@font-face { font-family: "Oswald"; font-style: normal; font-weight: 200 700; font-display: swap; src: url(fonts/oswald-cyrillic.woff2) format("woff2"); unicode-range: U+0301, U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116; }
@font-face { font-family: "Oswald"; font-style: normal; font-weight: 200 700; font-display: swap; src: url(fonts/oswald-latin.woff2) format("woff2"); unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD; }
@font-face { font-family: "Inter"; font-style: normal; font-weight: 100 900; font-display: swap; src: url(fonts/inter-var.woff2) format("woff2"); }

:root {
  --ink: #111111;
  --text: #2f3331;
  --muted: #5d6360;
  --line: #cfd3d1;          
  --green: #61b594;
  --green-d: #3d8c6c;
  --green-t: #2f7a5c;       /* зелёный для мелких меток на белом (контраст) */
  --green-b: #358060;       /* заливка кнопок с белым текстом: контраст 4,7:1 */
  --green-bd: #28634a;
  --mint: #e7f4ef;
  --mint-d: #d3ebe1;
  --paper: #ffffff;
  --dark: #0f1211;
  --head: "Oswald", "Arial Narrow", Arial, sans-serif;
  --body: "Inter", system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
  --gut: 48px;
  --sec: 150px;
}
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 76px; }
body { margin: 0; background: var(--paper); color: var(--text); font: 400 17px/1.55 var(--body); overflow-x: hidden; }
img, svg { display: block; max-width: 100%; }
img { height: auto; }
a { color: inherit; }
button, input, select, textarea { font: inherit; color: inherit; }
h1, h2, h3, p, ul, ol, dl, dd, figure { margin: 0; }
ul, ol { padding: 0; list-style: none; }
[hidden] { display: none !important; }
:focus-visible { outline: 3px solid var(--green); outline-offset: 3px; }
::selection { background: var(--green); color: #fff; }
.skip { position: absolute; left: -9999px; top: 8px; z-index: 100; background: var(--ink); color: #fff; padding: 10px 16px; }
.skip:focus { left: 8px; }
.wrap { width: 100%; max-width: 1440px; margin: 0 auto; padding: 0 var(--gut); }

/* типографика */
.lbl { display: block; font: 700 13px/1.3 var(--body); text-transform: uppercase; letter-spacing: .02em; color: var(--green-t); }
.h2 { font: 700 46px/1.04 var(--head); text-transform: uppercase; letter-spacing: -.005em; color: var(--ink); }
.h2 + p, .h2 + .about__p { margin-top: 40px; }
.sec { padding: var(--sec) 0 0; }


.btn { display: inline-flex; align-items: center; gap: 18px; min-height: 52px; padding: 5px 5px 5px 24px; border: 0; background: var(--green-b); color: #fff;
  font: 700 13px/1.2 var(--body); text-transform: uppercase; letter-spacing: .01em; text-decoration: none; cursor: pointer; transition: background .2s; }
.btn i { display: grid; place-items: center; width: 42px; height: 42px; flex: none; background: var(--green-bd); transition: transform .25s; }
.btn:hover { background: var(--green-bd); }
.btn:hover i { transform: translateX(3px); background: #1f513c; }
.btn:active { transform: translateY(1px); }
.btn--sm { min-height: 44px; padding-left: 18px; }
.btn--sm i { width: 34px; height: 34px; }
.btn--full { width: 100%; justify-content: space-between; }

