:root {
  color-scheme: light;
  --bg: #ffffff;
  --fg: #09090b;
  --muted: #71717a;
  --faint: #a1a1aa;
  --line: #e4e4e7;
  --soft: #f4f4f5;
  --visited: #fff3c4;
  --visited-hover: #ffe58a;
  --radius: 8px;
  --header: 56px;
  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --mono: ui-monospace, "SFMono-Regular", "Cascadia Code", Menlo, Consolas, monospace;
}

body.site,
body.site * {
  box-sizing: border-box;
}

body.site {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  padding-top: var(--header);
  -webkit-font-smoothing: antialiased;
}

::selection {
  background: #18181b;
  color: #fafafa;
}

:focus-visible {
  outline: 2px solid #18181b;
  outline-offset: 2px;
}

.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 40;
  height: var(--header);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
  font-family: var(--sans);
}

.topbar-inner {
  max-width: 1120px;
  height: 100%;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 16px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 2px;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
  padding: 6px 10px;
  border-radius: 6px;
}

.nav a:hover {
  color: var(--fg);
  background: var(--soft);
  text-decoration: none;
}

.nav a.active {
  color: var(--fg);
  font-weight: 600;
}

.wrap {
  width: min(720px, calc(100% - 48px));
  margin: 0 auto;
  padding-bottom: 96px;
}

.wrap.wide {
  width: min(960px, calc(100% - 48px));
}

.page-head {
  padding-top: 56px;
  margin-bottom: 12px;
}

.page-head h1,
.prose h1 {
  margin: 0;
  font-size: 32px;
  line-height: 1.2;
  font-weight: 600;
  letter-spacing: -0.03em;
}

.lede {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 15px;
}

.post-list,
.trip-list {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
}

.post-list a,
.trip-list a {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  column-gap: 24px;
  row-gap: 6px;
  align-items: baseline;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
  color: inherit;
  text-decoration: none;
}

.post-title,
.trip-place {
  grid-column: 1;
  color: var(--fg);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.post-excerpt,
.trip-title {
  grid-column: 1;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

.post-list time,
.trip-list time {
  grid-column: 2;
  grid-row: 1 / span 2;
  color: var(--faint);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}

.post-list a:hover .post-title,
.trip-list a:hover .trip-place {
  text-decoration: underline;
  text-underline-offset: 4px;
}

.empty {
  color: var(--muted);
  padding: 24px 0;
}

.prose { padding-top: 48px; }

.kicker {
  margin: 0 0 8px;
  font-size: 13px;
}

.kicker a {
  color: var(--muted);
  text-decoration: none;
}

.kicker a:hover { color: var(--fg); }

.meta {
  margin: 0 0 8px;
  color: var(--faint);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}

.prose {
  font-size: 16px;
  line-height: 1.75;
}

.prose h1 { margin-top: 0; margin-bottom: 0.6em; }
.prose h2 {
  margin: 1.8em 0 0.5em;
  font-size: 22px;
  letter-spacing: -0.02em;
  font-weight: 600;
  line-height: 1.3;
}
.prose h3 {
  margin: 1.5em 0 0.4em;
  font-size: 18px;
  font-weight: 600;
}
.prose h4 { margin: 1.2em 0 0.3em; font-size: 16px; }
.prose p { margin: 0.85em 0; }
.prose a {
  color: var(--fg);
  text-underline-offset: 3px;
}
.prose ul,
.prose ol { margin: 0.6em 0 0.8em; padding-left: 1.3em; }
.prose li { margin: 0.25em 0; }
.prose li > ul,
.prose li > ol { margin: 0.2em 0; }
.prose blockquote {
  margin: 1.2em 0;
  padding-left: 14px;
  border-left: 2px solid var(--fg);
  color: #3f3f46;
}
.prose hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 2em 0;
}
.prose img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 1.2em auto;
  border-radius: var(--radius);
  cursor: zoom-in;
}
.prose code,
.prose pre {
  font-family: var(--mono);
}
.prose :not(pre) > code {
  background: var(--soft);
  padding: 0.12em 0.35em;
  border-radius: 4px;
  font-size: 0.9em;
}
.prose pre {
  position: relative;
  background: #09090b;
  color: #fafafa;
  border-radius: var(--radius);
  padding: 16px 16px 16px 18px;
  overflow: auto;
  font-size: 13px;
  line-height: 1.65;
}
.prose pre code {
  background: transparent;
  padding: 0;
  font-size: inherit;
  color: inherit;
}
.prose .table-scroll { overflow-x: auto; margin: 1.1em 0 1.4em; }
.prose table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  line-height: 1.5;
}
.prose th,
.prose td {
  border-bottom: 1px solid var(--line);
  padding: 8px 12px 8px 0;
  text-align: left;
  vertical-align: top;
}
.prose th { font-weight: 600; color: var(--fg); }
.prose .mermaid {
  margin: 1.2em 0;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow-x: auto;
  text-align: center;
  white-space: pre-wrap;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 13px;
}

.copy-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 32px;
  height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  border: 1px solid transparent;
  border-radius: 6px;
  background: transparent;
  color: #a1a1aa;
  cursor: pointer;
}
.site pre .copy-btn:hover { background: #18181b; color: #fafafa; }

.map-frame {
  margin-top: 28px;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 8px 8px 4px;
}

#china-map {
  display: block;
  width: 100%;
  height: auto;
}

.province {
  fill: #fafafa;
  stroke: #d4d4d8;
  stroke-width: 1;
  stroke-linejoin: round;
  vector-effect: non-scaling-stroke;
  transition: fill 0.15s ease;
}

.province.visited {
  fill: var(--visited);
  stroke: #e6c56a;
  cursor: pointer;
}

.province.visited:hover,
.province.visited:focus { fill: var(--visited-hover); }

.map-legend {
  display: flex;
  gap: 16px;
  margin: 14px 2px 0;
  color: var(--muted);
  font-size: 13px;
}

.map-legend span { display: inline-flex; align-items: center; gap: 6px; }

.swatch {
  width: 12px;
  height: 12px;
  border-radius: 2px;
  border: 1px solid #d4d4d8;
  background: #fafafa;
}

.swatch.visited {
  background: var(--visited);
  border-color: #e6c56a;
}

.map-tip {
  position: fixed;
  z-index: 50;
  min-width: 128px;
  max-width: 260px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 6px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
}

.map-tip[hidden] { display: none; }

.map-tip .tip-name {
  margin: 0;
  padding: 4px 8px 2px;
  color: var(--muted);
  font-size: 12px;
}

.map-tip a {
  display: block;
  margin-top: 2px;
  padding: 6px 8px;
  border-radius: 6px;
  color: var(--fg);
  text-decoration: none;
  font-size: 14px;
}

.map-tip a:hover { background: var(--soft); }

.img-viewer {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 28px;
  background: rgba(0, 0, 0, 0.78);
  cursor: zoom-out;
}

.img-viewer[hidden] { display: none; }

.img-viewer img {
  max-width: min(1100px, 100%);
  max-height: 100%;
  border-radius: 8px;
  box-shadow: none;
}

@media (max-width: 640px) {
  .topbar-inner { padding: 0 14px; }
  .nav a { padding: 6px 7px; font-size: 13px; }
  .wrap { width: min(720px, calc(100% - 28px)); }
  .page-head { padding-top: 36px; }
  .page-head h1, .prose h1 { font-size: 28px; }
  .post-list a, .trip-list a {
    grid-template-columns: 1fr;
  }
  .post-list time, .trip-list time {
    grid-column: 1;
    grid-row: auto;
  }
}