/* ==========================================================================
   MeyeVPN · blog.css
   博客列表页 + 文章页专属样式包
   所有颜色 / 字体 / 圆角均引用 base.css 的 :root 令牌,不散落硬编码色值
   ========================================================================== */

:root {
  --blog-reading: 55rem;
  --blog-soft: color-mix(in srgb, var(--accent) 5%, var(--panel));
  --blog-soft-2: color-mix(in srgb, var(--accent) 9%, var(--panel));
  --blog-code-bg: color-mix(in srgb, var(--text) 94%, var(--accent-dark));
  --blog-code-fg: color-mix(in srgb, var(--panel) 86%, var(--accent-2));
  --blog-on-accent: var(--panel);
  --blog-grid-line: color-mix(in srgb, var(--accent) 6%, transparent);
}

/* --------------------------------------------------------------------------
   1. 阅读列:面包屑 / hero / 正文 / 文末推广 / 延伸阅读 / 上下篇 同一条列
   -------------------------------------------------------------------------- */

.article-hero,
.reading-wrap,
.breadcrumb-wrap,
.article-promo,
.related-wrap,
.postnav-wrap {
  width: 100%;
  max-width: calc(var(--blog-reading) + var(--gutter) * 2);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.article-hero > .wrap,
.reading-wrap > .wrap,
.breadcrumb-wrap > .wrap,
.article-promo > .wrap {
  max-width: none;
  padding-inline: 0;
}

/* 中文关键词防断词:桌面不折行,窄屏放行 */
.no-break {
  white-space: nowrap;
}

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

/* --------------------------------------------------------------------------
   2. 面包屑(与页头留呼吸空间)
   -------------------------------------------------------------------------- */

.breadcrumb-wrap {
  padding-top: clamp(1.4rem, 3vw, 2.2rem);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--muted);
}

.breadcrumb li {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin: 0;
  list-style: none;
}

.breadcrumb li + li::before {
  content: "›";
  color: color-mix(in srgb, var(--muted) 55%, var(--panel));
}

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

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

/* --------------------------------------------------------------------------
   3. 文章 hero:带框卡片 + 左侧渐变竖条 + 网格纸底纹
   -------------------------------------------------------------------------- */

.article-hero {
  position: relative;
  overflow: hidden;
  margin-top: clamp(1.1rem, 2.4vw, 1.7rem);
  padding-block: clamp(1.7rem, 3.6vw, 2.5rem);
  background-color: var(--blog-soft);
  background-image:
    linear-gradient(var(--blog-grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--blog-grid-line) 1px, transparent 1px);
  background-size: 24px 24px;
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  box-shadow: var(--shadow-card);
}

.article-hero::before {
  content: "";
  position: absolute;
  left: 0.85rem;
  top: 1rem;
  bottom: 1rem;
  width: 4px;
  border-radius: var(--r-pill);
  background: linear-gradient(180deg, var(--accent), var(--accent-2));
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 1rem;
}

.article-meta > span,
.article-meta .badge,
.article-meta .tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.28rem 0.72rem;
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  background: var(--panel);
  color: var(--muted);
  font-size: 0.8rem;
  line-height: 1.5;
  letter-spacing: 0.01em;
}

.article-meta .badge {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--blog-on-accent);
  font-weight: 600;
}

.article-hero h1 {
  margin: 0 0 0.85rem;
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3.4vw, 2.6rem);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--text);
  text-wrap: pretty;
}

.article-hero p {
  max-width: 46rem;
  margin: 0;
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--muted);
}

/* --------------------------------------------------------------------------
   4. 正文排版(克制优先,营销页展示字号不带进来)
   -------------------------------------------------------------------------- */

.reading-wrap {
  counter-reset: blog-sec;
  padding-block: clamp(1.6rem, 3vw, 2.4rem) clamp(1.8rem, 3.6vw, 2.6rem);
}

.reading-wrap h1,
.reading-wrap h2,
.reading-wrap h3,
.reading-wrap h4 {
  font-family: var(--font-display);
  font-weight: 800;
  color: var(--text);
  text-wrap: pretty;
}

