/* ============================================================
   C6VPN · 博客样式包
   列表页(blog/index.html)与文章页(blog/articles/*.html)共用
   颜色 / 字体 / 圆角一律引用 base.css 的 :root 令牌
   ============================================================ */

:root {
  --read-col: 55rem;
  --read-pad: max(var(--gutter), 1.5rem);
  --read-box: calc(var(--read-col) + 2 * var(--read-pad));
}

/* ---------- 面包屑 ---------- */

.breadcrumbs {
  width: 100%;
  max-width: var(--read-box);
  margin-inline: auto;
  padding: 1.4rem var(--read-pad) 0;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  color: var(--text-muted);
}

.breadcrumbs ol,
.breadcrumbs ul {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumbs li {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  min-width: 0;
}

.breadcrumbs li + li::before {
  content: "/";
  color: color-mix(in srgb, var(--border) 65%, var(--text-muted));
}

.breadcrumbs a {
  color: var(--text-muted);
  text-decoration: none;
  overflow-wrap: anywhere;
}

.breadcrumbs a:hover {
  color: var(--accent-dark);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.breadcrumbs [aria-current="page"] {
  color: var(--text);
  overflow-wrap: anywhere;
}

.breadcrumbs--list {
  max-width: 100%;
  padding-inline: 0;
}

/* ---------- 列表页 Hero(side-rule-card) ---------- */

.blog-hero {
  position: relative;
  margin-top: 1.1rem;
  padding: 1.55rem 1.6rem 1.6rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.blog-hero::before {
  content: "";
  position: absolute;
  inset-block: 1rem;
  inset-inline-start: 0.55rem;
  width: 6px;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--accent) 0%, var(--prism-mid) 58%, var(--peach) 100%);
}

.blog-hero::after {
  content: "";
  position: absolute;
  inset-block-start: -3.5rem;
  inset-inline-end: -2.5rem;
  width: 12rem;
  height: 12rem;
  border-radius: 50%;
  background: radial-gradient(circle at 38% 38%, color-mix(in srgb, var(--peach) 58%, transparent), transparent 70%);
  pointer-events: none;
}

.blog-hero > * {
  position: relative;
  z-index: 1;
}

.blog-hero h1 {
  margin: 0.55rem 0 0.7rem;
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3.4vw, 2.75rem);
  line-height: 1.24;
  letter-spacing: -0.015em;
  text-wrap: pretty;
  color: var(--text);
}

.blog-hero .sec-lead {
  max-width: 44rem;
  margin: 0;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-muted);
}

.hero-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1.1rem 0 0;
  padding: 0;
  list-style: none;
}

.hero-links a.chip {
  text-decoration: none;
}

.hero-links a.chip:hover {
  color: var(--accent-dark);
  border-color: color-mix(in srgb, var(--accent) 50%, var(--border));
}

/* ---------- 列表区与筛选 ---------- */

.blog-list {
  margin-top: 2rem;
}

.list-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 2vw, 1.5rem);
  line-height: 1.4;
  letter-spacing: -0.008em;
  text-wrap: pretty;
  color: var(--text);
}

.tag-filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

.tag-filter {
  min-height: 2.4rem;
  padding: 0.45rem 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r-xs);
  cursor: pointer;
  transition: color 0.16s ease, background-color 0.16s ease, border-color 0.16s ease;
}

.tag-filter:hover {
  color: var(--accent-dark);
  border-color: color-mix(in srgb, var(--accent) 45%, var(--border));
}

.tag-filter[aria-pressed="true"] {
  color: var(--bg-panel);
  background: var(--accent);
  border-color: var(--accent);
}

.post-count {
  margin: 0.9rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  color: var(--text-muted);
}

.post-empty {
  margin: 1.2rem 0 0;
  padding: 1.4rem 1.2rem;
  color: var(--text-muted);
  background: var(--bg-panel-2);
  border: 1px dashed var(--border);
  border-radius: var(--r-md);
}

/* ---------- 文章卡 ---------- */

.post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 19rem), 1fr));
  gap: 1.1rem;
  margin-top: 1.4rem;
}

