/* ==========================================================================
   VPNWI · 博客系统样式
   列表页 zh-CN/blog/index.html 与文章页 zh-CN/blog/articles/*.html 共用。
   颜色 / 字体 / 圆角 / 阴影一律引用 base.css 的 :root 令牌，不写死色值。
   ========================================================================== */

:root {
  --blog-col: 56rem;                              /* 正文阅读列宽 */
  --blog-pad: 1.5rem;                             /* 列内衬：hero 与正文同值 */
  --blog-shell: calc(var(--blog-col) + 2 * var(--blog-pad));
  --blog-gap: clamp(1.1rem, 2.4vw, 1.6rem);
}

/* --------------------------------------------------------------------------
   1 · 阅读列：面包屑 / 文章 hero / 正文 / 文末推广共用同一条列
   -------------------------------------------------------------------------- */
.blog-shell,
.reading-wrap {
  width: 100%;
  max-width: var(--blog-shell);
  margin-inline: auto;
  padding-inline: var(--blog-pad);
}

.blog-crumb {
  width: 100%;
  max-width: var(--blog-shell);
  margin: 1.6rem auto .9rem;
  padding-inline: var(--blog-pad);
  font-size: .84rem;
  line-height: 1.7;
  color: var(--text-muted);
}

.blog-crumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .4rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.blog-crumb li {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
}

.blog-crumb li + li::before {
  content: "/";
  color: var(--text-faint);
}

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

.blog-crumb a:hover {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: .18em;
}

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

/* --------------------------------------------------------------------------
   2 · 窗口 chrome（站点母题：窗口栏卡片）
   -------------------------------------------------------------------------- */
.window-card {
  position: relative;
  overflow: hidden;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r-l);
  box-shadow: var(--shadow-1);
}

.window-bar {
  display: flex;
  align-items: center;
  gap: .8rem;
  padding: .62rem 1rem;
  background: linear-gradient(180deg, var(--bg-panel-2), color-mix(in srgb, var(--bg-panel-2) 65%, var(--bg-panel)));
  border-top: 2px solid var(--accent-2);
  border-bottom: 1px solid var(--border-soft);
}

.win-dots {
  display: inline-flex;
  flex: none;
  gap: .32rem;
}

.win-dots i {
  display: block;
  width: .58rem;
  height: .58rem;
  border-radius: 50%;
  background: var(--border);
}

.win-dots i:nth-child(1) {
  background: var(--error);
}

.win-dots i:nth-child(2) {
  background: var(--warn);
}

.win-dots i:nth-child(3) {
  background: var(--success);
}

.win-file {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .01em;
  color: var(--text-muted);
}

.window-body {
  padding: clamp(1.5rem, 3vw, 2.2rem) clamp(1.5rem, 3vw, 2.1rem) clamp(1.7rem, 3.4vw, 2.4rem);
}

/* --------------------------------------------------------------------------
   3 · 列表页：hero / 筛选 / 卡片网格
   -------------------------------------------------------------------------- */
.blog-hero {
  padding-top: clamp(1.6rem, 3.4vw, 2.6rem);
}

.blog-hero-title {
  margin: 0 0 .7rem;
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3.6vw, 2.75rem);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -.02em;
  color: var(--text);
  text-wrap: pretty;
}

.blog-kicker {
  display: inline-block;
  margin: 0 0 .9rem;
  padding: .22rem .7rem;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .08em;
  color: var(--accent-dark);
  background: var(--tint-accent);
  border: 1px solid color-mix(in srgb, var(--accent) 22%, transparent);
  border-radius: var(--r-pill);
}

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

.blog-list {
  padding-bottom: clamp(2rem, 4vw, 3rem);
}

.blog-list-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: .5rem 1rem;
  margin: clamp(1.8rem, 3.4vw, 2.6rem) 0 .9rem;
}

.blog-list-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--text);
}

.blog-list-count {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .78rem;
  color: var(--text-faint);
}

.blog-filter {
  display: flex;
  flex-wrap: wrap;
  gap: .55rem;
  margin-bottom: clamp(1.2rem, 2.4vw, 1.7rem);
}

.blog-filter .chip {
  cursor: pointer;
  font-family: var(--font-body);
  font-size: .86rem;
  line-height: 1.7;
}

.blog-filter .chip.is-on {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--bg-panel);
  font-weight: 600;
}

.post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 20rem), 1fr));
  gap: var(--blog-gap);
  align-items: stretch;
}