.reading-wrap h2 {
  position: relative;
  counter-increment: blog-sec;
  margin: 2.4rem 0 1rem;
  padding-bottom: 0.55rem;
  border-bottom: 1px solid var(--border);
  font-size: clamp(1.3rem, 2.2vw, 1.6rem);
  line-height: 1.4;
  letter-spacing: -0.015em;
}

.reading-wrap h2::before {
  content: counter(blog-sec, decimal-leading-zero);
  display: inline-block;
  margin-right: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.82em;
  font-weight: 700;
  color: var(--accent);
}

.reading-wrap h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 3.2rem;
  height: 2px;
  border-radius: var(--r-pill);
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
}

.reading-wrap h3 {
  margin: 1.8rem 0 0.7rem;
  font-size: clamp(1.1rem, 1.7vw, 1.3rem);
  line-height: 1.5;
  letter-spacing: -0.012em;
}

.reading-wrap h4 {
  margin: 1.4rem 0 0.6rem;
  font-size: 1.05rem;
  line-height: 1.55;
}

.reading-wrap p,
.reading-wrap li {
  font-size: 1rem;
  line-height: 1.85;
  color: var(--text);
}

.reading-wrap p {
  margin: 0 0 1.15rem;
}

.reading-wrap ul,
.reading-wrap ol {
  margin: 0 0 1.3rem;
  padding-left: 1.35rem;
}

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

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

.reading-wrap a {
  color: var(--accent-dark);
  text-decoration-color: var(--tint-42);
  text-underline-offset: 0.2em;
}

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

.reading-wrap strong {
  font-weight: 700;
}

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

.reading-wrap blockquote {
  margin: 1.6rem 0;
  padding: 1rem 1.2rem 1rem 1.3rem;
  border-left: 4px solid var(--accent-2);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  background: var(--panel);
  box-shadow: var(--shadow-soft);
  color: var(--muted);
}

.reading-wrap blockquote p {
  margin-bottom: 0.6rem;
  color: var(--muted);
}

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

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

.reading-wrap figure {
  margin: 1.6rem 0;
}

.reading-wrap figcaption {
  margin-top: 0.5rem;
  font-size: 0.86rem;
  color: var(--muted);
}

/* --------------------------------------------------------------------------
   5. 表格:实色表头 + 斑马纹 + hover,窄屏横滑不撑破版心
   -------------------------------------------------------------------------- */

.reading-wrap table {
  margin: 0 0 1.6rem;
  border: 1px solid var(--border);
  border-collapse: collapse;
  background: var(--panel);
  font-size: 0.94rem;
}

.reading-wrap thead th {
  padding: 0.7rem 0.85rem;
  background: var(--accent-dark);
  color: var(--panel);
  font-weight: 600;
  text-align: left;
  white-space: nowrap;
}

.reading-wrap tbody td {
  padding: 0.65rem 0.85rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
  line-height: 1.7;
}

.reading-wrap tbody tr:nth-child(even) {
  background: var(--panel-2);
}

.reading-wrap tbody tr:hover {
  background: var(--tint-6);
}

.reading-wrap .table-scroll {
  max-width: 100%;
  margin: 0 0 1.6rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.reading-wrap .table-scroll table {
  margin-bottom: 0;
  min-width: 34rem;
}

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

  .reading-wrap .table-scroll table {
    min-width: 34rem;
  }
}

/* --------------------------------------------------------------------------
   6. 代码块:终端窗(深底浅字 + 红黄绿灯 + 角签)
   -------------------------------------------------------------------------- */

.reading-wrap pre {
  position: relative;
  margin: 1.6rem 0;
  padding: 2.7rem 1.15rem 1.15rem;
  background: var(--blog-code-bg);
  color: var(--blog-code-fg);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-card);
  font-family: var(--font-mono);
  font-size: 0.86rem;
  line-height: 1.7;
  overflow-x: auto;
}

.reading-wrap pre::before {
  content: "";
  position: absolute;
  top: 1rem;
  left: 1.1rem;
  width: 0.6rem;
  height: 0.6rem;
  border-radius: 50%;
  background: var(--error);
  box-shadow: 1rem 0 0 var(--warn), 2rem 0 0 var(--success);
}

