:root {
  color-scheme: light;
  --page: #ffffff;
  --ink: #0b1b37;
  --ink-soft: #334765;
  --muted: #64748b;
  --blue: #0d5ff0;
  --blue-strong: #084cc9;
  --blue-soft: #eef6ff;
  --workspace: #f6f9fd;
  --line: #cfdced;
  --line-soft: #e7eef7;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 14px;
  --shadow-soft: 0 16px 45px rgba(15, 52, 96, 0.08);
  --container: 1180px;
  --font:
    Inter, "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic", Meiryo,
    system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 112px;
}

body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.72;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input {
  font: inherit;
}

img,
svg {
  display: block;
}

h1,
h2,
h3,
p,
ol,
ul {
  margin-top: 0;
}

h1,
h2,
h3 {
  letter-spacing: -0.025em;
  line-height: 1.3;
  text-wrap: balance;
}

.container {
  width: min(calc(100% - 48px), var(--container));
  margin-inline: auto;
}

.sr-only,
.skip-link:not(:focus) {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  border-radius: var(--radius-sm);
  background: var(--ink);
  color: #fff;
  padding: 10px 14px;
}

.site-header {
  position: sticky;
  z-index: 50;
  top: 0;
  border-bottom: 1px solid var(--line-soft);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(16px);
}

.header-inner {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.support-brand {
  display: inline-flex;
  align-items: center;
  gap: 13px;
  flex: 0 0 auto;
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0;
}

.support-brand img {
  width: 119px;
  height: auto;
}

.support-brand span {
  padding-left: 13px;
  border-left: 1px solid var(--line);
  white-space: nowrap;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 34px;
  color: var(--ink-soft);
  font-size: 13px;
  font-weight: 750;
}

.header-nav > a:not(.header-action) {
  position: relative;
  padding-block: 8px;
}

.header-nav > a:not(.header-action)::after {
  position: absolute;
  right: 0;
  bottom: 2px;
  left: 0;
  height: 2px;
  content: "";
  background: var(--blue);
  transform: scaleX(0);
  transition: transform 160ms ease;
}

.header-nav > a:hover::after,
.header-nav > a:focus-visible::after {
  transform: scaleX(1);
}

.header-action {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--blue);
  border-radius: var(--radius-sm);
  padding: 9px 16px;
  color: var(--blue);
  transition:
    background 150ms ease,
    color 150ms ease;
}

.header-action:hover,
.header-action:focus-visible {
  background: var(--blue);
  color: #fff;
}

.external-icon,
.inline-icon {
  width: 17px;
  height: 17px;
  flex: 0 0 auto;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.menu-button {
  display: none;
}

.support-hero {
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(90deg, rgba(13, 95, 240, 0.035) 1px, transparent 1px),
    linear-gradient(rgba(13, 95, 240, 0.035) 1px, transparent 1px),
    linear-gradient(115deg, #fff 55%, #f7faff 100%);
  background-size:
    42px 42px,
    42px 42px,
    auto;
}

.hero-layout {
  min-height: 570px;
  display: grid;
  grid-template-columns: minmax(0, 1.06fr) minmax(420px, 0.94fr);
  align-items: center;
  gap: 40px;
  padding-block: 72px 66px;
}

.hero-copy {
  max-width: 600px;
}

.hero-copy h1 {
  margin-bottom: 28px;
  font-size: clamp(46px, 4.3vw, 62px);
  font-weight: 820;
  letter-spacing: -0.045em;
  line-height: 1.16;
}

.hero-copy p {
  max-width: 560px;
  margin-bottom: 34px;
  color: var(--ink-soft);
  font-size: 17px;
  line-height: 1.9;
}

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

.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  gap: 9px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 750;
  line-height: 1.3;
  transition:
    background 150ms ease,
    border-color 150ms ease,
    box-shadow 150ms ease,
    transform 150ms ease;
}

.button-primary {
  background: var(--blue);
  color: #fff;
  box-shadow: 0 12px 24px rgba(13, 95, 240, 0.2);
}

.button-primary:hover,
.button-primary:focus-visible {
  background: var(--blue-strong);
  box-shadow: 0 14px 30px rgba(13, 95, 240, 0.27);
  transform: translateY(-1px);
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--blue);
  font-size: 14px;
  font-weight: 750;
}

.text-link:hover .inline-icon {
  transform: translateX(3px);
}

.guidance-illustration {
  width: min(100%, 560px);
  margin-left: auto;
}

.start-band {
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, #f9fbff 0%, #f5f9fe 100%);
  padding-block: 54px 62px;
}

