/* ==========================================================================
   OMA Identification Technologies - Main Stylesheet
   ========================================================================== */

:root {
  --brand: #0b5fff;
  --brand-dark: #0738a3;
  --brand-light: #e8f0ff;
  --accent: #00c2a8;
  --ink: #0d1526;
  --ink-soft: #3c4a63;
  --muted: #6b7a94;
  --line: #e3e9f3;
  --bg-soft: #f5f8fd;
  --white: #ffffff;
  --radius: 14px;
  --radius-lg: 22px;
  --shadow-sm: 0 2px 10px rgba(13, 21, 38, .06);
  --shadow-md: 0 10px 30px rgba(13, 21, 38, .09);
  --shadow-lg: 0 24px 60px rgba(13, 21, 38, .14);
  --container: 1200px;
  --font: "Be Vietnam Pro", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink-soft);
  background: var(--white);
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; border: 0; }

a { color: var(--brand); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--brand-dark); }

h1, h2, h3, h4, h5 {
  color: var(--ink);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -.01em;
  margin: 0 0 .6em;
}

h1 { font-size: clamp(1.9rem, 4.2vw, 3.35rem); }
h2 { font-size: clamp(1.5rem, 2.9vw, 2.35rem); }
h3 { font-size: clamp(1.12rem, 1.6vw, 1.35rem); }
h4 { font-size: 1.05rem; }

p { margin: 0 0 1.1em; }
ul, ol { margin: 0 0 1.1em; padding-left: 1.25em; }
li { margin-bottom: .45em; }

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 22px;
}

.section { padding: 84px 0; }
.section--soft { background: var(--bg-soft); }
.section--tight { padding: 60px 0; }

.section-head { max-width: 780px; margin: 0 auto 52px; text-align: center; }
.section-head.left { margin-left: 0; text-align: left; }
.section-head p { margin-bottom: 0; color: var(--muted); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--brand);
  background: var(--brand-light);
  border-radius: 999px;
  padding: 6px 14px;
  margin-bottom: 18px;
}

.grid { display: grid; gap: 26px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 30px;
  border-radius: 999px;
  font-weight: 700;
  font-size: .96rem;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease, color .18s ease;
  line-height: 1.2;
}
.btn--primary { background: var(--brand); color: #fff; box-shadow: 0 10px 24px rgba(11, 95, 255, .28); }
.btn--primary:hover { background: var(--brand-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 16px 32px rgba(11, 95, 255, .32); }
.btn--ghost { border-color: rgba(255, 255, 255, .65); color: #fff; }
.btn--ghost:hover { background: rgba(255, 255, 255, .14); color: #fff; }
.btn--outline { border-color: var(--line); color: var(--ink); background: #fff; }
.btn--outline:hover { border-color: var(--brand); color: var(--brand); }
.btn--lg { padding: 17px 38px; font-size: 1.02rem; }

/* ---------- Header ---------- */
.topbar {
  background: var(--ink);
  color: rgba(255, 255, 255, .78);
  font-size: .84rem;
}
.topbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 42px;
  flex-wrap: wrap;
}
.topbar a { color: rgba(255, 255, 255, .82); }
.topbar a:hover { color: #fff; }
.topbar__list { display: flex; gap: 22px; flex-wrap: wrap; align-items: center; }
.topbar__list span { display: inline-flex; gap: 8px; align-items: center; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, .96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
  transition: box-shadow .2s ease;
}
.site-header.is-stuck { box-shadow: var(--shadow-sm); }
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 78px;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand img { width: 191px; height: 40px; object-fit: contain; }
.brand__txt { display: none; }

.nav { display: flex; align-items: center; gap: 4px; }
.nav a {
  position: relative;
  padding: 10px 15px;
  color: var(--ink-soft);
  font-weight: 600;
  font-size: .95rem;
  border-radius: 8px;
}
.nav a:hover { color: var(--brand); background: var(--bg-soft); }
.nav a.is-active { color: var(--brand); }
.nav a.is-active::after {
  content: "";
  position: absolute;
  left: 15px; right: 15px; bottom: 3px;
  height: 2px;
  border-radius: 2px;
  background: var(--brand);
}
.header__actions { display: flex; align-items: center; gap: 12px; }
.header__actions .btn { padding: 11px 22px; font-size: .9rem; }