.reading-wrap pre::after {
  content: "terminal";
  position: absolute;
  top: 0.72rem;
  right: 1.1rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--blog-code-fg) 55%, transparent);
}

.reading-wrap pre code {
  padding: 0;
  background: none;
  color: inherit;
  font-size: inherit;
}

.reading-wrap :not(pre) > code {
  padding: 0.12em 0.4em;
  border-radius: var(--r-sm);
  background: var(--blog-soft-2);
  color: var(--accent-dark);
  font-family: var(--font-mono);
  font-size: 0.88em;
}

/* --------------------------------------------------------------------------
   7. callout:左色条 + 图标徽,三种变体各配色调 tint 底
   -------------------------------------------------------------------------- */

.reading-wrap .callout {
  position: relative;
  margin: 1.6rem 0;
  padding: 1.05rem 1.2rem 1.05rem 3.1rem;
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  background: var(--blog-soft);
  font-size: 0.98rem;
  line-height: 1.8;
  color: var(--text);
}

.reading-wrap .callout::before {
  content: "i";
  position: absolute;
  left: 1.05rem;
  top: 1.1rem;
  display: grid;
  place-items: center;
  width: 1.35rem;
  height: 1.35rem;
  border-radius: 50%;
  background: var(--accent);
  color: var(--panel);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  line-height: 1;
}

.reading-wrap .callout strong {
  color: var(--accent-dark);
}

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

.reading-wrap .callout.is-warning,
.reading-wrap .callout-warning {
  background: color-mix(in srgb, var(--warn) 9%, var(--panel));
  border-left-color: var(--warn);
}

.reading-wrap .callout.is-warning::before,
.reading-wrap .callout-warning::before {
  content: "!";
  background: var(--warn);
}

.reading-wrap .callout.is-warning strong,
.reading-wrap .callout-warning strong {
  color: color-mix(in srgb, var(--warn) 76%, var(--text));
}

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

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

.reading-wrap .callout.is-success strong,
.reading-wrap .callout-success strong {
  color: color-mix(in srgb, var(--success) 74%, var(--text));
}

/* --------------------------------------------------------------------------
   8. 数据卡网格:至少两档颜色变化
   -------------------------------------------------------------------------- */

.reading-wrap .stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(10.5rem, 1fr));
  gap: 0.9rem;
  margin: 1.7rem 0;
}

.reading-wrap .stat-card {
  position: relative;
  overflow: hidden;
  padding: 1.15rem 1.1rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  background: var(--panel);
  box-shadow: var(--shadow-soft);
}

.reading-wrap .stat-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
}

.reading-wrap .stat-card:nth-child(2n) {
  background: var(--panel-2);
}

.reading-wrap .stat-card:nth-child(2n)::before {
  background: var(--accent-dark);
}

.reading-wrap .stat-card:nth-child(3n) {
  background: var(--blog-soft);
}

.reading-wrap .stat-card:nth-child(3n)::before {
  background: linear-gradient(90deg, var(--accent-2), var(--accent));
}

.reading-wrap .stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.55rem;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--accent-dark);
}

.reading-wrap .stat-card:nth-child(2n) .stat-num {
  color: var(--accent);
}

.reading-wrap .stat-label {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.86rem;
  line-height: 1.6;
  color: var(--muted);
}

/* --------------------------------------------------------------------------
   9. 勾叉清单:只做容器 / 行卡装饰,勾叉符号由 li 文本自带
   -------------------------------------------------------------------------- */

.reading-wrap .check-list {
  display: grid;
  gap: 0.55rem;
  margin: 1.6rem 0;
  padding: 0;
  list-style: none;
}

.reading-wrap .check-list li {
  margin: 0;
  padding: 0.75rem 0.95rem;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--panel);
  box-shadow: var(--shadow-soft);
  list-style: none;
  line-height: 1.8;
}

.reading-wrap .check-list li:nth-child(2n) {
  background: var(--panel-2);
}

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

/* --------------------------------------------------------------------------
   10. 结论块
   -------------------------------------------------------------------------- */

.reading-wrap .verdict {
  margin: 1.7rem 0;
  padding: 1rem 1.2rem;
  border-left: 4px solid var(--accent);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  background: var(--blog-soft);
  font-size: 1rem;
  line-height: 1.8;
}

