:root {
  --ink: #1a1a2e;
  --accent: #e63946;
  --steel: #457b9d;
  --bg: #f7f7f5;
  --card: #ffffff;
  --text: #2b2b2b;
  --muted: #6b6b76;
  --line: #dcdce0;
  --line-soft: #e8e8ea;
  --radius: 6px;
  --shadow: 0 1px 2px rgba(26, 26, 46, 0.06);
  --container: 1120px;
  --gap: 24px;
  --font: "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "SFMono-Regular", "Menlo", "Consolas", "Courier New", monospace;
}

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

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

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

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
}

h1,
h2,
h3,
h4,
p,
figure,
dl,
dd,
ol,
ul {
  margin: 0;
}

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

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

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

a:hover,
a:focus-visible {
  color: var(--accent);
}

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

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

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

.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;
}

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

.site-body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.site-main {
  flex: 1 0 auto;
  width: 100%;
}

.inner-main {
  max-width: var(--container);
  margin: 0 auto;
  padding: 24px 24px 72px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--ink);
  color: #fff;
  border-bottom: 3px solid var(--accent);
}

.header-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  color: #fff;
  padding: 14px 0;
}

.brand:hover,
.brand:focus-visible {
  color: #fff;
}

.brand-mark {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: 0;
}

.brand-tagline {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.68);
}

.site-nav {
  display: flex;
  align-items: center;
}

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

.nav-link {
  display: inline-block;
  padding: 10px 12px;
  font-size: 15px;
  color: rgba(255, 255, 255, 0.82);
  border-radius: var(--radius);
  white-space: nowrap;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
}

.nav-link.is-current {
  color: #fff;
  font-weight: 600;
  box-shadow: inset 0 -2px 0 var(--accent);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 10px;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  border-radius: var(--radius);
}

.nav-toggle:hover {
  background: rgba(255, 255, 255, 0.12);
}

.nav-toggle-bar {
  display: block;
  height: 2px;
  width: 100%;
  background: #fff;
}

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

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 16px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 28px;
}

.section-index,
.section-num {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0;
}

.section-title {
  font-size: 24px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.35;
  flex: 1 1 320px;
}

.section-lead,
.section-intro,
.section-desc {
  font-size: 15px;
  color: var(--muted);
  flex: 1 1 100%;
  max-width: 760px;
}

.section-foot {
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--line-soft);
  font-size: 15px;
}

.text-link {
  display: inline-block;
  font-weight: 600;
  color: var(--steel);
  border-bottom: 1px solid currentColor;
  padding-bottom: 1px;
}

.text-link:hover,
.text-link:focus-visible {
  color: var(--accent);
}

.tag {
  display: inline-block;
  padding: 2px 8px;
  font-size: 12px;
  line-height: 1.6;
  border-radius: 4px;
  white-space: nowrap;
}

.tag-genre {
  color: var(--steel);
  background: rgba(69, 123, 157, 0.12);
}

.tag-status {
  color: var(--accent);
  background: rgba(230, 57, 70, 0.1);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--muted);
  padding: 8px 0 20px;
}

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

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

.page-header {
  padding-bottom: 28px;
  margin-bottom: 40px;
  border-bottom: 2px solid var(--ink);
}

.page-title {
  font-size: 40px;
  font-weight: 600;
  line-height: 1.25;
  color: var(--ink);
}

.page-description {
  font-size: 15px;
  color: var(--muted);
  margin-bottom: 10px;
}

.page-summary {
  margin-top: 14px;
  font-size: 16px;
  color: var(--text);
  max-width: 820px;
}

.section {
  margin-bottom: 64px;
}

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

.site-footer {
  background: var(--ink);
  color: rgba(255, 255, 255, 0.78);
  margin-top: auto;
}

.footer-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 48px 24px 32px;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 32px;
}

.footer-brand-name {
  font-size: 18px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 8px;
}

.footer-brand-desc {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.66);
}

.footer-group-title {
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.16);
}

.footer-links li {
  margin-bottom: 8px;
}

.footer-links a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.74);
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: #fff;
}

.footer-note {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.66);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.14);
}

