/* ============================================================
   JINGCHENG — Crane Safety Systems
   Dark industrial design system
   ============================================================ */

/* ---------- tokens ---------- */
@font-face{font-family:'Archivo';font-style:normal;font-weight:400;font-display:swap;src:url('../fonts/archivo-400.woff2') format('woff2')}
@font-face{font-family:'Archivo';font-style:normal;font-weight:500;font-display:swap;src:url('../fonts/archivo-500.woff2') format('woff2')}
@font-face{font-family:'Archivo';font-style:normal;font-weight:600;font-display:swap;src:url('../fonts/archivo-600.woff2') format('woff2')}
@font-face{font-family:'Archivo';font-style:normal;font-weight:700;font-display:swap;src:url('../fonts/archivo-700.woff2') format('woff2')}
@font-face{font-family:'Archivo';font-style:normal;font-weight:800;font-display:swap;src:url('../fonts/archivo-800.woff2') format('woff2')}
@font-face{font-family:'Inter';font-style:normal;font-weight:400;font-display:swap;src:url('../fonts/inter-400.woff2') format('woff2')}
@font-face{font-family:'Inter';font-style:normal;font-weight:500;font-display:swap;src:url('../fonts/inter-500.woff2') format('woff2')}
@font-face{font-family:'Inter';font-style:normal;font-weight:600;font-display:swap;src:url('../fonts/inter-600.woff2') format('woff2')}
@font-face{font-family:'JetBrains Mono';font-style:normal;font-weight:400;font-display:swap;src:url('../fonts/jetbrains-mono-400.woff2') format('woff2')}
@font-face{font-family:'JetBrains Mono';font-style:normal;font-weight:500;font-display:swap;src:url('../fonts/jetbrains-mono-500.woff2') format('woff2')}
@font-face{font-family:'JetBrains Mono';font-style:normal;font-weight:700;font-display:swap;src:url('../fonts/jetbrains-mono-700.woff2') format('woff2')}

:root{
  /* light industrial: white paper, one dark surface for photo-led regions */
  --paper:#FFFFFF;
  --ink-0:#0E1216;          /* dark surface: topbar, hero, footer */
  --ink-1:#F4F6F8;          /* alternating section band */
  --ink-2:#FFFFFF;          /* card / raised surface */
  --ink-3:#EAEEF2;          /* hover, inset well */
  --line:rgba(14,20,26,.12);
  --line-2:rgba(14,20,26,.24);
  --fg:#1A2128;
  --fg-2:#4E5A64;
  --fg-3:#6F7A84;
  --fg-strong:#0A0E12;
  --amber:#F59300;          /* fills, rules, badges — never body text */
  --amber-2:#FFB03A;
  --amber-ink:#9A5A00;      /* amber as text, dark enough for white paper */
  --amber-soft:rgba(245,147,0,.10);
  --plate:#EDF0F3;
  --plate-ink:#12161A;

  --ff-display:'Archivo','Arial Narrow',-apple-system,'Segoe UI',sans-serif;
  --ff-body:'Inter',-apple-system,'Segoe UI','PingFang SC','Microsoft YaHei','Hiragino Sans GB',sans-serif;
  --ff-mono:'JetBrains Mono',ui-monospace,'SFMono-Regular',Menlo,Consolas,monospace;
  --ff-cjk:'PingFang SC','Microsoft YaHei','Hiragino Sans GB','Noto Sans CJK SC',sans-serif;

  --maxw:1320px;
  --pad:clamp(20px,5vw,56px);
  --gap:clamp(20px,3vw,34px);
  --sect:clamp(84px,11vw,144px);
  --hdr:76px;
  --hdr1:68px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
*{margin:0;padding:0}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:calc(var(--hdr) + var(--hdr1) + 24px)}
body{
  background:var(--paper);color:var(--fg);
  font-family:var(--ff-body);font-size:16px;line-height:1.68;
  font-weight:400;letter-spacing:.002em;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
body:lang(zh),.lang-zh body{font-family:var(--ff-cjk)}
img,svg,video{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:none;cursor:pointer}
ul,ol{list-style:none}
:focus-visible{outline:2px solid var(--amber);outline-offset:3px;border-radius:2px}
::selection{background:var(--amber);color:var(--ink-0)}

/* ---------- typography ---------- */
h1,h2,h3,h4{font-family:var(--ff-display);font-weight:700;line-height:1.08;letter-spacing:-.022em;color:var(--fg-strong)}
html[lang="zh-CN"] h1,html[lang="zh-CN"] h2,html[lang="zh-CN"] h3,html[lang="zh-CN"] h4{letter-spacing:0;line-height:1.28}
.display{font-size:clamp(2.6rem,6.4vw,5.1rem);font-weight:800;line-height:.98;letter-spacing:-.035em;text-transform:uppercase}
.h1{font-size:clamp(2.1rem,4.6vw,3.5rem);font-weight:700}
.h2{font-size:clamp(1.7rem,3.2vw,2.6rem);font-weight:700}
.h3{font-size:clamp(1.15rem,1.8vw,1.4rem);font-weight:600;letter-spacing:-.012em}
.lede{font-size:clamp(1.02rem,1.4vw,1.2rem);line-height:1.62;color:var(--fg-2);max-width:62ch}
.mono{font-family:var(--ff-mono);font-size:.76rem;letter-spacing:.1em;text-transform:uppercase}
.dim{color:var(--fg-3)}

.eyebrow{
  display:flex;align-items:center;gap:14px;
  /* four page heads use the eyebrow as their h1; without this the h1 element
     rule's line-height:1.08 shrinks the row and shifts everything under it */
  line-height:inherit;
  font-family:var(--ff-mono);font-size:.72rem;font-weight:500;
  letter-spacing:.2em;text-transform:uppercase;color:var(--amber-ink);
}
.eyebrow::after{content:"";flex:1;height:1px;background:linear-gradient(90deg,var(--line-2),transparent);max-width:120px}
.eyebrow .idx{color:var(--fg-3)}