.section-title {
  margin-bottom: 38px;
  font-size: 30px;
  font-weight: 800;
  text-align: center;
}

.section-title::after {
  display: block;
  width: 30px;
  height: 3px;
  margin: 15px auto 0;
  content: "";
  background: var(--blue);
}

.journey-list {
  display: grid;
  margin: 0;
  padding: 0;
  grid-template-columns: repeat(3, 1fr);
  list-style: none;
}

.journey-list li {
  position: relative;
  display: grid;
  justify-items: center;
  padding-inline: 34px;
  text-align: center;
}

.journey-list li:not(:last-child)::after {
  position: absolute;
  z-index: 0;
  top: 73px;
  right: -20%;
  width: 40%;
  border-top: 2px dashed #9fc0f5;
  content: "";
}

.journey-number {
  position: relative;
  z-index: 2;
  display: grid;
  width: 28px;
  height: 28px;
  place-items: center;
  border-radius: 50%;
  margin-bottom: 15px;
  background: var(--blue);
  color: #fff;
  font-size: 12px;
  font-weight: 800;
}

.journey-icon,
.path-icon {
  position: relative;
  z-index: 1;
  display: grid;
  width: 78px;
  height: 78px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  margin-bottom: 19px;
  background: #fff;
  box-shadow: 0 10px 24px rgba(23, 66, 117, 0.07);
  color: var(--ink);
}

.journey-icon svg,
.path-icon svg {
  width: 35px;
  height: 35px;
}

.journey-list strong {
  margin-bottom: 8px;
  font-size: 16px;
}

.journey-list p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.8;
}

.section {
  padding-block: 70px;
}

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

.category-row {
  display: grid;
  min-height: 102px;
  align-items: center;
  gap: 28px;
  border-bottom: 1px solid var(--line);
  padding: 18px 18px 18px 26px;
  grid-template-columns: 52px minmax(0, 1fr) 24px;
  transition:
    background 150ms ease,
    padding 150ms ease;
}

.category-row:hover,
.category-row:focus-visible {
  background: var(--blue-soft);
  padding-right: 12px;
}

.category-row-icon,
.article-row-icon {
  color: var(--ink);
}

.category-row-icon svg {
  width: 38px;
  height: 38px;
}

.category-row strong,
.article-row strong {
  display: block;
  margin-bottom: 3px;
  font-size: 17px;
}

.category-row small,
.article-row small {
  display: block;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.65;
}

.chevron {
  width: 21px;
  height: 21px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.popular-band {
  border-top: 1px solid var(--line-soft);
  background: var(--workspace);
  padding-block: 60px 54px;
}

.popular-list {
  display: grid;
  gap: 0 58px;
  margin: 0 0 52px;
  padding: 0;
  grid-template-columns: repeat(2, 1fr);
  list-style: none;
}

.popular-list a {
  display: grid;
  min-height: 64px;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid var(--line);
  padding: 10px 4px;
  grid-template-columns: 24px 22px minmax(0, 1fr) 20px;
  font-size: 14px;
  font-weight: 730;
}

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

.popular-number {
  color: var(--blue);
  font-size: 18px;
  font-weight: 820;
}

.popular-list svg:not(.chevron) {
  width: 20px;
  height: 20px;
  color: var(--muted);
}

.contact-band {
  display: grid;
  min-height: 144px;
  align-items: center;
  gap: 26px;
  border: 1px solid var(--blue);
  border-radius: var(--radius-sm);
  padding: 24px 30px;
  grid-template-columns: 150px minmax(0, 1fr) auto;
  background: #fff;
}

.contact-illustration {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--blue);
}

.contact-illustration svg {
  width: 120px;
  height: 82px;
}

.contact-band h2 {
  margin-bottom: 6px;
  font-size: 24px;
}

.contact-band p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.contact-band .button {
  min-width: 300px;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: #fff;
  padding-block: 28px;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}

.footer-brand img {
  width: 102px;
}

.footer-inner small {
  display: block;
  margin-top: 7px;
  color: var(--muted);
  font-size: 10px;
}

.footer-inner nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 26px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 650;
}

.footer-inner nav a {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.footer-inner nav a:hover {
  color: var(--blue);
}

.footer-inner .external-icon {
  width: 13px;
  height: 13px;
}

.breadcrumbs {
  padding-block: 30px 12px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 650;
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumbs li:not(:last-child)::after {
  margin-left: 9px;
  content: ">";
  color: #9aaac1;
}

