:root{
  --navy:#0d2b45; --navy-2:#16405f; --navy-3:#1f5a82;
  --orange:#c25a10; --orange-d:#a34a0b;
  --ink:#1a222b; --text:#33414f; --muted:#5f6c79; --line:#e2e6ea;
  --bg:#ffffff; --bg-2:#f6f8fa; --bg-3:#eef2f5;
  --radius:6px; --max:1200px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  color:var(--ink); background:var(--bg); line-height:1.65; font-size:15px;
  -webkit-font-smoothing:antialiased; overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}

/* ---------- focus（键盘无障碍） ---------- */
a:focus-visible,button:focus-visible,summary:focus-visible{
  outline:2px solid var(--orange);outline-offset:2px;border-radius:3px
}
.hdr a:focus-visible,.hdr button:focus-visible,.ft a:focus-visible,.mnav a:focus-visible{
  outline-color:#fff
}

/* ---------- header ---------- */
.hdr{position:sticky;top:0;z-index:50;background:var(--navy);color:#fff;border-bottom:1px solid rgba(255,255,255,.08)}
.hdr-in{display:flex;align-items:center;justify-content:space-between;height:66px;gap:20px}
.logo{display:flex;align-items:center;gap:9px;font-weight:700;font-size:17px;letter-spacing:.2px}
.logo-mark{height:40px;width:auto;display:block}
.logo-text{display:flex;flex-direction:column;line-height:1.08}
.logo-text b{font-size:16px;font-weight:800;letter-spacing:.2px;color:#fff}
.logo-text i{font-size:9.5px;font-style:normal;letter-spacing:.7px;text-transform:uppercase;color:rgba(255,255,255,.6)}
.nav{display:flex;gap:26px;font-size:14px}
.nav a{color:rgba(255,255,255,.82);padding:6px 0;border-bottom:2px solid transparent;transition:.16s}
.nav a:hover,.nav a.on{color:#fff;border-bottom-color:var(--orange)}
.hdr-cta{display:flex;align-items:center;gap:12px}
.wa-btn{display:inline-flex;align-items:center;gap:6px;font-size:13px;color:rgba(255,255,255,.85);border:1px solid rgba(255,255,255,.25);padding:7px 12px;border-radius:var(--radius)}
.wa-btn:hover{border-color:var(--orange);color:#fff}
.lang{display:inline-flex;align-items:center;font-size:12.5px;font-weight:600;letter-spacing:.3px;color:rgba(255,255,255,.9);border:1px solid rgba(255,255,255,.25);padding:7px 11px;border-radius:var(--radius);white-space:nowrap;transition:.16s}
.lang:hover{border-color:var(--orange);color:#fff}
.btn{display:inline-block;background:var(--orange);color:#fff;padding:10px 18px;border-radius:var(--radius);font-weight:600;font-size:14px;border:0;cursor:pointer;transition:.16s}
.btn:hover{background:var(--orange-d)}
.btn-ghost{background:transparent;border:1.5px solid rgba(255,255,255,.5);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.1);border-color:#fff}
.btn-lg{padding:13px 26px;font-size:15px}
.burger{display:none;background:none;border:0;color:#fff;font-size:22px;cursor:pointer}
.mnav{display:none}
.mnav.open{display:flex;flex-direction:column;position:fixed;top:66px;left:0;right:0;bottom:0;
  background:var(--navy);z-index:60;padding:8px 20px 30px;overflow-y:auto}
.mnav a{color:#fff;font-size:17px;padding:17px 2px;border-bottom:1px solid rgba(255,255,255,.12)}
.mnav a:last-of-type{border-bottom:0}
.mnav .mnav-cta{margin-top:22px;text-align:center;background:var(--orange);border-radius:var(--radius);
  font-weight:600;border-bottom:0;padding:15px 2px}

/* ---------- hero ---------- */
.hero{background:linear-gradient(135deg,var(--navy) 0%,var(--navy-3) 100%);color:#fff;padding:78px 0 70px;position:relative;overflow:hidden}
.hero:after{content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;border:60px solid rgba(255,255,255,.04);border-radius:50%}
.hero-in{position:relative;z-index:1;max-width:720px}
.hero h1{font-size:44px;line-height:1.22;font-weight:700;margin-bottom:18px;letter-spacing:-.5px}
.hero p.sub{font-size:17px;color:rgba(255,255,255,.86);margin-bottom:28px}
.hero .btns{display:flex;gap:12px;flex-wrap:wrap}