.post-card {
  display: flex;
  flex-direction: column;
  padding: 1.15rem 1.15rem 1.2rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-soft);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.post-card:hover {
  transform: translateY(-3px);
  border-color: color-mix(in srgb, var(--accent) 35%, var(--border));
  box-shadow: var(--shadow-card);
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.7rem;
}

.post-tag {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  color: var(--bg-panel);
  background: var(--accent);
  border-radius: var(--r-xs);
}

.post-date {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.03em;
  color: var(--text-muted);
}

.post-title {
  margin: 0 0 0.55rem;
  font-family: var(--font-display);
  font-size: 1.08rem;
  line-height: 1.5;
  letter-spacing: -0.005em;
  text-wrap: pretty;
}

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

.post-title a:hover {
  color: var(--accent-dark);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.post-summary {
  margin: 0 0 1rem;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--text-muted);
}

.post-more {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: auto;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--accent-dark);
  text-decoration: none;
}

.post-more::after {
  content: "→";
  transition: transform 0.18s ease;
}

.post-more:hover {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.post-more:hover::after {
  transform: translateX(3px);
}

/* ---------- 文末推广卡 ---------- */

.promo-block {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem 1.5rem;
  width: 100%;
  max-width: var(--read-box);
  margin: 2.2rem auto 0;
  padding: 1.4rem var(--read-pad);
  color: var(--bg-panel);
  background: linear-gradient(135deg, var(--accent-dark) 0%, var(--accent) 58%, var(--prism-mid) 100%);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-card);
}

.promo-block--wide {
  max-width: 100%;
  padding-inline: 1.6rem;
}

.promo-brand {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  color: color-mix(in srgb, var(--bg-panel) 78%, var(--prism-top-a));
}

.promo-text {
  margin: 0.35rem 0 0;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--bg-panel);
}

.promo-block .btn-primary {
  flex-shrink: 0;
  white-space: nowrap;
  color: var(--accent-dark);
  background: var(--bg-panel);
  box-shadow: var(--shadow-soft);
}

.promo-block .btn-primary:hover {
  color: var(--accent-dark);
  background: var(--peach-soft);
}

/* ---------- 文章 Hero ---------- */

.article-hero {
  position: relative;
  width: 100%;
  max-width: var(--read-box);
  margin: 1.2rem auto 0;
  padding: 1.6rem var(--read-pad) 1.7rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.article-hero::before {
  content: "";
  position: absolute;
  inset-block: 1rem;
  inset-inline-start: 0.55rem;
  width: 6px;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--accent) 0%, var(--prism-mid) 55%, var(--peach) 100%);
}

.article-hero > * {
  position: relative;
}

.article-hero h1 {
  margin: 0.6rem 0 0.7rem;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.5rem);
  line-height: 1.28;
  letter-spacing: -0.012em;
  text-wrap: pretty;
  color: var(--text);
}

.article-hero .sec-lead,
.article-hero .article-summary {
  margin: 0;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-muted);
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  margin: 0 0 0.85rem;
  padding: 0;
  list-style: none;
}

.article-meta > * {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.26rem 0.65rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.03em;
  color: var(--text-muted);
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 999px;
  white-space: nowrap;
}

.article-meta .post-tag,
.article-meta .meta-tag,
.article-hero .post-tag {
  color: var(--bg-panel);
  background: var(--accent);
  border-color: var(--accent);
}

/* ---------- 正文阅读列 ---------- */

.reading-wrap {
  width: 100%;
  max-width: var(--read-box);
  margin-inline: auto;
  padding: 1.6rem var(--read-pad) 0;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.85;
  color: var(--text);
  counter-reset: sec;
  overflow-wrap: break-word;
}

.reading-wrap > :first-child {
  margin-top: 0;
}

.reading-wrap p {
  margin: 0 0 1.05rem;
}

.reading-wrap a {
  color: var(--accent-dark);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.reading-wrap a:hover {
  color: var(--accent);
}

