.blog-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--color-border);
  background:
    linear-gradient(var(--color-grid-blue) 1px, var(--color-black-soft) 1px),
    linear-gradient(90deg, var(--color-grid-brown) 1px, var(--color-black-soft) 1px),
    var(--color-bg-panel-2);
  background-size: 3rem 3rem;
}

.blog-hero::after {
  position: absolute;
  right: var(--gutter);
  bottom: 0;
  width: min(34rem, 48vw);
  height: 0.35rem;
  content: "";
  background: var(--color-error);
  box-shadow: 0 0 1.5rem var(--color-error-soft);
}

.blog-hero .wrap {
  position: relative;
  z-index: 1;
  max-width: var(--page-width);
}

.blog-hero h1 {
  max-width: 14ch;
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 7vw, 6.8rem);
  line-height: 0.96;
  letter-spacing: -0.055em;
}

.blog-hero .lead {
  max-width: 46rem;
  margin-top: 1.5rem;
}

.blog-control-panel {
  border: 1px solid var(--color-border);
  background: var(--color-bg-panel);
  box-shadow:
    inset 0 1px var(--color-white-glint),
    inset 0 -1rem 2rem var(--color-black-soft),
    0 1rem 2.5rem var(--color-shadow);
}

.blog-control-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--color-border);
}

.blog-control-head h2 {
  margin: 0.2rem 0 0;
  font-family: var(--font-display);
}

.blog-result-status {
  margin: 0;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.05em;
}

.blog-filter-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  padding: 1rem 1.5rem 1.5rem;
}

.blog-filter {
  min-height: var(--control-height);
  margin: -1px 0 0 -1px;
  padding: 0.65rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-none);
  color: var(--color-text-muted);
  background: var(--color-bg-panel-2);
  font: inherit;
  cursor: pointer;
  transition:
    color 160ms var(--ease-machine),
    background-color 160ms var(--ease-machine),
    box-shadow 160ms var(--ease-machine);
}

.blog-filter:hover,
.blog-filter:focus-visible {
  color: var(--color-text);
  background: var(--color-accent-soft);
}

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

.blog-filter.is-active {
  position: relative;
  z-index: 1;
  color: var(--color-bg);
  border-color: var(--color-error);
  background: var(--color-accent);
  box-shadow: inset 0 -0.3rem var(--color-accent-dark);
}

.blog-feed {
  background: var(--color-bg);
}

.section-heading {
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-border);
}

.section-heading h2 {
  margin: 0.25rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 3rem);
}

.post-list {
  display: grid;
  border-top: 1px solid var(--color-border);
}

.post-card {
  position: relative;
  display: grid;
  grid-template-columns: minmax(9rem, 0.28fr) minmax(16rem, 1fr) minmax(15rem, 0.8fr) auto;
  gap: 1.5rem;
  align-items: center;
  min-width: 0;
  padding: 1.5rem;
  border: 1px solid var(--color-border);
  border-top: 0;
  border-radius: var(--radius-none);
  background: var(--color-bg-panel);
  box-shadow: inset 0 1px var(--color-white-glint);
}

.post-card::before {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 0.25rem;
  content: "";
  background: var(--color-accent-dark);
  transition: background-color 160ms var(--ease-machine);
}

.post-card:hover::before {
  background: var(--color-error);
}

.post-card h3 {
  min-width: 0;
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2vw, 1.45rem);
  line-height: 1.35;
}

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

.post-card h3 a:hover {
  color: var(--color-accent);
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  align-items: center;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

.post-summary {
  margin: 0;
  color: var(--color-text-muted);
  line-height: 1.75;
}

.post-read-link {
  display: inline-flex;
  align-items: center;
  min-height: var(--control-height);
  padding: 0.55rem 0.9rem;
  border: 1px solid var(--color-border);
  color: var(--color-accent);
  background: var(--color-bg-panel-2);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-decoration: none;
  white-space: nowrap;
}

.post-read-link::after {
  margin-left: 0.55rem;
  content: "→";
  color: var(--color-error);
}

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

.blog-empty {
  margin: 0;
  padding: 2rem;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  background: var(--color-bg-panel);
  text-align: center;
}

/* 文章页面包屑 */
.breadcrumbs {
  max-width: var(--page-width);
  margin: 1.5rem auto 0;
  padding: 0 var(--gutter);
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin: 0;
  padding: 0.8rem 0;
  border-bottom: 1px solid var(--color-border);
  list-style: none;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

