:root {
  --paper: #faf7f2;
  --paper-deep: #f2ede4;
  --ink: #1c1a18;
  --ink-soft: #3a3733;
  --vermillion: #c0392b;
  --vermillion-deep: #9c2d21;
  --muted: #6b6560;
  --line: #ddd6cc;
  --line-strong: #c9c0b4;
  --container: 1120px;
  --prose: 720px;
  --radius: 6px;
  --shadow-soft: 0 1px 2px rgba(28, 26, 24, 0.05);
}

/* ==========================================================================
   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: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.8;
  font-variant-numeric: tabular-nums;
  text-rendering: optimizeLegibility;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  color: var(--ink);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: normal;
}

p {
  margin: 0;
}

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

a {
  color: var(--ink);
  text-decoration: none;
  transition: color 0.18s ease, border-color 0.18s ease, background-color 0.18s ease;
}

a:hover {
  color: var(--vermillion);
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--vermillion);
  outline-offset: 2px;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
  border: 0;
}

figure {
  margin: 0;
}

figcaption {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

time {
  font-variant-numeric: tabular-nums;
}

/* ==========================================================================
   layout
   ========================================================================== */

.site-body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--paper);
}

.site-main {
  flex: 1 1 auto;
  width: 100%;
}

.home-main,
.inner-main {
  width: 100%;
}

.inner-main {
  padding: 0 24px 72px;
}

.container,
.page-layout {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
}

.page-layout {
  display: block;
}

.section {
  max-width: var(--container);
  margin: 0 auto;
  padding: 44px 0;
}

.section + .section {
  border-top: 1px solid var(--line);
}

.section-title {
  font-size: 21px;
  margin-bottom: 12px;
}

.section-intro,
.section-desc {
  max-width: var(--prose);
  color: var(--ink-soft);
  font-size: 15px;
}

.section-body {
  max-width: var(--prose);
}

.section-body p + p {
  margin-top: 14px;
}

/* ==========================================================================
   header / navigation
   ========================================================================== */

.top-notice {
  background-color: var(--paper-deep);
  border-bottom: 1px solid var(--line);
  padding: 8px 24px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
  text-align: center;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background-color: var(--paper);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  gap: 24px;
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex: 0 0 auto;
  color: var(--ink);
}

.brand-name {
  font-size: 20px;
  font-weight: 700;
  line-height: 1.2;
}

.brand-note {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.4;
}

.site-nav {
  margin-left: auto;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-list li {
  display: flex;
}

.nav-list a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 14px;
  color: var(--ink-soft);
  font-size: 15px;
  border-bottom: 2px solid transparent;
}

.nav-list a:hover {
  color: var(--vermillion);
}

.nav-list a.is-current {
  color: var(--vermillion);
  font-weight: 700;
  border-bottom-color: var(--vermillion);
}

.nav-toggle {
  display: none;
  margin-left: auto;
  width: 44px;
  height: 44px;
  padding: 11px 10px;
  flex-direction: column;
  justify-content: space-between;
}

.nav-toggle-bar {
  display: block;
  height: 2px;
  width: 100%;
  background-color: var(--ink);
  border-radius: 1px;
}

/* ==========================================================================
   breadcrumb / page header (inner shell)
   ========================================================================== */

.breadcrumb {
  max-width: var(--container);
  margin: 0 auto;
  padding: 20px 0 0;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 13px;
}

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

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

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

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

.page-header {
  max-width: var(--container);
  margin: 0 auto;
  padding: 14px 0 30px;
  border-bottom: 1px solid var(--line);
}

.page-title {
  font-size: 30px;
  line-height: 1.3;
}

.page-description {
  max-width: var(--prose);
  margin-top: 10px;
  color: var(--ink-soft);
  font-size: 15px;
}

/* ==========================================================================
   footer
   ========================================================================== */

.site-footer {
  background-color: var(--paper-deep);
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
}

