:root {
  --paper: #F6F5F1;
  --ink: #1B1E28;
  --indigo: #2F3E8F;
  --indigo-soft: #E7E9F5;
  --orange: #E0823C;
  --green: #3F8F6A;
  --violet: #6A5C9B;
  --zone: #ECEAF2;
  --line: #D8D5CF;
  --deep: #232838;
  --muted: #5A5F6E;
  --radius: 6px;
  --wrap: 1120px;
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

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

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

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

body.site-body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  color: var(--ink);
  font-weight: 600;
  line-height: 1.35;
}

p {
  margin: 0 0 0.9em;
  max-width: 42em;
}

p:last-child {
  margin-bottom: 0;
}

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

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

a:hover,
a:focus-visible {
  text-decoration: underline;
}

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

figure {
  margin: 0;
}

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

button {
  font: inherit;
  color: inherit;
}

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

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

.site-header {
  background: #FFFFFF;
  border-bottom: 1px solid var(--line);
}

.header-inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 20px;
  min-height: 64px;
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex: 0 0 auto;
}

.brand-link {
  font-size: 19px;
  font-weight: 700;
  color: var(--ink);
}

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

.brand-slogan {
  font-size: 13px;
  color: var(--muted);
}

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

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

.nav-item a {
  display: block;
  padding: 8px 12px;
  font-size: 15px;
  color: var(--ink);
  border-bottom: 2px solid transparent;
}

.nav-item a:hover {
  color: var(--indigo);
  text-decoration: none;
}

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

.nav-toggle {
  display: none;
  margin-left: auto;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.nav-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--ink);
}

.site-main {
  display: block;
}

.inner-main {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 20px 56px;
}

.home-main {
  padding-bottom: 0;
}

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 16px 0;
  font-size: 13px;
  color: var(--muted);
}

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

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

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

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

.breadcrumb-list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

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

.page-header {
  padding: 0 0 8px;
}

.page-title {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.3;
}

.page-hero {
  padding: 12px 0 0;
}

.page-lead,
.page-hero-desc {
  font-size: 16px;
  color: var(--muted);
  max-width: 42em;
}

.page-meta,
.meta-row,
.meta-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 10px;
  font-size: 13px;
  color: var(--muted);
}

.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.meta-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 2px 8px;
  background: var(--zone);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--muted);
}

.meta-label {
  color: var(--muted);
}

.meta-value {
  font-family: var(--font-mono);
  color: var(--ink);
}

.meta-divider {
  color: var(--line);
}

/* ============ page toc ============ */

.page-toc,
.toc-bar {
  margin: 20px 0 8px;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #FFFFFF;
}

.toc-label {
  display: inline-block;
  margin-right: 10px;
  font-size: 13px;
  color: var(--muted);
}

.toc-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
}

.toc-item a {
  display: inline-block;
  padding: 4px 0;
  font-size: 14px;
  color: var(--muted);
}

.toc-item a:hover,
.toc-item a.is-active {
  color: var(--indigo);
}

/* ============ sections ============ */

.section {
  padding: 40px 0;
  border-top: 1px solid var(--line);
}

.section:first-of-type {
  border-top: 0;
}

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

.section-title {
  font-size: 22px;
  font-weight: 600;
}

.section-head-simple {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 16px;
}

.section-desc,
.section-intro,
.section-lead {
  margin-top: 8px;
  font-size: 15px;
  color: var(--muted);
  max-width: 42em;
}

.section-body p {
  color: var(--ink);
}

/* ============ buttons ============ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 20px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
}

.btn-primary {
  background: var(--indigo);
  color: #FFFFFF;
  border-color: var(--indigo);
}

.btn-primary:hover {
  background: #26337A;
  text-decoration: none;
}

.btn-ghost {
  background: transparent;
  color: var(--indigo);
  border-color: var(--indigo);
}

.btn-ghost:hover {
  background: var(--indigo-soft);
  text-decoration: none;
}

/* ============ genre markers ============ */

.genre-bar {
  display: inline-block;
  width: 4px;
  min-height: 16px;
  border-radius: 2px;
  background: var(--indigo);
  flex: 0 0 auto;
}

.genre-bar-rexue,
.genre-tag--shaonian,
.genre-chip--shaonian {
  --genre-color: var(--orange);
}

.genre-bar-xuanyi,
.genre-tag--xuanyi,
.genre-chip--xuanyi {
  --genre-color: var(--violet);
}

