:root{
    --navy:#0D2D5E;
    --navy-dark:#081C3D;
    --gold:#C9973E;
    --ink:#111827;
    --gray:#6B7280;
    --line:#E5E7EB;
    --bg:#F7F8FA;
  }
  *{box-sizing:border-box;margin:0;padding:0;}
  body{
    font-family:'Segoe UI',system-ui,-apple-system,sans-serif;
    background:var(--bg);
    color:var(--ink);
    line-height:1.5;
  }
  img{max-width:100%;display:block;}

  /* HERO */
  .hero{
    position:relative;
    background:var(--navy-dark);
    color:#fff;
    padding:0;
    overflow:hidden;
  }
  .hero img{width:100%;height:auto;display:block;}
  .hero-overlay{
    padding:28px 20px 34px;
    background:linear-gradient(180deg, var(--navy-dark) 0%, var(--navy) 100%);
  }
  .hero-eyebrow{
    font-size:11px;
    letter-spacing:2px;
    text-transform:uppercase;
    color:var(--gold);
    font-weight:600;
    margin-bottom:10px;
  }
  .hero h1{
    font-size:28px;
    font-weight:800;
    line-height:1.2;
    margin-bottom:10px;
    letter-spacing:-0.5px;
  }
  .hero p{
    font-size:15px;
    color:#C7D3E8;
    max-width:520px;
  }

  /* WHY */
  .why-wrap{
    background:#fff;
    border-bottom:1px solid var(--line);
    padding:26px 18px;
  }
  .why-inner{
    max-width:960px;
    margin:0 auto;
    display:grid;
    grid-template-columns:1fr;
    gap:16px;
  }
  .why-item{
    display:flex;
    flex-direction:column;
    gap:3px;
    padding-left:14px;
    border-left:3px solid var(--gold);
  }
  .why-title{
    font-size:14.5px;
    font-weight:800;
    color:var(--navy);
  }
  .why-desc{
    font-size:13px;
    color:var(--gray);
  }
  @media (min-width:640px){
    .why-inner{grid-template-columns:1fr 1fr;}
  }

  /* CERTS */
  .cert-strip{
    background:var(--navy-dark);
    padding:14px 18px;
  }
  .cert-inner{
    max-width:960px;
    margin:0 auto;
    display:flex;
    align-items:center;
    flex-wrap:wrap;
    gap:10px;
  }
  .cert-label{
    font-size:11px;
    letter-spacing:1.5px;
    text-transform:uppercase;
    color:var(--gold);
    font-weight:700;
    margin-right:4px;
  }
  .cert-badge{
    background:rgba(255,255,255,0.08);
    color:#fff;
    font-size:12px;
    font-weight:700;
    padding:5px 12px;
    border-radius:5px;
    letter-spacing:0.5px;
  }
  .warranty-seal{
    display:flex;
    align-items:center;
    gap:9px;
    margin-left:auto;
    padding:8px 13px;
    border:1px solid rgba(201,151,62,.75);
    border-radius:999px;
    background:rgba(201,151,62,.10);
    color:#fff;
  }
  .warranty-seal svg{
    width:29px;
    height:29px;
    flex:0 0 29px;
    stroke:var(--gold);
  }
  .warranty-seal strong{
    display:block;
    color:#fff;
    font-size:12px;
    line-height:1.15;
  }
  .warranty-seal span{
    display:block;
    color:rgba(255,255,255,.72);
    font-size:10px;
    line-height:1.2;
    margin-top:2px;
  }
  .cert-note{
    max-width:960px;
    margin:8px auto 0;
    font-size:11.5px;
    line-height:1.5;
    color:rgba(255,255,255,0.65);
  }

  /* TABS */
  .tabs-wrap{
    position:sticky;
    top:0;
    z-index:20;
    background:#fff;
    border-bottom:1px solid var(--line);
    box-shadow:0 2px 8px rgba(0,0,0,0.04);
  }
  .tabs{
    display:flex;
    max-width:960px;
    margin:0 auto;
  }
  .tab-btn{
    flex:1;
    background:none;
    border:none;
    padding:14px 3px;
    font-size:11px;
    font-weight:700;
    color:var(--gray);
    cursor:pointer;
    border-bottom:3px solid transparent;
    transition:all .2s ease;
    text-align:center;
    letter-spacing:0.1px;
  }
  .tab-btn.active{
    color:var(--navy);
    border-bottom-color:var(--gold);
  }
  .tab-btn:active{opacity:.7;}

