/* HuoVision — v04 dark-terminal
   canvas #0A0C10 / panel #10141A / line #2A2F38 / text #E6EAF0 / secondary #8A93A3 / accent #C6F24E */

:root {
  --canvas: #0A0C10;
  --panel: #10141A;
  --panel-hi: #12171F;
  --line: #2A2F38;
  --line-hi: #3A4150;
  --text: #E6EAF0;
  --secondary: #8A93A3;
  --accent: #C6F24E;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }

html, body { overflow-x: clip; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--canvas);
  color: var(--text);
  font: 400 16px/1.65 var(--sans);
  -webkit-font-smoothing: antialiased;
}

/* faint 1px grid overlay, ~3% opacity */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(230, 234, 240, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(230, 234, 240, 0.03) 1px, transparent 1px);
  background-size: 44px 44px;
  pointer-events: none;
  z-index: 0;
}

a { color: inherit; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}

.wrap {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 28px;
}

.mono { font-family: var(--mono); }

/* ---------- nav ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(10, 12, 16, 0.94);
  border-bottom: 1px solid var(--line);
}

.nav {
  height: 64px;
  display: flex;
  align-items: stretch;
  gap: 28px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--text);
}

.nav-main {
  display: flex;
  align-items: stretch;
  gap: 2px;
  list-style: none;
  margin: 0;
  padding: 0;
  flex: 1;
  min-width: 0;
}

.nav-main a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 0 11px;
  font-family: var(--mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  text-decoration: none;
  color: var(--secondary);
  border-bottom: 2px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
  white-space: nowrap;
}

.nav-main a:hover { color: var(--text); }

.nav-main a.is-active {
  color: var(--text);
  border-bottom-color: var(--accent);
}

.nav-main a .chev { color: var(--line-hi); flex: none; }
.nav-main a:hover .chev { color: var(--secondary); }

.nav-aside {
  display: flex;
  align-items: center;
  gap: 22px;
}

.nav-aside a {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.07em;
  text-decoration: none;
  color: var(--secondary);
  transition: color 0.15s ease;
  white-space: nowrap;
}

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

/* ---------- hero ---------- */

.hero { padding-top: 96px; padding-bottom: 104px; }

.eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--secondary);
  margin: 0;
}

.hero-row {
  display: flex;
  gap: 28px;
  margin-top: 22px;
}

.accent-bar {
  flex: none;
  width: 3px;
  background: var(--accent);
  border-radius: 2px;
}

h1 {
  margin: 0;
  font-family: var(--mono);
  font-size: clamp(34px, 5.4vw, 64px);
  font-weight: 600;
  line-height: 1.08;
  letter-spacing: -0.015em;
  max-width: 880px;
}

.hero-sub {
  margin: 26px 0 0;
  font-size: 18px;
  line-height: 1.7;
  color: var(--secondary);
  max-width: 680px;
}

.hero-actions {
  margin-top: 42px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 28px;
  border-radius: 4px;
  border: 1px solid transparent;
  font: 600 16px/1 var(--sans);
  text-decoration: none;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary { background: var(--accent); border-color: var(--accent); color: #0A0C10; }
.btn-primary:hover { background: #D3FF6A; border-color: #D3FF6A; }

.btn-secondary { background: transparent; border-color: var(--line-hi); color: var(--text); }
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- sections ---------- */

.section { border-top: 1px solid var(--line); padding: 100px 0; }

.section-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 0 0 52px;
}

.section-head::before {
  content: "";
  width: 10px;
  height: 10px;
  background: var(--accent);
  flex: none;
}

h2 {
  margin: 0;
  font-family: var(--mono);
  font-size: 16px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text);
}

/* ---------- business lines: 2x2 framed cells ---------- */

.lines {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 4px;
  overflow: hidden;
}

.line-cell {
  background: var(--panel);
  padding: 34px 36px 38px;
  transition: background 0.2s ease;
}

