:root {
  --ink: #141a1f;
  --ink-2: #2b3740;
  --paper: #f4f6f7;
  --surface: #ffffff;
  --line: #d7dde1;
  --line-strong: #b9c3ca;
  --steel: #5c7382;
  --steel-deep: #243642;
  --accent: #c56a34;
  --accent-soft: #f0e2d8;
  --muted: #6b7c86;
  --radius: 6px;
  --shell: 1200px;
  --gutter: 24px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC",
    Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
    "Liberation Mono", monospace;
  --shadow-sm: 0 1px 2px rgba(20, 26, 31, 0.06);
  --shadow-md: 0 6px 18px rgba(20, 26, 31, 0.08);
}

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

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  font-variant-numeric: tabular-nums;
  -webkit-font-smoothing: antialiased;
}

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

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

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

p {
  margin: 0 0 12px;
}

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

h1,
h2,
h3,
h4 {
  margin: 0 0 10px;
  color: var(--ink);
  font-weight: 700;
  line-height: 1.35;
}

h2 {
  font-size: 26px;
}

h3 {
  font-size: 18px;
}

h4 {
  font-size: 16px;
}

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

button {
  font: inherit;
  color: inherit;
}

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

.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: flex;
  flex-direction: column;
  min-height: 100vh;
  background: var(--paper);
  color: var(--ink);
}

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

.brandbar-inner,
.main-nav-inner,
.footer-inner {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

.site-main {
  flex: 1 1 auto;
  display: block;
}

.inner-main {
  padding-top: 24px;
  padding-bottom: 64px;
}

.inner-main > * {
  max-width: var(--shell);
  margin-left: auto;
  margin-right: auto;
}

.inner-main > .page-layout,
.inner-main > .page-header,
.inner-main > .breadcrumb,
.inner-main > .page-title,
.inner-main > .page-title-block,
.inner-main > .page-title + .page-title {
  padding-left: 0;
  padding-right: 0;
}

/* ============================================================
   components — header / nav
   ============================================================ */

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

.brandbar-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  padding-top: 14px;
  padding-bottom: 14px;
}

.brand {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 12px;
  min-height: 44px;
  padding: 6px 0;
}

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

.brand-tagline {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.5;
}

.quick-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px 18px;
  font-size: 13px;
}

.quick-links a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 2px;
  color: var(--steel);
  border-bottom: 1px solid transparent;
}

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

.quick-links a.is-current {
  color: var(--steel-deep);
  font-weight: 600;
  border-bottom-color: var(--accent);
}

.main-nav {
  background: var(--surface);
}

.main-nav-inner {
  position: relative;
  display: flex;
  align-items: center;
  padding-top: 0;
  padding-bottom: 0;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  width: 100%;
  min-height: 48px;
  padding: 10px 0;
  background: none;
  border: 0;
  cursor: pointer;
  text-align: left;
}

.nav-toggle-bar {
  position: relative;
  flex: 0 0 auto;
  width: 20px;
  height: 2px;
  background: var(--steel-deep);
}

.nav-toggle-bar::before,
.nav-toggle-bar::after {
  content: "";
  position: absolute;
  left: 0;
  width: 20px;
  height: 2px;
  background: var(--steel-deep);
}

.nav-toggle-bar::before {
  top: -6px;
}

.nav-toggle-bar::after {
  top: 6px;
}

.nav-toggle-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--steel-deep);
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  gap: 0 4px;
  width: 100%;
}

.nav-list li {
  display: flex;
}

.nav-list a {
  display: inline-flex;
  align-items: center;
  min-height: 48px;
  padding: 0 14px;
  font-size: 15px;
  color: var(--ink-2);
  border-bottom: 2px solid transparent;
}

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

.nav-list a.is-current {
  color: var(--steel-deep);
  font-weight: 600;
  border-bottom-color: var(--accent);
  background: var(--paper);
}

/* ============================================================
   components — breadcrumb / page title
   ============================================================ */

