/* =========================================================
   CRS Scientific — Design System
   ========================================================= */

:root {
  --color-bg: #ffffff;
  --color-bg-soft: #f5f8fc;
  --color-bg-dark: #0b1c34;
  --color-bg-darker: #061427;
  --color-ink: #0c1b2f;
  --color-ink-soft: #41546e;
  --color-ink-muted: #708096;
  --color-line: #e2e8f0;
  --color-accent: #0a5cd6;
  --color-accent-hover: #0848a8;
  --color-accent-soft: #e7f0ff;
  --color-accent-strong: #073b8c;
  --color-cyan: #4ea4ff;

  --shadow-sm: 0 1px 2px rgba(11, 28, 52, 0.06);
  --shadow-md: 0 6px 24px -8px rgba(11, 28, 52, 0.12);
  --shadow-lg: 0 16px 48px -12px rgba(11, 28, 52, 0.18);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --container-max: 1200px;
  --gutter: 24px;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-ink);
  background: var(--color-bg);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color 0.18s ease;
}

a:hover { color: var(--color-accent-hover); }

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

/* =========================================================
   Typography
   ========================================================= */

h1, h2, h3, h4 {
  margin: 0 0 0.5em;
  color: var(--color-ink);
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 1.2;
}

h1 { font-size: clamp(2.2rem, 5vw, 3.4rem); font-weight: 800; letter-spacing: -0.025em; }
h2 { font-size: clamp(1.6rem, 3.2vw, 2.3rem); }
h3 { font-size: 1.2rem; }
h4 { font-size: 1rem; }

p { margin: 0 0 1em; color: var(--color-ink-soft); }

.lead {
  font-size: 1.15rem;
  color: var(--color-ink-soft);
  max-width: 640px;
  line-height: 1.65;
}

.eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 1em;
}

.eyebrow.light { color: var(--color-cyan); }

/* =========================================================
   Buttons
   ========================================================= */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.4rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.18s ease;
  text-decoration: none;
  white-space: nowrap;
  font-family: inherit;
}

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

.btn-primary:hover {
  background: var(--color-accent-hover);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-ghost {
  background: transparent;
  color: var(--color-ink);
  border-color: var(--color-line);
}

.btn-ghost:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.btn-light {
  background: #fff;
  color: var(--color-accent);
}

.btn-light:hover {
  background: var(--color-bg-soft);
  color: var(--color-accent-hover);
}

.btn-large { padding: 0.95rem 1.7rem; font-size: 1rem; }

/* =========================================================
   Header / Navigation
   ========================================================= */

.site-header {
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  z-index: 100;
  border-bottom: 1px solid transparent;
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.site-header.scrolled {
  border-bottom-color: var(--color-line);
  box-shadow: var(--shadow-sm);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem var(--gutter);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 800;
  color: var(--color-ink);
  font-size: 1.15rem;
  text-decoration: none;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-strong) 100%);
  color: #fff;
  font-weight: 800;
  font-size: 0.85rem;
  letter-spacing: 0.04em;
}

.brand-text {
  color: var(--color-ink);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.primary-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.primary-nav a {
  color: var(--color-ink-soft);
  font-weight: 500;
  font-size: 0.95rem;
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-sm);
  transition: color 0.18s ease, background 0.18s ease;
}

.primary-nav a:hover { color: var(--color-accent); background: var(--color-accent-soft); }

.primary-nav a.active { color: var(--color-accent); }

.primary-nav .nav-cta {
  background: var(--color-accent);
  color: #fff;
  margin-left: 0.5rem;
  padding: 0.55rem 1.15rem;
  border-radius: var(--radius-md);
}

.primary-nav .nav-cta:hover { background: var(--color-accent-hover); color: #fff; }

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: none;
  background: transparent;
  cursor: pointer;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  padding: 0;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-ink);
  margin: 0 auto;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

/* =========================================================
   Sections
   ========================================================= */

.section { padding: clamp(64px, 9vw, 110px) 0; }

.section-head {
  max-width: 720px;
  margin: 0 auto 3rem;
  text-align: center;
}

.section-head h2 { margin-bottom: 0.6em; }

.section-head p { font-size: 1.05rem; color: var(--color-ink-soft); }

/* =========================================================
   Hero
   ========================================================= */