/* ---------- dark surfaces keep light-on-dark tokens ----------
   The topbar, hero, footer and lightbox sit on the dark surface, so they
   override the same custom properties locally. Adding a class to a new
   dark band is enough; no per-rule colour work. */
.hero,.site-footer,.lightbox{
  --fg:#E8EBEF;
  --fg-2:#A3ADBA;
  --fg-3:#7C8792;
  --fg-strong:#FFFFFF;
  --line:rgba(255,255,255,.10);
  --line-2:rgba(255,255,255,.20);
  --amber:#FFA224;
  --amber-ink:#FFB954;
}

/* ---------- layout ---------- */
.wrap{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:var(--pad)}
.sect{padding-block:var(--sect);position:relative}
.sect--tight{padding-block:clamp(56px,7vw,88px)}
.sect--alt{background:var(--ink-1)}
.sect--rule{border-top:1px solid var(--line)}
.sect-head{max-width:74ch;margin-bottom:clamp(40px,5vw,68px)}
.sect-head .h2{margin-top:18px}
.sect-head .lede{margin-top:16px}
.grid{display:grid;gap:var(--gap)}
.stack-lg{display:grid;gap:clamp(48px,6vw,88px)}
.stack{display:grid;gap:var(--gap)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:15px 30px;font-family:var(--ff-display);font-size:.83rem;font-weight:600;
  letter-spacing:.13em;text-transform:uppercase;
  border:1px solid transparent;border-radius:2px;
  transition:background .28s var(--ease),color .28s var(--ease),border-color .28s var(--ease),transform .28s var(--ease);
  white-space:nowrap;
}
.btn svg{width:14px;height:14px;flex:none}
.btn--primary{background:var(--amber);color:#0A0A0A;font-weight:700}
.btn--primary:hover{background:var(--amber-2);transform:translateY(-2px)}
.btn--outline{border-color:var(--line-2);color:var(--fg)}
.btn--outline:hover{border-color:var(--amber-ink);color:var(--amber-ink)}
.btn--sm{padding:11px 20px;font-size:.74rem}
.btn--wide{padding-inline:38px}

.link-amber{
  display:inline-flex;align-items:center;gap:9px;
  font-family:var(--ff-mono);font-size:.75rem;letter-spacing:.14em;text-transform:uppercase;
  color:var(--amber-ink);padding-block:4px;border-bottom:1px solid transparent;transition:gap .25s var(--ease)
}
.link-amber:hover{gap:15px;border-bottom-color:var(--amber-ink)}
.link-amber::after{content:"→"}

/* ---------- topbar ---------- */
/* ---------- header: row 1 identity, row 2 navigation ---------- */
.site-header{position:sticky;top:0;z-index:90;background:rgba(255,255,255,.92);backdrop-filter:blur(14px);border-bottom:1px solid var(--line);transition:border-color .3s,background .3s}
.site-header .wrap{display:flex;align-items:center;gap:clamp(18px,3vw,46px)}
.head-row1{height:var(--hdr1);gap:20px;border-bottom:1px solid var(--line)}
.head-row2{height:var(--hdr)}
.head-tag{flex:1 1 auto;text-align:center;font-family:var(--ff-display);font-size:1.5rem;font-weight:700;letter-spacing:.06em;color:var(--fg-strong);min-width:0;white-space:normal;line-height:1.12}
.brand-cn{display:block;font-family:var(--ff-display);font-size:.95rem;font-weight:700;letter-spacing:.01em;color:var(--fg-strong);white-space:nowrap}
.brand-en{display:block;font-size:.6rem;letter-spacing:.045em;color:var(--fg-3);white-space:nowrap;margin-top:2px}
.brand{display:flex;align-items:center;gap:13px;flex:none}
.brand-mark{
  width:38px;height:38px;flex:none;display:grid;place-items:center;
  border:1px solid var(--amber);color:var(--amber-ink);
  font-family:var(--ff-mono);font-size:.82rem;font-weight:700;letter-spacing:.02em;border-radius:2px;
}
/* The company trademark is a roundel with its own amber ring: wrapping it in
   the square outline used for the old text mark cut across the logo. */
img.brand-mark{border:0;border-radius:50%;object-fit:contain}
.brand-txt{line-height:1.15;min-width:0}
.brand-name{display:block;font-family:var(--ff-display);font-size:1.03rem;font-weight:700;letter-spacing:.09em;text-transform:uppercase;color:var(--fg-strong)}
.brand-sub{display:block;font-family:var(--ff-mono);font-size:.56rem;letter-spacing:.19em;text-transform:uppercase;color:var(--fg-3)}
html[lang="zh-CN"] .brand-sub{letter-spacing:.1em}

