/* Экстрагент — дизайн-система сайта. Палитра и шрифт по брендбуку. */
:root{
  --gold:#D4A441; --gold-deep:#A87A24; --gold-soft:#F6ECD6;
  --blue:#0F5DAA; --blue-deep:#0B3A6E; --blue-soft:#E4EEF8;
  --ink:#1F2937; --ink-2:#4B5563; --ink-3:#6B7280;
  --clean:#E9EDF3; --paper:#F6F8FB; --white:#fff; --line:#DCE2EA;
  --ok:#1C7C54; --err:#B42318;
  --r-s:6px; --r-m:12px; --r-l:20px;
  --wrap:1200px; --gut:clamp(16px,4vw,32px);
  --f:'Manrope',system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif;
  --shadow:0 1px 2px rgba(31,41,55,.06),0 8px 24px -12px rgba(15,93,170,.18);
  color-scheme:light;
}
*,*::before,*::after{box-sizing:border-box}
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:88px}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}
body{margin:0;font-family:var(--f);font-size:17px;line-height:1.6;color:var(--ink);background:var(--white);font-feature-settings:"tnum" 0}
img,svg{max-width:100%;height:auto;display:block}
a{color:var(--blue);text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{color:var(--blue-deep)}
:focus-visible{outline:3px solid var(--gold);outline-offset:2px;border-radius:4px}
h1,h2,h3,h4,h5{line-height:1.18;margin:0 0 .5em;font-weight:700;letter-spacing:-.015em;color:var(--ink)}
h1{font-size:clamp(32px,4.6vw,54px);letter-spacing:-.025em}
h2{font-size:clamp(26px,3vw,36px)}
h3{font-size:clamp(20px,2vw,24px)}
h4{font-size:19px}
p{margin:0 0 1em}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 var(--gut)}
.skip{position:absolute;left:-999px;top:8px;background:var(--ink);color:#fff;padding:10px 16px;border-radius:var(--r-s);z-index:100}
.skip:focus{left:8px}
.num{font-variant-numeric:tabular-nums}
.muted{color:var(--ink-3)}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* ---------- header ---------- */
.hdr{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--line)}
.hdr .wrap{display:flex;align-items:center;gap:20px;height:72px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-weight:700;font-size:21px;letter-spacing:-.02em;flex:none}
.brand img{width:30px;height:34px}
.brand small{display:block;font-size:10.5px;font-weight:500;color:var(--ink-3);letter-spacing:0;line-height:1.1;margin-top:1px}
.nav{display:flex;gap:2px;margin-left:12px;flex:1;min-width:0;overflow:hidden}
.nav a{padding:8px 10px;border-radius:var(--r-s);color:var(--ink-2);text-decoration:none;font-size:15px;font-weight:500;white-space:nowrap}
.nav a:hover{background:var(--paper);color:var(--ink)}
.nav a[aria-current="page"]{color:var(--ink);box-shadow:inset 0 -2px 0 var(--gold);border-radius:0}
.hdr-actions{display:flex;align-items:center;gap:8px;margin-left:auto}
.icon-btn{width:42px;height:42px;display:inline-grid;place-items:center;border:1px solid var(--line);border-radius:var(--r-s);background:#fff;color:var(--ink);cursor:pointer}
.icon-btn:hover{border-color:var(--ink-3)}
.menu-btn{display:none}
@media (max-width:1480px){.brand small{display:none}}
@media (max-width:1440px){.nav a{font-size:14.5px;padding:8px 7px}.nav{margin-left:4px}}
@media (max-width:1180px){.nav{display:none}.menu-btn{display:inline-grid}}
@media (max-width:560px){.hdr .btn-cta{display:none}}
.drawer{position:fixed;inset:72px 0 0 0;background:#fff;z-index:49;padding:20px var(--gut) 40px;overflow:auto;display:none}
.drawer.open{display:block}
.drawer a{display:block;padding:14px 0;border-bottom:1px solid var(--line);color:var(--ink);text-decoration:none;font-size:19px;font-weight:600}
.drawer .btn{margin-top:24px;width:100%}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:0 22px;border-radius:var(--r-s);font:600 16px/1 var(--f);text-decoration:none;cursor:pointer;border:1px solid transparent;transition:background .15s,border-color .15s,color .15s}
.btn-gold{background:var(--gold);color:#241a06}
.btn-gold:hover{background:#C8952F;color:#241a06}
.btn-blue{background:var(--blue);color:#fff}
.btn-blue:hover{background:var(--blue-deep);color:#fff}
.btn-line{background:#fff;border-color:var(--line);color:var(--ink)}
.btn-line:hover{border-color:var(--ink);color:var(--ink)}
.btn-sm{min-height:40px;padding:0 16px;font-size:15px}
.btn svg{width:18px;height:18px}

/* ---------- breadcrumbs ---------- */
.crumbs{font-size:14px;color:var(--ink-3);padding:22px 0 0}
.crumbs ol{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:6px}
.crumbs li+li::before{content:"/";margin-right:6px;color:var(--line)}
.crumbs a{color:var(--ink-3);text-decoration:none}
.crumbs a:hover{color:var(--blue)}

