:root {
  --ink: #101310;
  --paper: #f2efe7;
  --paper-deep: #e8e4da;
  --white: #fff;
  --muted: #70746b;
  --line: rgba(16,19,16,.14);
  --line-light: rgba(255,255,255,.18);
  --accent: #178f79;
  --wechat: #07c160;
  --shell: min(1400px, calc(100vw - 96px));
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 100px; overflow-x: clip; }
body { margin: 0; overflow-x: clip; background: var(--paper); color: var(--ink); font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Helvetica Neue", Arial, sans-serif; -webkit-font-smoothing: antialiased; }
img { display: block; width: 100%; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; }
h1, h2, h3, p, figure { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }
[hidden] { display: none !important; }
::selection { background: var(--accent); color: var(--white); }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }
.shell { width: var(--shell); margin-inline: auto; }
.skip-link { position: fixed; left: 16px; top: -100px; z-index: 1000; padding: 12px 18px; background: var(--ink); color: var(--white); }
.skip-link:focus { top: 16px; }
.kicker { color: var(--accent); font-family: "SFMono-Regular", Consolas, monospace; font-size: 10px; font-weight: 700; letter-spacing: .14em; }
.section-head h2, .hero-copy h1, .strength-copy h2, .material-contact h2, .empty-card h2 { font-weight: 850; letter-spacing: -.06em; line-height: .98; }
.button { min-height: 50px; display: inline-flex; align-items: center; justify-content: center; gap: 16px; padding: 0 20px; border: 1px solid transparent; border-radius: 2px; font-size: 12px; font-weight: 750; transition: transform .2s, background .2s, color .2s, border-color .2s; }
.button:hover { transform: translateY(-2px); }
.button-dark { background: var(--ink); color: var(--white); }
.button-dark span { color: var(--accent); font-size: 16px; }
.button-dark:hover { background: var(--accent); color: var(--ink); }
.button-line { border-color: rgba(16,19,16,.26); }
.button-line:hover { background: var(--white); border-color: var(--ink); }
.button-wechat, .wechat-link { background: var(--wechat); color: var(--white); }
.button-wechat:hover { background: #06a64f; }

/* Header */
.topbar { background: var(--ink); color: rgba(255,255,255,.72); font-size: 11px; letter-spacing: .04em; }
.topbar-inner { min-height: 36px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.topbar-inner span { display: inline-flex; align-items: center; gap: 9px; }
.topbar-inner i { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 18%, transparent); }
.topbar a { color: var(--white); }
.material-header { position: sticky; top: 0; z-index: 100; background: rgba(248,246,240,.96); border-bottom: 1px solid var(--line); backdrop-filter: blur(18px); }
.header-inner { min-height: 80px; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 12px; flex: 0 0 auto; }
.brand img { width: 44px; height: 44px; object-fit: contain; }
.brand span { display: flex; flex-direction: column; line-height: 1; }
.brand strong { font-size: 19px; letter-spacing: .08em; }
.brand small { margin-top: 6px; color: var(--muted); font-size: 8px; letter-spacing: .18em; }
.material-nav { display: flex; align-items: center; gap: 5px; }
.material-nav a { padding: 10px 14px; border: 1px solid transparent; font-size: 12px; font-weight: 750; transition: .2s; }
.material-nav a:hover { border-color: var(--line); background: var(--white); }
.material-nav a.is-active { background: var(--ink); color: var(--white); }
.header-actions { display: flex; align-items: center; gap: 18px; }
.header-link { color: var(--muted); font-size: 11px; font-weight: 650; white-space: nowrap; }
.header-link:hover { color: var(--accent); }
.header-contact { display: inline-flex; align-items: center; gap: 10px; padding: 11px 15px; background: #1ebe5d; color: var(--white); font-size: 10px; font-weight: 750; }
.header-contact span { color: #e8fff0; font-size: 14px; }

