/* 工业企业站：平面、实色、直角、细线分隔 */
:root{--c:#0057b8;--ink:#1d2733;--sub:#55606e;--mute:#8a94a1;--line:#dfe3e8;--bg:#f3f4f6;--r:2px}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:120px}
body{margin:0;font:15px/1.75 -apple-system,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:#fff;-webkit-font-smoothing:antialiased}
a{color:var(--c);text-decoration:none}
img{max-width:100%}
svg{flex:none}
.wrap{max-width:1200px;margin:0 auto;padding:0 28px}

/* 顶部导航 */
.top{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid var(--line)}
.bar{display:flex;align-items:center;height:64px}
.logo{display:flex;align-items:center;gap:10px;font-size:19px;font-weight:700;color:var(--ink);margin-right:auto}
.logo svg{color:var(--c)}
.top nav{display:flex;align-items:center;height:100%}
.top nav a{position:relative;display:flex;align-items:center;height:100%;color:var(--ink);padding:0 16px;font-size:15px}
.top nav a:hover{color:var(--c)}
.top nav a.on{color:var(--c)}
.top nav a.on:after{content:"";position:absolute;left:16px;right:16px;bottom:-1px;height:3px;background:var(--c)}
.top nav a.lang{height:auto;margin-left:16px;padding:4px 0 4px 16px;border-left:1px solid var(--line);font-size:13px;color:var(--sub)}
.top nav a.lang:hover{color:var(--c)}
.burger{display:none;width:40px;height:40px;border:0;background:none;cursor:pointer;padding:11px 9px;flex-direction:column;justify-content:space-between}
.burger i{display:block;height:2px;background:var(--ink);border-radius:2px}

/* 按钮 */
.btn{display:inline-flex;align-items:center;gap:8px;height:42px;padding:0 24px;border:1px solid var(--c);border-radius:var(--r);background:var(--c);color:#fff;font-size:14px;cursor:pointer}
.btn:hover{background:#00479a;border-color:#00479a}
.btn.ghost{background:#fff;color:var(--c)}
.btn.ghost:hover{background:#f0f5fb}
.actions{display:flex;gap:12px;flex-wrap:wrap}

/* 首屏：实色浅灰底 */
.hero{padding:88px 0;background:var(--bg);border-bottom:1px solid var(--line)}
.eyebrow{display:block;font-size:14px;color:var(--c);font-weight:600}
.hero h1{font-size:44px;line-height:1.25;margin:12px 0 16px;max-width:780px}
.hero p{font-size:17px;color:var(--sub);margin:0 0 32px;max-width:620px}

/* 区块 */
.sec{padding:64px 28px}
.sec-tight{padding:36px 28px 72px}
.sec h2{font-size:24px;margin:0 0 24px;padding-bottom:12px;border-bottom:1px solid var(--line)}
.sec-head h2,.sec h2.plain{padding-bottom:0;border-bottom:0}
.sec-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px;padding-bottom:12px;border-bottom:1px solid var(--line)}
.sec-head h2{margin:0}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:14px;color:var(--sub)}
.link-more:hover{color:var(--c)}
.narrow{max-width:680px}
#about{border-top:1px solid var(--line)}
#about p{color:var(--sub);max-width:820px;margin:0 0 12px}
.empty{color:var(--mute);grid-column:1/-1;text-align:center;padding:60px 0}

/* 产品卡片 */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:20px}
.card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--r);color:var(--ink)}
.card:hover{border-color:var(--c)}
.card:hover h3{color:var(--c)}
.card-img{aspect-ratio:4/3;background:#fff;display:flex;align-items:center;justify-content:center;padding:20px;border-bottom:1px solid var(--line)}
.card-img img{width:100%;height:100%;object-fit:contain}
.noimg{color:#c4cad3}
.card-body{padding:16px 18px 18px;display:flex;flex-direction:column;flex:1}
.card h3{margin:0 0 6px;font-size:16px;line-height:1.45;font-weight:600}
.card p{margin:0 0 14px;color:var(--sub);font-size:13.5px;line-height:1.6;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-more{margin-top:auto;display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--c)}
/* 面包屑 */
.crumbs{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--mute);margin-bottom:18px;flex-wrap:wrap}
.crumbs a{color:var(--mute)}
.crumbs a:hover{color:var(--c)}
.crumbs span{color:var(--sub)}

