*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{--gold:#E8A020;--gold-dark:#C07010;--dark:#1A1A1A;--dark2:#2D2D2D;--gray:#F5F5F5;--gray2:#E8E8E8;--text:#333;--text-light:#666;--white:#fff}
body{font-family:'Segoe UI',Tahoma,sans-serif;color:var(--text);background:#fff;line-height:1.6}
a{color:inherit;text-decoration:none}
header{background:var(--dark);position:sticky;top:0;z-index:1000;box-shadow:0 2px 10px rgba(0,0,0,.4)}
.header-inner{max-width:1200px;margin:0 auto;padding:0 20px;display:flex;align-items:center;justify-content:space-between;height:90px}
.logo img{height:80px;width:auto;display:block}
nav{display:flex;gap:20px}
nav a{color:#ccc;font-size:14px;font-weight:500;transition:color .2s}
nav a:hover,nav a.active{color:var(--gold)}
.header-right{display:flex;align-items:center;gap:12px}
.header-phone{color:#fff;font-size:15px;font-weight:700;transition:color .2s}
.header-phone:hover{color:var(--gold)}
.burger{display:none;flex-direction:column;gap:5px;cursor:pointer;background:none;border:none;padding:4px}
.burger span{display:block;width:24px;height:2px;background:#fff;border-radius:2px}
.mobile-menu{display:none;background:var(--dark2);border-top:1px solid #333}
.mobile-menu a{display:block;color:#ccc;padding:10px 20px;font-size:14px;border-bottom:1px solid #333;transition:color .2s}
.mobile-menu a:hover{color:var(--gold)}
.mobile-menu.open{display:block}
.btn-primary{background:var(--gold);color:var(--dark);border:none;padding:10px 20px;border-radius:4px;font-size:13px;font-weight:700;cursor:pointer;display:inline-block;transition:background .2s}
.btn-primary:hover{background:var(--gold-dark)}
.btn-outline{background:transparent;color:#fff;border:1.5px solid var(--gold);padding:9px 20px;border-radius:4px;font-size:13px;font-weight:600;cursor:pointer;display:inline-block;transition:all .2s}
.btn-outline:hover{background:var(--gold);color:var(--dark)}
.breadcrumb{background:var(--gray);padding:10px 20px;font-size:13px;border-bottom:1px solid var(--gray2)}
.breadcrumb-inner{max-width:1200px;margin:0 auto;display:flex;flex-wrap:wrap;gap:4px;align-items:center;color:var(--text-light)}
.breadcrumb a{color:var(--gold-dark)}
.sep{color:#bbb}
.hero{padding:80px 20px;position:relative;overflow:hidden;background-size:cover;background-position:center;color:#fff}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(135deg,rgba(26,26,26,.97),rgba(45,45,45,.88),rgba(58,42,16,.82))}
.hero-inner{max-width:1200px;margin:0 auto;position:relative;z-index:1}
.hero-badge{display:inline-block;background:var(--gold);color:var(--dark);padding:4px 12px;border-radius:3px;font-size:12px;font-weight:700;letter-spacing:1px;text-transform:uppercase;margin-bottom:20px}
.hero h1{font-size:40px;font-weight:800;line-height:1.2;max-width:650px;margin-bottom:18px}
.hero h1 span{color:var(--gold)}
.hero-sub{font-size:16px;color:#bbb;max-width:520px;margin-bottom:34px;line-height:1.7}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:40px}
.stats-row{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}
.stat-box{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.12);border-radius:8px;padding:18px 12px;text-align:center}
.stat-box .n{font-size:28px;font-weight:900;color:var(--gold);display:block;line-height:1}
.stat-box .l{font-size:11px;color:#bbb;margin-top:5px;display:block;line-height:1.4}
.section{padding:70px 20px}
.section-gray{background:var(--gray)}
.container{max-width:1200px;margin:0 auto}
.section-line{width:50px;height:3px;background:var(--gold);margin-bottom:14px}
.section-title{font-size:28px;font-weight:800;color:var(--dark);margin-bottom:8px}
.section-sub{font-size:15px;color:var(--text-light);margin-bottom:36px}
.grid3,.catalog-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.grid4,.adv-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.cat-card{background:#fff;border:1px solid var(--gray2);border-radius:8px;overflow:hidden;display:block;transition:transform .2s,box-shadow .2s,border-color .2s}
.cat-card:hover{transform:translateY(-3px);box-shadow:0 8px 24px rgba(0,0,0,.1);border-color:var(--gold)}
.cat-card img{width:100%;height:200px;object-fit:cover;display:block}
.cat-card-body{padding:18px}
