/* ==========================================================================
   XiTAN 先碳 — Corporate site stylesheet
   Palette: logo red + champagne gold on warm paper
   ========================================================================== */

:root{
  --red:#C8102E;
  --red-deep:#9C0A22;
  --red-soft:#E8354C;
  --gold:#B0864A;
  --gold-light:#D9BC86;
  --ink:#111110;
  --ink-2:#22221E;
  --gray:#6C6C64;
  --gray-2:#9A9A92;
  --line:rgba(17,17,16,.12);
  --line-soft:rgba(17,17,16,.07);
  --paper:#FAF9F6;
  --paper-2:#F2EFE8;
  --paper-3:#E9E4DA;
  --white:#fff;

  --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --font-num:"Helvetica Neue",Helvetica,Arial,"PingFang SC",sans-serif;

  --nav-h:76px;
  --pad:clamp(20px,4.2vw,64px);
  --maxw:1440px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --ease-out:cubic-bezier(.16,1,.3,1);
}

*,*::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-family:var(--font);font-size:16px;line-height:1.7;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit;border:0;background:none;cursor:pointer;color:inherit}
h1,h2,h3,h4,p,figure,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
::selection{background:var(--red);color:#fff}

/* ---------- layout helpers ---------- */
.wrap{width:100%;max-width:var(--maxw);margin:0 auto;padding-inline:var(--pad)}
.wrap--wide{max-width:1680px}
.section{padding-block:clamp(64px,7vw,120px)}
.section--tight{padding-block:clamp(48px,5vw,80px)}
.bg-paper{background:var(--paper)}
.bg-paper2{background:var(--paper-2)}
.bg-ink{background:var(--ink);color:#F4F2EC}
.bg-ink h1,.bg-ink h2,.bg-ink h3,.bg-ink h4{color:#F7F5EF}

/* ---------- type ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:12px;letter-spacing:.22em;text-transform:uppercase;
  font-weight:600;color:var(--red);margin-bottom:22px;
}
.eyebrow::before{content:"";width:26px;height:1px;background:currentColor;display:block}
.bg-ink .eyebrow{color:var(--gold-light)}

.h-xl{font-size:clamp(34px,4.4vw,62px);line-height:1.14;font-weight:600;letter-spacing:-.02em}
.h-lg{font-size:clamp(30px,3.4vw,48px);line-height:1.18;font-weight:600;letter-spacing:-.018em}
.h-md{font-size:clamp(22px,2vw,30px);line-height:1.32;font-weight:600;letter-spacing:-.01em}
.h-sm{font-size:clamp(18px,1.4vw,21px);line-height:1.42;font-weight:600}
.lead{font-size:clamp(15px,1.1vw,17px);line-height:1.85;color:var(--gray);font-weight:400}
.bg-ink .lead{color:rgba(244,242,236,.68)}
.gold{color:var(--gold)}
.serif-num{font-family:var(--font-num);font-variant-numeric:tabular-nums}

/* section head: title left / text right */
.sec-head{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,.85fr);gap:clamp(24px,4vw,80px);align-items:end;margin-bottom:clamp(36px,4vw,64px)}
.sec-head .lead{max-width:46ch}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  height:48px;padding:0 26px;border-radius:2px;
  font-size:14px;font-weight:600;letter-spacing:.04em;
  background:var(--red);color:#fff;
  transition:background .3s var(--ease),transform .3s var(--ease),box-shadow .3s var(--ease);
}
.btn:hover{background:var(--red-deep);transform:translateY(-2px);box-shadow:0 10px 24px -12px rgba(200,16,46,.7)}
.btn svg{width:15px;height:15px;transition:transform .3s var(--ease)}
.btn:hover svg{transform:translateX(4px)}
.btn--ghost{background:transparent;color:var(--ink);box-shadow:inset 0 0 0 1px var(--line)}
.btn--ghost:hover{background:var(--ink);color:#fff;box-shadow:none}
.btn--light{background:transparent;color:#fff;box-shadow:inset 0 0 0 1px rgba(255,255,255,.45)}
.btn--light:hover{background:#fff;color:var(--ink);box-shadow:none}
.btn--solid-light{background:#fff;color:var(--ink)}
.btn--solid-light:hover{background:var(--red);color:#fff}

/* text link with arrow */
.tlink{
  display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;
  color:var(--ink);padding-bottom:3px;border-bottom:1px solid var(--line);
  transition:color .25s,border-color .25s;
}
.tlink svg{width:13px;height:13px;transition:transform .3s var(--ease)}
.tlink:hover{color:var(--red);border-color:var(--red)}
.tlink:hover svg{transform:translateX(4px)}
.bg-ink .tlink{color:#F4F2EC;border-color:rgba(255,255,255,.28)}
.bg-ink .tlink:hover{color:var(--gold-light);border-color:var(--gold-light)}

