:root {
  --navy: #071827;
  --navy-2: #0d2a3e;
  --blue: #1598d6;
  --orange: #f18b2d;
  --red: #e53d50;
  --mist: #f2f7fa;
  --white: #ffffff;
  --ink: #112433;
  --muted: #5d6f7b;
  --line: rgba(7, 24, 39, .14);
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: "Avenir Next", Avenir, "Segoe UI", Arial, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, textarea, select { font: inherit; }
:focus-visible { outline: 3px solid rgba(241, 139, 45, .7); outline-offset: 3px; }
.wrap { width: min(calc(100% - 40px), var(--max)); margin: 0 auto; }
.skip-link { position: fixed; left: 18px; top: -80px; z-index: 100; background: var(--white); padding: 10px 16px; }
.skip-link:focus { top: 18px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  color: var(--white);
  background: rgba(7, 24, 39, .94);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255,255,255,.1);
}
.nav { min-height: 78px; display: flex; align-items: center; gap: 34px; }
.brand { display: flex; align-items: center; gap: 12px; margin-right: auto; }
.brand img { width: 110px; height: 30px; object-fit: contain; filter: brightness(0) invert(1); }
.brand span { font-weight: 700; letter-spacing: .02em; white-space: nowrap; }
.nav-links { display: flex; align-items: center; gap: 26px; font-size: .95rem; }
.nav-links a { opacity: .78; }
.nav-links a:hover, .nav-links a[aria-current="page"] { opacity: 1; }
.nav-cta, .button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 20px;
  border: 1px solid transparent;
  background: var(--orange);
  color: #1a1a1a;
  font-weight: 750;
  cursor: pointer;
}
.button.secondary { background: transparent; color: var(--white); border-color: rgba(255,255,255,.38); }
.button.dark { background: var(--navy); color: var(--white); }
.menu-toggle { display: none; border: 0; background: transparent; color: white; padding: 8px; }

.hero {
  min-height: 720px;
  color: var(--white);
  background: var(--navy);
  position: relative;
  overflow: hidden;
  isolation: isolate;
}
.hero-media { position: absolute; inset: 0 0 0 42%; z-index: -2; }
.hero-media img { width: 100%; height: 100%; object-fit: cover; object-position: center; }
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(90deg, var(--navy) 0%, rgba(7,24,39,.96) 37%, rgba(7,24,39,.45) 68%, rgba(7,24,39,.15) 100%);
}
.hero-grid { min-height: 720px; display: grid; grid-template-columns: 58% 42%; align-items: center; }
.hero-copy { padding: 74px 0 112px; }
.kicker { color: #8bd7f7; font-size: .95rem; font-weight: 700; margin: 0 0 24px; }
.hero h1 { max-width: 760px; margin: 0; font-size: clamp(3.1rem, 6.4vw, 6.5rem); line-height: .95; letter-spacing: -.055em; }
.hero p { max-width: 620px; margin: 30px 0; color: rgba(255,255,255,.78); font-size: 1.1rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.hero-note { margin-top: 30px; max-width: 520px; font-size: .82rem; color: rgba(255,255,255,.56); }

.spectrum { margin-top: -58px; position: relative; z-index: 3; }
.spectrum-inner { display: grid; grid-template-columns: repeat(6, 1fr); background: var(--white); box-shadow: 0 22px 70px rgba(7,24,39,.18); }
.wave { min-height: 116px; padding: 22px 18px; border-right: 1px solid var(--line); position: relative; }
.wave:last-child { border-right: 0; }
.wave::before { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 5px; background: var(--wave); }
.wave strong { display: block; font-size: 1.55rem; letter-spacing: -.04em; }
.wave span { color: var(--muted); font-size: .8rem; }

.section { padding: 112px 0; }
.section.compact { padding: 82px 0; }
.section.mist { background: var(--mist); }
.section.navy { background: var(--navy); color: var(--white); }
.section-head { display: grid; grid-template-columns: minmax(0, .8fr) minmax(300px, 1.2fr); gap: 56px; align-items: end; margin-bottom: 56px; }
.section-head h2, .page-title h1 { margin: 0; font-size: clamp(2.4rem, 4.7vw, 4.7rem); line-height: 1.02; letter-spacing: -.045em; }
.section-head p { margin: 0; color: var(--muted); max-width: 680px; }
.navy .section-head p { color: rgba(255,255,255,.65); }
.section-label { color: var(--blue); font-weight: 750; margin: 0 0 15px; }