.hero {
  position: relative;
  padding: clamp(80px, 12vw, 130px) 0 clamp(60px, 8vw, 90px);
  overflow: hidden;
  background: linear-gradient(180deg, #f7faff 0%, #ffffff 100%);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 0%, rgba(10, 92, 214, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 90% 30%, rgba(78, 164, 255, 0.08) 0%, transparent 50%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 4rem;
  align-items: center;
}

.hero-copy h1 { margin-bottom: 1rem; }

.hero-actions {
  display: flex;
  gap: 1rem;
  margin: 2rem 0 3rem;
  flex-wrap: wrap;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-line);
}

.hero-stats > div {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.hero-stats strong {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-ink);
  letter-spacing: -0.015em;
}

.hero-stats span {
  font-size: 0.85rem;
  color: var(--color-ink-muted);
  line-height: 1.4;
}

.hero-visual {
  display: flex;
  align-items: center;
  justify-content: center;
}

.pump-illustration {
  position: relative;
  width: 360px;
  height: 360px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.pump-illustration .ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(10, 92, 214, 0.15);
}

.pump-illustration .ring-1 {
  width: 100%; height: 100%;
  animation: spin 50s linear infinite;
}
.pump-illustration .ring-2 {
  width: 75%; height: 75%;
  border-style: dashed;
  animation: spin 40s linear infinite reverse;
}
.pump-illustration .ring-3 {
  width: 55%; height: 55%;
  border-color: rgba(78, 164, 255, 0.3);
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.pump-illustration .core {
  position: relative;
  z-index: 1;
  width: 200px;
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  filter: drop-shadow(0 12px 30px rgba(10, 92, 214, 0.25));
}

/* =========================================================
   Trust strip
   ========================================================= */

.trust {
  padding: 3rem 0;
  background: var(--color-bg-soft);
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}

.trust-label {
  text-align: center;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
  margin-bottom: 1.5rem;
}

.trust-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 2.5rem;
}

.trust-grid span {
  font-weight: 600;
  color: var(--color-ink);
  font-size: 1rem;
  opacity: 0.7;
}

/* =========================================================
   Features
   ========================================================= */

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.feature-card {
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.feature-card:hover {
  transform: translateY(-3px);
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
}

.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: var(--color-accent-soft);
  color: var(--color-accent);
  margin-bottom: 1.25rem;
}

.feature-card h3 {
  margin-bottom: 0.5rem;
  font-size: 1.15rem;
}

.feature-card p {
  margin: 0;
  color: var(--color-ink-soft);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* =========================================================
   Product preview cards
   ========================================================= */

.product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}

.product-card {
  display: block;
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  color: var(--color-ink);
  text-decoration: none;
  position: relative;
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.product-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-cyan));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.product-card:hover {
  transform: translateY(-3px);
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
}

.product-card:hover::before { transform: scaleX(1); }

.product-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  background: var(--color-accent-soft);
  padding: 0.25rem 0.6rem;
  border-radius: 4px;
  margin-bottom: 1rem;
}

.product-card h3 { margin-bottom: 0.3rem; font-size: 1.25rem; }

.product-spec {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: 0.75rem;
  font-variant-numeric: tabular-nums;
}

.product-card p {
  font-size: 0.92rem;
  color: var(--color-ink-soft);
  margin-bottom: 1.25rem;
}

.product-link {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-accent);
}

/* =========================================================
   OEM CTA section
   ========================================================= */

.oem-cta {
  background: linear-gradient(135deg, var(--color-bg-dark) 0%, var(--color-bg-darker) 100%);
  color: #fff;
  position: relative;
  overflow: hidden;
}

.oem-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 15% 80%, rgba(78, 164, 255, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 90% 20%, rgba(10, 92, 214, 0.2) 0%, transparent 50%);
  pointer-events: none;
}

.oem-cta .container { position: relative; }

.oem-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 4rem;
  align-items: center;
}

.oem-cta h2, .oem-cta h3 { color: #fff; }

.oem-cta p {
  color: rgba(255, 255, 255, 0.75);
  font-size: 1.05rem;
}

.check-list {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 2rem;
}

.check-list li {
  position: relative;
  padding-left: 1.75rem;
  margin-bottom: 0.65rem;
  color: rgba(255, 255, 255, 0.85);
}