.nav{display:flex;align-items:center;gap:clamp(4px,1.2vw,14px)}
.nav-link{
  position:relative;display:block;padding:28px 12px;
  font-family:var(--ff-display);font-size:.85rem;font-weight:500;letter-spacing:.05em;color:var(--fg-2);
  transition:color .22s
}
.nav-link:hover,.nav-link[aria-current="page"]{color:var(--fg-strong)}
.nav-link::after{content:"";position:absolute;left:12px;right:12px;bottom:20px;height:1px;background:var(--amber);transform:scaleX(0);transform-origin:left;transition:transform .3s var(--ease)}
.nav-link:hover::after,.nav-link[aria-current="page"]::after{transform:scaleX(1)}
.has-sub{position:relative}
.has-sub>.nav-link{display:flex;align-items:center;gap:6px}
.caret{width:8px;height:8px;border-right:1.4px solid currentColor;border-bottom:1.4px solid currentColor;transform:rotate(45deg) translate(-2px,-2px);opacity:.6}
.submenu{
  position:absolute;top:100%;left:-8px;min-width:294px;padding:10px;
  background:var(--ink-2);border:1px solid var(--line);border-radius:3px;
  box-shadow:0 18px 44px rgba(14,20,26,.16);
  opacity:0;visibility:hidden;transform:translateY(9px);transition:.24s var(--ease)
}
.has-sub:hover .submenu,.has-sub:focus-within .submenu{opacity:1;visibility:visible;transform:translateY(0)}
.submenu a{display:flex;flex-direction:column;gap:2px;padding:11px 14px;border-radius:2px;transition:background .2s}
.submenu a:hover{background:var(--ink-3)}
.submenu .st{font-family:var(--ff-display);font-size:.87rem;font-weight:600;color:var(--fg)}
.submenu .sd{font-size:.74rem;color:var(--fg-3);font-family:var(--ff-mono);letter-spacing:.04em}
.submenu a:hover .st{color:var(--amber-ink)}

.header-cta{display:flex;align-items:center;gap:16px;flex:none;margin-left:auto}
.nav-toggle{display:none;width:44px;height:44px;place-items:center;border:1px solid var(--line);border-radius:2px}
.nav-toggle span{display:block;width:17px;height:1px;background:var(--fg);position:relative;transition:.25s}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:17px;height:1px;background:var(--fg);transition:.25s}
.nav-toggle span::before{top:-5px}.nav-toggle span::after{top:5px}
body.nav-open .nav-toggle span{background:transparent}
body.nav-open .nav-toggle span::before{transform:rotate(45deg);top:0}
body.nav-open .nav-toggle span::after{transform:rotate(-45deg);top:0}

/* ---------- language switch ---------- */
.lang{display:inline-flex;align-items:center;border:1px solid var(--line);border-radius:2px;overflow:hidden;flex:none}
.lang button{
  padding:8px 13px;font-family:var(--ff-mono);font-size:.7rem;letter-spacing:.1em;
  color:var(--fg-3);transition:color .2s,background .2s;line-height:1
}
.lang button[aria-pressed="true"]{color:var(--amber-ink);background:var(--amber-soft)}
.lang button:hover{color:var(--fg)}
.lang .sep{width:1px;height:15px;background:var(--line)}

/* ---------- hero ---------- */
.hero{position:relative;min-height:min(88vh,820px);display:flex;align-items:flex-end;overflow:hidden;background:var(--ink-0)}
.hero-media{position:absolute;inset:0;z-index:0}
.hero-slide{position:absolute;inset:0;opacity:0;transition:opacity 1.1s var(--ease);background-size:cover;background-position:center}
.hero-slide.is-on{opacity:1}
/* Two stacked gradients, but tuned so the photograph still reads as a sunny
   yard: the previous values took the frame from 123 to 37 mean luminance.
   These hold the headline zone at 4.7:1 for white text (AA needs 3:1 at display
   size) while lifting the frame back to 54. Re-measure if a brighter banner
   photo replaces this one. */
.hero-scrim{position:absolute;inset:0;background:
  linear-gradient(180deg,rgba(8,9,11,.52) 0%,rgba(8,9,11,.18) 34%,rgba(8,9,11,.78) 78%,var(--ink-0) 100%),
  linear-gradient(90deg,rgba(8,9,11,.74) 0%,rgba(8,9,11,.18) 52%,transparent 82%)}
.hero-body{position:relative;z-index:2;width:100%;padding-block:clamp(48px,7vw,88px) clamp(30px,3.6vw,44px)}
.hero-body .display{max-width:17ch}
/* The registered company name belongs in the first screen: an overseas buyer
   needs to see who they are dealing with, not only the Jingcheng trade name.
   Kept at body weight and a readable colour — set dimmer it went unnoticed. */
.hero-body .lede{margin-top:26px;max-width:52ch;color:#C9D1DB}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:clamp(30px,4vw,44px)}
/* the hero's old button pair is gone; the line that replaces it is the page's
   promise, so it is set as display type rather than body copy */
.hero-slogan{margin-top:clamp(26px,3.4vw,42px);max-width:26ch;
  font-family:var(--ff-display);font-weight:700;font-size:clamp(1.35rem,3vw,2.35rem);
  line-height:1.28;letter-spacing:-.015em;color:#F4F7FA}
.hero-meta{display:flex;flex-wrap:wrap;gap:clamp(22px,4vw,54px);margin-top:clamp(34px,4.5vw,52px);padding-top:26px;border-top:1px solid var(--line)}
.hero-meta div{display:flex;flex-direction:column;gap:3px}
.hero-meta b{font-family:var(--ff-display);font-size:1.55rem;font-weight:700;color:var(--fg-strong);letter-spacing:-.02em}
.hero-meta span{font-family:var(--ff-mono);font-size:.68rem;letter-spacing:.14em;text-transform:uppercase;color:var(--fg-3)}
.hero-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:26px}
.tag{font-family:var(--ff-mono);font-size:.66rem;letter-spacing:.13em;text-transform:uppercase;color:var(--fg-2);border:1px solid var(--line);padding:6px 12px;border-radius:2px;background:rgba(8,9,11,.4)}

