:root {
  --canvas: #f7f7f5;
  --surface: #ffffff;
  --ink: #23262b;
  --ink-soft: #6b7075;
  --line: #e2e2df;
  --accent: #b23a5b;
  --accent-soft: #f6e9ee;
  --radius: 6px;
  --shell: 1120px;
  --gutter: 24px;
}

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

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

body.site-body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", sans-serif;
  font-size: 16px;
  line-height: 1.8;
  font-weight: 400;
}

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

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

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

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

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.3;
  font-weight: 600;
}

p {
  margin: 0;
}

figure {
  margin: 0;
}

dl,
dt,
dd {
  margin: 0;
}

button {
  font: inherit;
  color: inherit;
}

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

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

.fact-bar {
  background: #efefec;
  border-bottom: 1px solid var(--line);
}

.fact-bar-text {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 8px var(--gutter);
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink-soft);
}

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

.header-inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 14px var(--gutter);
  display: flex;
  align-items: center;
  gap: 24px;
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-right: auto;
  min-width: 0;
}

.brand-name {
  font-size: 19px;
  font-weight: 600;
  line-height: 1.3;
}

.brand-slogan {
  font-size: 12px;
  line-height: 1.5;
  color: var(--ink-soft);
}

.site-nav {
  flex: 0 1 auto;
}

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

.nav-item {
  display: block;
}

.nav-link {
  display: block;
  padding: 8px 12px;
  font-size: 15px;
  line-height: 1.5;
  color: var(--ink-soft);
  border-bottom: 2px solid transparent;
  border-radius: var(--radius) var(--radius) 0 0;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--ink);
  background: #f2f2ef;
}

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

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

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

.site-main {
  display: block;
}

.home-main,
.inner-main {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.site-footer {
  margin-top: 72px;
  background: var(--surface);
  border-top: 1px solid var(--line);
}

.footer-inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 48px var(--gutter) 32px;
  display: grid;
  grid-template-columns: minmax(240px, 1.6fr) repeat(4, minmax(120px, 1fr));
  gap: 32px 28px;
}

.footer-about {
  min-width: 0;
}

.footer-brand {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 10px;
}

.footer-desc {
  font-size: 13px;
  line-height: 1.8;
  color: var(--ink-soft);
}

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

.footer-group-title {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 12px;
}

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

.footer-list a {
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

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

.footer-bottom {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 16px var(--gutter) 28px;
  border-top: 1px solid var(--line);
}

.footer-copy {
  font-size: 12px;
  line-height: 1.7;
  color: var(--ink-soft);
}

/* ============ components ============ */

.section {
  padding: 56px 0 8px;
}

.section-head {
  margin-bottom: 28px;
  max-width: 760px;
}

.section-title {
  font-size: 24px;
  margin-bottom: 10px;
}

.section-desc,
.section-lead {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.section-lead {
  max-width: 760px;
  margin-bottom: 24px;
}

.text-link {
  display: inline-block;
  font-size: 14px;
  color: var(--accent);
  border-bottom: 1px solid var(--accent);
  padding-bottom: 2px;
}

.text-link:hover,
.text-link:focus-visible {
  color: var(--ink);
  border-bottom-color: var(--ink);
}

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

.btn-primary {
  background: var(--accent);
  color: #ffffff;
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: #93304c;
  color: #ffffff;
}

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

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

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 20px 0 0;
  font-size: 13px;
  color: var(--ink-soft);
}

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

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

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

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

.page-header {
  padding: 20px 0 36px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 8px;
}

.page-title {
  font-size: 30px;
  margin-bottom: 12px;
}

.page-description {
  max-width: 760px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

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

.faq-question {
  padding: 16px 0;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
}

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

.faq-question::after {
  content: "+";
  float: right;
  color: var(--accent);
  font-weight: 400;
}

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

.faq-answer {
  padding: 0 0 18px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.faq-answer a {
  color: var(--accent);
  border-bottom: 1px solid var(--accent);
}

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

.hero {
  padding: 40px 0 8px;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(300px, 0.85fr);
  gap: 40px;
  align-items: start;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--line);
}

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

.hero-eyebrow {
  font-size: 13px;
  line-height: 1.6;
  color: var(--accent);
  margin-bottom: 14px;
}

.hero-title {
  font-size: 34px;
  margin-bottom: 16px;
}

.hero-desc {
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: 620px;
  margin-bottom: 24px;
}

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

.hero-panel {
  min-width: 0;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
}

.hero-panel-title {
  font-size: 17px;
  margin-bottom: 8px;
}

.hero-panel-desc {
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
  margin-bottom: 18px;
}

