/* ==========================================================================
   MENFISIT — Global stylesheet
   Brand: Hengnuan Smart Home (Xuzhou) Co., Ltd.
   Colors extracted from logo: red #E63A2E / blue #2F6FE4 / navy #16243D
   ========================================================================== */

:root{
  --red:#E63A2E;
  --red-dark:#C92F24;
  --blue:#2F6FE4;
  --blue-dark:#245BC0;
  --navy:#16243D;
  --ink:#1E2A3C;
  --gray:#5C6B80;
  --gray-light:#8FA0B8;
  --line:#E4E9F0;
  --bg:#FFFFFF;
  --soft:#F5F8FC;
  --radius:14px;
  --radius-sm:8px;
  --shadow:0 10px 30px rgba(22,36,61,.08);
  --shadow-hover:0 18px 44px rgba(22,36,61,.15);
  --max:1200px;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:"Segoe UI",Inter,-apple-system,"Helvetica Neue",Arial,sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit;transition:color .2s}
ul{list-style:none}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}

/* ---------- Typography helpers ---------- */
h1,h2,h3,h4,h5{color:var(--navy);line-height:1.25;font-weight:800;letter-spacing:-.01em}
.kicker{display:inline-block;font-size:13px;font-weight:700;letter-spacing:.14em;
  text-transform:uppercase;color:var(--blue);margin-bottom:14px}
.kicker.red{color:var(--red)}
.sec-title{font-size:36px}
.sec-sub{color:var(--gray);max-width:660px;margin-top:12px;font-size:16px}
.center{text-align:center}
.center .sec-sub{margin-left:auto;margin-right:auto}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 28px;border-radius:var(--radius-sm);font-weight:600;font-size:15px;
  border:2px solid transparent;cursor:pointer;transition:.22s;white-space:nowrap}
.btn-red{background:var(--red);color:#fff}
.btn-red:hover{background:var(--red-dark);color:#fff}
.btn-blue{background:var(--blue);color:#fff}
.btn-blue:hover{background:var(--blue-dark);color:#fff}
.btn-outline{border-color:var(--navy);color:var(--navy);background:transparent}
.btn-outline:hover{background:var(--navy);color:#fff}
.btn-light{background:#fff;color:var(--navy)}
.btn-light:hover{background:#F0F4FA}
.btn-ghost-light{border-color:rgba(255,255,255,.45);color:#DCE6F5;background:transparent}
.btn-ghost-light:hover{border-color:#fff;color:#fff}
.btn-row{display:flex;gap:14px;flex-wrap:wrap;align-items:center}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:80;background:#fff;border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:76px;gap:24px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand img{height:54px;width:auto}
.main-nav{display:flex;align-items:center;gap:32px;font-size:15px;font-weight:500}
.main-nav a{padding:6px 0;position:relative;color:var(--ink)}
.main-nav a:hover{color:var(--blue)}
.main-nav a.active{color:var(--red)}
.main-nav a.active::after{content:"";position:absolute;left:0;right:0;bottom:-4px;
  height:2px;background:var(--red);border-radius:2px}
.header-actions{display:flex;align-items:center;gap:18px;flex-shrink:0}
.header-actions .btn{padding:10px 22px;font-size:14px}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;padding:8px}
.nav-toggle span{display:block;width:24px;height:2px;background:var(--navy);margin:5px 0;
  transition:.25s}

@media(max-width:980px){
  .main-nav{position:fixed;top:76px;left:0;right:0;background:#fff;flex-direction:column;
    align-items:flex-start;gap:0;padding:8px 24px 20px;border-bottom:1px solid var(--line);
    box-shadow:0 12px 24px rgba(22,36,61,.08);display:none}
  .main-nav.open{display:flex}
  .main-nav a{width:100%;padding:13px 0;border-bottom:1px solid var(--line);font-size:16px}
  .main-nav a.active::after{display:none}
  .nav-toggle{display:block}
  .header-actions .btn{display:none}
  .brand img{height:44px}
}

/* ---------- Hero ---------- */
.hero{background:linear-gradient(135deg,#0F1B30 0%,#16243D 55%,#1D3160 100%);
  color:#fff;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;right:-140px;top:-140px;width:460px;height:460px;
  border-radius:50%;background:radial-gradient(circle,rgba(47,111,228,.38),transparent 70%)}
.hero::after{content:"";position:absolute;left:-120px;bottom:-160px;width:400px;height:400px;
  border-radius:50%;background:radial-gradient(circle,rgba(230,58,46,.28),transparent 70%)}
.hero-grid{display:grid;grid-template-columns:.82fr 1.18fr;gap:44px;align-items:center;
  padding:64px 0 68px;position:relative;z-index:1}
.hero h1{font-size:42px;color:#fff;line-height:1.14}
.hero h1 em{font-style:normal;color:#FF6A5B}
.hero .lead{color:#B9C6DA;font-size:17.5px;margin:20px 0 30px;max-width:520px}
.hero-badges{display:flex;gap:10px;margin-top:32px;flex-wrap:wrap}
.badge{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);
  border-radius:999px;padding:7px 16px;font-size:13px;color:#C8D4E6}

