:root {
  --paper: #f5f0e8;
  --paper-deep: #e9e0d4;
  --ink: #27212a;
  --muted: #6f6670;
  --line: #d3c7ca;
  --accent: #7c3f63;
  --accent-deep: #5c2946;
  --accent-soft: #ead7e1;
  --green: #426b5a;
  --green-soft: #dce9e2;
  --surface: #fffdfa;
  --surface-muted: #faf7f3;
  --surface-translucent: rgba(255, 253, 250, 0.72);
  --surface-soft-translucent: rgba(255, 253, 250, 0.56);
  --header-bg: rgba(245, 240, 232, 0.92);
  --header-line: rgba(124, 63, 99, 0.18);
  --ambient-glow: rgba(124, 63, 99, 0.08);
  --quote-bg: rgba(234, 215, 225, 0.45);
  --danger-line: #a83f4d;
  --danger-bg: #f8e4e6;
  --danger-ink: #712632;
  --on-ink: #fffdfa;
  --on-accent: #fffdfa;
  --shadow: 0 18px 50px rgba(67, 45, 58, 0.09);
  --radius: 18px;
  --content: 1180px;
  color-scheme: light;
}

:root[data-theme="dark"] {
  --paper: #1c181c;
  --paper-deep: #2a2329;
  --ink: #eee7ec;
  --muted: #b8aeb6;
  --line: #4b3e47;
  --accent: #d18aaf;
  --accent-deep: #efafd0;
  --accent-soft: #402b38;
  --green: #8cc0a8;
  --green-soft: #243a31;
  --surface: #252025;
  --surface-muted: #211c21;
  --surface-translucent: rgba(37, 32, 37, 0.92);
  --surface-soft-translucent: rgba(37, 32, 37, 0.78);
  --header-bg: rgba(28, 24, 28, 0.92);
  --header-line: rgba(209, 138, 175, 0.28);
  --ambient-glow: rgba(209, 138, 175, 0.1);
  --quote-bg: rgba(64, 43, 56, 0.72);
  --danger-line: #d97989;
  --danger-bg: #4d2630;
  --danger-ink: #ffd8df;
  --on-ink: #1c181c;
  --on-accent: #23141c;
  --shadow: none;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 0%, var(--ambient-glow), transparent 30rem),
    var(--paper);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans CJK SC",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.72;
  text-rendering: optimizeLegibility;
}

a { color: var(--accent-deep); text-underline-offset: 0.18em; }
a:hover { color: var(--accent); }
button, input, select { font: inherit; }
button { color: inherit; }
:where(a, button, input, select, summary):focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}
.skip-link {
  position: fixed;
  z-index: 100;
  top: 0.5rem;
  left: 0.5rem;
  padding: 0.6rem 0.9rem;
  transform: translateY(-150%);
  background: var(--ink);
  color: var(--on-ink);
}
.skip-link:focus { transform: none; }

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  border-bottom: 1px solid var(--header-line);
  background: var(--header-bg);
  backdrop-filter: blur(14px);
}
.header-inner {
  width: min(var(--content), calc(100% - 2rem));
  min-height: 76px;
  margin: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  color: var(--ink);
  text-decoration: none;
}
.brand-mark {
  width: 34px;
  height: 34px;
  border: 1px solid var(--accent);
  border-radius: 50%;
  background:
    linear-gradient(140deg, transparent 46%, var(--accent) 47% 53%, transparent 54%),
    radial-gradient(circle at 35% 35%, var(--accent-soft) 0 34%, transparent 36%);
  box-shadow: inset 0 0 0 5px var(--paper);
}
.brand strong, .brand small { display: block; }
.brand strong { letter-spacing: 0.06em; }
.brand small { color: var(--muted); font-size: 0.72rem; }
.menu-toggle { display: none; }
.site-nav {
  display: flex;
  align-items: center;
  gap: 1.3rem;
}
.nav-main { display: contents; }
.site-nav a {
  color: var(--muted);
  font-size: 0.94rem;
  font-weight: 650;
  text-decoration: none;
}
.site-nav a:hover { color: var(--accent-deep); }
.site-nav .nav-star {
  margin-block: -0.35rem;
  padding: 0.35rem 0.72rem;
  border: 1px solid var(--accent);
  border-radius: 999px;
  color: var(--accent-deep);
}
.site-nav .nav-star:hover {
  background: var(--accent-soft);
  color: var(--accent-deep);
}
.theme-control {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
}
.theme-control select {
  min-height: 36px;
  padding: 0.35rem 1.8rem 0.35rem 0.6rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background-color: var(--surface);
  color: var(--ink);
  cursor: pointer;
}