.check-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.45em;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-cyan);
  background-image: linear-gradient(135deg, var(--color-cyan), var(--color-accent));
}

.check-list li::after {
  content: '';
  position: absolute;
  left: 5px;
  top: 0.7em;
  width: 6px;
  height: 3px;
  border-left: 2px solid #fff;
  border-bottom: 2px solid #fff;
  transform: rotate(-45deg);
}

.oem-numbers {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.oem-stat {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: 1.75rem 1.5rem;
}

.oem-stat strong {
  display: block;
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #fff;
  margin-bottom: 0.5rem;
}

.oem-stat span {
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.5;
}

/* =========================================================
   CTA strip
   ========================================================= */

.cta-strip {
  background: var(--color-bg-soft);
}

.cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
  background: #fff;
  border-radius: var(--radius-xl);
  padding: 3rem;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-line);
}

.cta-inner h2 { margin-bottom: 0.5rem; }

.cta-inner p { margin: 0; max-width: 520px; }

/* =========================================================
   Page hero (sub-pages)
   ========================================================= */

.page-hero {
  padding: clamp(70px, 9vw, 110px) 0 clamp(50px, 6vw, 80px);
  background: linear-gradient(180deg, #f7faff 0%, #ffffff 100%);
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 80% 30%, rgba(78, 164, 255, 0.1) 0%, transparent 50%);
  pointer-events: none;
}

.page-hero .container { position: relative; max-width: 900px; }

.page-hero h1 { margin-bottom: 1rem; }

.page-hero.compact { padding: clamp(60px, 7vw, 90px) 0 clamp(40px, 5vw, 60px); }

/* =========================================================
   Product detail rows
   ========================================================= */

.product-detail.alt { background: var(--color-bg-soft); }

.product-row {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3.5rem;
  align-items: center;
}

.product-row.reverse { grid-template-columns: 1.1fr 0.9fr; direction: rtl; }

.product-row.reverse > * { direction: ltr; }

.product-thumb {
  width: 100%;
  aspect-ratio: 1 / 1;
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, #e7f0ff 0%, #cfe1ff 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.product-thumb::before {
  content: '';
  position: absolute;
  inset: 20%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(10, 92, 214, 0.15) 0%, transparent 70%);
}

.product-thumb::after {
  content: '';
  position: absolute;
  width: 60%; height: 60%;
  border: 2px solid rgba(10, 92, 214, 0.2);
  border-radius: 50%;
  border-top-color: var(--color-accent);
  animation: spin 12s linear infinite;
}

.thumb-label {
  position: relative;
  z-index: 2;
  font-size: 2.4rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--color-accent-strong);
  background: rgba(255, 255, 255, 0.85);
  padding: 0.5rem 1.5rem;
  border-radius: 100px;
  box-shadow: var(--shadow-sm);
}

.thumb-a { background: linear-gradient(135deg, #e7f0ff 0%, #cfe1ff 100%); }
.thumb-p { background: linear-gradient(135deg, #fff4e6 0%, #ffe2b8 100%); }
.thumb-b { background: linear-gradient(135deg, #e6f7ee 0%, #c7ecd5 100%); }
.thumb-l { background: linear-gradient(135deg, #f0e6ff 0%, #d8c7f0 100%); }

/* Real product photo variant — hide the decorative rings/label, show the image */
.product-thumb-photo::before,
.product-thumb-photo::after { display: none; }

.product-thumb-photo {
  padding: 2.5%;
  background: linear-gradient(160deg, #f7faff 0%, #e7f0ff 100%);
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
}

.product-thumb-photo img {
  position: relative;
  z-index: 2;
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter: drop-shadow(0 14px 28px rgba(11, 28, 52, 0.14));
  /* Download deterrents */
  user-select: none;
  -webkit-user-select: none;
  -webkit-user-drag: none;
  -khtml-user-drag: none;
  -moz-user-drag: none;
  -o-user-drag: none;
  user-drag: none;
  pointer-events: none;
  -webkit-touch-callout: none;
}

