:root {
  --paper: #f5f2ec;
  --card: #fffdfa;
  --ink-green: #1e3d3a;
  --brick: #b5562c;
  --line: #ddd6c9;
  --ink: #26312f;
  --ink-soft: #5e6b67;
  --tag-bg: #eae4d8;
  --radius: 4px;
  --font-sans: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --container: 1120px;
  --pad: 20px;
}

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

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

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink);
  background-color: var(--paper);
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--ink-green);
}

p {
  margin: 0;
}

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

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

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

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

figure {
  margin: 0;
}

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

:focus-visible {
  outline: 2px solid var(--brick);
  outline-offset: 2px;
}

.mono {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
}

/* layout */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: var(--card);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  max-width: var(--container);
  height: 60px;
  margin: 0 auto;
  padding: 0 var(--pad);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.brand-mark {
  width: 22px;
  height: 22px;
  border: 2px solid var(--ink-green);
  border-radius: var(--radius);
  position: relative;
}

.brand-mark::after {
  content: "";
  position: absolute;
  inset: 4px;
  background-color: var(--brick);
  border-radius: 1px;
}

.brand-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--ink-green);
  white-space: nowrap;
}

.site-nav {
  flex: 1 1 auto;
  display: flex;
  justify-content: flex-end;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 22px;
}

.nav-link {
  display: inline-block;
  padding: 20px 0 18px;
  font-size: 14px;
  color: var(--ink-soft);
  border-bottom: 2px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.nav-link:hover {
  color: var(--ink-green);
}

.nav-link.is-current {
  color: var(--ink-green);
  font-weight: 600;
  border-bottom-color: var(--brick);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 44px;
  height: 44px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--card);
}

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

.site-main {
  display: block;
}

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

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

/* breadcrumb & page header */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 20px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
}

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

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

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

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

.page-header {
  padding: 18px 0 0;
}

.page-title {
  font-size: clamp(26px, 3vw, 34px);
  line-height: 1.3;
  font-weight: 600;
  color: var(--ink-green);
}

.page-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 0 22px;
  border-bottom: 1px solid var(--line);
}

.page-title-block {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.page-title-main {
  max-width: 780px;
}

.page-title-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  max-width: var(--container);
  margin: 0 auto;
  padding: 22px var(--pad);
}

.page-title-text {
  max-width: 780px;
}

.page-kicker,
.section-kicker {
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--brick);
}

.page-lead,
.page-lede {
  margin-top: 10px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
  max-width: 68ch;
}

.page-meta,
.page-title-meta,
.page-title-aside {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
}

.rule {
  height: 1px;
  margin: 0;
  border: 0;
  background-color: var(--line);
}

/* footer */
.site-footer {
  background-color: var(--ink-green);
  color: #e8e4da;
}

.footer-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--pad);
}

.footer-top {
  padding: 32px 0 28px;
  border-bottom: 1px solid rgba(232, 228, 218, 0.18);
}

.footer-primary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 16px;
  color: #f5f2ec;
}

.footer-primary:hover {
  color: #f0c9a8;
}

.footer-primary-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: #c9a184;
}

.footer-primary-text {
  font-size: clamp(20px, 2.4vw, 26px);
  font-weight: 600;
  border-bottom: 1px solid transparent;
}

.footer-primary:hover .footer-primary-text {
  border-bottom-color: #f0c9a8;
}

.footer-mid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr);
  gap: 40px;
  padding: 28px 0;
}

.footer-name {
  font-size: 15px;
  font-weight: 600;
  color: #f5f2ec;
}

.footer-desc {
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.7;
  color: #b9c4c0;
  max-width: 42ch;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px 32px;
}

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

.footer-col a {
  font-size: 13px;
  color: #d5dcd8;
}

.footer-col a:hover {
  color: #f0c9a8;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  padding: 18px 0 26px;
  border-top: 1px solid rgba(232, 228, 218, 0.18);
}

