/* ============================================================
   百杰科技 BaiJie Tech — v2 site stylesheet
   Light body + dark industrial header/footer, cyan-blue accent
   ============================================================ */
:root{
  --ink:#0d1526;
  --ink-2:#1a2540;
  --body:#42506a;
  --muted:#7b88a1;
  --bg:#ffffff;
  --bg-soft:#f4f7fb;
  --bg-dark:#0b1220;
  --bg-dark-2:#101b33;
  --line:#e4eaf3;
  --brand:#0a5ad6;
  --brand-dark:#0846a8;
  --cyan:#00b8d9;
  --orange:#f97316;
  --ok:#0e9f6e;
  --radius:14px;
  --radius-s:9px;
  --shadow:0 10px 30px rgba(13,21,38,.08);
  --shadow-l:0 24px 60px rgba(13,21,38,.16);
  --font:"PingFang SC","Microsoft YaHei","Segoe UI",system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--body);background:var(--bg);font-size:16px;line-height:1.7;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none}
a:hover{color:var(--brand-dark)}
h1,h2,h3,h4{color:var(--ink);line-height:1.3;font-weight:700}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
section{padding:78px 0}
.section-soft{background:var(--bg-soft)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--brand);margin-bottom:14px}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--cyan);border-radius:2px}
.sec-head{max-width:760px;margin-bottom:44px}
.sec-head h2{font-size:34px;margin-bottom:12px}
.sec-head p{color:var(--muted);font-size:16.5px}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center}
.sec-head.center .eyebrow::after{content:"";width:26px;height:2px;background:var(--cyan);border-radius:2px}
.more-link{font-weight:600;font-size:15px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 28px;border-radius:10px;font-weight:600;font-size:15.5px;border:1.5px solid transparent;cursor:pointer;transition:.2s;white-space:nowrap}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-dark);color:#fff;transform:translateY(-1px)}
.btn-ghost{border-color:var(--line);color:var(--ink);background:#fff}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn-orange{background:var(--orange);color:#fff}
.btn-orange:hover{background:#e35f00;color:#fff;transform:translateY(-1px)}
.btn-light{background:rgba(255,255,255,.12);color:#fff;border-color:rgba(255,255,255,.35)}
.btn-light:hover{background:rgba(255,255,255,.22);color:#fff}
.btn-sm{padding:9px 18px;font-size:14px;border-radius:8px}

/* ---------- header ---------- */
.topbar{background:var(--bg-dark);color:#aab6cf;font-size:13px;border-bottom:1px solid rgba(255,255,255,.07)}
.topbar .container{display:flex;justify-content:space-between;align-items:center;height:36px;gap:16px}
.topbar a{color:#d6deee}
.topbar .tb-right{display:flex;gap:18px;align-items:center}
header.site{position:sticky;top:0;z-index:200;background:rgba(11,18,32,.96);backdrop-filter:blur(10px);border-bottom:1px solid rgba(255,255,255,.08)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;height:70px;gap:20px}
.logo{display:flex;align-items:center;gap:12px;color:#fff}
.logo-img{height:46px;width:auto;display:block}
.logo-text b{font-size:19px;letter-spacing:.01em;display:block;line-height:1.2}
.logo-text small{display:block;font-size:10.5px;letter-spacing:.22em;color:#8fa0c0;text-transform:uppercase}
.logo-mark{width:42px;height:42px;border-radius:11px;background:linear-gradient(135deg,var(--brand),var(--cyan));display:flex;align-items:center;justify-content:center;font-weight:800;font-size:17px;color:#fff;letter-spacing:.02em}
.logo b{font-size:19px;letter-spacing:.01em;display:block;line-height:1.2}
.logo small{display:block;font-size:10.5px;letter-spacing:.22em;color:#8fa0c0;text-transform:uppercase}
nav.main{display:flex;align-items:center;gap:4px}
nav.main>a,nav.main .dd-label{display:flex;align-items:center;gap:5px;padding:9px 14px;border-radius:8px;color:#dbe3f2;font-size:15px;font-weight:500;cursor:pointer;transition:.15s;background:none;border:none;font-family:var(--font)}
nav.main>a:hover,nav.main .dd:hover .dd-label{background:rgba(255,255,255,.08);color:#fff}
nav.main>a.active,nav.main .dd-label.active{color:#fff;background:rgba(255,255,255,.1)}
.dd{position:relative}
.dd-menu{position:absolute;top:calc(100% + 8px);left:50%;transform:translateX(-50%) translateY(6px);background:#fff;border-radius:12px;box-shadow:var(--shadow-l);padding:10px;min-width:230px;opacity:0;visibility:hidden;transition:.18s}
.dd:hover .dd-menu,.dd:focus-within .dd-menu{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.dd-menu a{display:flex;justify-content:space-between;align-items:center;padding:10px 14px;border-radius:8px;color:var(--ink);font-size:14.5px;font-weight:500}
.dd-menu a:hover{background:var(--bg-soft);color:var(--brand)}
.dd-menu a small{color:var(--muted);font-weight:400}
.dd-menu .dd-group{padding:8px 14px 4px;font-size:11.5px;font-weight:700;letter-spacing:.12em;color:var(--muted);text-transform:uppercase}
.nav-cta{display:flex;align-items:center;gap:12px}
.lang-btn{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.25);color:#fff;padding:7px 14px;border-radius:8px;font-size:13.5px;font-weight:600;cursor:pointer;font-family:var(--font)}
.lang-btn:hover{background:rgba(255,255,255,.2)}
.hamburger{display:none;background:none;border:none;color:#fff;font-size:24px;cursor:pointer;padding:6px 10px}
.mobile-nav{display:none}