.product-row-copy h2 { margin-bottom: 1rem; }

.spec-table {
  margin: 1.5rem 0;
  border-top: 1px solid var(--color-line);
}

.spec-row {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--color-line);
  font-size: 0.95rem;
}

.spec-row span {
  color: var(--color-ink-muted);
}

.spec-row strong {
  color: var(--color-ink);
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.product-applications {
  background: var(--color-accent-soft);
  border-left: 3px solid var(--color-accent);
  padding: 1rem 1.25rem;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-size: 0.95rem;
  color: var(--color-ink);
  margin-top: 1.5rem;
}

/* Model variant sub-cards (within a series detail section) */
.model-variants { margin: 1.75rem 0 0.5rem; }

.model-variants-title {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
  margin-bottom: 0.85rem;
}

.model-variants-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.85rem;
}

.model-card {
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 1.1rem 1.15rem;
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

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

.model-card.highlighted {
  border-color: var(--color-accent);
  background: linear-gradient(180deg, var(--color-accent-soft) 0%, #ffffff 60%);
}

.model-card strong {
  display: block;
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-ink);
  letter-spacing: -0.01em;
  margin-bottom: 0.25rem;
}

.model-card .model-spec {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-accent);
  font-variant-numeric: tabular-nums;
  margin: 0 0 0.55rem;
}

.model-card p:not(.model-spec) {
  font-size: 0.85rem;
  color: var(--color-ink-soft);
  margin: 0;
  line-height: 1.5;
}

.models-badge {
  display: inline-block;
  margin-left: 0.4rem;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-accent);
  background: var(--color-accent-soft);
  padding: 0.12rem 0.45rem;
  border-radius: 4px;
  vertical-align: middle;
}

@media (max-width: 720px) {
  .model-variants-grid { grid-template-columns: 1fr; }
}

/* =========================================================
   Compare table
   ========================================================= */

.compare-section { background: var(--color-bg-soft); }

.compare-table-wrap {
  overflow-x: auto;
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-line);
}

.compare-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

.compare-table th, .compare-table td {
  padding: 1rem 1.25rem;
  text-align: left;
  border-bottom: 1px solid var(--color-line);
}

.compare-table th {
  background: var(--color-bg-soft);
  font-weight: 600;
  color: var(--color-ink);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

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

.compare-table tbody tr:hover { background: rgba(231, 240, 255, 0.4); }

/* =========================================================
   Applications grid
   ========================================================= */

.apps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.app-card {
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.app-card:hover {
  transform: translateY(-3px);
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
}

.app-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--color-accent-soft) 0%, #d4e6ff 100%);
  color: var(--color-accent);
  margin-bottom: 1.25rem;
}

.app-card h3 { margin-bottom: 0.6rem; font-size: 1.2rem; }

.app-card p {
  font-size: 0.95rem;
  color: var(--color-ink-soft);
  margin-bottom: 1rem;
}

.app-bullets {
  list-style: none;
  padding: 0;
  margin: 0;
  border-top: 1px solid var(--color-line);
  padding-top: 1rem;
}

.app-bullets li {
  font-size: 0.88rem;
  color: var(--color-ink-soft);
  padding: 0.3rem 0;
  padding-left: 1.25rem;
  position: relative;
}

.app-bullets li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: 700;
}

/* =========================================================
   OEM page — pillars
   ========================================================= */

.pillar-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}

.pillar-card {
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.pillar-card:hover { border-color: var(--color-accent); transform: translateY(-3px); }

.pillar-num {
  display: inline-block;
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--color-accent);
  margin-bottom: 1rem;
}

.pillar-card h3 { font-size: 1.1rem; margin-bottom: 0.5rem; }

.pillar-card p { font-size: 0.92rem; color: var(--color-ink-soft); margin: 0; }

/* =========================================================
   OEM page — process list
   ========================================================= */

.oem-process { background: var(--color-bg-soft); }

.process-list {
  list-style: none;
  padding: 0;
  margin: 0;
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.process-list li {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 1.5rem;
  align-items: start;
  background: #fff;
  padding: 1.75rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-line);
  box-shadow: var(--shadow-sm);
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-accent);
  color: #fff;
  font-weight: 700;
  font-size: 1.1rem;
}

