:root {
  color-scheme: light;
  --paper: #f4efe3;
  --paper-light: #fbf8f0;
  --ink: #27231f;
  --ink-muted: #71685d;
  --line: #d6cbb8;
  --cinnabar: #9e2d27;
  --cinnabar-dark: #78201c;
  --hit-red: #9f1d1d;
  --hit-bg: #fff0ed;
  --disease-green: #2f6b43;
  --disease-bg: #edf7ef;
  --frequency-blue: #235b83;
  --frequency-bg: #edf5fb;
  --shadow: 0 18px 45px rgb(48 37 24 / 8%);
  font-family: "Songti SC", "STSong", "SimSun", "Noto Serif CJK SC", serif;
  background: var(--paper);
  color: var(--ink);
}

* {
  box-sizing: border-box;
}

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  background:
    linear-gradient(90deg, rgb(90 65 38 / 3%) 1px, transparent 1px) 0 0 / 36px 36px,
    var(--paper);
}

button,
input {
  font: inherit;
}

button {
  color: inherit;
}

button:focus-visible,
input:focus-visible,
a:focus-visible {
  outline: 3px solid rgb(158 45 39 / 30%);
  outline-offset: 3px;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: 72px;
  padding: 0 clamp(1rem, 4vw, 3rem);
  border-bottom: 1px solid var(--line);
  background: rgb(251 248 240 / 92%);
}

.brand h1 {
  margin: 0;
  font-size: clamp(1.35rem, 3vw, 1.8rem);
  font-weight: 600;
  letter-spacing: 0.08em;
}

.eyebrow {
  margin: 0;
  color: var(--cinnabar);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

.stats {
  color: var(--ink-muted);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
}

.directory-open,
.directory-close {
  min-width: 52px;
  min-height: 44px;
  padding: 0.55rem 0.85rem;
  border: 1px solid var(--cinnabar);
  border-radius: 999px;
  background: #fffaf5;
  color: var(--cinnabar-dark);
  font-weight: 700;
  cursor: pointer;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.directory-dialog {
  width: min(46rem, calc(100vw - 2rem));
  max-width: none;
  height: min(86vh, 52rem);
  max-height: none;
  margin: auto;
  padding: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--paper-light);
  color: var(--ink);
  box-shadow: 0 28px 80px rgb(30 22 15 / 28%);
}

.directory-dialog::backdrop {
  background: rgb(39 35 31 / 52%);
}

.directory-sheet {
  display: grid;
  grid-template-rows: auto auto minmax(0, 1fr);
  height: 100%;
}

.directory-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.8rem 1rem;
  border-bottom: 1px solid var(--line);
}

.directory-heading h2 {
  margin: 0 0 0.2rem;
  font-size: 1.2rem;
}

.catalogue {
  padding: 0.8rem 1rem 0.95rem;
  background: rgb(251 248 240 / 68%);
  border-bottom: 1px solid var(--line);
}

.mode-switch,
.categories,
.disease-details,
.review-filters {
  display: flex;
  align-items: center;
  gap: 0.55rem;
}

.mode-switch {
  margin-bottom: 0.9rem;
}

.disease-search,
.frequency-search {
  display: grid;
  gap: 0.35rem;
  margin: 0 0 0.8rem;
}

.disease-search[hidden],
.frequency-search[hidden] {
  display: none;
}

.disease-search label,
.frequency-search label {
  color: var(--ink-muted);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.78rem;
  font-weight: 700;
}

.disease-search input,
.frequency-search input {
  width: 100%;
  min-height: 2.7rem;
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper-light);
  color: var(--ink);
  font: inherit;
}

.disease-search input:focus-visible,
.frequency-search input:focus-visible {
  border-color: var(--cinnabar);
  outline: 2px solid rgb(158 45 39 / 20%);
  outline-offset: 2px;
}

.mode-switch button,
.categories button,
.disease-details button,
.review-filters button {
  border: 1px solid transparent;
  border-radius: 999px;
  background: transparent;
  cursor: pointer;
}

.mode-switch button {
  padding: 0.45rem 0.9rem;
  color: var(--ink-muted);
  font-weight: 700;
}

.mode-switch button[aria-pressed="true"] {
  background: var(--cinnabar);
  color: #fffaf0;
}

.categories,
.disease-details,
.review-filters {
  overflow-x: auto;
  padding-bottom: 0.15rem;
  scrollbar-width: thin;
}

.categories button,
.disease-details button,
.review-filters button {
  flex: 0 0 auto;
  padding: 0.38rem 0.78rem;
  border-color: var(--line);
  background: var(--paper-light);
}

