/* ==========================================================================
   VPNYF · 博客样式（列表页 + 文章页）
   仅由 zh-CN/blog/ 与 zh-CN/blog/articles/ 引用
   颜色、圆角、阴影一律取自 base.css 的 :root 令牌，本文件不写死色值
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. 阅读列：面包屑 / 文章 hero / 正文 / 文末推广 / 延伸阅读共用同一条列
   显式覆盖 base.css 的 --content-reading，避免正文列被卡死在 820px
   -------------------------------------------------------------------------- */
.reading-wrap {
  width: 100%;
  max-width: calc(56rem + 3rem);
  margin-inline: auto;
  padding-inline: max(var(--gutter), 1.5rem);
  box-sizing: border-box;
}

/* --------------------------------------------------------------------------
   2. 列表页 hero
   -------------------------------------------------------------------------- */
.blog-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(2rem, 4.6vw, 3.4rem) clamp(1.5rem, 3vw, 2.2rem);
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%);
  border-bottom: 1px solid var(--border-soft);
}

.blog-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(var(--dot) 1px, var(--dot-0) 1px);
  background-size: 22px 22px;
  opacity: 0.55;
  pointer-events: none;
}

.blog-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(72% 84% at 50% 0%, var(--glow-cool), var(--glow-cool-0) 72%);
  pointer-events: none;
}

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

.blog-hero h1 {
  margin: 0.9rem 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.9rem, 4.2vw, 3rem);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--text);
  text-wrap: pretty;
}

.blog-hero .lead {
  margin: 1rem 0 0;
  max-width: 46rem;
  font-size: 1.02rem;
  line-height: 1.78;
  color: var(--text-muted);
}

.blog-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1.4rem 0 0;
  padding: 0;
  list-style: none;
}

.blog-facts li {
  display: inline-flex;
  align-items: baseline;
  gap: 0.3rem;
  padding: 0.34rem 0.8rem;
  border-radius: var(--r-pill);
  background: var(--bg-panel);
  border: 1px solid var(--border);
  font-size: 0.82rem;
  color: var(--text-muted);
}

.blog-facts b {
  font-family: var(--font-mono);
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text);
}

/* --------------------------------------------------------------------------
   3. 列表页：标题行、标签筛选、文章卡
   -------------------------------------------------------------------------- */
.blog-list-sec {
  position: relative;
}

.list-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.4rem 1rem;
  margin-bottom: 1.1rem;
}

.list-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2vw, 1.35rem);
  font-weight: 800;
  color: var(--text);
  text-wrap: pretty;
}

.list-count {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-faint);
}

.tag-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.tag-btn {
  appearance: none;
  -webkit-appearance: none;
  cursor: pointer;
  min-height: 40px;
  padding: 0.45rem 1.05rem;
  border-radius: var(--r-pill);
  border: 1px solid var(--border);
  background: var(--bg-panel);
  color: var(--text-muted);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  line-height: 1.2;
  transition: color 0.16s ease, border-color 0.16s ease, background-color 0.16s ease, box-shadow 0.16s ease;
}

.tag-btn:hover {
  color: var(--text);
  border-color: var(--accent-line);
  background: var(--accent-wash);
}

.tag-btn.is-active {
  background: var(--text);
  border-color: var(--text);
  color: var(--on-dark);
  box-shadow: var(--shadow-pill);
}

.tag-btn.is-active:hover {
  background: var(--btn-a);
  border-color: var(--btn-a);
  color: var(--on-dark);
}

.post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr));
  gap: 1.1rem;
}

.post-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  padding: 1.35rem 1.35rem 1.15rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-card);
  color: inherit;
  text-decoration: none;
  overflow: hidden;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.post-card::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-line));
  opacity: 0;
  transition: opacity 0.18s ease;
}

.post-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent-line);
  box-shadow: var(--shadow-float);
}

.post-card:hover::before {
  opacity: 1;
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.65rem;
}

