:root {
  --paper: #F7F4EE;
  --ink: #1E2A38;
  --ink-soft: #46586A;
  --red: #C0392B;
  --steel: #5B7C8D;
  --line: #E4DED2;
  --card: #FFFDF9;
  --radius: 6px;
  --maxw: 1120px;
  --mono: ui-monospace, "SFMono-Regular", "Menlo", "Consolas", monospace;
}

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

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.8;
}

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

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

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

h1, h2, h3, h4 {
  margin: 0;
  font-weight: 700;
  line-height: 1.35;
}

p {
  margin: 0 0 12px;
}

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

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

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

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

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

.site-main {
  flex: 1 1 auto;
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px 56px;
}

.inner-main {
  padding-top: 20px;
}

.top-notice {
  background: var(--ink);
  color: #F2EDE4;
  font-size: 13px;
  line-height: 1.6;
}

.top-notice p {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 8px 24px;
}

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

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

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 14px 24px;
}

.brand {
  display: flex;
  flex-direction: column;
  line-height: 1.3;
}

.brand-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--ink);
}

.brand-slogan {
  font-size: 12px;
  color: var(--steel);
}

.site-nav {
  position: relative;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--card);
  position: relative;
}

.nav-toggle::before {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  top: 15px;
  height: 2px;
  background: var(--ink);
  box-shadow: 0 6px 0 var(--ink), 0 12px 0 var(--ink);
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-list a {
  display: block;
  padding: 8px 12px;
  font-size: 15px;
  border-radius: var(--radius);
  border: 1px solid transparent;
}

.nav-list a:hover {
  border-color: var(--line);
  background: var(--card);
}

.nav-list a.is-current {
  color: var(--red);
  border-color: var(--line);
  background: var(--card);
  font-weight: 700;
}

/* ============ breadcrumb & page header ============ */

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: var(--steel);
  padding: 6px 0 14px;
}

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

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

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

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

.page-header {
  padding: 4px 0 26px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 32px;
}

.page-title {
  font-size: 34px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 10px;
}

.page-description,
.page-lead,
.page-intro {
  max-width: 720px;
  font-size: 15px;
  color: var(--ink-soft);
  margin-bottom: 8px;
}

/* ============ common section head ============ */

.section-head {
  margin-bottom: 20px;
}

.chapter-no,
.section-index {
  display: inline-block;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--red);
  margin-bottom: 6px;
}

.section-title {
  font-size: 22px;
  color: var(--ink);
  margin-bottom: 8px;
}

.section-lead,
.section-intro {
  max-width: 720px;
  font-size: 14px;
  color: var(--ink-soft);
  margin-bottom: 0;
}

.subsection-title {
  font-size: 16px;
  color: var(--ink);
  margin-bottom: 10px;
}

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

.section-foot a {
  color: var(--steel);
  border-bottom: 1px solid var(--line);
}

.section-foot a:hover {
  color: var(--red);
  border-color: var(--red);
}

.block-title {
  font-size: 16px;
  color: var(--ink);
  margin-bottom: 12px;
}

.block-link {
  display: inline-block;
  margin-top: 12px;
  font-size: 14px;
  color: var(--steel);
  border-bottom: 1px solid var(--line);
}

.block-link:hover {
  color: var(--red);
  border-color: var(--red);
}

/* ============ home: hero ============ */

.section-hero {
  padding: 32px 0 44px;
  border-bottom: 1px solid var(--line);
}

.hero-layout {
  display: grid;
  grid-template-columns: minmax(320px, 1fr) minmax(320px, 1.05fr);
  gap: 36px;
  align-items: start;
}

.hero-title {
  font-size: 34px;
  margin-bottom: 12px;
}

.hero-lead {
  font-size: 15px;
  color: var(--ink-soft);
  max-width: 560px;
  margin-bottom: 24px;
}

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

.task-item {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 16px;
}

.task-title {
  font-size: 15px;
  margin-bottom: 6px;
}

.task-desc {
  font-size: 13px;
  color: var(--ink-soft);
  margin-bottom: 8px;
}

