:root {
  --navy: #0b2748;
  --navy-deep: #061a2d;
  --blue: #155e9a;
  --air: #33a7d8;
  --ice: #eaf4f8;
  --paper: #f5f9fb;
  --graphite: #263746;
  --orange: #f2a43a;
  --line: rgba(51,167,216,.30);
  --shadow: 0 26px 70px rgba(4,22,38,.26);
  --sans: "Source Han Sans SC", "Noto Sans CJK SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --display: "Avenir Next Condensed", "Arial Narrow", var(--sans);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--navy); }
body { margin: 0; color: #fff; font-family: var(--sans); overflow: hidden; }
button, input, select, textarea { font: inherit; }
a { color: inherit; }

.topbar {
  position: fixed; inset: 0 0 auto; z-index: 40; height: 76px; padding: 0 clamp(22px,4vw,64px);
  display: flex; align-items: center; justify-content: space-between;
  background: linear-gradient(to bottom,rgba(4,20,35,.88),rgba(4,20,35,0)); pointer-events: none;
}
.topbar > * { pointer-events: auto; }
.brand { display: flex; align-items: center; gap: 14px; text-decoration: none; }
.brand strong { display: block; font: 800 18px/1 var(--display); letter-spacing: .18em; }
.brand small { display: block; margin-top: 6px; color: rgba(255,255,255,.58); font-size: 9px; letter-spacing: .08em; white-space: nowrap; }
.brand-mark { width: 34px; height: 34px; position: relative; display: block; }
.brand-mark i { position: absolute; inset: 4px; border: 1px solid var(--air); border-left-color: transparent; border-bottom-color: transparent; border-radius: 50%; transform: rotate(20deg); }
.brand-mark i:nth-child(2) { inset: 9px; }
.brand-mark i:nth-child(3) { inset: 14px; background: var(--air); border: 0; }
.top-actions { display: flex; align-items: center; gap: 22px; }
.slide-counter { display: flex; align-items: center; gap: 8px; font: 12px/1 var(--display); letter-spacing: .16em; color: rgba(255,255,255,.58); }
.slide-counter b { color: #fff; font-size: 16px; }
.slide-counter i { width: 26px; height: 1px; background: rgba(255,255,255,.32); }
.language-picker { position: relative; }
.language-toggle { height: 40px; display: flex; align-items: center; gap: 8px; padding: 0 14px; border-radius: 999px; border: 1px solid rgba(255,255,255,.24); background: rgba(4,20,35,.62); color: #fff; cursor: pointer; backdrop-filter: blur(14px); }
.globe { color: var(--air); font-size: 19px; }
.language-menu { position: absolute; right: 0; top: calc(100% + 10px); width: min(250px,calc(100vw - 32px)); max-height: 70vh; overflow: auto; padding: 8px; border-radius: 18px; background: rgba(4,20,35,.98); border: 1px solid rgba(255,255,255,.16); box-shadow: var(--shadow); }
.language-menu button { width: 100%; padding: 11px 13px; text-align: left; color: rgba(255,255,255,.82); background: transparent; border: 0; border-radius: 10px; cursor: pointer; }
.language-menu button:hover, .language-menu button.active { color: #fff; background: rgba(51,167,216,.18); }
.language-toggle:focus-visible, .language-menu button:focus-visible, .slide-nav button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible, button:focus-visible { outline: 3px solid var(--orange); outline-offset: 3px; }