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

.breadcrumb a {
  color: var(--steel);
  min-height: 24px;
}

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

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

.breadcrumb-current {
  color: var(--ink-2);
  font-weight: 600;
}

.page-header {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 8px var(--gutter) 0;
}

.page-title {
  margin: 0;
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  line-height: 1.25;
  color: var(--ink);
}

.page-title-block,
.page-title + .page-title {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 12px var(--gutter) 0;
}

.section-kicker,
.section-index,
.section-eyebrow,
.section-num,
.section-label {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

.page-lead,
.page-overview,
.page-title-lead {
  max-width: 72ch;
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-2);
}

/* ============================================================
   components — section head
   ============================================================ */

.section-head {
  margin-bottom: 24px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.section-head h2 {
  margin: 0 0 8px;
}

.section-head-text h2 {
  margin: 0 0 8px;
}

.section-desc {
  max-width: 72ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--muted);
}

.section-title {
  margin: 0 0 8px;
  font-size: 24px;
}

.section-footnote {
  margin: 20px 0 0;
  font-size: 14px;
  color: var(--muted);
}

.section-footnote a {
  margin-right: 16px;
  color: var(--steel-deep);
  border-bottom: 1px solid var(--line-strong);
}

.section-footnote a:hover,
.section-footnote a:focus-visible {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* ============================================================
   components — buttons
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.2;
  cursor: pointer;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.btn-primary {
  background: var(--steel-deep);
  color: #fff;
  border-color: var(--steel-deep);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.btn-ghost {
  background: transparent;
  color: var(--steel-deep);
  border-color: var(--line-strong);
}

.btn-ghost:hover,
.btn-ghost:focus-visible {
  color: var(--accent);
  border-color: var(--accent);
}

/* ============================================================
   components — figures / media
   ============================================================ */

figure {
  margin: 0;
}

.hero-media,
.brief-media,
.flow-media,
.lead-figure,
.scene-figure,
.media-figure,
.media-item,
.section-media,
.aside-figure {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.hero-media img,
.brief-media img,
.flow-media img,
.lead-figure img,
.scene-figure img,
.media-figure img,
.media-item img,
.section-media img,
.aside-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  background: var(--line);
}

.hero-media figcaption,
.brief-media figcaption,
.flow-media figcaption,
.lead-figure figcaption,
.scene-figure figcaption,
.media-figure figcaption,
.media-item figcaption,
.section-media figcaption,
.aside-figure figcaption {
  padding: 10px 14px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

/* ============================================================
   components — tables
   ============================================================ */

.table-wrap {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.param-table,
.data-table,
.checkpoint-table {
  width: 100%;
  min-width: 520px;
  font-size: 15px;
}

.param-table th,
.param-table td,
.data-table th,
.data-table td,
.checkpoint-table th,
.checkpoint-table td {
  padding: 12px 16px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
  line-height: 1.7;
}

.param-table thead th,
.data-table thead th,
.checkpoint-table thead th {
  background: var(--paper);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--steel-deep);
  white-space: nowrap;
}

.param-table tbody th,
.data-table tbody th,
.checkpoint-table tbody th {
  width: 22%;
  min-width: 130px;
  font-weight: 600;
  color: var(--ink);
  background: #fbfcfc;
}

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

.param-table td,
.data-table td,
.checkpoint-table td {
  color: var(--ink-2);
}

/* ============================================================
   components — faq (details/summary)
   ============================================================ */

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

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

.faq-item summary {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  min-height: 52px;
  padding: 14px 16px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
}

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

.faq-item summary::before {
  content: "＋";
  flex: 0 0 auto;
  font-size: 15px;
  font-weight: 700;
  color: var(--accent);
  line-height: 1.6;
}

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

.faq-item summary:hover,
.faq-item summary:focus-visible {
  color: var(--accent);
}

.faq-answer,
.faq-body {
  padding: 0 16px 16px 42px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-2);
}

