/* =========================================================
   QIE — corporate site stylesheet
   Palette derives from the brand: deep navy + signal orange
   ========================================================= */

:root{
  --navy-900:#05132A;
  --navy-800:#081E3E;
  --navy-700:#0E2A5C;
  --navy-600:#153A78;
  --orange:#F0761F;
  --orange-dark:#D25F0C;
  --orange-soft:#FFF1E6;
  --ink:#0F1B2D;
  --body:#4A566C;
  --muted:#7A8699;
  --line:#E3E8F0;
  --line-strong:#CBD4E1;
  --bg:#FFFFFF;
  --bg-soft:#F6F8FB;
  --bg-tint:#EDF1F7;

  --font-sans:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-display:"Barlow Condensed","Inter","Segoe UI",sans-serif;

  --container:1240px;
  --gutter:28px;
  --radius:4px;
  --shadow-sm:0 1px 2px rgba(15,27,45,.06);
  --shadow-md:0 12px 32px -18px rgba(15,27,45,.35);
  --shadow-lg:0 40px 80px -50px rgba(15,27,45,.55);
  --ease:cubic-bezier(.2,.7,.3,1);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--body);
  font-family:var(--font-sans);font-size:16px;line-height:1.65;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer}
ul{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;letter-spacing:-.02em;line-height:1.12}
p{margin:0}
::selection{background:var(--orange);color:#fff}

/* ---------- layout helpers ---------- */
.container{width:100%;max-width:var(--container);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-block:104px}
.section--tight{padding-block:76px}
.section--soft{background:var(--bg-soft)}
.section--navy{background:var(--navy-800);color:#B9C6DA}
.section--navy h1,.section--navy h2,.section--navy h3,.section--navy h4{color:#fff}
.section--line{border-top:1px solid var(--line)}

.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-display);font-size:13px;font-weight:600;
  letter-spacing:.22em;text-transform:uppercase;color:var(--navy-600);
}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--orange)}
.section--navy .eyebrow{color:#8FB0DE}
.section__head{display:flex;align-items:flex-end;justify-content:space-between;gap:40px;margin-bottom:56px}
.section__head h2{font-size:clamp(30px,3.4vw,46px);margin-top:16px;max-width:22ch;text-wrap:balance}
.section__head p{max-width:44ch;font-size:17px;text-wrap:pretty}
.section__head--center{flex-direction:column;align-items:center;text-align:center}
.section__head--center h2{max-width:26ch}
.section__head--center p{max-width:56ch}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:15px 26px;border-radius:2px;border:1px solid transparent;
  font-size:14px;font-weight:600;letter-spacing:.02em;
  transition:background .25s var(--ease),color .25s var(--ease),border-color .25s var(--ease),transform .25s var(--ease);
}
.btn svg{width:16px;height:16px;flex:none;transition:transform .25s var(--ease)}
.btn:hover svg{transform:translateX(3px)}
.btn--primary{background:var(--orange);color:#fff}
.btn--primary:hover{background:var(--orange-dark)}
.btn--navy{background:var(--navy-700);color:#fff}
.btn--navy:hover{background:var(--navy-600)}
.btn--ghost{border-color:var(--line-strong);color:var(--ink);background:transparent}
.btn--ghost:hover{border-color:var(--navy-700);color:var(--navy-700)}
.section--navy .btn--ghost{border-color:rgba(255,255,255,.28);color:#fff}
.section--navy .btn--ghost:hover{border-color:#fff;background:rgba(255,255,255,.06)}
.link-arrow{
  display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;
  color:var(--navy-700);padding-bottom:3px;border-bottom:1px solid var(--line-strong);
  transition:color .2s,border-color .2s;
}
.link-arrow:hover{color:var(--orange);border-color:var(--orange)}

/* ---------- topbar ---------- */
.topbar{background:var(--navy-900);color:#9DB0CB;font-size:12.5px;letter-spacing:.02em}
.topbar__inner{display:flex;align-items:center;justify-content:space-between;min-height:38px;gap:20px}
.topbar__note{display:inline-flex;align-items:center;gap:8px}
.topbar__dot{width:5px;height:5px;border-radius:50%;background:#48C08A;box-shadow:0 0 0 3px rgba(72,192,138,.18)}
.topbar__links{display:flex;align-items:center;gap:22px}
.topbar__links a{display:inline-flex;align-items:center;gap:7px;transition:color .2s;white-space:nowrap}
.topbar__links a:hover{color:#fff}
.topbar svg{width:13px;height:13px;opacity:.7}

/* ---------- header ---------- */
.header{
  position:sticky;top:0;z-index:60;background:rgba(255,255,255,.94);
  backdrop-filter:saturate(160%) blur(10px);border-bottom:1px solid var(--line);
  transition:box-shadow .3s var(--ease);
}
.header.is-stuck{box-shadow:0 10px 30px -22px rgba(15,27,45,.5)}
.header__inner{display:flex;align-items:center;justify-content:space-between;gap:32px;min-height:78px}

.logo{display:inline-flex;align-items:center;gap:11px}
.logo__mark{width:38px;height:38px;flex:none}
.logo__text{font-family:var(--font-sans);font-size:25px;font-weight:800;letter-spacing:.015em;color:var(--navy-800)}
.logo__text em{font-style:normal;color:var(--orange)}
.logo__sub{display:block;font-family:var(--font-display);font-size:10px;font-weight:600;
  letter-spacing:.26em;text-transform:uppercase;color:var(--muted);margin-top:-3px}