.task-link {
  font-size: 13px;
  color: var(--red);
}

.hero-figure {
  margin: 0;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.hero-figure img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.hero-figure figcaption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--steel);
  border-top: 1px solid var(--line);
}

/* ============ home: subject index ============ */

.section-subject-index {
  padding: 44px 0;
  border-bottom: 1px solid var(--line);
}

.subject-table {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--card);
}

.subject-row {
  display: grid;
  grid-template-columns: 1.1fr 1.6fr 1.4fr 1.4fr 0.9fr;
  gap: 12px;
  padding: 12px 16px;
  border-top: 1px solid var(--line);
  font-size: 14px;
  align-items: center;
}

.subject-row-head {
  border-top: 0;
  background: #EFEAE0;
  font-size: 13px;
  color: var(--steel);
  font-weight: 700;
}

.subject-row:not(.subject-row-head):hover {
  background: #FBF8F2;
}

.cell-name {
  font-weight: 700;
}

.cell-trait,
.cell-organize,
.cell-rep {
  color: var(--ink-soft);
  font-size: 13px;
}

.cell-link a {
  font-size: 13px;
  color: var(--red);
}

/* ============ home: picks & cover wall ============ */

.section-picks {
  padding: 44px 0;
  border-bottom: 1px solid var(--line);
}

.picks-layout {
  display: grid;
  grid-template-columns: minmax(240px, 0.85fr) minmax(420px, 1.9fr);
  gap: 32px;
  align-items: start;
}

.editor-pick {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
}

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

.pick-figure {
  margin: 0 0 12px;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
}

.pick-figure img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
}

.pick-desc {
  font-size: 13px;
  color: var(--ink-soft);
}

.pick-meta {
  display: grid;
  gap: 6px;
  margin: 12px 0;
  font-size: 13px;
  color: var(--steel);
}

.pick-meta li {
  padding-left: 12px;
  position: relative;
}

.pick-meta li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 5px;
  height: 5px;
  background: var(--red);
  border-radius: 50%;
}

.pick-link {
  font-size: 14px;
  color: var(--red);
}

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

.wall-title {
  font-size: 16px;
  margin-bottom: 14px;
}

.cover-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

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

.cover-card:hover {
  transform: translateY(-3px);
  border-color: var(--steel);
}

.cover-card img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
}

.cover-name {
  display: block;
  padding: 8px 10px 2px;
  font-size: 14px;
  font-weight: 700;
}

.cover-tag {
  display: block;
  padding: 0 10px 10px;
  font-size: 12px;
  color: var(--steel);
}

/* ============ home: updates & rank ============ */

.section-updates-rank {
  padding: 44px 0;
  border-bottom: 1px solid var(--line);
}

.updates-rank-layout {
  display: grid;
  grid-template-columns: minmax(300px, 1fr) minmax(420px, 1.5fr);
  gap: 32px;
  align-items: start;
}

.month-group {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 16px;
  margin-bottom: 14px;
}

.month-title {
  font-size: 15px;
  margin-bottom: 10px;
  color: var(--ink);
}

.update-list {
  display: grid;
  gap: 8px;
}

.update-item {
  display: grid;
  grid-template-columns: 56px 1fr auto;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--line);
}

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

.update-date {
  font-family: var(--mono);
  color: var(--steel);
}

.update-name {
  color: var(--ink);
}

.update-tag,
.update-status {
  font-size: 12px;
  color: var(--red);
  white-space: nowrap;
}

.rank-list-group {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.rank-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px;
}

.rank-name {
  font-size: 15px;
  margin-bottom: 6px;
}

.rank-basis {
  font-size: 12px;
  color: var(--steel);
  margin-bottom: 10px;
}

.rank-items {
  display: grid;
  gap: 6px;
  font-size: 13px;
  color: var(--ink-soft);
  counter-reset: rank;
}

