.blog-hero {
  padding-block: clamp(4rem, 9vw, 7rem);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
}

.blog-hero .wrap {
  max-width: var(--wrap);
}

.blog-hero h1 {
  max-width: 14ch;
  margin: 0.8rem 0 0;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: clamp(3rem, 5.3vw, 4.5rem);
  font-weight: 900;
  letter-spacing: -0.055em;
  line-height: 1.02;
}

.blog-hero p {
  max-width: 46rem;
  margin: 1.5rem 0 0;
  color: var(--color-text-muted);
  font-size: clamp(1rem, 2vw, 1.16rem);
  line-height: 1.8;
}

.blog-index-section {
  padding-block: var(--space-section);
}

.blog-toolbar {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 2rem;
  margin-bottom: 2.5rem;
}

.blog-toolbar h2 {
  margin: 0.65rem 0 0;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  line-height: 1.15;
}

.blog-filters {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.5rem;
}

.blog-filter {
  min-height: 2.5rem;
  padding: 0.55rem 0.9rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-s);
  background: var(--color-bg);
  color: var(--color-text-muted);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 650;
  cursor: pointer;
  transition:
    border-color 160ms ease,
    background-color 160ms ease,
    color 160ms ease;
}

.blog-filter:hover {
  border-color: var(--color-accent);
  color: var(--color-accent-dark);
}

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

.blog-filter.is-active {
  border-color: var(--color-accent);
  background: var(--color-accent);
  color: var(--color-bg);
}

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

.blog-card {
  min-width: 0;
}

.article-card {
  position: relative;
  display: flex;
  height: 100%;
  min-height: 19rem;
  flex-direction: column;
  padding: clamp(1.35rem, 3vw, 2rem);
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-m);
  background: var(--color-bg);
  color: var(--color-text);
  text-decoration: none;
  transition:
    border-color 180ms ease,
    transform 180ms ease,
    box-shadow 180ms ease;
}

.article-card::before {
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-border), var(--color-accent));
  content: "";
}

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

.article-card:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

.article-card__meta,
.related-card__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

.article-card h3 {
  margin: 1.25rem 0 0;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 2.3vw, 1.7rem);
  line-height: 1.35;
}

.article-card p {
  margin: 1rem 0 1.5rem;
  color: var(--color-text-muted);
  line-height: 1.78;
}

.article-card__more {
  margin-top: auto;
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
}

.blog-empty {
  padding: 2rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-m);
  background: var(--color-panel);
  color: var(--color-text-muted);
  text-align: center;
}

.breadcrumb-section,
.article-breadcrumb-section {
  padding-top: 2rem;
  padding-bottom: 0;
}

.blog-breadcrumb,
nav.breadcrumb,
nav.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem;
  margin-top: 1.25rem;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.6;
}

.blog-breadcrumb a,
nav.breadcrumb a,
nav.breadcrumbs a {
  color: var(--color-text-muted);
  text-decoration: none;
}

.blog-breadcrumb a:hover,
nav.breadcrumb a:hover,
nav.breadcrumbs a:hover {
  color: var(--color-accent-dark);
}

.blog-breadcrumb a:focus-visible,
nav.breadcrumb a:focus-visible,
nav.breadcrumbs a:focus-visible {
  border-radius: var(--radius-xs);
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.article-hero {
  padding-block: 2.25rem;
  border-bottom: 1px solid var(--color-border);
}

.article-hero__inner {
  max-width: var(--wrap-narrow);
  margin-inline: auto;
}

.article-hero__meta,
.post-hero__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.article-hero h1,
.post-hero h1 {
  max-width: 22ch;
  margin: 0;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 2.6rem);
  font-weight: 850;
  letter-spacing: -0.04em;
  line-height: 1.17;
}

.article-hero__lead,
.post-hero__lead {
  max-width: 48rem;
  margin: 1rem 0 0;
  color: var(--color-text-muted);
  font-size: clamp(1rem, 2vw, 1.15rem);
  line-height: 1.85;
}

.article-content {
  padding-block: clamp(2.25rem, 5vw, 4rem);
}

.prose {
  max-width: var(--wrap-narrow);
  margin-inline: auto;
  color: var(--color-text);
  font-size: 1rem;
  line-height: 1.9;
}

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

.prose p {
  margin: 1.15rem 0;
}

.prose h2 {
  margin: 3.5rem 0 1.15rem;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 3.2vw, 2.25rem);
  letter-spacing: -0.025em;
  line-height: 1.3;
}