/* ---------- hero ---------- */
.hero{position:relative;background:radial-gradient(1100px 500px at 78% -10%,rgba(0,146,255,.28),transparent 60%),radial-gradient(800px 420px at 8% 110%,rgba(0,184,217,.16),transparent 55%),linear-gradient(160deg,#0b1220 15%,#0e1c3a 70%,#0b1526);color:#fff;padding:92px 0 96px;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);background-size:52px 52px;mask-image:radial-gradient(720px 460px at 70% 30%,#000 30%,transparent 75%)}
.hero .container{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero h1{color:#fff;font-size:44px;line-height:1.22;margin-bottom:18px}
.hero h1 em{font-style:normal;background:linear-gradient(90deg,#4db2ff,#00e0ff);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lead{color:#b9c6de;font-size:17.5px;margin-bottom:30px;max-width:560px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:34px}
.hero-points{display:flex;gap:26px;flex-wrap:wrap}
.hero-points span{display:flex;align-items:center;gap:8px;color:#c6d2e8;font-size:14px}
.hero-points svg{flex:none}
.hero-visual{position:relative}
.hero-visual img{border-radius:20px;box-shadow:0 30px 80px rgba(0,0,0,.35);border:1px solid rgba(255,255,255,.08)}
.hero-chip{position:absolute;background:rgba(13,22,42,.88);backdrop-filter:blur(8px);border:1px solid rgba(255,255,255,.16);border-radius:12px;padding:12px 18px;color:#fff;font-size:13px;line-height:1.45;box-shadow:var(--shadow-l)}
.hero-chip b{display:block;font-size:15px;color:#5ec8ff}
.hero-chip.c1{bottom:-22px;left:-26px}
.hero-chip.c2{top:-20px;right:-18px}

/* ---------- stats strip ---------- */
.stats{background:#fff;border-bottom:1px solid var(--line);padding:0}
.stats .container{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.stat{padding:34px 12px;text-align:center;border-left:1px solid var(--line)}
.stat:first-child{border-left:none}
.stat b{display:block;font-size:34px;color:var(--ink);font-weight:800}
.stat b em{font-style:normal;font-size:20px;color:var(--brand)}
.stat span{font-size:14px;color:var(--muted)}

/* ---------- cards ---------- */
.grid{display:grid;gap:24px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px;transition:.22s;position:relative}
.card:hover{box-shadow:var(--shadow-l);transform:translateY(-4px);border-color:#cfddF0}
.card h3{font-size:19px;margin-bottom:10px}
.card p{font-size:14.8px}
.ico{width:50px;height:50px;border-radius:12px;background:linear-gradient(135deg,rgba(10,90,214,.12),rgba(0,184,217,.14));color:var(--brand);display:flex;align-items:center;justify-content:center;margin-bottom:18px}
.ico svg{width:24px;height:24px}
.card .arrow{position:absolute;right:24px;bottom:24px;color:var(--brand);opacity:0;transition:.2s}
.card:hover .arrow{opacity:1;transform:translateX(4px)}

