:root {
  --blog-reading: 820px;
  --blog-gutter: max(1.5rem, var(--gutter));
  --blog-list-title: clamp(2rem, 4vw, 3rem);
  --blog-article-title: clamp(1.85rem, 3.6vw, 2.6rem);
  --blog-section-title: clamp(1.3rem, 2.2vw, 1.6rem);
  --blog-subtitle: 1.3rem;
  --blog-body-size: 1rem;
  --blog-small-size: 0.875rem;
  --blog-reading-leading: 1.9;
  --blog-title-leading: 1.4;
  --blog-title-spacing: -0.015em;
  --blog-modal-time: 180ms;
  --blog-focus-width: 3px;
}

/* 动态文章卡保持可见，不依赖显形观察器。 */
.blog-card-grid,
.related-grid,
.stat-grid,
#post-nav {
  display: grid;
  gap: 1.25rem;
}

.blog-card-grid > *,
.related-grid > *,
.stat-grid > *,
#post-nav > * {
  min-width: 0;
}

.blog-index main,
.blog-article main {
  color: var(--amp-ink);
  font-family: var(--font-body);
}

.blog-index h1,
.blog-index h2,
.blog-index h3,
.article-hero h1,
.prose h1,
.prose h2,
.prose h3,
.article-body h2,
.article-body h3,
[data-article-body] h2,
[data-article-body] h3,
#related-posts h2,
#related-posts h3,
.promo-block h2,
.blog-signup-dialog h2 {
  display: block;
  font-family: var(--font-display);
  font-weight: var(--weight-display);
  letter-spacing: var(--blog-title-spacing);
  text-wrap: pretty;
  overflow-wrap: anywhere;
}

.blog-skip {
  position: fixed;
  inset-block-start: 0.75rem;
  inset-inline-start: 1rem;
  z-index: 1000;
  padding: 0.75rem 1.25rem;
  border-radius: var(--r-pill);
  background: var(--amp-panel);
  color: var(--amp-navy);
  box-shadow: var(--lift-sm);
  transform: translateY(-200%);
}

.blog-skip:focus {
  transform: translateY(0);
}

.blog-index a:focus-visible,
.blog-index button:focus-visible,
.reading-wrap a:focus-visible,
.article-hero a:focus-visible,
.breadcrumbs a:focus-visible,
.blog-signup-dialog a:focus-visible,
.blog-signup-dialog button:focus-visible {
  outline: var(--blog-focus-width) solid var(--amp-sky);
  outline-offset: 4px;
}

.blog-list-hero {
  padding-block: clamp(2.5rem, 5vw, 4.5rem) 2rem;
  background: linear-gradient(to bottom, var(--amp-hero-top), var(--amp-bg));
}

.blog-list-heading {
  position: relative;
  isolation: isolate;
  padding: 2rem var(--blog-gutter);
}

.blog-list-heading::before {
  content: "";
  position: absolute;
  z-index: -1;
  inset-block: 0.5rem 1.5rem;
  inset-inline: 0 24%;
  border-radius: var(--r-card);
  border: 1px solid var(--amp-hi);
  background: var(--amp-sky-a10);
}

.blog-list-heading .eyebrow {
  margin: 0 0 0.75rem;
  color: var(--amp-navy);
  font-weight: var(--weight-bold);
}

.blog-list-heading h1 {
  max-width: 22ch;
  margin: 0;
  color: var(--amp-navy);
  font-size: var(--blog-list-title);
  line-height: var(--blog-title-leading);
}

.blog-list-intro {
  max-width: 42rem;
  margin: 1.25rem 0 0 1rem;
  color: var(--amp-muted);
  font-size: var(--blog-body-size);
  line-height: var(--blog-reading-leading);
}