.slides { height: 100svh; overflow-y: auto; scroll-snap-type: y mandatory; overscroll-behavior-y: contain; }
.slide { position: relative; min-height: 100svh; scroll-snap-align: start; scroll-snap-stop: always; display: grid; align-items: center; overflow: hidden; }
.hero, .products, .promise { background: var(--navy); }
.applications { background: var(--paper); color: var(--graphite); }
.contact { background: linear-gradient(125deg,var(--navy-deep) 0 40%,var(--blue) 40% 100%); }
.slide-grid { width: min(1440px,100%); margin: auto; padding: 100px clamp(26px,7vw,108px) 72px; }
.copy { position: relative; z-index: 3; max-width: 720px; }
.eyebrow { margin: 0 0 20px; color: var(--air); font: 750 12px/1 var(--display); letter-spacing: .19em; text-transform: uppercase; }
.eyebrow::before { content: ""; display: inline-block; width: 44px; height: 3px; margin: 0 12px 3px 0; background: var(--air); }
.eyebrow.dark { color: var(--blue); }
h1, h2 { margin: 0; font-family: var(--display); font-weight: 800; letter-spacing: -.035em; text-wrap: balance; }
h1 { max-width: 780px; font-size: clamp(54px,5.7vw,94px); line-height: .94; text-transform: uppercase; }
h2 { font-size: clamp(42px,5vw,76px); line-height: .98; }
.lead { max-width: 720px; margin: 24px 0 0; color: rgba(255,255,255,.72); font-size: clamp(15px,1.3vw,20px); line-height: 1.7; }
.lead.dark { color: #596a78; }
.primary-action { display: inline-flex; gap: 24px; align-items: center; margin-top: 30px; padding: 13px 16px 13px 21px; border: 1px solid rgba(255,255,255,.26); border-radius: 999px; text-decoration: none; transition: .25s ease; }
.primary-action b { width: 30px; height: 30px; display: grid; place-items: center; border-radius: 50%; background: var(--air); color: var(--navy-deep); }
.primary-action:hover { background: #fff; color: var(--navy); transform: translateY(-2px); }

[lang^="zh"] h1, [lang^="zh"] h2 { font-family: var(--sans); font-weight: 780; line-height: 1.08; letter-spacing: .025em; text-transform: none; text-wrap: pretty; }
[lang^="zh"] h1 { font-size: clamp(52px,5.1vw,82px); }
[lang^="zh"] h2 { font-size: clamp(40px,4.35vw,66px); }
[lang^="zh"] .eyebrow { font-family: var(--sans); letter-spacing: .12em; text-transform: none; }
[lang^="zh"] .lead, [lang^="zh"] h3, [lang^="zh"] label, [lang^="zh"] .section-cta { letter-spacing: .025em; }

.hero-grid { display: grid; grid-template-columns: minmax(360px,.76fr) minmax(500px,1.24fr); gap: clamp(30px,4vw,74px); align-items: center; }
.hero .copy { max-width: 560px; padding-left: clamp(0px,1.2vw,18px); }
.hero h1 { max-width: 600px; font-size: clamp(50px,4.25vw,68px); line-height: .98; letter-spacing: -.025em; }
.hero .lead { max-width: 505px; margin-top: 20px; font-size: clamp(15px,1.1vw,17px); line-height: 1.75; }
.hero .primary-action { margin-top: 27px; }
[lang^="zh"] .hero h1 { max-width: 520px; font-size: clamp(48px,4vw,62px); line-height: 1.12; letter-spacing: .035em; }

/* English needs a quieter, wider reading rhythm than the condensed Chinese display treatment. */
[lang="en"] .hero .copy { max-width: 680px; }
[lang="en"] .hero .eyebrow { max-width: 610px; font-family: var(--sans); font-size: 11px; line-height: 1.42; letter-spacing: .12em; }
[lang="en"] .hero h1 { max-width: 680px; font-size: clamp(44px,3.8vw,62px); line-height: .98; letter-spacing: -.04em; }
[lang="en"] .hero .lead { max-width: 570px; margin-top: 24px; font-size: clamp(16px,1.2vw,18px); line-height: 1.78; letter-spacing: 0; }

@media (min-width:981px) {
  [lang="en"] .hero-grid { grid-template-columns: minmax(470px,1fr) minmax(430px,1fr); gap: clamp(30px,3vw,52px); }
}