main { min-height: calc(100vh - 200px); }
.hero, .home-section, .page-hero, .catalog-shell, .report-page,
.feedback-section, .prose-page, .not-found {
  width: min(var(--content), calc(100% - 2rem));
  margin-inline: auto;
}
.hero {
  min-height: 620px;
  display: grid;
  grid-template-columns: 1.5fr 0.72fr;
  align-items: center;
  gap: clamp(2rem, 7vw, 7rem);
  padding-block: 5rem;
}
.eyebrow {
  margin: 0 0 0.7rem;
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}
h1, h2, h3 { line-height: 1.25; }
.hero h1, .page-hero h1 {
  margin: 0;
  font-family: "Songti SC", "Noto Serif CJK SC", "STSong", serif;
  font-size: clamp(2.65rem, 6vw, 5.4rem);
  font-weight: 700;
  letter-spacing: -0.045em;
}
.hero-intro, .page-hero > p:last-child {
  max-width: 48rem;
  margin: 1.8rem 0 0;
  color: var(--muted);
  font-size: 1.08rem;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
}
.button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1.1rem;
  border: 1px solid var(--accent);
  border-radius: 999px;
  cursor: pointer;
  font-weight: 750;
  text-decoration: none;
}
.button.primary { background: var(--accent-deep); color: var(--on-accent); }
.button.secondary { background: transparent; color: var(--accent-deep); }
.button.small { min-height: 36px; padding: 0.45rem 0.8rem; font-size: 0.84rem; }
.button:hover { transform: translateY(-1px); }
.hero-card {
  padding: 2rem;
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 8px);
  background: var(--surface-translucent);
  box-shadow: var(--shadow);
}
.hero-card-label { color: var(--muted); font-size: 0.82rem; }
.hero-card > strong {
  display: block;
  color: var(--accent-deep);
  font-family: Georgia, serif;
  font-size: 5rem;
  line-height: 1;
}
.hero-card > span { color: var(--muted); }
.hero-card dl { margin: 2rem 0 1rem; }
.hero-card dl div {
  display: flex;
  justify-content: space-between;
  padding: 0.65rem 0;
  border-top: 1px solid var(--line);
}
.hero-card dt, .hero-card dd { margin: 0; }
.hero-card dd { color: var(--accent-deep); font-weight: 800; }
.hero-card small { color: var(--muted); }

.home-section { padding-block: 5rem; border-top: 1px solid var(--line); }
.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 2rem;
  margin-bottom: 2rem;
}
.section-heading h2, .method-preview h2, .feedback-section h2,
.prose-page h2 {
  margin: 0;
  font-family: "Songti SC", "Noto Serif CJK SC", serif;
  font-size: clamp(1.7rem, 3vw, 2.6rem);
}
.query-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
}
.query-card {
  min-height: 230px;
  padding: 1.3rem;
  background: var(--surface);
  text-decoration: none;
}
.query-card span {
  color: var(--accent);
  font-family: Georgia, serif;
  font-size: 2.3rem;
}
.query-card h3 { color: var(--ink); font-size: 1rem; }
.query-card p { color: var(--muted); font-size: 0.86rem; }
.query-card:hover { background: var(--accent-soft); }
.method-preview {
  display: grid;
  grid-template-columns: 0.78fr 1.22fr;
  gap: 5rem;
}
.method-preview ol { margin: 0; padding: 0; list-style: none; }
.method-preview li {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 1rem;
  padding: 1.1rem 0;
  border-top: 1px solid var(--line);
}
.method-preview li > span { color: var(--accent); font-family: Georgia, serif; }
.method-preview strong { font-size: 1.05rem; }
.method-preview p { margin: 0.2rem 0 0; color: var(--muted); }
.star-callout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 2rem;
}
.star-callout h2 {
  max-width: 50rem;
  margin: 0;
  font-family: "Songti SC", "Noto Serif CJK SC", serif;
  font-size: clamp(1.7rem, 3vw, 2.6rem);
}
.star-callout-copy > p:last-child {
  max-width: 50rem;
  margin: 1rem 0 0;
  color: var(--muted);
}
.star-callout .button { white-space: nowrap; }
.report-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}
.report-card {
  display: flex;
  min-height: 190px;
  flex-direction: column;
  padding: 1.35rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-soft-translucent);
  color: var(--ink);
  text-decoration: none;
}
.report-card:hover { border-color: var(--accent); background: var(--surface); }
.report-card small, .report-card p { color: var(--muted); }
.report-card h3 { margin: 0.7rem 0 0.4rem; font-size: 1.15rem; }
.report-card p { margin: 0; font-size: 0.86rem; }
.report-card .card-link { margin-top: auto; padding-top: 1.2rem; color: var(--accent); }
.feature-preview-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}
.feature-preview-card {
  min-height: 230px;
  display: flex;
  flex-direction: column;
  padding: 1.5rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--ink);
  text-decoration: none;
  transition: border-color 120ms ease, transform 120ms ease;
}
.feature-preview-card:hover {
  border-color: var(--accent);
  color: var(--ink);
  transform: translateY(-2px);
}
.feature-preview-card small {
  color: var(--accent);
  font-weight: 800;
}
.feature-preview-card h3 {
  margin: 0.8rem 0 0.45rem;
  font-family: "Songti SC", "Noto Serif CJK SC", serif;
  font-size: 1.45rem;
}
.feature-preview-card p { margin: 0; color: var(--muted); }
.feature-preview-card span {
  margin-top: auto;
  padding-top: 1.2rem;
  color: var(--accent-deep);
  font-weight: 750;
}

