/* Classic B2B theme */
:root{--brand:#1d4ed8;--ink:#1a2233;--muted:#68738a;--line:#e5e9f2;--bg:#fff;--alt:#f5f7fb}
*{margin:0;box-sizing:border-box}
body{font-family:'Segoe UI',Arial,'PingFang SC',sans-serif;color:var(--ink);background:var(--bg);line-height:1.65}
a{color:inherit;text-decoration:none}
img{max-width:100%}
.wrap{max-width:1180px;margin:0 auto;padding:0 20px}
.bar{display:flex;align-items:center;gap:18px}
.spacer{flex:1}
.muted{color:var(--muted)}
/* top bar */
.topbar{background:var(--ink);color:#cfd8ea;font-size:13px}
.topbar .bar{height:38px}
.topbar a{color:#fff}
/* header */
.sitehead{border-bottom:1px solid var(--line);background:#fff;position:sticky;top:0;z-index:50}
.sitehead .bar{height:70px}
.logo{font-size:22px;font-weight:800;color:var(--brand)}
.nav{margin-left:auto;display:flex;align-items:center;gap:4px}
.nav>a,.nav .dropdown>a{padding:10px 14px;font-weight:600;border-radius:6px}
.nav>a:hover{background:var(--alt);color:var(--brand)}
.nav .cta{background:var(--brand);color:#fff;padding:10px 20px;border-radius:6px;margin-left:10px}
.nav .cta:hover{background:#1e40af}
.dropdown{position:relative}
.dropmenu{display:none;position:absolute;top:100%;left:0;background:#fff;border:1px solid var(--line);border-radius:10px;box-shadow:0 12px 30px rgba(20,30,60,.12);padding:14px;min-width:560px;gap:18px;flex-wrap:wrap}
.dropdown:hover .dropmenu{display:flex}
.dcol{min-width:150px}
.dcol>a{font-weight:700;display:block;padding:4px 0}
.dcol .sub{display:block;color:var(--muted);font-size:14px;padding:3px 0 3px 10px}
.dcol .sub:hover{color:var(--brand)}
/* hero */
.hero{position:relative;min-height:430px;background: center/cover no-repeat;display:flex;align-items:center}
.hero-veil{position:absolute;inset:0;background:linear-gradient(90deg,rgba(10,20,45,.78),rgba(10,20,45,.35))}
.hero-inner{position:relative;color:#fff;padding:60px 20px}
.hero-inner h1{font-size:42px;max-width:720px;line-height:1.25}
.hero-inner p{margin:16px 0 28px;font-size:18px;max-width:640px;color:#dbe4f5}
.btn{display:inline-block;background:var(--brand);color:#fff;padding:12px 28px;border-radius:8px;font-weight:700;border:none;cursor:pointer;font-size:15px}
.btn:hover{background:#1e40af}
.btn.ghost{background:transparent;border:2px solid #fff;margin-left:12px}
.btn.ghost:hover{background:rgba(255,255,255,.15)}
/* sections */
.section{padding:56px 0}
.section.alt{background:var(--alt)}
.stitle{font-size:26px;margin-bottom:24px}
.bar .stitle{margin-bottom:0}
.more{margin-left:auto;color:var(--brand);font-weight:600}
/* category cards */
.catgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px}
.catcard{display:block;border:1px solid var(--line);border-radius:10px;padding:20px;background:#fff;transition:.15s}
.catcard:hover{border-color:var(--brand);box-shadow:0 6px 18px rgba(29,78,216,.1)}
.catcard span{font-weight:700;display:block}
.catcard small{color:var(--muted)}
/* product cards */
.pgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.pgrid.three{grid-template-columns:repeat(3,1fr)}
.pcard{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;transition:.15s;display:block}
.pcard:hover{transform:translateY(-3px);box-shadow:0 10px 24px rgba(20,30,60,.1)}
.pimg{height:190px;background:center/cover no-repeat;background-color:#eef1f7}
.pinfo{padding:14px 16px}
.pinfo h3{font-size:16px;margin-bottom:6px}
.pinfo p{font-size:13px;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.tag{display:inline-block;margin-top:8px;font-size:12px;background:var(--alt);color:var(--brand);padding:3px 10px;border-radius:20px;font-weight:600}
/* news */
.ngrid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.ngrid3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:30px}
.ncard{background:#fff;border:1px solid var(--line);border-radius:12px;padding:20px;display:block;transition:.15s}
.ncard:hover{box-shadow:0 8px 20px rgba(20,30,60,.08)}
.nimg{height:150px;background:center/cover no-repeat;border-radius:8px;margin-bottom:12px;background-color:#eef1f7}
.ncard h3{font-size:16px;margin-bottom:6px}
.ncard time{font-size:12px;color:var(--muted)}
.ncard p{font-size:13px;color:var(--muted);margin-top:8px}
/* cta strip */
.ctastrip{background:var(--brand);color:#fff;padding:34px 0}
.ctastrip p{color:#d7e0fb}
.ctastrip .btn{background:#fff;color:var(--brand);margin-left:auto}
/* footer */
.sitefoot{background:#131a2b;color:#9aa7c0;padding:46px 0 0;font-size:14px}
.sitefoot .cols{display:grid;grid-template-columns:2fr 1fr 1fr;gap:36px}
.sitefoot h4{color:#fff;margin-bottom:12px}
.sitefoot a{color:#9aa7c0;display:inline-block;padding:2px 0}
.sitefoot a:hover{color:#fff}
.copyright{border-top:1px solid #232d45;margin-top:34px;padding:16px 0;text-align:center;font-size:13px}
/* listing */
.pagehead{background:var(--alt);padding:34px 0;margin-bottom:30px}