  /* SECTIONS */
  .section{
    max-width:960px;
    margin:0 auto;
    padding:28px 18px 8px;
    display:none;
  }
  .section.active{display:block;}
  .section-intro{
    margin-bottom:22px;
  }
  .section-intro .eyebrow{
    font-size:11px;
    letter-spacing:1.5px;
    text-transform:uppercase;
    color:var(--gold);
    font-weight:700;
    margin-bottom:6px;
  }
  .section-intro h2{
    font-size:22px;
    color:var(--navy);
    font-weight:800;
    margin-bottom:6px;
  }
  .section-intro p{
    font-size:14px;
    color:var(--gray);
  }

  /* PRODUCT CARD */
  .product-card{
    background:#fff;
    border-radius:14px;
    border:1px solid var(--line);
    margin-bottom:22px;
    overflow:hidden;
  }
  .product-media{
    background:#fff;
    padding:16px;
    overflow:hidden;
    height:260px;
  }
  .product-media img{
    width:100%;
    height:100%;
    object-fit:contain;
    object-position:center;
    display:block;
  }
  .product-body{padding:18px 18px 20px;}
  .product-name{
    font-size:22px;
    font-weight:800;
    margin-bottom:4px;
    letter-spacing:-0.3px;
  }
  .product-name .pn-a{color:var(--navy);}
  .product-name .pn-b{color:var(--gold);font-weight:600;font-style:italic;}
  .product-tag{
    display:inline-block;
    font-size:11px;
    font-weight:700;
    color:var(--gold);
    text-transform:uppercase;
    letter-spacing:1px;
    margin-bottom:10px;
  }
  .product-desc{
    font-size:13.5px;
    color:var(--gray);
    margin-bottom:14px;
  }
  .feature-row{
    display:flex;
    flex-wrap:wrap;
    gap:8px;
    margin-bottom:14px;
  }
  .feature-pill{
    background:#F0F3F8;
    color:var(--navy);
    font-size:11.5px;
    font-weight:600;
    padding:6px 11px;
    border-radius:20px;
  }

  /* FLAME WATERMARK */
  .flame-mark{
    position:absolute;
    opacity:0.06;
    pointer-events:none;
  }
  .section-intro{position:relative;overflow:visible;}
  .section-intro .flame-mark{
    width:120px;
    top:-20px;
    right:-10px;
  }

  /* FLOW BAR VIZ */
  .flow-viz{
    margin-top:14px;
  }
  .flow-viz-label{
    font-size:11px;
    font-weight:700;
    color:var(--navy);
    text-transform:uppercase;
    letter-spacing:0.8px;
    margin-bottom:8px;
  }
  .flow-row{
    display:flex;
    align-items:center;
    gap:8px;
    margin-bottom:5px;
  }
  .flow-row .flow-model{
    font-size:10.5px;
    font-weight:700;
    color:var(--gray);
    width:64px;
    flex-shrink:0;
    text-align:right;
  }
  .flow-row .flow-bar-track{
    flex:1;
    height:9px;
    background:#EEF1F6;
    border-radius:5px;
    overflow:hidden;
  }
  .flow-row .flow-bar-fill{
    height:100%;
    background:linear-gradient(90deg,var(--navy),var(--gold));
    border-radius:5px;
  }

  /* SPEC TABLE */
  .spec-table{
    width:100%;
    border-collapse:collapse;
    font-size:12.5px;
    margin-top:6px;
  }
  .spec-table th{
    background:var(--navy);
    color:#fff;
    text-align:left;
    padding:9px 8px;
    font-weight:600;
    font-size:11.5px;
  }
  .spec-table th:first-child{border-radius:6px 0 0 0;}
  .spec-table th:last-child{border-radius:0 6px 0 0;}
  .spec-table td{
    padding:9px 8px;
    border-bottom:1px solid var(--line);
    color:var(--ink);
  }
  .spec-table tr:last-child td{border-bottom:none;}
  .spec-table tr:nth-child(even) td{background:#FAFBFC;}
  .spec-table .model-cell{font-weight:700;color:var(--navy);}