/* шапка */
.hdr { position: fixed; inset: 0 0 auto 0; z-index: 50; color: #fff; transition: background .25s, color .25s; }
.hdr__bar { max-width: 1440px; margin: 0 auto; padding: 0 var(--gut); height: 72px; display: flex; align-items: center; gap: 28px; position: relative; }
.hdr__bar::after { content: ""; position: absolute; left: var(--gut); right: var(--gut); bottom: 0; height: 1px; background: currentColor; opacity: .55; } 
.hdr.is-solid { background: #fff; color: var(--ink); }
.logo { display: flex; align-items: center; gap: 10px; text-decoration: none; flex: none; }
.logo__w { font: 700 22px/1 var(--head); text-transform: uppercase; letter-spacing: .01em; }
.hdr__nav { display: flex; gap: 34px; margin: 0 auto; }
.hdr__nav a { font: 700 13px/1 var(--body); text-transform: uppercase; text-decoration: none; padding: 8px 0; position: relative; }
.hdr__nav a::after { content: ""; position: absolute; left: 0; right: 0; bottom: 2px; height: 2px; background: var(--green); transform: scaleX(0); transform-origin: left; transition: transform .25s; }
.hdr__nav a:hover::after { transform: scaleX(1); }
.hdr__navtel { display: none; }
.hdr__tels { display: flex; gap: 22px; }
.hdr__tels a { font: 700 13px/1 var(--body); text-decoration: none; white-space: nowrap; }
.hdr__cta { display: flex; align-items: center; gap: 8px; font: 700 13px/1 var(--body); text-transform: uppercase; text-decoration: none; white-space: nowrap; }
.hdr__cta i { display: grid; place-items: center; width: 20px; height: 20px; background: currentColor; }
.hdr__cta i svg { color: var(--ink); }
.hdr.is-solid .hdr__cta i svg { color: #fff; }
.hdr__cta:hover i { background: var(--green); }
.hdr__wa { display: none; }
.burger { display: none; }

/* первый экран */
.hero { position: relative; min-height: max(760px, 100svh); color: #fff; overflow: hidden; background: var(--dark); }
.hero__bg { position: absolute; inset: 0; }
.hero__bg img { width: 100%; height: 100%; object-fit: cover; }
.hero__bg::after { content: ""; position: absolute; inset: 0; background: rgba(8, 10, 9, .5); }
.hero__grid { position: relative; display: grid; grid-template-columns: 1fr 3fr; gap: 16px; padding-top: 200px; padding-bottom: 120px; }
.hero__tags { font: 700 13px/1.45 var(--body); text-transform: uppercase; padding-top: 10px; }
.hero__h { font: 700 clamp(36px, 4.6vw, 66px)/1.03 var(--head); text-transform: uppercase; letter-spacing: -.01em; max-width: 15em; }
.hero__lead { margin-top: 30px; max-width: 640px; font-size: 18px; line-height: 1.5; }
.hero__act { margin-top: 38px; display: flex; flex-wrap: wrap; align-items: center; gap: 14px 30px; }
.hero__wa { display: inline-flex; align-items: center; gap: 10px; font: 700 13px/1 var(--body); text-transform: uppercase; text-decoration: none; padding: 14px 0; }
.hero__wa svg { color: var(--green); }
.hero__wa:hover span { text-decoration: underline; text-underline-offset: 4px; }

/* сетка «метка слева — содержание справа» */
.g4 { display: grid; grid-template-columns: 1fr 3fr; gap: 16px; align-items: start; }
.g4 > .lbl { padding-top: 10px; }
.g4__main { max-width: 860px; }
.about__p { max-width: 680px; display: grid; gap: 18px; }
.tiles { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 64px; }
.tile__img { overflow: hidden; aspect-ratio: 1; background: #e9ecea; }
.tile__img img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s; }
.tile:hover .tile__img img { transform: scale(1.04); }
.tile figcaption { margin-top: 18px; }
.tile figcaption b { display: block; font: 700 22px/1.1 var(--head); text-transform: uppercase; color: var(--ink); }
.tile figcaption span { display: block; margin-top: 8px; font: 700 13px/1.3 var(--body); text-transform: uppercase; color: var(--green-t); }

/* принципы */
.sec__head { display: flex; justify-content: space-between; align-items: flex-end; gap: 32px; }
.sec__head .h2 { margin-top: 14px; max-width: 760px; }
.prin__grid { display: grid; grid-template-columns: 1fr 1fr; column-gap: 16px; margin-top: 56px; }
.pr { border-top: 1px solid var(--line); padding: 22px 0 46px; padding-right: 8%; } 
.pr__n { font: 700 13px/1 var(--body); color: var(--green-t); }
.pr__t { margin-top: 16px; font: 700 24px/1.1 var(--head); text-transform: uppercase; color: var(--ink); }
.pr p { margin-top: 14px; max-width: 600px; }
.help { background: var(--mint); padding: 28px 32px 32px; align-self: start; }
.help ul { margin-top: 16px; display: grid; gap: 8px; }
.help li { padding-left: 22px; position: relative; color: var(--ink); }
.help li::before { content: ""; position: absolute; left: 0; top: .62em; width: 10px; height: 2px; background: var(--green); }
.help__a { display: inline-flex; align-items: center; gap: 8px; margin-top: 20px; font: 700 13px/1 var(--body); text-transform: uppercase; color: var(--ink); }