.page-hero { padding-block: 6rem 4rem; }
.page-hero.compact { padding-bottom: 2.5rem; }
.page-hero.compact h1 { font-size: clamp(2.6rem, 5vw, 4.5rem); }
.catalog-shell { padding-bottom: 5rem; }
.quick-filter-panel, .advanced-filters, .catalog-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.quick-filter-panel {
  padding: 1.2rem;
  border: 1px solid var(--line);
  border-radius: var(--radius) var(--radius) 0 0;
  background: var(--surface);
}
.control-label { margin: 0 0 0.5rem; font-size: 0.78rem; font-weight: 800; }
.quick-buttons { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.quick-filter-with-tooltip {
  position: relative;
  display: inline-flex;
}
.quick-buttons button, .text-button {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  cursor: pointer;
  font-size: 0.84rem;
}
.quick-buttons button { padding: 0.45rem 0.75rem; }
.quick-buttons button[aria-pressed="true"] {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent-deep);
  font-weight: 800;
}
.filter-tooltip {
  position: absolute;
  z-index: 20;
  bottom: calc(100% + 0.55rem);
  left: 0;
  width: min(23rem, calc(100vw - 3rem));
  padding: 0.65rem 0.75rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
  box-shadow: var(--shadow);
  color: var(--ink);
  font-size: 0.76rem;
  font-weight: 500;
  line-height: 1.55;
  opacity: 0;
  visibility: hidden;
  transform: translateY(0.25rem);
  transition: opacity 120ms ease, transform 120ms ease, visibility 120ms ease;
  pointer-events: none;
}
.quick-filter-with-tooltip:hover .filter-tooltip,
.quick-filter-with-tooltip button:focus-visible + .filter-tooltip {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.text-button { border: 0; color: var(--accent); text-decoration: underline; }
.advanced-filters {
  display: grid;
  grid-template-columns: repeat(6, minmax(140px, 1fr));
  padding: 1rem 1.2rem;
  border: solid var(--line);
  border-width: 0 1px 1px;
  background: var(--surface-translucent);
}
.advanced-filters > label > span {
  display: block;
  margin-bottom: 0.3rem;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 700;
}
.advanced-filters input:not([type="checkbox"]), .advanced-filters select {
  width: 100%;
  min-height: 40px;
  padding: 0.45rem 0.55rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  color: var(--ink);
}
.advanced-filters .search-control { grid-column: span 2; }
.advanced-filters > label > span small {
  display: block;
  margin-top: 0.15rem;
  color: var(--muted);
  font-size: 0.66rem;
  font-weight: 500;
}
.multi-filter-row {
  min-width: 0;
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}
.multi-filter-control {
  min-width: 0;
  margin: 0;
  padding: 0.7rem 0.8rem 0.8rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface-soft-translucent);
}
.multi-filter-control legend {
  padding: 0 0.25rem;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 750;
}
.multi-filter-control .filter-help {
  margin: -0.05rem 0 0.6rem;
  color: var(--muted);
  font-size: 0.66rem;
  line-height: 1.45;
}
.multi-choice-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}
.multi-choice {
  position: relative;
  display: inline-flex;
  cursor: pointer;
}
.multi-choice input {
  width: 1px;
  height: 1px;
  position: absolute;
  overflow: hidden;
  opacity: 0;
}
.multi-choice .multi-choice-label {
  min-height: 34px;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin: 0;
  padding: 0.35rem 0.65rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--ink);
  font-size: 0.75rem;
  font-weight: 650;
  line-height: 1.3;
  transition: border-color 120ms ease, background-color 120ms ease;
}
.multi-choice:hover .multi-choice-label {
  border-color: var(--accent);
}
.multi-choice input:focus-visible + .multi-choice-label {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}
.multi-choice input:checked + .multi-choice-label {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent-deep);
  font-weight: 800;
}
.multi-choice input:checked + .multi-choice-label::before {
  content: "✓";
  font-size: 0.78rem;
  line-height: 1;
}
.catalog-toolbar { padding: 1rem 0; }
.catalog-toolbar p { margin: 0; color: var(--muted); }
.catalog-toolbar > div { display: flex; gap: 0.5rem; }
#classification-table {
  min-height: 480px;
  border: 1px solid var(--line);
  background: var(--surface);
}
.error-panel, .noscript {
  padding: 1rem;
  border: 1px solid var(--danger-line);
  background: var(--danger-bg);
  color: var(--danger-ink);
}
.tabulator {
  border: 0 !important;
  background: var(--surface) !important;
  color: var(--ink) !important;
  font-size: 0.84rem;
}
.tabulator .tabulator-header {
  border-bottom-color: var(--line) !important;
  background: var(--paper-deep) !important;
  color: var(--ink) !important;
}
.tabulator .tabulator-header .tabulator-col {
  background: var(--paper-deep) !important;
  color: var(--ink) !important;
}
.tabulator .tabulator-header .tabulator-col.tabulator-sortable:hover {
  background: var(--accent-soft) !important;
}
.tabulator .tabulator-header .tabulator-col,
.tabulator .tabulator-row,
.tabulator .tabulator-row .tabulator-cell {
  border-color: var(--line) !important;
}
.tabulator .tabulator-header-filter input,
.tabulator .tabulator-header-filter select,
.tabulator .tabulator-footer .tabulator-page-size {
  border: 1px solid var(--line) !important;
  background: var(--surface) !important;
  color: var(--ink) !important;
}
.tabulator .tabulator-header-filter input::placeholder {
  color: var(--muted);
  opacity: 1;
}
.tabulator .tabulator-header .tabulator-col[aria-sort="none"] .tabulator-arrow {
  border-bottom-color: var(--muted) !important;
}
.tabulator .tabulator-header .tabulator-col[aria-sort="ascending"] .tabulator-arrow {
  border-bottom-color: var(--accent) !important;
}
.tabulator .tabulator-header .tabulator-col[aria-sort="descending"] .tabulator-arrow {
  border-top-color: var(--accent) !important;
}
.tabulator .tabulator-tableholder .tabulator-table {
  background: var(--surface) !important;
  color: var(--ink) !important;
}
.tabulator .tabulator-tableholder .tabulator-placeholder .tabulator-placeholder-contents {
  color: var(--muted) !important;
}
.tabulator .tabulator-row { background: var(--surface) !important; }
.tabulator .tabulator-row:nth-child(even) { background: var(--surface-muted) !important; }
.tabulator .tabulator-row:hover { background: var(--accent-soft) !important; }
.tabulator .tabulator-row.tabulator-selected {
  background: var(--green-soft) !important;
}
.tabulator .tabulator-row .tabulator-responsive-collapse {
  border-color: var(--line) !important;
  background: inherit;
  color: var(--ink);
}
.tabulator .tabulator-footer {
  border-color: var(--line) !important;
  background: var(--paper-deep) !important;
  color: var(--ink) !important;
}
.tabulator .tabulator-footer .tabulator-paginator {
  color: var(--ink) !important;
}
.tabulator .tabulator-footer .tabulator-page {
  border-color: var(--line) !important;
  background: var(--surface) !important;
  color: var(--ink) !important;
}
.tabulator .tabulator-footer .tabulator-page:not(.active):not(:disabled):hover {
  background: var(--accent-soft) !important;
  color: var(--accent-deep) !important;
}
.tabulator .tabulator-footer .tabulator-page:disabled {
  color: var(--muted) !important;
  opacity: 0.58;
}
.tabulator .tabulator-page.active {
  border-color: var(--accent) !important;
  background: var(--accent) !important;
  color: var(--on-accent) !important;
}
.tabulator .tabulator-alert .tabulator-alert-msg {
  border-color: var(--line) !important;
  background: var(--surface) !important;
  color: var(--ink) !important;
}