.product-grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: 22px; }
.product-card { background: var(--white); border: 1px solid var(--line); min-height: 420px; position: relative; overflow: hidden; }
.product-card:nth-child(1), .product-card:nth-child(4) { grid-column: span 7; }
.product-card:nth-child(2), .product-card:nth-child(3) { grid-column: span 5; }
.product-card img { width: 100%; height: 280px; object-fit: cover; background: #eef2f4; }
.product-card:nth-child(1) img, .product-card:nth-child(4) img { height: 360px; }
.product-copy { padding: 26px 28px 30px; }
.product-copy h3 { margin: 0 0 8px; font-size: 1.35rem; line-height: 1.2; }
.product-copy p { color: var(--muted); margin: 0 0 18px; }
.text-link { color: var(--blue); font-weight: 750; }

.application-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid rgba(255,255,255,.18); }
.application { padding: 48px 34px 54px 0; border-right: 1px solid rgba(255,255,255,.18); }
.application + .application { padding-left: 34px; }
.application:last-child { border-right: 0; }
.application h3 { font-size: 1.7rem; margin: 0 0 15px; }
.application p { color: rgba(255,255,255,.66); }
.application .line { display: block; width: 48px; height: 4px; background: var(--accent); margin-bottom: 34px; }

.split { display: grid; grid-template-columns: 1fr 1fr; align-items: stretch; }
.split-media img { width: 100%; height: 100%; min-height: 620px; object-fit: cover; }
.split-copy { padding: 82px max(40px, calc((100vw - var(--max))/2)); padding-left: 72px; background: var(--mist); }
.split-copy h2 { font-size: clamp(2.4rem, 4vw, 4rem); line-height: 1.04; letter-spacing: -.04em; margin: 0 0 26px; }
.steps { margin: 38px 0; border-top: 1px solid var(--line); }
.step { display: grid; grid-template-columns: 88px 1fr; gap: 24px; padding: 22px 0; border-bottom: 1px solid var(--line); }
.step strong { color: var(--blue); }
.step p { margin: 0; }

.quality-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 54px; align-items: center; }
.quality-image { position: relative; }
.quality-image img { width: 100%; min-height: 520px; object-fit: cover; }
.quality-stamp { position: absolute; right: -18px; bottom: 28px; background: var(--orange); color: #17212a; width: 170px; height: 170px; display: grid; place-items: center; text-align: center; font-weight: 800; padding: 18px; }
.check-list { list-style: none; padding: 0; margin: 32px 0; }
.check-list li { padding: 16px 0 16px 32px; border-bottom: 1px solid var(--line); position: relative; }
.check-list li::before { content: ""; position: absolute; left: 0; top: 24px; width: 12px; height: 12px; background: var(--blue); }

.facts { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid rgba(255,255,255,.16); }
.fact { padding: 34px 28px; border-right: 1px solid rgba(255,255,255,.16); }
.fact:last-child { border-right: 0; }
.fact strong { display: block; color: #8bd7f7; font-size: 1.8rem; }
.fact span { color: rgba(255,255,255,.62); font-size: .9rem; }

.cta-band { padding: 70px 0; background: var(--orange); color: #17212a; }
.cta-inner { display: grid; grid-template-columns: 1fr auto; gap: 30px; align-items: center; }
.cta-inner h2 { margin: 0; font-size: clamp(2rem, 4vw, 4rem); line-height: 1; letter-spacing: -.04em; }