.nav{display:flex;align-items:center;gap:4px}
.nav a{
  position:relative;padding:10px 14px;font-size:14px;font-weight:500;color:var(--ink);
  transition:color .2s;
}
.nav a::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;
  background:var(--orange);transform:scaleX(0);transform-origin:left;
  transition:transform .28s var(--ease);
}
.nav a:hover::after,.nav a.is-active::after{transform:scaleX(1)}
.nav a.is-active{color:var(--navy-700)}
.header__cta{display:flex;align-items:center;gap:12px}
.header__phone{display:inline-flex;align-items:center;gap:9px;font-size:13px;font-weight:600;color:var(--navy-800)}
.header__phone svg{width:16px;height:16px;color:var(--orange)}
.burger{display:none;width:44px;height:44px;border:1px solid var(--line);background:#fff;border-radius:2px;align-items:center;justify-content:center}
.burger span{display:block;width:18px;height:1.6px;background:var(--ink);position:relative}
.burger span::before,.burger span::after{content:"";position:absolute;left:0;width:18px;height:1.6px;background:var(--ink)}
.burger span::before{top:-6px}.burger span::after{top:6px}

/* ---------- hero ---------- */
.hero{position:relative;background:var(--bg-soft);overflow:hidden}
.hero__grid{
  position:absolute;inset:0;
  background-image:linear-gradient(to right,rgba(14,42,92,.055) 1px,transparent 1px),
                   linear-gradient(to bottom,rgba(14,42,92,.055) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(ellipse at 30% 20%,#000 20%,transparent 78%);
  -webkit-mask-image:radial-gradient(ellipse at 30% 20%,#000 20%,transparent 78%);
}
.hero__inner{position:relative;display:grid;grid-template-columns:1.12fr .88fr;gap:52px;align-items:center;padding-block:64px 88px}
.hero h1{font-size:clamp(34px,3.7vw,54px);letter-spacing:-.035em}
.hero h1 .mark{position:relative;white-space:nowrap}
.hero h1 .mark::after{
  content:"";position:absolute;left:0;right:0;bottom:.06em;height:.32em;
  background:var(--orange);opacity:.18;z-index:-1;border-radius:2px;
}
.hero__lead{margin-top:24px;font-size:17.5px;line-height:1.72;max-width:52ch;color:var(--body)}
.hero__actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:34px}
.hero__points{margin-top:36px;display:grid;gap:11px}
.hero__points li{display:flex;gap:11px;font-size:14.5px;color:var(--ink);align-items:flex-start}
.hero__points svg{width:17px;height:17px;flex:none;margin-top:2px;color:var(--orange)}

.hero__media{position:relative}
.hero__card{
  position:relative;background:#fff;border:1px solid var(--line);
  box-shadow:var(--shadow-lg);padding:14px;border-radius:var(--radius);
}
.hero__card img{width:100%;height:auto}
.hero__plate{position:relative;padding:6px 4px 2px;background:radial-gradient(circle at 50% 42%,#fff 40%,var(--bg-tint) 100%)}
.hero__strip{display:grid;grid-template-columns:repeat(3,1fr);margin-top:12px;padding-top:14px;border-top:1px solid var(--line)}
.hero__strip div{padding-left:16px;border-left:1px solid var(--line)}
.hero__strip div:first-child{border-left:0;padding-left:2px}
.hero__strip span{display:block;font-size:10px;letter-spacing:.16em;text-transform:uppercase;color:var(--muted)}
.hero__strip strong{display:block;margin-top:5px;font-size:14.5px;font-weight:600;color:var(--ink);letter-spacing:-.01em}
.hero__card::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:3px;
  background:linear-gradient(90deg,var(--orange) 0 32%,var(--navy-700) 32% 100%);
}
.chip{
  position:absolute;display:inline-flex;align-items:center;gap:8px;
  background:var(--navy-800);color:#fff;font-size:11.5px;font-weight:600;
  letter-spacing:.1em;text-transform:uppercase;padding:9px 13px;border-radius:2px;
  box-shadow:var(--shadow-md);
}
.chip--tl{top:16px;left:-14px}
.chip--br{bottom:22px;right:-14px;background:#fff;color:var(--navy-800);border:1px solid var(--line)}
.chip svg{width:13px;height:13px;color:var(--orange)}
.chip--br svg{color:var(--orange)}

/* stat bar */
.statbar{position:relative;background:var(--navy-800);color:#fff}
.statbar__inner{display:grid;grid-template-columns:repeat(4,1fr)}
.stat{padding:30px 26px;border-left:1px solid rgba(255,255,255,.11)}
.stat:first-child{border-left:0;padding-left:0}
.stat__num{font-family:var(--font-display);font-size:44px;font-weight:600;line-height:1;letter-spacing:-.01em;color:#fff}
.stat__num span{color:var(--orange)}
.stat__label{margin-top:9px;font-size:12.5px;letter-spacing:.14em;text-transform:uppercase;color:#93A9C7}

