:root {
  --navy: #082f68;
  --ink: #10223e;
  --blue: #0e57a7;
  --orange: #f36a21;
  --sky: #edf5fc;
  --line: #d4deea;
  --muted: #66758b;
  --white: #fff;
  --max: 1240px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--white); font-family: "Source Han Sans SC", "Noto Sans CJK SC", "PingFang SC", "Microsoft YaHei", sans-serif; line-height: 1.75; font-feature-settings: "kern" 1; -webkit-font-smoothing: antialiased; }
img { display: block; width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.container { width: min(var(--max), calc(100% - 48px)); margin: 0 auto; }
.section { padding: 112px 0; }
.skip-link { position: fixed; z-index: 200; left: 16px; top: -60px; background: var(--orange); color: white; padding: 12px 18px; }
.skip-link:focus { top: 12px; }

.site-header { position: sticky; z-index: 100; top: 0; background: rgba(255,255,255,.96); border-bottom: 1px solid rgba(16,34,62,.1); backdrop-filter: blur(14px); }
.header-inner { min-height: 78px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 12px; min-width: 246px; }
.brand img { width: 46px; height: 46px; border-radius: 50%; object-fit: cover; }
.brand span { display: flex; flex-direction: column; line-height: 1.2; }
.brand strong { color: var(--navy); font-family: "Source Han Serif SC", "Noto Serif CJK SC", "Songti SC", STSong, serif; font-size: 16px; font-weight: 700; letter-spacing: .06em; }
.brand small { margin-top: 4px; color: var(--muted); font-size: 10px; }
.primary-nav { display: flex; align-items: center; gap: 28px; font-size: 13px; font-weight: 700; letter-spacing: .04em; }
.primary-nav > a:not(.button) { position: relative; padding: 28px 0; }
.primary-nav > a:not(.button)::after { content: ""; position: absolute; left: 0; right: 100%; bottom: 20px; height: 2px; background: var(--orange); transition: right .25s ease; }
.primary-nav > a:hover::after, .primary-nav > a.active::after { right: 0; }
.menu-toggle { display: none; }

.button { display: inline-flex; justify-content: center; align-items: center; min-height: 51px; padding: 0 25px; border: 0; border-radius: 3px; background: var(--orange); color: var(--white); font-weight: 700; letter-spacing: .05em; cursor: pointer; box-shadow: 0 7px 18px rgba(243,106,33,.18); transition: transform .2s, background .2s; }
.button:hover { transform: translateY(-2px); background: #d95715; }
.button-small { min-height: 42px; padding: 0 18px; }
.button-light { background: white; color: var(--navy); box-shadow: none; }
.button-light:hover { color: white; }
.text-link { font-weight: 800; color: var(--navy); border-bottom: 1px solid var(--navy); padding: 9px 0 7px; }
.text-link span { color: var(--orange); padding-left: 5px; }

.eyebrow { margin: 0 0 18px; color: var(--blue); font-size: 12px; font-weight: 800; letter-spacing: .18em; }
.eyebrow::before { content: ""; display: inline-block; width: 26px; height: 2px; margin: 0 10px 3px 0; background: var(--orange); }
.eyebrow.light { color: #accbe9; }
h1, h2, h3, p { margin-top: 0; }
h1, h2 { color: var(--navy); font-family: "Source Han Serif SC", "Noto Serif CJK SC", "Songti SC", STSong, SimSun, serif; font-weight: 700; letter-spacing: .015em; line-height: 1.12; }
h1 { max-width: 650px; margin-bottom: 26px; font-size: clamp(50px, 6vw, 86px); }
h1 em { color: var(--blue); font-style: normal; }
h2 { margin-bottom: 24px; font-size: clamp(38px, 4.5vw, 62px); }
h3 { color: var(--navy); }
.lead { font-size: 19px; line-height: 1.65; }