.tag-chip {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.62rem;
  border-radius: var(--r-pill);
  background: var(--accent-wash);
  border: 1px solid var(--accent-line);
  color: var(--accent-dark);
  font-size: 0.76rem;
  font-weight: 700;
  line-height: 1.5;
  white-space: nowrap;
}

.post-date {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-faint);
}

.post-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--text);
  text-wrap: pretty;
}

.post-excerpt {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.72;
  color: var(--text-muted);
}

.post-more {
  margin-top: auto;
  padding-top: 0.35rem;
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--accent-dark);
}

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

.list-empty {
  margin: 1.2rem 0 0;
  padding: 1.4rem;
  text-align: center;
  border: 1px dashed var(--border);
  border-radius: var(--r-md);
  background: var(--bg-panel-3);
  color: var(--text-muted);
}

.list-empty a {
  color: var(--accent-dark);
  font-weight: 700;
}

/* --------------------------------------------------------------------------
   4. 面包屑：与页头留出呼吸空间，不贴 header 底边
   -------------------------------------------------------------------------- */
.crumbs {
  margin-top: 1.4rem;
  margin-bottom: 1.1rem;
  font-size: 0.82rem;
  color: var(--text-faint);
}

.crumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.crumbs li {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.crumbs li + li::before {
  content: "/";
  color: var(--border);
}

.crumbs a {
  color: var(--text-muted);
  text-decoration: none;
}

.crumbs a:hover {
  color: var(--accent-dark);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.crumbs [aria-current="page"] {
  color: var(--text);
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   5. 文章 hero：split-meta（左 3/4 标题摘要 + 右 1/4 竖排 meta 小卡）
   -------------------------------------------------------------------------- */
.article-hero {
  position: relative;
  overflow: hidden;
  padding-block: 0.2rem clamp(1.2rem, 2.4vw, 1.8rem);
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 90%);
  border-bottom: 1px solid var(--border-soft);
}

.article-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(var(--dot) 1px, var(--dot-0) 1px);
  background-size: 22px 22px;
  opacity: 0.45;
  pointer-events: none;
}

.article-hero .reading-wrap {
  position: relative;
  z-index: 1;
}

.article-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 1fr);
  gap: 2.4rem;
  align-items: start;
}

.article-hero-main {
  min-width: 0;
}

.article-hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.65rem, 3.1vw, 2.6rem);
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--text);
  text-wrap: pretty;
}

.article-lead {
  margin: 0.9rem 0 0;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-muted);
}

.article-meta-card {
  display: grid;
  padding: 0.35rem 1.05rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-card);
}

.meta-row {
  display: block;
  padding-block: 0.62rem;
  border-bottom: 1px solid var(--border-soft);
}

.meta-row:last-child {
  border-bottom: 0;
}

.meta-k {
  display: block;
  margin-bottom: 0.15rem;
  font-size: 0.72rem;
  color: var(--text-faint);
  letter-spacing: 0.02em;
}

.meta-v {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text);
}

.meta-v.mono {
  font-family: var(--font-mono);
  font-weight: 500;
}

/* --------------------------------------------------------------------------
   6. 正文排版：阅读尺寸克制，h2 带编号、h3 带短标线
   -------------------------------------------------------------------------- */
.post-body {
  max-width: 100%;
  margin-inline: auto;
  padding-block: clamp(1.2rem, 2.4vw, 1.8rem) 0;
}

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

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

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

.prose p {
  margin-block: 1.05rem;
}

.prose h2 {
  counter-increment: sec;
  margin-block: 2.3rem 0.85rem;
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 2.1vw, 1.6rem);
  font-weight: 800;
  line-height: 1.4;
  letter-spacing: -0.005em;
  color: var(--text);
  text-wrap: pretty;
}

.prose h2::before {
  content: counter(sec, decimal-leading-zero);
  display: inline-block;
  margin-right: 0.55rem;
  padding: 0.06rem 0.42rem;
  border-radius: var(--r-xs);
  background: var(--accent-wash);
  border: 1px solid var(--accent-line);
  color: var(--accent-dark);
  font-family: var(--font-mono);
  font-size: 0.7em;
  font-weight: 600;
  letter-spacing: 0;
  vertical-align: 0.12em;
}