.reading-wrap strong {
  font-weight: 700;
  color: var(--text);
}

.reading-wrap h2 {
  counter-increment: sec;
  margin: 2.1rem 0 0.85rem;
  padding-top: 0.85rem;
  border-top: 1px solid var(--border);
  font-family: var(--font-display);
  font-size: clamp(1.22rem, 2vw, 1.6rem);
  line-height: 1.42;
  letter-spacing: -0.008em;
  text-wrap: pretty;
  color: var(--text);
}

.reading-wrap h2::before {
  content: counter(sec, decimal-leading-zero);
  display: inline-block;
  margin-right: 0.55rem;
  padding: 0.06rem 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.66em;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--accent-dark);
  background: color-mix(in srgb, var(--accent) 12%, var(--bg-panel));
  border: 1px solid color-mix(in srgb, var(--accent) 26%, var(--border));
  border-radius: var(--r-xs);
  vertical-align: middle;
}

.reading-wrap > h2:first-child {
  padding-top: 0;
  border-top: 0;
}

.reading-wrap h3 {
  margin: 1.6rem 0 0.55rem;
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 1.5vw, 1.3rem);
  line-height: 1.5;
  letter-spacing: -0.006em;
  text-wrap: pretty;
  color: var(--text);
}

.reading-wrap h3::before {
  content: "";
  display: inline-block;
  width: 0.4rem;
  height: 0.4rem;
  margin-right: 0.45rem;
  border-radius: 50%;
  background: var(--accent);
  vertical-align: middle;
}

.reading-wrap ul,
.reading-wrap ol {
  margin: 0 0 1.1rem;
  padding-left: 1.35rem;
}

.reading-wrap li {
  margin-bottom: 0.45rem;
}

.reading-wrap li::marker {
  color: var(--accent);
}

.reading-wrap blockquote {
  margin: 1.3rem 0;
  padding: 0.9rem 1.1rem;
  color: var(--text-muted);
  background: var(--bg-panel-2);
  border-inline-start: 3px solid var(--prism-mid);
  border-radius: var(--r-sm);
}

.reading-wrap blockquote p:last-child {
  margin-bottom: 0;
}

.reading-wrap hr {
  height: 1px;
  margin: 2rem 0;
  border: 0;
  background: var(--border);
}

.reading-wrap img {
  max-width: 100%;
  height: auto;
  border-radius: var(--r-md);
  border: 1px solid var(--border);
}

/* ---------- 正文表格 ---------- */

.reading-wrap table {
  width: 100%;
  margin: 1.2rem 0 1.5rem;
  font-size: 0.94rem;
  line-height: 1.65;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-collapse: collapse;
  border-radius: var(--r-sm);
  overflow: hidden;
}

.reading-wrap thead th {
  padding: 0.65rem 0.8rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-align: left;
  color: var(--bg-panel);
  background: var(--accent-dark);
  border-bottom: 1px solid var(--accent-dark);
}

.reading-wrap tbody td {
  padding: 0.6rem 0.8rem;
  vertical-align: top;
  border-top: 1px solid var(--border);
}

.reading-wrap tbody tr:nth-child(even) {
  background: color-mix(in srgb, var(--bg-panel-2) 55%, var(--bg-panel));
}

.reading-wrap tbody tr:hover {
  background: color-mix(in srgb, var(--accent) 9%, var(--bg-panel));
}

.reading-wrap .table-scroll {
  margin: 1.2rem 0 1.5rem;
  max-width: 100%;
  overflow-x: auto;
}

.reading-wrap .table-scroll table {
  margin: 0;
}

/* ---------- 终端窗代码块 ---------- */

.reading-wrap pre {
  position: relative;
  margin: 1.2rem 0 1.5rem;
  padding: 2.35rem 1.1rem 1.1rem;
  font-size: 0.86rem;
  line-height: 1.7;
  color: var(--bg-panel);
  background: var(--text);
  border: 1px solid var(--accent-dark);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-dark);
  overflow-x: auto;
}

.reading-wrap pre::before {
  content: "";
  position: absolute;
  inset-block-start: 0.9rem;
  inset-inline-start: 1.1rem;
  width: 2.4rem;
  height: 0.5rem;
  background-image:
    radial-gradient(circle at 0.25rem 50%, var(--error) 0 0.2rem, transparent 0.21rem),
    radial-gradient(circle at 1.2rem 50%, var(--warn) 0 0.2rem, transparent 0.21rem),
    radial-gradient(circle at 2.15rem 50%, var(--success) 0 0.2rem, transparent 0.21rem);
  background-repeat: no-repeat;
}

