/* ==========================================================================
   VPNDM — 博客样式包(列表页 + 文章页)
   颜色 / 字体 / 圆角一律引用 base.css 设计令牌,不新增图片与字体依赖
   ========================================================================== */

:root {
  --read-col: 55rem;
  --read-pad: clamp(1.5rem, 3.4vw, 2rem);
  --blog-gap: clamp(1rem, 2.4vw, 1.5rem);
}

/* ---------- 共用容器:列表页与文章页同一条居中阅读列 ---------- */

.blog-shell,
.reading-wrap,
.chrome-card {
  width: min(100%, calc(var(--read-col) + 2 * var(--read-pad)));
  max-width: none;
  margin-inline: auto;
  padding-inline: var(--read-pad);
  box-sizing: border-box;
}

.blog-shell {
  display: block;
}

/* ---------- 面包屑(与页头之间留呼吸空间) ---------- */

.breadcrumb {
  margin-top: 1.6rem;
  margin-bottom: 1.1rem;
  padding-top: 0.4rem;
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 0.82rem;
  color: var(--muted);
}

.breadcrumb li {
  display: inline-flex;
  align-items: center;
  min-width: 0;
}

.breadcrumb li:not(:last-child)::after {
  content: "/";
  margin-left: 0.45rem;
  color: var(--border-strong);
}

.breadcrumb a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease;
}

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

.breadcrumb [aria-current="page"] {
  color: var(--ink);
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 22ch;
}

/* ---------- 窗口栏卡片(列表页 hero 与文章页 hero 共用母题) ---------- */

.chrome-card {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-panel);
  padding-top: 3.6rem;
  padding-bottom: clamp(1.6rem, 4vw, 2.4rem);
  overflow: hidden;
}

.chrome-bar {
  position: absolute;
  inset: 0 0 auto 0;
  height: 2.4rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding-inline: 1rem;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, var(--panel-2), var(--panel));
}

.chrome-lights {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.chrome-lights i {
  display: block;
  width: 0.62rem;
  height: 0.62rem;
  border-radius: 50%;
}

.chrome-lights i:nth-child(1) {
  background: var(--error);
}

.chrome-lights i:nth-child(2) {
  background: var(--warn);
}

.chrome-lights i:nth-child(3) {
  background: var(--success);
}

.chrome-file {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.02em;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ---------- 胶囊 / 徽章行 ---------- */

.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.02em;
  padding: 0.28rem 0.62rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--r);
  background: var(--panel);
  color: var(--muted);
  white-space: nowrap;
}

.chip-solid {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--on-dark);
}

/* ---------- 列表页 hero ---------- */

.blog-hero-sec {
  padding-top: clamp(0.6rem, 2vw, 1.2rem);
  padding-bottom: clamp(2rem, 5vw, 3rem);
}

.blog-hero-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.blog-hero h1 {
  margin: 0 0 0.9rem;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.9rem, 4.6vw, 3rem);
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--ink);
  text-wrap: pretty;
}

.blog-hero-lead {
  margin: 0;
  max-width: 46rem;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--muted);
}

/* ---------- 标签筛选 ---------- */

.blog-list-sec {
  padding-bottom: clamp(1.5rem, 4vw, 2.5rem);
}

.tag-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: clamp(1.25rem, 3vw, 2rem);
}

.tag-btn {
  font-family: var(--font-body);
  font-size: 0.88rem;
  font-weight: 600;
  padding: 0.5rem 0.95rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--r);
  background: var(--panel);
  color: var(--muted);
  cursor: pointer;
  transition: color 0.18s ease, border-color 0.18s ease, background 0.18s ease, transform 0.18s ease;
}

.tag-btn:hover {
  color: var(--ink);
  border-color: var(--accent);
  transform: translateY(-1px);
}

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

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

/* ---------- 文章卡片 ---------- */

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

.post-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  background: var(--panel);
  border: 1px solid var(--border-strong);
  border-radius: var(--r);
  padding: clamp(1.1rem, 2.6vw, 1.5rem);
  box-shadow: 0 12px 28px -20px var(--accent-glow-strong);
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  overflow: hidden;
}

.post-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--coral));
  opacity: 0;
  transition: opacity 0.2s ease;
}

.post-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent);
  box-shadow: 0 18px 36px -20px var(--accent-glow-strong);
}

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

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

.post-date {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.02em;
  color: var(--muted-2);
}

