
  --measure: 1120px;
}

[data-theme="dark"] {
  --white: #0b0b0d;
  --black: #f5f5f7;
  --gray-950: #f5f5f7;
  --gray-800: #e8e8ed;
  --gray-700: #c7c7cc;
  --gray-500: #8e8e93;
  --gray-300: #2c2c2e;
  --gray-100: #151517;
  --section-rule: #3a3a3c;
  --item-rule: #2c2c2e;
  --nav-bg: rgba(11, 11, 13, 0.82);
  --toggle-bg: #151517;
  --toggle-border: #3a3a3c;
  --map-water: #111113;
  --map-region: #2c2c2e;
  --map-region-soft: #242426;
  --map-line: #151517;
  --map-visited: #63b69f;
  --map-visited-line: #83d0bd;
  --map-graticule: rgba(142, 142, 147, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--white);
  color: var(--gray-800);
  font-family: ui-monospace, "SFMono-Regular", "SF Mono", "Cascadia Mono", "Roboto Mono", "Liberation Mono", Menlo, Consolas, monospace;
  font-size: 15px;
  line-height: 1.48;
  font-variant-numeric: tabular-nums;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

section {
  scroll-margin-top: 28px;
}

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

a:hover {
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.theme-toggle {
  position: fixed;
  top: 18px;
  right: 22px;
  z-index: 30;
  display: inline-grid;
  place-items: center;
  width: 32px;
  height: 32px;
  padding: 0;
  border: 1px solid var(--toggle-border);
  border-radius: 999px;
  background: var(--toggle-bg);
  color: var(--black);
  font-size: 13px;
  line-height: 1;
  cursor: pointer;
}

.theme-toggle:hover {
  border-color: var(--gray-500);
}

.theme-icon {
  grid-area: 1 / 1;
}

.theme-icon-sun {
  display: none;
}

[data-theme="dark"] .theme-icon-moon {
  display: none;
}

[data-theme="dark"] .theme-icon-sun {
  display: inline-block;
}

.page {
  width: min(calc(100% - 40px), var(--measure));
  margin: 0 auto;
  padding: 36px 0 96px;
}

.section-nav {
  position: fixed;
  top: 50%;
  left: max(20px, calc((100vw - var(--measure)) / 2 - 118px));
  z-index: 10;
  display: grid;
  gap: 8px;
  transform: translateY(-50%);
}

.section-nav a {
  display: block;
  width: fit-content;
  padding: 5px 9px;
  border: 1px solid transparent;
  border-radius: 999px;
  color: var(--gray-500);
  font-size: 12px;
  line-height: 1.2;
  background: var(--nav-bg);
  backdrop-filter: blur(12px);
}

.section-nav a:hover {
  border-color: var(--gray-300);
  color: var(--black);
  text-decoration: none;
}

.section-nav a[aria-current="location"] {
  border-color: var(--gray-500);
  background: var(--toggle-bg);
  color: var(--black);
  text-decoration: none;
}

.hero {
  padding: 0 0 22px;
  border-bottom: 1px solid var(--section-rule);
}

h1 {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  column-gap: 0.18em;
  row-gap: 0.08em;
  margin: 0;
  color: var(--black);
  font-family: Arial, "Helvetica Neue", Helvetica, sans-serif;
  font-size: 38px;
  font-weight: 600;
  letter-spacing: 0.02em;
  line-height: 1.08;
}

.title-word {
  display: inline-flex;
  align-items: baseline;
  transform: scaleX(0.92);
  transform-origin: left center;
}

.title-initial {
  font-size: 1em;
  line-height: 1;
}

.title-small {
  font-size: 0.74em;
  letter-spacing: 0.07em;
  line-height: 1;
  text-transform: uppercase;
}

.contact-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
}

.contact-list li {
  min-height: 18px;
  color: var(--gray-700);
  font-size: 13.5px;
  line-height: 1.25;
}

.contact-list a,
.contact-list span {
  color: var(--black);
}

.icon-pad-right {
  margin-right: 5px;
  color: var(--gray-800);
  font-size: 0.95em;
  vertical-align: -0.03em;
}