.hero-carousel { position: relative; height: max(620px, min(56.2vw, calc(100vh - 78px))); max-height: 940px; overflow: hidden; background: #eaf3fb; }
.carousel-track, .carousel-slide { position: absolute; inset: 0; }
.carousel-slide { opacity: 0; visibility: hidden; transform: scale(1.015); transition: opacity .65s ease, transform 1.1s ease, visibility .65s; }
.carousel-slide.is-active { opacity: 1; visibility: visible; transform: scale(1); z-index: 2; }
.banner-image { height: 100%; object-fit: cover; object-position: center; }
.campaign-slide .banner-image { object-position: center; }
.campaign-slide-shade { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(4,28,61,.24) 0%, rgba(4,35,75,.08) 39%, rgba(4,35,75,0) 68%); }
.campaign-slide-copy { position: absolute; z-index: 3; left: max(6vw, calc((100vw - 1240px)/2)); top: 50%; max-width: 700px; transform: translateY(-50%); color: white; }
.campaign-slide-copy > p { margin: 0 0 22px; color: #9fc9ed; font-size: 13px; font-weight: 800; letter-spacing: .2em; }
.campaign-slide-copy h2 { max-width: 760px; margin-bottom: 28px; color: white; font-size: clamp(48px,5vw,76px); line-height: 1.16; text-wrap: balance; }
.campaign-slide-copy > span { display: block; max-width: 680px; margin-bottom: 34px; color: #d4e3ef; font-size: 15px; font-weight: 700; letter-spacing: .04em; }
.campaign-slide-copy > div { display: flex; align-items: center; gap: 26px; }
.carousel-text-link { padding: 10px 0 7px; border-bottom: 1px solid white; font-weight: 900; }
.carousel-controls { position: absolute; z-index: 10; left: 50%; bottom: 22px; display: flex; min-height: 48px; padding: 6px 8px; align-items: center; gap: 12px; transform: translateX(-50%); border: 1px solid rgba(255,255,255,.55); background: rgba(5,39,82,.88); color: white; box-shadow: 0 9px 24px rgba(5,39,82,.2); backdrop-filter: blur(10px); }
.carousel-arrow { display: grid; width: 36px; height: 36px; padding: 8px; place-items: center; border: 0; background: transparent; color: white; cursor: pointer; }
.carousel-arrow:hover { background: rgba(255,255,255,.14); }
.carousel-arrow svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.carousel-dots { display: flex; align-items: center; gap: 7px; }
.carousel-dots button { width: 23px; height: 3px; padding: 0; border: 0; background: rgba(255,255,255,.35); cursor: pointer; transition: width .25s, background .25s; }
.carousel-dots button.is-active { width: 38px; background: var(--orange); }
.carousel-count { min-width: 58px; color: #a9c2da; font-size: 11px; font-weight: 800; }
.carousel-count b { color: white; font-size: 13px; }

.capacity { padding: 84px 0 78px; border-bottom: 1px solid var(--line); }
.section-intro.compact { display: flex; justify-content: space-between; align-items: end; gap: 40px; margin-bottom: 42px; }
.section-intro.compact h2 { max-width: 690px; margin: 0; font-size: clamp(34px, 4vw, 52px); }
.section-intro.compact .eyebrow { flex: 1; }
.capacity-grid { display: grid; grid-template-columns: repeat(6, 1fr); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.metric { min-height: 138px; padding: 27px 18px; border-right: 1px solid var(--line); }
.metric:last-child { border: 0; }
.metric span { display: block; color: var(--navy); font-size: clamp(28px, 3vw, 42px); font-weight: 900; letter-spacing: -.045em; line-height: 1; }
.metric span small { font-size: 15px; }
.metric .metric-icon { color: var(--orange); }
.metric p { margin: 15px 0 0; color: var(--muted); font-size: 12px; font-weight: 800; letter-spacing: .08em; }
.data-note { margin: 15px 0 0; color: #8a96a6; font-size: 11px; }

.factory { background: #f8fafc; }
.factory-heading { display: grid; grid-template-columns: 1.1fr .9fr; gap: 120px; align-items: end; margin-bottom: 54px; }
.factory-heading h2 { margin: 0; }
.factory-heading > p { max-width: 470px; color: var(--muted); font-size: 18px; line-height: 1.65; }
.factory-story { display: grid; grid-template-columns: 1.15fr .85fr; gap: 18px; }
.factory-story figure { position: relative; margin: 0; overflow: hidden; background: #dce5ee; }
.factory-story img { height: 100%; object-fit: cover; transition: transform .55s ease; }
.factory-story figure:hover img { transform: scale(1.025); }
.story-large { grid-row: span 1; height: 590px; }
.story-stack { display: grid; grid-template-rows: 1fr 1fr; gap: 18px; height: 590px; }
.production-line-photo img { object-position: center 62%; }
.story-wide { grid-column: 1 / -1; height: 330px; }
.factory-story figcaption { position: absolute; left: 0; bottom: 0; min-width: 250px; padding: 15px 20px; background: rgba(8,47,104,.93); color: white; font-size: 13px; font-weight: 800; letter-spacing: .06em; }
.factory-story figcaption span { color: #79b4e7; margin-right: 13px; }
.production-steps { display: grid; grid-template-columns: repeat(5, 1fr); margin-top: 22px; border-top: 1px solid #b7c5d3; border-bottom: 1px solid #b7c5d3; }
.production-steps span { padding: 18px 13px; border-right: 1px solid #b7c5d3; color: var(--navy); font-size: 12px; font-weight: 900; letter-spacing: .08em; text-align: center; }
.production-steps span:last-child { border: 0; }

