:root {
  --paper: #f6f2ea;
  --ink: #23201c;
  --ink-soft: #6e655a;
  --teal: #1f4b57;
  --ochre: #a05430;
  --rule: #ddd5c7;
  --tag-teal: #dce7e8;
  --tag-ochre: #f0e3d7;
  --serif: "Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --sans: -apple-system, "Segoe UI", "Microsoft YaHei", "PingFang SC", sans-serif;
  --content-max: 980px;
  --col-main: 720px;
  --radius: 6px;
}

/* ==========================================================
   base
   ========================================================== */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background-color: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.9;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--teal);
  text-decoration: none;
  text-underline-offset: 3px;
}

a:hover {
  text-decoration: underline;
  text-decoration-thickness: 2px;
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

p {
  margin: 0 0 0.9em;
}

h1,
h2,
h3,
h4 {
  margin: 0 0 0.5em;
  font-family: var(--serif);
  font-weight: 600;
  line-height: 1.45;
  color: var(--ink);
}

h2 {
  font-size: 21px;
}

h3 {
  font-size: 18px;
}

h4 {
  font-size: 16px;
}

table {
  border-collapse: collapse;
  width: 100%;
}

figure {
  margin: 0;
}

figcaption {
  font-family: var(--sans);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  margin-top: 8px;
  line-height: 1.7;
}

sup.fn-ref,
sup {
  font-family: var(--sans);
  font-size: 11px;
  letter-spacing: 0.05em;
  line-height: 1;
  vertical-align: super;
}

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

sup a:hover {
  text-decoration: underline;
}

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

:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
}

/* ==========================================================
   layout — shell
   ========================================================== */

.site-body {
  min-height: 100vh;
  display: block;
}

.site-header {
  background-color: var(--paper);
  border-bottom: 1px solid var(--rule);
}

.brand-block {
  padding: 22px 24px 14px;
}

.brand-link {
  display: inline-block;
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--ink);
  text-decoration: none;
}

.brand-link:hover {
  color: var(--teal);
  text-decoration: none;
}

.brand-slogan {
  margin: 6px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
  font-family: var(--sans);
  letter-spacing: 0.02em;
}

.site-nav {
  padding: 0 24px 18px;
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 20px;
}

.nav-item a {
  display: inline-block;
  padding: 6px 0;
  font-family: var(--sans);
  font-size: 14px;
  letter-spacing: 0.05em;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 2px solid transparent;
}

.nav-item a:hover {
  color: var(--teal);
  border-bottom-color: var(--rule);
  text-decoration: none;
}

.nav-item.is-current a {
  color: var(--teal);
  font-weight: 600;
  border-bottom-color: var(--teal);
}

.header-note {
  margin: 0;
  padding: 0 24px 18px;
  font-family: var(--sans);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
}

.header-note a {
  color: var(--ink-soft);
  text-decoration: underline;
}

.header-note a:hover {
  color: var(--teal);
}

.site-main {
  display: block;
  padding: 0 24px 60px;
}

.home-main,
.inner-main {
  max-width: var(--content-max);
  margin: 0 auto;
}

.site-footer {
  border-top: 1px solid var(--rule);
  padding: 40px 24px 32px;
  background-color: var(--paper);
}

.footer-columns {
  max-width: var(--content-max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 32px 40px;
}

.footer-title {
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--ink-soft);
  margin: 0 0 12px;
  text-transform: uppercase;
}

.footer-links li {
  margin-bottom: 8px;
  font-size: 15px;
  line-height: 1.7;
}

.footer-links a {
  color: var(--ink);
}

.footer-links a:hover {
  color: var(--teal);
}

.footer-bottom {
  max-width: var(--content-max);
  margin: 36px auto 0;
  padding-top: 20px;
  border-top: 1px solid var(--rule);
  font-family: var(--sans);
  font-size: 12.5px;
  line-height: 1.8;
  color: var(--ink-soft);
  letter-spacing: 0.03em;
}

.footer-bottom p {
  margin: 0 0 6px;
}

.footer-copy {
  color: var(--ink-soft);
}

/* ==========================================================
   layout — inner page skeleton
   ========================================================== */

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 26px 0 6px;
  font-family: var(--sans);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
}

.breadcrumb a {
  color: var(--ink-soft);
  text-decoration: underline;
}

.breadcrumb a:hover {
  color: var(--teal);
}

.breadcrumb-sep {
  color: var(--rule);
}

.breadcrumb-current {
  color: var(--ink);
}

.page-header {
  padding: 10px 0 4px;
}

.page-title {
  font-family: var(--serif);
  font-size: 28px;
  font-weight: 600;
  line-height: 1.45;
  color: var(--ink);
  margin: 0 0 14px;
  letter-spacing: 0.01em;
}

.page-head {
  padding: 0 0 24px;
  border-bottom: 1px solid var(--rule);
  max-width: var(--col-main);
}