.blog-catalog {
  padding-block: 1.5rem 3rem;
}

.blog-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.625rem;
}

.blog-filter-button {
  min-height: 2.75rem;
  padding: 0.625rem 1.125rem;
  border: 1px solid var(--amp-border);
  border-radius: var(--r-pill);
  background: var(--amp-panel);
  color: var(--amp-muted);
  font-family: var(--font-body);
  font-size: var(--blog-small-size);
  font-weight: var(--weight-medium);
  line-height: 1.5;
  cursor: pointer;
  transition: background var(--ease-short), border-color var(--ease-short), color var(--ease-short);
}

.blog-filter-button:hover {
  color: var(--amp-navy);
  border-color: var(--amp-sky);
}

.blog-filter-button.is-active,
.blog-filter-button[aria-pressed="true"] {
  color: var(--amp-white);
  background: var(--amp-navy);
  border-color: var(--amp-navy);
}

.blog-list-status {
  margin: 1.5rem 0;
  color: var(--amp-muted);
  font-size: var(--blog-small-size);
  line-height: 1.8;
}

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

.blog-post-card,
.related-card,
.post-nav-card {
  position: relative;
  border: 1px solid var(--amp-border);
  border-radius: var(--r-card);
  background: var(--amp-panel);
  box-shadow: var(--lift-sm), inset 0 1px 0 var(--amp-hi);
  transition: border-color var(--ease-short), transform var(--ease-short), box-shadow var(--ease-short);
}

.blog-post-card {
  display: flex;
  flex-direction: column;
  padding: 1.75rem;
  opacity: 1;
}

.blog-post-card:hover,
.related-card:hover,
.post-nav-card:hover {
  border-color: var(--amp-sky);
  transform: translateY(-3px);
  box-shadow: var(--lift);
}

.blog-post-card:focus-within,
.related-card:focus-within,
.post-nav-card:focus-visible {
  border-color: var(--amp-sky);
}

.blog-post-card h2 {
  margin: 1rem 0 0.75rem;
  font-size: var(--blog-subtitle);
  line-height: 1.55;
}

.blog-post-card h2 a,
.related-card h3 a {
  color: var(--amp-navy);
  text-decoration: none;
}

.blog-post-card h2 a:hover,
.related-card h3 a:hover {
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.blog-post-card > p,
.related-card > p {
  margin: 0 0 1.25rem;
  color: var(--amp-muted);
  font-size: var(--blog-body-size);
  line-height: 1.8;
  overflow-wrap: anywhere;
}

.blog-read-link {
  align-self: flex-start;
  margin-block-start: auto;
  color: var(--amp-navy);
  font-weight: var(--weight-bold);
  text-decoration: none;
  text-underline-offset: 0.2em;
}

.blog-read-link:hover {
  text-decoration: underline;
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  flex-wrap: wrap;
  gap: 0.5rem 0.75rem;
  color: var(--amp-muted);
  font-size: var(--blog-small-size);
  line-height: 1.5;
}

.article-meta .tag {
  display: inline-block;
  padding: 0.3rem 0.75rem;
  border: 1px solid var(--amp-navy);
  border-radius: var(--r-pill);
  background: var(--amp-navy);
  color: var(--amp-white);
  font-weight: var(--weight-medium);
}

.article-meta time,
.article-meta .read-time,
.article-meta .reading-time,
.article-meta > span:not(.tag) {
  padding: 0.3rem 0.75rem;
  border: 1px solid var(--amp-border);
  border-radius: var(--r-pill);
  background: var(--amp-panel);
  color: var(--amp-muted);
  font-variant-numeric: tabular-nums;
}

.blog-empty {
  grid-column: 1 / -1;
  margin: 0;
  padding: 2rem;
  border: 1px dashed var(--amp-border);
  border-radius: var(--r-card);
  background: var(--amp-groove);
  color: var(--amp-muted);
  line-height: var(--blog-reading-leading);
}