.oem { overflow: hidden; background: var(--navy); color: white; }
.oem h2 { max-width: 700px; margin: 0; color: white; }
.oem-head { display: flex; align-items: end; justify-content: space-between; gap: 40px; margin-bottom: 60px; }
.process-list { counter-reset: steps; display: grid; grid-template-columns: repeat(6, 1fr); margin: 0; padding: 0; list-style: none; border-top: 1px solid rgba(255,255,255,.24); }
.process-list li { position: relative; min-height: 250px; padding: 30px 22px; border-right: 1px solid rgba(255,255,255,.2); }
.process-list li:last-child { border: 0; }
.process-list li::before { content: ""; position: absolute; top: -5px; left: 21px; width: 9px; height: 9px; background: var(--orange); }
.process-list span { color: #77b3e6; font-size: 12px; font-weight: 900; }
.process-list h3 { min-height: 52px; margin: 38px 0 16px; color: white; font-size: 18px; }
.process-list p { margin: 0; color: #b8cce0; font-size: 13px; }

.west-grid { display: grid; grid-template-columns: .82fr 1.18fr; gap: 90px; align-items: center; }
.west-copy h2 { max-width: 520px; }
.west-copy > .lead { color: var(--muted); }
.service-list { margin-top: 45px; border-top: 1px solid var(--line); }
.service-list > div { display: grid; grid-template-columns: 42px 1fr; padding: 23px 0; border-bottom: 1px solid var(--line); }
.service-list span { grid-row: span 2; color: var(--orange); font-size: 12px; font-weight: 900; }
.service-list h3 { margin: 0 0 5px; font-size: 16px; }
.service-list p { margin: 0; color: var(--muted); font-size: 13px; }
.west-gallery { position: relative; min-height: 650px; }
.west-main { position: absolute; right: 0; top: 0; width: 82%; height: 75%; object-fit: cover; }
.west-secondary { position: absolute; left: 0; bottom: 0; width: 53%; height: 43%; object-fit: cover; border: 10px solid white; }
.region-card { position: absolute; right: 0; bottom: 24px; width: 46%; padding: 29px; background: var(--orange); color: white; }
.region-card strong { display: block; margin-bottom: 18px; font-size: 25px; }
.region-card span { display: block; padding: 8px 0; border-top: 1px solid rgba(255,255,255,.45); font-size: 12px; font-weight: 800; letter-spacing: .08em; }
.evidence-strip { display: grid; grid-template-columns: repeat(3, 1fr); gap: 3px; max-width: 1600px; margin: 100px auto 0; }
.evidence-strip figure { position: relative; height: 265px; margin: 0; overflow: hidden; }
.evidence-strip img { height: 100%; object-fit: cover; }
.evidence-strip figcaption { position: absolute; right: 0; bottom: 0; padding: 11px 18px; background: white; color: var(--navy); font-size: 11px; font-weight: 900; letter-spacing: .08em; }

.capabilities { background: var(--sky); }
.capability-grid { display: grid; grid-template-columns: 1.07fr .93fr; gap: 78px; align-items: center; }
.range-collage { position: relative; }
.range-collage img { min-height: 550px; object-fit: cover; }
.range-collage span { position: absolute; left: -18px; bottom: -18px; max-width: 330px; padding: 22px 25px; background: var(--navy); color: white; font-family: "Source Han Serif SC", "Noto Serif CJK SC", "Songti SC", STSong, serif; font-size: 16px; font-weight: 700; letter-spacing: .08em; line-height: 1.65; }
.capability-copy > p:not(.eyebrow) { color: var(--muted); font-size: 18px; }
.product-thumbs { display: grid; grid-template-columns: repeat(4, 1fr); gap: 9px; margin-top: 36px; }
.product-thumbs img { aspect-ratio: .76; object-fit: cover; }