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

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

/* --------------------------------------------------------------------------
   11. 文末推广卡(全页唯一推广块,彩底重配色)
   -------------------------------------------------------------------------- */

.article-promo {
  margin-top: clamp(2rem, 4vw, 3rem);
}

.article-promo .promo-block,
.article-promo .promo-card {
  position: relative;
  overflow: hidden;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.2rem;
  padding: clamp(1.5rem, 4vw, 2.3rem);
  border-radius: var(--r-xl);
  background: linear-gradient(135deg, var(--accent-dark) 0%, var(--accent) 52%, var(--accent-2) 100%);
  color: var(--panel);
  box-shadow: var(--shadow-panel);
}

.article-promo .promo-block::after,
.article-promo .promo-card::after {
  content: "";
  position: absolute;
  right: -3.5rem;
  top: -3.5rem;
  width: 12rem;
  height: 12rem;
  border-radius: 50%;
  background: color-mix(in srgb, var(--panel) 12%, transparent);
  pointer-events: none;
}

.article-promo .promo-block > *,
.article-promo .promo-card > * {
  position: relative;
  z-index: 1;
}

.article-promo h3 {
  margin: 0 0 0.45rem;
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2vw, 1.4rem);
  font-weight: 800;
  letter-spacing: -0.015em;
  color: var(--panel);
  text-wrap: pretty;
}

.article-promo p {
  margin: 0;
  max-width: 34rem;
  line-height: 1.75;
  color: color-mix(in srgb, var(--panel) 86%, var(--accent-2));
}

.article-promo .btn-primary {
  background: var(--panel);
  color: var(--accent-dark);
  box-shadow: none;
}

.article-promo .btn-primary:hover {
  background: color-mix(in srgb, var(--panel) 90%, var(--accent-2));
}

.article-promo .btn-secondary {
  background: transparent;
  border-color: color-mix(in srgb, var(--panel) 55%, transparent);
  color: var(--panel);
}

.article-promo .btn-secondary:hover {
  background: color-mix(in srgb, var(--panel) 14%, transparent);
}

/* --------------------------------------------------------------------------
   12. 延伸阅读 + 上一篇 / 下一篇(垫距合计 ≤5rem,不叠出空洞)
   -------------------------------------------------------------------------- */

#related-posts,
#post-nav {
  padding: 0;
}

.related-wrap {
  padding-block: 1.6rem 1.4rem;
}

.related-wrap h2 {
  position: relative;
  margin: 0 0 1rem;
  padding-left: 0.85rem;
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2vw, 1.35rem);
  font-weight: 800;
  letter-spacing: -0.015em;
  color: var(--text);
  text-wrap: pretty;
}

.related-wrap h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.15em;
  bottom: 0.15em;
  width: 3px;
  border-radius: var(--r-pill);
  background: linear-gradient(180deg, var(--accent), var(--accent-2));
}

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

.related-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  padding: 1.05rem 1.1rem;
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  background: var(--panel);
  box-shadow: var(--shadow-soft);
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}

.related-card::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 2px;
  border-radius: var(--r-lg) var(--r-lg) 0 0;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  opacity: 0;
  transition: opacity 0.18s ease;
}

.related-card:hover {
  transform: translateY(-2px);
  border-color: var(--tint-42);
  box-shadow: var(--shadow-card);
}

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

.related-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.78rem;
  color: var(--muted);
}

.related-meta .tag {
  font-size: 0.78rem;
}

.related-card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 700;
  line-height: 1.55;
  letter-spacing: -0.01em;
  text-wrap: pretty;
}

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

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

.related-card p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--muted);
}

.postnav-wrap {
  padding-block: 1.4rem 2.2rem;
}

.postnav-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
}

.postnav-card {
  position: relative;
  flex: 1 1 16rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding: 1rem 1.1rem;
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  background: var(--panel);
  box-shadow: var(--shadow-soft);
  text-decoration: none;
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}

.postnav-card::after {
  content: "";
  position: absolute;
  left: 1.1rem;
  right: 1.1rem;
  top: 0;
  height: 2px;
  border-radius: var(--r-pill);
  background: var(--accent);
  opacity: 0;
  transition: opacity 0.18s ease;
}

