:root {
  --ink: #11120f;
  --muted: #666a65;
  --paper: #ffffff;
  --soft: #f0f1ef;
  --soft-green: #c8cdc7;
  --deep: #142017;
  --accent: #f2db4d;
  --line: #d7d9d5;
  --gutter: clamp(22px, 4vw, 64px);
  --max: 1440px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: Inter, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif; font-size: 16px; line-height: 1.65; }
body.menu-open { overflow: hidden; }
img { display: block; width: 100%; }
a { color: inherit; text-decoration: none; }
button { color: inherit; 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; }

.site-header { position: sticky; z-index: 100; top: 0; height: 92px; padding: 0 var(--gutter); display: flex; align-items: center; justify-content: space-between; background: rgba(255,255,255,.96); transition: height .25s, box-shadow .25s; }
.site-header.is-compact { height: 72px; box-shadow: 0 1px var(--line); backdrop-filter: blur(14px); }
.brand { display: grid; gap: 0; line-height: 1; }
.brand strong { font-family: Impact, "Arial Black", sans-serif; font-size: 22px; letter-spacing: -.03em; }
.brand small { margin-top: 7px; color: #53564f; font-size: 9px; font-weight: 700; letter-spacing: .22em; }
nav { display: flex; align-items: center; gap: clamp(23px, 2.6vw, 43px); font-size: 14px; }
nav a { position: relative; }
nav a:not(.language-link)::after { content: ""; position: absolute; right: 100%; bottom: -8px; left: 0; height: 1px; background: var(--ink); transition: right .25s ease; }
nav a:hover::after, nav a:focus-visible::after { right: 0; }
.language-link { min-width: 64px; padding: 10px 14px; border-radius: 8px; background: var(--soft); text-align: center; }
.menu-toggle { display: none; border: 0; background: transparent; padding: 9px; }
.menu-toggle span { display: block; width: 25px; height: 1px; margin: 6px 0; background: currentColor; transition: transform .25s, opacity .2s; }

.hero { position: relative; height: calc(100svh - 92px); min-height: 670px; margin: 0 10px 72px; overflow: hidden; background: #222; color: #fff; }
.hero-slide { position: absolute; inset: 0; opacity: 0; visibility: hidden; transition: opacity .8s ease, visibility .8s; }
.hero-slide.is-active { opacity: 1; visibility: visible; }
.hero-slide > img { height: 100%; object-fit: cover; transform: scale(1.035); transition: transform 7s ease; }
.hero-slide.is-active > img { transform: scale(1); }
.hero-slide:nth-child(2) > img { object-position: center 64%; }
.hero-slide:nth-child(3) > img { object-position: center 45%; }
.hero-overlay { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(0,0,0,.71) 0%, rgba(0,0,0,.2) 54%, rgba(0,0,0,.03) 100%); }
.hero-copy { position: absolute; z-index: 2; left: clamp(30px, 4vw, 68px); bottom: clamp(68px, 10vh, 108px); width: min(720px, 78vw); }
.hero-copy > p { margin: 0 0 18px; font-size: 12px; font-weight: 700; letter-spacing: .15em; text-transform: uppercase; }
.hero-copy h1, .hero-copy h2 { margin: 0; max-width: 760px; font-size: clamp(52px, 6.2vw, 90px); font-weight: 450; letter-spacing: -.055em; line-height: 1.02; }
.hero-copy > span { display: block; max-width: 650px; margin-top: 22px; color: rgba(255,255,255,.88); font-size: 18px; line-height: 1.75; }
.hero-actions { display: flex; gap: 10px; margin-top: 29px; flex-wrap: wrap; }
.light-button { min-height: 48px; padding: 0 18px; display: inline-flex; align-items: center; gap: 32px; border-radius: 7px; color: #111; background: #fff; font-size: 14px; }
.light-button b { font-size: 18px; font-weight: 400; transition: transform .2s; }
.light-button:hover b { transform: translate(3px,-3px); }
.hero-controls { position: absolute; z-index: 5; right: 34px; bottom: 30px; display: flex; align-items: center; gap: 18px; }
.hero-arrow { width: 36px; height: 36px; padding: 0; border: 1px solid rgba(255,255,255,.5); border-radius: 50%; color: white; background: rgba(0,0,0,.08); cursor: pointer; }
.hero-dots { display: flex; gap: 8px; }
.hero-dots button { width: 8px; height: 8px; padding: 0; border: 1px solid #fff; border-radius: 50%; background: transparent; cursor: pointer; }
.hero-dots button.is-active { border-color: var(--accent); background: var(--accent); }