.genre-bar-richang,
.genre-tag--richang,
.genre-chip--richang {
  --genre-color: var(--green);
}

.genre-bar-kehuan,
.genre-tag--kehuan,
.genre-chip--kehuan {
  --genre-color: var(--indigo);
}

.genre-bar-zhiyu,
.genre-tag--zhiyu,
.genre-chip--zhiyu {
  --genre-color: #4C8FA6;
}

.genre-bar-jingji,
.genre-tag--qihuan,
.genre-chip--qihuan {
  --genre-color: #A2564B;
}

.genre-bar-rexue,
.genre-bar-xuanyi,
.genre-bar-richang,
.genre-bar-kehuan,
.genre-bar-zhiyu,
.genre-bar-jingji {
  background: var(--genre-color, var(--indigo));
}

.genre-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 2px 8px;
  border-radius: var(--radius);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--muted);
  background: var(--zone);
  border: 1px solid var(--line);
  white-space: nowrap;
}

.genre-tag::before,
.genre-chip a::before,
.genre-card .genre-name a::before {
  content: "";
  display: inline-block;
  width: 3px;
  height: 12px;
  border-radius: 2px;
  background: var(--genre-color, var(--indigo));
}

.genre-tag .genre-bar {
  background: var(--genre-color, var(--indigo));
  min-height: 12px;
  width: 3px;
}

/* ============ entry rows ============ */

.entry-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 0;
  border-top: 1px dashed var(--line);
  font-size: 15px;
}

.entry-row:first-child {
  border-top: 0;
}

.entry-name,
.entry-link {
  color: var(--ink);
  flex: 1 1 auto;
  min-width: 0;
}

.entry-name:hover,
.entry-link:hover {
  color: var(--indigo);
}

.entry-state,
.entry-status {
  flex: 0 0 auto;
  font-size: 13px;
  color: var(--muted);
  font-family: var(--font-mono);
}

/* ============ index page ============ */

.hero-intro {
  background: var(--deep);
  color: #FFFFFF;
}

.hero-inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 48px 20px 40px;
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
  gap: 40px;
  align-items: center;
}

.hero-copy h1 {
  font-size: 34px;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 14px;
}

.hero-lead {
  color: #D6D9E6;
  font-size: 16px;
  max-width: 34em;
}

.hero-audience {
  color: #A9AFC4;
  font-size: 14px;
  max-width: 34em;
}

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

.hero-intro .btn-primary {
  background: #FFFFFF;
  color: var(--deep);
  border-color: #FFFFFF;
}

.hero-intro .btn-primary:hover {
  background: #E4E6F0;
}

.hero-intro .btn-ghost {
  color: #FFFFFF;
  border-color: #6D7590;
}

.hero-intro .btn-ghost:hover {
  background: rgba(255, 255, 255, 0.08);
}

.hero-figure {
  border-radius: var(--radius);
  overflow: hidden;
  background: #2C3245;
}

.hero-figure img {
  width: 100%;
  height: 260px;
  object-fit: cover;
}

.hero-figure figcaption {
  padding: 10px 14px;
  font-size: 13px;
  color: #A9AFC4;
  background: #2C3245;
}

.hero-board {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 36px 20px 8px;
}

.hero-board .section-title {
  font-size: 22px;
}

.genre-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 18px 0 26px;
}

.genre-chip a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 40px;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #FFFFFF;
  font-size: 14px;
  color: var(--ink);
}

.genre-chip a:hover {
  border-color: var(--indigo);
  color: var(--indigo);
  text-decoration: none;
}

.batch-board {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.batch-block {
  padding: 18px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.batch-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 6px;
}

.batch-code {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--orange);
}

.batch-name {
  font-size: 15px;
  color: var(--muted);
}

.batch-rows,
.entry-list {
  margin-top: 4px;
}

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

.genre-card {
  position: relative;
  padding: 18px 18px 16px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.genre-card:hover {
  border-color: var(--indigo);
}

.genre-card .genre-bar {
  position: absolute;
  top: 18px;
  left: 0;
  width: 4px;
  height: 22px;
  background: var(--genre-color, var(--indigo));
  border-radius: 0 2px 2px 0;
}