.categories button[aria-pressed="true"],
.disease-details button[aria-pressed="true"],
.review-filters button[aria-pressed="true"] {
  border-color: var(--cinnabar);
  color: var(--cinnabar-dark);
  box-shadow: inset 0 -2px var(--cinnabar);
}

.disease-details {
  margin-top: 0.75rem;
  padding: 0.7rem 0.2rem 0.1rem;
  border-top: 1px dashed var(--line);
}

.disease-details > .no-results {
  flex: 1 0 100%;
  margin: 0;
  padding: 0.45rem 0.25rem;
  color: var(--ink-muted);
}

.review-filters {
  margin-top: 0.7rem;
}

.review-filters[hidden] {
  display: none;
}

.review-filters button {
  flex: 0 0 auto;
  padding: 0.32rem 0.68rem;
  color: var(--ink-muted);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.76rem;
}

.disease-details[hidden] {
  display: none;
}

.disease-details button {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}

.disease-details .disease-variant {
  margin-left: 0.65rem;
  border-style: dashed;
  background: var(--disease-bg);
  color: var(--disease-green);
}

.disease-details .disease-variant::before {
  content: "异名";
  padding: 0.08rem 0.3rem;
  border-radius: 3px;
  background: rgb(47 107 67 / 12%);
  font-size: 0.68rem;
}

.disease-detail-name {
  color: var(--disease-green);
  font-weight: 700;
}

.disease-details button[aria-pressed="true"] {
  border-color: var(--disease-green);
  color: var(--disease-green);
  box-shadow: inset 0 -2px var(--disease-green);
}

.disease-detail-count {
  color: var(--ink-muted);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.72rem;
}

.search-row {
  position: sticky;
  top: 0;
  z-index: 5;
  display: block;
  align-items: center;
  padding: 0.65rem clamp(1rem, 4vw, 3rem);
  border-bottom: 1px solid var(--line);
  background: rgb(244 239 227 / 96%);
  box-shadow: 0 4px 14px rgb(48 37 24 / 5%);
}

.search-row label {
  color: var(--ink-muted);
  font-size: 0.85rem;
  font-weight: 700;
}

.search-row input {
  display: block;
  width: min(100%, 46rem);
  min-height: 44px;
  margin: 0 auto;
  padding: 0.65rem 0.9rem;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--paper-light);
  color: var(--ink);
}

.reader-shell {
  display: block;
  min-height: 58vh;
  padding: 1rem clamp(0.75rem, 4vw, 3rem) 3rem;
}

.sidebar {
  min-height: 0;
  overflow-y: auto;
  border: 0;
  background: rgb(251 248 240 / 75%);
}

.frequency-directory {
  min-width: 0;
  overflow-x: clip;
  overflow-y: auto;
  padding: 0.8rem 1rem 1rem;
  background: rgb(251 248 240 / 75%);
}

.frequency-terms {
  display: grid;
  min-width: 0;
  gap: 0.55rem;
}

.frequency-term {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.75rem;
  width: 100%;
  min-width: 0;
  min-height: 44px;
  padding: 0.55rem 0.7rem;
  border: 1px solid rgb(40 91 130 / 24%);
  border-radius: 6px;
  background: var(--frequency-bg);
  color: var(--frequency-blue);
  cursor: pointer;
  text-align: left;
}

.frequency-term-main {
  display: flex;
  min-width: 0;
  align-items: baseline;
  gap: 0.55rem;
}

.frequency-term-rank,
.frequency-term-count {
  flex: 0 0 auto;
  color: var(--ink-muted);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.76rem;
  font-variant-numeric: tabular-nums;
}

.frequency-term-name {
  min-width: 0;
  overflow-wrap: anywhere;
  color: var(--frequency-blue);
  font-weight: 700;
}

.frequency-term[data-frequency-category="acupoint"] .frequency-term-name {
  color: var(--hit-red);
}

.frequency-term[data-frequency-category="disease"] .frequency-term-name {
  color: var(--disease-green);
}

.frequency-term-count {
  white-space: nowrap;
}

.frequency-load-more {
  width: 100%;
  min-height: 44px;
  margin-top: 0.7rem;
  border: 1px solid var(--frequency-blue);
  border-radius: 6px;
  background: var(--paper-light);
  color: var(--frequency-blue);
  font-weight: 700;
  cursor: pointer;
}

.sidebar-heading {
  position: sticky;
  top: 0;
  z-index: 1;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 1rem 1.1rem 0.8rem;
  border-bottom: 1px solid var(--line);
  background: var(--paper-light);
}

.sidebar-heading h2 {
  margin: 0;
  font-size: 1rem;
  letter-spacing: 0.1em;
}

.sidebar-heading span {
  color: var(--ink-muted);
  font-size: 0.78rem;
}

.acupoint-list {
  display: grid;
}

.acupoint {
  width: 100%;
  padding: 0.85rem 1.1rem;
  border: 0;
  border-bottom: 1px solid rgb(214 203 184 / 68%);
  background: transparent;
  cursor: pointer;
  text-align: left;
}

