/* Valve.95MW.cn — industrial editorial system */
:root {
  --ink: #07111f;
  --ink-soft: #102238;
  --copper: #c49b67;
  --copper-light: #e1c89d;
  --paper: #f5f5f2;
  --mist: #e9eceb;
  --line: rgba(7, 17, 31, .14);
  --white: #fff;
  --muted: #66717d;
  --shadow: 0 24px 70px rgba(7, 17, 31, .13);
  --radius: 2px;
  --max: 1240px;
  --serif: Georgia, 'Times New Roman', serif;
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--sans); line-height: 1.65; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
.container { width: min(calc(100% - 48px), var(--max)); margin: 0 auto; }
.eyebrow { display: inline-flex; align-items: center; gap: 12px; color: var(--copper); font-size: .72rem; font-weight: 800; letter-spacing: .18em; text-transform: uppercase; }
.eyebrow::before { content: ''; width: 32px; height: 1px; background: currentColor; }
.display { margin: 20px 0 24px; font-family: var(--serif); font-size: clamp(2.8rem, 6vw, 6.7rem); font-weight: 400; letter-spacing: -.06em; line-height: .98; }
.display em { color: var(--copper); font-style: normal; }
h1, h2, h3, p { margin-top: 0; }
h2 { margin-bottom: 22px; font-family: var(--serif); font-size: clamp(2.2rem, 4vw, 4.3rem); font-weight: 400; letter-spacing: -.05em; line-height: 1.02; }
h3 { line-height: 1.2; }
.lead { max-width: 660px; color: rgba(255,255,255,.74); font-size: 1.1rem; }
.section { padding: 112px 0; }
.section--dark { background: var(--ink); color: var(--white); }
.section--soft { background: var(--mist); }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 40px; margin-bottom: 46px; }
.section-head > div:first-child { max-width: 650px; }
.section-head p { max-width: 480px; color: var(--muted); }
.section--dark .section-head p { color: rgba(255,255,255,.62); }
.topbar { background: var(--ink); color: rgba(255,255,255,.64); font-size: .7rem; letter-spacing: .13em; text-transform: uppercase; }
.topbar-inner { display: flex; justify-content: space-between; gap: 24px; min-height: 36px; align-items: center; }
.site-header { position: sticky; top: 0; z-index: 20; background: rgba(245,245,242,.95); border-bottom: 1px solid rgba(7,17,31,.1); backdrop-filter: blur(18px); }
.nav { display: flex; align-items: center; justify-content: space-between; min-height: 78px; gap: 32px; }
.brand { display: inline-flex; align-items: center; gap: 12px; min-width: 180px; }
.brand img { width: 42px; height: auto; }
.brand-copy { display: grid; gap: 1px; line-height: 1; }
.brand-copy strong { font-size: .95rem; letter-spacing: .16em; }
.brand-copy span { color: var(--muted); font-size: .58rem; letter-spacing: .2em; text-transform: uppercase; }
.nav-links { display: flex; align-items: center; gap: clamp(16px, 2.8vw, 40px); font-size: .75rem; font-weight: 750; letter-spacing: .08em; text-transform: uppercase; }
.nav-links a { position: relative; padding: 30px 0; color: var(--ink-soft); }
.nav-links a::after { position: absolute; right: 0; bottom: 22px; left: 0; height: 2px; background: var(--copper); content: ''; transform: scaleX(0); transform-origin: right; transition: transform .25s ease; }
.nav-links a:hover::after, .nav-links a[aria-current='page']::after { transform: scaleX(1); transform-origin: left; }
.menu-toggle { display: none; border: 1px solid var(--line); background: transparent; padding: 10px 12px; color: var(--ink); font: inherit; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 14px; min-height: 50px; padding: 0 22px; border: 1px solid var(--copper); background: var(--copper); color: var(--ink); font-size: .73rem; font-weight: 850; letter-spacing: .1em; text-transform: uppercase; transition: .25s ease; }
.btn:hover { background: transparent; color: var(--copper); }
.btn--ghost { border-color: rgba(255,255,255,.35); background: transparent; color: var(--white); }
.btn--ghost:hover { border-color: var(--copper); background: var(--copper); color: var(--ink); }
.btn--light { border-color: var(--white); background: var(--white); color: var(--ink); }
.btn--light:hover { border-color: var(--copper-light); background: var(--copper-light); color: var(--ink); }
.btn-arrow::after { content: '↗'; font-size: 1rem; }
.hero { position: relative; min-height: 690px; display: flex; align-items: end; overflow: hidden; background: var(--ink); color: var(--white); }