/* ---------- series feature split ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.split img{border-radius:var(--radius);box-shadow:var(--shadow)}
.split .kicker{font-size:13px;font-weight:700;letter-spacing:.12em;color:var(--brand);text-transform:uppercase;margin-bottom:10px}
.split h2{font-size:30px;margin-bottom:14px}
.checks{margin:20px 0 26px;display:grid;gap:11px}
.checks li{list-style:none;display:flex;gap:11px;font-size:15px;color:var(--body)}
.checks svg{flex:none;margin-top:4px}

/* ---------- product cards ---------- */
.p-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;transition:.22s;position:relative}
.p-card:hover{box-shadow:var(--shadow-l);transform:translateY(-4px)}
.p-media{background:linear-gradient(160deg,#f2f6fc,#e8eff9);padding:22px;display:flex;align-items:center;justify-content:center;height:210px}
.p-media img{max-height:170px;object-fit:contain;mix-blend-mode:multiply}
.p-badge{position:absolute;top:14px;left:14px;background:var(--ink);color:#fff;font-size:11.5px;font-weight:600;padding:4px 11px;border-radius:20px;letter-spacing:.04em}
.p-badge.hot{background:var(--orange)}
.p-body{padding:22px 24px 24px;display:flex;flex-direction:column;gap:10px;flex:1}
.p-body h3{font-size:17.5px}
.p-body h3 a{color:var(--ink)}
.p-body h3 a:hover{color:var(--brand)}
.p-tags{display:flex;flex-wrap:wrap;gap:7px}
.tag{font-size:11.8px;font-weight:600;color:var(--brand);background:rgba(10,90,214,.09);border:1px solid rgba(10,90,214,.18);padding:3px 10px;border-radius:20px}
.tag.t2{color:#0b8a9e;background:rgba(0,184,217,.09);border-color:rgba(0,184,217,.25)}
.p-specs{font-size:13.3px;color:var(--muted);display:grid;gap:5px;margin-top:2px}
.p-specs b{color:var(--body);font-weight:600}
.p-foot{margin-top:auto;padding-top:14px;display:flex;justify-content:space-between;align-items:center;border-top:1px dashed var(--line)}
.p-foot .more{font-size:14px;font-weight:600}

/* ---------- filter ---------- */
.filter-bar{position:relative;display:grid;grid-template-columns:1fr 1fr;gap:11px 30px;margin-bottom:34px;padding:20px 24px;border:1px solid var(--line);border-radius:var(--radius);background:var(--bg-soft)}
.filter-bar .f-row{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.filter-bar .f-label{width:64px;flex:none;font-size:13.5px;font-weight:700;color:var(--muted)}
.filter-bar .f-chips{display:flex;flex-wrap:wrap;gap:8px}
.filter-bar .f-count{position:absolute;right:24px;bottom:14px;font-size:13.5px;color:var(--muted);white-space:nowrap}
.filter-bar .f-count b{color:var(--ink);font-size:16px;margin-right:2px}
.chip{padding:7px 17px;border-radius:30px;border:1.5px solid var(--line);background:#fff;font-size:13.8px;font-weight:600;color:var(--body);cursor:pointer;transition:.15s;font-family:var(--font)}
.chip:hover{border-color:var(--brand);color:var(--brand)}
.chip.on,.chip.active{background:var(--ink);border-color:var(--ink);color:#fff}
.chip.f-off,.f-label.f-off{opacity:.32;pointer-events:none}
.empty-tip{padding:40px;text-align:center;color:var(--muted);border:1.5px dashed var(--line);border-radius:var(--radius);width:100%}
.f-count{margin-left:auto;font-size:13.5px;color:var(--muted);white-space:nowrap}
.acc-strip{display:flex;flex-wrap:wrap;gap:16px;justify-content:space-between;align-items:center;margin-top:34px;padding:20px 24px;border:1px solid var(--line);border-radius:var(--radius);background:var(--bg-soft)}
.acc-strip .as-txt{display:flex;flex-direction:column;gap:2px;font-size:14px;color:var(--muted)}
.acc-strip .as-txt b{font-size:16px;color:var(--ink)}
.acc-strip .as-links{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.acc-strip .as-links a:not(.btn){font-size:14px;font-weight:600;color:var(--body);padding:5px 12px;border-radius:20px;border:1px solid var(--line);background:#fff}
.acc-strip .as-links a:not(.btn):hover{color:var(--brand);border-color:var(--brand)}