.articles-hero { min-height: auto; padding-block: 5rem 3rem; }
.articles-hub {
  width: min(var(--content), calc(100% - 2rem));
  margin: 0 auto 6rem;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.2rem;
}
.feature-card {
  min-width: 0;
  display: flex;
  flex-direction: column;
  padding: clamp(1.5rem, 4vw, 2.4rem);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}
.feature-card.data-feature {
  background:
    linear-gradient(150deg, var(--surface), var(--accent-soft));
}
.feature-kicker {
  margin: 0 0 0.8rem;
  color: var(--accent);
  font-size: 0.76rem;
  font-weight: 850;
  letter-spacing: 0.08em;
}
.feature-card h2 {
  margin: 0;
  font-family: "Songti SC", "Noto Serif CJK SC", serif;
  font-size: clamp(1.7rem, 3vw, 2.4rem);
}
.feature-card > p:not(.feature-kicker) { color: var(--muted); }
.feature-card ul { padding-left: 1.2rem; }
.feature-link {
  align-self: flex-start;
  margin-top: auto;
  padding-top: 1.2rem;
  font-weight: 800;
}

.article-page {
  width: min(var(--content), calc(100% - 2rem));
  margin-inline: auto;
  padding-block: 4.5rem 5rem;
}
.article-header {
  max-width: 980px;
  margin: 0 auto 4rem;
  text-align: center;
}
.article-header h1 {
  margin: 0;
  font-family: "Songti SC", "Noto Serif CJK SC", serif;
  font-size: clamp(2.35rem, 5vw, 4.4rem);
  letter-spacing: -0.025em;
}
.article-deck {
  max-width: 760px;
  margin: 1.2rem auto 0;
  color: var(--muted);
  font-size: clamp(1.02rem, 2vw, 1.24rem);
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.45rem;
  margin-top: 1.5rem;
}
.article-meta span {
  padding: 0.35rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
}
.snapshot-notice {
  max-width: 720px;
  margin: 1.6rem auto 0;
  padding: 1rem 1.2rem;
  border: 1px solid var(--accent);
  border-radius: 12px;
  background: var(--accent-soft);
  text-align: left;
}
.snapshot-notice strong { color: var(--accent-deep); }
.snapshot-notice p { margin: 0.2rem 0 0; color: var(--muted); }
.article-layout {
  display: grid;
  grid-template-columns: 210px minmax(0, 880px);
  justify-content: center;
  gap: clamp(2rem, 5vw, 5rem);
  align-items: start;
}
.article-toc {
  position: sticky;
  top: 104px;
  max-height: calc(100vh - 130px);
  overflow: auto;
  padding-left: 1rem;
  border-left: 1px solid var(--line);
  font-size: 0.78rem;
}
.article-toc > p { margin-top: 0; color: var(--muted); font-weight: 800; }
.article-toc ol { margin: 0; padding: 0; list-style: none; }
.article-toc li { margin: 0.55rem 0; }
.article-toc a { color: var(--muted); text-decoration: none; }
.article-toc a:hover { color: var(--accent); }
.article-content { min-width: 0; }
.article-content h2 {
  margin: 3.5rem 0 1rem;
  padding-top: 0.6rem;
  border-top: 1px solid var(--line);
  font-family: "Songti SC", "Noto Serif CJK SC", serif;
  font-size: clamp(1.6rem, 3vw, 2rem);
}
.article-content > h2:first-child { margin-top: 0; }
.article-content h3 { margin-top: 2.3rem; font-size: 1.24rem; }
.article-content p, .article-content li { text-align: justify; }
.article-content blockquote {
  margin: 1.4rem 0;
  padding: 0.9rem 1.1rem;
  border-left: 3px solid var(--accent);
  background: var(--quote-bg);
}
.article-content blockquote p { margin: 0.3rem 0; }
.article-content code {
  padding: 0.12em 0.34em;
  border-radius: 4px;
  background: var(--paper-deep);
  font-size: 0.9em;
}
.article-content pre {
  max-height: 34rem;
  margin: 1rem 0 0;
  padding: 1rem;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface-muted);
  white-space: pre-wrap;
  word-break: break-word;
}
.article-content pre code { padding: 0; background: transparent; }
.article-content table {
  width: 100%;
  min-width: 760px;
  border-collapse: collapse;
  font-size: 0.79rem;
  line-height: 1.55;
}
.article-content th, .article-content td {
  padding: 0.65rem;
  border: 1px solid var(--line);
  vertical-align: top;
}
.article-content th { background: var(--paper-deep); text-align: left; }
