:root {
  --paper: #FAF8F4;
  --ink: #1F1B16;
  --ink-soft: #4A443C;
  --ink-mute: #6E675D;
  --line: #E3DED6;
  --line-strong: #CFC7BB;
  --blue: #2F5D8C;
  --blue-dark: #24486D;
  --orange: #C4643B;
  --green: #4A7A5C;
  --card: #FFFFFF;
  --radius: 6px;
  --radius-sm: 4px;
  --shadow-hover: 0 6px 18px rgba(31, 27, 22, 0.08);
  --font-head: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --maxw: 1120px;
  --gap: 24px;
}

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

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

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

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

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

a {
  color: var(--blue);
  text-decoration: none;
  transition: color 0.18s ease;
}

a:hover {
  color: var(--blue-dark);
  text-decoration: underline;
}

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

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

p {
  margin: 0;
}

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

figure {
  margin: 0;
}

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

button {
  font-family: inherit;
  font-size: inherit;
  cursor: pointer;
}

.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 : shell
   ============================================================ */

.site-body {
  display: block;
  min-height: 100vh;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
}

.fact-bar {
  background: var(--ink);
  color: #F3EFE8;
  font-size: 13px;
  line-height: 1.6;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 64px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 19px;
  text-decoration: none;
}

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

.brand-mark {
  display: inline-block;
  width: 22px;
  height: 22px;
  border-radius: 3px;
  background: var(--blue);
  position: relative;
  flex: none;
}

.brand-mark::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 5px;
  width: 12px;
  height: 12px;
  background: var(--paper);
  border-radius: 1px;
}

.brand-text {
  letter-spacing: 0;
}

.site-nav {
  display: block;
}

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

.nav-list li {
  display: block;
}

.nav-list a {
  display: inline-block;
  padding: 10px 14px;
  min-height: 44px;
  line-height: 24px;
  color: var(--ink-soft);
  font-size: 15px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  border-bottom: 2px solid transparent;
}

.nav-list a:hover {
  color: var(--blue);
  background: rgba(47, 93, 140, 0.06);
  text-decoration: none;
}

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

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--card);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
}

.nav-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--ink);
  border-radius: 1px;
}

.site-main {
  display: block;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 32px 24px 56px;
}

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

.site-footer {
  background: #F2EEE7;
  border-top: 1px solid var(--line);
  margin-top: 24px;
}

.footer-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 36px 24px 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
  justify-content: space-between;
}

.footer-brand {
  flex: 1 1 260px;
  max-width: 340px;
}

.footer-name {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 17px;
  color: var(--ink);
  margin-bottom: 6px;
}

.footer-desc {
  font-size: 14px;
  color: var(--ink-mute);
  line-height: 1.7;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
}

.footer-group {
  min-width: 140px;
}

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

.footer-group ul {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-group a {
  font-size: 14px;
  color: var(--ink-soft);
  text-decoration: none;
}

.footer-group a:hover {
  color: var(--blue);
  text-decoration: underline;
}

.footer-copy {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 14px 24px 24px;
  font-size: 13px;
  color: var(--ink-mute);
  border-top: 1px solid var(--line);
}

/* ============================================================
   layout : inner page skeleton
   ============================================================ */

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--ink-mute);
  margin-bottom: 18px;
}

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

.breadcrumb a:hover {
  color: var(--blue);
  text-decoration: underline;
}

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

.breadcrumb-current {
  color: var(--ink);
  font-weight: 600;
}

.page-header {
  padding-bottom: 22px;
  margin-bottom: 28px;
  border-bottom: 1px solid var(--line);
}

.page-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 12px;
}

.page-description {
  max-width: 760px;
  font-size: 16px;
  color: var(--ink-soft);
  line-height: 1.75;
}

.page-fact,
.page-meta {
  margin-top: 10px;
  font-size: 14px;
  color: var(--ink-mute);
}

/* ============================================================
   components : buttons, tags, section heads
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.btn:hover {
  text-decoration: none;
}

