/* ============================================
   NoticeFlow — design tokens
   ============================================ */
:root {
  --ink: #F2F4F8;
  --ink-soft: #9099AC;
  --paper: #0A0E14;
  --panel: #11151E;
  --line: #232A38;
  --blue: #3B82F6;
  --blue-deep: #93C0FF;
  --blue-pale: #142235;
  --mono: 'IBM Plex Mono', monospace;
  --sans: 'IBM Plex Sans', -apple-system, sans-serif;
  --serif: 'Source Serif 4', Georgia, serif;
  --radius: 3px;
  --grad-hero: radial-gradient(ellipse 900px 500px at 75% 0%, rgba(59,130,246,0.16), transparent 65%);
  --grad-line: linear-gradient(90deg, transparent, rgba(59,130,246,0.5), transparent);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

img { max-width: 100%; display: block; }

.wrap {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 32px;
}

/* ============================================
   Header
   ============================================ */
.top-banner {
  background: var(--blue-pale);
  border-bottom: 1px solid #29406B;
  text-align: center;
  padding: 9px 16px;
  font-family: var(--mono);
  font-size: 12.5px;
  font-weight: 500;
  color: var(--blue-deep);
  letter-spacing: 0.01em;
}
.top-banner span.flag { margin-right: 2px; }

.site-header {
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  background: rgba(10,14,20,0.92);
  backdrop-filter: blur(8px);
  z-index: 50;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 18px;
  letter-spacing: -0.01em;
}
.logo-mark {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.logo-mark svg { width: 26px; height: 26px; }
nav.main-nav {
  display: flex;
  align-items: center;
  gap: 36px;
}
.main-nav a.nav-link {
  font-size: 14.5px;
  font-weight: 500;
  color: var(--ink-soft);
  transition: color 0.15s;
}
.main-nav a.nav-link:hover,
.main-nav a.nav-link.active { color: var(--ink); }
.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--sans);
  font-size: 14.5px;
  font-weight: 600;
  padding: 10px 20px;
  border-radius: var(--radius);
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--blue), #2563EB);
  color: #FFFFFF;
  box-shadow: 0 0 0 1px rgba(59,130,246,0.4), 0 8px 20px -6px rgba(59,130,246,0.5);
}
.btn-primary:hover {
  background: linear-gradient(135deg, #2563EB, #1D4ED8);
  box-shadow: 0 0 0 1px rgba(59,130,246,0.5), 0 10px 26px -6px rgba(59,130,246,0.6);
}
.btn-ghost { color: var(--ink); border-color: var(--line); background: var(--paper); }
.btn-ghost:hover { border-color: var(--ink); }
.btn-lg { padding: 14px 28px; font-size: 15.5px; }
.btn-block { width: 100%; }

/* ============================================
   Eyebrow / stamp tag
   ============================================ */
.stamp {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--blue-deep);
  background: var(--blue-pale);
  border: 1px solid #29406B;
  border-radius: 2px;
  padding: 5px 10px;
}
.stamp-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--blue);
}

/* ============================================
   Hero
   ============================================ */
.hero {
  padding: 96px 0 80px;
  border-bottom: 1px solid var(--line);
  background-image: var(--grad-hero);
  position: relative;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 64px;
  align-items: center;
}
.hero h1 {
  font-size: 50px;
  line-height: 1.06;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 20px 0 22px;
}
.hero h1 em {
  font-style: normal;
  background: linear-gradient(120deg, var(--blue), #7FB1FF);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-sub {
  font-size: 18px;
  color: var(--ink-soft);
  max-width: 480px;
  margin-bottom: 32px;
}
.hero-actions {
  display: flex;
  gap: 14px;
  margin-bottom: 36px;
}
.trust-row {
  display: flex;
  gap: 28px;
  flex-wrap: wrap;
}
.trust-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--ink-soft);
}
.trust-item .dot { color: var(--blue); font-size: 16px; }

