/* Shanghai Chuban Limited — shchuban.biz
   Hand-written stylesheet. No framework, no build step. */

:root{
  --ink:#0d1522;
  --ink-2:#16233a;
  --slate:#42526b;
  --muted:#6b7c95;
  --line:#dfe4ec;
  --line-soft:#eef1f6;
  --paper:#ffffff;
  --paper-2:#f5f7fa;
  --brand:#c8451c;
  --brand-dark:#a33714;
  --brand-tint:#fdf0eb;
  --steel:#1f3b5c;
  --wrap:1180px;
  --r:4px;
  --font-display:"Archivo","Helvetica Neue",Helvetica,Arial,sans-serif;
  --font-body:"IBM Plex Sans",-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --font-mono:"IBM Plex Mono",ui-monospace,"SF Mono",Consolas,"Liberation Mono",monospace;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font:400 17px/1.65 var(--font-body);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:2px}
h1,h2,h3,h4{margin:0;font-family:var(--font-display);line-height:1.16;
  letter-spacing:-.02em;font-weight:700;text-wrap:balance}
h1{font-size:clamp(2rem,4.4vw,3.15rem)}
h2{font-size:clamp(1.55rem,2.9vw,2.25rem)}
h3{font-size:1.16rem;letter-spacing:-.01em}
p{margin:0 0 1em}
ul{margin:0;padding:0}

.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px}
/* grid children default to min-width:auto, which lets long strings push the page wide */
.hero-grid>*,.split>*,.inquiry-grid>*,.layout>*,.foot-grid>*,.cards>*,.flow>*{min-width:0}
.skip{position:absolute;left:-9999px;top:0;background:#fff;padding:12px 18px;z-index:200}
.skip:focus{left:12px;top:12px}

/* ---------- eyebrow / section heads ---------- */
.eyebrow{
  font-size:.72rem;font-weight:700;letter-spacing:.16em;text-transform:uppercase;
  color:var(--brand);margin:0 0 12px;
}
.sec-head{max-width:660px;margin-bottom:38px}
.sec-head p{color:var(--slate);font-size:1.05rem;margin:14px 0 0}

/* ---------- top bar ---------- */
.topbar{
  background:var(--ink);color:#9fb0c6;font-size:.82rem;
  border-bottom:1px solid rgba(255,255,255,.07);
}
.topbar .wrap{display:flex;flex-wrap:wrap;gap:8px 26px;align-items:center;padding-top:9px;padding-bottom:9px}
.topbar a{color:#dbe4ef}
.topbar .sep{margin-left:auto;color:#7b8ca3}

/* ---------- header ---------- */
.site-head{
  position:sticky;top:0;z-index:100;background:rgba(255,255,255,.96);
  backdrop-filter:saturate(160%) blur(8px);
  border-bottom:1px solid var(--line);
}
.site-head .wrap{display:flex;align-items:center;gap:20px;height:76px}
.brand{display:flex;align-items:center;gap:13px;color:var(--ink);flex:0 0 auto}
.brand:hover{text-decoration:none}
/* Mark: a wound roller tube seen end-on, with the fabric strip feeding in —
   the thermofusion winding process the company holds the patent for. */
.brand-mark{width:46px;height:37px;flex:0 0 46px;display:block;overflow:visible}
.brand-name{font-family:var(--font-display);font-weight:700;font-size:1.04rem;
  letter-spacing:.01em;line-height:1.12}
.brand-sub{display:block;font-weight:500;font-size:.71rem;letter-spacing:.11em;
  text-transform:uppercase;color:var(--muted);margin-top:3px}

.nav{margin-left:auto;display:flex;align-items:center;gap:4px}
.nav a{
  color:var(--ink-2);font-size:.94rem;font-weight:600;padding:9px 13px;border-radius:var(--r);
}
.nav a:hover{background:var(--paper-2);text-decoration:none;color:var(--brand)}
.nav a.on{color:var(--brand)}
.nav .btn{margin-left:10px}

