:root{--navy:#0b1f3a;--navy-2:#122b4f;--ink:#0f172a;--text:#1f2937;--muted:#64748b;--line:#e2e8f0;--bg:#f5f7fa;--white:#fff;--accent:#f97316;--accent-2:#ea580c;--radius:10px;--shadow:0 10px 30px rgba(15,23,42,.08);--container:1200px}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:"Inter","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;color:var(--text);background:var(--white);line-height:1.65;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{margin:0;line-height:1.25;color:var(--ink);font-weight:700}
p{margin:0 0 1em}
svg{width:1em;height:1em}
.container{max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:88px 0}
.section.alt{background:var(--bg)}
.section-head{max-width:720px;margin-bottom:44px}
.section-head.center{text-align:center;margin-left:auto;margin-right:auto}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:13px;letter-spacing:.18em;text-transform:uppercase;color:var(--accent);font-weight:600;margin-bottom:14px}
.eyebrow::before{content:"";width:28px;height:2px;background:var(--accent)}
.section-head h2{font-size:clamp(26px,3.2vw,38px)}
.section-head p{color:var(--muted);margin:14px 0 0;font-size:16px}
.section-foot{text-align:center;margin-top:40px}
.muted{color:var(--muted)}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);transition:box-shadow .2s}
body.scrolled .site-header{box-shadow:0 4px 20px rgba(15,23,42,.08)}
.header-inner{display:flex;align-items:center;gap:32px;height:76px;position:relative}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0}
.brand img{height:44px;width:auto}
.brand .ico-mark{width:40px;height:40px;object-fit:contain}
.brand-text b{display:block;font-size:20px;color:var(--ink);letter-spacing:.02em;line-height:1.2}
.brand-text small{display:block;font-size:10px;letter-spacing:.2em;color:var(--muted)}
.nav{display:flex;gap:6px;margin-left:auto}
.nav a{padding:10px 16px;border-radius:8px;font-weight:500;font-size:15px;color:var(--text);position:relative}
.nav a:hover{background:var(--bg)}
.nav a.active{color:var(--accent)}
.nav a.active::after{content:"";position:absolute;left:16px;right:16px;bottom:4px;height:2px;background:var(--accent)}
.header-cta{flex-shrink:0}
.nav-toggle{display:none;margin-left:auto;background:none;border:1px solid var(--line);border-radius:8px;width:44px;height:44px;cursor:pointer;flex-direction:column;justify-content:center;align-items:center;gap:5px;padding:0}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--ink)}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 24px;border-radius:8px;font-weight:600;font-size:15px;border:1px solid transparent;cursor:pointer;transition:.2s;white-space:nowrap;line-height:1.3;font-family:inherit}
.btn svg{width:18px;height:18px}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-2);transform:translateY(-1px)}
.btn-outline{border-color:var(--ink);color:var(--ink)}
.btn-outline:hover{background:var(--ink);color:#fff}
.btn-light{border-color:rgba(255,255,255,.5);color:#fff}
.btn-light:hover{background:#fff;color:var(--navy)}
.btn-sm{padding:8px 16px;font-size:14px}

/* hero */
.hero{position:relative;color:#fff;background:linear-gradient(105deg,rgba(11,31,58,.96) 0%,rgba(11,31,58,.82) 45%,rgba(11,31,58,.55) 100%),url(/static/img/hero.jpg) center/cover no-repeat,var(--navy);overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.06) 1px,transparent 1px);background-size:64px 64px;-webkit-mask-image:linear-gradient(to bottom,rgba(0,0,0,.9),transparent);mask-image:linear-gradient(to bottom,rgba(0,0,0,.9),transparent);pointer-events:none}
.hero-inner{position:relative;padding:120px 0 110px;max-width:680px}
.hero .eyebrow{color:#fdba74}
.hero h1{color:#fff;font-size:clamp(34px,5vw,58px);letter-spacing:.01em;margin-bottom:22px}
.hero p{font-size:18px;color:rgba(255,255,255,.82);max-width:560px;margin-bottom:36px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-tags{display:flex;gap:10px;flex-wrap:wrap;margin-top:44px}
.hero-tags span{padding:6px 14px;border:1px solid rgba(255,255,255,.25);border-radius:999px;font-size:13px;color:rgba(255,255,255,.85)}