.article-content tr:nth-child(even) td {
  background: var(--surface-soft-translucent);
}
.article-figure {
  margin: 2rem 0;
  padding: 0.8rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #faf8fb;
}
.article-figure img {
  width: 100%;
  height: auto;
  display: block;
}
.article-figure figcaption {
  padding: 0.75rem 0.35rem 0.15rem;
  color: #665d68;
  font-size: 0.82rem;
  line-height: 1.55;
}
.article-section { scroll-margin-top: 7rem; }
.article-disclosure {
  border: 1px solid var(--accent);
  border-radius: 12px;
  background: var(--surface-soft-translucent);
}
.article-disclosure > summary {
  display: flex;
  cursor: pointer;
  flex-direction: column;
  padding: 1rem 1.2rem;
  color: var(--accent-deep);
  font-weight: 850;
}
.article-disclosure > summary small { color: var(--muted); font-weight: 500; }
.article-disclosure-body { padding: 0 1.2rem 1.3rem; }
.copy-toolbar {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.7rem;
  margin-top: 0.8rem;
}
.copy-toolbar button, .faq-actions button, .snapshot-reset {
  min-height: 38px;
  padding: 0.4rem 0.75rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  cursor: pointer;
  font-size: 0.78rem;
  font-weight: 750;
}
.copy-toolbar button:hover, .faq-actions button:hover, .snapshot-reset:hover {
  border-color: var(--accent);
  color: var(--accent-deep);
}
.copy-status { min-width: 4rem; color: var(--muted); font-size: 0.76rem; }
.faq-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1rem;
  border-top: 1px solid var(--line);
}
.faq-heading h2 { flex: 1; border-top: 0; }
.faq-actions { display: flex; gap: 0.4rem; padding-bottom: 1rem; }
.faq-item {
  border-top: 1px solid var(--line);
  scroll-margin-top: 7rem;
}
.faq-item:last-child { border-bottom: 1px solid var(--line); }
.faq-item > summary {
  cursor: pointer;
  padding: 1rem 0.25rem;
  font-weight: 800;
}
.faq-item[open] > summary { color: var(--accent-deep); }
.faq-answer { padding: 0 0.25rem 1rem; }
.faq-answer p:first-child { margin-top: 0; }
.article-license {
  margin-top: 4rem;
  padding: 1rem 1.2rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
}
.article-license p { margin: 0.25rem 0 0; color: var(--muted); font-size: 0.86rem; }
.snapshot-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1.2rem;
  margin-top: 4rem;
  border-top: 1px solid var(--line);
}
.snapshot-heading h2 { margin-bottom: 0; border: 0; }
.snapshot-heading > div > p:last-child { color: var(--muted); }
.snapshot-count {
  flex: 0 0 auto;
  color: var(--muted);
  font-weight: 750;
}
.snapshot-filters {
  display: grid;
  grid-template-columns: 1.5fr repeat(4, minmax(120px, 1fr)) auto;
  gap: 0.65rem;
  margin: 1.2rem 0;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface-soft-translucent);
}
.snapshot-filters label > span {
  display: block;
  margin-bottom: 0.25rem;
  color: var(--muted);
  font-size: 0.7rem;
  font-weight: 750;
}
.snapshot-filters input, .snapshot-filters select {
  width: 100%;
  min-height: 42px;
  padding: 0.45rem 0.6rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  color: var(--ink);
}
.snapshot-reset { align-self: end; border-radius: 8px; }
.snapshot-table {
  max-width: 100%;
  overflow-x: auto;
  border: 1px solid var(--line);
}
.snapshot-table .tabulator { min-width: 1040px; }
.snapshot-error {
  margin: 0;
  padding: 1rem;
  color: var(--danger-ink);
  background: var(--danger-bg);
}
.snapshot-noscript {
  padding: 1rem;
  border: 1px dashed var(--line);
  border-radius: 10px;
  color: var(--muted);
}
.topic-callout {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  margin-top: 2rem;
  padding: 1.4rem 1.5rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}
.prose-page .topic-callout h2 {
  margin: 0;
  padding: 0;
  border: 0;
  font-size: 1.35rem;
}
.topic-callout p { margin: 0.35rem 0 0; color: var(--muted); }
.topic-callout .button { flex: 0 0 auto; }