.prose h3 {
  margin-block: 1.7rem 0.6rem;
  font-family: var(--font-display);
  font-size: clamp(1.08rem, 1.6vw, 1.3rem);
  font-weight: 700;
  line-height: 1.5;
  color: var(--text);
  text-wrap: pretty;
}

.prose h3::before {
  content: "";
  display: inline-block;
  width: 0.35rem;
  height: 0.95rem;
  margin-right: 0.5rem;
  border-radius: var(--r-pill);
  background: var(--accent);
  vertical-align: -0.08em;
}

.prose h4 {
  margin-block: 1.3rem 0.5rem;
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
}

.prose ul,
.prose ol {
  margin-block: 1.05rem;
  padding-left: 1.4rem;
}

.prose li {
  margin-block: 0.4rem;
}

.prose li > ul,
.prose li > ol {
  margin-block: 0.3rem;
}

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

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

.prose a {
  color: var(--accent-dark);
  text-decoration: underline;
  text-decoration-color: var(--accent-line);
  text-underline-offset: 0.18em;
}

.prose a:hover {
  text-decoration-color: var(--accent);
}

.prose hr {
  margin-block: 2rem;
  border: 0;
  border-top: 1px solid var(--border);
}

.prose blockquote {
  margin-block: 1.6rem;
  padding: 0.9rem 1.2rem;
  border-left: 3px solid var(--border);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  background: var(--bg-panel-3);
  color: var(--text-muted);
}

.prose blockquote p {
  margin-block: 0.35rem;
}

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

.prose figure {
  margin-block: 1.6rem;
}

.prose figcaption {
  margin-top: 0.5rem;
  font-size: 0.82rem;
  color: var(--text-faint);
  text-align: center;
}

/* 行内代码 */
.prose :not(pre) > code {
  padding: 0.12em 0.42em;
  border-radius: var(--r-xs);
  background: var(--bg-panel-2);
  border: 1px solid var(--border-soft);
  color: var(--accent-dark);
  font-family: var(--font-mono);
  font-size: 0.88em;
  overflow-wrap: anywhere;
}

/* 终端风代码块 */
.prose pre {
  position: relative;
  margin-block: 1.5rem;
  padding: 2.35rem 1.1rem 1.05rem;
  background: var(--text);
  color: var(--on-dark);
  border: 1px solid var(--btn-a);
  border-radius: var(--r-md);
  font-family: var(--font-mono);
  font-size: 0.86rem;
  line-height: 1.7;
  overflow-x: auto;
  box-shadow: var(--shadow-card);
}

.prose pre::before {
  content: "";
  position: absolute;
  top: 0.85rem;
  left: 1.05rem;
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--error);
  box-shadow: 0.85rem 0 0 var(--accent), 1.7rem 0 0 var(--success);
}

.prose pre code {
  display: block;
  padding: 0;
  background: none;
  border: 0;
  color: inherit;
  font-family: inherit;
  font-size: inherit;
  white-space: pre;
  overflow-wrap: normal;
}

/* 表格：实色表头 + 斑马纹 + hover 行，窄屏横滑 */
.prose caption {
  caption-side: top;
  padding-block: 0.4rem;
  text-align: left;
  font-size: 0.82rem;
  color: var(--text-faint);
}

.prose table {
  width: 100%;
  margin-block: 1.6rem;
  border-collapse: collapse;
  border: 1px solid var(--border);
  font-size: 0.9rem;
  line-height: 1.65;
}

.prose thead th {
  padding: 0.7rem 0.8rem;
  background: var(--bg-panel-2);
  border-bottom: 1px solid var(--border);
  color: var(--text);
  font-weight: 700;
  text-align: left;
  white-space: nowrap;
}

.prose tbody td {
  padding: 0.65rem 0.8rem;
  border-bottom: 1px solid var(--border-soft);
  word-break: keep-all;
  vertical-align: top;
}