.hero::before { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(7,17,31,.96) 0%, rgba(7,17,31,.74) 45%, rgba(7,17,31,.14) 100%), url('/img/banner.jpg') center/cover; content: ''; }
.hero::after { position: absolute; inset: 0; background-image: linear-gradient(rgba(255,255,255,.06) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.06) 1px, transparent 1px); background-size: 72px 72px; content: ''; opacity: .23; pointer-events: none; }
.hero-content { position: relative; z-index: 1; width: min(100%, 920px); padding: 130px 0 88px; }
.hero h1 { max-width: 820px; animation: rise .8s ease both; }
.hero .lead { animation: rise .8s .12s ease both; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; animation: rise .8s .2s ease both; }
.hero-meta { position: absolute; right: 0; bottom: 52px; z-index: 1; display: flex; align-items: center; gap: 14px; color: rgba(255,255,255,.6); font-size: .68rem; letter-spacing: .16em; text-transform: uppercase; writing-mode: vertical-rl; }
.hero-meta::before { width: 1px; height: 72px; background: var(--copper); content: ''; }
@keyframes rise { from { opacity: 0; transform: translateY(18px); } to { opacity: 1; transform: translateY(0); } }
.intro-grid { display: grid; grid-template-columns: .7fr 1.3fr; gap: 10vw; align-items: start; }
.intro-grid p { color: var(--muted); font-size: 1.05rem; }
.stat-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 44px; border-top: 1px solid var(--line); padding-top: 26px; }
.stat strong { display: block; font-family: var(--serif); font-size: 2.7rem; font-weight: 400; line-height: 1; }
.stat span { display: block; margin-top: 8px; color: var(--muted); font-size: .73rem; letter-spacing: .08em; text-transform: uppercase; }
.split-visual { display: grid; grid-template-columns: .82fr 1.18fr; min-height: 600px; }
.split-visual .visual { min-height: 500px; background: url('/img/about.png') center/cover; }
.split-visual .copy { display: flex; align-items: center; padding: 80px clamp(34px, 8vw, 120px); background: var(--ink); color: var(--white); }
.copy-inner { max-width: 540px; }
.copy-inner p { color: rgba(255,255,255,.65); }
.numbered-list { display: grid; gap: 0; margin-top: 34px; border-top: 1px solid rgba(255,255,255,.16); }
.numbered-list > div { display: grid; grid-template-columns: 50px 1fr; gap: 18px; padding: 20px 0; border-bottom: 1px solid rgba(255,255,255,.16); }
.numbered-list b { color: var(--copper); font-size: .75rem; letter-spacing: .1em; }
.numbered-list h3 { margin-bottom: 5px; font-size: 1rem; }
.numbered-list p { margin-bottom: 0; font-size: .88rem; }
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.product-card { position: relative; overflow: hidden; background: var(--white); border: 1px solid rgba(7,17,31,.1); transition: transform .3s ease, box-shadow .3s ease; }
.product-card:hover { box-shadow: var(--shadow); transform: translateY(-5px); }
.product-card img { width: 100%; aspect-ratio: 3 / 2; object-fit: cover; transition: transform .45s ease; }
.product-card:hover img { transform: scale(1.04); }
.product-card-body { padding: 22px; }
.product-card-index { color: var(--copper); font-size: .68rem; font-weight: 800; letter-spacing: .16em; }
.product-card h3 { margin: 10px 0 16px; font-size: 1.16rem; }
.text-link { display: inline-flex; gap: 10px; align-items: center; color: var(--copper); font-size: .74rem; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.text-link::after { content: '↗'; transition: transform .2s ease; }
.text-link:hover::after { transform: translate(3px, -3px); }
.cases { display: grid; grid-template-columns: repeat(5, 1fr); gap: 8px; }
.case { position: relative; min-height: 380px; overflow: hidden; }
.case img { width: 100%; height: 100%; object-fit: cover; filter: saturate(.72); transition: transform .5s ease, filter .5s ease; }
.case:hover img { filter: saturate(1); transform: scale(1.05); }
.case::after { position: absolute; inset: 0; background: linear-gradient(transparent 35%, rgba(7,17,31,.9)); content: ''; }
.case-label { position: absolute; right: 20px; bottom: 20px; left: 20px; z-index: 1; color: var(--white); }
.case-label span { color: var(--copper-light); font-size: .65rem; letter-spacing: .15em; text-transform: uppercase; }
.case-label h3 { margin: 7px 0 0; font-size: 1.1rem; }
.cta-band { position: relative; overflow: hidden; padding: 76px 0; background: var(--copper); color: var(--ink); }
