.rc-boilers{--b-blue:#1958e3;--b-navy:#102b4b;--b-green:#138a87;--b-ink:#34465d;--b-line:#dfe7f1;--b-soft:#f4f7fb;max-width:1240px;margin:0 auto;padding:22px 28px 64px;color:var(--b-navy)}
.rc-boilers *{box-sizing:border-box}.rc-boilers a{text-decoration:none}.rc-boilers svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}.rc-boilers button,.rc-boilers input,.rc-boilers select{font:inherit}.rc-boilers :is(a,button,input,select,summary):focus-visible{outline:2px solid var(--b-blue);outline-offset:4px}.rc-boiler-breadcrumb{display:flex;align-items:center;gap:10px;flex-wrap:wrap;font-size:12px;color:#62738a;margin-bottom:26px}.rc-boiler-breadcrumb a{color:#425a76}.rc-boiler-catalog-head{display:flex;align-items:flex-end;justify-content:space-between;gap:30px;padding-bottom:28px}.rc-boiler-eyebrow{font-size:12px;font-weight:700;color:var(--b-green);margin:0 0 8px;letter-spacing:.06em;text-transform:uppercase}.rc-boiler-catalog-head h1{font-size:clamp(27px,3vw,39px);line-height:1.15;letter-spacing:-1.1px;max-width:610px;margin:0 0 12px;font-weight:750}.rc-boiler-catalog-head p:not(.rc-boiler-eyebrow){font-size:14px;line-height:1.65;color:var(--b-ink);margin:0;max-width:600px}.rc-boiler-help-link{display:flex;gap:10px;align-items:center;color:var(--b-blue);font-size:13px;font-weight:650;white-space:nowrap;padding-bottom:5px}.rc-boiler-filters{display:flex;align-items:flex-end;gap:14px;background:var(--b-soft);border:1px solid var(--b-line);border-radius:12px;padding:18px}.rc-boiler-filters label{display:flex;flex-direction:column;gap:6px;min-width:200px}.rc-boiler-filters label>span{font-size:12px;font-weight:650}.rc-boiler-filter-search{flex:1}.rc-boiler-filters select,.rc-boiler-filters input{width:100%;min-width:0;height:44px;background:#fff;color:var(--b-navy);border:1px solid #bac9dc;border-radius:7px;padding:0 12px;font-size:14px}.rc-boiler-filters button,.rc-boiler-primary{display:inline-flex;gap:12px;align-items:center;justify-content:center;min-height:44px;padding:11px 20px;border:1px solid var(--b-blue);border-radius:7px;background:var(--b-blue);color:#fff;font-size:14px;font-weight:650;cursor:pointer}.rc-boiler-filters button:hover,.rc-boiler-primary:hover{background:#154abd;color:#fff}.rc-boiler-reset{font-size:12px;color:var(--b-blue);padding:13px 0;white-space:nowrap}.rc-boiler-results{display:flex;align-items:center;justify-content:space-between;gap:16px;font-size:12px;color:#566b84;padding:16px 0}.rc-boiler-results p{margin:0}.rc-boiler-results strong{color:var(--b-navy)}.rc-boiler-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.rc-boiler-card{display:flex;flex-direction:column;min-width:0;border:1px solid var(--b-line);border-radius:12px;background:white;overflow:hidden;transition:border-color .18s,box-shadow .18s}.rc-boiler-card:hover{border-color:#a9c0ef;box-shadow:0 5px 18px #102b4b0b}.rc-boiler-card-photo{display:flex;align-items:center;justify-content:center;height:208px;padding:16px;background:#fff}.rc-boiler-card-photo img{height:100%;width:100%;object-fit:contain}.rc-boiler-card-body{padding:0 16px 16px;display:flex;flex-direction:column;flex:1;min-width:0}.rc-boiler-brand{font-size:11px;color:var(--b-green);font-weight:700;letter-spacing:.035em;text-transform:uppercase}.rc-boiler-card