/* ==========================================================================
   Car Key Technologies — Global Stylesheet
   Design language: precision, restraint, generous space, quiet confidence.
   ========================================================================== */

:root {
  --black: #0a0a0c;
  --near-black: #101013;
  --ink: #1d1d1f;
  --gray-900: #2b2b30;
  --gray-700: #48484f;
  --gray-500: #6e6e76;
  --gray-300: #a6a6ad;
  --gray-200: #d8d8dd;
  --gray-100: #f0f0f2;
  --white: #ffffff;
  --off-white: #fbfbfc;
  --blue: #0071e3;
  --blue-dark: #0058b0;
  --cyan: #29c1ff;
  --gradient-brand: linear-gradient(135deg, #0071e3 0%, #29c1ff 100%);
  --gradient-dark: linear-gradient(180deg, #0a0a0c 0%, #17171b 100%);
  --radius-sm: 10px;
  --radius-md: 18px;
  --radius-lg: 28px;
  --shadow-soft: 0 20px 60px -20px rgba(0, 0, 0, 0.25);
  --shadow-card: 0 2px 14px rgba(0, 0, 0, 0.06);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --maxw: 1200px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text",
    "Inter", "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.5;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; margin: 0; padding: 0; }
button { font-family: inherit; }

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 32px;
}

section { position: relative; }

/* ---------- Typography ---------- */
h1, h2, h3, h4 {
  margin: 0;
  font-weight: 650;
  letter-spacing: -0.02em;
  line-height: 1.08;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 18px;
}
.eyebrow::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gradient-brand);
}
h1 { font-size: clamp(38px, 5.4vw, 76px); }
h2 { font-size: clamp(30px, 3.6vw, 48px); }
h3 { font-size: clamp(20px, 2vw, 26px); }
p { color: var(--gray-700); font-size: 17px; }
.lede {
  font-size: clamp(18px, 1.6vw, 22px);
  color: var(--gray-500);
  max-width: 620px;
  line-height: 1.5;
}
.section-head {
  max-width: 720px;
  margin-bottom: 64px;
}
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 100px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.35s var(--ease), background 0.25s ease, box-shadow 0.25s ease, color 0.25s ease;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  background: var(--ink);
  color: var(--white);
}
.btn-primary:hover { background: #000; box-shadow: 0 8px 24px rgba(0,0,0,0.2); }
.btn-accent {
  background: var(--gradient-brand);
  color: var(--white);
}
.btn-accent:hover { box-shadow: 0 10px 30px rgba(0,113,227,0.35); }
.btn-ghost {
  background: transparent;
  color: var(--white);
  border-color: rgba(255,255,255,0.35);
}
.btn-ghost:hover { background: rgba(255,255,255,0.1); }
.btn-outline {
  background: transparent;
  color: var(--ink);
  border-color: var(--gray-200);
}
.btn-outline:hover { border-color: var(--ink); }
.btn-row { display: flex; gap: 14px; flex-wrap: wrap; align-items: center; }
.btn-sm { padding: 10px 20px; font-size: 14px; }
.link-arrow { display: inline-flex; align-items: center; gap: 6px; font-weight: 600; color: var(--blue); font-size: 15px; }
.link-arrow svg { width: 14px; height: 14px; transition: transform 0.25s var(--ease); }
.link-arrow:hover svg { transform: translateX(4px); }

/* ---------- Nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10,10,12,0.72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.nav .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--white); font-weight: 650; font-size: 16px; letter-spacing: -0.01em; }
.brand .mark { width: 28px; height: 28px; }
.nav-links { display: flex; align-items: center; gap: 30px; }
.nav-links a {
  color: rgba(255,255,255,0.78);
  font-size: 14px;
  font-weight: 500;
  transition: color 0.2s ease;
}
.nav-links a:hover, .nav-links a.active { color: var(--white); }
.nav-cta { display: flex; align-items: center; gap: 18px; }
.nav-toggle { display: none; }

@media (max-width: 900px) {
  .nav-links { display: none; }
  .nav-toggle {
    display: flex; align-items: center; justify-content: center;
    width: 36px; height: 36px; color: var(--white); background: none; border: none; cursor: pointer;
  }
  .nav-links.open {
    display: flex;
    position: absolute;
    top: 64px; left: 0; right: 0;
    background: rgba(10,10,12,0.98);
    flex-direction: column;
    padding: 24px 32px;
    gap: 20px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
  }
}

/* ---------- Hero ---------- */
.hero {
  background: var(--gradient-dark);
  color: var(--white);
  padding: 120px 0 100px;
  overflow: hidden;
}
.hero .wrap { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 40px; align-items: center; }
.hero h1 { color: var(--white); }
.hero p.lede { color: rgba(255,255,255,0.62); }
.hero-art { position: relative; }
.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  margin-top: 72px;
  padding-top: 36px;
  border-top: 1px solid rgba(255,255,255,0.12);
}
.hero-stats .stat b { display: block; font-size: 28px; color: var(--white); font-weight: 650; letter-spacing: -0.01em; }
.hero-stats .stat span { font-size: 13px; color: rgba(255,255,255,0.5); }

