:root{
  --bg:#0e1116; --bg2:#151a21; --panel:#1a212b; --panel2:#212a36;
  --line:#2a3340; --text:#d8dee7; --muted:#8b97a7; --dim:#6b7686;
  --gold:#d9a94f; --gold2:#ecc67f; --steel:#5b9aa8;
  --accent:#d9a94f;
  --maxw:1240px;
  --r:12px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"Segoe UI","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  background:var(--bg);color:var(--text);line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.btn{display:inline-block;padding:11px 22px;border-radius:6px;font-weight:600;font-size:14px;transition:.2s;cursor:pointer;border:1px solid transparent}
.btn-primary{background:linear-gradient(135deg,var(--gold),var(--gold2));color:#1a1305}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-1px)}
.btn-ghost{border-color:var(--line);color:var(--text)}
.btn-ghost:hover{border-color:var(--gold);color:var(--gold)}

/* 顶部条 */
.topbar{background:#0a0d12;border-bottom:1px solid var(--line);font-size:12px}
.topbar-in{display:flex;justify-content:space-between;padding:7px 20px;color:var(--dim)}
.topbar a{color:var(--muted);margin-left:16px}
.topbar a:hover{color:var(--gold)}

/* 头部 */
.header{position:sticky;top:0;z-index:50;background:rgba(14,17,22,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.header-in{display:flex;align-items:center;gap:16px;height:72px}
.logo{display:flex;align-items:center;gap:12px;flex-shrink:0}
.logo-img{height:38px;width:auto;display:block}
.logo-mark{width:40px;height:40px;border-radius:8px;background:linear-gradient(135deg,var(--gold),#9c7327);color:#15100a;font-weight:800;display:grid;place-items:center;font-size:17px;letter-spacing:1px}
.logo-txt b{font-size:17px;display:block;color:#fff;letter-spacing:.5px}
.logo-txt i{font-style:normal;font-size:10px;color:var(--dim);letter-spacing:1.5px}
.nav{flex:1}
.nav-list{display:flex;gap:4px;list-style:none}
.nav-item{position:relative}
.nav-item>a{display:flex;align-items:center;gap:5px;padding:10px 11px;font-size:14px;color:var(--text);border-radius:6px;transition:.15s;white-space:nowrap}
.nav-item>a:hover{color:var(--gold);background:var(--bg2)}
.caret{border:4px solid transparent;border-top-color:currentColor;margin-top:3px}
.has-mega:hover .mega{display:flex}
.mega{display:none;position:absolute;top:100%;left:0;background:var(--bg2);border:1px solid var(--line);border-radius:10px;
  box-shadow:0 18px 40px rgba(0,0,0,.5);padding:18px;gap:26px;min-width:520px}
.mm-col{display:flex;flex-direction:column;min-width:140px}
.mm-title{font-weight:700;color:var(--gold);margin-bottom:6px;font-size:14px}
.mm-title:hover{text-decoration:underline}
.mm-sub{font-size:13px;color:var(--muted);padding:3px 0}
.mm-sub:hover{color:var(--text)}
.search{display:flex;gap:6px;flex-shrink:0}
.search input{background:var(--bg2);border:1px solid var(--line);color:var(--text);padding:8px 12px;border-radius:6px;width:140px;font-size:13px}
.search button{background:var(--gold);border:0;color:#1a1305;padding:0 14px;border-radius:6px;cursor:pointer;font-weight:600}
.nav-toggle{display:none;background:none;border:1px solid var(--line);color:var(--text);font-size:20px;border-radius:6px;width:42px;height:38px;margin-left:auto}

/* 封面轮播 */
.cover{position:relative;height:560px;overflow:hidden}
.cover-track{height:100%;display:flex;transition:transform .6s ease}
.slide{flex:0 0 100%;height:100%;background-size:cover;background-position:center;display:flex;align-items:center;background-color:var(--bg)}
.cover-in{max-width:var(--maxw);margin:0 auto;padding:0 20px;width:100%}
.cover-eyebrow{color:var(--gold);letter-spacing:3px;font-size:13px;font-weight:600}
.cover-title{font-size:46px;line-height:1.18;color:#fff;margin:14px 0;font-weight:800;letter-spacing:1px;text-shadow:0 2px 20px rgba(0,0,0,.6)}
.cover-sub{color:#cfd6e0;max-width:560px;font-size:16px}
.cover-actions{margin-top:26px;display:flex;gap:14px}
.cover-dots{position:absolute;bottom:20px;left:50%;transform:translateX(-50%);display:flex;gap:8px}
.cover-dots span{width:10px;height:10px;border-radius:50%;background:rgba(255,255,255,.3);cursor:pointer}
.cover-dots span.active{background:var(--gold);width:26px;border-radius:6px}

