/* ==========================================================================
   VPNSJ · 博客样式包
   列表页与文章页共用;颜色、字体、圆角全部引用 base.css 的设计令牌。
   ========================================================================== */

/* 1. 阅读列
   正文列 56rem;盒宽 = 阅读列 + 2×gutter,内衬与 hero 同值。
   hero 内层清零 padding,由 hero 自身提供 ≥1.5rem 的 padding-inline,
   保证色带内容不贴边、且与正文左缘对齐。 */
.reading-wrap {
  width: 100%;
  max-width: calc(56rem + 2 * max(1.5rem, var(--gutter)));
  margin-inline: auto;
  padding-inline: max(1.5rem, var(--gutter));
}

/* 2. 面包屑 */
.breadcrumb {
  margin-top: 1.5rem;
  margin-bottom: 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumb li {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.breadcrumb li + li::before {
  content: "/";
  color: var(--text-soft);
}

.breadcrumb a {
  color: var(--text-muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease;
}

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

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

/* 3. 通栏色带 hero
   色带作为 main 的直接子元素横向铺满;不使用负 margin,
   避免滚动条宽度把正文列推偏。 */
.blog-hero,
.article-hero {
  position: relative;
  isolation: isolate;
  width: 100%;
  padding-inline: max(1.5rem, var(--gutter));
  border-block: 1px solid var(--border);
  background: linear-gradient(180deg, var(--bg-panel) 0%, var(--bg-panel-2) 100%);
  overflow: hidden;
}

.blog-hero::before,
.article-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image: radial-gradient(color-mix(in srgb, var(--accent) 12%, transparent) 1px, transparent 1px);
  background-size: 18px 18px;
  opacity: 0.55;
  pointer-events: none;
}

.blog-hero .reading-wrap,
.article-hero .reading-wrap {
  position: relative;
  z-index: 1;
  max-width: 56rem;
  padding-inline: 0;
}

.blog-hero {
  padding-block: clamp(2.5rem, 6vw, 4.25rem) clamp(2.25rem, 5vw, 3.5rem);
}

.article-hero {
  padding-block: clamp(2rem, 5vw, 3.25rem) clamp(1.75rem, 4vw, 2.75rem);
}

.blog-hero-kicker {
  margin: 0 0 0.7rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--accent);
}

.blog-hero-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4.6vw, 3rem);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -0.015em;
  color: var(--text);
  text-wrap: pretty;
}

.blog-hero-lede {
  max-width: 40rem;
  margin: 1rem 0 0;
  font-size: 1.02rem;
  line-height: 1.75;
  color: var(--text-muted);
}

/* 4. 文章 hero 的日期 / 标签 / 时长
   无框小字 + 中点分隔,不做胶囊。 */
.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem 0.7rem;
  margin: 0 0 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.5;
  color: var(--text-muted);
}

.article-meta .sep {
  color: var(--text-soft);
}

.article-meta a {
  color: var(--accent);
  text-decoration: none;
}

.article-meta a:hover {
  text-decoration: underline;
  text-underline-offset: 0.18em;
}

.article-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.6rem);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -0.015em;
  color: var(--text);
  text-wrap: pretty;
}

.article-summary {
  max-width: 44rem;
  margin: 1rem 0 0;
  font-size: 1.02rem;
  line-height: 1.75;
  color: var(--text-muted);
}

/* 5. 列表页标题行与筛选 */
.list-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--sp-2) var(--sp-4);
  margin-bottom: var(--sp-4);
}

.list-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 2.4vw, 1.45rem);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--text);
  text-wrap: pretty;
}

.list-status {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  color: var(--text-soft);
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  margin-bottom: var(--sp-5);
}

