/* ============================================
   VPNXE 博客系统样式
   ============================================ */

/* 基础覆盖 */
.no-break {
  white-space: nowrap;
}

/* ============================================
   博客列表页
   ============================================ */

.blog-index {
  padding: 0 0 4rem;
}

.blog-hero {
  max-width: var(--maxw);
  margin-inline: auto;
  padding: 3rem var(--gutter) 2rem;
}

.blog-hero h1 {
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 800;
  color: var(--text);
  line-height: 1.2;
  margin-bottom: 0.75rem;
  text-wrap: pretty;
  letter-spacing: -0.01em;
}

.blog-hero p {
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.6;
  max-width: 38rem;
}

.blog-filters {
  max-width: var(--maxw);
  margin-inline: auto;
  padding: 0 var(--gutter);
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
}

.filter-btn {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  padding: 0.5rem 1.1rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s, color 0.2s;
}

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

.filter-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--lift);
}

.blog-cards {
  max-width: var(--maxw);
  margin-inline: auto;
  padding: 0 var(--gutter);
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.blog-empty {
  color: var(--muted);
  font-size: 1rem;
  padding: 2rem 0;
  text-align: center;
}

.blog-card {
  display: block;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--r-m);
  padding: 1.5rem;
  text-decoration: none;
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}

.blog-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent);
  box-shadow: var(--shadow-lift);
}

.blog-card-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.blog-card-meta .badge {
  background: var(--accent-tint);
  color: var(--accent-dark);
}

.blog-card-meta time {
  color: var(--muted);
  font-size: 0.8rem;
  font-family: var(--font-mono);
}

.blog-card-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.4;
  margin-bottom: 0.5rem;
  text-wrap: pretty;
}

.blog-card-summary {
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ============================================
   文章页(magazine-rule hero)
   ============================================ */

.article-page {
  padding: 0 0 3rem;
}

.article-breadcrumb {
  max-width: calc(56rem + 2 * var(--gutter));
  margin-inline: auto;
  padding-inline: var(--gutter);
  padding-top: 1.5rem;
  margin-bottom: 1.25rem;
}

.article-breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  padding: 0;
  margin: 0;
  font-size: 0.85rem;
}

.article-breadcrumb li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.article-breadcrumb li + li::before {
  content: '/';
  color: var(--muted);
  margin-right: 0.5rem;
}

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

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

.article-breadcrumb .current {
  color: var(--text);
  font-weight: 600;
}

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

.article-hero {
  padding-top: 0.5rem;
}

.article-hero::before {
  content: '';
  display: block;
  height: 4px;
  background: linear-gradient(90deg, var(--accent) 0%, var(--accent-dark) 100%);
  border-radius: var(--r-s);
  margin-bottom: 1rem;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.article-meta .badge {
  background: var(--accent);
  color: var(--lift);
}

.article-meta time,
.article-meta .read-time {
  color: var(--muted);
  font-size: 0.85rem;
  font-family: var(--font-mono);
}

.article-hero h1 {
  font-size: clamp(1.8rem, 3.2vw, 2.6rem);
  font-weight: 800;
  color: var(--text);
  line-height: 1.25;
  margin: 0 0 1rem;
  text-wrap: pretty;
  letter-spacing: -0.01em;
}

.article-summary {
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--muted);
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 0;
}

.reading-wrap {
  padding-top: 0;
  padding-bottom: 0;
}

.article-content {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text);
  padding-top: 0;
  counter-reset: h2counter;
}

/* ============================================
   正文排版
   ============================================ */

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

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

.article-content li {
  margin: 0.35rem 0;
}

.article-content a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
  text-decoration-color: var(--accent-tint2);
  transition: color 0.2s, text-decoration-color 0.2s;
}

.article-content a:hover {
  color: var(--accent-dark);
  text-decoration-color: var(--accent-dark);
}

.article-content blockquote {
  border-left: 4px solid var(--accent);
  background: var(--accent-tint);
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
  border-radius: 0 var(--r-s) var(--r-s) 0;
  color: var(--text);
  font-style: italic;
}

.article-content img {
  max-width: 100%;
  border-radius: var(--r-m);
  margin: 1.5rem auto;
  display: block;
}

.article-content h2 {
  counter-increment: h2counter;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text);
  line-height: 1.4;
  margin: 2.5rem 0 1rem;
  text-wrap: pretty;
  letter-spacing: -0.01em;
}

.article-content h2::before {
  content: counter(h2counter) '. ';
  color: var(--accent);
  font-weight: 800;
}

.article-content h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.4;
  margin: 1.75rem 0 0.75rem;
  text-wrap: pretty;
}

.article-content h4 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text);
  margin: 1.25rem 0 0.5rem;
}

/* ============================================
   富文本组件
   ============================================ */

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin: 2rem 0;
}

.stat-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--r-m);
  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(2n)::before {
  background: var(--accent-dark);
}

.stat-card:nth-child(3n)::before {
  background: var(--panel2);
}

.stat-num {
  display: block;
  font-size: 2rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--text);
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
}