.page-title { color: var(--white); background: var(--navy); padding: 100px 0 82px; position: relative; overflow: hidden; }
.page-title::after { content: "630  660  810  830  850  940"; position: absolute; right: -30px; bottom: -25px; color: rgba(255,255,255,.05); font-size: 5.8rem; font-weight: 800; white-space: nowrap; }
.page-title p { max-width: 680px; color: rgba(255,255,255,.7); font-size: 1.12rem; }
.content-grid { display: grid; grid-template-columns: 280px 1fr; gap: 70px; }
.side-nav { align-self: start; position: sticky; top: 110px; border-top: 4px solid var(--blue); }
.side-nav a { display: block; padding: 16px 0; border-bottom: 1px solid var(--line); color: var(--muted); }
.article h2 { font-size: 2.2rem; line-height: 1.1; margin: 0 0 22px; letter-spacing: -.03em; }
.article h3 { margin-top: 34px; }
.article p, .article li { color: #435864; }
.article section { padding-bottom: 64px; scroll-margin-top: 110px; }
.data-table { width: 100%; border-collapse: collapse; margin: 28px 0; }
.data-table th, .data-table td { text-align: left; padding: 16px; border-bottom: 1px solid var(--line); vertical-align: top; }
.data-table th { background: var(--mist); }
.notice { padding: 22px 24px; border-left: 5px solid var(--orange); background: #fff8ee; color: #5d4934; }
.media-strip { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.media-strip img { width: 100%; aspect-ratio: 4/3; object-fit: cover; }

.contact-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 70px; }
.contact-card { background: var(--navy); color: var(--white); padding: 44px; }
.contact-card p, .contact-card a { color: rgba(255,255,255,.72); }
.contact-row { padding: 18px 0; border-bottom: 1px solid rgba(255,255,255,.16); }
.contact-row strong { display: block; color: #8bd7f7; }
.form { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.field { display: grid; gap: 8px; }
.field.full { grid-column: 1 / -1; }
.field input, .field textarea, .field select { width: 100%; padding: 14px 16px; border: 1px solid var(--line); background: var(--white); }
.field textarea { min-height: 160px; resize: vertical; }
.form-status { grid-column: 1 / -1; color: var(--muted); min-height: 24px; }
.honeypot { position: absolute !important; left: -10000px !important; width: 1px !important; height: 1px !important; overflow: hidden !important; }
.form button:disabled { cursor: wait; opacity: .65; }

.blog-title::after { content: "INSIGHT  OEM  QUALITY"; }
.blog-feature { display: grid; grid-template-columns: 1.05fr .95fr; border: 1px solid var(--line); background: var(--white); }
.blog-feature-media { min-height: 480px; overflow: hidden; background: var(--mist); }
.blog-feature-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.blog-feature:hover .blog-feature-media img { transform: scale(1.025); }
.blog-feature-copy { padding: clamp(34px, 6vw, 72px); align-self: center; }
.blog-feature-copy h2 { margin: 20px 0; font-size: clamp(2.1rem, 4vw, 4rem); line-height: 1.02; letter-spacing: -.045em; }
.blog-feature-copy p { color: var(--muted); margin-bottom: 28px; }
.blog-archive { margin-top: 88px; display: grid; grid-template-columns: .7fr 1.3fr; gap: 70px; align-items: start; }
.blog-archive h2 { margin: 0; font-size: clamp(2.2rem, 4vw, 4rem); line-height: 1.05; letter-spacing: -.04em; }
.blog-card { display: grid; grid-template-columns: 240px 1fr; gap: 30px; padding: 28px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.blog-card img { width: 100%; height: 100%; min-height: 190px; object-fit: cover; }
.blog-card h3 { margin: 14px 0 10px; font-size: 1.6rem; line-height: 1.15; }
.blog-card p { margin: 0 0 16px; color: var(--muted); }
.article-meta { display: flex; flex-wrap: wrap; gap: 10px 20px; color: var(--muted); font-size: .82rem; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; }
.article-meta span:first-child { color: var(--blue); }
.article-meta.light { color: rgba(255,255,255,.6); }
.article-meta.light span:first-child { color: #8bd7f7; }
.blog-roadmap { margin-top: 100px; display: grid; grid-template-columns: .7fr 1.3fr; gap: 70px; }
.blog-roadmap h2 { margin: 0; font-size: clamp(2.2rem, 4vw, 4rem); line-height: 1.05; letter-spacing: -.04em; }
.topic-grid { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--line); }
.topic-grid article { padding: 28px 26px 28px 0; border-bottom: 1px solid var(--line); }
.topic-grid article:nth-child(even) { padding-left: 26px; border-left: 1px solid var(--line); }
.topic-grid strong { color: var(--navy); font-size: 1.1rem; }
.topic-grid p { color: var(--muted); margin: 8px 0 0; font-size: .94rem; }