.filter-btn {
  appearance: none;
  border: 1px solid var(--border);
  border-radius: var(--pill);
  background: var(--bg-panel);
  color: var(--text-muted);
  font-family: var(--font-body);
  font-size: 0.86rem;
  line-height: 1.2;
  padding: 0.48rem 0.95rem;
  cursor: pointer;
  transition: color 0.18s ease, border-color 0.18s ease, background-color 0.18s ease, transform 0.18s ease;
}

.filter-btn:hover {
  color: var(--text);
  border-color: var(--border-strong);
  transform: translateY(-1px);
}

.filter-btn[aria-pressed="true"] {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--on-accent);
  box-shadow: var(--shadow-chip);
}

.filter-btn:focus-visible {
  outline: 2px solid var(--accent-rose);
  outline-offset: 2px;
}

/* 6. 文章卡片 */
.post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 20rem), 1fr));
  gap: var(--sp-5);
}

.post-grid .post-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  margin: 0;
  padding: var(--sp-5);
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.post-grid .post-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-rose));
  opacity: 0;
  transition: opacity 0.2s ease;
}

.post-grid .post-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-soft);
}

.post-grid .post-card:hover::before {
  opacity: 1;
}

.post-grid .post-meta,
.related-card .post-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem 0.6rem;
  margin: 0;
  font-size: 0.78rem;
  line-height: 1.4;
  color: var(--text-muted);
}

.post-grid .post-meta .sep,
.related-card .post-meta .sep {
  display: inline-block;
  width: 3px;
  height: 3px;
  border-radius: var(--pill);
  background: var(--border-strong);
}

.post-grid .tag-chip,
.related-card .tag-chip {
  font-size: 0.72rem;
}

.post-grid .post-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.12rem;
  font-weight: 700;
  line-height: 1.45;
  letter-spacing: -0.005em;
  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;
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--text-muted);
}

.post-grid .post-more {
  margin-top: auto;
  padding-top: var(--sp-1);
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
}

.post-grid .post-more:hover {
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.list-empty {
  grid-column: 1 / -1;
  margin: 0;
  padding: var(--sp-4) var(--sp-5);
  background: var(--bg-panel);
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-md);
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.7;
}

.blog-promo {
  margin-top: clamp(2rem, 5vw, 3rem);
}

/* 7. 文章正文排版
   正文字号 1rem、行高 1.8;H2 ≤1.6rem、H3 ≤1.3rem。 */
.article-body {
  max-width: none;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text);
  counter-reset: section;
}

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

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

.article-body h2 {
  counter-increment: section;
  margin: 2.2em 0 0.7em;
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 2.4vw, 1.6rem);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--text);
  text-wrap: pretty;
  scroll-margin-top: calc(var(--header-h) + 1rem);
}

.article-body h2::before {
  content: counter(section, decimal-leading-zero);
  display: inline-block;
  margin-right: 0.55em;
  font-family: var(--font-mono);
  font-size: 0.72em;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--accent);
}

.article-body h3 {
  margin: 1.7em 0 0.55em;
  font-family: var(--font-display);
  font-size: clamp(1.08rem, 1.8vw, 1.3rem);
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: -0.005em;
  color: var(--text);
  text-wrap: pretty;
}

.article-body h4 {
  margin: 1.4em 0 0.4em;
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--text);
}

.article-body a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

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

.article-body ul,
.article-body ol {
  margin: 0 0 1.2em;
  padding-left: 1.4em;
}

.article-body li {
  margin: 0.35em 0;
}

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

.article-body blockquote {
  margin: 1.6em 0;
  padding: 1rem 1.15rem;
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  background: color-mix(in srgb, var(--accent) 6%, var(--bg-panel));
  color: var(--text-muted);
}

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

.article-body code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--bg-panel-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-xs);
  padding: 0.12em 0.35em;
  color: var(--accent-dark);
}

.article-body pre {
  position: relative;
  margin: 1.6em 0;
  padding: 2.3rem 1.15rem 1.15rem;
  overflow-x: auto;
  background: var(--bg-deep);
  color: var(--bg-panel);
  border: 1px solid var(--bg-deep-2);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  line-height: 1.65;
}