/* Hero */
.material-hero { position: relative; overflow: hidden; padding: 68px 0 92px; }
.material-hero::before { content: ""; position: absolute; right: -18vw; top: -32vw; width: 62vw; height: 62vw; border-radius: 50%; background: color-mix(in srgb, var(--accent) 9%, transparent); pointer-events: none; }
.hero-grid { position: relative; display: grid; grid-template-columns: minmax(0,1fr) minmax(430px,.78fr); gap: clamp(48px,7vw,100px); align-items: center; }
.hero-copy { position: relative; z-index: 1; }
.back-link { display: inline-flex; margin-bottom: 26px; color: var(--muted); font-size: 11px; }
.back-link:hover { color: var(--accent); }
.hero-copy h1 { max-width: 840px; margin-top: 20px; font-size: clamp(60px,7vw,104px); }
.hero-intro { max-width: 680px; margin-top: 28px; color: #5f625a; font-size: clamp(15px,1.25vw,18px); line-height: 1.9; }
.hero-specs { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 26px; }
.hero-specs span { padding: 8px 11px; border: 1px solid rgba(16,19,16,.18); background: rgba(255,255,255,.4); font-size: 10px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 30px; }
.hero-note { margin-top: 18px; color: var(--muted); font-size: 10px; }
.hero-media { min-width: 0; }
.material-video-card { position: relative; width: 100%; height: clamp(520px,66vh,680px); background: #050605; overflow: hidden; box-shadow: 0 28px 70px rgba(16,19,16,.14); }
.material-video-card.video-horizontal { height: auto; aspect-ratio: var(--video-ratio); max-height: 680px; }
.material-video-card video { width: 100%; height: 100%; object-fit: contain; background: #050605; }
.material-video-card::after { content: ""; position: absolute; inset: 0; pointer-events: none; background: linear-gradient(180deg, transparent 60%, rgba(16,19,16,.74)); }
.video-play-button { position: absolute; z-index: 2; inset: 0; display: flex; align-items: center; justify-content: center; gap: 13px; border: 0; background: transparent; color: var(--white); cursor: pointer; transition: opacity .2s, visibility .2s; }
.play-icon { width: 62px; height: 62px; display: grid; place-items: center; padding-left: 4px; border-radius: 50%; background: rgba(255,255,255,.94); color: var(--ink); font-size: 18px; box-shadow: 0 8px 30px rgba(0,0,0,.2); }
.play-label { display: flex; flex-direction: column; align-items: flex-start; gap: 4px; font-size: 12px; font-weight: 750; text-shadow: 0 1px 8px rgba(0,0,0,.4); }
.play-label small { font-size: 9px; font-weight: 500; opacity: .7; }
.material-video-card.is-playing .video-play-button { opacity: 0; visibility: hidden; pointer-events: none; }
.material-video-card figcaption { position: absolute; z-index: 1; left: 22px; right: 22px; bottom: 20px; display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; color: var(--white); pointer-events: none; }
.material-video-card figcaption span { font-size: 14px; font-weight: 700; }
.material-video-card figcaption small { color: rgba(255,255,255,.58); font-size: 9px; }
.video-placeholder { height: clamp(520px,66vh,680px); }
.asset-placeholder { min-height: 260px; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 7px; padding: 24px; background: repeating-linear-gradient(135deg,#e3dfd5,#e3dfd5 12px,#ddd8cd 12px,#ddd8cd 24px); color: var(--muted); text-align: center; }
.asset-placeholder span { color: var(--accent); font-family: "SFMono-Regular", Consolas, monospace; font-size: 8px; letter-spacing: .12em; }
.asset-placeholder strong { color: var(--ink); font-size: 17px; }
.asset-placeholder small { max-width: 360px; font-size: 10px; line-height: 1.6; }
.media-placeholder { height: 100%; }

.material-strip { background: var(--ink); color: var(--white); }
.material-strip .shell { min-height: 68px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.material-strip span { font-size: 11px; font-weight: 700; letter-spacing: .04em; }
.material-strip i { flex: 1; height: 1px; background: rgba(255,255,255,.16); position: relative; }
.material-strip i::after { content: ""; position: absolute; top: -2px; right: 0; width: 5px; height: 5px; border-radius: 50%; background: var(--accent); }

/* Common section */
.material-section { padding: 118px 0; }
.section-head { display: grid; grid-template-columns: 1.15fr .6fr; gap: 76px; align-items: end; margin-bottom: 52px; }
.section-head h2 { font-size: clamp(46px,5.2vw,76px); }
.section-head > p { color: var(--muted); font-size: 13px; line-height: 1.9; }
.section-head-light { color: var(--white); }
.section-head-light > p { color: rgba(255,255,255,.56); }

/* Products */
.product-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 14px; }
.product-card { display: flex; flex-direction: column; min-width: 0; background: var(--white); border: 1px solid var(--line); }
.product-card-wide { grid-column: span 2; }
.product-media { aspect-ratio: 1 / 1; overflow: hidden; background: #d7d8d3; }
.product-card-wide .product-media { aspect-ratio: 16 / 9; }
.product-media img, .product-media video { width: 100%; height: 100%; object-fit: cover; }
.product-media video { background: #050605; object-fit: contain; }
.product-copy { padding: 18px 18px 20px; }
.product-copy > span { color: var(--accent); font-family: "SFMono-Regular", Consolas, monospace; font-size: 8px; letter-spacing: .1em; }
.product-copy h3 { margin-top: 7px; font-size: 23px; letter-spacing: -.04em; }
.product-copy p { margin-top: 7px; color: var(--muted); font-size: 10px; line-height: 1.65; }

