/* PanelLink — shared stylesheet
   Industrial smart-home B2B: navy + teal, 4px radius, no purple glass, no emoji */
:root{
  --navy:#0B1F33; --navy-2:#12304A; --steel:#5A6A75; --ink:#14212B;
  --line:#E1E6EA; --bg:#F4F6F8; --surface:#FFFFFF;
  --accent:#0D7A6F; --accent-hov:#0A635A; --ok:#1F7A4D; --soft:#E8F2F1;
  --r:4px; --maxw:1180px;
  --ff:-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei",Roboto,Arial,sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font-family:var(--ff);color:var(--ink);background:var(--bg);line-height:1.55;font-size:15px;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.section{padding:56px 0}
.section.alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.demo{background:#08141F;color:#9fb0bd;font-size:12px;text-align:center;padding:6px 12px}
.demo b{color:#8fd0c8}

.nav{position:sticky;top:0;z-index:50;background:var(--surface);border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;align-items:center;gap:22px;height:64px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:8px;font-weight:700;color:var(--navy);font-size:17px}
.brand svg{width:22px;height:22px;color:var(--accent)}
.menu{display:flex;gap:16px;font-size:13.5px;color:var(--steel);flex-wrap:wrap}
.menu a{padding:6px 0;border-bottom:2px solid transparent}
.menu a:hover,.menu a.on{color:var(--navy);border-color:var(--accent)}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.langsel{font-family:var(--ff);font-size:12px;color:var(--steel);background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:6px 6px;max-width:150px;cursor:pointer}
.langsel:hover{border-color:var(--accent);color:var(--navy)}
.langsel:focus{outline:1px solid var(--accent);outline-offset:0}

.btn{display:inline-flex;align-items:center;gap:6px;background:var(--accent);color:#fff;padding:9px 15px;border-radius:var(--r);font-size:13.5px;font-weight:600;border:none;cursor:pointer}
.btn:hover{background:var(--accent-hov)}
.btn.ghost{background:transparent;color:var(--navy);border:1px solid var(--navy)}
.btn.ghost:hover{background:var(--navy);color:#fff}
.btn.ghost.light{color:#fff;border-color:rgba(255,255,255,.55)}
.btn.sm{padding:6px 11px;font-size:12.5px}

.hero{background:var(--navy);color:#fff;padding:48px 0 0}
.hero .kicker{color:#8fd0c8;font-size:12.5px;font-weight:600;letter-spacing:.7px;text-transform:uppercase;margin-bottom:10px}
.hero h1{font-size:32px;line-height:1.2;margin:0 0 12px;font-weight:700;max-width:820px}
.hero p.lead{font-size:16px;color:#c3d2dd;max-width:720px;margin:0 0 22px}
.hero .anchors{display:flex;gap:12px;flex-wrap:wrap}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:34px;align-items:center}
@media(max-width:900px){.hero-grid{grid-template-columns:1fr;gap:24px}}
.hero-shot{border:1px solid rgba(255,255,255,.16);border-radius:var(--r);overflow:hidden;background:#12304A}
.hero-shot img{display:block;width:100%;aspect-ratio:3/2;object-fit:cover}
.hero-shot figcaption{font-size:11.5px;color:#8fa1ad;padding:7px 10px;border-top:1px solid rgba(255,255,255,.12)}
.statbar{margin-top:40px;background:var(--navy-2);border-top:1px solid rgba(255,255,255,.12)}
.statbar .wrap{display:flex;flex-wrap:wrap}
.stat{flex:1;min-width:140px;padding:18px 20px 18px 0;border-right:1px solid rgba(255,255,255,.1)}
.stat:last-child{border-right:0}
.stat b{display:block;font-size:22px}
.stat span{font-size:12px;color:#9fb3c2}

.pagehead{background:var(--navy);color:#fff;padding:36px 0 30px}
.pagehead .kicker{color:#8fd0c8;font-size:12px;font-weight:600;letter-spacing:.7px;text-transform:uppercase}
.pagehead h1{font-size:26px;margin:6px 0 8px}
.pagehead p{color:#c3d2dd;max-width:760px;margin:0}
.breadcrumb{font-size:12.5px;color:#9fb3c2;margin-bottom:12px}
.breadcrumb a:hover{color:#fff}
.breadcrumb span{margin:0 6px;color:#5b6f7d}