.carousel{position:relative;width:100%;height:520px;border-radius:var(--radius);
  overflow:hidden;background:#fff;box-shadow:0 18px 44px rgba(0,0,0,.35)}
.carousel img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;
  background:#fff;opacity:0;transition:opacity .8s ease}
.carousel img.on{opacity:1}
.carousel img.fit-cover{object-fit:cover}
.carousel .dots{position:absolute;bottom:14px;left:50%;transform:translateX(-50%);
  display:flex;gap:8px;z-index:3}
.carousel .dots span{width:10px;height:10px;border-radius:50%;background:rgba(22,36,61,.3);
  cursor:pointer;transition:.2s}
.carousel .dots span.on{background:var(--red)}
.carousel .arrow{position:absolute;top:50%;transform:translateY(-50%);width:38px;height:38px;
  border-radius:50%;background:rgba(255,255,255,.85);border:0;cursor:pointer;z-index:3;
  display:flex;align-items:center;justify-content:center;font-size:16px;color:var(--navy);
  opacity:0;transition:.25s;font-weight:700}
.carousel:hover .arrow{opacity:1}
.carousel .arrow.prev{left:12px}
.carousel .arrow.next{right:12px}

/* ---------- Stats ---------- */
.stats{background:#fff;border-bottom:1px solid var(--line)}
.stats-grid{display:grid;grid-template-columns:repeat(3,1fr);padding:38px 0;gap:16px}
.stat{text-align:center;padding:0 12px}
.stat b{display:block;font-size:34px;color:var(--navy);font-weight:800;line-height:1.2}
.stat b span{color:var(--red)}
.stat small{color:var(--gray);font-size:13px;letter-spacing:.03em}

/* ---------- Sections ---------- */
.section{padding:84px 0}
.section.sm{padding:60px 0}
.soft{background:var(--soft)}
.sec-head{display:flex;justify-content:space-between;align-items:flex-end;gap:32px;
  margin-bottom:44px}
.sec-head .btn{flex-shrink:0}

/* ---------- Page header (inner pages) ---------- */
.page-head{background:linear-gradient(135deg,#0F1B30,#16243D 60%,#1D3160);color:#fff;
  padding:64px 0 56px;position:relative;overflow:hidden}
.page-head::after{content:"";position:absolute;right:-100px;top:-120px;width:360px;height:360px;
  border-radius:50%;background:radial-gradient(circle,rgba(47,111,228,.35),transparent 70%)}
.page-head .kicker{color:#7FA6F0}
.page-head h1{color:#fff;font-size:40px;position:relative;z-index:1}
.page-head p{color:#B9C6DA;max-width:700px;margin-top:14px;font-size:16.5px;position:relative;z-index:1}
.crumbs{font-size:13px;color:rgba(255,255,255,.65);margin-bottom:16px;position:relative;z-index:1}
.crumbs a{color:rgba(255,255,255,.65)}
.crumbs a:hover{color:#fff}
.crumbs b{color:#fff;font-weight:600}

/* ---------- Product cards ---------- */
.prod-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:28px}
.prod-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow);transition:.25s;display:flex;flex-direction:column}
.prod-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.prod-img{height:240px;position:relative;border-bottom:1px solid var(--line);background:#fff}
.prod-img img{width:100%;height:100%;object-fit:contain;padding:10px}
.prod-img .tag{position:absolute;top:14px;left:14px;background:var(--blue);color:#fff;
  font-size:12px;font-weight:700;padding:4px 12px;border-radius:999px;z-index:2}
.prod-img .tag.alt{background:var(--red)}
.prod-body{padding:24px 26px 28px;flex:1;display:flex;flex-direction:column}
.prod-body h3{font-size:20px}
.prod-body p{color:var(--gray);font-size:14.5px;margin:10px 0 16px}
.specs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:18px}
.spec{background:var(--soft);border:1px solid var(--line);border-radius:6px;padding:4px 10px;
  font-size:12px;color:var(--gray)}
.more{color:var(--blue);font-weight:600;font-size:14px;margin-top:auto}
.more:hover{color:var(--red)}