.btn{
  display:inline-block;background:var(--brand);color:#fff;font-weight:700;font-size:.95rem;
  padding:12px 22px;border-radius:var(--r);border:1px solid var(--brand);
  cursor:pointer;text-align:center;line-height:1.3;
}
.btn:hover{background:var(--brand-dark);border-color:var(--brand-dark);color:#fff;text-decoration:none}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{background:var(--paper-2);color:var(--ink);border-color:#c8d0dc}
.btn-light{background:#fff;color:var(--ink);border-color:#fff}
.btn-light:hover{background:#eef1f6;color:var(--ink);border-color:#eef1f6}
.btn-outline-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.42)}
.btn-outline-light:hover{background:rgba(255,255,255,.1);color:#fff;border-color:#fff}

.burger{
  display:none;margin-left:auto;width:44px;height:44px;border:1px solid var(--line);
  background:#fff;border-radius:var(--r);cursor:pointer;padding:0;
}
.burger span,.burger span::before,.burger span::after{
  display:block;width:19px;height:2px;background:var(--ink);margin:0 auto;position:relative;
}
.burger span::before{content:"";position:absolute;top:-6px}
.burger span::after{content:"";position:absolute;top:6px}

/* ---------- hero ---------- */
.hero{
  background:var(--ink);color:#fff;position:relative;overflow:hidden;
  border-bottom:3px solid var(--brand);
}
.hero::before{
  content:"";position:absolute;inset:0;opacity:.5;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(ellipse 90% 70% at 72% 30%,#000,transparent 75%);
  -webkit-mask-image:radial-gradient(ellipse 90% 70% at 72% 30%,#000,transparent 75%);
}
.hero .wrap{position:relative;padding-top:84px;padding-bottom:84px}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero h1{color:#fff}
.hero h1 em{font-style:normal;color:#ff8a5f}
.hero .lede{font-size:1.14rem;line-height:1.62;color:#c3cfdd;margin:22px 0 30px;max-width:33em}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px}
.hero-eyebrow{color:#ff8a5f}

.hero-shot{border-radius:var(--r);overflow:hidden;border:1px solid rgba(255,255,255,.14);
  box-shadow:0 24px 60px rgba(0,0,0,.45);background:#0a1119}
.hero-shot img{width:100%;aspect-ratio:4/3;object-fit:cover}
.hero-shot figcaption{
  padding:13px 16px;font-size:.83rem;color:#a9b8c9;border-top:1px solid rgba(255,255,255,.1);
  display:flex;justify-content:space-between;gap:12px;align-items:center;
}
.hero-shot figcaption b{color:#fff;font-weight:600}

/* ---------- stat strip ---------- */
.stats{background:var(--ink-2);color:#fff}
.stats ul{
  display:grid;grid-template-columns:repeat(4,1fr);list-style:none;
  border-left:1px solid rgba(255,255,255,.1);
}
.stats li{padding:26px 26px;border-right:1px solid rgba(255,255,255,.1)}
.stats b{display:block;font-size:1.72rem;font-weight:800;letter-spacing:-.02em}
.stats span{display:block;font-size:.83rem;color:#a9b8c9;margin-top:4px;line-height:1.45}

/* ---------- sections ---------- */
section{padding:78px 0}
.sec-alt{background:var(--paper-2);border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft)}

/* ---------- process ---------- */
.flow{display:grid;grid-template-columns:repeat(5,1fr);gap:0;border:1px solid var(--line);background:#fff}
.flow li{list-style:none;padding:26px 22px;border-right:1px solid var(--line);position:relative}
.flow li:last-child{border-right:0}
.flow .n{
  width:30px;height:30px;border-radius:50%;background:var(--brand-tint);color:var(--brand);
  display:grid;place-items:center;font-weight:800;font-size:.85rem;margin-bottom:14px;
}
.flow h3{font-size:1rem;margin-bottom:7px}
.flow p{margin:0;font-size:.9rem;color:var(--slate);line-height:1.55}