.metrics { max-width: var(--max); margin: 0 auto; padding: 16px var(--gutter) 118px; display: grid; grid-template-columns: repeat(4,1fr); }
.metrics div { min-height: 120px; padding: 12px 28px; display: flex; flex-direction: column; justify-content: flex-end; border-left: 1px solid var(--line); }
.metrics div:last-child { border-right: 1px solid var(--line); }
.metrics strong { font-size: clamp(30px, 3vw, 46px); font-weight: 500; letter-spacing: -.04em; line-height: 1; }
.metrics sup { font-size: .45em; }
.metrics span { margin-top: 14px; color: var(--muted); font-size: 13px; }

.section { max-width: var(--max); margin: 0 auto; padding: 120px var(--gutter); }
.section-intro { margin-bottom: 65px; display: grid; grid-template-columns: 1.35fr .65fr; column-gap: 10vw; align-items: end; }
.section-label { margin: 0 0 26px; color: var(--muted); font-size: 12px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; }
.section-intro .section-label { grid-column: 1 / -1; }
.section h2, .quality-strip h2, .about h2, .contact h2 { margin: 0; font-size: clamp(42px, 5.15vw, 72px); font-weight: 430; letter-spacing: -.055em; line-height: 1.08; }
.section-description { margin: 0 0 8px; color: var(--muted); font-size: 16px; line-height: 1.8; }

.products { padding-top: 70px; }
.product-stage { display: grid; grid-template-columns: 1.15fr .85fr; grid-auto-rows: 430px; gap: 12px; }
.product-panel { position: relative; overflow: hidden; background: #c8cbc6; }
.product-panel > img { height: 100%; object-fit: cover; transition: transform .7s ease; }
.product-panel:hover > img { transform: scale(1.025); }
.product-panel:nth-child(2) > img { object-position: center 25%; }
.product-door { grid-row: span 2; }
.product-cabinet { grid-column: 1 / -1; height: 580px; }
.image-wash { position: absolute; inset: 0; background: linear-gradient(to top, rgba(0,0,0,.68), transparent 55%); }
.panel-copy { position: absolute; z-index: 2; left: 34px; bottom: 30px; color: #fff; }
.panel-copy p { margin: 0 0 9px; font-size: 11px; letter-spacing: .1em; text-transform: uppercase; }
.panel-copy h3 { margin: 0 0 6px; font-size: clamp(31px, 3.2vw, 48px); font-weight: 450; letter-spacing: -.04em; line-height: 1.1; }
.panel-copy span { color: rgba(255,255,255,.78); font-size: 14px; }
.product-panel > a { position: absolute; z-index: 3; top: 24px; right: 24px; min-height: 46px; padding: 0 16px; display: flex; align-items: center; gap: 28px; border-radius: 7px; background: rgba(255,255,255,.9); font-size: 14px; }
.product-panel > a b { font-size: 18px; font-weight: 400; }

.capabilities { display: grid; grid-template-columns: 1.08fr .92fr; gap: clamp(48px, 7vw, 110px); align-items: start; }
.capability-visual { display: grid; grid-template-columns: 1fr .58fr; gap: 12px; }
.capability-visual figure { position: relative; min-height: 340px; margin: 0; overflow: hidden; }
.capability-visual .capability-main { min-height: 720px; grid-row: span 2; }
.capability-visual figure:nth-child(2) { margin-top: 210px; }
.capability-visual img { position: absolute; inset: 0; height: 100%; object-fit: cover; }
.capability-visual figcaption { position: absolute; left: 18px; bottom: 16px; padding: 7px 10px; border-radius: 5px; color: #fff; background: rgba(17,18,15,.72); font-size: 11px; }
.capability-copy { position: sticky; top: 110px; padding-top: 30px; }
.capability-copy > p:not(.section-label) { max-width: 590px; margin: 30px 0 42px; color: var(--muted); font-size: 16px; line-height: 1.85; }
.service-flow { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.service-flow li { min-height: 60px; display: grid; grid-template-columns: 46px 1fr auto; align-items: center; border-bottom: 1px solid var(--line); }
.service-flow b { color: #8e938c; font-size: 11px; }
.service-flow span { font-size: 15px; }
.service-flow em { color: #8e938c; font-size: 11px; font-style: normal; text-transform: uppercase; }