/* Media cards */
.media-grid, .video-grid, .delivery-grid { display: grid; gap: 13px; }
.factory-grid { grid-template-columns: repeat(3,minmax(0,1fr)); }
.video-grid { grid-template-columns: repeat(3,minmax(0,1fr)); }
.delivery-grid { grid-template-columns: repeat(4,minmax(0,1fr)); }
.media-card { min-width: 0; background: var(--white); border: 1px solid var(--line); }
.media-frame { position: relative; aspect-ratio: 4 / 5; overflow: hidden; background: #161a16; }
.media-frame > img, .media-frame > video { width: 100%; height: 100%; object-fit: cover; }
.media-frame > video { object-fit: contain; background: #050605; }
.media-kind { position: absolute; z-index: 2; left: 11px; top: 11px; padding: 6px 8px; background: var(--accent); color: var(--ink); font-size: 8px; font-weight: 800; }
.media-copy { padding: 15px 15px 17px; }
.media-copy h3 { font-size: 19px; letter-spacing: -.035em; }
.media-copy p { margin-top: 6px; color: var(--muted); font-size: 10px; line-height: 1.6; }
.factory-section { background: var(--ink); color: var(--white); }
.factory-section .media-card { background: #191d18; border-color: var(--line-light); }
.factory-section .media-copy p { color: rgba(255,255,255,.5); }
.factory-section .asset-placeholder { background: repeating-linear-gradient(135deg,#242923,#242923 12px,#1f241f 12px,#1f241f 24px); }
.factory-section .asset-placeholder strong { color: var(--white); }
.production-section { background: #ebe7dd; }
.delivery-section { background: var(--paper); }
.delivery-card .media-frame { aspect-ratio: 1 / 1; }

/* Strength test */
.strength-section { background: #dce9e4; }
.strength-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: clamp(48px,7vw,100px); align-items: center; }
.strength-copy h2 { margin-top: 18px; font-size: clamp(46px,5.4vw,78px); }
.strength-copy > p:not(.kicker) { margin-top: 24px; color: #49605a; font-size: 14px; line-height: 1.9; }
.strength-copy ul { margin: 24px 0 30px; border-top: 1px solid rgba(16,19,16,.14); }
.strength-copy li { padding: 12px 0; border-bottom: 1px solid rgba(16,19,16,.14); font-size: 11px; }
.strength-copy li::before { content: "✓"; margin-right: 9px; color: var(--accent); font-weight: 800; }
.strength-media-card { max-width: 620px; margin-inline: auto; }
.strength-media-card .media-frame { aspect-ratio: 9 / 14; }

/* Machines */
.machines-section { background: var(--paper-deep); }
.machine-grid { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 13px; }
.machine-card { background: var(--white); border: 1px solid var(--line); }
.machine-media { aspect-ratio: 1 / 1.08; overflow: hidden; }
.machine-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s, filter .25s; filter: saturate(.85); }
.machine-card:hover img { transform: scale(1.04); filter: saturate(1); }
.machine-copy { padding: 16px; }
.machine-copy h3 { font-size: 19px; letter-spacing: -.035em; }
.machine-copy p { margin-top: 6px; color: var(--muted); font-size: 10px; line-height: 1.6; }

/* Applications */
.application-section { background: var(--white); }
.application-grid { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 13px; }
.application-card { position: relative; min-height: 340px; overflow: hidden; background: #d8d7d2; }
.application-card > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; filter: saturate(.82); transition: transform .6s, filter .3s; }
.application-card::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 45%, rgba(16,19,16,.84)); }
.application-card:hover > img { transform: scale(1.04); filter: saturate(1); }
.application-copy { position: absolute; z-index: 1; left: 18px; right: 18px; bottom: 17px; color: var(--white); }
.application-copy span { color: var(--accent); font-family: "SFMono-Regular", Consolas, monospace; font-size: 8px; letter-spacing: .1em; }
.application-copy h3 { margin-top: 6px; font-size: 21px; letter-spacing: -.035em; }
.application-copy p { margin-top: 5px; color: rgba(255,255,255,.58); font-size: 10px; line-height: 1.5; }

/* Empty acrylic */
.empty-material { padding: 110px 0; background: var(--paper-deep); }
.empty-card { max-width: 920px; text-align: center; }
.empty-card h2 { margin-top: 20px; font-size: clamp(46px,6vw,84px); }
.empty-card > p:not(.kicker) { max-width: 670px; margin: 24px auto 0; color: var(--muted); font-size: 14px; line-height: 1.9; }
.empty-card > div { display: flex; justify-content: center; gap: 9px; margin-top: 30px; }