.post-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  padding: 0.2rem 0.5rem;
  border: 1px solid color-mix(in srgb, var(--accent) 32%, var(--panel));
  border-radius: var(--r);
  background: color-mix(in srgb, var(--accent) 9%, var(--panel));
  color: var(--accent-dark);
}

.post-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.05rem, 2.1vw, 1.25rem);
  line-height: 1.45;
  letter-spacing: -0.01em;
  color: var(--ink);
  text-wrap: pretty;
}

.post-title a {
  color: inherit;
  text-decoration: none;
  transition: color 0.18s ease;
}

.post-title a:hover {
  color: var(--accent-dark);
}

.post-summary {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.8;
  color: var(--muted);
}

.post-more {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: auto;
  padding-top: 0.4rem;
  font-size: 0.86rem;
  font-weight: 700;
  color: var(--accent-dark);
  text-decoration: none;
}

.post-more-icon {
  transition: transform 0.2s ease;
}

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

.post-empty {
  margin: 0;
  padding: 1.4rem 1.2rem;
  border: 1px dashed var(--border-strong);
  border-radius: var(--r);
  background: var(--panel-2);
  color: var(--muted);
  font-size: 0.94rem;
}

/* ---------- 列表页底部 CTA 带 ---------- */

.blog-cta-sec {
  padding-bottom: clamp(2rem, 6vw, 3.5rem);
}

.blog-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.2rem;
  padding: clamp(1.5rem, 4vw, 2.2rem);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-lg);
  background: var(--panel);
  box-shadow: var(--shadow-soft);
}

.blog-cta-text h2 {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.2rem, 2.6vw, 1.6rem);
  line-height: 1.3;
  letter-spacing: -0.02em;
  color: var(--ink);
  text-wrap: pretty;
}

.blog-cta-text p {
  margin: 0;
  max-width: 40rem;
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--muted);
}

.blog-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

/* ==========================================================================
   文章页
   ========================================================================== */

.article-page {
  padding-bottom: clamp(1.5rem, 4vw, 2.5rem);
}

.article-hero {
  margin-bottom: clamp(1.6rem, 3.5vw, 2.2rem);
}

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

.article-meta .chip {
  white-space: nowrap;
}

.chip-tag {
  background: color-mix(in srgb, var(--accent) 10%, var(--panel));
  border-color: color-mix(in srgb, var(--accent) 34%, var(--panel));
  color: var(--accent-dark);
  font-weight: 700;
}

.article-hero h1 {
  margin: 0 0 0.9rem;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.7rem, 3.9vw, 2.6rem);
  line-height: 1.22;
  letter-spacing: -0.02em;
  color: var(--ink);
  text-wrap: pretty;
}

.article-lead {
  margin: 0;
  font-size: 1rem;
  line-height: 1.9;
  color: var(--muted);
}

/* ---------- 正文列 ---------- */

.reading-wrap {
  display: block;
}

.prose {
  max-width: none;
  counter-reset: h2c;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.85;
  color: var(--ink-2);
  overflow-wrap: break-word;
}

.prose > * + * {
  margin-top: 1.15em;
}

.prose h2 {
  margin: clamp(2.2rem, 5vw, 3rem) 0 0;
  padding-top: 1.1rem;
  border-top: 1px solid var(--border);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.28rem, 2.4vw, 1.6rem);
  line-height: 1.4;
  letter-spacing: -0.015em;
  color: var(--ink);
  text-wrap: pretty;
  counter-increment: h2c;
}

.prose h2::before {
  content: counter(h2c, decimal-leading-zero);
  margin-right: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--accent);
}

.prose > h2:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}

.prose h3 {
  margin: 1.9em 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.08rem, 1.8vw, 1.3rem);
  line-height: 1.45;
  letter-spacing: -0.01em;
  color: var(--ink);
  text-wrap: pretty;
}

.prose p {
  margin: 0;
}

.prose ul,
.prose ol {
  margin: 0;
  padding-left: 1.35em;
}

.prose li + li {
  margin-top: 0.45em;
}

.prose a {
  color: var(--accent-dark);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

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

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

.prose code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  padding: 0.12em 0.38em;
  border: 1px solid var(--border);
  border-radius: var(--r);
  background: var(--panel-2);
  color: var(--ink);
  overflow-wrap: anywhere;
}

.prose blockquote {
  margin: 1.6rem 0;
  padding: 1rem 1.2rem;
  border-left: 3px solid var(--accent);
  border-radius: var(--r);
  background: color-mix(in srgb, var(--accent) 6%, var(--panel));
  color: var(--ink-2);
}

