/* КлинЭксперт — лендинг. Лёгкий, адаптивный, с анимациями. */
:root{
  --navy:#0a1f3c;
  --navy-2:#0e2a4f;
  --ink:#14233b;
  --muted:#5b6b82;
  --line:#e6ecf3;
  --bg:#f5f8fc;
  --card:#ffffff;
  --teal:#0fb9b1;
  --cyan:#22b8e6;
  --blue:#3b82f6;
  --amber:#f7a821;
  --grad:linear-gradient(100deg,#0fb9b1,#22b8e6 55%,#3b82f6);
  --grad-volt:linear-gradient(120deg,#f7a821,#f76b1c);
  --radius:18px;
  --shadow:0 18px 40px -18px rgba(14,42,79,.28);
  --shadow-sm:0 8px 24px -12px rgba(14,42,79,.25);
  --wrap:1160px;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;font-family:'Manrope',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.6;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
h1,h2,h3,h4{margin:0;line-height:1.15;font-weight:800;letter-spacing:-.02em}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 20px}
.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.muted{color:var(--muted);font-weight:500}

/* ---------- buttons ---------- */
.btn{
  --b:var(--grad);
  display:inline-flex;align-items:center;justify-content:center;gap:.5em;
  padding:12px 22px;border-radius:999px;font-weight:700;font-size:15px;cursor:pointer;
  border:0;background:var(--b);color:#fff;box-shadow:0 10px 24px -10px rgba(34,184,230,.7);
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),opacity .2s;
  position:relative;white-space:nowrap;
}
.btn:hover{transform:translateY(-2px);box-shadow:0 16px 30px -10px rgba(34,184,230,.75)}
.btn:active{transform:translateY(0)}
.btn--lg{padding:15px 30px;font-size:16px}
.btn--sm{padding:9px 16px;font-size:14px}
.btn--full{width:100%}
.btn--ghost{background:transparent;color:var(--navy);border:1.5px solid var(--line);box-shadow:none}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan);box-shadow:none}
:root .btn:disabled{opacity:.6;cursor:default;transform:none}

/* ---------- header ---------- */
.hdr{position:fixed;top:0;left:0;right:0;z-index:50;transition:.3s var(--ease)}
.hdr__in{display:flex;align-items:center;gap:22px;height:70px}
.hdr.scrolled{background:rgba(255,255,255,.85);backdrop-filter:blur(14px);box-shadow:0 1px 0 var(--line)}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;color:var(--navy);letter-spacing:-.02em}
.brand__logo{display:inline-flex;width:38px;height:38px;align-items:center;justify-content:center;border-radius:11px;background:var(--grad);color:#fff;flex:none;overflow:hidden}
.brand__logo img{width:100%;height:100%;object-fit:cover}
.hdr .brand{color:#fff}
.hdr.scrolled .brand{color:var(--navy)}
.nav{display:flex;gap:26px;margin-left:auto;font-weight:600;font-size:15px}
.nav a{color:rgba(255,255,255,.85);transition:color .2s;position:relative}
.nav a:hover{color:#fff}
.hdr.scrolled .nav a{color:var(--muted)}
.hdr.scrolled .nav a:hover{color:var(--navy)}
.hdr__cta{display:flex;align-items:center;gap:16px}
.hdr__phone{font-weight:700;font-size:15px;color:#fff}
.hdr.scrolled .hdr__phone{color:var(--navy)}
.burger{display:none;width:44px;height:44px;border:0;background:transparent;flex-direction:column;gap:5px;justify-content:center;align-items:center;cursor:pointer;margin-left:auto}
.burger span{width:24px;height:2px;background:#fff;border-radius:2px;transition:.3s var(--ease)}
.hdr.scrolled .burger span{background:var(--navy)}
.burger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger.open span:nth-child(2){opacity:0}
.burger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- hero ---------- */
.hero{position:relative;padding:120px 0 90px;color:#fff;overflow:hidden;
  background:radial-gradient(120% 120% at 80% -10%,#12356a 0%,var(--navy) 45%,#081936 100%)}
.hero__bg{position:absolute;inset:0;z-index:0;overflow:hidden}
.blob{position:absolute;border-radius:50%;filter:blur(60px);opacity:.55;animation:float 14s var(--ease) infinite}
.blob--1{width:420px;height:420px;background:#0fb9b1;top:-120px;right:-80px}
.blob--2{width:360px;height:360px;background:#3b82f6;bottom:-140px;left:-100px;animation-delay:-4s}
.blob--3{width:280px;height:280px;background:#22b8e6;top:40%;left:45%;animation-delay:-8s;opacity:.35}
.grid{position:absolute;inset:0;opacity:.5;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:44px 44px;mask-image:radial-gradient(70% 70% at 50% 30%,#000,transparent)}
.hero__in{position:relative;z-index:1;display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center}
.chip{display:inline-flex;align-items:center;gap:8px;padding:7px 15px;border-radius:999px;font-size:13.5px;font-weight:600;
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.15);color:#d6e6ff;margin-bottom:22px}
.chip::first-letter{color:#38e0a5}
.hero h1{font-size:clamp(34px,5.2vw,58px);margin-bottom:18px}
.hero__sub{font-size:clamp(16px,1.7vw,19px);color:#c3d3e8;max-width:540px;margin-bottom:30px}
.hero__sub b{color:#fff}
.hero__btns{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:38px}
.hero .btn--ghost{color:#fff;border-color:rgba(255,255,255,.3)}
.hero .btn--ghost:hover{border-color:#fff;color:#fff;background:rgba(255,255,255,.08)}
.hero__badges{display:flex;gap:30px;flex-wrap:wrap}
.hb{display:flex;flex-direction:column}
.hb b{font-size:24px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hb span{font-size:13px;color:#9db2cc}

