:root {
  --ink: #111713;
  --ink-2: #1b241e;
  --paper: #f2f0e9;
  --white: #fffdf7;
  --muted: #747b74;
  --line: rgba(17, 23, 19, .16);
  --blue: #086bac;
  --cyan: #09dbe3;
  --orange: #ffa21c;
  --lime: var(--cyan);
  --max: 1440px;
  --pad: clamp(24px, 5vw, 84px);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", Arial, sans-serif; line-height: 1.6; overflow-x: hidden; }
body.menu-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
img { display: block; width: 100%; }
.noise { position: fixed; inset: 0; pointer-events: none; z-index: 99; opacity: .045; background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.5'/%3E%3C/svg%3E"); }
.site-header { height: 88px; position: fixed; inset: 0 0 auto; z-index: 50; display: flex; align-items: center; justify-content: space-between; padding: 0 var(--pad); color: #fff; border-bottom: 1px solid rgba(255,255,255,.18); transition: .35s ease; }
.site-header.scrolled { height: 72px; color: var(--ink); background: rgba(242,240,233,.9); border-color: var(--line); backdrop-filter: blur(18px); }
.brand { display: flex; gap: 12px; align-items: center; line-height: 1; }
.brand-mark { width: 38px; height: 38px; color: var(--orange); flex: 0 0 auto; }
.brand span { display: grid; gap: 6px; }
.brand b { font-size: 18px; letter-spacing: .12em; }
.brand small { font-size: 8px; letter-spacing: .19em; opacity: .66; }
.site-nav { display: flex; align-items: center; gap: clamp(18px, 2.5vw, 42px); font-size: 13px; }
.site-nav > a { position: relative; }
.site-nav > a:not(.nav-cta)::after { content: ""; height: 1px; position: absolute; left: 0; right: 100%; bottom: -8px; background: currentColor; transition: .25s; }
.site-nav > a:hover::after { right: 0; }
.nav-cta { border: 1px solid currentColor; padding: 10px 15px; display: flex; gap: 24px; align-items: center; }
.nav-cta:hover { color: #fff; background: var(--orange); border-color: var(--orange); }
.menu-toggle { display: none; border: 0; padding: 10px; background: none; color: inherit; }
.menu-toggle span { display: block; width: 24px; height: 1px; margin: 6px 0; background: currentColor; }
.hero { min-height: 780px; height: 100svh; position: relative; display: flex; align-items: center; color: #fff; background: var(--ink); overflow: hidden; }
.hero-media, .hero-overlay { position: absolute; inset: 0; }
.hero-media img { width: 100%; height: 100%; object-fit: cover; object-position: center; filter: saturate(.72) contrast(1.08); animation: heroScale 14s ease-out both; }
@keyframes heroScale { from { transform: scale(1.07); } to { transform: scale(1); } }
.hero-overlay { background: linear-gradient(90deg, rgba(9,15,11,.93) 0%, rgba(9,15,11,.65) 50%, rgba(9,15,11,.12) 82%), linear-gradient(0deg, rgba(9,15,11,.8), transparent 45%); }
.hero-content { position: relative; z-index: 2; width: min(100%, var(--max)); padding: 80px var(--pad) 130px; margin: auto; }
.eyebrow, .mini-label, .section-index { margin: 0 0 28px; font-size: 11px; letter-spacing: .2em; font-weight: 700; color: var(--orange); }
.eyebrow.light { color: #fff; opacity: .72; }
.hero h1 { margin: 0; max-width: 990px; font-size: clamp(52px, 7.3vw, 112px); line-height: 1.03; letter-spacing: -.065em; font-weight: 800; }
.hero h1 span, .system-intro h2 span, .contact-title h2 span { color: var(--lime); }
.hero-lead { max-width: 650px; margin: 30px 0 0; color: rgba(255,255,255,.76); font-size: clamp(15px, 1.2vw, 18px); }
.hero-actions { display: flex; gap: 12px; margin-top: 40px; }
.button { min-height: 52px; padding: 0 24px; display: inline-flex; align-items: center; justify-content: space-between; gap: 36px; border: 1px solid transparent; cursor: pointer; font-weight: 700; font-size: 14px; transition: .25s ease; }