/* ---------- machine cards ---------- */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;list-style:none}
.cards.two{grid-template-columns:repeat(2,1fr)}
.card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);
  border-radius:var(--r);overflow:hidden;transition:border-color .15s,box-shadow .15s,transform .15s;
}
.card:hover{border-color:#c2ccda;box-shadow:0 14px 34px rgba(13,21,34,.09);transform:translateY(-2px)}
.card-img{background:var(--paper-2);border-bottom:1px solid var(--line-soft);position:relative}
.card-img img{width:100%;aspect-ratio:4/3;object-fit:cover}
.card-img.empty{aspect-ratio:4/3;display:grid;place-items:center;color:#9fadc0;font-size:.85rem;letter-spacing:.08em;text-transform:uppercase}
.sku{
  position:absolute;left:0;top:0;background:var(--ink);color:#fff;font-size:.72rem;
  font-weight:700;letter-spacing:.09em;padding:6px 11px;
}
.card-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1}
.card-body h3 a{color:var(--ink)}
.card-body h3 a:hover{color:var(--brand);text-decoration:none}
.card-body p{color:var(--slate);font-size:.92rem;line-height:1.6;margin:10px 0 16px}
.card-meta{
  margin-top:auto;display:flex;flex-wrap:wrap;gap:6px 8px;
  font-size:.78rem;color:var(--muted);
}
.tag{background:var(--paper-2);border:1px solid var(--line-soft);border-radius:2px;padding:3px 8px}
.card-link{margin-top:16px;font-weight:700;font-size:.9rem}
.card-link::after{content:" →"}

/* ---------- split feature ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.split img{border:1px solid var(--line);border-radius:var(--r)}
.ticks{list-style:none}
.ticks li{position:relative;padding-left:30px;margin-bottom:13px;color:var(--slate);line-height:1.6}
.ticks li::before{
  content:"";position:absolute;left:4px;top:.55em;width:9px;height:9px;
  background:var(--brand);border-radius:1px;
}
.ticks strong{color:var(--ink)}

/* ---------- product page layout ---------- */
.crumbs{font-size:.85rem;color:var(--muted);padding:18px 0;border-bottom:1px solid var(--line-soft)}
.crumbs a{color:var(--slate)}
.crumbs span{margin:0 7px;color:#b9c3d0}

.layout{display:grid;grid-template-columns:250px 1fr;gap:48px;align-items:start;padding:52px 0 78px}
.side{position:sticky;top:100px;font-size:.92rem}
.side h4{
  font-size:.74rem;letter-spacing:.13em;text-transform:uppercase;color:var(--muted);
  padding-bottom:10px;border-bottom:1px solid var(--line);margin-bottom:12px;
}
.side h4+h4{margin-top:30px}
.side ul{list-style:none;margin-bottom:8px}
.side li a{display:block;padding:7px 10px;margin-left:-10px;border-radius:var(--r);color:var(--slate);line-height:1.4}
.side li a:hover{background:var(--paper-2);color:var(--brand);text-decoration:none}
.side li a.on{background:var(--brand-tint);color:var(--brand);font-weight:700}
.side .side-cta{margin-top:26px;padding:18px;background:var(--ink);border-radius:var(--r);color:#c3cfdd}
.side .side-cta p{font-size:.88rem;line-height:1.55;margin-bottom:14px;color:#c3cfdd}
.side .side-cta .btn{display:block;font-size:.9rem;padding:10px 14px}

.prod-head{margin-bottom:30px}
.prod-head .sku-line{
  display:inline-block;background:var(--ink);color:#fff;font-size:.75rem;font-weight:700;
  letter-spacing:.1em;padding:5px 11px;margin-bottom:16px;
}
.prod-head h1{font-size:clamp(1.7rem,3.2vw,2.4rem)}
.prod-head .lead{font-size:1.08rem;color:var(--slate);margin-top:16px;max-width:46em}