.genre-figure {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--zone);
}

.genre-figure img {
  width: 100%;
  height: 140px;
  object-fit: cover;
}

.genre-name {
  font-size: 17px;
  font-weight: 600;
}

.genre-name a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--ink);
}

.genre-name a:hover {
  color: var(--indigo);
  text-decoration: none;
}

.genre-boundary {
  font-size: 14px;
  color: var(--muted);
  margin: 0;
}

.genre-links {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-top: auto;
  padding-top: 8px;
  border-top: 1px dashed var(--line);
}

.genre-links li a {
  font-size: 14px;
}

.genre-card--shaonian,
.genre-card-rexue {
  --genre-color: var(--orange);
}

.genre-card--xuanyi,
.genre-card-xuanyi {
  --genre-color: var(--violet);
}

.genre-card--richang,
.genre-card-richang {
  --genre-color: var(--green);
}

.genre-card--kehuan,
.genre-card-kehuan {
  --genre-color: var(--indigo);
}

.genre-card--zhiyu,
.genre-card-zhiyu {
  --genre-color: #4C8FA6;
}

.genre-card--qihuan,
.genre-card-jingji {
  --genre-color: #A2564B;
}

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

.flow-step {
  padding: 18px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.flow-index {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--orange);
}

.flow-name {
  font-size: 17px;
  font-weight: 600;
}

.flow-text {
  font-size: 14px;
  color: var(--muted);
  margin: 0;
}

.flow-next {
  font-size: 13px;
  color: var(--indigo);
  margin-top: auto;
}

.update-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.update-group {
  padding: 18px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.update-group-title {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
}

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

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

.rank-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  border-top: 1px dashed var(--line);
  font-size: 15px;
}

.rank-row:first-child {
  border-top: 0;
}

.rank-index,
.rank-no {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--orange);
  flex: 0 0 32px;
}

.rank-name {
  flex: 1 1 auto;
  min-width: 0;
  color: var(--ink);
}

.rank-note {
  flex: 0 1 auto;
  font-size: 13px;
  color: var(--muted);
}

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

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

.check-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 14px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.check-mark {
  flex: 0 0 auto;
  width: 16px;
  height: 16px;
  margin-top: 4px;
  border: 2px solid var(--green);
  border-radius: 3px;
}

.check-name,
.check-label {
  font-weight: 600;
  flex: 0 0 auto;
}

.check-text,
.check-note,
.check-desc {
  font-size: 14px;
  color: var(--muted);
}

.feature-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 28px;
  align-items: center;
  padding: 20px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.feature-figure {
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--zone);
}

.feature-figure img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.feature-body h3 {
  font-size: 20px;
  margin-bottom: 8px;
}

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

.feature-hint {
  display: inline-block;
  margin-top: 6px;
  font-size: 13px;
  color: var(--indigo);
}

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

.faq-item {
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.faq-question {
  padding: 14px 16px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
}

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

.faq-question::before {
  content: "＋";
  font-size: 14px;
  color: var(--indigo);
  flex: 0 0 auto;
}

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

.faq-answer {
  padding: 0 16px 16px 40px;
}

.faq-answer p {
  font-size: 15px;
  color: var(--muted);
}

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

.about-brief-lead {
  font-size: 16px;
}

.about-brief-points {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 10px;
}

.about-brief-points li {
  font-size: 14px;
  color: var(--muted);
  padding-left: 14px;
  position: relative;
}

.about-brief-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--indigo);
}

.about-brief-body {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 28px;
  align-items: start;
  padding: 20px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

/* ============ genres page ============ */

.classify-body p {
  color: var(--ink);
}

.filter-points {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 20px;
}

.filter-point {
  display: flex;
  gap: 12px;
  padding: 16px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.filter-point-text h3 {
  font-size: 17px;
  margin-bottom: 4px;
}

.filter-point-text p {
  font-size: 14px;
  color: var(--muted);
  margin: 0;
}

.compare-table {
  margin-top: 8px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.compare-table th,
.compare-table td {
  padding: 12px 16px;
  text-align: left;
  font-size: 15px;
  border-top: 1px solid var(--line);
  vertical-align: top;
}

.compare-table thead th {
  background: var(--zone);
  font-weight: 600;
  border-top: 0;
}

.compare-table tbody th {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
}

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

.path-item {
  padding: 18px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.path-item h3 {
  font-size: 17px;
  margin-bottom: 6px;
}

.path-item p {
  font-size: 14px;
  color: var(--muted);
}

.path-link {
  font-size: 14px;
}

.next-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.next-links li a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 10px 18px;
  border: 1px solid var(--indigo);
  border-radius: var(--radius);
  font-size: 15px;
  color: var(--indigo);
}