/* ---------- category cards ---------- */
.cat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.cat-card{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;display:flex;flex-direction:column;
  transition:border-color .3s var(--ease),transform .3s var(--ease),box-shadow .3s var(--ease);
}
.cat-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--shadow-md)}
.cat-card__media{
  aspect-ratio:4/3;display:grid;place-items:center;padding:22px;overflow:hidden;
  background:radial-gradient(circle at 50% 45%,#fff 0%,var(--bg-tint) 100%);
}
.cat-card__media img{width:100%;height:100%;object-fit:contain;transition:transform .45s var(--ease)}
.cat-card:hover .cat-card__media img{transform:scale(1.04)}
.cat-card__body{padding:22px 22px 24px;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:8px;flex:1}
.cat-card__body h3{font-size:17.5px;letter-spacing:-.01em}
.cat-card__body p{font-size:13px;color:var(--muted);letter-spacing:.03em}
.cat-card__more{margin-top:auto;padding-top:14px;font-size:12.5px;font-weight:600;color:var(--navy-700);
  display:inline-flex;align-items:center;gap:7px}
.cat-card__more svg{width:14px;height:14px;transition:transform .25s var(--ease);color:var(--orange)}
.cat-card:hover .cat-card__more svg{transform:translateX(4px)}

/* ---------- feature list (why us) ---------- */
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.feat{background:#fff;padding:40px 34px 44px}
.feat__idx{font-family:var(--font-display);font-size:13px;font-weight:600;letter-spacing:.2em;color:var(--orange)}
.feat h3{font-size:21px;margin-top:20px;letter-spacing:-.015em}
.feat p{margin-top:14px;font-size:14.5px;line-height:1.7}
.feat__list{margin-top:18px;display:grid;gap:8px}
.feat__list li{position:relative;padding-left:16px;font-size:13.5px;color:var(--body)}
.feat__list li::before{content:"";position:absolute;left:0;top:.62em;width:6px;height:1.5px;background:var(--orange)}

/* ---------- featured product ---------- */
.feature{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.feature__media{position:relative;background:#fff;border:1px solid rgba(255,255,255,.14);border-radius:var(--radius);padding:34px}
.feature__media::before{
  content:"";position:absolute;inset:0;border-radius:var(--radius);
  background:radial-gradient(circle at 50% 40%,rgba(255,255,255,.16),transparent 70%);pointer-events:none;
}
.feature__media img{position:relative;width:100%;height:auto}
.feature__title{font-size:clamp(28px,3vw,40px);margin-top:16px}
.feature__desc{margin-top:20px;font-size:16px;max-width:48ch;color:#B9C6DA}
.specs{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.14);margin-top:34px}
.specs div{background:var(--navy-800);padding:18px 20px}
.specs dt{font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:#8FA9CD}
.specs dd{margin:7px 0 0;font-size:15.5px;font-weight:600;color:#fff;letter-spacing:-.01em}
.feature__foot{margin-top:32px;display:flex;gap:12px;flex-wrap:wrap}

/* ---------- mosaic / factory ---------- */
.mosaic{display:grid;grid-template-columns:repeat(4,1fr);grid-auto-rows:190px;gap:14px}
.mosaic figure{position:relative;margin:0;overflow:hidden;border-radius:2px;background:var(--bg-tint)}
.mosaic img{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease)}
.mosaic figure:hover img{transform:scale(1.05)}
.mosaic figcaption{
  position:absolute;left:0;right:0;bottom:0;padding:26px 16px 13px;
  font-size:12px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:#fff;
  background:linear-gradient(to top,rgba(5,19,42,.82),rgba(5,19,42,0));
}
.mosaic .span-2{grid-column:span 2}
.mosaic .tall{grid-row:span 2}

.split{display:grid;grid-template-columns:1fr 1fr;gap:72px;align-items:center}
.workshop{display:grid;gap:0;border-top:1px solid var(--line)}
.workshop li{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:18px 2px;border-bottom:1px solid var(--line);
}
.workshop__name{display:flex;align-items:center;gap:16px;font-size:15.5px;font-weight:600;color:var(--ink)}
.workshop__name span{font-family:var(--font-display);font-size:12px;letter-spacing:.16em;color:var(--muted)}
.workshop__tag{font-size:12px;letter-spacing:.09em;text-transform:uppercase;color:var(--navy-600);
  background:var(--bg-tint);padding:5px 10px;border-radius:2px}

/* ---------- values ---------- */
.value-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;align-items:start}
.value{position:relative;background:#fff;border:1px solid var(--line);border-top:3px solid var(--navy-700);padding:34px 30px 36px;border-radius:2px}
.value:nth-child(2){border-top-color:var(--orange)}
.value h3{font-size:14px;letter-spacing:.16em;text-transform:uppercase;color:var(--navy-700)}
.value p{margin-top:16px;font-size:15px;line-height:1.75}
.value ul{margin-top:16px;display:grid;gap:9px}
.value ul li{position:relative;padding-left:16px;font-size:14px}
.value ul li::before{content:"";position:absolute;left:0;top:.65em;width:6px;height:1.5px;background:var(--orange)}