/* Hero visual: document/filing card stack */
.hero-visual {
  position: relative;
  height: 380px;
}
.doc-card {
  position: absolute;
  width: 290px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 16px 36px -8px rgba(0,0,0,0.5);
  padding: 20px 22px;
}
.doc-card.back {
  top: 0;
  right: 0;
  opacity: 0.5;
  transform: rotate(3deg);
}
.doc-card.front {
  top: 56px;
  right: 36px;
}
.doc-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  border-bottom: 1px solid var(--line);
  padding-bottom: 12px;
  margin-bottom: 14px;
}
.doc-title { font-size: 13px; font-weight: 600; }
.doc-sub { font-size: 11px; color: var(--ink-soft); margin-top: 2px; font-family: var(--mono); }
.doc-status {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.05em;
  padding: 3px 8px;
  border-radius: 2px;
  background: var(--blue-pale);
  color: var(--blue-deep);
  border: 1px solid #29406B;
}
.doc-row {
  display: flex;
  justify-content: space-between;
  font-size: 12.5px;
  padding: 6px 0;
  color: var(--ink-soft);
}
.doc-row span:last-child { color: var(--ink); font-weight: 500; }

/* ============================================
   Section scaffolding
   ============================================ */
section { padding: 80px 0; }
.section-tight { padding: 64px 0; }
.section-head {
  max-width: 620px;
  margin-bottom: 48px;
}
.section-head h2 {
  font-size: 34px;
  font-weight: 600;
  letter-spacing: -0.015em;
  margin-top: 16px;
  line-height: 1.15;
}
.section-head p {
  font-size: 16.5px;
  color: var(--ink-soft);
  margin-top: 14px;
}
.section-panel { background: var(--panel); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }

/* ============================================
   Problem section
   ============================================ */
.problem-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: start;
}
.problem-copy h2 { font-size: 30px; font-weight: 600; letter-spacing: -0.015em; line-height: 1.2; margin-bottom: 18px; }
.problem-copy p { font-size: 16px; color: var(--ink-soft); }
.problem-list { display: flex; flex-direction: column; gap: 14px; }
.problem-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 16px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.problem-item .num {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--blue);
  border: 1px solid var(--line);
  border-radius: 2px;
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.problem-item-text { font-size: 14.5px; }
.problem-item-text strong { display: block; font-weight: 600; margin-bottom: 2px; }
.problem-item-text span { color: var(--ink-soft); font-size: 13.5px; }

/* ============================================
   How it works steps
   ============================================ */
.steps-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.step-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 24px;
  background: var(--paper);
}
.step-num {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--blue);
  margin-bottom: 16px;
}
.step-card h3 { font-size: 18px; font-weight: 600; margin-bottom: 10px; }
.step-card p { font-size: 14.5px; color: var(--ink-soft); }

.steps-detailed {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.step-detail {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 28px;
  padding: 36px 0;
  border-bottom: 1px solid var(--line);
}
.step-detail:last-child { border-bottom: none; }
.step-detail .step-marker {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--blue);
  border: 1.5px solid var(--blue);
  border-radius: 50%;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.step-detail h3 { font-size: 21px; font-weight: 600; margin-bottom: 8px; }
.step-detail p.step-lead { font-size: 15.5px; color: var(--ink-soft); margin-bottom: 16px; max-width: 540px; }
.step-detail ul { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.step-detail li {
  font-size: 14.5px;
  color: var(--ink);
  padding-left: 20px;
  position: relative;
}
.step-detail li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 8px;
  height: 1.5px;
  background: var(--blue);
}

/* Timeline strip */
.timeline-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.timeline-cell {
  padding: 28px 24px;
  border-right: 1px solid var(--line);
  background: var(--paper);
}
.timeline-cell:last-child { border-right: none; }
.timeline-cell .t-label { font-family: var(--mono); font-size: 11px; color: var(--ink-soft); text-transform: uppercase; letter-spacing: 0.06em; }
.timeline-cell .t-value { font-size: 22px; font-weight: 600; margin: 8px 0 6px; }
.timeline-cell .t-desc { font-size: 13.5px; color: var(--ink-soft); }