.blog-empty a {
  color: var(--amp-navy);
}

/* 共同盒宽包含左右内衬；标题与正文的内容左缘一致。 */
.reading-wrap,
.article-hero,
.breadcrumbs,
.breadcrumb,
.blog-breadcrumbs {
  box-sizing: border-box;
  width: 100%;
  max-width: calc(var(--blog-reading) + var(--blog-gutter) + var(--blog-gutter));
  margin-inline: auto;
  padding-inline: var(--blog-gutter);
  min-width: 0;
}

.breadcrumbs,
.breadcrumb,
.blog-breadcrumbs {
  margin-block: 0 1rem;
  padding-block-start: 1.5rem;
  color: var(--amp-muted);
  font-size: var(--blog-small-size);
  line-height: 1.8;
  overflow-wrap: anywhere;
}

.breadcrumbs ol,
.breadcrumb ol,
.blog-breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.65rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumbs li,
.breadcrumb li,
.blog-breadcrumbs li {
  min-width: 0;
}

.breadcrumbs li + li::before,
.breadcrumb li + li::before,
.blog-breadcrumbs li + li::before {
  content: "›";
  padding-inline-end: 0.65rem;
  color: var(--amp-muted);
}

.breadcrumbs a,
.breadcrumb a,
.blog-breadcrumbs a {
  color: var(--amp-navy);
  text-underline-offset: 0.2em;
}

/* offset-block：色块留在容器内，文字压在错位的浅色面板上。 */
.article-hero {
  position: relative;
  isolation: isolate;
  padding-block: 2rem 2.25rem;
  margin-block-end: 1.5rem;
}

.article-hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  inset-block: 0.5rem 1rem;
  inset-inline: 0 18%;
  border: 1px solid var(--amp-hi);
  border-radius: var(--r-card);
  background: linear-gradient(135deg, var(--amp-groove), var(--amp-sky-a06));
  box-shadow: inset 0 1px 0 var(--amp-hi);
  pointer-events: none;
}

.article-hero::after {
  content: "";
  position: absolute;
  z-index: -1;
  inset-block-start: 1.3rem;
  inset-inline-end: var(--blog-gutter);
  width: 4rem;
  height: 4rem;
  border: 2px solid var(--amp-sky-a18);
  background: var(--amp-sky-a06);
  clip-path: polygon(25% 0, 75% 0, 100% 50%, 75% 100%, 25% 100%, 0 50%);
  pointer-events: none;
}

.article-hero h1 {
  position: relative;
  margin: 1.25rem 0 1rem;
  color: var(--amp-navy);
  font-size: var(--blog-article-title);
  line-height: var(--blog-title-leading);
}

.article-hero .article-meta,
.article-hero .article-summary,
.article-hero .hero-summary,
.article-hero .article-deck,
.article-hero > p {
  position: relative;
  margin-inline-start: 1rem;
}

.article-hero .article-summary,
.article-hero .hero-summary,
.article-hero .article-deck,
.article-hero > p {
  margin-block: 1rem 0;
  color: var(--amp-muted);
  font-size: var(--blog-body-size);
  line-height: var(--blog-reading-leading);
}

.prose,
.article-body,
[data-article-body] {
  min-width: 0;
  color: var(--amp-ink);
  font-family: var(--font-body);
  font-size: var(--blog-body-size);
  font-weight: var(--weight-normal);
  line-height: var(--blog-reading-leading);
  overflow-wrap: anywhere;
  counter-reset: blog-section;
}

.prose > :first-child,
.article-body > :first-child,
[data-article-body] > :first-child {
  margin-block-start: 0;
}

.prose :is(p, ul, ol),
.article-body :is(p, ul, ol),
[data-article-body] :is(p, ul, ol) {
  margin-block: 0 1.25rem;
}

.prose :is(ul, ol),
.article-body :is(ul, ol),
[data-article-body] :is(ul, ol) {
  padding-inline-start: 1.5rem;
}