/* hero art */
.hero__art{position:relative;height:360px;display:flex;align-items:center;justify-content:center}
.hero__ring{position:absolute;width:300px;height:300px;border-radius:50%;
  border:1.5px dashed rgba(255,255,255,.18);animation:spin 24s linear infinite}
.hero__ring::before{content:"";position:absolute;inset:34px;border-radius:50%;border:1.5px solid rgba(56,224,165,.25)}
.hero__spark{position:absolute;width:230px;height:230px;border-radius:50%;
  background:radial-gradient(circle at 50% 50%,rgba(34,184,230,.4),transparent 65%);filter:blur(6px);animation:pulse 5s ease-in-out infinite}
.card-float{position:absolute;display:flex;align-items:center;gap:12px;padding:14px 18px;border-radius:16px;
  background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.18);backdrop-filter:blur(12px);
  box-shadow:0 16px 40px -18px rgba(0,0,0,.5);animation:float 8s var(--ease) infinite}
.card-float b{display:block;font-size:15px}
.card-float span{font-size:12.5px;color:#b9cbe4}
.card-float--a{top:24px;left:-6px}
.card-float--b{bottom:30px;right:-6px;animation-delay:-3s}
.cf__ic{width:42px;height:42px;border-radius:12px;display:flex;align-items:center;justify-content:center;color:#fff;flex:none}
.cf__ic--clean{background:var(--grad)}
.cf__ic--volt{background:var(--grad-volt)}
.scroll-hint{position:absolute;left:50%;bottom:24px;transform:translateX(-50%);width:26px;height:42px;border:2px solid rgba(255,255,255,.4);border-radius:14px;z-index:1}
.scroll-hint span{position:absolute;left:50%;top:8px;width:4px;height:8px;background:#fff;border-radius:2px;transform:translateX(-50%);animation:scroll 1.8s infinite}

/* ---------- trust bar ---------- */
.trust{margin-top:-40px;position:relative;z-index:2}
.trust__in{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;background:var(--card);border-radius:var(--radius);
  padding:26px 20px;box-shadow:var(--shadow);border:1px solid var(--line)}
.stat{text-align:center}
.stat b{display:block;font-size:clamp(26px,3.4vw,38px);font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat span{font-size:13.5px;color:var(--muted);font-weight:500}

/* ---------- sections ---------- */
.sec{padding:84px 0}
.sec--tint{background:linear-gradient(180deg,#eef4fb,#f5f8fc)}
.sec__head{max-width:640px;margin:0 auto 46px;text-align:center}
.sec__kicker{display:inline-block;font-size:13px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;
  color:var(--cyan);margin-bottom:12px}
.sec__head h2{font-size:clamp(26px,3.6vw,40px);margin-bottom:14px}
.sec__head p{color:var(--muted);font-size:16.5px}