.next-links li a:hover {
  background: var(--indigo-soft);
  text-decoration: none;
}

.related-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  padding: 20px 0 0;
  margin-top: 8px;
  border-top: 1px solid var(--line);
  font-size: 14px;
}

.related-links-label {
  color: var(--muted);
}

.related-links-item {
  color: var(--indigo);
}

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

.page-layout {
  display: grid;
  gap: 32px;
  align-items: start;
}

.layout-shell.sidebar-left {
  grid-template-columns: 240px minmax(0, 1fr);
}

.sidebar {
  padding: 18px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.sidebar-title {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
}

.sidebar-note {
  font-size: 13px;
  color: var(--muted);
}

.tree-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin: 12px 0;
}

.tree-item a {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 40px;
  padding: 6px 10px;
  border-left: 3px solid transparent;
  font-size: 15px;
  color: var(--ink);
}

.tree-item a::before {
  content: "";
  width: 3px;
  height: 12px;
  border-radius: 2px;
  background: var(--line);
  flex: 0 0 auto;
}

.tree-item a:hover {
  background: var(--zone);
  text-decoration: none;
}

.tree-item.is-current a {
  border-left-color: var(--indigo);
  color: var(--indigo);
  font-weight: 600;
  background: var(--indigo-soft);
}

.tree-item.is-current a::before {
  background: var(--indigo);
}

.sidebar-foot {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px dashed var(--line);
  font-size: 14px;
}

.main-column > .section:first-child {
  border-top: 0;
  padding-top: 0;
}

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

.path-node {
  padding: 16px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.path-index {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--orange);
}

.path-name {
  font-size: 16px;
  font-weight: 600;
  margin: 6px 0 4px;
}

.path-text {
  font-size: 14px;
  color: var(--muted);
  margin: 0;
}

.node-detail {
  padding: 18px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  margin-bottom: 16px;
}

.node-title {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 6px;
}

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

.node-points {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin: 10px 0;
}

.node-points li {
  font-size: 14px;
  color: var(--ink);
  padding-left: 14px;
  position: relative;
}

.node-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--orange);
}

.node-link {
  font-size: 14px;
}

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

.pick-card {
  padding: 14px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.pick-media {
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--zone);
}

.pick-media img {
  width: 100%;
  height: 130px;
  object-fit: cover;
}

.pick-name {
  font-size: 16px;
  font-weight: 600;
}

.pick-text {
  font-size: 14px;
  color: var(--muted);
  margin: 0;
}

.pick-card .genre-tag {
  align-self: flex-start;
  margin-top: auto;
}

.section-checklist .check-item {
  align-items: center;
}

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

.next-card {
  display: block;
  padding: 18px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.next-card:hover {
  border-color: var(--indigo);
  text-decoration: none;
}

.next-name {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--ink);
}

.next-text {
  font-size: 14px;
  color: var(--muted);
  margin: 0;
}

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

.content-figure {
  margin: 16px 0;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--zone);
  border: 1px solid var(--line);
}

.content-figure img {
  width: 100%;
  height: 240px;
  object-fit: cover;
}

.content-figure figcaption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--muted);
  background: #FFFFFF;
}

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

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

.method-name {
  display: block;
  font-weight: 600;
  font-size: 15px;
  margin-bottom: 4px;
}

.method-desc {
  font-size: 14px;
  color: var(--muted);
}

.batch-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.genre-index-list {
  display: flex;
  flex-direction: column;
}

.genre-index-row {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 0;
  border-top: 1px dashed var(--line);
}

.genre-index-row:first-child {
  border-top: 0;
}

.genre-index-link {
  flex: 0 0 auto;
  font-size: 15px;
  font-weight: 600;
}

.genre-index-desc {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 14px;
  color: var(--muted);
}

.next-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.next-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
}

.next-link {
  font-size: 16px;
  font-weight: 600;
}

.next-desc,
.next-link-desc {
  font-size: 14px;
  color: var(--muted);
}

/* ============ rankings page ============ */

.content-media-inline {
  margin: 16px 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--zone);
}

.content-media-inline img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.content-media-inline figcaption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--muted);
  background: #FFFFFF;
}

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

.caliber-item {
  padding: 16px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.caliber-name {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
}

