:root{
    --ink:#0F172A; --ink-soft:#334155; --muted:#64748B;
    --bg:#FFFFFF; --bg-alt:#F8FAFC; --line:#E2E8F0;
    --brand:#0EA5A4; --accent:#16A34A; --accent-d:#15803D; --navy:#0B1220;
    --radius:16px; --maxw:1140px; --shadow:0 10px 30px -12px rgba(2,12,27,.18);
  }
  *{box-sizing:border-box;margin:0;padding:0}
  html{scroll-behavior:smooth}
  body{font-family:"Nunito Sans",system-ui,sans-serif;color:var(--ink);background:var(--bg);line-height:1.65;-webkit-font-smoothing:antialiased}
  h1,h2,h3{font-family:"Rubik",system-ui,sans-serif;line-height:1.12;letter-spacing:-.01em}
  .wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}
  section{padding:84px 0}
  a{color:inherit;text-decoration:none}
  img{max-width:100%;display:block}

  header.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.86);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
  .nav .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
  .logo{font-family:"Rubik";font-weight:700;font-size:17px;letter-spacing:-.02em}
  .logo b{color:var(--brand)}
  .nav nav{display:flex;gap:24px;align-items:center}
  .nav nav a{color:var(--ink-soft);font-weight:600;font-size:15px;transition:color .2s}
  .nav nav a:hover{color:var(--brand)}
  @media(max-width:900px){.nav nav a:not(.btn){display:none}}

  .btn{display:inline-flex;align-items:center;gap:9px;background:var(--accent);color:#fff;font-weight:700;
    font-family:"Rubik";padding:13px 22px;border-radius:12px;cursor:pointer;border:0;font-size:15px;
    transition:transform .15s ease,background .2s ease,box-shadow .2s;box-shadow:0 8px 20px -8px rgba(22,163,74,.6)}
  .btn:hover{background:var(--accent-d);transform:translateY(-2px)}
  .btn:focus-visible{outline:3px solid #86efac;outline-offset:2px}
  .btn.ghost{background:transparent;color:var(--ink);border:2px solid var(--line);box-shadow:none}
  .btn.ghost:hover{border-color:var(--brand);color:var(--brand)}

  /* hero banner */
  @keyframes kenburns{from{transform:scale(1)}to{transform:scale(1.09)}}
  @keyframes heroIn{from{opacity:0;transform:translateY(22px)}to{opacity:1;transform:none}}
  .hero{position:relative;overflow:hidden;min-height:540px;display:flex;align-items:center;padding:72px 0}
  .hero-bg{position:absolute;inset:0;z-index:0;background:url('photo/banner.png') center right/cover no-repeat;
    animation:kenburns 24s ease-in-out infinite alternate;will-change:transform}
  .hero-overlay{position:absolute;inset:0;z-index:1;
    background:linear-gradient(90deg,rgba(248,250,252,.98) 0%,rgba(248,250,252,.93) 30%,rgba(248,250,252,.55) 50%,rgba(248,250,252,0) 74%)}
  .hero-inner{position:relative;z-index:2;max-width:620px;animation:heroIn .9s cubic-bezier(.16,1,.3,1) both}
  .pill{display:inline-flex;align-items:center;gap:8px;background:#ECFEFF;color:#0E7490;border:1px solid #A5F3FC;
    padding:7px 14px;border-radius:999px;font-weight:700;font-size:13px;margin-bottom:20px}
  .hero h1{font-size:clamp(30px,4.6vw,50px);font-weight:800;text-shadow:0 1px 2px rgba(255,255,255,.9)}
  .hero h1 .hl{color:var(--brand)}
  .hero p.sub{font-size:clamp(17px,2.2vw,20px);color:var(--ink-soft);margin:20px 0 28px;max-width:540px;text-shadow:0 1px 2px rgba(255,255,255,.95)}
  .cta-row{display:flex;gap:14px;flex-wrap:wrap;align-items:center}
  .note{font-size:14px;color:var(--muted);margin-top:14px}
  .hero-badge{position:absolute;z-index:2;right:26px;bottom:26px;background:#fff;border:1px solid var(--line);
    border-radius:14px;padding:12px 16px;box-shadow:var(--shadow);animation:heroIn 1.1s cubic-bezier(.16,1,.3,1) both}
  .hero-badge b{font-family:"Rubik";font-size:22px;color:var(--accent);display:block;line-height:1}
  .hero-badge span{font-size:12px;color:var(--muted)}
  @media(max-width:760px){.hero{min-height:auto;padding:46px 0}
    .hero-overlay{background:linear-gradient(180deg,rgba(248,250,252,.6) 0%,rgba(248,250,252,.94) 64%)}
    .hero-badge{display:none}}
  @media(prefers-reduced-motion:reduce){.hero-bg,.stats::before{animation:none}.hero-inner,.hero-badge{animation:none}}

