/* VPNYN · 博客列表与文章页样式（zh-CN）
   阅读列宽 56rem ≈ 896px，面包屑 / hero / 正文 / 文末组件共用同一条列并居中 */

:root {
  --reading-col: 56rem;
}

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

/* ---------- 列表页 hero ---------- */

.blog-hero {
  padding-top: clamp(2.2rem, 5vw, 3.4rem);
  padding-bottom: clamp(1.4rem, 3vw, 2.1rem);
}

.blog-kicker {
  margin: 0 0 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
}

.blog-h1 {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.85rem, 4.4vw, 3rem);
  line-height: 1.22;
  letter-spacing: -0.015em;
  text-wrap: pretty;
  color: var(--text);
}

.blog-lede {
  max-width: 44rem;
  margin: 0;
  font-size: 1rem;
  line-height: 1.9;
  color: var(--muted);
}

.blog-list-sec {
  padding-bottom: clamp(3rem, 6vw, 4.5rem);
}

/* ---------- 筛选栏 ---------- */

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.9rem 1.4rem;
  padding-bottom: 1.1rem;
  margin-bottom: 1.9rem;
  border-bottom: 1px solid var(--border);
}

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

.tag-btn {
  font: inherit;
  font-size: 0.88rem;
  line-height: 1;
  min-height: 36px;
  padding: 0.62rem 1rem;
  color: var(--muted);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  cursor: pointer;
  transition: color 0.18s ease, background-color 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}

.tag-btn:hover {
  color: var(--accent-dark);
  border-color: color-mix(in srgb, var(--accent) 45%, var(--border));
}

.tag-btn.is-active {
  color: var(--panel);
  background: var(--accent);
  border-color: var(--accent);
  box-shadow: var(--shadow-chip);
}

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

/* ---------- 文章卡片 ---------- */

.post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 1.25rem;
}

.post-grid > * {
  min-width: 0;
}

.post-card {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  padding: 1.4rem 1.45rem 1.3rem;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-card);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.post-card:hover {
  transform: translateY(-4px);
  border-color: color-mix(in srgb, var(--accent) 32%, var(--border));
  box-shadow: var(--shadow-lift);
}

.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-meta > * {
  flex-shrink: 0;
}

.post-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  line-height: 1.52;
  letter-spacing: -0.01em;
  text-wrap: pretty;
}

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

.post-title a:hover,
.post-title a:focus-visible {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
}

.post-ex {
  flex: 1 1 auto;
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.82;
  color: var(--muted);
}

.post-more {
  align-self: flex-start;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
}

.post-more:hover,
.post-more:focus-visible {
  color: var(--accent-dark);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.list-empty {
  margin: 1.9rem 0 0;
  padding: 1.15rem 1.4rem;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--muted);
  background: var(--panel-2);
  border: 1px dashed var(--border-strong);
  border-radius: var(--r-md);
}

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

.breadcrumb {
  margin-top: 1.5rem;
  padding-top: 0.2rem;
  font-size: 0.83rem;
  color: var(--muted);
}

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

.breadcrumb li {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  min-width: 0;
}

.breadcrumb li + li::before {
  content: "/";
  color: color-mix(in srgb, var(--muted) 45%, transparent);
}

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

.breadcrumb a:hover,
.breadcrumb a:focus-visible {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

/* ---------- 文章 hero：split-meta ---------- */

.article-hero {
  padding-top: clamp(1.5rem, 3.4vw, 2.2rem);
  padding-bottom: clamp(1.7rem, 3.6vw, 2.4rem);
}

.article-hero::before {
  content: "";
  display: block;
  width: 68px;
  height: 3px;
  margin-bottom: 1.35rem;
  background: var(--accent);
  border-radius: var(--r-pill);
}

.article-hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 1fr);
  gap: 2rem;
  align-items: start;
}

.article-hero-main {
  grid-column: 1;
  grid-row: 1;
  min-width: 0;
}

.article-hero-meta {
  grid-column: 2;
  grid-row: 1;
  min-width: 0;
  padding: 1.15rem 1.5rem 1.2rem;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-card);
}