  .subgroup-label{
    font-size:12px;
    font-weight:700;
    color:var(--navy);
    margin:14px 0 6px;
    padding-top:10px;
    border-top:1px dashed var(--line);
  }
  .subgroup-label:first-of-type{border-top:none;padding-top:0;margin-top:2px;}

  /* INTERACTIVE TOGGLE */
  .toggle-group{margin-top:12px;}
  .toggle-buttons{
    display:flex;
    gap:8px;
    margin-bottom:0;
  }
  .toggle-btn{
    flex:1;
    background:#F0F3F8;
    color:var(--navy);
    border:1.5px solid transparent;
    border-radius:9px 9px 0 0;
    padding:11px 8px;
    font-size:12.5px;
    font-weight:700;
    cursor:pointer;
    text-align:center;
    transition:all .15s ease;
  }
  .toggle-btn.active{
    background:var(--navy);
    color:#fff;
  }
  .toggle-panel{
    display:none;
    background:#F7F8FA;
    border:1.5px solid var(--navy);
    border-top:none;
    border-radius:0 0 9px 9px;
    padding:14px;
    font-size:13px;
    color:var(--ink);
    line-height:1.55;
  }
  .toggle-panel.active{display:block;}
  .toggle-panel .tp-stat{
    display:inline-block;
    background:#fff;
    border:1px solid var(--line);
    color:var(--navy);
    font-weight:700;
    font-size:12px;
    padding:3px 10px;
    border-radius:6px;
    margin-top:8px;
  }

  /* FAQ ACCORDION */
  .faq-wrap{margin-top:8px;}
  .faq-item{
    border-bottom:1px solid var(--line);
  }
  .faq-item:first-child{border-top:1px solid var(--line);}
  .faq-q{
    width:100%;
    background:none;
    border:none;
    text-align:left;
    padding:14px 26px 14px 2px;
    font-size:14px;
    font-weight:700;
    color:var(--navy);
    cursor:pointer;
    position:relative;
    line-height:1.4;
  }
  .faq-q::after{
    content:'+';
    position:absolute;
    right:2px;
    top:50%;
    transform:translateY(-50%);
    font-size:20px;
    font-weight:400;
    color:var(--gold);
    transition:transform .2s ease;
  }
  .faq-q.open::after{
    content:'\2212';
  }
  .faq-a{
    display:none;
    padding:0 2px 16px;
    font-size:13.5px;
    color:var(--gray);
    line-height:1.6;
  }
  .faq-a.open{display:block;}
  .faq-a ul{margin:8px 0 0 18px;}
  .faq-a li{margin-bottom:4px;}

  /* GALLERY */
  .video-wrap{
    border-radius:14px;
    overflow:hidden;
    margin-top:8px;
    margin-bottom:18px;
    background:#000;
    max-width:380px;
    margin-left:auto;
    margin-right:auto;
  }
  .video-wrap video{
    width:100%;
    display:block;
  }

  /* SUBNAV CHIPS */
  .subnav-scroll{
    display:flex;
    gap:8px;
    overflow-x:auto;
    padding:2px 2px 8px;
    margin-bottom:6px;
    -webkit-overflow-scrolling:touch;
    scrollbar-width:none;
  }
  .subnav-scroll::-webkit-scrollbar{display:none;}
  .subnav-chip{
    flex:0 0 auto;
    background:#fff;
    border:1.5px solid var(--line);
    color:var(--navy);
    font-size:12.5px;
    font-weight:700;
    padding:8px 15px;
    border-radius:20px;
    text-decoration:none;
    white-space:nowrap;
  }
  .subnav-chip:active{background:var(--navy);color:#fff;border-color:var(--navy);}
  .product-card{scroll-margin-top:58px;}