.prose li,
.article-body li,
[data-article-body] li {
  margin-block: 0.45rem;
}

.prose h2,
.article-body h2,
[data-article-body] h2 {
  margin-block: 2.5rem 1rem;
  color: var(--amp-navy);
  font-size: var(--blog-section-title);
  line-height: 1.55;
  scroll-margin-top: var(--anchor-offset);
}

.prose h2::before,
.article-body h2::before,
[data-article-body] h2::before {
  content: "";
  display: inline-block;
  width: 0.9rem;
  height: 0.9rem;
  margin-inline-end: 0.65rem;
  background: linear-gradient(135deg, var(--amp-sky), var(--amp-navy));
  clip-path: polygon(25% 0, 75% 0, 100% 50%, 75% 100%, 25% 100%, 0 50%);
  vertical-align: 0.05em;
}

.prose h3,
.article-body h3,
[data-article-body] h3 {
  margin-block: 1.75rem 0.75rem;
  color: var(--amp-navy);
  font-size: var(--blog-subtitle);
  line-height: 1.6;
}

.prose a,
.article-body a,
[data-article-body] a {
  color: var(--amp-navy);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

.prose strong,
.article-body strong,
[data-article-body] strong {
  font-weight: var(--weight-bold);
}

.prose blockquote,
.article-body blockquote,
[data-article-body] blockquote {
  margin: 1.75rem 0;
  padding: 1.25rem 1.5rem;
  border-inline-start: 4px solid var(--amp-sky);
  border-radius: var(--r-sm);
  background: var(--amp-groove);
  color: var(--amp-navy);
}

.prose blockquote > :last-child,
.article-body blockquote > :last-child,
[data-article-body] blockquote > :last-child {
  margin-block-end: 0;
}

.prose :not(pre) > code,
.article-body :not(pre) > code,
[data-article-body] :not(pre) > code {
  padding: 0.15em 0.4em;
  border-radius: var(--r-sm);
  background: var(--amp-groove);
  color: var(--amp-navy);
  font-family: var(--font-mono);
  font-size: 0.9em;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.prose pre,
.article-body pre,
[data-article-body] pre {
  position: relative;
  max-width: 100%;
  margin-block: 1.75rem;
  padding: 2.75rem 1.5rem 1.5rem;
  overflow-x: auto;
  border: 1px solid var(--amp-navy);
  border-radius: var(--r-card);
  background: var(--amp-ink);
  color: var(--amp-panel);
  font-family: var(--font-mono);
  font-size: var(--blog-small-size);
  line-height: 1.8;
  white-space: pre;
}

.prose pre::before,
.article-body pre::before,
[data-article-body] pre::before {
  content: "配置参考";
  position: absolute;
  inset-block-start: 0.7rem;
  inset-inline-start: 1.5rem;
  color: var(--amp-bar);
  font-family: var(--font-body);
  font-size: var(--blog-small-size);
}

.prose pre code,
.article-body pre code,
[data-article-body] pre code {
  padding: 0;
  background: inherit;
  color: inherit;
  font-family: var(--font-mono);
  font-size: inherit;
  white-space: inherit;
  overflow-wrap: normal;
  word-break: normal;
}

.prose .table-scroll,
.article-body .table-scroll,
[data-article-body] .table-scroll {
  max-width: 100%;
  margin-block: 1.75rem;
  overflow-x: auto;
  border: 1px solid var(--amp-border);
  border-radius: var(--r-sm);
  background: var(--amp-panel);
}

.prose table,
.article-body table,
[data-article-body] table {
  width: 100%;
  margin-block: 1.5rem;
  border-collapse: collapse;
  background: var(--amp-panel);
  font-size: var(--blog-small-size);
  line-height: 1.8;
}

.prose .table-scroll table,
.article-body .table-scroll table,
[data-article-body] .table-scroll table {
  margin-block: 0;
}

.prose caption,
.article-body caption,
[data-article-body] caption {
  padding: 0.75rem 1rem;
  color: var(--amp-muted);
  text-align: start;
  font-weight: var(--weight-medium);
}