.breadcrumbs li {
  display: inline-flex;
  gap: 0.55rem;
  align-items: center;
}

.breadcrumbs li:not(:last-child)::after {
  content: "/";
  color: var(--color-accent-dark);
}

.breadcrumbs a {
  color: var(--color-accent);
  text-decoration: none;
}

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

/* 文章标题区 */
.article-hero {
  border-bottom: 1px solid var(--color-border);
  background:
    linear-gradient(90deg, var(--color-grid-brown) 1px, var(--color-black-soft) 1px),
    var(--color-bg-panel-2);
  background-size: 4rem 100%;
}

.article-hero .wrap {
  max-width: var(--content-width);
}

.article-hero .post-meta {
  margin-bottom: 1.2rem;
}

.article-hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 6vw, 4.8rem);
  line-height: 1.08;
  letter-spacing: -0.04em;
}

.article-hero .lead {
  margin-top: 1.5rem;
  color: var(--color-text-muted);
  font-size: clamp(1rem, 2vw, 1.2rem);
  line-height: 1.85;
}

/* 正文排版 */
.article-body,
.prose {
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.9;
}

.article-body > *,
.prose > * {
  max-width: 100%;
}

.article-body h2,
.prose h2 {
  margin: 3.8rem 0 1.2rem;
  padding: 0.8rem 0 0.8rem 1rem;
  border-top: 1px solid var(--color-border);
  border-left: 0.28rem solid var(--color-error);
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 4vw, 2.25rem);
  line-height: 1.25;
}

.article-body h3,
.prose h3 {
  margin: 2.4rem 0 0.9rem;
  color: var(--color-accent);
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 3vw, 1.55rem);
}

.article-body p,
.prose p {
  margin: 1rem 0;
}

.article-body ul,
.article-body ol,
.prose ul,
.prose ol {
  margin: 1.2rem 0;
  padding-left: 1.6rem;
}

.article-body li,
.prose li {
  margin: 0.55rem 0;
  padding-left: 0.3rem;
}

.article-body a,
.prose a {
  color: var(--color-accent);
  text-decoration-color: var(--color-accent-dark);
  text-underline-offset: 0.2em;
}

.article-body code,
.prose code {
  padding: 0.15em 0.35em;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xs);
  color: var(--color-accent);
  background: var(--color-bg-panel);
  font-family: var(--font-mono);
  font-size: 0.9em;
}

.article-body pre,
.prose pre {
  overflow-x: auto;
  margin: 1.5rem 0;
  padding: 1.25rem;
  border: 1px solid var(--color-border);
  border-left: 0.3rem solid var(--color-accent-dark);
  border-radius: var(--radius-none);
  color: var(--color-text);
  background: var(--color-bg-panel);
  box-shadow: inset 0 0 2rem var(--color-shadow-deep);
}

.article-body pre code,
.prose pre code {
  padding: 0;
  border: 0;
  color: inherit;
  background: none;
}

.article-body blockquote,
.prose blockquote {
  margin: 1.8rem 0;
  padding: 1rem 1.25rem;
  border: 1px solid var(--color-border);
  border-left: 0.3rem solid var(--color-error);
  color: var(--color-text-muted);
  background: var(--color-bg-panel-2);
}

.article-body blockquote p,
.prose blockquote p {
  margin: 0;
}

.article-body .table-wrap,
.prose .table-wrap {
  overflow-x: auto;
  margin: 1.5rem 0;
  border: 1px solid var(--color-border);
}

.article-body .data-table,
.prose .data-table {
  width: 100%;
  min-width: 36rem;
  border-collapse: collapse;
}

.article-body .data-table th,
.article-body .data-table td,
.prose .data-table th,
.prose .data-table td {
  padding: 0.8rem 1rem;
  border: 1px solid var(--color-border);
  text-align: left;
  vertical-align: top;
}

.article-body .data-table th,
.prose .data-table th {
  color: var(--color-accent);
  background: var(--color-bg-panel);
  font-family: var(--font-mono);
}

/* 文末下载引导 */
.article-download {
  position: relative;
  margin-top: 4rem;
  padding: clamp(1.4rem, 4vw, 2.5rem);
  border: 1px solid var(--color-border);
  border-left: 0.4rem solid var(--color-error);
  border-radius: var(--radius-none);
  background:
    linear-gradient(90deg, var(--color-accent-soft), var(--color-black-soft)),
    var(--color-bg-panel);
  box-shadow:
    inset 0 1px var(--color-white-glint),
    0 1.5rem 3rem var(--color-shadow);
}