.faq-answer p:last-child,
.faq-body p:last-child {
  margin-bottom: 0;
}

.faq-more {
  margin: 16px 0 0;
  font-size: 14px;
}

.faq-more a {
  color: var(--steel-deep);
  border-bottom: 1px solid var(--line-strong);
}

.faq-more a:hover,
.faq-more a:focus-visible {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* ============================================================
   components — footer
   ============================================================ */

.site-footer {
  background: var(--steel-deep);
  color: #c8d3d9;
  font-size: 14px;
}

.footer-inner {
  display: grid;
  grid-template-columns: minmax(240px, 1.4fr) repeat(3, minmax(140px, 1fr));
  gap: 32px 40px;
  padding-top: 44px;
  padding-bottom: 32px;
}

.footer-brand-name {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 700;
  color: #fff;
}

.footer-brand-desc {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: #a9b8c0;
}

.footer-col-title {
  margin: 0 0 12px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: #fff;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.footer-col a {
  display: flex;
  align-items: center;
  min-height: 40px;
  font-size: 14px;
  color: #c8d3d9;
  border-bottom: 1px solid transparent;
}

.footer-col a:hover,
.footer-col a:focus-visible {
  color: #fff;
  border-bottom-color: var(--accent);
}

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

.footer-copy,
.footer-note {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 16px var(--gutter);
  font-size: 13px;
  line-height: 1.7;
  color: #9dafb8;
}

.footer-copy {
  padding-bottom: 4px;
}

.footer-note {
  padding-top: 4px;
  padding-bottom: 24px;
}

/* ============================================================
   pages — index
   ============================================================ */

.home-main {
  padding-bottom: 64px;
}

.home-main > section {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 48px var(--gutter) 0;
}

.home-main > section:first-child {
  padding-top: 36px;
}

/* hero */
.hero {
  padding-bottom: 8px;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 40px;
  align-items: start;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--line);
}

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

.eyebrow {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

.hero-copy h1 {
  margin: 0 0 16px;
  font-size: clamp(28px, 3.6vw, 42px);
  font-weight: 700;
  line-height: 1.25;
}

.hero-lead {
  max-width: 60ch;
  margin: 0 0 24px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-2);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 28px;
}

.hero-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 24px;
  margin: 0;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

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

.hero-fact dt {
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.hero-fact dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
}

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

.hero-media img {
  aspect-ratio: 4 / 3;
}

/* entry panel */
.entry-columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px 32px;
}

.entry-col {
  min-width: 0;
  padding-top: 18px;
  border-top: 2px solid var(--steel-deep);
}

.entry-col-title {
  margin: 0 0 14px;
  font-size: 17px;
}

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

.entry-item {
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.entry-item:first-child {
  padding-top: 0;
}

.entry-item a {
  display: inline-block;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--steel-deep);
}

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

.entry-note {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

/* capability brief */
.capability-list {
  display: flex;
  flex-direction: column;
}

.capability-brief .capability-item {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr) minmax(0, 1.2fr);
  gap: 8px 24px;
  align-items: start;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.capability-brief .capability-num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--accent);
}

.capability-brief .capability-name {
  margin: 0;
  font-size: 18px;
}

.capability-brief .capability-meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px 20px;
  margin: 0;
}

.capability-brief .capability-meta dt {
  margin-bottom: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.capability-brief .capability-meta dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink-2);
}

.brief-media {
  margin-top: 28px;
}

.brief-media img {
  aspect-ratio: 21 / 9;
}

/* flow */
.flow-steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.flow-step {
  min-width: 0;
  padding: 18px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  border-top: 3px solid var(--accent);
}

.flow-num {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--accent);
}

.flow-name {
  margin: 0 0 12px;
  font-size: 17px;
}

.flow-meta {
  margin: 0 0 8px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-2);
}

