/* JASTAR 独立站共用样式 —— index.html 与 products.html 共用 */
:root{
  --teal:#17796E;
  --teal-dark:#0E564E;
  --teal-mid:#1B8C7F;
  --teal-light:#E9F4F2;
  --teal-pale:#F4FAF9;
  --amber:#E8912B;
  --wa:#25D366;
  --ink:#1C2A29;
  --body:#4A5A58;
  --gray:#7C8C8A;
  --line:#E3EAE9;
  --white:#fff;
  --max:1200px;
  --r:12px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;
  color:var(--ink);background:var(--white);
  font-size:16px;line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:0;background:none}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}

h1,h2,h3,h4{font-weight:600;line-height:1.25;letter-spacing:-0.01em}
h1{font-size:clamp(30px,4.6vw,52px)}
h2{font-size:clamp(24px,3.1vw,36px)}
h3{font-size:clamp(17px,1.4vw,19px)}
.eyebrow{
  font-size:12px;font-weight:600;letter-spacing:.16em;text-transform:uppercase;
  color:var(--teal);margin-bottom:14px
}
.lead{color:var(--body);font-size:clamp(15px,1.15vw,17px);max-width:680px}
.section{padding:84px 0}
.section-alt{background:var(--teal-pale)}
.section-head{margin-bottom:44px}
.section-head h2{margin-bottom:14px}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:14px 26px;border-radius:8px;font-size:15px;font-weight:600;
  transition:transform .15s ease,background .15s ease,box-shadow .15s ease;
  white-space:nowrap
}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--teal);color:#fff}
.btn-primary:hover{background:var(--teal-dark)}
.btn-amber{background:var(--amber);color:#fff}
.btn-amber:hover{background:#cf7d1f}
.btn-wa{background:var(--wa);color:#fff}
.btn-wa:hover{background:#1eb955}
.btn-ghost{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.6)}
.btn-ghost:hover{background:rgba(255,255,255,.14)}
.btn-outline{background:transparent;color:var(--teal);border:1.5px solid var(--teal)}
.btn-outline:hover{background:var(--teal-light)}
.btn-sm{padding:10px 18px;font-size:14px}

/* ---------- header ---------- */
.hdr{
  position:sticky;top:0;z-index:80;background:rgba(255,255,255,.96);
  backdrop-filter:saturate(180%) blur(10px);border-bottom:1px solid var(--line)
}
.hdr-in{display:flex;align-items:center;justify-content:space-between;height:70px;gap:24px}
/* 页内锚点跳转：给吸顶页头（70px）留出空间，否则目标会被页头盖住 */
#products,#cat-compact,#cat-instant,#cat-taps,#cat-heaters{scroll-margin-top:88px}
.brand{display:flex;align-items:center;flex-shrink:0;color:var(--teal-dark)}
.brand-lock{display:flex;flex-direction:column;align-items:flex-start;gap:3px;min-width:0}
.brand-logo{height:38px;width:auto;display:block}
.brand-sub{font-size:10.5px;color:var(--gray);letter-spacing:.04em;line-height:1;white-space:nowrap}
.fbrand{color:#fff}
.fbrand .brand-logo{height:38px}
.fbrand .brand-sub{color:rgba(255,255,255,.62)}
.fbrand .brand-lock{gap:5px}
.nav{display:flex;align-items:center;gap:30px}
.nav a{font-size:14.5px;color:var(--body);font-weight:500;transition:color .15s}
.nav a:hover{color:var(--teal)}
.hdr-cta{display:flex;align-items:center;gap:10px}
.burger{display:none;width:42px;height:42px;border-radius:8px;align-items:center;justify-content:center}
.burger span{display:block;width:20px;height:2px;background:var(--ink);position:relative}
.burger span::before,.burger span::after{
  content:"";position:absolute;left:0;width:20px;height:2px;background:var(--ink)
}
.burger span::before{top:-6px}
.burger span::after{top:6px}
.mnav{display:none;border-top:1px solid var(--line);background:#fff}
.mnav.open{display:block}
.mnav a{display:block;padding:15px 24px;border-bottom:1px solid var(--line);font-size:15px;font-weight:500}
.mnav .mnav-cta{padding:18px 24px;display:flex;gap:10px;flex-wrap:wrap}

