/* Rule Security — static site stylesheet */
:root{
  --brand:#143D72;
  --brand-dark:#0B2A52;
  --brand-light:#E8EFF8;
  --ink:#17263A;
  --muted:#5D6B80;
  --line:#E2E7EF;
  --bg:#F5F7FB;
  --radius:14px;
  --shadow:0 6px 24px rgba(11,32,66,.08);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:"Segoe UI","Helvetica Neue",Arial,Roboto,"Noto Sans",sans-serif;
  color:var(--ink);background:#fff;line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
body.rtl{font-family:"Segoe UI",Tahoma,Arial,sans-serif}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* ---------- header ---------- */
header.site-header{
  position:sticky;top:0;z-index:50;background:#fff;
  border-bottom:1px solid var(--line);
}
.header-inner{
  max-width:1280px;margin:0 auto;padding:0 20px;height:78px;
  display:flex;align-items:center;gap:24px;
}
.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.brand img{height:37px;width:auto;object-fit:contain}
.brand-name{font-weight:700;font-size:19px;letter-spacing:.5px;color:var(--brand-dark);white-space:nowrap}
.brand-logo{max-width:170px}
nav.main-nav{display:flex;align-items:center;gap:8px;margin-inline-start:auto;flex-wrap:wrap}
nav.main-nav > .nav-item{position:relative}
nav.main-nav > .nav-item > a{
  display:inline-block;padding:10px 14px;font-size:13px;font-weight:600;
  letter-spacing:.08em;text-transform:uppercase;color:#263a3a;border-radius:8px;
  transition:background .18s,color .18s;
}
nav.main-nav > .nav-item > a:hover{background:var(--brand-light);color:var(--brand-dark)}
nav.main-nav > .nav-item.is-active > a{color:var(--brand);box-shadow:inset 0 -2px 0 var(--brand)}
.mega{
  position:absolute;top:calc(100% + 8px);inset-inline-start:0;min-width:260px;
  background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);
  padding:10px;display:grid;gap:2px;opacity:0;visibility:hidden;transform:translateY(-6px);
  transition:opacity .18s,transform .18s,visibility .18s;z-index:60;
}
.nav-item:hover .mega,.nav-item:focus-within .mega{opacity:1;visibility:visible;transform:none}
.mega a{display:flex;justify-content:space-between;gap:12px;padding:9px 12px;border-radius:8px;font-size:14px}
.mega a:hover{background:var(--brand-light);color:var(--brand-dark)}
.mega a span.count{color:#9aa8a8;font-size:12px}
.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.btn-quote{
  background:var(--brand);color:#fff;border:none;border-radius:999px;
  padding:12px 26px;font-size:14px;font-weight:700;letter-spacing:.04em;cursor:pointer;
  display:inline-flex;align-items:center;gap:8px;transition:background .18s,transform .18s;
}
.btn-quote:hover{background:var(--brand-dark);transform:translateY(-1px)}
.lang{position:relative}
.lang-btn{
  display:flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--line);
  border-radius:999px;padding:10px 16px;font-size:14px;font-weight:600;cursor:pointer;color:#263a3a;
}
.lang-btn:hover{border-color:var(--brand);color:var(--brand-dark)}
.lang-btn .flag{width:22px;height:auto;border-radius:2px}
.lang-menu{
  position:absolute;top:calc(100% + 8px);inset-inline-end:0;width:210px;background:#fff;
  border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);padding:8px;
  display:none;z-index:60;max-height:none;overflow:visible;
}
.lang.open .lang-menu{display:block}
.lang-menu a{display:flex;align-items:center;gap:10px;padding:9px 10px;border-radius:8px;font-size:14px}
.lang-menu a:hover{background:var(--brand-light)}
.lang-menu a.cur{background:var(--brand-light);color:var(--brand-dark);font-weight:700}
.lang-menu img{width:22px}
/* 屏幕很矮（横屏手机等）时收紧行高，保证 9 种语言一屏全显、不出现滚动条 */
@media (max-height:470px){
  .lang-menu a{padding:5px 10px;font-size:12px}
  .lang-menu img{width:18px}
  .lang-menu{padding:6px}
}
.mobile-toggle{display:none;background:none;border:1px solid var(--line);border-radius:8px;padding:8px 10px;cursor:pointer}