/* цифры на тёмном фото */
.nums { position: relative; margin-top: var(--sec); color: #fff; background: var(--dark); overflow: hidden; }
.nums__bg { position: absolute; inset: -8% 0; }
.nums__bg img { width: 100%; height: 100%; object-fit: cover; }
.nums__bg::after { content: ""; position: absolute; inset: 0; background: rgba(8, 10, 9, .45); }
.nums__in { position: relative; padding-top: 140px; padding-bottom: 150px; }
.nums .lbl { color: var(--green); }
.nums .h2 { color: #fff; margin-top: 14px; }
.nums__grid { display: grid; grid-template-columns: repeat(4, 1fr); column-gap: 16px; row-gap: 60px; margin-top: -40px; }
.nums__head { max-width: 560px; }
.num { border-top: 1px solid rgba(255, 255, 255, .55); padding-top: 18px; } 
.num--1 { grid-column: 4; grid-row: 1; }
.num--2 { grid-column: 1; grid-row: 2; }
.num--3 { grid-column: 3; grid-row: 2; }
.num--4 { grid-column: 2; grid-row: 3; }
.num--5 { grid-column: 4; grid-row: 3; }
.num__v { display: block; font: 600 clamp(56px, 7vw, 104px)/1 var(--head); letter-spacing: -.02em; white-space: nowrap; }
.num p { margin-top: 12px; max-width: 300px; font-size: 16px; line-height: 1.45; }

/* список услуг */
.srows { margin-top: 64px; }
.srow { border-top: 1px solid var(--line); } 
.srow:last-child { border-bottom: 1px solid var(--line); } 
.srow__head { width: 100%; display: grid; grid-template-columns: 1fr 2fr 1fr; gap: 16px; align-items: start; padding: 26px 0 30px; background: none; border: 0; text-align: left; cursor: pointer; }
.srow__n { font: 700 13px/1 var(--body); color: var(--green-t); padding-top: 6px; }
.srow__t { font: 700 24px/1.12 var(--head); text-transform: uppercase; color: var(--ink); max-width: 640px; transition: color .2s; }
.srow__more { justify-self: end; display: flex; align-items: center; gap: 10px; font: 700 13px/1 var(--body); text-transform: uppercase; color: var(--ink); white-space: nowrap; padding-top: 4px; }
.srow__more i { display: grid; place-items: center; width: 22px; height: 22px; background: var(--ink); color: #fff; transition: transform .25s, background .2s; }
.srow__head:hover .srow__t { color: var(--green-d); }
.srow__head:hover .srow__more i { background: var(--green); }
.srow__head[aria-expanded="true"] .srow__more i { transform: rotate(45deg); background: var(--green); }
.srow__body { display: grid; grid-template-columns: 1fr 2fr 1fr; gap: 16px; padding: 0 0 34px; }
.srow__body p { grid-column: 2; max-width: 640px; }
.srow__body .btn { grid-column: 3; justify-self: end; align-self: start; }

/* четыре квадрата с заявкой */
.quad { padding-top: 120px; }
.quad__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.quad__img { aspect-ratio: 1; overflow: hidden; background: #e9ecea; }
.quad__img img { width: 100%; height: 100%; object-fit: cover; }
.quad__card { aspect-ratio: 1; background: var(--mint); padding: 26px 26px 26px; display: flex; flex-direction: column; }
.quad__t { margin-top: 16px; font: 700 24px/1.12 var(--head); text-transform: uppercase; color: var(--ink); }
.quad__card .btn { margin-top: auto; align-self: flex-start; }

/* подробно об услугах */
.dets { padding-top: 120px; }
.det { display: grid; grid-template-columns: 1fr 1fr; gap: 16px 48px; border-top: 1px solid var(--line); padding: 30px 0 90px; } 
.det__txt .h2 { margin-top: 16px; font-size: 42px; }
.det__txt p { margin-top: 30px; max-width: 560px; }
.det__line { font: 700 17px/1.3 var(--head) !important; text-transform: uppercase; color: var(--ink); }
.det__txt .btn { margin-top: 30px; }
.det__img { overflow: hidden; aspect-ratio: 4 / 3; background: #e9ecea; }
.det__img img { width: 100%; height: 112%; object-fit: cover; }