.footer-copy {
  max-width: var(--container);
  margin: 0 auto;
  padding: 16px 24px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.56);
}

/* ==================== index: hero ==================== */

.home-main {
  max-width: var(--container);
  margin: 0 auto;
  padding: 40px 24px 72px;
}

.hero {
  padding-bottom: 56px;
  margin-bottom: 56px;
  border-bottom: 1px solid var(--line);
}

.hero-grid {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: 40px;
  align-items: start;
}

.hero-kicker {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 12px;
}

.hero-title {
  font-size: 40px;
  font-weight: 600;
  line-height: 1.25;
  color: var(--ink);
  margin-bottom: 18px;
}

.hero-summary {
  font-size: 16px;
  color: var(--text);
  margin-bottom: 26px;
}

.hero-entry-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.hero-entry a {
  display: block;
  padding: 12px 16px;
  min-height: 44px;
  background: var(--card);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  transition: background 0.18s ease, border-color 0.18s ease;
}

.hero-entry a:hover,
.hero-entry a:focus-visible {
  background: #fff;
  border-color: var(--accent);
  color: var(--accent);
}

.hero-visual {
  margin: 0;
}

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

.hero-visual-caption {
  margin-top: 10px;
  font-size: 13px;
  color: var(--muted);
}

/* ==================== index: genre overview ==================== */

.genre-overview {
  margin-bottom: 64px;
}

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

.genre-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-top: 3px solid var(--ink);
  border-radius: var(--radius);
  padding: 20px;
}

.genre-no {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 8px;
}

.genre-name {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 10px;
}

.genre-scope,
.genre-org {
  font-size: 14px;
  color: var(--text);
  margin-bottom: 8px;
}

.genre-org {
  color: var(--muted);
  margin-bottom: 0;
}

/* ==================== index: cover grid ==================== */

.cover-grid-section {
  margin-bottom: 64px;
}

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

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

.cover-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow);
}

.cover-media,
.cover-figure {
  margin: 0;
  background: var(--line-soft);
}

.cover-media img,
.cover-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
}

.cover-name,
.cover-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  padding: 12px 14px 6px;
}

.cover-meta,
.cover-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 0 14px 14px;
}

.cover-tags {
  padding-top: 0;
}

/* ==================== index: update list ==================== */

.update-list-section {
  margin-bottom: 64px;
}

.update-batch-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.update-batch {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 22px;
}

.batch-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-soft);
  margin-bottom: 4px;
}

.batch-no {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
}

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

.update-row {
  display: grid;
  grid-template-columns: minmax(160px, 2fr) minmax(90px, 1fr) minmax(110px, 1fr) minmax(120px, 1fr);
  gap: 12px;
  align-items: center;
  padding: 11px 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: 14px;
}

.update-row:last-child {
  border-bottom: 0;
}

.row-name,
.update-name {
  font-weight: 600;
  color: var(--ink);
}

.row-genre,
.update-genre {
  color: var(--steel);
}

.row-progress,
.update-progress {
  color: var(--text);
}

.row-time,
.update-time {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--muted);
}

/* ==================== index: ranking + fields ==================== */

.ranking-fields {
  margin-bottom: 64px;
}

.ranking-fields-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.column-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  padding-bottom: 12px;
  border-bottom: 2px solid var(--ink);
  margin-bottom: 16px;
}

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

.ranking-column .ranking-item {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr) auto;
  gap: 12px;
  align-items: baseline;
  padding: 9px 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: 15px;
}

.rank-no {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
}

.rank-name {
  font-weight: 600;
  color: var(--ink);
}

.rank-genre {
  font-size: 13px;
  color: var(--steel);
}

.field-brief {
  display: grid;
  grid-template-columns: minmax(120px, auto) minmax(0, 1fr);
  gap: 0 16px;
  font-size: 14px;
}

.field-term {
  font-weight: 600;
  color: var(--ink);
  padding: 9px 0;
  border-bottom: 1px solid var(--line-soft);
}

.field-desc {
  color: var(--text);
  padding: 9px 0;
  border-bottom: 1px solid var(--line-soft);
}