.sec-head{margin-bottom:24px;max-width:820px}
.sec-head .kicker{color:var(--accent);font-size:12px;font-weight:600;letter-spacing:.7px;text-transform:uppercase}
.sec-head h2{font-size:24px;margin:6px 0 8px;color:var(--navy)}
.sec-head p{color:var(--steel);margin:0}

.grid{display:grid;gap:16px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
@media(max-width:980px){.g4,.g3{grid-template-columns:1fr 1fr}.g2{grid-template-columns:1fr}}
@media(max-width:640px){.g4,.g3{grid-template-columns:1fr}}

.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:20px}
.card .ic{width:32px;height:32px;color:var(--navy);margin-bottom:12px}
.card h3{margin:0 0 6px;font-size:15.5px;color:var(--navy)}
.card p{margin:0;color:var(--steel);font-size:13.5px}
.card.anchor{border-top:3px solid var(--accent)}
.tag{display:inline-block;font-size:10.5px;font-weight:600;color:var(--accent);background:var(--soft);padding:2px 7px;border-radius:3px;margin-top:10px;letter-spacing:.3px}
.tag.val{background:#e8eef3;color:#1c5a86}

.pgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
@media(max-width:900px){.pgrid{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.pgrid{grid-template-columns:1fr}}
.pcard{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;display:flex;flex-direction:column}
.pcard .pth{background:var(--soft);border-bottom:1px solid var(--line);min-height:130px;display:flex;align-items:center;justify-content:center;color:#8aa}
.pcard .pth svg{width:64px;height:64px}
.pcard .pbody{padding:14px 15px;display:flex;flex-direction:column;gap:5px;flex:1}
.pcard .cat{font-size:11px;color:var(--accent);font-weight:600;text-transform:uppercase}
.pcard h3{margin:0;font-size:14.5px;color:var(--navy)}
.pcard .sku{font-size:11.5px;color:var(--steel)}
.pcard .pmeta{font-size:12.5px;color:var(--steel)}
.pcard .pmeta b{color:var(--ink)}
.pcard .pfoot{margin-top:auto;padding-top:10px;display:flex;justify-content:space-between;align-items:center}

.detail-top{display:grid;grid-template-columns:1fr 1fr;gap:26px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:24px}
@media(max-width:860px){.detail-top{grid-template-columns:1fr}}
.gallery .main{background:var(--soft);border:1px solid var(--line);border-radius:var(--r);min-height:300px;display:flex;align-items:center;justify-content:center;color:#8aa}
.gallery .main svg{width:140px;height:140px}
.detail-info h1{margin:0 0 4px;font-size:20px;color:var(--navy)}
.detail-info .sku{color:var(--steel);font-size:13px;margin-bottom:12px}
.spec{width:100%;border-collapse:collapse;font-size:13.5px}
.spec th,.spec td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--line)}
.spec th{color:var(--steel);font-weight:500;width:40%}
.badges{display:flex;gap:6px;flex-wrap:wrap;margin-top:12px}
.badges span{font-size:11px;color:var(--ok);background:#eaf5ee;border:1px solid #cfe6d8;padding:3px 7px;border-radius:3px}

.chips{display:flex;gap:6px;flex-wrap:wrap}
.chips span{font-size:11px;color:var(--steel);background:var(--soft);border:1px solid var(--line);padding:2px 7px;border-radius:3px}
.sol a.more{display:inline-flex;color:var(--accent);font-size:13px;font-weight:600;margin-top:12px}

.certwall{display:flex;flex-wrap:wrap;gap:8px}
.cert{display:inline-flex;align-items:center;gap:6px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:8px 12px;font-size:13px;color:var(--navy);font-weight:600}
.cert svg{width:15px;height:15px;color:var(--ok)}
.cert-table{width:100%;border-collapse:collapse;font-size:13.5px;background:var(--surface);border:1px solid var(--line)}
.cert-table th,.cert-table td{padding:10px 12px;border-bottom:1px solid var(--line);text-align:left}
.cert-table th{background:var(--soft);color:var(--navy)}