h2{font-size:14px;line-height:1.45;font-weight:650;min-height:41px;margin:5px 0 14px;overflow-wrap:anywhere}.rc-boiler-card h2 a{color:var(--b-navy);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.rc-boiler-card-facts{display:flex;flex-direction:column;gap:7px;margin:0 0 17px;font-size:11px;line-height:1.4}.rc-boiler-card-facts>div{display:grid;grid-template-columns:minmax(0,1.7fr) minmax(0,1fr);gap:8px}.rc-boiler-card-facts dt{color:#526780;overflow-wrap:anywhere}.rc-boiler-card-facts dd{margin:0;color:var(--b-navy);font-weight:650;text-align:right}.rc-boiler-card-bottom{margin-top:auto;display:flex;gap:12px;align-items:center;justify-content:space-between;padding-top:13px;border-top:1px solid #e9eef5}.rc-boiler-price{font-variant-numeric:tabular-nums;font-size:24px;letter-spacing:-.6px;line-height:1.15;font-weight:750;color:var(--b-blue);white-space:nowrap}.rc-boiler-price-note{font-size:10px;display:block;color:#5b6d84;margin-top:3px}.rc-boiler-card-action{display:inline-flex;align-items:center;gap:5px;font-size:11px;color:var(--b-blue);font-weight:650;white-space:nowrap;min-height:40px}.rc-boiler-card-action svg{width:16px}.rc-boiler-empty{padding:60px 20px;text-align:center;border:1px solid var(--b-line);border-radius:12px}.rc-boiler-empty h2{font-size:22px}.rc-boiler-empty p{color:var(--b-ink);font-size:14px;margin:12px 0 24px}
.rc-boiler-product-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);gap:54px;align-items:start}.rc-boiler-gallery{position:sticky;top:calc(var(--chrome-visible-height,100px) + 20px);min-width:0}.rc-boiler-main-photo{display:block;position:relative;width:100%;height:460px;max-height:55vw;min-height:260px;border:1px solid var(--b-line);border-radius:14px;background:#fff;padding:30px;cursor:zoom-in;color:#4b6582}.rc-boiler-main-photo img{width:100%;height:100%;object-fit:contain}.rc-boiler-main-photo>span{display:flex;align-items:center;gap:5px;position:absolute;right:14px;bottom:12px;font-size:12px;background:#fff;padding:4px 7px;border-radius:4px}.rc-boiler-main-photo>span svg{width:16px;height:16px}.rc-boiler-image-note{font-size:11px;color:#566b84;margin:8px 0;text-align:center}.rc-boiler-purchase{padding:5px 0}.rc-boiler-purchase>.rc-boiler-brand{margin:0 0 8px;font-size:12px}.rc-boiler-purchase h1{font-size:clamp(25px,2.5vw,34px);line-height:1.2;letter-spacing:-.75px;font-weight:750;margin:0 0 12px;overflow-wrap:anywhere}.rc-boiler-reference{font-size:12px;color:#4e6580;margin:0 0 7px}.rc-boiler-reference strong{font-weight:600;color:var(--b-navy);margin-left:5px}.rc-boiler-key-facts{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;border-top:1px solid var(--b-line);border-bottom:1px solid var(--b-line);padding:17px 0;margin:22px 0}.rc-boiler-key-facts dt{font-size:12px;line-height:1.5;color:#536b85;margin-bottom:5px}.rc-boiler-key-facts dd{font-size:19px;font-weight:700;letter-spacing:-.25px;margin:0}.rc-boiler-price-line{display:flex;align-items:center;gap:17px;margin:22px 0 12px}.rc-boiler-price-line>.rc-boiler-price{font-size:37px;letter-spacing:-1px}.rc-boiler-price-line>div{font-size:12px;color:#536b85;line-height:1.5}.rc-boiler-price-line small{display:block;font-size:11px}.rc-boiler-availability{display:flex;align-items:center;gap:7px;font-size:12px;color:#486077;margin:0 0 