.prose :is(th, td),
.article-body :is(th, td),
[data-article-body] :is(th, td) {
  min-width: 8rem;
  padding: 0.9rem 1rem;
  border-block-end: 1px solid var(--amp-border);
  text-align: start;
  vertical-align: top;
}

.prose thead th,
.article-body thead th,
[data-article-body] thead th {
  background: var(--amp-navy);
  color: var(--amp-white);
  font-weight: var(--weight-bold);
}

.prose tbody tr:nth-child(even),
.article-body tbody tr:nth-child(even),
[data-article-body] tbody tr:nth-child(even) {
  background: var(--amp-bg);
}

.prose tbody tr:hover,
.article-body tbody tr:hover,
[data-article-body] tbody tr:hover {
  background: var(--amp-groove);
}

.callout,
.verdict {
  position: relative;
  margin-block: 1.75rem;
  padding: 1.25rem 1.5rem;
  border: 1px solid var(--amp-border);
  border-inline-start: 4px solid var(--amp-sky);
  border-radius: var(--r-sm);
  background: var(--amp-sky-a06);
  color: var(--amp-ink);
  line-height: var(--blog-reading-leading);
}

.callout {
  padding-inline-start: 3.5rem;
}

.callout::before {
  content: "i";
  position: absolute;
  inset-block-start: 1.3rem;
  inset-inline-start: 1.1rem;
  display: inline-grid;
  place-items: center;
  width: 1.45rem;
  height: 1.45rem;
  border-radius: var(--r-round);
  background: var(--amp-navy);
  color: var(--amp-white);
  font-family: var(--font-mono);
  font-weight: var(--weight-bold);
  line-height: 1;
}

.callout.warning,
.callout.is-warning,
.callout-warning {
  border-inline-start-color: var(--amp-warn);
  background: var(--amp-bar-soft);
}

.callout.warning::before,
.callout.is-warning::before,
.callout-warning::before {
  content: "!";
  background: var(--amp-navy);
  color: var(--amp-bar);
}

.callout.success,
.callout.is-success,
.callout-success {
  border-inline-start-color: var(--amp-success);
  background: color-mix(in srgb, var(--amp-success) 9%, var(--amp-panel));
}

.callout.success::before,
.callout.is-success::before,
.callout-success::before {
  background: var(--amp-navy);
  color: var(--amp-white);
}

.callout > :last-child,
.verdict > :last-child {
  margin-block-end: 0;
}

.verdict {
  background: var(--amp-panel);
  box-shadow: var(--lift-sm);
}

.verdict strong:first-child {
  color: var(--amp-navy);
  font-weight: var(--weight-display);
}

.stat-grid {
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 12rem), 1fr));
  margin-block: 1.75rem;
}

.stat-card {
  padding: 1.5rem;
  border: 1px solid var(--amp-border);
  border-block-start: 4px solid var(--amp-sky);
  border-radius: var(--r-card);
  background: var(--amp-panel);
  box-shadow: var(--lift-sm);
}

.stat-card:nth-child(even) {
  border-block-start-color: var(--amp-navy);
  background: var(--amp-groove);
}

.stat-num {
  display: block;
  margin-block-end: 0.5rem;
  color: var(--amp-navy);
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: var(--weight-bold);
  line-height: 1.4;
  font-variant-numeric: tabular-nums;
  overflow-wrap: anywhere;
}

.stat-label {
  display: block;
  color: var(--amp-muted);
  font-size: var(--blog-small-size);
  line-height: 1.8;
}

.prose .check-list,
.article-body .check-list,
[data-article-body] .check-list,
.check-list {
  display: grid;
  gap: 0.65rem;
  margin-block: 1.5rem;
  padding: 0;
  list-style: none;
}

.check-list li {
  margin: 0;
  padding: 0.9rem 1.1rem;
  border: 1px solid var(--amp-border);
  border-radius: var(--r-item);
  background: var(--amp-panel);
  list-style: none;
}