.rfq{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:26px}
.rfq .fields{display:grid;grid-template-columns:1fr 1fr 1fr;gap:12px}
@media(max-width:860px){.rfq .fields{grid-template-columns:1fr}}
.rfq .full{grid-column:1/-1}
.rfq label{display:block;font-size:12px;color:var(--steel);margin-bottom:4px}
.rfq input,.rfq select,.rfq textarea{width:100%;padding:8px 10px;border:1px solid var(--line);border-radius:var(--r);font-size:14px;font-family:var(--ff)}
.rfq textarea{min-height:88px;resize:vertical}
.rfq .note{font-size:12px;color:var(--steel);margin-top:10px}

.layout{display:grid;grid-template-columns:220px 1fr;gap:22px}
@media(max-width:880px){.layout{grid-template-columns:1fr}}
.sidebar{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:16px;position:sticky;top:80px;height:fit-content}
.sidebar h4{margin:0 0 10px;font-size:12px;color:var(--navy);text-transform:uppercase;letter-spacing:.4px}
.filter-group{margin-bottom:14px}
.filter-group .opt{display:flex;align-items:center;gap:7px;font-size:13px;color:var(--steel);padding:3px 0}

footer{background:var(--navy);color:#c3d2dd;padding:44px 0 26px;font-size:13px}
footer .g4{grid-template-columns:1.4fr 1fr 1fr 1fr}
footer h5{color:#fff;font-size:13.5px;margin:0 0 10px}
footer a{display:block;color:#a9bcc7;padding:3px 0}
footer a:hover{color:#fff}
.foot-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:28px;padding-top:16px;font-size:11.5px;color:#8fa1ad;display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}

.locale-note{background:var(--soft);border:1px solid var(--line);border-radius:var(--r);padding:14px 16px;font-size:13.5px;color:var(--steel);margin-bottom:20px}
.locale-note b{color:var(--navy)}

/* product detail extras */
.gallery .thumbs{display:flex;gap:8px;margin-top:10px}
.gallery .thumbs button,.gallery .thumbs .thumb{width:64px;height:64px;border:1px solid var(--line);border-radius:var(--r);background:var(--soft);display:flex;align-items:center;justify-content:center;color:#8aa;cursor:default;padding:0}
.gallery .thumbs .thumb.on{border-color:var(--accent)}
.gallery .thumbs svg{width:28px;height:28px}
.qtybar{display:flex;gap:10px;align-items:center;margin-top:16px;padding-top:16px;border-top:1px solid var(--line);flex-wrap:wrap}
.tabs{display:flex;gap:4px;border-bottom:1px solid var(--line);margin:28px 0 0;flex-wrap:wrap}
.tabs a,.tabs span{padding:10px 14px;font-size:13.5px;color:var(--steel);border-bottom:2px solid transparent;display:inline-block}
.tabs a.on,.tabs span.on{color:var(--navy);border-color:var(--accent);font-weight:600}
.tabblock{background:var(--surface);border:1px solid var(--line);border-top:0;border-radius:0 0 var(--r) var(--r);padding:22px 24px}
.tabblock h3{color:var(--navy);margin:0 0 10px;font-size:16px}
.tabblock h4{color:var(--navy);margin:18px 0 8px;font-size:14.5px}
.tabblock p,.tabblock li{color:var(--steel);font-size:14px;line-height:1.6}
.tabblock ul{margin:0 0 12px;padding-left:18px}
.tabblock .callout{background:var(--soft);border-left:3px solid var(--accent);padding:12px 14px;margin:12px 0;font-size:13.5px;color:var(--steel)}
.faq-item{border:1px solid var(--line);border-radius:var(--r);margin-bottom:8px;background:#fff}
.faq-item summary{padding:12px 14px;font-weight:600;color:var(--navy);cursor:pointer;list-style:none}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item .fa{padding:0 14px 12px;color:var(--steel);font-size:13.5px}
.xsell{margin-top:28px}
.xsell .pgrid{grid-template-columns:repeat(4,1fr)}
@media(max-width:900px){.xsell .pgrid{grid-template-columns:1fr 1fr}}