/* page head (interior pages) */
.page-head{position:relative;padding-block:clamp(72px,10vw,124px) clamp(46px,6vw,72px);border-bottom:1px solid var(--line);overflow:hidden}
.page-head .bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.38;filter:saturate(.9)}
/* the headline sits on the left, so the veil is solid there and lets the photo
   through on the right; on phones the photo sits behind the whole text column */
.page-head::before{content:"";position:absolute;inset:0;z-index:1;pointer-events:none;
  background:linear-gradient(100deg,rgba(255,255,255,.94) 0%,rgba(255,255,255,.8) 42%,rgba(255,255,255,.12) 78%,rgba(255,255,255,0) 100%)}
.page-head .wrap{position:relative;z-index:1}
/* a supplied banner is artwork on white, so the head wash would erase it */
.page-head--plain{padding-block:0 clamp(30px,4vw,54px)}
.page-head--plain::before{display:none}
.page-head--plain .head-band{display:block;width:100%;height:auto}
.page-head--plain .wrap{padding-top:clamp(22px,3vw,34px)}
.page-head--plain .banner{position:relative}
/* the supplied banner is artwork on white with an empty middle, so the headline
   sits in that gap; below 900px the gap is gone and the text drops under the art */
.banner-txt{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
  width:min(58%,860px);text-align:center;z-index:1}
.banner-h1{font-size:clamp(1.05rem,2.05vw,1.85rem);font-weight:700;line-height:1.34;
  letter-spacing:-.005em;color:var(--fg-strong)}
.banner-l1,.banner-l2{display:block}
.banner-sub{margin-top:.55em;font-size:clamp(.8rem,1.05vw,.98rem);line-height:1.55;color:var(--fg-2)}
@media (max-width:900px){
  .page-head--plain .banner-txt{position:static;transform:none;width:auto;
    padding:clamp(20px,5vw,34px) var(--pad) 0;text-align:left}
}
.page-head .h1{margin-top:20px;max-width:22ch}
.page-head .lede{margin-top:20px}
/* full-bleed location strip: the photo is the subject, so it carries no veil */
.bleach{margin:34px 0 0}
.bleach img{width:100%;aspect-ratio:8/3;object-fit:cover;object-position:50% 62%;display:block;border:1px solid var(--line);border-radius:3px}
.bleach figcaption{padding:12px 2px 0;font-family:var(--ff-mono);font-size:.66rem;letter-spacing:.1em;text-transform:uppercase;color:var(--fg-3)}

/* ---------- cards ---------- */
.card{background:var(--ink-1);border:1px solid var(--line);border-radius:3px;overflow:hidden;transition:border-color .3s var(--ease),transform .3s var(--ease),background .3s}
.card:hover{border-color:var(--line-2);transform:translateY(-3px)}
.card-body{padding:clamp(20px,2.4vw,30px)}
.card-kicker{font-family:var(--ff-mono);font-size:.68rem;letter-spacing:.15em;text-transform:uppercase;color:var(--amber-ink);margin-bottom:11px}
.card-title{font-family:var(--ff-display);font-size:1.16rem;font-weight:600;color:var(--fg-strong);letter-spacing:-.01em}
.card-text{font-size:.92rem;color:var(--fg-2);margin-top:9px;line-height:1.66}
.card-figure{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--ink-2)}
.card-figure img{width:100%;height:100%;object-fit:cover;transition:transform .8s var(--ease),filter .5s}
.card:hover .card-figure img{transform:scale(1.055)}
.card-figure::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 46%,rgba(8,9,11,.72));opacity:.9}
/* a tiled collage must keep its own grid, so no crop and no caption veil */
.card-figure--collage{aspect-ratio:auto;overflow:visible;background:none}
.card-figure--collage img{width:100%;height:auto;object-fit:initial}
.card-figure--collage::after{display:none}
.card-figure--collage figcaption{padding:12px 2px 0;font-family:var(--ff-mono);font-size:.66rem;letter-spacing:.1em;text-transform:uppercase;color:var(--fg-3)}

/* numbered index in corner */
.card-idx{position:absolute;top:14px;left:14px;z-index:2;font-family:var(--ff-mono);font-size:.68rem;letter-spacing:.1em;color:#DCE2E9;background:rgba(8,9,11,.62);border:1px solid var(--line-2);padding:4px 8px;border-radius:2px;backdrop-filter:blur(6px)}

/* solution cards */
.sol-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:1px;background:var(--line);border:1px solid var(--line)}
.sol{position:relative;background:var(--ink-1);padding:clamp(24px,2.6vw,34px);display:flex;flex-direction:column;gap:14px;min-height:250px;transition:background .3s}
.sol:hover{background:var(--ink-2)}
.sol .n{font-family:var(--ff-mono);font-size:.7rem;letter-spacing:.12em;color:var(--fg-3)}
.sol h3{font-size:1.22rem;font-weight:600;color:var(--fg-strong)}
.sol p{font-size:.88rem;color:var(--fg-2);line-height:1.6}
.sol ul{margin-top:auto;display:flex;flex-wrap:wrap;gap:6px}
.sol li{font-family:var(--ff-mono);font-size:.63rem;letter-spacing:.08em;text-transform:uppercase;color:var(--fg-3);border:1px solid var(--line);padding:4px 9px;border-radius:2px}
.sol::after{content:"";position:absolute;left:0;top:0;width:2px;height:0;background:var(--amber);transition:height .35s var(--ease)}
.sol:hover::after{height:100%}