.nav-toggle {
  display: none;
  width: 44px; height: 44px;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 10px;
  cursor: pointer;
  padding: 0;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}
.nav-toggle span { display: block; width: 20px; height: 2px; background: var(--ink); border-radius: 2px; transition: .2s; }
.nav-toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2) { opacity: 0; }
.nav-toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  isolation: isolate;
  color: #fff;
  background: #0a1631 url("../img/banner.jpg") center / cover no-repeat;
  min-height: 640px;
  display: flex;
  align-items: center;
  padding: 96px 0 110px;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, rgba(5, 18, 45, .94) 0%, rgba(6, 26, 66, .86) 45%, rgba(8, 32, 80, .55) 100%);
  z-index: -1;
}
.hero::after {
  content: "";
  position: absolute;
  right: -180px; top: -160px;
  width: 560px; height: 560px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, rgba(0, 194, 168, .34), transparent 66%);
  z-index: -1;
}
.hero__inner { max-width: 760px; }
.hero h1 { color: #fff; margin-bottom: 22px; }
.hero h1 span { color: var(--accent); }
.hero .eyebrow { background: rgba(255, 255, 255, .13); color: #cfe0ff; }
.hero__lead { font-size: 1.1rem; color: rgba(255, 255, 255, .84); max-width: 640px; margin-bottom: 34px; }
.hero__cta { display: flex; gap: 14px; flex-wrap: wrap; }
.hero__stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  margin-top: 62px;
  padding-top: 34px;
  border-top: 1px solid rgba(255, 255, 255, .18);
  max-width: 780px;
}
.hero__stats strong { display: block; font-size: 1.9rem; color: #fff; line-height: 1.1; }
.hero__stats span { font-size: .85rem; color: rgba(255, 255, 255, .72); }

/* ---------- Page banner (inner pages) ---------- */
.page-hero {
  position: relative;
  isolation: isolate;
  padding: 74px 0 66px;
  color: #fff;
  background: #0a1631 url("../img/banner.jpg") center / cover no-repeat;
}
.page-hero::before {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(100deg, rgba(5, 18, 45, .95), rgba(9, 38, 92, .72));
  z-index: -1;
}
.page-hero h1 { color: #fff; margin-bottom: 12px; }
.page-hero p { color: rgba(255, 255, 255, .8); max-width: 720px; margin: 0; }
.breadcrumb {
  display: flex; flex-wrap: wrap; gap: 8px;
  font-size: .85rem;
  color: rgba(255, 255, 255, .68);
  margin-bottom: 18px;
  padding: 0; list-style: none;
}
.breadcrumb li { display: flex; align-items: center; gap: 8px; margin: 0; }
.breadcrumb li + li::before { content: "/"; opacity: .5; }
.breadcrumb a { color: rgba(255, 255, 255, .82); }
.breadcrumb a:hover { color: #fff; }

/* ---------- Cards ---------- */
.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 26px;
  transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease;
  height: 100%;
}
.card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); border-color: #d5e2fa; }
.card h3 { margin-bottom: 10px; }
.card p:last-child { margin-bottom: 0; }
.card__icon {
  width: 54px; height: 54px;
  border-radius: 14px;
  background: var(--brand-light);
  color: var(--brand);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 18px;
}
.card__icon svg { width: 26px; height: 26px; }

.feature { position: relative; overflow: hidden; }
.feature::after {
  content: attr(data-num);
  position: absolute;
  right: 14px; top: 4px;
  font-size: 3.6rem;
  font-weight: 900;
  color: var(--bg-soft);
  line-height: 1;
  pointer-events: none;
}

/* ---------- Stats strip ---------- */
.stats-strip {
  background: var(--ink);
  color: #fff;
  padding: 54px 0;
}
.stats-strip .grid { gap: 20px; }
.stat { text-align: center; padding: 8px 10px; }
.stat strong { display: block; font-size: clamp(1.8rem, 3vw, 2.6rem); color: #fff; line-height: 1.1; }
.stat strong em { font-style: normal; color: var(--accent); }
.stat span { display: block; font-size: .88rem; color: rgba(255, 255, 255, .66); margin-top: 6px; }

