:root{
  --bg:#0d1011;--bg2:#131718;--panel:#191e1f;--text:#f4f6f4;--muted:#a4acab;
  --line:rgba(255,255,255,.09);--accent:#b8e83e;--accent2:#d5ff68;--dark:#111;
  --max:1240px;--radius:22px
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#f5f7f4;color:#121616;font-family:Manrope,Arial,sans-serif;line-height:1.55}a{color:inherit;text-decoration:none}
.container{width:min(calc(100% - 40px),var(--max));margin:auto}.topline{background:#080a0a;color:#9fa7a4;text-align:center;padding:9px;font-size:12px}.topline a{color:var(--accent);font-weight:700}
.header{position:sticky;top:0;z-index:50;background:rgba(13,16,17,.92);backdrop-filter:blur(14px);border-bottom:1px solid var(--line);color:#fff}.nav{min-height:76px;display:flex;align-items:center;gap:28px}.logo{font-size:24px;font-weight:800;letter-spacing:-1.2px;white-space:nowrap}.logo span{display:inline-grid;place-items:center;background:var(--accent);color:#111;border-radius:8px;width:31px;height:31px;margin-right:4px}.menu{display:flex;gap:22px;margin-left:auto}.menu a{font-size:13px;color:#c4cbca;transition:.2s}.menu a:hover{color:var(--accent)}.nav-phone{font-size:13px;font-weight:800;border-left:1px solid var(--line);padding-left:24px}.menu-toggle{display:none;background:none;border:0;color:#fff;font-size:24px}
.hero{background:var(--bg);color:#fff;min-height:690px;overflow:hidden}.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;min-height:690px;align-items:center}.eyebrow{font-size:11px;letter-spacing:2px;font-weight:800;color:#9da6a3;margin-bottom:18px}.eyebrow i{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--accent);margin-right:8px;box-shadow:0 0 15px var(--accent)}
h1{font-size:clamp(48px,6vw,84px);line-height:.98;letter-spacing:-4px;margin:0 0 28px;font-weight:800}h1 em,h2 em{font-style:normal;color:var(--accent)}.hero-text{color:#adb6b3;max-width:590px;font-size:16px}.hero-actions{display:flex;gap:12px;margin:32px 0 18px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:20px;border-radius:12px;padding:15px 20px;font-weight:800;font-size:13px}.btn-primary{background:var(--accent);color:#101410}.btn-primary:hover{background:var(--accent2)}.btn-ghost{border:1px solid #394143;color:#fff}.hero-note{font-size:11px;color:#89928f}.hero-note span{color:var(--accent);margin-right:7px}
.hero-visual{height:100%;min-height:620px;position:relative;display:grid;place-items:center}.glow{position:absolute;width:440px;height:440px;background:radial-gradient(circle,rgba(184,232,62,.22),transparent 68%);filter:blur(10px)}.gas-orb{position:absolute;right:7%;top:18%;font-size:76px;font-weight:800;color:rgba(255,255,255,.035);letter-spacing:-6px}.cylinder-main{position:relative;z-index:2;width:235px;height:460px;transform:rotate(7deg);filter:drop-shadow(0 35px 45px rgba(0,0,0,.5))}.cylinder-main .body{position:absolute;left:0;right:0;bottom:0;height:390px;border-radius:70px 70px 38px 38px;background:linear-gradient(90deg,#303738,#c5ceca 18%,#697270 42%,#e1e5e2 65%,#444b4a);box-shadow:inset -18px 0 25px rgba(0,0,0,.25)}.neck{position:absolute;z-index:2;top:48px;left:52px;width:131px;height:80px;border-radius:20px 20px 10px 10px;background:linear-gradient(90deg,#3c4442,#bdc5c1,#59605e)}.valve{position:absolute;z-index:4;top:18px;left:91px;width:55px;height:55px;border-radius:12px 12px 20px 20px;background:#262d2c;border:6px solid #87918e}.label{position:absolute;z-index:5;left:32px;right:32px;top:185px;padding:20px 8px;background:#121717;color:#f5f6f3;text-align:center;border:1px solid #303735;letter-spacing:2px;font-size:26px;font-weight:800;box-shadow:0 10px 25px #1118}.label small{font-size:8px;color:var(--accent);letter-spacing:2px}.floating-card{position:absolute;z-index:8;background:rgba(28,33,33,.9);border:1px solid #39403f;border-radius:14px;padding:15px 17px;display:flex;gap:10px;align-items:center;backdrop-filter:blur(10px);box-shadow:0 15px 35px #0004}.floating-card b{font-size:21px;color:var(--accent)}.floating-card span{font-size:10px;line-height:1.35;color:#c5ccca}.card-top{top:20%;left:3%}.card-bottom{bottom:18%;right:1%}