/* ============================================
   Feature grid
   ============================================ */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.feature-cell {
  background: var(--paper);
  padding: 28px 26px;
}
.feature-cell h3 { font-size: 16px; font-weight: 600; margin-bottom: 8px; }
.feature-cell p { font-size: 13.5px; color: var(--ink-soft); }
.feature-icon {
  width: 34px;
  height: 34px;
  border-radius: var(--radius);
  background: var(--blue-pale);
  color: var(--blue-deep);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
  font-weight: 600;
  font-size: 14px;
  margin-bottom: 16px;
}

/* ============================================
   Pricing
   ============================================ */
.pricing-hero { text-align: center; padding: 72px 0 8px; }
.pricing-hero .stamp { margin-bottom: 18px; }
.pricing-hero h1 { font-size: 42px; font-weight: 600; letter-spacing: -0.02em; margin-bottom: 16px; }
.pricing-hero p { font-size: 17px; color: var(--ink-soft); max-width: 560px; margin: 0 auto; }

.calc-panel {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 36px 40px;
  margin-top: 48px;
}
.calc-head { margin-bottom: 28px; }
.calc-head h3 { font-size: 18px; font-weight: 600; margin-bottom: 4px; }
.calc-head p { font-size: 13.5px; color: var(--ink-soft); }

.slider-row {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 28px;
}
.slider-row label { font-size: 14px; font-weight: 500; color: var(--ink-soft); min-width: 130px; }
input[type=range] {
  flex: 1;
  accent-color: var(--blue);
  height: 4px;
}
.slider-readout {
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 600;
  min-width: 56px;
  text-align: right;
}

.calc-results {
  background: var(--panel);
  border-radius: var(--radius);
  padding: 22px 24px;
  margin-bottom: 20px;
}
.calc-line {
  display: flex;
  justify-content: space-between;
  font-size: 14px;
  padding: 7px 0;
  color: var(--ink-soft);
}
.calc-line span:last-child { color: var(--ink); font-weight: 500; font-family: var(--mono); }
.calc-total {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  border-top: 1px solid var(--line);
  margin-top: 8px;
  padding-top: 14px;
}
.calc-total span:first-child { font-size: 15px; font-weight: 600; }
.calc-total span:last-child { font-size: 30px; font-weight: 600; font-family: var(--mono); color: var(--blue-deep); }

.tier-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
.tier-cell {
  border: 1.5px solid var(--line);
  border-radius: var(--radius);
  padding: 12px 10px;
  text-align: center;
  transition: border-color 0.15s;
}
.tier-cell.active { border-color: var(--blue); background: var(--blue-pale); }
.tier-cell .tc-label { font-family: var(--mono); font-size: 11px; color: var(--ink-soft); }
.tier-cell .tc-price { font-size: 15px; font-weight: 600; margin-top: 4px; }

.included-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px 32px;
  margin-top: 16px;
}
.included-item { display: flex; gap: 12px; align-items: flex-start; }
.included-check {
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--blue);
  color: var(--paper);
  font-size: 11px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  margin-top: 1px;
  font-weight: 700;
}
.included-item strong { display: block; font-size: 14.5px; font-weight: 600; margin-bottom: 2px; }
.included-item span { font-size: 13.5px; color: var(--ink-soft); }

/* ============================================
   CTA band
   ============================================ */
.cta-band {
  background: var(--panel);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  color: var(--ink);
  text-align: center;
  padding: 72px 0;
}
.cta-band h2 { font-size: 32px; font-weight: 600; letter-spacing: -0.015em; margin-bottom: 14px; }
.cta-band p { font-size: 16px; color: var(--ink-soft); margin-bottom: 32px; }
.cta-band .btn-primary { background: var(--blue); }
.cta-band .btn-ghost { background: transparent; border-color: var(--line); color: var(--ink); }
.cta-actions { display: flex; gap: 14px; justify-content: center; }