.use-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

.use-btn {
  min-height: 44px;
  padding: 8px 16px;
  font-size: 14px;
  background: var(--canvas);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  cursor: pointer;
}

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

.use-btn.is-active {
  background: var(--accent);
  border-color: var(--accent);
  color: #ffffff;
}

.use-hint-list li + li {
  margin-top: 8px;
}

.use-hint {
  font-size: 13px;
  line-height: 1.8;
  color: var(--ink-soft);
  padding-left: 14px;
  position: relative;
}

.use-hint::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 6px;
  height: 1px;
  background: var(--accent);
}

.hero-media {
  margin-top: 32px;
}

.hero-media img {
  width: 100%;
  aspect-ratio: 16 / 7;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

.hero-media-caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

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

.record-row {
  display: grid;
  grid-template-columns: 108px 140px minmax(0, 1fr);
  gap: 20px;
  align-items: baseline;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.record-date {
  font-size: 13px;
  color: var(--ink-soft);
}

.record-scope {
  font-size: 13px;
  color: var(--accent);
}

.record-text {
  font-size: 15px;
  line-height: 1.8;
  min-width: 0;
}

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

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

.channel-row {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr) minmax(0, 1.5fr) auto;
  gap: 20px;
  align-items: center;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.channel-no {
  font-size: 13px;
  color: var(--ink-soft);
}

.channel-name {
  font-size: 17px;
  min-width: 0;
}

.channel-scope {
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
  min-width: 0;
}

.channel-enter,
.channel-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 16px;
  font-size: 14px;
  color: var(--accent);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  white-space: nowrap;
}

.channel-enter:hover,
.channel-enter:focus-visible,
.channel-link:hover,
.channel-link:focus-visible {
  background: var(--accent);
  border-color: var(--accent);
  color: #ffffff;
}

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

.collection-card,
.collection-item {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

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

.collection-media img,
.collection-figure img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.collection-card .collection-name,
.collection-item .collection-name {
  font-size: 17px;
  padding: 18px 20px 0;
}

.collection-line,
.collection-clue {
  font-size: 14px;
  line-height: 1.8;
  color: var(--accent);
  padding: 8px 20px 0;
}

.collection-desc {
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
  padding: 8px 20px 0;
}

.collection-enter,
.collection-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  margin: 16px 20px 20px;
  font-size: 14px;
  color: var(--accent);
  border-bottom: 1px solid var(--accent);
  align-self: flex-start;
}

.collection-enter:hover,
.collection-enter:focus-visible,
.collection-link:hover,
.collection-link:focus-visible {
  color: var(--ink);
  border-bottom-color: var(--ink);
}

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

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

.flow-no {
  display: block;
  font-size: 13px;
  color: var(--accent);
  margin-bottom: 10px;
}

.flow-name {
  font-size: 16px;
  margin-bottom: 10px;
}

.flow-desc {
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
  margin-bottom: 12px;
}

.flow-check {
  font-size: 13px;
  line-height: 1.8;
  color: var(--ink);
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

.flow-more {
  margin-top: 20px;
}

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

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

.field-col-title {
  font-size: 17px;
  margin-bottom: 14px;
}

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

.field-key {
  font-size: 14px;
  font-weight: 600;
  padding-top: 12px;
}

.field-value {
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

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

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

.boundary-item {
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

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

.site-index-item {
  min-width: 0;
}

.site-index-link {
  display: flex;
  flex-direction: column;
  gap: 6px;
  height: 100%;
  min-height: 44px;
  padding: 18px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

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

.site-index-name {
  font-size: 15px;
  font-weight: 600;
}

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

/* ============ pages: channel ============ */

.channel-overview .channel-row {
  grid-template-columns: 64px minmax(0, 1fr) auto;
  align-items: start;
}

.channel-main {
  min-width: 0;
}

.channel-main .channel-name {
  margin-bottom: 6px;
}

.channel-block {
  display: grid;
  grid-template-columns: minmax(220px, 320px) minmax(0, 1fr);
  gap: 28px;
  align-items: start;
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
}

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

.channel-figure img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

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

.channel-title {
  font-size: 19px;
  margin-bottom: 12px;
}

.channel-text {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
  margin-bottom: 16px;
}

.channel-feature-list {
  display: grid;
  gap: 8px;
}

.channel-feature {
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink);
  padding-left: 14px;
  position: relative;
}

.channel-feature::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 6px;
  height: 1px;
  background: var(--accent);
}

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

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

.advice-title {
  font-size: 16px;
  margin-bottom: 10px;
}

.advice-text {
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.section-foot {
  margin-top: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}

