/* ============ 列表页 Hero ============ */
.blog-hero {
  border-bottom: 1px solid var(--rule);
}

.blog-h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
  letter-spacing: 0.01em;
  color: var(--chalk);
  margin: 0.6rem 0 0.8rem;
}

.blog-lead {
  color: var(--chalk-dim);
  line-height: 1.75;
  max-width: 640px;
}

/* ============ 筛选行 ============ */
.filter-sec {
  padding-top: 0;
}

.filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.filter-btn {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  padding: 8px 18px;
  background: transparent;
  border: 1px solid var(--rule);
  color: var(--chalk-dim);
  cursor: pointer;
  border-radius: 0;
  position: relative;
  transition: border-color 0.15s ease, color 0.15s ease;
}

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

.filter-btn.on {
  border-color: var(--seal);
  color: var(--chalk);
}

.filter-btn.on::before {
  content: "";
  position: absolute;
  left: -1px;
  top: -1px;
  bottom: -1px;
  width: 3px;
  background: var(--seal);
}

/* ============ 文章卡片网格 ============ */
.post-list-sec {
  padding-top: 8px;
}

.post-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}

.post-card {
  background: var(--paper-raise);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
}

.post-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--chalk-dim);
}

.post-date {
  letter-spacing: 0.03em;
}

.post-tag {
  border: 1px solid var(--rule);
  padding: 2px 8px;
  color: var(--chalk-dim);
}

.post-title {
  margin: 0;
  font-size: 1.15rem;
  line-height: 1.5;
}

.post-title a {
  color: var(--chalk);
  text-decoration: none;
}

.post-title a:hover {
  text-decoration: underline;
}

.post-summary {
  color: var(--chalk-dim);
  font-size: 0.92rem;
  line-height: 1.7;
  margin: 0;
  flex: 1;
}

.post-more {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--seal);
  text-decoration: none;
  align-self: flex-start;
}

.post-more:hover {
  text-decoration: underline;
}

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

/* ============ 面包屑(文章页) ============ */
.crumbs {
  margin-top: 28px;
  padding-top: 0;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--chalk-dim);
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.crumbs a {
  color: var(--chalk-dim);
  text-decoration: none;
}

.crumbs a:hover {
  color: var(--chalk);
  text-decoration: underline;
}

.crumbs .sep {
  color: var(--rule);
}

.crumbs .cur {
  color: var(--chalk);
}

/* ============ 文章 Hero ============ */
.article-hero {
  border-bottom: 1px solid var(--rule);
  padding-top: 20px;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--chalk-dim);
  margin-bottom: 14px;
  flex-wrap: wrap;
}

.article-meta .post-tag {
  border: 1px solid var(--rule);
  padding: 2px 8px;
}

.article-h1 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.7rem);
  font-weight: 800;
  line-height: 1.32;
  color: var(--chalk);
  margin: 0 0 16px;
  max-width: 900px;
}

.article-lead {
  color: var(--chalk-dim);
  font-size: 1.02rem;
  line-height: 1.8;
  max-width: 720px;
}

/* ============ 正文排版 .prose ============ */
.prose {
  max-width: 760px;
  color: var(--chalk);
  line-height: 1.85;
  font-size: 1rem;
}

.prose h2 {
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 800;
  margin: 2.4em 0 0.9em;
  display: flex;
  align-items: baseline;
  gap: 12px;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 10px;
}

.prose h2 .no {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--seal);
  border: 1px solid var(--seal);
  padding: 2px 8px;
  flex-shrink: 0;
}

.prose h3 {
  font-family: var(--font-display);
  font-size: 1.12rem;
  font-weight: 700;
  margin: 1.8em 0 0.7em;
  color: var(--chalk);
}

.prose p {
  margin: 0 0 1.2em;
  color: var(--chalk-dim);
}

.prose strong {
  color: var(--chalk);
}

.prose ul,
.prose ol {
  margin: 0 0 1.4em;
  padding-left: 1.4em;
  color: var(--chalk-dim);
}

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

.prose code {
  font-family: var(--font-mono);
  background: var(--paper-sink);
  border: 1px solid var(--rule);
  padding: 1px 6px;
  font-size: 0.88em;
  color: var(--chalk);
  overflow-wrap: anywhere;
}