.rank-items li {
  padding-left: 22px;
  position: relative;
}

.rank-items li::before {
  counter-increment: rank;
  content: counter(rank);
  position: absolute;
  left: 0;
  top: 2px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--red);
}

/* ============ home: guide & boundary ============ */

.section-guide {
  padding: 44px 0;
  border-bottom: 1px solid var(--line);
}

.guide-layout {
  display: grid;
  grid-template-columns: minmax(300px, 1fr) minmax(320px, 1fr);
  gap: 32px;
  align-items: start;
}

.field-list {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 6px 16px;
}

.field-term {
  font-size: 14px;
  font-weight: 700;
  padding-top: 12px;
}

.field-desc {
  font-size: 13px;
  color: var(--ink-soft);
  margin: 0;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--line);
}

.field-list dd:last-of-type {
  border-bottom: 0;
}

.boundary-block {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
}

.boundary-desc {
  font-size: 14px;
  color: var(--ink-soft);
}

.boundary-list {
  display: grid;
  gap: 8px;
  font-size: 13px;
  color: var(--ink-soft);
}

.boundary-list li {
  padding-left: 16px;
  position: relative;
}

.boundary-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 1px;
  background: var(--red);
}

/* ============ home: page index ============ */

.section-page-index {
  padding: 44px 0 0;
}

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

.index-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
}

.index-title {
  font-size: 16px;
  margin-bottom: 8px;
}

.index-desc {
  font-size: 13px;
  color: var(--ink-soft);
  margin-bottom: 10px;
}

.index-link {
  font-size: 13px;
  color: var(--red);
}

/* ============ inner: subject ============ */

.subject-sections {
  margin-bottom: 44px;
}

.subject-block {
  display: grid;
  grid-template-columns: minmax(320px, 1.1fr) minmax(240px, 0.9fr);
  gap: 28px;
  align-items: start;
  padding: 24px 0;
  border-top: 1px solid var(--line);
}

.subject-info {
  min-width: 0;
}

.subject-name {
  font-size: 20px;
  margin-bottom: 12px;
}

.subject-info p {
  font-size: 14px;
  color: var(--ink-soft);
  margin-bottom: 10px;
}

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

.subject-status a {
  color: var(--red);
  font-size: 13px;
}

.subject-cover {
  margin: 0;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.subject-cover img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.subject-cover figcaption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--steel);
  border-top: 1px solid var(--line);
}

.subject-compare {
  margin-bottom: 44px;
}

.compare-table {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  font-size: 14px;
}

.compare-table caption {
  padding: 12px 16px;
  text-align: left;
  font-size: 13px;
  color: var(--steel);
  background: #EFEAE0;
  border-bottom: 1px solid var(--line);
}

.compare-table th,
.compare-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.compare-table thead th {
  font-size: 13px;
  color: var(--steel);
  background: #FBF8F2;
}

.compare-table tbody th {
  font-weight: 700;
}

.compare-table tbody td {
  color: var(--ink-soft);
  font-size: 13px;
}

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

/* ============ inner: updates ============ */

.update-months {
  margin-bottom: 44px;
}

.month-block {
  display: grid;
  grid-template-columns: minmax(200px, 0.7fr) minmax(420px, 2fr);
  gap: 28px;
  align-items: start;
  padding: 24px 0;
  border-top: 1px solid var(--line);
}

.month-side {
  min-width: 0;
}

.month-no {
  font-family: var(--mono);
  font-size: 26px;
  color: var(--red);
  margin-bottom: 2px;
}

.month-count {
  font-size: 13px;
  color: var(--steel);
  margin-bottom: 12px;
}

.month-cover {
  margin: 0;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.month-cover img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
}

.month-cover figcaption {
  padding: 8px 12px;
  font-size: 12px;
  color: var(--steel);
  border-top: 1px solid var(--line);
}

.month-records {
  min-width: 0;
}

.record-list {
  display: grid;
  gap: 0;
}

.record-item {
  display: grid;
  grid-template-columns: 88px minmax(140px, 1.4fr) minmax(90px, 1fr) 84px;
  gap: 12px;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px dashed var(--line);
  font-size: 14px;
}

