/* ==========================================================================
   山水云 (shanshui-yun.buzz) - 新中式水墨云峦雅致杂志风 (Contemporary Oriental Ink-Wash & Mist Editorial)
   Palette:
   - Rice-paper Ivory (宣纸米白): #F7F5F0
   - Warm Silk Card (素绢浅褐): #EFECE4
   - Border / Divider (水墨淡痕): #DCD6C8
   - Pine-soot Ink (松烟墨黑): #1C2421
   - Muted Stone Ink (苍石灰墨): #4E5954
   - Mineral Verdigris (石绿青碧): #2A6F68
   - Deep Verdigris (深碧松青): #1D524C
   - Cinnabar Vermilion (朱砂印泥): #C84B31
   - Warm Gold Mist (流金微光): #B88B4A
   ========================================================================== */

:root {
  --bg-paper: #F7F5F0;
  --bg-card: #EFECE4;
  --bg-card-hover: #E7E2D6;
  --bg-ink-dark: #19211E;
  --ink-primary: #1C2421;
  --ink-secondary: #4E5954;
  --ink-muted: #76807B;
  --verdigris: #2A6F68;
  --verdigris-dark: #1D524C;
  --verdigris-soft: rgba(42, 111, 104, 0.1);
  --cinnabar: #C84B31;
  --cinnabar-dark: #A6361F;
  --cinnabar-soft: rgba(200, 75, 49, 0.1);
  --gold-accent: #B88B4A;
  --border-ink: #DCD6C8;
  --border-strong: #C2B9A7;
  --font-serif: "Songti SC", "Noto Serif SC", "Source Han Serif SC", "STSong", "SimSun", Georgia, serif;
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, sans-serif;
  --shadow-soft: 0 10px 30px -8px rgba(28, 36, 33, 0.07);
  --shadow-elevated: 0 18px 42px -10px rgba(28, 36, 33, 0.12);
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-paper);
  color: var(--ink-primary);
}

body {
  font-family: var(--font-sans);
  line-height: 1.75;
  color: var(--ink-primary);
  background-color: var(--bg-paper);
  background-image: 
    radial-gradient(circle at 12% 8%, rgba(42, 111, 104, 0.05) 0%, transparent 40%),
    radial-gradient(circle at 88% 22%, rgba(200, 75, 49, 0.04) 0%, transparent 38%),
    radial-gradient(circle at 50% 85%, rgba(184, 139, 74, 0.05) 0%, transparent 45%);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Global Hyperlink Consistency - Prominent & Never Changes Before/After Visited */
a, a:visited {
  color: var(--cinnabar);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-thickness: 1.5px;
  text-decoration-color: rgba(200, 75, 49, 0.45);
  transition: color 0.2s ease, text-decoration-color 0.2s ease, background-color 0.2s ease;
}

a:hover, a:focus {
  color: var(--verdigris);
  text-decoration-color: var(--verdigris);
}

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  color: var(--ink-primary);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: 0.02em;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Subtle Ink-Wash Divider */
.ink-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, var(--border-strong) 20%, var(--verdigris) 50%, var(--border-strong) 80%, transparent 100%);
  opacity: 0.45;
  margin: 0 auto;
  max-width: 1152px;
}

/* Seal Badge (朱砂印章标识) */
.seal-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 12px;
  background-color: var(--cinnabar-soft);
  border: 1px solid rgba(200, 75, 49, 0.35);
  color: var(--cinnabar);
  font-family: var(--font-serif);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  border-radius: var(--radius-sm);
}

.seal-stamp {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  background-color: var(--cinnabar);
  color: #F7F5F0;
  font-family: var(--font-serif);
  font-size: 0.72rem;
  font-weight: 700;
  border-radius: 2px;
  line-height: 1;
  box-shadow: inset 0 0 0 1px rgba(247, 245, 240, 0.35);
}

/* ==========================================================================
   Header & Navigation (Desktop & Mobile Always Visible)
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(247, 245, 240, 0.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-ink);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  gap: 20px;
  flex-wrap: wrap;
}

.brand-logo, .brand-logo:visited {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--ink-primary);
}

.brand-logo:hover {
  color: var(--verdigris);
}

.brand-logo svg {
  width: 46px;
  height: 46px;
  flex-shrink: 0;
}

.brand-text-wrap {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--ink-primary);
  line-height: 1.15;
}

.brand-sub {
  font-size: 0.72rem;
  color: var(--ink-secondary);
  letter-spacing: 0.14em;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.main-nav a, .main-nav a:visited {
  text-decoration: none;
  color: var(--ink-primary);
  font-size: 0.94rem;
  font-weight: 500;
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
  border: 1px solid transparent;
}