  .gallery-grid{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:10px;
    margin-top:8px;
  }
  .gallery-item{
    border-radius:10px;
    overflow:hidden;
    position:relative;
    background:#000;
  }
  .gallery-item img{
    width:100%;
    height:150px;
    object-fit:cover;
    display:block;
  }
  .gallery-caption{
    position:absolute;
    bottom:0;
    left:0;
    right:0;
    background:linear-gradient(0deg, rgba(8,28,61,0.92), transparent);
    color:#fff;
    font-size:10.5px;
    font-weight:700;
    padding:16px 8px 6px;
    line-height:1.3;
  }
  @media (min-width:600px){
    .gallery-grid{grid-template-columns:1fr 1fr 1fr;}
    .gallery-item img{height:180px;}
  }

  .cta-row{
    display:flex;
    gap:10px;
    margin-top:16px;
  }
  .btn-primary{
    flex:1;
    background:var(--navy);
    color:#fff;
    border:none;
    border-radius:8px;
    padding:12px 14px;
    font-size:13.5px;
    font-weight:700;
    text-align:center;
    text-decoration:none;
    display:block;
  }
  .btn-primary:active{opacity:.85;}

  /* HERO CTA */
  .hero-cta-row{
    display:flex;
    gap:10px;
    margin-top:18px;
    flex-wrap:wrap;
  }
  .hero-btn-primary{
    background:var(--gold);
    color:var(--navy-dark);
    border:none;
    border-radius:8px;
    padding:13px 20px;
    font-size:14px;
    font-weight:800;
    text-align:center;
    text-decoration:none;
    display:inline-block;
  }
  .hero-btn-primary:active{opacity:.85;}
  .hero-btn-secondary{
    background:rgba(255,255,255,0.08);
    color:#fff;
    border:1.5px solid rgba(255,255,255,0.4);
    border-radius:8px;
    padding:12px 20px;
    font-size:14px;
    font-weight:700;
    text-align:center;
    text-decoration:none;
    display:inline-block;
  }
  .hero-btn-secondary:active{opacity:.7;}

  /* FOOTER */
  .footer{
    max-width:960px;
    margin:20px auto 0;
    padding:24px 18px 40px;
    text-align:center;
    border-top:1px solid var(--line);
  }
  .footer .brand{
    font-size:13px;
    font-weight:800;
    color:var(--navy);
    letter-spacing:2px;
    margin-bottom:6px;
  }
  .footer p{
    font-size:12px;
    color:var(--gray);
  }

  /* ===== CONFIGURADOR ===== */
  .cfg-badge{
    display:inline-block;
    background:var(--gold);
    color:var(--navy-dark);
    font-size:10px;
    font-weight:800;
    letter-spacing:0.5px;
    text-transform:uppercase;
    padding:2px 8px;
    border-radius:20px;
    margin-left:6px;
    vertical-align:middle;
  }

  /* schematic */
  .cfg-schematic{
    display:flex;
    align-items:flex-start;
    overflow-x:auto;
    padding:10px 4px 18px;
    -webkit-overflow-scrolling:touch;
    scrollbar-width:none;
  }
  .cfg-schematic::-webkit-scrollbar{display:none;}
  .cfg-node{
    display:flex;
    flex-direction:column;
    align-items:center;
    flex:0 0 auto;
    width:52px;
  }
  .cfg-node-dot{
    width:30px;
    height:30px;
    border-radius:50%;
    background:#fff;
    border:2px solid var(--line);
    display:flex;
    align-items:center;
    justify-content:center;
    transition:all .35s ease;
    flex-shrink:0;
  }
  .cfg-node-dot svg{width:14px;height:14px;stroke:var(--gray);transition:stroke .35s ease;}
  .cfg-node.is-active .cfg-node-dot{
    border-color:var(--gold);
    box-shadow:0 0 0 4px rgba(201,151,62,0.18);
  }
  .cfg-node.is-done .cfg-node-dot{
    background:var(--navy);
    border-color:var(--navy);
  }
  .cfg-node.is-done .cfg-node-dot svg{stroke:#fff;}
  .cfg-node-label{
    font-size:9.5px;
    font-weight:700;
    color:var(--gray);
    margin-top:6px;
    text-align:center;
    line-height:1.2;
    transition:color .35s ease;
  }
  .cfg-node.is-done .cfg-node-label,
  .cfg-node.is-active .cfg-node-label{color:var(--navy);}
  .cfg-pipe{
    flex:1 1 auto;
    height:3px;
    min-width:10px;
    background:var(--line);
    margin-top:16px;
    position:relative;
    overflow:hidden;
    border-radius:2px;
  }
  .cfg-pipe.is-done{background:var(--gold);}
  .cfg-pipe.is-done::after{
    content:'';
    position:absolute;
    inset:0;
    background:linear-gradient(90deg,transparent,rgba(255,255,255,.85),transparent);
    animation:cfgSweep .8s ease;
  }
  @keyframes cfgSweep{
    from{transform:translateX(-120%);}
    to{transform:translateX(120%);}
  }