.benefits{background:#fff;border-bottom:1px solid #e5e9e5}.benefits-grid{display:grid;grid-template-columns:repeat(4,1fr)}.benefits article{padding:28px 20px;display:flex;gap:13px;border-right:1px solid #e5e9e5}.benefits article:last-child{border:0}.benefit-icon{display:grid;place-items:center;min-width:37px;height:37px;border-radius:10px;background:#eef5df;color:#526e12;font-weight:800}.benefits b{font-size:13px}.benefits p{margin:4px 0 0;color:#7c8581;font-size:11px}
.section{padding:100px 0}.section-head{display:flex;justify-content:space-between;align-items:end;gap:40px;margin-bottom:40px}.section-head h2,.info h2,.faq h2,.cert h2{font-size:48px;line-height:1.05;letter-spacing:-2px;margin:0}.section-head>p{max-width:390px;color:#78817e;font-size:13px}
.products{display:grid;grid-template-columns:repeat(4,1fr);gap:15px}.product{position:relative;background:#fff;border:1px solid #e1e6e2;border-radius:18px;overflow:hidden;transition:.25s}.product:hover{transform:translateY(-5px);box-shadow:0 18px 40px #17201712}.product-badge{position:absolute;z-index:4;top:14px;left:14px;background:var(--accent);padding:6px 9px;border-radius:7px;font-size:9px;font-weight:900}.product-img{height:270px;background:linear-gradient(145deg,#f1f4f1,#e3e8e5);display:grid;place-items:center;overflow:hidden}.product-img img{width:100%;height:100%;object-fit:contain;position:relative;z-index:2}.mini-cylinder{width:90px;height:190px;border-radius:30px 30px 18px 18px;background:linear-gradient(90deg,#8d9692,#e5e9e7 35%,#9ca5a1 72%,#626966);position:relative;box-shadow:10px 18px 25px #0002}.mini-cylinder:before{content:"";position:absolute;top:-24px;left:20px;width:50px;height:40px;border-radius:10px;background:#68716e}.mini-cylinder i{position:absolute;top:76px;left:10px;right:10px;height:43px;background:#202626}.mini-cylinder.small{height:175px;width:82px}.mini-cylinder.tiny{height:155px;width:75px}.product-info{padding:20px}.product-type{font-size:9px;letter-spacing:1.3px;color:#88918e;font-weight:800}.product h3{font-size:21px;margin:7px 0 18px;letter-spacing:-.5px}.price-row{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-bottom:18px}.price-row div{background:#f2f4f2;padding:9px;border-radius:9px}.price-row small{display:block;color:#8b9390;font-size:9px}.price-row strong{font-size:15px}.product-btn{display:flex;justify-content:space-between;align-items:center;background:#121616;color:#fff;padding:12px 14px;border-radius:10px;font-size:12px;font-weight:800}.product-btn:hover{background:#29302e}
.accessories{margin-top:70px}.accessory-head{display:flex;align-items:end;gap:18px;margin-bottom:18px}.accessory-head span{font-size:10px;letter-spacing:1.7px;color:#8b9490;font-weight:800}.accessory-head h3{margin:0;font-size:28px;letter-spacing:-1px}.accessory-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px}.accessory{display:grid;grid-template-columns:130px 1fr auto;align-items:center;gap:18px;background:#fff;border:1px solid #e1e6e2;padding:12px;border-radius:16px}.accessory img{width:130px;height:105px;object-fit:contain;background:#f0f3f0;border-radius:10px}.accessory h4{margin:0 0 8px;font-size:14px}.accessory strong{font-size:20px}.accessory a{font-size:11px;font-weight:800}
.section-dark{background:var(--bg);color:#fff;padding:100px 0}.delivery-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:90px}.delivery h2{font-size:58px;line-height:1.02;letter-spacing:-3px;margin:0 0 25px}.delivery> .container>div>p{color:#9da7a4;max-width:450px;margin-bottom:30px}.delivery-list{display:grid;grid-template-columns:1fr 1fr;gap:0 30px}.delivery-list>div{padding:25px 0;border-top:1px solid #2b3030}.delivery-list span{color:var(--accent);font-size:10px;letter-spacing:1px}.delivery-list b{display:block;margin:8px 0;font-size:15px}.delivery-list p{color:#89918f;font-size:12px;margin:0}
