/* Внутренние страницы: материалы и 404. Язык тот же, что на главной */
:root{
  --bg:#eceeec; --paper:#f6f7f5; --ink:#121517; --mute:#5b6266; --line:rgba(18,21,23,.14);
  --lap:#f2b705; --rust:#b4511e; --dark:#1a1816;
  --l1:#d8d4c8; --l2:#b9b5a9; --l3:#8c8981; --l4:var(--lap); --llkm:#4f5250;
  --gut:clamp(16px,4vw,64px); --ease:cubic-bezier(.16,1,.3,1);
  --sans:'Onest',system-ui,sans-serif; --mono:'JetBrains Mono',ui-monospace,monospace;
  --noise:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 .5 0'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)'/%3E%3C/svg%3E");
}
*{box-sizing:border-box;margin:0}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:90px}
body{background:var(--bg);color:var(--ink);font:400 17px/1.55 var(--sans);overflow-x:hidden}
a{color:inherit}
button{font:inherit;color:inherit;cursor:pointer}
img{max-width:100%;height:auto;display:block}
.mono{font-family:var(--mono);font-size:12px;letter-spacing:.04em;text-transform:uppercase}
.wrap{padding:0 var(--gut);max-width:1760px;margin:0 auto}
a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--ink);outline-offset:3px;border-radius:8px}
.skip{position:absolute;left:12px;top:-60px;z-index:50;padding:10px 16px;border-radius:999px;background:var(--ink);color:#fff;text-decoration:none}
.skip:focus{top:12px}
.rv{opacity:0;transition:opacity .8s var(--ease)}
.rv.in{opacity:1}

/* кнопки */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;border:0;border-radius:999px;padding:13px 22px;min-height:48px;font-weight:500;font-size:15px;text-decoration:none;white-space:nowrap;transition:transform .25s,background .25s,box-shadow .25s}
.btn:hover{transform:translateY(-1px)}
.btn:active{transform:translateY(0) scale(.98)}
.btn-ink{background:var(--ink);color:#fff}
.btn-lap{background:var(--lap);color:var(--ink)}
.btn-lap:hover{box-shadow:0 10px 26px rgba(242,183,5,.35)}
.btn-ghost{background:rgba(255,255,255,.55);color:var(--ink);box-shadow:inset 0 0 0 1px var(--line)}

/* шапка */
.top{position:fixed;z-index:20;top:14px;left:var(--gut);right:var(--gut);display:flex;align-items:center;gap:24px;
  padding:10px 10px 10px 20px;border-radius:999px;background:rgba(246,247,245,.74);
  -webkit-backdrop-filter:blur(14px) saturate(1.3);backdrop-filter:blur(14px) saturate(1.3);box-shadow:0 1px 0 rgba(18,21,23,.06)}
.logo{font-weight:700;letter-spacing:.14em;font-size:15px;text-decoration:none;display:flex;align-items:center;gap:10px}
.logo i{width:18px;height:18px;border-radius:50%;background:radial-gradient(circle at 35% 30%,#fff 0 12%,#c9ccc9 40%,#8d9294 100%);box-shadow:inset 0 0 0 1px rgba(0,0,0,.12)}
.top nav{display:flex;gap:clamp(14px,1.6vw,24px);margin-left:auto;font-size:15px}
.top nav a{position:relative;padding:6px 0;text-decoration:none;color:var(--mute);transition:color .2s}
.top nav a::after{content:"";position:absolute;left:0;right:0;bottom:0;height:1.5px;background:var(--ink);transform:scaleX(0);transform-origin:left;transition:transform .45s var(--ease)}
.top nav a:hover{color:var(--ink)}
.top nav a[aria-current]{color:var(--ink)}
.top nav a[aria-current]::after{transform:scaleX(1)}
.top .tel{font:500 14px var(--mono);letter-spacing:.02em;text-decoration:none;white-space:nowrap}
.top .btn{padding:10px 18px;min-height:44px}
.ico{display:none;width:44px;height:44px;border:0;border-radius:50%;background:rgba(18,21,23,.06);place-items:center;flex:none;text-decoration:none}
.ico svg{width:20px;height:20px}
.sheet{position:fixed;inset:0;z-index:30;pointer-events:none}
.sheet-bg{position:absolute;inset:0;background:rgba(18,21,23,.4);opacity:0;transition:opacity .4s}
.sheet-p{position:absolute;left:8px;right:8px;bottom:8px;padding:10px 22px 22px;border-radius:24px;background:var(--paper);transform:translateY(105%);transition:transform .55s var(--ease);box-shadow:0 -10px 50px rgba(0,0,0,.2)}
.sheet.open{pointer-events:auto}
.sheet.open .sheet-bg{opacity:1}
.sheet.open .sheet-p{transform:none}
.sheet:not(.open) .sheet-p{visibility:hidden;transition:transform .45s var(--ease),visibility 0s .45s}
.sheet nav{display:grid}
.sheet nav a{display:flex;justify-content:space-between;align-items:center;min-height:54px;font-size:22px;font-weight:500;letter-spacing:-.01em;text-decoration:none;border-bottom:1px solid var(--line)}
.sheet nav a span{font:500 12px var(--mono);color:var(--mute)}
.sheet-f{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:18px}