.page-kicker,
.section-label {
  font-family: var(--sans);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--ochre);
  margin: 0 0 10px;
  text-transform: uppercase;
}

.page-intro,
.page-desc,
.page-lead {
  font-size: 16.5px;
  line-height: 1.9;
  color: var(--ink);
  margin: 0 0 12px;
  max-width: var(--col-main);
}

.page-footnote,
.page-fn,
.footnote-mark {
  font-family: var(--sans);
  font-size: 12.5px;
  color: var(--ink-soft);
  letter-spacing: 0.04em;
  margin: 8px 0 0;
}

.page-footnote a,
.page-fn a,
.footnote-mark a {
  color: var(--ink-soft);
  text-decoration: underline;
}

.page-footnote a:hover,
.page-fn a:hover,
.footnote-mark a:hover {
  color: var(--teal);
}

/* ==========================================================
   components — anchors
   ========================================================== */

.page-anchors,
.anchor-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 18px;
  padding: 18px 0;
  border-bottom: 1px solid var(--rule);
  font-family: var(--sans);
  font-size: 12.5px;
  letter-spacing: 0.06em;
}

.anchors-label,
.anchor-label {
  color: var(--ink-soft);
  text-transform: uppercase;
}

.page-anchors .anchor-list,
.anchor-row .anchor-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
}

.page-anchors .anchor-list a,
.anchor-row .anchor-list a,
.anchor-row > a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 2px;
}

.page-anchors .anchor-list a:hover,
.anchor-row .anchor-list a:hover,
.anchor-row > a:hover {
  color: var(--teal);
  border-bottom-color: var(--teal);
  text-decoration: none;
}

/* ==========================================================
   components — section head & shared blocks
   ========================================================== */

.section-head {
  margin-bottom: 22px;
}

.section-head .section-desc {
  font-size: 15.5px;
  color: var(--ink-soft);
  margin: 6px 0 0;
  max-width: var(--col-main);
}

.section-lead,
.section-note,
.section-intro {
  font-size: 15.5px;
  color: var(--ink-soft);
  line-height: 1.85;
  margin: 0 0 20px;
  max-width: var(--col-main);
}

.section-more,
.stream-more,
.steps-more {
  margin-top: 20px;
  font-family: var(--sans);
  font-size: 13.5px;
  letter-spacing: 0.04em;
}

.section-more a,
.stream-more a,
.steps-more a {
  color: var(--teal);
  text-decoration: underline;
}

.section-more a:hover,
.stream-more a:hover,
.steps-more a:hover {
  text-decoration-thickness: 2px;
}

.note-box,
.digest-box {
  border-left: 3px solid var(--teal);
  background-color: rgba(31, 75, 87, 0.05);
  padding: 16px 20px;
  margin-bottom: 18px;
  border-radius: 0 var(--radius) var(--radius) 0;
}

.note-box p,
.digest-box p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink);
}

.note-rows,
.note-list {
  margin: 0;
  padding: 0;
}

.note-row,
.note-item {
  padding: 12px 0;
  border-bottom: 1px solid var(--rule);
  font-size: 15.5px;
  line-height: 1.8;
}

.note-row:last-child,
.note-item:last-child {
  border-bottom: none;
}

.note-row a,
.note-item a {
  color: var(--teal);
  text-decoration: underline;
}

/* ==========================================================
   components — buttons
   ========================================================== */

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 16px;
  margin-top: 22px;
}

.btn-primary,
.btn-ghost {
  display: inline-block;
  padding: 11px 22px;
  font-family: var(--sans);
  font-size: 14px;
  letter-spacing: 0.06em;
  border-radius: var(--radius);
  text-decoration: none;
  transition: background-color 0.16s ease, color 0.16s ease, border-color 0.16s ease;
}

.btn-primary {
  background-color: var(--teal);
  color: #f6f2ea;
  border: 1px solid var(--teal);
}

.btn-primary:hover {
  background-color: #173b45;
  border-color: #173b45;
  color: #f6f2ea;
  text-decoration: none;
}

.btn-ghost {
  background-color: transparent;
  color: var(--teal);
  border: 1px solid var(--teal);
}

.btn-ghost:hover {
  background-color: var(--tag-teal);
  text-decoration: none;
}

/* ==========================================================
   components — tags & labels
   ========================================================== */

.cover-tag,
.entry-tag,
.stream-tag,
.stream-type,
.stream-status,
.topic-partition,
.topic-partition-label,
.route-tag {
  display: inline-block;
  font-family: var(--sans);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  padding: 2px 9px;
  border-radius: 3px;
  line-height: 1.7;
  background-color: var(--tag-teal);
  color: var(--teal);
  white-space: nowrap;
}

.stream-type--new { background-color: var(--tag-teal); color: var(--teal); }
.stream-type--chapter { background-color: var(--tag-ochre); color: var(--ochre); }
.stream-type--edit { background-color: var(--tag-teal); color: var(--teal); }
.stream-type--off { background-color: #e6e0d6; color: var(--ink-soft); }