.prod-media{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin:8px 0 40px}
.prod-media img{border:1px solid var(--line);border-radius:var(--r);width:100%}
.embed{position:relative;padding-top:56.25%;background:var(--ink);border-radius:var(--r);overflow:hidden;border:1px solid var(--line)}
.embed iframe{position:absolute;inset:0;width:100%;height:100%;border:0}

table.spec{width:100%;border-collapse:collapse;font-size:.95rem;margin-bottom:12px}
table.spec th,table.spec td{text-align:left;padding:12px 16px;border-bottom:1px solid var(--line-soft);vertical-align:top}
table.spec th{width:40%;font-weight:600;color:var(--slate);background:var(--paper-2)}
table.spec tr:last-child th,table.spec tr:last-child td{border-bottom:0}
table.spec{border:1px solid var(--line);border-radius:var(--r);overflow:hidden}

.block{margin-bottom:42px}
.block h2{font-size:1.35rem;margin-bottom:18px;padding-bottom:12px;border-bottom:2px solid var(--ink)}

.note{background:var(--brand-tint);border-left:3px solid var(--brand);padding:16px 20px;
  color:#7d3417;font-size:.95rem;border-radius:0 var(--r) var(--r) 0}

/* ---------- inquiry ---------- */
.inquiry{background:var(--ink);color:#fff;padding:64px 0}
.inquiry-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start}
.inquiry h2{color:#fff}
.inquiry p{color:#c3cfdd}


.brief{list-style:none;margin-top:22px;display:grid;gap:11px}
.brief li{display:flex;gap:13px;color:#c3cfdd;font-size:.96rem;line-height:1.55}
.brief li span{
  flex:0 0 24px;height:24px;border-radius:50%;background:rgba(255,255,255,.09);
  color:#fff;display:grid;place-items:center;font-family:var(--font-mono);
  font-size:.76rem;font-weight:600;margin-top:2px;
}

/* Contact actions: the whole row is the target, so it works on a phone. */
.contact-card{display:grid;gap:2px;background:rgba(255,255,255,.1);border-radius:var(--r);overflow:hidden}
.ca{display:block;background:var(--ink);padding:19px 22px;color:#dbe4ef}
a.ca:hover{background:#1c2c46;text-decoration:none}
.ca-k{display:block;font-size:.73rem;letter-spacing:.13em;text-transform:uppercase;color:#8fa1b6}
.ca-v{display:block;font-family:var(--font-mono);font-size:1.02rem;color:#fff;
  margin-top:7px;overflow-wrap:anywhere;letter-spacing:-.01em}
a.ca .ca-v{text-decoration:underline;text-decoration-color:rgba(255,255,255,.28);
  text-underline-offset:4px}
a.ca:hover .ca-v{text-decoration-color:var(--brand)}
.ca-note{display:block;font-size:.83rem;color:#8fa1b6;margin-top:6px}
.ca-addr{display:block;font-size:.95rem;color:#c3cfdd;margin-top:7px;line-height:1.55}
.ca-static{background:#111d30}
.site-foot a,.site-foot li{overflow-wrap:anywhere}

/* ---------- CTA band ---------- */
.band{background:var(--brand);color:#fff;padding:56px 0}
.band .wrap{display:flex;flex-wrap:wrap;gap:26px;align-items:center;justify-content:space-between}
.band h2{color:#fff;max-width:20em}
.band p{color:#fbdccf;margin:10px 0 0;max-width:34em}

/* ---------- footer ---------- */
.site-foot{background:var(--ink);color:#8fa1b6;font-size:.9rem;padding:56px 0 0}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:38px;padding-bottom:44px}
.site-foot h4{color:#fff;font-size:.76rem;letter-spacing:.13em;text-transform:uppercase;margin-bottom:16px}
.site-foot ul{list-style:none}
.site-foot li{margin-bottom:9px;line-height:1.5}
.site-foot a{color:#b6c4d4}
.site-foot a:hover{color:#fff}
.site-foot .about{color:#93a4b9;line-height:1.65;max-width:32em}
.foot-bot{border-top:1px solid rgba(255,255,255,.1);padding:20px 0;display:flex;
  flex-wrap:wrap;gap:10px 24px;justify-content:space-between;font-size:.83rem;color:#7b8ca3}