.footer-note,
.footer-meta {
  font-size: 12px;
  line-height: 1.7;
  color: #a7b3ae;
}

.footer-meta {
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
}

/* components */
.btn,
.btn-primary,
.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 22px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.btn-primary {
  background-color: var(--ink-green);
  color: #f5f2ec;
}

.btn-primary:hover {
  background-color: #16302e;
  color: #ffffff;
}

.btn-ghost {
  background-color: transparent;
  color: var(--ink-green);
  border-color: var(--line);
}

.btn-ghost:hover {
  border-color: var(--ink-green);
  color: var(--ink-green);
}

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--brick);
  border-bottom: 1px solid transparent;
  padding: 10px 0;
}

.link-arrow::after {
  content: "→";
  font-family: var(--font-mono);
}

.link-arrow:hover {
  border-bottom-color: var(--brick);
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 16px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 22px;
}

.section-head h2 {
  font-size: 20px;
  line-height: 1.4;
}

.section-head .section-kicker {
  margin: 0;
  flex-basis: 100%;
}

.section-anchor {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
}

.section-anchor:hover {
  color: var(--brick);
}

.section-intro {
  max-width: 68ch;
  margin-bottom: 20px;
  color: var(--ink-soft);
  line-height: 1.75;
}

.tag {
  display: inline-block;
  padding: 2px 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-green);
  background-color: var(--tag-bg);
  border-radius: var(--radius);
  white-space: nowrap;
}

/* home: hero */
.home-main {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--pad) 72px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 420px;
  gap: 48px;
  padding: 48px 0 44px;
  border-bottom: 1px solid var(--line);
}

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

.hero-kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--brick);
  margin-bottom: 14px;
}

.hero h1 {
  font-size: clamp(30px, 4vw, 44px);
  line-height: 1.25;
  max-width: 16ch;
}

.hero-lead {
  margin-top: 16px;
  max-width: 56ch;
  color: var(--ink-soft);
}

.hero-points {
  margin-top: 22px;
  display: grid;
  gap: 10px;
}

.hero-points li {
  display: flex;
  gap: 12px;
  align-items: baseline;
  font-size: 14px;
  line-height: 1.7;
}

.point-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--brick);
  flex-shrink: 0;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 20px;
  margin-top: 28px;
}

.hero-visual {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

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

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

.hero-figure figcaption {
  padding: 10px 14px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--ink-soft);
  border-top: 1px solid var(--line);
}

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

.panel-title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.panel-list {
  display: grid;
  gap: 2px;
  margin-top: 8px;
}

.panel-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 10px;
  padding: 8px 6px;
  border-radius: var(--radius);
  transition: background-color 0.15s ease;
}

.panel-item:hover {
  background-color: var(--tag-bg);
}

.panel-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-green);
}

.panel-desc {
  flex-basis: 100%;
  font-size: 12px;
  line-height: 1.6;
  color: var(--ink-soft);
}

/* home: entry strip */
.entry-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  border-bottom: 1px solid var(--line);
}

.entry-cell {
  padding: 24px 22px 24px 0;
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: transform 0.15s ease;
}

.entry-cell + .entry-cell {
  padding-left: 22px;
}

.entry-cell:last-child {
  border-right: 0;
}

.entry-title {
  font-size: 16px;
  line-height: 1.4;
}

.entry-desc {
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.entry-link {
  margin-top: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--brick);
}

.entry-link::after {
  content: " →";
}

.entry-cell:hover {
  transform: translateY(-2px);
}

/* home: scope */
.scope-section {
  padding: 44px 0;
  border-bottom: 1px solid var(--line);
}

.scope-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 380px;
  gap: 40px;
  align-items: start;
}

.scope-text {
  display: grid;
  gap: 14px;
  max-width: 68ch;
  line-height: 1.8;
}

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

.scope-figure img {
  width: 100%;
  height: 210px;
  object-fit: cover;
}

.scope-figure figcaption {
  padding: 10px 14px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--ink-soft);
  border-top: 1px solid var(--line);
}