.footer-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 40px 24px 32px;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.2fr;
  gap: 32px;
}

.footer-about,
.footer-help {
  min-width: 0;
}

.footer-brand {
  margin-bottom: 8px;
  color: var(--ink);
  font-size: 17px;
  font-weight: 700;
}

.footer-text {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.75;
}

.footer-text + .footer-text {
  margin-top: 8px;
}

.footer-nav-title {
  margin-bottom: 10px;
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
}

.footer-nav-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-nav-list a {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  color: var(--ink-soft);
  font-size: 14px;
}

.footer-nav-list a:hover {
  color: var(--vermillion);
}

.footer-copy {
  margin-top: 14px;
  color: var(--muted);
  font-size: 13px;
}

/* ==========================================================================
   shared components
   ========================================================================== */

.tag,
.genre-tag,
.rank-tag {
  display: inline-flex;
  align-items: center;
  padding: 1px 8px;
  border: 1px solid var(--vermillion);
  border-radius: 3px;
  color: var(--vermillion);
  font-size: 13px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.status {
  display: inline-flex;
  align-items: center;
  color: var(--muted);
  font-size: 13px;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.status-updated,
.status-new,
.status-ongoing {
  color: var(--vermillion);
}

.status-steady,
.status-completed,
.status-paused {
  color: var(--muted);
}

.field-tag {
  display: inline-block;
  margin-right: 6px;
  padding: 0 6px;
  border: 1px solid var(--line-strong);
  border-radius: 3px;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.04em;
}

.column-title {
  margin-bottom: 14px;
  font-size: 17px;
}

.column-more,
.timeline-more,
.entry-link,
.error-home-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--vermillion);
  font-size: 14px;
  font-weight: 700;
}

.column-more::after,
.timeline-more::after,
.entry-link::after {
  content: " →";
  font-weight: 400;
}

.column-more:hover,
.timeline-more:hover,
.entry-link:hover {
  color: var(--vermillion-deep);
}

/* ==========================================================================
   pages: index.html
   ========================================================================== */

.hero {
  border-bottom: 1px solid var(--line);
}

.hero-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 48px 24px 36px;
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  gap: 40px;
  align-items: start;
}

.hero-lead {
  min-width: 0;
}

.hero-title {
  font-size: 30px;
  line-height: 1.35;
}

.hero-text {
  max-width: 620px;
  margin-top: 14px;
  color: var(--ink-soft);
  font-size: 16px;
}

.hero-points {
  margin-top: 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.hero-points li {
  position: relative;
  padding-left: 18px;
  color: var(--ink-soft);
  font-size: 15px;
}

.hero-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 8px;
  height: 1px;
  background-color: var(--vermillion);
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  margin-top: 22px;
  padding: 0 20px;
  background-color: var(--ink);
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  color: var(--paper);
  font-size: 15px;
  font-weight: 700;
}

.hero-cta:hover {
  background-color: var(--vermillion);
  border-color: var(--vermillion);
  color: #fff;
}

.hero-media {
  margin-top: 26px;
  min-width: 0;
}

.hero-media img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-deep);
}

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

.hero-timeline {
  grid-column: 1 / -1;
  padding: 22px 24px;
  background-color: var(--paper-deep);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.timeline-title {
  font-size: 17px;
  margin-bottom: 12px;
}

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

.timeline-item {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr) auto auto;
  align-items: center;
  gap: 14px;
  padding: 11px 0;
  border-top: 1px solid var(--line);
}

.timeline-item:first-child {
  border-top: 0;
}

.timeline-date {
  color: var(--muted);
  font-size: 13px;
}

.timeline-work {
  min-width: 0;
  color: var(--ink);
  font-size: 15px;
  font-weight: 700;
}

.timeline-more {
  margin-top: 12px;
}

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

.section-head .section-desc {
  margin-top: 8px;
}

.genre-rows {
  border-top: 1px solid var(--line);
}

.genre-row {
  display: grid;
  grid-template-columns: 150px minmax(0, 1.1fr) minmax(0, 1fr) 96px;
  align-items: baseline;
  gap: 18px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.genre-name {
  font-size: 17px;
  color: var(--ink);
}