/* ---------- stats ---------- */
.stats{background:var(--bg-2);border-bottom:1px solid var(--line)}
.stats-in{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;padding:26px 0}
.stat{text-align:center}
.stat b{display:block;font-size:26px;color:var(--navy);font-weight:700;letter-spacing:-.5px}
.stat span{font-size:13px;color:var(--muted)}

/* ---------- section ---------- */
.sec{padding:60px 0}
.sec.alt{background:var(--bg-2)}
.sec-hd{margin-bottom:32px}
.sec-hd h2{font-size:26px;font-weight:700;color:var(--navy);letter-spacing:-.3px}
.sec-hd p{color:var(--muted);margin-top:8px;max-width:680px}
.eyebrow{display:inline-block;font-size:12px;font-weight:700;letter-spacing:1.2px;color:var(--orange);text-transform:uppercase;margin-bottom:10px}

/* ---------- product grid ---------- */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.grid.g4{grid-template-columns:repeat(4,1fr)}
.card{border:1px solid var(--line);border-radius:8px;overflow:hidden;background:#fff;transition:.18s;display:flex;flex-direction:column}
.card:hover{transform:translateY(-3px);box-shadow:0 10px 26px rgba(13,43,69,.11);border-color:#cfd8e0}
.card:active{transform:translateY(-1px);box-shadow:0 5px 14px rgba(13,43,69,.14)}
/* 触屏设备：去掉无效的 hover 位移，改用按下反馈 */
@media (hover:none){
  .card:hover{transform:none;box-shadow:none;border-color:var(--line)}
  .card:active{transform:scale(.985);border-color:#cfd8e0;box-shadow:0 6px 16px rgba(13,43,69,.12)}
  .btn:active,.wa-btn:active,.chip:active,.btn-ghost:active{opacity:.82}
  .btn:hover,.wa-btn:hover,.chip:hover,.btn-ghost:hover{background:var(--orange)}
  .btn-ghost:hover{background:transparent;border-color:rgba(255,255,255,.5)}
  .chip:hover{border-color:#cfd8e0;color:var(--navy);background:transparent}
}
.card .ph{
  height:158px;display:grid;place-items:center;border-bottom:1px solid var(--line);
  background-color:#eef2f6;
  background-image:linear-gradient(#e1e8ef 1px,transparent 1px),linear-gradient(90deg,#e1e8ef 1px,transparent 1px);
  background-size:20px 20px;
}
.card .ph span{
  font-size:14px;font-weight:600;letter-spacing:2px;color:#8b99a7;
  background:rgba(255,255,255,.85);border:1px solid #dbe3ea;border-radius:4px;padding:6px 14px;
}
.card .bd{padding:16px 16px 18px;flex:1;display:flex;flex-direction:column}
.card h3{font-size:15px;font-weight:600;color:var(--navy);margin-bottom:7px}
.card p{font-size:13.5px;color:var(--text);flex:1;line-height:1.6}
.card .more{margin-top:12px;font-size:13px;color:var(--orange);font-weight:600}
.card .models{margin-top:12px;font-size:12px;color:#8b99a7;letter-spacing:.2px;line-height:1.55}
.tag{display:inline-block;font-size:11px;background:#fdf1e7;color:var(--orange-d);padding:2px 8px;border-radius:3px;margin-bottom:8px;font-weight:600}
.tag.pending{background:#f0f2f4;color:#7b8894}

/* ---------- table ---------- */
.tbl-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:8px;background:#fff}
.tbl-wrap.narrow{max-width:660px}
table.spec{width:100%;border-collapse:collapse;font-size:13.5px;min-width:560px}
table.spec th,table.spec td{padding:11px 14px;border-bottom:1px solid var(--line);text-align:left}
table.spec thead th{background:var(--navy);color:#fff;font-weight:600;font-size:13px;white-space:nowrap}
table.spec thead th.hl{background:var(--orange)}
table.spec tbody tr:nth-child(even){background:var(--bg-2)}
table.spec td:first-child{color:var(--muted);width:38%}
table.spec td.hl{background:#fdf1e7;color:var(--orange-d);font-weight:700}
table.spec tr:last-child td{border-bottom:0}