.record-item:last-child {
  border-bottom: 0;
}

.record-date {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--steel);
}

.record-name {
  color: var(--ink);
}

.record-subject {
  font-size: 13px;
  color: var(--ink-soft);
}

.record-status {
  font-size: 12px;
  color: var(--red);
  text-align: right;
}

.rhythm-notes {
  margin-bottom: 44px;
}

.rhythm-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.rhythm-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
}

.rhythm-heading {
  font-size: 15px;
  margin-bottom: 8px;
}

.rhythm-card p {
  font-size: 13px;
  color: var(--ink-soft);
  margin: 0;
}

.subject-focus {
  margin-bottom: 44px;
}

.focus-layout {
  display: grid;
  grid-template-columns: minmax(420px, 2fr) minmax(220px, 1fr);
  gap: 28px;
  align-items: start;
}

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

.focus-table {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  font-size: 14px;
}

.focus-caption {
  padding: 12px 16px;
  text-align: left;
  font-size: 13px;
  color: var(--steel);
  background: #EFEAE0;
  border-bottom: 1px solid var(--line);
}

.focus-table th,
.focus-table td {
  padding: 10px 16px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
  font-size: 13px;
}

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

.focus-aside {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  min-width: 0;
}

.focus-aside p {
  font-size: 13px;
  color: var(--ink-soft);
}

.aside-title {
  font-size: 16px;
  margin-bottom: 10px;
}

.aside-text {
  font-size: 13px;
  color: var(--ink-soft);
}

.aside-list {
  display: grid;
  gap: 8px;
  font-size: 13px;
}

.aside-list li {
  padding-left: 14px;
  position: relative;
  color: var(--ink-soft);
}

.aside-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 1px;
  background: var(--red);
}

.aside-links {
  margin-top: 12px;
  font-size: 13px;
}

.aside-links a {
  color: var(--red);
}

.related-entries {
  margin-bottom: 44px;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.related-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
}

.related-heading {
  font-size: 15px;
  margin-bottom: 8px;
}

.related-card p {
  font-size: 13px;
  color: var(--ink-soft);
  margin-bottom: 8px;
}

.related-link {
  font-size: 13px;
  color: var(--red);
}

/* ============ inner: topics ============ */

.topics-layout {
  display: grid;
  grid-template-columns: minmax(520px, 2.2fr) minmax(240px, 1fr);
  gap: 32px;
  align-items: start;
}

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

.topic-block {
  display: grid;
  grid-template-columns: minmax(280px, 1fr) minmax(240px, 1fr);
  gap: 24px;
  align-items: start;
  padding: 24px 0;
  border-top: 1px solid var(--line);
}

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

.topic-info .chapter-no {
  margin-bottom: 4px;
}

.topic-info .section-title {
  font-size: 19px;
  margin-bottom: 12px;
}

.topic-info p {
  font-size: 14px;
  color: var(--ink-soft);
  margin-bottom: 10px;
}

.label {
  display: inline-block;
  min-width: 76px;
  font-size: 13px;
  color: var(--steel);
}

.topic-covers {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.topic-covers .cover-card {
  position: relative;
}

.topic-covers .cover-card img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
}

.topic-covers .cover-card figcaption {
  padding: 8px 10px 2px;
  font-size: 13px;
  font-weight: 700;
}

.topic-covers .cover-tag {
  display: block;
  padding: 0 10px 10px;
  font-size: 12px;
  color: var(--steel);
}

.topic-mapping {
  margin: 32px 0 44px;
}

.table-wrap {
  overflow-x: auto;
}

.mapping-table {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  font-size: 14px;
  min-width: 520px;
}

.mapping-table caption {
  padding: 12px 16px;
  text-align: left;
  font-size: 13px;
  color: var(--steel);
  background: #EFEAE0;
  border-bottom: 1px solid var(--line);
}