/* home: channel sync */
.channel-sync {
  padding: 44px 0;
  border-bottom: 1px solid var(--line);
}

.sync-layout {
  display: flex;
  gap: 32px;
  align-items: flex-start;
}

.sync-index {
  flex: 0 0 280px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--card);
  padding: 16px;
  position: sticky;
  top: 80px;
}

.index-title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.index-buttons {
  display: grid;
  gap: 4px;
  margin-top: 10px;
}

.index-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  min-height: 44px;
  padding: 8px 10px;
  text-align: left;
  font-size: 14px;
  color: var(--ink);
  border: 1px solid transparent;
  border-radius: var(--radius);
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.index-btn:hover {
  background-color: var(--tag-bg);
}

.index-btn.is-active {
  border-color: var(--ink-green);
  background-color: var(--tag-bg);
  color: var(--ink-green);
  font-weight: 600;
}

.index-btn .mono {
  color: var(--brick);
  flex-shrink: 0;
}

.sync-content {
  flex: 1 1 auto;
  min-width: 0;
}

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

.sync-group[hidden] {
  display: none;
}

.group-title {
  font-size: 18px;
  line-height: 1.4;
  margin-bottom: 8px;
}

.group-desc {
  color: var(--ink-soft);
  margin-bottom: 16px;
  max-width: 68ch;
}

.row-list {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.row-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

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

.row-topic {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-green);
}

.row-note {
  flex-basis: 100%;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.row-link {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--brick);
}

.row-link::after {
  content: " →";
}

/* home: latest list */
.latest-list {
  padding: 44px 0;
  border-bottom: 1px solid var(--line);
}

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

.latest-row {
  display: grid;
  grid-template-columns: 48px minmax(0, 1.1fr) auto minmax(0, 1.4fr) auto auto;
  align-items: baseline;
  gap: 14px;
  padding: 12px 4px;
  border-bottom: 1px solid var(--line);
  transition: background-color 0.15s ease;
}

.latest-row:hover {
  background-color: var(--card);
}

.latest-row .mono {
  color: var(--brick);
}

.latest-topic {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-green);
}

.latest-note {
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.latest-status {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  white-space: nowrap;
}

.latest-row .row-link {
  margin-left: 0;
}

/* home: collections */
.collection-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.collection-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--card);
  transition: transform 0.15s ease, border-color 0.15s ease;
}

.collection-card:hover {
  transform: translateY(-2px);
  border-color: var(--ink-green);
}

.card-title {
  font-size: 16px;
  line-height: 1.4;
}

.card-standard,
.card-makeup,
.card-dose {
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.card-dose {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--brick);
  margin-top: auto;
  padding-top: 6px;
}

/* home: flow + faq */
.flow-faq {
  padding: 44px 0;
  border-bottom: 1px solid var(--line);
}

.flow-steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--card);
  overflow: hidden;
}

.flow-step {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 18px 20px;
  border-right: 1px solid var(--line);
}

.flow-step:last-child {
  border-right: 0;
}

.step-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--brick);
}

.step-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink-green);
}

.step-desc {
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.faq-block {
  margin-top: 28px;
}

.faq-heading {
  font-size: 16px;
  margin-bottom: 12px;
}

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

.faq-item summary,
.faq-question {
  display: flex;
  align-items: baseline;
  gap: 10px;
  min-height: 44px;
  padding: 12px 0;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-green);
  cursor: pointer;
  list-style: none;
}

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

.faq-item summary::before,
.faq-question::before {
  content: "+";
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--brick);
  flex-shrink: 0;
}

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

.faq-answer {
  padding: 0 0 16px 24px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: 68ch;
}

/* home: boundary + related */
.boundary-note {
  margin: 40px 0 0;
  padding: 22px 24px;
  background-color: var(--tag-bg);
  border-radius: var(--radius);
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 20px;
}

.boundary-title {
  font-size: 16px;
  flex-basis: 100%;
}

.boundary-note p {
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink-soft);
  max-width: 68ch;
}