/* ---------- CTA band ---------- */
.cta{position:relative;background:var(--navy-900);color:#fff;overflow:hidden}
.cta::before{
  content:"";position:absolute;right:-8%;top:-60%;width:70%;height:220%;
  background:radial-gradient(circle,rgba(240,118,31,.16),transparent 62%);
}
.cta__inner{position:relative;display:flex;align-items:center;justify-content:space-between;gap:48px;padding-block:70px}
.cta h2{font-size:clamp(28px,3.2vw,42px);max-width:24ch;text-wrap:balance;color:#fff}
.cta .btn--ghost{border-color:rgba(255,255,255,.3);color:#fff}
.cta .btn--ghost:hover{border-color:#fff;color:#fff;background:rgba(255,255,255,.08)}
.cta p{margin-top:14px;color:#A7B8D1;max-width:52ch}
.cta__actions{display:flex;gap:12px;flex-wrap:wrap;flex:none}

/* ---------- page hero (inner pages) ---------- */
.pagehead{position:relative;background:var(--navy-800);color:#AEBDD4;padding-block:78px 84px;overflow:hidden}
.pagehead__grid{
  position:absolute;inset:0;
  background-image:linear-gradient(to right,rgba(255,255,255,.06) 1px,transparent 1px);
  background-size:72px 100%;
  mask-image:linear-gradient(to right,#000,transparent 70%);
  -webkit-mask-image:linear-gradient(to right,#000,transparent 70%);
}
.pagehead__inner{position:relative;max-width:760px}
.pagehead h1{color:#fff;font-size:clamp(34px,4.4vw,56px);margin-top:18px;text-wrap:balance}
.pagehead p{margin-top:20px;font-size:17px;max-width:62ch}
.crumbs{display:flex;align-items:center;gap:10px;font-size:12.5px;letter-spacing:.06em;color:#8099BE}
.crumbs a:hover{color:#fff}
.crumbs svg{width:12px;height:12px;opacity:.6}

/* ---------- filter bar ---------- */
.filters{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:44px}
.filter{
  padding:10px 18px;border:1px solid var(--line-strong);background:#fff;border-radius:2px;
  font-size:13.5px;font-weight:500;color:var(--ink);
  transition:background .2s,border-color .2s,color .2s;
}
.filter:hover{border-color:var(--navy-700);color:var(--navy-700)}
.filter.is-on{background:var(--navy-800);border-color:var(--navy-800);color:#fff}

/* ---------- product cards ---------- */
.prod-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.prod{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  display:flex;flex-direction:column;
  transition:box-shadow .3s var(--ease),transform .3s var(--ease),border-color .3s var(--ease);
}
.prod:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:var(--line-strong)}
.prod__media{position:relative;aspect-ratio:16/10;background:radial-gradient(circle at 50% 45%,#fff,var(--bg-tint));display:grid;place-items:center;padding:20px}
.prod__media img{width:100%;height:100%;object-fit:contain}
.prod__tag{
  position:absolute;top:12px;left:12px;font-family:var(--font-display);font-size:11px;
  letter-spacing:.16em;text-transform:uppercase;color:var(--navy-700);
  background:#fff;border:1px solid var(--line);padding:5px 9px;border-radius:2px;
}
.prod__tag--hot{background:var(--orange-soft);border-color:#F7D3B4;color:var(--orange-dark)}
.prod__body{padding:20px 22px 24px;border-top:1px solid var(--line);flex:1;display:flex;flex-direction:column}
.prod__body h3{font-size:19px;letter-spacing:-.015em}
.prod__sub{margin-top:6px;font-size:12.5px;letter-spacing:.05em;color:var(--muted);text-transform:uppercase}
.prod__meta{margin-top:16px;display:flex;flex-wrap:wrap;gap:6px}
.prod__meta span{font-size:11.5px;color:var(--body);background:var(--bg-soft);border:1px solid var(--line);padding:4px 8px;border-radius:2px}
.prod__link{margin-top:auto;padding-top:18px;font-size:13px;font-weight:600;color:var(--navy-700);display:inline-flex;align-items:center;gap:7px}
.prod__link svg{width:13px;height:13px;color:var(--orange);transition:transform .25s var(--ease)}
.prod:hover .prod__link svg{transform:translateX(3px)}
.is-hidden{display:none!important}

/* ---------- spec table ---------- */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:2px;background:#fff;-webkit-overflow-scrolling:touch}
table.spec{width:100%;border-collapse:collapse;font-size:14px;min-width:760px}
table.spec th,table.spec td{padding:14px 18px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
table.spec thead th{
  background:var(--navy-800);color:#fff;font-size:11.5px;font-weight:600;
  letter-spacing:.13em;text-transform:uppercase;white-space:nowrap;border-bottom:0;
}
table.spec tbody th{font-weight:600;color:var(--ink);background:var(--bg-soft);width:210px;white-space:nowrap}
table.spec tbody tr:last-child th,table.spec tbody tr:last-child td{border-bottom:0}
table.spec td{color:var(--body)}
table.spec tbody tr:hover td{background:#FBFCFE}

/* ---------- process steps ---------- */
.steps{display:grid;grid-template-columns:repeat(6,1fr);gap:1px;background:rgba(255,255,255,.13);border:1px solid rgba(255,255,255,.13)}
.step{background:var(--navy-800);padding:26px 20px 30px;position:relative}
.step__n{font-family:var(--font-display);font-size:12px;letter-spacing:.18em;color:var(--orange)}
.step h4{margin-top:14px;font-size:15px;color:#fff}
.step p{margin-top:8px;font-size:12.5px;color:#93A9C7;line-height:1.6}