/* ---------- sections ---------- */
.sec{padding:clamp(56px,8vw,104px) 0}
.sec-tight{padding:clamp(40px,5vw,64px) 0}
.sec-paper{background:var(--paper)}
.sec-ink{background:var(--ink);color:#E5E9F0}
.sec-ink h2,.sec-ink h3{color:#fff}
.sec-head{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:36px;flex-wrap:wrap}
.sec-head p{max-width:60ch;color:var(--ink-2);margin:0}
.lead{font-size:clamp(18px,1.6vw,20px);color:var(--ink-2);max-width:60ch}
.gold-rule{width:48px;height:3px;background:var(--gold);margin:0 0 22px;border:0}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;background:linear-gradient(180deg,#fff 0%,var(--paper) 100%)}
.hero .wrap{display:grid;grid-template-columns:1.2fr .8fr;gap:40px;align-items:center;min-height:600px;padding-top:40px;padding-bottom:40px}
.hero h1{margin-bottom:18px}
.hero .lead{margin-bottom:30px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}
.hero-visual{position:relative;justify-self:center;width:min(100%,460px)}
.hero-visual picture img{width:100%;mix-blend-mode:multiply}
.hero-formula{margin:34px 0 0;padding-top:22px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;align-items:baseline;gap:6px 18px}
.hero-formula b{font-size:clamp(20px,2.2vw,26px);font-weight:600;letter-spacing:-.01em;font-variant-numeric:tabular-nums}
.hero-formula a{font-size:15px;font-weight:600}
.lattice{position:absolute;pointer-events:none;opacity:.55}
@media (max-width:900px){.hero .wrap{grid-template-columns:1fr;min-height:0}.hero-visual{width:min(70%,300px);order:-1}}

/* ---------- facts strip ---------- */
.facts{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line);border-radius:var(--r-m);background:#fff;overflow:hidden}
.fact{padding:22px 24px;display:flex;gap:14px;align-items:flex-start}
.fact+.fact{border-left:1px solid var(--line)}
.fact svg{flex:none;width:30px;height:30px;color:var(--gold-deep)}
.fact b{display:block;font-size:22px;letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.fact span{font-size:14px;color:var(--ink-3);line-height:1.35;display:block}
@media (max-width:900px){.facts{grid-template-columns:1fr 1fr}.fact:nth-child(3){border-left:0}.fact:nth-child(n+3){border-top:1px solid var(--line)}}
@media (max-width:480px){.facts{grid-template-columns:1fr}.fact+.fact{border-left:0;border-top:1px solid var(--line)}}

/* ---------- element tiles (periodic table) ---------- */
.elements{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.el{position:relative;aspect-ratio:1/1.08;border-radius:var(--r-m);padding:14px 16px;background:#fff;border:1px solid var(--line);display:flex;flex-direction:column;text-decoration:none;color:var(--ink)}
.el:hover{border-color:var(--gold)}
.el .z{font-size:14px;color:var(--ink-3);font-variant-numeric:tabular-nums}
.el .sym{font-size:clamp(40px,5vw,64px);font-weight:700;letter-spacing:-.04em;line-height:1;margin:auto 0 6px}
.el .nm{font-size:15px;font-weight:600}
.el .ms{font-size:13px;color:var(--ink-3)}
.el.au{background:linear-gradient(160deg,#FBF3E1,#F1DCA8);border-color:#E9CD8D}
.el.au .sym{color:var(--gold-deep)}
.el-note{position:absolute;top:12px;right:12px;font-size:12px;background:var(--ink);color:#fff;border-radius:99px;padding:3px 9px}
@media (max-width:900px){.elements{grid-template-columns:repeat(3,1fr)}}
@media (max-width:520px){.elements{grid-template-columns:repeat(2,1fr)}}

/* ---------- features ---------- */
.feats{display:grid;grid-template-columns:repeat(4,1fr);gap:32px}
.feat h3{font-size:19px;margin:14px 0 8px}
.feat p{font-size:15.5px;color:var(--ink-2);margin:0}
.feat .ic{width:48px;height:48px;border-radius:50%;display:grid;place-items:center;background:var(--gold-soft);color:var(--gold-deep)}
.feat .ic svg{width:24px;height:24px}
@media (max-width:900px){.feats{grid-template-columns:1fr 1fr}}
@media (max-width:520px){.feats{grid-template-columns:1fr}}

/* ---------- split ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(28px,5vw,72px);align-items:center}
.split.rev>:first-child{order:2}
@media (max-width:900px){.split{grid-template-columns:1fr}.split.rev>:first-child{order:0}}
.photo{border-radius:var(--r-l);overflow:hidden;background:var(--clean)}
.photo img{width:100%;height:100%;object-fit:cover}

/* ---------- tables ---------- */
.tbl-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r-m);background:#fff;margin:0 0 1.4em}
table{border-collapse:collapse;width:100%;font-size:15.5px}
th,td{text-align:left;padding:12px 16px;border-bottom:1px solid var(--line);vertical-align:top}
tr:last-child>td{border-bottom:0}
thead th{background:var(--paper);font-weight:600;color:var(--ink);font-size:14.5px}
td{font-variant-numeric:tabular-nums}
.spec td:first-child{color:var(--ink-2);width:52%}
.spec td:last-child{font-weight:600}

