/* ===== 博客列表页 Hero ===== */
.blog-intro {
  padding-top: 3.2rem;
  padding-bottom: 1.6rem;
}

.blog-h1 {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 4.4vw, 3.4rem);
  line-height: 1.15;
  color: var(--ink);
  margin: 0.5rem 0 0.8rem;
}

.blog-lead {
  font-family: var(--font-body);
  color: var(--ink-2);
  font-size: 1.02rem;
  max-width: 640px;
  margin: 0;
}

/* ===== 标签筛选 ===== */
.tag-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin: 1.4rem 0 2rem;
}

.tag-btn {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.02em;
  padding: 0.42rem 0.9rem;
  background: var(--card);
  border: 1px solid var(--oak);
  color: var(--ink);
  cursor: pointer;
  border-radius: 0;
}

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

.tag-btn.is-active {
  background: var(--stamp);
  border-color: var(--stamp-deep);
  color: var(--card);
}

/* ===== 文章卡片网格 ===== */
.post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.4rem;
}

.post-card {
  display: block;
  text-decoration: none;
  color: var(--ink);
  padding: 1.3rem 1.3rem 1.5rem;
  position: relative;
}

.post-card .icard-head {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-2);
  margin: 0 0 0.7rem;
}

.post-card .icard-head b {
  color: var(--stamp);
}

.post-date {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-2);
  margin-right: 0.6rem;
}

.tag-chip {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.03em;
  padding: 0.14rem 0.5rem;
  border: 1px solid var(--thread);
  color: var(--ink-2);
  background: var(--paper-2);
}

.post-title {
  font-family: var(--font-display);
  font-size: 1.18rem;
  line-height: 1.4;
  margin: 0.8rem 0 0.6rem;
  color: var(--ink);
}

.post-sum {
  font-family: var(--font-body);
  font-size: 0.92rem;
  line-height: 1.65;
  color: var(--ink-2);
  margin: 0;
}

/* ===== 面包屑(文章页) ===== */
.crumbs {
  margin-top: 1.4rem;
  padding-top: 1.4rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--ink-2);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.crumbs a {
  color: var(--ink-2);
  text-decoration: none;
  border-bottom: 1px dotted var(--thread);
}

.crumbs a:hover {
  color: var(--stamp);
  border-bottom-color: var(--stamp);
}

.crumb-sep {
  color: var(--thread);
}

.crumb-here {
  color: var(--ink);
}

/* ===== 文章正文 ===== */
.prose {
  padding-top: 1.4rem;
  padding-bottom: 2.4rem;
  max-width: 760px;
  font-family: var(--font-body);
  color: var(--ink);
  line-height: 1.85;
}

.prose h1 {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 3.6vw, 2.6rem);
  line-height: 1.25;
  margin: 0 0 0.6rem;
}

.prose h2 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  margin: 2.2rem 0 0.9rem;
  padding-top: 1.4rem;
  border-top: 1px solid var(--thread);
}

.prose h2 .sec-no {
  font-family: var(--font-mono);
  color: var(--stamp);
  font-size: 0.85rem;
  display: inline-block;
  margin-right: 0.6rem;
  vertical-align: middle;
}

.prose h3 {
  font-family: var(--font-display);
  font-size: 1.18rem;
  margin: 1.6rem 0 0.6rem;
}

.prose p {
  margin: 0 0 1rem;
}

.prose ul,
.prose ol {
  margin: 0 0 1.2rem;
  padding-left: 1.4rem;
}

.prose li {
  margin-bottom: 0.5rem;
}

.step-list {
  counter-reset: step;
  padding-left: 0;
}

.step-list li {
  list-style: none;
  position: relative;
  padding-left: 2.2rem;
  margin-bottom: 1rem;
}

.step-list li::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 1.5rem;
  height: 1.5rem;
  border: 1px solid var(--oak);
  color: var(--stamp);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--card);
}

.callout {
  border: 1px solid var(--oak);
  border-left: 3px solid var(--stamp);
  background: var(--paper-2);
  padding: 1rem 1.2rem;
  margin: 1.4rem 0;
}

.callout-title {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--stamp);
  margin-bottom: 0.4rem;
}

.callout-tip {
  border-left-color: var(--ok);
}

.callout-warn {
  border-left-color: var(--warn);
}

.callout-danger {
  border-left-color: var(--bad);
}

.table-wrap {
  overflow-x: auto;
  margin: 1.4rem 0;
  border: 1px solid var(--thread);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.data-table th,
.data-table td {
  border-bottom: 1px solid var(--thread);
  padding: 0.6rem 0.8rem;
  text-align: left;
}

.data-table th {
  background: var(--paper-deep);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--ink-2);
}

.prose pre {
  background: var(--paper-deep);
  border: 1px solid var(--oak);
  padding: 1rem 1.2rem;
  overflow-x: auto;
  margin: 1.4rem 0;
}

.prose code {
  font-family: var(--font-mono);
  font-size: 0.88rem;
}

.prose blockquote {
  border-left: 3px solid var(--thread);
  margin: 1.4rem 0;
  padding-left: 1.2rem;
  color: var(--ink-2);
}

/* ===== 文末下载引导卡 ===== */
.endcap {
  padding: 1.8rem 1.8rem 2rem;
  margin: 2.4rem 0;
}

.endcap-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  margin: 0 0 0.6rem;
}

.endcap-desc {
  color: var(--ink-2);
  margin: 0 0 1.2rem;
}

/* ===== 延伸阅读 ===== */
#related-posts {
  margin: 2.6rem 0;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1.2rem;
  margin-top: 1rem;
}

.related-card {
  display: block;
  text-decoration: none;
  color: var(--ink);
  padding: 1.1rem 1.1rem 1.3rem;
}

.related-title {
  font-family: var(--font-display);
  font-size: 1.02rem;
  line-height: 1.4;
  margin: 0.7rem 0 0.5rem;
}

.related-sum {
  font-family: var(--font-body);
  font-size: 0.86rem;
  line-height: 1.6;
  color: var(--ink-2);
  margin: 0;
}

/* ===== 上一篇/下一篇 ===== */
#post-nav {
  margin: 2rem 0 2.8rem;
}

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

.post-nav-item {
  border: 1px solid var(--oak);
  background: var(--card);
  padding: 1rem 1.2rem;
  text-decoration: none;
  color: var(--ink);
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

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

.post-nav-dir {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--stamp);
  letter-spacing: 0.05em;
}

.post-nav-title {
  font-family: var(--font-body);
  font-size: 0.92rem;
  line-height: 1.5;
}

.post-nav-empty {
  visibility: hidden;
}

@media (max-width: 640px) {
  .post-nav-row {
    grid-template-columns: 1fr;
  }

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