.breadcrumbs a:hover {
  color: var(--blue);
}

.category-hero {
  display: flex;
  align-items: center;
  gap: 36px;
  padding-block: 58px 42px;
}

.category-hero-icon {
  flex: 0 0 auto;
}

.category-hero-icon svg {
  width: 72px;
  height: 72px;
  stroke-width: 1.4;
}

.category-hero h1 {
  margin-bottom: 10px;
  font-size: 48px;
}

.category-hero p {
  max-width: 760px;
  margin-bottom: 0;
  color: var(--ink-soft);
  font-size: 16px;
}

.recommended-path {
  border: 1px solid #abc9f6;
  border-radius: var(--radius-md);
  padding: 24px 32px 28px;
  background: linear-gradient(145deg, #fff 0%, #f6faff 100%);
}

.recommended-path h2 {
  margin-bottom: 24px;
  font-size: 22px;
}

.recommended-path ol {
  display: grid;
  margin: 0;
  padding: 0;
  grid-template-columns: repeat(4, 1fr);
  list-style: none;
}

.recommended-path li {
  position: relative;
  display: grid;
  justify-items: center;
  gap: 8px;
  text-align: center;
}

.recommended-path li:not(:last-child)::after {
  position: absolute;
  top: 53px;
  right: -17%;
  width: 34%;
  border-top: 2px dashed #91b7ef;
  content: "";
}

.path-number {
  display: grid;
  width: 24px;
  height: 24px;
  place-items: center;
  border-radius: 50%;
  background: var(--blue);
  color: #fff;
  font-size: 11px;
  font-weight: 800;
}

.path-icon {
  width: 66px;
  height: 66px;
  margin: 0;
}

.path-icon svg {
  width: 29px;
  height: 29px;
}

.recommended-path strong {
  font-size: 14px;
}

.category-articles {
  padding-block: 62px 28px;
}

.category-articles > h2 {
  margin-bottom: 34px;
  font-size: 30px;
}

.article-group {
  margin-bottom: 38px;
}

.article-group h3 {
  margin-bottom: 8px;
  font-size: 19px;
}

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

.article-row {
  display: grid;
  min-height: 86px;
  align-items: center;
  gap: 22px;
  border-bottom: 1px solid var(--line);
  padding: 15px 18px;
  grid-template-columns: 38px minmax(0, 1fr) 22px;
  transition: background 150ms ease;
}

.article-row:hover,
.article-row:focus-visible {
  background: var(--blue-soft);
}

.article-row-icon svg {
  width: 30px;
  height: 30px;
}

.category-checklist {
  border: 1px solid #b8d0f3;
  border-radius: var(--radius-md);
  margin: 20px 0 34px;
  padding: 24px 30px 30px;
  background: linear-gradient(135deg, #fff, #f4f9ff);
}

.category-checklist h2 {
  margin-bottom: 24px;
  font-size: 22px;
}

.category-checklist ul {
  display: grid;
  margin: 0;
  padding: 0;
  grid-template-columns: repeat(3, 1fr);
  list-style: none;
}

.category-checklist .checklist-columns-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.category-checklist .checklist-columns-5 {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.category-checklist li {
  display: flex;
  min-height: 72px;
  align-items: center;
  justify-content: center;
  gap: 13px;
  padding-inline: 24px;
  text-align: center;
  font-size: 13px;
  font-weight: 700;
}

.category-checklist li:not(:last-child) {
  border-right: 1px solid var(--line);
}

.category-checklist svg {
  width: 28px;
  height: 28px;
  flex: 0 0 auto;
  fill: none;
  stroke: var(--blue);
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.category-page .contact-band {
  margin-bottom: 48px;
}

.article-layout {
  display: grid;
  align-items: start;
  gap: 42px;
  padding: 20px 0 64px;
  grid-template-columns: 205px minmax(0, 1fr);
}

.article-toc {
  position: sticky;
  top: 112px;
  border-left: 1px solid var(--line);
  padding: 4px 0 4px 16px;
}

.article-toc > strong {
  display: block;
  margin-bottom: 12px;
  font-size: 14px;
}

.article-toc nav {
  display: grid;
  gap: 3px;
}

.article-toc a {
  position: relative;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 8px 10px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 650;
  line-height: 1.5;
}

.article-toc a:hover,
.article-toc a.is-active {
  background: var(--blue-soft);
  color: var(--blue);
}