.report-page { padding-block: 4rem 5rem; }
.report-header {
  max-width: 900px;
  margin: 0 auto 3.5rem;
  text-align: center;
}
.report-header h1 {
  margin: 0;
  font-family: "Songti SC", "Noto Serif CJK SC", serif;
  font-size: clamp(2.2rem, 5vw, 4rem);
}
.report-subtitle { color: var(--muted); }
.label-strip {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.45rem;
  margin: 1.4rem 0;
}
.label-chip {
  padding: 0.3rem 0.65rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  font-size: 0.77rem;
}
.label-chip strong { color: var(--accent-deep); }
.back-link { font-size: 0.88rem; }
.report-layout {
  display: grid;
  grid-template-columns: 210px minmax(0, 820px);
  justify-content: center;
  gap: clamp(2rem, 5vw, 5rem);
  align-items: start;
}
.report-toc {
  position: sticky;
  top: 104px;
  max-height: calc(100vh - 130px);
  overflow: auto;
  padding-left: 1rem;
  border-left: 1px solid var(--line);
  font-size: 0.78rem;
}
.report-toc > p { margin-top: 0; color: var(--muted); font-weight: 800; }
.report-toc ol { margin: 0; padding: 0; list-style: none; }
.report-toc li { margin: 0.55rem 0; }
.report-toc a { color: var(--muted); text-decoration: none; }
.report-toc a:hover { color: var(--accent); }
.report-content { min-width: 0; }
.report-content h2 {
  margin: 3.3rem 0 1rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--line);
  font-family: "Songti SC", "Noto Serif CJK SC", serif;
  font-size: 1.8rem;
}
.report-content h2:first-child { margin-top: 0; }
.report-content h3 { margin-top: 2.2rem; font-size: 1.22rem; }
.report-content p, .report-content li { text-align: justify; }
.report-content blockquote {
  margin: 1.3rem 0;
  padding: 0.8rem 1rem;
  border-left: 3px solid var(--accent);
  background: var(--quote-bg);
}
.report-content blockquote p { margin: 0.3rem 0; }
.report-content code {
  padding: 0.12em 0.34em;
  border-radius: 4px;
  background: var(--paper-deep);
  font-size: 0.9em;
}
.table-scroll {
  max-width: 100%;
  margin: 1.2rem 0;
  overflow-x: auto;
  border: 1px solid var(--line);
}
.report-content table {
  width: 100%;
  min-width: 760px;
  border-collapse: collapse;
  font-size: 0.79rem;
  line-height: 1.55;
}
.report-content th, .report-content td {
  padding: 0.65rem;
  border: 1px solid var(--line);
  vertical-align: top;
}
.report-content th { background: var(--paper-deep); text-align: left; }
.report-content tr:nth-child(even) td { background: var(--surface-soft-translucent); }
.alert {
  margin: 1.2rem 0;
  padding: 0.9rem 1rem;
  border: 1px solid var(--accent);
  border-radius: 10px;
  background: var(--accent-soft);
}
.alert strong { display: block; color: var(--accent-deep); }
.alert-content p { margin: 0.25rem 0 0; }
.spoiler-panel {
  margin-top: 2rem;
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  background: var(--surface-soft-translucent);
}
.spoiler-panel > summary {
  display: flex;
  cursor: pointer;
  flex-direction: column;
  padding: 1rem 1.2rem;
  color: var(--accent-deep);
  font-weight: 850;
}
.spoiler-panel > summary small { color: var(--muted); font-weight: 500; }
.spoiler-content { padding: 0 1.2rem 1.5rem; }
.feedback-section {
  display: grid;
  grid-template-columns: 0.72fr 1.28fr;
  gap: 4rem;
  padding-block: 4rem 6rem;
  border-top: 1px solid var(--line);
}
.compact-feedback { margin-top: 2rem; }
.feedback-section p { color: var(--muted); }
.comments-unavailable {
  padding: 1rem;
  border: 1px dashed var(--line);
  border-radius: 10px;
  color: var(--muted);
}

