/* Duta CNG — minimalist clean stylesheet, primary color white */

:root {
  --bg: #ffffff;
  --bg-soft: #f6f8fa;
  --bg-soft-2: #eef2f6;
  --text: #12161c;
  --text-muted: #5b6472;
  --border: #e6e9ee;
  --accent: #1657c2;
  --accent-dark: #0e3f8f;
  --accent-soft: #eaf1fd;
  --accent-contrast: #ffffff;
  --success: #1a7f4e;
  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 20px;
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.04), 0 1px 3px rgba(16, 24, 40, 0.06);
  --shadow-md: 0 4px 12px rgba(16, 24, 40, 0.06), 0 2px 4px rgba(16, 24, 40, 0.04);
  --max-w: 1160px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Skip link ---------- */
.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--accent);
  color: #fff;
  padding: 10px 16px;
  border-radius: 0 0 8px 0;
  z-index: 999;
}
.skip-link:focus { left: 0; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  max-width: var(--max-w);
  margin: 0 auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
  color: var(--text);
}

.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 800;
  font-size: 0.85rem;
}

.brand-sub {
  display: block;
  font-size: 0.68rem;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color 0.15s ease;
}
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--text); }

.nav-cta {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  content: "";
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text);
  position: relative;
  transition: transform 0.2s ease;
}
.nav-toggle span::before { position: absolute; top: -6px; }
.nav-toggle span::after { position: absolute; top: 6px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.12s ease, box-shadow 0.12s ease, background 0.15s ease, color 0.15s ease;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: var(--shadow);
}
.btn-primary:hover { background: var(--accent-dark); }

.btn-secondary {
  background: #fff;
  color: var(--text);
  border-color: var(--border);
}
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); }

.btn-whatsapp {
  background: #ffffff;
  color: var(--success);
  border-color: #cfe9db;
}
.btn-whatsapp:hover { background: #f1faf5; }

.btn-block { width: 100%; }
.btn-sm { padding: 9px 16px; font-size: 0.85rem; }

/* ---------- Hero ---------- */
.hero {
  padding: 88px 0 64px;
  background:
    radial-gradient(60% 60% at 85% 10%, var(--accent-soft) 0%, rgba(234,241,253,0) 70%),
    var(--bg);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent-soft);
  color: var(--accent-dark);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 7px 14px;
  border-radius: 999px;
  margin-bottom: 20px;
}

.hero h1 {
  font-size: clamp(2rem, 3.6vw, 2.9rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 18px;
}

.hero h1 .accent-text { color: var(--accent); }

.hero-lead {
  font-size: 1.08rem;
  color: var(--text-muted);
  max-width: 54ch;
  margin: 0 0 30px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 34px;
}

.hero-trust {
  display: flex;
  gap: 28px;
  flex-wrap: wrap;
}

.trust-item {
  display: flex;
  flex-direction: column;
}
.trust-item strong { font-size: 1.4rem; letter-spacing: -0.01em; }
.trust-item span { font-size: 0.82rem; color: var(--text-muted); }

.hero-panel {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
}

.hero-panel h3 {
  margin: 0 0 6px;
  font-size: 1.05rem;
}
.hero-panel p.panel-sub {
  margin: 0 0 18px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.checklist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.checklist li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.92rem;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
}
.checklist .dot {
  flex: 0 0 auto;
  width: 20px;
  height: 20px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.72rem;
  font-weight: 800;
  margin-top: 1px;
}

/* ---------- Sections ---------- */
section { padding: 72px 0; }
.section-soft { background: var(--bg-soft); }
.section-border-top { border-top: 1px solid var(--border); }

.section-head {
  max-width: 680px;
  margin: 0 0 44px;
}
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }

.kicker {
  color: var(--accent);
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin: 0 0 10px;
}

.section-head h2 {
  font-size: clamp(1.6rem, 2.6vw, 2.1rem);
  letter-spacing: -0.01em;
  margin: 0 0 14px;
}