.main-nav a:hover, .main-nav a.active {
  color: var(--verdigris-dark);
  background-color: var(--verdigris-soft);
  border-color: rgba(42, 111, 104, 0.22);
}

.main-nav a.nav-hub, .main-nav a.nav-hub:visited {
  color: var(--cinnabar);
  background-color: var(--cinnabar-soft);
  border: 1px solid rgba(200, 75, 49, 0.3);
  font-family: var(--font-serif);
  font-weight: 700;
}

.main-nav a.nav-hub:hover {
  background-color: var(--cinnabar);
  color: #F7F5F0;
}

.header-cta, .header-cta:visited {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 18px;
  background-color: var(--verdigris);
  color: #F7F5F0;
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px solid var(--verdigris-dark);
  transition: all 0.2s ease;
}

.header-cta:hover {
  background-color: var(--verdigris-dark);
  color: #F7F5F0;
  transform: translateY(-1px);
}

/* ==========================================================================
   Hero Section - Asymmetric Editorial Layout
   ========================================================================== */
.hero-section {
  padding: 64px 0 72px;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: 44px;
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 20px;
}

.hero-title {
  font-size: clamp(2.1rem, 3.8vw, 3.15rem);
  color: var(--ink-primary);
  line-height: 1.24;
  letter-spacing: 0.02em;
}

.hero-title .highlight-ink {
  color: var(--verdigris);
  border-bottom: 3px solid rgba(200, 75, 49, 0.45);
  padding-bottom: 2px;
}

.hero-subtitle {
  font-size: 1.08rem;
  color: var(--ink-secondary);
  line-height: 1.8;
  max-width: 580px;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  width: 100%;
  padding: 18px 20px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-ink);
  border-left: 3px solid var(--verdigris);
  border-radius: var(--radius-sm);
  margin: 4px 0;
}

.metric-item {
  display: flex;
  flex-direction: column;
}

.metric-val {
  font-family: var(--font-serif);
  font-size: 1.38rem;
  font-weight: 700;
  color: var(--verdigris-dark);
}

.metric-label {
  font-size: 0.82rem;
  color: var(--ink-secondary);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 6px;
  width: 100%;
}

.btn-primary, .btn-primary:visited {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 28px;
  background-color: var(--cinnabar);
  color: #F7F5F0;
  text-decoration: none;
  font-size: 1.02rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px solid var(--cinnabar-dark);
  box-shadow: 0 8px 20px -4px rgba(200, 75, 49, 0.35);
  transition: all 0.25s ease;
}

.btn-primary:hover {
  background-color: var(--cinnabar-dark);
  color: #F7F5F0;
  transform: translateY(-2px);
  box-shadow: 0 12px 24px -4px rgba(200, 75, 49, 0.48);
}

.btn-secondary, .btn-secondary:visited {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 26px;
  background-color: var(--bg-card);
  color: var(--verdigris-dark);
  text-decoration: none;
  font-size: 1.02rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--verdigris);
  transition: all 0.25s ease;
}

.btn-secondary:hover {
  background-color: var(--verdigris);
  color: #F7F5F0;
  transform: translateY(-2px);
}

.hero-visual {
  position: relative;
  background-color: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  padding: 14px;
  box-shadow: var(--shadow-elevated);
}

.hero-visual::before {
  content: "山 水 云 · 青 绿 专 线 图 卷";
  display: block;
  font-family: var(--font-serif);
  font-size: 0.78rem;
  color: var(--ink-secondary);
  letter-spacing: 0.2em;
  text-align: center;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-ink);
  margin-bottom: 10px;
}

.hero-anim-img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-sm);
}

.hero-visual-caption {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 10px;
  font-size: 0.8rem;
  color: var(--ink-secondary);
}

/* ==========================================================================
   Section Headers & Common Layouts
   ========================================================================== */
.section-block {
  padding: 76px 0;
}

.section-block.alt-bg {
  background-color: rgba(239, 236, 228, 0.65);
  border-top: 1px solid var(--border-ink);
  border-bottom: 1px solid var(--border-ink);
}

.section-header {
  max-width: 720px;
  margin: 0 auto 48px;
  text-align: center;
}

.section-header .seal-badge {
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(1.75rem, 3vw, 2.35rem);
  margin-bottom: 14px;
  color: var(--ink-primary);
}

.section-desc {
  color: var(--ink-secondary);
  font-size: 1.02rem;
}

/* ==========================================================================
   Core Advantages & Streaming/AI Grids (4 Cards)
   ========================================================================== */
.cards-grid-4 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 26px;
}