/* ==========================================================
   components — faq
   ========================================================== */

.faq-list,
.faq-group {
  max-width: var(--col-main);
}

.faq-item {
  border-bottom: 1px solid var(--rule);
}

.faq-item summary,
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 52px;
  padding: 14px 0;
  cursor: pointer;
  font-family: var(--serif);
  font-size: 16.5px;
  font-weight: 600;
  color: var(--ink);
  list-style: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "›";
  flex: none;
  font-family: var(--sans);
  font-size: 20px;
  line-height: 1;
  color: var(--ochre);
  transition: transform 0.16s ease;
}

.faq-item[open] summary::after {
  transform: rotate(90deg);
}

.faq-item summary:hover {
  color: var(--teal);
}

.faq-answer {
  padding: 0 0 18px 16px;
}

.faq-answer p {
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink);
  margin: 0 0 10px;
}

.faq-answer p:last-child {
  margin-bottom: 0;
}

.faq-group-intro {
  font-size: 15.5px;
  color: var(--ink-soft);
  margin: 0 0 14px;
}

/* ==========================================================
   components — footnote list
   ========================================================== */

.footnote-list {
  list-style: none;
  padding: 0;
  margin: 0;
  counter-reset: fn;
}

.footnote-list li {
  position: relative;
  padding: 10px 0 10px 34px;
  border-bottom: 1px solid var(--rule);
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.footnote-list li:last-child {
  border-bottom: none;
}

.footnote-list li::before {
  counter-increment: fn;
  content: counter(fn);
  position: absolute;
  left: 0;
  top: 10px;
  font-family: var(--sans);
  font-size: 12px;
  color: var(--ochre);
}

/* ==========================================================
   pages — index
   ========================================================== */

.home-main {
  padding-top: 26px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 56fr) minmax(0, 44fr);
  gap: 44px;
  padding: 30px 0 44px;
  border-bottom: 1px solid var(--rule);
}

.hero-lead {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.hero-lead h1 {
  font-size: 34px;
  line-height: 1.4;
  margin: 0 0 18px;
  color: var(--ink);
}

.hero-summary {
  font-size: 16.5px;
  line-height: 1.9;
  color: var(--ink);
  margin: 0 0 12px;
}

.hero-wall {
  display: grid;
  gap: 14px;
}

.hero-figure {
  border-radius: var(--radius);
  overflow: hidden;
}

.hero-figure img {
  width: 100%;
  height: 260px;
  object-fit: cover;
  border-radius: var(--radius);
}

.hero-figure figcaption {
  margin-top: 8px;
}

.cover-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.cover-item {
  min-width: 0;
}

.cover-item a {
  display: block;
  text-decoration: none;
  color: var(--ink);
}

.cover-item img {
  width: 100%;
  height: 132px;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--rule);
}

.cover-title {
  display: block;
  margin-top: 8px;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--ink);
}

.cover-item a:hover .cover-title {
  color: var(--teal);
  text-decoration: underline;
}

.cover-tag {
  margin-top: 4px;
}

.category-index,
.latest-updates,
.ranking-digest,
.featured-topics,
.guide-steps,
.catalog-note,
.faq-digest {
  padding: 44px 0;
  border-bottom: 1px solid var(--rule);
}

.category-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0 28px;
}

.category-item {
  border-bottom: 1px solid var(--rule);
}

.category-item a {
  display: block;
  padding: 12px 0;
  text-decoration: none;
}

.category-item a:hover .cat-name {
  color: var(--teal);
  text-decoration: underline;
}

.cat-name {
  display: block;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.6;
}

.cat-desc {
  display: block;
  margin-top: 2px;
  font-family: var(--sans);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.update-table {
  width: 100%;
  font-size: 15px;
}

.update-table th {
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-soft);
  text-align: left;
  padding: 10px 12px 10px 0;
  border-bottom: 1px solid var(--ink-soft);
}

.update-table td {
  padding: 12px 12px 12px 0;
  border-bottom: 1px solid var(--rule);
  vertical-align: top;
  line-height: 1.75;
}

.update-table tbody tr:hover {
  background-color: rgba(31, 75, 87, 0.04);
}

.update-table td:first-child {
  font-family: var(--sans);
  font-size: 13px;
  color: var(--ink-soft);
  white-space: nowrap;
}

.ranking-columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
}

.ranking-group h3 {
  font-size: 17px;
  margin: 0 0 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--rule);
}

.rank-list {
  display: flex;
  flex-direction: column;
}

.rank-item {
  border-bottom: 1px solid var(--rule);
}

.rank-item:last-child {
  border-bottom: none;
}

.rank-item a {
  display: flex;
  gap: 12px;
  padding: 10px 0;
  text-decoration: none;
  color: var(--ink);
}