/* ---------- cards ---------- */
.grid{display:grid;gap:20px}
.g2{grid-template-columns:repeat(2,1fr)}.g3{grid-template-columns:repeat(3,1fr)}.g4{grid-template-columns:repeat(4,1fr)}
@media (max-width:1000px){.g3,.g4{grid-template-columns:1fr 1fr}}
@media (max-width:640px){.g2,.g3,.g4{grid-template-columns:1fr}}
.card{position:relative;display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--r-m);padding:22px 22px 20px;color:var(--ink);text-decoration:none;transition:border-color .15s}
.card:hover{border-color:var(--blue);color:var(--ink)}
.card h3{font-size:18px;line-height:1.3;margin:10px 0 8px;letter-spacing:-.01em}
.card p{font-size:15px;color:var(--ink-2);margin:0 0 14px}
.card .meta{display:flex;flex-wrap:wrap;gap:6px;align-items:center;font-size:13px;color:var(--ink-3)}
.card .more{margin-top:auto;font-size:14.5px;font-weight:600;color:var(--blue)}
.card-media{margin:-22px -22px 16px;aspect-ratio:16/9;border-radius:var(--r-m) var(--r-m) 0 0;overflow:hidden;background:var(--clean)}
.card-media img,.card-media svg{width:100%;height:100%;object-fit:cover}
.tag{display:inline-flex;align-items:center;height:24px;padding:0 9px;border-radius:99px;background:var(--paper);border:1px solid var(--line);font-size:12.5px;font-weight:600;color:var(--ink-2)}
.tag-au{background:var(--gold-soft);border-color:#EBD5A2;color:#7A5514}
.tag-blue{background:var(--blue-soft);border-color:#C9DCF0;color:var(--blue-deep)}

/* ---------- catalog / search ---------- */
.toolbar{display:grid;gap:14px;margin-bottom:28px}
.search{position:relative}
.search input{width:100%;height:54px;border:1px solid var(--line);border-radius:var(--r-m);padding:0 18px 0 50px;font:500 17px var(--f);color:var(--ink);background:#fff}
.search input:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px var(--blue-soft)}
.search svg{position:absolute;left:17px;top:50%;transform:translateY(-50%);width:20px;height:20px;color:var(--ink-3)}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{height:38px;padding:0 15px;border-radius:99px;border:1px solid var(--line);background:#fff;font:600 14.5px var(--f);color:var(--ink-2);cursor:pointer}
.chip:hover{border-color:var(--ink-3)}
.chip[aria-pressed="true"]{background:var(--ink);border-color:var(--ink);color:#fff}
.chip .n{opacity:.6;margin-left:4px;font-variant-numeric:tabular-nums}
.result-count{font-size:14px;color:var(--ink-3)}
.empty{padding:40px;text-align:center;border:1px dashed var(--line);border-radius:var(--r-m);color:var(--ink-2)}
mark{background:#FBEBC4;color:inherit;border-radius:2px;padding:0 1px}

/* ---------- search dialog ---------- */
dialog.sd{border:0;padding:0;width:min(720px,94vw);border-radius:var(--r-l);box-shadow:0 30px 80px rgba(15,23,42,.35);margin-top:10vh}
dialog.sd::backdrop{background:rgba(31,41,55,.45)}
.sd-in{padding:18px}
.sd-list{max-height:60vh;overflow:auto;margin:12px 0 0;padding:0;list-style:none}
.sd-list a{display:block;padding:12px 14px;border-radius:var(--r-s);text-decoration:none;color:var(--ink)}
.sd-list a:hover,.sd-list a:focus{background:var(--paper);outline:none}
.sd-list b{display:block;font-size:16px;font-weight:600}
.sd-list span{font-size:13.5px;color:var(--ink-3)}

/* ---------- article / prose ---------- */
.page-head{padding:18px 0 40px;border-bottom:1px solid var(--line);margin-bottom:44px}
.page-head h1{max-width:22ch;margin-top:14px}
.page-head.wide h1{max-width:none}
.page-head .lead{margin:0}
.post-meta{display:flex;flex-wrap:wrap;gap:10px;align-items:center;font-size:14px;color:var(--ink-3)}
.layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:56px;align-items:start}
@media (max-width:1000px){.layout{grid-template-columns:1fr}}
.aside{position:sticky;top:96px;display:grid;gap:16px}
.box{border:1px solid var(--line);border-radius:var(--r-m);padding:20px;background:#fff}
.box h4{font-size:16px;margin-bottom:10px}
.box p{font-size:15px;color:var(--ink-2)}
.box-gold{background:var(--gold-soft);border-color:#EBD5A2}
.toc{list-style:none;margin:0;padding:0;font-size:14.5px}
.toc li{margin:0}
.toc a{display:block;padding:5px 0 5px 12px;border-left:2px solid var(--line);color:var(--ink-2);text-decoration:none}
.toc a:hover{color:var(--blue);border-color:var(--blue)}
.prose{max-width:74ch;font-size:17.5px}
.prose h2{font-size:clamp(23px,2.4vw,28px);margin:1.8em 0 .6em}
.prose h3{font-size:21px;margin:1.6em 0 .5em}
.prose h4,.prose h5{font-size:18px;margin:1.4em 0 .5em}
.prose ul,.prose ol{padding-left:1.3em;margin:0 0 1.1em}
.prose li{margin:.3em 0}
.prose li::marker{color:var(--gold-deep)}
.prose hr{border:0;border-top:1px solid var(--line);margin:2.2em 0}
.prose img{border-radius:var(--r-m);margin:1.4em 0}
.prose blockquote{margin:1.4em 0;padding:4px 0 4px 20px;border-left:3px solid var(--gold);color:var(--ink-2)}
.prose .tbl-wrap{max-width:none}
.prose>*:first-child{margin-top:0}
.prose code{font-size:.92em;background:var(--paper);padding:1px 5px;border-radius:4px}
.note{border-left:3px solid var(--blue);background:var(--blue-soft);padding:14px 18px;border-radius:0 var(--r-s) var(--r-s) 0;font-size:15.5px;color:var(--ink);margin:0 0 1.4em}
.formula-line{font-size:clamp(22px,3vw,34px);font-weight:600;letter-spacing:-.01em;font-variant-numeric:tabular-nums}