.editorial-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-ink);
  border-top: 3px solid var(--verdigris);
  border-radius: var(--radius-md);
  padding: 30px 28px;
  box-shadow: var(--shadow-soft);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
  display: flex;
  flex-direction: column;
  gap: 14px;
  position: relative;
}

.editorial-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-elevated);
  border-top-color: var(--cinnabar);
}

.card-top-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-icon-wrap {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  background-color: rgba(42, 111, 104, 0.09);
  border: 1px solid rgba(42, 111, 104, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-icon-wrap svg {
  width: 30px;
  height: 30px;
}

.card-index {
  font-family: var(--font-serif);
  font-size: 0.85rem;
  color: var(--cinnabar);
  background-color: var(--cinnabar-soft);
  padding: 3px 10px;
  border-radius: 2px;
  border: 1px solid rgba(200, 75, 49, 0.25);
}

.editorial-card h3 {
  font-size: 1.3rem;
  color: var(--ink-primary);
}

.editorial-card p {
  color: var(--ink-secondary);
  font-size: 0.96rem;
  line-height: 1.75;
}

.card-tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: auto;
  padding-top: 10px;
  border-top: 1px dashed var(--border-ink);
}

.card-tag {
  font-size: 0.78rem;
  padding: 3px 9px;
  background-color: var(--bg-paper);
  color: var(--verdigris-dark);
  border: 1px solid var(--border-ink);
  border-radius: 2px;
}

/* ==========================================================================
   Pricing Section & Comparison Table
   ========================================================================== */
.pricing-cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
  margin-bottom: 42px;
}

.pricing-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  padding: 34px 28px;
  display: flex;
  flex-direction: column;
  position: relative;
  box-shadow: var(--shadow-soft);
}

.pricing-card.featured {
  background-color: #F4EFE4;
  border: 2px solid var(--cinnabar);
  box-shadow: var(--shadow-elevated);
}

.pricing-ribbon {
  position: absolute;
  top: -13px;
  right: 24px;
  background-color: var(--cinnabar);
  color: #F7F5F0;
  font-family: var(--font-serif);
  font-size: 0.8rem;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 2px;
  letter-spacing: 0.08em;
}

.tier-name {
  font-family: var(--font-serif);
  font-size: 1.45rem;
  color: var(--ink-primary);
  margin-bottom: 6px;
}

.tier-sub {
  font-size: 0.88rem;
  color: var(--ink-secondary);
  margin-bottom: 20px;
}

.tier-price {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 22px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border-ink);
}

.price-currency {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  color: var(--cinnabar);
  font-weight: 700;
}

.price-num {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--ink-primary);
  line-height: 1;
}

.price-period {
  font-size: 0.9rem;
  color: var(--ink-secondary);
}

.tier-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 28px;
  flex-grow: 1;
}

.tier-features li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.94rem;
  color: var(--ink-secondary);
}

.tier-features li::before {
  content: "◆";
  color: var(--verdigris);
  font-size: 0.75rem;
  margin-top: 3px;
  flex-shrink: 0;
}

.table-scroll-wrap {
  overflow-x: auto;
  background-color: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  min-width: 640px;
}

.comparison-table th,
.comparison-table td {
  padding: 15px 20px;
  border-bottom: 1px solid var(--border-ink);
  font-size: 0.94rem;
}

.comparison-table th {
  background-color: rgba(42, 111, 104, 0.08);
  font-family: var(--font-serif);
  color: var(--ink-primary);
  font-weight: 700;
}

.comparison-table tr:last-child td {
  border-bottom: none;
}

/* ==========================================================================
   FAQ & Testimonials
   ========================================================================== */
.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.faq-item {
  background-color: var(--bg-card);
  border: 1px solid var(--border-ink);
  border-left: 3px solid var(--cinnabar);
  border-radius: var(--radius-sm);
  padding: 24px 26px;
}

.faq-item h3 {
  font-size: 1.15rem;
  margin-bottom: 10px;
  color: var(--ink-primary);
}

.faq-item p {
  font-size: 0.95rem;
  color: var(--ink-secondary);
  line-height: 1.75;
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.testimonial-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-ink);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 18px;
  position: relative;
}

.quote-text {
  font-size: 0.96rem;
  color: var(--ink-primary);
  line-height: 1.8;
  font-style: normal;
}

.quote-author {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid var(--border-ink);
}

.author-name {
  font-family: var(--font-serif);
  font-weight: 700;
  color: var(--ink-primary);
  font-size: 0.98rem;
}

.author-role {
  font-size: 0.82rem;
  color: var(--verdigris-dark);
}

/* ==========================================================================
   Hub Page & Article Pages
   ========================================================================== */
.page-banner {
  padding: 56px 0 42px;
  border-bottom: 1px solid var(--border-ink);
  background: linear-gradient(180deg, rgba(239, 236, 228, 0.7) 0%, rgba(247, 245, 240, 0) 100%);
}