/* A separate English reading rhythm: more open than the compact CJK treatment. */
[lang="en"] body { font-family: "Avenir Next", "Helvetica Neue", Arial, sans-serif; letter-spacing: .004em; }
[lang="en"] h1, [lang="en"] h2 { letter-spacing: -.02em; line-height: 1.05; text-wrap: balance; }
[lang="en"] .hero h1 { letter-spacing: -.03em; line-height: 1; }
[lang="en"] .lead { letter-spacing: .005em; line-height: 1.72; }
[lang="en"] .section-heading h2 { letter-spacing: -.018em; line-height: 1.06; }
[lang="en"] .section-heading .lead { line-height: 1.68; }
[lang="en"] .application-grid h3 { letter-spacing: -.01em; line-height: 1.26; }
[lang="en"] .application-grid p { letter-spacing: .004em; line-height: 1.58; }
[lang="en"] .product-grid h3 { letter-spacing: .004em; line-height: 1.42; }
[lang="en"] .principles h3 { letter-spacing: -.01em; line-height: 1.24; }
[lang="en"] .principles p { letter-spacing: .004em; line-height: 1.65; }
[lang="en"] .field label { letter-spacing: .055em; }
[lang="en"] .form-note { letter-spacing: .004em; line-height: 1.6; }

@media (min-width:981px) {
  [lang="en"] .promise-wrap { grid-template-columns: minmax(430px,1fr) minmax(500px,1fr); gap: clamp(44px,5vw,78px); }
  [lang="en"] .promise .copy h2 { font-size: clamp(46px,5vw,74px); line-height: 1.02; letter-spacing: -.025em; }
}

/* Final English typography: normal-width industrial sans, optical kerning and generous leading. */
[lang="en"] { font-kerning: normal; text-rendering: optimizeLegibility; }
[lang="en"] h1, [lang="en"] h2 {
  font-family: "Avenir Next", "Helvetica Neue", Arial, sans-serif;
  font-weight: 750;
  letter-spacing: -.025em;
  line-height: 1.08;
}
[lang="en"] .hero h1 { letter-spacing: -.028em; line-height: 1.04; }
[lang="en"] .section-heading h2 { font-size: clamp(38px,3.8vw,56px); line-height: 1.1; }
[lang="en"] .contact-intro h2 { line-height: 1.08; }
[lang="en"] h3, [lang="en"] .section-cta, [lang="en"] .primary-action, [lang="en"] .submit-button { font-family: "Avenir Next", "Helvetica Neue", Arial, sans-serif; }
[lang="en"] .lead { letter-spacing: .008em; line-height: 1.8; }
[lang="en"] .section-heading .lead { line-height: 1.72; }
[lang="en"] .application-grid h3 { letter-spacing: -.004em; line-height: 1.32; }
[lang="en"] .application-grid p { letter-spacing: .007em; line-height: 1.65; }
[lang="en"] .product-grid h3 { letter-spacing: .008em; line-height: 1.48; }
[lang="en"] .principles h3 { letter-spacing: -.004em; line-height: 1.3; }
[lang="en"] .principles p { letter-spacing: .007em; line-height: 1.7; }
[lang="en"] .field label { letter-spacing: .045em; }
[lang="en"] .form-note { letter-spacing: .006em; line-height: 1.65; }

@media (min-width:981px) {
  [lang="en"] .hero-grid { grid-template-columns: minmax(560px,1.08fr) minmax(390px,.92fr); gap: clamp(28px,2.4vw,42px); }
  [lang="en"] .section-heading { grid-template-columns: .32fr 1.68fr; gap: 28px; }
  [lang="en"] .promise-wrap { grid-template-columns: minmax(470px,1fr) minmax(470px,1fr); gap: clamp(42px,5vw,72px); }
  [lang="en"] .promise .copy h2 { font-size: clamp(44px,4.5vw,68px); line-height: 1.06; letter-spacing: -.028em; }
  [lang="en"] .contact-intro h2 { font-size: clamp(42px,4vw,58px); }
}