/* ==========================================================================
   HEADER
   ========================================================================== */
.site-header{
  position:fixed;inset:0 0 auto 0;z-index:900;
  height:var(--nav-h);
  display:flex;align-items:center;
  background:transparent;
  transition:background .45s var(--ease),box-shadow .45s var(--ease),height .35s var(--ease);
}
.site-header::after{
  content:"";position:absolute;inset:auto 0 0 0;height:1px;
  background:rgba(255,255,255,.16);opacity:1;transition:opacity .4s;
}
.site-header.is-solid{background:rgba(250,249,246,.975);backdrop-filter:saturate(180%) blur(14px);box-shadow:0 1px 0 rgba(17,17,16,.06)}
.site-header.is-solid::after{opacity:0}
.site-header.is-solid .nav-link,.site-header.is-solid .brand-sub{color:var(--ink)}
.site-header.is-solid .brand-sub{opacity:.55}
.site-header.is-solid .util-btn{color:var(--ink);border-color:var(--line)}
.site-header.is-solid .burger span{background:var(--ink)}

.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;width:100%}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0;padding-block:6px}
.brand img{height:38px;width:auto}
.brand-txt{display:none}

.nav{display:flex;align-items:center;gap:clamp(10px,1.6vw,30px);height:100%}
.nav-item{height:100%;display:flex;align-items:center;position:static}
.nav-link{
  display:inline-flex;align-items:center;gap:5px;height:100%;
  font-size:15px;font-weight:500;letter-spacing:.02em;color:rgba(255,255,255,.94);
  position:relative;transition:color .25s;
}
.nav-link::after{
  content:"";position:absolute;left:50%;bottom:26px;transform:translateX(-50%);
  width:0;height:2px;background:var(--red);transition:width .32s var(--ease);
}
.nav-item:hover .nav-link::after,.nav-item.is-active .nav-link::after{width:18px}
.nav-item:hover .nav-link{color:#fff}
.site-header.is-solid .nav-item:hover .nav-link{color:var(--red)}
.nav-link .chev{width:9px;height:9px;opacity:.6;transition:transform .3s}

/* mega menu */
.mega{
  position:fixed;left:0;right:0;top:var(--nav-h);
  background:rgba(250,249,246,.985);backdrop-filter:blur(18px);
  border-top:1px solid var(--line-soft);
  box-shadow:0 26px 50px -30px rgba(0,0,0,.35);
  opacity:0;visibility:hidden;transform:translateY(-10px);
  transition:opacity .3s var(--ease),transform .38s var(--ease-out),visibility .3s;
  padding-block:40px 46px;
}
.nav-item:hover .mega,.nav-item:focus-within .mega{opacity:1;visibility:visible;transform:translateY(0)}
.mega-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:clamp(24px,3vw,56px)}
.mega-col h5{
  font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--gray-2);
  font-weight:700;margin:0 0 16px;padding-bottom:12px;border-bottom:1px solid var(--line-soft);
}
.mega-col li+li{margin-top:2px}
.mega-col a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  font-size:14px;color:var(--ink-2);padding:7px 0;transition:color .2s,transform .25s var(--ease);
}
.mega-col a span.arw{opacity:0;transform:translateX(-4px);transition:.25s;color:var(--red);font-size:15px}
.mega-col a:hover{color:var(--red);transform:translateX(3px)}
.mega-col a:hover span.arw{opacity:1;transform:translateX(0)}
.mega-feature{display:flex;flex-direction:column;gap:14px}
.mega-feature img{width:100%;height:150px;object-fit:cover;filter:saturate(1.02)}
.mega-feature p{font-size:13px;line-height:1.7;color:var(--gray)}

/* header utils */
.header-utils{display:flex;align-items:center;gap:12px;flex-shrink:0}
.util-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:7px;
  height:34px;padding:0 12px;border:1px solid rgba(255,255,255,.34);border-radius:2px;
  font-size:12px;letter-spacing:.08em;color:#fff;transition:.25s;
}
.util-btn:hover{background:rgba(255,255,255,.14)}
.util-btn svg{width:14px;height:14px}
.burger{display:none;width:38px;height:38px;position:relative;flex-direction:column;justify-content:center;gap:5px;align-items:flex-end}
.burger span{display:block;height:2px;width:24px;background:#fff;transition:.3s var(--ease)}
.burger span:nth-child(2){width:17px}

