/* ============================================================
   Dongben Workholding — standalone product site
   No external dependencies, no web fonts, print-friendly tables.
   ============================================================ */

:root{
  --navy:#13293D;
  --navy-deep:#0B1A27;
  --steel:#2C4358;
  --orange:#D9531E;
  --orange-soft:#F4E2D9;
  --ink:#0E1620;
  --muted:#5B6775;
  --line:#DDE2E7;
  --line-strong:#C3CBD3;
  --bg:#F6F6F4;
  --paper:#FFFFFF;
  --ok:#1F6B4A;
  --max:1160px;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif;
  --mono:ui-monospace,"SF Mono",Menlo,Consolas,"Cascadia Mono","Roboto Mono",monospace;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);
  font-size:16px;line-height:1.68;-webkit-font-smoothing:antialiased;
}
img,svg{max-width:100%;display:block}
a{color:inherit}
h1,h2,h3,h4{margin:0;line-height:1.22;letter-spacing:-.012em;font-weight:650}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
ul,ol{margin:0 0 1em;padding-left:1.15em}
li{margin:.35em 0}
hr{border:0;border-top:1px solid var(--line);margin:0}

.wrap{max-width:var(--max);margin:0 auto;padding:0 30px}
.section{padding:72px 0}
.section--tight{padding:48px 0}
.section--paper{background:var(--paper);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section--navy{background:var(--navy);color:#E7EEF2}

.eyebrow{
  font-family:var(--mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--orange);margin:0 0 14px;font-weight:600;
}
.h-xl{font-size:clamp(30px,4.4vw,52px);letter-spacing:-.024em;line-height:1.1}
.h-l{font-size:clamp(24px,2.6vw,34px);letter-spacing:-.02em}
.h-m{font-size:19px;font-weight:650}
.lede{font-size:17.5px;color:var(--muted);max-width:62ch;line-height:1.72}
.small{font-size:13.5px;color:var(--muted)}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;background:rgba(255,255,255,.95);
  backdrop-filter:saturate(180%) blur(10px);border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:22px;height:68px}
.brand{display:flex;align-items:center;gap:11px;text-decoration:none;flex:none}
.brand-mark{width:28px;height:28px;flex:none;background:var(--navy);position:relative}
.brand-mark::after{content:"";position:absolute;inset:6px;border:1.5px solid var(--orange)}
.brand-text{display:flex;flex-direction:column;line-height:1.08}
.brand-name{font-size:14px;font-weight:750;letter-spacing:.15em}
.brand-sub{font-size:9px;letter-spacing:.19em;color:var(--muted);margin-top:3px}
.nav{display:flex;align-items:center;gap:24px;flex-wrap:wrap}
.nav a{
  text-decoration:none;font-size:13.5px;color:var(--muted);padding:5px 0;
  border-bottom:1.5px solid transparent;transition:.15s;
}
.nav a:hover,.nav a.is-active{color:var(--ink);border-bottom-color:var(--orange)}
.nav .lang{font-family:var(--mono);font-size:11.5px;letter-spacing:.08em;border-left:1px solid var(--line);padding-left:20px;color:var(--steel)}

/* ---------- hero ---------- */
.hero{
  background:
    linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px) 0 0/56px 56px,
    linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px) 0 0/56px 56px,
    linear-gradient(155deg,#152C42 0%,#0B1A27 100%);
  color:#F0F4F6;padding:78px 0 70px;position:relative;overflow:hidden;
}
.hero::after{
  content:"";position:absolute;right:-140px;top:-100px;width:520px;height:520px;
  border:1px solid rgba(255,255,255,.09);border-radius:50%;
}
.hero .eyebrow{color:#F0A483}
.hero h1{max-width:22ch}
.hero .lede{color:#B9C7D2;margin-top:20px;max-width:58ch}

.hero-facts{
  display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-top:44px;
  border-top:1px solid rgba(255,255,255,.16);
}
.hero-facts div{padding:18px 18px 0 0;border-right:1px solid rgba(255,255,255,.12)}
.hero-facts div:last-child{border-right:0}
.hero-facts strong{display:block;font-size:23px;font-weight:650;letter-spacing:-.01em}
.hero-facts span{font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:#93A6B4}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:9px;text-decoration:none;
  font-size:14px;font-weight:600;padding:13px 22px;border:1px solid transparent;
  transition:.16s;border-radius:2px;
}
.btn--primary{background:var(--orange);color:#fff}
.btn--primary:hover{background:#BE4517}
.btn--ghost{border-color:rgba(255,255,255,.32);color:#EAF1F5}
.btn--ghost:hover{border-color:#fff;background:rgba(255,255,255,.06)}
.btn--outline{border-color:var(--line-strong);color:var(--ink)}
.btn--outline:hover{border-color:var(--navy);background:#fff}
.btn-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}