.button-primary { color: #fff; background: var(--orange); }
.button-primary:hover { color: var(--ink); background: var(--lime); transform: translateY(-2px); }
.button-ghost { color: #fff; border-color: rgba(255,255,255,.54); }
.button-ghost:hover { color: var(--ink); background: #fff; }
.hero-proof { position: absolute; z-index: 2; right: var(--pad); bottom: 0; display: grid; grid-template-columns: repeat(3, minmax(150px, 220px)); background: rgba(17,23,19,.82); backdrop-filter: blur(18px); }
.hero-proof > div { min-height: 132px; padding: 25px 22px; border-left: 1px solid rgba(255,255,255,.14); }
.hero-proof strong { display: block; margin-bottom: 10px; font-size: 30px; color: var(--lime); line-height: 1; }
.hero-proof span { display: block; font-size: 11px; line-height: 1.55; color: rgba(255,255,255,.64); }
.scroll-note { position: absolute; z-index: 2; left: var(--pad); bottom: 32px; display: flex; gap: 12px; align-items: center; font-size: 8px; letter-spacing: .2em; opacity: .55; }
.scroll-note span { width: 36px; height: 1px; background: currentColor; }
.section-pad { padding: clamp(88px, 11vw, 170px) var(--pad); }
.statement { max-width: var(--max); margin: auto; }
.section-index { color: var(--muted); }
.section-index.inverse { color: rgba(255,255,255,.48); }
.statement-grid { display: grid; grid-template-columns: minmax(0, 1.65fr) minmax(280px, .7fr); gap: 8vw; align-items: end; }
.statement h2, .section-head h2, .system-intro h2, .quality h2, .contact-title h2 { margin: 0; font-size: clamp(38px, 5.5vw, 82px); letter-spacing: -.055em; line-height: 1.08; }
.statement h2 span, .quality h2 span { color: var(--orange); }
.statement-grid > div > p, .section-head > p, .system-intro > p, .quality-copy > p, .contact-title > p { margin: 0; color: var(--muted); font-size: 15px; }
.text-link { display: inline-flex; gap: 40px; padding: 13px 0; margin-top: 28px; border-bottom: 1px solid var(--ink); font-size: 13px; font-weight: 700; }
.text-link:hover { gap: 54px; color: var(--orange); border-color: var(--orange); }
.product { background: var(--white); }
.section-head { max-width: var(--max); margin: auto; display: grid; grid-template-columns: 1.45fr .55fr; gap: 8vw; align-items: end; }
.section-head > p { padding-bottom: 8px; }
.product-stage { max-width: var(--max); margin: 82px auto 0; display: grid; grid-template-columns: 1.25fr .75fr; background: var(--paper); }
.image-frame { position: relative; overflow: hidden; background: #d7d7d1; }
.image-frame img { height: 100%; object-fit: cover; transition: transform .8s cubic-bezier(.2,.8,.2,1); }
.image-frame:hover img { transform: scale(1.025); }
.product-photo { min-height: 630px; }
.photo-label { position: absolute; inset: auto 0 0; padding: 22px 26px; display: flex; justify-content: space-between; align-items: center; color: #fff; background: linear-gradient(0deg, rgba(8,12,9,.85), transparent); }
.photo-label span { font-size: 9px; letter-spacing: .18em; }
.photo-label b { font-size: 13px; }
.product-features { padding: 20px clamp(24px, 4vw, 64px); display: flex; flex-direction: column; justify-content: center; }
.product-features article { display: grid; grid-template-columns: 40px 1fr; gap: 20px; padding: 34px 0; border-bottom: 1px solid var(--line); }
.product-features article:last-child { border-bottom: 0; }
.feature-no { color: var(--orange); font-size: 11px; font-weight: 700; }
.product-features h3 { margin: 0 0 8px; font-size: 21px; }
.product-features p { margin: 0; color: var(--muted); font-size: 13px; }