.rank-item a:hover .rank-name {
  color: var(--teal);
  text-decoration: underline;
}

.rank-no {
  flex: none;
  font-family: var(--sans);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ochre);
  padding-top: 4px;
}

.rank-name {
  display: block;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.7;
}

.rank-note {
  display: block;
  margin-top: 2px;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.topic-block {
  display: grid;
  grid-template-columns: minmax(0, 46fr) minmax(0, 54fr);
  gap: 30px;
  padding: 26px 0;
  border-bottom: 1px solid var(--rule);
}

.topic-block:last-of-type {
  border-bottom: none;
}

.topic-figure img {
  width: 100%;
  height: 230px;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--rule);
}

.topic-body h3 {
  font-size: 19px;
  margin: 0 0 10px;
}

.topic-feature {
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink);
  margin: 0 0 14px;
}

.topic-entries {
  margin: 0 0 12px;
}

.topic-entries li {
  padding: 8px 0;
  border-top: 1px solid var(--rule);
  font-size: 15px;
  line-height: 1.75;
}

.topic-entries a {
  color: var(--teal);
  text-decoration: underline;
}

.entry-note {
  display: inline-block;
  margin-left: 8px;
  font-family: var(--sans);
  font-size: 12.5px;
  color: var(--ink-soft);
}

.topic-footnote {
  font-family: var(--sans);
  font-size: 12.5px;
  color: var(--ink-soft);
  margin: 0;
}

.step-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
}

.step-block {
  border-top: 2px solid var(--teal);
  padding-top: 14px;
}

.step-no {
  font-family: var(--sans);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--ochre);
  margin: 0 0 6px;
  text-transform: uppercase;
}

.step-block h3 {
  font-size: 17px;
  margin: 0 0 8px;
}

.step-desc {
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink);
  margin: 0 0 10px;
}

.step-check {
  font-family: var(--sans);
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--ink-soft);
  border-top: 1px solid var(--rule);
  padding-top: 8px;
  margin: 0;
}

/* ==========================================================
   pages — comics
   ========================================================== */

.category-map {
  padding: 34px 0;
  border-bottom: 1px solid var(--rule);
}

.category-columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0 32px;
}

.category-list {
  margin: 0;
}

.category-item {
  padding: 10px 0;
  border-bottom: 1px solid var(--rule);
}

.category-item a {
  display: block;
  font-size: 15.5px;
  font-weight: 600;
  color: var(--teal);
  text-decoration: underline;
}

.category-desc {
  display: block;
  margin-top: 4px;
  font-family: var(--sans);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.entry-table {
  padding: 34px 0;
  border-bottom: 1px solid var(--rule);
}

.entry-row {
  border-bottom: 1px solid var(--rule);
}

.entry-row:first-of-type {
  border-top: 1px solid var(--rule);
}

.entry-link {
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr);
  gap: 20px;
  align-items: start;
  padding: 16px 0;
  text-decoration: none;
  color: var(--ink);
  transition: background-color 0.16s ease;
}

.entry-link:hover {
  background-color: rgba(31, 75, 87, 0.04);
}

.entry-link:hover .entry-title {
  color: var(--teal);
  text-decoration: underline;
}

.entry-cover {
  margin: 0;
}

.entry-cover img {
  width: 76px;
  height: 104px;
  object-fit: cover;
  border-radius: 4px;
  border: 1px solid var(--rule);
}

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

.entry-title {
  font-size: 17px;
  font-weight: 600;
  margin: 0 0 6px;
  line-height: 1.6;
}

.entry-tag {
  margin: 0 8px 6px 0;
}

.entry-status,
.entry-chapter,
.entry-date {
  display: inline-block;
  margin: 0 16px 0 0;
  font-family: var(--sans);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.collect-note {
  padding: 34px 0;
  border-bottom: 1px solid var(--rule);
}

.related-row {
  padding: 30px 0;
}

.related-title {
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin: 0 0 12px;
}

.related-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
}

.related-links li {
  font-size: 15px;
}

.related-links a {
  color: var(--teal);
  text-decoration: underline;
}

/* ==========================================================
   pages — topics
   ========================================================== */

.topic-index {
  padding: 34px 0;
  border-bottom: 1px solid var(--rule);
}

.topic-index-list {
  max-width: var(--col-main);
}

.topic-index-item {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr) 100px;
  gap: 4px 16px;
  align-items: baseline;
  padding: 14px 0;
  border-bottom: 1px solid var(--rule);
}

.topic-num {
  font-family: var(--sans);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ochre);
}

.topic-link {
  font-size: 16.5px;
  font-weight: 600;
  color: var(--ink);
  text-decoration: none;
}

.topic-link:hover {
  color: var(--teal);
  text-decoration: underline;
}

.topic-partition {
  justify-self: start;
}

.topic-note {
  grid-column: 2 / -1;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.topic-detail {
  padding: 34px 0;
  border-bottom: 1px solid var(--rule);
}