.prose > h2:first-of-type {
  margin-top: 0;
}

.prose h3 {
  margin: 2.25rem 0 0.8rem;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 2.4vw, 1.55rem);
  line-height: 1.4;
}

.prose a {
  color: var(--color-accent-dark);
  text-decoration-color: var(--color-accent);
  text-underline-offset: 0.2em;
}

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

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

.prose li + li {
  margin-top: 0.55rem;
}

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

.prose pre {
  max-width: 100%;
  margin: 1.5rem 0;
  padding: 1.2rem;
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-s);
  background: var(--color-panel);
  color: var(--color-text);
  line-height: 1.65;
}

.prose pre code {
  padding: 0;
  border: 0;
  background: transparent;
  color: inherit;
}

.prose blockquote {
  margin: 1.5rem 0;
  padding: 0.25rem 0 0.25rem 1.25rem;
  border-left: 2px solid var(--color-accent);
  color: var(--color-text-muted);
}

.prose img,
.prose svg {
  max-width: 100%;
  height: auto;
}

.prose .data-table,
.prose .data-table-wrap {
  max-width: 100%;
  margin-block: 1.5rem;
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-s);
}

.prose table {
  width: 100%;
  min-width: 38rem;
  border-collapse: collapse;
}

.prose th,
.prose td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--color-border);
  text-align: left;
  vertical-align: top;
}

.prose th {
  background: var(--color-panel);
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: 0.82rem;
}

.prose td {
  color: var(--color-text-muted);
}

.download-endcard {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  max-width: var(--wrap-narrow);
  margin: clamp(2.5rem, 6vw, 4.5rem) auto 0;
  padding: clamp(1.4rem, 4vw, 2.25rem);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-m);
  background: var(--color-panel);
  color: var(--color-text);
}

.download-endcard__eyebrow {
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.download-endcard h2 {
  margin: 0.7rem 0 0;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: clamp(1.45rem, 3vw, 2rem);
  line-height: 1.3;
}

.download-endcard p {
  margin: 0.65rem 0 0;
  color: var(--color-text-muted);
  line-height: 1.7;
}

.related-section {
  padding-block: clamp(3rem, 7vw, 5rem);
  border-top: 1px solid var(--color-border);
}

.related-section__head {
  margin-bottom: 1.5rem;
}

.related-section__head h2 {
  margin: 0.65rem 0 0;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.3rem);
}

#related-posts {
  display: grid;
  /* 3 列塞进 680px 窄版心=196px 文字塔卡(2026-08-18 质检 text-tower 实测),改 2 列 */
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.related-card {
  display: flex;
  min-width: 0;
  min-height: 17rem;
  flex-direction: column;
  padding: 1.35rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-s);
  background: var(--color-bg);
  color: var(--color-text);
  text-decoration: none;
  transition:
    border-color 180ms ease,
    transform 180ms ease;
}

.related-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

.related-card:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

.related-card h3 {
  margin: 1rem 0 0;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: 1.15rem;
  line-height: 1.45;
}

.related-card p {
  margin: 0.8rem 0 1.2rem;
  color: var(--color-text-muted);
  font-size: 0.92rem;
  line-height: 1.7;
}

.related-card__more {
  margin-top: auto;
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
}

#post-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  max-width: var(--wrap-narrow);
  margin: 1rem auto clamp(3rem, 7vw, 5rem);
}

.post-nav__card {
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: 0.65rem;
  padding: 1.25rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-s);
  background: var(--color-bg);
  color: var(--color-text);
  text-decoration: none;
  transition:
    border-color 180ms ease,
    background-color 180ms ease;
}

.post-nav__card:hover {
  border-color: var(--color-accent);
  background: var(--color-panel);
}

.post-nav__card:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

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

.post-nav__label {
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 700;
}

.post-nav__card strong {
  font-family: var(--font-display);
  font-size: 1rem;
  line-height: 1.5;
}

@media (max-width: 52rem) {
  .blog-toolbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .blog-filters {
    justify-content: flex-start;
  }

  .blog-list {
    grid-template-columns: 1fr;
  }

  #related-posts {
    grid-template-columns: 1fr;
  }

  .related-card {
    min-height: 0;
  }
}

@media (max-width: 40rem) {
  .blog-hero {
    padding-block: 3.5rem;
  }

  .blog-hero h1 {
    font-size: clamp(1.75rem, 9vw, 2.5rem);
    line-height: 1.08;
  }