/* product rows */
.prod-row{display:grid;grid-template-columns:minmax(0,.92fr) minmax(0,1.08fr);gap:clamp(26px,4vw,64px);align-items:center;padding-block:clamp(38px,5vw,62px);border-top:1px solid var(--line)}
.prod-row:nth-child(even) .prod-fig{order:2}
.prod-fig{position:relative;background:var(--ink-1);border:1px solid var(--line);border-radius:3px;overflow:hidden;aspect-ratio:4/3}
.prod-fig img{width:100%;height:100%;object-fit:cover}
.prod-specs{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:1px;background:var(--line);border:1px solid var(--line);margin-top:26px}
.prod-specs div{background:var(--ink-1);padding:14px 16px}
.prod-specs dt{font-family:var(--ff-mono);font-size:.63rem;letter-spacing:.13em;text-transform:uppercase;color:var(--fg-3)}
.prod-specs dd{font-family:var(--ff-display);font-size:1.02rem;font-weight:600;color:var(--fg);margin-top:4px}
/* per-class 系统配置 list -- values are long phrases, so the label column is
   fixed and the value column is left aligned and allowed to wrap */
.cfg-cap{margin-top:26px;font-family:var(--ff-mono);font-size:.63rem;letter-spacing:.13em;text-transform:uppercase;color:var(--fg-3)}
.cfg{display:grid;margin-top:6px}
.cfg>div{display:grid;grid-template-columns:minmax(78px,30%) 1fr;gap:14px;padding:9px 0;border-bottom:1px dashed var(--line)}
.cfg>div:last-child{border-bottom:none}
.cfg dt{font-size:.76rem;color:var(--fg-3)}
.cfg dd{margin:0;font-size:.88rem;font-weight:600;color:var(--fg-strong)}
.cfg-note{margin-top:12px;font-size:.84rem;line-height:1.62;color:var(--fg-2)}
.cfg-note+.cfg-note{margin-top:6px}

/* sensor catalog */
.cat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(232px,1fr));gap:1px;background:var(--line);border:1px solid var(--line)}
.cat{background:var(--ink-1);padding:22px;display:flex;flex-direction:column;gap:12px;transition:background .3s}
.cat:hover{background:var(--ink-2)}
.plate{background:var(--plate);border-radius:2px;padding:14px;display:grid;place-items:center;aspect-ratio:4/3;overflow:hidden}
.plate img{width:100%;height:100%;object-fit:contain;mix-blend-mode:multiply}
.cat h4{font-family:var(--ff-display);font-size:1rem;font-weight:600;color:var(--fg-strong)}
.cat p{font-size:.8rem;color:var(--fg-3);line-height:1.55}
.cat .code{font-family:var(--ff-mono);font-size:.63rem;letter-spacing:.12em;color:var(--amber-ink)}
/* clickable product sheet: the plate becomes a lightbox cell without leaving the card */
button.plate{width:100%;text-align:inherit}
button.plate:hover{outline:1px solid var(--amber);outline-offset:-1px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* schematic plates: light-background technical artwork, framed so it reads as
   a deliberate drawing rather than a photo that failed to match the theme */
.plate-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:1px;background:var(--line);border:1px solid var(--line)}
.plate-fig{background:var(--ink-1);padding:18px;display:flex;flex-direction:column;gap:14px}
.plate-fig .sheet{background:linear-gradient(160deg,#F2F5F8,#DDE4EC);border-radius:2px;padding:6px}
.plate-fig img{width:100%;aspect-ratio:16/12;object-fit:contain;display:block}
.plate-fig h4{font-family:var(--ff-display);font-size:1rem;font-weight:600;color:var(--fg-strong)}
.plate-fig p{font-size:.8rem;color:var(--fg-3);line-height:1.55}
.plate-fig .kind{font-family:var(--ff-mono);font-size:.62rem;letter-spacing:.14em;text-transform:uppercase;color:var(--amber-ink)}

/* ---------- model index: product sheets pinned to the dark wall ---------- */
/* per-model click-open specification list on the product cards */
.model .acc{margin-top:16px;border-top:1px solid var(--line)}
.model .acc-item{border-bottom:none}
.model .acc-btn{padding:13px 0;font-family:var(--ff-display);font-size:.95rem;letter-spacing:0;text-transform:none}
.model .acc-btn .sign{width:22px;height:22px;font-size:.8rem}
.mspec{display:grid;padding-bottom:14px}
.mspec>div{display:flex;justify-content:space-between;align-items:baseline;gap:16px;padding:7px 0;border-bottom:1px dashed var(--line)}
.mspec>div:last-child{border-bottom:none}
.mspec dt{flex:none;font-size:.76rem;color:var(--fg-3)}
.mspec dd{margin:0;font-family:var(--ff-display);font-size:.86rem;font-weight:600;color:var(--fg-strong);text-align:right}
.model-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(286px,1fr));gap:1px;background:var(--line);border:1px solid var(--line)}
.model{background:var(--ink-1);display:flex;flex-direction:column;transition:background .3s}
.model:hover{background:var(--ink-2)}
.model .sheet{background:linear-gradient(160deg,#F4F6F9,#DCE3EB);padding:8px;margin:18px 18px 0;border-radius:2px}
.model .sheet img{width:100%;aspect-ratio:16/11;object-fit:cover;display:block}
.model .body{padding:18px 18px 22px;display:flex;flex-direction:column;gap:8px;flex:1}
.model .code{font-family:var(--ff-mono);font-size:1.02rem;font-weight:700;letter-spacing:.09em;color:var(--amber-ink)}
.model h4{font-family:var(--ff-display);font-size:1.02rem;font-weight:600;color:var(--fg-strong)}
.model p{font-size:.82rem;color:var(--fg-2);line-height:1.6}
.model .form{font-family:var(--ff-mono);font-size:.62rem;letter-spacing:.14em;text-transform:uppercase;color:var(--fg-3);margin-top:auto;padding-top:10px;border-top:1px solid var(--line)}

/* ---------- spec table ---------- */
.spec{width:100%;border-collapse:collapse;font-size:.9rem}
.spec caption{text-align:left;font-family:var(--ff-mono);font-size:.7rem;letter-spacing:.15em;text-transform:uppercase;color:var(--fg-3);padding-bottom:14px}
.spec th,.spec td{padding:15px 18px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.spec thead th{font-family:var(--ff-mono);font-size:.66rem;letter-spacing:.14em;text-transform:uppercase;color:var(--fg-3);font-weight:500;border-bottom-color:var(--line-2)}
.spec tbody th{font-family:var(--ff-display);font-weight:600;color:var(--fg-strong);width:min(30%,240px)}
.spec td{color:var(--fg-2);font-family:var(--ff-mono);font-size:.82rem;letter-spacing:.01em}
.spec tbody tr:hover{background:var(--ink-1)}