.life-compare { max-width: var(--max); margin: 36px auto 0; padding: clamp(30px, 4vw, 62px); color: #fff; background: var(--ink); display: grid; grid-template-columns: .65fr 1.35fr; gap: 7vw; align-items: center; }
.compare-copy h3 { margin: 0 0 14px; font-size: clamp(26px, 3vw, 44px); }
.compare-copy p:last-child { margin: 0; color: rgba(255,255,255,.55); font-size: 12px; }
.bars { display: grid; gap: 28px; }
.bar-row { display: grid; grid-template-columns: 120px 1fr 50px; align-items: center; gap: 18px; font-size: 11px; }
.bar-row b { font-size: 18px; text-align: right; }
.bar-track { height: 8px; background: rgba(255,255,255,.13); }
.bar-track i { display: block; width: 0; height: 100%; background: #89918b; transition: width 1.2s cubic-bezier(.2,.8,.2,1); }
.life-compare.visible .bar-track i { width: var(--bar); }
.bar-row.featured { color: var(--lime); }
.bar-row.featured .bar-track i { background: var(--lime); }
.system { color: #fff; background: var(--ink); }
.system-intro { max-width: var(--max); margin: auto; display: grid; grid-template-columns: 1fr 1.8fr .65fr; gap: 5vw; align-items: end; }
.system-intro .section-index { align-self: start; }
.system-intro > p { color: rgba(255,255,255,.55); }
.process-wrap { max-width: var(--max); margin: auto; padding-top: 0; display: grid; grid-template-columns: .75fr 1.25fr; gap: 7vw; align-items: center; }
.process-list { list-style: none; margin: 0; padding: 0; }
.process-list li { display: grid; grid-template-columns: 52px 1fr; padding: 24px 0; border-bottom: 1px solid rgba(255,255,255,.16); opacity: .42; cursor: pointer; transition: .25s; }
.process-list li:hover, .process-list li.active { opacity: 1; }
.process-list li.active { border-color: var(--lime); }
.process-list li > span { color: var(--lime); font-size: 11px; }
.process-list h3 { margin: 0; font-size: 19px; }
.process-list p { max-height: 0; margin: 0; overflow: hidden; color: rgba(255,255,255,.6); font-size: 12px; transition: .35s; }
.process-list li.active p { max-height: 70px; margin-top: 8px; }
.process-visual { position: sticky; top: 100px; height: min(68vh, 720px); min-height: 520px; overflow: hidden; }
.process-visual img { height: 100%; object-fit: cover; transition: opacity .2s; }
.process-caption { position: absolute; inset: auto 0 0; display: grid; grid-template-columns: 80px 1fr; align-items: center; padding: 24px; color: var(--ink); background: var(--lime); }
.process-caption span { font-size: 30px; font-weight: 800; }
.process-caption p { margin: 0; font-size: 13px; font-weight: 700; }
.cases { max-width: var(--max); margin: auto; }
.case-tabs { margin-top: 72px; display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.case-tab { padding: 20px 4px; border: 0; color: var(--muted); background: none; text-align: left; cursor: pointer; transition: .2s; }
.case-tab small { display: block; margin-top: 4px; font-size: 10px; }
.case-tab.active { color: var(--ink); box-shadow: inset 0 -3px var(--orange); font-weight: 700; }
.case-view { margin-top: 36px; display: grid; grid-template-columns: 1.35fr .65fr; min-height: 620px; background: var(--white); }
.case-image { min-height: 540px; }
.image-zoom { position: absolute; right: 20px; bottom: 20px; width: 46px; height: 46px; border: 0; border-radius: 50%; color: #fff; background: rgba(17,23,19,.82); cursor: pointer; font-size: 24px; transition: .2s; }
.image-zoom:hover { color: var(--ink); background: var(--lime); transform: rotate(90deg); }
.case-copy { padding: clamp(35px, 5vw, 76px); display: flex; flex-direction: column; justify-content: center; }