.line-cell:hover { background: var(--panel-hi); }

.line-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.line-idx {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--accent);
}

.line-icon { color: var(--secondary); flex: none; }

.line-name { margin: 22px 0 0; font-size: 19px; font-weight: 600; line-height: 1.35; }

.line-tag { margin: 6px 0 0; font-size: 16px; line-height: 1.55; color: var(--text); }

.line-body { margin: 12px 0 0; font-size: 16px; line-height: 1.6; color: var(--secondary); }

/* ---------- why on-device: three columns ---------- */

.why {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
}

.why-col { padding: 0 40px; border-left: 1px solid var(--line); min-width: 0; }
.why-col:first-child { padding-left: 0; border-left: none; }

.why-title {
  display: flex;
  gap: 12px;
  margin: 0;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.4;
}

.why-title .b {
  font-family: var(--mono);
  color: var(--accent);
  flex: none;
}

.why-tag { margin: 6px 0 0; font-size: 16px; color: var(--text); padding-left: 22px; }

.why-body { margin: 14px 0 0; font-size: 16px; line-height: 1.65; color: var(--secondary); padding-left: 22px; }

/* ---------- products: spec-sheet table ---------- */

.spec { border-top: 1px solid var(--line); }

.spec-row {
  display: grid;
  grid-template-columns: 170px 320px minmax(0, 1fr);
  gap: 36px;
  padding: 30px 0;
  border-bottom: 1px solid var(--line);
}

.spec-label {
  font-family: var(--mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--secondary);
  padding-top: 5px;
}

.spec-name { margin: 0; font-size: 18px; font-weight: 600; line-height: 1.4; }

.spec-line { margin: 0; font-size: 16px; line-height: 1.65; color: var(--secondary); }

.spec-line .fig { color: var(--accent); }

/* ---------- customers: four rows ---------- */

.cases { border-top: 1px solid var(--line); }

.case {
  display: grid;
  grid-template-columns: 72px 280px minmax(0, 1fr);
  gap: 32px;
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
}

.case-idx {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--secondary);
  padding-top: 4px;
}

.case-name { margin: 0; font-size: 17px; font-weight: 600; line-height: 1.4; }

.case-desc { margin: 0; font-size: 16px; line-height: 1.65; color: var(--secondary); }

/* ---------- resources: rows with + glyph ---------- */

.papers { border-top: 1px solid var(--line); }

.paper {
  display: grid;
  grid-template-columns: 30px 400px minmax(0, 1fr);
  gap: 30px;
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
}

.paper-glyph { color: var(--accent); padding-top: 4px; }

.paper-title {
  margin: 0;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.45;
}

.paper-title a {
  color: var(--text);
  text-decoration: none;
  background-image: linear-gradient(var(--accent), var(--accent));
  background-size: 0% 1px;
  background-position: 0 100%;
  background-repeat: no-repeat;
  transition: background-size 0.2s ease;
}

.paper-title a:hover { background-size: 100% 1px; }

.paper-desc { margin: 0; font-size: 16px; line-height: 1.65; color: var(--secondary); }

/* ---------- CTA ---------- */

.cta-block {
  position: relative;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--panel);
  padding: 64px 68px;
}

.cta-block::before,
.cta-block::after {
  content: "";
  position: absolute;
  width: 8px;
  height: 8px;
  background: var(--accent);
}

.cta-block::before { top: -1px; left: -1px; }
.cta-block::after { bottom: -1px; right: -1px; }

.cta-title {
  margin: 0;
  font-family: var(--mono);
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 600;
  letter-spacing: -0.01em;
  text-transform: none;
}

.cta-body {
  margin: 18px 0 0;
  font-size: 17px;
  line-height: 1.7;
  color: var(--secondary);
  max-width: 660px;
}

.cta-actions { margin-top: 36px; }

/* ---------- footer ---------- */

.site-footer { border-top: 1px solid var(--line); padding: 52px 0 40px; }

.footer-legal {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--secondary);
  margin-bottom: 40px;
}