/* ---------- product grid ---------- */
.grid{display:grid;gap:1px;background:var(--line);border:1px solid var(--line)}
.grid--3{grid-template-columns:repeat(3,1fr)}
.grid--2{grid-template-columns:repeat(2,1fr)}
.card{
  background:var(--paper);padding:26px 24px 24px;text-decoration:none;
  display:flex;flex-direction:column;transition:.16s;position:relative;
}
.card:hover{background:#FFFDFC;box-shadow:inset 0 -2px 0 var(--orange)}
.card .code{font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;color:var(--orange);margin-bottom:12px}
.card h3{font-size:16.5px;margin-bottom:9px;letter-spacing:-.01em}
.card p{font-size:13.5px;color:var(--muted);margin:0;line-height:1.6}
.card .card-meta{
  margin-top:16px;padding-top:13px;border-top:1px solid var(--line);
  font-family:var(--mono);font-size:11px;letter-spacing:.06em;color:var(--steel);
}

/* ---------- spec table ---------- */
.spec{width:100%;border-collapse:collapse;font-size:14px;margin:0 0 8px}
.spec caption{
  text-align:left;font-family:var(--mono);font-size:10.5px;letter-spacing:.15em;
  text-transform:uppercase;color:var(--muted);padding:0 0 10px;
}
.spec th,.spec td{padding:10px 14px;border-bottom:1px solid var(--line);vertical-align:top;text-align:left}
.spec th{width:38%;font-weight:600;color:var(--steel);background:#FBFBFA}
.spec tr:last-child th,.spec tr:last-child td{border-bottom:0}
.spec td{font-variant-numeric:tabular-nums}

/* ---------- price band ---------- */
.price-band{
  display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line-strong);
  border:1px solid var(--line-strong);margin:6px 0 0;
}
.price-band div{background:var(--paper);padding:20px}
.price-band strong{display:block;font-size:20px;letter-spacing:-.01em;font-variant-numeric:tabular-nums}
.price-band span{font-family:var(--mono);font-size:10px;letter-spacing:.13em;text-transform:uppercase;color:var(--muted);display:block;margin-bottom:6px}

/* ---------- layout split ---------- */
.split{display:grid;grid-template-columns:1.35fr .95fr;gap:56px;align-items:start}
.aside-box{border:1px solid var(--line-strong);background:var(--paper);padding:26px}
.aside-box h3{font-size:15px;margin-bottom:14px}
.aside-box ul{padding-left:1.1em;font-size:13.5px;color:var(--muted)}
.aside-box .btn{width:100%;justify-content:center;margin-top:18px}

/* ---------- steps ---------- */
.steps{counter-reset:s;display:grid;gap:0;border-top:1px solid var(--line-strong)}
.step{
  counter-increment:s;display:grid;grid-template-columns:56px 1fr;gap:20px;
  padding:20px 0;border-bottom:1px solid var(--line);
}
.step::before{
  content:counter(s,decimal-leading-zero);font-family:var(--mono);font-size:12px;
  color:var(--orange);padding-top:4px;letter-spacing:.08em;
}
.step h3{font-size:15.5px;margin-bottom:5px}
.step p{font-size:14px;color:var(--muted);margin:0}

/* ---------- faq ---------- */
.faq{border-top:1px solid var(--line-strong);max-width:88ch}
.faq details{border-bottom:1px solid var(--line);padding:0}
.faq summary{
  cursor:pointer;padding:17px 34px 17px 0;font-size:15.5px;font-weight:600;
  list-style:none;position:relative;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"+";position:absolute;right:4px;top:15px;font-family:var(--mono);
  font-size:17px;color:var(--orange);font-weight:400;
}
.faq details[open] summary::after{content:"–"}
.faq .faq-body{padding:0 0 18px;font-size:14.5px;color:var(--muted);max-width:78ch}

/* ---------- figures / photos ---------- */
.photo{position:relative;border:1px solid var(--line-strong);background:#EBEBE8;overflow:hidden}
.photo img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3}
.photo figcaption{
  font-family:var(--mono);font-size:10.5px;letter-spacing:.08em;color:var(--muted);
  padding:9px 12px;background:var(--paper);border-top:1px solid var(--line);
}
.photo-row{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--line-strong);border:1px solid var(--line-strong)}
.photo-row .photo{border:0}