.caliber-item p {
  font-size: 14px;
  color: var(--muted);
  margin: 0;
}

.watchlist-group {
  margin-bottom: 24px;
}

.watchlist-group-title {
  font-size: 17px;
  font-weight: 600;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 4px;
}

.factor-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #FFFFFF;
}

.factor-table {
  min-width: 520px;
}

.factor-caption {
  padding: 12px 16px;
  text-align: left;
  font-size: 14px;
  color: var(--muted);
}

.factor-table th,
.factor-table td {
  padding: 12px 16px;
  text-align: left;
  font-size: 15px;
  border-top: 1px solid var(--line);
  vertical-align: top;
}

.factor-table thead th {
  background: var(--zone);
  font-weight: 600;
}

.factor-table tbody th {
  font-weight: 600;
}

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

.guide-section {
  padding: 40px 0;
  border-top: 1px solid var(--line);
}

.guide-section:first-of-type {
  border-top: 0;
  padding-top: 24px;
}

.guide-figure {
  margin: 16px 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--zone);
}

.guide-figure img {
  width: 100%;
  height: 240px;
  object-fit: cover;
}

.guide-figure figcaption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--muted);
  background: #FFFFFF;
}

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

.rhythm-node {
  padding: 18px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.rhythm-index {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--orange);
}

.rhythm-name {
  font-size: 17px;
  font-weight: 600;
  margin: 6px 0 4px;
}

.rhythm-desc {
  font-size: 14px;
  color: var(--muted);
}

.rhythm-todo {
  font-size: 14px;
  color: var(--indigo);
  margin: 0;
}

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

.step-item {
  padding: 18px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.step-index {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--orange);
}

.step-title {
  font-size: 17px;
  font-weight: 600;
  margin: 6px 0 4px;
}

.step-desc {
  font-size: 15px;
  color: var(--muted);
}

.step-tip {
  font-size: 14px;
  color: var(--indigo);
  margin: 0;
}

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

.pitfall-item {
  padding: 16px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-left: 3px solid var(--orange);
  border-radius: var(--radius);
}

.pitfall-name {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
}

.pitfall-fix {
  font-size: 14px;
  color: var(--muted);
  margin: 0;
}

.next-block {
  padding: 40px 0;
  border-top: 1px solid var(--line);
}

/* ============ faq page ============ */

.faq-group {
  padding: 36px 0;
  border-top: 1px solid var(--line);
}

.faq-group:first-of-type {
  border-top: 0;
  padding-top: 24px;
}

.section-media {
  margin: 0 0 18px;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--zone);
}

.section-media img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.section-media figcaption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--muted);
  background: #FFFFFF;
}

/* ============ about page ============ */

.layout-about {
  grid-template-columns: minmax(0, 1fr) 280px;
}

.content-block {
  padding: 32px 0;
  border-top: 1px solid var(--line);
}

.content-block:first-of-type {
  padding-top: 8px;
  border-top: 0;
}

.content-block h2 {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 10px;
}

.principle-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 14px;
}

.principle-item {
  padding: 16px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.principle-name {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
}

.principle-item p {
  font-size: 14px;
  color: var(--muted);
  margin: 0;
}

.boundary-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 14px;
}

.boundary-item {
  padding: 14px 16px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-left: 3px solid var(--indigo);
  border-radius: var(--radius);
}

.boundary-name {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
}

.boundary-item p {
  font-size: 14px;
  color: var(--muted);
  margin: 0;
}

.maintenance-list {
  margin: 14px 0 0;
  padding: 0;
}

.maintenance-term {
  font-weight: 600;
  font-size: 15px;
  margin-top: 12px;
}

.maintenance-term:first-of-type {
  margin-top: 0;
}

.maintenance-desc {
  margin: 2px 0 0;
  font-size: 14px;
  color: var(--muted);
}

.content-aside {
  padding: 20px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  position: sticky;
  top: 20px;
}

.content-aside h2 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 10px;
}

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

.aside-item {
  font-size: 14px;
  color: var(--muted);
  padding-left: 14px;
  position: relative;
}

.aside-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--green);
}

.aside-links {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px dashed var(--line);
}

.aside-links-title {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 8px;
}

.aside-links ul {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.aside-links a {
  font-size: 14px;
}

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

.error-main {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 60px 20px 80px;
}

.error-panel {
  max-width: 640px;
  padding: 32px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.error-code {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--orange);
  margin-bottom: 8px;
}