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

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

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

.btn-ghost:hover {
  background: rgba(47, 93, 140, 0.08);
  color: var(--blue-dark);
}

.tag {
  display: inline-block;
  padding: 1px 8px;
  border-radius: 3px;
  font-size: 12px;
  line-height: 1.7;
  font-weight: 600;
  white-space: nowrap;
}

.tag-genre {
  background: rgba(47, 93, 140, 0.1);
  color: var(--blue);
}

.tag-status,
.tag-done,
.tag-pause {
  background: rgba(196, 100, 59, 0.12);
  color: var(--orange);
}

.tag-done {
  background: rgba(74, 122, 92, 0.14);
  color: var(--green);
}

.tag-pause {
  background: rgba(110, 103, 93, 0.14);
  color: var(--ink-mute);
}

.section {
  margin-bottom: 48px;
}

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

.section-head h2 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 8px;
}

.section-head p {
  font-size: 15px;
  color: var(--ink-mute);
  max-width: 760px;
}

.section-title {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 8px;
}

.section-intro {
  font-size: 15px;
  color: var(--ink-mute);
  max-width: 760px;
  margin-bottom: 20px;
}

.section-more {
  margin-top: 16px;
  font-size: 15px;
}

.section-more a,
.link-more,
.col-more a {
  font-weight: 600;
  color: var(--blue);
}

.section-footnote {
  margin-top: 20px;
  font-size: 14px;
  color: var(--ink-mute);
}

.copy-link {
  min-height: 32px;
  padding: 4px 12px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background: var(--card);
  color: var(--ink-soft);
  font-size: 13px;
  transition: border-color 0.18s ease, color 0.18s ease;
}

.copy-link:hover {
  border-color: var(--blue);
  color: var(--blue);
}

/* ============================================================
   components : shared card / row hover
   ============================================================ */

.cover-card,
.collection-card,
.index-cell,
.sample-card,
.next-entry,
.ranking-item,
.transition-item,
.update-item {
  transition: border-color 0.18s ease, transform 0.18s ease, box-shadow 0.18s ease;
}

/* ============================================================
   pages : index
   ============================================================ */

.home-main {
  padding-top: 28px;
}

.hero-compare {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  gap: 40px;
  align-items: center;
  padding-bottom: 40px;
  margin-bottom: 44px;
  border-bottom: 1px solid var(--line);
}

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

.hero-title {
  font-size: 34px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 16px;
}

.hero-lead {
  font-size: 16px;
  color: var(--ink-soft);
  margin-bottom: 12px;
  max-width: 520px;
}

.hero-note {
  font-size: 14px;
  color: var(--ink-mute);
  margin-bottom: 24px;
  max-width: 520px;
}

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

.hero-wall {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

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

.cover-card:hover {
  border-color: var(--line-strong);
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

.cover-card img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  background: #EDE8E0;
}

.cover-card figcaption {
  padding: 8px 10px 10px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.cover-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.4;
}

/* --- genre overview --- */

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

.genre-row {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 18px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.genre-no {
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 700;
  color: var(--blue);
  line-height: 1.3;
}

.genre-body {
  min-width: 0;
}

.genre-name {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 6px;
}

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

.genre-name a:hover {
  color: var(--blue);
  text-decoration: underline;
}

.genre-scope {
  font-size: 15px;
  color: var(--ink-soft);
  margin-bottom: 4px;
}

.genre-sample {
  font-size: 14px;
  color: var(--ink-mute);
}

/* --- updates brief --- */

.update-groups {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.update-group {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px;
}

.update-group-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

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

.update-row {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr) auto;
  gap: 10px;
  align-items: baseline;
  padding: 9px 0;
  border-bottom: 1px dashed var(--line);
  font-size: 14px;
}

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

.update-work {
  font-weight: 600;
  color: var(--ink);
  min-width: 0;
}

.update-genre {
  color: var(--ink-mute);
  min-width: 0;
}

.update-pos {
  color: var(--orange);
  font-size: 13px;
  white-space: nowrap;
}