/* ==========================================================================
   HERO
   ========================================================================== */
.hero{position:relative;height:100svh;min-height:620px;max-height:1000px;overflow:hidden;background:#0d0e0c}
.hero-slides{position:absolute;inset:0}
.hero-slide{
  position:absolute;inset:0;opacity:0;transition:opacity 1.1s var(--ease);
  will-change:opacity;
}
.hero-slide.is-on{opacity:1}
.hero-slide .ph{
  position:absolute;inset:0;background-size:cover;background-position:center;
  transform:scale(1.06);transition:transform 7s linear;
}
.hero-slide.is-on .ph{transform:scale(1)}
.hero-slide::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(94deg,rgba(8,9,7,.84) 0%,rgba(8,9,7,.6) 34%,rgba(8,9,7,.18) 62%,rgba(8,9,7,.42) 100%);
}
.hero-inner{position:relative;z-index:3;height:100%;display:flex;flex-direction:column;justify-content:center;padding-top:var(--nav-h)}
.hero-copy{max-width:min(760px,78%)}
.hero-copy .eyebrow{color:var(--gold-light)}
.hero-copy .eyebrow::before{background:var(--gold-light)}
.hero-title{
  color:#fff;font-size:clamp(38px,5.4vw,78px);line-height:1.08;font-weight:600;
  letter-spacing:-.025em;margin-bottom:26px;
}
.hero-title em{font-style:normal;color:var(--gold-light);display:inline-block}
.hero-desc{color:rgba(255,255,255,.8);font-size:clamp(14px,1.15vw,17px);line-height:1.85;max-width:44ch;margin-bottom:38px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.hero-slide .hero-copy>*{opacity:0;transform:translateY(26px)}
.hero-slide.is-on .hero-copy>*{animation:heroUp .95s var(--ease-out) forwards}
.hero-slide.is-on .hero-copy>*:nth-child(2){animation-delay:.12s}
.hero-slide.is-on .hero-copy>*:nth-child(3){animation-delay:.24s}
.hero-slide.is-on .hero-copy>*:nth-child(4){animation-delay:.36s}
@keyframes heroUp{to{opacity:1;transform:none}}

/* hero bottom bar */
.hero-foot{
  position:absolute;left:0;right:0;bottom:0;z-index:4;
  padding-bottom:clamp(100px,12vh,140px);
}
.hero-foot-in{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;padding-bottom:24px}
.hero-dots{display:flex;gap:26px}
.hero-dot{
  display:flex;flex-direction:column;gap:9px;min-width:86px;text-align:left;
  color:rgba(255,255,255,.5);font-size:12px;letter-spacing:.06em;transition:color .3s;
}
.hero-dot b{font-weight:600;font-size:13px;letter-spacing:.04em}
.hero-dot .bar{height:2px;background:rgba(255,255,255,.24);position:relative;overflow:hidden}
.hero-dot .bar i{position:absolute;inset:0;width:0;background:#fff;display:block}
.hero-dot.is-on{color:#fff}
.hero-dot.is-on .bar i{width:100%;transition:width 7s linear}
.hero-scroll{display:flex;align-items:center;gap:10px;color:rgba(255,255,255,.62);font-size:11px;letter-spacing:.2em;text-transform:uppercase}
.hero-scroll .ln{width:1px;height:34px;background:linear-gradient(to bottom,rgba(255,255,255,.6),transparent);animation:sc 2.2s infinite}
@keyframes sc{0%,100%{opacity:.3;transform:scaleY(.5)}50%{opacity:1;transform:scaleY(1)}}

/* ==========================================================================
   FLOATING PRODUCT CARDS (overlaps hero)
   ========================================================================== */
.float-cards{position:relative;z-index:20;margin-top:-92px}
.float-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0;background:var(--white);box-shadow:0 24px 60px -34px rgba(0,0,0,.45)}
.fcard{
  padding:clamp(26px,2.4vw,38px);border-right:1px solid var(--line-soft);
  display:flex;flex-direction:column;gap:12px;position:relative;overflow:hidden;
  transition:background .4s var(--ease);
}
.fcard:last-child{border-right:0}
.fcard::before{
  content:"";position:absolute;left:0;top:0;height:2px;width:0;background:var(--red);
  transition:width .5s var(--ease);
}
.fcard:hover::before{width:100%}
.fcard:hover{background:#FBFAF7}
.fcard .tag{font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--gold);font-weight:700}
.fcard h3{font-size:clamp(19px,1.5vw,23px);line-height:1.4;font-weight:600;letter-spacing:-.01em}
.fcard p{font-size:13.5px;line-height:1.75;color:var(--gray)}
.fcard .tlink{margin-top:auto;align-self:flex-start;font-size:13px}
.fcard .idx{position:absolute;right:22px;top:22px;font-family:var(--font-num);font-size:12px;color:var(--paper-3);letter-spacing:.1em}

/* ==========================================================================
   VALUE CHAIN
   ========================================================================== */
.chain{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(20px,2.4vw,34px)}
.chain-card{position:relative;display:flex;flex-direction:column}
.chain-media{position:relative;overflow:hidden;aspect-ratio:4/3;background:var(--paper-3)}
.chain-media img{width:100%;height:100%;object-fit:cover;transition:transform 1s var(--ease)}
.chain-card:hover .chain-media img{transform:scale(1.055)}
.chain-media::after{content:"";position:absolute;inset:0;background:linear-gradient(to top,rgba(10,10,8,.55),transparent 52%)}
.chain-num{
  position:absolute;left:20px;bottom:16px;z-index:2;color:#fff;
  font-family:var(--font-num);font-size:12px;letter-spacing:.16em;display:flex;align-items:center;gap:8px;
}
.chain-num::before{content:"";width:16px;height:1px;background:var(--gold-light)}
.chain-body{padding-top:24px}
.chain-body h3{font-size:clamp(20px,1.6vw,25px);margin-bottom:12px;letter-spacing:-.01em}
.chain-body p{font-size:14px;line-height:1.8;color:var(--gray);margin-bottom:18px}

