/* ===========================================================================
   Blog —— 复用 tokens.css，与主站同一套纸/墨语言
   =========================================================================== */

*, *::before, *::after { box-sizing: border-box; }

body.blog {
  margin: 0;
  background: var(--paper-100);
  color: var(--ink-900);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; }
img { max-width: 100%; height: auto; display: block; }

.bl-wrap {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 28px;
}
.bl-wrap--narrow { max-width: 760px; }

.mono {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

/* --------------------------------------------------------------- 顶栏 */
.bl-bar {
  border-bottom: 1px solid var(--line);
  background: var(--paper-100);
  position: sticky;
  top: 0;
  z-index: 30;
  backdrop-filter: saturate(150%) blur(6px);
  background: rgba(244, 241, 232, 0.92);
}
.bl-bar__in {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  height: 62px;
}
.bl-brand {
  display: flex;
  align-items: center;
  gap: 11px;
  text-decoration: none;
  min-width: 0;
}
.bl-brand__logo {
  height: 26px;
  width: auto;
  display: block;
  flex: none;
}
.bl-brand__mark {
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
  background: var(--ink-900);
  color: var(--paper-100);
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  border-radius: 2px;
  flex: none;
}
.bl-brand__name {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
  white-space: nowrap;
}
.bl-brand__sub {
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-400);
  white-space: nowrap;
}
.bl-nav {
  display: flex;
  align-items: center;
  gap: 20px;
  flex: none;
}
.bl-nav a {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-600);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.15s;
}
.bl-nav a:hover, .bl-nav a.on { color: var(--ink-900); }
.bl-nav a.on { border-bottom: 1px solid var(--vermilion-500); }

/* --------------------------------------------------------------- 页头 */
.bl-head {
  padding: clamp(44px, 6vw, 84px) 0 clamp(26px, 3.5vw, 40px);
}
.bl-head__kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--vermilion-500);
  margin-bottom: 16px;
}
.bl-head__kicker::after {
  content: "";
  width: 40px;
  height: 1px;
  background: currentColor;
  opacity: 0.4;
}
.bl-head h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.4vw, 3.25rem);
  line-height: 1.04;
  letter-spacing: -0.035em;
  font-weight: 600;
  margin: 0 0 16px;
  max-width: 20ch;
  text-wrap: balance;
}
.bl-head p {
  color: var(--ink-600);
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.65;
  max-width: 58ch;
  margin: 0;
}

/* --------------------------------------------------------------- 标签筛选 */
.bl-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 18px 0 26px;
  border-top: 1px solid var(--line);
  margin-top: 8px;
}
.bl-tags a {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 11px;
  border: 1px solid var(--line);
  border-radius: 2px;
  text-decoration: none;
  /* 标签里有中文，用正文字体，等宽体在 10px 下中文会糊 */
  font-family: var(--font-body);
  font-size: 12px;
  letter-spacing: 0;
  color: var(--ink-600);
  transition: border-color 0.15s, color 0.15s, background 0.15s;
}
.bl-tags a:hover { border-color: var(--ink-900); color: var(--ink-900); }
.bl-tags a.on {
  background: var(--ink-900);
  border-color: var(--ink-900);
  color: var(--paper-100);
}
.bl-tags a i {
  font-family: var(--font-mono);
  font-style: normal;
  opacity: 0.45;
  font-size: 9.5px;
  line-height: 1;
}

/* --------------------------------------------------------------- 文章网格 */
.bl-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0 40px;
  border-top: 1px solid var(--line-strong);
}

.post-card {
  display: block;
  padding: 26px 0 30px;
  border-bottom: 1px solid var(--line);
  position: relative;
  transition: background 0.2s;
}

/* 标题里的链接用伪元素铺满整卡：整块可点，同时不嵌套 a */
.post-card__title a {
  text-decoration: none;
  color: inherit;
}
.post-card__title a::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
}
.post-card::before {
  content: "";
  position: absolute;
  left: -14px;
  right: -14px;
  top: 0;
  bottom: 0;
  background: rgba(20, 23, 15, 0.022);
  opacity: 0;
  transition: opacity 0.2s;
  pointer-events: none;
}
.post-card:hover::before { opacity: 1; }

.post-card__meta {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--ink-400);
  margin-bottom: 12px;
}
.post-card__meta i { font-style: normal; opacity: 0.45; }

.post-card h2 {
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 1.9vw, 1.6rem);
  line-height: 1.16;
  letter-spacing: -0.025em;
  font-weight: 600;
  margin: 0 0 10px;
  text-wrap: balance;
}
.post-card:hover .post-card__title { color: var(--vermilion-600); }