.topic-detail .topic-block {
  grid-template-columns: minmax(0, 46fr) minmax(0, 54fr);
  padding: 30px 0;
}

.topic-media {
  min-width: 0;
}

.topic-media .topic-figure img {
  width: 100%;
  height: 260px;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--rule);
}

.topic-caption {
  margin-top: 8px;
}

.topic-summary {
  min-width: 0;
}

.topic-partition-label {
  margin-bottom: 10px;
}

.topic-summary h3 {
  font-size: 20px;
  margin: 0 0 12px;
}

.topic-summary p {
  font-size: 15.5px;
  line-height: 1.85;
  margin: 0 0 14px;
}

.topic-subtitle {
  font-family: var(--sans);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin: 18px 0 8px;
}

.topic-feature-list {
  margin: 0 0 8px;
}

.topic-feature-list li {
  position: relative;
  padding: 6px 0 6px 16px;
  font-size: 15px;
  line-height: 1.8;
  border-bottom: 1px solid var(--rule);
}

.topic-feature-list li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--ochre);
}

.topic-entry-list {
  margin: 0 0 8px;
}

.topic-entry-item {
  padding: 8px 0;
  border-bottom: 1px solid var(--rule);
  font-size: 15px;
  line-height: 1.75;
}

.topic-entry-item a {
  color: var(--teal);
  text-decoration: underline;
}

.topic-note {
  padding: 34px 0;
}

.topic-note .note-list {
  max-width: var(--col-main);
  counter-reset: topicnote;
}

.topic-note .note-item {
  position: relative;
  padding-left: 34px;
}

.topic-note .note-item::before {
  counter-increment: topicnote;
  content: counter(topicnote);
  position: absolute;
  left: 0;
  top: 12px;
  font-family: var(--sans);
  font-size: 12px;
  color: var(--ochre);
}

/* ==========================================================
   pages — updates
   ========================================================== */

.change-types {
  padding: 34px 0;
  border-bottom: 1px solid var(--rule);
}

.type-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
}

.type-item {
  border-top: 2px solid var(--teal);
  padding-top: 12px;
}

.type-name {
  font-size: 16px;
  margin: 0 0 6px;
}

.type-desc {
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
  margin: 0;
}

.update-stream {
  padding: 34px 0;
  border-bottom: 1px solid var(--rule);
}

.stream-day {
  margin-bottom: 26px;
}

.stream-date {
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--ochre);
  margin: 0 0 8px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--ink-soft);
}

.stream-row {
  display: grid;
  grid-template-columns: 100px minmax(0, 1.4fr) minmax(0, 1fr) 100px 90px;
  gap: 6px 16px;
  align-items: baseline;
  padding: 12px 0;
  border-bottom: 1px solid var(--rule);
  font-size: 15px;
  line-height: 1.7;
}

.stream-row:hover {
  background-color: rgba(31, 75, 87, 0.04);
}

.stream-work {
  font-weight: 600;
  color: var(--teal);
  text-decoration: underline;
}

.stream-chapter,
.stream-status {
  font-family: var(--sans);
  font-size: 12.5px;
  color: var(--ink-soft);
}

.follow-steps {
  padding: 34px 0;
  border-bottom: 1px solid var(--rule);
}

.step-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
}

.step-item {
  border-top: 2px solid var(--teal);
  padding-top: 12px;
}

.step-num {
  display: block;
  font-family: var(--sans);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--ochre);
  margin-bottom: 6px;
}

.step-title {
  font-size: 17px;
  margin: 0 0 8px;
}

.updates-media {
  padding: 34px 0 0;
}

.updates-media img {
  width: 100%;
  height: 280px;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--rule);
}

/* ==========================================================
   pages — ranking
   ========================================================== */

.criteria {
  padding: 34px 0;
  border-bottom: 1px solid var(--rule);
}

.criteria-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
  margin-top: 18px;
}

.criteria-item {
  border-top: 2px solid var(--ochre);
  padding-top: 12px;
}

.criteria-name {
  font-size: 16px;
  margin: 0 0 6px;
}

.criteria-item p {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
  margin: 0;
}

.dimension {
  padding: 34px 0;
  border-bottom: 1px solid var(--rule);
}

.dimension .rank-list {
  max-width: var(--col-main);
}

.dimension .rank-item a {
  align-items: flex-start;
}

.mapping {
  padding: 34px 0;
  border-bottom: 1px solid var(--rule);
}

.mapping-lead {
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink);
  max-width: var(--col-main);
  margin: 0 0 18px;
}

.mapping-list {
  max-width: var(--col-main);
  margin-bottom: 26px;
}

.mapping-item {
  padding: 12px 0;
  border-bottom: 1px solid var(--rule);
  font-size: 15.5px;
  line-height: 1.8;
}

.mapping-figure img {
  width: 100%;
  height: 260px;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--rule);
}