.flow-meta:last-child {
  margin-bottom: 0;
}

.flow-label {
  display: block;
  margin-bottom: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.flow-media {
  margin-top: 28px;
}

.flow-media img {
  aspect-ratio: 21 / 9;
}

/* insights pick */
.insight-list {
  display: flex;
  flex-direction: column;
}

.insight-item {
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.insight-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.insight-num {
  color: var(--accent);
  font-weight: 700;
}

.insight-tag {
  padding: 2px 8px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--steel);
}

.insight-title {
  margin: 0 0 8px;
  font-size: 18px;
}

.insight-title a {
  color: var(--steel-deep);
}

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

.insight-body {
  max-width: 76ch;
  margin: 0 0 8px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-2);
}

.insight-link-note {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

/* archive preview */
.archive-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px 40px;
}

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

.archive-col-title {
  margin: 0 0 12px;
  padding-bottom: 10px;
  font-size: 17px;
  border-bottom: 1px solid var(--line);
}

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

.check-row {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) auto;
  gap: 4px 12px;
  align-items: baseline;
  padding: 10px 0;
  border-bottom: 1px dashed var(--line);
  font-size: 15px;
}

.check-num {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--accent);
}

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

.check-stage {
  font-size: 13px;
  color: var(--muted);
  white-space: nowrap;
}

.archive-more {
  margin: 14px 0 0;
  font-size: 14px;
}

.archive-more a {
  color: var(--steel-deep);
  border-bottom: 1px solid var(--line-strong);
}

.archive-more a:hover,
.archive-more a:focus-visible {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* start here */
.start-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px 40px;
}

.start-col {
  min-width: 0;
  padding: 20px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 3px solid var(--steel-deep);
  border-radius: var(--radius);
}

.start-col-title {
  margin: 0 0 10px;
  font-size: 17px;
}

.start-col p {
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-2);
}

.start-link {
  margin: 12px 0 0;
  font-size: 14px;
}

.start-link a {
  color: var(--steel-deep);
  border-bottom: 1px solid var(--line-strong);
}

.start-link a:hover,
.start-link a:focus-visible {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* ============================================================
   pages — shared inner layout
   ============================================================ */

.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  max-width: var(--shell);
  margin: 32px auto 0;
  padding: 0 var(--gutter);
  align-items: start;
}

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

.page-layout > .content-column,
.page-layout > .archive-content,
.page-layout > .main-column {
  min-width: 0;
}

.page-layout > .capability-index,
.page-layout > .archive-nav,
.page-layout > .side-column {
  min-width: 0;
}

/* ============================================================
   pages — capability
   ============================================================ */

.capability-index,
.archive-nav,
.side-column {
  position: sticky;
  top: 24px;
  padding: 20px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.aside-title {
  margin: 0 0 12px;
  padding-bottom: 10px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--steel-deep);
  border-bottom: 1px solid var(--line);
}

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

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

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

.index-list a {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 6px 0;
  font-size: 15px;
  color: var(--ink-2);
}

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

.index-num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
}

.page-toc {
  margin-bottom: 28px;
  padding: 16px 20px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.toc-list {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 20px;
}

.toc-list a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  font-size: 14px;
  color: var(--steel-deep);
  border-bottom: 1px solid transparent;
}

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

.capability-blocks {
  margin-bottom: 40px;
}

.capability-blocks .capability-item {
  display: block;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

.capability-item-head {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 4px 16px;
  align-items: baseline;
  margin-bottom: 14px;
}

.capability-item-head h3 {
  margin: 0;
  font-size: 20px;
}

.capability-fit {
  grid-column: 2 / -1;
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

.capability-blocks .capability-meta {
  display: grid;
  grid-template-columns: 140px minmax(0, 1fr);
  gap: 10px 20px;
  margin: 0 0 12px;
  padding: 16px 20px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.capability-blocks .capability-meta dt {
  font-size: 13px;
  font-weight: 600;
  color: var(--steel);
}