.footer-legal nav { display: flex; flex-wrap: wrap; gap: 20px; }

.footer-legal a {
  color: var(--secondary);
  text-decoration: none;
  transition: color 0.15s ease;
}

.footer-legal a:hover { color: var(--text); }

.lang { position: relative; }

.lang summary {
  list-style: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--secondary);
  padding: 4px 0;
  border-bottom: 1px solid transparent;
  transition: color 0.15s ease;
}

.lang summary::-webkit-details-marker { display: none; }
.lang summary:hover { color: var(--text); }

.lang-menu {
  position: absolute;
  right: 0;
  top: calc(100% + 6px);
  min-width: 130px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 6px;
  z-index: 20;
}

.lang-menu a {
  display: block;
  padding: 8px 12px;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--secondary);
  text-decoration: none;
  border-radius: 4px;
}

.lang-menu a:hover,
.lang-menu a[aria-current] { color: var(--text); background: var(--panel-hi); }

.footer-cols {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 72px;
}

.footer-brand .brand { pointer-events: none; }

.footer-col { display: grid; gap: 12px; align-content: start; }

.footer-col a {
  font-size: 14px;
  color: var(--secondary);
  text-decoration: none;
  transition: color 0.15s ease;
}

.footer-col a:hover { color: var(--text); }

.footer-bottom {
  margin-top: 48px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 13px;
  color: var(--secondary);
}

/* ---------- responsive ---------- */

/* medium: Customers and Company collapse */
@media (max-width: 1120px) {
  .nav-main .collapse-md { display: none; }
}

@media (max-width: 900px) {
  .nav-main .collapse-md { display: inline-flex; }

  .site-header { position: static; }

  .nav {
    height: auto;
    flex-wrap: wrap;
    padding-top: 12px;
    padding-bottom: 12px;
    gap: 8px;
  }

  .brand { flex: none; padding: 8px 0; }

  .nav-aside {
    order: 2;
    margin-left: auto;
    gap: 16px;
  }

  .nav-main {
    order: 3;
    width: 100%;
    overflow-x: auto;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
    padding: 2px 0;
  }

  .nav-main::-webkit-scrollbar { display: none; }

  .nav-main a { padding: 10px 10px; }

  .hero { padding-top: 64px; padding-bottom: 72px; }
  .section { padding: 72px 0; }
  .section-head { margin-bottom: 40px; }

  .lines { grid-template-columns: 1fr; }

  .why { grid-template-columns: 1fr; }
  .why-col { padding: 0; border-left: none; border-top: 1px solid var(--line); }
  .why-col:first-child { border-top: none; }
  .why-col { padding-top: 32px; }
  .why-col:first-child { padding-top: 0; }
  .why-tag, .why-body { padding-left: 22px; }

  .spec-row { grid-template-columns: 1fr; gap: 8px; padding: 26px 0; }
  .spec-label { padding-top: 0; }

  .case { grid-template-columns: 56px minmax(0, 1fr); gap: 14px 20px; padding: 24px 0; }
  .case-idx { grid-row: 1; }
  .case-name { grid-column: 2; }
  .case-desc { grid-column: 2; }

  .paper { grid-template-columns: 26px minmax(0, 1fr); gap: 10px 18px; padding: 22px 0; }
  .paper-desc { grid-column: 2; }

  .cta-block { padding: 40px 28px; }

  .footer-cols { grid-template-columns: 1fr 1fr; gap: 40px; }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 480px) {
  .wrap { padding: 0 20px; }

  .hero { padding-top: 52px; padding-bottom: 60px; }
  .hero-row { gap: 18px; }
  .hero-sub { font-size: 17px; }

  .line-cell { padding: 26px 22px 30px; }
  .cta-block { padding: 32px 20px; }

  .footer-legal { align-items: flex-start; flex-direction: column; gap: 14px; }
  .lang-menu { right: auto; left: 0; }
}