/* ============================================================
   VPNYS 博客样式
   列表页 + 文章页(主题「通行清单」)
   ============================================================ */

.sprite {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

/* ---------- 列表页 Hero ---------- */

.blog-hero {
  padding-top: clamp(2.5rem, 6vw, 4.5rem);
  padding-bottom: clamp(1.5rem, 4vw, 2.75rem);
}

.blog-hero__panel {
  position: relative;
  max-width: calc(56rem + 2 * var(--gutter));
  margin-inline: auto;
  padding-top: 2.5rem;
  padding-bottom: 2.5rem;
  padding-inline: var(--gutter);
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r);
}

.blog-hero__panel::before {
  content: "";
  position: absolute;
  top: 0.875rem;
  right: 0.875rem;
  width: 30%;
  height: 58%;
  background: color-mix(in srgb, var(--hl) 11%, var(--bg-panel-2));
  border-radius: var(--r);
  transform: rotate(1.6deg);
  z-index: 0;
  pointer-events: none;
}

.blog-hero__panel > * {
  position: relative;
  z-index: 1;
}

.blog-hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.75rem, 4.5vw, 3rem);
  line-height: 1.2;
  letter-spacing: -0.015em;
  text-wrap: pretty;
  color: var(--text);
}

.blog-hero__lead {
  max-width: 42rem;
  margin-top: 0.875rem;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text-muted);
}

/* ---------- 筛选栏 ---------- */

.blog-filter {
  padding-top: 0.25rem;
  padding-bottom: 1.5rem;
}

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

.filter-btn {
  appearance: none;
  border: 1px solid var(--border);
  background: var(--bg-panel);
  color: var(--text-muted);
  border-radius: var(--r-pill);
  padding: 0.5rem 1.125rem;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  line-height: 1.4;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.filter-btn:hover {
  border-color: var(--hl);
  color: var(--text);
}

.filter-btn.is-on {
  background: var(--accent);
  border-color: var(--accent);
  color: #ffffff;
}

/* ---------- 文章卡网格 ---------- */

.blog-list-sec {
  padding-top: 0.25rem;
  padding-bottom: 3rem;
}

.post-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem;
}

.post-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r);
  text-decoration: none;
  overflow: hidden;
  transition: transform 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}

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

.post-card__body {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: 1.25rem 1.5rem 1.5rem;
}

.post-card__meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.post-card .badge {
  background: color-mix(in srgb, var(--hl) 12%, var(--bg-panel));
  border-color: color-mix(in srgb, var(--hl) 32%, var(--border));
  color: var(--accent);
}

.post-card__title {
  margin-top: 0.75rem;
  margin-bottom: 0.5rem;
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 700;
  line-height: 1.45;
  letter-spacing: -0.01em;
  text-wrap: pretty;
  color: var(--text);
}

.post-card__sum {
  margin-top: 0;
  margin-bottom: 1rem;
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--text-muted);
}

.post-card__more {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  margin-top: auto;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--hl);
}

.post-card__more svg {
  transition: transform 0.15s ease;
}

.post-card:hover .post-card__more svg {
  transform: translateX(2px);
}

.post-empty {
  padding: 2.5rem 1rem;
  text-align: center;
  color: var(--text-muted);
  border: 1px dashed var(--border);
  border-radius: var(--r);
}

/* ---------- 文章页面包屑 ---------- */

.crumbs {
  max-width: calc(56rem + 2 * var(--gutter));
  margin-inline: auto;
  padding-top: 1.25rem;
  padding-bottom: 0.75rem;
  padding-inline: var(--gutter);
  font-size: 0.875rem;
}

.crumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.375rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.crumbs a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.15s ease;
}

.crumbs a:hover {
  color: var(--hl);
}

.crumbs li + li::before {
  content: "/";
  margin-right: 0.375rem;
  color: var(--border);
}

.crumbs li[aria-current="page"] {
  color: var(--text);
  font-weight: 600;
}

/* ---------- 文章 Hero(offset-block 错位色块) ---------- */

.article-hero {
  position: relative;
  max-width: calc(56rem + 2 * var(--gutter));
  margin-inline: auto;
  padding-top: 2.5rem;
  padding-bottom: 2.25rem;
  padding-inline: var(--gutter);
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r);
}

.article-hero::before {
  content: "";
  position: absolute;
  top: 0.875rem;
  right: 0.875rem;
  width: 32%;
  height: 56%;
  background: color-mix(in srgb, var(--hl) 11%, var(--bg-panel-2));
  border-radius: var(--r);
  transform: rotate(1.6deg);
  z-index: 0;
  pointer-events: none;
}