/* ---------- Systems ---------- */
.sys-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px}
.sys-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:32px;box-shadow:var(--shadow)}
.sys-card h3{font-size:21px;display:flex;align-items:center;gap:10px}
.dot{width:12px;height:12px;border-radius:3px;display:inline-block;flex-shrink:0}
.dot.w{background:var(--blue)}
.dot.e{background:var(--red)}
.sys-card>p{color:var(--gray);font-size:14.5px;margin:12px 0 20px}
.sys-img{width:100%;height:300px;object-fit:contain;background:#fff;border-radius:10px;
  border:1px solid var(--line)}
.sys-list{margin-top:18px;font-size:14px;color:var(--gray)}
.sys-list li{padding:7px 0;border-bottom:1px dashed var(--line)}
.sys-list li::before{content:"—";color:var(--blue);margin-right:8px;font-weight:700}
.e-card .sys-list li::before{color:var(--red)}

/* ---------- Feature cards ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.why{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px 24px}
.why .ic{width:46px;height:46px;border-radius:10px;display:flex;align-items:center;
  justify-content:center;font-size:22px;margin-bottom:16px}
.why .ic.r{background:#FDEBE9}
.why .ic.b{background:#E7EEFB}
.why h4{font-size:16px;margin-bottom:8px}
.why p{font-size:13.5px;color:var(--gray)}

/* ---------- CTA band ---------- */
.cta-band{background:linear-gradient(120deg,var(--red),#D4402F 45%,var(--blue));
  border-radius:var(--radius);color:#fff;padding:52px 48px;display:flex;
  justify-content:space-between;align-items:center;gap:28px}
.cta-band h2{font-size:28px;color:#fff}
.cta-band p{opacity:.92;margin-top:6px}
.cta-band .btn{flex-shrink:0}

/* ---------- Tables ---------- */
.table-wrap{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  margin:28px 0;background:#fff}
table.spec{width:100%;border-collapse:collapse;font-size:14px}
table.spec th{background:var(--soft);text-align:left;padding:14px 20px;color:var(--navy);
  font-size:12.5px;letter-spacing:.06em;text-transform:uppercase;font-weight:700}
table.spec td{padding:13px 20px;border-top:1px solid var(--line);color:var(--gray);vertical-align:top}
table.spec td:first-child{color:var(--ink);font-weight:600;width:32%}
table.spec tr:hover td{background:#FBFCFE}

/* ---------- Product detail ---------- */
.pd-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;padding:48px 0 8px;
  align-items:start}
.gallery-main{height:430px;border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;background:#fff}
.gallery-main img{width:100%;height:100%;object-fit:contain;padding:12px}
.gallery-thumbs{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:14px}
.gallery-thumbs button{border:2px solid var(--line);border-radius:10px;overflow:hidden;
  height:82px;background:#fff;cursor:pointer;padding:0;transition:.2s}
.gallery-thumbs button:hover{border-color:var(--blue)}
.gallery-thumbs button.on{border-color:var(--red)}
.gallery-thumbs img{width:100%;height:100%;object-fit:contain;padding:4px}
.pd-info h1{font-size:32px}
.pd-info .model{color:var(--gray);margin:10px 0 22px;font-size:15px}
.pd-info .model b{color:var(--red)}
.pd-feats{font-size:14.5px}
.pd-feats li{padding:9px 0;border-bottom:1px dashed var(--line);color:var(--ink)}
.pd-feats li::before{content:"✓";color:var(--blue);font-weight:800;margin-right:10px}
.pd-cta{display:flex;gap:14px;align-items:center;margin-top:26px;flex-wrap:wrap}

/* ---------- Related ---------- */
.related{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.rel-card{border:1px solid var(--line);border-radius:10px;overflow:hidden;background:#fff;
  transition:.2s;display:block}
.rel-card:hover{box-shadow:var(--shadow)}
.rel-card .im{height:130px;display:flex;align-items:center;justify-content:center;background:#fff}
.rel-card .im img{width:100%;height:100%;object-fit:contain;padding:8px}
.rel-card p{padding:13px 15px;font-size:13.5px;color:var(--navy);font-weight:600;
  border-top:1px solid var(--line)}

/* ---------- Forms ---------- */
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field{display:flex;flex-direction:column;gap:7px}
.field.full{grid-column:1/-1}
.field label{font-size:13.5px;font-weight:600;color:var(--navy)}
.field input,.field select,.field textarea{
  font-family:inherit;font-size:14.5px;padding:12px 14px;border:1px solid var(--line);
  border-radius:var(--radius-sm);background:#fff;color:var(--ink);transition:.2s}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(47,111,228,.12)}
.field textarea{resize:vertical;min-height:120px}
.form-note{font-size:12.5px;color:var(--gray-light);margin-top:12px}