  .stats{position:relative;background:var(--navy);color:#fff;overflow:hidden}
  .stats::before{content:"";position:absolute;inset:0;background:url('photo/city.jpg') center/cover no-repeat;opacity:.32;z-index:0;animation:kenburns 28s ease-in-out infinite alternate;will-change:transform}
  .stats::after{content:"";position:absolute;inset:0;background:linear-gradient(0deg,rgba(11,18,32,.84),rgba(11,18,32,.64));z-index:1}
  .stats .wrap{position:relative;z-index:2;display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center}
  @media(max-width:760px){.stats .wrap{grid-template-columns:1fr 1fr;gap:30px 20px}}
  .stat b{font-family:"Rubik";font-size:clamp(26px,4vw,38px);font-weight:800;color:#4ADE80;display:block}
  .stat span{color:#94A3B8;font-size:14px;font-weight:600}

  .head{max-width:700px;margin:0 auto 50px;text-align:center}
  .head .k{color:var(--brand);font-weight:800;font-size:14px;letter-spacing:.12em;text-transform:uppercase}
  .head h2{font-size:clamp(26px,4vw,38px);font-weight:700;margin:12px 0}
  .head p{color:var(--ink-soft);font-size:18px}

  /* platforms */
  .plat{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
  @media(max-width:880px){.plat{grid-template-columns:1fr}}
  .pcard{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;
    transition:transform .2s,box-shadow .2s,border-color .2s;overflow:hidden}
  .pcard:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#CBD5E1}
  .pcard .tag{display:inline-block;font-family:"Rubik";font-weight:700;font-size:13px;padding:5px 11px;border-radius:8px;margin-bottom:14px}
  .pcard.av .tag{background:#FEF3E2;color:#C2410C}
  .pcard.tg .tag{background:#E0F2FE;color:#0369A1}
  .pcard.vk .tag{background:#EEF2FF;color:#4338CA}
  .phead{display:flex;align-items:center;gap:12px;margin-bottom:16px}
  .plogo{width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;background:#fff;border:1px solid var(--line);flex:0 0 44px}
  .plogo svg{width:30px;height:30px}
  .plogo .av-a{font-family:"Rubik";font-weight:800;font-size:22px;color:#00AAFF}
  .pname{font-family:"Rubik";font-weight:700;font-size:16px;color:var(--ink)}
  .pcard h3{font-size:21px;font-weight:600;margin-bottom:10px}
  .pcard p{color:var(--ink-soft);font-size:15.5px;margin-bottom:14px}
  .pcard ul{list-style:none;font-size:14.5px;color:var(--ink-soft)}
  .pcard li{padding-left:24px;position:relative;margin-bottom:7px}
  .pcard li::before{content:"";position:absolute;left:0;top:7px;width:14px;height:8px;border-left:2.5px solid var(--accent);border-bottom:2.5px solid var(--accent);transform:rotate(-45deg)}

  /* generic cards */
  .grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
  @media(max-width:880px){.grid3{grid-template-columns:1fr}}
  .card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;transition:transform .2s,box-shadow .2s,border-color .2s}
  .card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#CBD5E1}
  .ico{width:50px;height:50px;border-radius:13px;display:grid;place-items:center;background:#E6FBFA;color:var(--brand);margin-bottom:16px}
  .ico svg{width:26px;height:26px}
  .card h3{font-size:20px;font-weight:600;margin-bottom:8px}
  .card p{color:var(--ink-soft);font-size:16px}

  .alt{background:var(--bg-alt)}
  /* секции-полосы с фоновой обложкой */
  .imgband{position:relative;overflow:hidden;color:#fff}
  .imgband::before{content:"";position:absolute;inset:0;z-index:0;background-position:center;background-size:cover;background-repeat:no-repeat;animation:kenburns 30s ease-in-out infinite alternate;will-change:transform}
  .imgband::after{content:"";position:absolute;inset:0;z-index:1;background:linear-gradient(0deg,rgba(11,18,32,.93),rgba(11,18,32,.8))}
  .imgband .wrap{position:relative;z-index:2}
  .imgband .head h2{color:#fff}.imgband .head p{color:#CBD5E1}.imgband .head .k{color:#7DD3FC}
  .band-why::before{background-image:url('photo/desk.jpg')}
  .band-aud::before{background-image:url('photo/citylights.jpg')}
  .imgband .why,.imgband .card{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.16);backdrop-filter:blur(3px)}
  .imgband .why:hover,.imgband .card:hover{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.28);box-shadow:none}
  .imgband .why h3,.imgband .card h3{color:#fff}
  .imgband .why p,.imgband .card p{color:#CBD5E1}