.case-copy h3 { margin: 0; font-size: clamp(32px, 4vw, 58px); line-height: 1.07; letter-spacing: -.04em; }
.case-copy > p:not(.mini-label) { margin: 24px 0 36px; color: var(--muted); font-size: 13px; }
.case-copy dl { margin: 0; }
.case-copy dl div { padding: 14px 0; display: grid; grid-template-columns: 80px 1fr; border-top: 1px solid var(--line); font-size: 11px; }
.case-copy dt { color: var(--muted); }
.case-copy dd { margin: 0; font-weight: 700; }
.quality { max-width: var(--max); margin: auto; display: grid; grid-template-columns: 1.05fr .95fr; gap: 8vw; align-items: center; }
.quality-photo { position: relative; min-height: 720px; overflow: hidden; }
.quality-photo img { position: absolute; inset: 0; height: 100%; object-fit: cover; }
.quality-photo span { position: absolute; left: 20px; bottom: 18px; color: #fff; font-size: 8px; letter-spacing: .16em; }
.quality-copy > p { margin: 28px 0 0; }
.check-list { list-style: none; padding: 0; margin: 38px 0 0; display: grid; grid-template-columns: 1fr 1fr; gap: 0 26px; }
.check-list li { padding: 14px 0; border-top: 1px solid var(--line); font-size: 12px; font-weight: 700; }
.check-list span { color: var(--orange); margin-right: 8px; }
.contact { color: #fff; background: var(--ink-2); display: grid; grid-template-columns: 1fr 1fr; }
.contact-title { padding-right: 8vw; }
.contact-title > p { max-width: 480px; margin-top: 28px; color: rgba(255,255,255,.55); }
.contact-form { padding: clamp(88px, 11vw, 170px) var(--pad) clamp(88px, 11vw, 170px) 0; align-self: center; display: grid; grid-template-columns: 1fr 1fr; gap: 28px 22px; }
.contact-form label { display: grid; gap: 8px; }
.contact-form label span { font-size: 10px; letter-spacing: .12em; color: rgba(255,255,255,.48); }
.contact-form input, .contact-form select, .contact-form textarea { width: 100%; padding: 12px 0; border: 0; border-bottom: 1px solid rgba(255,255,255,.25); border-radius: 0; outline: none; color: #fff; background: transparent; resize: vertical; }
.contact-form input:focus, .contact-form select:focus, .contact-form textarea:focus { border-color: var(--lime); }
.contact-form option { color: var(--ink); }
.contact-form .wide { grid-column: 1 / -1; }
.form-submit { margin-top: 16px; border: 0; }
.form-note { align-self: center; margin: 16px 0 0; font-size: 9px; color: rgba(255,255,255,.4); }
.site-footer { min-height: 190px; padding: 48px var(--pad); display: grid; grid-template-columns: 1.2fr .6fr .8fr; align-items: center; gap: 30px; color: #fff; background: #0b0f0c; }
.footer-brand { display: flex; align-items: center; gap: 16px; }
.footer-brand .brand-mark { color: var(--lime); }
.footer-brand div { display: grid; }
.footer-brand span, .footer-meta { color: rgba(255,255,255,.45); font-size: 9px; letter-spacing: .08em; }
.footer-nav { display: flex; gap: 24px; font-size: 11px; }
.footer-meta { display: grid; gap: 7px; text-align: right; }
.icp-link { color: inherit; text-decoration: none; transition: color .2s ease; }
.icp-link:hover, .icp-link:focus-visible { color: #fff; }
.lightbox { width: min(92vw, 1200px); max-width: none; padding: 0; border: 0; background: transparent; }
.lightbox::backdrop { background: rgba(5,8,6,.92); backdrop-filter: blur(8px); }
.lightbox img { max-height: 86vh; object-fit: contain; }
.lightbox button { position: fixed; top: 24px; right: 28px; width: 44px; height: 44px; border: 1px solid rgba(255,255,255,.5); border-radius: 50%; color: #fff; background: transparent; cursor: pointer; font-size: 24px; }
