/* ==========================================================================
   NORTHSTAR — zero-dependency stylesheet
   No web fonts, no external assets, no build step required for the CSS itself.
   ========================================================================== */

:root {
  --ink: #0B1B2B;
  --ink-2: #122A42;
  --ink-3: #1C3A58;
  --body: #4A5F75;
  --muted: #7A8DA1;
  --line: #E2E9F1;
  --bg: #FFFFFF;
  --soft: #F5F8FC;
  --primary: #1E5EFF;
  --primary-dark: #1247CC;
  --accent: #FFB547;
  --accent-dark: #E89A28;
  --r: 14px;
  --r-sm: 10px;
  --shadow-sm: 0 2px 10px rgba(11, 27, 43, .05);
  --shadow-md: 0 14px 38px rgba(11, 27, 43, .09);
  --shadow-lg: 0 26px 70px rgba(11, 27, 43, .16);
  --maxw: 1180px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--body);
  background: var(--bg);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; display: block; }
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); }
h1, h2, h3, h4 { color: var(--ink); line-height: 1.18; letter-spacing: -.025em; margin: 0 0 18px; font-weight: 750; }
h1 { font-size: clamp(2.35rem, 5vw, 3.75rem); }
h2 { font-size: clamp(1.85rem, 3.4vw, 2.65rem); }
h3 { font-size: 1.2rem; }
p { margin: 0 0 16px; }
ul, ol { margin: 0; padding: 0; list-style: none; }
:focus-visible { outline: 3px solid var(--primary); outline-offset: 3px; border-radius: 4px; }

.container { width: min(100% - 48px, var(--maxw)); margin-inline: auto; }
.container-narrow { width: min(100% - 48px, 820px); }
.section { padding: 96px 0; }
.section-soft { background: var(--soft); }
.h3 { font-size: 1.5rem; }

.skip-link {
  position: absolute; left: -9999px; top: 8px; z-index: 200;
  background: #fff; color: var(--ink); padding: 10px 18px; border-radius: 8px; box-shadow: var(--shadow-md);
}
.skip-link:focus { left: 16px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  padding: 12px 22px; border-radius: var(--r-sm); border: 1.5px solid transparent;
  font: inherit; font-size: .95rem; font-weight: 650; line-height: 1.3;
  cursor: pointer; transition: transform .18s ease, background .18s ease, box-shadow .18s ease, border-color .18s ease;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn-lg { padding: 15px 28px; font-size: 1rem; }
.btn-block { width: 100%; }
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 8px 20px rgba(30, 94, 255, .22); }
.btn-primary:hover { background: var(--primary-dark); color: #fff; box-shadow: 0 12px 26px rgba(30, 94, 255, .3); }
.btn-accent { background: var(--accent); color: #241703; box-shadow: 0 10px 26px rgba(255, 181, 71, .22); }
.btn-accent:hover { background: #FFC475; color: #241703; }
.btn-ghost { background: transparent; color: #EAF2FF; border-color: rgba(255, 255, 255, .3); }
.btn-ghost:hover { background: rgba(255, 255, 255, .09); color: #fff; border-color: rgba(255, 255, 255, .55); }
.text-link { font-weight: 650; font-size: .95rem; display: inline-flex; gap: 8px; align-items: center; }
.text-link span { transition: transform .2s ease; }
.text-link:hover span { transform: translateX(4px); }