/* stats */
.stats{background:#fff;border-bottom:1px solid var(--line)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.stat{padding:36px 24px;border-right:1px solid var(--line);text-align:center}
.stat:last-child{border-right:0}
.stat b{display:block;font-size:40px;color:var(--navy);line-height:1;font-weight:800}
.stat b small{font-size:18px;color:var(--accent);margin-left:2px}
.stat span{display:block;color:var(--muted);margin-top:8px;font-size:14px}

/* grid + cards */
.grid{display:grid;gap:24px}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.25s;display:flex;flex-direction:column}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:transparent}
.card-media{aspect-ratio:4/3;background:var(--bg);overflow:hidden}
.card-media.wide{aspect-ratio:16/9}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.card:hover .card-media img{transform:scale(1.04)}
.card-body{padding:18px 20px 20px;flex:1;display:flex;flex-direction:column;gap:6px}
.card-body h3{font-size:16px;font-weight:600;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-body p{font-size:14px;color:var(--muted);margin:4px 0 0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-meta{font-size:13px;color:var(--muted);display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.tag{display:inline-block;padding:2px 10px;border-radius:999px;background:#fff7ed;color:var(--accent-2);font-size:12px;font-weight:600}
.sku{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:12px;color:var(--muted)}
.news-date{font-size:13px;color:var(--muted)}
.empty{padding:64px 24px;text-align:center;color:var(--muted);border:1px dashed #cbd5e1;border-radius:var(--radius)}

/* category cards */
.cat-card{position:relative;border-radius:var(--radius);overflow:hidden;aspect-ratio:4/3;background:linear-gradient(135deg,var(--navy),#1e3a5f);color:#fff;display:block}
.cat-card img{width:100%;height:100%;object-fit:cover;opacity:.85;transition:.4s}
.cat-card:hover img{transform:scale(1.05);opacity:.95}
.cat-card .cat-info{position:absolute;inset:auto 0 0 0;padding:18px 20px;background:linear-gradient(to top,rgba(11,31,58,.95),rgba(11,31,58,0))}
.cat-card h3{color:#fff;font-size:18px}
.cat-card span{font-size:13px;color:rgba(255,255,255,.75)}

/* about */
.about-grid,.intro-grid{display:grid;grid-template-columns:1.05fr 1fr;gap:64px;align-items:center}
.about-visual{position:relative;border-radius:var(--radius);overflow:hidden;aspect-ratio:4/3;background:var(--img,none) center/cover,linear-gradient(135deg,var(--navy),#1e3a5f)}
.about-visual::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);background-size:48px 48px}
.about-visual .badge{position:absolute;left:24px;bottom:24px;background:var(--accent);color:#fff;padding:16px 20px;border-radius:8px;box-shadow:0 10px 24px rgba(0,0,0,.2)}
.about-visual .badge b{display:block;font-size:32px;line-height:1}
.about-visual .badge b small{font-size:16px}
.about-visual .badge span{font-size:13px}
.about-text h2{font-size:clamp(26px,3vw,36px);margin-bottom:18px}
.about-text .prose{color:var(--muted)}
.adv-list{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:28px 0 32px;padding:0;list-style:none}
.adv-list li{display:flex;gap:12px;align-items:flex-start}
.adv-list svg{width:22px;height:22px;color:var(--accent);flex-shrink:0;margin-top:2px}
.adv-list b{display:block;font-size:15px;color:var(--ink)}
.adv-list span{font-size:13px;color:var(--muted)}
.adv-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.adv-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px 24px;transition:.25s}
.adv-card:hover{box-shadow:var(--shadow);transform:translateY(-4px)}
.adv-card .ico{width:52px;height:52px;border-radius:12px;background:#fff7ed;color:var(--accent);display:flex;align-items:center;justify-content:center;margin-bottom:18px}
.adv-card .ico svg{width:26px;height:26px}
.adv-card h3{font-size:17px;margin-bottom:8px}
.adv-card p{color:var(--muted);font-size:14px;margin:0}
.photo-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.photo-grid figure{margin:0;border-radius:var(--radius);overflow:hidden;aspect-ratio:3/2;background:var(--bg)}
.photo-grid img{width:100%;height:100%;object-fit:cover;transition:.4s}
.photo-grid figure:hover img{transform:scale(1.05)}
.photo-grid.portrait{grid-template-columns:repeat(4,1fr)}
.photo-grid.portrait figure{aspect-ratio:3/4}
.timeline{list-style:none;margin:0 0 0 80px;padding:0;position:relative;border-left:2px solid var(--line)}
.timeline li{position:relative;padding:0 0 32px 32px}
.timeline li:last-child{padding-bottom:0}
.timeline li::before{content:"";position:absolute;left:-7px;top:6px;width:12px;height:12px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px #fff7ed}
.timeline b{position:absolute;left:-90px;top:0;width:56px;text-align:right;color:var(--navy);font-size:17px}
.timeline span{color:var(--text)}