.cat-card-title{font-size:16px;font-weight:700;color:var(--dark);margin-bottom:6px}
.cat-card-meta{font-size:13px;color:var(--text-light);margin-bottom:10px}
.cat-card-link{font-size:13px;color:var(--gold-dark);font-weight:600}
.cat-card-link::after{content:" →"}
.why-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.why-item{background:#fff;border-left:3px solid var(--gold);padding:18px 16px;border-radius:0 6px 6px 0}
.why-num{font-size:11px;font-weight:700;color:var(--gold);text-transform:uppercase;letter-spacing:1px;margin-bottom:6px}
.why-title{font-size:14px;font-weight:700;color:var(--dark)}
.cert-row{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:24px}
.cert-img{border-radius:6px;overflow:hidden;border:1px solid var(--gray2);cursor:zoom-in;transition:box-shadow .2s,transform .2s}
.cert-img:hover{box-shadow:0 6px 20px rgba(0,0,0,.18);transform:translateY(-2px)}
.cert-img img{width:100%;height:200px;object-fit:cover;display:block}
.lb-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.88);z-index:99999;align-items:center;justify-content:center;cursor:zoom-out}
.lb-overlay.open{display:flex}
.lb-overlay img{max-width:90vw;max-height:90vh;border-radius:8px;object-fit:contain}
.lb-close{position:fixed;top:20px;right:24px;color:#fff;font-size:36px;cursor:pointer;opacity:.8}
.lb-close:hover{opacity:1}
.factory-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:24px}
.factory-grid img{width:100%;height:200px;object-fit:cover;border-radius:6px;display:block}
.form-section{background:var(--dark);padding:70px 20px}
.form-wrap{max-width:680px;margin:0 auto;text-align:center}
.form-title{font-size:28px;font-weight:800;color:#fff;margin-bottom:8px}
.form-sub{color:#aaa;font-size:15px;margin-bottom:30px}
.form-row{display:flex;gap:12px;margin-bottom:12px}
.form-input{flex:1;padding:14px 16px;border:1.5px solid #444;border-radius:4px;background:var(--dark2);color:#fff;font-size:14px;font-family:inherit;outline:none;transition:border-color .2s;width:100%}
.form-input:focus{border-color:var(--gold)}
.form-input::placeholder{color:#888}
.form-note{font-size:12px;color:#666;margin-top:10px}
.success-msg{display:none;background:#1a4a1a;border:1px solid #2d7a2d;color:#7ddd7d;padding:14px;border-radius:4px;font-size:14px;margin-top:12px}
.calculator-wrap{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(300px,.95fr);gap:28px;align-items:stretch;margin-top:26px}
.calculator-card,.calculator-result{border:1px solid var(--gray2);border-radius:12px;padding:28px;background:#fff;box-shadow:0 8px 30px rgba(0,0,0,.06)}
.calculator-fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.calc-field label{display:block;font-size:13px;font-weight:700;color:var(--dark);margin-bottom:7px}
.calc-input-wrap{display:flex;align-items:center;border:1.5px solid #d7d7d7;border-radius:6px;overflow:hidden;background:#fff;transition:border-color .2s,box-shadow .2s}
.calc-input-wrap:focus-within{border-color:var(--gold);box-shadow:0 0 0 3px rgba(232,160,32,.14)}
.calc-input{border:0;outline:0;width:100%;padding:13px 12px;font:inherit;font-weight:700;color:var(--dark);min-width:0}
.calc-unit{padding:0 12px;color:var(--text-light);font-size:13px;border-left:1px solid #e6e6e6;white-space:nowrap}
.calc-presets{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.calc-preset{border:1px solid #ddd;background:#fff;color:var(--text);padding:8px 12px;border-radius:20px;font:inherit;font-size:12px;font-weight:700;cursor:pointer}
.calc-preset:hover,.calc-preset.active{border-color:var(--gold);background:#fff7e8;color:var(--gold-dark)}
.calculator-result{background:var(--dark);color:#fff;border-color:var(--dark);display:flex;flex-direction:column;justify-content:center}
.result-kicker{color:var(--gold);font-size:12px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;margin-bottom:12px}
.result-main{font-size:44px;font-weight:900;line-height:1.05;margin-bottom:22px}
.result-main small{font-size:18px;color:#bbb;font-weight:600}
.result-list{border-top:1px solid #444}
.result-row{display:flex;justify-content:space-between;gap:20px;padding:12px 0;border-bottom:1px solid #444;font-size:14px}
.result-row span{color:#aaa}.result-row strong{text-align:right;color:#fff}