.article-download::after {
  position: absolute;
  top: 0.7rem;
  right: 0.7rem;
  width: 0.55rem;
  height: 0.55rem;
  content: "";
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-accent-dark);
}

.article-download h2 {
  margin: 0.35rem 0 0.8rem;
  padding: 0;
  border: 0;
}

.article-download p {
  max-width: 48rem;
  color: var(--color-text-muted);
}

/* 延伸阅读 */
#related-posts {
  max-width: var(--page-width);
  margin: var(--section-space) auto 0;
  padding: 0 var(--gutter);
}

#related-posts > h2 {
  margin: 0.3rem 0 1.4rem;
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 4vw, 2.6rem);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--color-border);
  border-left: 1px solid var(--color-border);
}

.related-card {
  min-width: 0;
  padding: 1.4rem;
  border-right: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  border-radius: var(--radius-none);
  background: var(--color-bg-panel);
  box-shadow: inset 0 1px var(--color-white-glint);
}

.related-card h3 {
  margin: 1rem 0 0.75rem;
  font-family: var(--font-display);
  font-size: 1.15rem;
  line-height: 1.45;
}

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

.related-card h3 a:hover {
  color: var(--color-accent);
}

.related-card p {
  margin: 0;
  color: var(--color-text-muted);
  line-height: 1.75;
}

/* 上一篇与下一篇 */
#post-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  max-width: var(--page-width);
  margin: 2rem auto var(--section-space);
  padding: 0 var(--gutter);
}

.post-nav-link {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  min-width: 0;
  padding: 1.25rem;
  border: 1px solid var(--color-border);
  color: var(--color-text);
  background: var(--color-bg-panel-2);
  text-decoration: none;
}

.post-nav-link + .post-nav-link {
  margin-left: -1px;
  text-align: right;
}

.post-nav-link:hover,
.post-nav-link:focus-visible {
  position: relative;
  z-index: 1;
  border-color: var(--color-accent);
  background: var(--color-bg-panel);
}

.post-nav-direction {
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
}

.post-nav-link strong {
  font-family: var(--font-display);
  line-height: 1.45;
}

/* 文章页右下角下载入口 */
.dl-fab {
  position: fixed;
  right: max(1rem, var(--gutter));
  bottom: 1rem;
  z-index: 20;
  display: inline-flex;
  gap: 0.65rem;
  align-items: center;
  min-height: var(--control-height);
  padding: 0.65rem 1rem;
  border: 1px solid var(--color-accent-dark);
  color: var(--color-bg);
  background: var(--color-accent);
  box-shadow:
    inset 0 -0.3rem var(--color-accent-dark),
    0 0.8rem 2rem var(--color-shadow-deep);
  font-family: var(--font-body);
  font-weight: 700;
  text-decoration: none;
}

.dl-fab:hover,
.dl-fab:focus-visible {
  color: var(--color-text);
  background: var(--color-error);
}

.dl-fab-icon {
  display: inline-flex;
  width: 1.2rem;
  height: 1.2rem;
}

.dl-fab-icon svg {
  width: 100%;
  height: 100%;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: square;
  stroke-linejoin: miter;
}

@media (max-width: 980px) {
  .post-card {
    grid-template-columns: minmax(8rem, 0.28fr) minmax(0, 1fr) auto;
  }

  .post-summary {
    grid-column: 2 / -1;
  }

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

@media (max-width: 700px) {
  .blog-control-head {
    align-items: flex-start;
    flex-direction: column;
  }

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

  .blog-filter {
    width: 100%;
  }

  .post-card {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

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

  .post-read-link {
    justify-self: start;
  }

  #post-nav {
    grid-template-columns: 1fr;
  }

  .post-nav-link + .post-nav-link {
    margin-top: -1px;
    margin-left: 0;
    text-align: left;
  }

  .dl-fab {
    right: 0.75rem;
    bottom: 0.75rem;
  }
}

@media (max-width: 420px) {
  .blog-filter-list {
    grid-template-columns: 1fr;
  }

  .article-hero h1 {
    overflow-wrap: anywhere;
  }

  .dl-fab span:last-child {
    display: none;
  }

  .dl-fab {
    justify-content: center;
    width: var(--control-height);
    padding-right: 0;
    padding-left: 0;
  }
}