/* ---------- tables ---------- */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:#fff;box-shadow:var(--shadow)}
table.spec{width:100%;border-collapse:collapse;font-size:14px;min-width:680px}
table.spec th,table.spec td{padding:13px 18px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
table.spec thead th{background:var(--bg-soft);color:var(--ink);font-size:13.5px;white-space:nowrap;position:sticky;top:0}
table.spec tbody th{background:var(--bg-soft);color:var(--ink);font-weight:600;white-space:nowrap;width:150px}
table.spec tr:last-child td,table.spec tr:last-child th{border-bottom:none}
table.spec td:first-child{font-weight:600;color:var(--ink);white-space:nowrap}
table.cmp td:not(:first-child),table.cmp th:not(:first-child){min-width:150px}
table.cmp tr.hl td{background:rgba(10,90,214,.05)}

/* ---------- page hero (subpages) ---------- */
.page-hero{background:radial-gradient(900px 380px at 85% -30%,rgba(0,146,255,.3),transparent 60%),linear-gradient(160deg,#0b1220,#0e1c3a 75%);color:#fff;padding:64px 0 58px}
.page-hero h1{color:#fff;font-size:36px;margin-bottom:10px}
.page-hero p{color:#a9b7d2;max-width:680px;font-size:16.5px}
.crumbs{font-size:13px;color:#8194b4;margin-bottom:18px}
.crumbs a{color:#c3cfe6}
.crumbs a:hover{color:#fff}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(6,1fr);gap:14px;counter-reset:step}
.step{background:#fff;border:1px solid var(--line);border-radius:var(--radius-s);padding:22px 16px;text-align:center;position:relative;transition:.2s}
.step:hover{border-color:var(--brand);box-shadow:var(--shadow)}
.step .num{width:38px;height:38px;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--cyan));color:#fff;font-weight:800;font-size:15px;display:flex;align-items:center;justify-content:center;margin:0 auto 12px}
.step b{display:block;color:var(--ink);font-size:14.5px;margin-bottom:4px}
.step small{font-size:12.3px;color:var(--muted);line-height:1.5;display:block}

/* ---------- solutions ---------- */
.sol-card{border-radius:var(--radius);overflow:hidden;position:relative;height:280px;display:flex;align-items:flex-end;color:#fff;box-shadow:var(--shadow)}
.sol-card img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:.4s}
.sol-card:hover img{transform:scale(1.05)}
.sol-card::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(9,15,30,.05) 30%,rgba(9,15,30,.86))}
.sol-body{position:relative;z-index:2;padding:24px}
.sol-body h3{color:#fff;font-size:19px;margin-bottom:6px}
.sol-body p{font-size:13.8px;color:#c9d4e8}

/* ---------- downloads ---------- */
.dl-card{display:flex;gap:16px;align-items:flex-start;background:#fff;border:1px solid var(--line);border-radius:var(--radius-s);padding:20px;transition:.2s}
.dl-card:hover{border-color:var(--brand);box-shadow:var(--shadow)}
.dl-ico{flex:none;width:44px;height:44px;border-radius:10px;background:rgba(10,90,214,.1);color:var(--brand);display:flex;align-items:center;justify-content:center}
.dl-card b{color:var(--ink);font-size:15px;display:block;margin-bottom:3px}
.dl-card small{color:var(--muted);font-size:13px;display:block;margin-bottom:8px}

/* ---------- FAQ ---------- */
.faq{max-width:860px;margin:0 auto}
.faq details{border:1px solid var(--line);border-radius:var(--radius-s);background:#fff;margin-bottom:12px;overflow:hidden}
.faq summary{cursor:pointer;padding:18px 22px;font-weight:600;color:var(--ink);font-size:15.5px;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:22px;color:var(--brand);font-weight:400;transition:.2s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details[open]{border-color:#c8d8f2;box-shadow:var(--shadow)}
.faq .faq-a{padding:0 22px 20px;font-size:14.8px}

/* ---------- CTA band ---------- */
.cta-band{background:radial-gradient(700px 300px at 20% -40%,rgba(0,184,217,.35),transparent 60%),linear-gradient(120deg,#0b1220,#122347);border-radius:20px;color:#fff;padding:54px 58px;display:flex;justify-content:space-between;align-items:center;gap:36px;flex-wrap:wrap;position:relative;overflow:hidden}
.cta-band::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:44px 44px;mask-image:radial-gradient(500px 300px at 80% 80%,#000,transparent 70%)}
.cta-band h2{color:#fff;font-size:28px;margin-bottom:8px;position:relative}
.cta-band p{color:#b4c2dc;position:relative}
.cta-band .btns{display:flex;gap:14px;position:relative;flex-wrap:wrap}