/* ---------- Product cards ---------- */
.product-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 24px; }
.product-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform .22s ease, box-shadow .22s ease;
}
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.product-card__media {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--bg-soft);
}
.product-card__media img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.product-card:hover .product-card__media img { transform: scale(1.06); }
.product-card__body { padding: 22px 22px 24px; display: flex; flex-direction: column; flex: 1; }
.product-card__body h3 { font-size: 1.12rem; margin-bottom: 8px; }
.product-card__body p { font-size: .92rem; color: var(--muted); flex: 1; }
.product-card__link {
  display: inline-flex; align-items: center; gap: 7px;
  font-weight: 700; font-size: .9rem; color: var(--brand);
  margin-top: 6px;
}
.product-card__link svg { transition: transform .2s ease; }
.product-card:hover .product-card__link svg { transform: translateX(4px); }

.tag {
  position: absolute; top: 14px; left: 14px;
  background: rgba(11, 95, 255, .93);
  color: #fff; font-size: .74rem; font-weight: 700;
  padding: 4px 11px; border-radius: 999px;
  letter-spacing: .04em;
}

/* ---------- Case gallery ---------- */
.case-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px; }
.case {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  background: #0a1631;
  box-shadow: var(--shadow-sm);
}
.case img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; transition: transform .5s ease; opacity: .95; }
.case:hover img { transform: scale(1.06); }
.case__cap {
  position: absolute; inset: auto 0 0 0;
  padding: 40px 18px 16px;
  background: linear-gradient(to top, rgba(5, 15, 36, .92), rgba(5, 15, 36, 0));
  color: #fff; font-size: .92rem; font-weight: 600; line-height: 1.45;
}

/* ---------- Split (image + text) ---------- */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 58px;
  align-items: center;
}
.split__media { position: relative; }
.split__media img { border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); width: 100%; }
.split__badge {
  position: absolute; bottom: -22px; right: -18px;
  background: var(--brand); color: #fff;
  border-radius: 16px; padding: 18px 24px;
  box-shadow: 0 18px 40px rgba(11, 95, 255, .32);
  text-align: center;
}
.split__badge strong { display: block; font-size: 1.7rem; line-height: 1.1; }
.split__badge span { font-size: .78rem; opacity: .86; }

.check-list { list-style: none; padding: 0; margin: 0 0 26px; }
.check-list li {
  position: relative;
  padding-left: 34px;
  margin-bottom: 14px;
  color: var(--ink-soft);
}
.check-list li::before {
  content: "";
  position: absolute; left: 0; top: 5px;
  width: 20px; height: 20px; border-radius: 50%;
  background: var(--brand-light) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%230b5fff' stroke-width='3.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E") center / 13px no-repeat;
}

/* ---------- Certificates ---------- */
.cert-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 26px; max-width: 760px; margin: 0 auto; }
.cert { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-sm); }
.cert img { width: 100%; aspect-ratio: 500 / 707; object-fit: cover; }
.cert figcaption { padding: 16px 18px; font-weight: 700; color: var(--ink); text-align: center; font-size: .95rem; }

/* ---------- CTA band ---------- */
.cta-band {
  position: relative;
  isolation: isolate;
  background: linear-gradient(120deg, #0738a3, #0b5fff 55%, #0a86ff);
  color: #fff;
  border-radius: var(--radius-lg);
  padding: 58px 54px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 34px;
  flex-wrap: wrap;
}
.cta-band::after {
  content: "";
  position: absolute; right: -80px; bottom: -120px;
  width: 320px; height: 320px; border-radius: 50%;
  background: rgba(0, 194, 168, .28); z-index: -1;
}
.cta-band h2 { color: #fff; margin-bottom: 8px; }
.cta-band p { margin: 0; color: rgba(255, 255, 255, .84); max-width: 560px; }
.cta-band .btn { background: #fff; color: var(--brand); box-shadow: 0 12px 26px rgba(0, 0, 0, .18); }
.cta-band .btn:hover { background: #f2f6ff; color: var(--brand-dark); }