/* cta */
.cta{background:linear-gradient(100deg,rgba(11,31,58,.95),rgba(11,31,58,.8)),url(/static/img/cta.jpg) center/cover,var(--navy);color:#fff;padding:72px 0}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta h2{color:#fff;font-size:clamp(24px,3vw,34px);margin-bottom:10px}
.cta p{color:rgba(255,255,255,.78);margin:0}

/* footer */
.site-footer{background:var(--ink);color:rgba(255,255,255,.7);padding:64px 0 0;font-size:14px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.3fr;gap:40px}
.site-footer h4{color:#fff;font-size:15px;margin-bottom:18px;letter-spacing:.04em}
.site-footer ul{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.site-footer a:hover{color:#fff}
.footer-brand b{display:block;color:#fff;font-size:20px;margin-bottom:12px}
.footer-brand p{margin:0;line-height:1.8}
.footer-contact li{display:flex;gap:10px;align-items:flex-start}
.footer-contact svg{width:18px;height:18px;flex-shrink:0;color:var(--accent);margin-top:3px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);margin-top:48px;padding:22px 0;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:rgba(255,255,255,.45)}

/* inner page banner */
.page-banner{background:linear-gradient(100deg,rgba(11,31,58,.95),rgba(11,31,58,.7)),var(--banner,none) center/cover,var(--navy);color:#fff;padding:72px 0 64px;position:relative;overflow:hidden}
.page-banner h1{color:#fff;font-size:clamp(28px,4vw,44px)}
.page-banner p{color:rgba(255,255,255,.75);margin:10px 0 0;font-size:16px}
.breadcrumb{display:flex;gap:8px;font-size:13px;color:rgba(255,255,255,.6);margin-bottom:16px;flex-wrap:wrap}
.breadcrumb a:hover{color:#fff}
.breadcrumb.dark{color:var(--muted);margin:0 0 24px}
.breadcrumb.dark a:hover{color:var(--accent)}

/* products */
.layout{display:grid;grid-template-columns:270px 1fr;gap:40px;align-items:start}
.sidebar{position:sticky;top:96px}
.sidebar details{border:1px solid var(--line);border-radius:var(--radius);background:#fff;overflow:hidden}
.sidebar summary{list-style:none;cursor:pointer;padding:16px 20px;font-weight:700;color:var(--ink);display:flex;justify-content:space-between;align-items:center;background:var(--bg)}
.sidebar summary::-webkit-details-marker{display:none}
.sidebar summary svg{width:16px;height:16px;transform:rotate(90deg);transition:.2s}
.sidebar details[open] summary svg{transform:rotate(-90deg)}
.cat-tree{list-style:none;margin:0;padding:8px 0}
.cat-tree > li{border-bottom:1px solid var(--bg)}
.cat-tree > li:last-child{border-bottom:0}
.cat-tree a{display:flex;justify-content:space-between;padding:10px 20px;font-size:14px;color:var(--text)}
.cat-tree a:hover,.cat-tree a.active{color:var(--accent);background:#fff7ed}
.cat-tree > li > a{font-weight:600}
.cat-tree ul{list-style:none;margin:0;padding:0 0 6px}
.cat-tree ul a{padding:7px 20px 7px 34px;font-size:13px;color:var(--muted);font-weight:400}
.cat-tree .count{font-size:12px;color:var(--muted);font-weight:400}
.toolbar{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-bottom:24px;flex-wrap:wrap}
.toolbar h2{font-size:22px}
.toolbar h2 small{font-size:14px;color:var(--muted);font-weight:400;margin-left:10px}
.search{display:flex;border:1px solid var(--line);border-radius:8px;overflow:hidden;background:#fff}
.search input{border:0;padding:10px 14px;font-size:14px;min-width:240px;outline:0;font-family:inherit}
.search button{border:0;background:var(--navy);color:#fff;padding:0 16px;cursor:pointer;display:flex;align-items:center}
.search button svg{width:18px;height:18px}
.pagination{display:flex;gap:6px;justify-content:center;margin-top:40px;flex-wrap:wrap}
.pagination a,.pagination span{min-width:38px;height:38px;padding:0 10px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:8px;font-size:14px;background:#fff}
.pagination a:hover{border-color:var(--accent);color:var(--accent)}
.pagination .current{background:var(--navy);color:#fff;border-color:var(--navy)}
.pagination .disabled{color:#cbd5e1}

