/* ============================================================
   VPNAN · 博客样式
   列表页 + 文章页
   ============================================================ */

/* ---------- 通用工具 ---------- */
.no-break {
  white-space: nowrap;
}

/* ---------- 列表页 Hero ---------- */
.blog-hero {
  padding: clamp(3rem, 6vw, 5rem) 0 clamp(2rem, 4vw, 3rem);
  border-bottom: 1px solid var(--border);
}

.blog-hero-inner {
  max-width: 64rem;
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.blog-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  text-wrap: pretty;
  margin-bottom: 0.75rem;
}

.blog-hero p {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 40rem;
  margin: 0;
}

/* ---------- 列表容器 ---------- */
.blog-container {
  max-width: 64rem;
  margin-inline: auto;
  padding-inline: var(--gutter);
  padding-top: 1.5rem;
}

/* ---------- 标签筛选 ---------- */
.blog-tag-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0.5rem 0 1.5rem;
}

.tag-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.45rem 1rem;
  border: 1px solid var(--border);
  border-radius: 100px;
  background: var(--bg-panel);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1.4;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s, color 0.2s;
}

.tag-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.tag-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

/* ---------- 文章卡片 ---------- */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
  padding-bottom: 4rem;
}

.post-card {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 1.5rem;
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}

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

.post-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.post-card-tag {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  border-radius: 100px;
  background: var(--bg-panel2);
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 500;
  white-space: nowrap;
}

.post-card-date {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  white-space: nowrap;
}

.post-card-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.2rem;
  line-height: 1.4;
  letter-spacing: -0.01em;
  text-wrap: pretty;
  margin-bottom: 0.5rem;
}

.post-card-summary {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 1rem;
}

.post-card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--accent);
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  transition: color 0.2s;
}

.post-card-link:hover {
  color: var(--accent-dark);
}

.blog-empty {
  text-align: center;
  color: var(--text-muted);
  padding: 3rem 0;
}

/* ============================================================
   文章页
   ============================================================ */
.article-page main {
  padding-inline: 0;
  overflow-x: clip;
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  max-width: calc(56rem + 2 * var(--gutter));
  margin: 1.5rem auto 0.5rem;
  padding-inline: var(--gutter);
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.breadcrumb a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s;
}

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

.breadcrumb .crumb-sep {
  margin: 0 0.5rem;
  color: var(--border);
}

/* ---------- 文章 Hero(full-bleed-band) ---------- */
.article-hero {
  width: 100%;
  padding: clamp(2.5rem, 5vw, 4rem) max(1.5rem, var(--gutter));
  background: var(--tint-accent);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  position: relative;
}

.article-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(var(--border) 1px, transparent 1px);
  background-size: 16px 16px;
  opacity: 0.25;
  pointer-events: none;
}

.article-hero-inner {
  position: relative;
  z-index: 1;
  max-width: calc(56rem + 2 * var(--gutter));
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.article-meta .meta-sep {
  color: var(--border);
  user-select: none;
}

.article-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  line-height: 1.25;
  letter-spacing: -0.02em;
  text-wrap: pretty;
  margin-bottom: 0.75rem;
}

.article-summary {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 42rem;
  margin: 0;
}

/* ---------- 阅读列 ---------- */
.reading-wrap {
  max-width: calc(56rem + 2 * var(--gutter));
  width: 100%;
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---------- 正文排版 ---------- */
.article-body {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text);
  padding-top: 2.5rem;
  padding-bottom: 1rem;
  counter-reset: h2-counter;
}

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

.article-body p {
  margin: 1rem 0;
}

.article-body h2 {
  counter-increment: h2-counter;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.6rem;
  line-height: 1.4;
  letter-spacing: -0.01em;
  text-wrap: pretty;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
}

.article-body h2::before {
  content: counter(h2-counter, decimal-leading-zero) ". ";
  color: var(--accent);
  font-family: var(--font-mono);
  font-weight: 700;
}

.article-body h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.3rem;
  line-height: 1.4;
  letter-spacing: -0.01em;
  text-wrap: pretty;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

.article-body ul,
.article-body ol {
  padding-left: 1.5rem;
  margin: 1rem 0;
}

.article-body li {
  margin-bottom: 0.4rem;
}

.article-body a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color 0.2s;
}

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

.article-body code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--bg-panel2);
  padding: 0.15em 0.4em;
  border-radius: 4px;
  overflow-wrap: anywhere;
}

.article-body blockquote {
  border-left: 3px solid var(--border);
  padding-left: 1rem;
  color: var(--text-muted);
  margin: 1.5rem 0;
}

/* ---------- 表格 ---------- */
.article-body .table-scroll {
  overflow-x: auto;
  max-width: 100%;
  margin: 1.5rem 0;
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  line-height: 1.6;
}

.article-body thead th {
  background: var(--text);
  color: #fff;
  padding: 0.6rem 0.8rem;
  text-align: left;
  font-weight: 600;
  white-space: nowrap;
}

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

.article-body tbody tr:hover {
  background: var(--tint-accent);
}

.article-body th,
.article-body td {
  padding: 0.6rem 0.8rem;
  border: 1px solid var(--border);
}