.capability-blocks .capability-meta dd {
  margin: 0;
  min-width: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-2);
}

.capability-note {
  max-width: 76ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-2);
}

.capability-blocks .media-figure {
  margin-top: 18px;
}

.capability-blocks .media-figure img {
  aspect-ratio: 16 / 9;
}

.param-section,
.exception-section {
  margin-bottom: 40px;
}

.exception-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.exception-item {
  min-width: 0;
  padding: 18px 20px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
}

.exception-item h3 {
  margin: 0 0 10px;
  font-size: 17px;
}

.exception-signal,
.exception-handle {
  margin: 0 0 8px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-2);
}

.exception-handle {
  margin-bottom: 0;
  color: var(--muted);
}

/* ============================================================
   pages — insights
   ============================================================ */

.page-insights .lead-figure {
  max-width: var(--shell);
  margin: 24px auto 0;
  padding: 0 var(--gutter);
  border: 0;
  background: none;
}

.page-insights .lead-figure img {
  aspect-ratio: 21 / 9;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.page-insights .lead-figure figcaption {
  padding: 10px 0 0;
  border-top: 0;
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  max-width: var(--shell);
  margin: 28px auto 0;
  padding: 0 var(--gutter);
}

.filter-btn {
  min-height: 44px;
  padding: 0 18px;
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  color: var(--steel-deep);
  cursor: pointer;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.filter-btn:hover,
.filter-btn:focus-visible {
  color: var(--accent);
  border-color: var(--accent);
}

.filter-btn.is-active {
  background: var(--steel-deep);
  border-color: var(--steel-deep);
  color: #fff;
}

.insight-section {
  max-width: var(--shell);
  margin: 40px auto 0;
  padding: 0 var(--gutter);
}

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

.insight-section .entry-item {
  padding: 0;
  border-bottom: 1px solid var(--line);
}

.entry {
  padding: 20px 0;
}

.entry-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.entry-no {
  color: var(--accent);
  font-weight: 700;
}

.entry-title {
  margin: 0 0 8px;
  font-size: 18px;
  line-height: 1.5;
}

.entry-body {
  max-width: 76ch;
  margin: 0 0 8px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-2);
}

.entry-link-note {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

.entry-link-note a {
  color: var(--steel-deep);
  border-bottom: 1px solid var(--line-strong);
}

.entry-link-note a:hover,
.entry-link-note a:focus-visible {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.trend-group {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.trend-item {
  min-width: 0;
  padding: 20px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-top: 3px solid var(--steel-deep);
  border-radius: var(--radius);
}

.trend-title {
  margin: 0 0 10px;
  font-size: 17px;
}

.trend-body {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-2);
}

.trend-scope {
  margin: 0;
  padding-top: 10px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
  border-top: 1px dashed var(--line);
}

.note-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.note-item {
  min-width: 0;
  padding: 18px 20px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.note-title {
  margin: 0 0 8px;
  font-size: 16px;
}

.note-body {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-2);
}

/* ============================================================
   pages — cases
   ============================================================ */

.method-intro,
.scene-list,
.checkpoint-section,
.related-entry {
  max-width: var(--shell);
  margin: 40px auto 0;
  padding: 0 var(--gutter);
}

.method-intro {
  margin-top: 32px;
}

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

.method-item {
  min-width: 0;
  padding: 18px 20px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.method-item h3 {
  margin: 0 0 8px;
  font-size: 16px;
  color: var(--steel-deep);
}

.method-item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-2);
}

.scene-figure {
  margin-top: 24px;
}

.scene-figure img {
  aspect-ratio: 21 / 9;
}

.scene-item {
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

.scene-name {
  margin: 0 0 16px;
  font-size: 20px;
}

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

.scene-block {
  min-width: 0;
  padding-left: 16px;
  border-left: 2px solid var(--line-strong);
}

.scene-block h4 {
  margin: 0 0 8px;
  font-size: 15px;
  color: var(--accent);
}

