:root {
  --blog-reading: 52.5rem;
  --blog-gutter: max(1.5rem, var(--gutter));
  --blog-column: calc(var(--blog-reading) + var(--blog-gutter) + var(--blog-gutter));
  --blog-title-size: clamp(2rem, 4vw, 2.6rem);
  --blog-list-title-size: clamp(2rem, 4.5vw, 3rem);
  --blog-h2-size: clamp(1.3rem, 2.5vw, 1.6rem);
  --blog-h3-size: clamp(1.1rem, 2vw, 1.3rem);
  --blog-body-size: 1rem;
  --blog-radius: var(--radius-lg);
  --blog-card-radius: var(--radius-md);
}

.blog-page {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
}

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

.blog-page :is(h1, h2, h3),
.article-hero :is(h1, h2, h3),
.prose :is(h1, h2, h3),
.article-body :is(h1, h2, h3),
.post-content :is(h1, h2, h3),
[data-article-body] :is(h1, h2, h3) {
  display: block;
  font-family: var(--font-display);
  letter-spacing: -0.015em;
  text-wrap: pretty;
  overflow-wrap: anywhere;
}

.blog-page :is(a, button):focus-visible,
#related-posts a:focus-visible,
#post-nav a:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 4px;
}

.blog-skip {
  position: fixed;
  z-index: 100;
  top: 1rem;
  left: 1rem;
  padding: 0.8rem 1.2rem;
  border-radius: var(--radius-pill);
  background: var(--accent);
  color: var(--on-accent);
  transform: translateY(-200%);
}

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

.blog-list-main {
  padding-block: 2rem 4rem;
}

.blog-list-hero {
  position: relative;
  isolation: isolate;
  padding: 3rem var(--blog-gutter);
  margin-block: 0 2rem;
  border-radius: var(--blog-radius);
  overflow: hidden;
}

.blog-list-hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  inset: 1rem 18% 1.5rem 0;
  background: var(--bg-panel-2);
  border-radius: var(--blog-radius);
}

.blog-list-hero::after {
  content: "";
  position: absolute;
  z-index: -1;
  width: 35%;
  height: 80%;
  right: 0;
  bottom: 0;
  border-radius: var(--radius-round);
  background: radial-gradient(ellipse, var(--blob-rose), var(--clear) 72%);
}

.blog-list-hero h1 {
  max-width: 20ch;
  margin-block: 1rem;
  font-size: var(--blog-list-title-size);
  line-height: 1.25;
  font-weight: 900;
}

.blog-list-hero p {
  max-width: 44rem;
  margin: 0;
  color: var(--text-muted);
  font-size: var(--blog-body-size);
  line-height: 1.9;
}

.blog-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.blog-filter {
  min-height: 2.75rem;
  padding: 0.65rem 1.15rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  background: var(--bg-panel);
  color: var(--accent);
  font: inherit;
  cursor: pointer;
  transition: background-color 160ms ease, border-color 160ms ease;
}

.blog-filter:hover {
  border-color: var(--accent);
  background: var(--bg-panel-2);
}

.blog-filter[aria-pressed="true"] {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--on-accent);
  box-shadow: var(--shadow-chip);
}

.blog-status {
  margin-block: 1rem 1.5rem;
  color: var(--text-muted);
  font-size: 0.875rem;
  line-height: 1.8;
}

.blog-card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem;
}

.blog-card {
  display: flex;
  flex-direction: column;
  min-width: 0;
  margin: 0;
  padding: 1.5rem;
  border: 1px solid var(--border);
  border-top: 3px solid var(--border);
  border-radius: var(--blog-card-radius);
  background: var(--bg-panel);
  box-shadow: var(--shadow-card);
  transition: border-color 180ms ease, transform 180ms ease;
}

.blog-card:hover,
.blog-card:focus-within {
  border-top-color: var(--accent);
  transform: translateY(-3px);
}

.article-card__meta,
.article-meta,
.article-hero__meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-start;
  align-items: center;
  gap: 0.6rem;
  color: var(--text-muted);
  font-size: 0.8125rem;
  line-height: 1.6;
}

