:root {
  --primary: #0b1f33;
  --secondary: #1f3a5f;
  --accent: #3b82f6;
  --bg: #ffffff;
  --bg-soft: #f8fafc;
  --bg-alt: #f1f5f9;
  --text: #111827;
  --text-soft: #6b7280;
  --line: #e5e7eb;
  --card: #ffffff;
  --radius: 20px;
  --shadow: 0 18px 40px rgba(11, 31, 51, 0.08);
  --container: min(1180px, calc(100% - 2rem));
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
.container { width: var(--container); margin: 0 auto; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(229,231,235,0.85);
}
.header-inner {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.brand-wrap { display: flex; align-items: center; gap: 0.9rem; }
.brand-mark {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: grid;
  place-items: center;
  color: #fff;
  font-weight: 800;
  letter-spacing: -0.04em;
  box-shadow: var(--shadow);
}
.brand-name { font-size: 1.1rem; font-weight: 800; letter-spacing: -0.03em; }
.brand-tag { color: var(--text-soft); font-size: 0.9rem; }
.nav-wrap { display: flex; align-items: center; gap: 1rem; }
.menu-toggle {
  display: none;
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--primary);
  border-radius: 12px;
  padding: 0.75rem 1rem;
  font: inherit;
  font-weight: 700;
}
.main-nav { display: flex; align-items: center; gap: 1.1rem; }
.main-nav a {
  color: var(--text-soft);
  font-weight: 600;
}
.main-nav a:hover, .main-nav a.active { color: var(--primary); }
.nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.1rem;
  border-radius: 999px;
  background: var(--secondary);
  color: #fff;
  font-weight: 700;
}
.hero {
  background:
    radial-gradient(circle at top left, rgba(59,130,246,0.08), transparent 30%),
    linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
  padding: 4.5rem 0 3rem;
}
.hero-grid, .two-col, .footer-grid, .split-hero, .product-grid, .category-grid, .contact-grid {
  display: grid;
  gap: 1.5rem;
}
.hero-grid { grid-template-columns: 1.2fr 0.8fr; align-items: center; }
.hero h1, .page-hero h1 { font-size: clamp(2.7rem, 5vw, 4.8rem); line-height: 1.02; letter-spacing: -0.05em; margin: 0 0 1rem; }
.eyebrow, .section-label {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.78rem;
  font-weight: 800;
  color: var(--secondary);
  margin-bottom: 0.8rem;
}
.lead {
  color: var(--text-soft);
  font-size: 1.1rem;
  max-width: 60ch;
}
.hero-actions, .inline-actions { display: flex; gap: 1rem; flex-wrap: wrap; margin-top: 1.6rem; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 0.95rem 1.2rem;
  font-weight: 700;
  transition: 0.2s ease;
}
.btn-primary { background: var(--secondary); color: #fff; }
.btn-primary:hover { background: var(--primary); transform: translateY(-1px); }
.btn-secondary { border: 1px solid var(--line); background: #fff; color: var(--primary); }
.btn-secondary:hover { border-color: var(--secondary); color: var(--secondary); }
.btn-light { background: #fff; color: var(--primary); }
.feature-inline {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  list-style: none;
  padding: 0;
  margin: 1.3rem 0 0;
}
.feature-inline li {
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.8);
  padding: 0.5rem 0.8rem;
  border-radius: 999px;
  color: var(--text-soft);
  font-size: 0.95rem;
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.5rem;
}
.metric-grid, .cards-3, .cards-4, .article-grid {
  display: grid;
  gap: 1rem;
}
.metric-grid { grid-template-columns: repeat(3, 1fr); margin-top: 1.5rem; }
.metric-value { font-size: 2rem; font-weight: 800; color: var(--primary); letter-spacing: -0.04em; }
.metric-label { color: var(--text-soft); font-size: 0.95rem; }
.section { padding: 4.5rem 0; }
.section.alt { background: var(--bg-alt); }
.section h2 { font-size: clamp(2rem, 3vw, 2.8rem); line-height: 1.08; letter-spacing: -0.04em; margin: 0 0 1rem; }
.section-intro { max-width: 68ch; color: var(--text-soft); margin-bottom: 1.5rem; }
.cards-3 { grid-template-columns: repeat(3, 1fr); }
.cards-4 { grid-template-columns: repeat(4, 1fr); }