  .article-card {
    min-height: 0;
  }

  .download-endcard {
    align-items: flex-start;
    flex-direction: column;
  }

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

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

@media (prefers-reduced-motion: reduce) {
  .blog-filter,
  .article-card,
  .related-card,
  .post-nav__card {
    transition: none;
  }

  .article-card:hover,
  .related-card:hover {
    transform: none;
  }
}
/* cta-link-unpaint(2026-08-18 六站按钮隐形字复盘):正文链接色规则(.prose a 级,特异性 0-1-1)
   压过按钮类(.btn--main,0-1-0),文末 CTA 文字被染成链接色压在彩色底上隐形(最差对比度 1.0)。
   按钮夺回 base.css 里成对的文字色,并去掉链接下划线 */
.prose a[class*="btn"], .prose a[class*="button"] { text-decoration: none; }
.prose a.btn--main, article a.btn--main { color: var(--color-bg); }

/* article-hero-rhythm-fix(2026-08-18):hero 用 96px 通用节奏+section-head 40px 下距,
   首屏空带 116~137px、hero 与正文空洞 232px(质检 first-screen-band/hero-body-gap 实测);压紧 */
main > .section:first-child { padding-block: 2.5rem 2rem; }
main > .section:first-child + .section { padding-top: 1.5rem; }
main > .section:first-child .section-head { margin-bottom: 1.5rem; }

/* h1-breathe-fix(2026-08-18):压紧 hero 后暴露 section-tag 与 H1 贴死(0px) */
main .section-head h1 { margin-top: 10px; }

/* crumb-redesign(2026-08-18 用户拍板:「所有站点和文章这个位置都不好看」——整条文章标题在
   面包屑里原样复读,桌面拖一长条、移动端折两行吃掉首屏。重设计:13px 弱化单行路标,
   当前页段截断省略(标题就在下方 H1,面包屑只指路不复读);类名 + :has(aria-current) 双保险,
   类名缺失/被翻译的语言版也能命中 */
nav.breadcrumb, nav.breadcrumbs, nav.blog-breadcrumb,
main nav:not(#post-nav):has([aria-current="page"]) {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  min-width: 0;
  overflow: hidden;
  font-size: 0.8125rem;
  line-height: 1.5;
  white-space: nowrap;
  color: inherit;
}
nav.breadcrumb ol,
main nav:not(#post-nav):has([aria-current="page"]) ol {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  min-width: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}
nav.breadcrumb a, nav.breadcrumbs a, nav.blog-breadcrumb a,
main nav:not(#post-nav):has([aria-current="page"]) a {
  color: inherit;
  opacity: 0.62;
  text-decoration: none;
  flex: 0 0 auto;
  transition: opacity 120ms ease, color 120ms ease;
}
nav.breadcrumb a:hover, nav.breadcrumbs a:hover, nav.blog-breadcrumb a:hover,
main nav:not(#post-nav):has([aria-current="page"]) a:hover {
  opacity: 1;
  color: var(--color-accent, var(--color-primary, currentColor));
}
nav.breadcrumb [aria-hidden="true"], nav.breadcrumbs [aria-hidden="true"], nav.blog-breadcrumb [aria-hidden="true"],
main nav:not(#post-nav):has([aria-current="page"]) [aria-hidden="true"] {
  opacity: 0.35;
  flex: 0 0 auto;
}
nav.breadcrumb [aria-current="page"], nav.breadcrumbs [aria-current="page"], nav.blog-breadcrumb [aria-current="page"],
main nav:not(#post-nav):has([aria-current="page"]) [aria-current="page"] {
  flex: 0 1 auto;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 30ch;
  opacity: 0.85;
}

/* crumb-redesign 补丁:3017 v2ray-newbie 变体面包屑套了一层 <p>,flex/截断打不进去——
   p 接管 flex 行,aria-current 段转 inline-block 保证 ellipsis 在非 flex 父里也生效 */
main nav:not(#post-nav):has([aria-current="page"]) > p {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  min-width: 0;
  margin: 0;
  overflow: hidden;
}
nav.breadcrumb [aria-current="page"], nav.breadcrumbs [aria-current="page"], nav.blog-breadcrumb [aria-current="page"],
main nav:not(#post-nav):has([aria-current="page"]) [aria-current="page"] {
  display: inline-block;
  vertical-align: bottom;
}