.centered{display:block;text-align:center}.centered>p{margin:12px auto 0}.steps-grid{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid #dde2de}.step{padding:30px 24px;border-right:1px solid #dde2de;position:relative}.step:last-child{border:0}.step>span{position:absolute;right:20px;top:25px;color:#9da6a2;font-size:10px}.step-icon{width:45px;height:45px;display:grid;place-items:center;border-radius:13px;background:#121616;color:var(--accent);margin-bottom:25px}.step h3{font-size:16px;margin:0 0 8px}.step p{font-size:12px;color:#808a86;margin:0}
.info{background:#ecefea}.info-grid{display:grid;grid-template-columns:1fr 1fr;gap:100px}.info-grid p{font-size:15px;color:#68716e;margin:0 0 20px}
.faq{background:#fff}.faq-grid{display:grid;grid-template-columns:.75fr 1.25fr;gap:100px}.muted{font-size:12px;color:#89918e;max-width:360px;margin-top:22px}.accordion details{border-top:1px solid #dfe4e1;padding:22px 0}.accordion details:last-child{border-bottom:1px solid #dfe4e1}.accordion summary{cursor:pointer;list-style:none;font-weight:700;font-size:15px;display:flex;justify-content:space-between;gap:20px}.accordion summary::-webkit-details-marker{display:none}.accordion summary b{font-size:20px;font-weight:400}.accordion details[open] summary b{transform:rotate(45deg)}.accordion p{font-size:12px;color:#78817e;max-width:650px;margin:12px 0 0}
.cert{background:#dfe8d7}.cert-inner{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:80px}.cert p{color:#69736d;max-width:430px;font-size:13px}.document-placeholder{min-height:220px;border:1px dashed #9baa96;border-radius:20px;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:8px;background:#e9f0e3}.document-placeholder span{font-size:11px;background:#111;color:#fff;border-radius:6px;padding:5px 7px}.document-placeholder small{color:#7b867d}
.article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}.article-grid article{background:#fff;border:1px solid #e1e6e2;padding:28px;border-radius:17px}.article-grid span{font-size:9px;letter-spacing:1.5px;color:#89928e;font-weight:800}.article-grid h3{font-size:20px;line-height:1.2;margin:35px 0 12px}.article-grid p{font-size:12px;color:#7d8682;min-height:38px}.article-grid a{font-size:11px;font-weight:800}
.seo-text{background:#fff;border-top:1px solid #e2e7e3}.narrow{max-width:900px}.seo-text h2{font-size:34px;letter-spacing:-1.5px;margin:0 0 25px}.seo-text p{font-size:13px;color:#68716e;line-height:1.8}.seo-text h3{font-size:20px;letter-spacing:-.5px;margin:30px 0 12px}.seo-text ul{font-size:13px;color:#68716e;line-height:1.8;padding-left:20px}
.breadcrumbs{font-size:12px;color:#88918e;margin-bottom:18px}.breadcrumbs a{color:#88918e}.breadcrumbs a:hover{color:var(--accent)}.breadcrumbs span{color:#4d5553}
.product-detail{padding:60px 0}.product-detail-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:60px;align-items:center}.product-detail-img{background:linear-gradient(145deg,#eef1ee,#e0e6e2);border-radius:22px;aspect-ratio:1/1;display:grid;place-items:center;padding:20px}.product-detail-img img{max-width:100%;max-height:100%;object-fit:contain}
.pd-prices{display:grid;grid-template-columns:1fr 1fr;gap:12px;max-width:420px;margin:24px 0}
.pd-prices>div{background:#191e1f;padding:14px;border-radius:10px;color:#fff}
.pd-prices small{color:#88918e;font-size:10px;display:block;margin-bottom:3px}
.pd-prices strong{font-size:18px}
.pd-prices .highlight strong{color:var(--accent)}
.article-meta{font-size:11px;color:#89918e;letter-spacing:1.5px;font-weight:800;margin-bottom:12px;text-transform:uppercase}
.article-hero{background:var(--bg);color:#fff;padding:70px 0 60px}
.article-hero h1{font-size:clamp(30px,3.6vw,52px);letter-spacing:-1.8px;line-height:1.08;max-width:900px}
.article-body{padding:60px 0}
.article-body h2{font-size:26px;letter-spacing:-.8px;margin:36px 0 12px}
.article-body h3{font-size:19px;margin:26px 0 10px}
.article-body p{font-size:14px;color:#424a48;line-height:1.8;margin:0 0 16px}
.article-body ul{font-size:14px;color:#424a48;line-height:1.8;padding-left:20px;margin:0 0 18px}
.article-body li{margin:6px 0}