/* ---------- about ---------- */
.about-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:center}
.certs{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.cert{border:1.5px dashed var(--line);border-radius:var(--radius-s);padding:18px 10px;text-align:center;font-weight:700;color:var(--ink);font-size:15px;background:#fff}
.cert small{display:block;font-weight:400;color:var(--muted);font-size:12px;margin-top:3px}
.timeline{border-left:2px solid var(--line);margin-left:8px;padding-left:28px;display:grid;gap:26px}
.tl-item{position:relative}
.tl-item::before{content:"";position:absolute;left:-35px;top:7px;width:12px;height:12px;border-radius:50%;background:#fff;border:3px solid var(--brand)}
.tl-item b{color:var(--brand);font-size:15px;display:block;margin-bottom:3px}
.tl-item p{font-size:14.5px}

/* ---------- contact ---------- */
.contact-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:44px;align-items:start}
.info-item{display:flex;gap:16px;padding:18px 0;border-bottom:1px solid var(--line)}
.info-item:last-child{border-bottom:none}
.info-item .ico{margin:0;flex:none;width:44px;height:44px}
.info-item b{color:var(--ink);display:block;font-size:15px;margin-bottom:2px}
.info-item a,.info-item span.val{color:var(--body);font-size:15px}
.form-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:36px;box-shadow:var(--shadow)}
.form-card h3{font-size:21px;margin-bottom:6px}
.form-card>p{font-size:14px;color:var(--muted);margin-bottom:22px}
.f-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.f-group{margin-bottom:16px}
.f-group label{display:block;font-size:13.5px;font-weight:600;color:var(--ink);margin-bottom:6px}
.f-group input,.f-group select,.f-group textarea{width:100%;padding:12px 14px;border:1.5px solid var(--line);border-radius:9px;font-size:14.5px;font-family:var(--font);color:var(--ink);background:#fff;transition:.15s}
.f-group input:focus,.f-group select:focus,.f-group textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(10,90,214,.12)}
.form-note{font-size:12.5px;color:var(--muted);margin-top:12px}

/* ---------- product detail ---------- */
.pd-layout{display:grid;grid-template-columns:460px 1fr;gap:48px;align-items:start}
.pd-media{position:sticky;top:100px;background:linear-gradient(160deg,#f2f6fc,#e8eff9);border:1px solid var(--line);border-radius:var(--radius);padding:34px;display:flex;align-items:center;justify-content:center}
.pd-gallery{position:sticky;top:100px;background:linear-gradient(160deg,#f2f6fc,#e8eff9);border:1px solid var(--line);border-radius:var(--radius);padding:20px;display:flex;flex-direction:column}
.pd-stage{position:relative;display:flex;align-items:center;justify-content:center;min-height:320px;cursor:zoom-in}
.pd-stage img{max-width:100%;max-height:400px;mix-blend-mode:multiply}
.pd-thumbs{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:16px}
.pthumb{position:relative;border:2px solid var(--line);border-radius:10px;background:#fff;cursor:pointer;padding:0;overflow:hidden;transition:border-color .15s, box-shadow .15s}
.pthumb img{display:block;width:100%;height:60px;object-fit:cover}
.pthumb.on{border-color:var(--brand);box-shadow:0 0 0 3px rgba(10,90,214,.13)}
.pthumb i{position:absolute;left:5px;top:5px;font-size:10.5px;font-style:normal;line-height:1;padding:3px 7px;border-radius:99px;background:rgba(15,32,66,.74);color:#fff;letter-spacing:.5px}
.pd-media img{mix-blend-mode:multiply}
/* 图片放大镜 */
.pd-zoom{cursor:zoom-in}
.zoom-lens{position:absolute;width:230px;height:230px;border-radius:50%;pointer-events:none;display:none;z-index:60;
  background-repeat:no-repeat;background-color:#fff;
  border:2px solid rgba(10,90,214,.35);
  box-shadow:0 16px 44px rgba(13,38,76,.28), inset 0 0 0 1px rgba(255,255,255,.65)}
.zoom-hint{position:absolute;right:14px;bottom:14px;font-size:12px;color:var(--muted);background:rgba(255,255,255,.85);
  border:1px solid var(--line);border-radius:999px;padding:4px 12px;pointer-events:none;backdrop-filter:blur(4px)}
.pd-head .p-tags{margin-bottom:12px}
.pd-head h1{font-size:30px;margin-bottom:10px}
.pd-head .pd-sub{color:var(--muted);margin-bottom:20px}
.pd-key{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:18px 0 24px}
.pd-key div{background:var(--bg-soft);border-radius:var(--radius-s);padding:12px 16px;font-size:13.5px}
.pd-key b{display:block;color:var(--ink);font-size:14px}
.pd-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}
.pd-section{padding:56px 0}
.pd-section h2{font-size:26px;margin-bottom:26px}

