:root {
  --ink: #08131d;
  --ink-2: #102331;
  --steel: #7e929f;
  --paper: #f3f5f2;
  --white: #ffffff;
  --line: rgba(8, 19, 29, .14);
  --copper: #d97832;
  --copper-2: #ff9a50;
  --cyan: #52c7d9;
  --success: #167a55;
  --danger: #a82f35;
  --radius: 12px;
  --shadow: 0 24px 70px rgba(3, 12, 18, .12);
  --max: 1240px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
body.nav-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
button { cursor: pointer; }
img { display: block; max-width: 100%; }
main { overflow: clip; }
.skip-link { position: fixed; left: 12px; top: -80px; z-index: 999; background: var(--white); padding: 12px 16px; border-radius: 6px; }
.skip-link:focus { top: 12px; }
.container { width: min(calc(100% - 40px), var(--max)); margin-inline: auto; }
.eyebrow { margin: 0 0 16px; color: var(--copper); font-size: 12px; font-weight: 800; letter-spacing: .16em; text-transform: uppercase; }
.section { padding: 96px 0; }
.section-dark { color: var(--white); background: var(--ink); }
.section-head { display: grid; grid-template-columns: minmax(0, 1fr) minmax(260px, 440px); align-items: end; gap: 40px; margin-bottom: 42px; }
.section-head h2, .page-hero h1 { margin: 0; font-size: clamp(34px, 5vw, 66px); line-height: .98; letter-spacing: -.045em; }
.section-head p { margin: 0; color: #526675; line-height: 1.8; }
.section-dark .section-head p { color: #a9bbc6; }
.button { min-height: 48px; display: inline-flex; align-items: center; justify-content: center; gap: 10px; padding: 0 20px; border: 1px solid transparent; border-radius: 6px; background: var(--copper); color: #fff; font-weight: 760; transition: transform .2s ease, background .2s ease, border .2s ease; }
.button:hover { transform: translateY(-2px); background: #ea8137; }
.button:focus-visible, .icon-button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible { outline: 3px solid rgba(82,199,217,.58); outline-offset: 3px; }
.button-outline { background: transparent; border-color: rgba(255,255,255,.3); }
.button-outline:hover { background: rgba(255,255,255,.08); }
.button-ink { background: var(--ink); }
.button-ink:hover { background: #173344; }

.site-header { position: fixed; inset: 0 0 auto; z-index: 40; color: white; transition: background .25s ease, box-shadow .25s ease; }
.site-header.scrolled, .site-header.solid { background: rgba(8,19,29,.94); box-shadow: 0 10px 40px rgba(0,0,0,.18); backdrop-filter: blur(16px); }
.header-inner { min-height: 82px; display: flex; align-items: center; gap: 34px; }
.brand { display: flex; align-items: center; gap: 13px; min-width: 250px; }
.brand-mark { width: 46px; height: 46px; display: grid; place-items: center; border: 1px solid rgba(255,255,255,.35); background: rgba(255,255,255,.06); font: 800 16px/1 Georgia, serif; letter-spacing: -.08em; }
.brand-copy { display: grid; gap: 1px; }
.brand-copy b { font-family: Georgia, "Times New Roman", serif; font-size: 17px; font-weight: 600; }
.brand-copy small { color: #a8bac6; font-size: 9px; letter-spacing: .13em; text-transform: uppercase; }
.desktop-nav { display: flex; align-items: center; gap: 28px; margin-inline-start: auto; }
.desktop-nav a { color: #c8d4db; font-size: 14px; font-weight: 700; }
.desktop-nav a:hover, .desktop-nav a[aria-current="page"] { color: white; }
.header-actions { display: flex; align-items: center; gap: 10px; }
.lang-toggle { min-height: 38px; padding: 0 12px; border: 1px solid rgba(255,255,255,.28); border-radius: 5px; background: transparent; color: #fff; font-weight: 800; }
.menu-toggle { display: none; width: 44px; height: 42px; border: 1px solid rgba(255,255,255,.25); background: transparent; color: white; border-radius: 5px; }
.mobile-nav { display: none; }