/* ---------- hero ---------- */
.hero{position:relative;background:#0A1B33;overflow:hidden;height:440px}
.hero-slide{position:absolute;inset:0;opacity:0;transition:opacity .9s ease;background-size:cover;background-position:center}
.hero-slide.on{opacity:1}
.hero-overlay{
  position:absolute;inset:0;background:linear-gradient(90deg,rgba(8,22,44,.86) 0%,rgba(8,22,44,.62) 55%,rgba(8,22,44,.28) 100%);
}
.hero-content{position:relative;z-index:2;height:100%;display:flex;flex-direction:column;justify-content:center;max-width:1200px;margin:0 auto;padding:0 20px;color:#fff}
.hero-kicker{font-size:12px;letter-spacing:.22em;text-transform:uppercase;color:#8FB6E4;margin-bottom:14px}
.hero h1{font-size:clamp(28px,3.4vw,50px);line-height:1.16;max-width:760px;font-weight:800}
.hero p.lead{margin-top:16px;max-width:620px;color:#D6E2F0;font-size:17px}
.hero-cta{margin-top:28px;display:flex;gap:12px;flex-wrap:wrap}
.btn-primary{background:var(--brand);color:#fff;padding:14px 28px;border-radius:999px;font-weight:700;font-size:15px;display:inline-block;transition:background .18s}
.btn-primary:hover{background:var(--brand-dark)}
.btn-ghost{border:1px solid rgba(255,255,255,.5);color:#fff;padding:14px 28px;border-radius:999px;font-weight:600;font-size:15px}
.btn-ghost:hover{background:rgba(255,255,255,.12)}
.btn-outline{border:1px solid var(--line);color:var(--brand);padding:14px 28px;border-radius:999px;font-weight:600;font-size:15px;display:inline-block;transition:background .18s,border-color .18s}
.btn-outline:hover{background:var(--brand-light);border-color:var(--brand)}
.hero-dots{position:absolute;bottom:22px;inset-inline-start:50%;transform:translateX(-50%);display:flex;gap:8px;z-index:3}
.hero-dots span{width:26px;height:4px;border-radius:2px;background:rgba(255,255,255,.35);cursor:pointer}
.hero-dots span.on{background:#fff}

/* ---------- sections ---------- */
section{padding:64px 0}
section.alt{background:var(--bg)}
.section-head{max-width:760px;margin-bottom:36px}
.section-head h2{font-size:clamp(22px,2.2vw,32px);font-weight:800;letter-spacing:-.01em}
.section-head p{color:var(--muted);margin-top:10px}
.kicker{display:inline-block;font-size:12px;letter-spacing:.2em;text-transform:uppercase;color:var(--brand);font-weight:700;margin-bottom:12px}

.cat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:16px}
.cat-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;
  transition:transform .18s,box-shadow .18s,border-color .18s;display:block;
}
.cat-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#B9CCE4}
.cat-card h3{font-size:16px;font-weight:700;color:#14263C}
.cat-card .cnt{margin-top:8px;font-size:13px;color:var(--muted)}
.cat-card .bar{margin-top:16px;height:3px;width:34px;background:var(--brand);border-radius:2px}

.prod-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:20px}
.prod-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  transition:transform .18s,box-shadow .18s;display:flex;flex-direction:column;
}
.prod-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.prod-card .thumb{aspect-ratio:4/3;background:#F3F6FA;display:flex;align-items:center;justify-content:center;padding:16px}
.prod-card .thumb img{max-width:100%;max-height:100%;object-fit:contain}
.prod-card .body{padding:16px 18px 20px;border-top:1px solid var(--line);flex:1;display:flex;flex-direction:column;gap:6px}
.prod-card .body .cat{font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--brand);font-weight:700}
.prod-card .body h3{font-size:16px;font-weight:700;letter-spacing:.01em}
.prod-card .body .link{margin-top:auto;font-size:13px;font-weight:600;color:var(--brand-dark);padding-top:10px}

.why-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px}
.why{background:#fff;border-radius:var(--radius);padding:26px;border:1px solid var(--line)}
.why h3{font-size:17px;margin-bottom:8px}
.why p{color:var(--muted);font-size:14.5px}
.about-strip{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center}
.about-strip > div > img{border-radius:var(--radius);box-shadow:var(--shadow)}