/* ==========================================================================
   INNOVATION
   ========================================================================== */
.innov{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:clamp(32px,5vw,90px);align-items:center}
.innov-media{position:relative}
.innov-media img{width:100%;aspect-ratio:5/4;object-fit:cover}
.innov-media .badge{
  position:absolute;right:-1px;bottom:-1px;background:var(--red);color:#fff;
  padding:22px 26px;display:flex;flex-direction:column;gap:2px;
}
.innov-media .badge b{font-size:clamp(26px,2.4vw,36px);font-family:var(--font-num);line-height:1;letter-spacing:-.02em}
.innov-media .badge span{font-size:11px;letter-spacing:.14em;opacity:.85}

.stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;border-top:1px solid var(--line);margin-top:clamp(44px,5vw,76px)}
.stat{padding:30px 26px 6px 0;border-right:1px solid var(--line-soft)}
.stat:last-child{border-right:0}
.stat .num{font-family:var(--font-num);font-size:clamp(30px,3.1vw,46px);line-height:1;letter-spacing:-.03em;font-weight:500;display:flex;align-items:baseline;gap:3px}
.stat .num small{font-size:14px;font-weight:500;letter-spacing:0;margin-left:2px;color:var(--gray)}
.stat .num .unit{font-size:15px;color:var(--ink);margin-left:4px}
.stat p{font-size:13.5px;color:var(--gray);margin-top:12px;line-height:1.6}

/* ==========================================================================
   SOLUTIONS
   ========================================================================== */
.sol-head{display:flex;justify-content:space-between;align-items:flex-end;gap:32px;margin-bottom:clamp(30px,3.4vw,52px);flex-wrap:wrap}
.sol-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:2px;background:var(--line-soft)}
.sol-card{
  position:relative;overflow:hidden;aspect-ratio:3/4;background:#111;display:block;
}
.sol-card img{width:100%;height:100%;object-fit:cover;transition:transform 1.1s var(--ease);opacity:.92}
.sol-card::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(to top,rgba(8,9,7,.86) 0%,rgba(8,9,7,.28) 46%,rgba(8,9,7,.06) 74%);
  transition:opacity .4s;
}
.sol-card:hover img{transform:scale(1.07);opacity:1}
.sol-in{position:absolute;inset:auto 0 0 0;padding:clamp(20px,2vw,30px);z-index:2;color:#fff}
.sol-in .k{font-size:11px;letter-spacing:.18em;color:var(--gold-light);text-transform:uppercase;margin-bottom:10px;display:block}
.sol-in h3{font-size:clamp(19px,1.6vw,24px);margin-bottom:8px;letter-spacing:-.01em}
.sol-in p{font-size:13px;line-height:1.7;color:rgba(255,255,255,.72);max-height:0;opacity:0;overflow:hidden;transition:max-height .45s var(--ease),opacity .35s,margin .4s}
.sol-card:hover .sol-in p{max-height:80px;opacity:1;margin-top:4px}
.sol-in .arw{
  position:absolute;right:clamp(20px,2vw,30px);bottom:clamp(20px,2vw,30px);
  width:34px;height:34px;border:1px solid rgba(255,255,255,.4);border-radius:50%;
  display:grid;place-items:center;transition:.35s var(--ease);
}
.sol-card:hover .arw{background:var(--red);border-color:var(--red);transform:rotate(-45deg)}

/* ==========================================================================
   NEWS
   ========================================================================== */
.news-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(22px,2.6vw,40px)}
.news-card{display:flex;flex-direction:column}
.news-media{overflow:hidden;aspect-ratio:16/10;background:var(--paper-3);margin-bottom:20px}
.news-media img{width:100%;height:100%;object-fit:cover;transition:transform .9s var(--ease)}
.news-card:hover .news-media img{transform:scale(1.05)}
.news-meta{display:flex;align-items:center;gap:12px;font-size:12px;color:var(--gray-2);letter-spacing:.04em;margin-bottom:12px}
.news-meta .cat{color:var(--red);font-weight:600}
.news-meta .dot{width:3px;height:3px;background:var(--gray-2);border-radius:50%}
.news-card h3{font-size:clamp(17px,1.3vw,19.5px);line-height:1.55;font-weight:600;margin-bottom:12px;transition:color .25s}
.news-card:hover h3{color:var(--red)}
.news-card p{font-size:13.5px;line-height:1.78;color:var(--gray);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}