.article-h1 {
  margin: 0 0 0.85rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.65rem, 3.5vw, 2.6rem);
  line-height: 1.26;
  letter-spacing: -0.015em;
  text-wrap: pretty;
  color: var(--text);
}

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

.meta-list {
  display: grid;
  gap: 0.8rem;
  margin: 1rem 0 0;
  padding: 0;
}

.meta-list > div {
  display: grid;
  gap: 0.28rem;
  padding-top: 0.8rem;
  border-top: 1px solid var(--border-soft);
}

.meta-list > div:first-child {
  padding-top: 0;
  border-top: 0;
}

.meta-list dt {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.meta-list dd {
  margin: 0;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text);
}

/* ---------- 正文排版 ---------- */

.article-body {
  padding-top: clamp(1.4rem, 3vw, 2rem);
  padding-bottom: 1rem;
  counter-reset: sec;
}

.article-body p,
.article-body li {
  font-size: 1rem;
  line-height: 1.9;
  color: var(--text);
}

.article-body p {
  margin: 0 0 1.15rem;
}

.article-body h2 {
  counter-increment: sec;
  margin: 2.6rem 0 1rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.3rem, 2.1vw, 1.6rem);
  line-height: 1.42;
  letter-spacing: -0.01em;
  text-wrap: pretty;
  color: var(--text);
}

.article-body > h2:first-child {
  margin-top: 0;
}

.article-body h2::before {
  content: counter(sec, decimal-leading-zero);
  display: inline-block;
  margin-right: 0.55rem;
  padding: 0.14em 0.52em;
  font-family: var(--font-mono);
  font-size: 0.6em;
  font-weight: 700;
  vertical-align: 0.14em;
  color: var(--accent-dark);
  background: color-mix(in srgb, var(--accent) 12%, var(--panel));
  border-radius: var(--r-xs);
}

.article-body h3 {
  margin: 1.9rem 0 0.7rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.3rem;
  line-height: 1.5;
  letter-spacing: -0.01em;
  text-wrap: pretty;
  color: var(--text);
}

.article-body ul,
.article-body ol {
  margin: 0 0 1.2rem;
  padding-left: 1.35rem;
}

.article-body li {
  margin-bottom: 0.5rem;
}

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

.article-body a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.article-body a:hover,
.article-body a:focus-visible {
  color: var(--accent-dark);
}

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

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

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

.article-body blockquote {
  margin: 1.5rem 0;
  padding: 1rem 1.3rem;
  background: var(--panel-2);
  border-left: 4px solid var(--accent);
  border-radius: 0 var(--r-md) var(--r-md) 0;
}

.article-body blockquote p:last-child {
  margin-bottom: 0;
}

.article-body code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  padding: 0.12em 0.4em;
  color: var(--accent-dark);
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: var(--r-xs);
  overflow-wrap: anywhere;
}

.article-body pre {
  position: relative;
  margin: 1.5rem 0;
  padding: 2.6rem 1.25rem 1.15rem;
  overflow-x: auto;
  color: var(--bg-top);
  background: var(--text);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-window);
}

.article-body pre::before {
  content: "";
  position: absolute;
  top: 0.9rem;
  left: 1.25rem;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--coral);
  box-shadow: 16px 0 0 var(--amber), 32px 0 0 var(--sage);
}

.article-body pre code {
  padding: 0;
  font-size: 0.86rem;
  line-height: 1.75;
  color: inherit;
  background: none;
  border: 0;
}

/* ---------- 正文表格 ---------- */

.article-body table {
  width: 100%;
  margin: 1.5rem 0;
  font-size: 0.92rem;
  border: 1px solid var(--border);
  border-collapse: collapse;
  background: var(--panel);
}

.article-body thead th {
  padding: 0.7rem 0.9rem;
  font-weight: 600;
  text-align: left;
  color: var(--bg-top);
  background: var(--text);
  border-bottom: 1px solid var(--border);
}

.article-body td,
.article-body th {
  padding: 0.68rem 0.9rem;
  border-bottom: 1px solid var(--border-soft);
}

.article-body tbody tr:nth-child(odd) {
  background: color-mix(in srgb, var(--panel-2) 58%, var(--panel));
}