.toast { position: fixed; z-index: 90; right: 24px; bottom: 24px; width: min(380px, calc(100vw - 48px)); padding: 18px 20px; display: grid; gap: 4px; color: var(--ink); background: var(--lime); transform: translateY(140%); transition: .4s cubic-bezier(.2,.8,.2,1); }
.toast.show { transform: none; }
.toast b { font-size: 14px; }
.toast span { font-size: 11px; }
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .75s ease, transform .75s ease; }
.reveal.visible { opacity: 1; transform: none; }
@media (max-width: 1000px) {
  .hero-proof { left: var(--pad); right: var(--pad); grid-template-columns: repeat(3, 1fr); }
  .scroll-note { display: none; }
  .statement-grid, .section-head, .system-intro { grid-template-columns: 1fr; gap: 28px; }
  .product-stage, .case-view, .quality { grid-template-columns: 1fr; }
  .product-photo { min-height: 60vw; }
  .life-compare { grid-template-columns: 1fr; }
  .system-intro > p { max-width: 520px; }
  .process-wrap { gap: 4vw; }
  .quality-photo { min-height: 65vw; }
  .contact { grid-template-columns: 1fr; }
  .contact-title { padding-bottom: 20px; }
  .contact-form { padding: 30px var(--pad) 100px; }
}
@media (max-width: 760px) {
  .site-header { height: 72px; }
  .menu-toggle { display: block; z-index: 2; }
  .site-nav { position: fixed; inset: 0 auto auto 0; z-index: 1; width: 100vw; height: 100dvh; min-height: 100vh; padding: 120px var(--pad) 50px; display: flex; flex-direction: column; align-items: stretch; gap: 0; overflow-y: auto; overscroll-behavior: contain; color: #fff; background: var(--ink); transform: translateX(100%); transition: .35s ease; }
  .menu-open .site-nav { transform: none; }
  .menu-open .site-header.scrolled { background: transparent; border-color: transparent; -webkit-backdrop-filter: none; backdrop-filter: none; }
  .site-nav > a { padding: 18px 0; border-bottom: 1px solid rgba(255,255,255,.14); font-size: 20px; }
  .site-nav .nav-cta { margin-top: 24px; padding: 15px 18px; font-size: 14px; }
  .menu-open .menu-toggle span:first-child { transform: translateY(3.5px) rotate(45deg); }
  .menu-open .menu-toggle span:last-child { transform: translateY(-3.5px) rotate(-45deg); }
  .hero { min-height: 760px; height: 100svh; align-items: flex-start; }
  .hero-content { padding-top: 145px; padding-bottom: 230px; }
  .hero h1 { font-size: clamp(48px, 15vw, 72px); }
  .hero h1 br { display: none; }
  .hero-lead { font-size: 14px; }
  .hero-actions { align-items: stretch; flex-direction: column; width: min(100%, 330px); }
  .hero-proof { grid-template-columns: repeat(3, 1fr); }
  .hero-proof > div { min-height: 106px; padding: 18px 10px; }
  .hero-proof strong { font-size: 20px; }
  .hero-proof span { font-size: 8px; }
  .product-stage { margin-top: 50px; }
  .product-photo { min-height: 82vw; }
  .photo-label { align-items: flex-start; flex-direction: column; gap: 5px; }
  .life-compare { margin-top: 16px; }
  .bar-row { grid-template-columns: 1fr 42px; }
  .bar-row > span { grid-column: 1 / -1; }
  .process-wrap { grid-template-columns: 1fr; }
  .process-visual { position: relative; top: auto; width: 100%; height: 65vw; min-height: 360px; grid-column: 1 / -1; margin: 0 0 24px; order: -1; }
  .case-tabs { grid-template-columns: 1fr; }
  .case-tab { padding: 13px 4px; }
  .case-tab small { display: inline; margin-left: 8px; }
  .case-view { min-height: 0; }
  .case-image { min-height: 75vw; }
  .quality-copy { padding-top: 60px; }
  .check-list { grid-template-columns: 1fr; }
  .contact-form { grid-template-columns: 1fr; }
  .contact-form .wide { grid-column: auto; }
  .site-footer { grid-template-columns: 1fr; }
  .footer-meta { text-align: left; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}