/* ==========================================================================
   ESG BANNER
   ========================================================================== */
.esg{position:relative;overflow:hidden;background:#0F100D;color:#fff}
.esg-bg{position:absolute;inset:0}
.esg-bg img{width:100%;height:100%;object-fit:cover;object-position:70% center;opacity:.58}
.esg::after{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(8,9,7,.92) 0%,rgba(8,9,7,.7) 42%,rgba(8,9,7,.25) 78%,rgba(8,9,7,.4) 100%)}
.esg-in{position:relative;z-index:2;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,.7fr);gap:clamp(30px,5vw,80px);align-items:center;padding-block:clamp(72px,8vw,130px)}
.esg-kpis{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1px;background:rgba(255,255,255,.16)}
.esg-kpi{background:rgba(10,11,9,.55);backdrop-filter:blur(6px);padding:26px 24px}
.esg-kpi b{display:block;font-family:var(--font-num);font-size:clamp(26px,2.6vw,38px);line-height:1;letter-spacing:-.02em;color:var(--gold-light)}
.esg-kpi span{display:block;font-size:12.5px;margin-top:10px;color:rgba(255,255,255,.7);line-height:1.6}

/* ==========================================================================
   GLOBAL / CTA STRIP
   ========================================================================== */
.cta-strip{display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta-strip h2{max-width:20ch;text-wrap:balance}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer{background:#0C0D0B;color:rgba(255,255,255,.66);padding-top:clamp(56px,6vw,88px)}
.foot-top{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,2.6fr);gap:clamp(36px,5vw,80px);padding-bottom:clamp(44px,5vw,68px);border-bottom:1px solid rgba(255,255,255,.1)}
.foot-brand img{height:38px;margin-bottom:20px}
.foot-brand p{font-size:13.5px;line-height:1.85;max-width:30ch;color:rgba(255,255,255,.55)}
.foot-contact{margin-top:24px;display:flex;flex-direction:column;gap:10px;font-size:13.5px}
.foot-contact a{display:inline-flex;gap:9px;align-items:center;color:rgba(255,255,255,.8);transition:color .2s}
.foot-contact a:hover{color:var(--gold-light)}
.foot-contact svg{width:15px;height:15px;flex-shrink:0;opacity:.6}
.foot-cols{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:clamp(16px,2vw,30px)}
.foot-col h5{font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:#fff;font-weight:600;margin:0 0 18px}
.foot-col li+li{margin-top:9px}
.foot-col a{font-size:13px;color:rgba(255,255,255,.58);transition:color .2s}
.foot-col a:hover{color:var(--gold-light)}
.foot-bottom{display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap;padding-block:26px;font-size:12.5px;color:rgba(255,255,255,.42)}
.foot-legal{display:flex;gap:20px;flex-wrap:wrap}
.foot-legal a:hover{color:rgba(255,255,255,.8)}
.foot-social{display:flex;gap:10px}
.foot-social a{width:34px;height:34px;border:1px solid rgba(255,255,255,.16);display:grid;place-items:center;transition:.25s}
.foot-social a:hover{border-color:var(--gold-light);color:var(--gold-light)}
.foot-social svg{width:15px;height:15px}

/* ==========================================================================
   SUBPAGE
   ========================================================================== */
.page-hero{position:relative;min-height:clamp(340px,42vh,460px);display:flex;align-items:flex-end;background:#101110;overflow:hidden;padding-top:var(--nav-h)}
.page-hero .bg{position:absolute;inset:0}
.page-hero .bg img{width:100%;height:100%;object-fit:cover;opacity:.62}
.page-hero::after{content:"";position:absolute;inset:0;background:linear-gradient(to top,rgba(8,9,7,.94) 0%,rgba(8,9,7,.78) 38%,rgba(8,9,7,.5) 72%,rgba(8,9,7,.62) 100%)}
.page-hero .wrap{position:relative;z-index:2;padding-bottom:clamp(32px,4vw,54px);color:#fff}
.page-hero h1{font-size:clamp(32px,3.6vw,54px);line-height:1.14;letter-spacing:-.02em;margin-bottom:16px;color:#fff}
.page-hero p{font-size:15px;line-height:1.85;color:rgba(255,255,255,.75);max-width:62ch}
.crumb{display:flex;gap:10px;align-items:center;font-size:12px;letter-spacing:.06em;color:rgba(255,255,255,.55);margin-bottom:18px}
.crumb a:hover{color:#fff}
.crumb span.sep{opacity:.4}

.page-nav{border-bottom:1px solid var(--line);background:var(--paper);position:sticky;top:var(--nav-h);z-index:300}
.page-nav ul{display:flex;gap:clamp(18px,2.4vw,42px);overflow-x:auto;scrollbar-width:none}
.page-nav ul::-webkit-scrollbar{display:none}
.page-nav a{
  display:block;padding:20px 0;font-size:14px;color:var(--gray);white-space:nowrap;
  border-bottom:2px solid transparent;transition:.25s;margin-bottom:-1px;
}
.page-nav a:hover{color:var(--ink)}
.page-nav a.is-on{color:var(--ink);border-color:var(--red);font-weight:600}

.prose{max-width:74ch}
.prose h2{font-size:clamp(24px,2.2vw,32px);margin:0 0 18px;letter-spacing:-.015em}
.prose h3{font-size:19px;margin:36px 0 12px}
.prose p{margin-bottom:18px;color:var(--gray);line-height:1.95}
.prose strong{color:var(--ink);font-weight:600}