.column-foot {
  margin-top: 16px;
  font-size: 14px;
}

/* ==================== index: guide + column index ==================== */

.guide-index {
  margin-bottom: 24px;
}

.path-steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--gap);
  margin-bottom: 40px;
}

.path-step {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
}

.step-no {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 8px;
}

.step-name {
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 8px;
}

.step-desc {
  font-size: 14px;
  color: var(--text);
}

.column-index {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
}

.column-index-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-soft);
  margin-bottom: 16px;
}

.column-index-list {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 12px;
}

.column-index-list a {
  display: block;
  padding: 10px 12px;
  min-height: 44px;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  text-align: center;
}

.column-index-list a:hover,
.column-index-list a:focus-visible {
  color: var(--accent);
  border-color: var(--accent);
}

/* ==================== genre page ==================== */

.genre-rows {
  margin-bottom: 64px;
}

.genre-row-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 24px;
}

.genre-row {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr);
  gap: 24px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 24px;
}

.genre-row-index {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  padding-top: 4px;
}

.genre-row-name {
  font-size: 20px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 10px;
}

.genre-row-scope,
.genre-row-org {
  font-size: 15px;
  color: var(--text);
  margin-bottom: 8px;
}

.genre-row-org {
  color: var(--muted);
  margin-bottom: 0;
}

.field-label {
  display: inline-block;
  min-width: 84px;
  font-size: 13px;
  font-weight: 600;
  color: var(--steel);
}

.direction-covers {
  margin-bottom: 64px;
}

.direction-block {
  margin-bottom: 40px;
}

.direction-block:last-child {
  margin-bottom: 0;
}

.direction-name {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  padding-left: 12px;
  border-left: 3px solid var(--accent);
  margin-bottom: 16px;
}

.direction-covers .cover-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.difference-note {
  margin-bottom: 8px;
}

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

.difference-item {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
}

.difference-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 8px;
}

.difference-text {
  font-size: 14px;
  color: var(--text);
}

.difference-foot {
  margin-top: 20px;
  font-size: 14px;
}

/* ==================== updates page ==================== */

.batch-note {
  margin-bottom: 56px;
}

.note-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--gap);
  margin-top: 24px;
}

.note-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-left: 3px solid var(--steel);
  border-radius: var(--radius);
  padding: 20px;
}

.note-card-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 8px;
}

.note-card-text {
  font-size: 14px;
  color: var(--text);
}

.update-list {
  margin-bottom: 56px;
}

.batch-group {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 24px;
  margin-top: 24px;
}

.batch-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 16px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line-soft);
}

.batch-code {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
}

.batch-head .batch-title {
  flex: 1 1 240px;
  border: 0;
  padding: 0;
  margin: 0;
  font-size: 17px;
}

.batch-time {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--muted);
}

.batch-media {
  display: grid;
  grid-template-columns: 132px minmax(0, 1fr);
  gap: 18px;
  align-items: center;
  margin: 18px 0 6px;
}

.batch-media img {
  width: 132px;
  height: 176px;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

.batch-media-caption {
  font-size: 14px;
  color: var(--text);
}

.field-table {
  margin-bottom: 8px;
}

.table-scroll {
  overflow-x: auto;
  margin-top: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--card);
}

.data-table,
.field-table table {
  min-width: 640px;
}

.table-caption {
  caption-side: top;
  text-align: left;
  padding: 14px 16px;
  font-size: 14px;
  color: var(--muted);
  border-bottom: 1px solid var(--line-soft);
}

.data-table th,
.data-table td,
.field-table th,
.field-table td {
  padding: 12px 16px;
  font-size: 14px;
  text-align: left;
  border-bottom: 1px solid var(--line-soft);
  vertical-align: top;
}

.data-table thead th,
.field-table thead th {
  background: var(--bg);
  font-weight: 600;
  color: var(--ink);
  white-space: nowrap;
}

.data-table tbody th,
.field-table tbody th {
  font-weight: 600;
  color: var(--ink);
  white-space: nowrap;
}