.article-hero > * {
  position: relative;
  z-index: 1;
}

.article-hero__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-start;
  gap: 0.5rem 0.75rem;
  margin-bottom: 1.125rem;
}

.article-hero__meta .badge {
  background: color-mix(in srgb, var(--hl) 12%, var(--bg-panel));
  border-color: color-mix(in srgb, var(--hl) 32%, var(--border));
  color: var(--accent);
}

.article-hero__meta time,
.article-hero__meta .read-time {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.article-hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.5rem, 3.5vw, 2.6rem);
  line-height: 1.25;
  letter-spacing: -0.015em;
  text-wrap: pretty;
  color: var(--text);
}

.article-hero__lead {
  margin-top: 1rem;
  font-size: 1.05rem;
  line-height: 1.75;
  color: var(--text-muted);
}

/* ---------- 正文阅读列(与 hero 同宽对齐) ---------- */

.reading-wrap {
  max-width: calc(56rem + 2 * var(--gutter));
  width: auto;
  margin-inline: auto;
  padding-top: 1rem;
  padding-bottom: 0;
  padding-inline: var(--gutter);
}

/* ---------- 文章正文排版 ---------- */

.article-content {
  counter-reset: h2sec;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text);
}

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

.article-content h2 {
  counter-increment: h2sec;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 2.2vw, 1.6rem);
  font-weight: 800;
  line-height: 1.4;
  letter-spacing: -0.01em;
  text-wrap: pretty;
  color: var(--text);
}

.article-content h2::before {
  content: counter(h2sec, decimal-leading-zero) " ";
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--hl);
}

.article-content h3 {
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 1.8vw, 1.3rem);
  font-weight: 700;
  line-height: 1.45;
  letter-spacing: -0.01em;
  text-wrap: pretty;
  color: var(--text);
}

.article-content p {
  margin-top: 0;
  margin-bottom: 1.25rem;
}

.article-content ul,
.article-content ol {
  margin-top: 1.25rem;
  margin-bottom: 1.25rem;
  padding-left: 1.5rem;
}

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

.article-content li > ul,
.article-content li > ol {
  margin-top: 0.5rem;
  margin-bottom: 0.5rem;
}

.article-content strong {
  color: var(--accent);
}

.article-content a {
  color: var(--hl);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

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

.article-content hr {
  margin-top: 2rem;
  margin-bottom: 2rem;
  border: none;
  border-top: 1px solid var(--line);
}

.article-content blockquote {
  margin-top: 1.75rem;
  margin-bottom: 1.75rem;
  padding: 0.5rem 0 0.5rem 1.25rem;
  border-left: 3px solid var(--border);
  color: var(--text-muted);
}

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

/* ---------- 数据卡网格 ---------- */

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(9rem, 1fr));
  gap: 0.875rem;
  margin-top: 1.75rem;
  margin-bottom: 1.75rem;
}

.stat-card {
  position: relative;
  overflow: hidden;
  padding: 1.125rem 1.25rem 1.25rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r);
}

.stat-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 0.1875rem;
  background: var(--hl);
}

.stat-card--alt::before {
  background: var(--success);
}

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

.stat-card--accent::before {
  background: var(--accent);
}

.stat-num {
  display: block;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 800;
  line-height: 1.2;
  color: var(--text);
}

.stat-label {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ---------- 勾叉清单(标记由 li 文本携带,样式不注入符号) ---------- */

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

.check-list li {
  padding: 0.875rem 1.25rem;
  margin-bottom: 0.5rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  line-height: 1.7;
}

.check-list li:last-child {
  margin-bottom: 0;
}

/* ---------- 结论块 ---------- */

.verdict {
  margin-top: 1.75rem;
  margin-bottom: 1.75rem;
  padding: 1.25rem 1.5rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: var(--r-sm);
}

.verdict::before {
  content: "结论";
  display: inline-block;
  margin-bottom: 0.375rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--accent);
}

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

/* ---------- 提示框(callout) ---------- */

.callout {
  position: relative;
  margin-top: 1.75rem;
  margin-bottom: 1.75rem;
  padding: 1rem 1.25rem 1rem 3.25rem;
  background: color-mix(in srgb, var(--hl) 8%, var(--bg-panel));
  border-left: 3px solid var(--hl);
  border-radius: var(--r-sm);
}

.callout::before {
  content: "i";
  position: absolute;
  left: 1.125rem;
  top: 1.125rem;
  width: 1.375rem;
  height: 1.375rem;
  border-radius: 50%;
  background: var(--hl);
  color: #ffffff;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  line-height: 1.375rem;
  text-align: center;
}