.stat-label {
  display: block;
  margin-top: 0.35rem;
  color: var(--muted);
  font-size: 0.875rem;
  line-height: 1.4;
}

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

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

.verdict {
  border-left: 4px solid var(--accent);
  background: var(--accent-tint);
  padding: 1rem 1.25rem;
  border-radius: 0 var(--r-s) var(--r-s) 0;
  margin: 1.5rem 0;
  line-height: 1.7;
}

.verdict strong {
  color: var(--accent-dark);
  font-weight: 800;
}

.callout {
  position: relative;
  background: var(--bg-soft);
  border-left: 4px solid var(--accent);
  border-radius: 0 var(--r-s) var(--r-s) 0;
  padding: 1rem 1.25rem 1rem 2.5rem;
  margin: 1.5rem 0;
  line-height: 1.7;
}

.callout::before {
  content: '!';
  position: absolute;
  left: 0.75rem;
  top: 1rem;
  width: 1.25rem;
  height: 1.25rem;
  border-radius: 50%;
  background: var(--accent);
  color: var(--lift);
  font-weight: 800;
  font-size: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

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

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

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

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

.table-wrap {
  overflow-x: auto;
  margin: 1.5rem 0;
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  line-height: 1.5;
}

.article-content thead th {
  background: var(--text);
  color: var(--panel);
  font-weight: 600;
  padding: 0.75rem 1rem;
  text-align: left;
  white-space: nowrap;
}

.article-content tbody td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-soft);
}

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

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

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

.article-content pre {
  background: var(--text);
  border-radius: var(--r-m);
  padding: 1.25rem 1.5rem;
  overflow-x: auto;
  position: relative;
  margin: 1.5rem 0;
}

.article-content pre::before {
  content: 'terminal';
  display: block;
  width: fit-content;
  background: rgba(255, 255, 255, 0.12);
  color: var(--panel);
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.2rem 0.6rem;
  border-radius: var(--r-pill);
  margin-bottom: 0.75rem;
  font-family: var(--font-mono);
  letter-spacing: 0.05em;
}

.article-content pre code {
  background: transparent;
  color: var(--panel);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.7;
  padding: 0;
}

.article-content code {
  background: var(--panel2);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.875em;
  padding: 0.15em 0.4em;
  border-radius: 4px;
}

/* ============================================
   文末推广卡
   ============================================ */

.promo-block {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
  border-radius: var(--r-l);
  padding: 2rem 2.5rem;
  margin: 3rem 0 2rem;
}

.promo-block-text {
  flex: 1;
}

.promo-block-title {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--lift);
  margin-bottom: 0.35rem;
  letter-spacing: -0.01em;
}

.promo-block-desc {
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.95rem;
  line-height: 1.6;
}

.promo-block .btn-main {
  background: var(--lift);
  color: var(--accent-dark);
  box-shadow: none;
  white-space: nowrap;
}

.promo-block .btn-main:hover {
  background: var(--bg-soft);
  box-shadow: 0 6px 16px -6px rgba(0, 0, 0, 0.2);
}

.promo-block .btn-ghost {
  border-color: rgba(255, 255, 255, 0.6);
  color: var(--lift);
}

.promo-block .btn-ghost:hover {
  border-color: var(--lift);
  background: rgba(255, 255, 255, 0.1);
}

/* ============================================
   延伸阅读与上下篇
   ============================================ */

#related-posts {
  padding-top: 2rem;
  margin-top: 0;
  margin-bottom: 0;
}

#related-posts h2 {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 1rem;
  text-wrap: pretty;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

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

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

.related-badge {
  display: inline-block;
  background: var(--accent-tint);
  color: var(--accent-dark);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.6rem;
  border-radius: var(--r-pill);
  margin-bottom: 0.5rem;
}

.related-title {
  display: block;
  font-weight: 700;
  color: var(--text);
  line-height: 1.4;
  margin-bottom: 0.5rem;
  text-wrap: pretty;
}

.related-date {
  color: var(--muted);
  font-size: 0.8rem;
  font-family: var(--font-mono);
}

#post-nav {
  padding-bottom: 2rem;
  margin-top: 0;
  margin-bottom: 0;
}

.post-nav-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.post-nav-card {
  display: block;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--r-m);
  padding: 1rem 1.25rem;
  text-decoration: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

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

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

.post-nav-title {
  display: block;
  font-weight: 700;
  color: var(--text);
  line-height: 1.4;
  text-wrap: pretty;
}

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

/* ============================================
   响应式
   ============================================ */

@media (max-width: 768px) {
  .blog-cards {
    grid-template-columns: 1fr;
  }

  .related-grid {
    grid-template-columns: 1fr;
  }

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

  .promo-block {
    flex-direction: column;
    text-align: center;
  }

  .promo-block .btn-main {
    white-space: normal;
  }
}

@media (prefers-reduced-motion: reduce) {
  .blog-card,
  .related-card,
  .post-nav-card,
  .filter-btn {
    transition: none;
  }
}