/* news */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
@media(max-width:900px){.news-grid{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.news-grid{grid-template-columns:1fr}}
.post-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;display:flex;flex-direction:column}
.post-card .pth{background:var(--soft);border-bottom:1px solid var(--line);min-height:120px;display:flex;align-items:center;justify-content:center;color:#8aa}
.post-card .pth svg{width:48px;height:48px}
.post-card .pbody{padding:14px 16px;display:flex;flex-direction:column;gap:6px;flex:1}
.post-cat{font-size:11px;font-weight:600;color:var(--accent);text-transform:uppercase;letter-spacing:.3px}
.post-card h3{margin:0;font-size:15px;color:var(--navy);line-height:1.35}
.post-card p{margin:0;font-size:13px;color:var(--steel)}
.post-meta{margin-top:auto;font-size:12px;color:#8a98a3;padding-top:8px;border-top:1px solid var(--line)}
.filterbar{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:20px}
.filterbar a,.filterbar span{font-size:12.5px;color:var(--steel);padding:5px 12px;border:1px solid var(--line);border-radius:var(--r)}
.filterbar a.on,.filterbar span.on{background:var(--navy);color:#fff;border-color:var(--navy)}

/* article page */
.article-wrap{max-width:720px;margin:0 auto}
.article-wrap h2{font-size:20px;color:var(--navy);margin:28px 0 10px}
.article-wrap h3{font-size:16px;color:var(--navy);margin:20px 0 8px}
.article-wrap p{color:var(--steel);margin:0 0 12px;line-height:1.7}
.article-wrap ul,.article-wrap ol{color:var(--steel);margin:0 0 14px;padding-left:20px;line-height:1.65}
.article-wrap li{margin-bottom:6px}
.article-meta-row{display:flex;gap:12px;flex-wrap:wrap;font-size:12.5px;color:#8a98a3;margin-bottom:20px;padding-bottom:14px;border-bottom:1px solid var(--line)}
.article-meta-row .cat{color:var(--accent);font-weight:600;text-transform:uppercase}
.article-cta{background:var(--soft);border:1px solid var(--line);border-radius:var(--r);padding:20px;margin-top:28px}
.article-cta h3{margin:0 0 6px;color:var(--navy)}
.related-posts{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:24px}
@media(max-width:640px){.related-posts{grid-template-columns:1fr}}
.related-posts a{display:block;border:1px solid var(--line);border-radius:var(--r);padding:14px;background:#fff}
.related-posts a:hover{border-color:var(--accent)}
.related-posts .rc{font-size:11px;color:var(--accent);font-weight:600}
.related-posts h5{margin:4px 0 0;font-size:14px;color:var(--navy)}

/* imagery — sample product / scene photography (see 数据底稿.md §11) */
.card .sth{margin:-20px -20px 14px;border-bottom:1px solid var(--line);overflow:hidden;background:#f1f3f5}
.card .sth img{display:block;width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--r) var(--r) 0 0}
.pcard .pth,.post-card .pth{padding:0;overflow:hidden;min-height:0}
.pcard .pth img{display:block;width:100%;aspect-ratio:4/3;object-fit:cover;background:#f1f3f5}
.post-card .pth img{display:block;width:100%;aspect-ratio:3/2;object-fit:cover;background:#f1f3f5}
.gallery .main{padding:0;overflow:hidden;min-height:0}
.gallery .main img{display:block;width:100%;aspect-ratio:4/3;object-fit:cover;background:#f1f3f5}
.gallery .thumbs .thumb{overflow:hidden;padding:0}
.gallery .thumbs .thumb img{display:block;width:100%;height:100%;object-fit:cover}
.article-lead{margin:0 0 18px}
.article-lead img{display:block;width:100%;aspect-ratio:3/2;object-fit:cover;border:1px solid var(--line);border-radius:var(--r);background:#f1f3f5}
.article-lead figcaption{font-size:11.5px;color:#8a98a3;margin-top:6px}
.imgnote{font-size:11.5px;color:#8a98a3;margin-top:8px}

/* WhatsApp float — sits above all pages, links to wa.me (see 数据底稿.md §8) */
.wa-float{position:fixed;right:18px;bottom:18px;z-index:60;width:48px;height:48px;display:flex;align-items:center;justify-content:center;background:#25D366;color:#fff;border-radius:var(--r);box-shadow:0 2px 8px rgba(11,31,51,.25)}
.wa-float:hover{background:#1BA855}
.wa-float svg{width:24px;height:24px}
@media print{.wa-float{display:none}}