/* ═══ article-head-spec v1(2026-08-18 用户拍板「一定要设置一个规范」:标题/导语字体太大毫无美感,
   3016 面包屑与 meta 间隙又太小跟下面不协调——字号和间隙全部定死)═══
   字号级距(桌面封顶):H1 32px、导语 18px、H2 24px、H3 20px;移动 H1 24px。
   页头节奏:面包屑↓20px → meta↓14px → H1↓12px → 导语;相邻间隙规范带 10~44px,
   质检三尺硬校验:article-h1-oversize / article-lead-oversize / article-head-rhythm */
main h1 {
  font-size: clamp(1.5rem, 1.1rem + 1.4vw, 2rem) !important;
  line-height: 1.32 !important;
  letter-spacing: -0.01em;
  margin-block: 0.875rem 0.75rem !important;
}
main h1 + p,
main .lead, article .lead, .article-lead, .article-summary {
  font-size: clamp(0.9375rem, 0.85rem + 0.45vw, 1.125rem) !important;
  line-height: 1.7 !important;
  margin-top: 0 !important;
}
.prose h2, .article-body h2 {
  font-size: clamp(1.25rem, 1.05rem + 0.65vw, 1.5rem) !important;
}
.prose h3, .article-body h3 {
  font-size: clamp(1.0625rem, 0.95rem + 0.4vw, 1.25rem) !important;
}
nav.breadcrumb, nav.breadcrumbs, nav.blog-breadcrumb,
main nav:not(#post-nav):has([aria-current="page"]) {
  margin-block: 0 1.25rem !important;
}

/* ═══ blog-components v1(2026-08-18 面板统一追加,勿手改;色调全部 color-mix 吃站点令牌,
   明暗主题自适应)——文章富文本组件词汇表,写作端只填内容不写样式 ═══ */
.bc-summary, .bc-stats, .bc-steps, .bc-compare, .bc-faq, .bc-errors,
.bc-config, .bc-scheme, .bc-insight, .bc-flow { margin: 1.25rem 0; }

/* 色调系统:a=品牌主色 b=品牌强调色 c=青 d=琥珀 e=玫红(低饱和淡染,任何主题都压得住) */
[data-tone="a"], .bc-tone-a { --bc-tone: var(--color-primary, #4f7cff); }
[data-tone="b"], .bc-tone-b { --bc-tone: var(--color-accent, var(--color-primary, #7c5cff)); }
[data-tone="c"], .bc-tone-c { --bc-tone: #0e9f8a; }
[data-tone="d"], .bc-tone-d { --bc-tone: #d97706; }
[data-tone="e"], .bc-tone-e { --bc-tone: #e11d48; }

/* 本文速览卡 */
.bc-summary {
  border: 1px solid color-mix(in srgb, var(--color-primary, #4f7cff) 28%, transparent);
  background: color-mix(in srgb, var(--color-primary, #4f7cff) 7%, transparent);
  border-radius: 12px;
  padding: 0.875rem 1.125rem;
  font-size: 0.9375rem;
  line-height: 1.7;
}
.bc-summary strong { display: block; font-size: 0.8125rem; letter-spacing: 0.02em; opacity: 0.75; margin-bottom: 0.25rem; }
.bc-summary p { margin: 0; font-size: inherit !important; }

/* 数据瓦片行 */
.bc-stats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0.75rem; }
.bc-stats[data-cols="2"] { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.bc-stats[data-cols="4"] { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.bc-stat {
  --bc-tone: var(--color-primary, #4f7cff);
  text-align: center;
  padding: 0.75rem 0.5rem;
  border-radius: 12px;
  border: 1px solid color-mix(in srgb, var(--bc-tone) 26%, transparent);
  background: color-mix(in srgb, var(--bc-tone) 7%, transparent);
}
.bc-stat__num { font-size: 1.375rem; font-weight: 800; line-height: 1.2; color: color-mix(in srgb, var(--bc-tone) 62%, var(--color-text, currentColor)); }
.bc-stat__label { font-size: 0.75rem; opacity: 0.72; margin-top: 0.125rem; line-height: 1.45; }