/* ---------- Demo notice ---------- */
.demo-notice {
  background: #FFF7E6; border-bottom: 1px solid #F6DFAF; color: #7A5312;
  font-size: .82rem; text-align: center; padding: 8px 44px 8px 16px; position: relative;
}
.demo-notice button {
  position: absolute; right: 10px; top: 50%; transform: translateY(-50%);
  background: none; border: 0; font-size: 1.15rem; line-height: 1; cursor: pointer; color: #A87A24; padding: 4px 8px;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100; background: rgba(255, 255, 255, .94);
  backdrop-filter: blur(12px); border-bottom: 1px solid var(--line); transition: box-shadow .2s ease;
}
.site-header.scrolled { box-shadow: 0 6px 24px rgba(11, 27, 43, .07); }
.header-inner { display: flex; align-items: center; justify-content: space-between; min-height: 74px; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 11px; color: var(--ink); }
.brand:hover { color: var(--ink); }
.brand-mark { width: 34px; height: 34px; color: var(--primary); flex: none; }
.brand-mark svg { width: 100%; height: 100%; }
.brand-text { display: flex; flex-direction: column; line-height: 1.05; }
.brand-text strong { font-size: 1.05rem; letter-spacing: .1em; font-weight: 800; }
.brand-text small { font-size: .58rem; letter-spacing: .28em; color: var(--muted); font-weight: 650; margin-top: 4px; }
.primary-nav { display: flex; align-items: center; gap: 19px; }
.primary-nav > a:not(.btn) { color: #33485F; font-size: .89rem; font-weight: 600; position: relative; padding: 6px 0; }
.primary-nav > a:not(.btn)::after {
  content: ""; position: absolute; left: 0; bottom: 0; height: 2px; width: 0; background: var(--primary); transition: width .2s ease;
}
.primary-nav > a:not(.btn):hover, .primary-nav > a.active { color: var(--ink); }
.primary-nav > a:not(.btn):hover::after, .primary-nav > a.active::after { width: 100%; }
.nav-cta { padding: 10px 20px; font-size: .9rem; }
.nav-toggle { display: none; background: none; border: 0; cursor: pointer; padding: 8px; flex-direction: column; gap: 5px; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--ink); border-radius: 2px; transition: transform .2s ease, opacity .2s ease; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Shared headings ---------- */
.eyebrow {
  font-size: .74rem; font-weight: 750; letter-spacing: .16em; text-transform: uppercase;
  color: var(--primary); display: flex; align-items: center; gap: 9px; margin: 0 0 18px;
}
.eyebrow-light { color: #7FB2FF; }
.eyebrow .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 5px rgba(255, 181, 71, .15); }
.section-head { margin-bottom: 52px; }
.section-head.centered { text-align: center; max-width: 720px; margin-inline: auto; }
.section-head.centered .eyebrow { justify-content: center; }
.section-head.centered > p:not(.eyebrow) { font-size: 1.05rem; max-width: 620px; margin: 0 auto; }
.section-head.split { display: grid; grid-template-columns: 1fr .85fr; gap: 60px; align-items: end; }
.section-head.split h2 { margin-bottom: 0; }
.section-head-aside p { margin-bottom: 14px; }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden; color: #C6D8EC;
  background: radial-gradient(1100px 620px at 78% 12%, #173E6C 0%, transparent 62%), linear-gradient(145deg, #0A1828 0%, #0D2743 58%, #0A1D33 100%);
}
.hero-glow { position: absolute; width: 560px; height: 560px; right: -160px; bottom: -300px; background: radial-gradient(circle, rgba(30, 94, 255, .22), transparent 68%); pointer-events: none; }
.hero-inner { display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center; padding-top: 92px; padding-bottom: 92px; position: relative; }
.hero h1 { color: #fff; max-width: 14ch; margin-bottom: 22px; }
.hero-lead { font-size: 1.1rem; line-height: 1.8; max-width: 54ch; color: #B9CCE2; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin: 34px 0 18px; }
.hero-note { display: flex; align-items: center; gap: 8px; font-size: .85rem; color: #8FA9C6; }
.hero-note svg { width: 16px; height: 16px; flex: none; }
.hero-stats { display: flex; gap: 0; margin-top: 46px; border-top: 1px solid rgba(255, 255, 255, .13); padding-top: 26px; }
.hero-stats > div { flex: 1; padding-right: 18px; border-right: 1px solid rgba(255, 255, 255, .1); }
.hero-stats > div + div { padding-left: 24px; }
.hero-stats > div:last-child { border-right: 0; }
.hero-stats strong { display: block; color: #fff; font-size: 1.65rem; font-weight: 750; letter-spacing: -.03em; line-height: 1.2; }
.hero-stats span { font-size: .78rem; color: #8FA9C6; }