/* ---------- contact ---------- */
.contact-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:64px;align-items:start}
.info-list{display:grid;gap:1px;background:var(--line);border:1px solid var(--line)}
.info{background:#fff;padding:24px 26px;display:flex;gap:18px}
.info svg{width:19px;height:19px;color:var(--orange);flex:none;margin-top:3px}
.info h4{font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--muted);font-weight:600}
.info p{margin-top:7px;font-size:15.5px;color:var(--ink);font-weight:500;line-height:1.6}
.info a{transition:color .2s}
.info a:hover{color:var(--orange-dark)}

/* 即时通讯：三个平台同一号码 */
.im-links{display:flex;flex-wrap:wrap;gap:7px;margin-top:11px}
.im-links a{display:inline-flex;align-items:center;border:1px solid var(--line);background:var(--bg-soft);
  padding:5px 11px;font-size:12px;font-weight:600;letter-spacing:.05em;color:var(--ink);border-radius:2px}
.im-links a:hover{border-color:var(--orange);color:var(--orange-dark);background:#fff}
.im-num{margin-top:9px !important;font-size:13px !important;color:var(--muted) !important;
  letter-spacing:.04em;font-variant-numeric:tabular-nums}

.form{background:#fff;border:1px solid var(--line);padding:34px;border-radius:var(--radius);box-shadow:var(--shadow-sm)}
.form h3{font-size:21px}
.form p.form__note{margin-top:8px;font-size:13.5px;color:var(--muted)}
.field{margin-top:18px;display:grid;gap:7px}
.field label{font-size:12px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.field input,.field select,.field textarea{
  width:100%;padding:12px 14px;border:1px solid var(--line-strong);border-radius:2px;
  font:inherit;font-size:14.5px;color:var(--ink);background:#fff;
  transition:border-color .2s,box-shadow .2s;
}
.field textarea{min-height:112px;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--navy-600);box-shadow:0 0 0 3px rgba(21,58,120,.1);
}
.form__row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.form .btn{width:100%;justify-content:center;margin-top:22px}
.form__status{margin-top:14px;font-size:13.5px;color:#1F7A4D;display:none}
.form__status.is-on{display:block}

/* ---------- footer ---------- */
.footer{background:var(--navy-900);color:#8FA1BC;font-size:14px}
.footer__top{display:grid;grid-template-columns:1.5fr .8fr .8fr 1.1fr;gap:48px;padding-block:66px 56px}
.footer .logo__text{color:#fff}
.footer .logo__sub{color:#6C82A3}
.footer__blurb{margin-top:20px;max-width:34ch;line-height:1.75;font-size:13.5px}
.footer h5{margin:0 0 16px;font-size:11.5px;letter-spacing:.18em;text-transform:uppercase;color:#fff;font-weight:600}
.footer li{margin-bottom:10px}
.footer li a{transition:color .2s}
.footer li a:hover{color:#fff}
.footer__contact li{display:flex;gap:10px;align-items:flex-start;line-height:1.6}
.footer__contact svg{width:15px;height:15px;color:var(--orange);flex:none;margin-top:3px}
.footer__im-links{display:flex;flex-wrap:wrap;align-items:center;gap:6px}
.footer__im-links span{color:#4E6284}
.footer__im-links a{color:#B9C7DC}
.footer__im-links a:hover{color:var(--orange)}
.footer__bottom{border-top:1px solid rgba(255,255,255,.1);padding-block:22px;display:flex;
  align-items:center;justify-content:space-between;gap:20px;font-size:12.5px;color:#6C82A3}
.footer__bottom a:hover{color:#fff}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}

/* ---------- responsive ---------- */
@media (max-width:1080px){
  .container{--gutter:24px}
  .section{padding-block:84px}
  .hero__inner{grid-template-columns:1fr;gap:48px;padding-block:56px 72px}
  .hero__media{max-width:620px}
  .cat-grid{grid-template-columns:repeat(2,1fr)}
  .feat-grid{grid-template-columns:1fr}
  .feature{grid-template-columns:1fr;gap:44px}
  .split{grid-template-columns:1fr;gap:44px}
  .prod-grid{grid-template-columns:repeat(2,1fr)}
  .value-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:repeat(3,1fr)}
  .contact-grid{grid-template-columns:1fr;gap:44px}
  .footer__top{grid-template-columns:1fr 1fr;gap:36px}
  .cta__inner{flex-direction:column;align-items:flex-start;gap:32px}
  .mosaic{grid-auto-rows:160px}
  .header__phone{display:none}
  .topbar__note{display:none}
  .topbar__inner{justify-content:center}
}
@media (max-width:860px){
  .nav{
    position:fixed;inset:78px 0 auto;background:#fff;flex-direction:column;align-items:stretch;
    gap:0;padding:12px 24px 24px;border-bottom:1px solid var(--line);
    box-shadow:0 24px 40px -30px rgba(15,27,45,.6);
    transform:translateY(-8px);opacity:0;pointer-events:none;transition:opacity .25s,transform .25s;
  }
  .nav.is-open{transform:none;opacity:1;pointer-events:auto}
  .nav a{padding:14px 4px;border-bottom:1px solid var(--line);font-size:15px}
  .nav a::after{display:none}
  .burger{display:inline-flex}
  .header__cta .btn{display:none}
  .statbar__inner{grid-template-columns:1fr 1fr}
  .stat{padding:24px;border-left:0;border-top:1px solid rgba(255,255,255,.11)}
  .stat:first-child{border-top:0;padding-left:24px}
  .stat:nth-child(2){border-top:0}
  .section__head{flex-direction:column;align-items:flex-start;gap:20px;margin-bottom:40px}
  .specs{grid-template-columns:1fr}
  .pagehead{padding-block:56px 60px}
}
@media (max-width:620px){
  .section{padding-block:64px}
  .cat-grid{grid-template-columns:1fr}
  .prod-grid{grid-template-columns:1fr}
  .mosaic{grid-template-columns:1fr 1fr;grid-auto-rows:130px}
  .mosaic .span-2{grid-column:span 1}
  .mosaic .tall{grid-row:span 1}
  .steps{grid-template-columns:1fr 1fr}
  .footer__top{grid-template-columns:1fr;gap:32px;padding-block:48px 40px}
  .footer__bottom{flex-direction:column;align-items:flex-start;gap:10px}
  .form{padding:24px}
  .form__row{grid-template-columns:1fr}
  .chip--tl{left:-6px}
  .chip--br{right:-6px}
  .workshop li{flex-direction:column;align-items:flex-start;gap:8px}
}