/* --- duo panel --- */

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

.duo-col {
  min-width: 0;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 22px;
}

.col-head {
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.col-head h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 4px;
}

.col-head p {
  font-size: 14px;
  color: var(--ink-mute);
}

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

.rank-row {
  display: grid;
  grid-template-columns: 32px minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  padding: 9px 0;
  border-bottom: 1px dashed var(--line);
  font-size: 14px;
}

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

.rank-no {
  font-family: var(--font-head);
  font-weight: 700;
  color: var(--orange);
}

.rank-work {
  font-weight: 600;
  color: var(--ink);
  min-width: 0;
}

.rank-genre {
  color: var(--ink-mute);
  min-width: 0;
}

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

.duo-collection {
  display: flex;
  flex-direction: column;
}

.collection-card {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr);
  grid-template-rows: auto auto auto;
  column-gap: 14px;
  row-gap: 4px;
  padding: 14px 0;
  border-bottom: 1px dashed var(--line);
}

.collection-card:last-of-type {
  border-bottom: 0;
}

.collection-card:hover {
  transform: translateY(-2px);
}

.collection-card img {
  grid-row: 1 / span 3;
  width: 88px;
  height: 110px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: #EDE8E0;
}

.collection-name {
  font-size: 16px;
  font-weight: 700;
}

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

.collection-card .link-more {
  font-size: 14px;
}

/* --- reading steps --- */

.step-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.step-item {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 18px 20px;
}

.step-no,
.step-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(47, 93, 140, 0.1);
  color: var(--blue);
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 10px;
}

.step-name {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 6px;
}

.step-desc,
.step-text {
  font-size: 14px;
  color: var(--ink-mute);
  line-height: 1.7;
}

/* --- site index --- */

.index-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 16px;
}

.index-cell {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 16px 18px;
}

.index-cell:hover {
  border-color: var(--line-strong);
  transform: translateY(-2px);
}

.index-cell h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 6px;
}

.index-cell h3 a {
  color: var(--ink);
  text-decoration: none;
}

.index-cell h3 a:hover {
  color: var(--blue);
  text-decoration: underline;
}

.index-cell p {
  font-size: 14px;
  color: var(--ink-mute);
  line-height: 1.7;
}

/* ============================================================
   pages : genre
   ============================================================ */

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

.genre-table .genre-row {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr) minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 18px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.genre-cell {
  min-width: 0;
}

.genre-cell-label,
.genre-no-label {
  display: block;
  font-size: 12px;
  color: var(--ink-mute);
  margin-bottom: 4px;
}

.genre-no-value {
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 700;
  color: var(--blue);
}

.genre-name-title {
  font-size: 17px;
  font-weight: 700;
}

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

.genre-name-title a:hover {
  color: var(--blue);
  text-decoration: underline;
}

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

.genre-sample-section {
  margin-bottom: 48px;
}

.genre-sample-group {
  margin-bottom: 28px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line);
}

.genre-sample-group:last-child {
  border-bottom: 0;
  margin-bottom: 0;
  padding-bottom: 0;
}

.sample-group-head {
  margin-bottom: 14px;
}

.sample-group-title {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 4px;
}

.sample-group-desc {
  font-size: 14px;
  color: var(--ink-mute);
}

.sample-card-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
}

.sample-card {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 14px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px;
}

.sample-card:hover {
  border-color: var(--line-strong);
  transform: translateY(-2px);
}

.sample-figure {
  min-width: 0;
}

.sample-figure img {
  width: 96px;
  height: 124px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  background: #EDE8E0;
}

.sample-card-body {
  min-width: 0;
}

.sample-card-title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 4px;
}

.sample-card-meta {
  font-size: 13px;
  color: var(--blue);
  margin-bottom: 6px;
}

.sample-card-desc {
  font-size: 14px;
  color: var(--ink-mute);
  line-height: 1.7;
}

.genre-boundary-section {
  margin-bottom: 48px;
}

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

.boundary-col {
  min-width: 0;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 20px;
}