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

/* ---------- pre code(终端窗) ---------- */
.article-body pre {
  background: #1e1a14;
  color: #e8e0d0;
  border-radius: var(--r-sm);
  padding: 1.25rem 1.5rem;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.7;
  margin: 1.5rem 0;
  position: relative;
}

.article-body pre::before {
  content: '';
  display: block;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--error);
  box-shadow: 16px 0 0 var(--warn), 32px 0 0 var(--success);
  margin-bottom: 0.75rem;
}

.article-body pre code {
  background: none;
  padding: 0;
  font-family: inherit;
  font-size: inherit;
  color: inherit;
  overflow-wrap: normal;
}

/* ---------- callout ---------- */
.article-body .callout {
  position: relative;
  padding: 1rem 1.25rem 1rem 2.5rem;
  margin: 1.5rem 0;
  border-left: 3px solid var(--accent);
  background: var(--tint-accent);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
}

.article-body .callout::before {
  content: '!';
  position: absolute;
  left: 0.75rem;
  top: 1.25rem;
  width: 1.4rem;
  height: 1.4rem;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.article-body .callout.warning::before {
  background: var(--warn);
}

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

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

/* ---------- stat-grid ---------- */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}

.stat-card {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  padding: 1.25rem;
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent);
}

.stat-card:nth-child(even)::before {
  background: var(--warn);
}

.stat-num {
  font-family: var(--font-mono);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.2;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.35rem;
  line-height: 1.4;
}

/* ---------- check-list ---------- */
.check-list {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0;
}

.check-list li {
  padding: 0.75rem 1rem;
  margin-bottom: 0.5rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  line-height: 1.6;
}

/* ---------- verdict ---------- */
.verdict {
  border-left: 4px solid var(--accent);
  background: var(--tint-accent);
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
}

.verdict strong {
  display: block;
  margin-bottom: 0.35rem;
  color: var(--accent-dark);
}

/* ---------- 文末推广块 ---------- */
.promo-block {
  max-width: calc(56rem + 2 * var(--gutter));
  margin: 2rem auto 0;
  padding: 2rem max(1.5rem, var(--gutter));
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  border-radius: var(--r-md);
  color: #fff;
  text-align: center;
}

.promo-block-brand {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.5rem;
  letter-spacing: -0.01em;
  margin-bottom: 0.75rem;
}

.promo-block-text {
  max-width: 34rem;
  margin: 0 auto 1.25rem;
  font-size: 0.95rem;
  line-height: 1.6;
  opacity: 0.95;
}

.promo-block-btn {
  display: inline-block;
  padding: 0.7rem 1.75rem;
  background: #fff;
  color: var(--accent-dark);
  border-radius: 100px;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  transition: transform 0.2s, box-shadow 0.2s;
}

.promo-block-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* ---------- 延伸阅读 ---------- */
#related-posts {
  max-width: calc(56rem + 2 * var(--gutter));
  margin-inline: auto;
  padding: 2rem var(--gutter) 1rem;
}

#related-posts > h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.3rem;
  letter-spacing: -0.01em;
  text-wrap: pretty;
  margin-bottom: 1rem;
}

.related-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}

.related-card {
  display: block;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  padding: 1.25rem;
  text-decoration: none;
  color: var(--text);
  border-top: 3px solid transparent;
  transition: border-color 0.2s, transform 0.2s;
}

.related-card:hover {
  border-top-color: var(--accent);
  transform: translateY(-2px);
}

.related-card-tag {
  display: inline-block;
  font-size: 0.75rem;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.related-card-title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: -0.01em;
  text-wrap: pretty;
  margin-bottom: 0.5rem;
}

.related-card-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ---------- 上一篇/下一篇 ---------- */
#post-nav {
  max-width: calc(56rem + 2 * var(--gutter));
  margin-inline: auto;
  padding: 1rem var(--gutter) 2rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.post-nav-link {
  display: block;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  padding: 1rem 1.25rem;
  text-decoration: none;
  color: var(--text);
  transition: border-color 0.2s;
}

.post-nav-link:hover {
  border-color: var(--accent);
}

.post-nav-prev {
  text-align: left;
}

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

.post-nav-label {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}

.post-nav-title {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: -0.01em;
  text-wrap: pretty;
}

/* ---------- 浮动 CTA(文章页) ---------- */
.float-cta {
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  z-index: 60;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.25rem;
  background: var(--text);
  color: #fff;
  border-radius: 100px;
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;
  box-shadow: 0 6px 20px rgba(41, 33, 21, 0.2);
  transition: transform 0.2s, background 0.2s;
}

.float-cta:hover {
  transform: translateY(-2px);
  background: var(--accent-dark);
}

@media (max-width: 640px) {
  .float-cta {
    right: 0.75rem;
    bottom: 0.75rem;
    left: 0.75rem;
    justify-content: center;
  }
}

/* ---------- 移动端适配 ---------- */
@media (max-width: 640px) {
  .blog-grid {
    grid-template-columns: 1fr;
  }

  .article-hero {
    padding-left: max(1.25rem, var(--gutter-sm));
    padding-right: max(1.25rem, var(--gutter-sm));
  }

  .article-hero-inner {
    padding-inline: 0;
  }

  .reading-wrap {
    padding-inline: var(--gutter-sm);
  }

  #related-posts,
  #post-nav {
    padding-inline: var(--gutter-sm);
  }

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