.genre-trait {
  min-width: 0;
  color: var(--ink-soft);
  font-size: 15px;
}

.genre-samples {
  min-width: 0;
  color: var(--muted);
  font-size: 14px;
}

.genre-link {
  justify-self: end;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--vermillion);
  font-size: 14px;
  font-weight: 700;
}

.genre-link:hover {
  color: var(--vermillion-deep);
}

.coverwall-group + .coverwall-group {
  margin-top: 30px;
}

.coverwall-group-title {
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
  font-size: 17px;
}

.cover-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

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

.cover-card > a {
  display: block;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: #fff;
  overflow: hidden;
  transition: border-color 0.18s ease, transform 0.18s ease, box-shadow 0.18s ease;
}

.cover-card > a:hover {
  border-color: var(--vermillion);
  transform: translateY(-2px);
  box-shadow: var(--shadow-soft);
}

.cover-figure {
  display: flex;
  flex-direction: column;
}

.cover-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  background-color: var(--paper-deep);
  border-bottom: 1px solid var(--line);
}

.cover-name {
  padding: 10px 12px 2px;
  color: var(--ink);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.5;
}

.cover-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 6px 12px 12px;
}

.update-rank-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: 36px;
  align-items: start;
}

.update-column,
.rank-column {
  min-width: 0;
}

.month-group + .month-group {
  margin-top: 18px;
}

.month-head {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
  color: var(--ink);
  font-size: 15px;
  font-weight: 700;
}

.month-date {
  color: var(--ink);
}

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

.month-item {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
}

.month-work {
  min-width: 0;
  color: var(--ink-soft);
  font-size: 15px;
}

.rank-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--line);
}

.rank-item {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
}

.rank-pos {
  color: var(--vermillion);
  font-size: 15px;
  font-weight: 700;
  text-align: center;
}

.rank-work {
  min-width: 0;
  color: var(--ink);
  font-size: 15px;
  font-weight: 700;
}

.rank-note {
  grid-column: 2 / -1;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}

.guide-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 36px;
  align-items: start;
}

.guide-fields,
.guide-boundary {
  min-width: 0;
}

.field-table {
  margin: 0;
  border-top: 1px solid var(--line);
}

.field-table dt {
  padding-top: 12px;
  color: var(--ink);
  font-size: 15px;
  font-weight: 700;
}

.field-table dd {
  margin: 4px 0 0;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 14px;
}

.guide-boundary p {
  color: var(--ink-soft);
  font-size: 15px;
}

.guide-boundary p + p {
  margin-top: 12px;
}

.guide-boundary .column-more {
  margin-top: 10px;
}

.site-index-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.site-index-item {
  min-width: 0;
}

.site-index-item a {
  display: flex;
  flex-direction: column;
  gap: 6px;
  height: 100%;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: #fff;
  transition: border-color 0.18s ease, transform 0.18s ease;
}

.site-index-item a:hover {
  border-color: var(--vermillion);
  transform: translateY(-2px);
}

.index-name {
  color: var(--ink);
  font-size: 16px;
  font-weight: 700;
}

.index-desc {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}

/* ==========================================================================
   pages: yymh/timan-fenlei.html
   ========================================================================== */

.section-division-basis .section-body {
  margin-top: 6px;
}

.section-genre-detail .section-intro {
  margin-bottom: 20px;
}

.section-genre-detail .genre-row {
  grid-template-columns: 220px minmax(0, 1fr);
  align-items: start;
}

.genre-row-label {
  min-width: 0;
}

.genre-row-label .genre-name {
  font-size: 17px;
}

.genre-row-label .genre-trait {
  margin-top: 6px;
  color: var(--muted);
  font-size: 14px;
}