.calc-note{font-size:12px;color:#aaa;line-height:1.6;margin-top:16px}
.formula-box{background:#fff7e8;border-left:4px solid var(--gold);padding:18px 20px;border-radius:0 8px 8px 0;margin:24px 0;font-size:16px}
@media(max-width:760px){.calculator-wrap{grid-template-columns:1fr}.calculator-fields{grid-template-columns:1fr}.calculator-card,.calculator-result{padding:20px}.result-main{font-size:36px}}
.page-layout{display:grid;grid-template-columns:220px 1fr;gap:32px;align-items:start}
.sidebar{position:sticky;top:100px}
.sidebar-nav{background:var(--gray);border-radius:6px;padding:18px;margin-bottom:16px}
.sidebar-nav h3{font-size:12px;font-weight:700;color:var(--dark);text-transform:uppercase;letter-spacing:.5px;margin-bottom:12px}
.sidebar-nav a{display:block;color:var(--text);font-size:14px;padding:7px 10px;border-radius:4px;margin-bottom:2px;transition:all .2s}
.sidebar-nav a:hover{background:var(--gold);color:var(--dark)}
.sidebar-nav a.current{background:var(--dark);color:#fff;font-weight:600}
.sidebar-contact{background:var(--dark);border-radius:6px;padding:18px;color:#fff}
.sidebar-contact p{font-size:12px;color:#888;margin-bottom:8px}
.sidebar-contact .s-phone{color:var(--gold);font-size:16px;font-weight:700;display:block;margin-bottom:10px}
.sidebar-contact .s-tg{color:#888;font-size:13px}
.price-table{width:100%;border-collapse:collapse;font-size:14px;margin-top:8px}
.price-table th{background:var(--dark);color:#fff;padding:11px 14px;text-align:left;font-size:13px;font-weight:600}
.price-table td{padding:10px 14px;border-bottom:1px solid var(--gray2)}
.price-table tr:nth-child(even) td{background:var(--gray)}
.price-table tr:hover td{background:#FFF8EC}
.subcat td{background:#F0E8D0!important;font-weight:700;font-size:12px;text-transform:uppercase;color:var(--dark)}
.price-col{font-weight:700;color:var(--dark);white-space:nowrap}
.unit-col{color:var(--text-light)}
.modal-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.75);z-index:9999;align-items:center;justify-content:center}
.modal-overlay.active{display:flex}
.modal{background:var(--dark2);border-radius:8px;padding:36px;width:90%;max-width:460px;position:relative;color:#fff}
.modal h3{font-size:22px;font-weight:800;margin-bottom:6px}
.modal p{color:#aaa;font-size:14px;margin-bottom:22px}
.modal-close{position:absolute;top:14px;right:18px;background:none;border:none;color:#777;font-size:26px;cursor:pointer;line-height:1}
.modal-close:hover{color:#fff}
.faq-item{border-left:3px solid var(--gold);padding-left:20px;margin-bottom:24px}
.faq-q{font-size:16px;font-weight:700;color:var(--dark);margin-bottom:6px}
.faq-a{font-size:14px;color:var(--text-light);line-height:1.7}
footer{background:#111;color:#aaa;padding:50px 20px 24px}
.footer-grid{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
.footer-brand img{height:48px;display:block;margin-bottom:14px}
.footer-brand p{font-size:13px;color:#777;line-height:1.7;max-width:260px}
.footer-col h4{color:#fff;font-size:14px;font-weight:700;margin-bottom:14px}
.footer-col a,.footer-col p{display:block;color:#777;font-size:13px;margin-bottom:8px;line-height:1.5;transition:color .2s}
.footer-col a:hover{color:var(--gold)}
.footer-bottom{max-width:1200px;margin:0 auto;border-top:1px solid #222;padding-top:20px;display:flex;justify-content:space-between;font-size:12px;color:#444;flex-wrap:wrap;gap:8px}
@media(max-width:1000px){.footer-grid{grid-template-columns:1fr 1fr}.grid4,.adv-grid,.why-grid{grid-template-columns:repeat(2,1fr)}.stats-row{grid-template-columns:repeat(3,1fr)}.cert-row{grid-template-columns:repeat(2,1fr)}}
@media(max-width:900px){.grid3,.catalog-grid{grid-template-columns:repeat(2,1fr)}.page-layout{grid-template-columns:1fr}.sidebar{position:static}.hero h1{font-size:28px}nav{display:none}.burger{display:flex}.factory-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.grid3,.catalog-grid,.grid4,.adv-grid,.why-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr}.form-row{flex-direction:column}.hero{padding:50px 20px}.hero h1{font-size:22px}.section{padding:50px 20px}.stats-row{grid-template-columns:repeat(2,1fr)}.cert-row,.factory-grid{grid-template-columns:1fr}}