/* ---------- news ---------- */
.news-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.22s;display:flex;flex-direction:column}
.news-card:hover{box-shadow:var(--shadow-l);transform:translateY(-4px)}
.news-body{padding:22px 24px 24px;flex:1;display:flex;flex-direction:column}
.news-date{font-size:12.5px;color:var(--muted);margin-bottom:8px;letter-spacing:.04em}
.news-body h3{font-size:16.5px;line-height:1.5;margin-bottom:10px}
.news-body p{font-size:13.8px;flex:1}

/* ---------- footer ---------- */
footer.site{background:var(--bg-dark);color:#9aa8c4;padding:64px 0 0;font-size:14px}
footer.site h4{color:#fff;font-size:15px;margin-bottom:18px;letter-spacing:.04em}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:44px;padding-bottom:48px}
.foot-brand .logo{margin-bottom:16px}
.foot-brand p{max-width:320px;line-height:1.75}
footer.site ul{list-style:none;display:grid;gap:10px}
footer.site ul a{color:#9aa8c4}
footer.site ul a:hover{color:#fff}
.foot-contact li{display:flex;gap:10px;align-items:flex-start}
.foot-bottom{border-top:1px solid rgba(255,255,255,.08);padding:20px 0;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;font-size:13px;color:#7385a6}
.foot-bottom a{color:#7385a6}

/* ---------- reveal animation ---------- */
.rv{opacity:0;transform:translateY(22px);transition:opacity .6s ease,transform .6s ease}
.rv.in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:1080px){
  .hero .container{grid-template-columns:1fr;gap:44px}
  .hero-visual{max-width:620px}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(3,1fr)}
  .pd-layout{grid-template-columns:1fr}
  .pd-media{position:static;max-width:560px}
  .pd-gallery{position:static;max-width:560px}
  .pd-thumbs{grid-template-columns:repeat(4,1fr)}
  .pd-stage img{max-height:300px}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:820px){
  section{padding:56px 0}
  nav.main{display:none}
  .hamburger{display:block}
  .mobile-nav{display:none;position:fixed;inset:106px 0 0 0;background:var(--bg-dark);z-index:190;padding:22px 26px;overflow-y:auto;flex-direction:column;gap:4px}
  .mobile-nav.open{display:flex}
  .mobile-nav a{color:#e2e9f5;font-size:16.5px;font-weight:600;padding:13px 4px;border-bottom:1px solid rgba(255,255,255,.08)}
  .mobile-nav a.m-sub{padding-left:22px;font-size:14.5px;font-weight:400;color:#aebad2}
  .mobile-nav .lang-btn{margin-top:16px;align-self:flex-start}
  .nav-cta .btn{display:none}
  .topbar .tb-right span{display:none}
  .grid-2,.grid-3{grid-template-columns:1fr}
  .split,.about-grid,.contact-grid{grid-template-columns:1fr;gap:36px}
  .stats .container{grid-template-columns:repeat(2,1fr)}
  .stat{border-left:none;border-bottom:1px solid var(--line)}
  .hero h1{font-size:33px}
  .sec-head h2{font-size:27px}
  .page-hero h1{font-size:29px}
  .steps{grid-template-columns:repeat(2,1fr)}
  .cta-band{padding:38px 28px}
  .f-row{grid-template-columns:1fr}
  .hero-chip{display:none}
}
@media (max-width:560px){
  .container{padding:0 18px}
  .topbar{display:none}
  .grid-4{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr}
  .certs{grid-template-columns:repeat(2,1fr)}
  .hero{padding:64px 0 70px}
  .pd-key{grid-template-columns:1fr}
  .logo small{display:none}
}