.boundary-note a {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--brick);
}

.related-links {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 18px;
  padding: 22px 0 0;
}

.related-links-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
}

.related-links-item {
  font-size: 14px;
  color: var(--ink-green);
  border-bottom: 1px solid var(--line);
}

.related-links-item:hover {
  border-bottom-color: var(--brick);
}

/* inner: page layout shells */
.page-layout {
  display: grid;
  gap: 40px;
  padding-top: 32px;
}

.sidebar-left .page-layout {
  grid-template-columns: minmax(0, 820px) minmax(0, 260px);
}

.page-layout.sidebar-left {
  grid-template-columns: minmax(0, 260px) minmax(0, 820px);
  align-items: start;
}

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

/* channels page */
.channel-aside {
  align-self: start;
  position: sticky;
  top: 80px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--card);
  padding: 16px;
}

.aside-title {
  font-size: 15px;
  line-height: 1.4;
}

.aside-hint {
  margin-top: 6px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--ink-soft);
}

.channel-index {
  display: grid;
  gap: 4px;
  margin-top: 12px;
}

.channel-index li {
  min-width: 0;
}

.channel-index-btn {
  display: flex;
  gap: 10px;
  width: 100%;
  min-height: 44px;
  padding: 8px 10px;
  text-align: left;
  border: 1px solid transparent;
  border-radius: var(--radius);
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.channel-index-btn:hover {
  background-color: var(--tag-bg);
}

.channel-index-btn.is-active {
  border-color: var(--ink-green);
  background-color: var(--tag-bg);
}

.idx-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--brick);
  flex-shrink: 0;
  padding-top: 2px;
}

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

.idx-name {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-green);
}

.idx-desc {
  display: block;
  font-size: 12px;
  line-height: 1.6;
  color: var(--ink-soft);
}

.channel-content {
  min-width: 0;
  display: grid;
  gap: 32px;
}

.channel-group {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--card);
  padding: 24px;
}

.group-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 240px;
  gap: 24px;
  align-items: start;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.group-text {
  min-width: 0;
}

.group-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--brick);
  margin-bottom: 6px;
}

.group-head h2 {
  font-size: 18px;
  line-height: 1.4;
  margin-bottom: 8px;
}

.group-head .group-text p:not(.group-num) {
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
  max-width: 62ch;
}

.group-head .group-text p + p {
  margin-top: 6px;
}

.group-figure {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background-color: var(--paper);
}

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

.group-figure figcaption {
  padding: 8px 10px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--ink-soft);
  border-top: 1px solid var(--line);
}

.entry-rows {
  display: grid;
}

.entry-row {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr) auto minmax(0, 1.4fr);
  align-items: baseline;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

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

.entry-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--brick);
}

.entry-topic {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-green);
}

.entry-tag {
  display: inline-block;
  padding: 2px 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-green);
  background-color: var(--tag-bg);
  border-radius: var(--radius);
  white-space: nowrap;
}

.entry-note {
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.tag-guide {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--card);
  padding: 24px;
}

.tag-note {
  margin-bottom: 16px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
  max-width: 68ch;
}

.tag-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.tag-table th,
.tag-table td {
  text-align: left;
  vertical-align: top;
  padding: 10px 12px 10px 0;
  border-bottom: 1px solid var(--line);
  line-height: 1.7;
}

.tag-table th {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  font-weight: 400;
  color: var(--ink-soft);
}

.tag-table td {
  color: var(--ink);
}

.tag-table tr:last-child td {
  border-bottom: 0;
}

/* next links (shared inner pattern) */
.next-links {
  margin-top: 40px;
}

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

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

.next-link {
  display: flex;
  flex-direction: column;
  gap: 4px;
  height: 100%;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--card);
  transition: transform 0.15s ease, border-color 0.15s ease;
}

.next-link:hover {
  transform: translateY(-2px);
  border-color: var(--ink-green);
}