/* ---------- steps (real sequences only) ---------- */
.steps{list-style:none;margin:0;padding:0;counter-reset:s;display:grid;gap:0}
.steps>li{counter-increment:s;position:relative;padding:0 0 26px 56px}
.steps>li::before{content:counter(s);position:absolute;left:0;top:0;width:34px;height:34px;border-radius:50%;background:#fff;border:2px solid var(--gold);display:grid;place-items:center;font-weight:700;font-size:15px;color:var(--gold-deep)}
.steps>li::after{content:"";position:absolute;left:16px;top:36px;bottom:2px;width:2px;background:var(--line)}
.steps>li:last-child::after{display:none}
.steps b{display:block;font-size:17px;margin-bottom:3px}
.steps p{margin:0;color:var(--ink-2);font-size:15.5px}

/* ---------- product ---------- */
.prod-hero{display:grid;grid-template-columns:.8fr 1.2fr;gap:48px;align-items:center}
.prod-hero .ph-img{background:linear-gradient(180deg,#fff,var(--paper));border:1px solid var(--line);border-radius:var(--r-l);padding:24px;display:grid;place-items:center}
.prod-hero .ph-img img{max-height:440px;width:auto}
@media (max-width:900px){.prod-hero{grid-template-columns:1fr}}
.kv{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r-m);overflow:hidden;margin:24px 0}
.kv div{background:#fff;padding:14px 16px}
.kv b{display:block;font-size:20px;font-variant-numeric:tabular-nums;letter-spacing:-.01em}
.kv span{font-size:13px;color:var(--ink-3)}
@media (max-width:560px){.kv{grid-template-columns:1fr 1fr}}
.warn-flag{display:inline-block;background:#FFF4E0;border:1px solid #F2D29A;color:#7A4D00;border-radius:var(--r-s);padding:6px 12px;font-size:14px;font-weight:600;margin-bottom:14px}

/* ---------- docs ---------- */
.docs{display:grid;gap:12px}
.doc{display:grid;grid-template-columns:48px 1fr auto;gap:16px;align-items:center;padding:16px 18px;border:1px solid var(--line);border-radius:var(--r-m);background:#fff}
.doc .ico{width:48px;height:56px;border-radius:6px;background:var(--blue-soft);color:var(--blue);display:grid;place-items:center;font-size:12px;font-weight:700}
.doc.pdf .ico{background:#FCEBEA;color:#A8321E}
.doc b{display:block;font-size:16.5px}
.doc span{font-size:14px;color:var(--ink-3)}
@media (max-width:560px){.doc{grid-template-columns:40px 1fr}.doc .btn{grid-column:1/-1}}

/* ---------- forms ---------- */
.form{display:grid;gap:16px}
.form .row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media (max-width:640px){.form .row{grid-template-columns:1fr}}
.field label{display:block;font-size:14px;font-weight:600;margin-bottom:6px;color:var(--ink)}
.field input,.field select,.field textarea{width:100%;min-height:48px;border:1px solid var(--line);border-radius:var(--r-s);padding:10px 14px;font:500 16px var(--f);color:var(--ink);background:#fff}
.field textarea{min-height:110px;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px var(--blue-soft)}
.field .hint{font-size:13px;color:var(--ink-3);margin-top:5px}
.check{display:flex;gap:10px;align-items:flex-start;font-size:14px;color:var(--ink-2)}
.check input{margin-top:4px;width:18px;height:18px;accent-color:var(--blue)}
.form-status{font-size:15px;padding:12px 16px;border-radius:var(--r-s);display:none}
.form-status.ok{display:block;background:#E6F4EC;color:var(--ok)}
.form-status.err{display:block;background:#FDECEA;color:var(--err)}
.hp{position:absolute;left:-5000px}
.panel{background:#fff;border:1px solid var(--line);border-radius:var(--r-l);padding:clamp(22px,3vw,36px);box-shadow:var(--shadow)}