  /* step card */
  .cfg-card{
    background:#fff;
    border:1px solid var(--line);
    border-radius:14px;
    padding:22px 18px;
    min-height:280px;
    display:flex;
    flex-direction:column;
  }
  .cfg-step-top{
    display:flex;
    align-items:center;
    gap:10px;
    margin-bottom:4px;
    min-height:22px;
  }
  .cfg-back{
    background:none;
    border:none;
    color:var(--navy);
    font-size:12px;
    font-weight:700;
    cursor:pointer;
    padding:4px 0;
    display:flex;
    align-items:center;
    gap:3px;
  }
  .cfg-step-count{
    font-size:11px;
    font-weight:700;
    letter-spacing:1px;
    text-transform:uppercase;
    color:var(--gold);
  }
  .cfg-step h3{
    font-size:19px;
    font-weight:800;
    color:var(--navy);
    margin:8px 0 18px;
    line-height:1.3;
  }
  .cfg-options{
    display:flex;
    flex-direction:column;
    gap:10px;
  }
  .cfg-option{
    display:flex;
    align-items:center;
    justify-content:space-between;
    background:#F7F8FA;
    border:1.5px solid var(--line);
    border-radius:10px;
    padding:15px 16px;
    font-size:14.5px;
    font-weight:700;
    color:var(--navy);
    text-align:left;
    cursor:pointer;
    transition:all .15s ease;
  }
  .cfg-option:active{transform:scale(0.98);}
  .cfg-option.is-selected{
    background:var(--navy);
    border-color:var(--navy);
    color:#fff;
  }
  .cfg-option-desc{
    display:block;
    font-size:11.5px;
    font-weight:500;
    color:var(--gray);
    margin-top:2px;
  }
  .cfg-option.is-selected .cfg-option-desc{color:#C7D3E8;}
  .cfg-option .cfg-chevron{
    font-size:18px;
    color:var(--gold);
    flex-shrink:0;
    margin-left:10px;
  }

  /* slider step */
  .cfg-volume-display{
    text-align:center;
    margin-bottom:22px;
  }
  .cfg-volume-num{
    font-size:44px;
    font-weight:800;
    color:var(--navy);
    letter-spacing:-1px;
  }
  .cfg-volume-unit{
    font-size:15px;
    font-weight:700;
    color:var(--gold);
    margin-left:4px;
  }
  .cfg-slider{
    width:100%;
    accent-color:var(--gold);
    height:6px;
    margin:8px 0 6px;
  }
  .cfg-slider-labels{
    display:flex;
    justify-content:space-between;
    font-size:11px;
    color:var(--gray);
    font-weight:600;
    margin-bottom:24px;
  }
  .cfg-continue{
    margin-top:auto;
    background:var(--gold);
    color:var(--navy-dark);
    border:none;
    border-radius:10px;
    padding:14px;
    font-size:14.5px;
    font-weight:800;
    cursor:pointer;
    width:100%;
  }
  .cfg-continue:active{opacity:.85;}