/* Contact */
.material-contact { padding: 112px 0; background: var(--ink); color: var(--white); }
.contact-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: clamp(44px,7vw,100px); align-items: center; }
.material-contact h2 { margin-top: 18px; font-size: clamp(48px,5.8vw,88px); }
.contact-copy > p:not(.kicker) { max-width: 590px; margin-top: 24px; color: rgba(255,255,255,.55); font-size: 14px; line-height: 1.9; }
.contact-actions { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 30px; }
.contact-actions .button-line { color: var(--white); border-color: rgba(255,255,255,.25); }
.contact-actions .button-line:hover { background: var(--white); color: var(--ink); }
.contact-qr { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.contact-qr article { padding: 18px; background: var(--white); color: var(--ink); text-align: center; }
.contact-qr img { width: 100%; max-width: 220px; margin: 0 auto; object-fit: contain; }
.contact-qr span { display: block; margin-top: 10px; color: var(--muted); font-family: "SFMono-Regular", Consolas, monospace; font-size: 8px; letter-spacing: .12em; }
.contact-qr strong { display: block; margin-top: 4px; font-size: 14px; }
.contact-qr small { display: block; margin-top: 3px; color: var(--muted); font-size: 9px; }

/* Footer and fixed contact */
.material-footer { background: #070907; color: var(--white); }
.footer-inner { display: grid; grid-template-columns: 1.2fr 1fr .8fr; gap: 50px; align-items: center; padding: 54px 0; }
.brand-footer img { width: 48px; height: 48px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 8px; }
.footer-links a { display: inline-flex; align-items: center; gap: 8px; padding: 10px 12px; border: 1px solid var(--line-light); color: rgba(255,255,255,.68); font-size: 10px; }
.footer-links a span { color: var(--accent); font-family: "SFMono-Regular", Consolas, monospace; font-size: 8px; }
.footer-links a:hover { border-color: var(--accent); color: var(--white); }
.footer-contact { display: flex; flex-direction: column; align-items: flex-end; gap: 6px; color: rgba(255,255,255,.56); font-size: 10px; }
.footer-contact a:hover { color: var(--accent); }
.footer-bottom { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 17px 0; border-top: 1px solid var(--line-light); color: rgba(255,255,255,.4); font-size: 9px; }
.floating-contact { position: fixed; z-index: 90; right: 18px; bottom: 18px; display: flex; flex-direction: column; gap: 6px; }
.floating-contact a { min-width: 52px; min-height: 42px; display: grid; place-items: center; border-radius: 22px; background: var(--ink); color: var(--white); font-size: 10px; font-weight: 750; box-shadow: 0 8px 28px rgba(16,19,16,.16); }
.floating-contact .whatsapp-link { background: #1ebe5d; }
.floating-contact .wechat-link { background: var(--wechat); }

/* Responsive */
@media (max-width: 1180px) {
  :root { --shell: min(1400px, calc(100vw - 56px)); }
  .header-link { display: none; }
  .hero-grid { grid-template-columns: minmax(0,1fr) minmax(390px,.78fr); gap: 42px; }
  .product-grid, .factory-grid, .video-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .delivery-grid, .machine-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
}
@media (max-width: 900px) {
  .header-inner { flex-wrap: wrap; padding: 13px 0; gap: 12px; }
  .brand { order: 1; }
  .header-actions { order: 2; }
  .material-nav { order: 3; width: 100%; border-top: 1px solid var(--line); padding-top: 10px; overflow-x: auto; }
  .material-nav a { flex: 1; text-align: center; white-space: nowrap; }
  .hero-grid, .section-head, .strength-grid, .contact-grid { grid-template-columns: 1fr; }
  .section-head { gap: 28px; }
  .hero-media { order: -1; }
  .material-video-card, .video-placeholder { height: 560px; }
  .material-video-card.video-horizontal { height: auto; }
  .application-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .footer-contact { align-items: flex-start; }
}
@media (max-width: 640px) {
  :root { --shell: calc(100vw - 32px); }
  .topbar-inner { min-height: 34px; font-size: 10px; }
  .topbar-inner a { display: none; }
  .header-inner { min-height: 66px; }
  .brand img { width: 40px; height: 40px; }
  .brand strong { font-size: 17px; }
  .brand small { font-size: 7px; }
  .header-actions { display: none; }
  .material-nav a { padding: 9px 8px; font-size: 11px; }
  .material-hero { padding: 40px 0 64px; }
  .hero-copy h1 { font-size: clamp(46px,14vw,66px); }
  .hero-intro { font-size: 14px; }
  .hero-actions { flex-direction: column; }
  .hero-actions .button { width: 100%; }
  .material-video-card, .video-placeholder { height: 470px; }
  .material-video-card figcaption { align-items: flex-start; flex-direction: column; gap: 4px; }
  .material-strip .shell { min-height: 60px; gap: 7px; overflow-x: auto; }
  .material-strip span { font-size: 9px; white-space: nowrap; }
  .material-strip i { min-width: 16px; }
  .material-section { padding: 74px 0; }
  .section-head h2 { font-size: clamp(40px,12vw,58px); }
  .product-grid, .factory-grid, .video-grid, .delivery-grid, .machine-grid, .application-grid { grid-template-columns: 1fr; }
  .product-card-wide { grid-column: auto; }
  .product-card-wide .product-media { aspect-ratio: 1 / 1; }
  .media-frame { aspect-ratio: 4 / 5; }
  .application-card { min-height: 320px; }
  .empty-card > div, .contact-actions { flex-direction: column; }
  .empty-card .button, .contact-actions .button { width: 100%; }
  .contact-qr { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: 28px; padding: 46px 0; }
  .footer-bottom { align-items: flex-start; flex-direction: column; }
  .floating-contact { right: 10px; bottom: 10px; }
  .floating-contact a { min-width: 46px; min-height: 38px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
}