.proof-grid { display: grid; grid-template-columns: .75fr 1.25fr; gap: 100px; }
.proof-grid > div:first-child > p:last-child { max-width: 410px; color: var(--muted); }
.proof-list { border-top: 1px solid var(--line); }
.proof-list details { border-bottom: 1px solid var(--line); }
.proof-list summary { display: flex; justify-content: space-between; gap: 20px; padding: 23px 0; color: var(--navy); font-weight: 900; cursor: pointer; list-style: none; }
.proof-list summary::-webkit-details-marker { display: none; }
.proof-list summary span { color: var(--orange); font-size: 22px; transition: transform .25s; }
.proof-list details[open] summary span { transform: rotate(45deg); }
.proof-list details p { max-width: 650px; padding: 0 36px 20px 0; color: var(--muted); font-size: 14px; }
.verification-note { margin: 24px 0 0; padding: 15px 18px; border-left: 3px solid var(--orange); background: #f4f7fa; color: var(--muted); font-size: 12px; }

.contact { background: var(--navy); color: white; }
.contact-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 100px; }
.contact h2 { color: white; }
.contact-copy > p:not(.eyebrow) { max-width: 470px; color: #b8cce0; font-size: 17px; }
.contact address { max-width: 420px; margin-top: 55px; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.25); color: #d3e1ee; font-size: 13px; font-style: normal; }
.whatsapp-contact { display: inline-flex; align-items: center; gap: 14px; margin-top: 26px; padding: 14px 18px; border: 1px solid rgba(255,255,255,.25); color: white; transition: border-color .2s ease, background .2s ease, transform .2s ease; }
.whatsapp-contact:hover, .whatsapp-contact:focus-visible { border-color: #25d366; background: rgba(37,211,102,.1); transform: translateY(-2px); }
.whatsapp-mark { display: grid; width: 42px; height: 42px; place-items: center; border-radius: 50%; background: #25d366; color: #062f1a; font-family: Arial, sans-serif; font-size: 12px; font-weight: 900; letter-spacing: .04em; }
.whatsapp-contact > span:last-child { display: grid; grid-template-columns: auto auto; column-gap: 14px; align-items: baseline; }
.whatsapp-contact small { grid-column: 1 / -1; margin-bottom: 2px; color: #9fb5ca; font-size: 10px; font-weight: 800; letter-spacing: .1em; }
.whatsapp-contact strong { color: white; font-size: 16px; }
.whatsapp-contact b { color: #9ee7ba; font-size: 12px; font-weight: 700; }
.project-form { padding: 38px; background: white; color: var(--ink); }
.field-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.project-form label { display: block; margin-bottom: 18px; color: var(--navy); font-size: 11px; font-weight: 900; letter-spacing: .08em; }
.project-form input, .project-form textarea { width: 100%; margin-top: 7px; padding: 12px 2px; border: 0; border-bottom: 1px solid #b7c5d3; border-radius: 0; color: var(--ink); outline: none; resize: vertical; }
.project-form input:focus, .project-form textarea:focus { border-color: var(--orange); box-shadow: 0 1px 0 var(--orange); }
.form-note, .form-status { margin: 13px 0 0; color: var(--muted); font-size: 11px; }
.form-status { color: var(--blue); font-weight: 800; }

.site-footer { padding: 30px 0; background: #061f43; color: #aebed0; }
.footer-inner { display: flex; justify-content: space-between; align-items: center; gap: 30px; }
.footer-brand img { width: 42px; height: 42px; }
.footer-brand strong { color: white; }
.site-footer p, .site-footer a { margin: 0; font-size: 11px; }
.site-footer a { color: white; font-weight: 800; }

.reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .reveal { opacity: 1; transform: none; transition: none; } * { animation: none !important; transition: none !important; } }

@media (max-width: 1080px) {
  .primary-nav { gap: 17px; }
  .primary-nav > a { font-size: 11px; }
  .capacity-grid { grid-template-columns: repeat(3, 1fr); }
  .metric:nth-child(3) { border-right: 0; }
  .metric:nth-child(-n+3) { border-bottom: 1px solid var(--line); }
  .process-list { grid-template-columns: repeat(3, 1fr); }
  .process-list li:nth-child(3) { border-right: 0; }
  .process-list li:nth-child(-n+3) { border-bottom: 1px solid rgba(255,255,255,.2); }
}