@media (max-width:520px){
  .topbar__links{gap:16px;font-size:11.5px}
  .topbar__links a:first-child{display:none}
  .statbar__inner{grid-template-columns:1fr 1fr}
  .stat__num{font-size:34px}
  .stats--compact .stat{padding:18px 16px}
}

/* =========================================================
   FACTORY FILM
   ========================================================= */
.film__stage{
  position:relative;display:block;width:100%;padding:0;border:0;
  background:var(--navy-900);border-radius:var(--radius);overflow:hidden;
  cursor:pointer;isolation:isolate;box-shadow:var(--shadow-lg);
}
.film__stage img{
  width:100%;aspect-ratio:16/9;object-fit:cover;
  transition:transform .8s var(--ease),filter .5s var(--ease);
  filter:saturate(1.02);
}
.film__stage::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(to top,rgba(4,16,36,.94) 0%,rgba(4,16,36,.55) 32%,rgba(4,16,36,.06) 68%,rgba(4,16,36,.12) 100%);
}
.film__stage:hover img{transform:scale(1.025)}
.film__stage:focus-visible{outline:3px solid var(--orange);outline-offset:3px}

.film__play{
  position:absolute;inset:0;display:grid;place-items:center;z-index:2;
}
.film__play span{
  display:inline-flex;align-items:center;justify-content:center;
  width:88px;height:88px;border-radius:50%;
  border:1px solid rgba(255,255,255,.7);background:rgba(255,255,255,.94);
  box-shadow:0 18px 44px -16px rgba(2,10,26,.65);
  color:var(--navy-900);transition:transform .35s var(--ease),background .35s var(--ease),border-color .35s var(--ease),color .35s var(--ease);
}
.film__play svg{width:26px;height:26px;margin-left:3px}
.film__stage:hover .film__play span{transform:scale(1.08);background:var(--orange);border-color:var(--orange);color:#fff}

.film__meta{
  position:absolute;left:0;right:0;bottom:0;z-index:2;
  display:flex;align-items:flex-end;justify-content:space-between;gap:20px;
  padding:34px 38px;text-align:left;pointer-events:none;
  text-shadow:0 1px 14px rgba(2,10,26,.7);
}
.film__kicker{
  display:inline-flex;align-items:center;gap:9px;
  font-family:var(--font-display);font-size:13px;letter-spacing:.2em;
  text-transform:uppercase;color:#FF8F45;margin-bottom:10px;
}
.film__kicker::before{content:"";width:26px;height:2px;background:var(--orange);display:block}
.film__title{
  display:block;color:#fff;font-weight:700;letter-spacing:-.02em;line-height:1.15;
  font-size:clamp(20px,2.2vw,30px);max-width:20ch;
}
.film__sub{display:block;color:rgba(255,255,255,.66);font-size:14px;margin-top:8px}
.film__dur{
  display:inline-flex;align-items:center;gap:8px;flex:none;
  font-family:var(--font-display);font-size:13px;letter-spacing:.14em;
  color:#fff;padding:7px 13px;border:1px solid rgba(255,255,255,.28);border-radius:999px;
  background:rgba(4,16,36,.72);backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);
  text-shadow:none;
}

/* ---- lightbox ---- */
.film-modal{
  position:fixed;inset:0;z-index:200;display:none;
  align-items:center;justify-content:center;padding:32px;
}
.film-modal.is-open{display:flex}
.film-modal__backdrop{
  position:absolute;inset:0;background:rgba(3,12,28,.94);
  backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);
}
.film-modal__body{
  position:relative;width:100%;max-width:1080px;
  animation:filmIn .32s var(--ease);
}
@keyframes filmIn{from{opacity:0;transform:translateY(14px) scale(.985)}to{opacity:1;transform:none}}
.film-modal video{
  width:100%;display:block;border-radius:4px;background:#000;
  box-shadow:0 40px 100px -40px rgba(0,0,0,.9);
}
.film-modal__close{
  position:absolute;top:-46px;right:0;width:36px;height:36px;
  display:grid;place-items:center;border-radius:50%;
  border:1px solid rgba(255,255,255,.28);background:transparent;color:#fff;
  transition:background .25s,border-color .25s;
}
.film-modal__close:hover{background:rgba(255,255,255,.12);border-color:#fff}
.film-modal__close svg{width:16px;height:16px}
.film-modal__note{
  margin-top:14px;font-size:13px;color:rgba(255,255,255,.5);text-align:center;
}
body.film-open{overflow:hidden}