.hero-machine-stage { position: relative; z-index: 2; width: min(100%,760px); min-height: min(68vh,620px); margin: 0; display: grid; place-items: center; overflow: visible; }
.hero-machine-stage::before { content: ""; position: absolute; width: 80%; aspect-ratio: 1; border-radius: 50%; background: radial-gradient(circle,rgba(51,167,216,.14),rgba(51,167,216,.04) 48%,transparent 70%); filter: blur(7px); }
.hero-fan-render { position: relative; z-index: 2; width: min(78%,600px); height: auto; max-width: none; display: block; transform: translateY(8px); user-select: none; pointer-events: none; filter: drop-shadow(0 30px 35px rgba(0,0,0,.30)); }

.airflow { position: absolute; pointer-events: none; }
.airflow i { position: absolute; display: block; border: 1px solid rgba(51,167,216,.25); border-radius: 50%; }
.airflow-hero { width: min(62vw,900px); height: min(62vw,900px); right: -16vw; top: -21vw; opacity: .72; }
.airflow-hero i { inset: calc(var(--i,0) * 48px); }
.airflow-hero i:nth-child(1){--i:0}.airflow-hero i:nth-child(2){--i:1}.airflow-hero i:nth-child(3){--i:2}

.section-heading { width: 100%; display: grid; grid-template-columns: .42fr 1.58fr; gap: 38px; align-items: end; }
.section-heading .eyebrow { margin: 0 0 8px; align-self: start; }
.section-heading h2 { font-size: clamp(36px,4.1vw,62px); }
.section-heading .lead { margin-top: 12px; font-size: 15px; line-height: 1.55; }
.applications-wrap, .products-wrap { width: min(1280px,100%); margin: auto; padding: 92px clamp(26px,6vw,84px) 74px; }
.application-grid { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 14px; margin-top: 28px; }
.application-grid article { position: relative; min-height: clamp(305px,46vh,390px); overflow: hidden; background: var(--navy); box-shadow: 0 14px 35px rgba(11,39,72,.15); }
.application-grid img { width: 100%; height: 100%; display: block; object-fit: cover; transition: transform .55s cubic-bezier(.22,1,.36,1); }
.application-grid article::after { content: ""; position: absolute; inset: 35% 0 0; background: linear-gradient(to bottom,transparent,rgba(4,20,35,.94)); }
.application-grid article > div { position: absolute; z-index: 2; inset: auto 20px 20px; color: #fff; }
.application-grid h3 { margin: 0; font-size: clamp(18px,1.7vw,25px); line-height: 1.18; }
.application-grid p { margin: 8px 0 0; color: rgba(255,255,255,.65); font-size: 12px; line-height: 1.5; }
.application-grid article:hover img { transform: scale(1.045); }

.products-wrap .section-heading { margin-bottom: 24px; }
.product-grid { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 12px; }
.product-grid article { min-width: 0; background: rgba(255,255,255,.065); border: 1px solid rgba(255,255,255,.13); transition: transform .25s ease,border-color .25s ease; }
.product-grid article:hover { transform: translateY(-3px); border-color: rgba(51,167,216,.6); }
.product-photo { height: clamp(105px,17vh,145px); background-repeat: no-repeat; background-color: var(--ice); border-bottom: 1px solid rgba(255,255,255,.11); }
.product-1,.product-2,.product-3,.product-4 { background-image: url('/assets/product-family-01.png'); background-size: 215% auto; }
.product-5,.product-6,.product-7,.product-8 { background-image: url('/assets/product-family-02.png'); background-size: 215% auto; }
.product-1,.product-5 { background-position: 8% 25%; }.product-2,.product-6 { background-position: 92% 25%; }
.product-3,.product-7 { background-position: 8% 82%; }.product-4,.product-8 { background-position: 92% 82%; }
.product-grid h3 { min-height: 50px; margin: 0; padding: 13px 14px; display: flex; align-items: center; font-size: 13px; line-height: 1.3; }