.data-table tbody tr:last-child th,
.data-table tbody tr:last-child td,
.field-table tbody tr:last-child th,
.field-table tbody tr:last-child td {
  border-bottom: 0;
}

.update-list .section-foot a {
  margin-right: 18px;
  font-weight: 600;
  color: var(--steel);
  border-bottom: 1px solid currentColor;
}

.update-list .section-foot a:hover,
.update-list .section-foot a:focus-visible {
  color: var(--accent);
}

/* ==================== ranking page ==================== */

.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
  gap: 40px;
  align-items: start;
  margin-bottom: 64px;
}

.ranking-section .section-head,
.change-section .section-head,
.related-section .section-head {
  display: block;
  border-bottom: 2px solid var(--ink);
  padding-bottom: 12px;
  margin-bottom: 24px;
}

.ranking-section .section-title,
.change-section .section-title,
.related-section .section-title {
  font-size: 22px;
  margin: 6px 0;
}

.ranking-section .section-desc,
.change-section .section-desc,
.related-section .section-desc {
  font-size: 14px;
  color: var(--muted);
}

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

.ranking-section .ranking-item {
  display: grid;
  grid-template-columns: 44px 72px minmax(0, 1fr);
  gap: 16px;
  align-items: center;
  padding: 12px 4px;
  border-bottom: 1px solid var(--line-soft);
  transition: background 0.18s ease;
}

.ranking-section .ranking-item:hover {
  background: var(--card);
}

.ranking-section .rank-no {
  font-size: 15px;
}

.rank-cover {
  margin: 0;
  width: 72px;
}

.rank-cover img {
  width: 72px;
  height: 96px;
  object-fit: cover;
  border-radius: 4px;
  border: 1px solid var(--line);
}

.rank-body .rank-name {
  font-size: 16px;
  margin-bottom: 4px;
}

.rank-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.ranking-aside {
  background: var(--card);
  border: 1px solid var(--line);
  border-top: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 22px;
}

.aside-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-soft);
  margin-bottom: 14px;
}

.aside-intro {
  font-size: 14px;
  color: var(--text);
  margin-bottom: 18px;
}

.ranking-aside .note-list {
  font-size: 14px;
}

.ranking-aside .note-term {
  font-weight: 600;
  color: var(--ink);
  padding-top: 10px;
}

.ranking-aside .note-desc {
  color: var(--text);
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-soft);
}

.ranking-aside .note-desc:last-of-type {
  border-bottom: 0;
}

.aside-foot {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
  font-size: 14px;
}

.change-section {
  margin-bottom: 64px;
}

.change-log {
  display: flex;
  flex-direction: column;
}

.change-item {
  display: grid;
  grid-template-columns: 160px minmax(0, 1fr);
  gap: 20px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line-soft);
}

.change-batch {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
}

.change-text {
  font-size: 15px;
  color: var(--text);
}

.related-section {
  margin-bottom: 8px;
}

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

.related-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
}

.related-card-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 8px;
}

.related-card-text {
  font-size: 14px;
  color: var(--text);
  margin-bottom: 14px;
}

.related-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--steel);
  border-bottom: 1px solid currentColor;
}

.related-link:hover,
.related-link:focus-visible {
  color: var(--accent);
}

/* ==================== fields page ==================== */

.field-table-section,
.missing-note-section,
.field-example-section {
  margin-bottom: 64px;
}

.field-table-section .section-title,
.missing-note-section .section-title,
.field-example-section .section-title {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.note-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--gap);
  margin-top: 24px;
}

.note-column {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
}

.note-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-soft);
  margin-bottom: 14px;
}

.note-column .note-list li {
  position: relative;
  padding-left: 18px;
  margin-bottom: 10px;
  font-size: 14px;
  color: var(--text);
}

.note-column .note-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
}

.field-example {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 32px;
  align-items: start;
  margin-top: 24px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
}

.example-cover {
  margin: 0;
}

.example-cover img {
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

.example-cover-caption {
  margin-top: 10px;
  font-size: 13px;
  color: var(--muted);
}

.example-name {
  font-size: 20px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 14px;
}