.section-head p { color: var(--text-muted); font-size: 1.02rem; margin: 0; }

/* ---------- Licensing / COI explainer ---------- */
.license-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 40px;
}

.license-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  box-shadow: var(--shadow);
}
.license-card .icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--accent-soft);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  margin-bottom: 16px;
}
.license-card h3 { margin: 0 0 8px; font-size: 1.05rem; }
.license-card p { margin: 0; color: var(--text-muted); font-size: 0.92rem; }

.coi-panel {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
}
.coi-panel h3 { margin-top: 0; font-size: 1.3rem; }
.coi-panel ol {
  margin: 0;
  padding-left: 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.coi-panel ol li { padding-left: 4px; }
.coi-panel ol li strong { display: block; margin-bottom: 2px; }
.coi-panel ol li span { color: var(--text-muted); font-size: 0.9rem; }

/* ---------- Advantage / why us ---------- */
.advantage-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 18px;
}
.advantage-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: box-shadow 0.15s ease, transform 0.15s ease;
}
.advantage-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.advantage-card .num {
  font-size: 0.78rem;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: 0.04em;
  margin-bottom: 10px;
}
.advantage-card h3 { margin: 0 0 8px; font-size: 1.02rem; }
.advantage-card p { margin: 0; color: var(--text-muted); font-size: 0.9rem; }

/* ---------- Services (GTM, PRS, Cradle) ---------- */
.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.service-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #fff;
  display: flex;
  flex-direction: column;
}
.service-media {
  height: 132px;
  background: linear-gradient(135deg, var(--accent-soft), #fff 70%);
  display: flex;
  align-items: center;
  justify-content: center;
}
.service-media .service-glyph {
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent);
}
.service-body { padding: 22px; display: flex; flex-direction: column; gap: 12px; flex: 1; }
.service-body h3 { margin: 0; font-size: 1.08rem; }
.service-body p { margin: 0; color: var(--text-muted); font-size: 0.9rem; }
.service-specs {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.85rem;
}
.service-specs li { display: flex; justify-content: space-between; gap: 8px; border-top: 1px dashed var(--border); padding-top: 6px; }
.service-specs li span:first-child { color: var(--text-muted); }
.service-specs li span:last-child { font-weight: 600; text-align: right; }

/* ---------- Process steps ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.step {
  position: relative;
  padding: 24px 20px 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #fff;
}
.step .step-num {
  width: 32px;
  height: 32px;
  border-radius: 999px;
  background: var(--text);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
  margin-bottom: 14px;
}
.step h3 { margin: 0 0 6px; font-size: 0.98rem; }
.step p { margin: 0; color: var(--text-muted); font-size: 0.86rem; }

/* ---------- FAQ ---------- */
.faq-list { display: flex; flex-direction: column; gap: 10px; max-width: 820px; margin: 0 auto; }
.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #fff;
  overflow: hidden;
}
.faq-item summary {
  cursor: pointer;
  list-style: none;
  padding: 18px 22px;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  font-size: 1.3rem;
  color: var(--accent);
  flex: 0 0 auto;
}
.faq-item[open] summary::after { content: "\2212"; }
.faq-item .faq-a {
  padding: 0 22px 20px;
  color: var(--text-muted);
  font-size: 0.94rem;
}