.prose-page { max-width: 900px; padding-bottom: 6rem; }
.prose-page h2 { margin-top: 4rem; padding-top: 1rem; border-top: 1px solid var(--line); }
.prose-page > p { font-size: 1.02rem; text-align: justify; }
.principle-callout {
  margin: 2rem 0 0;
  padding: 1.4rem 1.5rem;
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  background: var(--accent-soft);
}
.principle-callout .eyebrow { margin-bottom: 0.45rem; }
.principle-callout > a {
  display: inline-block;
  color: var(--accent-deep);
  font-family: "Songti SC", "Noto Serif CJK SC", serif;
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  font-weight: 700;
  line-height: 1.45;
}
.reading-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}
.reading-card {
  min-width: 0;
  display: flex;
  flex-direction: column;
  padding: 1.35rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}
.reading-card .reading-author {
  margin: 0 0 0.55rem;
  color: var(--accent);
  font-size: 0.76rem;
  font-weight: 850;
  letter-spacing: 0.08em;
}
.reading-card h3 {
  margin: 0;
  font-family: "Songti SC", "Noto Serif CJK SC", serif;
  font-size: 1.2rem;
  line-height: 1.5;
}
.reading-card > p:not(.reading-author) {
  margin: 0.8rem 0 0;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.65;
}
.reading-card > p.reading-note {
  margin-top: 0.55rem;
  font-size: 0.76rem;
}
.reading-link {
  align-self: flex-start;
  margin-top: auto;
  padding-top: 1.15rem;
  color: var(--accent-deep);
  font-weight: 750;
  text-decoration-thickness: 1px;
}
.layer-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
}
.layer-grid article { padding: 1.3rem; background: var(--surface); }
.layer-grid span { color: var(--accent); font-family: Georgia, serif; font-size: 1.8rem; }
.layer-grid h3 { margin: 0.3rem 0; }
.layer-grid p { margin: 0; color: var(--muted); font-size: 0.9rem; }
.prose-page h2[id] { scroll-margin-top: 7rem; }
.not-found { padding-block: 9rem; text-align: center; }
.not-found h1 {
  margin: 0;
  font-family: "Songti SC", "Noto Serif CJK SC", serif;
  font-size: clamp(2.2rem, 5vw, 4.2rem);
}
.not-found .hero-actions { justify-content: center; }

.site-footer {
  padding: 2rem 1rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.82rem;
  text-align: center;
}
.site-footer p { margin: 0.25rem; }
.site-footer .footer-ai-note {
  max-width: 72rem;
  margin: 0.45rem auto;
  color: var(--muted);
}
.footer-ai-note a { font-weight: 700; }

@media (max-width: 1000px) {
  .query-grid { grid-template-columns: repeat(2, 1fr); }
  .advanced-filters { grid-template-columns: repeat(4, 1fr); }
  .report-layout, .article-layout { grid-template-columns: 1fr; }
  .report-toc, .article-toc { position: static; display: none; }
  .snapshot-filters { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .snapshot-search { grid-column: span 2; }
}

