/* ==========================================================================
   VPNWS · 博客样式包(列表页 + 文章页)
   依赖 base.css 的设计令牌与 components.css 的基础组件,所有颜色从令牌派生
   ========================================================================== */

:root {
  --reading-w: 56rem;
  --reading-gutter: clamp(1.25rem, 4vw, 1.5rem);
  --hero-pad: min(1.5rem, 3vw);
  --blog-gap-s: clamp(1.5rem, 3.5vw, 2.25rem);
  --blog-gap-m: clamp(2rem, 5vw, 3rem);
}

.no-break {
  white-space: nowrap;
}

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

/* --------------------------------------------------------------------------
   0. 阅读列:面包屑 / hero / 正文 / 文末推广共用同一条列并居中
   -------------------------------------------------------------------------- */

.reading-wrap {
  width: 100%;
  max-width: calc(var(--reading-w) + 2 * var(--reading-gutter));
  margin-inline: auto;
  padding-inline: var(--reading-gutter);
}

/* --------------------------------------------------------------------------
   1. 列表页 hero
   -------------------------------------------------------------------------- */

.blog-hero {
  padding-block: clamp(2.5rem, 7vw, 4.5rem) clamp(1.5rem, 4vw, 2.25rem);
  text-align: center;
  background:
    radial-gradient(58% 62% at 50% 0%, color-mix(in srgb, var(--accent) 7%, transparent), transparent 70%),
    var(--bg);
}

.blog-hero__kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 1.15rem;
  padding: 0.35rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  background: var(--bg-panel);
  box-shadow: var(--shadow-soft);
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  color: var(--text-muted);
}

.blog-hero__kicker::before {
  content: "";
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}

.blog-hero h1 {
  max-width: 34ch;
  margin: 0 auto 1rem;
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--text);
  text-wrap: pretty;
}

.blog-hero__lead {
  max-width: 40rem;
  margin-inline: auto;
  color: var(--text-muted);
  font-size: 1.0625rem;
  line-height: 1.8;
}

/* --------------------------------------------------------------------------
   2. 标签筛选
   -------------------------------------------------------------------------- */

.tag-filter {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: var(--blog-gap-s);
}

.tag-filter button {
  font: inherit;
  font-size: 0.875rem;
  line-height: 1.4;
  padding: 0.45rem 1.05rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--r-pill);
  background: var(--bg-panel);
  color: var(--text-muted);
  cursor: pointer;
  transition: color 0.18s ease, border-color 0.18s ease, background-color 0.18s ease, transform 0.18s ease;
}

.tag-filter button:hover {
  color: var(--text);
  border-color: var(--accent);
  transform: translateY(-1px);
}

.tag-filter button[aria-pressed="true"] {
  background: var(--accent);
  border-color: var(--accent);
  color: #FFFFFF;
  box-shadow: 0 8px 20px var(--accent-shadow);
}

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

/* --------------------------------------------------------------------------
   3. 文章卡片列表
   -------------------------------------------------------------------------- */

.post-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 20rem), 1fr));
  gap: clamp(1rem, 2.5vw, 1.5rem);
}

.post-list .post-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  padding: 1.5rem 1.5rem 1.25rem;
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  background: var(--bg-panel);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.post-list .post-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.25s ease;
}

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

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

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

.post-tag {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.65rem;
  border-radius: var(--r-pill);
  background: var(--accent-soft);
  border: 1px solid color-mix(in srgb, var(--accent) 28%, transparent);
  color: var(--accent-dark);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.post-date {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-soft);
  letter-spacing: 0.01em;
}

.post-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.1875rem;
  font-weight: 800;
  line-height: 1.4;
  letter-spacing: -0.01em;
  text-wrap: pretty;
}

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

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

.post-summary {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.9375rem;
  line-height: 1.75;
}

.post-more {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: auto;
  padding-top: 0.5rem;
  color: var(--accent-dark);
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;
}

.post-more svg {
  transition: transform 0.18s ease;
}

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

.blog-index__empty {
  margin: var(--blog-gap-s) 0 0;
  text-align: center;
  color: var(--text-muted);
}

/* --------------------------------------------------------------------------
   4. 文章页面包屑(与页头留呼吸空间)
   -------------------------------------------------------------------------- */

.breadcrumbs {
  width: 100%;
  max-width: calc(var(--reading-w) + 2 * var(--reading-gutter));
  margin: 1.5rem auto 0;
  padding-inline: var(--reading-gutter);
  font-size: 0.8125rem;
  color: var(--text-soft);
}

.breadcrumbs ol {
  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: var(--border-strong);
}

.breadcrumbs a {
  color: var(--text-muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.16s ease, border-color 0.16s ease;
}