/* ---------- CTA band ---------- */
.cta-band {
  background: linear-gradient(135deg, var(--accent-dark), var(--accent));
  border-radius: var(--radius-lg);
  padding: 48px;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.cta-band h2 { margin: 0 0 8px; font-size: 1.6rem; letter-spacing: -0.01em; }
.cta-band p { margin: 0; color: rgba(255,255,255,0.85); max-width: 46ch; }
.cta-band .btn-secondary { background: #fff; color: var(--accent-dark); border-color: transparent; }
.cta-band .btn-secondary:hover { background: #f3f6ff; }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 56px 0 28px;
  background: var(--bg-soft);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 40px;
}
.footer-col h4 { margin: 0 0 16px; font-size: 0.92rem; }
.footer-col p { color: var(--text-muted); font-size: 0.88rem; margin: 0 0 14px; }
.footer-col ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.footer-col ul a { color: var(--text-muted); font-size: 0.9rem; }
.footer-col ul a:hover { color: var(--accent); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 22px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ---------- Contact page ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 40px;
  align-items: start;
}
.contact-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  background: #fff;
  margin-bottom: 18px;
}
.contact-card h3 { margin: 0 0 6px; font-size: 1rem; }
.contact-card p { margin: 0; color: var(--text-muted); font-size: 0.92rem; }
.contact-card a.contact-value {
  display: inline-block;
  margin-top: 8px;
  font-weight: 600;
  color: var(--accent);
}

.form-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  background: #fff;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 16px; }
.field label { font-size: 0.85rem; font-weight: 600; }
.field input, .field select, .field textarea {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  font-family: inherit;
  font-size: 0.94rem;
  background: var(--bg-soft);
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none;
  border-color: var(--accent);
  background: #fff;
}
.field textarea { resize: vertical; min-height: 110px; }
.form-note { font-size: 0.82rem; color: var(--text-muted); margin-top: 10px; }

.map-embed {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-top: 18px;
  height: 260px;
  background: var(--bg-soft-2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.9rem;
  text-align: center;
  padding: 20px;
}

/* ---------- Page hero (secondary pages) ---------- */
.page-hero {
  padding: 56px 0 40px;
  background: var(--bg-soft);
  border-bottom: 1px solid var(--border);
}
.breadcrumbs { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 14px; }
.breadcrumbs a { color: var(--text-muted); }
.breadcrumbs a:hover { color: var(--accent); }
.page-hero h1 { font-size: clamp(1.7rem, 3vw, 2.3rem); margin: 0 0 12px; letter-spacing: -0.01em; }
.page-hero p { color: var(--text-muted); max-width: 62ch; margin: 0; font-size: 1.02rem; }

/* ---------- Articles listing ---------- */
.article-filter {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}
.filter-chip {
  border: 1px solid var(--border);
  background: #fff;
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
}
.filter-chip.is-active, .filter-chip:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }

.article-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.article-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: #fff;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow 0.15s ease, transform 0.15s ease;
}
.article-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.article-thumb {
  height: 150px;
  background: linear-gradient(135deg, var(--accent-soft), #fff);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-weight: 800;
  font-size: 1.6rem;
}
.article-body { padding: 20px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.article-meta { font-size: 0.78rem; color: var(--text-muted); display: flex; gap: 10px; align-items: center; }
.article-tag {
  background: var(--accent-soft);
  color: var(--accent-dark);
  padding: 3px 10px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.article-body h3 { margin: 0; font-size: 1.05rem; line-height: 1.35; }
.article-body p { margin: 0; color: var(--text-muted); font-size: 0.9rem; flex: 1; }
.article-readmore { font-weight: 700; color: var(--accent); font-size: 0.88rem; margin-top: 6px; }

.pagination { display: flex; justify-content: center; gap: 8px; margin-top: 40px; }
.pagination button, .pagination a {
  border: 1px solid var(--border);
  background: #fff;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.88rem;
  cursor: pointer;
}
.pagination .is-active { background: var(--accent); color: #fff; border-color: var(--accent); }

/* ---------- Article detail (template) ---------- */
.article-detail-hero { padding: 48px 0 32px; border-bottom: 1px solid var(--border); }
.article-detail-hero .article-meta { margin-bottom: 16px; }
.article-detail-hero h1 { font-size: clamp(1.7rem, 3.2vw, 2.4rem); letter-spacing: -0.01em; margin: 0 0 18px; }
.article-detail-hero .article-excerpt { color: var(--text-muted); font-size: 1.08rem; max-width: 72ch; }
.article-author-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 24px;
  font-size: 0.88rem;
  color: var(--text-muted);
}
.author-avatar {
  width: 38px; height: 38px; border-radius: 999px;
  background: var(--accent-soft); color: var(--accent);
  display: flex; align-items: center; justify-content: center; font-weight: 800; font-size: 0.85rem;
}