.prose blockquote p + p {
  margin-top: 0.7em;
}

.prose hr {
  margin: 2.2rem 0;
  border: 0;
  border-top: 1px solid var(--border);
}

/* ---------- 终端窗 pre ---------- */

.prose pre {
  position: relative;
  margin: 1.6rem 0;
  padding: 2.5rem 1.2rem 1.2rem;
  border: 1px solid var(--ink);
  border-radius: var(--r-lg);
  background: var(--ink-deep);
  color: var(--on-dark);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.7;
  overflow-x: auto;
}

.prose pre::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 1.7rem;
  border-bottom: 1px solid color-mix(in srgb, var(--on-dark) 14%, transparent);
  border-radius: var(--r-lg) var(--r-lg) 0 0;
  background:
    radial-gradient(circle 4px at 1rem 0.85rem, var(--error) 99%, transparent 100%),
    radial-gradient(circle 4px at 1.9rem 0.85rem, var(--warn) 99%, transparent 100%),
    radial-gradient(circle 4px at 2.8rem 0.85rem, var(--success) 99%, transparent 100%),
    linear-gradient(180deg, color-mix(in srgb, var(--ink) 72%, var(--accent)), transparent);
}

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

/* ---------- 表格(窄屏可横滑) ---------- */

.prose table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  line-height: 1.7;
}

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

.prose tbody td {
  padding: 0.65rem 0.8rem;
  border: 1px solid var(--border);
  color: var(--ink-2);
  vertical-align: top;
}

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

.prose tbody tr:hover {
  background: color-mix(in srgb, var(--accent) 7%, var(--panel));
}

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

/* ---------- 数据卡网格 ---------- */

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(9.5rem, 1fr));
  gap: 0.8rem;
  margin: 1.6rem 0;
}

.stat-card {
  position: relative;
  padding: 1.1rem 1rem 1.05rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--r);
  background: var(--panel);
  box-shadow: 0 10px 24px -20px var(--accent-glow-strong);
  overflow: hidden;
}

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

.stat-card:nth-child(2n)::before {
  background: linear-gradient(90deg, var(--coral), var(--warn));
}

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

.stat-num {
  display: block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.55rem;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.stat-label {
  display: block;
  margin-top: 0.3rem;
  font-size: 0.82rem;
  line-height: 1.65;
  color: var(--muted);
}

/* ---------- 勾叉清单(勾叉写在 li 文本开头,样式不注入任何符号) ---------- */

.check-list {
  list-style: none;
  margin: 1.5rem 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}

.check-list li {
  padding: 0.7rem 0.95rem;
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--r);
  background: var(--panel);
  font-size: 0.95rem;
  line-height: 1.78;
  color: var(--ink-2);
}

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

/* ---------- 结论块 ---------- */

.verdict {
  margin: 1.6rem 0;
  padding: 0.95rem 1.15rem;
  border-left: 3px solid var(--accent);
  border-radius: var(--r);
  background: color-mix(in srgb, var(--accent) 6%, var(--panel));
  font-size: 0.97rem;
  line-height: 1.8;
  color: var(--ink-2);
}

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

/* ---------- callout(左色条 + ::before 图标徽) ---------- */

.callout {
  position: relative;
  margin: 1.6rem 0;
  padding: 1rem 1.15rem 1rem 3.1rem;
  border-left: 3px solid var(--ink-3);
  border-radius: var(--r);
  background: var(--panel-2);
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--ink-2);
}

.callout::before {
  content: "i";
  position: absolute;
  left: 0.95rem;
  top: 1.05rem;
  width: 1.35rem;
  height: 1.35rem;
  border-radius: 50%;
  background: var(--ink-3);
  color: var(--on-dark);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.35rem;
  text-align: center;
}

.callout p {
  margin: 0;
}

.callout.is-warn {
  border-left-color: var(--warn);
  background: color-mix(in srgb, var(--warn) 13%, var(--panel));
}

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

.callout.is-ok {
  border-left-color: var(--success);
  background: color-mix(in srgb, var(--success) 11%, var(--panel));
}

.callout.is-ok::before {
  content: "\2713";
  background: var(--success);
}

/* ---------- 文末推广块(全页唯一) ---------- */

.promo-block {
  position: relative;
  margin-top: clamp(2.4rem, 5vw, 3.4rem);
  padding: clamp(1.6rem, 4vw, 2.4rem);
  border-radius: var(--r-lg);
  background: linear-gradient(135deg, var(--ink-deep) 0%, var(--ink) 46%, var(--accent-dark) 100%);
  color: var(--on-dark);
  overflow: hidden;
}