/* Official Zhixin trademark integration */
.brand { width: 146px; height: 58px; padding: 4px 8px; display: flex; align-items: center; background: #fff; overflow: hidden; box-shadow: 0 7px 26px rgba(0,0,0,.12); transition: .3s ease; }
.brand img { width: 100%; height: 100%; object-fit: contain; }
.site-header.scrolled .brand { width: 132px; height: 52px; box-shadow: none; border: 1px solid rgba(8,107,172,.12); }
.nav-cta:hover { color: #fff; background: var(--blue); border-color: var(--blue); }
.button-primary { color: #fff; background: var(--blue); }
.feature-no { color: var(--blue); }
.case-tab.active { box-shadow: inset 0 -3px var(--blue); }
.footer-brand > img { width: 144px; height: 72px; padding: 5px 8px; object-fit: contain; background: #fff; flex: 0 0 auto; }
@media (max-width: 760px) { .brand { width: 124px; height: 48px; } .footer-brand { align-items: flex-start; flex-direction: column; } }
/* Transparent official logo */
.brand { padding: 0; background: transparent; box-shadow: none; overflow: visible; }
.site-header.scrolled .brand { box-shadow: none; border: 0; }
.footer-brand > img { padding: 0; background: transparent; }
/* Selected roof hero treatment */
.hero-media img {
  object-position: center 46%;
  filter: saturate(.76) contrast(1.12) brightness(.9);
}
.hero-overlay {
  background:
    linear-gradient(90deg, rgba(2,31,54,.95) 0%, rgba(4,49,79,.82) 37%, rgba(7,66,95,.4) 67%, rgba(5,27,39,.14) 100%),
    linear-gradient(0deg, rgba(2,21,32,.82) 0%, rgba(2,28,43,.18) 55%, rgba(2,26,41,.28) 100%);
}
.hero-content { padding-top: 108px; }
.hero .eyebrow { color: var(--cyan); opacity: .95; font-family: Arial, sans-serif; font-weight: 700; letter-spacing: .24em; }
.hero h1 {
  max-width: 1080px;
  font-family: "Microsoft YaHei UI", "Source Han Sans SC", "Noto Sans CJK SC", "PingFang SC", sans-serif;
  font-size: clamp(50px, 6.9vw, 104px);
  font-weight: 720;
  line-height: 1.075;
  letter-spacing: -.052em;
  text-shadow: 0 5px 30px rgba(0,20,34,.3);
}
.hero h1 span { position: relative; display: inline-block; color: var(--cyan); text-shadow: 0 3px 26px rgba(9,219,227,.12); }
.hero h1 span::after { content: ""; position: absolute; left: .03em; right: .02em; bottom: -.06em; height: .055em; background: var(--orange); }
.hero-lead { max-width: 680px; color: rgba(255,255,255,.84); font-size: clamp(15px, 1.15vw, 17px); line-height: 1.8; }
.hero .button-primary { color: #12202a; background: var(--orange); }
.hero .button-primary:hover { color: #062337; background: var(--cyan); }
.hero .button-ghost { border-color: rgba(255,255,255,.62); background: rgba(3,39,62,.15); backdrop-filter: blur(8px); }
.hero-proof { background: rgba(3,39,62,.84); border-top: 2px solid rgba(9,219,227,.72); }
.hero-proof > div { border-left-color: rgba(255,255,255,.17); }
.hero-proof strong { color: var(--cyan); }
.hero-proof span { color: rgba(255,255,255,.72); }
.site-header:not(.scrolled) .brand img { filter: drop-shadow(0 2px 10px rgba(255,255,255,.24)); }
@media (max-width: 760px) {
  .hero-media img { object-position: 58% center; }
  .hero-content { padding-top: 132px; }
  .hero h1 { font-size: clamp(45px, 14.4vw, 68px); line-height: 1.08; letter-spacing: -.055em; }
  .hero-lead { line-height: 1.7; }
}
/* Hero proof copy sizing */
.hero-proof > div:first-child strong { font-size: 25px; white-space: nowrap; }
.hero-proof > div:nth-child(2) span,
.hero-proof > div:nth-child(3) span { max-width: 190px; }
@media (max-width: 760px) {
  .hero-proof > div:first-child strong { font-size: 16px; }
  .hero-proof span br { display: none; }
}
/* Reference lifespan bar */
.bar-row.reference { color: #b9d9ec; }