.acupoint-name,
.acupoint-meridian {
  display: block;
}

.acupoint-name {
  color: var(--hit-red);
  font-size: 1.08rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.acupoint-meridian {
  margin-top: 0.28rem;
  color: var(--ink-muted);
  font-size: 0.78rem;
}

.acupoint:hover {
  background: rgb(158 45 39 / 6%);
}

.acupoint.is-active {
  padding-left: 0.8rem;
  border-left: 0.3rem solid var(--cinnabar);
  background: rgb(158 45 39 / 9%);
  color: var(--cinnabar-dark);
}

.no-results {
  margin: 0;
  padding: 2rem 1rem;
  color: var(--ink-muted);
  text-align: center;
}

main {
  width: min(100%, 50rem);
  max-width: none;
  margin: 0 auto;
  padding: clamp(1.5rem, 4vw, 3.5rem);
  border-top: 4px solid var(--cinnabar);
  background: var(--paper-light);
  box-shadow: var(--shadow);
}

main h2 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 500;
  letter-spacing: 0.13em;
}

.detail-title {
  color: var(--hit-red);
}

.disease-title {
  color: var(--disease-green);
}

.detail-meta {
  margin: 0.7rem 0 2rem;
  color: var(--ink-muted);
  letter-spacing: 0.08em;
}

.location-text {
  margin: -1rem 0 1.5rem;
  color: var(--ink);
  line-height: 1.8;
}

.hit-navigator {
  position: sticky;
  top: 0;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.65rem;
  margin: 1rem 0;
  padding: 0.65rem;
  border: 1px solid var(--line);
  background: rgb(251 248 240 / 96%);
  box-shadow: 0 5px 16px rgb(48 37 24 / 8%);
}

.hit-navigator button {
  padding: 0.35rem 0.65rem;
  border: 1px solid var(--cinnabar);
  border-radius: 4px;
  background: #fffaf5;
  color: var(--cinnabar-dark);
  cursor: pointer;
}

.hit-navigator button:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

.hit-navigator span {
  min-width: 6.5rem;
  color: var(--ink-muted);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.8rem;
  text-align: center;
}

mark.entity-hit,
.search-hit,
.inline-acupoint-hit {
  padding: 0.05em 0.12em;
  border-radius: 0.15em;
  background: var(--hit-bg);
  color: var(--hit-red);
  font-weight: 800;
}

mark.disease-hit,
.search-hit.disease-hit {
  background: var(--disease-bg);
  color: var(--disease-green);
}

mark.frequency-hit,
.search-hit.frequency-hit {
  background: var(--frequency-bg);
  color: var(--frequency-blue);
}

.inline-acupoint-hit {
  display: inline;
  margin: 0;
  border: 0;
  font: inherit;
  line-height: inherit;
  text-decoration: underline;
  text-decoration-color: rgb(159 29 29 / 38%);
  text-underline-offset: 0.15em;
  vertical-align: baseline;
  cursor: pointer;
}

.inline-acupoint-hit:hover {
  background: #f4c6bd;
  text-decoration-color: currentColor;
}

.inline-acupoint-hit:focus-visible {
  outline: 3px solid rgb(159 29 29 / 45%);
  outline-offset: 2px;
}

mark.entity-hit.is-current-hit,
.search-hit.is-current-hit,
.inline-acupoint-hit.is-current-hit,
.acupoint-hit.is-current-hit {
  outline: 3px solid rgb(159 29 29 / 45%);
  outline-offset: 3px;
}

mark.disease-hit.is-current-hit,
.search-hit.disease-hit.is-current-hit {
  outline-color: rgb(47 107 67 / 45%);
}

mark.frequency-hit.is-current-hit,
.search-hit.frequency-hit.is-current-hit {
  outline-color: rgb(35 91 131 / 45%);
}

.source-heading {
  margin: 2.2rem 0 0.8rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--line);
  font-size: 1rem;
  letter-spacing: 0.12em;
}

blockquote {
  margin: 0;
  padding: 1rem 1.3rem;
  border-left: 2px solid var(--cinnabar);
  font-size: 1.08rem;
  line-height: 2;
}

.source-card {
  margin-bottom: 1.5rem;
  border: 1px solid var(--line);
  background: #fffdf7;
}

.load-more {
  width: 100%;
  min-height: 44px;
  margin: 0.25rem 0 1.5rem;
  border: 1px solid var(--cinnabar);
  border-radius: 4px;
  background: #fffaf5;
  color: var(--cinnabar-dark);
  font-weight: 700;
  cursor: pointer;
}