.hero-art { position: relative; border: 1px solid rgba(140, 190, 255, .16); border-radius: 18px; overflow: hidden; background: rgba(8, 26, 46, .55); box-shadow: var(--shadow-lg); }
.hero-art > svg { width: 100%; height: auto; }
.art-chip {
  position: absolute; font-size: .66rem; letter-spacing: .1em; color: #A9C8EC;
  background: rgba(10, 30, 52, .92); border: 1px solid rgba(140, 190, 255, .22);
  padding: 9px 13px; border-radius: 8px; display: flex; align-items: center; gap: 8px; backdrop-filter: blur(6px);
}
.art-chip b { color: #7BE0B8; font-weight: 700; }
.art-chip-top { top: 22px; right: 20px; }
.art-chip-bottom { bottom: 22px; left: 20px; }
.chip-dot { width: 6px; height: 6px; border-radius: 50%; background: #7BE0B8; box-shadow: 0 0 8px #7BE0B8; }

/* ---------- Trust bar ---------- */
.trust-bar { border-bottom: 1px solid var(--line); background: #fff; padding: 38px 0; }
.trust-heading { text-align: center; font-size: .78rem; letter-spacing: .14em; text-transform: uppercase; color: var(--muted); font-weight: 650; margin-bottom: 26px; }
.stats-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.stats-row > div { text-align: center; padding: 4px 12px; border-right: 1px solid var(--line); }
.stats-row > div:last-child { border-right: 0; }
.stats-row strong { display: block; font-size: 2rem; color: var(--ink); font-weight: 780; letter-spacing: -.04em; line-height: 1.15; }
.stats-row span { font-size: .85rem; color: var(--muted); }

/* ---------- Product cards ---------- */
.product-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.product-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--r); overflow: hidden;
  display: flex; flex-direction: column; transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease;
}
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: #C9D9EE; }
.card-art { position: relative; height: 172px; overflow: hidden; display: grid; place-items: center; }
.card-art svg { width: 100%; height: 100%; }
.card-art::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 55%, rgba(11, 27, 43, .07)); }
.card-body { padding: 22px 22px 24px; display: flex; flex-direction: column; flex: 1; }
.card-cat { font-size: .68rem; font-weight: 750; letter-spacing: .14em; text-transform: uppercase; color: var(--primary); margin-bottom: 10px; }
.card-body h3 { font-size: 1.14rem; margin-bottom: 10px; }
.card-body h3 a { color: var(--ink); }
.card-body h3 a:hover { color: var(--primary); }
.card-body p { font-size: .88rem; line-height: 1.65; margin-bottom: 18px; flex: 1; }
.card-link { font-size: .86rem; font-weight: 700; display: inline-flex; align-items: center; gap: 7px; }

/* ---------- Reasons ---------- */
.reason-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.reason-item { background: #fff; border: 1px solid var(--line); border-radius: var(--r); padding: 32px; display: flex; gap: 22px; }
.reason-num { font-size: 1.55rem; font-weight: 800; color: #D3E0F0; letter-spacing: -.04em; line-height: 1; flex: none; }
.reason-item h3 { font-size: 1.1rem; margin-bottom: 9px; }
.reason-item p { font-size: .93rem; margin: 0; }

/* ---------- Steps ---------- */
.steps-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 26px; counter-reset: step; }
.steps-row li { position: relative; padding-top: 42px; }
.steps-row li::before {
  counter-increment: step; content: counter(step, decimal-leading-zero);
  position: absolute; top: 0; left: 0; width: 32px; height: 32px; border-radius: 50%;
  background: #EAF1FF; color: var(--primary); font-size: .78rem; font-weight: 800; display: grid; place-items: center;
}
.steps-row li::after { content: ""; position: absolute; top: 16px; left: 44px; right: 12px; height: 1px; background: var(--line); }
.steps-row li:last-child::after { display: none; }
.steps-row h3 { font-size: 1.02rem; margin-bottom: 8px; }
.steps-row p { font-size: .88rem; margin: 0; }

/* ---------- FAQ ---------- */
.faq-list { border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary {
  list-style: none; cursor: pointer; padding: 22px 44px 22px 0; position: relative;
  color: var(--ink); font-weight: 650; font-size: 1.02rem;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after {
  content: "+"; position: absolute; right: 6px; top: 50%; transform: translateY(-50%);
  width: 26px; height: 26px; border-radius: 50%; background: #EAF1FF; color: var(--primary);
  display: grid; place-items: center; font-size: 1.1rem; line-height: 1;
}
.faq-list details[open] summary::after { content: "−"; }
.faq-list details > p { padding: 0 44px 24px 0; margin: 0; font-size: .94rem; }
.faq-foot { text-align: center; margin-top: 34px; }