@media (max-width: 920px) {
  .header-inner {
    min-height: 64px;
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 0.65rem 0.8rem;
    padding-block: 0.65rem;
  }
  .brand {
    min-width: 0;
    gap: 0.62rem;
  }
  .brand > span:last-child { min-width: 0; }
  .brand-mark {
    width: 30px;
    height: 30px;
    flex: 0 0 30px;
    box-shadow: inset 0 0 0 4px var(--paper);
  }
  .brand strong {
    overflow: hidden;
    font-size: 0.94rem;
    letter-spacing: 0.025em;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  .brand small { display: none; }
  .js .menu-toggle {
    min-height: 40px;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.42rem 0.72rem;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: var(--surface);
    color: var(--ink);
    cursor: pointer;
    font-size: 0.82rem;
    font-weight: 750;
  }
  .menu-toggle-icon {
    width: 0.82rem;
    height: 0.62rem;
    display: inline-block;
    border-block: 2px solid currentColor;
    position: relative;
  }
  .menu-toggle-icon::after {
    width: 100%;
    height: 2px;
    content: "";
    position: absolute;
    top: 50%;
    left: 0;
    background: currentColor;
    transform: translateY(-50%);
  }
  .site-header[data-menu-open="true"] .menu-toggle {
    border-color: var(--accent);
    background: var(--accent-soft);
    color: var(--accent-deep);
  }
  .site-nav {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: stretch;
    gap: 0.6rem;
    padding: 0.75rem 0 0.15rem;
    border-top: 1px solid var(--header-line);
  }
  .js .site-nav { display: none; }
  .js .site-header[data-menu-open="true"] .site-nav { display: grid; }
  .nav-main {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.45rem;
  }
  .site-nav a {
    min-height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.42rem 0.6rem;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: var(--surface-soft-translucent);
    font-size: 0.82rem;
    text-align: center;
  }
  .site-nav .nav-star {
    min-height: 42px;
    margin: 0;
    border-radius: 10px;
  }
  .site-nav .nav-feedback { min-width: 4.5rem; }
  .theme-control {
    grid-column: 1 / -1;
    min-height: 42px;
    justify-content: space-between;
    padding: 0.25rem 0.25rem 0.25rem 0.75rem;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: var(--surface-soft-translucent);
  }
  .theme-control select {
    min-width: 8.2rem;
    min-height: 34px;
    padding-block: 0.25rem;
    font-size: 0.75rem;
  }
}

@media (max-width: 760px) {
  .hero { min-height: auto; grid-template-columns: 1fr; padding-block: 4rem; }
  .hero-card { max-width: none; }
  .hero h1, .page-hero h1 { font-size: 2.55rem; }
  .home-section { padding-block: 3.5rem; }
  .method-preview, .star-callout, .feedback-section { grid-template-columns: 1fr; gap: 2rem; }
  .star-callout .button { justify-self: start; }
  .report-grid, .feature-preview-grid, .articles-hub { grid-template-columns: 1fr; }
  .query-grid { grid-template-columns: 1fr; }
  .query-card { min-height: 160px; }
  .section-heading { align-items: flex-start; flex-direction: column; }
  .quick-filter-panel, .catalog-toolbar { align-items: flex-start; flex-direction: column; }
  .advanced-filters { grid-template-columns: repeat(2, 1fr); }
  .advanced-filters .search-control { grid-column: 1 / -1; }
  .multi-filter-row { grid-template-columns: 1fr; }
  .catalog-toolbar > div { width: 100%; flex-wrap: wrap; }
  .report-page { padding-top: 3rem; }
  .report-header { text-align: left; }
  .label-strip { justify-content: flex-start; }
  .article-page { padding-top: 3rem; }
  .article-header { text-align: left; }
  .article-deck { margin-left: 0; }
  .article-meta { justify-content: flex-start; }
  .report-content p, .report-content li,
  .article-content p, .article-content li { text-align: left; }
  .layer-grid, .reading-grid { grid-template-columns: 1fr; }
  .faq-heading, .snapshot-heading, .topic-callout {
    align-items: flex-start;
    flex-direction: column;
  }
  .faq-actions { padding-bottom: 0.8rem; }
  .snapshot-filters { grid-template-columns: 1fr; }
  .snapshot-search { grid-column: auto; }
  .snapshot-reset { width: 100%; }
  .article-disclosure-body { padding-inline: 0.8rem; }
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --paper: #1c181c;
    --paper-deep: #2a2329;
    --ink: #eee7ec;
    --muted: #b8aeb6;
    --line: #4b3e47;
    --accent: #d18aaf;
    --accent-deep: #efafd0;
    --accent-soft: #402b38;
    --green: #8cc0a8;
    --green-soft: #243a31;
    --surface: #252025;
    --surface-muted: #211c21;
    --surface-translucent: rgba(37, 32, 37, 0.92);
    --surface-soft-translucent: rgba(37, 32, 37, 0.78);
    --header-bg: rgba(28, 24, 28, 0.92);
    --header-line: rgba(209, 138, 175, 0.28);
    --ambient-glow: rgba(209, 138, 175, 0.1);
    --quote-bg: rgba(64, 43, 56, 0.72);
    --danger-line: #d97989;
    --danger-bg: #4d2630;
    --danger-ink: #ffd8df;
    --on-ink: #1c181c;
    --on-accent: #23141c;
    --shadow: none;
    color-scheme: dark;
  }
}

@media print {
  .site-header, .site-footer, .report-toc, .article-toc,
  .feedback-section, .back-link { display: none; }
  body { background: white; color: black; }
  .report-page, .article-page { width: 100%; padding: 0; }
  .report-layout, .article-layout { display: block; }
  .spoiler-panel { border: 0; }
  .spoiler-panel > summary { display: none; }
  .spoiler-panel:not([open]) > .spoiler-content { display: block; }
}