/* product detail */
.product-hero{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start}
.gallery-main{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;aspect-ratio:1;background:var(--bg)}
.gallery-main img{width:100%;height:100%;object-fit:contain}
.gallery-thumbs{display:flex;gap:10px;margin-top:12px;flex-wrap:wrap}
.gallery-thumbs img{width:72px;height:72px;object-fit:cover;border:2px solid var(--line);border-radius:6px;cursor:pointer;background:var(--bg)}
.gallery-thumbs img.active,.gallery-thumbs img:hover{border-color:var(--accent)}
.product-info h1{font-size:clamp(24px,3vw,32px);margin:10px 0 8px}
.product-info .sku{font-size:13px;margin-bottom:14px}
.product-info .brief{color:var(--muted);font-size:15px}
.spec-table{width:100%;border-collapse:collapse;margin:24px 0;font-size:14px}
.spec-table th,.spec-table td{padding:10px 14px;border:1px solid var(--line);text-align:left;vertical-align:top}
.spec-table th{background:var(--bg);width:34%;font-weight:600;color:var(--ink)}
.product-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:8px}
.prose{color:var(--text);font-size:15.5px}
.prose h2,.prose h3{margin:1.4em 0 .6em;font-size:1.25em}
.prose img{border-radius:8px;margin:1em 0}
.prose table{border-collapse:collapse;width:100%;margin:1em 0}
.prose th,.prose td{border:1px solid var(--line);padding:8px 12px}
.prose ul,.prose ol{padding-left:1.4em}
.detail-section{margin-top:56px}
.detail-section h2{font-size:20px;padding-bottom:12px;border-bottom:2px solid var(--line);margin-bottom:20px;position:relative}
.detail-section h2::after{content:"";position:absolute;left:0;bottom:-2px;width:64px;height:2px;background:var(--accent)}

/* news */
.tabs{display:flex;gap:8px;margin-bottom:28px;flex-wrap:wrap}
.tabs a{padding:8px 18px;border-radius:999px;border:1px solid var(--line);font-size:14px;background:#fff}
.tabs a.active{background:var(--navy);color:#fff;border-color:var(--navy)}
.news-list{display:grid;gap:20px}
.news-item{display:grid;grid-template-columns:280px 1fr;gap:28px;padding:20px;border:1px solid var(--line);border-radius:var(--radius);background:#fff;transition:.25s;align-items:center}
.news-item:hover{box-shadow:var(--shadow);transform:translateY(-2px)}
.news-item .thumb{aspect-ratio:16/9;border-radius:8px;overflow:hidden;background:var(--bg)}
.news-item .thumb img{width:100%;height:100%;object-fit:cover}
.news-item h3{font-size:19px;margin:6px 0 10px}
.news-item p{color:var(--muted);font-size:14px;margin:0 0 12px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-item .more{color:var(--accent);font-weight:600;font-size:14px}
.article{max-width:860px;margin:0 auto}
.article header{text-align:center;margin-bottom:36px;padding-bottom:28px;border-bottom:1px solid var(--line)}
.article header h1{font-size:clamp(24px,3vw,34px);margin:12px 0}
.article .cover{border-radius:var(--radius);overflow:hidden;margin-bottom:32px}
.article-nav{display:flex;justify-content:space-between;gap:16px;margin-top:48px;padding-top:24px;border-top:1px solid var(--line);font-size:14px;flex-wrap:wrap}
.article-nav a{color:var(--navy);font-weight:600}
.article-nav a:hover{color:var(--accent)}