.page-hero {
  background: var(--gradient-dark);
  color: var(--white);
  padding: 84px 0 72px;
}
.page-hero h1 { color: var(--white); }
.page-hero .lede { color: rgba(255,255,255,0.62); }
.breadcrumb { font-size: 13px; color: rgba(255,255,255,0.45); margin-bottom: 20px; }
.breadcrumb a:hover { color: var(--white); }

/* ---------- Sections ---------- */
.section { padding: 110px 0; }
.section-alt { background: var(--off-white); }
.section-dark { background: var(--near-black); color: var(--white); }
.section-dark h2, .section-dark h3 { color: var(--white); }
.section-dark p { color: rgba(255,255,255,0.6); }
.section-tight { padding: 72px 0; }

/* ---------- Grids & Cards ---------- */
.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--white);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius-md);
  padding: 34px;
  box-shadow: var(--shadow-card);
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease);
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-soft); }
.card .icon {
  width: 52px; height: 52px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 14px;
  background: var(--gradient-brand);
  margin-bottom: 22px;
}
.card .icon svg { width: 26px; height: 26px; stroke: white; }
.card h3 { margin-bottom: 10px; }
.card p { font-size: 15px; margin: 0; }

.card-dark {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-md);
  padding: 32px;
}
.card-dark .icon { background: rgba(255,255,255,0.08); }
.card-dark .icon svg { stroke: var(--cyan); }
.card-dark h3 { color: var(--white); margin-bottom: 8px; }
.card-dark p { color: rgba(255,255,255,0.55); font-size: 15px; margin: 0; }

.service-block {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 20px;
  padding: 30px 0;
  border-bottom: 1px solid var(--gray-100);
}
.service-block:last-child { border-bottom: none; }
.service-block .icon {
  width: 44px; height: 44px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  background: var(--gray-100);
}
.service-block .icon svg { width: 22px; height: 22px; stroke: var(--ink); }
.service-block h4 { font-size: 18px; font-weight: 650; margin-bottom: 6px; letter-spacing: -0.01em; }
.service-block p { margin: 0; font-size: 15px; }
.service-block .tags { margin-top: 10px; display: flex; gap: 8px; flex-wrap: wrap; }
.tag {
  font-size: 12px; font-weight: 600; color: var(--gray-500);
  background: var(--gray-100); padding: 5px 10px; border-radius: 100px;
  letter-spacing: 0.01em;
}

.category-nav {
  display: flex; gap: 10px; flex-wrap: wrap;
  margin-bottom: 56px;
  position: sticky; top: 76px; z-index: 10;
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(12px);
  padding: 14px 0;
}
.category-nav a {
  padding: 9px 18px; border-radius: 100px; font-size: 14px; font-weight: 600;
  background: var(--gray-100); color: var(--gray-700);
  transition: background 0.2s ease, color 0.2s ease;
}
.category-nav a:hover { background: var(--ink); color: var(--white); }

/* ---------- Steps ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; counter-reset: step; }
.step { position: relative; padding-top: 46px; }
.step::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  font-size: 14px; font-weight: 700; color: var(--white);
  background: var(--gradient-brand);
  width: 34px; height: 34px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  position: absolute; top: 0; left: 0;
}
.step h4 { font-size: 17px; margin-bottom: 8px; }
.step p { font-size: 14px; margin: 0; }

/* ---------- Logo / trust strip ---------- */
.trust-strip {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 28px;
  padding: 40px 0;
}
.trust-item { display: flex; align-items: center; gap: 12px; color: var(--gray-500); font-weight: 600; font-size: 14px; }
.trust-item svg { width: 22px; height: 22px; stroke: var(--gray-500); flex-shrink: 0; }

/* ---------- Map / network ---------- */
.network-figure {
  background: var(--near-black);
  border-radius: var(--radius-lg);
  padding: 8px;
}

/* ---------- Split ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.split.reverse .split-art { order: 2; }

/* ---------- Stat bar ---------- */
.stat-bar { display: grid; grid-template-columns: repeat(4, 1fr); border-radius: var(--radius-lg); overflow: hidden; }
.stat-bar .stat { padding: 40px 30px; border-right: 1px solid rgba(255,255,255,0.08); }
.stat-bar .stat:last-child { border-right: none; }
.stat-bar .stat b { display: block; font-size: 34px; color: var(--white); font-weight: 650; }
.stat-bar .stat span { font-size: 13px; color: rgba(255,255,255,0.5); }