.example-fields {
  display: grid;
  grid-template-columns: minmax(110px, auto) minmax(0, 1fr);
  gap: 0 16px;
  font-size: 14px;
}

.example-fields dt {
  font-weight: 600;
  color: var(--steel);
  padding: 8px 0;
  border-bottom: 1px solid var(--line-soft);
}

.example-fields dd {
  color: var(--text);
  padding: 8px 0;
  border-bottom: 1px solid var(--line-soft);
}

.example-note {
  margin-top: 16px;
  font-size: 14px;
  color: var(--muted);
}

.example-links {
  margin-top: 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  font-size: 14px;
}

.example-links a {
  font-weight: 600;
  color: var(--steel);
  border-bottom: 1px solid currentColor;
}

.example-links a:hover,
.example-links a:focus-visible {
  color: var(--accent);
}

/* ==================== guide page ==================== */

.path-steps,
.boundary-note,
.feedback-note,
.guide-faq {
  margin-bottom: 64px;
}

.path-steps .section-head,
.boundary-note .section-head,
.feedback-note .section-head,
.guide-faq .section-head {
  display: block;
  border-bottom: 2px solid var(--ink);
  padding-bottom: 12px;
  margin-bottom: 24px;
}

.path-steps .section-title,
.boundary-note .section-title,
.feedback-note .section-title,
.guide-faq .section-title {
  font-size: 22px;
  margin: 6px 0;
}

.step-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--gap);
  margin-bottom: 32px;
}

.step-item {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
}

.step-index {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 8px;
}

.step-item .step-name {
  font-size: 17px;
  margin-bottom: 8px;
}

.step-text {
  font-size: 14px;
  color: var(--text);
}

.path-figure {
  margin: 0;
}

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

.figure-caption {
  margin-top: 10px;
  font-size: 13px;
  color: var(--muted);
}

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

.boundary-column {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
}

.boundary-covered {
  border-top: 3px solid var(--steel);
}

.boundary-excluded {
  border-top: 3px solid var(--accent);
}

.boundary-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-soft);
  margin-bottom: 14px;
}

.boundary-list li {
  position: relative;
  padding-left: 18px;
  margin-bottom: 10px;
  font-size: 14px;
  color: var(--text);
}

.boundary-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  background: var(--steel);
  border-radius: 50%;
}

.boundary-excluded .boundary-list li::before {
  background: var(--accent);
}

.boundary-tail {
  margin-top: 20px;
  font-size: 14px;
}

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

.feedback-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
}

.feedback-index {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 8px;
}

.feedback-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 8px;
}

.feedback-text {
  font-size: 14px;
  color: var(--text);
}

.feedback-entry {
  margin-top: 32px;
  background: var(--card);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 22px;
}

.feedback-entry-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 8px;
}

.feedback-entry-text {
  font-size: 15px;
  color: var(--text);
}

.feedback-entry-links {
  margin-top: 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  font-size: 14px;
}

.feedback-entry-links a {
  font-weight: 600;
  color: var(--steel);
  border-bottom: 1px solid currentColor;
}

.feedback-entry-links a:hover,
.feedback-entry-links a:focus-visible {
  color: var(--accent);
}

.guide-faq {
  margin-bottom: 8px;
}

.faq-item {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  margin-bottom: 12px;
}

.faq-question {
  padding: 16px 20px;
  min-height: 44px;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
}

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

.faq-question::after {
  content: "＋";
  float: right;
  font-weight: 600;
  color: var(--accent);
}

.faq-item[open] .faq-question::after {
  content: "－";
}

.faq-answer {
  padding: 0 20px 18px;
  font-size: 15px;
  color: var(--text);
  border-top: 1px solid var(--line-soft);
  padding-top: 14px;
}

/* ==================== 404 page ==================== */

.error-main {
  max-width: var(--container);
  margin: 0 auto;
  padding: 64px 24px 80px;
}

.error-panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-top: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 40px;
  margin-bottom: 40px;
}

.error-code {
  font-family: var(--font-mono);
  font-size: 44px;
  font-weight: 600;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 16px;
}

.error-title {
  font-size: 32px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 12px;
}