/* ---------- page heads ---------- */
.page-head{background:linear-gradient(120deg,#0A1F3C,#164B8A);color:#fff;padding:56px 0}
.page-head .crumb{font-size:12.5px;color:#9FC0E0;margin-bottom:10px}
.page-head .crumb a:hover{text-decoration:underline}
.page-head h1{font-size:clamp(24px,2.6vw,38px);font-weight:800}
.page-head p{margin-top:10px;color:#CFDDEB;max-width:720px}

/* ---------- filters ---------- */
.filter-bar{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:26px}
.chip{
  border:1px solid var(--line);background:#fff;border-radius:999px;padding:9px 16px;
  font-size:13.5px;font-weight:600;cursor:pointer;color:#31465E;
}
.chip:hover{border-color:var(--brand);color:var(--brand-dark)}
.chip.on{background:var(--brand);border-color:var(--brand);color:#fff}
.search-input{
  width:100%;max-width:330px;padding:11px 16px;border:1px solid var(--line);border-radius:999px;
  font-size:14px;margin-bottom:18px;outline:none;
}
.search-input:focus{border-color:var(--brand)}
.empty{padding:40px;text-align:center;color:var(--muted);display:none}

/* ---------- product detail ---------- */
.product-wrap{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start;padding:56px 0}
.gallery .main{
  background:#F3F6FA;border:1px solid var(--line);border-radius:var(--radius);
  aspect-ratio:4/3;display:flex;align-items:center;justify-content:center;padding:22px;
}
.gallery .main img{max-width:100%;max-height:100%;object-fit:contain}
.gallery .thumbs{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:10px}
.gallery .thumbs img{
  width:100%;aspect-ratio:4/3;object-fit:cover;border:2px solid var(--line);border-radius:10px;
  cursor:pointer;background:#fff;transition:border-color .15s;
}
.gallery .thumbs img.on{border-color:var(--brand)}
.p-meta .cat-tag{display:inline-block;background:var(--brand-light);color:var(--brand-dark);font-size:12px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;padding:6px 12px;border-radius:999px}
.p-meta h1{font-size:clamp(26px,2.8vw,40px);font-weight:800;margin:16px 0 10px;letter-spacing:.01em}
.p-meta .intro{color:var(--muted);font-size:15.5px}
.p-meta .actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}
.btn-line{border:1.5px solid var(--brand);color:var(--brand-dark);padding:13px 26px;border-radius:999px;font-weight:700;font-size:14px;display:inline-block}
.btn-line:hover{background:var(--brand-light)}
.p-block{margin-top:44px}
.p-block h2{font-size:19px;font-weight:800;padding-bottom:12px;border-bottom:2px solid var(--brand-light);margin-bottom:18px}
.p-block .cols{display:grid;grid-template-columns:1fr 1fr;gap:0 28px}
.p-block ul{list-style:none;display:flex;flex-direction:column;gap:9px}
.p-block li{position:relative;padding-inline-start:20px;font-size:14.6px;color:#2B3A4E}
.p-block li::before{content:"";position:absolute;inset-inline-start:0;top:9px;width:6px;height:6px;border-radius:50%;background:var(--brand)}
.note{font-size:12.5px;color:#8b9a9a;font-style:italic;margin-top:14px}
/* at-a-glance spec card */
.glance{width:100%;border-collapse:collapse;margin:16px 0 22px}
.glance th,.glance td{text-align:start;padding:11px 0;border-bottom:1px solid var(--line);font-size:14px;vertical-align:top}
.glance th{font-weight:700;color:var(--muted);width:44%;font-size:12px;letter-spacing:.06em;text-transform:uppercase}
.glance td{font-weight:600;color:#1F3350}
/* other families cross-links */
.fam-links{padding:8px 0 26px}
.fam-links h2{font-size:16px;font-weight:800;margin-bottom:14px;color:#1F3350}
.chip.a{text-decoration:none}

/* ---------- article ---------- */
.article{max-width:860px;margin:0 auto;padding:56px 20px}
.article h1{font-size:clamp(24px,2.6vw,34px);font-weight:800;line-height:1.25;margin-bottom:18px}
.article p{margin-bottom:14px;color:#33445A;font-size:16px}
.learn-list{display:grid;gap:16px;max-width:900px}
.learn-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.learn-card h3{font-size:18px;margin-bottom:8px}
.learn-card p{color:var(--muted);font-size:14.5px}
.learn-card a.more{display:inline-block;margin-top:12px;font-weight:700;color:var(--brand-dark);font-size:14px}