.article-body tbody tr:hover {
  background: color-mix(in srgb, var(--accent) 8%, var(--panel));
}

.article-body tbody tr:last-child td {
  border-bottom: 0;
}

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

/* ---------- 富文本组件：数据卡 / 勾叉清单 / 结论块 / 提示条 ---------- */

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(168px, 1fr));
  gap: 0.9rem;
  margin: 1.6rem 0;
}

.stat-grid > * {
  min-width: 0;
}

.stat-card {
  padding: 1.05rem 1.2rem 1.1rem;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-card);
}

.stat-card:nth-child(4n + 1) {
  border-top: 3px solid var(--accent);
  background: color-mix(in srgb, var(--accent) 7%, var(--panel));
}

.stat-card:nth-child(4n + 2) {
  border-top: 3px solid var(--amber);
  background: color-mix(in srgb, var(--amber) 12%, var(--panel));
}

.stat-card:nth-child(4n + 3) {
  border-top: 3px solid var(--sage);
  background: color-mix(in srgb, var(--sage) 12%, var(--panel));
}

.stat-card:nth-child(4n + 4) {
  border-top: 3px solid var(--mist);
  background: color-mix(in srgb, var(--mist) 12%, var(--panel));
}

.stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text);
}

.stat-label {
  display: block;
  margin-top: 0.32rem;
  font-size: 0.84rem;
  line-height: 1.65;
  color: var(--muted);
}

.check-list {
  display: grid;
  gap: 0.55rem;
  margin: 1.5rem 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  margin: 0;
  padding: 0.78rem 1rem;
  font-size: 0.96rem;
  line-height: 1.78;
  background: var(--panel);
  border: 1px solid var(--border);
  border-left: 3px solid color-mix(in srgb, var(--sage) 70%, var(--border));
  border-radius: var(--r-sm);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.check-list li:hover {
  transform: translateX(2px);
  box-shadow: var(--shadow-card);
}

.verdict {
  margin: 1.6rem 0;
  padding: 1rem 1.2rem;
  font-size: 0.98rem;
  line-height: 1.86;
  background: color-mix(in srgb, var(--accent) 6%, var(--panel));
  border-left: 4px solid var(--accent);
  border-radius: 0 var(--r-md) var(--r-md) 0;
}

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

.callout {
  position: relative;
  margin: 1.6rem 0;
  padding: 1.05rem 1.25rem 1.05rem 3.1rem;
  font-size: 0.96rem;
  line-height: 1.82;
  color: var(--text);
  background: color-mix(in srgb, var(--mist) 12%, var(--panel));
  border-left: 4px solid var(--mist);
  border-radius: 0 var(--r-md) var(--r-md) 0;
}

.callout::before {
  content: "i";
  position: absolute;
  left: 1.05rem;
  top: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 700;
  line-height: 1;
  color: var(--panel);
  background: var(--mist);
  border-radius: 50%;
}

.callout--warn {
  background: color-mix(in srgb, var(--warn) 12%, var(--panel));
  border-left-color: var(--warn);
}

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

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

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

/* ---------- 文末推广卡 ---------- */

.post-promo {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.2rem 1.6rem;
  margin: 2.4rem 0 0;
  padding: 1.7rem 1.6rem;
  color: var(--panel);
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-lift);
}

.post-promo-text {
  min-width: 0;
  flex: 1 1 16rem;
}

.post-promo-title {
  margin: 0 0 0.4rem;
  font-family: var(--font-display);
  font-size: 1.12rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--panel);
}

.post-promo-sub {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: color-mix(in srgb, var(--panel) 88%, transparent);
}

.post-promo-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  flex-shrink: 0;
}

.post-promo .promo-btn-solid,
.post-promo .promo-btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 1.25rem;
  font-size: 0.92rem;
  font-weight: 600;
  line-height: 1;
  white-space: nowrap;
  text-decoration: none;
  border-radius: var(--r-pill);
  transition: transform 0.18s ease, background-color 0.18s ease, color 0.18s ease;
}

.post-promo .promo-btn-solid {
  color: var(--accent-dark);
  background: var(--panel);
  border: 1px solid var(--panel);
}