.prose tbody tr:nth-child(even) {
  background: var(--bg-panel-3);
}

.prose tbody tr:hover {
  background: var(--accent-wash);
}

.prose .table-scroll {
  max-width: 100%;
  margin-block: 1.6rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.prose .table-scroll table {
  margin-block: 0;
}

/* 提示块：左色条 + 图标徽 */
.prose .callout {
  position: relative;
  margin-block: 1.5rem;
  padding: 1rem 1.15rem 1rem 3.1rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: var(--r-md);
  line-height: 1.75;
}

.prose .callout::before {
  content: "!";
  position: absolute;
  left: 1rem;
  top: 1rem;
  display: grid;
  place-items: center;
  width: 1.4rem;
  height: 1.4rem;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent-dark);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  line-height: 1;
}

.prose .callout-note {
  border-left-color: var(--accent);
}

.prose .callout-warn {
  background: var(--warn-wash);
  border-color: var(--warn-line);
  border-left-color: var(--warn);
}

.prose .callout-warn::before {
  content: "!";
  background: var(--warn);
  color: var(--on-dark);
}

.prose .callout-ok {
  background: var(--success-wash);
  border-color: var(--success-line);
  border-left-color: var(--success);
}

.prose .callout-ok::before {
  content: "✓";
  background: var(--success);
  color: var(--on-dark);
}

.prose .callout > :first-child,
.prose .verdict > :first-child {
  margin-top: 0;
}

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

/* 数据卡网格：至少两档配色 */
.prose .stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 9.5rem), 1fr));
  gap: 0.85rem;
  margin-block: 1.6rem;
}

.prose .stat-card {
  padding: 0.95rem 1.05rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-top: 3px solid var(--accent);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-card);
}

.prose .stat-card:nth-child(2n) {
  background: var(--success-wash);
  border-color: var(--success-line);
  border-top-color: var(--success);
}

.prose .stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.45rem;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--text);
}

.prose .stat-label {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.82rem;
  line-height: 1.5;
  color: var(--text-muted);
}

/* 清单：只做容器与行卡装饰，勾叉由正文文本自带 */
.prose .check-list {
  display: grid;
  gap: 0.55rem;
  margin-block: 1.5rem;
  padding: 0;
  list-style: none;
}

.prose .check-list li {
  margin: 0;
  padding: 0.72rem 0.95rem;
  background: var(--bg-panel);
  border: 1px solid var(--border-soft);
  border-left: 3px solid var(--accent-line);
  border-radius: var(--r-sm);
  line-height: 1.72;
  list-style: none;
  transition: border-color 0.16s ease, background-color 0.16s ease;
}

.prose .check-list li::marker {
  content: "";
}

.prose .check-list li:hover {
  background: var(--bg-panel-3);
  border-left-color: var(--accent);
}

/* 结论块 */
.prose .verdict {
  margin-block: 1.6rem;
  padding: 1rem 1.15rem;
  background: var(--accent-wash);
  border-left: 4px solid var(--accent);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  line-height: 1.78;
}

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

/* --------------------------------------------------------------------------
   7. 文末推广卡：深墨底 + 蜜金柔光，彩底上按钮重配色
   -------------------------------------------------------------------------- */
.post-promo {
  position: relative;
  overflow: hidden;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.1rem 1.6rem;
  margin-block: clamp(2rem, 4vw, 2.8rem) 0;
  padding: 1.5rem 1.6rem;
  background: linear-gradient(135deg, var(--text) 0%, var(--btn-a) 58%, var(--focus) 100%);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  color: var(--on-dark);
  box-shadow: var(--shadow-float);
}

.post-promo::after {
  content: "";
  position: absolute;
  right: -8%;
  top: -40%;
  width: 46%;
  height: 180%;
  background: radial-gradient(closest-side, var(--glow-warm), var(--glow-warm-0));
  pointer-events: none;
}