.breadcrumbs a:hover {
  color: var(--accent-dark);
  border-bottom-color: color-mix(in srgb, var(--accent) 45%, transparent);
}

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

/* --------------------------------------------------------------------------
   5. 文章 hero:side-rule-card(带框卡片 + 左侧竖色条)
   -------------------------------------------------------------------------- */

.article-hero {
  width: 100%;
  max-width: calc(var(--reading-w) + 2 * var(--reading-gutter) + 2 * var(--hero-pad));
  margin: clamp(1.5rem, 3.5vw, 2.25rem) auto 0;
  padding-inline: calc(var(--reading-gutter) + var(--hero-pad));
}

.article-hero__card {
  position: relative;
  margin-inline: calc(-1 * var(--hero-pad));
  padding-block: clamp(1.5rem, 3.5vw, 2.25rem);
  padding-inline-start: var(--hero-pad);
  padding-inline-end: var(--hero-pad);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  background:
    radial-gradient(120% 150% at 0% 0%, color-mix(in srgb, var(--accent) 8%, transparent), transparent 62%),
    repeating-linear-gradient(135deg, transparent 0 11px, color-mix(in srgb, var(--border) 45%, transparent) 11px 12px),
    var(--bg-panel);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.article-hero__card::before {
  content: "";
  position: absolute;
  left: 0.7rem;
  top: 1.25rem;
  bottom: 1.25rem;
  width: 4px;
  border-radius: var(--r-pill);
  background: linear-gradient(180deg, var(--accent), var(--accent-2));
}

.reading-wrap .article-hero {
  max-width: none;
  margin-inline: 0;
  padding-inline: 0;
}

.reading-wrap .article-hero__card {
  margin-inline: calc(-1 * var(--hero-pad));
  padding-inline-start: var(--hero-pad);
  padding-inline-end: var(--hero-pad);
}

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

.article-meta .meta-tag {
  display: inline-flex;
  align-items: center;
  padding: 0.22rem 0.7rem;
  border-radius: var(--r-pill);
  background: var(--accent);
  color: #FFFFFF;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.article-meta .meta-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.22rem 0.7rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--r-pill);
  background: var(--bg-panel);
  color: var(--text-muted);
  font-size: 0.75rem;
}

.article-meta .meta-chip time,
.article-meta .meta-chip .mono {
  font-family: var(--font-mono);
  letter-spacing: 0.01em;
}

.article-hero h1 {
  margin: 0 0 0.85rem;
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.6rem);
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: -0.02em;
  color: var(--text);
  text-wrap: pretty;
}

.article-lead {
  margin: 0;
  color: var(--text-muted);
  font-size: 1.0625rem;
  line-height: 1.8;
}

/* --------------------------------------------------------------------------
   6. 正文排版
   -------------------------------------------------------------------------- */

.prose {
  counter-reset: sec;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--text);
}

.prose p,
.prose ul,
.prose ol,
.prose blockquote,
.prose pre,
.prose table,
.prose .stat-grid,
.prose .check-list,
.prose .verdict,
.prose .callout,
.prose .table-scroll {
  margin-block: 1.15em;
}

.prose a {
  color: var(--accent-dark);
  text-decoration: underline;
  text-decoration-color: color-mix(in srgb, var(--accent) 45%, transparent);
  text-underline-offset: 0.18em;
}

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

.prose strong {
  font-weight: 700;
}

.prose h2 {
  margin-block: 2.4em 0.9em;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2.4vw, 1.6rem);
  font-weight: 800;
  line-height: 1.32;
  letter-spacing: -0.015em;
  color: var(--text);
  text-wrap: pretty;
  counter-increment: sec;
}

.prose h2::before {
  content: counter(sec, decimal-leading-zero);
  display: inline-block;
  margin-right: 0.6em;
  padding: 0.1em 0.45em;
  border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
  border-radius: var(--r-sm);
  background: var(--accent-soft);
  color: var(--accent-dark);
  font-family: var(--font-mono);
  font-size: 0.7em;
  vertical-align: 0.12em;
}

.prose h2::after {
  content: "";
  display: block;
  width: 3rem;
  height: 2px;
  margin-top: 0.6rem;
  border-radius: var(--r-pill);
  background: linear-gradient(90deg, var(--accent), transparent);
}

.prose h3 {
  margin-block: 1.9em 0.7em;
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 1.7vw, 1.3rem);
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--text);
  text-wrap: pretty;
}