  /* result step */
  .cfg-result-intro{
    font-size:13px;
    color:var(--gray);
    margin-bottom:16px;
    line-height:1.55;
  }
  .cfg-result-list{
    display:flex;
    flex-direction:column;
    gap:10px;
    margin-bottom:18px;
  }
  .cfg-result-row{
    background:#F7F8FA;
    border-radius:10px;
    padding:12px 14px;
    border-left:3px solid var(--gold);
  }
  .cfg-result-label{
    font-size:10.5px;
    font-weight:700;
    text-transform:uppercase;
    letter-spacing:0.5px;
    color:var(--gold);
    margin-bottom:3px;
  }
  .cfg-result-value{
    font-size:14px;
    font-weight:700;
    color:var(--navy);
    line-height:1.4;
  }
  .cfg-result-sub{
    font-size:11.5px;
    color:var(--gray);
    margin-top:2px;
    line-height:1.4;
  }
  .cfg-note{
    font-size:10.5px;
    color:var(--gray);
    line-height:1.5;
    margin-bottom:16px;
    padding:10px 12px;
    background:#FAFBFC;
    border-radius:8px;
    border:1px dashed var(--line);
  }
  .cfg-restart{
    background:none;
    border:none;
    color:var(--gray);
    font-size:12.5px;
    font-weight:700;
    text-decoration:underline;
    cursor:pointer;
    margin:14px auto 0;
    display:block;
  }

  @media (min-width:600px){
    .hero h1{font-size:36px;}
    .product-media{height:320px;}
  }

  @media (min-width:1024px){
    .cfg-schematic{overflow-x:visible;justify-content:center;}
    .cfg-node{width:76px;}
    .cfg-card{max-width:560px;margin:0 auto;padding:32px 36px;}
    .cfg-volume-num{font-size:56px;}
  }

  /* CATEGORY SUMMARY (index) */
  .cat-summary{max-width:960px;margin:0 auto;padding:0 18px 8px;}
  .cat-summary-media{
    border-radius:14px;
    overflow:hidden;
    background:#fff;
    border:1px solid var(--line);
    height:280px;
    padding:16px;
    margin-bottom:16px;
  }
  .cat-summary-media img{
    width:100%;
    height:100%;
    object-fit:contain;
    object-position:center;
    display:block;
  }
  .cat-summary .feature-row{margin-bottom:18px;}
  .cat-summary-cta{display:block;text-decoration:none;text-align:center;}
  .pump-line-grid{
    display:grid;
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:10px;
    margin-bottom:18px;
  }
  .pump-line-card{
    overflow:hidden;
    border:1px solid var(--line);
    border-radius:12px;
    background:#fff;
    color:var(--navy);
    text-decoration:none;
    box-shadow:0 5px 18px rgba(8,28,61,.06);
  }
  .pump-line-card img{
    display:block;
    width:100%;
    aspect-ratio:1/1;
    object-fit:contain;
    object-position:center;
    padding:8px;
    background:#fff;
  }
  .pump-line-card div{padding:10px 11px 12px;}
  .pump-line-card strong{display:block;font-size:14px;line-height:1.2;}
  .pump-line-card span{display:block;margin-top:3px;font-size:11px;color:var(--gray);}
  @media (min-width:1024px){
    .cat-summary{max-width:1240px;}
    .cat-summary-media{height:380px;}
    .pump-line-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;}
  }

  /* DESKTOP WIDE LAYOUT */
  @media (min-width:1024px){
    .why-inner,
    .cert-inner,
    .tabs,
    .section{
      max-width:1240px;
    }
    .hero-overlay{
      max-width:1240px;
      margin:0 auto;
      padding-left:40px;
      padding-right:40px;
    }
    .footer{
      max-width:1240px;
    }
    .hero h1{font-size:44px;}
    .hero p{font-size:17px;max-width:640px;}
    .why-inner{grid-template-columns:repeat(3,1fr);}
    .gallery-grid{grid-template-columns:repeat(4,1fr);}
    .product-card{
      display:grid;
      grid-template-columns:340px 1fr;
      align-items:stretch;
    }
    .product-media{
      min-height:360px;
      height:100%;
    }
  }

  @media (max-width:639px){
    .warranty-seal{
      width:100%;
      margin:4px 0 0;
      border-radius:10px;
    }
  }