.section {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 42px;
  padding: 28px 0;
  border-bottom: 1px solid var(--section-rule);
}

.section-label {
  position: sticky;
  top: 24px;
  align-self: start;
}

.section-label span {
  display: block;
  margin-bottom: 4px;
  color: var(--gray-500);
  font-size: 12px;
}

h2 {
  margin: 0;
  color: var(--black);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.25;
}

h3 {
  margin: 0;
  color: var(--black);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.35;
}

.paper-title-row {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.paper-title-row h3 {
  min-width: 0;
}

p {
  margin: 4px 0 0;
}

.venue,
.authors {
  color: var(--gray-700);
}

.authors {
  font-weight: 400;
}

.section-content,
.publication-list {
  min-width: 0;
}

.timeline-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 190px;
  gap: 24px;
  padding: 0 0 16px;
}

.timeline-item + .timeline-item {
  padding-top: 16px;
  border-top: 1px solid var(--item-rule);
}

.timeline-item time,
.publication-list time {
  color: var(--gray-500);
}

.timeline-item time {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

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

.publication-list li {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 18px;
  padding: 0 0 14px;
}

.publication-list li + li {
  padding-top: 14px;
  border-top: 1px solid var(--item-rule);
}

.github-link,
.eprint-link {
  display: inline-flex;
  align-items: center;
  color: var(--gray-700);
  flex: 0 0 auto;
  line-height: 1.35;
}

.github-link {
  font-size: 15px;
}

.eprint-link {
  font-size: 12px;
}

.github-link:hover {
  color: var(--black);
  text-decoration: none;
}

.eprint-link:hover {
  color: var(--black);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.plain-list {
  display: grid;
  gap: 5px;
  margin: 6px 0 0;
  padding: 0;
  list-style: none;
}

.plain-list li {
  position: relative;
  padding-left: 18px;
}

.plain-list li::before {
  position: absolute;
  left: 0;
  content: "-";
  color: var(--gray-500);
}

.term-list {
  display: grid;
  gap: 2px;
  justify-items: end;
  white-space: nowrap;
}

.footprint-page {
  width: min(calc(100% - 32px), 1440px);
  min-height: calc(100svh - 33px);
  padding: 26px 0 48px;
}

.footprint-hero {
  padding-bottom: 18px;
  border-bottom: 0;
}

.footprint-map-shell {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--section-rule);
  border-radius: 8px;
  background: var(--map-water);
  touch-action: none;
  overscroll-behavior: contain;
}

.footprint-map {
  display: block;
  width: 100%;
  height: min(calc(100svh - 156px), 720px);
  min-height: 460px;
  background: var(--map-water);
  cursor: grab;
  touch-action: none;
  user-select: none;
}

.footprint-map.is-dragging {
  cursor: grabbing;
}

.footprint-graticule {
  fill: none;
  stroke: var(--map-graticule);
  stroke-width: 0.5;
  vector-effect: non-scaling-stroke;
}

.footprint-region {
  fill: var(--map-region);
  stroke: var(--map-line);
  stroke-width: 0.65;
  vector-effect: non-scaling-stroke;
  transition: fill 160ms ease, opacity 160ms ease;
}

.footprint-region:hover,
.footprint-region:focus {
  fill: var(--map-region-soft);
  outline: none;
}

.footprint-region.is-visited {
  fill: var(--map-visited);
  stroke: var(--map-visited-line);
}

.footprint-region.is-visited:hover,
.footprint-region.is-visited:focus {
  fill: var(--map-visited);
}

.footprint-map.is-detail-zoom .footprint-region {
  fill-opacity: 0.62;
}

.footprint-map.is-detail-zoom .footprint-region.is-visited {
  fill-opacity: 0.34;
}

.footprint-map.is-detail-zoom .footprint-region:hover,
.footprint-map.is-detail-zoom .footprint-region:focus {
  fill-opacity: 0.68;
}

.footprint-region.is-microstate {
  stroke-width: 1.15;
}

.footprint-province {
  stroke-width: 0.45;
}

.footprint-china-layer {
  opacity: 0;
  pointer-events: none;
}

.footprint-map.is-china-detail .footprint-china-layer {
  opacity: 1;
  pointer-events: auto;
}