/* подбор вентиляции — живая деталь */
.calc { padding-top: 120px; }
.calc__intro { margin-top: 26px; max-width: 640px; }
.calc__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 56px; align-items: start; }
.calc__form { display: grid; gap: 30px; padding-right: 32px; }
.fs { border: 0; padding: 0; margin: 0; min-width: 0; }
.fs legend, .rng label { display: flex; justify-content: space-between; width: 100%; font: 700 13px/1 var(--body); text-transform: uppercase; color: var(--green-t); padding: 0; margin-bottom: 14px; }
.chips { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; }
.chips--3 { grid-template-columns: repeat(3, 1fr); }
.chip { position: relative; display: block; cursor: pointer; }
.chip input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.chip span { display: flex; align-items: center; min-height: 52px; padding: 10px 16px; border: 1px solid var(--line); font-size: 15px; line-height: 1.2; color: var(--ink); background: #fff; transition: background .2s, border-color .2s, color .2s; } 
.chip:hover span { border-color: var(--green); }
.chip input:checked + span { background: var(--green-b); border-color: var(--green-b); color: #fff; font-weight: 600; }
.chip input:focus-visible + span { outline: 3px solid var(--green); outline-offset: 2px; }
.rng output { font: 700 22px/1 var(--head); color: var(--ink); text-transform: none; }
.rng label { align-items: flex-end; }
.rng input[type=range] { -webkit-appearance: none; appearance: none; width: 100%; height: 36px; background: transparent; cursor: pointer; margin: 0; }
.rng input[type=range]::-webkit-slider-runnable-track { height: 4px; background: linear-gradient(var(--green), var(--green)) 0 / var(--p, 30%) 100% no-repeat, #dfe3e1; } /* taste-skill-ignore: заливка дорожки ползунка */
.rng input[type=range]::-moz-range-track { height: 4px; background: #dfe3e1; }
.rng input[type=range]::-moz-range-progress { height: 4px; background: var(--green); }
.rng input[type=range]::-webkit-slider-thumb { -webkit-appearance: none; width: 28px; height: 28px; margin-top: -12px; background: var(--ink); border: 4px solid #fff; outline: 1px solid var(--ink); }
.rng input[type=range]::-moz-range-thumb { width: 22px; height: 22px; border-radius: 0; background: var(--ink); border: 4px solid #fff; }
.res { background: var(--mint); padding: 32px; }
.res__top { display: flex; justify-content: space-between; gap: 16px; align-items: flex-start; }
.res__big { margin-top: 14px; font: 700 clamp(56px, 6vw, 92px)/1 var(--head); color: var(--ink); letter-spacing: -.02em; white-space: nowrap; }
.res__big span { font-size: .38em; letter-spacing: 0; }
.res__sub { margin-top: 12px; font-size: 15px; color: var(--muted); }
.duct-w { flex: none; width: 190px; }
.duct { width: 190px; height: 190px; }
.duct-w figcaption { margin-top: 6px; font-size: 13px; line-height: 1.3; color: var(--muted); text-align: center; }
.duct__frame { fill: none; stroke: var(--mint-d); stroke-width: 2; }
.duct__rect { fill: #fff; stroke: var(--ink); stroke-width: 2; transition: x .45s, y .45s, width .45s, height .45s; }
.duct__circ { fill: var(--green); fill-opacity: .25; stroke: var(--green-d); stroke-width: 3; transition: r .45s cubic-bezier(.2, .7, .2, 1); }
.res__list { margin: 26px 0 26px; }
.res__list > div { border-top: 1px solid var(--mint-d); padding: 14px 0; display: grid; grid-template-columns: 170px 1fr; gap: 12px; } 
.res__list dt { font: 700 13px/1.4 var(--body); text-transform: uppercase; color: var(--green-t); padding-top: 3px; }
.res__list dd { color: var(--ink); font-weight: 500; }
.res__list dd s { color: var(--muted); font-weight: 400; margin-right: 6px; }
.res.is-pulse .res__big b { color: var(--green-d); }