/* Final video treatment: option B */
.material-video-card,
.media-frame {
  background: #f5f2ea;
  border-radius: 14px;
  overflow: hidden;
}
.material-video-card {
  box-shadow: 0 18px 54px rgba(16,19,16,.12);
}
.material-video-card video,
.media-frame > video {
  object-fit: cover;
  background: #f5f2ea;
}
.media-card {
  border: 1px solid rgba(16,19,16,.1);
  border-radius: 14px;
  overflow: hidden;
  background: #fff;
  box-shadow: 0 12px 30px rgba(16,19,16,.06);
}
.media-copy {
  padding: 17px 17px 19px;
}
.media-kind {
  border-radius: 10px;
}
.factory-section .media-card {
  background: #f7f5ef;
  border-color: rgba(255,255,255,.25);
}
.factory-section .media-copy h3 {
  color: var(--ink);
}
.factory-section .media-copy p {
  color: var(--muted);
}

/* Final contact treatment: option C */
.material-contact {
  padding: 96px 0 92px;
  background: #e6e1d6;
  color: var(--ink);
}
.contact-redesign {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
}
.contact-intro {
  display: grid;
  grid-template-columns: 1fr .72fr;
  gap: clamp(48px,7vw,104px);
  align-items: end;
}
.material-contact h2 {
  margin-top: 18px;
  font-size: clamp(50px,5.8vw,88px);
}
.contact-intro-copy > p {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.9;
}
.contact-person {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 5px 18px;
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid rgba(16,19,16,.2);
}
.contact-person span {
  grid-column: 1 / -1;
  color: var(--muted);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 8px;
  letter-spacing: .12em;
}
.contact-person strong {
  font-size: 24px;
  letter-spacing: -.04em;
}
.contact-person a {
  align-self: end;
  font-size: 12px;
  font-weight: 750;
}
.contact-person a:hover { color: var(--accent); }
.contact-services {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}
.contact-service {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  padding: 26px 30px 26px 34px;
  background: #f6f3eb;
  border: 1px solid rgba(16,19,16,.24);
  box-shadow: none;
}
.contact-service::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 5px;
  background: #168f48;
}
.contact-service-wechat::before { background: var(--wechat); }
.contact-service-head > span {
  color: var(--accent);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 8px;
  letter-spacing: .12em;
}
.contact-service h3 {
  margin-top: 7px;
  font-size: clamp(26px,2.7vw,38px);
  letter-spacing: -.045em;
}
.contact-service-head p {
  margin-top: 7px;
  color: var(--muted);
  font-size: 10px;
  line-height: 1.65;
}
.contact-service-body {
  display: grid;
  grid-template-columns: 128px 1fr;
  gap: 22px;
  align-items: center;
}
.contact-service-body > img {
  width: 128px;
  height: 128px;
  padding: 8px;
  object-fit: contain;
  background: var(--white);
  border: 1px solid var(--line);
}
.contact-service-body > div {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
}
.contact-service-body small {
  color: var(--muted);
  font-size: 9px;
}
.contact-service-body > div > span {
  color: var(--muted);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 8px;
}
.contact-channel-button {
  min-height: 44px;
  width: min(100%, 300px);
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 0 15px;
  background: var(--ink);
  color: var(--white);
  font-size: 11px;
  font-weight: 750;
  transition: transform .2s, background .2s;
}
.contact-channel-button b {
  color: rgba(255,255,255,.76);
  font-size: 14px;
}
.contact-channel-button:hover {
  transform: translateY(-2px);
}
.contact-service-wa .contact-channel-button { background: #168f48; }
.contact-service-wechat .contact-channel-button { background: var(--wechat); }
.contact-service-wa .contact-channel-button:hover,
.contact-service-wechat .contact-channel-button:hover { background: var(--ink); }
@media (max-width: 1040px) {
  .contact-intro { grid-template-columns: 1fr; gap: 26px; }
}
@media (max-width: 720px) {
  .material-contact { padding: 74px 0; }
  .contact-service {
    grid-template-columns: 1fr;
    gap: 22px;
    padding: 22px 20px 22px 24px;
  }
  .contact-service-body { grid-template-columns: 112px 1fr; gap: 14px; }
  .contact-service-body > img { width: 112px; height: 112px; }
  .contact-intro-copy > p { font-size: 13px; }
}
@media (max-width: 430px) {
  .contact-service-body { grid-template-columns: 1fr; align-items: stretch; }
  .contact-service-body > img { width: 100%; max-width: 180px; height: auto; margin-inline: auto; }
  .contact-service-body > div { align-items: stretch; }
  .contact-channel-button { width: 100%; }
}