.footprint-map.is-china-detail .footprint-country.is-china-country {
  fill: var(--map-region-soft);
}

.map-tooltip {
  position: absolute;
  z-index: 3;
  max-width: min(220px, calc(100% - 24px));
  padding: 5px 7px;
  border: 1px solid var(--gray-300);
  border-radius: 6px;
  background: var(--nav-bg);
  color: var(--black);
  font-size: 12px;
  line-height: 1.25;
  pointer-events: none;
  backdrop-filter: blur(12px);
}

.map-controls {
  position: absolute;
  right: 12px;
  bottom: 12px;
  z-index: 2;
  display: grid;
  gap: 6px;
}

.map-controls button {
  display: inline-grid;
  place-items: center;
  width: 30px;
  height: 30px;
  padding: 0;
  border: 1px solid var(--gray-300);
  border-radius: 999px;
  background: var(--nav-bg);
  color: var(--gray-700);
  font-size: 11px;
  line-height: 1;
  cursor: pointer;
  backdrop-filter: blur(12px);
}

.map-controls button:hover {
  border-color: var(--gray-500);
  color: var(--black);
}

.site-footer {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 20;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 9px max(20px, calc((100vw - var(--measure)) / 2)) 10px;
  border-top: 1px solid var(--gray-300);
  background: var(--nav-bg);
  color: var(--gray-500);
  font-size: 12px;
  line-height: 1.2;
  backdrop-filter: blur(12px);
}

.site-footer a {
  color: var(--gray-700);
}

.site-footer a:hover {
  color: var(--black);
}

@media (max-width: 1260px) {
  .section-nav {
    position: sticky;
    top: 0;
    display: flex;
    flex-wrap: nowrap;
    gap: 8px;
    margin: -12px 0 20px;
    padding: 10px 88px 12px 0;
    overflow-x: auto;
    transform: none;
    background: var(--nav-bg);
    border-bottom: 1px solid var(--section-rule);
    backdrop-filter: blur(12px);
  }

  .section-nav a {
    flex: 0 0 auto;
    background: transparent;
  }
}

@media (max-width: 860px) {
  .page {
    width: min(calc(100% - 28px), var(--measure));
    padding: 44px 0 102px;
  }

  .footprint-page {
    width: min(calc(100% - 22px), 1440px);
    padding: 54px 0 48px;
  }

  .theme-toggle {
    top: 10px;
    right: 12px;
    width: 28px;
    height: 28px;
    font-size: 11px;
  }

  .section-nav {
    gap: 5px;
    margin: -36px 0 18px;
    padding: 8px 44px 9px 0;
  }

  .section-nav a {
    padding: 4px 7px;
    font-size: 11.5px;
  }

  .section,
  .timeline-item,
  .publication-list li {
    grid-template-columns: 1fr;
  }

  .section {
    gap: 12px;
    padding: 26px 0;
  }

  .section-label {
    position: static;
  }

  .timeline-item,
  .publication-list li {
    gap: 6px;
  }

  .timeline-item time {
    text-align: left;
  }

  .term-list {
    justify-items: start;
  }

  .site-footer {
    padding-inline: 14px;
  }
}

@media (max-width: 520px) {
  body {
    font-size: 14px;
  }

  .page {
    width: min(calc(100% - 20px), var(--measure));
  }

  h1 {
    font-size: 32px;
  }

  .contact-list {
    display: grid;
    gap: 8px;
  }

  .section-nav {
    gap: 2px;
    margin: -36px -2px 16px;
    padding-right: 36px;
  }

  .section-nav a {
    padding: 4px 4px;
    font-size: 10.5px;
    letter-spacing: 0;
  }

  .theme-toggle {
    right: 8px;
    width: 26px;
    height: 26px;
    font-size: 10.5px;
  }

  .footprint-map {
    height: calc(100svh - 190px);
    min-height: 420px;
  }

  .map-controls {
    right: 9px;
    bottom: 9px;
  }

  .map-controls button {
    width: 28px;
    height: 28px;
    font-size: 10px;
  }
}