.cta-band::before { position: absolute; top: -90px; right: -90px; width: 320px; height: 320px; border: 1px solid rgba(7,17,31,.18); border-radius: 50%; box-shadow: 0 0 0 24px rgba(7,17,31,.04), 0 0 0 48px rgba(7,17,31,.04); content: ''; }
.cta-row { position: relative; z-index: 1; display: flex; align-items: center; justify-content: space-between; gap: 40px; }
.cta-row h2 { max-width: 720px; margin: 0; }
.cta-row .btn { border-color: var(--ink); background: var(--ink); color: var(--white); white-space: nowrap; }
.cta-row .btn:hover { background: transparent; color: var(--ink); }
.page-hero { position: relative; overflow: hidden; padding: 108px 0 92px; background: var(--ink); color: var(--white); }
.page-hero::after { position: absolute; right: 6%; bottom: -170px; width: 420px; height: 420px; border: 1px solid rgba(196,155,103,.4); border-radius: 50%; box-shadow: 0 0 0 36px rgba(196,155,103,.07), 0 0 0 72px rgba(196,155,103,.04); content: ''; }
.page-hero-inner { position: relative; z-index: 1; }
.page-hero h1 { max-width: 760px; margin-bottom: 0; }
.breadcrumb { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 32px; color: rgba(255,255,255,.5); font-size: .7rem; letter-spacing: .08em; text-transform: uppercase; }
.breadcrumb a { color: var(--copper-light); }
.prose { max-width: 780px; color: var(--muted); font-size: 1.05rem; }
.prose p { margin-bottom: 22px; }
.about-layout { display: grid; grid-template-columns: 1.05fr .95fr; gap: 9vw; align-items: center; }
.about-image { min-height: 630px; background: url('/img/about.png') center/cover; box-shadow: 24px 24px 0 var(--copper); }
.check-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; margin-top: 42px; background: var(--line); border: 1px solid var(--line); }
.check-item { min-height: 160px; padding: 25px; background: var(--paper); }
.check-item b { display: block; margin-bottom: 10px; color: var(--copper); font-size: 1.8rem; font-weight: 400; }
.check-item h3 { margin-bottom: 8px; font-size: 1rem; }
.check-item p { margin: 0; color: var(--muted); font-size: .88rem; }
.industry-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; margin-top: 34px; border-top: 1px solid rgba(255,255,255,.16); }
.industry-list div { padding: 20px 18px 20px 0; border-bottom: 1px solid rgba(255,255,255,.16); color: rgba(255,255,255,.72); font-size: .9rem; }
.industry-list div::before { margin-right: 10px; color: var(--copper); content: '—'; }
.cert-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.cert-card { padding: 20px; background: var(--white); border: 1px solid var(--line); }
.cert-card img { width: 100%; aspect-ratio: 1322 / 1870; object-fit: cover; }
.cert-card p { margin: 14px 0 0; color: var(--muted); font-size: .8rem; }
.faq-list { max-width: 900px; margin: 0 auto; }
details { border-top: 1px solid var(--line); }
details:last-child { border-bottom: 1px solid var(--line); }
summary { display: flex; justify-content: space-between; gap: 24px; padding: 24px 0; cursor: pointer; list-style: none; font-family: var(--serif); font-size: clamp(1.25rem, 2vw, 1.8rem); }
summary::-webkit-details-marker { display: none; }
summary::after { color: var(--copper); content: '+'; font-family: var(--sans); font-size: 1.5rem; }
details[open] summary::after { content: '−'; }
details p { max-width: 720px; padding: 0 60px 25px 0; color: var(--muted); }
.product-detail { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(42px, 8vw, 120px); align-items: start; }
.product-detail-visual { position: sticky; top: 120px; background: var(--white); border: 1px solid var(--line); }
.product-detail-visual img { width: 100%; aspect-ratio: 3 / 2; object-fit: cover; }
.product-tag { display: inline-block; margin-bottom: 12px; color: var(--copper); font-size: .7rem; font-weight: 800; letter-spacing: .18em; text-transform: uppercase; }
.detail-copy h1 { margin: 0 0 24px; font-family: var(--serif); font-size: clamp(2.7rem, 5vw, 5.3rem); font-weight: 400; letter-spacing: -.06em; line-height: .98; }
.detail-copy .intro { color: var(--muted); font-size: 1.05rem; }
.detail-points { display: grid; gap: 0; margin: 42px 0; border-top: 1px solid var(--line); }
.detail-point { display: grid; grid-template-columns: 35px 1fr; gap: 15px; padding: 19px 0; border-bottom: 1px solid var(--line); }
.detail-point b { color: var(--copper); }