.next-name,
.next-link-name,
.next-link-label,
.next-link-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink-green);
}

.next-desc,
.next-link-desc,
.next-link-text {
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.next-arrow,
.next-link-arrow {
  margin-top: auto;
  padding-top: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--brick);
}

.next-arrow::after,
.next-link-arrow::after {
  content: " →";
}

/* latest page */
.order-note {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 32px;
  align-items: start;
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
}

.order-note-text {
  max-width: 62ch;
  line-height: 1.8;
}

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

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

.legend-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 10px;
}

.legend-tag {
  display: inline-block;
  padding: 2px 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-green);
  background-color: var(--tag-bg);
  border-radius: var(--radius);
  white-space: nowrap;
}

.legend-desc {
  flex-basis: 100%;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.entry-list {
  display: grid;
  border-top: 1px solid var(--line);
  margin-top: 24px;
}

.entry-no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--brick);
}

.entry-theme {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-green);
}

.entry-state {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  white-space: nowrap;
}

.entry-footnote {
  margin-top: 14px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.tag-new,
.tag-revised,
.tag-pending {
  display: inline-block;
  padding: 2px 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  border-radius: var(--radius);
  white-space: nowrap;
}

.tag-new {
  color: #f5f2ec;
  background-color: var(--ink-green);
}

.tag-revised {
  color: var(--brick);
  background-color: var(--tag-bg);
}

.tag-pending {
  color: var(--ink-soft);
  background-color: transparent;
  border: 1px solid var(--line);
}

.time-flow {
  margin-top: 40px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}

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

.step-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--card);
}

.step-no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--brick);
}

.step-item .step-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink-green);
}

.step-op,
.step-result {
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.step-result {
  padding-top: 6px;
  border-top: 1px solid var(--line);
}

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

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

.latest-figure figcaption {
  padding: 10px 14px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--ink-soft);
  border-top: 1px solid var(--line);
}

/* collections page */
.capacity-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px 24px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--card);
  margin-bottom: 32px;
}

.capacity-bar-text {
  flex: 1 1 260px;
  min-width: 0;
}

.capacity-title {
  font-size: 16px;
  line-height: 1.4;
}

.capacity-desc {
  margin-top: 4px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.capacity-stepper {
  display: inline-flex;
  align-items: center;
  gap: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background-color: var(--paper);
}

.stepper-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  font-size: 18px;
  color: var(--ink-green);
  transition: background-color 0.15s ease;
}

.stepper-btn:hover:not(:disabled) {
  background-color: var(--tag-bg);
}

.stepper-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.stepper-value {
  min-width: 48px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--ink-green);
  border-left: 1px solid var(--line);
  border-right: 1px solid var(--line);
  line-height: 44px;
}

.capacity-hint {
  flex-basis: 100%;
  font-size: 12px;
  line-height: 1.6;
  color: var(--ink-soft);
}

.collection-section {
  margin-bottom: 40px;
}

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

.collection-media {
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.collection-media img {
  width: 100%;
  height: 160px;
  object-fit: cover;
}

.collection-card .collection-body {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px 20px 20px;
}

.collection-index {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--brick);
}

.collection-name {
  font-size: 16px;
  line-height: 1.4;
}

.collection-criteria,
.collection-compose {
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.collection-duration {
  margin-top: auto;
  padding-top: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-green);
  border-top: 1px solid var(--line);
}

.collection-card .collection-media + .collection-body {
  flex: 1 1 auto;
}

.collection-card {
  padding: 0;
  gap: 0;
  overflow: hidden;
}

.collection-card .label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
}

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

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

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

.sequence-heading {
  font-size: 16px;
  line-height: 1.4;
  margin-bottom: 10px;
}

.sequence-block p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.sequence-block p + p {
  margin-top: 8px;
}

/* guide page */
.flow-strip {
  padding: 32px 0 8px;
}

.flow-strip .flow-steps {
  border: 1px solid var(--line);
}

.step-details {
  padding: 32px 0 8px;
}

.step-detail {
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
  max-width: 780px;
}