/* Light factory showcase */
.factory-section {
  background: #e6e1d6;
  color: var(--ink);
}
.factory-section .section-head-light { color: var(--ink); }
.factory-section .section-head-light > p { color: var(--muted); }
.factory-showcase {
  display: grid;
  grid-template-columns: 1.25fr .75fr;
  min-height: 520px;
  margin-bottom: 14px;
  background: #f6f3eb;
  border: 1px solid rgba(16,19,16,.18);
  overflow: hidden;
}
.factory-photo {
  position: relative;
  min-height: 520px;
  overflow: hidden;
  background: #d3cec3;
}
.factory-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.factory-photo::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(16,19,16,.72));
  pointer-events: none;
}
.factory-photo figcaption {
  position: absolute;
  z-index: 1;
  left: 24px;
  right: 24px;
  bottom: 22px;
  color: var(--white);
}
.factory-photo figcaption span {
  display: block;
  color: #ff8a68;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 8px;
  letter-spacing: .13em;
}
.factory-photo figcaption strong {
  display: block;
  margin-top: 7px;
  font-size: 20px;
  letter-spacing: -.03em;
}
.factory-photo-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(30px, 4vw, 58px);
  border-left: 1px solid rgba(16,19,16,.16);
}
.factory-photo-copy h3 {
  margin-top: 16px;
  font-size: clamp(38px, 3.9vw, 60px);
  letter-spacing: -.055em;
  line-height: .98;
}
.factory-photo-copy > p:not(.kicker) {
  margin-top: 22px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.8;
}
.factory-facts {
  display: grid;
  margin-top: 28px;
  border-top: 1px solid rgba(16,19,16,.16);
}
.factory-facts > div {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 10px;
  padding: 12px 0;
  border-bottom: 1px solid rgba(16,19,16,.16);
}
.factory-facts dt {
  color: #d44622;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 9px;
}
.factory-facts dd {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  margin: 0;
}
.factory-facts strong { font-size: 11px; }
.factory-facts span { color: var(--muted); font-size: 9px; text-align: right; }
.factory-section .media-card {
  background: var(--white);
  border-color: rgba(16,19,16,.14);
  box-shadow: 0 10px 28px rgba(16,19,16,.06);
}
.factory-section .media-copy h3 { color: var(--ink); }
.factory-section .media-copy p { color: var(--muted); }
@media (max-width: 1040px) {
  .factory-showcase { grid-template-columns: 1fr; }
  .factory-photo { min-height: 460px; }
  .factory-photo-copy { border-left: 0; border-top: 1px solid rgba(16,19,16,.16); }
}
@media (max-width: 640px) {
  .factory-photo { min-height: 330px; }
  .factory-photo-copy { padding: 26px 20px 30px; }
  .factory-facts dd { flex-direction: column; gap: 3px; }
  .factory-facts span { text-align: left; }
}

/* PVC factory surface gallery */
.factory-surface-gallery {
  margin-top: 14px;
  padding: clamp(22px, 3vw, 40px);
  background: #f6f3eb;
  border: 1px solid rgba(16,19,16,.16);
}
.factory-surface-head {
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(260px, .45fr);
  gap: clamp(24px, 5vw, 80px);
  align-items: end;
  margin-bottom: 20px;
}
.factory-surface-head h3 {
  margin-top: 10px;
  font-size: clamp(28px, 3.1vw, 46px);
  line-height: .98;
  letter-spacing: -.055em;
}
.factory-surface-head > p {
  margin: 0;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.75;
}
.factory-surface-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}
.factory-surface-card {
  position: relative;
  min-width: 0;
  aspect-ratio: 1 / 1;
  margin: 0;
  overflow: hidden;
  background: #171917;
}
.factory-surface-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .55s ease, filter .25s ease;
}
.factory-surface-card::after {
  content: "";
  position: absolute;
  inset: 35% 0 0;
  background: linear-gradient(180deg, transparent, rgba(10,12,10,.82));
  pointer-events: none;
}
.factory-surface-copy {
  position: absolute;
  z-index: 1;
  left: 12px;
  right: 12px;
  bottom: 12px;
  color: var(--white);
}
.factory-surface-copy span {
  display: block;
  color: #ff9a78;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 7px;
  letter-spacing: .1em;
  white-space: nowrap;
}
.factory-surface-copy strong {
  display: block;
  margin-top: 5px;
  font-size: clamp(12px, 1.15vw, 16px);
  letter-spacing: -.02em;
}
.factory-surface-card:hover img {
  transform: scale(1.045);
  filter: saturate(1.04) contrast(1.02);
}
@media (max-width: 1100px) {
  .factory-surface-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (max-width: 720px) {
  .factory-surface-head { grid-template-columns: 1fr; gap: 14px; }
  .factory-surface-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .factory-surface-gallery { padding: 22px 18px; }
}