.post-grid[hidden],
.blog-empty[hidden],
#related-posts[hidden],
#post-nav[hidden] {
  display: none;
}

.post-grid .post-card {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 1.25rem 1.3rem 1.15rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r-l);
  box-shadow: var(--shadow-1);
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}

.post-grid .post-card:hover {
  transform: translateY(-3px);
  border-color: color-mix(in srgb, var(--accent) 32%, var(--border));
  box-shadow: var(--shadow-2);
}

.post-grid .post-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem .6rem;
  margin-bottom: .7rem;
}

.post-grid .post-tag {
  padding: .2rem .62rem;
  font-size: .74rem;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--accent-dark);
  background: var(--tint-accent);
  border-radius: var(--r-pill);
}

.post-grid .post-date {
  font-family: var(--font-mono);
  font-size: .76rem;
  color: var(--text-faint);
}

.post-grid .post-title {
  margin: 0 0 .55rem;
  font-family: var(--font-display);
  font-size: 1.14rem;
  font-weight: 700;
  line-height: 1.42;
  letter-spacing: -.01em;
  color: var(--text);
  text-wrap: pretty;
}

.post-grid .post-title a {
  color: inherit;
  text-decoration: none;
}

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

.post-grid .post-summary {
  margin: 0 0 1rem;
  font-size: .92rem;
  line-height: 1.8;
  color: var(--text-muted);
}

.post-grid .post-more {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  margin-top: auto;
  font-size: .88rem;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
}

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

.post-grid .post-more svg {
  transition: transform .18s ease;
}

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

.blog-empty {
  margin: 1.5rem 0;
  padding: 1.6rem 1.2rem;
  text-align: center;
  font-size: .94rem;
  color: var(--text-muted);
  background: var(--bg-panel);
  border: 1px dashed var(--border);
  border-radius: var(--r-l);
}

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

/* --------------------------------------------------------------------------
   4 · 文章页 hero（窗口栏卡片版式）
   -------------------------------------------------------------------------- */
.article-hero {
  width: 100%;
  max-width: var(--blog-shell);
  margin: 0 auto clamp(1.8rem, 3.6vw, 2.6rem);
  padding: 0;
  overflow: hidden;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r-l);
  box-shadow: var(--shadow-1);
}

.article-hero-body {
  padding: 1.9rem var(--blog-pad) 2.2rem;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem .6rem;
  margin: 0 0 1rem;
}

.article-meta .post-tag {
  padding: .24rem .7rem;
  font-size: .76rem;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--bg-panel);
  background: var(--accent);
  border-radius: var(--r-pill);
}

.article-meta .post-date,
.article-meta .read-time {
  padding: .2rem .68rem;
  font-family: var(--font-mono);
  font-size: .76rem;
  color: var(--text-muted);
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
}

.article-hero h1 {
  margin: 0 0 .8rem;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.2vw, 2.5rem);
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: -.02em;
  color: var(--text);
  text-wrap: pretty;
}

.article-lead {
  margin: 0;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--text-muted);
}

/* --------------------------------------------------------------------------
   5 · 正文排版
   -------------------------------------------------------------------------- */
.prose {
  counter-reset: blog-sec;
  font-size: 1rem;
  line-height: 1.9;
  color: var(--text);
}

.prose p {
  margin: 0 0 1.15rem;
}

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

.prose h2 {
  counter-increment: blog-sec;
  margin: 2.6rem 0 .9rem;
  padding-top: 1.5rem;
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 2.1vw, 1.6rem);
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: -.015em;
  color: var(--text);
  border-top: 1px solid var(--border-soft);
  text-wrap: pretty;
}

.prose h2::before {
  content: counter(blog-sec, decimal-leading-zero);
  display: inline-block;
  margin-right: .6rem;
  font-family: var(--font-mono);
  font-size: .72em;
  font-weight: 600;
  letter-spacing: 0;
  color: var(--accent);
}

.prose h3 {
  margin: 1.9rem 0 .65rem;
  font-family: var(--font-display);
  font-size: clamp(1.08rem, 1.6vw, 1.28rem);
  font-weight: 700;
  line-height: 1.45;
  letter-spacing: -.01em;
  color: var(--text);
  text-wrap: pretty;
}

.prose a {
  color: var(--accent);
  text-underline-offset: .18em;
}

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

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

.prose li {
  margin: .35rem 0;
}

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

.prose blockquote {
  margin: 1.6rem 0;
  padding: .9rem 1.2rem;
  color: var(--text-muted);
  background: color-mix(in srgb, var(--bg-panel-2) 42%, var(--bg-panel));
  border-left: 3px solid var(--border);
  border-radius: 0 var(--r-s) var(--r-s) 0;
}