/* 编号步骤卡 */
.bc-steps { list-style: none; counter-reset: bcstep; padding: 0; display: grid; gap: 0.75rem; }
.bc-step {
  counter-increment: bcstep;
  position: relative;
  padding: 0.875rem 1rem 0.875rem 3.25rem;
  border: 1px solid color-mix(in srgb, var(--color-text, #888) 14%, transparent);
  border-radius: 12px;
  background: color-mix(in srgb, var(--color-text, #888) 3%, transparent);
}
.bc-step::before {
  content: counter(bcstep);
  position: absolute; left: 0.875rem; top: 0.875rem;
  width: 1.75rem; height: 1.75rem; border-radius: 50%;
  display: grid; place-items: center;
  font-size: 0.875rem; font-weight: 700;
  background: var(--color-primary, #4f7cff);
  color: var(--color-bg, var(--color-canvas, #fff));
}
.bc-step h4 { margin: 0 0 0.25rem; font-size: 0.9375rem !important; line-height: 1.5; }
.bc-step p { margin: 0; font-size: 0.875rem; line-height: 1.65; opacity: 0.88; }

/* 对比卡组 */
.bc-compare { display: grid; gap: 0.75rem; }
.bc-compare__item {
  border: 1px solid color-mix(in srgb, var(--color-text, #888) 14%, transparent);
  border-radius: 12px;
  padding: 0.875rem 1rem;
  background: color-mix(in srgb, var(--color-text, #888) 3%, transparent);
}
.bc-compare__item.is-best {
  border: 2px solid color-mix(in srgb, var(--color-primary, #4f7cff) 55%, transparent);
  background: color-mix(in srgb, var(--color-primary, #4f7cff) 6%, transparent);
}
.bc-compare__item > header { display: flex; align-items: center; gap: 0.5rem; margin-bottom: 0.375rem; }
.bc-compare__item h4 { margin: 0; font-size: 0.9375rem !important; line-height: 1.5; }
.bc-compare__tag {
  font-size: 0.6875rem; font-weight: 700; line-height: 1;
  padding: 0.25rem 0.5rem; border-radius: 999px;
  background: var(--color-primary, #4f7cff);
  color: var(--color-bg, var(--color-canvas, #fff));
}
.bc-compare__item p { margin: 0 0 0.375rem; font-size: 0.875rem; line-height: 1.65; opacity: 0.88; }
.bc-compare__scene {
  font-size: 0.8125rem !important; opacity: 1 !important;
  padding: 0.375rem 0.625rem; border-radius: 8px; margin: 0 !important;
  background: color-mix(in srgb, var(--color-primary, #4f7cff) 9%, transparent);
}

/* 问答彩卡 */
.bc-faq { display: grid; gap: 0.75rem; }
.bc-faq__item {
  --bc-tone: var(--color-primary, #4f7cff);
  border: 1px solid color-mix(in srgb, var(--bc-tone) 26%, transparent);
  background: color-mix(in srgb, var(--bc-tone) 6%, transparent);
  border-radius: 12px;
  padding: 0.875rem 1rem;
}
.bc-faq__item h4 { margin: 0 0 0.3125rem; font-size: 0.9375rem !important; line-height: 1.5; }
.bc-faq__item h4::before { content: "Q "; font-weight: 800; color: color-mix(in srgb, var(--bc-tone) 62%, var(--color-text, currentColor)); }
.bc-faq__item p { margin: 0; font-size: 0.875rem; line-height: 1.65; opacity: 0.88; }

/* 报错排查卡 */
.bc-errors { display: grid; gap: 0.75rem; }
.bc-error {
  border: 1px solid color-mix(in srgb, #e11d48 22%, transparent);
  border-left: 4px solid color-mix(in srgb, #e11d48 62%, transparent);
  border-radius: 10px;
  padding: 0.875rem 1rem;
  background: color-mix(in srgb, #e11d48 5%, transparent);
}
.bc-error h4 {
  margin: 0 0 0.3125rem; font-size: 0.875rem !important; line-height: 1.5;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
.bc-error p { margin: 0; font-size: 0.875rem; line-height: 1.65; opacity: 0.88; }

