/* VPNAY 博客专属样式:列表页刊头 / 文章卡 / 文章页富样式包
   全部颜色与圆角派生自 base.css 的设计令牌 */

:root {
  --reading-col: 54rem;
  --blog-rule: 3.5em;
}

/* ---------- 面包屑:与页头留呼吸空间 ---------- */

.breadcrumbs {
  margin-top: 1.6rem;
  padding-top: 0.4rem;
  font-size: 0.82rem;
  color: var(--muted);
}

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

.breadcrumbs li {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}

.breadcrumbs li + li::before {
  content: "→";
  color: var(--doodle);
  font-size: 0.78rem;
}

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

.breadcrumbs a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent-22);
}

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

/* ---------- 通用阅读列:面包屑 / hero / 正文 / 文末共用 ---------- */

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

/* ---------- 列表页刊头(居中刊头) ---------- */

.blog-hero {
  width: 100%;
  max-width: calc(var(--reading-col) + var(--gutter) * 2);
  margin-inline: auto;
  padding-block: clamp(2.4rem, 6vw, 4.2rem) clamp(1.2rem, 3vw, 2rem);
  padding-inline: var(--gutter);
  text-align: center;
  position: relative;
}

.blog-hero::before {
  content: "";
  position: absolute;
  top: 1.1rem;
  left: 50%;
  transform: translateX(-50%);
  width: min(18rem, 62%);
  height: 5px;
  border-top: 1px solid var(--border-strong);
  border-bottom: 1px solid var(--border);
}

.kicker {
  margin: 0 0 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
}

.kicker::before,
.kicker::after {
  content: "";
  display: inline-block;
  width: 1.5rem;
  height: 1px;
  background: var(--border-strong);
  vertical-align: middle;
}

.kicker::before {
  margin-right: 0.7rem;
}

.kicker::after {
  margin-left: 0.7rem;
}

.blog-hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4.6vw, 3rem);
  font-weight: 900;
  letter-spacing: -0.015em;
  line-height: 1.18;
  color: var(--ink);
  text-wrap: pretty;
}

.hero-rule {
  display: block;
  width: var(--blog-rule);
  height: 2px;
  margin: 1.1rem auto 0;
  border-radius: var(--r-pill);
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
}

.blog-hero-sub {
  margin: 1.1rem auto 0;
  max-width: 34rem;
  color: var(--muted);
  font-size: 0.98rem;
  line-height: 1.8;
}

/* ---------- 标签筛选 ---------- */

.tag-filter {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
  margin: 0 0 1.8rem;
  padding-top: 0.6rem;
}

.tag-filter button {
  appearance: none;
  cursor: pointer;
  padding: 0.42rem 0.95rem;
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  background: var(--bg-panel);
  color: var(--muted);
  font-family: var(--font-body);
  font-size: 0.85rem;
  line-height: 1.4;
  transition: border-color 0.18s ease, color 0.18s ease, background-color 0.18s ease;
}

.tag-filter button:hover {
  border-color: var(--border-strong);
  color: var(--ink);
}

.tag-filter button[aria-pressed="true"] {
  background: var(--accent-08);
  border-color: var(--accent-22);
  color: var(--accent-2);
  font-weight: 600;
}

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

/* ---------- 文章卡网格 ---------- */

.post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 19rem), 1fr));
  gap: 1.15rem;
  padding-bottom: 1rem;
}

.post-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  padding: 1.25rem 1.3rem 1.35rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-panel);
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.post-card::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 1.3rem;
  right: 1.3rem;
  height: 2px;
  border-radius: var(--r-pill);
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  opacity: 0;
  transition: opacity 0.2s ease;
}

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

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

.post-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--muted);
}

.post-tag {
  display: inline-block;
  padding: 0.18rem 0.6rem;
  border-radius: var(--r-pill);
  background: var(--accent);
  color: var(--bg-panel);
  font-family: var(--font-body);
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.post-card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.12rem;
  font-weight: 800;
  line-height: 1.45;
  letter-spacing: -0.01em;
  text-wrap: pretty;
}

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

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

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

.post-more {
  margin-top: auto;
  padding-top: 0.3rem;
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
}

.post-more:hover {
  color: var(--accent-2);
}

.post-empty {
  padding: 2rem 0 3rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.92rem;
}

/* ---------- 文章页刊头(centered-formal) ---------- */

.article-hero {
  position: relative;
  width: 100%;
  max-width: calc(var(--reading-col) + var(--gutter) * 2);
  margin-inline: auto;
  padding-block: clamp(1.8rem, 4vw, 2.8rem) clamp(1.4rem, 3vw, 2rem);
  padding-inline: var(--gutter);
  text-align: center;
}

.article-hero::before {
  content: "";
  position: absolute;
  top: 0.5rem;
  left: 50%;
  transform: translateX(-50%);
  width: min(16rem, 60%);
  height: 5px;
  border-top: 1px solid var(--border-strong);
  border-bottom: 1px solid var(--border);
}