.article-toc a.is-active::before {
  position: absolute;
  top: 0;
  bottom: 0;
  left: -17px;
  width: 2px;
  content: "";
  background: var(--blue);
}

.support-article {
  min-width: 0;
  max-width: 880px;
}

.article-header {
  border-bottom: 1px solid var(--line);
  margin-bottom: 30px;
  padding-bottom: 28px;
}

.article-header h1 {
  margin-bottom: 14px;
  font-size: clamp(34px, 4vw, 48px);
}

.article-header p {
  max-width: 760px;
  margin-bottom: 10px;
  color: var(--ink-soft);
  font-size: 16px;
}

.article-header small {
  color: var(--muted);
  font-size: 11px;
}

.mobile-toc {
  display: none;
}

.article-intro-notice {
  margin-bottom: 28px;
}

.article-section {
  padding-block: 8px 35px;
}

.article-section + .article-section {
  border-top: 1px solid var(--line-soft);
  padding-top: 34px;
}

.article-section h2 {
  margin-bottom: 18px;
  font-size: 25px;
}

.article-copy {
  color: var(--ink-soft);
  font-size: 15px;
}

.article-copy h3 {
  margin: 24px 0 9px;
  color: var(--ink);
  font-size: 18px;
}

.article-copy p {
  margin-bottom: 16px;
}

.article-copy ul,
.article-copy ol {
  margin: 0 0 20px;
  padding-left: 1.45em;
}

.article-copy li {
  margin-block: 7px;
  padding-left: 4px;
}

.article-copy strong {
  color: var(--ink);
}

.article-copy code {
  border: 1px solid var(--line-soft);
  border-radius: 5px;
  padding: 2px 6px;
  background: var(--workspace);
  color: #0d468f;
  font-family: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.9em;
  word-break: break-word;
}

.article-copy pre {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 15px 18px;
  background: #f7f9fc;
  color: var(--ink);
  font-size: 13px;
}

.article-copy table {
  width: 100%;
  border-collapse: collapse;
  margin-block: 18px;
  font-size: 13px;
}

.article-copy th,
.article-copy td {
  border: 1px solid var(--line);
  padding: 11px 13px;
  text-align: left;
  vertical-align: top;
}

.article-copy th {
  background: var(--workspace);
  color: var(--ink);
}

.notice-box {
  display: grid;
  gap: 13px;
  border: 1px solid #9fc2fa;
  border-radius: var(--radius-sm);
  margin: 22px 0;
  padding: 16px 18px;
  grid-template-columns: 22px minmax(0, 1fr);
  background: #f2f7ff;
  color: var(--ink-soft);
  font-size: 13px;
}

.notice-box > svg {
  width: 20px;
  height: 20px;
  margin-top: 2px;
  fill: none;
  stroke: var(--blue);
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.notice-box strong {
  display: block;
  margin-bottom: 3px;
  color: var(--ink);
  font-size: 14px;
}

.notice-box p {
  margin: 0;
}

.notice-warning {
  border-color: #f0c779;
  background: #fff9ed;
}

.notice-warning > svg {
  stroke: #c17700;
}

.article-image {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  margin: 25px 0 6px;
  background: var(--workspace);
  box-shadow: var(--shadow-soft);
}

.article-image img {
  width: 100%;
  height: auto;
}

.article-image figcaption {
  border-top: 1px solid var(--line);
  padding: 9px 14px;
  background: #fff;
  color: var(--muted);
  font-size: 11px;
  text-align: center;
}

.article-pager {
  display: grid;
  gap: 18px;
  border-block: 1px solid var(--line);
  margin-top: 16px;
  padding-block: 18px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.article-pager a {
  display: flex;
  min-height: 60px;
  flex-direction: column;
  justify-content: center;
  border-radius: var(--radius-sm);
  padding: 8px 12px;
}

.article-pager a:hover {
  background: var(--blue-soft);
  color: var(--blue);
}

.article-pager small {
  margin-bottom: 3px;
  color: var(--muted);
  font-size: 10px;
}

.article-pager strong {
  font-size: 13px;
}

.pager-next {
  text-align: right;
}

.related-articles {
  padding-block: 34px 24px;
}

.related-articles h2 {
  margin-bottom: 14px;
  font-size: 21px;
}

.related-articles > div {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.related-articles a {
  display: grid;
  min-height: 60px;
  align-items: center;
  gap: 8px;
  border-bottom: 1px solid var(--line);
  padding: 10px 4px;
  grid-template-columns: 20px minmax(0, 1fr) 17px;
  color: var(--blue);
  font-size: 11px;
  font-weight: 700;
}