.footnotes {
  padding: 34px 0;
  border-bottom: 1px solid var(--rule);
}

.related {
  padding: 30px 0 0;
}

.related-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
}

.related-list li {
  font-size: 15px;
}

.related-list a {
  color: var(--teal);
  text-decoration: underline;
}

/* ==========================================================
   pages — guide
   ========================================================== */

.page-layout,
.guide-layout {
  display: grid;
  grid-template-columns: minmax(0, 62fr) minmax(0, 32fr);
  column-gap: 6%;
  align-items: start;
  padding: 34px 0;
  border-bottom: 1px solid var(--rule);
}

.guide-main {
  min-width: 0;
}

.guide-aside {
  min-width: 0;
  display: grid;
  gap: 24px;
}

.guide-goal,
.guide-steps,
.reading-routes {
  margin-bottom: 34px;
}

.guide-goal h2,
.guide-steps h2,
.reading-routes h2 {
  font-size: 20px;
  margin: 0 0 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--rule);
}

.goal-list {
  margin: 0;
}

.goal-item {
  position: relative;
  padding: 10px 0 10px 20px;
  border-bottom: 1px solid var(--rule);
  font-size: 15.5px;
  line-height: 1.85;
}

.goal-item::before {
  content: "·";
  position: absolute;
  left: 4px;
  color: var(--ochre);
  font-weight: 700;
}

.step-flow {
  margin: 0;
}

.step-flow .step-block {
  border-top: none;
  border-bottom: 1px solid var(--rule);
  padding: 18px 0;
}

.step-flow .step-block:last-child {
  border-bottom: none;
}

.step-index {
  font-family: var(--sans);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--ochre);
  margin: 0 0 6px;
  text-transform: uppercase;
}

.step-flow .step-title {
  font-size: 17px;
  margin: 0 0 8px;
}

.step-body {
  font-size: 15.5px;
  line-height: 1.85;
  margin: 0 0 10px;
  max-width: 100%;
}

.step-flow .step-check {
  font-family: var(--sans);
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--ink-soft);
  border-top: 1px solid var(--rule);
  padding-top: 8px;
  margin: 0;
}

.route-columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  align-items: start;
}

.route-card {
  border-top: 2px solid var(--teal);
  padding-top: 12px;
  min-width: 0;
}

.route-name {
  font-size: 16px;
  margin: 0 0 8px;
}

.route-goal,
.route-plan,
.route-tag {
  display: block;
  font-size: 14.5px;
  line-height: 1.8;
  margin: 0 0 8px;
  min-width: 0;
  white-space: normal;
  word-break: break-word;
}

.route-goal {
  color: var(--ink);
}

.route-plan {
  color: var(--ink-soft);
  font-family: var(--sans);
  font-size: 13px;
}

.route-tag {
  background-color: var(--tag-ochre);
  color: var(--ochre);
  margin-bottom: 0;
}

.aside-box {
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 16px 18px;
  background-color: rgba(31, 75, 87, 0.03);
}

.aside-title {
  font-family: var(--sans);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin: 0 0 10px;
}

.aside-list {
  margin: 0;
}

.aside-item {
  padding: 8px 0;
  border-bottom: 1px solid var(--rule);
  font-size: 14.5px;
  line-height: 1.8;
}

.aside-item:last-child {
  border-bottom: none;
}

.aside-item a {
  color: var(--teal);
  text-decoration: underline;
}

.guide-media {
  padding: 34px 0;
  border-bottom: 1px solid var(--rule);
}

.guide-media h2 {
  font-size: 20px;
  margin: 0 0 14px;
}

.media-figure img {
  width: 100%;
  height: 300px;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--rule);
}

.footnote-section {
  padding: 34px 0;
  border-bottom: 1px solid var(--rule);
}

.footnote-section h2 {
  font-size: 20px;
  margin: 0 0 14px;
}

.related-links {
  padding: 30px 0 0;
}

.related-links .related-title {
  margin-bottom: 12px;
}

.related-links .related-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
}

.related-item {
  font-size: 15px;
}

.related-item a {
  color: var(--teal);
  text-decoration: underline;
}

/* ==========================================================
   pages — faq
   ========================================================== */

.faq-figure {
  padding: 26px 0;
  border-bottom: 1px solid var(--rule);
}

.faq-figure img {
  width: 100%;
  max-width: var(--col-main);
  height: 260px;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--rule);
}

.faq-group {
  padding: 34px 0;
  border-bottom: 1px solid var(--rule);
}

.faq-group h2 {
  font-size: 20px;
  margin: 0 0 6px;
}

.next-step {
  padding: 34px 0;
  border-bottom: 1px solid var(--rule);
}

.next-step-intro {
  font-size: 15.5px;
  color: var(--ink-soft);
  margin: 0 0 14px;
  max-width: var(--col-main);
}

.next-step-list {
  max-width: var(--col-main);
}

.next-step-item {
  padding: 12px 0;
  border-bottom: 1px solid var(--rule);
  font-size: 15.5px;
}