.scene-block p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-2);
}

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

.related-list li {
  min-width: 0;
  padding: 16px 18px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.related-list a {
  display: inline-block;
  font-size: 16px;
  font-weight: 600;
  color: var(--steel-deep);
}

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

.related-list p {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

/* ============================================================
   pages — archive
   ============================================================ */

.archive-nav-list {
  display: flex;
  flex-direction: column;
  margin-bottom: 16px;
}

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

.archive-nav-list a {
  display: flex;
  align-items: center;
  min-height: 44px;
  font-size: 15px;
  color: var(--ink-2);
}

.archive-nav-list a:hover,
.archive-nav-list a:focus-visible {
  color: var(--accent);
}

.aside-figure img {
  aspect-ratio: 4 / 3;
}

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

.archive-usage {
  margin-bottom: 8px;
}

.usage-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.usage-list li {
  min-width: 0;
  padding: 18px 20px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.usage-list h3 {
  margin: 0 0 8px;
  font-size: 16px;
}

.usage-list p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-2);
}

.usage-links {
  margin: 20px 0 0;
  font-size: 14px;
}

.usage-links a {
  margin-right: 16px;
  color: var(--steel-deep);
  border-bottom: 1px solid var(--line-strong);
}

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

/* ============================================================
   pages — cooperation
   ============================================================ */

.stage-overview,
.stage-detail,
.stage-media,
.materials,
.scope-change,
.next-step {
  max-width: var(--shell);
  margin: 40px auto 0;
  padding: 0 var(--gutter);
}

.stage-overview {
  margin-top: 32px;
}

.stage-strip {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 10px;
  margin-top: 16px;
}

.stage-strip li {
  min-width: 0;
}

.stage-strip a {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-height: 64px;
  padding: 12px 14px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-top: 3px solid var(--steel-deep);
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--ink-2);
  transition: border-color 0.18s ease, color 0.18s ease;
}

.stage-strip a:hover,
.stage-strip a:focus-visible {
  color: var(--accent);
  border-color: var(--accent);
}

.stage-no {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
}

.stage-name {
  font-weight: 600;
  line-height: 1.5;
}

.stage-item {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 8px 20px;
  align-items: start;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

.stage-item-no {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--accent);
}

.stage-item-body {
  min-width: 0;
}

.stage-item-title {
  margin: 0 0 8px;
  font-size: 20px;
}

.stage-item-desc {
  max-width: 76ch;
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-2);
}

.stage-fields {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 10px 20px;
  margin: 0;
  padding: 16px 20px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.stage-fields dt {
  font-size: 13px;
  font-weight: 600;
  color: var(--steel);
}

.stage-fields dd {
  margin: 0;
  min-width: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-2);
}

.media-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  margin-top: 16px;
}

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

.media-item img {
  aspect-ratio: 16 / 9;
}

.scope-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.scope-item {
  min-width: 0;
  padding: 18px 20px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
}

.scope-item h3 {
  margin: 0 0 8px;
  font-size: 16px;
}

.scope-item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-2);
}

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

.next-step-list li {
  min-width: 0;
}

.next-step-list a {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-height: 72px;
  padding: 16px 18px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.18s ease;
}

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

.next-step-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--steel-deep);
}

.next-step-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

/* ============================================================
   pages — support
   ============================================================ */

.faq-category-nav {
  max-width: var(--shell);
  margin: 32px auto 0;
  padding: 0 var(--gutter);
}

.category-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.category-link {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 8px 14px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-top: 3px solid var(--steel-deep);
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  color: var(--steel-deep);
  text-align: center;
  transition: border-color 0.18s ease, color 0.18s ease;
}

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

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

.page-support .main-column {
  min-width: 0;
}

.page-support .side-column {
  position: sticky;
  top: 24px;
  padding: 0;
  background: none;
  border: 0;
}