/* PET product detail showcase */
.detail-showcase-section { background: #f6f3eb; }
.detail-showcase-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 13px;
}
.detail-showcase-card {
  min-width: 0;
  background: var(--white);
  border: 1px solid rgba(16,19,16,.12);
  overflow: hidden;
}
.detail-showcase-media {
  aspect-ratio: 4 / 5;
  overflow: hidden;
  background: #e7e3da;
}
.detail-showcase-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .55s ease, filter .25s ease;
}
.detail-showcase-card:hover .detail-showcase-media img {
  transform: scale(1.035);
  filter: saturate(1.03);
}
.detail-showcase-copy { padding: 16px 17px 18px; }
.detail-showcase-copy span {
  color: var(--accent);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 8px;
  letter-spacing: .1em;
}
.detail-showcase-copy h3 {
  margin-top: 6px;
  font-size: 22px;
  letter-spacing: -.04em;
}
.detail-showcase-copy p {
  margin-top: 6px;
  color: var(--muted);
  font-size: 10px;
  line-height: 1.65;
}
@media (max-width: 900px) {
  .detail-showcase-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 560px) {
  .detail-showcase-grid { grid-template-columns: 1fr; }
  .detail-showcase-media { aspect-ratio: 1 / 1; }
}

/* PET hero video enlargement */
@media (min-width: 1000px) {
  body.material-pet .hero-grid {
    grid-template-columns: minmax(0, .74fr) minmax(540px, 1fr);
    gap: clamp(38px, 4.5vw, 72px);
  }
  body.material-pet .material-video-card.video-horizontal {
    width: 100%;
  }
}

@media (min-width: 1000px) {
  body.material-pet .hero-copy h1 {
    font-size: clamp(58px, 5.5vw, 84px);
    letter-spacing: -.065em;
    white-space: nowrap;
  }
}

/* PC six-material collage */
body.material-pc #detail-showcase { background: #f7f4ec; }
body.material-pc #detail-showcase .detail-showcase-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  grid-auto-flow: dense;
}
body.material-pc #detail-showcase .detail-showcase-card {
  border-color: rgba(16,19,16,.18);
}
body.material-pc #detail-showcase .detail-showcase-card:nth-child(1),
body.material-pc #detail-showcase .detail-showcase-card:nth-child(6) {
  grid-column: span 2;
}
body.material-pc #detail-showcase .detail-showcase-card:nth-child(1) .detail-showcase-media,
body.material-pc #detail-showcase .detail-showcase-card:nth-child(6) .detail-showcase-media {
  aspect-ratio: 16 / 9;
}
body.material-pc #detail-showcase .detail-showcase-copy h3 { font-size: 23px; }
@media (max-width: 900px) {
  body.material-pc #detail-showcase .detail-showcase-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  body.material-pc #detail-showcase .detail-showcase-card:nth-child(1),
  body.material-pc #detail-showcase .detail-showcase-card:nth-child(6) {
    grid-column: auto;
  }
  body.material-pc #detail-showcase .detail-showcase-card:nth-child(1) .detail-showcase-media,
  body.material-pc #detail-showcase .detail-showcase-card:nth-child(6) .detail-showcase-media {
    aspect-ratio: 1 / 1;
  }
}
@media (max-width: 560px) {
  body.material-pc #detail-showcase .detail-showcase-grid {
    grid-template-columns: 1fr;
  }
}
/* PC hero video emphasis */
@media (min-width: 1100px) {
  body.material-pc .hero-grid {
    grid-template-columns: minmax(0, .86fr) minmax(560px, .94fr);
    gap: clamp(28px, 3.2vw, 48px);
  }
  body.material-pc .hero-copy h1 {
    font-size: clamp(54px, 6.2vw, 92px);
    letter-spacing: -.065em;
  }
  body.material-pc .hero-media {
    width: calc(100% + 28px);
    justify-self: end;
    margin-right: -28px;
  }
  body.material-pc .material-video-card.video-horizontal {
    width: 100%;
    max-height: none;
  }
}
/* Acrylic hero video emphasis */
@media (min-width: 1100px) {
  body.material-acrylic .hero-grid {
    grid-template-columns: minmax(0, .86fr) minmax(560px, .94fr);
    gap: clamp(28px, 3.2vw, 48px);
  }
  body.material-acrylic .hero-copy h1 {
    font-size: clamp(54px, 6.2vw, 92px);
    letter-spacing: -.065em;
  }
  body.material-acrylic .hero-media {
    width: calc(100% + 28px);
    justify-self: end;
    margin-right: -28px;
  }
  body.material-acrylic .material-video-card.video-horizontal {
    width: 100%;
    max-height: none;
  }
}
/* Language switch and English typography */
.material-nav .language-switch {
  flex: 0 0 auto;
  margin-left: 8px;
  border-color: var(--ink);
  background: var(--ink);
  color: var(--white);
  font-family: "SFMono-Regular", Consolas, monospace;
  letter-spacing: .12em;
}
.material-nav .language-switch:hover { border-color: var(--accent); background: var(--accent); color: var(--ink); }
html[lang="en"] body { font-family: Arial, "Helvetica Neue", sans-serif; }
html[lang="en"] .hero-copy h1 { max-width: 760px; font-size: clamp(46px, 5.4vw, 78px); line-height: .94; letter-spacing: -.052em; }
html[lang="en"] .section-head h2, html[lang="en"] .strength-copy h2, html[lang="en"] .material-contact h2, html[lang="en"] .empty-card h2 { letter-spacing: -.045em; line-height: 1; }
html[lang="en"] .section-head h2 { font-size: clamp(42px, 4.8vw, 70px); }
html[lang="en"] .contact-intro h2 { letter-spacing: -.045em; }
@media (max-width: 900px) {
  .material-nav .language-switch { margin-left: 0; }
}
@media (max-width: 640px) {
  html[lang="en"] .hero-copy h1 { font-size: clamp(42px, 12vw, 62px); }
  html[lang="en"] .section-head h2 { font-size: clamp(36px, 10.5vw, 54px); }
}