/* 键值配置卡 */
.bc-config { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0.75rem; }
.bc-config__card {
  --bc-tone: var(--color-primary, #4f7cff);
  border: 1px solid color-mix(in srgb, var(--bc-tone) 26%, transparent);
  background: color-mix(in srgb, var(--bc-tone) 6%, transparent);
  border-radius: 12px;
  padding: 0.875rem 1rem;
}
.bc-config__card h4 { margin: 0 0 0.5rem; font-size: 0.9375rem !important; line-height: 1.5; color: color-mix(in srgb, var(--bc-tone) 58%, var(--color-text, currentColor)); }
.bc-config__card dl { margin: 0; display: grid; grid-template-columns: auto 1fr; gap: 0.25rem 0.75rem; font-size: 0.8125rem; line-height: 1.6; }
.bc-config__card dt { font-weight: 600; opacity: 0.7; }
.bc-config__card dd { margin: 0; }
.bc-config__note {
  margin: 0.625rem 0 0 !important; padding: 0.375rem 0.625rem; border-radius: 8px;
  font-size: 0.75rem !important; line-height: 1.55;
  background: color-mix(in srgb, var(--bc-tone) 11%, transparent);
}

/* 双栏方案面板 */
.bc-scheme {
  border: 1px solid color-mix(in srgb, var(--color-primary, #4f7cff) 24%, transparent);
  background: color-mix(in srgb, var(--color-primary, #4f7cff) 4%, transparent);
  border-radius: 14px;
  padding: 1rem 1.125rem;
}
.bc-scheme__title { margin: 0 0 0.75rem; font-size: 1rem !important; line-height: 1.5; }
.bc-scheme__cols { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.bc-scheme__col h5 { margin: 0 0 0.375rem; font-size: 0.875rem; line-height: 1.5; opacity: 0.92; }
.bc-scheme__col ul { margin: 0; padding-left: 1.125rem; font-size: 0.875rem; line-height: 1.7; }
.bc-scheme__note {
  margin: 0.875rem 0 0 !important; padding: 0.5rem 0.75rem; border-radius: 8px;
  font-size: 0.8125rem !important; line-height: 1.6;
  background: color-mix(in srgb, var(--color-primary, #4f7cff) 10%, transparent);
}

/* 洞察结论卡 */
.bc-insight {
  border: 1px solid color-mix(in srgb, #0e9f8a 30%, transparent);
  background: linear-gradient(135deg,
    color-mix(in srgb, #0e9f8a 8%, transparent),
    color-mix(in srgb, var(--color-primary, #4f7cff) 7%, transparent));
  border-radius: 12px;
  padding: 0.875rem 1.125rem;
}
.bc-insight h4 { margin: 0 0 0.25rem; font-size: 0.9375rem !important; line-height: 1.5; }
.bc-insight h4::before { content: "💡 "; }
.bc-insight p { margin: 0; font-size: 0.875rem; line-height: 1.68; opacity: 0.9; }

/* 流程链 */
.bc-flow { display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem; }
.bc-flow span {
  font-size: 0.8125rem; line-height: 1.5;
  padding: 0.375rem 0.75rem; border-radius: 999px;
  border: 1px solid color-mix(in srgb, var(--color-primary, #4f7cff) 30%, transparent);
  background: color-mix(in srgb, var(--color-primary, #4f7cff) 7%, transparent);
}
.bc-flow span:not(:last-child)::after {
  content: "→";
  margin-left: 0.5rem; margin-right: -0.25rem;
  opacity: 0.45;
}

@media (max-width: 720px) {
  .bc-stats, .bc-stats[data-cols="4"] { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .bc-config, .bc-scheme__cols { grid-template-columns: 1fr; }
}

/* ═══ head-rhythm-close(2026-08-18 页头规范收口:面包屑→meta 间隙回 10~44 带)═══ */
/* timeout 变体:裸 nav + article-hero pt36 = 56px */
nav.blog-breadcrumb + section.article-hero { padding-top: 8px !important; }
/* gateway 变体:面包屑 section(pb32)+ 下节 section(pt40) */
main > section.section:has(> .wrap-narrow > nav [aria-current="page"]) { padding-bottom: 0 !important; }
main > section.section:has(> .wrap-narrow > nav [aria-current="page"]) + section.section { padding-top: 8px !important; }

.prose section:has(> article.related-post-card),
.prose-wrap section:has(> article.related-post-card),
.prose section:has(> .related-post-card) {
  display: grid !important;
  grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
  gap: 0.875rem;
}
@media (max-width: 720px) {
  .prose section:has(> article.related-post-card),
  .prose-wrap section:has(> article.related-post-card),
  .prose section:has(> .related-post-card) { grid-template-columns: 1fr !important; }
}