.side-block {
  margin-bottom: 20px;
  padding: 18px 20px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.side-block-title {
  margin: 0 0 10px;
  padding-bottom: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--steel-deep);
  border-bottom: 1px solid var(--line);
}

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

.side-list li {
  min-width: 0;
}

.side-list a {
  display: flex;
  align-items: center;
  min-height: 40px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink-2);
  border-bottom: 1px solid var(--line);
}

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

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

.side-list-arrow a::after {
  content: "→";
  margin-left: auto;
  padding-left: 8px;
  color: var(--line-strong);
}

.side-list-plain a {
  color: var(--muted);
}

.side-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.faq-group {
  margin-bottom: 40px;
}

.faq-group .checklist {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.check-item {
  min-width: 0;
  padding: 16px 18px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.check-item h3 {
  margin: 0 0 8px;
  font-size: 16px;
}

.check-item p {
  margin: 0 0 8px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-2);
}

.check-result {
  margin: 0;
  padding-top: 8px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--steel);
  border-top: 1px dashed var(--line);
}

.faq-group .section-media {
  margin-bottom: 24px;
}

.faq-group .section-media img {
  aspect-ratio: 21 / 9;
}

.service-path {
  max-width: var(--shell);
  margin: 8px auto 0;
  padding: 0 var(--gutter);
}

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

.path-item {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 8px 20px;
  align-items: start;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.path-index {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--accent);
}

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

.path-body h3 {
  margin: 0 0 8px;
  font-size: 18px;
}

.path-body p {
  max-width: 76ch;
  margin: 0 0 8px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-2);
}

.path-link {
  margin: 0;
  font-size: 14px;
}

.path-link a {
  color: var(--steel-deep);
  border-bottom: 1px solid var(--line-strong);
}

.path-link a:hover,
.path-link a:focus-visible {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.path-note {
  margin: 20px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

/* ============================================================
   pages — 404
   ============================================================ */

.error-main {
  padding-bottom: 64px;
}

.error-intro,
.error-paths {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 48px var(--gutter) 0;
}

.error-intro {
  padding-top: 56px;
}

.error-intro h1 {
  margin: 0 0 16px;
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1.25;
}

.error-lead {
  max-width: 64ch;
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-2);
}

.error-code {
  margin: 0 0 24px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

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

.error-paths h2 {
  margin: 0 0 16px;
  font-size: 22px;
}

.error-path-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.error-path-list li {
  min-width: 0;
}

.error-path-list a {
  display: flex;
  align-items: center;
  min-height: 60px;
  padding: 14px 18px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 3px solid var(--steel-deep);
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  color: var(--steel-deep);
  transition: border-color 0.18s ease, color 0.18s ease;
}

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

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

@media (max-width: 1024px) {
  .footer-inner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-layout.sidebar-left > .capability-index,
  .page-layout.sidebar-left > .archive-nav {
    position: static;
    top: auto;
  }

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

  .page-support .side-column {
    position: static;
    top: auto;
  }

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

  .capability-brief .capability-item {
    grid-template-columns: 56px minmax(0, 1fr);
  }

  .capability-brief .capability-item .capability-name {
    grid-column: 2 / -1;
  }

  .capability-brief .capability-item .capability-meta {
    grid-column: 2 / -1;
  }

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

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

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

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

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

@media (max-width: 768px) {
  .brandbar-inner {
    padding-top: 10px;
    padding-bottom: 10px;
  }

  .brand-tagline {
    display: none;
  }

  .quick-links {
    gap: 2px 14px;
  }

  .nav-toggle {
    display: flex;
  }

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

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

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

  .nav-list a {
    display: flex;
    width: 100%;
    min-height: 48px;
    padding: 0 4px;
    border-bottom: 0;
    border-left: 3px solid transparent;
  }

  .nav-list a.is-current {
    background: var(--paper);
    border-left-color: var(--accent);
  }