.bar-row.reference .bar-track i { background: var(--blue); }
/* Site survey image framing */
#processImage { object-position: center 52%; }
/* Quality process grid framing */
.quality-photo { min-height: 600px; background: var(--ink); }
.quality-photo img { object-fit: contain; background: var(--ink); }
/* Hero contact line */
.hero-contact {
  position: absolute;
  z-index: 3;
  right: var(--pad);
  bottom: 148px;
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 10px 14px;
  color: #fff;
  background: rgba(3,39,62,.72);
  border-left: 2px solid var(--orange);
  backdrop-filter: blur(10px);
  font-size: 12px;
  letter-spacing: .03em;
}
.hero-contact span { color: var(--cyan); font-weight: 700; }
.hero-contact a { color: #fff; font-variant-numeric: tabular-nums; }
.hero-contact a:hover { color: var(--orange); }
@media (max-width: 760px) {
  .hero-contact {
    left: var(--pad);
    right: var(--pad);
    bottom: 116px;
    justify-content: center;
    gap: 10px;
    padding: 8px 6px;
    font-size: 9px;
  }
}
/* Original product photograph: CSS-only close crop keeps printed text exact. */
.product-photo img.product-material-original {
  object-position: 50% 45%;
  transform: scale(1.55);
  transform-origin: 50% 45%;
}
.product-photo:hover img.product-material-original {
  transform: scale(1.59);
}


/* Direct contact details and social QR codes. */
.contact-direct {
  align-self: center;
  padding: clamp(72px, 8vw, 130px) var(--pad) clamp(72px, 8vw, 130px) 0;
  display: grid;
  gap: 42px;
}
.contact-phones { display: grid; gap: 12px; }
.contact-kicker {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: .18em;
  color: rgba(255,255,255,.5);
}
.contact-person {
  width: fit-content;
  display: grid;
  grid-template-columns: 32px auto;
  align-items: baseline;
  gap: 18px;
  color: #fff;
  text-decoration: none;
}
.contact-person span { font-size: 16px; color: var(--cyan); }
.contact-person b { font-size: clamp(24px, 2.2vw, 34px); font-weight: 500; letter-spacing: .04em; }
.contact-person:hover b { color: var(--cyan); }
.contact-qrs {
  max-width: 570px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}
.qr-card {
  margin: 0;
  padding: 10px 10px 14px;
  overflow: hidden;
  color: var(--ink);
  background: #fff;
  border-radius: 14px;
}
.qr-card img {
  width: 100%;
  aspect-ratio: 2 / 3;
  display: block;
  object-fit: contain;
  background: #fff;
  border-radius: 8px;
}
.qr-card figcaption { padding: 12px 6px 2px; display: flex; justify-content: space-between; align-items: baseline; gap: 8px; }
.qr-card figcaption b { font-size: 14px; }
.qr-card figcaption span { font-size: 10px; color: #667078; }
@media (max-width: 980px) {
  .contact-direct { padding: 30px var(--pad) 100px; }
}
@media (max-width: 560px) {
  .contact-qrs { grid-template-columns: 1fr; max-width: 310px; }
  .contact-person b { font-size: 25px; }
}

/* Refined contact typography and lossless QR crops. */
.contact-kicker {
  margin-bottom: 14px;
  font-size: clamp(17px, 1.45vw, 21px);
  font-weight: 650;
  letter-spacing: .1em;
  color: #fff;
}
.contact-person { grid-template-columns: 68px auto; gap: 18px; }
.contact-person span {
  font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
  font-size: clamp(16px, 1.3vw, 19px);
  font-weight: 650;
  white-space: nowrap;
}
.contact-person b {
  font-size: clamp(27px, 2.55vw, 39px);
  font-weight: 520;
  letter-spacing: .035em;
}
.qr-image {
  position: relative;
  width: 100%;
  aspect-ratio: 1;
  overflow: hidden;
  background: #fff;
  border-radius: 8px;
}
.qr-image img {
  position: absolute;
  left: 50%;
  height: auto;