/* ---------- calculator ---------- */
.calc{display:grid;grid-template-columns:1.1fr .9fr;gap:28px;align-items:start}
@media (max-width:960px){.calc{grid-template-columns:1fr}}
.seg{display:inline-flex;border:1px solid var(--line);border-radius:var(--r-s);overflow:hidden;flex-wrap:wrap}
.seg button{border:0;background:#fff;padding:10px 16px;font:600 14.5px var(--f);color:var(--ink-2);cursor:pointer}
.seg button+button{border-left:1px solid var(--line)}
.seg button[aria-pressed="true"]{background:var(--blue);color:#fff}
.range-row{display:grid;grid-template-columns:1fr 110px;gap:12px;align-items:center}
.range-row input[type=range]{accent-color:var(--gold-deep);min-height:auto;padding:0;border:0}
.out{background:var(--ink);color:#fff;border-radius:var(--r-l);padding:28px}
.out h3{color:#fff;font-size:18px;margin-bottom:18px}
.out dl{margin:0;display:grid;gap:0}
.out dl div{display:flex;justify-content:space-between;gap:12px;padding:12px 0;border-bottom:1px solid rgba(255,255,255,.12)}
.out dt{color:#AEB8C6;font-size:15px}
.out dd{margin:0;font-weight:700;font-size:18px;font-variant-numeric:tabular-nums;text-align:right}
.out .big{padding:18px 0 6px}
.out .big dd{font-size:34px;color:var(--gold)}
.out small{display:block;color:#AEB8C6;font-size:13px;margin-top:14px;line-height:1.45}

/* ---------- industrial flow ---------- */
.flow{display:grid;grid-template-columns:repeat(7,1fr);gap:10px;counter-reset:f}
.flow li{list-style:none;counter-increment:f;border:1px solid var(--line);border-radius:var(--r-m);padding:14px;background:#fff;font-size:14px;line-height:1.35;position:relative}
.flow li::before{content:counter(f);display:block;font-weight:700;color:var(--ink-3);font-size:13px;margin-bottom:6px}
.flow li b{display:block;font-size:15px;margin-bottom:4px}
.flow li.hl{background:var(--ink);color:#E5E9F0;border-color:var(--ink)}
.flow li.hl b{color:var(--gold)}
@media (max-width:1100px){.flow{grid-template-columns:repeat(4,1fr)}}
@media (max-width:640px){.flow{grid-template-columns:1fr 1fr}}

/* ---------- CTA band ---------- */
.band{display:grid;grid-template-columns:1fr auto;gap:28px;align-items:center;padding:clamp(28px,4vw,44px);border-radius:var(--r-l);background:var(--blue-deep);color:#DCE7F4;position:relative;overflow:hidden}
.band h2{color:#fff;font-size:clamp(22px,2.6vw,30px);margin-bottom:6px}
.band p{margin:0;max-width:58ch}
.band .lattice{right:-40px;top:-30px;opacity:.25}
@media (max-width:760px){.band{grid-template-columns:1fr}}

/* ---------- footer ---------- */
.ftr{background:var(--ink);color:#AEB8C6;font-size:15px;padding:64px 0 28px;margin-top:0}
.ftr a{color:#E5E9F0;text-decoration:none}
.ftr a:hover{color:var(--gold)}
.ftr-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr 1.3fr;gap:36px}
.ftr h4{color:#fff;font-size:15px;margin-bottom:14px}
.ftr ul{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.ftr .brand{color:#fff}
.ftr .brand small{color:#8C97A7}
.ftr details{margin-top:6px}
.ftr summary{cursor:pointer;color:#E5E9F0}
.ftr dl{display:grid;grid-template-columns:auto 1fr;gap:4px 12px;margin:10px 0 0;font-size:14px}
.ftr dd{margin:0;color:#E5E9F0;font-variant-numeric:tabular-nums;word-break:break-word}
.ftr-bottom{border-top:1px solid rgba(255,255,255,.1);margin-top:44px;padding-top:22px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13.5px}
@media (max-width:900px){.ftr-grid{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.ftr-grid{grid-template-columns:1fr}}

.sk-badge{display:inline-flex;align-items:center;gap:10px;border:1px solid var(--line);border-radius:var(--r-s);padding:8px 14px;font-size:14px;font-weight:600;background:#fff}
.sk-badge i{width:26px;height:26px;border-radius:50%;background:var(--ink);color:#fff;display:grid;place-items:center;font-style:normal;font-size:13px;font-weight:700}
.aside>*{min-width:0}
.aside .doc{grid-template-columns:40px 1fr;gap:12px;padding:14px}
.aside .doc .ico{width:40px;height:48px}
.aside .doc .btn{grid-column:1/-1}
.prod-hero h1{font-size:clamp(30px,3.4vw,44px)}
.ph-img img{mix-blend-mode:multiply}
.flow{padding:0;margin:0}
.hero-dark{background:var(--ink)!important}
.hero-dark .crumbs,.hero-dark .crumbs a,.hero-dark .crumbs li{color:#C9D2DE}
.hero-dark .crumbs li+li::before{color:#6B7a8c}
.hero-dark .btn-line{background:transparent;color:#fff;border-color:rgba(255,255,255,.35)}
.hero-dark .btn-line:hover{border-color:#fff;color:#fff}
@media (max-width:900px){.prod-hero .ph-img img,.prod-hero .ph-img svg{max-height:280px;width:auto}}