.reader-status {
  display: grid;
  min-height: 16rem;
  place-content: center;
  gap: 0.75rem;
  color: var(--ink-muted);
  text-align: center;
}

.reader-status.is-loading::before {
  content: "";
  width: 1.8rem;
  height: 1.8rem;
  margin: 0 auto;
  border: 3px solid rgb(158 45 39 / 18%);
  border-top-color: var(--cinnabar);
  border-radius: 50%;
  animation: reader-spin 700ms linear infinite;
}

.reader-status p {
  margin: 0;
}

.reader-status button {
  min-height: 44px;
  padding: 0.65rem 1rem;
  border: 1px solid var(--cinnabar);
  border-radius: 4px;
  background: #fffaf5;
  color: var(--cinnabar-dark);
  font-weight: 700;
  cursor: pointer;
}

@keyframes reader-spin {
  to { transform: rotate(360deg); }
}

.source-metadata {
  padding: 0.9rem 1.3rem 1.1rem;
  border-top: 1px solid var(--line);
  color: var(--ink-muted);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.8rem;
  line-height: 1.65;
}

.source-metadata h4,
.source-metadata p {
  margin: 0 0 0.35rem;
}

.source-metadata h4 {
  color: var(--ink);
  font-family: "Songti SC", "STSong", "SimSun", serif;
  font-size: 0.95rem;
  letter-spacing: 0.08em;
}

.record-disease {
  color: var(--disease-green);
  font-weight: 700;
}

.source-link {
  display: block;
  margin-top: 0.65rem;
  color: var(--cinnabar-dark);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.8rem;
  text-underline-offset: 0.2em;
  overflow-wrap: anywhere;
}

.ambiguity-marker {
  margin-top: 0.7rem !important;
  padding: 0.55rem 0.65rem;
  border-left: 3px solid var(--cinnabar);
  background: rgb(158 45 39 / 8%);
  color: var(--cinnabar-dark);
  font-weight: 700;
}

.empty-state {
  max-width: 28rem;
  margin: 4rem auto;
  color: var(--ink-muted);
  text-align: center;
}

.empty-state h2 {
  color: var(--ink);
  font-size: 1.7rem;
}

.empty-state p {
  line-height: 1.8;
}

.seal {
  display: grid;
  width: 3.5rem;
  height: 3.5rem;
  margin: 0 auto 1.5rem;
  place-items: center;
  border: 2px solid var(--cinnabar);
  color: var(--cinnabar);
  font-size: 1.5rem;
}

footer {
  padding: 1.25rem;
  border-top: 1px solid var(--line);
  color: var(--ink-muted);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  text-align: center;
}

@media (max-width: 760px) {
  .site-header {
    height: 56px;
    padding: 0 0.75rem 0 1rem;
  }

  .brand h1 {
    font-size: 1.3rem;
    letter-spacing: 0.06em;
    white-space: nowrap;
  }

  .search-row {
    padding: 0.5rem 0.75rem;
  }

  .reader-shell {
    padding: 0.75rem 0.5rem calc(5.5rem + env(safe-area-inset-bottom));
  }

  .hit-navigator {
    position: fixed;
    z-index: 8;
    inset: auto 0 0;
    justify-content: center;
    margin: 0;
    padding: 0.6rem 0.75rem calc(0.6rem + env(safe-area-inset-bottom));
    border-width: 1px 0 0;
  }

  .hit-navigator button {
    min-height: 44px;
    padding-inline: 0.9rem;
  }

  .directory-dialog {
    width: 100vw;
    height: 100dvh;
    margin: 0;
    border: 0;
    border-radius: 0;
  }

  .directory-sheet,
  .directory-heading,
  .catalogue,
  .sidebar,
  .frequency-directory {
    min-width: 0;
    max-width: 100%;
  }

  .directory-heading > div {
    min-width: 0;
  }

  .directory-sheet,
  .catalogue,
  .sidebar,
  .frequency-directory {
    overflow-x: clip;
  }

  .categories,
  .disease-details,
  .review-filters {
    width: 100%;
    min-width: 0;
    max-width: 100%;
  }

  .categories button,
  .disease-details button,
  .review-filters button {
    max-width: calc(100vw - 2.4rem);
    overflow-wrap: anywhere;
    white-space: normal;
    text-align: left;
  }

  main {
    min-height: calc(100dvh - 8rem);
    padding: 1.25rem 1rem;
  }

  main h2 {
    font-size: 1.75rem;
  }

  blockquote {
    padding: 0.9rem 0.85rem;
    font-size: 17px;
    line-height: 1.85;
  }

  .source-metadata {
    padding-inline: 0.9rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; }
  .reader-status.is-loading::before { animation: none; }
}