.mapping-table th,
.mapping-table td {
  padding: 10px 16px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  font-size: 13px;
}

.mapping-table thead th {
  color: var(--steel);
  background: #FBF8F2;
}

.mapping-table tbody td {
  color: var(--ink-soft);
}

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

.topics-aside {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  min-width: 0;
}

.topics-aside .aside-title {
  font-size: 16px;
  margin-bottom: 10px;
}

/* ============ inner: guide ============ */

.layout-shell {
  display: grid;
  grid-template-columns: minmax(520px, 1.9fr) minmax(280px, 1fr);
  gap: 32px;
  align-items: start;
  margin-bottom: 44px;
}

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

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

.field-figure {
  margin: 0 0 20px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.field-figure img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.field-figure figcaption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--steel);
  border-top: 1px solid var(--line);
}

.field-table-wrap {
  overflow-x: auto;
  margin-bottom: 24px;
}

.field-table {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  font-size: 14px;
  min-width: 480px;
}

.field-table caption {
  padding: 12px 16px;
  text-align: left;
  font-size: 13px;
  color: var(--steel);
  background: #EFEAE0;
  border-bottom: 1px solid var(--line);
}

.field-table th,
.field-table td {
  padding: 10px 16px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  font-size: 13px;
}

.field-table thead th {
  color: var(--steel);
  background: #FBF8F2;
}

.field-table tbody th {
  font-weight: 700;
}

.field-table tbody td {
  color: var(--ink-soft);
}

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

.rule-block {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
}

.rule-list {
  display: grid;
  gap: 14px;
}

.rule-item h4 {
  font-size: 14px;
  margin-bottom: 4px;
}

.rule-item p {
  font-size: 13px;
  color: var(--ink-soft);
  margin: 0;
}

.section-more {
  margin-top: 16px;
  font-size: 14px;
}

.section-more a {
  color: var(--red);
}

.faq-list {
  display: grid;
  gap: 10px;
}

.faq-item {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0 16px;
}

.faq-question {
  cursor: pointer;
  padding: 14px 0;
  font-size: 15px;
  font-weight: 700;
  list-style: none;
  position: relative;
  padding-right: 24px;
}

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

.faq-question::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 12px;
  font-family: var(--mono);
  font-size: 18px;
  color: var(--red);
}

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

.faq-answer {
  padding: 0 0 14px;
  border-top: 1px solid var(--line);
}

.faq-answer p {
  font-size: 14px;
  color: var(--ink-soft);
  margin: 12px 0 0;
}

.guide-bounds {
  margin-bottom: 44px;
}

.bounds-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 16px;
}

.bounds-col {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  min-width: 0;
}

.bounds-list {
  display: grid;
  gap: 8px;
  font-size: 13px;
  color: var(--ink-soft);
}

.bounds-list li {
  padding-left: 16px;
  position: relative;
}

.bounds-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 1px;
  background: var(--red);
}

.bounds-note {
  background: var(--card);
  border: 1px solid var(--line);
  border-left: 3px solid var(--red);
  border-radius: var(--radius);
  padding: 16px;
}

.bounds-note p {
  font-size: 14px;
  color: var(--ink-soft);
  margin: 0;
}

.guide-related {
  margin-bottom: 44px;
}

.related-columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

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

.related-column {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  min-width: 0;
}

.related-title,
.related-name {
  font-size: 15px;
  margin-bottom: 8px;
}

.related-name a {
  color: var(--ink);
}

.related-name a:hover {
  color: var(--red);
}

.related-desc,
.related-column p {
  font-size: 13px;
  color: var(--ink-soft);
  margin-bottom: 8px;
}

.related-entry {
  margin-bottom: 44px;
}

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

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

.error-main {
  padding-top: 32px;
}

.error-panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px 24px;
  margin-bottom: 32px;
}

.error-code {
  font-family: var(--mono);
  font-size: 46px;
  color: var(--red);
  margin-bottom: 6px;
}