.two{display:grid;grid-template-columns:240px 1fr;gap:30px;padding-bottom:60px}
.two.contact{grid-template-columns:1fr 300px}
.side h3{font-size:17px;margin-bottom:12px}
.side a{display:block;padding:8px 12px;border-radius:6px;color:var(--muted)}
.side a:hover{background:var(--alt)}
.side a.on{background:var(--brand);color:#fff}
.side a.sub{padding-left:24px;font-size:14px}
.pager{display:flex;gap:16px;justify-content:center;align-items:center;margin:34px 0 10px}
.pager a{padding:8px 16px;border:1px solid var(--line);border-radius:6px}
.pager a:hover{border-color:var(--brand);color:var(--brand)}
/* product detail */
.crumb{padding:18px 0;font-size:13px;color:var(--muted)}
.pdet{display:grid;grid-template-columns:1fr 1fr;gap:36px;margin-bottom:40px}
.pbig{height:420px;background:center/cover no-repeat;border-radius:14px;background-color:#eef1f7}
.pdetail h1{font-size:28px;margin-bottom:10px}
.sum{color:var(--muted);margin-bottom:18px}
.spec{width:100%;border-collapse:collapse;margin-bottom:22px}
.spec th,.spec td{border:1px solid var(--line);padding:9px 14px;text-align:left;font-size:14px}
.spec th{background:var(--alt);width:160px;color:var(--muted);font-weight:600}
.dtabs{margin-bottom:50px}
.dtabs h2{font-size:20px;border-bottom:2px solid var(--brand);display:inline-block;padding-bottom:8px;margin-bottom:18px}
.rich{line-height:1.8}
.rich img{border-radius:10px;margin:10px 0}
/* article */
.narrow{max-width:820px}
.article h1{font-size:30px;margin:18px 0 8px}
.acover{border-radius:12px;margin:18px 0}
.article .rich{margin-top:18px}
/* contact */
.cform{background:#fff;border:1px solid var(--line);border-radius:12px;padding:26px;display:flex;flex-direction:column;gap:16px}
.frow{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.cform label{display:flex;flex-direction:column;font-size:14px;font-weight:600;gap:6px}
.cform input,.cform textarea{border:1px solid var(--line);border-radius:8px;padding:11px 12px;font-size:15px;font-family:inherit}
.cform input:focus,.cform textarea:focus{outline:2px solid var(--brand);border-color:transparent}
.honeypot{position:absolute;left:-9999px}
.notice{padding:14px 18px;border-radius:10px;margin-bottom:18px;font-weight:600}
.notice.ok{background:#e8f7ee;color:#157347}
.notice.err{background:#fdecec;color:#b3261e}
.center404{text-align:center;padding:90px 20px}
.center404 h1{font-size:80px;color:var(--brand)}
@media(max-width:900px){
  .pgrid,.pgrid.three,.ngrid,.ngrid3{grid-template-columns:repeat(2,1fr)}
  .two{grid-template-columns:1fr}
  .side{order:2}
  .pdet{grid-template-columns:1fr}
  .sitefoot .cols{grid-template-columns:1fr}
  .hero{min-height:340px}
  .hero-inner h1{font-size:30px}
  .hero-inner p{font-size:15px}
  .section{padding:38px 0}
  .stitle{font-size:22px}
  .ctastrip .bar{flex-direction:column;align-items:flex-start;gap:14px}
  .ctastrip .btn{margin-left:0}
  .topbar .bar{height:auto;padding:7px 0;flex-wrap:wrap;gap:6px 14px;font-size:12px}
  .topbar .spacer{display:none}
  .pbig{height:300px}
  .dropmenu{min-width:280px}
  .spec th{width:110px}
}
/* mobile nav (CSS-only drawer) */
.navtoggle{display:none}
.burger{display:none;flex-direction:column;gap:5px;padding:10px;cursor:pointer;margin-left:auto}
.burger span{width:22px;height:2px;background:var(--ink);border-radius:2px;transition:.2s}
.navclose{display:none}
@media(max-width:820px){
  .burger{display:flex}
  .sitehead .bar{position:relative}
  .sitehead .logo{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;min-width:0}
  .nav{display:none;position:absolute;top:100%;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 16px 30px rgba(20,30,60,.12);flex-direction:column;align-items:stretch;padding:10px 20px 18px;gap:2px;max-height:calc(100vh - 70px);overflow:auto}
  .navtoggle:checked~.nav{display:flex}
  .nav>a,.nav .dropdown>a{padding:13px 8px;border-bottom:1px solid var(--line);border-radius:0}
  .nav .cta{margin:14px 0 0;text-align:center}
  .dropdown{position:static}
  .dropmenu{position:static;box-shadow:none;border:none;padding:0 0 6px 14px;min-width:0;display:flex;flex-direction:column;flex-wrap:nowrap}
  .dcol{min-width:0}
  .navclose{display:block;position:absolute;top:10px;right:14px;font-size:20px;color:var(--muted);padding:6px 10px;cursor:pointer}
}
@media(max-width:760px){.two.contact{grid-template-columns:1fr}}
@media(max-width:560px){
  .pgrid,.ngrid,.ngrid3{grid-template-columns:1fr}
  .frow{grid-template-columns:1fr}
  .wrap{padding:0 14px}
  .hero-inner{padding:42px 14px}
  .hero-inner h1{font-size:25px}
  .btn.ghost{margin-left:0;margin-top:10px;display:block;text-align:center;max-width:220px}
  .article h1{font-size:24px}
  .pdetail h1{font-size:22px}
  .crumb{overflow-wrap:anywhere}
  .pager{gap:10px}
  .pager a{padding:8px 12px;font-size:14px}
}