.promo-block::before {
  content: "";
  position: absolute;
  right: -12%;
  bottom: -55%;
  width: 58%;
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, var(--coral-glow) 0%, transparent 70%);
  pointer-events: none;
}

.promo-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--on-dark-muted);
}

.promo-block h2 {
  position: relative;
  margin: 0.7rem 0 0.6rem;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.3rem, 2.8vw, 1.7rem);
  line-height: 1.3;
  letter-spacing: -0.02em;
  color: var(--on-dark);
  text-wrap: pretty;
}

.promo-block p {
  position: relative;
  margin: 0;
  max-width: 42rem;
  font-size: 0.96rem;
  line-height: 1.85;
  color: var(--on-dark-muted);
}

.promo-actions {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.2rem;
}

.promo-block .btn-primary {
  background: var(--panel);
  border-color: var(--panel);
  color: var(--ink);
}

.promo-block .btn-primary:hover {
  background: var(--panel-2);
  border-color: var(--panel-2);
}

.promo-block .btn-ghost {
  background: transparent;
  border: 1px solid color-mix(in srgb, var(--on-dark) 58%, transparent);
  color: var(--on-dark);
}

.promo-block .btn-ghost:hover {
  border-color: var(--on-dark);
}

/* ---------- 延伸阅读 ---------- */

#related-posts {
  padding-top: 2rem;
}

.related-head h2 {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.1rem, 2.2vw, 1.3rem);
  letter-spacing: -0.015em;
  color: var(--ink);
  text-wrap: pretty;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.9rem;
}

.related-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1rem 1.05rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--r);
  background: var(--panel);
  text-decoration: none;
  overflow: hidden;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.related-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--coral));
  opacity: 0;
  transition: opacity 0.2s ease;
}

.related-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent);
  box-shadow: 0 14px 30px -22px var(--accent-glow-strong);
}

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

.related-tag {
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.04em;
  padding: 0.18rem 0.46rem;
  border: 1px solid color-mix(in srgb, var(--accent) 32%, var(--panel));
  border-radius: var(--r);
  background: color-mix(in srgb, var(--accent) 9%, var(--panel));
  color: var(--accent-dark);
}

.related-card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.97rem;
  line-height: 1.55;
  letter-spacing: -0.01em;
  color: var(--ink);
  text-wrap: pretty;
}

.related-date {
  margin-top: auto;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--muted-2);
}

/* ---------- 上一篇 / 下一篇 ---------- */

#post-nav {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
  gap: 0.9rem;
  padding-top: 1.25rem;
  padding-bottom: 2.5rem;
}

.post-nav-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding: 1rem 1.1rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--r);
  background: var(--panel);
  text-decoration: none;
  overflow: hidden;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.post-nav-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--coral));
  opacity: 0;
  transition: opacity 0.2s ease;
}

.post-nav-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
  box-shadow: 0 14px 30px -22px var(--accent-glow-strong);
}

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

.post-nav-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--accent-dark);
}

.post-nav-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.96rem;
  line-height: 1.55;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.post-nav-date {
  margin-top: auto;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--muted-2);
}

.post-nav-card.is-next {
  text-align: right;
}

.post-nav-card.is-next .post-nav-label,
.post-nav-card.is-next .post-nav-title,
.post-nav-card.is-next .post-nav-date {
  align-self: flex-end;
}

/* ---------- 响应式 ---------- */

@media (max-width: 900px) {
  .related-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .post-grid,
  .related-grid {
    grid-template-columns: 1fr;
  }

  .blog-cta {
    align-items: flex-start;
  }

  .blog-hero h1 {
    font-size: clamp(1.7rem, 8vw, 2.2rem);
  }

  .article-hero h1 {
    font-size: clamp(1.5rem, 7vw, 2rem);
  }
}

@media (max-width: 640px) {
  .breadcrumb [aria-current="page"] {
    max-width: 14ch;
  }

  .chrome-card {
    padding-top: 3.2rem;
  }

  .chrome-bar {
    height: 2.2rem;
  }

  .post-nav-card.is-next {
    text-align: left;
  }

  .post-nav-card.is-next .post-nav-label,
  .post-nav-card.is-next .post-nav-title,
  .post-nav-card.is-next .post-nav-date {
    align-self: flex-start;
  }
}

/* ---------- 动效降级 ---------- */

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

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

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