.error-panel h1 {
  font-size: 28px;
  margin-bottom: 12px;
}

.error-lead {
  font-size: 15px;
  color: var(--ink-soft);
  max-width: 640px;
}

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

.button-primary,
.button-plain {
  display: inline-block;
  padding: 11px 20px;
  border-radius: var(--radius);
  font-size: 14px;
  min-height: 44px;
  line-height: 22px;
}

.button-primary {
  background: var(--ink);
  color: #F7F4EE;
}

.button-primary:hover {
  background: var(--red);
  color: #FFF;
}

.button-plain {
  border: 1px solid var(--line);
  background: var(--paper);
}

.error-routes h2 {
  font-size: 20px;
  margin-bottom: 14px;
}

.error-route-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.error-route-list li {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 16px;
}

.error-route-list a {
  display: block;
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 4px;
}

.error-route-list p {
  font-size: 13px;
  color: var(--ink-soft);
  margin: 0;
}

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

.site-footer {
  background: var(--ink);
  color: #D9D2C6;
  margin-top: 24px;
}

.footer-groups {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 36px 24px 24px;
}

.footer-title {
  font-size: 15px;
  color: #F7F4EE;
  margin-bottom: 12px;
}

.footer-list {
  display: grid;
  gap: 8px;
}

.footer-list a {
  color: #C6BFB2;
  font-size: 14px;
}

.footer-list a:hover {
  color: #FFF;
}

.footer-bottom {
  border-top: 1px solid rgba(228, 222, 210, 0.18);
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 16px 24px 28px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 24px;
  font-size: 13px;
}

.footer-bottom p {
  margin: 0;
}

.footer-note {
  color: #A9A296;
}

.footer-return a {
  color: #F7F4EE;
  border-bottom: 1px solid rgba(247, 244, 238, 0.4);
}

.footer-copy {
  color: #A9A296;
  margin-left: auto;
}

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

@media (max-width: 1024px) {
  .hero-layout,
  .picks-layout,
  .updates-rank-layout,
  .guide-layout,
  .topics-layout,
  .layout-shell,
  .focus-layout,
  .subject-block,
  .month-block,
  .topic-block {
    grid-template-columns: minmax(0, 1fr);
  }

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

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

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

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

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

@media (max-width: 768px) {
  .site-header {
    flex-wrap: wrap;
    padding: 12px 16px;
  }

  .site-main {
    padding: 0 16px 40px;
  }

  .nav-toggle {
    display: block;
  }

  .nav-list {
    display: none;
    position: absolute;
    right: 0;
    top: calc(100% + 8px);
    width: 220px;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 6px;
    box-shadow: 0 10px 24px rgba(30, 42, 56, 0.12);
  }

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

  .nav-list a {
    padding: 12px 14px;
    min-height: 44px;
  }

  .page-title {
    font-size: 26px;
  }

  .hero-title {
    font-size: 26px;
  }

  .section-title {
    font-size: 20px;
  }

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

  .rank-list-group,
  .rhythm-grid,
  .index-grid,
  .bounds-columns,
  .related-columns,
  .guide-related .related-columns,
  .related-entry .related-columns,
  .error-route-list {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .subject-row-head {
    display: none;
  }

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

  .record-name {
    grid-column: 1 / 2;
  }

  .record-subject {
    grid-column: 1 / 2;
  }

  .record-status {
    grid-column: 2 / 3;
    grid-row: 1 / 2;
  }

  .update-item {
    grid-template-columns: 52px 1fr auto;
  }

  .footer-groups {
    grid-template-columns: minmax(0, 1fr);
    padding: 28px 16px 18px;
  }

  .footer-bottom {
    padding: 14px 16px 24px;
  }

  .footer-copy {
    margin-left: 0;
  }
}

@media (max-width: 480px) {
  .cover-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .error-code {
    font-size: 38px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .cover-card {
    transition: none;
  }

  .cover-card:hover {
    transform: none;
  }

  html {
    scroll-behavior: auto;
  }
}