.post-promo .promo-btn-solid:hover,
.post-promo .promo-btn-solid:focus-visible {
  transform: translateY(-2px);
  background: var(--bg-top);
}

.post-promo .promo-btn-ghost {
  color: var(--panel);
  background: color-mix(in srgb, var(--panel) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--panel) 62%, transparent);
}

.post-promo .promo-btn-ghost:hover,
.post-promo .promo-btn-ghost:focus-visible {
  transform: translateY(-2px);
  background: color-mix(in srgb, var(--panel) 22%, transparent);
}

/* ---------- 上下篇 / 延伸阅读（垫距合计 ≤5rem） ---------- */

#post-nav,
#related-posts {
  width: 100%;
  max-width: calc(var(--reading-col) + 2 * var(--gutter));
  margin-inline: auto;
  padding-inline: var(--gutter);
}

#post-nav {
  padding-top: 1.6rem;
  padding-bottom: 2.4rem;
}

#related-posts {
  padding-top: 2.4rem;
  padding-bottom: 2.4rem;
}

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

.post-nav-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
}

.post-nav-grid > * {
  min-width: 0;
}

.post-nav-card {
  display: block;
  padding: 1rem 1.2rem 1.05rem;
  text-decoration: none;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-card);
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.post-nav-card:hover,
.post-nav-card:focus-visible {
  transform: translateY(-3px);
  border-color: color-mix(in srgb, var(--accent) 40%, var(--border));
  box-shadow: var(--shadow-lift);
}

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

.post-nav-dir {
  display: block;
  margin-bottom: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--accent);
}

.post-nav-title {
  display: block;
  font-size: 0.96rem;
  font-weight: 600;
  line-height: 1.62;
  color: var(--text);
}

.related-head {
  margin: 0 0 1.1rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.24rem;
  line-height: 1.45;
  letter-spacing: -0.01em;
  text-wrap: pretty;
  color: var(--text);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1rem;
}

.related-grid > * {
  min-width: 0;
}

.related-card {
  position: relative;
  padding: 1.15rem 1.2rem 1.2rem;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-card);
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.related-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 1.2rem;
  right: 1.2rem;
  height: 2px;
  background: var(--accent);
  border-radius: var(--r-pill);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.24s ease;
}

.related-card:hover,
.related-card:focus-within {
  transform: translateY(-3px);
  border-color: color-mix(in srgb, var(--accent) 34%, var(--border));
  box-shadow: var(--shadow-lift);
}

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

.related-title {
  margin: 0.7rem 0 0.5rem;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.6;
  letter-spacing: -0.01em;
  text-wrap: pretty;
}

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

.related-title a:hover,
.related-title a:focus-visible {
  color: var(--accent);
}

.related-ex {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 响应式 ---------- */

@media (max-width: 860px) {
  .article-hero-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 1.2rem;
  }

  .article-hero-meta {
    grid-column: 1;
    grid-row: 1;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.75rem 1.2rem;
    padding: 1rem 1.5rem;
  }

  .article-hero-main {
    grid-column: 1;
    grid-row: 2;
  }

  .meta-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem 1.2rem;
    margin: 0;
  }

  .meta-list > div {
    padding-top: 0;
    border-top: 0;
  }

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

@media (max-width: 640px) {
  .filter-bar {
    align-items: flex-start;
  }

  .post-card {
    padding: 1.2rem 1.15rem 1.15rem;
  }

  .post-promo {
    padding: 1.4rem 1.35rem;
  }

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

  .post-promo .promo-btn-solid,
  .post-promo .promo-btn-ghost {
    flex: 1 1 auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .post-card,
  .post-nav-card,
  .related-card,
  .check-list li,
  .post-promo .promo-btn-solid,
  .post-promo .promo-btn-ghost {
    transition: none;
  }

  .post-card:hover,
  .post-nav-card:hover,
  .related-card:hover,
  .check-list li:hover,
  .post-promo .promo-btn-solid:hover,
  .post-promo .promo-btn-ghost:hover {
    transform: none;
  }

  .related-card::before {
    transform: scaleX(1);
    transition: none;
  }
}