.genre-row-content {
  min-width: 0;
}

.genre-organize {
  color: var(--ink-soft);
  font-size: 15px;
}

.genre-represent {
  margin-top: 10px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  font-size: 14px;
}

.genre-represent a {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  color: var(--vermillion);
  border-bottom: 1px solid var(--line-strong);
}

.genre-represent a:hover {
  border-bottom-color: var(--vermillion);
}

.genre-map-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.genre-map-grid .cover-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: #fff;
  overflow: hidden;
  transition: border-color 0.18s ease, transform 0.18s ease;
}

.genre-map-grid .cover-card:hover {
  border-color: var(--vermillion);
  transform: translateY(-2px);
}

.cover-card-link {
  display: block;
}

.cover-card-link img {
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  background-color: var(--paper-deep);
  border-bottom: 1px solid var(--line);
}

.cover-card-name {
  display: block;
  padding: 10px 12px 4px;
  color: var(--ink);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.5;
}

.cover-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 4px 12px 12px;
}

.cover-card-status {
  color: var(--muted);
  font-size: 13px;
  white-space: nowrap;
}

.section-path .path-list {
  margin-top: 16px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

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

.path-item a {
  display: block;
  height: 100%;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: #fff;
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.75;
  transition: border-color 0.18s ease, transform 0.18s ease;
}

.path-item a:hover {
  border-color: var(--vermillion);
  transform: translateY(-2px);
}

/* ==========================================================================
   pages: yymh/zuijin-gengxin.html
   ========================================================================== */

.update-intro {
  max-width: var(--container);
  margin: 0 auto;
  padding: 34px 0 8px;
}

.update-intro h2 {
  font-size: 21px;
  margin-bottom: 12px;
}

.update-intro p {
  max-width: var(--prose);
  color: var(--ink-soft);
  font-size: 15px;
}

.update-intro p + p {
  margin-top: 12px;
}

.update-media {
  margin-top: 22px;
}

.update-media img {
  width: 100%;
  height: auto;
  max-height: 320px;
  aspect-ratio: 16 / 7;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-deep);
}

.update-media figcaption {
  margin-top: 8px;
}

.update-timeline {
  max-width: var(--container);
  margin: 0 auto;
  padding: 34px 0 8px;
}

.update-timeline > h2 {
  font-size: 21px;
  margin-bottom: 18px;
}

.update-timeline .month-group + .month-group {
  margin-top: 26px;
}

.update-timeline .month-head {
  justify-content: space-between;
  font-size: 16px;
}

.month-count {
  color: var(--muted);
  font-size: 13px;
  font-weight: 400;
}

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

.update-item {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.update-date {
  color: var(--muted);
  font-size: 13px;
  padding-top: 3px;
}

.update-body {
  min-width: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
}

.update-title {
  color: var(--ink);
  font-size: 16px;
  font-weight: 700;
}

.update-title:hover {
  color: var(--vermillion);
}

.timeline-map {
  max-width: var(--container);
  margin: 0 auto;
  padding: 34px 0 0;
}

.timeline-map h2 {
  font-size: 21px;
  margin-bottom: 14px;
}

.map-media {
  max-width: var(--prose);
  margin-bottom: 18px;
}

.map-media img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-deep);
}

.map-media figcaption {
  margin-top: 8px;
}

.timeline-map p {
  max-width: var(--prose);
  color: var(--ink-soft);
  font-size: 15px;
}

.timeline-map p + p {
  margin-top: 12px;
}

.section-entry {
  margin-top: 14px;
}

/* ==========================================================================
   pages: yymh/bangdan-paihang.html
   ========================================================================== */

.section-rank-basis .section-intro,
.section-rank-list .section-intro,
.section-rank-media .section-intro,
.section-rank-relate .section-intro {
  margin-bottom: 20px;
}

.basis-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.basis-item {
  min-width: 0;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: #fff;
}