.process-list h3 { margin-bottom: 0.4rem; }

.process-list p { margin: 0; color: var(--color-ink-soft); }

/* =========================================================
   OEM page — options + FAQ
   ========================================================= */

.options-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}

.option-card {
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
}

.option-card h4 {
  margin-bottom: 1rem;
  font-size: 1rem;
  color: var(--color-accent);
  letter-spacing: 0.02em;
}

.option-card ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.option-card li {
  font-size: 0.9rem;
  color: var(--color-ink-soft);
  padding: 0.45rem 0;
  border-top: 1px solid var(--color-line);
}

.option-card li:first-child { border-top: none; padding-top: 0; }

.oem-faq { background: var(--color-bg-soft); }

.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.faq-list details {
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  transition: border-color 0.18s ease;
}

.faq-list details[open] { border-color: var(--color-accent); }

.faq-list summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--color-ink);
  list-style: none;
  position: relative;
  padding-right: 2rem;
}

.faq-list summary::-webkit-details-marker { display: none; }

.faq-list summary::after {
  content: '+';
  position: absolute;
  right: 0;
  top: 0;
  font-size: 1.4rem;
  color: var(--color-accent);
  font-weight: 400;
  line-height: 1;
  transition: transform 0.2s ease;
}

.faq-list details[open] summary::after { transform: rotate(45deg); }

.faq-list details p {
  margin: 0.85rem 0 0;
  color: var(--color-ink-soft);
  font-size: 0.95rem;
}

/* =========================================================
   About page
   ========================================================= */

.about-grid {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 4rem;
  align-items: start;
}

.about-grid h2 { margin-bottom: 1rem; }

.about-callouts { display: flex; flex-direction: column; gap: 1rem; }

.callout {
  background: var(--color-bg-soft);
  border-left: 3px solid var(--color-accent);
  padding: 1.25rem 1.5rem;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.callout strong {
  display: block;
  color: var(--color-ink);
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.callout span { color: var(--color-ink-soft); font-size: 0.93rem; }

.values { background: var(--color-bg-soft); }

.values-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}

.value-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  border: 1px solid var(--color-line);
}

.value-card h3 { font-size: 1.05rem; margin-bottom: 0.6rem; color: var(--color-accent); }

.value-card p { margin: 0; font-size: 0.93rem; color: var(--color-ink-soft); }

.numbers-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.numbers-grid > div {
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 2rem 1.5rem;
  text-align: center;
}

.numbers-grid strong {
  display: block;
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--color-accent);
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}

.numbers-grid span {
  font-size: 0.9rem;
  color: var(--color-ink-soft);
  line-height: 1.5;
}

.quality { background: var(--color-bg-soft); }

.quality-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.quality-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.quality-list li {
  padding: 1rem 0;
  border-bottom: 1px solid var(--color-line);
  color: var(--color-ink-soft);
}

.quality-list li:first-child { padding-top: 0; }

.quality-list strong { color: var(--color-ink); margin-right: 0.5rem; }

/* =========================================================
   Contact form
   ========================================================= */

.contact-section { padding-top: clamp(20px, 4vw, 40px); }

.contact-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.6fr;
  gap: 4rem;
  align-items: start;
}

.contact-form-wrap {
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-xl);
  padding: 2.5rem;
  box-shadow: var(--shadow-md);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.form-field { display: flex; flex-direction: column; gap: 0.4rem; }

.form-field label {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-ink);
}

.form-field input,
.form-field select,
.form-field textarea {
  font-family: inherit;
  font-size: 0.95rem;
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: #fff;
  color: var(--color-ink);
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
  width: 100%;
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(10, 92, 214, 0.12);
}

.form-field textarea { resize: vertical; }

.checkbox-field { flex-direction: row; align-items: flex-start; }

.checkbox-field label {
  display: flex;
  gap: 0.6rem;
  align-items: flex-start;
  font-weight: 400;
  color: var(--color-ink-soft);
  font-size: 0.9rem;
  cursor: pointer;
}