/* ---------- feature list ---------- */
.flist{display:grid;gap:16px}
.flist li{display:grid;grid-template-columns:24px 1fr;gap:14px;align-items:start;font-size:.94rem;color:var(--fg-2)}
.flist .tick{width:20px;height:20px;margin-top:3px;border:1px solid var(--amber);border-radius:2px;display:grid;place-items:center;color:var(--amber-ink);font-size:.62rem;font-family:var(--ff-mono)}
.flist b{color:var(--fg-strong);font-weight:600;display:block;font-family:var(--ff-display);letter-spacing:-.005em}

/* ---------- metrics band ---------- */
.band{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:1px;background:var(--line);border-block:1px solid var(--line)}
.band>div{background:var(--ink-0);padding:clamp(28px,3.4vw,44px) clamp(20px,2.4vw,30px)}
.band b{display:block;font-family:var(--ff-display);font-size:clamp(2.1rem,3.6vw,3rem);font-weight:800;color:var(--fg-strong);letter-spacing:-.035em;line-height:1}
.band b i{font-style:normal;color:var(--amber-ink)}
.band span{display:block;margin-top:10px;font-family:var(--ff-mono);font-size:.68rem;letter-spacing:.15em;text-transform:uppercase;color:var(--fg-3)}
.band p{margin-top:10px;font-size:.84rem;color:var(--fg-2);line-height:1.6}

/* ---------- split layout ---------- */
.split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:clamp(30px,5vw,76px);align-items:center}
.split--wide-left{grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr)}
.figure{position:relative;border:1px solid var(--line);border-radius:3px;overflow:hidden;background:var(--ink-1)}
.figure img{width:100%;height:100%;object-fit:cover;display:block}
.figure--tall{aspect-ratio:4/5}
.figure--wide{aspect-ratio:16/10}
.figure--sheet{aspect-ratio:10/9}
.figure figcaption{position:absolute;left:0;bottom:0;right:0;padding:16px 18px;font-family:var(--ff-mono);font-size:.66rem;letter-spacing:.12em;text-transform:uppercase;color:#DCE2E9;background:linear-gradient(transparent,rgba(8,9,11,.86))}
.figure .tag-schematic{position:absolute;top:12px;left:12px;z-index:3;font-family:var(--ff-mono);font-size:.6rem;letter-spacing:.15em;text-transform:uppercase;color:var(--amber-ink);background:rgba(8,9,11,.8);border:1px solid var(--amber);padding:4px 9px;border-radius:2px;backdrop-filter:blur(6px)}
.figure--schematic{background:var(--ink-0)}
.figure--schematic img{object-fit:contain}

.hairline-frame{position:relative}
.hairline-frame::before{content:"";position:absolute;inset:-1px;border:1px solid var(--line);pointer-events:none;z-index:2}

/* ---------- process / steps ---------- */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:1px;background:var(--line);border:1px solid var(--line)}
.step{background:var(--ink-0);padding:clamp(24px,2.6vw,34px);display:flex;flex-direction:column;gap:12px}
.step .n{font-family:var(--ff-mono);font-size:2rem;font-weight:700;color:var(--ink-3);line-height:1;letter-spacing:-.04em}
.step h4{font-family:var(--ff-display);font-size:1.05rem;font-weight:600;color:var(--fg-strong)}
.step p{font-size:.86rem;color:var(--fg-2);line-height:1.62}

/* ---------- gallery ---------- */
.gal{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:1px;background:var(--line);border:1px solid var(--line)}
.gal--two{grid-template-columns:repeat(auto-fit,minmax(min(430px,100%),1fr))}
.gal-cell{position:relative;background:var(--ink-1);display:flex;flex-direction:column;width:100%;text-align:left;transition:background .3s}
.gal-cell:hover{background:var(--ink-2)}
.gal .shot{display:block;position:relative;aspect-ratio:4/3;overflow:hidden}
.gal .shot img{width:100%;height:100%;object-fit:cover;transition:transform .7s var(--ease)}
.gal-cell:hover .shot img{transform:scale(1.06)}
/* caption sits below the image and is always visible — hover-only labels are
   unreachable on touch, and an invisible label defeats the point of a record */
.gal .cap{display:block;padding:13px 15px;font-family:var(--ff-mono);font-size:.66rem;line-height:1.5;letter-spacing:.06em;color:var(--fg-2);border-top:1px solid var(--line)}
.gal-cell[hidden]{display:none}

.chips{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:30px}
/* one row, never wrapping: below ~700px the row scrolls sideways instead of
   dropping to a second line or shrinking past reading size */
.class-list{display:flex;flex-wrap:nowrap;gap:clamp(12px,1.8vw,26px);margin-top:26px;
  font-family:var(--ff-display);font-weight:700;font-size:clamp(.8rem,1.5vw,1.45rem);
  line-height:1.35;letter-spacing:-.005em;white-space:nowrap;overflow-x:auto;
  scrollbar-width:none;padding-bottom:4px}
.class-list::-webkit-scrollbar{display:none}
@media (max-width:700px){.class-list{-webkit-mask-image:linear-gradient(90deg,#000 78%,transparent 100%);
  mask-image:linear-gradient(90deg,#000 78%,transparent 100%)}}
.class-list a{color:var(--fg-strong);text-decoration:none;border-bottom:3px solid transparent;transition:color .22s,border-color .22s}
.class-list a:hover,.class-list a:focus-visible{color:var(--amber-ink);border-bottom-color:var(--amber)}
@media (max-width:620px){.class-list{gap:2px 16px;font-size:clamp(1.05rem,3.5vw,1.3rem)}}
.chip{font-family:var(--ff-mono);font-size:.68rem;letter-spacing:.12em;text-transform:uppercase;color:var(--fg-3);border:1px solid var(--line);padding:9px 15px;border-radius:2px;transition:.22s}
.chip:hover{color:var(--fg);border-color:var(--line-2)}
.chip[aria-pressed="true"]{color:var(--amber-ink);border-color:var(--amber-ink);background:var(--amber-soft)}
.gal button[hidden]{display:none}