/* product grid */
.p-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:2px;background:var(--line-soft)}
.p-card{background:var(--white);padding:0;display:flex;flex-direction:column;transition:background .3s}
.p-card:hover{background:#FCFBF8}
.p-card .p-media{aspect-ratio:4/3;overflow:hidden;background:var(--paper-2)}
.p-card .p-media img{width:100%;height:100%;object-fit:cover;transition:transform .9s var(--ease)}
.p-card:hover .p-media img{transform:scale(1.05)}
.p-card .p-body{padding:26px 28px 30px;display:flex;flex-direction:column;gap:10px;flex:1}
.p-card .p-tag{font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--gold);font-weight:700}
.p-card h3{font-size:20px;letter-spacing:-.01em}
.p-card p{font-size:13.5px;line-height:1.75;color:var(--gray);flex:1}
.p-card .tlink{font-size:13px;align-self:flex-start;margin-top:6px}
.spec-row{display:flex;gap:24px;padding-top:14px;border-top:1px solid var(--line-soft);margin-top:6px}
.spec-row div{font-size:12px;color:var(--gray-2)}
.spec-row b{display:block;font-family:var(--font-num);font-size:18px;color:var(--ink);letter-spacing:-.01em;margin-bottom:2px}

/* article list */
.a-list{border-top:1px solid var(--line)}
.a-item{
  display:grid;grid-template-columns:150px minmax(0,1fr) auto;gap:clamp(18px,2.4vw,40px);
  padding:28px 0;border-bottom:1px solid var(--line-soft);align-items:start;
  transition:background .3s;
}
.a-item:hover{background:rgba(18,18,15,.018)}
.a-date{font-family:var(--font-num);font-size:13px;color:var(--gray-2);letter-spacing:.03em;padding-top:3px}
.a-item h3{font-size:clamp(17px,1.4vw,20px);line-height:1.55;margin-bottom:8px;transition:color .25s}
.a-item:hover h3{color:var(--red)}
.a-item p{font-size:13.5px;line-height:1.75;color:var(--gray);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.a-tag{font-size:11.5px;color:var(--red);border:1px solid rgba(200,16,46,.24);padding:4px 10px;white-space:nowrap;letter-spacing:.04em;height:fit-content}

/* timeline */
.timeline{border-left:1px solid var(--line);padding-left:clamp(20px,3vw,40px);margin-top:10px}
.tl-item{position:relative;padding-bottom:clamp(30px,3.4vw,48px)}
.tl-item::before{
  content:"";position:absolute;left:calc(-1 * clamp(20px,3vw,40px) - 4px);top:8px;
  width:7px;height:7px;background:var(--red);border-radius:50%;
}
.tl-year{font-family:var(--font-num);font-size:clamp(22px,2vw,28px);color:var(--red);letter-spacing:-.01em;margin-bottom:8px;font-weight:500}
.tl-item h4{font-size:17px;margin-bottom:6px}
.tl-item p{font-size:14px;color:var(--gray);line-height:1.8;max-width:70ch}

/* contact / form */
.c-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,.82fr);gap:clamp(32px,5vw,80px);align-items:start}
.field{margin-bottom:20px}
.field label{display:block;font-size:12.5px;letter-spacing:.06em;color:var(--gray);margin-bottom:8px}
.field input,.field textarea,.field select{
  width:100%;border:1px solid var(--line);background:var(--white);
  padding:13px 15px;font-family:inherit;font-size:14px;color:var(--ink);
  border-radius:2px;transition:border-color .25s,box-shadow .25s;
}
.field input:focus,.field textarea:focus,.field select:focus{
  outline:none;border-color:var(--red);box-shadow:0 0 0 3px rgba(200,16,46,.08);
}
.field textarea{min-height:130px;resize:vertical}
.info-list{display:flex;flex-direction:column;gap:26px}
.info-item{border-top:1px solid var(--line);padding-top:18px}
.info-item dt{font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--gold);font-weight:700;margin-bottom:8px}
.info-item dd{margin:0;font-size:15px;line-height:1.8}
.info-item dd span{display:block;color:var(--gray);font-size:13.5px}

/* reveal animation — 仅在 JS 可用时隐藏初始态，无 JS 时内容直接可见 */
html.js [data-reveal]{opacity:0;transform:translateY(26px);transition:opacity .9s var(--ease-out),transform .9s var(--ease-out)}
html.js [data-reveal].in{opacity:1;transform:none}
html.js [data-reveal][data-d="1"]{transition-delay:.09s}
html.js [data-reveal][data-d="2"]{transition-delay:.18s}
html.js [data-reveal][data-d="3"]{transition-delay:.27s}
html.js [data-reveal][data-d="4"]{transition-delay:.36s}

/* back to top */
.to-top{
  position:fixed;right:26px;bottom:26px;z-index:800;width:44px;height:44px;
  background:var(--ink);color:#fff;display:grid;place-items:center;
  opacity:0;visibility:hidden;transform:translateY(10px);transition:.35s var(--ease);
}
.to-top.on{opacity:1;visibility:visible;transform:none}
.to-top:hover{background:var(--red)}
.to-top svg{width:16px;height:16px}