.post-promo .promo-text {
  position: relative;
  z-index: 1;
  flex: 1 1 20rem;
  min-width: min(100%, 20rem);
}

.post-promo .promo-brand {
  margin: 0 0 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--accent-line);
}

.post-promo .promo-line {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.72;
  color: var(--on-dark);
}

.post-promo-actions {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.post-promo .btn-primary {
  background: var(--bg-panel);
  border: 1px solid var(--bg-panel);
  color: var(--text);
  box-shadow: var(--shadow-btn);
}

.post-promo .btn-primary:hover {
  background: var(--accent-wash);
  border-color: var(--accent-wash);
  color: var(--accent-dark);
}

.post-promo .btn-ghost {
  background: none;
  border: 1px solid var(--on-dark-line);
  color: var(--on-dark);
}

.post-promo .btn-ghost:hover {
  border-color: var(--accent-line);
  color: var(--accent-wash);
  background: none;
}

/* --------------------------------------------------------------------------
   8. 延伸阅读 / 上一篇下一篇
   两者上下垫距之和控制在 5rem 以内，避免页尾空洞
   -------------------------------------------------------------------------- */
#related-posts {
  padding-block: 2.2rem 0;
}

#related-posts:empty {
  display: none;
}

#post-nav {
  padding-block: 1.8rem 1.2rem;
}

#post-nav:empty {
  display: none;
}

.related-head {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 1.8vw, 1.25rem);
  font-weight: 800;
  color: var(--text);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 14rem), 1fr));
  gap: 0.9rem;
}

.related-card {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  padding: 1.05rem 1.1rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-card);
  color: inherit;
  text-decoration: none;
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}

.related-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent-line);
  box-shadow: inset 0 3px 0 var(--accent), var(--shadow-card);
}

.related-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 0.98rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--text);
  text-wrap: pretty;
}

.related-excerpt {
  margin: 0;
  font-size: 0.84rem;
  line-height: 1.65;
  color: var(--text-muted);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.related-more {
  margin-top: auto;
  padding-top: 0.3rem;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent-dark);
}

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

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

.postnav-card {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: 0.95rem 1.1rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  color: inherit;
  text-decoration: none;
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}

.postnav-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent-line);
  box-shadow: inset 0 3px 0 var(--accent), var(--shadow-card);
}

.postnav-dir {
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--accent-dark);
}

.postnav-title {
  font-size: 0.94rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--text);
  text-wrap: pretty;
}

.postnav-date {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-faint);
}

/* --------------------------------------------------------------------------
   9. 焦点环与动效降级
   -------------------------------------------------------------------------- */
.tag-btn:focus-visible,
.post-card:focus-visible,
.related-card:focus-visible,
.postnav-card:focus-visible,
.crumbs a:focus-visible,
.list-empty a:focus-visible,
.post-promo .btn:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  .tag-btn,
  .post-card,
  .related-card,
  .postnav-card,
  .post-card::before,
  .prose .check-list li {
    transition: none;
  }

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

/* --------------------------------------------------------------------------
   10. 断点
   -------------------------------------------------------------------------- */
@media (max-width: 860px) {
  .article-hero-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 1.1rem;
  }

  .article-meta-card {
    order: -1;
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem 0.9rem;
    padding: 0.7rem 0.9rem;
  }

  .meta-row {
    display: flex;
    align-items: baseline;
    gap: 0.35rem;
    padding: 0;
    border-bottom: 0;
  }

  .meta-k {
    display: inline;
    margin: 0;
  }

  .meta-v {
    display: inline;
  }

  .prose table {
    display: block;
    width: max-content;
    max-width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
}

@media (max-width: 640px) {
  .post-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .post-card {
    padding: 1.15rem 1.15rem 1rem;
  }

  .post-promo {
    padding: 1.25rem 1.2rem;
  }

  .post-promo-actions {
    width: 100%;
  }

  .post-promo-actions .btn {
    flex: 1 1 auto;
    justify-content: center;
  }

  .prose h2 {
    margin-block: 2rem 0.7rem;
  }
}