/* ---------- Industries ---------- */
.industry-row {
  display: grid; grid-template-columns: 60px 260px 1fr; gap: 30px;
  align-items: start;
  padding: 36px 0;
  border-bottom: 1px solid var(--gray-100);
}
.industry-row .icon {
  width: 52px; height: 52px; border-radius: 14px; background: var(--gray-100);
  display: flex; align-items: center; justify-content: center;
}
.industry-row .icon svg { width: 26px; height: 26px; stroke: var(--ink); }
.industry-row h3 { margin-bottom: 6px; }
.industry-row .tags { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 12px; }

/* ---------- CTA banner ---------- */
.cta-banner {
  background: var(--gradient-dark);
  border-radius: var(--radius-lg);
  padding: 80px 60px;
  text-align: center;
  color: var(--white);
  position: relative;
  overflow: hidden;
}
.cta-banner h2 { color: var(--white); margin-bottom: 18px; }
.cta-banner p { color: rgba(255,255,255,0.6); max-width: 520px; margin: 0 auto 34px; }
.cta-banner .btn-row { justify-content: center; }

/* ---------- Form ---------- */
.form-card {
  background: var(--white);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--shadow-soft);
}
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.field { display: flex; flex-direction: column; gap: 8px; margin-bottom: 20px; }
.field.full { grid-column: 1 / -1; }
.field label { font-size: 13px; font-weight: 600; color: var(--gray-700); }
.field input, .field select, .field textarea {
  font-family: inherit;
  font-size: 15px;
  padding: 13px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--gray-200);
  background: var(--off-white);
  color: var(--ink);
  outline: none;
  transition: border-color 0.2s ease, background 0.2s ease;
}
.field input:focus, .field select:focus, .field textarea:focus {
  border-color: var(--blue);
  background: var(--white);
}
.field textarea { resize: vertical; min-height: 120px; font-family: inherit; }
.form-note { font-size: 13px; color: var(--gray-500); margin-top: 18px; }
.form-success {
  display: none;
  background: #eefaf0; border: 1px solid #b9e8c1; color: #1c6b2e;
  padding: 16px 20px; border-radius: var(--radius-sm); font-size: 14px; font-weight: 600;
  margin-bottom: 24px;
}
.form-success.show { display: block; }
.form-tabs { display: flex; gap: 8px; margin-bottom: 28px; }
.form-tab-btn {
  flex: 1;
  padding: 15px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--gray-200);
  background: var(--off-white);
  color: var(--gray-700);
  font-weight: 650;
  font-size: 14px;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  font-family: inherit;
}
.form-tab-btn:hover { border-color: var(--blue); }
.form-tab-btn.active {
  background: linear-gradient(135deg, var(--blue), var(--cyan));
  color: var(--white);
  border-color: transparent;
  box-shadow: 0 10px 24px rgba(0, 113, 227, 0.25);
}
.form-tab-panel { display: none; }
.form-tab-panel.active { display: block; }
.form-embed { border-radius: var(--radius-sm); overflow: hidden; }
.form-embed iframe { width: 100%; border: none; display: block; }

/* ---------- Contact info cards ---------- */
.contact-info-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 56px; }

/* ---------- Footer ---------- */
.footer { background: var(--black); color: rgba(255,255,255,0.5); padding: 72px 0 32px; }
.footer .wrap { }
.footer-top { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 48px; border-bottom: 1px solid rgba(255,255,255,0.08); }
.footer-brand .brand { margin-bottom: 16px; }
.footer-brand p { color: rgba(255,255,255,0.45); font-size: 14px; max-width: 280px; }
.footer h5 { color: rgba(255,255,255,0.8); font-size: 13px; font-weight: 650; text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 18px; }
.footer ul li { margin-bottom: 12px; }
.footer a { font-size: 14px; color: rgba(255,255,255,0.5); transition: color 0.2s ease; }
.footer a:hover { color: var(--white); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding-top: 28px; font-size: 13px; color: rgba(255,255,255,0.35); flex-wrap: wrap; gap: 12px; }

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.8s var(--ease), transform 0.8s var(--ease); }
.reveal.in { opacity: 1; transform: translateY(0); }

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .hero .wrap { grid-template-columns: 1fr; }
  .hero-art { order: -1; }
  .split { grid-template-columns: 1fr; gap: 40px; }
  .split.reverse .split-art { order: 0; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .stat-bar { grid-template-columns: repeat(2, 1fr); }
  .stat-bar .stat:nth-child(2) { border-right: none; }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .industry-row { grid-template-columns: 48px 1fr; }
  .industry-row .icon { grid-row: span 1; }
  .contact-info-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .section { padding: 72px 0; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .stat-bar { grid-template-columns: 1fr; }
  .stat-bar .stat { border-right: none; border-bottom: 1px solid rgba(255,255,255,0.08); }
  .form-grid { grid-template-columns: 1fr; }
  .cta-banner { padding: 56px 28px; }
  .footer-top { grid-template-columns: 1fr; }
  .hero-stats { grid-template-columns: 1fr; gap: 20px; }
}