.promise-wrap { width: min(1380px,100%); margin: auto; padding: 100px clamp(26px,7vw,108px) 72px; display: grid; grid-template-columns: .82fr 1.18fr; gap: clamp(55px,8vw,140px); align-items: center; }
.promise .copy h2 { font-size: clamp(52px,6.8vw,102px); }
.principles { display: grid; gap: 1px; background: rgba(255,255,255,.15); border: 1px solid rgba(255,255,255,.15); }
.principles article { display: grid; grid-template-columns: 148px 42px minmax(0,1fr); grid-template-rows: min-content min-content; align-items: center; gap: 6px 16px; min-height: 130px; padding: 13px 18px; background: rgba(11,39,72,.88); }
.principle-visual { grid-row: 1/3; align-self: stretch; overflow: hidden; background: rgba(255,255,255,.06); }
.principle-visual img { width: 100%; height: 100%; display: block; object-fit: cover; object-position: center; }
.principles article > span { grid-column: 2; grid-row: 1/3; width: 38px; height: 38px; display: grid; place-items: center; border: 1px solid var(--air); border-radius: 50%; color: var(--air); font-weight: 800; }
.principles h3 { grid-column: 3; margin: 0; font-size: 20px; }
.principles p { grid-column: 3; margin: 3px 0 0; color: rgba(255,255,255,.58); font-size: 13px; line-height: 1.55; }
.airflow-promise { width: 65vw; height: 65vw; left: -43vw; bottom: -33vw; }
.airflow-promise i { inset: calc(var(--i,0) * 38px); }
.airflow-promise i:nth-child(1){--i:0}.airflow-promise i:nth-child(2){--i:1}.airflow-promise i:nth-child(3){--i:2}.airflow-promise i:nth-child(4){--i:3}

.section-cta { position: absolute; z-index: 8; right: clamp(48px,6vw,92px); bottom: 26px; display: inline-flex; align-items: center; gap: 18px; padding: 10px 10px 10px 18px; border: 1px solid rgba(255,255,255,.28); border-radius: 999px; color: #fff; background: rgba(4,20,35,.35); text-decoration: none; font-size: 12px; backdrop-filter: blur(12px); transition: .25s ease; }
.section-cta b { width: 28px; height: 28px; display: grid; place-items: center; border-radius: 50%; background: var(--air); color: var(--navy-deep); }
.section-cta:hover { transform: translateY(-2px); background: #fff; color: var(--navy); }
.section-cta.dark-cta { color: var(--navy); border-color: rgba(11,39,72,.25); background: rgba(255,255,255,.68); }