/* 列表页头部 */
.page-head{padding:36px 0 0;border-bottom:1px solid var(--line);background:var(--bg)}
.page-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:22px}
.page-head h1{font-size:30px;margin:0;line-height:1.25}
.count{margin:6px 0 0;font-size:13px;color:var(--mute)}
.search{display:flex;align-items:center;width:360px;max-width:100%;height:40px;padding-left:12px;border:1px solid #cdd3da;border-radius:var(--r);background:#fff;color:var(--mute)}
.search:focus-within{border-color:var(--c)}
.search input{flex:1;min-width:0;height:100%;border:0;outline:0;padding:0 10px;font:inherit;font-size:14px;color:var(--ink);background:none}
.search button{align-self:stretch;margin:-1px -1px -1px 0;padding:0 18px;border:0;border-radius:0 var(--r) var(--r) 0;background:var(--c);color:#fff;font:inherit;font-size:14px;cursor:pointer}
.search button:hover{background:#00479a}
.cats{display:flex;gap:4px;overflow-x:auto;scrollbar-width:none}
.cats::-webkit-scrollbar{display:none}
.cats a{position:relative;flex:none;padding:12px 16px;color:var(--sub);font-size:14px;white-space:nowrap}
.cats a:hover{color:var(--c)}
.cats a.on{color:var(--c);font-weight:600}
.cats a.on:after{content:"";position:absolute;left:16px;right:16px;bottom:-1px;height:3px;background:var(--c)}
.pager{margin:44px 0 0;display:flex;justify-content:center;gap:4px}
.pager a,.pager span{min-width:36px;height:36px;display:inline-flex;align-items:center;justify-content:center;padding:0 10px;border:1px solid var(--line);border-radius:var(--r);color:var(--sub);font-size:13px}
.pager span{border:0}
.pager a:hover{border-color:var(--c);color:var(--c)}
.pager a.on{background:var(--c);border-color:var(--c);color:#fff}

/* 产品详情 */
.phero{padding:28px 0 56px;border-bottom:1px solid var(--line)}
.two{display:grid;grid-template-columns:1fr 1.05fr;gap:56px;align-items:center}
.chip{display:inline-block;font-size:13px;color:var(--sub);margin-bottom:10px}
.ptitle{font-size:34px;line-height:1.25;margin:0}
.psub{font-size:18px;color:var(--c);margin:10px 0 24px}
.feat{list-style:none;padding:0;margin:0 0 32px;display:grid;gap:10px}
.feat li{display:flex;gap:10px;align-items:flex-start;font-size:15px}
.feat li svg{color:var(--c);margin-top:5px}
.pimg{min-width:0}
.gal-main,.gal-empty{border:1px solid var(--line);height:440px;display:flex;align-items:center;justify-content:center;padding:28px;background:#fff}
.gal-main{cursor:zoom-in}
.gal-main img{max-width:100%;max-height:100%;object-fit:contain}
.gal-empty{color:#c4cad3;background:var(--bg)}
.thumbs{display:flex;gap:8px;margin-top:10px;flex-wrap:wrap}
.thumbs img{width:64px;height:64px;object-fit:contain;padding:4px;border:1px solid var(--line);cursor:pointer;background:#fff}
.thumbs img:hover{border-color:#aeb6c0}
.thumbs img.on{border-color:var(--c)}
.lightbox{position:fixed;inset:0;z-index:100;background:rgba(10,14,20,.9);display:flex;align-items:center;justify-content:center}
.lightbox>img{max-width:86vw;max-height:86vh;object-fit:contain;background:#fff;padding:12px}
.lightbox button{position:absolute;display:flex;align-items:center;justify-content:center;padding:0;border:0;background:rgba(255,255,255,.1);color:#fff;cursor:pointer;width:44px;height:44px}
.lightbox button:hover{background:rgba(255,255,255,.2)}
.lb-x{top:22px;right:24px}
.lb-n{top:50%;margin-top:-23px}
.lb-n.prev{left:24px}
.lb-n.next{right:24px}

/* 详情正文 + 右侧目录 */
.pbody{display:grid;grid-template-columns:minmax(0,1fr) 200px;gap:56px;padding:0 28px}
.pbody.no-toc{grid-template-columns:minmax(0,1fr)}
.psec{padding:56px 0 8px;scroll-margin-top:64px}
.psec h2{font-size:24px;margin:0 0 24px;padding-bottom:12px;border-bottom:1px solid var(--line)}
.toc{padding-top:56px}
.toc-in{position:sticky;top:96px}
.toc-title{font-size:13px;color:var(--mute);margin-bottom:10px}
.toc a{display:block;padding:8px 0 8px 14px;border-left:2px solid var(--line);font-size:14px;color:var(--sub)}
.toc a:hover{color:var(--ink)}
.toc a.on{border-left-color:var(--c);color:var(--c);font-weight:600}
.toc a.toc-btn{display:flex;justify-content:center;margin-top:20px;padding:9px 12px;border:0;color:#fff;font-weight:400}
.toc a.toc-btn:hover{color:#fff}
.prose{max-width:820px;color:#333d49}
.prose p{margin:0 0 14px}
.prose h3{font-size:18px;color:var(--ink);margin:28px 0 12px}
.prose h3:first-child{margin-top:0}
.prose figure{margin:20px 0 24px}
.prose figure img{display:block;width:100%;max-width:560px;border:1px solid var(--line);background:#fff}
.prose figcaption{font-size:13px;color:var(--mute);margin-top:8px}
.sub-h{font-size:16px;margin:28px 0 12px;color:var(--ink)}
.psec h2+.sub-h{margin-top:0}