/* распродажа */
.sale__note { max-width: 360px; font-size: 15px; color: var(--muted); }
.sale__list { margin-top: 48px; }
.sale__row { display: grid; grid-template-columns: 2fr 1fr auto; gap: 16px 32px; align-items: center; border-top: 1px solid var(--line); padding: 24px 0; } 
.sale__row:last-child { border-bottom: 1px solid var(--line); } 
.sale__name h3 { font: 700 22px/1.15 var(--head); text-transform: uppercase; color: var(--ink); }
.sale__name p { margin-top: 8px; font-size: 15px; max-width: 640px; }
.sale__price { display: flex; align-items: baseline; gap: 14px; flex-wrap: wrap; }
.sale__price s { color: var(--muted); font-size: 15px; }
.sale__price b { font: 700 30px/1 var(--head); color: var(--ink); white-space: nowrap; }
.sale__price .sale__req { font-size: 22px; text-transform: uppercase; }

/* письма */
.arrs { display: flex; gap: 8px; }
.arr { width: 52px; height: 52px; display: grid; place-items: center; background: var(--green); color: #fff; border: 0; cursor: pointer; transition: background .2s; }
.arr:hover { background: var(--green-d); }
.arr[data-dir="-1"] svg { transform: rotate(180deg); }
.lets__intro { margin-top: 28px; max-width: 720px; }
.lets__track { display: flex; gap: 16px; overflow-x: auto; scroll-snap-type: x mandatory; scroll-padding-left: var(--gut); padding: 48px var(--gut) 18px; max-width: 1440px; margin: 0 auto; scrollbar-width: thin; scrollbar-color: var(--green) var(--mint); }
.let { flex: 0 0 420px; scroll-snap-align: start; background: var(--mint); padding: 28px; display: grid; grid-template-columns: 130px 1fr; gap: 24px; align-items: start; }
.let__img { width: 130px; height: auto; aspect-ratio: 200 / 290; object-fit: cover; background: #fff; }
.let__txt h3 { font: 700 22px/1.15 var(--head); text-transform: uppercase; color: var(--ink); }
.let__txt span { display: block; margin-top: 10px; font: 700 13px/1.3 var(--body); text-transform: uppercase; color: var(--green-t); }
.lets__note { margin-top: 10px; font-size: 15px; color: var(--muted); }
.clients { margin-top: 56px; display: grid; grid-template-columns: 1fr 3fr; gap: 16px; }
.clients ul { display: flex; flex-wrap: wrap; gap: 8px; }
.clients li { padding: 10px 14px; background: var(--mint); color: var(--ink); font-size: 15px; }

/* контакты */
.cont { padding-bottom: 120px; }
.cont__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px 16px; }
.cont__l > p, .cont__r > p { margin-top: 24px; max-width: 520px; }
.cont__r { padding-left: 0; }
.cont__big { margin-top: 36px; display: grid; gap: 6px; }
.big { font: 700 clamp(30px, 3vw, 42px)/1.1 var(--head); color: var(--ink); text-decoration: none; letter-spacing: -.005em; width: fit-content; }
.big:hover { color: var(--green-d); }
.big--mail { text-transform: uppercase; word-break: break-all; }
.cont__small { margin-top: 10px; font-size: 15px; color: var(--muted); }
.soc { display: flex; gap: 8px; margin-top: 26px; }
.soc a { width: 48px; height: 48px; display: grid; place-items: center; background: var(--green); color: #fff; transition: background .2s, transform .2s; }
.soc a:hover { background: var(--green-d); transform: translateY(-2px); }
.cont__dl { margin-top: 40px; display: grid; grid-template-columns: 1fr 1fr; gap: 24px 16px; }
.cont__dl dt { font: 700 13px/1.3 var(--body); text-transform: uppercase; color: var(--green-t); }
.cont__dl dd { margin-top: 8px; color: var(--ink); font-size: 16px; }
.oform { margin-top: 36px; display: grid; gap: 14px; }
.fld { display: grid; gap: 6px; }
.fld span { font-size: 13px; color: var(--muted); }
.fld input, .fld select, .fld textarea { width: 100%; min-height: 56px; padding: 14px 18px; border: 1px solid var(--line); border-radius: 0; background: #fff; font-size: 16px; color: var(--ink); } 
.fld textarea { resize: vertical; }
.fld input:focus, .fld select:focus, .fld textarea:focus { outline: 2px solid var(--green); outline-offset: 0; border-color: var(--green); }
.oform .btn { justify-self: start; margin-top: 6px; }
.oerr { color: #b3261e; font-weight: 600; font-size: 15px; }