/* ---------- contact ---------- */
.contact-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:40px}
.contact-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px}
.contact-row{display:flex;gap:14px;padding:14px 0;border-bottom:1px dashed var(--line);font-size:15px}
.contact-row:last-child{border:none}
.contact-row .k{min-width:104px;font-weight:700;color:#22334A}
.contact-table{width:100%;border-collapse:collapse;margin-top:8px}
.contact-table th,.contact-table td{text-align:start;padding:12px 8px;border-bottom:1px solid var(--line);font-size:14.5px}
.contact-table th{font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.certs{display:flex;gap:18px;align-items:center;flex-wrap:wrap}
/* ---------- quote form ---------- */
.quote-card{scroll-margin-top:96px}
.qf-title{font-size:22px;margin:0 0 6px}
.qf-sub{margin:0 0 20px;color:var(--muted);font-size:14.5px}
.quote-form{display:grid;gap:16px;max-width:100%}
.qf-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px 16px}
.qf-field{display:flex;flex-direction:column;gap:6px;font-size:13px;font-weight:600;color:#22334A}
.qf-field span{letter-spacing:.02em}
.qf-field input,.qf-field textarea{
  font:inherit;font-weight:400;font-size:14px;color:var(--ink);background:#fff;
  border:1px solid var(--line);border-radius:10px;padding:11px 13px;width:100%;box-sizing:border-box;
  transition:border-color .15s,box-shadow .15s;
}
.qf-field input:focus,.qf-field textarea:focus{
  outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-light);
}
.qf-field textarea{resize:vertical;min-height:110px}
.qf-actions{display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.qf-actions .btn-primary{border:none;cursor:pointer}
.qf-actions .btn-primary:disabled{opacity:.6;cursor:default}
.qf-note{margin:0;font-size:12.5px;color:var(--muted);flex:1;min-width:220px}
.qf-msg{font-size:14px;font-weight:600;display:none}
.qf-msg.is-ok,.qf-msg.is-err{display:block}
.qf-msg.is-ok{color:#1B6E3C;background:#EAF7EF;border:1px solid #BFE5CD;border-radius:10px;padding:12px 14px}
.qf-msg.is-err{color:#A3231C;background:#FDEEEC;border:1px solid #F4C9C4;border-radius:10px;padding:12px 14px}
.qf-msg a{color:inherit;text-decoration:underline}
.certs img{height:44px;width:auto;object-fit:contain;opacity:.9}

/* ---------- footer ---------- */
footer.site-footer{background:#0B1E33;color:#C3D0E0;padding:56px 0 26px;margin-top:20px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:36px}
footer h4{color:#fff;font-size:14px;letter-spacing:.1em;text-transform:uppercase;margin-bottom:16px}
footer a{color:#C3D0E0;font-size:14px;display:block;padding:5px 0}
footer a:hover{color:#8FB6E4}
.footer-about p{font-size:14px;color:#9AACC2;max-width:320px}
.f-contact{font-size:14px}
.f-row{display:flex;gap:10px;padding:5px 0}
.f-label{flex:0 0 88px;color:#fff;font-weight:600;line-height:1.5}
.f-val{color:#9AACC2;line-height:1.5;min-width:0;flex:1}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);margin-top:36px;padding-top:20px;font-size:12.5px;color:#7C8DA6;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}
/* social icons (official brand marks) */
.footer-social{display:flex;gap:10px;margin-top:18px;flex-wrap:wrap}
.footer-social a{
  width:38px;height:38px;border-radius:50%;background:#1E3552;
  display:flex;align-items:center;justify-content:center;padding:0;
  transition:background .18s,transform .18s;
}
.footer-social a:hover{background:#28466B;transform:translateY(-1px)}
.footer-social img{width:18px;height:18px;display:block;border-radius:0;box-shadow:none}