/* 规格：传统表格样式 */
.spec{display:grid;grid-template-columns:repeat(2,1fr);border-top:1px solid var(--line);column-gap:40px}
.spec-row{display:flex;justify-content:space-between;align-items:baseline;gap:20px;padding:12px 0;border-bottom:1px solid var(--line)}
.spec-row span{color:var(--sub);font-size:14px}
.spec-row b{font-weight:600;font-size:14px;text-align:right}

/* 下载：表格 */
.dl-table{border-top:1px solid var(--line)}
.dl-row{display:grid;grid-template-columns:minmax(0,1fr) 110px 110px 96px;align-items:center;gap:16px;padding:12px 0;border-bottom:1px solid var(--line);font-size:14px;color:var(--sub)}
.dl-head{font-size:13px;color:var(--mute);padding:8px 0;background:none}
a.dl-row:hover{background:#f7f8fa}
a.dl-row:hover .dl-btn{background:var(--c);color:#fff}
.dl-name{display:flex;align-items:center;gap:10px;color:var(--ink)}
.dl-name svg{flex:none;color:var(--c)}
.dl-name small{display:block;font-size:12px;color:var(--mute)}
.dl-btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;height:30px;border:1px solid var(--c);color:var(--c);border-radius:var(--r);font-size:13px}

/* 表单 */
.form{padding:0}
.form label{display:block;margin-bottom:16px;font-size:14px;color:var(--ink)}
.form input,.form textarea{display:block;width:100%;padding:9px 12px;border:1px solid #cdd3da;border-radius:var(--r);font:inherit;font-size:15px;color:var(--ink);margin-top:6px;background:#fff;outline:0}
.form input:focus,.form textarea:focus{border-color:var(--c)}
.form .btn{margin-top:6px}
.hp{position:absolute;left:-9999px}
.ok{background:#eef8f1;color:#1f7a45;border-left:3px solid #2e9a5b;padding:12px 16px}

/* 页脚 */
footer{background:#262d36;color:#a3abb5;font-size:13px;margin-top:40px}
.foot{display:flex;justify-content:space-between;gap:32px;flex-wrap:wrap;padding:40px 28px 28px}
.foot-name{color:#fff;font-size:16px;font-weight:600;margin-bottom:6px}
.foot p{margin:0}
.foot-contact{display:flex;flex-direction:column;gap:4px;text-align:right}
.foot-copy{border-top:1px solid #39424d;padding:16px 28px;color:#7d8692}

/* 手机端 */
@media(max-width:860px){
  .burger{display:flex}
  .top nav{position:absolute;left:0;right:0;top:64px;flex-direction:column;align-items:stretch;gap:0;background:#fff;border-bottom:1px solid var(--line);padding:8px 20px 18px;display:none}
  .top nav{height:auto}
  .top nav a{height:auto;padding:12px 4px;border-bottom:1px solid var(--line)}
  .top nav a.on:after{display:none}
  .top nav a.lang{margin:0;padding:12px 4px;border-left:0}
  body.nav-open .top nav{display:flex}
  .hero{padding:56px 0}
  .hero h1{font-size:30px}
  .hero p{font-size:16px}
  .two{grid-template-columns:1fr;gap:32px}
  .pimg{order:-1}
  .ptitle{font-size:26px}
  .gal-main,.gal-empty{height:300px}
  .sec{padding:48px 28px}
  .page-head h1{font-size:28px}
  .search{width:100%}
  .spec{grid-template-columns:1fr}
  .pbody{grid-template-columns:minmax(0,1fr)}
  .toc{display:none}
  .psec{padding-top:40px}
  .dl-row{grid-template-columns:minmax(0,1fr) 84px}
  .dl-row>span:nth-child(2),.dl-row>span:nth-child(3){display:none}
  .foot-contact{text-align:left}
}