/* ================= v3 additions ================= */
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.flag-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:34px}
.flag-card{display:flex;flex-direction:column;gap:12px;padding:30px 28px;border-radius:var(--radius);
  background:linear-gradient(150deg,#0e1726,#13213a 55%,#0e1726);color:#fff;box-shadow:var(--shadow);
  border:1px solid rgba(255,255,255,.06);transition:transform .25s,box-shadow .25s}
.flag-card:hover{transform:translateY(-4px);box-shadow:0 18px 40px rgba(10,20,40,.25)}
.flag-eyebrow{font-size:12px;letter-spacing:.12em;color:#7fc4ff;text-transform:uppercase}
.flag-card b{font-size:20px;line-height:1.4;color:#fff}
.flag-card p{font-size:13.5px;color:rgba(255,255,255,.72);flex:1}
.flag-card .more-link{color:#7fc4ff}
.sp-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.sp-item{display:flex;gap:12px;align-items:flex-start;background:var(--bg-soft,#f4f7fb);
  border:1px solid var(--line,rgba(10,30,60,.08));border-radius:var(--radius);padding:18px}
.sp-item .ico{flex:none}
.sp-item b{display:block;font-size:14.5px;margin-bottom:4px}
.sp-item span{font-size:12.5px;color:var(--muted)}
.news-row{display:flex;gap:20px;align-items:center;padding:22px 26px}
.news-date{font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums;white-space:nowrap}
.news-row h3{font-size:16px;margin-top:6px}
@media (max-width:900px){.grid-4,.sp-grid,.flag-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:560px){.grid-4,.sp-grid,.flag-grid{grid-template-columns:1fr}
  .news-row{flex-direction:column;align-items:flex-start;gap:8px}}
.foot-contact .fc-label{color:#7385a6;flex:none}

/* ================= v3.2 创龙式产品页升级 ================= */
/* 吸顶锚点导航 */
.pd-nav{position:sticky;top:70px;z-index:90;background:rgba(255,255,255,.94);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);box-shadow:0 4px 16px rgba(13,38,76,.05)}
.pd-nav-in{display:flex;gap:2px;overflow-x:auto;scrollbar-width:none}
.pd-nav-in::-webkit-scrollbar{display:none}
.pd-nav a{flex:none;padding:15px 18px 13px;font-size:14px;font-weight:600;color:var(--muted);
  border-bottom:2.5px solid transparent;transition:color .15s,border-color .15s;white-space:nowrap}
.pd-nav a:hover{color:var(--brand)}
.pd-nav a.on{color:var(--brand);border-bottom-color:var(--brand)}
.pd-section,#pd-top{scroll-margin-top:142px}
@media (max-width:820px){.pd-nav{top:70px}.pd-section,#pd-top{scroll-margin-top:132px}}
/* 图库：淡入切换 + 左右箭头 */
.pd-stage img{transition:opacity .16s ease}
.pd-stage img.switching{opacity:0}
.gal-arrow{position:absolute;top:50%;transform:translateY(-50%);width:38px;height:38px;border-radius:50%;
  border:1px solid var(--line);background:rgba(255,255,255,.92);color:var(--ink);font-size:20px;line-height:1;
  cursor:pointer;opacity:0;transition:.18s;display:flex;align-items:center;justify-content:center;z-index:70;padding:0}
.gal-arrow.prev{left:12px}.gal-arrow.next{right:12px}
.pd-stage:hover .gal-arrow{opacity:1}
.gal-arrow:hover{background:var(--brand);border-color:var(--brand);color:#fff}
@media (hover:none){.gal-arrow{opacity:.85;width:34px;height:34px}}
.pthumb:hover{border-color:#9db9e6}
/* 卖点卡悬停 */
.sp-item{transition:transform .2s,box-shadow .2s,border-color .2s,background .2s}
.sp-item:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#c8d8f2;background:#fff}
/* 关键参数卡悬停 */
.pd-key div{transition:.18s;border:1px solid transparent;cursor:default}
.pd-key div:hover{border-color:#c8d8f2;background:#fff;box-shadow:var(--shadow);transform:translateY(-2px)}
/* 表格行悬停 */
table.spec tbody tr:hover td,table.spec tbody tr:hover th{background:rgba(10,90,214,.045)}
/* 产品列表卡片图片悬停放大 */
.p-media img{transition:transform .32s ease}
.p-card:hover .p-media img{transform:scale(1.06)}
.p-card .p-media{background:#fff;border-bottom:1px solid var(--line)}
.p-card .p-media img{max-height:186px;object-fit:contain;mix-blend-mode:normal}
/* 产品详情标题区更精致 */
.pd-head h1{font-size:32px;letter-spacing:-.01em}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.rv{transition:none}}
/* 右侧信任信息条 */
.pd-trust{margin-top:26px;padding-top:22px;border-top:1px solid var(--line);display:grid;gap:13px}
.pd-trust li{list-style:none;display:flex;align-items:flex-start;gap:10px;font-size:14px;color:var(--body);line-height:1.55}
.pd-trust svg{flex:none;color:var(--brand);margin-top:3px}