.article-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 48px;
  padding: 48px 0 72px;
}
.article-content h2 { font-size: 1.4rem; margin: 40px 0 14px; letter-spacing: -0.01em; }
.article-content h3 { font-size: 1.15rem; margin: 28px 0 10px; }
.article-content p { margin: 0 0 16px; color: var(--text); font-size: 1rem; }
.article-content ul, .article-content ol { margin: 0 0 16px; padding-left: 22px; color: var(--text); }
.article-content li { margin-bottom: 8px; }
.article-content blockquote {
  margin: 24px 0;
  padding: 18px 22px;
  border-left: 3px solid var(--accent);
  background: var(--bg-soft);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-muted);
  font-style: italic;
}
.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 0.92rem;
}
.article-content th, .article-content td {
  border: 1px solid var(--border);
  padding: 10px 12px;
  text-align: left;
}
.article-content th { background: var(--bg-soft); }

.article-tags { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 32px; }
.article-tags span {
  background: var(--bg-soft); border: 1px solid var(--border);
  padding: 5px 12px; border-radius: 999px; font-size: 0.8rem; color: var(--text-muted);
}

.article-sidebar { display: flex; flex-direction: column; gap: 22px; }
.sidebar-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  background: #fff;
}
.sidebar-card h4 { margin: 0 0 14px; font-size: 0.95rem; }
.sidebar-related { display: flex; flex-direction: column; gap: 12px; }
.sidebar-related a { font-size: 0.88rem; font-weight: 600; color: var(--text); }
.sidebar-related a:hover { color: var(--accent); }

.not-found { text-align: center; padding: 80px 0; }

/* ---------- Utilities ---------- */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.visually-hidden {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}

/* ---------- Floating WhatsApp button ---------- */
.whatsapp-float {
  position: fixed;
  right: 22px;
  bottom: 22px;
  width: 58px;
  height: 58px;
  border-radius: 999px;
  background: #25D366;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 20px rgba(37, 211, 102, 0.4), 0 2px 6px rgba(16, 24, 40, 0.15);
  z-index: 60;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.whatsapp-float:hover {
  transform: translateY(-2px) scale(1.04);
  box-shadow: 0 10px 26px rgba(37, 211, 102, 0.5), 0 4px 10px rgba(16, 24, 40, 0.18);
}

@media (max-width: 680px) {
  .whatsapp-float {
    width: 52px;
    height: 52px;
    right: 16px;
    bottom: 16px;
  }
}

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; }
  .coi-panel { grid-template-columns: 1fr; }
  .license-grid { grid-template-columns: repeat(2, 1fr); }
  .advantage-grid { grid-template-columns: repeat(2, 1fr); }
  .service-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .article-grid { grid-template-columns: repeat(2, 1fr); }
  .article-layout { grid-template-columns: 1fr; }
}

@media (max-width: 680px) {
  /* --- Mobile Header --- */
  .brand-mark { display: none; }
  .brand-sub { display: none; }
  .brand { font-size: 1rem; gap: 0; }
  .nav { padding: 12px 16px; }
  .nav-cta .btn-primary {
    padding: 8px 14px;
    font-size: 0.82rem;
    border-radius: 999px;
  }
  .nav-cta .btn-secondary { display: none; }
  .nav-links { display: none; }
  .nav-toggle { display: flex; width: 36px; height: 36px; }
  .nav-cta { gap: 8px; }
  
  .nav.is-open .nav-links {
    display: flex;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 16px 24px 24px;
    gap: 16px;
  }
  .advantage-grid { grid-template-columns: repeat(2, 1fr); }
  .license-grid, .service-grid, .steps, .footer-grid, .article-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .cta-band { flex-direction: column; text-align: center; }
  .hero { padding: 56px 0 40px; }
  section { padding: 52px 0; }
}