.reading-wrap .promo-block,
.promo-block.reading-wrap {
  margin-block: 2.5rem 1.5rem;
}

.promo-block {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
  padding: 2rem;
  border: 1px solid var(--amp-navy);
  border-radius: var(--r-card);
  background: linear-gradient(120deg, var(--amp-navy), var(--amp-navy-2));
  color: var(--amp-white);
  box-shadow: var(--lift);
  line-height: 1.8;
}

.promo-block > div {
  flex: 1 1 18rem;
  min-width: 0;
}

.promo-block h2 {
  margin: 0 0 0.5rem;
  color: var(--amp-white);
  font-size: var(--blog-section-title);
  line-height: 1.5;
}

.promo-block h2::before {
  content: none;
}

.promo-block p {
  margin: 0;
  color: var(--amp-white);
  font-size: var(--blog-body-size);
}

.promo-block .btn-primary,
.prose .promo-block .btn-primary,
.article-body .promo-block .btn-primary,
[data-article-body] .promo-block .btn-primary {
  border: 1px solid var(--amp-white);
  background: var(--amp-white);
  color: var(--amp-navy);
  text-decoration: none;
}

.promo-block .btn-ghost,
.promo-block .btn-secondary {
  border: 1px solid var(--amp-white);
  background: var(--amp-navy);
  color: var(--amp-white);
  text-decoration: none;
}

.promo-block .btn:focus-visible {
  outline: var(--blog-focus-width) solid var(--amp-bar);
  outline-offset: 4px;
}

#post-nav {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-block: 0;
  padding-block: 1.5rem 1rem;
}

#related-posts {
  margin-block: 0;
  padding-block: 1.5rem 2.5rem;
}

#post-nav[hidden],
#related-posts[hidden] {
  display: none;
}

#related-posts > h2 {
  margin: 0 0 1.25rem;
  color: var(--amp-navy);
  font-size: var(--blog-section-title);
  line-height: 1.5;
}

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

.related-card {
  padding: 1.25rem;
}

.related-card h3 {
  margin: 1rem 0 0.75rem;
  font-size: 1.1rem;
  line-height: 1.65;
}

.related-card > p {
  margin-block-end: 0;
  font-size: var(--blog-small-size);
}

.post-nav-card {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1.5rem;
  color: var(--amp-navy);
  text-decoration: none;
  overflow-wrap: anywhere;
}

.post-nav-previous {
  grid-column: 1;
}

.post-nav-next {
  grid-column: 2;
}

.post-nav-label,
.post-nav-card time {
  color: var(--amp-muted);
  font-size: var(--blog-small-size);
}

.post-nav-card strong {
  font-family: var(--font-display);
  font-weight: var(--weight-bold);
  line-height: 1.65;
}

.post-nav-card time {
  margin-block-start: auto;
  font-variant-numeric: tabular-nums;
}

.blog-signup-dialog {
  box-sizing: border-box;
  width: calc(100% - 2rem);
  max-width: 30rem;
  max-height: calc(100dvh - 2rem);
  margin: auto;
  padding: 0;
  overflow-y: auto;
  border: 1px solid var(--amp-hi);
  border-radius: var(--r-card);
  background: var(--amp-panel);
  color: var(--amp-ink);
  box-shadow: var(--lift);
  opacity: 0;
  transform: translateY(0.65rem) scale(0.98);
  transition: opacity var(--blog-modal-time), transform var(--blog-modal-time);
}

.blog-signup-dialog::backdrop {
  background: var(--amp-navy-a28);
  backdrop-filter: blur(5px);
}

.blog-signup-dialog.is-visible {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.blog-signup-dialog.is-closing {
  opacity: 0;
  transform: translateY(0.5rem) scale(0.98);
}

.blog-signup-panel {
  position: relative;
  padding: 2.5rem 2rem 2rem;
  background: linear-gradient(150deg, var(--amp-hero-top), var(--amp-panel));
}