/* 筛选面板：窄屏单列 */
@media (max-width:820px){
  .filter-bar{grid-template-columns:1fr;gap:9px;padding:16px 16px}
  .filter-bar .f-label{width:56px;font-size:12.8px}
  .filter-bar .f-count{position:static;text-align:right;margin-top:2px}
  .chip{padding:6px 14px;font-size:13px}
}

/* ---------- 应用方案卡片 ---------- */
.sol-item{padding:0;overflow:hidden;display:flex;flex-direction:column}
.sol-img{height:198px;overflow:hidden;background:var(--bg-soft)}
.sol-img img{width:100%;height:100%;object-fit:cover;transition:transform .55s ease}
.sol-item:hover .sol-img img{transform:scale(1.055)}
.sol-txt{padding:20px 24px 22px;display:flex;flex-direction:column;gap:9px;flex:1}
.sol-title{display:flex;align-items:center;gap:11px}
.sol-title .ico{width:38px;height:38px;border-radius:10px;margin:0;flex:none}
.sol-title .ico svg{width:19px;height:19px}
.sol-title h3{font-size:18.5px;margin:0}
.sol-item p{font-size:13.8px;line-height:1.62;color:var(--muted)}
.sol-fit{display:flex;flex-wrap:wrap;gap:6px;align-items:center;margin-top:auto;padding-top:12px;border-top:1px dashed var(--line)}
.sol-fit .fit-label{font-size:12.5px;font-weight:700;color:var(--muted);margin-right:2px}
.sol-fit .tag{font-size:11.5px;padding:2px 9px}
.sol-cta{grid-column:span 2;border-radius:var(--radius);padding:34px 34px;background:linear-gradient(150deg,#0d1526 0%,#123b7a 65%,#0a5ad6 100%);color:#fff;display:flex;align-items:center;text-decoration:none;transition:.22s;position:relative;overflow:hidden}
.sol-cta::after{content:"";position:absolute;right:-40px;bottom:-60px;width:190px;height:190px;border-radius:50%;background:rgba(0,184,217,.22);filter:blur(6px)}
.sol-cta:hover{transform:translateY(-4px);box-shadow:var(--shadow-l);color:#fff}
.sol-cta .eyebrow{color:#8ec5ff;margin-bottom:10px}
.sol-cta .eyebrow::before{background:#8ec5ff}
.sol-cta h3{color:#fff;font-size:21px;margin-bottom:10px;line-height:1.35}
.sol-cta p{color:rgba(255,255,255,.74);font-size:14px;margin-bottom:18px}
.sol-cta .btn{position:relative;z-index:1}
.sol-cta>div{max-width:600px;position:relative;z-index:1}
@media (max-width:560px){.sol-img{height:170px}.sol-cta{grid-column:span 1;padding:26px 22px}}
.sol-card .sol-body p{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

/* 应用方案：参考说明 */
.sol-note{margin:22px 0 0;padding:14px 18px;border-left:3px solid var(--brand);background:var(--bg-soft);border-radius:0 10px 10px 0;font-size:13px;line-height:1.7;color:var(--muted)}

/* 定制能力：5 张卡片，最后一行居中 */
.caps-grid{display:flex;flex-wrap:wrap;gap:24px;justify-content:center}
.caps-grid>.card{flex:0 1 calc((100% - 48px)/3);min-width:0}
@media (max-width:1080px){.caps-grid>.card{flex:1 1 calc((100% - 24px)/2)}}
@media (max-width:640px){.caps-grid>.card{flex:1 1 100%}}