.related-articles a > svg:not(.chevron) {
  width: 18px;
  height: 18px;
}

.article-page .contact-band {
  min-height: 124px;
  margin-top: 8px;
  padding: 20px 26px;
  grid-template-columns: 120px minmax(0, 1fr) auto;
}

.article-page .contact-band h2 {
  font-size: 22px;
}

.article-page .contact-band .button {
  min-width: 270px;
}

.not-found {
  display: grid;
  min-height: 65vh;
  place-items: center;
  text-align: center;
}

.not-found .container {
  display: grid;
  justify-items: center;
}

.not-found svg {
  width: 68px;
  height: 68px;
  margin-bottom: 18px;
}

.not-found h1 {
  margin-bottom: 10px;
  font-size: 40px;
}

.not-found p {
  margin-bottom: 26px;
  color: var(--muted);
}

:focus-visible {
  outline: 3px solid rgba(13, 95, 240, 0.3);
  outline-offset: 3px;
}

@media (max-width: 980px) {
  .header-nav {
    gap: 20px;
  }

  .hero-layout {
    grid-template-columns: 1fr 0.9fr;
    gap: 30px;
  }

  .contact-band,
  .article-page .contact-band {
    grid-template-columns: 110px 1fr;
  }

  .contact-band .button,
  .article-page .contact-band .button {
    width: fit-content;
    min-width: 0;
    grid-column: 2;
  }

  .article-layout {
    gap: 28px;
    grid-template-columns: 170px minmax(0, 1fr);
  }

  .category-checklist ul,
  .category-checklist .checklist-columns-4,
  .category-checklist .checklist-columns-5 {
    grid-template-columns: 1fr;
  }

  .category-checklist li {
    justify-content: flex-start;
    padding: 15px 0;
    text-align: left;
  }

  .category-checklist li:not(:last-child) {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }
}

@media (max-width: 760px) {
  html {
    scroll-padding-top: 84px;
  }

  body {
    font-size: 15px;
  }

  .container {
    width: min(calc(100% - 32px), var(--container));
  }

  .header-inner {
    min-height: 64px;
  }

  .support-brand {
    gap: 10px;
    font-size: 12px;
  }

  .support-brand img {
    width: 102px;
  }

  .support-brand span {
    padding-left: 10px;
  }

  .menu-button {
    display: grid;
    width: 42px;
    height: 42px;
    place-items: center;
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    background: #fff;
    color: var(--ink);
  }

  .menu-button svg {
    width: 24px;
    height: 24px;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.8;
    stroke-linecap: round;
  }

  .header-nav {
    position: absolute;
    top: 64px;
    right: 0;
    left: 0;
    display: none;
    align-items: stretch;
    gap: 4px;
    border-bottom: 1px solid var(--line);
    padding: 12px 16px 18px;
    background: #fff;
    box-shadow: var(--shadow-soft);
    flex-direction: column;
  }

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

  .header-nav a {
    min-height: 44px;
    display: flex;
    align-items: center;
    padding: 9px 12px;
  }

  .header-action {
    justify-content: center;
    margin-top: 4px;
  }

  .support-hero {
    background-size:
      34px 34px,
      34px 34px,
      auto;
  }

  .hero-layout {
    min-height: auto;
    gap: 24px;
    padding-block: 52px 40px;
    grid-template-columns: 1fr;
  }

  .hero-copy h1 {
    margin-bottom: 20px;
    font-size: clamp(40px, 12vw, 56px);
  }

  .hero-copy p {
    margin-bottom: 25px;
    font-size: 15px;
  }

  .guidance-illustration {
    width: 100%;
    max-height: 240px;
  }

  .start-band {
    padding-block: 44px;
  }

  .section-title {
    margin-bottom: 28px;
    font-size: 25px;
  }

  .journey-list {
    gap: 28px;
    grid-template-columns: 1fr;
  }

  .journey-list li {
    grid-template-columns: 32px 62px minmax(0, 1fr);
    justify-items: start;
    gap: 2px 14px;
    padding: 0;
    text-align: left;
  }

  .journey-list li::after {
    display: none;
  }

  .journey-number {
    align-self: center;
    grid-row: 1 / span 2;
    margin: 0;
  }

  .journey-icon {
    width: 58px;
    height: 58px;
    align-self: center;
    grid-row: 1 / span 2;
    margin: 0;
  }