.article-hero h1 {
  margin: 0.2rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 4vw, 2.6rem);
  font-weight: 900;
  letter-spacing: -0.015em;
  line-height: 1.22;
  color: var(--ink);
  text-wrap: pretty;
}

.article-hero .article-summary {
  margin: 1.15rem auto 0;
  max-width: 38rem;
  color: var(--muted);
  font-size: 0.98rem;
  line-height: 1.85;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 0.55rem;
  margin: 1.15rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
}

.article-meta .tag-badge {
  display: inline-block;
  padding: 0.2rem 0.65rem;
  border-radius: var(--r-pill);
  background: var(--accent);
  color: var(--bg-panel);
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 600;
}

.article-meta .meta-chip {
  display: inline-block;
  padding: 0.2rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  background: var(--bg-panel);
}

.article-meta .meta-sep {
  color: var(--doodle);
}

/* ---------- 正文排版 ---------- */

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

.prose > p,
.prose > ul,
.prose > ol,
.prose > blockquote,
.prose > .callout,
.prose > .stat-grid,
.prose > .verdict,
.prose > .check-list {
  margin-block: 1.15rem;
}

.prose p {
  margin-block: 1.15rem;
}

.prose a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: var(--accent-22);
  text-underline-offset: 0.2em;
}

.prose a:hover {
  color: var(--accent-2);
}

.prose h2 {
  counter-increment: sec;
  margin: 2.6rem 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(1.28rem, 2.6vw, 1.6rem);
  font-weight: 800;
  line-height: 1.35;
  letter-spacing: -0.01em;
  text-wrap: pretty;
  padding-bottom: 0.55rem;
  border-bottom: 1px solid var(--border);
}

.prose h2::before {
  content: counter(sec, decimal-leading-zero);
  display: inline-block;
  margin-right: 0.6rem;
  padding: 0.12rem 0.45rem;
  border-radius: var(--r-sm);
  background: var(--accent-08);
  color: var(--accent-2);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  vertical-align: 0.14em;
}

.prose h3 {
  margin: 1.9rem 0 0.7rem;
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  line-height: 1.4;
  text-wrap: pretty;
}

.prose ul,
.prose ol {
  padding-left: 1.35rem;
}

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

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

.prose blockquote {
  margin-inline: 0;
  padding: 0.9rem 1.15rem;
  border-left: 3px solid var(--accent-2);
  background: var(--bg-panel-2);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  color: var(--ink);
  font-size: 0.96rem;
}

.prose blockquote p {
  margin-block: 0.4rem;
}

.prose code {
  font-family: var(--font-mono);
  font-size: 0.86em;
  padding: 0.12em 0.38em;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  background: var(--bg-panel-2);
}

.prose pre {
  position: relative;
  margin-block: 1.4rem;
  padding: 2.2rem 1.2rem 1.15rem;
  background: var(--ink-deep);
  border: 1px solid var(--ink-deep);
  border-radius: var(--r-md);
  overflow-x: auto;
  box-shadow: var(--shadow-device);
}

.prose pre::before {
  content: "";
  position: absolute;
  top: 0.85rem;
  left: 1rem;
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--error);
  box-shadow: 0.85rem 0 0 var(--warn), 1.7rem 0 0 var(--success);
}

.prose pre code {
  display: block;
  padding: 0;
  border: 0;
  background: none;
  color: var(--ink);
  font-size: 0.85rem;
  line-height: 1.7;
  white-space: pre;
}

/* ---------- 表格:实色表头 + 斑马纹 + 窄屏横滑 ---------- */

.prose table {
  width: 100%;
  margin-block: 1.5rem;
  border-collapse: collapse;
  font-size: 0.92rem;
}

.prose thead th {
  padding: 0.65rem 0.8rem;
  background: var(--ink-deep);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-weight: 600;
  text-align: left;
  white-space: nowrap;
}

.prose thead th:first-child {
  border-top-left-radius: var(--r-sm);
}

.prose thead th:last-child {
  border-top-right-radius: var(--r-sm);
}

.prose tbody td {
  padding: 0.62rem 0.8rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

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

.prose tbody tr:hover {
  background: var(--accent-08);
}

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

/* ---------- 富文本锚点组件 ---------- */

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(8.5rem, 1fr));
  gap: 0.85rem;
  margin-block: 1.6rem;
}

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

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

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

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

.stat-card:nth-child(3n + 1) {
  background: color-mix(in srgb, var(--accent) 4%, var(--bg-panel));
}

.stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--accent-2);
  letter-spacing: -0.01em;
}

.stat-label {
  display: block;
  margin-top: 0.3rem;
  color: var(--muted);
  font-size: 0.83rem;
  line-height: 1.6;
}

.check-list {
  list-style: none;
  padding: 0;
  margin-block: 1.4rem;
  display: grid;
  gap: 0.5rem;
}

.check-list li {
  padding: 0.7rem 0.95rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  font-size: 0.94rem;
  line-height: 1.75;
}