/* ---------- product page ---------- */
.crumb{font-size:12.5px;color:var(--muted);padding:16px 0}
.crumb a:hover{color:var(--orange)}
.phead{display:grid;grid-template-columns:1.05fr 1fr;gap:38px;padding-bottom:36px}
.phead .ph{
  border:1px solid var(--line);border-radius:8px;min-height:380px;display:grid;place-items:center;
  background-color:#eef2f6;
  background-image:linear-gradient(#e1e8ef 1px,transparent 1px),linear-gradient(90deg,#e1e8ef 1px,transparent 1px);
  background-size:24px 24px;
}
.phead .ph span{
  font-size:16px;font-weight:600;letter-spacing:2px;color:#8b99a7;
  background:rgba(255,255,255,.85);border:1px solid #dbe3ea;border-radius:4px;padding:9px 20px;
}
.phead h1{font-size:29px;color:var(--navy);font-weight:700;line-height:1.25;margin-bottom:12px;letter-spacing:-.3px}
.phead .lead{color:var(--muted);font-size:15px;margin-bottom:20px}
.keyfacts{display:flex;gap:26px;flex-wrap:wrap;margin-bottom:24px;padding:16px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.kf b{display:block;font-size:19px;color:var(--navy);font-weight:700}
.kf span{font-size:12px;color:var(--muted)}
.cta-row{display:flex;gap:12px;flex-wrap:wrap}

.blk{padding:34px 0;border-top:1px solid var(--line)}
.blk h2{font-size:20px;color:var(--navy);font-weight:700;margin-bottom:16px}
.blk ul.ticks li{position:relative;padding-left:22px;margin-bottom:9px;color:var(--text)}
.blk ul.ticks li:before{content:"";position:absolute;left:0;top:8px;width:8px;height:8px;background:var(--orange);border-radius:2px}
.two{display:grid;grid-template-columns:1fr 1fr;gap:36px}

/* ---------- form ---------- */
.form{background:#fff;border:1px solid var(--line);border-radius:10px;padding:26px;box-shadow:0 6px 20px rgba(13,43,69,.05)}
.form h3{font-size:18px;color:var(--navy);margin-bottom:6px}
.form p.hint{font-size:13px;color:var(--muted);margin-bottom:18px}
.fld{margin-bottom:14px}
.fld label{display:block;font-size:12.5px;color:var(--muted);margin-bottom:5px;font-weight:600}
.fld input,.fld select,.fld textarea{
  width:100%;padding:10px 12px;border:1px solid #ccd5dd;border-radius:var(--radius);
  font-size:14px;font-family:inherit;color:var(--ink);background:#fff;transition:.15s
}
.fld input:focus,.fld select:focus,.fld textarea:focus{outline:0;border-color:var(--navy-3);box-shadow:0 0 0 3px rgba(31,90,130,.1)}
.fld textarea{resize:vertical;min-height:88px}
.form .btn{width:100%;padding:12px;font-size:15px}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.form-msg{display:none;margin-top:12px;font-size:13.5px;border-radius:6px;padding:10px 12px;line-height:1.55}
.form-msg.ok{display:block;color:#0f6e56;background:#e1f5ee;border:1px solid #9fe1cb}
.form-msg.err{display:block;color:#8a2b2b;background:#fdeaea;border:1px solid #f0b4b4}

/* ---------- solutions ---------- */
.grid.sol-grid{grid-template-columns:repeat(2,1fr)}
.card.sol .bd{padding:24px}
.card.sol h3{font-size:17px;margin-bottom:10px}
.card.sol ul.ticks{margin-top:14px}
.card.sol ul.ticks li{font-size:13.5px;margin-bottom:7px;color:var(--text)}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.chip{display:inline-block;font-size:12.5px;font-weight:600;color:var(--navy);
  border:1px solid #cfd8e0;border-radius:4px;padding:5px 11px;transition:.15s}
.chip:hover{border-color:var(--orange);color:var(--orange);background:#fffaf6}

/* ---------- faq ---------- */
.faq-wrap{max-width:860px;margin:0 auto}
.faq-g{margin-bottom:34px}
.faq-g h3{font-size:17px;color:var(--navy);margin-bottom:12px;padding-bottom:10px;
  border-bottom:2px solid var(--line)}
details{border:1px solid var(--line);border-radius:6px;background:#fff;margin-bottom:8px}
details[open]{border-color:#c6d1da}
summary{cursor:pointer;padding:14px 42px 14px 16px;font-size:14.5px;font-weight:600;
  color:var(--navy);list-style:none;position:relative}
summary::-webkit-details-marker{display:none}
summary:after{content:"+";position:absolute;right:16px;top:50%;transform:translateY(-50%);
  font-size:18px;color:var(--orange);font-weight:400;line-height:1}
details[open] summary:after{content:"\2013"}
.ans{padding:0 16px 16px;font-size:14px;color:var(--text);line-height:1.72}

