:root{
  --paper:#F7F6F2;
  --studio:#C8C8C8;        /* 与产品实拍背景一致 */
  --ink:#101214;
  --ink-2:#4A4F55;
  --ink-3:#8A8F94;
  --copper:#9C4A2F;
  --line:#DEDAD0;
  --sans:"PingFang SC","Microsoft YaHei","Noto Sans SC","Hiragino Sans GB",system-ui,sans-serif;
  --mono:"SF Mono",ui-monospace,"Cascadia Mono",Consolas,monospace;
}
*{-webkit-font-smoothing:antialiased}
html{scroll-behavior:smooth}
body{background:var(--paper);color:var(--ink);font-family:var(--sans);overflow-x:hidden}
::selection{background:var(--copper);color:#fff}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{margin:0;font-weight:500;letter-spacing:-.03em;text-wrap:pretty}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
.wrap{max-width:1240px;margin:0 auto;padding:0 32px}
@media(max-width:575.98px){.wrap{padding:0 20px}}
.kicker{font-family:var(--mono);font-size:11px;letter-spacing:.22em;color:var(--ink-3);text-transform:uppercase}
.rule{height:1px;background:var(--line)}

/* ---------- 顶栏（V3 结构 / V2 质感） ---------- */
header{position:sticky;top:0;z-index:60;background:rgba(247,246,242,.9);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.bar{height:78px;display:flex;align-items:center;justify-content:space-between;gap:26px}
.logo{display:flex;align-items:center;gap:11px}
.logo .mark{width:24px;height:24px;color:var(--copper);flex:none}
.logo b{font-size:17px;letter-spacing:.12em;font-weight:500;white-space:nowrap;display:block}
.logo i{font-style:normal;font-family:var(--mono);font-size:9px;letter-spacing:.2em;
  color:var(--ink-3);display:block;margin-top:3px;white-space:nowrap}
.nav{display:flex;gap:32px;font-size:14.5px;color:var(--ink-2)}
.nav a{padding:5px 0;border-bottom:1px solid transparent;transition:.2s}
.nav a:hover,.nav a.on{color:var(--ink);border-color:var(--copper)}
.bar-right{display:flex;align-items:center;gap:22px}
.tel{font-family:var(--mono);font-size:14px;letter-spacing:.02em;white-space:nowrap}
.tel small{display:block;font-family:var(--sans);font-size:9.5px;letter-spacing:.14em;color:var(--ink-3);margin-top:2px}
.btn-line{border:1px solid var(--ink);padding:11px 20px;border-radius:2px;font-size:13.5px;
  letter-spacing:.04em;transition:.2s;white-space:nowrap}
.btn-line:hover{background:var(--ink);color:var(--paper)}
@media(max-width:1099.98px){.nav{display:none}.tel{display:none}}
@media(max-width:767.98px){.bar-right .btn-line{display:none}.logo b{font-size:15.5px}}
.burger{display:none;width:44px;height:44px;border:0;background:none;padding:0;
  flex-direction:column;gap:5px;align-items:center;justify-content:center}
.burger span{width:20px;height:1.4px;background:var(--ink);display:block;transition:.22s}
.burger[aria-expanded="true"] span:nth-child(1){transform:translateY(6.4px) rotate(45deg)}
.burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-6.4px) rotate(-45deg)}
@media(max-width:1099.98px){.burger{display:flex}}
.mnav{border-top:1px solid var(--line);background:var(--paper)}
.mnav a{display:flex;justify-content:space-between;padding:16px 32px;
  border-bottom:1px solid var(--line);font-size:15.5px}
.mnav a em{font-family:var(--mono);font-style:normal;font-size:10px;letter-spacing:.16em;color:var(--ink-3)}

/* ---------- Hero：V2 影棚 ---------- */
.hero{background:var(--studio);position:relative;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.06fr .94fr;gap:20px;align-items:center;
  min-height:clamp(540px, calc(100vh - 285px), 780px);padding:44px 0 40px}
@media(max-width:991.98px){.hero-grid{grid-template-columns:1fr;min-height:auto;padding:44px 0 0;gap:0}}
.hero .eyebrow{font-family:var(--mono);font-size:11.5px;letter-spacing:.18em;color:var(--copper);
  margin-bottom:22px;display:flex;align-items:center;gap:10px}
.hero .eyebrow::before{content:"";width:26px;height:1px;background:var(--copper);display:block}
.hero h1{font-size:clamp(38px,5.6vw,80px);line-height:1.06;letter-spacing:-.045em;font-weight:500}
.hero h1 em{font-style:normal;color:var(--copper)}
.hero .desc{margin-top:28px;max-width:36ch;font-size:16.5px;line-height:1.9;color:#2E3236}
.hero .acts{margin-top:38px;display:flex;align-items:center;gap:26px;flex-wrap:wrap}
.btn-solid{background:var(--ink);color:var(--paper);padding:15px 28px;border-radius:2px;
  font-size:14.5px;letter-spacing:.04em;transition:.2s;display:inline-block}
.btn-solid:hover{background:var(--copper);color:#fff}
.hero .lnk{font-family:var(--mono);font-size:12.5px;letter-spacing:.14em;color:#25292D;
  border-bottom:1px solid currentColor;padding-bottom:3px}
.hero .lnk:hover{color:var(--copper);border-color:var(--copper)}
.hero .scroll{position:absolute;left:32px;bottom:26px;display:flex;align-items:center;gap:10px;
  font-family:var(--mono);font-size:10px;letter-spacing:.2em;color:#4A4F55}
.hero .scroll::after{content:"";width:44px;height:1px;background:rgba(16,18,20,.35)}
@media(max-width:991.98px){.hero .scroll{display:none}}
.hero figure{margin:0;position:relative}
.hero figure img{display:block;width:100%;height:auto}
.hero figcaption{position:absolute;right:0;bottom:2%;font-family:var(--mono);font-size:11.5px;
  letter-spacing:.12em;color:#25292D;background:rgba(255,255,255,.62);
  padding:7px 12px;border:1px solid rgba(16,18,20,.12)}
@media(max-width:991.98px){.hero figcaption{display:none}}