/* заголовки секций */
.sec{padding:clamp(80px,10vw,150px) 0}
.sec-paper{background:var(--paper)}
.sec-h .mono{color:var(--mute);display:flex;align-items:center;gap:10px}
.sec-h h2{font-weight:500;font-size:clamp(32px,4vw,60px);line-height:1.04;letter-spacing:-.03em;margin:18px 0 18px}
.sec-h p{font-size:clamp(16px,1.2vw,18px);color:#30363a;max-width:560px}
.two{display:grid;grid-template-columns:1fr 1.25fr;gap:clamp(30px,6vw,110px);align-items:start}

/* первый экран материала */
.pg{position:relative;min-height:min(92vh,960px);display:flex;align-items:flex-end;padding:clamp(120px,16vh,180px) 0 clamp(40px,6vw,80px);overflow:hidden;background:#2a2421;color:#f3ede8}
.pg-bg{position:absolute;inset:0;z-index:0}
.pg-bg img{width:100%;height:100%;object-fit:cover;transform:scale(1.06);animation:settle 2.4s var(--ease) both}
@keyframes settle{to{transform:scale(1)}}
.pg::after{content:"";position:absolute;inset:0;z-index:0;background:linear-gradient(90deg,rgba(18,14,11,.78) 0%,rgba(18,14,11,.45) 48%,rgba(18,14,11,.05) 80%),linear-gradient(0deg,rgba(18,14,11,.7),rgba(18,14,11,0) 45%)}
.pg .wrap{position:relative;z-index:1;width:100%;display:grid;grid-template-columns:1.4fr 1fr;gap:clamp(30px,5vw,90px);align-items:end}
.crumbs{list-style:none;padding:0;display:flex;flex-wrap:wrap;gap:6px 10px;font:500 12px var(--mono);letter-spacing:.04em;text-transform:uppercase;color:rgba(243,237,232,.6)}
.crumbs li+li::before{content:"/";margin-right:10px;opacity:.5}
.crumbs a{text-decoration:none}
.crumbs a:hover{color:#fff}
.pg .kind{display:inline-block;margin-top:26px;color:var(--lap)}
.pg h1{font-weight:600;font-size:clamp(44px,6.4vw,110px);line-height:.95;letter-spacing:-.045em;margin:14px 0 22px}
.pg .lead{font-size:clamp(17px,1.35vw,21px);max-width:620px;color:rgba(243,237,232,.86)}
.pg .cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}
.pg .btn-ghost{background:rgba(255,255,255,.1);color:#fff;box-shadow:inset 0 0 0 1px rgba(255,255,255,.25)}
.sys{border-top:1px solid rgba(243,237,232,.5)}
.sys .mono{color:rgba(243,237,232,.6);display:block;padding:14px 0 6px}
.sys ol{list-style:none;padding:0;display:flex;flex-direction:column-reverse}
.sys li a,.sys li>span{display:grid;grid-template-columns:32px 1fr;align-items:center;gap:12px;padding:12px 0;border-bottom:1px solid rgba(243,237,232,.16);text-decoration:none;font-size:15px;color:rgba(243,237,232,.75);transition:background .25s,color .25s}
.sys li a:hover{color:#fff}
.sys li small{font:500 11px var(--mono);color:rgba(243,237,232,.45)}
.sys li.cur>*{color:#fff;font-weight:500}
.sys li.cur small{color:var(--lap)}
.sys li.base>span{color:rgba(243,237,232,.45)}

/* цифры */
.figs{background:var(--paper);border-bottom:1px solid var(--line)}
.figs ul{list-style:none;padding:0;display:grid;grid-template-columns:repeat(4,1fr)}
.figs li{padding:clamp(24px,3vw,40px) clamp(14px,2vw,28px) clamp(24px,3vw,40px) 0;border-right:1px solid var(--line)}
.figs li+li{padding-left:clamp(14px,2vw,28px)}
.figs li:last-child{border-right:0}
.figs b{display:block;font-weight:600;font-size:clamp(26px,2.8vw,44px);letter-spacing:-.03em;line-height:1.05}
.figs span{display:block;margin-top:8px;color:var(--mute);font-size:14px}