.hero { min-height: 790px; height: 92vh; color: white; background: #07131c; position: relative; display: grid; align-items: end; }
.hero-media { position: absolute; inset: 0; }
.hero-media img { width: 100%; height: 100%; object-fit: cover; object-position: center; }
.hero-media::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(5,14,22,.97) 0%, rgba(5,14,22,.88) 30%, rgba(5,14,22,.35) 64%, rgba(5,14,22,.24) 100%), linear-gradient(0deg, rgba(5,14,22,.88), transparent 48%); }
.hero-grid { position: relative; z-index: 2; display: grid; grid-template-columns: minmax(0, 710px) 1fr; gap: 64px; padding-top: 160px; padding-bottom: 74px; }
.hero h1 { margin: 0; font-size: clamp(54px, 7.4vw, 108px); line-height: .89; letter-spacing: -.06em; max-width: 760px; }
.hero h1 span { display: block; color: var(--copper-2); }
.hero-copy { margin: 28px 0 34px; max-width: 610px; color: #c1d0d8; font-size: 18px; line-height: 1.75; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.hero-aside { align-self: end; justify-self: end; width: min(100%, 320px); border-top: 1px solid rgba(255,255,255,.4); padding-top: 20px; }
.hero-aside p { margin: 0 0 22px; color: #bed0da; line-height: 1.7; }
.hero-aside strong { font-size: 13px; letter-spacing: .12em; text-transform: uppercase; }
.hero-meta { position: absolute; z-index: 3; right: 24px; top: 45%; writing-mode: vertical-rl; color: rgba(255,255,255,.58); font-size: 10px; letter-spacing: .16em; text-transform: uppercase; }

.trust-band { background: var(--white); border-bottom: 1px solid var(--line); }
.trust-grid { min-height: 112px; display: grid; grid-template-columns: 1.25fr repeat(3, 1fr); }
.trust-item { padding: 28px 28px; border-inline-start: 1px solid var(--line); display: grid; align-content: center; gap: 4px; }
.trust-item:first-child { border-inline-start: 0; padding-inline-start: 0; }
.trust-item b { font-size: 24px; letter-spacing: -.04em; }
.trust-item span { color: #657986; font-size: 13px; }

.capability-grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: 16px; }
.cap-card { min-height: 280px; padding: 30px; border: 1px solid var(--line); background: var(--white); border-radius: var(--radius); position: relative; overflow: hidden; }
.cap-card:nth-child(1), .cap-card:nth-child(4) { grid-column: span 7; }
.cap-card:nth-child(2), .cap-card:nth-child(3) { grid-column: span 5; }
.cap-card::after { content: attr(data-index); position: absolute; right: 18px; bottom: 4px; color: #edf0ed; font: 700 110px/1 Georgia, serif; }
.cap-card > * { position: relative; z-index: 1; }
.cap-card .cap-icon { width: 44px; height: 44px; display: grid; place-items: center; color: var(--copper); border: 1px solid rgba(217,120,50,.35); border-radius: 50%; margin-bottom: 54px; font-weight: 900; }
.cap-card h3 { margin: 0 0 12px; font-size: 27px; letter-spacing: -.035em; }
.cap-card p { margin: 0; color: #60727e; line-height: 1.7; max-width: 540px; }

.brand-marquee { border-block: 1px solid rgba(255,255,255,.12); padding: 20px 0; overflow: hidden; }
.brand-track { display: flex; width: max-content; gap: 12px; animation: brand-scroll 44s linear infinite; }
.brand-chip { padding: 12px 17px; border: 1px solid rgba(255,255,255,.16); border-radius: 999px; color: #c2d0d8; white-space: nowrap; font-size: 13px; }
@keyframes brand-scroll { to { transform: translateX(-50%); } }