.section-foot a {
  font-size: 14px;
  color: var(--accent);
  border-bottom: 1px solid var(--accent);
  padding-bottom: 2px;
}

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

/* ============ pages: collection ============ */

.collection-item .collection-name {
  padding: 18px 20px 0;
}

.collection-item .collection-clue {
  padding: 8px 20px 0;
}

.collection-item .collection-desc {
  padding: 8px 20px 0;
}

.order-block {
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.order-title {
  font-size: 17px;
  margin-bottom: 10px;
}

.order-text {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: 760px;
}

/* ============ pages: browse ============ */

.browse-steps,
.browse-checkpoints,
.browse-faq {
  padding: 56px 0 8px;
}

.browse-figure {
  margin-bottom: 28px;
}

.browse-figure img {
  width: 100%;
  aspect-ratio: 16 / 6;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

.browse-figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

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

.step-item {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 8px 24px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.step-index {
  grid-row: span 3;
  font-size: 13px;
  color: var(--accent);
}

.step-name {
  font-size: 17px;
}

.step-desc {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
  min-width: 0;
}

.step-desc a {
  color: var(--accent);
  border-bottom: 1px solid var(--accent);
}

.step-result {
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink);
}

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

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

.checkpoint-title {
  font-size: 15px;
  margin-bottom: 12px;
}

.checkpoint-list {
  display: grid;
  gap: 8px;
}

.checkpoint-list li {
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
  padding-left: 14px;
  position: relative;
}

.checkpoint-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 6px;
  height: 1px;
  background: var(--accent);
}

/* ============ pages: field ============ */

.field-figure {
  margin: 28px 0 0;
}

.field-figure img {
  width: 100%;
  aspect-ratio: 16 / 6;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

.field-figure-caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.field-section {
  padding: 56px 0 8px;
}

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

.field-item {
  display: grid;
  grid-template-columns: minmax(120px, 200px) minmax(0, 1fr);
  gap: 8px 24px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.field-name {
  font-size: 15px;
  font-weight: 600;
}

.field-desc {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
  min-width: 0;
}

.field-desc a {
  color: var(--accent);
  border-bottom: 1px solid var(--accent);
}

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

.boundary-column {
  min-width: 0;
}

.subsection-title {
  font-size: 16px;
  margin-bottom: 14px;
}

.boundary-included .subsection-title {
  color: var(--ink);
}

.boundary-excluded .subsection-title {
  color: var(--ink-soft);
}

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

.boundary-list li {
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.boundary-note {
  margin-top: 20px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.boundary-note a {
  color: var(--accent);
  border-bottom: 1px solid var(--accent);
}

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

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

.error-main {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.error-panel {
  padding: 72px 0 24px;
  max-width: 640px;
}

.error-title {
  font-size: 30px;
  margin-bottom: 14px;
}

.error-desc {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
  margin-bottom: 28px;
}

.error-entry-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 28px;
}

.error-entry-item {
  min-width: 0;
}

.error-entry-link {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 12px 16px;
  font-size: 14px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

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

.error-home-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 10px 20px;
  font-size: 15px;
  background: var(--accent);
  color: #ffffff;
  border-radius: var(--radius);
}

.error-home-link:hover,
.error-home-link:focus-visible {
  background: #93304c;
  color: #ffffff;
}

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

@media (max-width: 960px) {
  .header-inner {
    flex-wrap: wrap;
    gap: 12px;
  }

  .nav-toggle {
    display: flex;
    margin-left: auto;
  }

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

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 0 4px;
    border-top: 1px solid var(--line);
  }

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

  .nav-link {
    padding: 12px 8px;
    border-bottom: 1px solid var(--line);
    border-radius: 0;
  }

  .nav-link.is-current {
    border-bottom-color: var(--line);
    background: var(--accent-soft);
  }

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

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

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

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

  .footer-about {
    grid-column: 1 / -1;
  }
}

@media (max-width: 720px) {
  :root {
    --gutter: 16px;
  }

  .hero {
    padding-top: 24px;
  }

  .hero-title {
    font-size: 26px;
  }

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

  .section,
  .browse-steps,
  .browse-checkpoints,
  .browse-faq,
  .field-section {
    padding-top: 40px;
  }

  .section-title {
    font-size: 20px;
  }

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

  .channel-row,
  .channel-overview .channel-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
    align-items: start;
  }

  .channel-enter,
  .channel-link {
    justify-self: start;
  }

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

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

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

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

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

  .step-index {
    grid-row: auto;
  }

  .field-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }

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

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
    padding-top: 36px;
  }

  .footer-about {
    grid-column: auto;
  }
}

@media (max-width: 420px) {
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .btn {
    width: 100%;
  }

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

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