/* ============================================
   Footer
   ============================================ */
footer { border-top: 1px solid var(--line); padding: 48px 0 32px; }
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 36px;
}
.footer-brand .logo { margin-bottom: 14px; }
.footer-brand p { font-size: 13.5px; color: var(--ink-soft); max-width: 280px; }
.footer-col h4 { font-size: 12.5px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em; color: var(--ink-soft); margin-bottom: 14px; }
.footer-col a { display: block; font-size: 14px; color: var(--ink); padding: 5px 0; }
.footer-col a:hover { color: var(--blue); }
.footer-bottom {
  border-top: 1px solid var(--line);
  padding-top: 24px;
  font-size: 13px;
  color: var(--ink-soft);
}

/* ============================================
   Nav dropdown
   ============================================ */
.nav-item-drop { position: relative; }
.nav-item-drop > .nav-link { display: flex; align-items: center; gap: 5px; cursor: pointer; }
.nav-item-drop .chev { width: 11px; height: 11px; transition: transform 0.15s; }
.nav-item-drop:hover .chev { transform: rotate(180deg); }
.dropdown-panel {
  position: absolute;
  top: 100%;
  left: -16px;
  margin-top: 14px;
  width: 300px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 8px;
  box-shadow: 0 16px 36px -8px rgba(0,0,0,0.5);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: all 0.15s;
}
.nav-item-drop:hover .dropdown-panel { opacity: 1; visibility: visible; transform: translateY(0); }
.dropdown-panel a {
  display: block;
  padding: 10px 12px;
  border-radius: 4px;
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
}
.dropdown-panel a:hover { background: var(--blue-pale); color: var(--blue-deep); }
.dropdown-panel a span {
  display: block;
  font-size: 12px;
  color: var(--ink-soft);
  font-weight: 400;
  margin-top: 2px;
}

/* ============================================
   FAQ accordion
   ============================================ */
.faq-list { max-width: 760px; margin: 0 auto; display: flex; flex-direction: column; gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.faq-item { background: var(--paper); }
.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 24px;
  background: none;
  border: none;
  text-align: left;
  font-family: var(--sans);
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
}
.faq-q .faq-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  position: relative;
  transition: transform 0.2s;
}
.faq-q .faq-icon::before,
.faq-q .faq-icon::after {
  content: '';
  position: absolute;
  background: var(--blue);
  top: 50%; left: 50%;
  transform: translate(-50%,-50%);
}
.faq-q .faq-icon::before { width: 14px; height: 1.5px; }
.faq-q .faq-icon::after { width: 1.5px; height: 14px; transition: transform 0.2s; }
.faq-item.open .faq-icon::after { transform: translate(-50%,-50%) rotate(90deg) scale(0); }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.2s ease;
}
.faq-a-inner { padding: 0 24px 22px; font-size: 14.5px; color: var(--ink-soft); max-width: 620px; }
.faq-item.open .faq-a { max-height: 400px; }

/* ============================================
   Integration cards
   ============================================ */
.integration-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.integration-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 28px 24px;
  text-align: center;
  display: flex;
  flex-direction: column;
}
.integration-logo {
  width: 56px; height: 56px;
  border-radius: 10px;
  background: var(--paper);
  border: 1px solid var(--line);
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 18px;
  padding: 10px;
}
.integration-logo img, .integration-logo svg { width: 100%; height: 100%; }
.integration-card h3 { font-size: 17px; font-weight: 600; margin-bottom: 8px; }
.integration-card p { font-size: 13.5px; color: var(--ink-soft); margin-bottom: 16px; flex: 1; }
.integration-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--blue-deep);
  background: var(--blue-pale);
  padding: 4px 10px;
  border-radius: 2px;
  margin-bottom: 18px;
  align-self: center;
}
.integration-card .btn { width: 100%; }