@media (max-width:860px){
  .film__play span{width:66px;height:66px}
  .film__play svg{width:20px;height:20px}
  .film__meta{padding:20px 20px 22px}
  .film__kicker{font-size:11px;margin-bottom:7px}
  .film__kicker::before{width:18px}
  .film__sub{display:none}
  .film__dur{display:none}
  .film-modal{padding:16px}
  .film-modal__close{top:-42px;right:0}
}

/* =========================================================
   LANGUAGE SWITCHER — 常驻可见语言条（纯链接，不依赖 JS/hover）
   ========================================================= */
.lang{
  display:inline-flex;align-items:center;gap:1px;
  padding:3px;border:1px solid rgba(255,255,255,.18);border-radius:999px;
  background:rgba(255,255,255,.07);
}
.lang a{
  display:block;padding:4px 9px;border-radius:999px;
  font-family:var(--font-display);font-size:11px;font-weight:600;letter-spacing:.09em;line-height:1.15;
  color:rgba(255,255,255,.72);text-decoration:none;
  transition:background .18s,color .18s;
}
.lang a:hover{background:rgba(255,255,255,.18);color:#fff}
.lang a.is-on{background:var(--orange);color:#fff}
.topbar .lang{margin-inline-start:18px;flex:0 0 auto}
@media (max-width:760px){
  .topbar .lang{margin-inline-start:10px}
  .lang a{padding:4px 7px;font-size:10.5px;letter-spacing:.06em}
}
@media (max-width:520px){
  .lang a{padding:4px 6px;font-size:10px}
}
/* 320~380px 的老机型：长邮箱 + 5 个语言键会顶出屏幕，整体缩一档 */
@media (max-width:380px){
  .topbar__links{gap:9px;font-size:10.5px}
  .topbar svg{width:11px;height:11px}
  .topbar .lang{margin-inline-start:6px;padding:2px}
  .lang a{padding:3px 4px;font-size:9px;letter-spacing:.02em}
  /* 表单控件的固有最小宽度会把整列撑爆，放开它 */
  .contact-grid > *{min-width:0}
  .field input,.field select,.field textarea{min-width:0}
  .info{padding:20px 18px;gap:14px}
  .form{padding:20px}
}

/* ---------- footer language row (no-JS fallback) ---------- */
.footer__lang{
  display:flex;align-items:center;gap:16px;flex-wrap:wrap;
  padding:22px 0 24px;margin-top:6px;
  border-top:1px solid rgba(255,255,255,.08);
}
.footer__lang-label{
  font-family:var(--font-display);font-size:11px;letter-spacing:.18em;
  text-transform:uppercase;color:rgba(255,255,255,.38);
}
.footer__lang-links{display:flex;flex-wrap:wrap;gap:8px}
.footer__lang-links a{
  font-size:12.5px;color:rgba(255,255,255,.68);
  padding:5px 12px;border:1px solid rgba(255,255,255,.14);border-radius:999px;
  transition:color .2s,border-color .2s,background .2s;
}
.footer__lang-links a:hover{color:#fff;border-color:rgba(255,255,255,.42)}
.footer__lang-links a.is-on{color:#fff;border-color:var(--orange);background:rgba(240,118,31,.16)}
@media (max-width:640px){
  .footer__lang{gap:10px;padding:18px 0 20px}
  .footer__lang-links a{font-size:11.5px;padding:4px 10px}
}

/* 浅底数据条（factory / about） */
.statbar__inner--light .stat{border-left:1px solid var(--line)}
.statbar__inner--light .stat:first-child{border-left:0;padding-left:0}
.statbar__inner--light .stat__num{letter-spacing:-.03em}
@media (max-width:860px){
  .statbar__inner--light{grid-template-columns:1fr 1fr}
  .statbar__inner--light .stat{border-left:0;border-top:1px solid var(--line);padding:22px 0 22px 18px}
  .statbar__inner--light .stat:nth-child(odd){padding-left:0}
  .statbar__inner--light .stat:nth-child(-n+2){border-top:0}
  .statbar__inner--light .stat__num{font-size:clamp(26px,7.2vw,34px);white-space:nowrap}
  .statbar__inner--light .stat__label{font-size:11px;line-height:1.45}
}

/* =========================================================
   INTERACTIVE 3D VIEWER（360° 展示 + 爆炸图）
   ========================================================= */
.p3d__bar{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;margin-bottom:14px}
.p3d__modes{display:inline-flex;background:#fff;border:1px solid var(--line);border-radius:999px;padding:4px;gap:4px}
.p3d__btn{
  padding:7px 18px;border-radius:999px;border:0;background:transparent;cursor:pointer;
  font-family:var(--font-body);font-size:13px;font-weight:600;line-height:1;letter-spacing:.02em;
  color:var(--ink);transition:background .2s,color .2s;
}
.p3d__btn:hover{background:var(--bg-soft)}
.p3d__btn.is-on{background:var(--navy-900);color:#fff}
.p3d__btn:disabled{opacity:.4;cursor:not-allowed}
.p3d__hint{font-size:12.5px;color:var(--muted)}