/* Floating contact buttons: QR-only behavior */
.floating-contact button {
  min-width: 52px;
  min-height: 42px;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 2px;
  padding: 5px 8px;
  border: 0;
  border-radius: 22px;
  background: var(--ink);
  color: var(--white);
  font-size: 10px;
  font-weight: 750;
  box-shadow: 0 8px 28px rgba(16,19,16,.16);
  cursor: pointer;
}
.floating-contact button span { font-size: 10px; line-height: 1; }
.floating-contact button small { font: 700 7px/1 "SFMono-Regular", Consolas, monospace; letter-spacing: .03em; opacity: .72; }
.floating-contact button[data-contact="whatsapp"] { background: #1ebe5d; }
.floating-contact button[data-contact="wechat"] { background: var(--wechat); }
.floating-contact button[data-contact="phone"] { background: var(--ink); }
.floating-contact button[aria-expanded="true"] { transform: translateX(-3px); box-shadow: 0 10px 32px rgba(16,19,16,.28); }

.contact-qr-panel {
  position: fixed;
  z-index: 120;
  right: 18px;
  bottom: 174px;
  width: min(360px, calc(100vw - 36px));
  padding: 18px;
  background: #f7f1e5;
  color: #171610;
  border: 1px solid rgba(23,22,16,.22);
  box-shadow: 0 22px 60px rgba(10,12,10,.24);
}
.contact-qr-panel[hidden] { display: none; }
.contact-qr-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 20px; }
.contact-qr-head span { display: block; color: var(--accent); font: 700 8px/1.4 "SFMono-Regular", Consolas, monospace; letter-spacing: .12em; }
.contact-qr-head strong { display: block; margin-top: 6px; font-size: 21px; letter-spacing: -.04em; }
.contact-qr-close { width: 34px; height: 34px; flex: 0 0 auto; border: 1px solid rgba(23,22,16,.28); background: transparent; color: #171610; font-size: 22px; line-height: 1; cursor: pointer; }
.contact-qr-view { margin-top: 16px; text-align: center; }
.contact-qr-view[hidden] { display: none; }
.contact-qr-view img { width: min(100%, 280px); margin-inline: auto; aspect-ratio: 1 / 1; object-fit: contain; background: #fff; }
.contact-qr-view > span { display: block; margin-top: 10px; color: var(--accent); font: 700 8px/1.2 "SFMono-Regular", Consolas, monospace; letter-spacing: .12em; }
.contact-qr-view > strong { display: block; margin-top: 6px; font-size: 18px; }
.contact-qr-view > p { margin-top: 8px; color: #6b675d; font-size: 10px; line-height: 1.6; }
.contact-phone-view { min-height: 250px; display: flex; flex-direction: column; align-items: center; justify-content: center; background: #fff; border: 1px solid rgba(23,22,16,.14); }
.contact-phone-view > strong { font-size: 26px; letter-spacing: -.04em; }
@media (max-width: 520px) {
  .contact-qr-panel { right: 12px; bottom: 158px; width: calc(100vw - 24px); padding: 16px; }
  .contact-phone-view > strong { font-size: 23px; }
}