.card h3 { margin: 0 0 0.7rem; font-size: 1.15rem; letter-spacing: -0.03em; }
.card p, .card li { color: var(--text-soft); }
.check-list, .simple-list, .footer-list { padding-left: 1.1rem; margin: 0.8rem 0 0; }
.kicker { color: var(--secondary); font-weight: 700; font-size: 0.95rem; }
.page-hero {
  padding: 3.5rem 0 2rem;
  background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
}
.page-hero .lead { max-width: 72ch; }
.breadcrumbs {
  color: var(--text-soft);
  font-size: 0.94rem;
  margin-bottom: 1rem;
}
.highlight-box {
  border-left: 4px solid var(--accent);
  background: #eff6ff;
  padding: 1rem 1.1rem;
  border-radius: 0 14px 14px 0;
  color: var(--text);
}
.cta-band {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  padding: 3rem 0;
}
.cta-band .two-col { grid-template-columns: 1.2fr 0.8fr; align-items: center; }
.cta-band p { color: rgba(255,255,255,0.86); }
.newsletter-form, .contact-form {
  display: grid;
  gap: 1rem;
}
.newsletter-form label, .contact-form label { display: grid; gap: 0.45rem; }
input, textarea, select {
  width: 100%;
  padding: 0.95rem 1rem;
  border-radius: 14px;
  border: 1px solid #cbd5e1;
  font: inherit;
  color: var(--text);
  background: #fff;
}
textarea { min-height: 150px; resize: vertical; }
.form-note, .small { color: var(--text-soft); font-size: 0.92rem; }
.checkbox-inline {
  display: grid;
  grid-template-columns: 20px 1fr;
  gap: 0.7rem;
  align-items: start;
}
.checkbox-inline input { margin-top: 0.2rem; }
.article-grid { grid-template-columns: 1fr 320px; align-items: start; }
.article-content {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 2rem;
}
.article-content h2 {
  font-size: clamp(1.6rem, 2.3vw, 2.1rem);
  margin-top: 2rem;
}
.article-content h3 { margin-top: 1.4rem; }
.article-content p, .article-content li { color: #334155; }
.article-aside {
  position: sticky;
  top: 96px;
}
.category-grid { grid-template-columns: repeat(3, 1fr); }
.post-card {
  display: block;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.3rem;
  box-shadow: var(--shadow);
}
.post-card:hover { transform: translateY(-2px); }
.post-meta {
  color: var(--text-soft);
  font-size: 0.9rem;
  margin-bottom: 0.6rem;
}
.quote-box {
  font-size: 1.05rem;
  color: var(--text);
  border-left: 4px solid var(--secondary);
  padding-left: 1rem;
  margin: 1.3rem 0;
}
.contact-grid { grid-template-columns: 0.8fr 1.2fr; }
.footer-grid { grid-template-columns: 1.2fr 0.8fr 0.8fr; }
.site-footer {
  background: var(--primary);
  color: #fff;
  padding: 2.5rem 0 3rem;
}
.site-footer p, .site-footer li, .site-footer a { color: rgba(255,255,255,0.78); }
.site-footer strong { display: block; margin-bottom: 0.75rem; }
.tag-row { display: flex; flex-wrap: wrap; gap: 0.6rem; margin-top: 1rem; }
.tag {
  padding: 0.45rem 0.75rem;
  border-radius: 999px;
  background: var(--bg-alt);
  color: var(--secondary);
  font-weight: 700;
  font-size: 0.88rem;
}
.notice {
  background: #fff7ed;
  color: #9a3412;
  border: 1px solid #fdba74;
  border-radius: 14px;
  padding: 1rem;
}
.table-wrap { overflow-x: auto; }
table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1rem;
  background: #fff;
}
th, td {
  border: 1px solid var(--line);
  padding: 0.9rem;
  text-align: left;
}
th { background: var(--bg-alt); }
@media (max-width: 980px) {
  .hero-grid, .two-col, .footer-grid, .product-grid, .contact-grid, .category-grid, .cards-3, .cards-4, .metric-grid, .article-grid, .cta-band .two-col {
    grid-template-columns: 1fr;
  }
  .article-aside { position: static; }
  .menu-toggle { display: inline-flex; }
  .nav-wrap { position: relative; }
  .main-nav {
    position: absolute;
    top: calc(100% + 0.7rem);
    right: 0;
    width: min(320px, calc(100vw - 2rem));
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 18px;
    box-shadow: var(--shadow);
    padding: 1rem;
    flex-direction: column;
    align-items: stretch;
    display: none;
  }
  .main-nav.is-open { display: flex; }
  .nav-cta { width: 100%; }
}