.next-step-item a {
  color: var(--teal);
  text-decoration: underline;
}

.footnote-block {
  padding: 34px 0 0;
}

.footnote-block h2 {
  font-size: 20px;
  margin: 0 0 14px;
}

/* ==========================================================
   pages — feedback
   ========================================================== */

.fixable-types,
.submit-info,
.process,
.out-of-scope {
  padding: 34px 0;
  border-bottom: 1px solid var(--rule);
}

.fixable-types h2,
.submit-info h2,
.process h2,
.out-of-scope h2 {
  font-size: 20px;
  margin: 0 0 8px;
}

.section-media {
  margin: 18px 0 22px;
}

.section-media img {
  width: 100%;
  max-width: var(--col-main);
  height: 260px;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--rule);
}

.fixable-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 32px;
}

.fixable-list {
  margin: 0;
}

.fixable-item {
  padding: 12px 0;
  border-bottom: 1px solid var(--rule);
}

.fixable-name {
  font-size: 16px;
  margin: 0 0 4px;
}

.fixable-desc {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
  margin: 0;
}

.submit-steps {
  max-width: var(--col-main);
  counter-reset: submit;
}

.submit-step {
  position: relative;
  padding: 14px 0 14px 40px;
  border-bottom: 1px solid var(--rule);
}

.submit-step::before {
  counter-increment: submit;
  content: counter(submit);
  position: absolute;
  left: 0;
  top: 16px;
  font-family: var(--sans);
  font-size: 12px;
  color: var(--ochre);
}

.submit-step-name {
  font-size: 16px;
  margin: 0 0 4px;
}

.submit-step-desc {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
  margin: 0;
}

.process-list {
  max-width: var(--col-main);
}

.process-step {
  position: relative;
  padding: 16px 0 16px 44px;
  border-bottom: 1px solid var(--rule);
}

.process-num {
  position: absolute;
  left: 0;
  top: 18px;
  font-family: var(--sans);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ochre);
}

.process-step-name {
  font-size: 16px;
  margin: 0 0 4px;
}

.process-step-desc {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
  margin: 0;
}

.scope-list {
  max-width: var(--col-main);
}

.scope-item {
  padding: 12px 0;
  border-bottom: 1px solid var(--rule);
}

.scope-name {
  font-size: 16px;
  margin: 0 0 4px;
}

.scope-desc {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
  margin: 0;
}

.related {
  padding: 30px 0 0;
}

.related h2 {
  font-size: 20px;
  margin: 0 0 12px;
}

.related-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
}

/* ==========================================================
   pages — 404
   ========================================================== */

.site-error .site-main {
  padding-top: 40px;
}

.error-main {
  max-width: var(--content-max);
  margin: 0 auto;
}

.error-panel {
  max-width: var(--col-main);
  padding: 40px 0 60px;
}

.error-code {
  font-family: var(--sans);
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--ochre);
  margin: 0 0 12px;
}

.error-panel h1 {
  font-size: 28px;
  margin: 0 0 14px;
}

.error-lead {
  font-size: 16px;
  line-height: 1.9;
  color: var(--ink-soft);
  margin: 0 0 22px;
}

.error-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
}

.error-links li {
  font-size: 15px;
}

.error-links a {
  color: var(--teal);
  text-decoration: underline;
}

/* ==========================================================
   responsive — 1080px
   ========================================================== */

@media (max-width: 1080px) {
  .hero {
    gap: 32px;
  }

  .hero-lead h1 {
    font-size: 30px;
  }

  .category-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .ranking-columns,
  .step-row,
  .type-grid,
  .criteria-list,
  .step-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
  }

  .category-columns {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .stream-row {
    grid-template-columns: 90px minmax(0, 1.4fr) minmax(0, 1fr) 90px;
  }

  .stream-row .stream-status {
    grid-column: 2 / -1;
  }
}

/* ==========================================================
   responsive — 760px
   ========================================================== */

@media (max-width: 760px) {
  body {
    font-size: 16px;
  }

  .site-header {
    padding: 0;
  }

  .brand-block {
    padding: 16px 18px 10px;
  }

  .brand-link {
    font-size: 19px;
  }

  .brand-slogan {
    font-size: 12px;
  }

  .site-nav {
    padding: 0 18px 14px;
  }

  .nav-list {
    gap: 2px 14px;
  }

  .nav-item a {
    font-size: 13.5px;
    padding: 8px 0;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
  }

  .header-note {
    padding: 0 18px 14px;
    font-size: 11.5px;
  }

  .site-main {
    padding: 0 18px 44px;
  }

  .page-title {
    font-size: 23px;
  }

  .hero {
    grid-template-columns: minmax(0, 1fr);
    gap: 26px;
    padding: 22px 0 32px;
  }