.step-detail-title {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 16px;
  line-height: 1.5;
  margin-bottom: 8px;
}

.step-detail-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--brick);
}

.step-detail-text {
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink);
  max-width: 68ch;
}

.step-detail-done {
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
  padding-left: 12px;
  border-left: 2px solid var(--line);
}

.step-detail-done a {
  color: var(--brick);
  border-bottom: 1px solid transparent;
}

.step-detail-done a:hover {
  border-bottom-color: var(--brick);
}

.step-figure {
  margin: 20px 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background-color: var(--card);
  max-width: 780px;
}

.step-figure img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.figure-caption {
  padding: 10px 14px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--ink-soft);
  border-top: 1px solid var(--line);
}

.faq-list {
  padding: 32px 0 8px;
}

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

.display-note {
  padding: 32px 0 8px;
}

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

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

.display-item-title {
  font-size: 15px;
  line-height: 1.4;
  margin-bottom: 8px;
}

.display-item p {
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink-soft);
}

/* verify page */
.verify-section {
  padding: 32px 0 8px;
}

.verify-figure {
  margin-bottom: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background-color: var(--card);
}

.verify-figure img {
  width: 100%;
  height: 230px;
  object-fit: cover;
}

.verify-figure figcaption {
  padding: 10px 14px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--ink-soft);
  border-top: 1px solid var(--line);
}

.verify-checklist {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.verify-item {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.verify-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--brick);
  padding-top: 3px;
}

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

.verify-title {
  font-size: 16px;
  line-height: 1.4;
  margin-bottom: 6px;
}

.verify-action,
.verify-standard,
.verify-handle {
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink);
  max-width: 68ch;
}

.verify-standard {
  margin-top: 4px;
  color: var(--ink-soft);
}

.verify-handle {
  margin-top: 8px;
  padding-left: 12px;
  border-left: 2px solid var(--tag-bg);
  font-size: 13px;
  color: var(--ink-soft);
}

.feedback-section {
  padding: 32px 0 8px;
}

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

.feedback-row {
  display: flex;
  gap: 12px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--card);
}

.feedback-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--brick);
  flex-shrink: 0;
  padding-top: 2px;
}

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

.feedback-title {
  font-size: 15px;
  line-height: 1.4;
  margin-bottom: 4px;
}

.feedback-text {
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.feedback-note {
  margin-top: 16px;
  padding: 14px 16px;
  background-color: var(--tag-bg);
  border-radius: var(--radius);
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.misconception-section {
  padding: 32px 0 8px;
}

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

.misconception-head,
.misconception-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.misconception-head {
  background-color: var(--tag-bg);
}

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

.misconception-cell {
  min-width: 0;
  padding: 12px 16px;
  font-size: 14px;
  line-height: 1.7;
}

.misconception-head .misconception-cell {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-green);
}

.misconception-row .misconception-cell:first-child {
  font-weight: 600;
  color: var(--ink-green);
  border-right: 1px solid var(--line);
}

.misconception-row .misconception-cell:last-child {
  color: var(--ink-soft);
}

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

/* about page */
.section {
  padding: 32px 0;
  border-bottom: 1px solid var(--line);
}

.section:last-child {
  border-bottom: 0;
}

.section-nature .nature-body {
  display: grid;
  gap: 12px;
  max-width: 68ch;
  line-height: 1.8;
}

.section-figure {
  margin-top: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background-color: var(--card);
  max-width: 720px;
}

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

.section-figure figcaption {
  padding: 10px 14px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--ink-soft);
  border-top: 1px solid var(--line);
}

.scope-columns {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 32px;
  align-items: start;
}

.scope-col {
  min-width: 0;
}

.scope-list {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.scope-item {
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink);
}

.scope-item-title {
  font-size: 15px;
  line-height: 1.5;
  margin-bottom: 4px;
}