  /* about */
  .about-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:46px;align-items:center}
  @media(max-width:880px){.about-grid{grid-template-columns:1fr;gap:28px}}
  .about-photo{position:relative;background:linear-gradient(160deg,#0EA5A4,#0B1220);border-radius:22px;padding-top:18px;display:flex;justify-content:center;align-items:flex-end;overflow:hidden;min-height:340px}
  .about-photo img{max-height:380px;width:auto;filter:drop-shadow(0 16px 30px rgba(0,0,0,.3))}
  .about-txt h2{font-size:clamp(26px,4vw,36px);font-weight:700;margin-bottom:8px}
  .about-txt .role{color:var(--brand);font-weight:700;font-family:"Rubik";margin-bottom:18px}
  .about-txt p{color:var(--ink-soft);font-size:17px;margin-bottom:16px}
  .about-txt .pts{display:flex;gap:26px;flex-wrap:wrap;margin-top:8px}
  .about-txt .pts div b{font-family:"Rubik";font-size:24px;color:var(--ink);display:block}
  .about-txt .pts div span{font-size:13px;color:var(--muted)}

  /* why */
  .why-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
  @media(max-width:760px){.why-grid{grid-template-columns:1fr}}
  .why{display:flex;gap:16px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px}
  .why .n{flex:0 0 42px;height:42px;border-radius:11px;background:var(--accent);color:#fff;font-family:"Rubik";font-weight:800;display:grid;place-items:center}
  .why h3{font-size:18px;font-weight:600;margin-bottom:5px}
  .why p{color:var(--ink-soft);font-size:15px}

  /* case */
  .case{background:var(--navy);color:#fff}
  .case .head h2{color:#fff}.case .head p{color:#94A3B8}
  .case-box{max-width:920px;margin:0 auto;background:#0e1a30;border:1px solid #1E293B;border-radius:20px;padding:34px}
  .case-top{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;align-items:baseline;border-bottom:1px solid #1E293B;padding-bottom:18px;margin-bottom:24px}
  .case-top h3{font-size:22px}.case-top .bud{color:#4ADE80;font-weight:700;font-family:"Rubik"}
  .case-metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
  @media(max-width:680px){.case-metrics{grid-template-columns:1fr 1fr}}
  .cm b{font-family:"Rubik";font-size:clamp(24px,4vw,34px);font-weight:800;color:#fff;display:block}
  .cm span{color:#94A3B8;font-size:13px}
  .case-foot{margin-top:24px;padding-top:20px;border-top:1px solid #1E293B;color:#CBD5E1;font-size:15px}
  .case-foot b{color:#4ADE80}

  .aud{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
  @media(max-width:760px){.aud{grid-template-columns:1fr}}
  .aud .card h3{font-size:18px}

  .faq{max-width:780px;margin:0 auto}
  details{border:1px solid var(--line);border-radius:14px;margin-bottom:14px;background:#fff;overflow:hidden}
  details[open]{border-color:#A5F3FC;box-shadow:var(--shadow)}
  summary{cursor:pointer;list-style:none;padding:20px 24px;font-family:"Rubik";font-weight:600;font-size:18px;display:flex;justify-content:space-between;align-items:center;gap:16px}
  summary::-webkit-details-marker{display:none}
  summary .pl{flex:0 0 22px;height:22px;position:relative}
  summary .pl::before,summary .pl::after{content:"";position:absolute;background:var(--brand);border-radius:2px}
  summary .pl::before{top:10px;left:0;width:22px;height:2px}
  summary .pl::after{left:10px;top:0;width:2px;height:22px;transition:transform .25s}
  details[open] summary .pl::after{transform:rotate(90deg);opacity:0}
  details .ans{padding:0 24px 22px;color:var(--ink-soft);font-size:16px}

  .contact{background:var(--bg-alt)}
  .contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
  @media(max-width:820px){.contact-grid{grid-template-columns:1fr;gap:30px}}
  .ci{display:flex;gap:14px;align-items:center;margin-bottom:18px}
  .ci .ico{margin:0;flex:0 0 50px}
  .ci a,.ci span{font-weight:700;font-size:17px}
  .ci small{display:block;color:var(--muted);font-weight:600;font-size:13px}
  form{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow)}
  form label{display:block;font-weight:700;font-size:14px;margin:0 0 7px}
  form input{width:100%;border:1.5px solid var(--line);border-radius:11px;padding:13px 15px;font:inherit;font-size:16px;margin-bottom:16px;transition:border-color .2s}
  form input:focus{outline:none;border-color:var(--brand)}
  form .btn{width:100%;justify-content:center}
  form small{display:block;color:var(--muted);font-size:12px;margin-top:12px;text-align:center}

  footer{background:var(--navy);color:#94A3B8;padding:40px 0;font-size:14px}
  footer .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:14px;align-items:center}
  footer a{color:#CBD5E1}
  .reveal{opacity:0;transform:translateY(30px);transition:opacity .7s cubic-bezier(.16,1,.3,1),transform .7s cubic-bezier(.16,1,.3,1)}
  .reveal.in{opacity:1;transform:none}
  @media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto}.reveal{opacity:1!important;transform:none!important}}