/* ---------- lightbox ---------- */
.lightbox{position:fixed;inset:0;z-index:200;display:none;place-items:center;background:rgba(4,5,6,.95);padding:clamp(16px,4vw,52px)}
.lightbox.is-on{display:grid}
.lightbox img{max-width:min(1150px,92vw);max-height:80vh;object-fit:contain;border:1px solid var(--line-2)}
.lightbox .lb-cap{margin-top:16px;font-family:var(--ff-mono);font-size:.72rem;letter-spacing:.1em;color:var(--fg-2);text-align:center;text-transform:uppercase}
.lb-close{position:absolute;top:22px;right:26px;width:44px;height:44px;display:grid;place-items:center;border:1px solid var(--line-2);border-radius:2px;color:var(--fg);font-size:1.2rem}
.lb-close:hover{border-color:var(--amber-ink);color:var(--amber-ink)}
.lb-nav{position:absolute;top:50%;transform:translateY(-50%);width:48px;height:48px;display:grid;place-items:center;border:1px solid var(--line-2);border-radius:2px;color:var(--fg);font-size:1.1rem}
.lb-nav:hover{border-color:var(--amber-ink);color:var(--amber-ink)}
.lb-prev{left:clamp(10px,2vw,28px)}.lb-next{right:clamp(10px,2vw,28px)}

/* ---------- CTA band ---------- */
.cta{position:relative;border:1px solid var(--line);background:
  radial-gradient(120% 160% at 8% 0%,rgba(245,147,0,.13),transparent 58%),var(--ink-1);
  padding:clamp(38px,6vw,76px);display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,.75fr);gap:clamp(26px,4vw,56px);align-items:center}
.cta h2{font-size:clamp(1.6rem,2.9vw,2.4rem);font-weight:700}
.cta p{margin-top:14px;color:var(--fg-2);max-width:52ch}
.cta-actions{display:flex;flex-direction:column;gap:12px}
.cta-actions .btn{width:100%}

/* ---------- contact ---------- */
.info-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1px;background:var(--line);border:1px solid var(--line)}
.info{background:var(--ink-1);padding:clamp(22px,2.6vw,32px)}
.info dt{font-family:var(--ff-mono);font-size:.66rem;letter-spacing:.15em;text-transform:uppercase;color:var(--fg-3)}
.info dd{margin-top:9px;font-size:1rem;color:var(--fg);line-height:1.55;word-break:break-word}
.info dd a:hover{color:var(--amber-ink)}
.info dd .note{display:block;margin-top:6px;font-size:.78rem;color:var(--fg-3)}

.field{display:grid;gap:8px}
.field label{font-family:var(--ff-mono);font-size:.66rem;letter-spacing:.14em;text-transform:uppercase;color:var(--fg-3)}
.field input,.field textarea,.field select{
  background:var(--ink-1);border:1px solid var(--line);border-radius:2px;color:var(--fg);
  padding:14px 16px;font-family:var(--ff-body);font-size:.94rem;transition:border-color .25s;width:100%
}
.field input:focus,.field textarea:focus,.field select:focus{outline:none;border-color:var(--amber-ink)}
.field textarea{min-height:132px;resize:vertical}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.form-grid .full{grid-column:1/-1}

/* ---------- accordion ---------- */
.acc{border-top:1px solid var(--line)}
.acc-item{border-bottom:1px solid var(--line)}
.acc-btn{width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:24px 4px;text-align:left;font-family:var(--ff-display);font-size:clamp(1rem,1.6vw,1.22rem);font-weight:600;color:var(--fg-strong);transition:color .22s}
.acc-btn:hover{color:var(--amber-ink)}
.acc-btn .sign{flex:none;width:26px;height:26px;display:grid;place-items:center;border:1px solid var(--line-2);border-radius:2px;font-family:var(--ff-mono);font-size:.9rem;color:var(--amber-ink);transition:transform .3s var(--ease)}
.acc-item.is-open .sign{transform:rotate(45deg)}
.acc-panel{display:grid;grid-template-rows:0fr;transition:grid-template-rows .38s var(--ease)}
.acc-item.is-open .acc-panel{grid-template-rows:1fr}
.acc-panel>div{overflow:hidden}
.acc-panel p{padding-bottom:26px;color:var(--fg-2);font-size:.94rem;max-width:78ch}

/* ---------- footer ---------- */
.site-footer{border-top:1px solid var(--line);background:var(--ink-0);padding-block:clamp(52px,6vw,80px) 0}
.foot-grid{display:grid;grid-template-columns:minmax(0,1.5fr) repeat(3,minmax(0,1fr));gap:clamp(28px,4vw,56px)}
.foot-brand .brand-name{font-size:1.24rem}
.foot-brand p{margin-top:18px;font-size:.88rem;color:var(--fg-3);max-width:38ch;line-height:1.7}
.foot-col h4{font-family:var(--ff-mono);font-size:.66rem;letter-spacing:.16em;text-transform:uppercase;color:var(--fg-3);font-weight:500;margin-bottom:18px}
.foot-col li+li{margin-top:11px}
.foot-col a{font-size:.9rem;color:var(--fg-2);transition:color .2s}
.foot-col a:hover{color:var(--amber-ink)}
.foot-bottom{display:flex;flex-wrap:wrap;gap:16px;justify-content:space-between;align-items:center;margin-top:clamp(44px,5vw,68px);padding-block:26px;border-top:1px solid var(--line);font-family:var(--ff-mono);font-size:.68rem;letter-spacing:.08em;color:var(--fg-3)}
.foot-bottom a:hover{color:var(--amber-ink)}