/* ---------- 数据条（V3 信息 / V2 字体） ---------- */
.facts{border-bottom:1px solid var(--line);background:var(--paper)}
.facts .wrap{display:grid;grid-template-columns:repeat(4,1fr)}
.facts .wrap > div{padding:28px 0 28px 26px;border-left:1px solid rgba(16,18,20,.12)}
.facts .wrap > div:first-child{border-left:0;padding-left:0}
.facts .k{font-family:var(--mono);font-size:10.5px;letter-spacing:.16em;color:var(--ink-3)}
.facts .v{font-family:var(--mono);font-size:clamp(19px,2vw,25px);margin-top:9px;letter-spacing:-.02em;
  display:flex;align-items:baseline;gap:5px}
.facts .v i{font-style:normal;font-size:11.5px;color:var(--ink-3);letter-spacing:.08em}
@media(max-width:767.98px){
  .facts .wrap{grid-template-columns:1fr 1fr}
  .facts .wrap > div{padding:18px 0 18px 16px}
  .facts .wrap > div:nth-child(odd){border-left:0;padding-left:0}
}

/* ---------- 通用段 ---------- */
.sec{padding:104px 0}
.sec-head{display:flex;justify-content:space-between;align-items:flex-end;gap:40px;flex-wrap:wrap}
.sec-head h2{margin-top:20px;font-size:clamp(28px,3.8vw,52px);line-height:1.14;letter-spacing:-.035em}
.sec-head p{margin-top:16px;max-width:52ch;font-size:15px;line-height:1.9;color:var(--ink-2)}
.more{font-size:13.5px;color:var(--ink);border-bottom:1px solid var(--ink);padding-bottom:3px;
  white-space:nowrap;transition:.2s}
.more:hover{color:var(--copper);border-color:var(--copper)}

/* ---------- 产品中心（V3 结构 / V2 影棚底） ---------- */
.systems{background:var(--studio)}
.systems .sec-head p{color:#2E3236}
.sys-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:0;margin-top:52px;
  border-top:1px solid rgba(16,18,20,.16)}
@media(max-width:991.98px){.sys-grid{grid-template-columns:1fr}}
.sys{padding:34px 30px 32px;border-right:1px solid rgba(16,18,20,.16);
  display:flex;flex-direction:column;gap:16px;transition:background .25s}
.sys:last-child{border-right:0}
.sys:hover{background:rgba(255,255,255,.28)}
@media(max-width:991.98px){.sys{border-right:0;border-bottom:1px solid rgba(16,18,20,.16)}}
.sys .no{font-family:var(--mono);font-size:10.5px;letter-spacing:.2em;color:var(--copper)}
.sys h3{font-size:clamp(22px,2.2vw,28px);line-height:1.2;letter-spacing:-.03em}
.sys .pic{margin:6px 0 4px}
.sys .pic img{display:block;width:100%;height:auto}
.sys .txt{font-size:14px;line-height:1.9;color:#2E3236}
.sys .items{display:flex;flex-wrap:wrap;gap:7px;min-height:60px;align-content:flex-start}
.sys .items li{font-size:12px;color:#2E3236;border:1px solid rgba(16,18,20,.22);padding:4px 9px}
.sys .foot{margin-top:auto;display:flex;justify-content:space-between;align-items:baseline;
  padding-top:14px;border-top:1px solid rgba(16,18,20,.14)}
.sys .foot a{font-size:13px;border-bottom:1px solid currentColor;padding-bottom:2px}
.sys .foot a:hover{color:var(--copper)}
.sys .foot span{font-family:var(--mono);font-size:10.5px;letter-spacing:.1em;color:#3B4045}