/* подвал */
.ftr { border-top: 1px solid var(--line); padding-top: 56px; padding-bottom: 32px; } 
.ftr__grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 32px 16px; }
.ftr__grid p { margin-top: 16px; font-size: 16px; max-width: 520px; color: var(--ink); }
.ftr__nav { margin-top: 16px; display: grid; gap: 8px; }
.ftr__nav a { font: 700 13px/1.3 var(--body); text-transform: uppercase; text-decoration: none; color: var(--ink); }
.ftr__nav a:hover { color: var(--green-d); }
.ftr__name { margin-top: 64px; font: 700 clamp(64px, 16vw, 236px)/.86 var(--head); text-transform: uppercase; letter-spacing: -.02em; color: var(--ink); white-space: nowrap; overflow: hidden; }
.ftr__bot { margin-top: 28px; display: flex; gap: 12px 32px; flex-wrap: wrap; font-size: 13px; color: var(--muted); }
.ftr__bot span:first-child { font-weight: 700; color: var(--ink); text-transform: uppercase; }
.ftr__cred { flex: 1; min-width: 280px; }
.ftr__cred a { color: var(--muted); }

/* появления (контент виден и без скрипта) */
.js-anim .rv { opacity: 0; transform: translateY(24px); }

/* ---------- планшет ---------- */
@media (max-width: 1180px) {
  :root { --gut: 32px; --sec: 120px; }
  .hdr__tels a:nth-child(2) { display: none; }
  .hdr__nav { gap: 22px; }
  .h2 { font-size: 40px; }
  .det__txt .h2 { font-size: 36px; }
  .calc__form { padding-right: 0; }
}
@media (max-width: 1000px) {
  .hdr__nav { display: none; position: absolute; top: 72px; left: 0; right: 0; flex-direction: column; gap: 0; padding: 8px var(--gut) 24px; background: #fff; color: var(--ink); box-shadow: 0 16px 30px rgba(0, 0, 0, .14); } /* taste-skill-ignore: тень у выпадающего меню — оно плавает */
  .hdr.is-open { background: #fff; color: var(--ink); }
  .hdr.is-open .hdr__nav { display: flex; }
  .hdr__nav a { padding: 16px 0; font-size: 15px; border-bottom: 1px solid var(--line); } 
  .hdr__nav a::after { display: none; }
  .hdr__navtel { display: block; font-family: var(--head) !important; font-size: 24px !important; border-bottom: 0 !important; }
  .hdr__tels { margin-left: auto; }
  .burger { display: grid; gap: 5px; place-content: center; width: 44px; height: 44px; padding: 0; border: 0; background: transparent; cursor: pointer; }
  .burger span { width: 24px; height: 2px; background: currentColor; transition: transform .25s, opacity .25s; }
  .hdr.is-open .burger span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .hdr.is-open .burger span:nth-child(2) { opacity: 0; }
  .hdr.is-open .burger span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .hero__grid { grid-template-columns: 1fr; padding-top: 150px; }
  .hero__tags { order: 2; padding-top: 0; margin-top: 8px; }
  .g4, .clients { grid-template-columns: 1fr; }
  .g4 > .lbl { padding-top: 0; }
  .g4 .h2, .g4__main .h2 { margin-top: 0; }
  .tiles { grid-template-columns: repeat(2, 1fr); }
  .prin__grid { grid-template-columns: 1fr 1fr; }
  .nums__grid { grid-template-columns: repeat(2, 1fr); margin-top: 48px; }
  .num--1, .num--2, .num--3, .num--4, .num--5 { grid-column: auto; grid-row: auto; }
  .srow__head { grid-template-columns: 90px 1fr auto; }
  .srow__body { grid-template-columns: 90px 1fr; }
  .srow__body .btn { grid-column: 2; justify-self: start; }
  .quad__grid { grid-template-columns: repeat(2, 1fr); }
  .det { grid-template-columns: 1fr; padding-bottom: 70px; }
  .det__img { order: 2; margin-top: 16px; }
  .calc__grid { grid-template-columns: 1fr; }