.blog-card .tag,
.article-hero .tag {
  display: inline-block;
  padding: 0.3rem 0.7rem;
  border: 1px solid var(--accent);
  border-radius: var(--radius-pill);
  background: var(--accent);
  color: var(--on-accent);
}

.blog-card h3 {
  margin-block: 1.15rem 0.75rem;
  font-size: var(--blog-h3-size);
  line-height: 1.65;
}

.blog-card h3 a {
  color: var(--text);
  text-decoration: none;
}

.blog-card h3 a:hover {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.blog-card p {
  margin-block: 0 1.25rem;
  color: var(--text-muted);
  font-size: var(--blog-body-size);
  line-height: 1.85;
  overflow-wrap: anywhere;
}

.blog-card .article-card__link {
  align-self: flex-start;
  margin-top: auto;
  color: var(--accent);
  font-weight: 700;
  text-underline-offset: 0.25em;
}

.blog-empty {
  grid-column: 1 / -1;
  padding: 2rem;
  border: 1px dashed var(--border);
  border-radius: var(--blog-card-radius);
  background: var(--bg-panel-2);
  color: var(--text-muted);
  line-height: 1.85;
}

/* 阅读页所有外层盒使用相同宽度与内衬。 */
.breadcrumbs,
.breadcrumb,
.article-breadcrumbs,
.article-hero,
.reading-wrap {
  box-sizing: border-box;
  width: 100%;
  max-width: var(--blog-column);
  margin-inline: auto;
  padding-inline: var(--blog-gutter);
}

.reading-wrap {
  width: 100%;
  max-width: var(--blog-column);
  padding-inline: var(--blog-gutter);
  margin-inline: auto;
  min-width: 0;
}

.breadcrumbs,
.breadcrumb,
.article-breadcrumbs {
  padding-top: 1.5rem;
  margin-top: 0;
  margin-bottom: 1rem;
  color: var(--text-muted);
  font-size: 0.8125rem;
  line-height: 1.9;
  overflow-wrap: anywhere;
}

:is(.breadcrumb, .breadcrumbs, .article-breadcrumbs) ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.65rem;
  margin: 0;
  padding-block: 0;
  padding-inline-start: 0;
  list-style: none;
}

:is(.breadcrumb, .breadcrumbs, .article-breadcrumbs) a {
  color: var(--accent);
  text-underline-offset: 0.2em;
}

.article-hero {
  position: relative;
  isolation: isolate;
  padding-block: 2.25rem 2rem;
  margin-block: 0 1.5rem;
}

.article-hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: 0.5rem;
  bottom: 1rem;
  left: var(--blog-gutter);
  right: calc(var(--blog-gutter) + 16%);
  border-radius: var(--blog-radius);
  background: linear-gradient(125deg, var(--tint-12), var(--bg-panel-2));
}

.article-hero::after {
  content: "";
  position: absolute;
  z-index: -1;
  top: 1.5rem;
  right: var(--blog-gutter);
  width: 3rem;
  height: 3rem;
  background: var(--spark-teal);
  opacity: 0.45;
  clip-path: polygon(50% 0, 61% 39%, 100% 50%, 61% 61%, 50% 100%, 39% 61%, 0 50%, 39% 39%);
}

.article-hero h1 {
  position: relative;
  margin-block: 1.25rem 1rem;
  font-size: var(--blog-title-size);
  font-weight: 900;
  line-height: 1.4;
}

.article-hero :is(.article-meta, .article-hero__meta, .article-summary, .article-hero__summary, .article-hero__lead) {
  margin-left: 1rem;
}

.article-hero :is(time, .reading-time, .read-time) {
  display: inline-block;
  padding: 0.3rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  background: var(--bg-panel);
  color: var(--text-muted);
}

.article-hero > p,
.article-summary,
.article-hero__summary,
.article-hero__lead {
  max-width: 49rem;
  margin-block: 0;
  color: var(--text-muted);
  font-size: var(--blog-body-size);
  line-height: 1.9;
}