/* ---------- Product detail ---------- */
.product-detail { display: grid; grid-template-columns: 1.05fr 1fr; gap: 50px; align-items: start; }
.product-detail__media { border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--line); background: var(--bg-soft); }
.product-detail__media img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.product-detail__meta { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 18px; }
.chip {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: .8rem;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: 999px;
}
.spec-table { width: 100%; border-collapse: collapse; margin: 26px 0; font-size: .94rem; }
.spec-table th, .spec-table td { text-align: left; padding: 13px 16px; border-bottom: 1px solid var(--line); vertical-align: top; }
.spec-table th { width: 34%; color: var(--ink); font-weight: 700; background: var(--bg-soft); }

.prose h2 { margin-top: 44px; font-size: clamp(1.3rem, 2.1vw, 1.7rem); }
.prose h3 { margin-top: 30px; }
.prose ul { padding-left: 1.2em; }

.info-note {
  border-left: 4px solid var(--brand);
  background: var(--brand-light);
  padding: 20px 24px;
  border-radius: 0 12px 12px 0;
  color: var(--ink-soft);
  margin: 28px 0;
}
.info-note strong { color: var(--brand-dark); }

/* ---------- FAQ ---------- */
.faq-list { max-width: 900px; margin: 0 auto; }
.faq-item {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  margin-bottom: 14px;
  overflow: hidden;
  transition: border-color .2s ease, box-shadow .2s ease;
}
.faq-item[open] { border-color: #c8daf9; box-shadow: var(--shadow-sm); }
.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 20px 56px 20px 24px;
  position: relative;
  font-weight: 700;
  color: var(--ink);
  font-size: 1.02rem;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  position: absolute; right: 22px; top: 50%;
  transform: translateY(-50%);
  font-size: 1.5rem; font-weight: 400; color: var(--brand);
  line-height: 1;
  transition: transform .2s ease;
}
.faq-item[open] summary::after { content: "–"; }
.faq-item__body { padding: 0 24px 22px; color: var(--muted); }
.faq-item__body p:last-child { margin-bottom: 0; }

/* ---------- Contact / form ---------- */
.contact-layout { display: grid; grid-template-columns: .9fr 1.1fr; gap: 42px; align-items: start; }
.form-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-md);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.field { margin-bottom: 18px; }
.field label { display: block; font-weight: 700; font-size: .88rem; color: var(--ink); margin-bottom: 7px; }
.field label .req { color: #e5484d; }
.field input, .field select, .field textarea {
  width: 100%;
  font-family: inherit;
  font-size: .95rem;
  color: var(--ink);
  background: #fbfcff;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 13px 15px;
  transition: border-color .18s ease, box-shadow .18s ease, background .18s ease;
}
.field textarea { min-height: 140px; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none;
  background: #fff;
  border-color: var(--brand);
  box-shadow: 0 0 0 4px rgba(11, 95, 255, .12);
}
.field--full { grid-column: 1 / -1; }
.form-note { font-size: .82rem; color: var(--muted); margin: 14px 0 0; }
.hp-field { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

.alert {
  border-radius: 12px;
  padding: 16px 20px;
  font-size: .94rem;
  margin-bottom: 22px;
  border: 1px solid transparent;
}
.alert--ok { background: #e9f9f2; border-color: #b6ebd4; color: #0b6b49; }
.alert--err { background: #fdeeee; border-color: #f6c9c9; color: #a32424; }
.alert strong { display: block; margin-bottom: 4px; }

.contact-info { display: grid; gap: 16px; }
.contact-item {
  display: flex;
  gap: 16px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 22px;
}
.contact-item__icon {
  flex: 0 0 44px;
  width: 44px; height: 44px;
  border-radius: 12px;
  background: var(--brand-light);
  color: var(--brand);
  display: flex; align-items: center; justify-content: center;
}
.contact-item__icon svg { width: 22px; height: 22px; }
.contact-item strong { display: block; color: var(--ink); font-size: .92rem; margin-bottom: 3px; }
.contact-item span { font-size: .92rem; color: var(--muted); }