/* ---------- CTA band ---------- */
.cta-band {
  background: radial-gradient(700px 320px at 12% 20%, #1B4A80 0%, transparent 70%), linear-gradient(120deg, #0C2036, #102F52);
  color: #B9CCE2; padding: 72px 0;
}
.cta-band-compact { padding: 60px 0; }
.cta-inner { display: grid; grid-template-columns: 1.2fr .8fr; gap: 48px; align-items: center; }
.cta-band h2 { color: #fff; font-size: clamp(1.7rem, 3vw, 2.3rem); margin-bottom: 12px; max-width: 20ch; }
.cta-band p { margin: 0; max-width: 52ch; }
.cta-actions { display: flex; flex-direction: column; align-items: flex-start; gap: 14px; }
.cta-actions > span { font-size: .84rem; color: #9DB6D1; }
.cta-actions a:not(.btn) { color: #FFD08A; }

/* ---------- Page hero / breadcrumb ---------- */
.page-hero {
  background: radial-gradient(800px 360px at 85% 0%, #173E6C 0%, transparent 68%), linear-gradient(135deg, #0A1828, #0F2C4B);
  color: #B9CCE2; padding: 78px 0 84px;
}
.page-hero h1 { color: #fff; max-width: 18ch; margin-bottom: 18px; font-size: clamp(2.1rem, 4vw, 3.1rem); }
.page-lead { font-size: 1.08rem; max-width: 62ch; margin: 0; }
.breadcrumb { background: var(--soft); border-bottom: 1px solid var(--line); font-size: .83rem; padding: 14px 0; color: var(--muted); }
.breadcrumb .container { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
.breadcrumb a { color: var(--body); }
.breadcrumb span[aria-current] { color: var(--ink); font-weight: 600; }

/* ---------- Product listing ---------- */
.product-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px; }
.product-row-card {
  display: grid; grid-template-columns: 190px 1fr; background: #fff; border: 1px solid var(--line);
  border-radius: var(--r); overflow: hidden; transition: transform .22s ease, box-shadow .22s ease;
}
.product-row-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.product-row-card .card-art { height: 100%; min-height: 236px; }
.row-body { padding: 26px; display: flex; flex-direction: column; }
.row-body h2 { font-size: 1.35rem; margin-bottom: 6px; }
.row-body h2 a { color: var(--ink); }
.row-body h2 a:hover { color: var(--primary); }
.row-tagline { font-size: .9rem; color: var(--primary); font-weight: 600; margin-bottom: 12px; }
.row-body > p { font-size: .9rem; margin-bottom: 16px; flex: 1; }
.row-specs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.row-specs span { font-size: .74rem; background: var(--soft); border: 1px solid var(--line); color: var(--body); padding: 4px 10px; border-radius: 20px; }

/* ---------- Product detail ---------- */
.detail-hero { padding: 72px 0; }
.detail-grid { display: grid; grid-template-columns: 1fr .85fr; gap: 56px; align-items: center; }
.detail-copy h1 { font-size: clamp(2rem, 4vw, 3rem); margin-bottom: 12px; }
.detail-tagline { font-size: 1.12rem; color: var(--primary); font-weight: 600; margin-bottom: 18px; }
.detail-summary { font-size: 1.02rem; max-width: 56ch; }
.detail-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 22px; margin-top: 30px; }
.detail-art { border-radius: var(--r); overflow: hidden; box-shadow: var(--shadow-md); }
.detail-art svg { width: 100%; height: auto; }
.detail-columns { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; }
.detail-columns .eyebrow { margin-bottom: 10px; }
.spec-table { width: 100%; border-collapse: collapse; font-size: .92rem; }
.spec-table tr { border-bottom: 1px solid var(--line); }
.spec-table tr:last-child { border-bottom: 0; }
.spec-table th { text-align: left; color: var(--muted); font-weight: 600; padding: 13px 12px 13px 0; width: 40%; vertical-align: top; }
.spec-table td { color: var(--ink); font-weight: 600; padding: 13px 0; }
.feature-list li { position: relative; padding: 11px 0 11px 30px; border-bottom: 1px solid var(--line); font-size: .94rem; color: var(--body); }
.feature-list li:last-child { border-bottom: 0; }
.feature-list li::before {
  content: "✓"; position: absolute; left: 0; top: 11px; width: 20px; height: 20px; border-radius: 50%;
  background: #E4F6EF; color: #0E9F8A; font-size: .72rem; font-weight: 800; display: grid; place-items: center;
}

