@import url("https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@400;500;600;700&family=Oswald:wght@500;600&display=swap");

:root {
  --paper: #f5f4ef;
  --ink: #191a18;
  --muted: #686a64;
  --line: #d7d6cf;
  --white: #ffffff;
  --accent: #d9ff43;
  --deep-green: #263d34;
  --header-height: 82px;
  --container: 1240px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: var(--header-height); }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
body.menu-open { overflow: hidden; }
img { display: block; width: 100%; }
a { color: inherit; text-decoration: none; }
button { color: inherit; font: inherit; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { line-height: 1.18; letter-spacing: 0; }
h2 { margin-bottom: 0; font-size: 4.25rem; font-weight: 600; }

.container { width: min(calc(100% - 64px), var(--container)); margin-inline: auto; }
.section { padding: 120px 0; }
.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; }
.skip-link { position: fixed; left: 16px; top: -100px; z-index: 999; padding: 10px 16px; background: var(--accent); transition: top .2s; }
.skip-link:focus { top: 16px; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; }

.site-header { position: fixed; inset: 0 0 auto; z-index: 100; height: var(--header-height); color: var(--white); transition: background .25s, color .25s, box-shadow .25s; }
.site-header.scrolled { color: var(--ink); background: rgba(245, 244, 239, .96); box-shadow: 0 1px 0 rgba(25, 26, 24, .12); backdrop-filter: blur(12px); }
.header-inner { display: flex; height: 100%; align-items: center; justify-content: space-between; }
.brand { display: inline-flex; align-items: center; gap: 12px; flex: 0 0 auto; }
.brand-mark { display: grid; width: 43px; height: 43px; place-items: center; border: 1px solid currentColor; font: 600 17px/1 "Oswald", sans-serif; }
.brand-copy { display: grid; gap: 1px; }
.brand-copy strong { font-size: 16px; font-weight: 600; line-height: 1.2; }
.brand-copy span { font: 500 10px/1.2 "Oswald", sans-serif; letter-spacing: 1.8px; }
.site-nav { display: flex; align-items: center; gap: 36px; font-size: 14px; }
.site-nav > a:not(.nav-cta) { position: relative; }
.site-nav > a:not(.nav-cta)::after { position: absolute; right: 0; bottom: -6px; left: 0; height: 1px; background: currentColor; content: ""; transform: scaleX(0); transform-origin: right; transition: transform .2s; }
.site-nav > a:hover::after { transform: scaleX(1); transform-origin: left; }
.nav-cta { display: inline-flex; min-height: 42px; align-items: center; gap: 18px; padding: 0 18px; color: var(--ink); background: var(--accent); font-weight: 600; }
.menu-toggle { display: none; width: 44px; height: 44px; padding: 11px; border: 0; background: transparent; }
.menu-toggle > span:not(.sr-only) { display: block; height: 1px; margin: 5px 0; background: currentColor; transition: transform .2s, opacity .2s; }

.hero { position: relative; display: flex; min-height: min(880px, 100svh); align-items: flex-end; overflow: hidden; color: var(--white); background: #434944; }
.hero-media { position: absolute; inset: 0; background-image: url("../images/hero-studio.jpg"); background-position: center 42%; background-size: cover; transform: scale(1.01); }
.hero-overlay { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(12, 17, 14, .78) 0%, rgba(12, 17, 14, .25) 62%, rgba(12, 17, 14, .12) 100%), linear-gradient(0deg, rgba(12, 17, 14, .74) 0%, transparent 42%); }
.hero-content { position: relative; z-index: 1; padding-bottom: 145px; }
.eyebrow, .section-index { margin-bottom: 28px; color: var(--muted); font: 500 12px/1.4 "Oswald", "Noto Sans SC", sans-serif; letter-spacing: 2px; text-transform: uppercase; }
.light { color: rgba(255, 255, 255, .75); }
.hero h1 { max-width: 920px; margin-bottom: 26px; font-size: 6.5rem; font-weight: 600; overflow-wrap: anywhere; }
.hero-lead { max-width: 650px; margin-bottom: 38px; font-size: 1.35rem; line-height: 1.8; }
.hero-actions { display: flex; align-items: center; gap: 36px; }
.button { display: inline-flex; min-height: 52px; align-items: center; justify-content: space-between; gap: 36px; padding: 0 22px; border: 1px solid currentColor; font-weight: 600; transition: transform .2s, background .2s, color .2s; }
.button:hover { transform: translateY(-2px); }
.button-light { color: var(--ink); background: var(--white); border-color: var(--white); }
.text-link { display: inline-flex; align-items: center; gap: 14px; border-bottom: 1px solid currentColor; font-size: 14px; }
.hero-foot { position: absolute; z-index: 1; right: 0; bottom: 0; left: 0; display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid rgba(255,255,255,.28); }
.hero-foot span { padding: 22px 0; border-right: 1px solid rgba(255,255,255,.28); font-size: 13px; }
.hero-foot span:not(:first-child) { padding-left: 24px; }
.hero-foot span:last-child { border-right: 0; }