.postnav-card:hover {
  transform: translateY(-2px);
  border-color: var(--tint-42);
  box-shadow: var(--shadow-card);
}

.postnav-card:hover::after {
  opacity: 1;
}

.postnav-label {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

.postnav-title {
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.6;
  color: var(--text);
}

/* --------------------------------------------------------------------------
   13. 列表页:hero 卡片 + 标签筛选 + 文章卡
   -------------------------------------------------------------------------- */

.blog-hero {
  position: relative;
  overflow: hidden;
  margin-top: clamp(1.4rem, 3vw, 2.2rem);
  padding: clamp(1.7rem, 4vw, 2.6rem) var(--gutter);
  background-color: var(--blog-soft);
  background-image:
    linear-gradient(var(--blog-grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--blog-grid-line) 1px, transparent 1px);
  background-size: 24px 24px;
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  box-shadow: var(--shadow-card);
}

.blog-hero::before {
  content: "";
  position: absolute;
  left: 0.85rem;
  top: 1rem;
  bottom: 1rem;
  width: 4px;
  border-radius: var(--r-pill);
  background: linear-gradient(180deg, var(--accent), var(--accent-2));
}

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

.blog-kicker {
  margin: 0 0 0.7rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
}

.blog-hero h1 {
  margin: 0 0 0.8rem;
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4.6vw, 3rem);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--text);
  text-wrap: pretty;
}

.blog-hero .lead {
  max-width: 46rem;
  margin: 0 0 1.1rem;
  font-size: 1.02rem;
  line-height: 1.85;
  color: var(--muted);
}

.blog-hero .fact-strip {
  margin-top: 0.2rem;
}

.blog-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin: clamp(1.6rem, 3vw, 2.2rem) 0 1.3rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

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

.tag-btn {
  padding: 0.6rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  background: var(--panel);
  color: var(--muted);
  font: inherit;
  font-size: 0.88rem;
  line-height: 1;
  cursor: pointer;
  transition: color 0.16s ease, border-color 0.16s ease, background-color 0.16s ease;
}

.tag-btn:hover {
  color: var(--accent);
  border-color: var(--tint-42);
}

.tag-btn.is-active {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--panel);
  font-weight: 600;
}

.tag-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.blog-count {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--muted);
}

.post-grid .post-card {
  position: relative;
  overflow: hidden;
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}

.post-grid .post-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  border-radius: var(--r-pill);
  background: linear-gradient(180deg, var(--accent), var(--accent-2));
  opacity: 0;
  transition: opacity 0.18s ease;
}

.post-grid .post-card:hover {
  transform: translateY(-3px);
  border-color: var(--tint-42);
  box-shadow: var(--shadow-card);
}

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

.post-grid .post-card h3 {
  text-wrap: pretty;
}

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

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

.post-grid .post-card p {
  color: var(--muted);
  line-height: 1.8;
}

.post-read {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
}

.post-read::after {
  content: "→";
  transition: transform 0.16s ease;
}

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

.post-empty {
  grid-column: 1 / -1;
  margin: 0;
  padding: 2.4rem 1rem;
  border: 1px dashed var(--border);
  border-radius: var(--r-lg);
  background: var(--panel);
  color: var(--muted);
  text-align: center;
}

/* --------------------------------------------------------------------------
   14. 窄屏与降级
   -------------------------------------------------------------------------- */

@media (max-width: 768px) {
  .article-hero,
  .reading-wrap,
  .breadcrumb-wrap,
  .article-promo,
  .related-wrap,
  .postnav-wrap {
    padding-inline: clamp(1.25rem, 5vw, var(--gutter));
  }

  .article-hero,
  .blog-hero {
    border-radius: var(--r-lg);
  }

  .article-hero::before,
  .blog-hero::before {
    left: 0.6rem;
    top: 0.8rem;
    bottom: 0.8rem;
    width: 3px;
   }

  .blog-toolbar {
    flex-direction: column;
    align-items: flex-start;
  }

  .postnav-card {
    flex: 1 1 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .post-grid .post-card,
  .related-card,
  .postnav-card,
  .tag-btn {
    transition: none;
  }

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

  .post-read::after {
    transition: none;
  }
}