/* 长标识符/相邻 code 之间无断行点时,禁止其撑破移动端 */
.prose p,
.prose li {
  overflow-wrap: anywhere;
}

.prose pre {
  background: var(--paper-sink);
  border: 1px solid var(--rule);
  padding: 16px 18px;
  overflow-x: auto;
  margin: 0 0 1.6em;
}

.prose pre code {
  border: none;
  background: none;
  padding: 0;
  font-size: 0.86rem;
  line-height: 1.6;
}

.prose blockquote {
  margin: 0 0 1.6em;
  padding: 4px 0 4px 18px;
  border-left: 3px solid var(--seal);
  color: var(--chalk-dim);
}

.prose > .data-table {
  display: block;
  overflow-x: auto;
}

/* ============ 步骤列表 .steps ============ */
.steps {
  list-style: none;
  margin: 0 0 1.6em;
  padding: 0;
  counter-reset: step-counter;
}

.steps li {
  position: relative;
  padding: 12px 16px 12px 52px;
  margin-bottom: 1px;
  border: 1px solid var(--rule);
  background: var(--paper-raise);
  counter-increment: step-counter;
}

.steps li::before {
  content: counter(step-counter, decimal-leading-zero);
  position: absolute;
  left: 14px;
  top: 12px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--seal);
  border: 1px solid var(--seal);
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ============ 引用块 .callout ============ */
.callout {
  border: 1px solid var(--rule);
  background: var(--paper-raise);
  padding: 16px 18px;
  margin: 0 0 1.6em;
}

.callout-t {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--chalk-dim);
  margin-bottom: 8px;
}

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

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

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

/* ============ 文末下载引导卡 ============ */
.dl-guide {
  max-width: 760px;
  margin: 3rem 0 2.4rem;
  padding: 28px;
  border: 1px solid var(--rule);
  background: var(--paper-raise);
  position: relative;
}

.dl-guide::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  width: 18px;
  height: 18px;
  border-top: 2px solid var(--seal);
  border-left: 2px solid var(--seal);
}

.dl-guide::after {
  content: "";
  position: absolute;
  bottom: -1px;
  right: -1px;
  width: 18px;
  height: 18px;
  border-bottom: 2px solid var(--seal);
  border-right: 2px solid var(--seal);
}

.dl-guide-t {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--chalk);
  margin: 0 0 10px;
}

.dl-guide-d {
  color: var(--chalk-dim);
  margin: 0 0 18px;
  line-height: 1.7;
}

.dl-guide-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

/* ============ 延伸阅读 ============ */
#related-posts {
  max-width: 900px;
  margin: 0 0 2.4rem;
}

.related-t {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--chalk);
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 0 0 1.2rem;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 10px;
}

.related-t .no {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--seal);
  border: 1px solid var(--seal);
  padding: 2px 8px;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}

.related-grid .post-card {
  padding: 20px;
}

@media (max-width: 900px) {
  .related-grid {
    grid-template-columns: 1fr;
  }
}

/* ============ 上下篇导航 ============ */
.post-nav {
  max-width: 900px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
  margin: 0 0 3rem;
}

.post-nav-link {
  background: var(--paper-raise);
  padding: 20px 22px;
  text-decoration: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
}

.post-nav-link:hover {
  background: var(--paper-sink);
}

.post-nav-dir {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--seal);
  letter-spacing: 0.05em;
}

.post-nav-title {
  color: var(--chalk);
  font-size: 0.95rem;
  line-height: 1.5;
}

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

.post-nav-next .post-nav-dir {
  align-self: flex-end;
}

@media (max-width: 640px) {
  .post-nav {
    grid-template-columns: 1fr;
  }
  .post-nav-next {
    text-align: left;
  }
  .post-nav-next .post-nav-dir {
    align-self: flex-start;
  }
}

/* ============ 右下角常驻下载浮层(文章页专属) ============ */
.dl-fab {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 40;
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--seal);
  color: var(--chalk);
  border: 1px solid var(--chalk);
  padding: 12px 18px;
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none;
}

.dl-fab:hover {
  background: var(--seal-deep);
}

.dl-fab svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

@media (max-width: 560px) {
  .dl-fab {
    right: 14px;
    bottom: 14px;
    padding: 10px 14px;
    font-size: 0.82rem;
  }
}