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */
@media (max-width:1180px){
  .foot-cols{grid-template-columns:repeat(3,minmax(0,1fr));gap:28px 20px}
  .foot-top{grid-template-columns:1fr}
  .mega-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
}
@media (max-width:1024px){
  :root{--nav-h:64px}
  .nav{display:none}
  .burger{display:flex}
  .header-utils .util-btn{display:none}
  .hero-copy{max-width:100%}
  .float-grid{grid-template-columns:1fr;box-shadow:0 20px 40px -30px rgba(0,0,0,.4)}
  .fcard{border-right:0;border-bottom:1px solid var(--line-soft)}
  .fcard:last-child{border-bottom:0}
  .chain{grid-template-columns:1fr;gap:36px}
  .innov{grid-template-columns:1fr}
  .innov-media img{aspect-ratio:16/10}
  .stats{grid-template-columns:repeat(2,1fr)}
  .stat{border-bottom:1px solid var(--line-soft);padding-bottom:24px}
  .stat:nth-child(2n){border-right:0}
  .sol-grid{grid-template-columns:repeat(2,1fr)}
  .sol-card{aspect-ratio:4/5}
  .news-grid{grid-template-columns:1fr;gap:34px}
  .esg-in{grid-template-columns:1fr}
  .sec-head{grid-template-columns:1fr;gap:20px}
  .p-grid{grid-template-columns:repeat(2,1fr)}
  .c-grid{grid-template-columns:1fr}
  .a-item{grid-template-columns:1fr;gap:10px}
  .a-date{padding-top:0}
}
@media (max-width:680px){
  .hero{min-height:600px;height:100svh}
  .hero-inner{padding-top:calc(var(--nav-h) + 24px);padding-bottom:150px;justify-content:center}
  .hero-copy{max-width:100%}
  .hero-title{font-size:clamp(30px,8.4vw,44px);margin-bottom:18px}
  .hero-desc{font-size:14px;line-height:1.75;margin-bottom:26px}
  .hero-foot-in{flex-direction:column;align-items:stretch;gap:0}
  .hero-dots{width:100%;gap:10px}
  .hero-dot{min-width:0;flex:1 1 0;gap:7px;font-size:11px}
  .hero-dot span{display:none}
  .hero-dot b{font-size:11.5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .hero-foot{padding-bottom:88px}
  .hero-foot-in{padding-bottom:0}
  .hero-scroll{display:none}
  .hero-cta{gap:10px}
  .hero-cta .btn{height:44px;padding:0 18px;font-size:13px}
  .float-cards{margin-top:-60px}
  .sol-grid{grid-template-columns:1fr}
  .sol-card{aspect-ratio:16/11}
  .stats{grid-template-columns:1fr 1fr}
  .p-grid{grid-template-columns:1fr}
  .esg-kpis{grid-template-columns:1fr 1fr}
  .foot-cols{grid-template-columns:1fr 1fr}
  .foot-bottom{flex-direction:column;align-items:flex-start}
  .brand img{height:28px}
}

/* mobile drawer */
.drawer{
  position:fixed;inset:0;z-index:950;background:var(--paper);
  transform:translateX(100%);transition:transform .45s var(--ease-out);
  display:flex;flex-direction:column;overflow-y:auto;
}
.drawer.on{transform:none}
.drawer-top{display:flex;align-items:center;justify-content:space-between;padding:0 var(--pad);height:64px;border-bottom:1px solid var(--line);position:sticky;top:0;background:var(--paper);z-index:2}
.drawer-close{width:34px;height:34px;display:grid;place-items:center;font-size:22px;line-height:1}
.drawer-body{padding:8px var(--pad) 40px}
.dr-item{border-bottom:1px solid var(--line-soft)}
.dr-link{display:flex;align-items:center;justify-content:space-between;padding:16px 0;font-size:16px;font-weight:500}
.dr-link .pl{font-size:18px;color:var(--gray-2);transition:transform .3s}
.dr-item.open .dr-link .pl{transform:rotate(45deg);color:var(--red)}
.dr-sub{max-height:0;overflow:hidden;transition:max-height .4s var(--ease)}
.dr-item.open .dr-sub{max-height:600px}
.dr-sub a{display:block;padding:9px 0 9px 14px;font-size:14px;color:var(--gray);border-left:1px solid var(--line)}
.dr-sub a:hover{color:var(--red);border-color:var(--red)}
.dr-foot{margin-top:26px;display:flex;flex-direction:column;gap:12px}
.dr-foot .btn{width:100%;justify-content:center}

/* ==========================================================================
   EXTRA COMPONENTS (inner pages)
   ========================================================================== */
.innov--rev .innov-media{order:2}