  .cont__grid { grid-template-columns: 1fr; }
  .ftr__grid { grid-template-columns: 1fr 1fr; }
  .ftr__grid > div:first-child { grid-column: 1 / -1; }
}
/* ---------- телефон ---------- */
@media (max-width: 640px) {
  :root { --gut: 16px; --sec: 88px; }
  body { font-size: 16px; }
  .hdr__bar { height: 64px; gap: 10px; }
  .hdr__nav { top: 64px; }
  .logo__mark { width: 34px; height: 30px; }
  .logo__w { font-size: 19px; }
  .hdr__tels, .hdr__cta { display: none; }
  .hdr__wa { display: grid; place-items: center; width: 44px; height: 44px; margin-left: auto; background: var(--green); color: #fff; }
  .hero { min-height: auto; }
  .hero__grid { padding-top: 116px; padding-bottom: 72px; }
  .hero__h { font-size: 38px; line-height: 1.04; }
  .hero__lead { font-size: 16px; margin-top: 20px; }
  .hero__act { margin-top: 28px; }
  .h2 { font-size: 30px; }
  .h2 + p, .h2 + .about__p { margin-top: 24px; }
  .sec__head { flex-direction: column; align-items: flex-start; gap: 22px; }
  .tiles { gap: 16px 10px; margin-top: 40px; }
  .tile figcaption b { font-size: 18px; }
  .tile figcaption span { font-size: 13px; }
  .prin__grid { grid-template-columns: 1fr; margin-top: 36px; }
  .pr { padding: 20px 0 32px; }
  .pr__t { font-size: 22px; }
  .help { padding: 24px 20px; margin-top: 8px; }
  .nums__in { padding-top: 96px; padding-bottom: 96px; }
  .nums__grid { row-gap: 36px; }
  .num__v { font-size: 50px; }
  .num p { font-size: 15px; }
  .srows { margin-top: 36px; }
  .srow__head { grid-template-columns: 1fr auto; gap: 10px 14px; padding: 20px 0 22px; }
  .srow__n { grid-column: 1 / -1; padding-top: 0; }
  .srow__t { font-size: 19px; }
  .srow__more { font-size: 0; gap: 0; padding-top: 0; }
  .srow__more i { width: 30px; height: 30px; }
  .srow__body { grid-template-columns: 1fr; }
  .srow__body p, .srow__body .btn { grid-column: 1; }
  .quad { padding-top: 80px; }
  .quad__grid { gap: 10px; }
  .quad__card { grid-column: 1 / -1; aspect-ratio: auto; padding: 24px 20px; }
  .quad__card .btn { margin-top: 22px; }
  .quad__t { font-size: 22px; }
  .dets { padding-top: 80px; }
  .det { padding-bottom: 56px; }
  .det__txt .h2 { font-size: 28px; }
  .det__txt p { margin-top: 20px; }
  .calc { padding-top: 88px; }
  .calc__grid { margin-top: 36px; }
  .chips { grid-template-columns: 1fr 1fr; }
  .chips--3 { grid-template-columns: 1fr; }
  .chip span { min-height: 48px; font-size: 15px; padding: 8px 12px; }
  .res { padding: 24px 18px; }
  .res__top { gap: 10px; }
  .duct-w { width: 104px; }
  .duct { width: 104px; height: 104px; }
  .res__big { font-size: 48px; }
  .res__list > div { grid-template-columns: 1fr; gap: 4px; }
  .sale__row { grid-template-columns: 1fr; gap: 14px; padding: 22px 0; }
  .sale__name h3 { font-size: 19px; }
  .sale__price b { font-size: 26px; }
  .sale__row .btn { justify-self: start; }
  .let { flex-basis: 86%; grid-template-columns: 96px 1fr; padding: 20px; gap: 16px; }
  .let__img { width: 96px; }
  .let__txt h3 { font-size: 18px; }
  .lets__track { padding-top: 32px; }
  .clients { margin-top: 40px; }
  .clients li { font-size: 15px; padding: 8px 12px; }
  .cont { padding-bottom: 80px; }
  .cont__dl { grid-template-columns: 1fr; }
  .big { font-size: 30px; }
  .big--mail { font-size: 24px; }
  .ftr__grid { grid-template-columns: 1fr; }
  .ftr__name { margin-top: 40px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
  .js-anim .rv { opacity: 1; transform: none; }
}