.intro-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10%; }
.intro-grid h2 { max-width: 610px; }
.intro-copy { padding-top: 54px; }
.intro-copy p { max-width: 590px; margin-bottom: 22px; color: #4f514d; font-size: 17px; }

.capabilities { background: var(--white); }
.section-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 80px; margin-bottom: 58px; }
.section-heading > p { max-width: 390px; margin-bottom: 8px; color: var(--muted); }
.section-heading.compact { margin-bottom: 40px; }
.product-grid { display: grid; grid-template-columns: 1.2fr .8fr; grid-template-rows: repeat(2, 320px); gap: 18px; }
.product-card { position: relative; overflow: hidden; background: #b8b9b4; }
.product-card-wide { grid-row: 1 / 3; }
.product-card img { height: 100%; object-fit: cover; transition: transform .6s cubic-bezier(.2,.7,.2,1); }
.product-card::after { position: absolute; inset: 35% 0 0; background: linear-gradient(transparent, rgba(9, 12, 10, .76)); content: ""; }
.product-card:hover img { transform: scale(1.035); }
.product-card-content { position: absolute; z-index: 1; right: 28px; bottom: 24px; left: 28px; display: grid; grid-template-columns: 38px 1fr; align-items: end; color: var(--white); }
.product-card-content span { grid-row: 1 / 3; align-self: start; padding-top: 4px; color: rgba(255,255,255,.7); font: 500 12px/1 "Oswald", sans-serif; }
.product-card-content h3 { margin-bottom: 8px; font-size: 28px; font-weight: 500; }
.product-card-content p { margin-bottom: 0; color: rgba(255,255,255,.75); font-size: 13px; }

.process-list { margin: 0; padding: 0; border-top: 1px solid var(--line); list-style: none; }
.process-list li { display: grid; grid-template-columns: 130px 1fr; padding: 36px 0; border-bottom: 1px solid var(--line); }
.step-number { color: var(--muted); font: 500 14px/1.4 "Oswald", sans-serif; }
.process-list li > div { display: grid; grid-template-columns: 240px 1fr; align-items: baseline; gap: 60px; }
.process-list h3 { margin: 0; font-size: 24px; font-weight: 500; }
.process-list p { max-width: 530px; margin: 0; color: var(--muted); }

.quality { display: grid; grid-template-columns: 1.05fr .95fr; padding: 0; background: var(--deep-green); color: var(--white); }
.quality-media { min-height: 720px; overflow: hidden; }
.quality-media img { height: 100%; object-fit: cover; }
.quality-content { display: flex; flex-direction: column; justify-content: center; padding: 90px max(8vw, 60px); }
.quality-content h2 { max-width: 680px; margin-bottom: 30px; font-size: 3.6rem; }
.quality-content > p:not(.section-index) { max-width: 590px; margin-bottom: 46px; color: rgba(255,255,255,.72); }
.quality-list { margin: 0; padding: 0; border-top: 1px solid rgba(255,255,255,.25); list-style: none; }
.quality-list li { display: grid; grid-template-columns: 48px 1fr; padding: 16px 0; border-bottom: 1px solid rgba(255,255,255,.25); }
.quality-list span { color: var(--accent); font: 500 12px/1.8 "Oswald", sans-serif; }

.about-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 10%; }
.about-heading { position: sticky; top: 130px; align-self: start; }
.about-heading h2 { max-width: 570px; font-size: 3.6rem; }
.large-copy { margin-bottom: 64px; font-size: 2rem; line-height: 1.55; }
.about-columns { display: grid; grid-template-columns: 1fr 1fr; gap: 36px; padding-top: 28px; border-top: 1px solid var(--line); }
.about-columns p { margin-bottom: 0; color: var(--muted); }

.contact { background: #171916; color: var(--white); }
.contact-grid { display: grid; grid-template-columns: 1.05fr .95fr; align-items: start; gap: 12%; }
.contact h2 { max-width: 700px; margin-bottom: 30px; font-size: 4.5rem; }
.contact-intro { max-width: 620px; color: rgba(255,255,255,.62); }
.contact-panel { padding-top: 48px; }
.contact-panel dl { margin: 0; border-top: 1px solid rgba(255,255,255,.24); }
.contact-panel dl div { display: grid; grid-template-columns: 110px 1fr; gap: 20px; padding: 18px 0; border-bottom: 1px solid rgba(255,255,255,.24); }
.contact-panel dt { color: rgba(255,255,255,.5); font-size: 13px; }
.contact-panel dd { margin: 0; }
.button-accent { color: var(--ink); background: var(--accent); border-color: var(--accent); }

.site-footer { padding: 54px 0 24px; color: var(--white); background: #0e0f0d; }
.footer-main { display: grid; grid-template-columns: 1fr 1fr auto; align-items: center; padding-bottom: 46px; }
.footer-main > p { margin: 0; color: rgba(255,255,255,.6); text-align: center; }
.back-top { display: grid; width: 48px; height: 48px; place-items: center; border: 1px solid rgba(255,255,255,.35); font-size: 20px; transition: background .2s, color .2s; }
.back-top:hover { color: var(--ink); background: var(--accent); }
.footer-bottom { display: flex; justify-content: space-between; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.14); color: rgba(255,255,255,.38); font-size: 12px; }
.filing-link { transition: color .2s; }
.filing-link:hover { color: var(--white); }