.article-hero { background: var(--navy); color: var(--white); padding: 72px 0; }
.article-hero-grid { display: grid; grid-template-columns: 1.08fr .92fr; gap: 72px; align-items: center; }
.article-hero h1 { margin: 24px 0; font-size: clamp(3rem, 5.8vw, 6rem); line-height: .97; letter-spacing: -.055em; }
.article-hero p { max-width: 700px; color: rgba(255,255,255,.7); font-size: 1.12rem; }
.article-hero img { width: 100%; aspect-ratio: 4 / 5; object-fit: cover; }
.article-back { display: inline-block; margin-bottom: 34px; color: #8bd7f7; font-weight: 700; }
.article-layout { display: grid; grid-template-columns: 250px minmax(0, 780px); gap: 80px; justify-content: center; }
.article-toc { align-self: start; position: sticky; top: 110px; border-top: 4px solid var(--blue); }
.article-toc strong { display: block; padding: 20px 0 10px; }
.article-toc a { display: block; padding: 10px 0; color: var(--muted); font-size: .9rem; border-bottom: 1px solid var(--line); }
.blog-article { font-family: Georgia, "Times New Roman", serif; font-size: 1.08rem; }
.blog-article h2 { font-family: "Avenir Next", Avenir, "Segoe UI", Arial, sans-serif; margin: 0 0 24px; font-size: clamp(2rem, 3.5vw, 3.25rem); line-height: 1.08; letter-spacing: -.035em; }
.blog-article p, .blog-article li { color: #3e515d; }
.blog-article section { padding: 62px 0; border-bottom: 1px solid var(--line); scroll-margin-top: 100px; }
.blog-article .section-label, .key-box strong, .blog-article .button, .blog-article table { font-family: "Avenir Next", Avenir, "Segoe UI", Arial, sans-serif; }
.article-lead { margin: 0 0 36px; font-size: 1.35rem; line-height: 1.65; color: var(--ink) !important; }
.key-box { padding: 28px 30px; background: var(--mist); border-left: 5px solid var(--blue); }
.key-box p { margin: 10px 0 0; }
.article-image-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 30px; }
.article-image-row img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.article-figure { margin: 36px 0 18px; }
.article-figure img { width: 100%; height: auto; border: 1px solid var(--line); background: var(--white); }
.article-figure figcaption { margin-top: 12px; color: var(--muted); font-family: "Avenir Next", Avenir, "Segoe UI", Arial, sans-serif; font-size: .86rem; line-height: 1.5; }
.blog-article h3 { font-family: "Avenir Next", Avenir, "Segoe UI", Arial, sans-serif; margin: 34px 0 14px; font-size: 1.35rem; line-height: 1.2; }
.blog-article a.text-link { font-family: "Avenir Next", Avenir, "Segoe UI", Arial, sans-serif; }
.number-list { padding-left: 24px; }
.number-list li { padding: 10px 0; border-bottom: 1px solid var(--line); }

.site-footer { background: #04111c; color: var(--white); padding: 68px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr 1.2fr; gap: 48px; }
.footer-grid h3 { font-size: 1rem; margin: 0 0 18px; }
.footer-grid p, .footer-grid a { color: rgba(255,255,255,.58); font-size: .92rem; }
.footer-grid a { display: block; padding: 4px 0; }
.footer-brand img { width: 120px; filter: brightness(0) invert(1); margin-bottom: 20px; }
.legal { margin-top: 48px; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.12); color: rgba(255,255,255,.45); font-size: .8rem; }
.floating { position: fixed; right: 20px; bottom: 20px; z-index: 40; display: grid; gap: 10px; }
.floating a { width: 52px; height: 52px; border-radius: 50%; display: grid; place-items: center; color: white; font-weight: 800; box-shadow: 0 8px 24px rgba(7,24,39,.25); }
.floating .mail { background: var(--red); }
.floating .wa { background: #24c66c; }