.boundary-col-title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

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

.boundary-item {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.7;
}

.boundary-item::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--blue);
}

.genre-next-section {
  margin-bottom: 24px;
}

.next-entry-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

.next-entry {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px;
}

.next-entry:hover {
  border-color: var(--line-strong);
  transform: translateY(-2px);
}

.next-entry-title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 6px;
}

.next-entry-title a {
  color: var(--ink);
  text-decoration: none;
}

.next-entry-title a:hover {
  color: var(--blue);
  text-decoration: underline;
}

.next-entry-desc {
  font-size: 14px;
  color: var(--ink-mute);
  line-height: 1.7;
}

/* ============================================================
   pages : updates
   ============================================================ */

.updates-stages {
  margin-bottom: 48px;
}

.stage-group {
  margin-bottom: 28px;
}

.stage-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 4px;
  padding-left: 10px;
  border-left: 4px solid var(--blue);
}

.stage-ongoing .stage-title {
  border-left-color: var(--orange);
}

.stage-finished .stage-title {
  border-left-color: var(--green);
}

.stage-paused .stage-title {
  border-left-color: var(--ink-mute);
}

.stage-note {
  font-size: 14px;
  color: var(--ink-mute);
  margin-bottom: 12px;
  padding-left: 14px;
}

.updates-stages .update-list {
  border-top: 1px solid var(--line);
}

.update-item {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr) auto auto;
  gap: 14px;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.update-item:hover {
  background: rgba(47, 93, 140, 0.03);
}

.update-thumb {
  min-width: 0;
}

.update-thumb img {
  width: 56px;
  height: 72px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: #EDE8E0;
}

.update-body {
  min-width: 0;
}

.update-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 2px;
}

.update-meta {
  font-size: 13px;
  color: var(--ink-mute);
}

.status-tag {
  display: inline-block;
  padding: 1px 8px;
  border-radius: 3px;
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
}

.status-ongoing {
  background: rgba(196, 100, 59, 0.12);
  color: var(--orange);
}

.status-finished {
  background: rgba(74, 122, 92, 0.14);
  color: var(--green);
}

.status-paused {
  background: rgba(110, 103, 93, 0.14);
  color: var(--ink-mute);
}

.field-notes {
  margin-bottom: 48px;
}

.field-figure {
  margin-bottom: 20px;
}

.field-figure img {
  width: 100%;
  max-width: 720px;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: #EDE8E0;
}

.field-figure figcaption {
  margin-top: 8px;
  font-size: 13px;
  color: var(--ink-mute);
}

.field-table {
  max-width: 760px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--card);
}

.field-table caption,
.field-table-caption {
  caption-side: top;
  text-align: left;
  padding: 12px 16px;
  font-size: 14px;
  color: var(--ink-mute);
  background: #F5F1EA;
  border-bottom: 1px solid var(--line);
}

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

.field-table thead th {
  background: #F7F3EC;
  font-family: var(--font-head);
  font-weight: 700;
  color: var(--ink);
  font-size: 14px;
}

.field-table tbody th {
  width: 160px;
  font-weight: 600;
  color: var(--ink);
  background: #FCFAF6;
}

.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;
}

.stage-transitions {
  margin-bottom: 24px;
}

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

.transition-item {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 20px;
}

.transition-item h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
}

.transition-item p {
  font-size: 14px;
  color: var(--ink-mute);
  line-height: 1.7;
}

/* ============================================================
   pages : ranking
   ============================================================ */

.ranking-section {
  margin-bottom: 48px;
}

.section-note {
  font-size: 15px;
  color: var(--ink-mute);
  max-width: 760px;
  margin-bottom: 20px;
}

.ranking-list {
  border-top: 1px solid var(--line);
}

.ranking-item {
  display: grid;
  grid-template-columns: 44px 64px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.ranking-item:hover {
  background: rgba(47, 93, 140, 0.03);
}

.ranking-position {
  font-family: var(--font-head);
  font-size: 22px;
  font-weight: 700;
  color: var(--orange);
  line-height: 1.2;
}