.blog-signup-panel::before {
  content: "";
  position: absolute;
  inset-block-start: 1.5rem;
  inset-inline-end: 4.5rem;
  width: 3rem;
  height: 3rem;
  background: var(--amp-sky-a12);
  clip-path: polygon(25% 0, 75% 0, 100% 50%, 75% 100%, 25% 100%, 0 50%);
  pointer-events: none;
}

.blog-signup-close {
  position: absolute;
  inset-block-start: 0.75rem;
  inset-inline-end: 0.75rem;
  display: grid;
  place-items: center;
  width: 2.75rem;
  height: 2.75rem;
  padding: 0;
  border: 1px solid var(--amp-border);
  border-radius: var(--r-round);
  background: var(--amp-panel);
  color: var(--amp-navy);
  font-family: var(--font-body);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
}

.blog-signup-close:hover {
  border-color: var(--amp-sky);
  background: var(--amp-groove);
}

.blog-signup-brand {
  margin: 0 3rem 1.25rem 0;
  color: var(--amp-navy);
  font-family: var(--font-display);
  font-weight: var(--weight-display);
  font-size: var(--blog-subtitle);
}

.blog-signup-dialog h2 {
  position: relative;
  margin: 0 0 1rem;
  color: var(--amp-navy);
  font-size: var(--blog-section-title);
  line-height: 1.5;
}

#blog-signup-description {
  margin: 0 0 1.5rem;
  color: var(--amp-muted);
  font-family: var(--font-body);
  font-size: var(--blog-body-size);
  line-height: var(--blog-reading-leading);
}

.blog-signup-cta {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 2.75rem;
  padding: 0.75rem 1.5rem;
  border: 1px solid var(--amp-navy);
  border-radius: var(--r-pill);
  background: linear-gradient(120deg, var(--amp-navy), var(--amp-navy-2));
  color: var(--amp-white);
  font-family: var(--font-body);
  font-weight: var(--weight-bold);
  line-height: 1.5;
  text-decoration: none;
}

@media (max-width: 860px) {
  .related-grid {
    grid-template-columns: 1fr;
  }

  .prose table,
  .article-body table,
  [data-article-body] table {
    display: block;
    width: fit-content;
    max-width: 100%;
    overflow-x: auto;
  }
}

@media (max-width: 640px) {
  .no-break {
    white-space: normal;
  }

  .blog-card-grid,
  #post-nav {
    grid-template-columns: 1fr;
  }

  .post-nav-previous,
  .post-nav-next {
    grid-column: 1;
  }

  .blog-list-heading {
    padding-block: 1.5rem;
  }

  .blog-list-heading::before {
    inset-inline-end: 12%;
  }

  .blog-list-intro,
  .article-hero .article-meta,
  .article-hero .article-summary,
  .article-hero .hero-summary,
  .article-hero .article-deck,
  .article-hero > p {
    margin-inline-start: 0;
  }

  .article-hero {
    padding-block: 1.5rem;
    margin-block-end: 1.25rem;
  }

  .article-hero::before {
    inset-inline-end: 8%;
  }

  .article-hero::after {
    width: 2.5rem;
    height: 2.5rem;
    inset-block-start: 0.75rem;
  }

  .blog-post-card,
  .promo-block {
    padding: 1.5rem;
  }

  .promo-block .btn {
    width: 100%;
    justify-content: center;
  }

  .blog-signup-panel {
    padding: 2rem 1.5rem 1.5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .blog-post-card,
  .related-card,
  .post-nav-card,
  .blog-filter-button,
  .blog-signup-dialog {
    transition: none;
    animation: none;
  }

  .blog-post-card:hover,
  .related-card:hover,
  .post-nav-card:hover,
  .blog-signup-dialog,
  .blog-signup-dialog.is-visible,
  .blog-signup-dialog.is-closing {
    transform: none;
  }
}