20px}.rc-boiler-availability>span{width:7px;height:7px;border:1.5px solid #627995;border-radius:50%;flex-shrink:0}.rc-boiler-purchase>.rc-boiler-primary{display:flex;width:100%;min-height:48px;background:var(--b-green);border-color:var(--b-green)}.rc-boiler-purchase>.rc-boiler-primary:hover{background:#0d716e}.rc-boiler-purchase-note{font-size:12px;line-height:1.6;color:#566b84;margin:10px 0 0}.rc-boiler-variant-note{font-size:12px;line-height:1.6;color:#5b5e41;padding:10px 12px;background:#faf9f1;border-radius:6px;margin:10px 0}.rc-boiler-tech-link{font-size:12px;color:var(--b-blue);display:inline-block;margin:18px 0 0}.rc-boiler-overview{border-top:1px solid var(--b-line);padding:30px 0;margin-top:34px;display:grid;grid-template-columns:240px 1fr;gap:40px}.rc-boiler-overview h2,.rc-boiler-section-head h2,.rc-boiler-faq h2{font-size:23px;letter-spacing:-.5px;margin:0;font-weight:700}.rc-boiler-overview p{margin:0;font-size:14px;line-height:1.8;color:var(--b-ink)}.rc-boiler-spec-section{scroll-margin-top:calc(var(--chrome-visible-height,100px) + 20px)}.rc-boiler-section-head{display:flex;align-items:center;justify-content:space-between;gap:15px;margin:8px 0 18px}.rc-boiler-section-head>span{font-size:12px;color:#536b85}.rc-boiler-spec-groups{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;align-items:start}.rc-boiler-spec-group{border:1px solid var(--b-line);border-radius:9px;overflow:hidden}.rc-boiler-spec-group h3{font-size:14px;font-weight:650;margin:0;padding:13px 17px;background:var(--b-soft)}.rc-boiler-spec-group dl{margin:0;padding:0 17px}.rc-boiler-spec-group dl>div{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(0,1fr);gap:18px;padding:11px 0;border-top:1px solid #e7edf4;font-size:12px;line-height:1.6}.rc-boiler-spec-group dt{color:#4a617b}.rc-boiler-spec-group dd{margin:0;font-weight:550;color:var(--b-navy);overflow-wrap:anywhere}.rc-boiler-source-link{color:var(--b-blue);display:inline-block;min-width:22px;text-align:center}.rc-boiler-documents{border:1px solid var(--b-line);border-radius:8px;margin-top:18px}.rc-boiler-documents>summary{padding:15px 18px;cursor:pointer;font-size:13px;font-weight:650;list-style:revert}.rc-boiler-documents>summary>span{font-size:12px;color:#60748c;font-weight:400;margin-left:10px}.rc-boiler-documents ul{list-style:none;padding:0 18px 16px;margin:0}.rc-boiler-documents li+li{margin-top:12px}.rc-boiler-documents a{color:var(--b-blue);font-size:13px;overflow-wrap:anywhere}.rc-boiler-documents a>span{color:#526780;font-size:11px}.rc-boiler-faq{margin-top:35px;max-width:900px}.rc-boiler-faq h2{margin-bottom:15px}.rc-boiler-faq details{border-bottom:1px solid var(--b-line);padding:0}.rc-boiler-faq summary{font-size:14px;font-weight:600;padding:17px 0;cursor:pointer;line-height:1.5;list-style:revert}.rc-boiler-faq details p{font-size:14px;line-height:1.8;color:var(--b-ink);margin:0;padding:0 0 18px}