/* ---------- Contact blocks ---------- */
.contact-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:26px;display:flex;gap:16px;align-items:flex-start}
.contact-card .ic{width:44px;height:44px;border-radius:10px;background:#E7EEFB;display:flex;
  align-items:center;justify-content:center;font-size:20px;flex-shrink:0}
.contact-card h4{font-size:15px;margin-bottom:4px}
.contact-card a,.contact-card p{font-size:14.5px;color:var(--gray)}
.contact-card a:hover{color:var(--blue)}

/* ---------- Footer ---------- */
.site-footer{background:var(--navy);color:#9FB0C8;padding:60px 0 28px;font-size:14px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px;margin-bottom:40px}
.footer-grid img.logo{height:46px;margin-bottom:16px}
.footer-grid .company{color:#fff;font-weight:600;margin-bottom:8px;font-size:14.5px}
.footer-grid h5{color:#fff;font-size:13px;letter-spacing:.1em;text-transform:uppercase;
  margin-bottom:16px}
.footer-grid a{display:block;padding:5px 0;color:#9FB0C8;font-size:14px}
.footer-grid a:hover{color:#fff}
.footer-grid p{font-size:13.5px;line-height:1.7}
.copyright{border-top:1px solid rgba(255,255,255,.12);padding-top:22px;display:flex;
  justify-content:space-between;gap:16px;font-size:12.5px;color:#6F82A0;flex-wrap:wrap}
.copyright a{color:#6F82A0}
.copyright a:hover{color:#fff}

/* ---------- WhatsApp float ---------- */
.wa-float{position:fixed;right:22px;bottom:22px;z-index:90;background:#25D366;color:#fff;
  border-radius:999px;padding:13px 22px;font-weight:700;font-size:14px;
  box-shadow:0 10px 26px rgba(0,0,0,.25);display:flex;align-items:center;gap:8px}
.wa-float:hover{background:#1FBF5A;color:#fff}

/* ---------- Misc ---------- */
.note{background:#FFF6E5;border:1px solid #F0DFB8;border-radius:var(--radius-sm);
  padding:14px 18px;font-size:13.5px;color:#8A6A1F;margin:20px 0}
.prose{max-width:820px;color:var(--gray);font-size:15.5px}
.prose h2{font-size:22px;margin:34px 0 12px}
.prose h3{font-size:17px;margin:24px 0 8px;color:var(--navy)}
.prose p{margin-bottom:14px}
.prose ul{list-style:disc;padding-left:22px;margin-bottom:14px}
.prose li{margin-bottom:8px}

/* ---------- Photo strip ---------- */
.photo-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.photo-grid img{width:100%;height:210px;object-fit:cover;border-radius:10px;background:var(--soft)}

/* ---------- Two-column layouts (about / contact) ---------- */
.grid-2{display:grid;gap:48px;align-items:start}
.contact-layout{display:grid;gap:44px;align-items:start}

@media(max-width:1024px){
  .contact-layout{grid-template-columns:1fr!important}
  .grid-2{grid-template-columns:1fr!important;gap:32px!important}
}

/* ---------- Responsive ---------- */
@media(max-width:1024px){
  .hero-grid{grid-template-columns:1fr;padding:48px 0 56px}
  .carousel{height:360px}
  .hero h1{font-size:34px}
  .sec-title{font-size:30px}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .pd-grid{grid-template-columns:1fr;gap:32px}
  .gallery-main{height:340px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .cta-band{flex-direction:column;text-align:center;padding:40px 28px}
}
@media(max-width:768px){
  .section{padding:56px 0}
  .prod-grid,.sys-grid,.grid-3,.form-grid{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:1fr;gap:24px;padding:30px 0}
  .related{grid-template-columns:repeat(2,1fr)}
  .page-head h1,.sec-title{font-size:28px}
  .hero h1{font-size:29px}
  .carousel{height:260px}
  .gallery-thumbs{grid-template-columns:repeat(4,1fr);gap:8px}
  .gallery-thumbs button{height:60px}
  .photo-grid{grid-template-columns:repeat(2,1fr);gap:10px}
  .photo-grid img{height:150px}
  .sec-head{flex-direction:column;align-items:flex-start;gap:20px}
  .wa-float{padding:11px 16px;font-size:13px;right:14px;bottom:14px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  table.spec td:first-child{width:42%}
}