.article-cards-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  padding: 48px 0 72px;
}

.article-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  padding: 30px 28px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  box-shadow: var(--shadow-soft);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.article-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-elevated);
}

.article-meta-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--ink-secondary);
}

.article-cat {
  color: var(--verdigris-dark);
  background-color: var(--verdigris-soft);
  padding: 3px 10px;
  border-radius: 2px;
  font-weight: 600;
}

.article-card h2 {
  font-size: 1.32rem;
  line-height: 1.42;
}

.article-card h2 a, .article-card h2 a:visited {
  color: var(--ink-primary);
  text-decoration: none;
}

.article-card h2 a:hover {
  color: var(--cinnabar);
}

.article-excerpt {
  font-size: 0.95rem;
  color: var(--ink-secondary);
  line-height: 1.75;
  flex-grow: 1;
}

.article-readmore, .article-readmore:visited {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--cinnabar);
  text-decoration: none;
  margin-top: 6px;
}

.article-readmore:hover {
  color: var(--verdigris);
}

/* Single Article Content */
.article-container {
  max-width: 860px;
  margin: 0 auto;
  padding: 48px 24px 72px;
}

.article-header {
  margin-bottom: 36px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-strong);
}

.article-header h1 {
  font-size: clamp(1.75rem, 3.2vw, 2.45rem);
  margin: 14px 0 16px;
}

.article-byline {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  font-size: 0.88rem;
  color: var(--ink-secondary);
}

.article-body {
  background-color: var(--bg-card);
  border: 1px solid var(--border-ink);
  border-radius: var(--radius-md);
  padding: 40px 44px;
  box-shadow: var(--shadow-soft);
}

.article-body h2 {
  font-size: 1.48rem;
  margin: 34px 0 14px;
  padding-left: 14px;
  border-left: 4px solid var(--verdigris);
}

.article-body h2:first-child {
  margin-top: 0;
}

.article-body h3 {
  font-size: 1.18rem;
  margin: 24px 0 10px;
  color: var(--verdigris-dark);
}

.article-body p {
  margin-bottom: 18px;
  font-size: 1.02rem;
  line-height: 1.88;
  color: var(--ink-primary);
  text-align: justify;
}

.article-body ul, .article-body ol {
  margin: 14px 0 22px 24px;
  color: var(--ink-primary);
}

.article-body li {
  margin-bottom: 8px;
  line-height: 1.8;
}

.article-cta-box {
  margin: 36px 0 12px;
  padding: 28px 30px;
  background-color: var(--bg-paper);
  border: 1.5px solid var(--cinnabar);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.related-section {
  margin-top: 48px;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 20px;
}

.related-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-ink);
  padding: 20px;
  border-radius: var(--radius-sm);
}

.related-card h3 {
  font-size: 1.02rem;
  margin-bottom: 8px;
}

/* ==========================================================================
   Footer - Strictly Only the 4 Required Chinese Links
   ========================================================================== */
.site-footer {
  background-color: var(--bg-card);
  border-top: 1px solid var(--border-strong);
  padding: 36px 0;
  margin-top: 40px;
}

.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 36px;
  flex-wrap: wrap;
}

.footer-nav a, .footer-nav a:visited {
  font-family: var(--font-serif);
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--ink-primary);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: color 0.2s ease, background-color 0.2s ease;
}

.footer-nav a:hover {
  color: var(--cinnabar);
  background-color: var(--cinnabar-soft);
}

/* ==========================================================================
   Responsive Design (Mobile Navigation Always Visible - Rule 7)
   ========================================================================== */
@media (max-width: 960px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
  .pricing-cards-grid,
  .testimonials-grid,
  .related-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .header-inner {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
    padding: 12px 0;
  }

  .header-top-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
  }

  /* Navigation NEVER disappears on mobile */
  .main-nav {
    display: flex !important;
    width: 100%;
    overflow-x: auto;
    flex-wrap: wrap;
    gap: 8px;
    padding: 8px 0 4px;
    border-top: 1px solid var(--border-ink);
  }

  .main-nav a, .main-nav a:visited {
    font-size: 0.88rem;
    padding: 6px 12px;
    background-color: var(--bg-card);
    border: 1px solid var(--border-ink);
    flex-shrink: 0;
  }

  .cards-grid-4,
  .faq-grid,
  .article-cards-grid {
    grid-template-columns: 1fr;
  }

  .hero-metrics {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .article-body {
    padding: 24px 20px;
  }
}