.product-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.product-card { min-height: 330px; border: 1px solid rgba(255,255,255,.14); border-radius: var(--radius); padding: 26px; display: flex; flex-direction: column; background: linear-gradient(145deg, rgba(255,255,255,.07), rgba(255,255,255,.02)); transition: transform .25s ease, border-color .25s ease; }
.product-card:hover { transform: translateY(-5px); border-color: rgba(255,154,80,.6); }
.product-card .brand-tag { color: var(--copper-2); font-size: 11px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.product-card .model { margin: 26px 0 10px; font: 700 26px/1.1 "SFMono-Regular", Consolas, monospace; letter-spacing: -.04em; overflow-wrap: anywhere; }
.product-card h3 { margin: 0; color: #c7d4dc; font-size: 15px; line-height: 1.55; font-weight: 500; }
.product-card .product-foot { margin-top: auto; padding-top: 28px; display: flex; justify-content: space-between; align-items: center; border-top: 1px solid rgba(255,255,255,.1); color: #9bb0bc; font-size: 12px; }
.product-card .arrow { color: white; font-size: 22px; }

.process { display: grid; grid-template-columns: .8fr 1.2fr; gap: 80px; align-items: start; }
.process-intro { position: sticky; top: 120px; }
.process-intro h2 { margin: 0; font-size: clamp(38px, 5vw, 65px); line-height: .98; letter-spacing: -.05em; }
.process-steps { border-top: 1px solid var(--line); }
.process-step { display: grid; grid-template-columns: 64px 1fr; gap: 20px; padding: 30px 0; border-bottom: 1px solid var(--line); }
.process-step b { color: var(--copper); font: 700 15px/1 Consolas, monospace; }
.process-step h3 { margin: 0 0 8px; font-size: 22px; }
.process-step p { margin: 0; color: #61727d; line-height: 1.7; }

.address-band { background: var(--copper); color: white; }
.address-inner { min-height: 310px; display: grid; grid-template-columns: 1fr 1.35fr; gap: 60px; align-items: center; }
.address-band h2 { margin: 0; font-size: clamp(36px, 5vw, 68px); line-height: .98; letter-spacing: -.05em; }
.address-card { border-left: 1px solid rgba(255,255,255,.38); padding-left: 40px; }
.address-card p { margin: 0 0 18px; font-size: 18px; line-height: 1.7; }
.address-card small { color: rgba(255,255,255,.76); }

.site-footer { background: #050d13; color: white; padding: 70px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: 48px; }
.footer-brand p { color: #98adb9; line-height: 1.7; max-width: 420px; }
.footer-col h3 { margin: 0 0 18px; color: #738a97; font-size: 11px; letter-spacing: .14em; text-transform: uppercase; }
.footer-col a { display: block; margin: 0 0 13px; color: #ced9df; font-size: 14px; }
.footer-bottom { margin-top: 58px; padding-top: 24px; border-top: 1px solid rgba(255,255,255,.12); display: flex; justify-content: space-between; gap: 24px; color: #738a97; font-size: 12px; }