.basis-name {
  margin-bottom: 10px;
  font-size: 16px;
}

.basis-line {
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.75;
}

.basis-line + .basis-line {
  margin-top: 8px;
}

.rank-block + .rank-block {
  margin-top: 30px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
}

.rank-block-title {
  margin-bottom: 12px;
  font-size: 17px;
}

.rank-rows {
  border-top: 1px solid var(--line);
}

.rank-row {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.rank-row .rank-pos {
  padding-top: 2px;
  color: var(--vermillion);
  font-size: 16px;
  font-weight: 700;
  text-align: center;
}

.rank-body {
  min-width: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
}

.rank-entry {
  color: var(--ink);
  font-size: 16px;
  font-weight: 700;
}

.rank-entry:hover {
  color: var(--vermillion);
}

.rank-body .rank-note {
  flex: 1 1 100%;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.75;
}

.section-rank-media .rank-figure {
  margin-bottom: 18px;
}

.section-rank-media .rank-figure:last-child {
  margin-bottom: 0;
}

.rank-figure {
  max-width: var(--prose);
}

.rank-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-deep);
}

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

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

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

.relate-item a {
  display: block;
  height: 100%;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: #fff;
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.75;
  transition: border-color 0.18s ease, transform 0.18s ease;
}

.relate-item a:hover {
  border-color: var(--vermillion);
  transform: translateY(-2px);
}

.relate-actions {
  margin-top: 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 26px;
}

/* ==========================================================================
   pages: yymh/yuedu-shuoming.html
   ========================================================================== */

.page-layout .section {
  padding: 40px 0;
}

.field-section .section-intro,
.boundary-section .section-intro,
.feedback-section .section-intro {
  margin-bottom: 20px;
}

.field-figure {
  max-width: var(--prose);
  margin-bottom: 22px;
}

.field-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-deep);
}

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

.field-list {
  max-width: var(--prose);
  border-top: 1px solid var(--line);
}

.field-item {
  border-bottom: 1px solid var(--line);
}

.field-summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  padding: 14px 0;
  cursor: pointer;
  list-style: none;
}

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

.field-summary::after {
  content: "展开";
  margin-left: auto;
  color: var(--vermillion);
  font-size: 13px;
  font-weight: 700;
}

.field-item[open] .field-summary::after {
  content: "收起";
}

.field-name {
  color: var(--ink);
  font-size: 16px;
  font-weight: 700;
}

.field-brief {
  color: var(--muted);
  font-size: 14px;
}

.field-detail {
  padding: 0 0 16px;
  color: var(--ink-soft);
  font-size: 15px;
}

.boundary-list {
  max-width: var(--prose);
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.boundary-block {
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--vermillion);
  border-radius: 0 var(--radius) var(--radius) 0;
  background-color: #fff;
}

.boundary-heading {
  margin-bottom: 8px;
  font-size: 16px;
}

.boundary-text {
  color: var(--ink-soft);
  font-size: 15px;
}

.feedback-steps {
  max-width: var(--prose);
  display: flex;
  flex-direction: column;
  gap: 16px;
  counter-reset: feedback;
}

.feedback-step {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  column-gap: 14px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: #fff;
}

.step-index {
  grid-row: 1 / 3;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border: 1px solid var(--vermillion);
  border-radius: 50%;
  color: var(--vermillion);
  font-size: 14px;
  font-weight: 700;
}

.step-title {
  font-size: 16px;
  margin-bottom: 6px;
}

.step-text {
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.75;
}

/* ==========================================================================
   pages: 404.html
   ========================================================================== */

.error-main {
  padding: 0 24px 72px;
}

.error-block {
  max-width: var(--container);
  margin: 0 auto;
  padding: 56px 0 0;
}

.error-inner {
  max-width: var(--prose);
  padding: 32px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: #fff;
}

.error-code {
  color: var(--vermillion);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.error-title {
  margin-top: 8px;
  font-size: 30px;
}