:is(.prose, .article-body, .post-content, [data-article-body]) {
  min-width: 0;
  color: var(--text);
  font-family: var(--font-body);
  font-size: var(--blog-body-size);
  line-height: 1.9;
  overflow-wrap: anywhere;
  counter-reset: blog-chapter;
}

:is(.prose, .article-body, .post-content, [data-article-body]) > :first-child {
  margin-top: 0;
}

:is(.prose, .article-body, .post-content, [data-article-body]) h2 {
  position: relative;
  margin-block: 2.5rem 1rem;
  font-size: var(--blog-h2-size);
  line-height: 1.65;
  scroll-margin-top: var(--anchor-offset);
}

:is(.prose, .article-body, .post-content, [data-article-body]) h2::before {
  counter-increment: blog-chapter;
  content: counter(blog-chapter, decimal-leading-zero);
  display: inline-block;
  margin-right: 0.6rem;
  padding: 0.12rem 0.45rem;
  border-radius: var(--radius-xs);
  background: var(--bg-panel-2);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.8em;
  vertical-align: 0.1em;
}

:is(.prose, .article-body, .post-content, [data-article-body]) h3 {
  margin-block: 1.75rem 0.75rem;
  font-size: var(--blog-h3-size);
  line-height: 1.7;
}

:is(.prose, .article-body, .post-content, [data-article-body]) :is(p, ul, ol) {
  margin-block: 0 1.2rem;
}

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

:is(.prose, .article-body, .post-content, [data-article-body]) li + li {
  margin-top: 0.5rem;
}

:is(.prose, .article-body, .post-content, [data-article-body]) a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.22em;
}

:is(.prose, .article-body, .post-content, [data-article-body]) img {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: var(--blog-card-radius);
}

:is(.prose, .article-body, .post-content, [data-article-body]) .table-scroll {
  max-width: 100%;
  margin-block: 1.5rem;
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--blog-card-radius);
}

:is(.prose, .article-body, .post-content, [data-article-body]) table {
  width: 100%;
  margin-block: 1.5rem;
  border-collapse: collapse;
  font-size: 0.9375rem;
  line-height: 1.8;
}

:is(.prose, .article-body, .post-content, [data-article-body]) .table-scroll table {
  margin: 0;
}

:is(.prose, .article-body, .post-content, [data-article-body]) :is(th, td) {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

:is(.prose, .article-body, .post-content, [data-article-body]) thead th {
  background: var(--accent);
  color: var(--on-accent);
  font-weight: 700;
}

:is(.prose, .article-body, .post-content, [data-article-body]) tbody tr:nth-child(even) {
  background: var(--bg-panel-2);
}

:is(.prose, .article-body, .post-content, [data-article-body]) tbody tr:hover {
  background: var(--lavender);
}

:is(.prose, .article-body, .post-content, [data-article-body]) code {
  padding: 0.15em 0.35em;
  border-radius: var(--radius-xs);
  background: var(--bg-panel-2);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.9em;
}

:is(.prose, .article-body, .post-content, [data-article-body]) pre {
  position: relative;
  max-width: 100%;
  margin-block: 1.5rem;
  padding: 3rem 1.5rem 1.5rem;
  overflow-x: auto;
  border: 1px solid var(--accent);
  border-radius: var(--blog-card-radius);
  background: var(--accent-dark);
  color: var(--on-accent);
  box-shadow: var(--shadow-card);
  line-height: 1.85;
  white-space: pre;
  overflow-wrap: normal;
}

:is(.prose, .article-body, .post-content, [data-article-body]) pre::before {
  content: "";
  position: absolute;
  top: 1rem;
  left: 1.5rem;
  width: 0.6rem;
  height: 0.6rem;
  border-radius: var(--radius-round);
  background: var(--light-red);
  box-shadow: 1.1rem 0 0 var(--light-yellow), 2.2rem 0 0 var(--light-green);
}

:is(.prose, .article-body, .post-content, [data-article-body]) pre code {
  padding: 0;
  background: var(--clear);
  color: inherit;
}