.rc-boiler-photo-dialog{color:#102b4b;border:0;border-radius:14px;padding:0;width:min(900px,calc(100vw - 24px));max-width:calc(100vw - 24px);max-height:calc(100dvh - 24px);background:#fff;box-shadow:0 22px 90px #0004;margin:auto;overflow:hidden}.rc-boiler-photo-dialog[open]{display:grid;grid-template-rows:auto minmax(0,1fr) auto;height:min(790px,calc(100dvh - 24px))}.rc-boiler-photo-dialog::backdrop{background:#10243dd1}.rc-boiler-photo-head{display:flex;gap:16px;align-items:center;justify-content:space-between;padding:15px 20px;border-bottom:1px solid #dfe7f1}.rc-boiler-photo-head h2{font-size:15px;line-height:1.5;font-weight:650;margin:0;overflow-wrap:anywhere}.rc-boiler-photo-head button{border:0;border-radius:50%;width:40px;height:40px;background:#f1f5fb;color:#102b4b;flex-shrink:0;display:grid;place-items:center;cursor:pointer}.rc-boiler-photo-stage{overflow:auto;min-height:0;background:white;text-align:center}.rc-boiler-photo-stage img{display:block;width:100%;height:100%;object-fit:contain;cursor:zoom-in}.rc-boiler-photo-dialog[data-zoomed=true] .rc-boiler-photo-stage img{width:max(800px,145%);height:auto;max-width:none;max-height:none;object-fit:contain;cursor:zoom-out}.rc-boiler-photo-controls{display:flex;align-items:center;justify-content:space-between;gap:15px;padding:12px 20px;border-top:1px solid #dfe7f1}.rc-boiler-photo-controls button{display:flex;align-items:center;gap:7px;border:1px solid #bac9dc;color:#1958e3;background:white;padding:8px 12px;border-radius:6px;min-height:40px;font-size:12px;cursor:pointer}.rc-boiler-photo-controls>span{font-size:11px;color:#526780;text-align:right}
@media(min-width:1450px){.rc-boiler-card-photo{height:220px}}
@media(max-width:1050px){.rc-boiler-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.rc-boiler-help-link{display:none}.rc-boiler-product-layout{gap:30px}.rc-boiler-main-photo{height:400px}.rc-boiler-overview{grid-template-columns:200px 1fr;gap:25px}}
@media(max-width:760px){.rc-boilers{padding:18px 18px 40px}.rc-boiler-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.rc-boiler-catalog-head{padding-bottom:22px}.rc-boiler-catalog-head h1{font-size:30px;max-width:500px}.rc-boiler-filters{display:grid;grid-template-columns:1fr 1fr;gap:12px;padding:14px}.rc-boiler-filters label{min-width:0}.rc-boiler-filters input,.rc-boiler-filters select{font-size:16px}.rc-boiler-filters button{grid-column:2;grid-row:2}.rc-boiler-results{font-size:11px;align-items:flex-start}.rc-boiler-results>p:last-child{max-width:180px;text-align:right}.rc-boiler-card-body{padding:0 12px 12px}.rc-boiler-card-photo{height:190px;padding:12px}.rc-boiler-card-facts>div{grid-template-columns:1fr}.rc-boiler-card-facts dd{text-align:left}.rc-boiler-card-bottom{gap:8px;align-items:flex-start;flex-wrap:wrap}.rc-boiler-card-bottom .rc-boiler-price{font-size:22px}.rc-boiler-card-action{margin-left:auto;min-height:32px}.rc-boiler-product-layout{grid-template-columns:1fr;gap:22px}.rc-boiler-gallery{position:static}.rc-boiler-main-photo{height:330px;max-height:none;min-height:0;padding:20px}.rc-boiler-purchase h1{font-size:28px;letter-spacing:-.6px}.rc-boiler-key-facts{margin:18px 0}.rc-boiler-purchase .rc-boiler-price-line{margin-top:18px}.rc-boiler-overview{display:block;margin-top:28px;padding:25px 0}.rc-boiler-overview h2{margin-bottom:12px}.rc-boiler-section-head{display:block}.rc-boiler-section-head>span{display:block;margin-top:7px}.rc-boiler-spec-groups{grid-template-columns:1fr;gap:14px}.rc-boiler-photo-head{padding:12px}.rc-boiler-photo-controls{padding:12px}.rc-boiler-photo-controls>span{max-width:140px}.rc-boiler-photo-head h2{font-size:13px}}