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

.prose code {
  padding: .12em .38em;
  font-family: var(--font-mono);
  font-size: .88em;
  color: var(--accent-dark);
  background: var(--tint-accent-2);
  border-radius: var(--r-s);
}

.prose pre {
  position: relative;
  margin: 1.6rem 0;
  padding: 2.5rem 1.15rem 1.15rem;
  overflow-x: auto;
  font-size: .88rem;
  line-height: 1.75;
  color: var(--bg-panel);
  background: var(--accent-dark);
  border-radius: var(--r-m);
  box-shadow: var(--shadow-1);
}

.prose pre::before {
  content: "";
  position: absolute;
  top: 1.05rem;
  left: 1.15rem;
  width: .5rem;
  height: .5rem;
  border-radius: 50%;
  background: var(--error);
  box-shadow: .85rem 0 0 var(--warn), 1.7rem 0 0 var(--success);
}

.prose pre code {
  padding: 0;
  font-size: 1em;
  color: inherit;
  background: none;
}

/* 表格：实色表头 + 斑马纹 + hover */
.prose .table-scroll {
  max-width: 100%;
  margin: 1.5rem 0;
  overflow-x: auto;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  font-size: .93rem;
  line-height: 1.65;
}

.prose thead th {
  padding: .7rem .85rem;
  font-weight: 600;
  text-align: left;
  color: var(--bg-panel);
  background: var(--accent-dark);
  border: 1px solid var(--accent-dark);
}

.prose tbody td {
  padding: .68rem .85rem;
  vertical-align: top;
  color: var(--text);
  border: 1px solid var(--border-soft);
}

.prose tbody tr:nth-child(even) td {
  background: color-mix(in srgb, var(--bg-panel-2) 45%, var(--bg-panel));
}

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

/* --------------------------------------------------------------------------
   6 · 正文富组件：callout / stat-grid / check-list / verdict
   -------------------------------------------------------------------------- */
.callout {
  position: relative;
  margin: 1.6rem 0;
  padding: 1rem 1.15rem 1rem 3rem;
  font-size: .96rem;
  line-height: 1.8;
  color: var(--text);
  background: var(--tint-accent);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--r-m) var(--r-m) 0;
}

.callout::before {
  content: "i";
  position: absolute;
  top: 1rem;
  left: 1rem;
  width: 1.35rem;
  height: 1.35rem;
  font-family: var(--font-mono);
  font-size: .8rem;
  line-height: 1.35rem;
  text-align: center;
  color: var(--bg-panel);
  background: var(--accent);
  border-radius: 50%;
}

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

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

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

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

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

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(9.5rem, 1fr));
  gap: .9rem;
  margin: 1.6rem 0;
}

.stat-card {
  position: relative;
  overflow: hidden;
  padding: 1.15rem 1.1rem 1.05rem;
  background: var(--bg-panel);
  border: 1px solid var(--border-soft);
  border-radius: var(--r-m);
  box-shadow: var(--shadow-1);
}

.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) 55%, var(--bg-panel));
}

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

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

.stat-label {
  display: block;
  margin-top: .35rem;
  font-size: .86rem;
  line-height: 1.65;
  color: var(--text-muted);
}

.check-list {
  display: grid;
  gap: .55rem;
  margin: 1.4rem 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  margin: 0;
  padding: .7rem .95rem;
  font-size: .95rem;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg-panel);
  border: 1px solid var(--border-soft);
  border-left: 3px solid var(--border);
  border-radius: var(--r-s);
}

.prose .check-list {
  padding-left: 0;
}

.prose .check-list li {
  margin: 0;
}

.verdict {
  margin: 1.6rem 0;
  padding: 1rem 1.15rem;
  font-size: .97rem;
  line-height: 1.8;
  color: var(--text);
  background: var(--tint-accent);
  border-left: 4px solid var(--accent);
  border-radius: 0 var(--r-m) var(--r-m) 0;
}