.quality-strip { max-width: calc(var(--max) - 2 * var(--gutter)); margin: 10px auto 120px; min-height: 620px; display: grid; grid-template-columns: 1.15fr .85fr; background: var(--soft-green); overflow: hidden; }
.quality-copy { padding: clamp(46px, 7vw, 100px); display: flex; flex-direction: column; justify-content: center; }
.quality-copy > p:not(.section-label) { max-width: 570px; margin: 28px 0; color: #4c524c; font-size: 16px; line-height: 1.8; }
.certificate-number { margin-top: 15px; padding-top: 20px; border-top: 1px solid rgba(17,18,15,.24); display: flex; justify-content: space-between; gap: 20px; }
.certificate-number span { color: var(--muted); font-size: 12px; }
.certificate-number strong { font-size: 14px; font-weight: 600; }
.quality-image { padding: 70px; display: grid; place-items: center; background: #e2e5e0; }
.quality-image img { max-width: 360px; max-height: 480px; object-fit: contain; filter: drop-shadow(0 18px 26px rgba(0,0,0,.12)); }

.projects { max-width: none; padding-left: max(var(--gutter), calc((100vw - var(--max))/2 + var(--gutter))); padding-right: 0; background: var(--soft); overflow: hidden; }
.project-intro { max-width: calc(var(--max) - 2 * var(--gutter)); padding-right: var(--gutter); }
.project-scroll { padding: 0 var(--gutter) 18px 0; display: grid; grid-auto-flow: column; grid-auto-columns: min(76vw, 780px); gap: 14px; overflow-x: auto; overscroll-behavior-inline: contain; scroll-snap-type: x mandatory; scrollbar-color: #8d918b transparent; }
.project-scroll article { position: relative; height: 560px; overflow: hidden; background: #bbb; scroll-snap-align: start; }
.project-scroll img { height: 100%; object-fit: cover; transition: transform .7s; }
.project-scroll article:hover img { transform: scale(1.02); }
.project-scroll article::after { content: ""; position: absolute; inset: 45% 0 0; background: linear-gradient(transparent, rgba(0,0,0,.72)); }
.project-scroll article > div { position: absolute; z-index: 2; right: 30px; bottom: 27px; left: 30px; color: #fff; }
.project-scroll span { font-size: 12px; letter-spacing: .1em; text-transform: uppercase; }
.project-scroll h3 { margin: 7px 0 0; font-size: clamp(28px, 3vw, 42px); font-weight: 450; letter-spacing: -.04em; line-height: 1.1; }
.project-more { max-width: 910px; margin: 36px var(--gutter) 0 auto; color: var(--muted); font-size: 13px; text-align: right; }

.about { padding: 140px max(var(--gutter), calc((100vw - var(--max))/2 + var(--gutter))); display: grid; grid-template-columns: .86fr 1.14fr; gap: 9vw; color: #fff; background: var(--deep); }
.about-copy > p:not(.section-label) { max-width: 620px; margin: 27px 0 0; color: rgba(255,255,255,.7); font-size: 16px; line-height: 1.85; }
.about .section-label { color: rgba(255,255,255,.52); }
.about-images { display: grid; grid-template-columns: 1fr .7fr; gap: 12px; align-items: end; }
.about-images img { height: 600px; object-fit: cover; }
.about-images img:last-child { height: 400px; }

.contact { padding: 130px max(var(--gutter), calc((100vw - var(--max))/2 + var(--gutter))); display: grid; grid-template-columns: 1fr 1fr; gap: 8vw; background: var(--accent); }
.contact .section-label { color: #404631; }
.contact-list { border-top: 1px solid rgba(17,18,15,.3); }
.contact-list a { min-height: 105px; display: grid; grid-template-columns: 120px 1fr auto; align-items: center; gap: 16px; border-bottom: 1px solid rgba(17,18,15,.3); }
.contact-list span { color: #4a5136; font-size: 12px; }
.contact-list strong { font-size: 16px; font-weight: 500; }
.contact-list b { font-size: 24px; font-weight: 400; transition: transform .2s; }
.contact-list a:hover b { transform: translate(3px,-3px); }