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

.ranking-cover img {
  width: 64px;
  height: 84px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: #EDE8E0;
}

.ranking-body {
  min-width: 0;
}

.ranking-name {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 4px;
}

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

.ranking-name a:hover {
  color: var(--blue);
  text-decoration: underline;
}

.ranking-genre {
  display: inline-block;
  font-size: 13px;
  color: var(--blue);
  margin-right: 10px;
}

.ranking-status {
  display: inline-block;
  font-size: 13px;
  padding: 0 8px;
  border-radius: 3px;
}

.ranking-reason {
  margin-top: 6px;
  font-size: 14px;
  color: var(--ink-mute);
  line-height: 1.7;
}

.ranking-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-top: 18px;
}

.ranking-hint {
  font-size: 14px;
  color: var(--ink-mute);
}

.ranking-criteria {
  margin-bottom: 48px;
}

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

.criteria-col {
  min-width: 0;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 20px;
}

.criteria-col h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

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

.criteria-list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.7;
}

.criteria-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--blue);
}

.ranking-shift {
  margin-bottom: 48px;
}

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

.shift-col {
  min-width: 0;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 20px;
}

.shift-col h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
}

.shift-col p {
  font-size: 14px;
  color: var(--ink-mute);
  line-height: 1.7;
}

.shift-note {
  margin-top: 16px;
  font-size: 14px;
  color: var(--ink-mute);
}

.ranking-links {
  margin-bottom: 24px;
}

.link-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.link-list li a {
  display: inline-block;
  padding: 8px 16px;
  min-height: 44px;
  line-height: 26px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  color: var(--blue);
  text-decoration: none;
}

.link-list li a:hover {
  border-color: var(--blue);
  background: rgba(47, 93, 140, 0.06);
  text-decoration: none;
}

/* ============================================================
   pages : guide
   ============================================================ */

.guide-fields {
  margin-bottom: 48px;
}

.guide-figure {
  margin-bottom: 20px;
}

.guide-figure img {
  width: 100%;
  max-width: 720px;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: #EDE8E0;
}

.guide-figure figcaption {
  margin-top: 8px;
  font-size: 13px;
  color: var(--ink-mute);
}

.guide-order {
  margin-bottom: 48px;
}

.guide-boundary {
  margin-bottom: 48px;
}

.guide-boundary .boundary-list {
  max-width: 760px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 20px;
  gap: 12px;
}

.guide-faq {
  margin-bottom: 48px;
}

.faq-list {
  max-width: 760px;
  border-top: 1px solid var(--line);
}

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

.faq-question {
  display: block;
  padding: 14px 4px;
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
}

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

.faq-question::before {
  content: "＋";
  display: inline-block;
  width: 20px;
  color: var(--blue);
  font-weight: 700;
}

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

.faq-question:hover {
  color: var(--blue);
}

.faq-answer {
  padding: 0 4px 16px 24px;
  font-size: 14px;
  color: var(--ink-mute);
  line-height: 1.75;
}

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

.index-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 14px;
}

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

.index-item a {
  display: block;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 4px;
}

.index-note {
  display: block;
  font-size: 13px;
  color: var(--ink-mute);
  line-height: 1.7;
}

/* ============================================================
   pages : 404
   ============================================================ */

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

.error-hero {
  padding: 24px 0 32px;
  margin-bottom: 36px;
  border-bottom: 1px solid var(--line);
}

.error-code {
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 700;
  color: var(--orange);
  margin-bottom: 10px;
}

.error-hero h1 {
  font-size: 30px;
  font-weight: 700;
  margin-bottom: 14px;
}

.error-desc {
  max-width: 640px;
  font-size: 16px;
  color: var(--ink-soft);
  margin-bottom: 22px;
}

.error-paths {
  margin-bottom: 36px;
}

.error-paths h2 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 8px;
}

.section-desc {
  font-size: 15px;
  color: var(--ink-mute);
  margin-bottom: 18px;
}