/* ---------- hero ---------- */
.hero{position:relative;min-height:640px;display:flex;align-items:center;overflow:hidden;background:#0d2b28}
.hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center 38%}
.hero-ov{
  position:absolute;inset:0;
  background:linear-gradient(103deg,rgba(8,38,35,.93) 0%,rgba(10,48,44,.82) 42%,rgba(12,60,55,.42) 100%)
}
.hero-in{position:relative;z-index:2;padding:76px 0;width:100%}
.hero-copy{max-width:660px}
.hero .eyebrow{color:#7FD8C6}
.hero h1{color:#fff;margin-bottom:20px}
.hero h1 em{font-style:normal;color:#8FE3D0}
.hero-sub{color:rgba(255,255,255,.88);font-size:clamp(15px,1.2vw,17.5px);margin-bottom:32px;max-width:600px}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:36px}
.hero-tags{display:flex;gap:10px 22px;flex-wrap:wrap;padding-top:26px;border-top:1px solid rgba(255,255,255,.22)}
.hero-tags span{color:rgba(255,255,255,.85);font-size:13.5px;display:flex;align-items:center;gap:7px}
.dot{width:6px;height:6px;border-radius:50%;background:#7FD8C6;flex-shrink:0}

/* ---------- stats ---------- */
.stats{background:var(--teal);color:#fff;padding:0}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.stat{padding:34px 26px;border-right:1px solid rgba(255,255,255,.16)}
.stat:last-child{border-right:0}
.stat b{display:block;font-size:clamp(26px,2.8vw,36px);font-weight:700;line-height:1.1;margin-bottom:6px}
.stat span{font-size:13.5px;color:rgba(255,255,255,.8)}

/* ---------- products ---------- */
.grid-4{display:grid;grid-template-columns:repeat(auto-fit,minmax(255px,1fr));gap:24px}
.pcard{
  border:1px solid var(--line);border-radius:var(--r);overflow:hidden;background:#fff;
  display:flex;flex-direction:column;transition:box-shadow .2s ease,border-color .2s ease
}
.pcard:hover{box-shadow:0 12px 30px rgba(23,121,110,.12);border-color:#c9dedb}
.pcard-img{position:relative;aspect-ratio:4/3;overflow:hidden;background:#f0f4f3}
.pcard-img img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease}
.pcard:hover .pcard-img img{transform:scale(1.045)}
.pcard-body{padding:20px 20px 22px;display:flex;flex-direction:column;flex:1}
.pcard h3{margin-bottom:9px}
.pcard p{font-size:14px;color:var(--body);margin-bottom:16px;flex:1}
.price-row{
  display:flex;align-items:baseline;justify-content:space-between;gap:12px;
  padding:13px 0;border-top:1px solid var(--line);margin-bottom:16px;flex-wrap:wrap
}
.price{font-size:19px;font-weight:700;color:var(--teal)}
.price small{font-size:12px;font-weight:500;color:var(--gray);margin-right:3px}
.moq{font-size:12.5px;color:var(--gray)}
.pnote{font-size:12px;color:var(--gray);margin-top:6px}

/* ---------- split ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.split.rev .split-media{order:2}
.split-media img{border-radius:var(--r);width:100%;object-fit:cover}
.media-duo{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.media-duo img{aspect-ratio:4/3;border-radius:10px}
.feature-list{list-style:none;margin-top:26px;display:grid;gap:18px}
.feature-list li{display:flex;gap:14px}
.fl-ic{
  width:38px;height:38px;border-radius:9px;background:var(--teal-light);color:var(--teal);
  display:flex;align-items:center;justify-content:center;flex-shrink:0;font-size:15px;font-weight:700
}
.feature-list strong{display:block;font-size:15.5px;font-weight:600;margin-bottom:3px}
.feature-list p{font-size:14px;color:var(--body)}