.check-list li:hover {
  border-color: var(--border-strong);
}

.verdict {
  margin-block: 1.6rem;
  padding: 1rem 1.15rem;
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  background: color-mix(in srgb, var(--accent) 6%, var(--bg-panel));
  font-size: 0.96rem;
  line-height: 1.8;
}

.verdict strong:first-child {
  color: var(--accent-2);
}

/* ---------- callout ---------- */

.callout {
  position: relative;
  padding: 1rem 1.15rem 1rem 3rem;
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--r-md);
  background: var(--bg-panel);
  font-size: 0.94rem;
  line-height: 1.8;
}

.callout::before {
  content: "i";
  position: absolute;
  left: 0.95rem;
  top: 1.05rem;
  width: 1.25rem;
  height: 1.25rem;
  border-radius: 50%;
  background: var(--accent);
  color: var(--bg-panel);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  font-style: normal;
  line-height: 1.25rem;
  text-align: center;
}

.callout-title {
  margin: 0 0 0.3rem;
  font-weight: 700;
  color: var(--ink);
}

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

.callout-warning {
  border-left-color: var(--warn);
  background: color-mix(in srgb, var(--warn) 10%, var(--bg-panel));
}

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

.callout-success {
  border-left-color: var(--success);
  background: color-mix(in srgb, var(--success) 10%, var(--bg-panel));
}

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

/* ---------- 文末推广卡:品牌渐变整版 ---------- */

.post-promo {
  position: relative;
  overflow: hidden;
  margin-block: 2.4rem 0;
  padding: clamp(1.4rem, 3.4vw, 2.1rem);
  border-radius: var(--r-lg);
  background: linear-gradient(135deg, var(--accent-dark), var(--accent) 55%, var(--accent-2));
  box-shadow: var(--shadow-cta);
  color: var(--bg-panel);
}

.post-promo::after {
  content: "";
  position: absolute;
  right: -3rem;
  bottom: -4rem;
  width: 12rem;
  height: 12rem;
  border: 1px dashed rgba(255, 255, 255, 0.28);
  border-radius: 50%;
}

.post-promo .promo-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.82);
}

.post-promo .promo-brand i {
  display: inline-block;
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: var(--bg-panel);
}

.post-promo h3 {
  margin: 0.7rem 0 0.5rem;
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 2.8vw, 1.5rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--bg-panel);
  text-wrap: pretty;
}

.post-promo p {
  margin: 0;
  max-width: 40rem;
  font-size: 0.94rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.9);
}

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

.post-promo .btn-oncolor,
.post-promo .btn-ghost-oncolor {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.62rem 1.25rem;
  border-radius: var(--r-sm);
  font-size: 0.92rem;
  font-weight: 600;
  text-align: center;
  text-decoration: none;
  transition: transform 0.18s ease, background-color 0.18s ease, border-color 0.18s ease;
}

.post-promo .btn-oncolor {
  background: var(--bg-panel);
  border: 1px solid var(--bg-panel);
  color: var(--ink);
}

.post-promo .btn-oncolor:hover {
  transform: translateY(-1px);
}

.post-promo .btn-ghost-oncolor {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.65);
  color: var(--bg-panel);
}

.post-promo .btn-ghost-oncolor:hover {
  border-color: var(--bg-panel);
  background: rgba(255, 255, 255, 0.1);
}

/* ---------- 延伸阅读 / 上一篇下一篇 ---------- */

#related-posts {
  padding-top: 1.5rem;
  padding-bottom: 1.4rem;
}

#related-posts:empty {
  padding: 0;
}

.rail-title {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.rail-title::after {
  content: "";
  display: block;
  width: 2.6em;
  height: 2px;
  margin-top: 0.55rem;
  border-radius: var(--r-pill);
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
}

.rail-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 17rem), 1fr));
  gap: 1rem;
}

.rail-card {
  position: relative;
  padding: 1.1rem 1.15rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-panel);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.rail-card::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 1.15rem;
  right: 1.15rem;
  height: 2px;
  border-radius: var(--r-pill);
  background: var(--accent);
  opacity: 0;
  transition: opacity 0.2s ease;
}

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

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

.rail-card h3 {
  margin: 0.55rem 0 0.45rem;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.5;
  text-wrap: pretty;
}

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

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

.rail-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.86rem;
  line-height: 1.72;
}

#post-nav {
  padding-top: 1.5rem;
  padding-bottom: 2.6rem;
}

#post-nav:empty {
  padding: 0;
}

.nav-pair {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 16rem), 1fr));
  gap: 1rem;
}

.nav-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  padding: 1rem 1.15rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  text-decoration: none;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.nav-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent-22);
  box-shadow: var(--shadow-panel);
}

.nav-dir {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--accent);
}

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

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

/* ---------- 动效降级 ---------- */

@media (prefers-reduced-motion: reduce) {
  .post-card,
  .rail-card,
  .nav-card,
  .tag-filter button,
  .post-promo .btn-oncolor {
    transition: none;
  }

  .post-card:hover,
  .rail-card:hover,
  .nav-card:hover,
  .post-promo .btn-oncolor:hover {
    transform: none;
  }
}