.callout,
blockquote.callout {
  position: relative;
  margin: 1.5rem 0;
  padding: 1.2rem 1.25rem 1.2rem 3.5rem;
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: var(--blog-card-radius);
  background: var(--bg-panel-2);
  color: var(--text);
  line-height: 1.9;
}

.callout::before {
  content: "i";
  position: absolute;
  top: 1.35rem;
  left: 1rem;
  width: 1.5rem;
  height: 1.5rem;
  border-radius: var(--radius-round);
  background: var(--accent);
  color: var(--on-accent);
  font-family: var(--font-mono);
  font-weight: 700;
  line-height: 1.5rem;
  text-align: center;
}

.callout--warning,
.callout.warning {
  border-left-color: var(--warn);
  background: color-mix(in srgb, var(--warn) 10%, var(--bg-panel));
}

.callout--warning::before,
.callout.warning::before {
  content: "!";
  background: var(--warn);
  color: var(--text);
}

.callout--success,
.callout.success {
  border-left-color: var(--success);
  background: color-mix(in srgb, var(--success) 9%, var(--bg-panel));
}

.callout--success::before,
.callout.success::before {
  content: "✓";
  background: var(--success);
}

.callout > :last-child {
  margin-bottom: 0;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 12rem), 1fr));
  gap: 1rem;
  margin-block: 1.5rem;
}

.stat-card {
  padding: 1.3rem;
  border: 1px solid var(--border);
  border-top: 3px solid var(--accent);
  border-radius: var(--blog-card-radius);
  background: var(--bg-panel-2);
}

.stat-card:nth-child(even) {
  border-top-color: var(--success);
  background: color-mix(in srgb, var(--success) 8%, var(--bg-panel));
}

.stat-num {
  display: block;
  color: var(--accent);
  font-family: var(--font-display);
  font-size: 1.65rem;
  font-weight: 800;
  line-height: 1.5;
}

.stat-label {
  display: block;
  margin-top: 0.4rem;
  color: var(--text-muted);
  font-size: 0.9375rem;
  line-height: 1.8;
}

.check-list,
:is(.prose, .article-body, .post-content, [data-article-body]) .check-list {
  display: grid;
  gap: 0.7rem;
  padding: 0;
  margin-block: 1.5rem;
  list-style: none;
}

.check-list li {
  padding: 0.9rem 1.1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-panel);
  list-style: none;
}

.check-list li + li {
  margin-top: 0;
}

.verdict {
  margin-block: 1.5rem;
  padding: 1rem 1.25rem;
  border-left: 4px solid var(--accent);
  border-radius: var(--radius-sm);
  background: var(--tint-8);
  color: var(--text);
  line-height: 1.9;
}

.verdict > :last-child {
  margin-bottom: 0;
}

.blog-promo,
.reading-wrap .promo-block {
  position: relative;
  isolation: isolate;
  display: block;
  overflow: hidden;
  margin-block: 2.5rem 1.5rem;
  padding: 2rem;
  border: 1px solid var(--lavender-edge);
  border-radius: var(--blog-radius);
  background: linear-gradient(120deg, var(--bg-panel-2), var(--bg-panel));
  color: var(--text);
  box-shadow: var(--shadow-card);
}

.blog-promo::before,
.reading-wrap .promo-block::before {
  content: "";
  position: absolute;
  z-index: -1;
  inset: 0.65rem;
  border: 1px solid var(--border);
  border-radius: var(--blog-card-radius);
  pointer-events: none;
}

.blog-promo h2,
.reading-wrap .promo-block h2 {
  margin-block: 0 0.75rem;
  color: var(--accent);
  font-size: var(--blog-h2-size);
  line-height: 1.6;
}

.blog-promo p,
.reading-wrap .promo-block p {
  margin-block: 0 1.25rem;
  color: var(--text-muted);
  line-height: 1.9;
}