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

/* --------------------------------------------------------------------------
   7 · 文末推广块（品牌渐变 + 彩底重配色按钮）
   -------------------------------------------------------------------------- */
.promo-block {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.1rem 1.4rem;
  margin: clamp(2rem, 4vw, 2.8rem) 0 0;
  padding: 1.5rem 1.6rem;
  overflow: hidden;
  background-color: var(--accent-dark);
  background-image:
    radial-gradient(circle at 1px 1px, color-mix(in srgb, var(--bg-panel) 14%, transparent) 1px, transparent 0),
    linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
  background-size: 16px 16px, 100% 100%;
  border: 1px solid color-mix(in srgb, var(--accent) 30%, var(--border));
  border-radius: var(--r-l);
  box-shadow: var(--shadow-2);
}

.promo-block .promo-title {
  margin: 0 0 .35rem;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--bg-panel);
}

.promo-block .promo-text {
  margin: 0;
  font-size: .92rem;
  line-height: 1.75;
  color: color-mix(in srgb, var(--bg-panel) 84%, var(--accent-2));
}

.promo-block .promo-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
}

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

.promo-block .btn-primary:hover {
  background: color-mix(in srgb, var(--bg-panel) 88%, var(--accent-2));
  border-color: color-mix(in srgb, var(--bg-panel) 88%, var(--accent-2));
}

.promo-block .btn-secondary {
  color: var(--bg-panel);
  background: transparent;
  border-color: color-mix(in srgb, var(--bg-panel) 60%, transparent);
}

.promo-block .btn-secondary:hover {
  background: color-mix(in srgb, var(--bg-panel) 16%, transparent);
}

/* --------------------------------------------------------------------------
   8 · 上一篇 / 下一篇 + 延伸阅读
   -------------------------------------------------------------------------- */
.post-nav {
  display: grid;
  gap: 1rem;
  margin-top: clamp(2rem, 4vw, 2.8rem);
  padding-top: 2rem;
  padding-bottom: 2rem;
  border-top: 1px solid var(--border-soft);
}

.post-nav--pair {
  grid-template-columns: 1fr 1fr;
}

.post-nav-card {
  display: block;
  padding: 1rem 1.15rem;
  color: var(--text);
  text-decoration: none;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r-m);
  box-shadow: var(--shadow-1);
  transition: transform .18s ease, border-color .18s ease, box-shadow .18s ease;
}

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

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

.post-nav-label {
  display: block;
  margin-bottom: .35rem;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .06em;
  color: var(--text-faint);
}

.post-nav-title {
  display: block;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.5;
  text-wrap: pretty;
}

#related-posts {
  padding-top: 2.5rem;
}

#related-posts:empty,
#post-nav:empty {
  display: none;
}

.related-title {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 1.8vw, 1.35rem);
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--text);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 14rem), 1fr));
  gap: 1rem;
}

.related-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: .55rem;
  padding: 1.05rem 1.15rem 1.15rem;
  color: var(--text);
  text-decoration: none;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r-m);
  box-shadow: var(--shadow-1);
  transition: transform .18s ease, border-color .18s ease, box-shadow .18s ease;
}

.related-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: var(--accent-2);
  border-radius: var(--r-m) var(--r-m) 0 0;
  opacity: 0;
  transition: opacity .18s ease;
}

.related-card:hover {
  transform: translateY(-2px);
  border-color: color-mix(in srgb, var(--accent) 32%, var(--border));
  box-shadow: var(--shadow-2);
}

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

.related-card .post-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .45rem .55rem;
}

.related-card-tag {
  padding: .16rem .58rem;
  font-size: .72rem;
  font-weight: 600;
  color: var(--accent-dark);
  background: var(--tint-accent);
  border-radius: var(--r-pill);
}

.related-card-date {
  font-family: var(--font-mono);
  font-size: .74rem;
  color: var(--text-faint);
}

.related-card-title {
  display: block;
  font-family: var(--font-display);
  font-size: .98rem;
  font-weight: 600;
  line-height: 1.55;
  text-wrap: pretty;
}

/* --------------------------------------------------------------------------
   9 · 窄屏与动效降级
   -------------------------------------------------------------------------- */
@media (max-width: 900px) {
  .post-nav--pair {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 860px) {
  .prose table {
    display: table;
    width: 100%;
    min-width: 30rem;
  }
}

@media (max-width: 640px) {
  .blog-hero-title {
    font-size: 1.7rem;
  }

  .article-hero h1 {
    font-size: 1.6rem;
  }

  .promo-block {
    padding: 1.25rem 1.2rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .post-grid .post-card,
  .post-grid .post-more svg,
  .post-nav-card,
  .related-card,
  .related-card::before {
    transition: none;
  }

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

  .post-grid .post-more:hover svg {
    transform: none;
  }
}