/* ---------- 关于（V2 claim 版式） ---------- */
.claim .h2{margin-top:24px;font-size:clamp(28px,4.2vw,56px);line-height:1.16;letter-spacing:-.035em;max-width:20ch}
.claim .h2 b{font-weight:500;color:var(--copper)}
.cols{display:grid;grid-template-columns:repeat(3,1fr);gap:48px;margin-top:66px}
@media(max-width:767.98px){.cols{grid-template-columns:1fr;gap:28px}}
.cols p{font-size:14.8px;line-height:1.95;color:var(--ink-2)}
.cols strong{display:block;font-weight:500;color:var(--ink);margin-bottom:10px;font-size:15.5px}
.claim .figs{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:56px}
@media(max-width:575.98px){.claim .figs{grid-template-columns:1fr}}
.claim .figs figure{margin:0}
.claim .figs img{display:block;width:100%;height:auto}
.claim .figs figcaption{font-family:var(--mono);font-size:11px;letter-spacing:.12em;
  color:#6B7176;margin-top:10px}

/* ---------- 制造（V2 深色块 / V3 内容） ---------- */
.material{background:#2A1F19 linear-gradient(180deg,#30241D 0%,#2A1F19 42%,#241A15 100%);
  color:#F0E8DE;padding:104px 0;position:relative}
.material::before{content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,rgba(200,123,78,.9) 0%,rgba(200,123,78,.25) 60%,rgba(200,123,78,0) 100%)}
.material::after{content:"";position:absolute;left:0;right:0;bottom:0;height:4px;
  background:linear-gradient(90deg,var(--copper) 0%,#C87B4E 45%,rgba(200,123,78,0) 100%);opacity:.55}
.material .kicker{color:rgba(240,232,222,.5)}
.material h2{margin-top:24px;font-size:clamp(28px,3.8vw,52px);line-height:1.18;max-width:30ch}
.material .grid{display:grid;grid-template-columns:1fr 1fr;gap:64px;margin-top:56px}
@media(max-width:991.98px){.material .grid{grid-template-columns:1fr;gap:30px}}
.material .item{padding:24px 0;border-top:1px solid rgba(240,232,222,.16);display:grid;
  grid-template-columns:44px 1fr;gap:16px}
.material .item:first-child{border-top:0;padding-top:0}
.material .item .no{font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;color:#C87B4E;padding-top:4px}
.material .item h4{font-size:16.5px;font-weight:500;margin-bottom:9px}
.material .item p{font-size:14px;line-height:1.95;color:rgba(240,232,222,.68)}
.material .stds{display:flex;flex-wrap:wrap;gap:9px;margin-top:36px;padding-top:28px;
  border-top:1px solid rgba(240,232,222,.16)}
.material .stds span{font-family:var(--mono);font-size:11px;letter-spacing:.08em;
  color:rgba(240,232,222,.82);border:1px solid rgba(240,232,222,.26);padding:6px 11px}
.material .stds span.lbl{border:0;padding:6px 14px 6px 0;color:#C87B4E;
  font-size:10.5px;letter-spacing:.22em}
.material figure{margin:0;position:relative}
.material figure img{display:block;width:100%;height:auto;
  box-shadow:0 24px 60px -30px rgba(0,0,0,.75)}

/* ---------- 新闻 ---------- */
.news-list{margin-top:48px;border-top:1px solid var(--line)}
.news-item{display:grid;grid-template-columns:118px 1fr auto;gap:26px;align-items:center;
  padding:24px 2px;border-bottom:1px solid var(--line);transition:.2s}
.news-item:hover{padding-left:12px;background:rgba(200,200,200,.16)}
.news-item time{font-family:var(--mono);font-size:11.5px;letter-spacing:.08em;color:#6B7176}
.news-item h4{font-size:16px;font-weight:500;letter-spacing:-.01em}
.news-item em{font-style:normal;font-size:11.5px;color:#6B7176;border:1px solid var(--line);padding:4px 10px}
@media(max-width:767.98px){
  .news-item{grid-template-columns:1fr auto;gap:8px}
  .news-item time{grid-column:1/-1}
}

/* ---------- 页脚 ---------- */
footer{background:var(--studio);color:#1A1E22;padding:62px 0 34px;position:relative}
footer::before{content:"";position:absolute;left:0;right:0;top:0;height:2px;
  background:linear-gradient(90deg,var(--copper) 0%,rgba(156,74,47,.25) 55%,rgba(156,74,47,0) 100%)}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:42px}
@media(max-width:767.98px){.foot-grid{grid-template-columns:1fr 1fr;gap:26px}}
footer h5{font-family:var(--mono);font-size:10.5px;letter-spacing:.18em;color:var(--copper);
  margin:0 0 16px;font-weight:400}
footer li{font-size:13.5px;line-height:2.15;color:#1A1E22}
footer a:hover{color:var(--copper)}
footer .brand{font-size:17px;letter-spacing:.08em;color:#101214;font-weight:500}
footer .brand + p{margin-top:12px;font-size:13px;line-height:2;color:rgba(16,18,20,.74)}
.legal{margin-top:44px;padding-top:20px;border-top:1px solid rgba(16,18,20,.16);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-family:var(--mono);font-size:11px;letter-spacing:.1em;color:rgba(16,18,20,.62)}

/* ---------- 动效 ---------- */
.rise{opacity:0;transform:translateY(20px);transition:opacity .85s cubic-bezier(.2,.7,.2,1),transform .85s cubic-bezier(.2,.7,.2,1)}
.rise.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){.rise{opacity:1;transform:none;transition:none}html{scroll-behavior:auto}}