/* ---------- About ---------- */
.story-grid { display: grid; grid-template-columns: 1fr .9fr; gap: 64px; align-items: center; }
.story-text { font-size: 1.03rem; max-width: 54ch; }
.story-visual { position: relative; }
.visual-card {
  background: linear-gradient(150deg, #0E2A49, #123B66); border-radius: var(--r); padding: 34px; color: #A9C8EC; min-height: 290px;
  display: flex; flex-direction: column; justify-content: space-between; box-shadow: var(--shadow-lg);
}
.visual-label, .visual-foot { font-size: .7rem; letter-spacing: .16em; font-weight: 650; }
.visual-foot { color: #7FB2FF; }
.visual-bars { display: flex; align-items: flex-end; gap: 12px; height: 140px; }
.visual-bars i { flex: 1; border-radius: 5px 5px 0 0; background: linear-gradient(180deg, #5AA9FF, rgba(90, 169, 255, .15)); }
.visual-bars i:nth-child(1) { height: 42%; } .visual-bars i:nth-child(2) { height: 65%; }
.visual-bars i:nth-child(3) { height: 52%; } .visual-bars i:nth-child(4) { height: 82%; }
.visual-bars i:nth-child(5) { height: 71%; } .visual-bars i:nth-child(6) { height: 94%; }
.visual-bars i:nth-child(7) { height: 78%; }
.visual-float {
  position: absolute; right: -18px; bottom: -20px; background: #fff; border: 1px solid var(--line);
  border-radius: 10px; padding: 14px 20px; box-shadow: var(--shadow-md); font-size: .68rem; letter-spacing: .1em; color: var(--muted);
}
.visual-float b { display: block; font-size: 1.3rem; color: var(--ink); letter-spacing: -.02em; margin-top: 2px; }
.value-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.value-item { background: #fff; border: 1px solid var(--line); border-radius: var(--r); padding: 30px; }
.value-item h3 { font-size: 1.08rem; }
.value-item p { font-size: .9rem; margin: 0; }
.timeline { border-left: 2px solid var(--line); padding-left: 30px; margin-left: 8px; }
.timeline li { position: relative; padding: 0 0 28px 8px; }
.timeline li:last-child { padding-bottom: 0; }
.timeline li::before { content: ""; position: absolute; left: -39px; top: 7px; width: 12px; height: 12px; border-radius: 50%; background: var(--primary); box-shadow: 0 0 0 5px #E4EDFF; }
.timeline strong { display: block; color: var(--ink); font-size: 1.02rem; margin-bottom: 4px; }
.timeline p { font-size: .93rem; margin: 0; }

/* ---------- Contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 48px; align-items: start; }
.form-card { background: #fff; border: 1px solid var(--line); border-radius: var(--r); padding: 36px; box-shadow: var(--shadow-sm); }
.form-card h2 { margin-bottom: 26px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.field { display: block; margin-bottom: 18px; }
.field > span { display: block; font-size: .84rem; font-weight: 650; color: var(--ink); margin-bottom: 8px; }
.field > span b { color: var(--primary); }
.field input, .field textarea {
  width: 100%; font: inherit; font-size: .93rem; color: var(--ink); background: #FBFDFF;
  border: 1px solid #D8E2EE; border-radius: var(--r-sm); padding: 12px 14px; transition: border-color .18s ease, box-shadow .18s ease;
}
.field textarea { resize: vertical; min-height: 130px; }
.field input:focus, .field textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(30, 94, 255, .12); }
.field input:user-invalid, .field textarea:user-invalid { border-color: #E08A8A; }
.form-note { font-size: .8rem; color: var(--muted); margin: 14px 0 0; }
.form-status { margin: 14px 0 0; padding: 12px 14px; border-radius: 8px; background: #E4F6EF; color: #0B7A68; font-size: .88rem; font-weight: 600; }
.contact-aside { display: flex; flex-direction: column; gap: 24px; }
.aside-block { background: var(--soft); border: 1px solid var(--line); border-radius: var(--r); padding: 26px; }
.aside-block .eyebrow { margin-bottom: 14px; }
.aside-block > p:not(.eyebrow) { font-size: .92rem; margin: 0; }
.aside-highlight { background: #EAF1FF; border-color: #D2E0FF; }
.contact-list li { padding: 10px 0; border-bottom: 1px solid var(--line); font-size: .92rem; }
.contact-list li:last-child { border-bottom: 0; }
.contact-list li > span:first-child { display: block; font-size: .72rem; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); font-weight: 650; }