/* ---------- process ---------- */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:22px}
.step{border:1px solid var(--line);border-radius:var(--r);overflow:hidden;background:#fff}
.step-img{aspect-ratio:16/10;overflow:hidden;background:#eef2f1}
.step-img img{width:100%;height:100%;object-fit:cover}
.step-body{padding:18px 20px 20px}
.step-num{
  display:inline-flex;align-items:center;justify-content:center;
  width:26px;height:26px;border-radius:7px;background:var(--teal);color:#fff;
  font-size:12.5px;font-weight:700;margin-bottom:10px
}
.step h3{font-size:16px;margin-bottom:6px}
.step p{font-size:13.5px;color:var(--body)}

/* ---------- quality ---------- */
.qgrid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.qlist{list-style:none;margin-top:26px;display:grid;gap:14px}
.qlist li{display:flex;gap:11px;font-size:14.5px;color:var(--body);align-items:flex-start}
.qlist li b{color:var(--ink);font-weight:600}
.tick{
  width:19px;height:19px;border-radius:50%;background:var(--teal-light);color:var(--teal);
  display:flex;align-items:center;justify-content:center;flex-shrink:0;margin-top:2px
}
.tick svg{width:11px;height:11px}
.qmedia{display:grid;gap:14px}
.qmedia img{border-radius:var(--r);width:100%;object-fit:cover;aspect-ratio:4/3}

/* ---------- gallery ---------- */
.gal{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.gal figure{border-radius:10px;overflow:hidden;aspect-ratio:4/3;background:#eef2f1}
.gal img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease}
.gal figure:hover img{transform:scale(1.05)}

/* ---------- why ---------- */
.why{display:grid;grid-template-columns:repeat(auto-fit,minmax(272px,1fr));gap:22px}
.why-item{padding:26px 24px;border-radius:var(--r);background:#fff;border:1px solid var(--line)}
.why-item .fl-ic{margin-bottom:15px;width:42px;height:42px}
.why-item h3{font-size:16.5px;margin-bottom:8px}
.why-item p{font-size:14px;color:var(--body)}

/* ---------- cert ---------- */
.certband{
  background:var(--teal-dark);color:#fff;border-radius:var(--r);
  padding:38px 40px;display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap
}
.certband h3{font-size:20px;margin-bottom:7px}
.certband p{font-size:14px;color:rgba(255,255,255,.78);max-width:640px}
.cert-badges{display:flex;gap:12px;flex-wrap:wrap}
.cbadge{
  border:1.5px solid rgba(255,255,255,.45);border-radius:9px;padding:12px 20px;
  text-align:center;min-width:96px
}
.cbadge b{display:block;font-size:16px;font-weight:700;letter-spacing:.04em}
.cbadge span{font-size:11.5px;color:rgba(255,255,255,.7)}

/* ---------- contact ---------- */
.cgrid{display:grid;grid-template-columns:1.15fr .85fr;gap:44px;align-items:start}
.form{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:30px 28px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;font-weight:600;margin-bottom:7px;color:var(--ink)}
.field label i{color:var(--gray);font-style:normal;font-weight:400}
.field input,.field select,.field textarea{
  width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:8px;
  font-size:14.5px;font-family:inherit;color:var(--ink);background:#fff;
  transition:border-color .15s ease,box-shadow .15s ease
}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--teal);box-shadow:0 0 0 3px rgba(23,121,110,.12)
}
.field textarea{resize:vertical;min-height:96px}
.form-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:8px}
.form-note{font-size:12.5px;color:var(--gray);margin-top:14px;line-height:1.6}
.form-status{display:none;font-size:13.5px;line-height:1.6;margin-top:14px;padding:11px 14px;border-radius:8px}
.form-status.ok{display:block;background:var(--teal-light);color:var(--teal-dark);font-weight:600}
.form-status.err{display:block;background:#FDEDEA;color:#A93226;font-weight:600}
.form-status.wait{display:block;background:var(--teal-pale);color:var(--gray)}
.info-card{background:var(--teal-pale);border:1px solid var(--line);border-radius:var(--r);padding:28px 26px}
.info-item{display:flex;gap:14px;padding:14px 0;border-bottom:1px solid var(--line)}
.info-item:last-of-type{border-bottom:0}
.info-ic{
  width:38px;height:38px;border-radius:9px;background:var(--teal);color:#fff;
  display:flex;align-items:center;justify-content:center;flex-shrink:0
}
.info-ic svg{width:18px;height:18px}
.info-item b{display:block;font-size:13px;color:var(--gray);font-weight:500;margin-bottom:2px}
.info-item a,.info-item span{font-size:15px;font-weight:600;word-break:break-word}
.info-item a:hover{color:var(--teal)}
.qr-row{display:flex;gap:22px;margin-top:22px;padding-top:22px;border-top:1px solid var(--line)}
.qr-row figure{text-align:center;flex:1}
.qr-row img{width:100%;max-width:118px;margin:0 auto 8px;border-radius:8px;border:1px solid var(--line)}
.qr-row figcaption{font-size:12px;color:var(--gray)}