/* ---------- v2: флагман, история, каталог, партнёры ---------- */
.eyebrow{font-size:13px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--gold-deep);margin:0 0 10px}
.hero-visual{position:relative}
.hero-visual img{position:relative;mix-blend-mode:multiply}
.hero-lattice{position:absolute;right:-60px;top:12%;width:120%;opacity:.5;z-index:0}
.hero{background:radial-gradient(90% 70% at 85% 40%,#F4EEDF 0%,rgba(244,238,223,0) 60%),linear-gradient(180deg,#fff 0%,var(--paper) 100%)}
.flagship{display:grid;grid-template-columns:.85fr 1.15fr;gap:clamp(28px,5vw,72px);align-items:center}
.flagship-img{border-radius:var(--r-l);background:radial-gradient(70% 60% at 50% 55%,#FBF3E1,#fff 70%);border:1px solid var(--line);display:grid;place-items:center;padding:24px;overflow:hidden}
.flagship-img img{max-height:520px;width:auto;mix-blend-mode:multiply}
.flagship-card{border:1px solid var(--line);border-radius:var(--r-l);padding:clamp(20px,3vw,36px);background:#fff;box-shadow:var(--shadow)}
.flagship h2{font-size:clamp(26px,2.8vw,34px)}
.also{margin-top:20px;padding-top:16px;border-top:1px solid var(--line);font-size:15px;color:var(--ink-2)}
@media (max-width:900px){.flagship{grid-template-columns:1fr}.flagship-img img{max-height:340px}}
.catalog-list{display:grid;gap:12px}
.cat-row{display:grid;grid-template-columns:80px 1fr auto;gap:18px;align-items:center;padding:14px 20px;border:1px solid var(--line);border-radius:var(--r-m);background:#fff;color:var(--ink);text-decoration:none}
.cat-row:hover{border-color:var(--blue)}
.cat-row b{display:block;font-size:17px}
.cat-row .muted{font-size:15px}
.cat-row .more{font-weight:600;color:var(--blue);font-size:15px;white-space:nowrap}
.cat-thumb{display:grid;place-items:center;background:var(--paper);border-radius:var(--r-s);height:96px}
@media (max-width:560px){.cat-row{grid-template-columns:60px 1fr}.cat-row .more{grid-column:2}}
.hstrip{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(4,1fr);gap:0;position:relative}
.hstrip li{padding:28px 24px 0 0;position:relative;border-top:2px solid var(--line)}
.hstrip li::before{content:"";position:absolute;top:-8px;left:0;width:14px;height:14px;border-radius:50%;background:#fff;border:3px solid var(--gold)}
.hstrip .tl-when{display:block;font-size:22px;font-weight:700;letter-spacing:-.02em;color:var(--ink);margin-bottom:6px}
.hstrip p{margin:0;color:var(--ink-2);font-size:15.5px}
@media (max-width:900px){.hstrip{grid-template-columns:1fr 1fr;row-gap:28px}}
@media (max-width:520px){.hstrip{grid-template-columns:1fr}}
.timeline{list-style:none;padding:0!important;margin:0 0 1.4em;position:relative}
.timeline::before{content:"";position:absolute;left:7px;top:6px;bottom:6px;width:2px;background:var(--line)}
.timeline>li{position:relative;padding:0 0 26px 36px;margin:0}
.timeline>li::before{content:"";position:absolute;left:0;top:5px;width:16px;height:16px;border-radius:50%;background:#fff;border:3px solid var(--gold)}
.timeline>li::marker{content:""}
.timeline .tl-when{display:inline-block;font-size:13px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--gold-deep);margin-bottom:4px}
.timeline b{display:block;font-size:19px;margin-bottom:4px}
.timeline p{margin:0;color:var(--ink-2)}
.hist-hero{background:linear-gradient(180deg,#fff,var(--paper));border-bottom:1px solid var(--line);padding-bottom:48px}
.hist-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;margin-top:24px}
.hist-grid .formula-line{margin:6px 0 18px;color:var(--blue-deep)}
@media (max-width:900px){.hist-grid{grid-template-columns:1fr}}
.gets{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.gets li{background:#fff;border:1px solid var(--line);border-radius:var(--r-m);padding:22px;border-top:3px solid var(--gold)}
.gets b{display:block;font-size:17px;margin-bottom:6px}
.gets p{margin:0;color:var(--ink-2);font-size:15.5px}
@media (max-width:900px){.gets{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.gets{grid-template-columns:1fr}}
.steps-row{grid-template-columns:repeat(3,1fr);gap:24px}
.steps-row>li{padding:44px 0 0;border-top:2px solid var(--line)}
.steps-row>li::before{top:-18px}
.steps-row>li::after{display:none}
@media (max-width:760px){.steps-row{grid-template-columns:1fr}}
.prod-hero-sm .ph-img svg{max-height:300px}
.sample-img{max-width:220px;margin-top:24px}
.sample-img img{mix-blend-mode:multiply}
.photo picture,.photo img{display:block;width:100%;height:auto}
.band-light{background:var(--gold-soft);color:var(--ink)}
.band-light h2{color:var(--ink)}
.chip[aria-pressed="true"] .n{opacity:.8}
.layout>*,.split>*,.flagship>*,.hist-grid>*{min-width:0}
@media (max-width:1000px){.layout{grid-template-columns:minmax(0,1fr)}}
.warn-flag{max-width:100%}
@media (max-width:900px){.hero-visual.hide-m{display:none}}