.error-desc {
  font-size: 16px;
  color: var(--text);
  margin-bottom: 24px;
  max-width: 640px;
}

.error-action {
  display: inline-block;
  padding: 12px 22px;
  min-height: 44px;
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  background: var(--accent);
  border-radius: var(--radius);
}

.error-action:hover,
.error-action:focus-visible {
  color: #fff;
  background: var(--ink);
}

.error-routes-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  padding-bottom: 12px;
  border-bottom: 2px solid var(--ink);
  margin-bottom: 18px;
}

.error-route-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.error-route-list a {
  display: block;
  padding: 14px 16px;
  min-height: 44px;
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.error-route-list a:hover,
.error-route-list a:focus-visible {
  color: var(--accent);
  border-color: var(--accent);
}

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

@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .hero-title {
    font-size: 34px;
  }

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

  .page-layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .ranking-fields-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .difference-grid,
  .related-grid,
  .feedback-grid,
  .path-steps,
  .step-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .column-index-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

@media (max-width: 768px) {
  .header-inner {
    flex-wrap: nowrap;
    gap: 12px;
  }

  .nav-toggle {
    display: flex;
    margin-left: auto;
  }

  .site-nav {
    flex: 1 1 100%;
    order: 3;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    gap: 2px;
    padding: 8px 0 16px;
  }

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

  .nav-link {
    display: block;
    padding: 12px 10px;
    min-height: 44px;
    border-radius: 4px;
  }

  .nav-link.is-current {
    box-shadow: inset 3px 0 0 var(--accent);
  }

  .page-title {
    font-size: 28px;
  }

  .hero-title {
    font-size: 28px;
  }

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

  .inner-main,
  .home-main {
    padding: 20px 18px 56px;
  }

  .genre-grid,
  .cover-grid,
  .direction-covers .cover-grid,
  .difference-grid,
  .related-grid,
  .feedback-grid,
  .path-steps,
  .step-list,
  .note-grid,
  .note-columns,
  .boundary-columns {
    grid-template-columns: 1fr;
  }

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

  .genre-row {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .genre-row-index {
    padding-top: 0;
  }

  .update-row {
    grid-template-columns: 1fr;
    gap: 4px;
    padding: 14px 0;
  }

  .update-row span {
    display: block;
  }

  .row-genre::before,
  .update-genre::before {
    content: "题材：";
    color: var(--muted);
  }

  .row-progress::before,
  .update-progress::before {
    content: "进度：";
    color: var(--muted);
  }

  .row-time::before,
  .update-time::before {
    content: "记录：";
    color: var(--muted);
  }

  .ranking-section .ranking-item {
    grid-template-columns: 40px 64px minmax(0, 1fr);
    gap: 12px;
  }

  .rank-cover,
  .rank-cover img {
    width: 64px;
  }

  .rank-cover img {
    height: 86px;
  }

  .change-item {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .batch-media {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .field-example {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .example-cover img {
    max-width: 240px;
  }

  .error-panel {
    padding: 28px 22px;
  }

  .error-code {
    font-size: 36px;
  }

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

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 40px 18px 24px;
  }

  .footer-copy {
    padding: 14px 18px;
  }
}

@media (max-width: 480px) {
  .column-index-list {
    grid-template-columns: 1fr;
  }

  .error-route-list {
    grid-template-columns: 1fr;
  }

  .field-brief,
  .example-fields {
    grid-template-columns: 1fr;
  }

  .field-term,
  .example-fields dt {
    padding-bottom: 2px;
    border-bottom: 0;
  }

  .field-desc,
  .example-fields dd {
    padding-top: 0;
  }

  .rank-cover,
  .rank-cover img {
    width: 56px;
  }

  .rank-cover img {
    height: 74px;
  }
}

/* ==================== motion ==================== */

@media (prefers-reduced-motion: no-preference) {
  .reveal {
    opacity: 1;
    transform: none;
  }

  .reveal.is-visible {
    animation: fade-rise 0.42s ease-out both;
  }
}

@keyframes fade-rise {
  from {
    opacity: 0.001;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}