/* свойства */
.feat{list-style:none;padding:0;counter-reset:f}
.feat li{position:relative;padding:20px 0 20px 56px;border-top:1px solid var(--line);font-size:clamp(16px,1.2vw,18px)}
.feat li:last-child{border-bottom:1px solid var(--line)}
.feat li::before{counter-increment:f;content:counter(f,decimal-leading-zero);position:absolute;left:0;top:23px;font:500 12px var(--mono);color:var(--mute)}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:28px}
.chip{display:inline-flex;align-items:center;padding:8px 14px;border-radius:999px;font-size:14px;box-shadow:inset 0 0 0 1px var(--ink)}

/* расход */
.rate{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.rate div{padding:20px 0 0;border-top:1px solid var(--ink)}
.rate b{display:flex;align-items:baseline;gap:8px;font-weight:600;font-size:clamp(46px,5vw,80px);letter-spacing:-.045em;line-height:.9}
.rate b small{font:500 13px var(--mono);letter-spacing:0;opacity:.6}
.rate span{display:block;margin-top:12px;font-size:14px;opacity:.7}
.spec{width:100%;border-collapse:collapse;margin-top:28px;font-size:15px}
.spec th,.spec td{padding:13px 0;border-top:1px solid var(--line);text-align:left;font-weight:400;vertical-align:top}
.spec th{color:var(--mute);padding-right:20px}
.spec td{font-family:var(--mono);font-size:14px;text-align:right}
.uses{list-style:none;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:0 30px}
.uses li{padding:16px 0;border-top:1px solid var(--line);font-size:16px}

/* технология */
.tabs{display:inline-flex;gap:4px;padding:5px;border-radius:999px;background:var(--bg);margin-bottom:24px}
.tabs button{border:0;background:transparent;padding:10px 18px;min-height:44px;border-radius:999px;font-size:15px;color:var(--mute);transition:background .25s,color .25s}
.tabs button[aria-selected=true]{background:var(--ink);color:#fff}
.proc{list-style:none;padding:0;counter-reset:p}
.proc li{position:relative;display:grid;grid-template-columns:52px 1fr;gap:0 18px;padding:0 0 26px}
.proc li::before{counter-increment:p;content:counter(p,decimal-leading-zero);grid-row:1/3;padding-top:9px;font:500 12px var(--mono);color:var(--mute)}
.proc li{border-top:1px solid var(--line);padding-top:16px}
.proc h3{font-weight:500;font-size:18px;letter-spacing:-.01em;padding-top:6px}
.proc p{color:#30363a;margin-top:6px;max-width:640px}
.warn{margin-top:26px;padding:4px 0 4px 18px;border-left:2px solid var(--lap)}
.warn b{display:block;font:500 12px var(--mono);letter-spacing:.04em;text-transform:uppercase;margin-bottom:6px}
.warn.safe{border-left-color:var(--line)}

/* заявка */
.ask{background:var(--paper);padding:clamp(80px,10vw,140px) 0;border-top:1px solid var(--line)}
.ask-grid{display:grid;grid-template-columns:1.1fr 1fr;gap:clamp(30px,6vw,100px);align-items:start}
.form-card{padding:clamp(24px,3vw,40px);border-radius:26px;background:var(--bg)}
form{display:grid;gap:14px}
label{display:grid;gap:6px;font-size:14px;color:var(--mute)}
input,textarea{font:inherit;color:var(--ink);background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 16px;outline:0;transition:border-color .2s}
input:focus,textarea:focus{border-color:var(--ink)}
input[aria-invalid=true]{border-color:var(--rust)}
textarea{min-height:110px;resize:vertical}
form .hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
label .err{color:var(--rust);font-size:13px}
label .err:empty{display:none}
form .btn-lap{justify-self:start;min-height:52px}
form .btn-lap.busy{pointer-events:none;opacity:.7}
form .btn-lap.busy::after{content:"";width:14px;height:14px;border-radius:50%;border:2px solid currentColor;border-right-color:transparent;animation:spin .7s linear infinite}
@keyframes spin{to{transform:rotate(1turn)}}
.sent{display:flex;gap:12px;align-items:center;padding:16px 18px;border-radius:14px;background:#fff;font-weight:500;color:var(--ink)}
.sent[hidden]{display:none}
.sent i{width:28px;height:28px;border-radius:50%;background:var(--lap);display:grid;place-items:center;flex:none}
.sent i svg{width:16px;height:16px}
.fine{font-size:13px;color:var(--mute)}
.ask .phone{display:inline-flex;margin-top:26px;font:600 clamp(24px,2.4vw,34px)/1 var(--sans);letter-spacing:-.02em;text-decoration:none}