.contact-wrap { width: min(1360px,100%); margin: auto; padding: 92px clamp(26px,7vw,100px) 42px; display: grid; grid-template-columns: .74fr 1.26fr; gap: clamp(45px,7vw,105px); align-items: center; }
.contact-intro { align-self: center; }
.contact-intro h2 { font-size: clamp(46px,5.4vw,78px); }
.company-compact { margin-top: 34px; padding-top: 23px; border-top: 1px solid rgba(255,255,255,.18); }
.company-compact strong { display: block; font: 800 27px/1 var(--display); letter-spacing: .14em; }
.company-compact span,.company-compact small { display: block; margin-top: 9px; }
.company-compact span { font-size: 13px; }.company-compact small { color: rgba(255,255,255,.48); font-size: 8px; letter-spacing: .11em; }
.contact-details { margin: 18px 0 0; display: grid; gap: 12px; }
.contact-details div { display: grid; grid-template-columns: 100px 1fr; gap: 14px; }
.contact-details dt { color: rgba(255,255,255,.48); font-size: 10px; }.contact-details dd { margin: 0; font-size: 11px; line-height: 1.55; }
.contact-details .office-location { grid-template-columns: 1fr; gap: 7px; }
.office-map-frame { position: relative; width: min(100%,440px); aspect-ratio: 16/9; overflow: hidden; border: 1px solid rgba(255,255,255,.25); background: rgba(4,20,35,.48); box-shadow: 0 16px 28px rgba(0,0,0,.14); }
.office-map-frame iframe { position: absolute; inset: 0; width: 100% !important; height: 100% !important; display: block; border: 0; }
.office-location address { margin-top: 11px; color: rgba(255,255,255,.82); font-style: normal; line-height: 1.62; }
.contact-form-area { align-self: end; margin-bottom: 65px; }
.form-intro { max-width: 620px; margin: 0 0 18px; color: rgba(255,255,255,.78); font-size: 15px; line-height: 1.68; }
.inquiry-form { position: relative; display: grid; grid-template-columns: 1fr 1fr; gap: 13px 16px; padding: 25px 28px; background: #fff; color: var(--graphite); box-shadow: var(--shadow); }
.field { display: grid; gap: 6px; }.field-wide { grid-column: 1/-1; }
.phone-control { display: grid; grid-template-columns: 112px minmax(0,1fr); gap: 10px; }
.field label { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; color: #667783; font-size: 10px; letter-spacing: .07em; text-transform: uppercase; }
.field label small { color: #97a5ae; font-size: 8px; font-weight: 500; letter-spacing: .04em; text-transform: none; opacity: .58; }
.field input,.field select,.field textarea { width: 100%; border: 0; border-bottom: 1px solid #cbdbe3; border-radius: 0; padding: 7px 2px 8px; color: var(--navy); background: transparent; outline: none; }
.field #application.is-placeholder { color: #a1acb4; font-size: 12px; }
.field input,.field select { height: 37px; }.field textarea { min-height: 66px; resize: vertical; }
.field input:focus,.field select:focus,.field textarea:focus { border-bottom-color: var(--air); box-shadow: 0 1px 0 var(--air); }
.form-note { grid-column: 1/-1; margin: 0; color: #7b8a95; font-size: 9px; line-height: 1.45; }
.submit-button { grid-column: 2; justify-self: end; display: inline-flex; align-items: center; gap: 16px; padding: 8px 8px 8px 17px; border: 0; border-radius: 999px; background: var(--navy); color: #fff; cursor: pointer; }
.submit-button b { width: 28px; height: 28px; display: grid; place-items: center; border-radius: 50%; background: var(--air); color: var(--navy-deep); }
.form-status { grid-column: 1/-1; min-height: 15px; margin: -4px 0 0; color: var(--blue); font-size: 10px; }
.contact footer { grid-column: 1/-1; display: flex; justify-content: space-between; color: rgba(255,255,255,.45); font-size: 9px; letter-spacing: .07em; }
.contact footer nav { display: flex; gap: 18px; }
.contact footer a { text-decoration: none; }

.slide-nav { position: fixed; right: clamp(14px,2vw,30px); top: 50%; z-index: 30; transform: translateY(-50%); display: grid; gap: 13px; }
.slide-nav button { width: 9px; height: 9px; padding: 0; border: 1px solid rgba(255,255,255,.48); border-radius: 50%; background: transparent; cursor: pointer; transition: .25s ease; }
.slide-nav button.active { background: var(--air); border-color: var(--air); transform: scale(1.55); box-shadow: 0 0 0 4px rgba(51,167,216,.12); }
.applications + .slide-nav button { border-color: var(--navy); }

.reveal { opacity: .001; transform: translateY(24px); transition: opacity .65s ease,transform .65s cubic-bezier(.22,1,.36,1); }
.slide.in-view .reveal { opacity: 1; transform: translateY(0); }
.slide.in-view .delay-1 { transition-delay: .12s; }