/* 区块 */
.section{padding:64px 0}
.section-alt{background:var(--bg2)}
.sec-head{margin-bottom:30px;text-align:center}
.sec-en{color:var(--gold);letter-spacing:3px;font-size:12px;font-weight:600;text-transform:uppercase}
.sec-head h2{font-size:30px;color:#fff;margin-top:6px;letter-spacing:1px}
.sec-desc{font-size:14px;color:var(--dim);margin-top:10px;max-width:640px;margin-left:auto;margin-right:auto}
.sec-more,.sec-more{float:right;color:var(--gold);font-size:14px}
.lead{font-size:16px;color:var(--muted);max-width:880px;margin:0 auto 24px;text-align:center}

/* 业务板块 */
.biz-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.biz-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:24px;transition:.2s;display:flex;flex-direction:column;gap:8px}
.biz-card:hover{border-color:var(--gold);transform:translateY(-3px);background:var(--panel2);box-shadow:0 14px 34px rgba(0,0,0,.42)}
.biz-en{color:var(--dim);font-size:11px;letter-spacing:2px}
.biz-card h3{color:#fff;font-size:19px}
.biz-card p{color:var(--muted);font-size:13px;flex:1}
.biz-go{color:var(--gold);font-size:13px;font-weight:600}

/* 产品网格 */
.prod-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.prod-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;transition:.2s}
.prod-card:hover{border-color:var(--gold);transform:translateY(-3px);box-shadow:0 14px 34px rgba(0,0,0,.42)}
.prod-img{aspect-ratio:4/3;background:#0c0f14;display:grid;place-items:center;overflow:hidden}
.prod-img img{width:100%;height:100%;object-fit:contain;padding:8px;transition:.3s}
.prod-card:hover .prod-img img{transform:scale(1.04)}
.prod-body{padding:12px 14px}
.prod-body h4{font-size:14px;color:#e7ecf3;font-weight:600;line-height:1.4;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.prod-code{display:inline-block;margin-top:5px;font-size:11px;color:var(--gold);background:rgba(212,162,78,.12);padding:2px 8px;border-radius:4px}

/* 页面头 */
.page-head{padding:40px 0 10px;background:linear-gradient(180deg,var(--bg2),var(--bg));border-bottom:1px solid var(--line)}
.page-head .sec-head{text-align:left;margin-bottom:10px}
.crumb{font-size:13px;color:var(--dim)}
.crumb a:hover{color:var(--gold)}
.crumb span{margin:0 8px;color:var(--line)}

/* 富文本 */
.rich{color:var(--muted);font-size:15px}
.rich p{margin:10px 0}
.rich img{max-width:100%;border-radius:8px;margin:12px 0}
.rich table{border-collapse:collapse;width:100%;margin:14px 0;font-size:14px}
.rich table td,.rich table th{border:1px solid var(--line);padding:8px 10px}
.rich table td:first-child{background:var(--bg2);font-weight:600;color:var(--text);width:140px}
.empty{color:var(--dim);text-align:center;padding:40px}

/* 两栏 */
.two-col{display:grid;grid-template-columns:1.4fr .9fr;gap:40px;align-items:start}
.stat-box{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.stat{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:20px}
.stat b{font-size:26px;color:var(--gold);display:block}
.stat span{font-size:13px;color:var(--muted)}