/* ---------- Timeline / process ---------- */
.process { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 22px; counter-reset: step; }
.process__item { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 28px 24px; position: relative; }
.process__item::before {
  counter-increment: step;
  content: "0" counter(step);
  display: block;
  font-size: 1.5rem; font-weight: 900; color: var(--brand);
  margin-bottom: 10px;
}
.process__item h3 { font-size: 1.05rem; margin-bottom: 8px; }
.process__item p { font-size: .92rem; color: var(--muted); margin: 0; }

/* ---------- Footer ---------- */
.site-footer { background: #071022; color: rgba(255, 255, 255, .68); padding: 66px 0 0; font-size: .93rem; }
.site-footer h3 { color: #fff; font-size: 1rem; letter-spacing: .02em; margin-bottom: 18px; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 40px; }
.site-footer a { color: rgba(255, 255, 255, .68); }
.site-footer a:hover { color: #fff; }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin-bottom: 10px; }
.footer-brand img { width: 191px; height: 40px; object-fit: contain; margin-bottom: 18px; filter: brightness(0) invert(1); }
.footer-brand p { max-width: 340px; }
.footer-bottom {
  margin-top: 52px;
  border-top: 1px solid rgba(255, 255, 255, .1);
  padding: 22px 0;
  display: flex; flex-wrap: wrap; gap: 14px;
  align-items: center; justify-content: space-between;
  font-size: .85rem;
  color: rgba(255, 255, 255, .5);
}
.footer-bottom p { margin: 0; }

/* ---------- Back to top ---------- */
.to-top {
  position: fixed;
  right: 22px; bottom: 22px;
  width: 46px; height: 46px;
  border-radius: 50%;
  background: var(--brand);
  color: #fff;
  border: 0;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 12px 28px rgba(11, 95, 255, .34);
  cursor: pointer;
  opacity: 0; visibility: hidden;
  transform: translateY(10px);
  transition: .25s ease;
  z-index: 90;
}
.to-top.is-visible { opacity: 1; visibility: visible; transform: none; }

/* ---------- Reveal animation ---------- */
.js .reveal { opacity: 0; transform: translateY(22px); transition: opacity .6s ease, transform .6s ease; }
.js .reveal.is-in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .js .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------- Responsive ---------- */
@media (max-width: 1080px) {
  .product-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .process { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 34px; }
  .split { gap: 40px; }
  .product-detail { gap: 34px; }
}

@media (max-width: 900px) {
  .nav {
    position: fixed;
    inset: 78px 0 auto 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: #fff;
    border-bottom: 1px solid var(--line);
    padding: 10px 18px 22px;
    box-shadow: var(--shadow-md);
    max-height: calc(100vh - 78px);
    overflow-y: auto;
  }
  .nav.is-open { display: flex; }
  .nav a { padding: 14px 12px; font-size: 1rem; border-bottom: 1px solid var(--line); border-radius: 0; }
  .nav a.is-active::after { display: none; }
  .nav a.is-active { color: var(--brand); }
  .nav-toggle { display: flex; }
  .header__actions .btn { display: none; }
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .case-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .split { grid-template-columns: 1fr; }
  .split--reverse .split__media { order: -1; }
  .split__badge { right: 14px; bottom: -18px; }
  .product-detail { grid-template-columns: 1fr; }
  .contact-layout { grid-template-columns: 1fr; }
  .hero { min-height: auto; padding: 68px 0 76px; }
  .hero__stats { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
  .section { padding: 62px 0; }
  .cta-band { padding: 40px 28px; border-radius: var(--radius); }
  .form-card { padding: 26px 22px; }
}

@media (max-width: 620px) {
  body { font-size: 15.5px; }
  .topbar__list { gap: 12px; font-size: .78rem; }
  .product-grid { grid-template-columns: 1fr; }
  .case-grid { grid-template-columns: 1fr; }
  .process { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; gap: 0; }
  .cert-grid { grid-template-columns: 1fr; }
  .hero__stats strong { font-size: 1.55rem; }
  .section-head { margin-bottom: 36px; }
  .cta-band { flex-direction: column; align-items: flex-start; }
}