.page-hero { color: white; background: radial-gradient(circle at 78% 25%, rgba(82,199,217,.16), transparent 28%), var(--ink); padding: 180px 0 84px; }
.page-hero .container { display: grid; grid-template-columns: 1fr .55fr; gap: 60px; align-items: end; }
.page-hero p { margin: 0; color: #aac0cb; line-height: 1.8; font-size: 17px; }
.catalog-bar { position: sticky; top: 82px; z-index: 20; background: rgba(243,245,242,.95); backdrop-filter: blur(14px); border-bottom: 1px solid var(--line); }
.catalog-controls { min-height: 96px; display: grid; grid-template-columns: 1fr 220px 220px; gap: 12px; align-items: center; }
.field { width: 100%; min-height: 50px; border: 1px solid #c8d2d6; border-radius: 6px; background: white; padding: 0 15px; color: var(--ink); }
textarea.field { padding: 14px 15px; resize: vertical; }
.catalog-meta { display: flex; justify-content: space-between; gap: 18px; margin: 32px 0 18px; color: #60727e; font-size: 13px; }
.brand-directory { display: grid; gap: 12px; padding-bottom: 90px; }
.brand-row { background: white; border: 1px solid var(--line); border-radius: 8px; display: grid; grid-template-columns: 250px 1fr; overflow: hidden; }
.brand-id { padding: 24px; display: flex; align-items: center; gap: 18px; border-right: 1px solid var(--line); }
.brand-monogram { width: 50px; height: 50px; flex: 0 0 auto; display: grid; place-items: center; background: var(--ink); color: var(--copper-2); border-radius: 4px; font-weight: 850; }
.brand-id h2 { margin: 0; font-size: 19px; }
.brand-cats { padding: 20px 24px; display: flex; flex-wrap: wrap; gap: 8px; align-content: center; }
.cat-pill { border: 1px solid #d5dcdf; color: #4c6270; border-radius: 999px; padding: 8px 11px; font-size: 12px; background: #fafbfa; }
.empty-state { display: none; padding: 50px; text-align: center; background: white; border: 1px solid var(--line); border-radius: 8px; }

.content-grid { display: grid; grid-template-columns: .7fr 1.3fr; gap: 80px; }
.content-index { position: sticky; top: 120px; align-self: start; border-top: 3px solid var(--copper); padding-top: 20px; }
.content-index a { display: block; padding: 10px 0; color: #60727e; }
.prose section { padding-bottom: 58px; margin-bottom: 58px; border-bottom: 1px solid var(--line); }
.prose h2 { margin: 0 0 22px; font-size: clamp(30px, 4vw, 48px); line-height: 1.06; letter-spacing: -.04em; }
.prose h3 { margin: 28px 0 12px; font-size: 21px; }
.prose p, .prose li { color: #526873; line-height: 1.85; }
.prose ul { padding-left: 20px; }
.value-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin-top: 28px; }
.value-list article { background: white; border: 1px solid var(--line); padding: 24px; border-radius: 8px; }
.value-list b { display: block; margin-bottom: 8px; }

.contact-layout { display: grid; grid-template-columns: .72fr 1.28fr; gap: 70px; align-items: start; }
.contact-panel { background: var(--ink); color: white; border-radius: 10px; padding: 34px; position: sticky; top: 120px; }
.contact-panel h2 { margin: 0 0 18px; font-size: 34px; letter-spacing: -.04em; }
.contact-panel p { color: #a9bdc8; line-height: 1.75; }
.contact-detail { border-top: 1px solid rgba(255,255,255,.13); margin-top: 26px; padding-top: 22px; }
.contact-detail small { color: var(--copper-2); display: block; margin-bottom: 10px; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.contact-form { background: white; border: 1px solid var(--line); border-radius: 10px; padding: 34px; }
.contact-form h2 { margin: 0 0 8px; font-size: 34px; }
.form-intro { margin: 0 0 28px; color: #60727e; line-height: 1.7; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-group { display: grid; gap: 8px; }
.form-group.full { grid-column: 1 / -1; }
.form-group label { font-size: 13px; font-weight: 760; }
.form-note { color: #72828b; font-size: 12px; line-height: 1.6; }
.check-row { display: flex; align-items: flex-start; gap: 10px; }
.check-row input { margin-top: 4px; }
.honeypot { position: absolute !important; left: -9999px !important; }
.form-status { min-height: 24px; color: var(--danger); font-size: 13px; }

.legal-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.legal-card { background: white; border: 1px solid var(--line); padding: 30px; border-radius: 8px; }
.legal-card h2 { margin-top: 0; }
.notice { border-left: 4px solid var(--copper); padding: 18px 20px; background: #fff2e7; color: #5c483a; line-height: 1.7; }