/* ---------- samples ---------- */
.gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;list-style:none}
.gallery figure{margin:0;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;background:#fff}
.gallery img{width:100%;aspect-ratio:4/3;object-fit:cover}
.gallery figcaption{padding:15px 18px;font-size:.92rem;color:var(--slate)}
.gallery figcaption b{display:block;color:var(--ink);margin-bottom:3px}

/* ---------- news ---------- */
.news-list{list-style:none;border-top:1px solid var(--line)}
.news-list li{border-bottom:1px solid var(--line);padding:22px 0;display:flex;gap:26px;align-items:baseline}
.news-list time{flex:0 0 110px;color:var(--muted);font-size:.87rem;font-variant-numeric:tabular-nums}
.news-list h3{font-size:1.05rem}

.prose{max-width:44em}
.prose p{color:var(--slate);font-size:1.04rem;line-height:1.72}
.prose h2{margin:38px 0 16px}

/* ---------- responsive ---------- */
@media (max-width:1000px){
  .burger{display:block}
  .nav{
    position:absolute;left:0;right:0;top:100%;background:#fff;border-bottom:1px solid var(--line);
    flex-direction:column;align-items:stretch;gap:0;padding:10px 24px 20px;display:none;
    box-shadow:0 16px 30px rgba(13,21,34,.1);
  }
  .nav.open{display:flex}
  .nav a{padding:13px 0;border-bottom:1px solid var(--line-soft);border-radius:0}
  .nav a:hover{background:transparent}
  .nav .btn{margin:14px 0 0;border-radius:var(--r);padding:13px}

  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero .wrap{padding-top:62px;padding-bottom:62px}
  .cards,.cards.two{grid-template-columns:repeat(2,1fr)}
  .flow{grid-template-columns:repeat(2,1fr)}
  .flow li{border-bottom:1px solid var(--line)}
  .split,.inquiry-grid{grid-template-columns:1fr;gap:36px}
  .layout{grid-template-columns:1fr;gap:0}
  .side{position:static;order:2;margin-top:48px;padding-top:32px;border-top:1px solid var(--line)}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
  .gallery{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:760px){
  body{font-size:16px}
  .topbar .wrap{font-size:.78rem;gap:6px 16px}
  .topbar .sep{display:none}
  section{padding:56px 0}
  .stats ul{grid-template-columns:repeat(2,1fr);border-left:0}
  .stats li{padding:20px 22px;border-bottom:1px solid rgba(255,255,255,.1)}
  .stats b{font-size:1.45rem}
  .cards,.cards.two,.flow,.gallery{grid-template-columns:1fr}
  .flow li{border-right:0}
  .prod-media{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr;gap:28px}
  .news-list li{flex-direction:column;gap:6px}
  .ca{padding:16px 18px}
  .ca-v{font-size:.95rem}
  table.spec th{width:46%}
  table.spec th,table.spec td{padding:10px 12px;font-size:.9rem}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;scroll-behavior:auto!important}
}
@media print{
  .site-head,.topbar,.side,.inquiry,.band,.site-foot,.hero-cta{display:none}
  body{font-size:12pt}
}

/* ---------- typographic roles ----------
   Mono is reserved for the things a machine catalogue actually indexes on:
   model codes and measured values. Not decoration. */
.sku,.sku-line,.brand-mark{font-family:var(--font-mono);letter-spacing:.04em}
.stats b{font-family:var(--font-mono);font-weight:600;letter-spacing:-.02em;font-variant-numeric:tabular-nums}
table.spec td{font-family:var(--font-mono);font-size:.88rem;font-variant-numeric:tabular-nums;letter-spacing:-.005em}
.card-meta .tag{font-family:var(--font-mono);font-size:.75rem;font-variant-numeric:tabular-nums}
.news-list time{font-family:var(--font-mono)}
.eyebrow,.brand-sub,.side h4,.site-foot h4,.ca-k{font-family:var(--font-body)}
.btn{font-family:var(--font-display);letter-spacing:-.005em}
.flow .n{font-family:var(--font-mono)}