/* 材料中心 */
.mat-layout{display:grid;grid-template-columns:240px 1fr;gap:30px;align-items:start}
.mat-side{position:sticky;top:90px}
.mat-search input{width:100%;background:var(--bg2);border:1px solid var(--line);color:var(--text);padding:10px;border-radius:6px;margin-bottom:16px}
.mat-search button{display:none}
.side-title{font-size:13px;color:var(--gold);letter-spacing:2px;margin-bottom:10px;text-transform:uppercase}
.sys-list{list-style:none}
.sys-list a{display:block;padding:8px 12px;border-radius:6px;color:var(--muted);font-size:14px;border-left:2px solid transparent}
.sys-list a:hover{background:var(--bg2);color:var(--gold);border-left-color:var(--gold)}
.mat-tip{color:var(--muted);font-size:14px;margin-bottom:18px}
.mat-tip b{color:var(--gold)}
.rel-title{font-size:20px;color:#fff;margin:36px 0 18px;padding-left:12px;border-left:3px solid var(--gold)}

/* 联系 */
.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:24px}
.c-box{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:22px}
.c-box h4{color:var(--gold);margin-bottom:10px}
.c-box p{color:var(--muted);font-size:14px}

/* 详情 */
.detail{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
.detail-gallery .main-img{background:#0c0f14;border:1px solid var(--line);border-radius:var(--r);aspect-ratio:4/3;display:grid;place-items:center;overflow:hidden}
.detail-gallery .main-img img{width:100%;height:100%;object-fit:contain;padding:12px}
.thumbs{display:flex;gap:10px;margin-top:12px;flex-wrap:wrap}
.thumb{width:72px;height:72px;object-fit:contain;background:#0c0f14;border:1px solid var(--line);border-radius:8px;padding:4px;cursor:pointer}
.thumb:hover{border-color:var(--gold)}
.detail-info h1{font-size:30px;color:#fff;margin:10px 0}
.sku{color:var(--muted);margin-bottom:14px}
.sku b{color:var(--gold)}
.summary{color:var(--muted);margin-bottom:18px}
.spec{margin-top:30px;background:var(--bg2);border:1px solid var(--line);border-radius:var(--r);padding:24px}

/* 搜索条 */
.search-bar{display:flex;gap:10px;margin-bottom:24px;max-width:560px}
.search-bar input{flex:1;background:var(--bg2);border:1px solid var(--line);color:var(--text);padding:12px 14px;border-radius:6px}
.search-bar button{background:var(--gold);border:0;color:#1a1305;padding:0 22px;border-radius:6px;font-weight:600;cursor:pointer}

/* 页脚 */
.footer{background:#0a0d12;border-top:1px solid var(--line);margin-top:40px;padding:46px 0 24px}
.footer-in{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:30px}
.f-col h4{color:var(--gold);margin-bottom:12px;font-size:15px}
.f-col p{color:var(--muted);font-size:14px;margin:4px 0}
.f-col a{color:var(--muted)}
.f-col a:hover{color:var(--gold)}
.copyright{border-top:1px solid var(--line);margin-top:30px;padding-top:18px;color:var(--dim);font-size:13px;text-align:center}

/* 响应式 */
@media(max-width:1100px){
  .search{display:none}
  .biz-grid,.prod-grid{grid-template-columns:repeat(2,1fr)}
  .detail,.two-col,.mat-layout{grid-template-columns:1fr}
  .mat-side{position:static}
  .mega{min-width:0;left:-20px}
}
@media(max-width:900px){
  .topbar{display:none}
  .header-in{height:60px;position:relative}
  .logo-img{height:32px}
  .nav{display:none;position:absolute;top:100%;left:0;right:0;background:var(--bg2);border-bottom:1px solid var(--line);max-height:calc(100vh - 60px);overflow-y:auto;box-shadow:0 24px 40px rgba(0,0,0,.55)}
  .nav.open{display:block}
  .nav-list{flex-direction:column;gap:0;padding:8px 0}
  .nav-item>a{padding:13px 20px;font-size:15px;border-radius:0;justify-content:space-between}
  .nav-toggle{display:flex;align-items:center;justify-content:center}
  .mega{position:static;display:none!important;box-shadow:none;border:0;border-top:1px solid var(--line);padding:0 0 10px;min-width:0;gap:0;background:transparent}
  .nav-item.open .mega{display:block!important}
  .mm-col{min-width:0;padding:0}
  .mm-title{padding:8px 24px;margin:0;font-size:14px}
  .mm-sub{padding:6px 32px;font-size:13px}
  .cover{height:440px}.cover-title{font-size:33px}
  .biz-grid,.prod-grid{grid-template-columns:1fr 1fr}
  .footer-in{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
}