/* ---------- 404 ---------- */
.not-found { padding: 120px 0 140px; text-align: center; background: var(--soft); }
.error-code { font-size: clamp(5rem, 14vw, 9rem); font-weight: 800; color: #D8E4F3; line-height: 1; letter-spacing: -.06em; margin-bottom: 10px; }
.not-found p { margin-bottom: 28px; }

/* ---------- Footer ---------- */
.site-footer { background: #081726; color: #8FA7BF; padding: 68px 0 26px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1.2fr; gap: 56px; padding-bottom: 48px; }
.brand-light { color: #fff; margin-bottom: 18px; }
.brand-light .brand-mark { color: var(--accent); }
.brand-light .brand-text small { color: #7E96AF; }
.brand-light .brand-mark svg circle { fill: #081726; }
.footer-brand p { font-size: .9rem; max-width: 38ch; margin: 0; }
.footer-col h3 { color: #fff; font-size: .78rem; letter-spacing: .15em; text-transform: uppercase; margin-bottom: 20px; }
.footer-col ul li { margin-bottom: 11px; font-size: .9rem; }
.footer-col a { color: #8FA7BF; }
.footer-col a:hover { color: #fff; }
.footer-contact li > span:first-child { display: block; font-size: .68rem; letter-spacing: .12em; text-transform: uppercase; color: #5F7893; }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, .09); padding-top: 22px; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.footer-bottom p { margin: 0; font-size: .8rem; color: #6F879F; }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .hero-inner { gap: 32px; }
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { gap: 32px; }
  .primary-nav { gap: 22px; }
}
@media (max-width: 860px) {
  .section { padding: 72px 0; }
  .hero-inner, .detail-grid, .story-grid, .cta-inner, .contact-grid, .detail-columns, .section-head.split { grid-template-columns: 1fr; gap: 36px; }
  .hero-inner { padding-top: 60px; padding-bottom: 60px; }
  .hero-art { max-width: 520px; }
  .hero-stats { margin-top: 34px; }
  .section-head.split { gap: 20px; }
  .nav-toggle { display: flex; }
  .primary-nav {
    position: absolute; top: 100%; left: 0; right: 0; background: #fff; border-bottom: 1px solid var(--line);
    flex-direction: column; align-items: stretch; gap: 0; padding: 12px 24px 22px; box-shadow: var(--shadow-md);
    display: none;
  }
  .primary-nav.open { display: flex; }
  .primary-nav > a:not(.btn) { padding: 13px 0; border-bottom: 1px solid var(--line); }
  .primary-nav > a:not(.btn)::after { display: none; }
  .nav-cta { margin-top: 16px; }
  .steps-row { grid-template-columns: repeat(2, 1fr); row-gap: 34px; }
  .steps-row li:nth-child(2)::after { display: none; }
  .value-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
  .detail-art { max-width: 520px; }
}
@media (max-width: 620px) {
  .container, .container-narrow { width: min(100% - 36px, var(--maxw)); }
  .section { padding: 60px 0; }
  .product-grid, .reason-grid, .product-list, .stats-row, .steps-row, .field-row { grid-template-columns: 1fr; }
  .steps-row li::after { display: none; }
  .stats-row > div { border-right: 0; border-bottom: 1px solid var(--line); padding: 14px 0; }
  .stats-row > div + div { padding-left: 0; }
  .stats-row > div:last-child { border-bottom: 0; }
  .hero-stats { flex-wrap: wrap; gap: 18px 0; }
  .hero-stats > div { flex: 0 0 50%; }
  .product-row-card { grid-template-columns: 1fr; }
  .product-row-card .card-art { min-height: 170px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-brand { grid-column: auto; }
  .form-card { padding: 24px; }
  .art-chip { font-size: .58rem; padding: 7px 9px; }
  .art-chip-bottom { display: none; }
  .visual-float { right: 0; }
  .reason-item, .value-item { padding: 24px; }
  .cta-actions .btn { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