.prose ul,
.prose ol {
  padding-inline-start: 1.35em;
}

.prose li + li {
  margin-top: 0.35em;
}

.prose blockquote {
  padding: 0.9rem 1.2rem;
  border-left: 3px solid var(--accent);
  border-radius: var(--r-md);
  background: color-mix(in srgb, var(--bg-panel-2) 70%, var(--bg-panel));
  color: var(--text-muted);
}

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

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

.prose hr {
  margin-block: 2.4em;
  border: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-strong), transparent);
}

.prose code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  padding: 0.14em 0.4em;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  background: color-mix(in srgb, var(--bg-panel-2) 80%, var(--bg-panel));
  color: var(--accent-dark);
}

/* 终端窗式代码块 */
.prose pre {
  position: relative;
  margin-block: 1.5em;
  padding: 2.5rem 1.15rem 1.15rem;
  border-radius: var(--r-lg);
  border: 1px solid color-mix(in srgb, var(--text) 80%, #000000);
  background: color-mix(in srgb, var(--text) 94%, #000000);
  color: var(--bg);
  overflow-x: auto;
  box-shadow: var(--shadow-panel);
}

.prose pre::before {
  content: "";
  position: absolute;
  top: 1rem;
  left: 1.15rem;
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: var(--error);
  box-shadow: 1rem 0 0 var(--warn), 2rem 0 0 var(--success);
}

.prose pre code {
  display: block;
  padding: 0;
  border: 0;
  background: transparent;
  color: inherit;
  font-size: 0.875rem;
  line-height: 1.75;
}

/* 表格:实色表头 + 斑马纹 + hover,窄屏可横滑 */
.table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
  line-height: 1.65;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  overflow: hidden;
}

.prose thead th {
  padding: 0.7rem 0.9rem;
  background: var(--text);
  color: var(--bg-panel);
  font-weight: 700;
  text-align: left;
  white-space: nowrap;
}

.prose tbody td,
.prose tbody th {
  padding: 0.65rem 0.9rem;
  border-top: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

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

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

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

  .prose thead,
  .prose tbody,
  .prose tr {
    width: max-content;
    min-width: 100%;
  }

  .prose tbody tr {
    display: table;
    width: 100%;
    table-layout: auto;
  }

  .prose thead tr {
    display: table;
    width: 100%;
    table-layout: auto;
  }
}

/* --------------------------------------------------------------------------
   7. 正文视觉锚点:stat-grid / check-list / verdict / callout
   -------------------------------------------------------------------------- */

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 11rem), 1fr));
  gap: 0.85rem;
  padding: 0;
  list-style: none;
}

.stat-card {
  position: relative;
  padding: 1.15rem 1.15rem 1.05rem;
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  background: var(--bg-panel);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
}

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

.stat-card:nth-child(2n) {
  background: color-mix(in srgb, var(--bg-panel-2) 62%, var(--bg-panel));
}

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

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

.stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.25;
  color: var(--text);
}

.stat-label {
  display: block;
  margin-top: 0.3rem;
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--text-muted);
}

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

.check-list li {
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--bg-panel);
  box-shadow: var(--shadow-soft);
}

.verdict {
  position: relative;
  padding: 1rem 1.15rem;
  border-left: 3px solid var(--accent);
  border-radius: var(--r-md);
  background: color-mix(in srgb, var(--bg-panel-2) 80%, var(--bg-panel));
}

.verdict p {
  margin-block: 0.35em;
}

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

.callout {
  position: relative;
  padding: 1rem 1.15rem 1rem 3.1rem;
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--r-md);
  background: color-mix(in srgb, var(--accent) 6%, var(--bg-panel));
}

.callout::before {
  content: "i";
  position: absolute;
  left: 1rem;
  top: 1.05rem;
  width: 1.4rem;
  height: 1.4rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--accent);
  color: #FFFFFF;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
}

.callout p {
  margin: 0;
}

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

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

.callout--success {
  border-left-color: var(--success);
  background: color-mix(in srgb, var(--success) 8%, var(--bg-panel));
}

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

/* --------------------------------------------------------------------------
   8. 文末推广卡(彩底重配色)
   -------------------------------------------------------------------------- */

.article-promo {
  width: 100%;
  max-width: calc(var(--reading-w) + 2 * var(--reading-gutter));
  margin: var(--blog-gap-m) auto 0;
  padding-inline: var(--reading-gutter);
}

.promo-block {
  position: relative;
  padding: clamp(1.5rem, 4vw, 2.25rem);
  border: 1px solid color-mix(in srgb, var(--accent-dark) 60%, transparent);
  border-radius: var(--r-xl);
  background: linear-gradient(135deg, var(--accent-dark), var(--accent) 55%, var(--accent-2));
  box-shadow: var(--shadow-panel);
  color: #FFFFFF;
  overflow: hidden;
}