.checkbox-field input { width: auto; margin-top: 3px; }

.form-note {
  margin: 0;
  font-size: 0.9rem;
  color: var(--color-accent);
}

.contact-aside { display: flex; flex-direction: column; gap: 1.5rem; }

.contact-block {
  background: var(--color-bg-soft);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  border-left: 3px solid var(--color-accent);
}

.contact-block h3 {
  font-size: 0.95rem;
  color: var(--color-ink);
  margin-bottom: 0.35rem;
}

.contact-block p {
  margin: 0 0 0.4rem;
  font-size: 0.88rem;
  color: var(--color-ink-soft);
}

.contact-block a {
  font-weight: 600;
  color: var(--color-accent);
  font-size: 0.95rem;
}

/* =========================================================
   Footer
   ========================================================= */

.site-footer {
  background: var(--color-bg-darker);
  color: rgba(255, 255, 255, 0.7);
  padding: 4rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.brand-footer .brand-text { color: #fff; }

.footer-blurb {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.92rem;
  margin-top: 1rem;
  max-width: 320px;
}

.site-footer h4 {
  color: #fff;
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 600;
  margin-bottom: 1rem;
}

.site-footer ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.site-footer ul li { color: rgba(255, 255, 255, 0.7); font-size: 0.92rem; }

.site-footer a {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.92rem;
  transition: color 0.18s ease;
}

.site-footer a:hover { color: #fff; }

.contact-list li { color: rgba(255, 255, 255, 0.7); }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.5);
  flex-wrap: wrap;
  gap: 1rem;
}

/* =========================================================
   Responsive
   ========================================================= */

@media (max-width: 1024px) {
  .feature-grid,
  .apps-grid,
  .values-grid,
  .numbers-grid { grid-template-columns: repeat(2, 1fr); }
  .product-grid,
  .pillar-grid,
  .options-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-inner { grid-template-columns: 1fr; gap: 3rem; }
  .hero-visual { order: -1; }
  .pump-illustration { width: 260px; height: 260px; }
  .pump-illustration .core { width: 150px; height: 150px; }
  .pump-illustration .core svg { width: 140px; height: 140px; }
  .oem-grid,
  .about-grid,
  .quality-grid,
  .contact-grid { grid-template-columns: 1fr; gap: 3rem; }
  .product-row,
  .product-row.reverse { grid-template-columns: 1fr; gap: 2.5rem; }
  .product-row.reverse { direction: ltr; }
  .product-thumb { max-width: 360px; margin: 0 auto; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
}

@media (max-width: 720px) {
  :root { --gutter: 18px; }

  .primary-nav {
    position: fixed;
    top: 70px;
    left: 0; right: 0;
    background: #fff;
    padding: 1.5rem var(--gutter) 2rem;
    flex-direction: column;
    align-items: stretch;
    gap: 0.25rem;
    border-bottom: 1px solid var(--color-line);
    box-shadow: var(--shadow-md);
    transform: translateY(-110%);
    transition: transform 0.22s ease;
  }

  .primary-nav.open { transform: translateY(0); }

  .primary-nav a {
    padding: 0.85rem 0.5rem;
    border-bottom: 1px solid var(--color-line);
    border-radius: 0;
  }

  .primary-nav a:last-child { border-bottom: none; }

  .primary-nav .nav-cta {
    margin-left: 0;
    margin-top: 0.75rem;
    text-align: center;
    border-radius: var(--radius-md);
  }

  .nav-toggle { display: flex; }

  .feature-grid,
  .apps-grid,
  .values-grid,
  .numbers-grid,
  .product-grid,
  .pillar-grid,
  .options-grid,
  .oem-numbers,
  .form-row,
  .footer-grid { grid-template-columns: 1fr; }

  .hero-stats { grid-template-columns: 1fr 1fr; }

  .hero-stats > div:nth-child(3) { grid-column: span 2; padding-top: 0.5rem; }

  .cta-inner { padding: 2rem; flex-direction: column; align-items: flex-start; }

  .process-list li { grid-template-columns: 1fr; gap: 1rem; padding: 1.5rem; }

  .footer-bottom { flex-direction: column; align-items: flex-start; }

  .compare-table { font-size: 0.85rem; }

  .compare-table th, .compare-table td { padding: 0.75rem 0.85rem; }
}