[lang="zh-CN"] .brand-copy b, [lang="zh-CN"] h1, [lang="zh-CN"] h2, [lang="zh-CN"] h3 { letter-spacing: 0; }
[lang="zh-CN"] .eyebrow { letter-spacing: .08em; }
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .65s ease, transform .65s ease; }
.reveal.visible { opacity: 1; transform: none; }

@media (max-width: 980px) {
  .desktop-nav, .header-actions .button { display: none; }
  .header-inner { min-height: 72px; }
  .menu-toggle { display: block; margin-inline-start: auto; }
  .mobile-nav { display: none; position: fixed; inset: 72px 0 0; background: var(--ink); padding: 30px 20px; }
  .nav-open .mobile-nav { display: grid; align-content: start; gap: 12px; }
  .mobile-nav a { padding: 16px 4px; border-bottom: 1px solid rgba(255,255,255,.12); color: white; font-size: 21px; }
  .mobile-nav .lang-toggle { margin-top: 12px; }
  .hero { min-height: 730px; height: auto; }
  .hero-grid { grid-template-columns: 1fr; padding-top: 170px; }
  .hero-aside { justify-self: start; width: 100%; max-width: 590px; }
  .trust-grid { grid-template-columns: repeat(2, 1fr); }
  .trust-item { border-bottom: 1px solid var(--line); }
  .cap-card:nth-child(n) { grid-column: span 6; }
  .product-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .process, .content-grid, .contact-layout { grid-template-columns: 1fr; gap: 50px; }
  .process-intro, .content-index, .contact-panel { position: static; }
  .address-inner, .page-hero .container { grid-template-columns: 1fr; padding-block: 70px; }
  .address-card { border-left: 0; border-top: 1px solid rgba(255,255,255,.38); padding: 26px 0 0; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .catalog-bar { top: 72px; }
  .catalog-controls { grid-template-columns: 1fr 1fr; padding: 16px 0; }
  .catalog-controls .search-field { grid-column: 1 / -1; }
  .brand-row { grid-template-columns: 200px 1fr; }
}

@media (max-width: 640px) {
  .container { width: min(calc(100% - 28px), var(--max)); }
  .section { padding: 68px 0; }
  .section-head { grid-template-columns: 1fr; gap: 18px; }
  .brand { min-width: 0; }
  .brand-copy small { display: none; }
  .brand-mark { width: 40px; height: 40px; }
  .hero-media::after { background: linear-gradient(90deg, rgba(5,14,22,.96), rgba(5,14,22,.58)), linear-gradient(0deg, rgba(5,14,22,.9), transparent 60%); }
  .hero { min-height: 760px; }
  .hero-grid { padding-top: 140px; padding-bottom: 50px; }
  .hero h1 { font-size: 52px; }
  .hero-copy { font-size: 16px; }
  .hero-meta { display: none; }
  .hero-actions .button { width: 100%; }
  .trust-grid { grid-template-columns: 1fr; }
  .trust-item { border-inline-start: 0; padding-inline: 0; }
  .capability-grid { grid-template-columns: 1fr; }
  .cap-card:nth-child(n) { grid-column: 1; min-height: 245px; }
  .cap-card .cap-icon { margin-bottom: 36px; }
  .product-grid { grid-template-columns: 1fr; }
  .process-step { grid-template-columns: 42px 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; }
  .page-hero { padding: 132px 0 60px; }
  .catalog-controls { grid-template-columns: 1fr; }
  .catalog-controls .search-field { grid-column: auto; }
  .brand-row { grid-template-columns: 1fr; }
  .brand-id { border-right: 0; border-bottom: 1px solid var(--line); }
  .catalog-meta { flex-direction: column; }
  .value-list, .form-grid, .legal-cards { grid-template-columns: 1fr; }
  .form-group.full { grid-column: auto; }
  .contact-form, .contact-panel { padding: 24px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}