.article-body pre::before {
  content: "● ● ●";
  position: absolute;
  top: 0.7rem;
  left: 1rem;
  font-size: 0.62rem;
  letter-spacing: 0.32em;
  color: var(--accent-rose);
  opacity: 0.9;
}

.article-body pre code {
  display: block;
  padding: 0;
  border: 0;
  background: transparent;
  color: inherit;
  font-size: 0.86rem;
  white-space: pre;
}

/* 8. 正文表格:深色表头 + 斑马纹 + hover,窄屏可横滑 */
.article-body .table-scroll {
  margin: 1.6em 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.article-body .table-scroll table {
  margin: 0;
  min-width: 34rem;
}

.article-body table {
  width: 100%;
  margin: 1.6em 0;
  border-collapse: collapse;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  font-size: 0.94rem;
}

.article-body thead th {
  background: var(--bg-deep);
  color: var(--bg-panel);
  font-weight: 600;
  text-align: left;
}

.article-body th,
.article-body td {
  padding: 0.65rem 0.8rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

.article-body tbody tr:nth-child(even) {
  background: color-mix(in srgb, var(--bg-panel-2) 55%, var(--bg-panel));
}

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

.article-body caption {
  caption-side: bottom;
  padding-top: 0.5rem;
  font-size: 0.8rem;
  color: var(--text-soft);
  text-align: left;
}

/* 9. callout:左色条 + 图标徽 */
.article-body .callout {
  position: relative;
  margin: 1.6em 0;
  padding: 1rem 1.1rem 1rem 1.25rem;
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  background: color-mix(in srgb, var(--accent) 5%, var(--bg-panel));
}

.article-body .callout--warn {
  border-left-color: var(--warn);
  background: var(--warn-tint);
}

.article-body .callout--success {
  border-left-color: var(--success);
  background: var(--success-tint);
}

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

.article-body .callout svg {
  color: var(--accent);
  flex: none;
}

.article-body .callout:not(:has(svg)) {
  padding-left: 3rem;
}

.article-body .callout:not(:has(svg))::before {
  content: "i";
  position: absolute;
  top: 1rem;
  left: 0.85rem;
  display: grid;
  place-items: center;
  width: 1.35rem;
  height: 1.35rem;
  border-radius: var(--pill);
  background: var(--accent);
  color: var(--on-accent);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
}

.article-body .callout--warn:not(:has(svg))::before {
  content: "!";
  background: var(--warn);
}

.article-body .callout--success:not(:has(svg))::before {
  content: "✓";
  background: var(--success);
}

/* 10. 数据卡网格 */
.article-body .stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 12rem), 1fr));
  gap: var(--sp-4);
  margin: 1.6em 0;
}

.article-body .stat-card {
  position: relative;
  overflow: hidden;
  padding: var(--sp-4);
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

.article-body .stat-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 4px;
  background: var(--accent);
}

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

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

.article-body .stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.55rem;
  font-weight: 700;
  line-height: 1.2;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

.article-body .stat-label {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.82rem;
  line-height: 1.5;
  color: var(--text-muted);
}

/* 11. 勾叉清单:只做行卡装饰,勾叉符号由 li 文本自带 */
.article-body .check-list {
  list-style: none;
  display: grid;
  gap: 0.5rem;
  margin: 1.6em 0;
  padding: 0;
}

.article-body .check-list li {
  margin: 0;
  padding: 0.7rem 0.9rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  line-height: 1.7;
}

.article-body .check-list li::marker {
  content: none;
}

/* 12. 结论块 */
.article-body .verdict {
  margin: 1.8em 0;
  padding: 1rem 1.1rem;
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  background: color-mix(in srgb, var(--accent) 7%, var(--bg-panel));
  color: var(--text);
}