.post-card p {
  margin: 0;
  color: var(--ink-600);
  font-size: 14.5px;
  line-height: 1.62;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-card__foot {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 14px;
  position: relative;
  z-index: 2;   /* 高于标题伪元素，标签仍可单独点 */
}
.post-tag {
  font-family: var(--font-body);
  font-size: 11px;
  letter-spacing: 0;
  color: var(--ink-400);
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: 3px 8px;
  text-decoration: none;
  line-height: 1.4;
}
a.post-tag:hover { color: var(--ink-900); border-color: var(--ink-400); }

/* 头条：占满两列，标题更大，左侧一条朱线 */
.post-card--lead {
  grid-column: 1 / -1;
  padding: 34px 0 38px;
}
.post-card--lead h2 {
  font-size: clamp(1.75rem, 3.4vw, 2.6rem);
  line-height: 1.08;
  max-width: 24ch;
}
.post-card--lead p {
  font-size: 16px;
  max-width: 62ch;
  -webkit-line-clamp: 2;
}

/* --------------------------------------------------------------- 空态 */
.bl-empty {
  padding: 90px 0;
  text-align: center;
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line);
}
.bl-empty b {
  display: block;
  font-family: var(--font-display);
  font-size: 22px;
  margin-bottom: 8px;
  font-weight: 600;
}
.bl-empty p { color: var(--ink-400); margin: 0 0 20px; }

/* --------------------------------------------------------------- 分页 */
.bl-pager {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 30px 0 70px;
  flex-wrap: wrap;
}
.bl-pager__links { display: flex; gap: 4px; }
.bl-pager__links a,
.bl-pager__links span {
  min-width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  padding: 0 9px;
  border: 1px solid var(--line);
  border-radius: 2px;
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-600);
}
.bl-pager__links a:hover { border-color: var(--ink-900); color: var(--ink-900); }
.bl-pager__links .on {
  background: var(--ink-900);
  border-color: var(--ink-900);
  color: var(--paper-100);
}
.bl-pager__count { color: var(--ink-400); }

/* =============================================================== 文章页 */
.bl-crumb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 22px 0 0;
  color: var(--ink-400);
}
.bl-crumb a { text-decoration: none; }
.bl-crumb a:hover { color: var(--ink-900); }
.bl-crumb i { font-style: normal; opacity: 0.4; }

.article-head {
  padding: clamp(28px, 4vw, 52px) 0 clamp(22px, 3vw, 34px);
  border-bottom: 1px solid var(--line);
}
.article-head h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.2vw, 3.1rem);
  line-height: 1.06;
  letter-spacing: -0.035em;
  font-weight: 600;
  margin: 0 0 20px;
  text-wrap: balance;
}
.article-head__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 18px;
  color: var(--ink-400);
}
.article-head__meta span { display: inline-flex; align-items: center; gap: 7px; }
.article-head__meta i { font-style: normal; opacity: 0.4; }

.article-cover {
  margin: clamp(26px, 3.5vw, 42px) 0 0;
  border-radius: var(--r-s);
  overflow: hidden;
  background: var(--paper-200);
}
.article-cover img { width: 100%; }