/* floating WhatsApp button */
.wa-float{
  position:fixed;right:22px;bottom:22px;z-index:80;width:58px;height:58px;border-radius:50%;
  background:#25D366;display:flex;align-items:center;justify-content:center;
  box-shadow:0 6px 18px rgba(11,30,51,.28);transition:transform .18s,box-shadow .18s;
}
.wa-float:hover{transform:scale(1.06);box-shadow:0 10px 24px rgba(11,30,51,.34)}
.wa-float img{width:28px;height:28px;display:block}
@media(max-width:560px){
  .wa-float{width:52px;height:52px;right:16px;bottom:16px}
  .wa-float img{width:25px;height:25px}
}

/* ---------- responsive ---------- */
@media(max-width:1080px){
  .header-inner{gap:12px}
  nav.main-nav{gap:0}
  nav.main-nav > .nav-item > a{padding:9px 9px;font-size:12px}
  .prod-grid{grid-template-columns:repeat(auto-fill,minmax(200px,1fr))}
}
@media(max-width:900px){
  .header-inner{height:auto;padding:12px 16px;flex-wrap:wrap}
  .brand img{height:35px}
  nav.main-nav{order:3;width:100%;display:none;flex-direction:column;align-items:stretch;gap:2px;margin-top:8px}
  nav.main-nav.open{display:flex}
  nav.main-nav > .nav-item > a{display:block;padding:12px 8px}
  .mega{position:static;display:none;box-shadow:none;border:none;padding:4px 0 6px 14px;background:#F4F7FB}
  .nav-item.open .mega{display:grid;opacity:1;visibility:visible;transform:none}
  .mobile-toggle{display:block;margin-inline-start:auto}
  .header-actions{margin-inline-start:0}
  .hero{height:auto;min-height:380px}
  .hero-content{padding:60px 20px}
  .about-strip,.product-wrap,.contact-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .p-block .cols{grid-template-columns:1fr}
}
@media(max-width:560px){
  section{padding:44px 0}
  .footer-grid{grid-template-columns:1fr}
  .gallery .thumbs{grid-template-columns:repeat(4,1fr)}
  .btn-quote{padding:10px 18px;font-size:13px}
  .lang-btn{padding:8px 10px;font-size:13px}
}
[dir="rtl"] .p-block li::before{inset-inline-start:auto;inset-inline-end:0}
[dir="rtl"] .p-block li{padding-inline-start:0;padding-inline-end:20px}

/* ---- product specification table (restored from the original site) ---- */
.spec-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;margin-top:10px}
table.spec{width:100%;border-collapse:collapse;font-size:14px;line-height:1.55;background:#fff}
table.spec th,table.spec td{border:1px solid var(--line);padding:9px 13px;text-align:start;vertical-align:top}
table.spec th.h{background:var(--brand-dark);color:#fff;font-weight:700;font-size:13.5px;letter-spacing:.02em}
table.spec th.lb{background:var(--brand-light);color:var(--brand-dark);font-weight:600;width:30%;min-width:118px}
table.spec th.sec{background:#EDF2F9;color:var(--brand-dark);font-weight:700;text-align:center;vertical-align:middle;
  width:110px;white-space:normal;letter-spacing:.04em;font-size:13px;text-transform:uppercase}
table.spec td{color:var(--ink)}
table.spec.wide{min-width:600px}
table.spec tr:hover td{background:#FAFCFF}
@media(max-width:560px){table.spec{font-size:13px}table.spec th,table.spec td{padding:7px 9px}}
[dir="rtl"] table.spec th,table.spec td{text-align:right}
[dir="rtl"] table.spec th.lb{white-space:normal}
/* ---- original product content blocks (overview text, bullets, then table) ---- */
.spec-h{font-size:16px;font-weight:700;color:var(--brand-dark);margin:22px 0 8px;letter-spacing:.01em}
.spec-h:first-child{margin-top:4px}
.spec-p{font-size:15px;line-height:1.75;color:#44566F;margin:0 0 12px}
.spec-list{margin:0 0 16px;padding-inline-start:0;list-style:none}
.spec-list li{position:relative;padding-inline-start:18px;font-size:15px;line-height:1.75;color:#44566F;margin-bottom:7px}
.spec-list li::before{content:"";position:absolute;inset-inline-start:0;top:9px;width:6px;height:6px;border-radius:50%;background:var(--brand-2,#143D72)}
.spec-text{font-size:15px;line-height:1.8;color:#44566F}