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

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

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

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

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

/* ---------- 表格 ---------- */

.table-scroll {
  margin-top: 1.5rem;
  margin-bottom: 1.5rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.article-content table,
.table-scroll table {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  font-size: 0.95rem;
  line-height: 1.5;
}

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

.article-content tbody td,
.table-scroll tbody td {
  padding: 0.75rem 1rem;
  border-top: 1px solid var(--line);
}

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

.article-content tbody tr:hover,
.table-scroll tbody tr:hover {
  background: color-mix(in srgb, var(--hl) 8%, var(--bg-panel));
}

/* ---------- 代码块(终端窗) ---------- */

.article-content pre {
  position: relative;
  margin-top: 1.5rem;
  margin-bottom: 1.5rem;
  padding: 2.25rem 1.5rem 1.25rem;
  background: var(--accent-dark);
  color: #e9ebf8;
  border-radius: var(--r);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  line-height: 1.65;
}

.article-content pre::before {
  content: "";
  position: absolute;
  top: 0.875rem;
  left: 1.25rem;
  width: 0.625rem;
  height: 0.625rem;
  border-radius: 50%;
  background: var(--error);
  box-shadow: 1rem 0 0 var(--warn), 2rem 0 0 var(--success);
}

.article-content pre code {
  padding: 0;
  background: transparent;
  color: inherit;
  font-family: inherit;
  font-size: inherit;
}

/* ---------- 文末推广块 ---------- */

.promo-block {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem 1.5rem;
  margin-top: 2.5rem;
  margin-bottom: 0;
  padding: 1.5rem 1.75rem;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
  border-radius: var(--r);
  overflow: hidden;
}

.promo-block::before {
  content: "";
  position: absolute;
  top: -2.5rem;
  right: -2.5rem;
  width: 9rem;
  height: 9rem;
  border-radius: 50%;
  background: color-mix(in srgb, var(--hl) 30%, transparent);
  pointer-events: none;
}

.promo-block__txt {
  position: relative;
  z-index: 1;
}

.promo-block__txt b {
  display: block;
  margin-bottom: 0.25rem;
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 800;
  color: #ffffff;
}

.promo-block__txt span {
  display: block;
  font-size: 0.9rem;
  line-height: 1.6;
  color: color-mix(in srgb, #ffffff 85%, transparent);
}

.promo-block .btn--light {
  position: relative;
  z-index: 1;
  background: #ffffff;
  border-color: #ffffff;
  color: var(--accent);
  flex-shrink: 0;
}

.promo-block .btn--light:hover {
  background: var(--bg-panel);
  border-color: var(--bg-panel);
}

/* ---------- 延伸阅读 ---------- */

#related-posts {
  margin-top: 2.5rem;
  padding-top: 0;
  padding-bottom: 0;
}

.related__title {
  margin-top: 0;
  margin-bottom: 1rem;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  text-wrap: pretty;
  color: var(--text);
}

.related__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.related-card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.125rem 1.25rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-top: 3px solid transparent;
  border-radius: var(--r);
  text-decoration: none;
  transition: transform 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}

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

.related-card__meta {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
}

.related-card__title {
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.5;
  color: var(--text);
}

.related-card__more {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  margin-top: auto;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--hl);
}

/* ---------- 上一篇 / 下一篇 ---------- */

#post-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 2rem;
  padding-top: 0;
  padding-bottom: 0.5rem;
}

.post-nav__item {
  display: block;
  padding: 1.125rem 1.25rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r);
  text-decoration: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

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

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

.post-nav__dir {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
}

.post-nav__title {
  display: block;
  margin-top: 0.375rem;
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.5;
  color: var(--text);
}

/* ---------- 响应式 ---------- */

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

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

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

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

  .post-nav__item--next {
    text-align: left;
  }

  .blog-hero__panel::before,
  .article-hero::before {
    width: 42%;
  }
}

@media (max-width: 640px) {
  .blog-hero__panel {
    padding-top: 1.75rem;
    padding-bottom: 1.75rem;
    padding-inline: 1.5rem;
  }

  .blog-hero__title {
    font-size: 1.75rem;
  }

  .article-hero {
    padding-top: 1.75rem;
    padding-bottom: 1.75rem;
    padding-inline: 1.5rem;
  }

  .article-hero__title {
    font-size: 1.5rem;
  }

  .promo-block {
    flex-direction: column;
    align-items: flex-start;
  }

  .promo-block .btn--light {
    width: 100%;
    justify-content: center;
  }
}

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

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