.error-title {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 12px;
}

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

.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 20px 0 14px;
}

.error-note {
  font-size: 13px;
  color: var(--muted);
}

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

.site-footer {
  background: var(--deep);
  color: #C9CDDA;
  margin-top: 40px;
}

.footer-inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 40px 20px 24px;
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) repeat(4, minmax(0, 1fr));
  gap: 28px;
}

.footer-brand-name {
  font-size: 17px;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 8px;
}

.footer-brand-desc {
  font-size: 14px;
  color: #9BA2B8;
  max-width: 28em;
}

.footer-col-title {
  font-size: 15px;
  font-weight: 600;
  color: #FFFFFF;
  margin-bottom: 10px;
}

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

.footer-links a {
  font-size: 14px;
  color: #C9CDDA;
}

.footer-links a:hover {
  color: #FFFFFF;
}

.footer-bottom {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 18px 20px 28px;
  border-top: 1px solid #3A4157;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  font-size: 13px;
  color: #9BA2B8;
}

.footer-position {
  color: #C9CDDA;
  margin: 0;
}

.footer-boundary {
  margin: 0;
  flex: 1 1 320px;
}

.footer-copy {
  margin: 0;
}

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

@media (max-width: 1080px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
  }

  .hero-figure img {
    height: 220px;
  }

  .batch-board,
  .genre-grid,
  .flow-timeline,
  .path-timeline,
  .pick-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .update-columns,
  .batch-grid,
  .caliber-list,
  .step-list,
  .principle-list,
  .path-list,
  .next-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .method-list,
  .pitfall-list,
  .filter-points,
  .rhythm-timeline {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .layout-shell.sidebar-left {
    grid-template-columns: minmax(0, 1fr);
  }

  .sidebar {
    position: static;
  }

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

  .content-aside {
    position: static;
  }

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

@media (max-width: 768px) {
  .header-inner {
    min-height: 56px;
    padding: 0 16px;
    gap: 12px;
  }

  .brand-slogan {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    flex: 1 0 100%;
    margin-left: 0;
    order: 3;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 0;
    border-top: 1px solid var(--line);
  }

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

  .nav-item a {
    min-height: 44px;
    display: flex;
    align-items: center;
    padding: 10px 4px;
    border-bottom: 1px solid var(--line);
  }

  .nav-item.is-current a,
  .nav-item a.is-current {
    border-bottom-color: var(--line);
  }

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

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

  .section-title,
  .section-head-simple,
  .content-block h2 {
    font-size: 18px;
  }

  .hero-inner {
    padding: 32px 16px 28px;
  }

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

  .hero-figure img {
    height: 180px;
  }

  .hero-board {
    padding: 28px 16px 4px;
  }

  .genre-strip {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 8px;
    -webkit-overflow-scrolling: touch;
  }

  .genre-chip {
    flex: 0 0 auto;
  }

  .toc-list {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 4px;
    -webkit-overflow-scrolling: touch;
  }

  .toc-item {
    flex: 0 0 auto;
  }

  .batch-board,
  .genre-grid,
  .flow-timeline,
  .path-timeline,
  .pick-grid,
  .update-columns,
  .batch-grid,
  .caliber-list,
  .step-list,
  .principle-list,
  .path-list,
  .next-grid,
  .method-list,
  .pitfall-list,
  .filter-points,
  .rhythm-timeline {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .about-brief-body {
    grid-template-columns: minmax(0, 1fr);
  }

  .genre-index-row {
    flex-wrap: wrap;
    gap: 6px 10px;
  }

  .genre-index-desc {
    flex: 1 0 100%;
  }

  .rank-row {
    flex-wrap: wrap;
  }

  .rank-note {
    flex: 1 0 100%;
  }

  .compare-table,
  .factor-table {
    display: block;
    overflow-x: auto;
  }

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

  .compare-table thead {
    display: none;
  }

  .compare-table tr {
    border-top: 1px solid var(--line);
    padding: 8px 0;
  }

  .compare-table tbody th {
    padding: 8px 16px 4px;
  }

  .compare-table td {
    border-top: 0;
    padding: 4px 16px;
  }

  .content-figure img,
  .content-media-inline img,
  .section-media img,
  .guide-figure img,
  .feature-figure img {
    height: 180px;
  }

  .footer-inner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    padding: 28px 16px 20px;
    gap: 22px;
  }

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

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

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

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
}