@media(max-width:390px){.rc-boilers{padding-left:12px;padding-right:12px}.rc-boiler-grid{gap:9px}.rc-boiler-card-photo{height:160px}.rc-boiler-card-body{padding-left:10px;padding-right:10px}.rc-boiler-card h2{font-size:13px;min-height:38px}.rc-boiler-card-bottom .rc-boiler-price{font-size:22px}.rc-boiler-card-bottom{flex-direction:column;gap:2px}.rc-boiler-card-action{margin-left:0;font-size:12px}.rc-boiler-filters{padding:12px;gap:10px}.rc-boiler-catalog-head h1{font-size:27px}.rc-boiler-key-facts{gap:12px}.rc-boiler-key-facts dd{font-size:17px}.rc-boiler-spec-group dl>div{gap:12px}.rc-boiler-photo-controls{align-items:flex-start}.rc-boiler-photo-controls>span{max-width:110px}}
@media(prefers-reduced-motion:reduce){.rc-boiler-card{transition:none}}

/* V17 keeps the compact catalogue while making the complete technical record readable. */
.rc-boilers-v17{--b-green:#0b7c70}
.rc-boilers-v17 .rc-boiler-breadcrumb{margin-bottom:20px}
.rc-boilers-v17 .rc-boiler-main-photo{height:400px;padding:22px}
.rc-boilers-v17 .rc-boiler-product-layout{gap:38px}
.rc-boilers-v17 .rc-boiler-purchase h1{font-size:clamp(25px,2.25vw,32px)}
.rc-boilers-v17 .rc-boiler-key-facts{margin:18px 0;padding:14px 0}
.rc-boilers-v17 .rc-boiler-section-links{display:flex;flex-wrap:wrap;gap:8px 20px;margin:18px 0 0}
.rc-boiler-section-links a{display:inline-flex;align-items:center;min-height:36px;font-size:13px;font-weight:650;color:var(--b-blue);border-bottom:1px solid #bad0f7}
.rc-boilers-v17 .rc-boiler-overview{margin-top:24px;padding:26px 0;gap:24px;grid-template-columns:240px minmax(0,1fr)}
.rc-boilers-v17 .rc-boiler-overview p+p{margin-top:10px}
.rc-boilers-v17 .rc-boiler-spec-group dl>div{font-size:13px;padding:10px 0;gap:16px;grid-template-columns:minmax(0,1.2fr) minmax(0,1fr)}
.rc-boilers-v17 .rc-boiler-spec-group dt{overflow-wrap:anywhere}
.rc-boilers-v17 .rc-boiler-spec-group h3{padding:12px 17px}
.rc-boilers-v17 :is(.rc-boiler-spec-section,.rc-boiler-document-section,.rc-boiler-faq){scroll-margin-top:calc(var(--chrome-visible-height,100px) + 22px)}
.rc-boiler-evidence-notes ul{font-size:12px;line-height:1.65;color:#53677f;list-style:disc;padding-left:36px}
.rc-boiler-evidence-notes li{overflow-wrap:anywhere}
.rc-boiler-configuration{margin:26px 0;padding:20px 22px;background:var(--b-soft);border:1px solid var(--b-line);border-radius:10px}
.rc-boiler-configuration h2,.rc-boiler-related h2{font-size:22px;line-height:1.3;margin:0 0 12px;letter-spacing:-.3px}
.rc-boiler-configuration p,.rc-boiler-configuration li,.rc-boiler-related>p{font-size:13px;line-height:1.75;color:var(--b-ink);margin:8px 0}
.rc-boiler-configuration-label{display:block;color:var(--b-navy);font-weight:650;margin-bottom:3px}
.rc-boiler-configuration a{color:var(--b-blue)}
.rc-boiler-configuration ul{padding-left:20px;margin-bottom:0}
.rc-boiler-document-section{margin-top:28px}
.rc-boiler-document-grid{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.rc-boiler-document-grid li{border:1px solid var(--b-line);border-radius:9px;min-width:0;background:#fff}
.rc-boiler-document-main{display:flex;align-items:center;gap:12px;padding:15px;color:var(--b-navy);font-size:13px;font-weight:600;line-height:1.5;min-height:78px}
.rc-boiler-document-main>span:nth-child(2){flex:1;overflow-wrap:anywhere;min-width:0}
.rc-boiler-document-main>span:last-child{color:var(--b-blue)}