.reading-wrap pre code {
  display: block;
  padding: 0;
  font-family: var(--font-mono);
  font-size: inherit;
  line-height: inherit;
  color: inherit;
  background: none;
  border: 0;
  white-space: pre;
  overflow-wrap: normal;
}

.reading-wrap :not(pre) > code {
  padding: 0.12rem 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.88em;
  color: var(--accent-dark);
  background: color-mix(in srgb, var(--accent) 10%, var(--bg-panel));
  border: 1px solid color-mix(in srgb, var(--accent) 22%, var(--border));
  border-radius: var(--r-xs);
}

/* ---------- 提示块 ---------- */

.callout {
  position: relative;
  margin: 1.3rem 0;
  padding: 1rem 1.1rem;
  background: color-mix(in srgb, var(--accent) 8%, var(--bg-panel));
  border: 1px solid color-mix(in srgb, var(--accent) 22%, var(--border));
  border-inline-start: 4px solid var(--accent);
  border-radius: var(--r-sm);
}

.callout-title {
  display: block;
  margin-bottom: 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  color: var(--accent-dark);
}

.callout-title::before {
  content: "i";
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.1rem;
  height: 1.1rem;
  margin-right: 0.4rem;
  font-size: 0.7rem;
  line-height: 1;
  color: var(--bg-panel);
  background: var(--accent);
  border-radius: 50%;
  vertical-align: -0.15em;
}

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

.callout--warn {
  background: color-mix(in srgb, var(--warn) 12%, var(--bg-panel));
  border-color: color-mix(in srgb, var(--warn) 32%, var(--border));
  border-inline-start-color: var(--warn);
}

.callout--warn .callout-title {
  color: color-mix(in srgb, var(--warn) 72%, var(--text));
}

.callout--warn .callout-title::before {
  content: "!";
  background: var(--warn);
}

.callout--success,
.callout--ok {
  background: color-mix(in srgb, var(--success) 11%, var(--bg-panel));
  border-color: color-mix(in srgb, var(--success) 30%, var(--border));
  border-inline-start-color: var(--success);
}

.callout--success .callout-title,
.callout--ok .callout-title {
  color: color-mix(in srgb, var(--success) 70%, var(--text));
}

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

/* ---------- 数据卡 ---------- */

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 10.5rem), 1fr));
  gap: 0.9rem;
  margin: 1.4rem 0 1.6rem;
}

.stat-card {
  position: relative;
  padding: 1.2rem 1rem 0.95rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
}

.stat-card::before {
  content: "";
  position: absolute;
  inset-block-start: 0;
  inset-inline: 0;
  height: 6px;
  background: var(--accent);
}

.stat-card:nth-child(2n) {
  background: color-mix(in srgb, var(--candy-sky) 26%, var(--bg-panel));
}

.stat-card:nth-child(2n)::before {
  background: var(--candy-bar);
}

.stat-card:nth-child(3n) {
  background: color-mix(in srgb, var(--candy-apricot) 30%, var(--bg-panel));
}

.stat-card:nth-child(3n)::before {
  background: var(--peach);
}

.stat-num {
  margin: 0 0 0.25rem;
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 2.6vw, 1.9rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--accent-dark);
}

.stat-label {
  margin: 0;
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--text-muted);
}

/* ---------- 勾叉清单(标记只写在 li 文本里) ---------- */

.check-list {
  display: grid;
  gap: 0.5rem;
  margin: 1.1rem 0 1.3rem;
  padding: 0;
  list-style: none;
}

.reading-wrap .check-list {
  padding-left: 0;
}

.check-list li {
  margin: 0;
  padding: 0.6rem 0.85rem;
  font-size: 0.96rem;
  line-height: 1.7;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-inline-start: 3px solid color-mix(in srgb, var(--accent) 45%, var(--border));
  border-radius: var(--r-sm);
}