.scope-col-figure .scope-figure {
  margin: 0;
}

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

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

.exclusion-item-title {
  font-size: 15px;
  line-height: 1.4;
  margin-bottom: 6px;
}

.exclusion-item p {
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink-soft);
}

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

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

.maintain-item-title {
  font-size: 15px;
  line-height: 1.4;
  margin-bottom: 8px;
}

.maintain-item p {
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.maintain-hint {
  margin-top: 18px;
  font-size: 13px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.maintain-hint a {
  color: var(--brick);
  border-bottom: 1px solid transparent;
}

.maintain-hint a:hover {
  border-bottom-color: var(--brick);
}

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

/* 404 */
.error-main {
  max-width: var(--container);
  margin: 0 auto;
  padding: 64px var(--pad) 96px;
}

.error-inner {
  max-width: 640px;
}

.error-code {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--brick);
  margin-bottom: 12px;
}

.error-title {
  font-size: clamp(26px, 3vw, 34px);
  line-height: 1.3;
}

.error-lead {
  margin-top: 12px;
  color: var(--ink-soft);
  line-height: 1.8;
}

.error-reasons {
  display: grid;
  gap: 8px;
  margin-top: 20px;
  padding-left: 0;
}

.error-reasons li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.error-reasons li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--brick);
  font-family: var(--font-mono);
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.error-links {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.error-links-title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  margin-bottom: 12px;
}

.error-links ul {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
}

.error-links a {
  font-size: 14px;
  color: var(--ink-green);
  border-bottom: 1px solid var(--line);
  padding-bottom: 2px;
}

.error-links a:hover {
  border-bottom-color: var(--brick);
}

/* responsive */
@media (max-width: 1023px) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    display: block;
    padding: 0 var(--pad);
    background-color: var(--card);
    border-bottom: 1px solid var(--line);
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 0 12px;
  }

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

  .nav-list li {
    border-bottom: 1px solid var(--line);
  }

  .nav-list li:last-child {
    border-bottom: 0;
  }

  .nav-link {
    display: flex;
    align-items: center;
    min-height: 44px;
    padding: 10px 0;
    border-bottom: 0;
  }

  .nav-link.is-current {
    border-bottom: 0;
    color: var(--brick);
  }

  .header-inner {
    position: relative;
  }

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

  .hero-visual {
    max-width: 560px;
  }

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

  .entry-cell {
    padding: 20px 18px 20px 0;
    border-bottom: 1px solid var(--line);
  }

  .entry-cell:nth-child(2n) {
    border-right: 0;
    padding-right: 0;
    padding-left: 18px;
  }

  .entry-cell:nth-last-child(-n + 2) {
    border-bottom: 0;
  }

  .scope-body {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }

  .scope-figure {
    max-width: 520px;
  }

  .sync-layout {
    flex-direction: column;
    gap: 20px;
  }

  .sync-index {
    position: static;
    flex: 1 1 auto;
    width: 100%;
  }

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

  .latest-row {
    grid-template-columns: 44px minmax(0, 1fr) auto;
    gap: 6px 12px;
  }

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

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

  .latest-row .row-link {
    grid-column: 3 / 4;
    grid-row: 2;
    justify-self: end;
  }

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

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

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

  .flow-step:nth-child(2n) {
    border-right: 0;
  }

  .flow-step:nth-last-child(-n + 2) {
    border-bottom: 0;
  }

  .page-layout,
  .sidebar-left .page-layout,
  .page-layout.sidebar-left {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }

  .channel-aside {
    position: static;
  }

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

  .group-head {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
  }

  .group-figure {
    max-width: 420px;
  }

  .order-note {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
  }

  .update-legend {
    max-width: 480px;
  }

  .step-list,
  .sequence-columns,
  .display-list,
  .maintain-body,
  .next-list,
  .next-link-list,
  .next-link-grid,
  .section-next .next-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .scope-columns {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }

  .scope-col-figure .scope-figure {
    max-width: 480px;
  }

  .footer-mid {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }
}

@media (max-width: 719px) {
  :root {
    --pad: 16px;
  }

  body {
    font-size: 16px;
  }

  .brand-name {
    font-size: 15px;
  }

  .inner-main {
    padding-bottom: 56px;
  }

  .home-main {
    padding-bottom: 56px;
  }

  .hero {
    padding: 28px 0 26px;
  }

  .hero h1 {
    max-width: none;
  }

  .hero-actions {
    gap: 12px;
  }

  .hero-figure img {
    height: 190px;
  }

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

  .entry-cell,
  .entry-cell + .entry-cell,
  .entry-cell:nth-child(2n) {
    padding: 18px 0;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .entry-cell:last-child {
    border-bottom: 0;
  }

  .entry-cell:nth-last-child(-n + 2) {
    border-bottom: 1px solid var(--line);
  }

  .entry-cell:last-child {
    border-bottom: 0;
  }

  .scope-section,
  .channel-sync,
  .latest-list,
  .flow-faq {
    padding: 32px 0;
  }

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

  .sync-group {
    padding: 18px 16px;
  }

  .latest-row {
    grid-template-columns: 40px minmax(0, 1fr);
    gap: 4px 10px;
    padding: 12px 0;
  }

  .latest-row .tag {
    grid-column: 2 / 3;
    justify-self: start;
  }

  .latest-note {
    grid-column: 1 / -1;
  }

  .latest-status {
    grid-column: 1 / 2;
    grid-row: auto;
  }

  .latest-row .row-link {
    grid-column: 2 / 3;
    grid-row: auto;
    justify-self: start;
  }

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

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

  .flow-step {
    border-right: 0;
    border-bottom: 1px solid var(--line);
    padding: 16px;
  }

  .flow-step:nth-last-child(-n + 2) {
    border-bottom: 1px solid var(--line);
  }

  .flow-step:last-child {
    border-bottom: 0;
  }

  .boundary-note {
    padding: 18px 16px;
  }

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

  .channel-group {
    padding: 18px 16px;
  }

  .entry-row {
    grid-template-columns: 40px minmax(0, 1fr);
    gap: 4px 10px;
  }

  .entry-row .entry-tag {
    grid-column: 2 / 3;
    justify-self: start;
  }

  .entry-note {
    grid-column: 1 / -1;
  }

  .step-list,
  .sequence-columns,
  .display-list,
  .maintain-body,
  .next-list,
  .next-link-list,
  .next-link-grid,
  .section-next .next-links,
  .collection-grid,
  .feedback-list,
  .exclusion-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .capacity-bar {
    padding: 16px;
  }

  .verify-item {
    grid-template-columns: 40px minmax(0, 1fr);
    gap: 10px;
  }

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

  .misconception-row .misconception-cell:first-child {
    border-right: 0;
    border-bottom: 1px solid var(--line);
    padding-bottom: 6px;
  }

  .misconception-row .misconception-cell:last-child {
    padding-top: 6px;
  }

  .misconception-head .misconception-cell:first-child {
    border-bottom: 1px solid var(--line);
  }

  .tag-table th,
  .tag-table td {
    display: block;
    width: 100%;
    padding-right: 0;
  }

  .tag-table th {
    padding-bottom: 2px;
    border-bottom: 0;
  }

  .tag-table td {
    padding-top: 0;
  }

  .section,
  .flow-strip,
  .step-details,
  .faq-list,
  .display-note,
  .verify-section,
  .feedback-section,
  .misconception-section {
    padding-top: 26px;
  }

  .section-figure img,
  .latest-figure img,
  .verify-figure img,
  .step-figure img {
    height: 190px;
  }

  .footer-top {
    padding: 24px 0 20px;
  }

  .footer-mid {
    padding: 22px 0;
  }

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

  .footer-bottom {
    padding: 16px 0 22px;
  }

  .error-main {
    padding: 48px var(--pad) 64px;
  }

  .error-actions .btn {
    flex: 1 1 auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}