/* ============================================
   Resource / article cards
   ============================================ */
.resource-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.resource-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 26px;
  transition: border-color 0.15s;
}
.resource-card:hover { border-color: var(--blue); }
.resource-card .stamp { margin-bottom: 14px; }
.resource-card h3 { font-size: 18px; font-weight: 600; margin-bottom: 8px; }
.resource-card p { font-size: 14px; color: var(--ink-soft); }
.article-body { max-width: 680px; margin: 0 auto; padding: 0 8px; }
.article-body h2 { font-size: 24px; font-weight: 600; margin: 40px 0 16px; letter-spacing: -0.01em; line-height: 1.3; }
.article-body p { font-size: 16px; color: var(--ink-soft); margin-bottom: 18px; line-height: 1.75; }
.article-body ul { margin: 0 0 24px; padding-left: 22px; }
.article-body li { font-size: 16px; color: var(--ink-soft); margin-bottom: 12px; line-height: 1.65; }
.article-lead { font-size: 19px; color: var(--ink); margin-bottom: 32px; line-height: 1.6; padding-bottom: 28px; border-bottom: 1px solid var(--line); }

/* ============================================
   Blog-style article layout (signature: scroll-tracking sidebar TOC)
   ============================================ */
.article-meta-row {
  display: flex;
  align-items: center;
  gap: 14px;
  justify-content: center;
  margin-top: 18px;
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--ink-soft);
}
.article-author { display: flex; align-items: center; gap: 8px; }
.author-avatar {
  width: 26px; height: 26px;
  border-radius: 50%;
  background: var(--blue-pale);
  border: 1px solid #29406B;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 600;
  color: var(--blue-deep);
}
.meta-dot { color: var(--line); }

.article-layout { display: grid; grid-template-columns: 200px 1fr; gap: 56px; align-items: start; }
.article-toc { position: sticky; top: 96px; font-size: 13px; }
.toc-label {
  font-family: var(--mono);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 14px;
}
.toc-link {
  display: block;
  padding: 7px 0 7px 14px;
  border-left: 2px solid var(--line);
  color: var(--ink-soft);
  font-weight: 500;
  line-height: 1.4;
  transition: all 0.15s;
}
.toc-link:hover { color: var(--ink); }
.toc-link.active { border-left-color: var(--blue); color: var(--blue-deep); }

.article-content { max-width: 640px; }
.article-content .article-lead { font-size: 21px; font-family: var(--serif); font-style: italic; color: var(--ink); border-bottom: none; padding-bottom: 0; margin-bottom: 8px; line-height: 1.55; }
.article-content h2 {
  font-family: var(--serif);
  font-size: 28px;
  font-weight: 600;
  margin: 48px 0 18px;
  letter-spacing: -0.005em;
  line-height: 1.25;
  scroll-margin-top: 100px;
  color: var(--ink);
}
.article-content p { font-size: 17px; line-height: 1.8; color: var(--ink-soft); }
.article-content li { font-size: 17px; line-height: 1.7; color: var(--ink-soft); }

.pull-quote {
  font-family: var(--serif);
  font-size: 24px;
  font-style: italic;
  line-height: 1.45;
  color: var(--ink);
  border-left: 3px solid var(--blue);
  padding: 4px 0 4px 24px;
  margin: 40px 0;
}

.article-end-divider { height: 1px; background: var(--line); margin: 56px 0 40px; }
.article-share-row { display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; }
.article-tag {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--blue-deep);
  background: var(--blue-pale);
  border: 1px solid #29406B;
  padding: 4px 10px;
  border-radius: 2px;
}

@media (max-width: 880px) {
  .article-layout { grid-template-columns: 1fr; }
  .article-toc { display: none; }
  .article-content { max-width: 100%; }
}
@media (max-width: 880px) {
  .hero-grid { grid-template-columns: 1fr; gap: 48px; }
  .hero-visual { display: none; }
  .hero h1 { font-size: 38px; }
  .problem-block { grid-template-columns: 1fr; gap: 36px; }
  .steps-row { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
  .timeline-strip { grid-template-columns: 1fr; }
  .timeline-cell { border-right: none; border-bottom: 1px solid var(--line); }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .included-grid { grid-template-columns: 1fr; }
  .tier-row { grid-template-columns: repeat(2, 1fr); gap: 8px; }
  .main-nav { display: none; }
  .step-detail { grid-template-columns: 1fr; gap: 14px; }
  .calc-panel { padding: 24px 20px; }
}