/* contact */
.contact-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:48px;align-items:start}
.info-cards{display:grid;gap:16px}
.info-card{display:flex;gap:16px;padding:22px;border:1px solid var(--line);border-radius:var(--radius);background:#fff}
.info-card .ico{width:46px;height:46px;border-radius:10px;background:var(--navy);color:#fff;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.info-card .ico svg{width:22px;height:22px}
.info-card b{display:block;font-size:13px;color:var(--muted);font-weight:500;margin-bottom:4px}
.info-card span{font-size:16px;color:var(--ink);font-weight:600}
.qr{text-align:center;padding:20px;border:1px solid var(--line);border-radius:var(--radius);background:#fff}
.qr img{width:140px;height:140px;margin:0 auto 8px}
.form{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:32px}
.form h3{font-size:20px;margin-bottom:6px}
.form .hint{color:var(--muted);font-size:14px;margin-bottom:22px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:16px}
.field label{font-size:14px;font-weight:600;color:var(--ink)}
.field label i,.form .hint i{color:var(--accent);font-style:normal}
.field input,.field textarea{border:1px solid #cbd5e1;border-radius:8px;padding:11px 14px;font-size:15px;font-family:inherit;outline:0;transition:.2s;background:#fff;width:100%}
.field input:focus,.field textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(249,115,22,.15)}
.field textarea{min-height:130px;resize:vertical}
.hp{position:absolute;left:-9999px;opacity:0;height:0;overflow:hidden}
.alert{padding:14px 18px;border-radius:8px;margin-bottom:20px;font-size:14px}
.alert-ok{background:#ecfdf5;color:#065f46;border:1px solid #a7f3d0}
.alert-err{background:#fef2f2;color:#991b1b;border:1px solid #fecaca}
.map{margin-top:48px;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line)}
.map iframe{width:100%;height:420px;border:0;display:block}

/* misc */
.not-found{padding:120px 24px;text-align:center}
.not-found h1{font-size:72px;color:var(--navy);margin-bottom:8px}
.not-found p{margin-bottom:24px}

@media (max-width:1024px){
  .grid-4{grid-template-columns:repeat(3,1fr)}
  .adv-cards{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .stat:nth-child(2){border-right:0}
  .stat:nth-child(-n+2){border-bottom:1px solid var(--line)}
  .layout{grid-template-columns:1fr}
  .sidebar{position:static}
  .about-grid,.intro-grid,.contact-grid,.product-hero{grid-template-columns:1fr;gap:36px}
  .photo-grid.portrait{grid-template-columns:repeat(3,1fr)}
}
@media (max-width:768px){
  .section{padding:64px 0}
  .header-inner{height:66px;gap:16px}
  .nav-toggle{display:flex}
  .header-cta{display:none}
  .nav{display:none;position:absolute;left:0;right:0;top:66px;background:#fff;flex-direction:column;padding:12px 16px 18px;border-bottom:1px solid var(--line);box-shadow:var(--shadow)}
  .nav.open{display:flex}
  .nav a.active::after{display:none}
  .grid-4,.grid-3,.grid-2{grid-template-columns:repeat(2,1fr)}
  .grid{gap:16px}
  .photo-grid,.photo-grid.portrait{grid-template-columns:repeat(2,1fr)}
  .news-item{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
  .adv-list{grid-template-columns:1fr}
  .hero-inner{padding:80px 0 72px}
  .timeline{margin-left:64px}
  .timeline b{left:-78px;width:48px;font-size:14px}
  .form{padding:22px}
}
@media (max-width:480px){
  .grid-4,.grid-3,.grid-2{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:1fr}
  .stat{border-right:0;border-bottom:1px solid var(--line)}
  .adv-cards{grid-template-columns:1fr}
  .search{width:100%}
  .search input{min-width:0;width:100%}
  .hero-actions .btn{width:100%}
}
@media (max-width:1024px){.gallery{max-width:520px}}