@media (max-width: 980px) {
  :root { --header-height: 70px; }
  .container { width: min(calc(100% - 40px), var(--container)); }
  .section { padding: 90px 0; }
  h2 { font-size: 3.1rem; }
  .menu-toggle { display: block; }
  .site-nav { position: fixed; inset: var(--header-height) 0 0; display: flex; visibility: hidden; flex-direction: column; align-items: stretch; gap: 0; padding: 36px 20px; color: var(--ink); background: var(--paper); opacity: 0; transform: translateY(-10px); transition: opacity .2s, transform .2s, visibility .2s; }
  .site-nav.open { visibility: visible; opacity: 1; transform: translateY(0); }
  .site-nav > a { padding: 18px 0; border-bottom: 1px solid var(--line); font-size: 20px; }
  .site-nav > a::after { display: none; }
  .site-nav .nav-cta { min-height: 54px; margin-top: 26px; padding: 0 18px; border-bottom: 0; font-size: 15px; }
  .menu-toggle[aria-expanded="true"] span:nth-of-type(2) { transform: translateY(6px) rotate(45deg); }
  .menu-toggle[aria-expanded="true"] span:nth-of-type(3) { opacity: 0; }
  .menu-toggle[aria-expanded="true"] span:nth-of-type(4) { transform: translateY(-6px) rotate(-45deg); }
  .hero { min-height: 760px; }
  .hero-content { padding-bottom: 150px; }
  .hero h1 { font-size: 4.5rem; }
  .quality-content h2, .about-heading h2 { font-size: 3.1rem; }
  .contact h2 { font-size: 3.8rem; }
  .hero-foot { grid-template-columns: repeat(2, 1fr); }
  .hero-foot span { padding: 13px 0; }
  .hero-foot span:nth-child(2) { border-right: 0; padding-left: 16px; }
  .hero-foot span:nth-child(n+3) { border-top: 1px solid rgba(255,255,255,.28); }
  .hero-foot span:nth-child(3) { padding-left: 0; }
  .hero-foot span:nth-child(4) { padding-left: 16px; }
  .intro-grid, .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 48px; }
  .intro-copy { padding-top: 0; }
  .product-grid { grid-template-columns: 1fr 1fr; grid-template-rows: 520px 300px; }
  .product-card-wide { grid-column: 1 / 3; grid-row: auto; }
  .quality { grid-template-columns: 1fr; }
  .quality-media { min-height: 520px; }
  .quality-content { padding: 80px 40px; }
  .about-heading { position: static; }
  .contact-panel { padding-top: 0; }
}

@media (max-width: 640px) {
  .container { width: min(calc(100% - 32px), var(--container)); }
  .section { padding: 72px 0; }
  h2 { font-size: 2.25rem; }
  .brand-copy strong { font-size: 14px; }
  .hero { min-height: 720px; }
  .hero-media { background-position: 62% center; }
  .hero-overlay { background: linear-gradient(90deg, rgba(12,17,14,.76), rgba(12,17,14,.3)), linear-gradient(0deg, rgba(12,17,14,.78), transparent 50%); }
  .hero-content { padding-bottom: 140px; }
  .hero h1 { font-size: 3rem; line-height: 1.28; word-break: break-all; }
  .hero h1, .hero-lead { max-width: 358px; }
  .hero-lead { font-size: 1rem; }
  .hero-actions { align-items: flex-start; flex-direction: column; gap: 22px; }
  .hero-foot span { font-size: 12px; }
  .section-heading { align-items: flex-start; flex-direction: column; gap: 26px; margin-bottom: 36px; }
  .product-grid { display: grid; grid-template-columns: 1fr; grid-template-rows: repeat(3, 390px); }
  .product-card-wide { grid-column: auto; }
  .product-card-content { right: 20px; bottom: 20px; left: 20px; }
  .process-list li { grid-template-columns: 48px 1fr; padding: 28px 0; }
  .process-list li > div { grid-template-columns: 1fr; gap: 12px; }
  .process-list h3 { font-size: 21px; }
  .quality-media { min-height: 380px; }
  .quality-content { padding: 68px 24px; }
  .quality-content h2 { font-size: 2.25rem; }
  .about-columns { grid-template-columns: 1fr; gap: 20px; }
  .large-copy { margin-bottom: 40px; }
  .contact h2 { font-size: 2.6rem; }
  .contact-panel dl div { grid-template-columns: 88px 1fr; }
  .footer-main { grid-template-columns: 1fr auto; gap: 34px; }
  .footer-main > p { grid-column: 1 / 3; grid-row: 2; text-align: left; }
  .footer-bottom { align-items: flex-start; flex-direction: column; gap: 6px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}