  .hero-lead h1 {
    font-size: 26px;
  }

  .hero-figure img {
    height: 200px;
  }

  .cover-strip {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
  }

  .cover-item img {
    height: 96px;
  }

  .cover-title {
    font-size: 13px;
  }

  .category-index,
  .latest-updates,
  .ranking-digest,
  .featured-topics,
  .guide-steps,
  .catalog-note,
  .faq-digest,
  .category-map,
  .entry-table,
  .collect-note,
  .topic-index,
  .topic-detail,
  .change-types,
  .update-stream,
  .follow-steps,
  .criteria,
  .dimension,
  .mapping,
  .footnotes,
  .faq-group,
  .next-step,
  .fixable-types,
  .submit-info,
  .process,
  .out-of-scope,
  .guide-media,
  .footnote-section {
    padding: 28px 0;
  }

  .category-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 18px;
  }

  .ranking-columns,
  .step-row,
  .type-grid,
  .criteria-list,
  .step-list,
  .category-columns {
    grid-template-columns: minmax(0, 1fr);
    gap: 22px;
  }

  .topic-block,
  .topic-detail .topic-block {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
  }

  .topic-figure img,
  .topic-media .topic-figure img {
    height: 200px;
  }

  .update-table thead {
    display: none;
  }

  .update-table,
  .update-table tbody,
  .update-table tr,
  .update-table td {
    display: block;
    width: 100%;
  }

  .update-table tr {
    padding: 12px 0;
    border-bottom: 1px solid var(--rule);
  }

  .update-table td {
    padding: 2px 0;
    border-bottom: none;
  }

  .entry-link {
    grid-template-columns: 64px minmax(0, 1fr);
    gap: 14px;
  }

  .entry-cover img {
    width: 64px;
    height: 88px;
  }

  .entry-status,
  .entry-chapter,
  .entry-date {
    display: block;
    margin: 2px 0 0;
  }

  .topic-index-item {
    grid-template-columns: 32px minmax(0, 1fr);
    row-gap: 6px;
  }

  .topic-partition {
    grid-column: 2;
    justify-self: start;
  }

  .topic-note {
    grid-column: 2;
  }

  .stream-row {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 4px 12px;
  }

  .stream-row .stream-type,
  .stream-row .stream-work,
  .stream-row .stream-chapter,
  .stream-row .stream-tag,
  .stream-row .stream-status {
    grid-column: auto;
  }

  .stream-row .stream-work {
    grid-column: 1 / -1;
    font-size: 15.5px;
  }

  .stream-row .stream-chapter,
  .stream-row .stream-tag,
  .stream-row .stream-status {
    font-size: 12px;
  }

  .page-layout,
  .guide-layout {
    grid-template-columns: minmax(0, 1fr);
    row-gap: 30px;
    padding: 26px 0;
  }

  .guide-aside {
    order: 2;
  }

  .route-columns {
    grid-template-columns: minmax(0, 1fr);
    gap: 18px;
  }

  .route-goal,
  .route-plan,
  .route-tag {
    font-size: 14px;
    min-width: 0;
  }

  .fixable-columns {
    grid-template-columns: minmax(0, 1fr);
    gap: 0;
  }

  .faq-figure img,
  .section-media img,
  .updates-media img,
  .guide-media img,
  .mapping-figure img {
    height: 200px;
  }

  .footer-columns {
    grid-template-columns: minmax(0, 1fr);
    gap: 26px;
  }

  .footer-links li {
    font-size: 14.5px;
  }
}

/* ==========================================================
   responsive — 480px
   ========================================================== */

@media (max-width: 480px) {
  body {
    font-size: 15.5px;
  }

  .site-main {
    padding: 0 14px 40px;
  }

  .brand-block,
  .site-nav,
  .header-note {
    padding-left: 14px;
    padding-right: 14px;
  }

  .brand-link {
    font-size: 18px;
  }

  .hero-lead h1 {
    font-size: 24px;
  }

  .page-title {
    font-size: 22px;
  }

  .hero-figure img {
    height: 170px;
  }

  .cover-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .cover-item img {
    height: 110px;
  }

  .category-row {
    grid-template-columns: minmax(0, 1fr);
  }

  .entry-link {
    grid-template-columns: 56px minmax(0, 1fr);
    gap: 12px;
  }

  .entry-cover img {
    width: 56px;
    height: 78px;
  }

  .entry-title {
    font-size: 16px;
  }

  .topic-figure img,
  .topic-media .topic-figure img,
  .faq-figure img,
  .section-media img,
  .updates-media img,
  .guide-media img,
  .mapping-figure img {
    height: 170px;
  }

  .btn-primary,
  .btn-ghost {
    flex: 1 1 auto;
    text-align: center;
  }

  .related-links,
  .related-list,
  .error-links {
    flex-direction: column;
    gap: 8px;
  }

  .footer-columns {
    gap: 22px;
  }
}

/* ==========================================================
   motion — 减少动态效果
   ========================================================== */

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}