.rc-boiler-document-main small{display:block;font-size:11px;font-weight:400;color:#526780;margin-top:4px}
.rc-boiler-filetype{display:grid;place-items:center;font-size:10px;letter-spacing:.02em;flex-shrink:0;width:39px;height:46px;border:1px solid #c3d4f2;border-radius:5px;color:var(--b-blue);background:#f4f7ff}
.rc-boiler-document-main:hover{color:var(--b-blue);background:#f7faff}
.rc-boiler-document-origin{padding:0 15px 13px 66px;font-size:11px;color:#526780}
.rc-boiler-document-origin a{color:#48638a;display:inline-flex;align-items:center;min-height:28px}
.rc-boilers-v17 .rc-boiler-faq{max-width:none;margin-top:34px}
.rc-boilers-v17 .rc-boiler-faq summary{font-size:14px;padding:15px 0}
.rc-boilers-v17 .rc-boiler-faq h2{font-size:24px;line-height:1.35;max-width:880px}
.rc-boilers-v17 .rc-boiler-faq-answer{max-width:940px;padding-bottom:17px}
.rc-boilers-v17 .rc-boiler-faq-answer p{padding-bottom:0}
.rc-boiler-faq-sources{display:flex;flex-wrap:wrap;gap:7px 16px;font-size:12px;margin-top:9px}
.rc-boiler-faq-sources a{color:var(--b-blue);min-height:28px;display:inline-flex;align-items:center}
.rc-boiler-guide-link a{display:inline-flex;align-items:center;gap:8px;color:var(--b-blue);font-weight:600;min-height:44px}
.rc-boiler-related{margin-top:30px;border-top:1px solid var(--b-line);padding-top:26px}
.rc-boiler-related .rc-boiler-grid{grid-template-columns:repeat(3,minmax(0,1fr));margin-top:18px;max-width:920px}
.rc-boilers-v17 .rc-boiler-card-facts{font-size:12px;gap:6px;margin-bottom:14px}
.rc-boilers-v17 .rc-boiler-card h2 a{display:block;overflow:visible;-webkit-line-clamp:unset}
.rc-boilers-v17 .rc-boiler-card-action{font-size:12px;min-height:40px}
.rc-boilers-v17 .rc-boiler-card-photo{height:200px}
@media(max-width:1050px){.rc-boilers-v17 .rc-boiler-product-layout{gap:26px}.rc-boilers-v17 .rc-boiler-main-photo{height:360px}.rc-boilers-v17 .rc-boiler-overview{grid-template-columns:190px minmax(0,1fr)}}
@media(max-width:760px){.rc-boilers-v17 .rc-boiler-main-photo{height:290px}.rc-boilers-v17 .rc-boiler-product-layout{gap:18px}.rc-boilers-v17 .rc-boiler-overview{display:block}.rc-boiler-document-grid{grid-template-columns:1fr}.rc-boiler-configuration{padding:16px}.rc-boilers-v17 .rc-boiler-card-photo{height:175px}.rc-boiler-related .rc-boiler-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.rc-boilers-v17 .rc-boiler-spec-group dl>div{font-size:12px;gap:12px}}
@media(max-width:390px){.rc-boilers-v17 .rc-boiler-main-photo{height:270px}.rc-boilers-v17 .rc-boiler-card-photo{height:155px}.rc-boilers-v17 .rc-boiler-purchase h1{font-size:26px}.rc-boilers-v17 .rc-boiler-card-facts{font-size:11px}.rc-boiler-document-main{padding:12px;gap:10px}.rc-boiler-document-origin{padding-left:61px}.rc-boilers-v17 .rc-boiler-faq h2{font-size:22px}.rc-boiler-section-links{gap:8px 14px}}
@media(max-width:300px){.rc-boilers-v17 .rc-boiler-filters{grid-template-columns:1fr}.rc-boilers-v17 .rc-boiler-filters button{grid-column:auto;grid-row:auto}.rc-boilers-v17 .rc-boiler-grid{grid-template-columns:1fr}.rc-boilers-v17 .rc-boiler-card-photo{height:190px}.rc-boilers-v17 .rc-boiler-results>p:last-child{max-width:110px}.rc-boilers-v17 .rc-boiler-spec-group dl>div{grid-template-columns:1fr;gap:4px}.rc-boiler-related .rc-boiler-grid{grid-template-columns:1fr}}