@media (min-width:981px) and (max-height:780px) {
  .slide-grid { padding-top: 84px; padding-bottom: 58px; }
  .applications-wrap,.products-wrap { padding-top: 80px; padding-bottom: 58px; }
  .contact-wrap { padding-top: 82px; padding-bottom: 28px; }
  .application-grid { margin-top: 20px; }.application-grid article { min-height: 320px; }
  .product-photo { height: 112px; }.product-grid h3 { min-height: 46px; padding-top: 10px; padding-bottom: 10px; }
  .promise-wrap { padding-top: 86px; padding-bottom: 58px; }
  .company-compact { margin-top: 22px; }.contact-details { margin-top: 13px; }
}

@media (max-width:980px) {
  .slides { scroll-snap-type: y proximity; }
  .slide { min-height: auto; scroll-snap-stop: normal; align-items: start; }
  /* Keep long sections readable even if a mobile browser defers IntersectionObserver callbacks. */
  .slide .reveal { opacity: 1; transform: none; }
  .hero { min-height: 100svh; }
  .hero-grid,.promise-wrap,.contact-wrap { grid-template-columns: 1fr; }
  .hero-grid { padding-top: 122px; gap: 48px; }
  .hero-machine-stage { width: min(720px,96%); min-height: 580px; margin-left: auto; }
  .applications-wrap,.products-wrap,.promise-wrap,.contact-wrap { padding-top: 112px; padding-bottom: 90px; }
  .section-heading { grid-template-columns: 1fr; gap: 10px; }
  .application-grid { grid-template-columns: 1fr 1fr; }
  .application-grid article { min-height: 330px; }
  .product-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .product-photo { height: 180px; }
  .promise-wrap { gap: 50px; }
  .contact { background: linear-gradient(150deg,var(--navy-deep) 0 44%,var(--blue) 44% 100%); }
  .section-cta { position: static; justify-self: end; margin: 0 38px 36px 0; }
  .contact footer { margin-top: 20px; }
}

@media (max-width:680px) {
  .topbar { height: 68px; padding: 0 18px; }
  .brand small,.slide-counter { display: none; }
  .brand { gap: 8px; }.brand-mark { width: 28px; height: 28px; }.brand strong { font-size: 15px; }
  .language-toggle { padding: 0 11px; font-size: 12px; }
  .slide-grid,.applications-wrap,.products-wrap,.promise-wrap,.contact-wrap { padding-left: 22px; padding-right: 22px; }
  h1 { font-size: clamp(43px,12vw,60px); } h2 { font-size: clamp(38px,11vw,56px); }
  [lang^="zh"] h1 { font-size: clamp(43px,11.8vw,56px); } [lang^="zh"] h2 { font-size: clamp(36px,10vw,50px); }
  .hero-grid { gap: 36px; }
  .hero-machine-stage { width: 100%; min-height: 430px; }
  .hero-fan-render { width: 105%; transform: translateY(0); }
  .application-grid { grid-template-columns: 1fr; }.application-grid article { min-height: 255px; }
  .product-grid { gap: 9px; }.product-photo { height: 118px; }.product-grid h3 { min-height: 58px; padding: 11px 10px; font-size: 11px; }
  .principles article { grid-template-columns: 108px 34px minmax(0,1fr); min-height: 116px; gap: 5px 12px; padding: 14px 14px; }.principles article > span { width: 32px; height: 32px; }.principles h3 { font-size: 18px; }.principles p { font-size: 12px; }
  .section-cta { margin-right: 22px; }
  .contact-form-area { margin-bottom: 0; }.form-intro { margin-bottom: 16px; }
  .inquiry-form { grid-template-columns: 1fr; padding: 24px 21px; }.field-wide,.form-note,.form-status { grid-column: 1; }.submit-button { grid-column: 1; }
  .contact-details div { grid-template-columns: 1fr; gap: 5px; }
  .contact footer { flex-direction: column; gap: 13px; }
  .slide-nav { display: none; }
}

@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; }
}