.article-body .verdict > :last-child {
  margin-bottom: 0;
}

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

/* 13. 文末推广卡 */
.post-promo {
  position: relative;
  overflow: hidden;
  margin: clamp(2rem, 5vw, 3rem) 0 0;
  padding: clamp(1.5rem, 4vw, 2.25rem);
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, var(--accent-dark) 0%, var(--accent) 55%, var(--accent-rose) 100%);
  color: var(--on-accent);
  box-shadow: var(--shadow-featured);
}

.post-promo::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(color-mix(in srgb, var(--on-accent) 18%, transparent) 1px, transparent 1px);
  background-size: 16px 16px;
  opacity: 0.35;
  pointer-events: none;
}

.post-promo > * {
  position: relative;
  z-index: 1;
}

.post-promo-name {
  margin: 0 0 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  color: color-mix(in srgb, var(--on-accent) 78%, transparent);
}

.post-promo-title {
  margin: 0 0 0.55rem;
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 2.4vw, 1.6rem);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--on-accent);
  text-wrap: pretty;
}

.post-promo-line {
  max-width: 42rem;
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.75;
  color: color-mix(in srgb, var(--on-accent) 88%, transparent);
}

.post-promo-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  margin-top: var(--sp-4);
}

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

.post-promo .btn-primary:hover {
  background: var(--bg-panel-2);
  border-color: var(--bg-panel-2);
}

.post-promo .btn-ghost {
  background: transparent;
  border-color: color-mix(in srgb, var(--on-accent) 55%, transparent);
  color: var(--on-accent);
}

.post-promo .btn-ghost:hover {
  background: color-mix(in srgb, var(--on-accent) 12%, transparent);
  border-color: var(--on-accent);
}

/* 14. 延伸阅读 */
.related {
  margin-top: clamp(2rem, 5vw, 3rem);
  padding-block: 2.25rem 1rem;
  border-top: 1px solid var(--border);
}

.related-title {
  margin: 0 0 var(--sp-4);
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 2vw, 1.45rem);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--text);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr));
  gap: var(--sp-4);
}

.related-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  padding: var(--sp-4);
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.related-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-rose));
  opacity: 0;
  transition: opacity 0.2s ease;
}

.related-card:hover {
  transform: translateY(-3px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-soft);
}

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

.related-card-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: 0;
  color: var(--text);
  text-wrap: pretty;
}

.related-card-title a {
  color: inherit;
  text-decoration: none;
}

.related-card-title a:hover {
  color: var(--accent);
}

.related-card-summary {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.65;
  color: var(--text-muted);
}

/* 15. 上一篇 / 下一篇 */
.post-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-4);
  margin-top: var(--sp-4);
  padding-block: var(--sp-4) 0;
}

.post-nav-link {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: var(--sp-4);
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

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

.post-nav-next {
  grid-column: 2;
  text-align: right;
}

.post-nav-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--text-soft);
  white-space: nowrap;
}

.post-nav-title {
  font-size: 0.98rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--text);
}

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

/* 16. 窄屏 */
@media (max-width: 860px) {
  .article-body table {
    display: block;
    width: fit-content;
    max-width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
}

@media (max-width: 720px) {
  .post-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .blog-hero {
    padding-block: 2rem 1.75rem;
  }

  .blog-hero-title {
    font-size: clamp(1.75rem, 8vw, 2.25rem);
  }

  .article-title {
    font-size: clamp(1.6rem, 7vw, 2rem);
  }

  .article-body h2 {
    margin-top: 1.8em;
  }

  .article-body .stat-grid {
    grid-template-columns: 1fr;
  }

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

  .post-nav-next {
    grid-column: 1;
    text-align: left;
  }
}

/* 17. 减弱动效 */
@media (prefers-reduced-motion: reduce) {
  .filter-btn,
  .post-grid .post-card,
  .post-grid .post-card::before,
  .related-card,
  .related-card::before,
  .post-nav-link {
    transition: none;
  }

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