/* ==========================================================================
   Leiteng Power — real-photo layout, service, quality and shared inquiry form
   ========================================================================== */

/* Brand logo (transparent PNG cropped from the company business card) */
.brand-logo { display: block; width: auto; height: 54px; max-width: 200px; object-fit: contain; }
.brand-light .brand-logo { background: #fff; padding: 6px 10px; border-radius: 8px; height: 50px; }
.header-inner { min-height: 80px; }

/* Hero photograph */
.hero-media {
  position: relative; overflow: hidden; border-radius: 18px;
  border: 1px solid rgba(140, 190, 255, .18); background: #0C2138;
  box-shadow: var(--shadow-lg); aspect-ratio: 4 / 3;
}
.hero-media > img { width: 100%; height: 100%; object-fit: cover; display: block; }
.media-shade { position: absolute; inset: 0; background: linear-gradient(180deg, rgba(6, 20, 36, .06) 35%, rgba(6, 20, 36, .82) 100%); }
.media-caption {
  position: absolute; right: 22px; bottom: 20px; margin: 0;
  color: #DCEBFF; font-size: .66rem; letter-spacing: .18em; font-weight: 650; text-align: right;
}
.art-chip-bottom { bottom: 54px; }

/* Engine platforms bar */
.brands-bar { background: #fff; border-bottom: 1px solid var(--line); padding: 34px 0; text-align: center; }
.brands-title { font-size: .73rem; letter-spacing: .16em; text-transform: uppercase; color: var(--muted); font-weight: 700; margin-bottom: 20px; }
.brands-list { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; }
.brands-list span { border: 1px solid var(--line); background: var(--soft); border-radius: 8px; padding: 9px 22px; font-weight: 750; color: var(--ink-2); font-size: .95rem; letter-spacing: .02em; }
.brands-note { font-size: .85rem; color: var(--muted); margin: 18px auto 0; max-width: 62ch; }

/* Real product photographs inside cards */
.card-art { display: block; }
.card-art img, .product-row-card .card-art img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; display: block; }
.detail-art img { width: 100%; height: auto; display: block; border-radius: var(--r); }
.story-visual img { width: 100%; border-radius: var(--r); box-shadow: var(--shadow-lg); display: block; }

/* Factory test video */
.video-section { background: linear-gradient(135deg, #081726, #0E2947); color: #A9C0D8; padding: 88px 0; }
.video-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 52px; align-items: center; }
.video-frame { position: relative; border-radius: var(--r); overflow: hidden; background: #061525; border: 1px solid rgba(140, 190, 255, .16); box-shadow: var(--shadow-lg); }
.video-frame video { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; display: block; background: #000; }
.video-section h2 { color: #fff; }
.video-section .eyebrow { color: #7FB2FF; }
.video-note { font-size: .83rem; color: #8FA9C6; margin-top: 16px; }

/* Dark media strip */
.media-strip { background: radial-gradient(700px 320px at 85% 10%, #173E6C 0%, transparent 70%), linear-gradient(120deg, #0A1828, #102C4A); color: #B9CCE2; }
.media-strip-inner { display: grid; grid-template-columns: .85fr 1.15fr; gap: 56px; align-items: center; padding-top: 60px; padding-bottom: 60px; }
.media-strip-inner.reverse { grid-template-columns: 1.15fr .85fr; }
.media-strip-inner.reverse img { order: 2; }
.media-strip-inner.reverse > div { order: 1; }
.media-strip-inner img { width: 100%; height: 330px; object-fit: cover; border-radius: var(--r); box-shadow: var(--shadow-lg); }
.media-strip h2 { color: #fff; font-size: clamp(1.5rem, 2.6vw, 2.1rem); }
.media-strip .text-link { color: #FFD08A; }