/* services */
.serv{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.serv__card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:34px 30px;
  box-shadow:var(--shadow-sm);transition:transform .3s var(--ease),box-shadow .3s var(--ease);position:relative;overflow:hidden}
.serv__card::after{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:var(--grad);opacity:.85}
.serv__card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.serv__ic{width:60px;height:60px;border-radius:16px;display:flex;align-items:center;justify-content:center;color:#fff;margin-bottom:20px}
.serv__ic--clean{background:var(--grad)}
.serv__ic--volt{background:var(--grad-volt)}
.serv__card h3{font-size:22px;margin-bottom:8px}
.serv__card>p{color:var(--muted);margin-bottom:18px}
.serv__list li{position:relative;padding:7px 0 7px 28px;border-bottom:1px dashed var(--line);font-size:15px;font-weight:500}
.serv__list li:last-child{border-bottom:0}
.serv__list li::before{content:"";position:absolute;left:0;top:14px;width:16px;height:16px;border-radius:5px;background:var(--grad);
  -webkit-mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='%23000' d='M9 16.2 4.8 12l-1.4 1.4L9 19 21 7l-1.4-1.4z'/%3E%3C/svg%3E") center/14px no-repeat;
  mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='%23000' d='M9 16.2 4.8 12l-1.4 1.4L9 19 21 7l-1.4-1.4z'/%3E%3C/svg%3E") center/14px no-repeat}
.serv__link{display:inline-block;margin-top:20px;font-weight:700;color:var(--cyan);transition:gap .2s,transform .2s}
.serv__link:hover{transform:translateX(4px)}

/* why grid */
.why{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.why__item{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:28px 26px;
  transition:transform .3s var(--ease),box-shadow .3s var(--ease)}
.why__item:hover{transform:translateY(-4px);box-shadow:var(--shadow-sm)}
.why__ic{width:50px;height:50px;border-radius:14px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,#e6fbf8,#e2f1ff);color:var(--teal);margin-bottom:16px}
.why__item h3{font-size:18px;margin-bottom:8px}
.why__item p{color:var(--muted);font-size:15px}

/* steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;counter-reset:s}
.step{position:relative;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:30px 24px 26px}
.step__n{position:absolute;top:-18px;left:24px;width:44px;height:44px;border-radius:12px;background:var(--grad);color:#fff;
  display:flex;align-items:center;justify-content:center;font-weight:800;font-size:19px;box-shadow:var(--shadow-sm)}
.step h3{font-size:18px;margin:14px 0 8px}
.step p{color:var(--muted);font-size:14.5px}
.steps .step:not(:last-child)::after{content:"";position:absolute;top:6px;right:-14px;width:28px;height:2px;background:var(--line);z-index:1}

/* ---------- lead ---------- */
.sec--lead{background:radial-gradient(120% 120% at 10% 0%,#0e2a4f,#081936);color:#fff}
.lead{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center}
.lead__info .sec__kicker{color:#38e0a5}
.lead__info h2{font-size:clamp(26px,3.4vw,38px);margin-bottom:14px}
.lead__info>p{color:#bcd0ea;margin-bottom:24px;max-width:460px}
.lead__pts li{display:flex;align-items:center;gap:12px;padding:8px 0;font-weight:600;color:#e4eefb}
.lead__pts svg{color:#38e0a5;flex:none}
.lead__contacts{margin-top:26px;display:flex;flex-direction:column;gap:4px}
.lead__phone{font-size:26px;font-weight:800}
.lead__hours{color:#9db2cc;font-size:14px}
.lead__form{background:var(--card);border-radius:22px;padding:30px;display:grid;grid-template-columns:1fr 1fr;gap:16px;
  box-shadow:0 30px 60px -24px rgba(0,0,0,.5);color:var(--ink);position:relative}
.field{display:flex;flex-direction:column;gap:6px}
.field--full{grid-column:1/-1}
.field label{font-size:13.5px;font-weight:700;color:var(--navy)}
.field input,.field select,.field textarea{
  font:inherit;padding:12px 14px;border:1.5px solid var(--line);border-radius:12px;background:#fbfdff;
  transition:border-color .2s,box-shadow .2s;width:100%;color:var(--ink)}
.field textarea{resize:vertical;min-height:64px}
.field input:focus,.field select:focus,.field textarea:focus{outline:0;border-color:var(--cyan);box-shadow:0 0 0 4px rgba(34,184,230,.14)}
.field input.err,.field select.err{border-color:#e5484d;box-shadow:0 0 0 4px rgba(229,72,77,.12)}
.hp{position:absolute;left:-9999px;width:1px;height:1px;opacity:0}
.lead__policy{grid-column:1/-1;font-size:12.5px;color:var(--muted);margin-top:-2px;text-align:center}
.lead__policy a{color:var(--cyan);font-weight:600}
.lead__ok{position:absolute;inset:0;background:var(--card);border-radius:22px;display:flex;flex-direction:column;
  align-items:center;justify-content:center;gap:8px;text-align:center;padding:30px;color:var(--teal);
  animation:pop .4s var(--ease)}
.lead__ok[hidden]{display:none}
.lead__ok b{font-size:22px;color:var(--ink)}
.lead__ok span{color:var(--muted);font-weight:500;max-width:260px}