  .journey-icon svg {
    width: 27px;
    height: 27px;
  }

  .journey-list strong,
  .journey-list p {
    grid-column: 3;
  }

  .section {
    padding-block: 50px;
  }

  .category-row {
    min-height: 88px;
    gap: 16px;
    padding: 14px 4px;
    grid-template-columns: 38px minmax(0, 1fr) 20px;
  }

  .category-row-icon svg {
    width: 30px;
    height: 30px;
  }

  .category-row strong {
    font-size: 15px;
  }

  .category-row small {
    font-size: 12px;
  }

  .popular-list {
    grid-template-columns: 1fr;
  }

  .contact-band,
  .article-page .contact-band {
    gap: 14px;
    padding: 22px;
    grid-template-columns: 1fr;
  }

  .contact-illustration {
    display: none;
  }

  .contact-band .button,
  .article-page .contact-band .button {
    width: 100%;
    grid-column: 1;
  }

  .contact-band h2 {
    font-size: 21px;
  }

  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .footer-inner nav {
    justify-content: flex-start;
    gap: 12px 20px;
  }

  .breadcrumbs {
    padding-block: 20px 8px;
    font-size: 10px;
  }

  .category-hero {
    align-items: flex-start;
    gap: 18px;
    padding-block: 34px 30px;
  }

  .category-hero-icon svg {
    width: 48px;
    height: 48px;
  }

  .category-hero h1 {
    font-size: 36px;
  }

  .category-hero p {
    font-size: 14px;
  }

  .recommended-path {
    padding: 20px;
  }

  .recommended-path ol {
    gap: 22px;
    grid-template-columns: repeat(2, 1fr);
  }

  .recommended-path li::after {
    display: none;
  }

  .category-articles {
    padding-top: 48px;
  }

  .category-articles > h2 {
    font-size: 26px;
  }

  .article-row {
    min-height: 82px;
    gap: 14px;
    padding-inline: 6px;
    grid-template-columns: 30px minmax(0, 1fr) 18px;
  }

  .article-row-icon svg {
    width: 24px;
    height: 24px;
  }

  .article-row strong {
    font-size: 14px;
  }

  .article-row small {
    font-size: 11px;
  }

  .article-layout {
    padding-top: 8px;
    grid-template-columns: 1fr;
  }

  .article-toc {
    display: none;
  }

  .article-header {
    margin-bottom: 16px;
    padding-bottom: 22px;
  }

  .article-header h1 {
    font-size: 32px;
  }

  .article-header p {
    font-size: 14px;
  }

  .mobile-toc {
    display: block;
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    margin-bottom: 24px;
    padding: 16px;
    background: #fff;
  }

  .mobile-toc > strong {
    font-size: 15px;
  }

  .mobile-toc ol {
    margin: 8px 0 0;
    padding-left: 1.35em;
    color: var(--blue);
    font-size: 12px;
    font-weight: 700;
  }

  .mobile-toc li {
    margin-block: 5px;
    padding-left: 4px;
  }

  .article-section {
    padding-bottom: 26px;
  }

  .article-section + .article-section {
    padding-top: 28px;
  }

  .article-section h2 {
    font-size: 21px;
  }

  .article-copy {
    font-size: 14px;
  }

  .article-copy table,
  .article-copy tbody,
  .article-copy tr,
  .article-copy th,
  .article-copy td {
    display: block;
  }

  .article-copy thead {
    display: none;
  }

  .article-copy tr {
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    margin-bottom: 10px;
    overflow: hidden;
  }

  .article-copy th,
  .article-copy td {
    border: 0;
    border-bottom: 1px solid var(--line-soft);
  }

  .article-copy tr > :last-child {
    border-bottom: 0;
  }

  .article-image {
    margin-inline: 0;
  }

  .article-pager {
    grid-template-columns: 1fr;
  }

  .pager-next {
    border-top: 1px solid var(--line-soft);
    text-align: left;
  }

  .related-articles > div {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 430px) {
  .hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .hero-actions .button,
  .hero-actions .text-link {
    justify-content: center;
  }

  .guidance-illustration {
    max-height: 190px;
  }

  .recommended-path ol {
    grid-template-columns: 1fr;
  }

  .recommended-path li {
    grid-template-columns: 36px 56px 1fr;
    align-items: center;
    justify-items: start;
    text-align: left;
  }

  .path-icon {
    width: 52px;
    height: 52px;
  }

  .category-checklist {
    padding: 20px;
  }

  .article-header h1 {
    font-size: 29px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}