/* соседние материалы */
.pager{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid var(--line);background:var(--bg)}
.pager a{display:flex;flex-direction:column;gap:8px;padding:clamp(28px,4vw,56px) var(--gut);text-decoration:none;transition:background .3s}
.pager a+a{border-left:1px solid var(--line);text-align:right;align-items:flex-end}
.pager a:hover{background:var(--paper)}
.pager span{font:500 12px var(--mono);letter-spacing:.04em;text-transform:uppercase;color:var(--mute)}
.pager b{font-weight:500;font-size:clamp(22px,2.4vw,36px);letter-spacing:-.02em}

/* футер */
.ft{background:var(--dark);color:#f1eee9;padding:clamp(60px,8vw,110px) 0 28px;overflow:hidden}
.ft-g{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:clamp(24px,4vw,60px)}
.ft h4{font:500 11px var(--mono);letter-spacing:.06em;text-transform:uppercase;color:rgba(241,238,233,.5);margin-bottom:16px}
.ft ul{list-style:none;padding:0;display:grid;gap:8px}
.ft a{text-decoration:none;color:rgba(241,238,233,.85);transition:color .2s}
.ft a:hover{color:var(--lap)}
.ft a[aria-current]{color:var(--lap)}
.ft p{color:rgba(241,238,233,.6);font-size:15px;max-width:340px}
.ft .btn-lap{margin-top:20px;color:var(--ink)}
.ft .btn-lap:hover{color:var(--ink)}
.wordmark{font-weight:700;font-size:clamp(64px,16.4vw,300px);letter-spacing:-.055em;line-height:.8;margin:clamp(50px,7vw,100px) 0 clamp(20px,3vw,40px);white-space:nowrap;
  color:rgba(241,238,233,.92);user-select:none}
.ft-b{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-top:22px;border-top:1px solid rgba(255,255,255,.1);font-size:13px;color:rgba(241,238,233,.5)}
.ft-b a{color:rgba(241,238,233,.75)}

/* 404 */
.nf{position:relative;min-height:100vh;min-height:100svh;display:grid;align-items:end;padding:120px 0 clamp(40px,7vw,90px);overflow:hidden;background:#2a2421;color:#f3ede8}
.nf-bg{position:absolute;inset:0}
.nf-bg img{width:100%;height:100%;object-fit:cover;filter:saturate(.6) brightness(.7)}
.nf::after{content:"";position:absolute;inset:0;background:linear-gradient(0deg,rgba(18,14,11,.85),rgba(18,14,11,.2) 60%)}
.nf .wrap{position:relative;z-index:1;width:100%}
.big404{font:600 clamp(110px,24vw,420px)/.8 var(--sans);letter-spacing:-.06em}
.nf .mono{color:rgba(243,237,232,.6);margin:clamp(20px,3vw,40px) 0 14px;display:block}
.nf h1{font-weight:500;font-size:clamp(32px,4vw,60px);letter-spacing:-.03em;line-height:1.05;max-width:760px}
.nf p{margin-top:16px;max-width:520px;color:rgba(243,237,232,.8)}
.nf .cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}
.nf .btn-ghost{background:rgba(255,255,255,.1);color:#fff;box-shadow:inset 0 0 0 1px rgba(255,255,255,.25)}

@media (max-width:1100px){.top .tel{display:none}}
@media (max-width:900px){
  .top nav,.top .btn{display:none}
  .ico{display:grid}
  .top .logo{margin-right:auto}
  .top{gap:12px}
  .pg .wrap,.two,.ask-grid{grid-template-columns:1fr}
  .pg{min-height:auto}
  .figs ul{grid-template-columns:1fr 1fr}
  .figs li{border-right:0;border-bottom:1px solid var(--line);padding-left:0!important}
  .figs li:nth-child(odd){border-right:1px solid var(--line)}
  .figs li:nth-child(even){padding-left:16px!important}
  .figs li:nth-last-child(-n+2){border-bottom:0}
  .ft-g{grid-template-columns:1fr 1fr}
  .ft-g>div:first-child{grid-column:1/-1}
}
@media (max-width:600px){
  .rate,.uses{grid-template-columns:1fr}
  .pager{grid-template-columns:1fr}
  .pager a+a{border-left:0;border-top:1px solid var(--line)}
  .feat li{padding-left:44px}
  .tabs{display:flex;width:100%}
  .tabs button{flex:1;padding:10px 8px;font-size:14px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .rv{opacity:1;transition:none}
  .pg-bg img{animation:none;transform:none}
}