/* ---------- v3: правки по итогам ревью ---------- */
:root{--gold-deep:#8A6418;--paper:#F2F5F9}
h1,h2,h3,h4,h5,.el .sym,.hstrip .tl-when,.brand,.fact b,.kv b{font-weight:600}
h1{letter-spacing:-.03em}
.hero h1{font-size:clamp(40px,5.2vw,68px)}
.hero{background:radial-gradient(80% 70% at 85% 40%,#E9EDF3 0%,rgba(233,237,243,0) 65%),linear-gradient(180deg,#fff 0%,var(--paper) 100%)}
.sec{padding:clamp(48px,6.5vw,88px) 0}
.hero-facts{margin-top:-48px;position:relative;z-index:2}
.hero .wrap{padding-bottom:88px}
.creds{display:flex;flex-wrap:wrap;gap:8px 20px;margin:22px 0 0;padding:0;list-style:none;font-size:14px;color:var(--ink-2)}
.creds li{display:flex;align-items:center;gap:8px}
.creds li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--gold)}
.hero-formula-tag{position:absolute;right:-6%;top:16%;z-index:2;font-size:clamp(20px,2.2vw,28px);font-weight:600;color:var(--ink);background:rgba(255,255,255,.82);backdrop-filter:blur(4px);padding:8px 14px;border-radius:10px;line-height:1.1}
.hero-formula-tag small{display:block;font-size:12px;font-weight:500;color:var(--ink-3)}
@media (max-width:900px){.hero-visual{order:0!important;width:min(62%,240px)!important;margin:0 auto}.hero-formula-tag{right:-30%;font-size:18px}.hero-facts{margin-top:0}}
/* светлый подвал как в наброске */
.ftr{background:#fff;border-top:1px solid var(--line);color:var(--ink-3)}
.ftr a{color:var(--ink-2)}.ftr a:hover{color:var(--blue)}
.ftr h4,.ftr .brand{color:var(--ink)}.ftr .brand small{color:var(--ink-3)}
.ftr-bottom{border-top-color:var(--line)}
/* светлые баннеры-призывы */
.band{background:var(--clean);color:var(--ink-2)}
.band h2{color:var(--ink)}
.band .lattice{opacity:.55}
/* карточки */
.card,.el,.gets li,.cat-row{box-shadow:0 1px 2px rgba(31,41,55,.05);transition:border-color .15s,box-shadow .15s,transform .15s}
.card:hover,.el:hover,.cat-row:hover{box-shadow:var(--shadow);transform:translateY(-2px)}
.card:focus-visible,.chip:focus-visible,.btn:focus-visible,.el:focus-visible{outline:2px solid var(--blue);outline-offset:2px}
.card p{display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.card .meta time.hide{display:none}
@media (max-width:480px){.facts{grid-template-columns:1fr 1fr}.fact{padding:16px;flex-direction:column;gap:8px}.fact+.fact{border-top:0}.fact:nth-child(odd){border-left:0}.fact:nth-child(even){border-left:1px solid var(--line)}.fact:nth-child(n+3){border-top:1px solid var(--line)}}
/* таймлайн на мобильном — вертикальная линия */
@media (max-width:760px){.hstrip{grid-template-columns:1fr;row-gap:0;padding-left:28px}.hstrip li{border-top:0;border-left:2px solid var(--line);padding:0 0 22px 22px;margin-left:-28px}.hstrip li::before{top:4px;left:-8px}}
/* хлебные крошки на мобильном */
@media (max-width:640px){.crumbs ol{flex-wrap:nowrap;overflow-x:auto;white-space:nowrap;scrollbar-width:none}}
.field select{text-overflow:ellipsis;padding-right:36px}
.prose{max-width:68ch}
.hist-hero .photo{background:none}
.hist-hero .photo img{mix-blend-mode:multiply}
.prose h2 a{color:inherit;text-decoration-color:var(--gold);text-decoration-thickness:2px}
.spec td:last-child{font-weight:500}
/* v4: продукция под заказ */
.order-card{padding:0;overflow:hidden}
.order-card .oc-img{background:linear-gradient(180deg,#fff,var(--paper));display:grid;place-items:center;padding:18px 18px 0;border-bottom:1px solid var(--line)}
.order-card .oc-img img{height:220px;width:auto;mix-blend-mode:multiply;transition:transform .3s}
.order-card:hover .oc-img img{transform:translateY(-4px)}
.order-card .body{display:flex;flex-direction:column;flex:1;padding:18px 20px 20px}
.order-card .body .tag{align-self:flex-start}
.oc-foot{margin-top:auto;display:flex;justify-content:space-between;align-items:baseline;flex-wrap:wrap;gap:4px 10px;padding-top:12px;border-top:1px solid var(--line)}
.oc-foot>*{white-space:nowrap}
.oc-price{font-weight:600;font-size:15px;color:var(--ink)}
.order-card .more{margin:0}
.thumb64 img{height:88px;width:auto;mix-blend-mode:multiply}
.order-group{margin-bottom:40px}.order-group h2{font-size:24px;margin-bottom:8px}.order-group>p{margin:0 0 16px;max-width:70ch}
.cat-row-sm{grid-template-columns:1fr auto;padding:12px 16px}.cat-row-sm b{font-size:16px}
.terms{list-style:none;margin:0;padding:0;display:grid;gap:12px}.terms li{display:grid;gap:2px;font-size:14.5px}.terms b{font-weight:600}.terms span{color:var(--ink-2)}
.cat-row b .tag{vertical-align:middle;margin-left:6px}
@media (max-width:560px){.cat-row-sm{grid-template-columns:1fr auto}.cat-row-sm .more{grid-column:auto}.order-card .oc-img img{height:180px}}