/* Service network */
.coverage-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-bottom: 72px; }
.coverage-stats > div { background: var(--soft); border: 1px solid var(--line); border-radius: var(--r); padding: 28px; text-align: center; }
.coverage-stats strong { display: block; font-size: 2.2rem; color: var(--ink); font-weight: 800; letter-spacing: -.04em; line-height: 1.1; }
.coverage-stats span { font-size: .86rem; color: var(--muted); }
.coverage-head { margin-bottom: 44px; }
.region-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.region-card { background: #fff; border: 1px solid var(--line); border-radius: var(--r); padding: 28px 30px; }
.region-card h3 { color: var(--primary); font-size: 1.05rem; margin-bottom: 12px; }
.region-card p { font-size: .9rem; line-height: 1.9; margin: 0; }
.note-panel { display: flex; gap: 22px; align-items: flex-start; background: #fff; border: 1px solid var(--line); border-left: 4px solid var(--primary); border-radius: var(--r); padding: 30px; }
.note-icon { width: 34px; height: 34px; flex: none; border-radius: 50%; background: #E4F6EF; color: #0E9F8A; display: grid; place-items: center; font-weight: 800; }
.note-panel p { margin: 0; font-size: .94rem; }

/* Quality / testing */
.quality-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: start; }
.quality-grid > div > p:not(.eyebrow) { font-size: .96rem; }
.fact-card { background: var(--soft); border: 1px solid var(--line); border-radius: var(--r); padding: 30px; }
.fact-card .spec-table th { width: 42%; }
.quality-badges { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 22px; }
.quality-badges span { font-size: .76rem; font-weight: 650; background: #EAF1FF; color: var(--primary-dark); border: 1px solid #D2E0FF; padding: 6px 12px; border-radius: 20px; }
.disclaimer { font-size: .88rem; color: var(--muted); background: #fff; border: 1px dashed var(--line); border-radius: var(--r); padding: 22px 26px; margin: 0; }
.disclaimer strong { color: var(--ink); }

/* Shared inquiry form — copy-to-clipboard output */
.inquiry-output { margin-top: 22px; border-top: 1px solid var(--line); padding-top: 22px; }
.inquiry-output label { display: block; font-size: .84rem; font-weight: 650; color: var(--ink); margin-bottom: 8px; }
.inquiry-output textarea { width: 100%; font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: .82rem; line-height: 1.6; color: var(--ink); background: #F7FAFD; border: 1px solid #D8E2EE; border-radius: var(--r-sm); padding: 14px; resize: vertical; }
.output-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 14px; margin-top: 12px; }
.output-actions .btn { margin-top: 0; }
.btn-text { background: none; border: 0; padding: 6px 0; color: var(--accent, #2F6BFF); font: inherit; font-size: .86rem; font-weight: 650; text-decoration: underline; text-underline-offset: 3px; cursor: pointer; }
.btn-text:hover { color: #0B4BD8; }
.recipient-line { margin: 14px 0 0; font-size: .86rem; color: var(--ink); }
.recipient-line span { font-weight: 650; user-select: all; }
.contact-list li { padding: 10px 0; border-bottom: 1px solid var(--line); font-size: .92rem; }
.contact-list li:last-child { border-bottom: 0; }
.contact-list li > span:first-child { display: block; font-size: .72rem; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); font-weight: 650; }

@media (max-width: 1024px) {
  .primary-nav { gap: 13px; }
  .nav-cta { padding: 9px 14px; font-size: .85rem; }
  .brand-logo { height: 42px; max-width: 165px; }
}
@media (max-width: 860px) {
  .video-grid, .quality-grid, .media-strip-inner, .media-strip-inner.reverse { grid-template-columns: 1fr; gap: 32px; }
  .media-strip-inner.reverse img, .media-strip-inner.reverse > div { order: 0; }
  .media-strip-inner img { height: 280px; }
  .coverage-stats { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 620px) {
  .brand-logo { height: 38px; max-width: 150px; }
  .coverage-stats, .region-grid { grid-template-columns: 1fr; }
  .coverage-stats { margin-bottom: 48px; }
  .media-caption { display: none; }
  .art-chip-bottom { bottom: 22px; }
  .brands-list span { padding: 7px 14px; font-size: .85rem; }
  .video-section { padding: 60px 0; }
  .media-strip-inner img { height: 230px; }
  .note-panel { padding: 22px; gap: 14px; }
}