.p3d__stage{
  position:relative;height:560px;border-radius:10px;overflow:hidden;
  background:radial-gradient(120% 90% at 50% 18%, #16365c 0%, #0a1c33 58%, #061224 100%);
  touch-action:none;cursor:grab;
}
.p3d__stage::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.13;
  background-image:linear-gradient(rgba(255,255,255,.5) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.5) 1px,transparent 1px);
  background-size:44px 44px;
  mask-image:radial-gradient(80% 70% at 50% 40%, #000 30%, transparent 100%);
  -webkit-mask-image:radial-gradient(80% 70% at 50% 40%, #000 30%, transparent 100%);
}
.p3d__stage:active{cursor:grabbing}
.p3d__stage--fallback{background:#0a1c33 url("../img/p-qe01.jpg") center/contain no-repeat}
.p3d__canvas{position:absolute;inset:0}
.p3d__canvas canvas{width:100%!important;height:100%!important;display:block}
.p3d__labels{position:absolute;inset:0;pointer-events:none;overflow:hidden}
.p3d__lead{position:absolute;inset:0;width:100%;height:100%;overflow:visible;opacity:0;transition:opacity .3s}
.p3d-lead{fill:none;stroke:rgba(255,255,255,.40);stroke-width:1;stroke-linecap:round;stroke-linejoin:round;opacity:0;transition:opacity .3s}
.p3d-lead-dot{fill:#f0761f;stroke:rgba(255,255,255,.75);stroke-width:.8;opacity:0;transition:opacity .3s}
.p3d-label{
  position:absolute;left:0;top:0;display:flex;align-items:center;gap:7px;
  opacity:0;transition:opacity .3s;will-change:transform;
}
.p3d-label i{
  width:18px;height:18px;border-radius:50%;background:var(--orange);flex:none;
  display:flex;align-items:center;justify-content:center;
  font-size:10px;font-weight:800;font-style:normal;line-height:1;color:#0a1c33;
  box-shadow:0 0 0 3px rgba(240,118,31,.24);
}
.p3d-label span{
  font-size:12px;font-weight:600;line-height:1.2;color:#fff;white-space:nowrap;
  background:rgba(9,22,42,.88);border:1px solid rgba(255,255,255,.22);
  padding:4px 11px;border-radius:999px;
}
.p3d--narrow .p3d-label{gap:4px}
.p3d--narrow .p3d-label span{font-size:10px;padding:3px 8px;font-weight:600}
.p3d--narrow .p3d-label i{width:15px;height:15px;font-size:9px;box-shadow:0 0 0 2px rgba(240,118,31,.26)}
.p3d__loading{
  position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  color:rgba(255,255,255,.78);font-size:13px;transition:opacity .35s;
}
.p3d__spinner{
  width:24px;height:24px;margin-inline-end:10px;border-radius:50%;
  border:2px solid rgba(255,255,255,.22);border-top-color:var(--orange);
  animation:p3dSpin .9s linear infinite;
}
@keyframes p3dSpin{to{transform:rotate(360deg)}}

/* 产品卡上的 3D 徽标 */
.prod__3d{
  position:absolute;left:10px;bottom:10px;display:inline-flex;align-items:center;gap:6px;
  font-size:11.5px;font-weight:700;letter-spacing:.06em;color:#fff;text-decoration:none;
  background:rgba(240,118,31,.94);padding:5px 12px;border-radius:999px;
  transition:background .2s,transform .2s;
}
.prod__3d:hover{background:var(--orange);transform:translateY(-1px)}
.prod__3d svg{width:13px;height:13px}

@media (max-width:860px){
  .p3d__stage{height:430px}
  .p3d__hint{display:none}
  .p3d__bar{margin-bottom:12px}
}
@media (max-width:480px){
  .p3d__stage{height:340px}
  .p3d-label{gap:4px}
  .p3d-label span{font-size:10px;padding:2px 7px;font-weight:600}
  .p3d-label i{width:15px;height:15px;font-size:9px;box-shadow:0 0 0 2px rgba(240,118,31,.26)}
}

/* ---- 爆炸图展示 ---- */
#exploded{scroll-margin-top:86px}
.exploded-fig__link{display:block;cursor:zoom-in}
.p3d__next{margin:20px 0 0;text-align:center;font-size:14px}
.p3d__next a{display:inline-flex;align-items:center;gap:7px;padding:9px 18px;border:1px solid var(--line-strong);border-radius:999px;color:var(--navy-700);font-weight:600;background:#fff;transition:border-color .2s,box-shadow .2s}
.p3d__next a:hover{border-color:var(--orange);box-shadow:0 6px 18px rgba(8,30,62,.10)}
.exploded-fig{margin:36px auto 0;max-width:1120px}
.exploded-fig picture,.exploded-fig img{display:block;width:100%;height:auto;border-radius:10px;border:1px solid var(--line-strong);box-shadow:0 22px 55px rgba(8,30,62,.22);background:var(--navy-900)}
.exploded-fig figcaption{margin-top:12px;text-align:center;font-size:13px;color:var(--muted)}
@media (max-width:640px){.exploded-fig{margin-top:26px}}