/* spec table */
.table-wrap{overflow-x:auto;border:1px solid var(--line-soft);background:var(--white)}
table.spec{width:100%;border-collapse:collapse;min-width:640px;font-size:13.5px}
table.spec th,table.spec td{padding:15px 18px;text-align:left;border-bottom:1px solid var(--line-soft)}
table.spec thead th{
  background:var(--paper-2);font-size:12px;letter-spacing:.1em;text-transform:uppercase;
  color:var(--gray);font-weight:700;white-space:nowrap;
}
table.spec tbody tr:hover{background:rgba(200,16,46,.025)}
table.spec td:first-child{font-weight:600;color:var(--ink)}
table.spec td{color:var(--gray)}
table.spec tr:last-child td{border-bottom:0}

/* culture cards */
.culture-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:2px;background:var(--line-soft)}
.culture-card{background:var(--white);padding:clamp(26px,2.6vw,38px);min-height:230px;display:flex;flex-direction:column;gap:14px;transition:background .35s}
.culture-card:hover{background:#FBFAF7}
.culture-card .cn{font-family:var(--font-num);font-size:12px;color:var(--gold);letter-spacing:.16em}
.culture-card h4{font-size:20px;letter-spacing:-.01em}
.culture-card p{font-size:13.5px;line-height:1.8;color:var(--gray)}
.culture-card .mark{width:34px;height:2px;background:var(--red);margin-top:auto}

/* download list */
.dl-list{border-top:1px solid var(--line)}
.dl-item{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 0;border-bottom:1px solid var(--line-soft);transition:.25s;
}
.dl-item:hover{background:rgba(200,16,46,.025)}
.dl-item .t{display:flex;flex-direction:column;gap:4px}
.dl-item h4{font-size:16px;margin:0}
.dl-item span{font-size:12.5px;color:var(--gray-2)}
.dl-item .ico{
  width:36px;height:36px;border:1px solid var(--line);display:grid;place-items:center;
  flex-shrink:0;transition:.25s;
}
.dl-item:hover .ico{background:var(--red);border-color:var(--red);color:#fff}
.dl-item .ico svg{width:15px;height:15px}

/* map placeholder */
.map-box{
  position:relative;aspect-ratio:16/9;background:var(--paper-3);overflow:hidden;
  display:grid;place-items:center;border:1px solid var(--line-soft);
}
.map-box .grid-lines{
  position:absolute;inset:0;
  background-image:linear-gradient(var(--line-soft) 1px,transparent 1px),linear-gradient(90deg,var(--line-soft) 1px,transparent 1px);
  background-size:48px 48px;
}
.map-box .pin{
  position:relative;z-index:2;display:flex;flex-direction:column;align-items:center;gap:10px;
  color:var(--red);font-size:13px;
}
.map-box .pin .dot{
  width:14px;height:14px;background:var(--red);border-radius:50%;
  box-shadow:0 0 0 8px rgba(200,16,46,.12),0 0 0 18px rgba(200,16,46,.06);
}
.map-box .pin b{color:var(--ink);font-size:15px}

/* numbered feature list */
.num-list{counter-reset:n;display:flex;flex-direction:column;gap:0}
.num-list li{
  counter-increment:n;display:grid;grid-template-columns:56px minmax(0,1fr);gap:18px;
  padding:22px 0;border-bottom:1px solid var(--line-soft);
}
.num-list li::before{
  content:counter(n,decimal-leading-zero);font-family:var(--font-num);font-size:13px;
  color:var(--gold);letter-spacing:.08em;padding-top:3px;
}
.num-list h4{font-size:16.5px;margin:0 0 6px}
.num-list p{font-size:13.5px;line-height:1.8;color:var(--gray)}

/* split block */
.split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:clamp(28px,4.4vw,72px);align-items:center}
.split--rev > div:first-child{order:2}
.split .media{overflow:hidden}
.split .media img{width:100%;aspect-ratio:4/3;object-fit:cover}

/* quote */
.quote{
  border-left:2px solid var(--red);padding:6px 0 6px 26px;margin:0;
  font-size:clamp(18px,1.7vw,23px);line-height:1.7;letter-spacing:-.01em;
}
.quote cite{display:block;margin-top:16px;font-size:13px;font-style:normal;color:var(--gray);letter-spacing:.04em}

/* two-col stat band */
.band{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border-block:1px solid var(--line)}
.band > div{background:var(--paper);padding:clamp(24px,3vw,40px)}
.band b{display:block;font-family:var(--font-num);font-size:clamp(28px,3vw,40px);letter-spacing:-.02em;line-height:1;margin-bottom:10px}
.band span{font-size:13px;color:var(--gray);line-height:1.6}

@media (max-width:1024px){
  .culture-grid{grid-template-columns:1fr 1fr}
  .split{grid-template-columns:1fr}
  .split--rev > div:first-child{order:0}
  .band{grid-template-columns:1fr}
  .innov--rev .innov-media{order:0}
}
@media (max-width:680px){
  .culture-grid{grid-template-columns:1fr}
  .dl-item h4{font-size:14.5px}
}

/* anchor offset for sticky page-nav */
section[id]{scroll-margin-top:calc(var(--nav-h) + 58px)}