/* ═══ head-zone-v2(2026-08-18 二次复盘:3012 写作后台新模板 post-layout 直挂 main 零内边距,
   面包屑贴顶栏 0px;3014 导语→正文 69px 空洞——上一版规范只定了面包屑↓20/meta↓14/H1↓12,
   头尾两段失守。顶栏→面包屑 24~40 带、导语→正文 24~48 带;容器免疫写法,新老模板通吃,
   质检对应尺 article-head-top / article-lead-body)═══ */
main > :first-child:has(nav[class*="crumb"]),
main > :first-child:has(nav [aria-current="page"]) {
  padding-top: 1.75rem !important;
}
/* 页头独立容器(不含正文)收底,正文容器给顶距:导语→正文 ≈ 8 + 20 + 首段自身上距 */
main > :first-child:has(nav [aria-current="page"]):not(:has(h2, .prose, .article-body, .post-body)) {
  padding-bottom: 0.5rem !important;
}
main > :first-child:has(nav [aria-current="page"]):not(:has(h2, .prose, .article-body, .post-body)) + * {
  padding-top: 1.25rem !important;
}
/* 兄弟是 article/div 包壳的变体:壳里第一个 section 还揣着一份通用节距,归零(3014 病例 pt40) */
main > :first-child:has(nav [aria-current="page"]):not(:has(h2, .prose, .article-body, .post-body)) + :is(article, div) > section:first-child {
  padding-top: 0 !important;
}
/* TOC 全站封杀(2026-08-17)后,老双栏 article-layout 网格没了侧栏会剩一条死柱:无 toc 回退单栏 */
main [class*="article-layout"]:not(:has(nav[class*="toc"], aside[class*="toc"])) { display: block !important; }

/* ═══ head-zone-v2b(2026-08-18 解剖 24 病页:hero pb32~44 + 正文首块 mt64~72/首节 pt115
   三层叠腔,导语→正文实测 77~224px;v2 的 :first-child 容器选择器在 nav 直挂 main 的
   变体(3011A/3012 旧文/3016/3017)全落空——改按元素角色打)═══ */
/* 顶:面包屑自己是 main 第一个孩子的变体,给足呼吸(质检 headTopGap 按内容边量) */
main > nav:first-child { padding-top: 1.75rem !important; }
/* 腰:页头 hero 收底——header 含 H1 一律算 hero;section 形 hero 按类名+构成兜底 */
main header:has(h1) { padding-bottom: 12px !important; }
main section[class*="article-hero"], main section[class*="post-hero"] { padding-bottom: 12px !important; }
main > section:has(h1):not(:has(h2, article, .prose, .article-body)) { padding-bottom: 12px !important; }
/* 页头容器→正文容器交接距(v2 的 1.25rem 在 56px 病例里还嫌厚,压到 8px) */
main > :first-child:has(nav [aria-current="page"]):not(:has(h2, .prose, .article-body, .post-body)) + * { padding-top: 0.5rem !important; }
/* 底:正文首块不吃营销级节距 */
main article > section:first-of-type { padding-top: 0 !important; margin-top: 0 !important; }
main > :is(header, section):has(h1) + section:not(:has(nav [aria-current="page"])) { padding-top: 24px !important; }
main :is(article, .article-body, .post-content, .prose) > :is(h2, h3):first-child,
main article > section:first-of-type > :is(h2, h3):first-child {
  margin-top: 12px !important;
  padding-top: 0 !important;
}

/* ═══ head-zone-v2c(v2b 复测残余 16 病页对症)═══ */
/* 3016 病例:hero 里嵌套的 section-head 原本 pb0,被 header:has(h1) 冤枉垫了 12px——退回 */
main section header[class*="section-head"]:has(h1) { padding-bottom: 0 !important; }
/* 3012 病谱:正文 section 藏在 .article-body/.post-content 壳里,首节和它的 h2(mt64/pt8)没剥到 */
main :is(article, .article-body, .post-content, .prose) > section:first-of-type { padding-top: 0 !important; margin-top: 0 !important; }
main :is(article, .article-body, .post-content, .prose) > section:first-of-type > :is(h2, h3):first-child { margin-top: 12px !important; padding-top: 0 !important; }
/* 3017 病例:正文首块是壳里首节的 h3(mt36) */
main :is(article, .article-body, .post-content, .prose) > :is(h2, h3):first-child { margin-top: 12px !important; padding-top: 0 !important; }
/* 3015 病例:hero 后首节 24px 还是把总账顶到 68——收到 16px */
main > :is(header, section):has(h1) + section:not(:has(nav [aria-current="page"])) { padding-top: 16px !important; }