  max-width: none;
  aspect-ratio: auto;
  object-fit: initial;
  border-radius: 0;
  transform: translate(-50%, -50%);
}
.qr-card.wechat .qr-image img { top: 52.5%; width: 151%; }
.qr-card.douyin .qr-image img { top: 35.6%; width: 156%; }
.qr-card figcaption { padding-top: 15px; }
.qr-card figcaption b { font-size: 17px; }
.qr-card figcaption span { font-size: 11px; }
@media (max-width: 560px) {
  .contact-person { grid-template-columns: 62px auto; gap: 12px; }
  .contact-person b { font-size: 25px; }
}

/* Square WeChat QR with caption above. */
.qr-card.wechat { display: flex; flex-direction: column; }
.qr-card.wechat .qr-caption-top {
  order: 0;
  justify-content: center;
  padding: 6px 6px 15px;
  text-align: center;
}
.qr-card.wechat .qr-caption-top b { font-size: 17px; letter-spacing: .04em; }
.qr-card.wechat .qr-image { order: 1; }
.qr-card.wechat .qr-image img {
  top: 50%;
  width: 100%;
}

/* Circular Douyin QR without the source background. */
.qr-card.douyin { display: flex; flex-direction: column; }
.qr-card.douyin .qr-caption-top {
  order: 0;
  justify-content: center;
  padding: 6px 6px 15px;
  text-align: center;
}
.qr-card.douyin .qr-caption-top b { font-size: 17px; letter-spacing: .04em; }
.qr-card.douyin .qr-image {
  order: 1;
  border-radius: 50%;
}
.qr-card.douyin .qr-image img {
  top: 39.6%;
  width: 128%;
}

/* Full transparent Douyin QR: preserve the complete 334px circle. */
.qr-card.douyin .qr-image { background: transparent; }
.qr-card.douyin .qr-image img {
  top: 50%;
  width: 100%;
}

/* Douyin QR V2: transparent safety margin, no secondary circle clipping. */
.qr-card.douyin .qr-image {
  overflow: hidden;
  background: #fff;
  border-radius: 8px;
}
.qr-card.douyin .qr-image img {
  top: 50%;
  width: 100%;
  background: transparent;
}

/* Full Douyin source card: keep gray background, name, and account ID. */
.qr-card.douyin .qr-image {
  aspect-ratio: 419 / 463;
  overflow: hidden;
  background: #607284;
  border-radius: 8px;
}
.qr-card.douyin .qr-image img {
  top: 50%;
  width: 100%;
  background: transparent;
}

/* Contact names match phone-number size. */
.contact-person {
  grid-template-columns: max-content auto;
  gap: 20px;
}
.contact-person span,
.contact-person b {
  font-size: clamp(27px, 2.55vw, 39px);
  font-weight: 520;
  line-height: 1.12;
}
@media (max-width: 560px) {
  .contact-person {
    grid-template-columns: max-content auto;
    gap: 12px;
  }
  .contact-person span,
  .contact-person b { font-size: 25px; }
}

/* Enlarged footer navigation and brand typography. */
.footer-nav {
  gap: 30px;
  font-size: 17px;
  font-weight: 600;
  letter-spacing: .04em;
}
.footer-brand div { gap: 6px; }
.footer-brand b {
  font-size: 20px;
  font-weight: 650;
  line-height: 1.3;
  letter-spacing: .03em;
}
.footer-brand span {
  font-size: 13px;
  line-height: 1.5;
  letter-spacing: .06em;
}
@media (max-width: 760px) {
  .footer-nav { font-size: 16px; }
  .footer-brand b { font-size: 19px; }
  .footer-brand span { font-size: 13px; }
}

/* Release hardening: accessibility and no-JavaScript fallback. */
.reveal { opacity: 1; transform: none; }
.js .reveal { opacity: 0; transform: translateY(24px); transition: opacity .75s ease, transform .75s ease; }
.js .reveal.visible { opacity: 1; transform: none; }
.menu-toggle span { transition: transform .25s ease; }
a:focus-visible,
button:focus-visible,
.process-list li:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 4px;
}
.process-list li:focus-visible { opacity: 1; }
@media (prefers-reduced-motion: reduce) {
  .js .reveal { opacity: 1; transform: none; }
}