.blog-promo .cta-pair,
.reading-wrap .promo-block .cta-pair {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.blog-promo .btn--solid,
.reading-wrap .promo-block .btn--solid {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--on-accent);
}

.blog-promo .btn--outline,
.reading-wrap .promo-block .btn--outline {
  background: var(--bg-panel);
  border-color: var(--accent);
  color: var(--accent);
}

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

.blog-section-title,
#related-posts > h2 {
  margin-block: 0 1.25rem;
  font-size: var(--blog-h2-size);
  line-height: 1.6;
}

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

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

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

.post-nav__card {
  min-width: 0;
  padding: 1.3rem;
  border: 1px solid var(--border);
  border-top: 3px solid var(--border);
  border-radius: var(--blog-card-radius);
  background: var(--bg-panel);
  color: var(--text);
  text-decoration: none;
  transition: border-color 180ms ease, transform 180ms ease;
}

.post-nav__card:hover,
.post-nav__card:focus-visible {
  border-top-color: var(--accent);
  transform: translateY(-3px);
}

.post-nav__next {
  grid-column: 2;
}

.post-nav__label {
  display: block;
  margin-bottom: 0.6rem;
  color: var(--text-muted);
  font-size: 0.8125rem;
}

.post-nav__title {
  display: block;
  font-size: var(--blog-body-size);
  line-height: 1.85;
  overflow-wrap: anywhere;
}

/* 仅提供组件样式；列表页不挂载悬浮入口。 */
.float-cta {
  position: fixed;
  z-index: 30;
  right: 1.5rem;
  bottom: calc(1.5rem + env(safe-area-inset-bottom));
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  max-width: calc(100vw - 3rem);
  min-height: 3rem;
  padding: 0.8rem 1.3rem;
  border: 1px solid var(--lavender-edge);
  border-radius: var(--radius-pill);
  background: var(--accent);
  color: var(--on-accent);
  box-shadow: var(--shadow-float);
  font-family: var(--font-body);
  font-weight: 700;
  text-decoration: none;
}

.float-cta svg {
  flex: 0 0 auto;
  width: 1.2rem;
  height: 1.2rem;
  fill: currentColor;
}

@media (max-width: 860px) {
  :is(.prose, .article-body, .post-content, [data-article-body]) table {
    display: block;
    width: fit-content;
    max-width: 100%;
    overflow-x: auto;
  }

  :is(.prose, .article-body, .post-content, [data-article-body]) :is(th, td) {
    min-width: 9rem;
  }
}

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

  .blog-card-grid,
  .related-grid,
  #post-nav {
    grid-template-columns: minmax(0, 1fr);
  }

  .blog-list-main {
    padding-block: 1.25rem 2.5rem;
  }

  .blog-list-hero {
    padding-block: 2rem;
  }

  .blog-card {
    padding: 1.25rem;
  }

  .article-hero {
    padding-block: 1.75rem 1.5rem;
    margin-bottom: 1rem;
  }

  .article-hero h1 {
    font-size: clamp(1.8rem, 7vw, 2.3rem);
  }

  .article-hero :is(.article-meta, .article-hero__meta, .article-summary, .article-hero__summary, .article-hero__lead) {
    margin-left: 0;
  }

  .article-hero::after {
    width: 1.5rem;
    height: 1.5rem;
    top: 0.5rem;
  }

  .blog-promo,
  .reading-wrap .promo-block {
    padding: 1.5rem;
  }

  .post-nav__next {
    grid-column: auto;
  }

  .float-cta {
    right: 1rem;
    bottom: calc(0.75rem + env(safe-area-inset-bottom));
    min-height: 2.75rem;
    padding: 0.65rem 1rem;
    font-size: 0.875rem;
  }

  body:has(.float-cta) {
    padding-bottom: calc(5rem + env(safe-area-inset-bottom));
    scroll-padding-bottom: 5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .blog-filter,
  .blog-card,
  .post-nav__card {
    transition: none;
  }

  .blog-card:hover,
  .blog-card:focus-within,
  .post-nav__card:hover,
  .post-nav__card:focus-visible {
    transform: none;
  }
}