/* v4: персона — В.Н. Андриевский */
.person{display:grid;grid-template-columns:220px 1fr;gap:32px;align-items:start;margin:8px 0 40px}
.person-card{position:sticky;top:96px;display:grid;gap:6px;padding:24px 20px;border:1px solid var(--line);border-radius:var(--r-l);background:linear-gradient(180deg,#fff,var(--paper));text-align:center}
.person-mono{display:grid;place-items:center;width:96px;height:96px;margin:0 auto 10px;border-radius:50%;background:radial-gradient(circle at 30% 30%,#F3D58C,var(--gold) 55%,#B98A2A);color:#fff;font-weight:700;font-size:32px;letter-spacing:.02em;box-shadow:0 0 0 6px #fff,0 0 0 7px var(--line)}
.person-card b{font-size:18px}.person-card span:last-child{font-size:13.5px;color:var(--ink-3);line-height:1.45}
.person-facts{list-style:none;padding:0!important;margin:20px 0;display:grid;gap:0;border-left:2px solid var(--gold)}
.person-facts li{display:grid;grid-template-columns:180px 1fr;gap:16px;padding:12px 0 12px 20px;margin:0!important;border-bottom:1px solid var(--line)}
.person-facts li:last-child{border-bottom:0}
.person-facts b{font-size:15px;color:var(--gold-deep)}.person-facts span{font-size:16px}
.pull{margin:24px 0 0;padding:20px 24px;border-radius:var(--r-m);background:var(--paper);border-left:4px solid var(--blue);font-size:17px;line-height:1.55;color:var(--ink)}
@media (max-width:760px){.person{grid-template-columns:1fr}.person-card{position:static}.person-facts li{grid-template-columns:1fr;gap:4px}}
/* v4.1: персона в узкой колонке статьи */
.person{grid-template-columns:1fr;gap:20px}
.person-card{position:static;display:grid;grid-template-columns:auto 1fr;grid-template-rows:auto auto;column-gap:20px;row-gap:2px;align-items:center;text-align:left;padding:20px 22px}
.person-mono{grid-row:1/3;width:76px;height:76px;margin:0;font-size:26px}
.person-card b{align-self:end}.person-card span:last-child{align-self:start}
.person-facts li{grid-template-columns:150px 1fr}
.prose blockquote.pull{border-left:4px solid var(--blue);background:var(--paper);font-style:normal}
@media (max-width:560px){.person-facts li{grid-template-columns:1fr}}
@media (max-width:640px){.order-grid{grid-template-columns:1fr 1fr;gap:12px}.order-card .oc-img{padding:10px 10px 0}.order-card .oc-img img{height:150px}.order-card .body{padding:12px 14px 14px}.order-card h3{font-size:16px}.order-card p{font-size:13.5px}.order-card .tag{font-size:11px}}
.order-card .body .tag{white-space:normal;line-height:1.25;padding-top:4px;padding-bottom:4px;height:auto}
.order-grid{grid-template-columns:repeat(5,minmax(0,1fr))}
@media (max-width:1180px){.order-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
.prose .note{font-size:15px;color:var(--ink-2);background:var(--paper);border-radius:var(--r-s);padding:12px 16px}
/* v5: иллюстрации разделов */
.photo.ill,.flagship-img.ill{background:#13233A;border:0;box-shadow:0 18px 40px -24px rgba(15,35,60,.55)}
.photo.ill img,.flagship-img.ill img,.hero-visual.ill img{mix-blend-mode:normal}
.flagship-img.ill{padding:0}.flagship-img.ill picture{display:block;width:100%;height:100%}.flagship-img.ill img{width:100%;height:100%;max-height:none;object-fit:cover}
.page-head.head-ill{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:40px;align-items:center}
.page-head.head-ill .photo{max-width:440px;justify-self:end;width:100%}
@media (max-width:900px){.page-head.head-ill{grid-template-columns:1fr;gap:20px}.page-head.head-ill .photo{justify-self:stretch;max-width:none}}
/* v6: материалы для лабораторий */
.ftr-grid{grid-template-columns:1.3fr 1fr 1fr 1fr 1.3fr;gap:28px}
@media (max-width:1100px){.ftr-grid{grid-template-columns:1fr 1fr 1fr}}
@media (max-width:900px){.ftr-grid{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.ftr-grid{grid-template-columns:1fr}}
.aud .card .tag{align-self:flex-start}
.spec-text{border:1px dashed var(--gold);background:#FFFBF0;border-radius:var(--r-m);padding:16px 20px;margin:12px 0}
.spec-text p{margin:0;font-size:15.5px;line-height:1.6}
.doc .tag{white-space:nowrap}
.toc a[aria-current]{font-weight:600}
.lang-switch{font-size:13px;font-weight:600;color:var(--ink-3);text-decoration:none;padding:6px 8px}
.ftr-grid.ftr-en{grid-template-columns:1.3fr 1fr 1.3fr}
@media (max-width:900px){.ftr-grid.ftr-en{grid-template-columns:1fr}}
@media (max-width:900px){.nav-en{display:none}}
.aud .card p{display:block;-webkit-line-clamp:unset;line-clamp:unset;overflow:visible}
.prose table.norms{font-size:14.5px}
.prose table.norms td{vertical-align:top}