/* ---------- footer ---------- */
.ft{background:var(--navy);color:rgba(255,255,255,.72);padding:46px 0 24px;font-size:13.5px}
.ft-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:32px;padding-bottom:28px;border-bottom:1px solid rgba(255,255,255,.12)}
.ft h4{color:#fff;font-size:14px;margin-bottom:12px;font-weight:600}
.ft a:hover{color:var(--orange)}
.ft li{margin-bottom:7px}
.ft .bot{padding-top:18px;font-size:12.5px;color:rgba(255,255,255,.5);display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}

/* ---------- 悬浮 WhatsApp（非洲/移动端主询盘通道） ---------- */
.wa-float{
  position:fixed;right:18px;bottom:18px;z-index:40;
  display:inline-flex;align-items:center;gap:9px;
  background:#25d366;color:#fff;font-size:14px;font-weight:600;
  padding:12px 20px;border-radius:999px;
  box-shadow:0 6px 20px rgba(37,211,102,.45);transition:.16s
}
.wa-float:hover{background:#1eb955;transform:translateY(-2px)}
.wa-float:active{transform:translateY(0) scale(.98)}
.wa-float svg{width:21px;height:21px;fill:currentColor;flex-shrink:0}

/* ---------- notice ---------- */
.notice{background:#fff8ee;border-left:3px solid var(--orange);padding:12px 16px;font-size:13px;color:#7a5320;border-radius:0 6px 6px 0}

/* ---------- responsive ---------- */
@media (max-width:980px){
  .grid,.grid.g4{grid-template-columns:repeat(2,1fr)}
  .phead{grid-template-columns:1fr;gap:24px}
  .two{grid-template-columns:1fr;gap:24px}
  .stats-in{grid-template-columns:repeat(2,1fr);gap:24px}
  .ft-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:720px){
  .nav,.hdr-cta .wa-btn,.hdr-cta .btn{display:none}
  .burger{display:block}
  .wrap{padding:0 16px}
  .logo-mark{height:32px}
  .logo-text b{font-size:14.5px}
  .logo-text i{font-size:8.5px}
  .hero h1{font-size:27px}
  .hero{padding:52px 0 46px}
  .sec{padding:42px 0}
  .grid,.grid.g4,.grid.sol-grid{grid-template-columns:1fr}
  .ft-grid{grid-template-columns:1fr}
  .phead .ph{min-height:250px}
  /* 对比表横向滚动时，参数名列固定不离屏 */
  table.spec td:first-child,table.spec th:first-child{
    position:sticky;left:0;z-index:2;background:#fff
  }
  table.spec tbody tr:nth-child(even) td:first-child{background:var(--bg-2)}
  table.spec thead th:first-child{background:var(--navy);z-index:3}
  table.spec td:first-child{width:auto;min-width:124px;padding-right:10px}
  /* 两列的单型号参数表本就不宽，窄屏取消最小宽度、直接自适应 */
  .tbl-wrap.narrow table.spec{min-width:100%}
  .wa-float{right:14px;bottom:14px;font-size:13.5px;padding:11px 17px}
}

/* ---------- 打印（客户打印产品页带走） ---------- */
@media print{
  .hdr,.mnav,.wa-float,.stats,.hero .btns,.cta-row,.form,.notice,
  .sec-hd .eyebrow,.card .ph,.phead .ph{display:none!important}
  body{font-size:11pt;color:#000;background:#fff;line-height:1.5}
  .wrap{max-width:none;padding:0}
  .hero{background:none!important;color:#000;padding:0 0 10pt}
  .hero:after{display:none}
  .hero h1,.hero p.sub{color:#000!important}
  .sec,.blk{padding:9pt 0}
  .blk,.card,table.spec tr{page-break-inside:avoid}
  .sec.alt,.card .ph{background:none!important}
  .grid,.grid.g4,.two,.phead{display:block}
  .card{border:1px solid #bbb;margin-bottom:8pt;padding:8pt}
  a{color:#000;text-decoration:none}
  .phead h1{font-size:18pt}
  table.spec{min-width:0!important;font-size:10pt;border:1px solid #999}
  table.spec th,table.spec td{border-bottom:1px solid #ccc;padding:5pt 7pt}
  table.spec thead th{background:#eee!important;color:#000!important}
  table.spec thead{display:table-header-group}
  table.spec td.hl,table.spec th.hl{background:#f2f2f2!important;color:#000!important}
  .ft{background:none!important;color:#000;padding:10pt 0 0;border-top:1px solid #999;font-size:9.5pt}
  .ft h4,.ft a,.ft .bot{color:#000!important}
  .ft-grid{grid-template-columns:1fr 1fr;gap:10pt}
}