@media (max-width: 940px) {
  .menu-toggle { display: block; }
  .nav-links { display: none; position: absolute; left: 0; right: 0; top: 78px; padding: 20px; background: var(--navy); flex-direction: column; align-items: stretch; }
  .nav-links.open { display: flex; }
  .nav-cta { display: none; }
  .hero-media { inset: 0; opacity: .52; }
  .hero::after { background: linear-gradient(90deg, rgba(7,24,39,.96), rgba(7,24,39,.62)); }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-copy { max-width: 760px; }
  .spectrum-inner { grid-template-columns: repeat(3, 1fr); }
  .wave:nth-child(3) { border-right: 0; }
  .wave:nth-child(-n+3) { border-bottom: 1px solid var(--line); }
  .section-head, .quality-grid, .contact-grid { grid-template-columns: 1fr; }
  .split { grid-template-columns: 1fr; }
  .split-copy { padding: 70px 34px; }
  .application-grid { grid-template-columns: 1fr; }
  .application, .application + .application { padding: 34px 0; border-right: 0; border-bottom: 1px solid rgba(255,255,255,.18); }
  .facts { grid-template-columns: 1fr 1fr; }
  .fact:nth-child(2) { border-right: 0; }
  .fact:nth-child(-n+2) { border-bottom: 1px solid rgba(255,255,255,.16); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .content-grid { grid-template-columns: 1fr; gap: 40px; }
  .side-nav { position: static; display: flex; flex-wrap: wrap; gap: 12px 22px; }
  .blog-feature, .blog-archive, .blog-roadmap, .article-hero-grid, .article-layout { grid-template-columns: 1fr; }
  .blog-feature-media { min-height: 380px; }
  .article-hero img { max-height: 540px; aspect-ratio: 16 / 9; }
  .article-toc { position: static; }
}

@media (max-width: 640px) {
  .wrap { width: min(calc(100% - 28px), var(--max)); }
  .nav { min-height: 68px; }
  .brand span { display: none; }
  .nav-links { top: 68px; }
  .hero, .hero-grid { min-height: 650px; }
  .hero h1 { font-size: clamp(2.8rem, 15vw, 4.5rem); }
  .hero-copy { padding-top: 58px; }
  .spectrum { margin-top: -34px; }
  .spectrum-inner { grid-template-columns: repeat(2, 1fr); }
  .wave { min-height: 96px; }
  .wave:nth-child(2n) { border-right: 0; }
  .wave:nth-child(3) { border-right: 1px solid var(--line); }
  .wave:nth-child(-n+4) { border-bottom: 1px solid var(--line); }
  .section { padding: 78px 0; }
  .section-head { gap: 22px; margin-bottom: 36px; }
  .product-grid { display: block; }
  .product-card { margin-bottom: 18px; min-height: 0; }
  .product-card img, .product-card:nth-child(1) img, .product-card:nth-child(4) img { height: 260px; }
  .facts, .footer-grid, .form, .media-strip { grid-template-columns: 1fr; }
  .fact { border-right: 0; border-bottom: 1px solid rgba(255,255,255,.16); }
  .cta-inner { grid-template-columns: 1fr; }
  .quality-stamp { width: 130px; height: 130px; right: 0; }
  .page-title { padding: 70px 0 58px; }
  .page-title::after { display: none; }
  .contact-card { padding: 30px; }
  .field { grid-column: 1 / -1; }
  .blog-feature-media { min-height: 280px; }
  .blog-feature-copy { padding: 30px 24px 36px; }
  .blog-roadmap { margin-top: 70px; gap: 30px; }
  .blog-archive { margin-top: 70px; gap: 30px; }
  .blog-card { grid-template-columns: 1fr; }
  .blog-card img { height: 230px; }
  .topic-grid, .article-image-row { grid-template-columns: 1fr; }
  .topic-grid article, .topic-grid article:nth-child(even) { padding: 24px 0; border-left: 0; }
  .article-hero { padding: 52px 0; }
  .article-hero-grid { gap: 36px; }
  .article-layout { gap: 44px; }
  .blog-article { font-size: 1rem; }
}

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