/* ---------- misc ---------- */
.skip{position:absolute;left:-9999px;top:0;z-index:999;background:var(--amber);color:#0A0A0A;padding:12px 20px;font-family:var(--ff-mono);font-size:.75rem}
.skip:focus{left:12px;top:12px}
.note-box{border:1px dashed var(--line-2);background:var(--ink-1);padding:20px 24px;border-radius:3px;font-size:.86rem;color:var(--fg-3)}
.note-box b{color:var(--amber-ink);font-family:var(--ff-mono);font-size:.7rem;letter-spacing:.13em;text-transform:uppercase;display:block;margin-bottom:8px}
.breadcrumbs{font-family:var(--ff-mono);font-size:.68rem;letter-spacing:.12em;text-transform:uppercase;color:var(--fg-3);margin-bottom:26px}
.breadcrumbs a:hover{color:var(--amber-ink)}
.breadcrumbs span{color:var(--fg-2)}
.divider{height:1px;background:var(--line);border:none}

/* ---------- reveal (only armed once JS is confirmed present, so a failed
   script load can never leave a section permanently invisible) ---------- */
.js [data-reveal]{opacity:0;transform:translateY(20px);transition:opacity .7s var(--ease),transform .7s var(--ease);transition-delay:var(--d,0ms)}
.js [data-reveal].is-in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:1120px){
  .nav-link{padding-inline:9px;font-size:.8rem}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:960px){
  :root{--hdr:66px;--hdr1:58px}
  .head-tag{font-size:1.1rem}  .cta{grid-template-columns:1fr}
  .split,.prod-row{grid-template-columns:1fr}
  .prod-row:nth-child(even) .prod-fig{order:0}
  .hero{min-height:min(80vh,700px)}
}
@media (max-width:860px){
  /* Row 1 has to hold a 15-character legal name plus the switch buttons; the
     tagline is the first thing to go, and the hero eyebrow still carries it. */
  .head-tag{display:none}
  .head-row1{gap:12px}
  .nav-toggle{display:grid}
  .nav{
    position:fixed;inset:calc(var(--hdr) + var(--hdr1)) 0 auto;flex-direction:column;align-items:stretch;gap:0;
    margin:0;padding:14px var(--pad) 34px;background:var(--paper);border-bottom:1px solid var(--line);
    max-height:calc(100dvh - var(--hdr) - var(--hdr1));overflow-y:auto;
    transform:translateY(-102%);transition:transform .4s var(--ease);visibility:hidden
  }
  body.nav-open .nav{transform:translateY(0);visibility:visible}
  .nav-link{padding:17px 0;font-size:1rem;border-bottom:1px solid var(--line)}
  .nav-link::after{display:none}
  .has-sub .submenu{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;border:none;border-left:1px solid var(--line);border-radius:0;padding:4px 0 4px 16px;min-width:0;background:transparent;display:none}
  .has-sub.is-open .submenu{display:block}
  .has-sub>.nav-link::before{content:"";display:none}
  .header-cta .btn{display:none}
  .form-grid{grid-template-columns:1fr}
}
@media (max-width:620px){
  body{font-size:15.5px}
  .page-head::before{background:linear-gradient(180deg,rgba(255,255,255,.98),rgba(255,255,255,.93) 60%,rgba(255,255,255,.8))}
  .brand-cn{font-size:.8rem}
  .brand-en{font-size:.5rem;letter-spacing:.02em}
  .brand-mark{width:32px;height:32px}
  .hero-meta{gap:20px 26px}
  .hero-actions .btn{flex:1 1 100%}
  .foot-grid{grid-template-columns:1fr}
  .bleach img{aspect-ratio:16/6}
  .sol-grid,.cat-grid,.gal{grid-template-columns:1fr}
  /* The spec table is width:100% but a table never shrinks below its min-content
     width, so long mono values pushed it to 402px inside a 375px viewport and the
     whole page scrolled sideways. overflow-wrap:anywhere is the one property that
     lowers a table's min-content (break-word does not). */
  .spec th,.spec td{padding:12px 12px;overflow-wrap:anywhere}
  .spec tbody th{width:40%}
}

/* 320px is the only width where a 15-character legal name and the language
   switch genuinely cannot both fit; everything else gives before the name does. */
@media (max-width:400px){
  .brand{gap:9px}
  .brand-mark{width:28px;height:28px}
  .brand-cn{font-size:.72rem}
  .brand-en{font-size:.44rem;letter-spacing:0}
  .lang button{padding:8px 9px}
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important;scroll-behavior:auto!important}
  [data-reveal]{opacity:1;transform:none}
  .card:hover,.gal button:hover img{transform:none}
}

/* ---------- print ---------- */
@media print{
  body{background:#fff;color:#000}
  .site-header,.lightbox,.cta,.lang{display:none!important}
}

/* Downloadable brochure list. Rows are links, so the whole line is the hit area;
   the metadata sits right-aligned and never wraps on desktop. */
.doclist{display:grid;gap:1px;background:var(--line);border:1px solid var(--line)}
.doclist a{display:flex;align-items:baseline;justify-content:space-between;gap:18px;
  padding:17px 20px;background:var(--ink-1);color:var(--fg);text-decoration:none;transition:background .18s}
.doclist a:hover{background:var(--ink-2)}
.doc-name{font-family:var(--ff-display);font-size:1.02rem;font-weight:600}
.doc-meta{font-family:var(--ff-mono);font-size:.72rem;letter-spacing:.06em;color:var(--fg-3);white-space:nowrap}
@media (max-width:620px){
  .doclist a{flex-direction:column;align-items:flex-start;gap:4px}
}