/* ---------- footer ---------- */
footer{background:#12211F;color:rgba(255,255,255,.72);padding:58px 0 30px;font-size:14px}
.fgrid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;margin-bottom:40px}
.fgrid h4{color:#fff;font-size:14px;font-weight:600;margin-bottom:16px;letter-spacing:.03em}
.fgrid ul{list-style:none;display:grid;gap:10px}
.fgrid a:hover{color:#8FE3D0}
.fbrand{margin-bottom:16px}
.fbrand .brand-txt strong{color:#fff}
.fbrand .brand-txt span{color:rgba(255,255,255,.55)}
.fbrand .brand-mark{background:var(--teal-mid)}
.fslogan{font-size:13.5px;line-height:1.7;color:rgba(255,255,255,.6);max-width:300px}
.fbot{
  border-top:1px solid rgba(255,255,255,.13);padding-top:22px;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:12.5px;color:rgba(255,255,255,.5)
}

/* ---------- mobile action bar ---------- */
.mbar{display:none}

/* ---------- responsive ---------- */
@media (max-width:1080px){
  .nav{gap:22px}
  .split,.qgrid,.cgrid{grid-template-columns:1fr;gap:34px}
  .split.rev .split-media{order:0}
  .fgrid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:900px){
  .nav,.hdr-cta .btn{display:none}
  .burger{display:flex}
  .gal{grid-template-columns:repeat(2,1fr)}
  .section{padding:60px 0}
  .stats-grid{grid-template-columns:1fr 1fr}
  .stat{padding:26px 18px;border-bottom:1px solid rgba(255,255,255,.16)}
  .stat:nth-child(2n){border-right:0}
  .certband{padding:30px 24px}
}
@media (max-width:640px){
  body{font-size:15px}
  .wrap{padding:0 18px}
  .hdr-in{height:62px}
  .brand-sub{display:none}
  .brand-logo{height:32px}
  .hero{min-height:0}
  .hero-in{padding:56px 0 60px}
  .hero-bg{object-position:center 42%}
  .hero-cta{gap:10px;flex-direction:column}
  .hero-cta .btn{width:100%;flex:none}
  .hero-tags{gap:9px 16px;padding-top:20px}
  .section{padding:52px 0}
  .section-head{margin-bottom:30px}
  .grid-4,.steps,.why,.gal{grid-template-columns:1fr;gap:16px}
  .form{padding:22px 18px}
  .form-actions{flex-direction:column;gap:10px}
  .pcard .btn,.form-actions .btn{width:100%}
  .form-row{grid-template-columns:1fr;gap:0}
  .info-card{padding:22px 18px}
  .fgrid{grid-template-columns:1fr;gap:28px}
  .media-duo{grid-template-columns:1fr 1fr;gap:10px}
  body{padding-bottom:66px}
  .mbar{
    display:flex;position:fixed;left:0;right:0;bottom:0;z-index:90;
    background:#fff;border-top:1px solid var(--line);
    box-shadow:0 -3px 14px rgba(0,0,0,.07);padding:9px 14px;gap:10px
  }
  .mbar a{
    flex:1;display:flex;align-items:center;justify-content:center;gap:7px;
    padding:12px 8px;border-radius:8px;font-size:14px;font-weight:600;color:#fff
  }
  .mbar .m-wa{background:var(--wa)}
  .mbar .m-mail{background:var(--teal)}
  .mbar svg{width:17px;height:17px;flex-shrink:0}
}
@media (max-width:359px){
  .stats-grid{grid-template-columns:1fr}
  .stat{border-right:0}
}