.cta-block{background:#0d1011;color:#fff;padding:35px;border-radius:18px;margin-top:40px;display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap}
.cta-block h3{margin:0;font-size:22px}
.cta-block p{margin:6px 0 0;color:#9da7a4;font-size:13px}
.table-prices{width:100%;border-collapse:collapse;font-size:14px;margin:20px 0}
.table-prices th,.table-prices td{padding:14px 12px;text-align:left;border-bottom:1px solid #e1e6e2}
.table-prices th{background:#eef1ee;font-weight:800;font-size:12px;text-transform:uppercase;letter-spacing:1px;color:#4d5553}
.table-prices a{color:#526e12;font-weight:800;font-size:12px}
.footer{background:#0b0e0f;color:#fff;padding:65px 0 25px}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:60px}.footer p,.footer span,.footer a:not(.logo){display:block;color:#7f8986;font-size:12px;margin-top:10px}.footer b{font-size:11px;letter-spacing:1px;text-transform:uppercase}.footer-phone{font-size:20px!important;color:#fff!important;font-weight:800}.footer-bottom{border-top:1px solid #252a29;margin-top:55px;padding-top:18px;display:flex;justify-content:space-between;color:#606967;font-size:10px}.mobile-call{display:none}
@media(max-width:1050px){.menu{gap:13px}.nav-phone{display:none}.products{grid-template-columns:repeat(2,1fr)}.hero-grid{grid-template-columns:1fr .75fr}.hero-visual{transform:scale(.85)}}
@media(max-width:760px){
  .container{width:min(calc(100% - 28px),var(--max))}.topline{font-size:10px}.header{position:sticky}.nav{min-height:64px}.menu-toggle{display:block;margin-left:auto}.menu{display:none;position:absolute;top:64px;left:0;right:0;background:#101415;padding:16px 20px;flex-direction:column;border-bottom:1px solid #303635}.menu.open{display:flex}.menu a{padding:8px 0}.hero{min-height:auto}.hero-grid{display:block;min-height:auto;padding-top:65px}.hero-copy{padding-bottom:20px}h1{font-size:49px;letter-spacing:-2.8px}.hero-text{font-size:14px}.hero-actions{flex-direction:column}.btn{width:100%}.hero-visual{min-height:390px;height:390px;transform:none}.cylinder-main{transform:scale(.72) rotate(7deg)}.card-top{top:4%;left:0}.card-bottom{bottom:3%;right:0}.gas-orb{right:0}.benefits-grid{grid-template-columns:1fr 1fr}.benefits article{padding:18px 10px;border-bottom:1px solid #e5e9e5}.benefits p{font-size:10px}.section,.section-dark{padding:70px 0}.section-head{display:block;margin-bottom:28px}.section-head h2,.info h2,.faq h2,.cert h2{font-size:38px}.section-head>p{margin-top:15px}.products{grid-template-columns:1fr 1fr;gap:10px}.product-img{height:190px}.product-info{padding:14px}.product h3{font-size:17px;margin:6px 0 12px}.price-row{display:block}.price-row div{margin-bottom:5px}.price-row strong{font-size:13px}.product-btn{font-size:11px}.accessory-grid{grid-template-columns:1fr}.accessory{grid-template-columns:90px 1fr;gap:12px}.accessory img{width:90px;height:90px}.accessory a{grid-column:2}.delivery-grid,.info-grid,.faq-grid,.cert-inner{grid-template-columns:1fr;gap:45px}.delivery h2{font-size:45px}.delivery-list{grid-template-columns:1fr}.steps-grid{grid-template-columns:1fr 1fr}.step:nth-child(2){border-right:0}.step{border-bottom:1px solid #dde2de}.article-grid{grid-template-columns:1fr}.article-grid h3{margin-top:25px}.seo-text h2{font-size:29px}.footer-grid{grid-template-columns:1fr 1fr;gap:35px}.footer-grid>div:first-child{grid-column:1/-1}.footer-bottom{display:block}.footer-bottom span{margin:7px 0}.mobile-call{display:block;position:fixed;z-index:100;bottom:12px;left:12px;right:12px;background:var(--accent);color:#111;text-align:center;padding:14px;border-radius:12px;font-weight:900;font-size:12px;box-shadow:0 8px 30px #0004}
  .article-hero{padding:45px 0 40px}.article-body{padding:40px 0}.cta-block{padding:25px}.table-prices{font-size:12px}.table-prices th,.table-prices td{padding:10px 8px}
}
@media(max-width:420px){.products{grid-template-columns:1fr}.product-img{height:240px}.steps-grid{grid-template-columns:1fr}.benefits-grid{grid-template-columns:1fr}.benefits article{border-right:0}.accessory{grid-template-columns:80px 1fr}.accessory img{width:80px;height:80px}}