footer { position: relative; padding: 60px var(--gutter) 30px; display: grid; grid-template-columns: 1fr 1fr; gap: 70px; color: #fff; background: #111; }
.footer-brand { display: flex; flex-direction: column; gap: 11px; }
.footer-brand strong { font-family: Impact, "Arial Black", sans-serif; font-size: 32px; letter-spacing: -.03em; }
.footer-brand span, footer p { color: rgba(255,255,255,.5); font-size: 12px; }
.footer-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 18px 34px; font-size: 13px; }
footer p { grid-column: 1 / -1; margin: 0; padding-top: 24px; border-top: 1px solid rgba(255,255,255,.15); }
.back-top { position: absolute; right: var(--gutter); bottom: 23px; width: 36px; height: 36px; border: 1px solid rgba(255,255,255,.3); border-radius: 50%; display: grid; place-items: center; }
.icp-link { display: inline-block; margin-left: 20px; padding-right: 40px; }
.icp-link:hover { color: #fff; text-decoration: underline; }

@media (max-width: 960px) {
  .site-header { height: 72px; }
  .menu-toggle { position: relative; z-index: 102; display: block; }
  .menu-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .menu-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  nav { position: fixed; z-index: 101; inset: 0; padding: 110px 28px 40px; flex-direction: column; align-items: flex-start; gap: 23px; background: #fff; font-size: 26px; transform: translateX(100%); transition: transform .3s ease; }
  nav.is-open { transform: translateX(0); }
  .language-link { margin: 12px 0 0; font-size: 16px; }
  .hero { height: calc(100svh - 72px); margin-inline: 0; min-height: 690px; }
  .metrics { grid-template-columns: repeat(2,1fr); }
  .metrics div:nth-child(3) { border-top: 1px solid var(--line); }
  .metrics div:nth-child(4) { border-top: 1px solid var(--line); }
  .section-intro, .capabilities, .about, .contact { grid-template-columns: 1fr; }
  .section-description { max-width: 640px; margin-top: 26px; }
  .capability-copy { position: static; }
  .quality-strip { margin-inline: 24px; grid-template-columns: 1fr 1fr; }
  .project-scroll { grid-auto-columns: 82vw; }
  .about-images { max-width: 760px; }
}

@media (max-width: 640px) {
  :root { --gutter: 20px; }
  .brand strong { font-size: 20px; }
  .hero-copy { left: 22px; bottom: 92px; width: calc(100% - 44px); }
  .hero-copy h1, .hero-copy h2 { font-size: clamp(45px, 13vw, 62px); }
  .hero-copy > span { font-size: 15px; line-height: 1.7; }
  .hero-actions { align-items: flex-start; flex-direction: column; }
  .light-button { min-height: 44px; }
  .hero-controls { right: 18px; bottom: 24px; }
  .metrics { padding-bottom: 75px; }
  .metrics div { min-height: 112px; padding: 14px 16px; }
  .metrics div:nth-child(odd) { border-left: 0; }
  .metrics div:last-child { border-right: 0; }
  .section { padding-block: 82px; }
  .section h2, .quality-strip h2, .about h2, .contact h2 { font-size: 42px; }
  .section-intro { margin-bottom: 42px; }
  .product-stage { display: block; }
  .product-panel, .product-door, .product-cabinet { height: 440px; margin-bottom: 10px; }
  .panel-copy { left: 22px; bottom: 22px; }
  .panel-copy span { display: block; max-width: 250px; }
  .product-panel > a { top: 14px; right: 14px; }
  .capability-visual { grid-template-columns: 1fr; }
  .capability-visual .capability-main { min-height: 470px; }
  .capability-visual figure:nth-child(2) { min-height: 270px; margin-top: 0; }
  .service-flow li { grid-template-columns: 40px 1fr; }
  .service-flow em { display: none; }
  .quality-strip { margin: 0 0 82px; grid-template-columns: 1fr; }
  .quality-copy { padding: 72px 22px; }
  .quality-image { padding: 50px; }
  .project-scroll { grid-auto-columns: 88vw; }
  .project-scroll article { height: 430px; }
  .project-more { margin-right: var(--gutter); text-align: left; }
  .about { padding-block: 86px; }
  .about-images img { height: 400px; }
  .about-images img:last-child { height: 270px; }
  .contact { padding-block: 82px; }
  .contact-list a { grid-template-columns: 1fr auto; padding: 21px 0; }
  .contact-list span { grid-column: 1 / -1; }
  .contact-list strong { font-size: 15px; }
  footer { grid-template-columns: 1fr; gap: 38px; }
  .footer-links { justify-content: flex-start; }
}

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