@media (max-width: 820px) {
  .container { width: min(100% - 32px, var(--max)); }
  .section { padding: 82px 0; }
  .brand { min-width: 0; }
  .brand span { display: none; }
  .menu-toggle { display: flex; width: 45px; height: 44px; padding: 10px; border: 0; flex-direction: column; justify-content: center; gap: 5px; background: transparent; color: var(--navy); }
  .menu-toggle span { width: 100%; height: 2px; background: currentColor; }
  .menu-toggle b { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }
  .primary-nav { position: absolute; top: 78px; left: 0; right: 0; display: none; padding: 15px 24px 25px; flex-direction: column; align-items: stretch; gap: 0; background: white; border-bottom: 1px solid var(--line); box-shadow: 0 16px 30px rgba(8,47,104,.12); }
  .primary-nav.open { display: flex; }
  .primary-nav > a:not(.button) { padding: 13px 0; border-bottom: 1px solid #edf0f4; }
  .primary-nav > a:not(.button)::after { display: none; }
  .primary-nav .button { margin-top: 15px; }
  .hero-carousel { height: 720px; }
  .campaign-slide .banner-image { object-position: 70% center; }
  .campaign-slide-shade { background: linear-gradient(180deg, rgba(4,28,61,.18) 0%, rgba(4,28,61,.88) 67%, rgba(4,28,61,.98) 100%); }
  .campaign-slide-copy { left: 28px; right: 28px; top: auto; bottom: 110px; max-width: none; transform: none; }
  .campaign-slide-copy > p { margin-bottom: 15px; }
  .campaign-slide-copy h2 { margin-bottom: 20px; font-size: clamp(37px,8.5vw,54px); }
  .campaign-slide-copy > span { margin-bottom: 24px; font-size: 13px; }
  .campaign-slide-copy > div { align-items: flex-start; flex-direction: column; gap: 12px; }
  .carousel-controls { bottom: 16px; min-width: min(360px, calc(100% - 28px)); justify-content: center; }
  .section-intro.compact, .oem-head { display: block; }
  .section-intro.compact .eyebrow { margin-bottom: 18px; }
  .oem-head .button { margin-top: 24px; }
  .factory-heading, .west-grid, .capability-grid, .proof-grid, .contact-grid { grid-template-columns: 1fr; gap: 55px; }
  .factory-heading { gap: 25px; }
  .factory-story { grid-template-columns: 1fr; }
  .story-large, .story-stack { height: 470px; }
  .story-wide { grid-column: auto; height: 300px; }
  .production-steps { grid-template-columns: 1fr; }
  .production-steps span { border-right: 0; border-bottom: 1px solid #b7c5d3; text-align: left; }
  .production-steps span:last-child { border-bottom: 0; }
  .west-gallery { min-height: 570px; }
  .evidence-strip { margin-top: 70px; }
  .capability-copy { order: -1; }
  .contact-grid { gap: 45px; }
}

@media (max-width: 560px) {
  h1 { font-size: 48px; }
  h2 { font-size: 38px; }
  .hero-carousel { height: 680px; }
  .campaign-slide-copy { left: 18px; right: 18px; bottom: 100px; }
  .campaign-slide-copy h2 { font-size: 38px; }
  .carousel-controls { gap: 7px; }
  .carousel-dots button { width: 17px; }
  .carousel-dots button.is-active { width: 29px; }
  .carousel-count { min-width: 48px; }
  .capacity-grid { grid-template-columns: repeat(2, 1fr); }
  .metric:nth-child(3) { border-right: 1px solid var(--line); }
  .metric:nth-child(even) { border-right: 0; }
  .metric:nth-child(-n+4) { border-bottom: 1px solid var(--line); }
  .metric { min-height: 125px; padding: 23px 14px; }
  .metric span { font-size: 31px; }
  .factory-story figcaption { min-width: 0; width: 100%; }
  .story-large { height: 430px; }
  .story-stack { height: 500px; }
  .process-list { grid-template-columns: 1fr; }
  .process-list li { min-height: 0; padding: 28px 12px; border-right: 0; border-bottom: 1px solid rgba(255,255,255,.2); }
  .process-list li::before { left: 12px; }
  .process-list li h3 { min-height: 0; margin: 15px 0 8px; }
  .west-gallery { min-height: 470px; }
  .west-main { width: 92%; height: 65%; }
  .west-secondary { width: 60%; height: 38%; border-width: 6px; }
  .region-card { width: 54%; padding: 19px; }
  .evidence-strip { grid-template-columns: 1fr; }
  .evidence-strip figure { height: 220px; }
  .range-collage img { min-height: 420px; }
  .range-collage span { left: 0; bottom: 0; font-size: 12px; }
  .product-thumbs { grid-template-columns: repeat(2, 1fr); }
  .field-pair { grid-template-columns: 1fr; gap: 0; }
  .project-form { padding: 26px 20px; }
  .footer-inner { align-items: flex-start; flex-direction: column; }
  .footer-brand span { display: flex; }
}