/* 正文排版 —— 这是整个 blog 最关键的一块 */
.prose {
  padding: clamp(30px, 4vw, 48px) 0 clamp(40px, 5vw, 64px);
  font-size: 17px;
  line-height: 1.78;
  color: var(--ink-800);
}
.prose > *:first-child { margin-top: 0; }
.prose p { margin: 0 0 1.15em; }
.prose h2 {
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2.3vw, 1.75rem);
  line-height: 1.2;
  letter-spacing: -0.025em;
  font-weight: 600;
  color: var(--ink-900);
  margin: 2.1em 0 0.7em;
  padding-top: 0.2em;
  scroll-margin-top: 80px;
}
.prose h3 {
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 1.7vw, 1.28rem);
  line-height: 1.3;
  letter-spacing: -0.018em;
  font-weight: 600;
  color: var(--ink-900);
  margin: 1.7em 0 0.55em;
  scroll-margin-top: 80px;
}
.prose h2 + p, .prose h3 + p { margin-top: 0; }
.prose ul, .prose ol { margin: 0 0 1.2em; padding-left: 1.35em; }
.prose li { margin-bottom: 0.45em; }
.prose li::marker { color: var(--vermilion-500); }
.prose strong { font-weight: 600; color: var(--ink-900); }
.prose em { font-style: italic; }
.prose a {
  color: var(--ink-900);
  text-decoration: underline;
  text-decoration-color: var(--vermilion-500);
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}
.prose a:hover { color: var(--vermilion-600); }
.prose code {
  font-family: var(--font-mono);
  font-size: 0.86em;
  background: rgba(20, 23, 15, 0.055);
  padding: 0.12em 0.38em;
  border-radius: 2px;
  color: var(--ink-900);
}
.prose .md-pre {
  background: var(--ink-900);
  color: rgba(239, 235, 222, 0.9);
  border-radius: var(--r-s);
  padding: 18px 20px;
  overflow-x: auto;
  margin: 0 0 1.4em;
  font-size: 13px;
  line-height: 1.65;
}
.prose .md-pre code {
  background: none;
  padding: 0;
  color: inherit;
  font-size: inherit;
}
.prose blockquote {
  margin: 0 0 1.4em;
  padding: 4px 0 4px 20px;
  border-left: 2px solid var(--vermilion-500);
  color: var(--ink-700);
}
.prose blockquote p { margin: 0 0 0.6em; }
.prose blockquote p:last-child { margin-bottom: 0; }
.prose hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 2.4em 0;
}
.prose img {
  border-radius: var(--r-s);
  margin: 0 0 1.4em;
}
.prose > p:first-of-type {
  font-size: 1.06em;
  color: var(--ink-700);
}

/* 语言切换 */
.lang-switch {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  margin: 0 0 clamp(34px, 4vw, 52px);
}
.lang-switch span {
  color: var(--ink-400);
  margin-right: 4px;
}
.lang-switch a {
  padding: 5px 10px;
  border: 1px solid var(--line);
  border-radius: 2px;
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-600);
}
.lang-switch a:hover { border-color: var(--ink-900); color: var(--ink-900); }
.lang-switch a.on {
  background: var(--ink-900);
  border-color: var(--ink-900);
  color: var(--paper-100);
}

/* --------------------------------------------------------------- 相关 / CTA */
.bl-related {
  border-top: 1px solid var(--line-strong);
  padding: clamp(34px, 4vw, 52px) 0 clamp(50px, 6vw, 76px);
}
.bl-related h2 {
  font-family: var(--font-display);
  font-size: 19px;
  letter-spacing: -0.02em;
  font-weight: 600;
  margin: 0 0 22px;
}
.bl-related__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.bl-related .post-card {
  border-bottom: 0;
  padding: 0;
}
.bl-related .post-card h2 { font-size: 1.05rem; }
.bl-related .post-card p { font-size: 13.5px; -webkit-line-clamp: 2; }

.bl-cta {
  background: var(--ink-900);
  color: var(--paper-100);
  border-radius: var(--r-s);
  padding: clamp(28px, 4vw, 46px);
  margin: 0 0 clamp(50px, 6vw, 76px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  flex-wrap: wrap;
}
.bl-cta h2 {
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2vw, 1.5rem);
  line-height: 1.2;
  letter-spacing: -0.025em;
  font-weight: 600;
  margin: 0 0 8px;
  max-width: 26ch;
}
.bl-cta p {
  margin: 0;
  color: rgba(244, 241, 232, 0.6);
  font-size: 13.5px;
}
.bl-cta a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--paper-100);
  color: var(--ink-900);
  text-decoration: none;
  padding: 13px 20px;
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  white-space: nowrap;
  transition: background 0.15s;
}
.bl-cta a:hover { background: #fff; }

/* --------------------------------------------------------------- 页脚 */
.bl-foot {
  border-top: 1px solid var(--line);
  padding: 30px 0 44px;
  color: var(--ink-400);
  font-size: 12px;
}
.bl-foot__in {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.bl-foot a { text-decoration: none; }
.bl-foot a:hover { color: var(--ink-900); }

/* --------------------------------------------------------------- 响应式 */
@media (max-width: 900px) {
  .bl-grid { grid-template-columns: 1fr; gap: 0; }
  .bl-related__grid { grid-template-columns: 1fr; gap: 22px; }
  .bl-related .post-card { border-bottom: 1px solid var(--line); padding-bottom: 20px; }
}

@media (max-width: 640px) {
  .bl-wrap { padding: 0 18px; }
  .bl-brand__sub { display: none; }
  .bl-nav { gap: 14px; }
  .bl-nav a { font-size: 9.5px; letter-spacing: 0.08em; }
  .prose { font-size: 16px; line-height: 1.72; }
  .post-card--lead { padding: 26px 0 28px; }
  .bl-cta { flex-direction: column; align-items: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}