.detail-point p { margin: 0; color: var(--muted); font-size: .9rem; }
.contact-layout { display: grid; grid-template-columns: .72fr 1.28fr; gap: 10vw; align-items: start; }
.contact-note { padding-top: 8px; }
.contact-note p { color: var(--muted); font-size: 1.05rem; }
.form { display: grid; gap: 18px; padding: clamp(25px, 5vw, 55px); background: var(--white); border: 1px solid var(--line); box-shadow: var(--shadow); }
.form-row { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.field { display: grid; gap: 8px; }
.field label { color: var(--ink-soft); font-size: .7rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.field input, .field textarea, .field select { width: 100%; border: 1px solid var(--line); border-radius: 0; outline: none; background: var(--paper); padding: 14px 15px; color: var(--ink); font: inherit; transition: border .2s ease, background .2s ease; }
.field input:focus, .field textarea:focus, .field select:focus { border-color: var(--copper); background: var(--white); }
.field textarea { min-height: 150px; resize: vertical; }
.form small { color: var(--muted); font-size: .75rem; }
.form-status { min-height: 24px; color: var(--copper); font-size: .86rem; }
.site-footer { padding: 62px 0 28px; background: var(--ink); color: var(--white); }
.footer-grid { display: grid; grid-template-columns: 1.4fr .8fr .8fr; gap: 70px; padding-bottom: 54px; border-bottom: 1px solid rgba(255,255,255,.15); }
.footer-brand p { max-width: 350px; margin-top: 22px; color: rgba(255,255,255,.55); font-size: .9rem; }
.footer-title { margin-bottom: 18px; color: var(--copper-light); font-size: .7rem; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
.footer-links { display: grid; gap: 11px; color: rgba(255,255,255,.7); font-size: .85rem; }
.footer-links a:hover { color: var(--copper-light); }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; padding-top: 22px; color: rgba(255,255,255,.4); font-size: .72rem; }
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .7s ease, transform .7s ease; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }
@media (max-width: 900px) {
  .nav-links { position: absolute; top: 100%; right: 24px; left: 24px; display: none; flex-direction: column; align-items: stretch; gap: 0; padding: 12px 20px; background: var(--white); box-shadow: var(--shadow); }
  .nav-links.is-open { display: flex; }
  .nav-links a { padding: 14px 0; border-bottom: 1px solid var(--line); }
  .nav-links a::after { bottom: 0; }
  .menu-toggle { display: block; }
  .intro-grid, .about-layout, .contact-layout { grid-template-columns: 1fr; gap: 46px; }
  .split-visual { grid-template-columns: 1fr; }
  .split-visual .visual { min-height: 420px; }
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .cases { grid-template-columns: repeat(3, 1fr); }
  .case { min-height: 280px; }
  .case:nth-child(4), .case:nth-child(5) { display: none; }
  .product-detail { grid-template-columns: 1fr; }
  .product-detail-visual { position: static; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 600px) {
  .container { width: min(calc(100% - 34px), var(--max)); }
  .topbar-inner { min-height: 30px; font-size: .58rem; }
  .topbar-inner span:last-child { display: none; }
  .nav { min-height: 68px; }
  .brand { min-width: 0; }
  .brand img { width: 34px; }
  .brand-copy strong { font-size: .78rem; }
  .brand-copy span { font-size: .48rem; }
  .hero { min-height: 600px; }
  .hero-content { padding: 96px 0 62px; }
  .hero-meta { display: none; }
  .section { padding: 76px 0; }
  .section-head, .cta-row { display: block; }
  .section-head p { margin-top: 20px; }
  .cta-row .btn { margin-top: 26px; }
  .stat-row { gap: 14px; }
  .stat strong { font-size: 2rem; }
  .stat span { font-size: .58rem; }
  .product-grid, .cert-grid, .check-grid { grid-template-columns: 1fr; }
  .cases { grid-template-columns: 1fr 1fr; }
  .case { min-height: 210px; }
  .case:nth-child(3) { display: none; }
  .industry-list { grid-template-columns: 1fr 1fr; }
  .about-image { min-height: 400px; box-shadow: 12px 12px 0 var(--copper); }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 34px; }
  .footer-brand { grid-column: auto; }
  .footer-bottom { display: block; }
  .footer-bottom span { display: block; margin-top: 8px; }
}
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; } .reveal { opacity: 1; transform: none; } }