.error-path-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
}

.error-path-list li a {
  display: block;
  padding: 14px 16px;
  min-height: 44px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  color: var(--blue);
  text-decoration: none;
}

.error-path-list li a:hover {
  border-color: var(--blue);
  background: rgba(47, 93, 140, 0.06);
  text-decoration: none;
}

.error-note {
  margin-bottom: 24px;
}

.error-note h2 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 8px;
}

.error-note p {
  max-width: 760px;
  font-size: 15px;
  color: var(--ink-mute);
  line-height: 1.75;
}

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

@media (prefers-reduced-motion: no-preference) {
  .section-head,
  .genre-row,
  .update-group,
  .step-item,
  .index-cell,
  .transition-item,
  .ranking-item {
    animation: rise-in 0.45s ease both;
  }
}

@keyframes rise-in {
  from {
    opacity: 0.001;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================================
   responsive : 900px
   ============================================================ */

@media (max-width: 900px) {
  .header-inner {
    padding: 10px 18px;
    min-height: 60px;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    padding: 0 18px;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 0 14px;
  }

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

  .nav-list a {
    display: block;
    padding: 12px 8px;
    min-height: 44px;
    border-bottom: 1px solid var(--line);
    border-radius: 0;
  }

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

  .site-main {
    padding: 24px 18px 44px;
  }

  .hero-compare {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
    padding-bottom: 32px;
    margin-bottom: 36px;
  }

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

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

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

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

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

  .genre-table .genre-row {
    grid-template-columns: 64px minmax(0, 1fr);
    row-gap: 10px;
  }

  .genre-table .genre-scope,
  .genre-table .genre-tone {
    grid-column: 2 / -1;
  }

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

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

  .ranking-item {
    grid-template-columns: 36px 56px minmax(0, 1fr);
    gap: 12px;
  }

  .ranking-cover img {
    width: 56px;
    height: 74px;
  }

  .footer-inner {
    padding: 28px 18px 16px;
    gap: 24px;
  }

  .footer-nav {
    gap: 28px;
  }

  .footer-copy {
    padding: 14px 18px 20px;
  }
}

/* ============================================================
   responsive : 600px
   ============================================================ */

@media (max-width: 600px) {
  .fact-bar p {
    padding: 7px 16px;
    font-size: 12px;
  }

  .brand {
    font-size: 17px;
  }

  .site-main {
    padding: 20px 16px 40px;
  }

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

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

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

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .genre-row {
    grid-template-columns: 40px minmax(0, 1fr);
    gap: 12px;
  }

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

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

  .update-genre {
    grid-column: 1 / -1;
  }

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

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

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

  .genre-table .genre-scope,
  .genre-table .genre-tone {
    grid-column: auto;
  }

  .sample-card-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .sample-card {
    grid-template-columns: 80px minmax(0, 1fr);
  }

  .sample-figure img {
    width: 80px;
    height: 104px;
  }

  .update-item {
    grid-template-columns: 48px minmax(0, 1fr);
    row-gap: 8px;
  }

  .update-thumb img {
    width: 48px;
    height: 62px;
  }

  .update-item .status-tag,
  .update-item .copy-link {
    justify-self: start;
  }

  .ranking-item {
    grid-template-columns: 32px 52px minmax(0, 1fr);
    gap: 10px;
  }

  .ranking-cover img {
    width: 52px;
    height: 68px;
  }

  .ranking-position {
    font-size: 18px;
  }

  .field-table tbody th {
    width: 108px;
    font-size: 14px;
  }

  .field-table th,
  .field-table td {
    padding: 10px 12px;
    font-size: 14px;
  }

  .field-figure img,
  .guide-figure img {
    aspect-ratio: 4 / 3;
  }

  .collection-card {
    grid-template-columns: 72px minmax(0, 1fr);
  }

  .collection-card img {
    width: 72px;
    height: 92px;
  }

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

  .footer-inner {
    flex-direction: column;
    gap: 20px;
  }

  .footer-brand {
    max-width: none;
  }

  .footer-nav {
    flex-direction: column;
    gap: 18px;
  }
}