  .home-main > section {
    padding-top: 36px;
  }

  .hero-inner {
    padding-bottom: 28px;
  }

  .hero-actions .btn {
    flex: 1 1 160px;
  }

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

  .entry-columns,
  .archive-columns,
  .start-columns,
  .media-grid,
  .flow-steps,
  .method-grid,
  .scene-body,
  .stage-strip,
  .category-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .capability-brief .capability-item,
  .capability-blocks .capability-item {
    grid-template-columns: minmax(0, 1fr);
  }

  .capability-brief .capability-item .capability-name,
  .capability-brief .capability-item .capability-meta {
    grid-column: auto;
  }

  .capability-blocks .capability-meta,
  .stage-fields {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px 0;
  }

  .capability-blocks .capability-meta dd,
  .stage-fields dd {
    margin-bottom: 10px;
  }

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

  .capability-fit {
    grid-column: auto;
  }

  .stage-item,
  .path-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
  }

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

  .check-stage {
    grid-column: 2 / -1;
    white-space: normal;
  }

  .page-layout {
    margin-top: 24px;
  }

  .page-layout.sidebar-left > .capability-index,
  .page-layout.sidebar-left > .archive-nav {
    padding: 14px 16px;
  }

  .index-list,
  .archive-nav-list {
    flex-direction: row;
    flex-wrap: nowrap;
    gap: 8px;
    overflow-x: auto;
    margin-bottom: 0;
    padding-bottom: 4px;
  }

  .index-list li,
  .archive-nav-list li {
    flex: 0 0 auto;
    border-bottom: 0;
  }

  .index-list a,
  .archive-nav-list a {
    min-height: 40px;
    padding: 6px 14px;
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    white-space: nowrap;
  }

  .aside-figure {
    display: none;
  }

  .stage-strip {
    display: flex;
    flex-wrap: nowrap;
    gap: 10px;
    overflow-x: auto;
    padding-bottom: 6px;
  }

  .stage-strip li {
    flex: 0 0 auto;
  }

  .stage-strip a {
    min-width: 120px;
  }

  .category-list {
    display: flex;
    flex-wrap: nowrap;
    gap: 10px;
    overflow-x: auto;
    padding-bottom: 6px;
  }

  .category-list li {
    flex: 0 0 auto;
  }

  .category-link {
    min-width: 132px;
    white-space: nowrap;
  }

  .filter-bar {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 6px;
  }

  .filter-btn {
    flex: 0 0 auto;
    white-space: nowrap;
  }

  .table-wrap {
    border-radius: var(--radius);
  }

  .param-table,
  .data-table,
  .checkpoint-table {
    min-width: 0;
  }

  .param-table thead,
  .data-table thead,
  .checkpoint-table thead {
    display: none;
  }

  .param-table tr,
  .data-table tr,
  .checkpoint-table tr {
    display: block;
    padding: 14px 16px;
    border-bottom: 1px solid var(--line);
  }

  .param-table tbody tr:last-child,
  .data-table tbody tr:last-child,
  .checkpoint-table tbody tr:last-child {
    border-bottom: 0;
  }

  .param-table th,
  .param-table td,
  .data-table th,
  .data-table td,
  .checkpoint-table th,
  .checkpoint-table td {
    display: block;
    width: auto;
    min-width: 0;
    padding: 4px 0;
    border-bottom: 0;
    background: none;
    white-space: normal;
  }

  .param-table tbody th,
  .data-table tbody th,
  .checkpoint-table tbody th {
    font-size: 13px;
    letter-spacing: 0.04em;
    color: var(--steel);
  }

  .faq-answer,
  .faq-body {
    padding-left: 16px;
  }

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
    padding-top: 32px;
  }

  .error-intro,
  .error-paths {
    padding-top: 32px;
  }
}

@media (max-width: 480px) {
  .hero-actions .btn {
    flex: 1 1 100%;
  }

  .insight-meta,
  .entry-meta {
    gap: 8px;
  }

  .section-head h2 {
    font-size: 22px;
  }
}