.error-text {
  margin-top: 12px;
  color: var(--ink-soft);
  font-size: 15px;
}

.error-list {
  margin-top: 20px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 20px;
}

.error-list a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--ink-soft);
  border-bottom: 1px solid var(--line);
  font-size: 15px;
}

.error-list a:hover {
  color: var(--vermillion);
  border-bottom-color: var(--vermillion);
}

.error-home-link {
  margin-top: 20px;
  padding: 0 20px;
  background-color: var(--ink);
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  color: var(--paper);
}

.error-home-link:hover {
  background-color: var(--vermillion);
  border-color: var(--vermillion);
  color: #fff;
}

/* ==========================================================================
   responsive
   ========================================================================== */

@media (max-width: 900px) {
  .inner-main {
    padding: 0 20px 60px;
  }

  .header-inner {
    flex-wrap: wrap;
    gap: 12px;
    padding: 12px 20px;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    flex: 1 1 100%;
    margin-left: 0;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 6px 0 10px;
    border-top: 1px solid var(--line);
  }

  .nav-list.is-open {
    display: flex;
  }

  .nav-list li {
    display: block;
  }

  .nav-list a {
    width: 100%;
    min-height: 48px;
    padding: 0 6px;
    border-bottom: 1px solid var(--line);
  }

  .nav-list a.is-current {
    border-bottom-color: var(--vermillion);
  }

  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
    padding: 36px 20px 30px;
  }

  .hero-timeline {
    grid-column: auto;
  }

  .genre-row {
    grid-template-columns: 140px minmax(0, 1fr);
    gap: 8px 16px;
  }

  .genre-samples {
    grid-column: 2 / -1;
  }

  .genre-link {
    grid-column: 2 / -1;
    justify-self: start;
    min-height: 40px;
  }

  .update-rank-grid,
  .guide-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 30px;
  }

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

  .section-genre-detail .genre-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 10px;
  }

  .genre-map-grid,
  .basis-grid,
  .relate-list,
  .section-path .path-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 26px;
    padding: 34px 20px 28px;
  }

  .footer-nav-list {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 6px 20px;
  }
}

@media (max-width: 600px) {
  body {
    font-size: 15px;
  }

  .top-notice {
    padding: 8px 16px;
    font-size: 12px;
  }

  .header-inner {
    padding: 12px 16px;
  }

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

  .inner-main {
    padding: 0 16px 48px;
  }

  .breadcrumb {
    padding-top: 16px;
  }

  .page-header {
    padding: 12px 0 22px;
  }

  .page-title,
  .hero-title,
  .error-title {
    font-size: 24px;
  }

  .hero-inner {
    padding: 28px 16px 26px;
  }

  .hero-timeline {
    padding: 18px 16px;
  }

  .timeline-item {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 4px 10px;
  }

  .timeline-date {
    grid-column: 1 / -1;
  }

  .section {
    padding: 34px 0;
  }

  .section-title,
  .update-intro h2,
  .update-timeline > h2,
  .timeline-map h2 {
    font-size: 19px;
  }

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

  .genre-samples,
  .genre-link {
    grid-column: auto;
  }

  .cover-list,
  .genre-map-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

  .month-item {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 4px 10px;
  }

  .month-date {
    grid-column: 1 / -1;
  }

  .rank-item {
    grid-template-columns: 30px minmax(0, 1fr);
    gap: 6px 10px;
  }

  .rank-item .tag {
    grid-column: 2 / -1;
    justify-self: start;
  }

  .rank-note {
    grid-column: 2 / -1;
  }

  .site-index-list,
  .basis-grid,
  .relate-list,
  .section-path .path-list,
  .error-list {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .update-date {
    padding-top: 0;
  }

  .rank-row {
    grid-template-columns: 30px minmax(0, 1fr);
    gap: 6px 10px;
  }

  .error-inner {
    padding: 22px 18px;
  }

  .footer-inner {
    padding: 30px 16px 24px;
  }
}