/* ---------- product hero ---------- */
.p-hero{background:var(--paper);border-bottom:1px solid var(--line);padding:44px 0 40px}
.crumbs{font-family:var(--mono);font-size:11px;letter-spacing:.06em;color:var(--muted);margin-bottom:20px}
.crumbs a{text-decoration:none;color:var(--steel)}
.crumbs a:hover{color:var(--orange)}
.crumbs span{color:var(--line-strong);padding:0 7px}
.p-hero h1{font-size:clamp(26px,3.3vw,38px);max-width:34ch;letter-spacing:-.02em}
.p-hero .lede{margin-top:14px;font-size:16.5px}
.p-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:24px}
.tag{
  font-family:var(--mono);font-size:10.5px;letter-spacing:.09em;text-transform:uppercase;
  border:1px solid var(--line-strong);padding:5px 10px;color:var(--steel);background:#FBFBFA;
}

/* ---------- article ---------- */
.article{max-width:74ch}
.article h2{font-size:23px;margin:42px 0 14px;letter-spacing:-.015em}
.article h3{font-size:17px;margin:28px 0 10px}
.article p,.article li{font-size:16px;line-height:1.75}
.article .answer{
  border-left:3px solid var(--orange);background:var(--paper);padding:20px 24px;
  margin:0 0 30px;font-size:17px;line-height:1.7;
}
.article .answer strong{color:var(--navy)}
.article table{width:100%;border-collapse:collapse;font-size:14px;margin:22px 0}
.article table th,.article table td{padding:9px 12px;border:1px solid var(--line);text-align:left;vertical-align:top}
.article table th{background:#FBFBFA;font-weight:600;color:var(--steel)}
.article .note{
  background:#FBFBFA;border:1px solid var(--line);padding:16px 20px;margin:24px 0;
  font-size:14px;color:var(--muted);
}
.article ol li,.article ul li{margin:.5em 0}

/* ---------- CTA strip ---------- */
.cta{background:var(--navy-deep);color:#EAF1F5;padding:56px 0}
.cta h2{font-size:clamp(22px,2.6vw,30px);max-width:30ch}
.cta p{color:#A9BAC7;margin-top:12px;max-width:60ch}

/* ---------- footer ---------- */
.site-footer{background:#0A1620;color:#9FB0BD;padding:56px 0 30px;font-size:13.5px}
.footer-top{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px}
.footer-brand .brand-name{color:#fff;font-size:14px}
.footer-brand p{margin-top:14px;color:#8FA1AF;max-width:38ch;line-height:1.65}
.footer-col h4{
  font-family:var(--mono);font-size:10px;letter-spacing:.17em;text-transform:uppercase;
  color:#6E8291;margin-bottom:14px;font-weight:600;
}
.footer-col a{display:block;text-decoration:none;color:#A9BAC7;padding:4px 0;font-size:13.5px}
.footer-col a:hover{color:#fff}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  border-top:1px solid rgba(255,255,255,.1);margin-top:40px;padding-top:22px;
  font-size:12px;color:#758795;
}

/* ---------- misc ---------- */
.kv{display:grid;grid-template-columns:auto 1fr;gap:6px 18px;font-size:13.5px;margin:0}
.kv dt{color:var(--muted);font-family:var(--mono);font-size:11px;letter-spacing:.06em;text-transform:uppercase;padding-top:3px}
.kv dd{margin:0}
.anchor{scroll-margin-top:90px}
.notice{
  border:1px solid var(--orange-soft);background:#FDF3EE;padding:14px 18px;
  font-size:13.5px;color:#8A3A17;margin:0 0 20px;
}

@media (max-width:980px){
  .split{grid-template-columns:1fr;gap:36px}
  .grid--3{grid-template-columns:repeat(2,1fr)}
  .hero-facts{grid-template-columns:repeat(2,1fr);gap:0}
  .hero-facts div:nth-child(2){border-right:0}
  .footer-top{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  .wrap{padding:0 20px}
  .section{padding:52px 0}
  .grid--3,.grid--2{grid-template-columns:1fr}
  .price-band{grid-template-columns:1fr}
  .header-inner{height:auto;padding:12px 0;flex-wrap:wrap;gap:10px}
  .nav{
    width:100%;flex-wrap:nowrap;overflow-x:auto;gap:16px;padding-bottom:3px;
    -webkit-overflow-scrolling:touch;scrollbar-width:none;
  }
  .nav::-webkit-scrollbar{display:none}
  .nav a{font-size:12.5px;flex:none}
  .nav .lang{border-left:0;padding-left:4px}
  .photo-row{grid-template-columns:1fr}
  .footer-top{grid-template-columns:1fr}
  .faq .faq-body{max-width:none}
}
@media print{
  .site-header,.cta,.site-footer{display:none}
  body{background:#fff}
}