/* ---------- footer ---------- */
.foot{background:var(--navy);color:#c3d3e8;padding:56px 0 26px}
.foot__in{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:32px;padding-bottom:32px}
.brand--foot{color:#fff;margin-bottom:14px}
.foot__desc{font-size:14px;color:#9db2cc;max-width:280px}
.foot__col h4{font-size:15px;color:#fff;margin-bottom:16px}
.foot__col a,.foot__col span{display:block;font-size:14px;color:#9db2cc;padding:4px 0;transition:color .2s}
.foot__col a:hover{color:#fff}
.foot__bottom{display:flex;justify-content:space-between;align-items:center;gap:14px;
  border-top:1px solid rgba(255,255,255,.1);padding-top:22px;font-size:13px;color:#7f95b3;flex-wrap:wrap}
.foot__bottom a:hover{color:#fff}

/* ---------- fab (mobile) ---------- */
.fab{position:fixed;right:18px;bottom:18px;z-index:40;width:56px;height:56px;border-radius:50%;background:var(--grad);
  color:#fff;display:none;align-items:center;justify-content:center;box-shadow:0 12px 30px -8px rgba(34,184,230,.7);
  animation:fabpulse 2.4s ease-in-out infinite}

/* ---------- reveal animation ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ---------- keyframes ---------- */
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-18px)}}
@keyframes spin{to{transform:rotate(360deg)}}
@keyframes pulse{0%,100%{transform:scale(.92);opacity:.8}50%{transform:scale(1.05);opacity:1}}
@keyframes scroll{0%{opacity:0;top:8px}30%{opacity:1}60%{opacity:1;top:22px}100%{opacity:0;top:22px}}
@keyframes pop{0%{transform:scale(.9);opacity:0}100%{transform:scale(1);opacity:1}}
@keyframes fabpulse{0%,100%{box-shadow:0 12px 30px -8px rgba(34,184,230,.7)}50%{box-shadow:0 12px 40px -6px rgba(34,184,230,.95)}}

/* ---------- responsive ---------- */
@media(max-width:960px){
  .hero__in{grid-template-columns:1fr;gap:20px}
  .hero__art{height:300px;order:-1;margin-bottom:6px}
  .lead{grid-template-columns:1fr;gap:28px}
  .why{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr);gap:34px 22px}
  .steps .step:not(:last-child)::after{display:none}
  .foot__in{grid-template-columns:1fr 1fr}
}
@media(max-width:720px){
  .nav,.hdr__cta{display:none}
  .burger{display:flex}
  .nav.open{display:flex;position:absolute;top:70px;left:0;right:0;flex-direction:column;gap:0;
    background:#fff;padding:8px 20px 16px;box-shadow:var(--shadow);border-top:1px solid var(--line)}
  .nav.open a{color:var(--navy);padding:13px 0;border-bottom:1px solid var(--line);font-size:16px}
  .fab{display:flex}
  .trust__in{grid-template-columns:1fr 1fr;gap:22px 12px}
  .serv{grid-template-columns:1fr}
  .lead__form{grid-template-columns:1fr;padding:24px}
  .hero{padding:100px 0 70px}
  .sec{padding:64px 0}
}
@media(max-width:460px){
  .why{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .foot__in{grid-template-columns:1fr}
  .hero__badges{gap:20px}
  .card-float{padding:11px 14px}
}

@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important;scroll-behavior:auto!important}
  .reveal{opacity:1;transform:none}
}