.promo-block::after {
  content: "";
  position: absolute;
  right: -3rem;
  top: -3rem;
  width: 12rem;
  height: 12rem;
  border-radius: 50%;
  background: color-mix(in srgb, #FFFFFF 14%, transparent);
  pointer-events: none;
}

.promo-block__brand {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: #FFFFFF;
}

.promo-block__text {
  margin: 0 0 1.25rem;
  max-width: 42rem;
  color: color-mix(in srgb, #FFFFFF 90%, transparent);
  font-size: 1rem;
  line-height: 1.75;
}

.promo-block__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

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

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

.promo-block .btn-ghost {
  background: transparent;
  border-color: color-mix(in srgb, #FFFFFF 68%, transparent);
  color: #FFFFFF;
}

.promo-block .btn-ghost:hover {
  border-color: #FFFFFF;
  background: color-mix(in srgb, #FFFFFF 12%, transparent);
}

/* --------------------------------------------------------------------------
   9. 延伸阅读 + 上一篇/下一篇
   -------------------------------------------------------------------------- */

#related-posts {
  width: 100%;
  max-width: calc(var(--reading-w) + 2 * var(--reading-gutter));
  margin-inline: auto;
  padding-inline: var(--reading-gutter);
  padding-top: clamp(1.5rem, 3.5vw, 2.25rem);
}

.related-heading {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 2vw, 1.45rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--text);
  text-wrap: pretty;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr));
  gap: clamp(0.85rem, 2vw, 1.15rem);
}

.related-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.15rem 1.2rem 1.05rem;
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  background: var(--bg-panel);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.related-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), transparent);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.25s ease;
}

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

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

.related-card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.45;
  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-dark);
}

.related-card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.875rem;
  line-height: 1.7;
}

#post-nav {
  width: 100%;
  max-width: calc(var(--reading-w) + 2 * var(--reading-gutter));
  margin-inline: auto;
  padding-inline: var(--reading-gutter);
  padding-top: clamp(1.25rem, 3vw, 1.75rem);
  padding-bottom: clamp(1.5rem, 3.5vw, 2.25rem);
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

.post-nav__card {
  position: relative;
  flex: 1 1 16rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 1rem 1.15rem;
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  background: var(--bg-panel);
  box-shadow: var(--shadow-soft);
  text-decoration: none;
  overflow: hidden;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

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

.post-nav__card--next {
  text-align: right;
}

.post-nav__dir {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.03em;
  color: var(--accent-dark);
}

.post-nav__title {
  font-family: var(--font-display);
  font-size: 0.9375rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--text);
  text-wrap: pretty;
}

/* --------------------------------------------------------------------------
   10. 列表页与文章页的收尾留白
   -------------------------------------------------------------------------- */

.blog-index {
  padding-bottom: var(--blog-gap-m);
}

.blog-page main {
  padding-bottom: clamp(1rem, 3vw, 2rem);
}

/* --------------------------------------------------------------------------
   11. 响应式
   -------------------------------------------------------------------------- */

@media (max-width: 768px) {
  .article-hero {
    padding-inline: var(--reading-gutter);
    max-width: calc(var(--reading-w) + 2 * var(--reading-gutter));
  }

  .article-hero__card {
    margin-inline: 0;
    padding-inline-start: calc(1rem + 1.35rem);
    padding-inline-end: 1rem;
  }

  .reading-wrap .article-hero__card {
    margin-inline: 0;
    padding-inline-start: calc(1rem + 1.35rem);
    padding-inline-end: 1rem;
  }

  .breadcrumbs {
    margin-top: 1.25rem;
  }

  .post-nav__card--next {
    text-align: left;
  }

  .blog-hero {
    padding-block: clamp(2rem, 9vw, 3rem) 1.5rem;
  }
}

@media (max-width: 480px) {
  .post-list .post-card {
    padding: 1.25rem 1.15rem 1.1rem;
  }

  .article-hero__card::before {
    left: 0.5rem;
    top: 1rem;
    bottom: 1rem;
  }

  .article-hero__card,
  .reading-wrap .article-hero__card {
    padding-inline-start: calc(0.85rem + 1.2rem);
    padding-inline-end: 0.85rem;
  }
}

/* --------------------------------------------------------------------------
   12. 动效降级
   -------------------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  .post-list .post-card,
  .related-card,
  .post-nav__card,
  .tag-filter button,
  .post-more svg {
    transition: none;
  }

  .post-list .post-card:hover,
  .related-card:hover,
  .post-nav__card:hover,
  .tag-filter button:hover {
    transform: none;
  }

  .post-list .post-card::before,
  .related-card::before {
    transition: none;
  }
}