.check-list li::before,
.check-list li::marker {
  content: none;
}

/* ---------- 结论块 ---------- */

.verdict {
  margin: 1.4rem 0;
  padding: 1rem 1.1rem;
  font-size: 0.98rem;
  line-height: 1.8;
  background: color-mix(in srgb, var(--accent) 9%, var(--bg-panel));
  border: 1px solid color-mix(in srgb, var(--accent) 24%, var(--border));
  border-inline-start: 4px solid var(--accent-dark);
  border-radius: var(--r-sm);
}

.verdict strong {
  color: var(--accent-dark);
}

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

/* ---------- 延伸阅读 ---------- */

.related,
#related-posts {
  width: 100%;
  max-width: var(--read-box);
  margin-inline: auto;
  padding: 2rem var(--read-pad) 0;
}

.related-heading {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 1.8vw, 1.4rem);
  line-height: 1.4;
  letter-spacing: -0.008em;
  text-wrap: pretty;
  color: var(--text);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr));
  gap: 0.9rem;
}

.related-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  padding: 1rem 1rem 1.05rem;
  color: var(--text);
  text-decoration: none;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  overflow: hidden;
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}

.related-card::before {
  content: "";
  position: absolute;
  inset-block-start: 0;
  inset-inline: 1rem;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.2s ease;
}

.related-card:hover {
  transform: translateY(-2px);
  border-color: color-mix(in srgb, var(--accent) 45%, var(--border));
  box-shadow: var(--shadow-soft);
}

.related-card:hover::before {
  transform: scaleX(1);
}

.related-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  color: var(--accent-dark);
}

.related-title {
  font-size: 0.98rem;
  font-weight: 600;
  line-height: 1.55;
}

.related-date {
  margin-top: auto;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.03em;
  color: var(--text-muted);
}

/* ---------- 上一篇 / 下一篇 ---------- */

#post-nav,
.post-nav {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 16rem), 1fr));
  gap: 0.9rem;
  width: 100%;
  max-width: var(--read-box);
  margin-inline: auto;
  padding: 1.2rem var(--read-pad) 1.5rem;
}

.post-nav-link {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 0.95rem 1rem;
  color: var(--text);
  text-decoration: none;
  background: var(--bg-panel-2);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  transition: transform 0.18s ease, border-color 0.18s ease, background-color 0.18s ease;
}

.post-nav-link:hover {
  transform: translateY(-2px);
  background: var(--bg-panel);
  border-color: color-mix(in srgb, var(--accent) 45%, var(--border));
}

.post-nav-key {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.post-nav-title {
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.55;
}

.post-nav-next {
  align-items: flex-end;
  text-align: right;
}

/* ---------- 空挂载点不占位 ---------- */

#related-posts:empty,
#post-nav:empty {
  display: none;
}

/* ---------- 窄屏 ---------- */

@media (max-width: 860px) {
  .reading-wrap table {
    display: block;
    width: fit-content;
    max-width: 100%;
    overflow-x: auto;
  }
}

@media (max-width: 820px) {
  .blog-hero {
    padding: 1.3rem 1.5rem 1.35rem;
  }

  .article-hero {
    padding: 1.3rem 1.5rem 1.4rem;
  }

  .blog-hero::before,
  .article-hero::before {
    inset-inline-start: 0.42rem;
    width: 5px;
  }

  .promo-block {
    padding-inline: 1.5rem;
  }

  .related-title,
  .post-nav-title {
    font-size: 0.92rem;
  }
}

@media (max-width: 520px) {
  .post-grid,
  .related-grid {
    grid-template-columns: 1fr;
  }

  .post-nav-next {
    align-items: flex-start;
    text-align: left;
  }
}

/* ---------- 动效降级 ---------- */

@media (prefers-reduced-motion: reduce) {
  .post-card,
  .related-card,
  .post-nav-link,
  .tag-filter,
  .post-more::after,
  .related-card::before {
    transition: none;
  }

  .post-card:hover,
  .related-card:hover,
  .post-nav-link:hover {
    transform: none;
  }

  .related-card:hover::before {
    transform: scaleX(1);
  }

  .post-more:hover::after {
    transform: none;
  }
}