:root{
    --navy:#070E1E; --navy-2:#0B1730; --navy-3:#10213F; --deep:#04091505;
    --bg:#060C1A;
    --blue:#3A84F6; --blue-br:#6BA5FF; --cyan:#49B6E8;
    --paper:#F5F8FC; --paper-2:#EAF1F9;
    --ink:#0A1428; --ink-2:#36435E;
    --t:#EAF0FB; --tm:#9DADC8; --td:#62748F;
    --t-mut:#9DADC8; --t-dim:#62748F;
    --line:rgba(255,255,255,.10); --line-soft:rgba(255,255,255,.055);
    --l-line:rgba(10,20,40,.12);
    --maxw:1240px; --ease:cubic-bezier(.2,.7,.2,1); --ease2:cubic-bezier(.16,1,.3,1);
  }
  *{box-sizing:border-box;margin:0;padding:0;}
  html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
  body{background:var(--bg);color:var(--t);font-family:"Sora",system-ui,sans-serif;font-size:17px;line-height:1.6;-webkit-font-smoothing:antialiased;overflow-x:hidden;}
  ::selection{background:var(--blue);color:#fff;}
  .wrap{max-width:var(--maxw);margin:0 auto;padding:0 36px;position:relative;}
  a{color:inherit;text-decoration:none;}
  img{max-width:100%;}
  .mono{font-family:"JetBrains Mono",monospace;}
  .kick{font-family:"JetBrains Mono",monospace;font-size:11px;letter-spacing:.24em;text-transform:uppercase;color:var(--blue-br);}
  h1,h2,h3,h4{font-weight:600;letter-spacing:-.02em;line-height:1.08;}
  .btn{display:inline-flex;align-items:center;gap:9px;font-weight:500;font-size:14.5px;padding:14px 26px;border-radius:9px;transition:all .3s var(--ease);}
  .btn-primary{background:var(--blue);color:#fff;}
  .btn-primary:hover{background:var(--blue-br);transform:translateY(-2px);box-shadow:0 16px 34px -14px rgba(46,107,230,.65);}
  .btn-ghost{border:1px solid rgba(255,255,255,.22);color:var(--t);backdrop-filter:blur(6px);}
  .btn-ghost:hover{border-color:var(--blue-br);color:var(--blue-br);}

  /* nav */
  header{position:fixed;top:0;left:0;right:0;z-index:100;transition:background .4s,border-color .4s,backdrop-filter .4s;border-bottom:1px solid transparent;}
  header.scrolled{background:rgba(6,12,26,.8);backdrop-filter:blur(18px);border-bottom:1px solid var(--line);}
  nav{display:flex;align-items:center;justify-content:space-between;height:80px;}
  .logo{height:25px;width:auto;display:block;}
  .nav-links{display:flex;align-items:center;gap:32px;}
  .nav-links a{font-size:14px;color:var(--t-mut);transition:color .25s;}
  .nav-links a:hover{color:var(--t);}
  .nav-cta{font-weight:600;color:#fff!important;background:linear-gradient(180deg,var(--blue-br),var(--blue));border:1px solid var(--blue);padding:10px 22px;border-radius:9px;box-shadow:0 6px 18px -8px rgba(46,107,230,.6);transition:all .3s var(--ease);}
  .nav-cta:hover{background:var(--blue-br);border-color:var(--blue-br);transform:translateY(-2px);box-shadow:0 12px 28px -8px rgba(46,107,230,.85);}
  .burger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px;}
  .burger span{width:24px;height:2px;background:var(--t);transition:.3s;}

  /* hero */
  .hero{position:relative;min-height:86vh;display:flex;align-items:center;overflow:hidden;}
  .hero-photo{position:absolute;inset:0;z-index:0;background:url('../img/hero-bg.jpg') center 46%/cover no-repeat;}
  .hero-photo::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(6,12,26,.82) 0%,rgba(6,12,26,.46) 45%,rgba(6,12,26,.08) 75%),linear-gradient(180deg,transparent 45%,rgba(6,12,26,.5) 84%,var(--bg) 100%);}@media(max-width:680px){.hero-photo::after{background:linear-gradient(180deg,rgba(6,12,26,.66),rgba(6,12,26,.56) 45%,var(--bg)),rgba(6,12,26,.32);}}
  .hero canvas{position:absolute;inset:0;z-index:1;width:100%;height:100%;}
  .hero-inner{position:relative;z-index:3;padding:92px 0 34px;width:100%;}
  .hero-rule{display:flex;align-items:center;gap:16px;margin-bottom:26px;color:var(--t-mut);}
  .hero-rule .ln{width:42px;height:1px;background:var(--blue-br);}
  .hero h1{font-size:clamp(42px,7vw,92px);font-weight:700;max-width:15ch;letter-spacing:-.03em;}
  .hero h1 .g{background:linear-gradient(100deg,var(--blue-br),var(--cyan));-webkit-background-clip:text;background-clip:text;color:transparent;}
  .hero-lead{margin-top:28px;max-width:560px;font-size:19px;color:#C3D0E6;font-weight:300;line-height:1.65;}
  .hero-cta{margin-top:38px;display:flex;gap:16px;flex-wrap:wrap;}
  .scroll-hint{position:absolute;left:36px;bottom:30px;z-index:3;font-family:"JetBrains Mono",monospace;font-size:10px;letter-spacing:.2em;text-transform:uppercase;color:var(--t-dim);display:flex;align-items:center;gap:10px;}
  .scroll-hint::before{content:"";width:1px;height:34px;background:linear-gradient(var(--blue-br),transparent);}

  /* stat band */
  .stats{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--navy-2);}
  .stats-grid{display:grid;grid-template-columns:repeat(4,1fr);}
  .stat{padding:44px 30px;border-left:1px solid var(--line);}
  .stat:first-child{border-left:none;}
  .stat .n{font-size:48px;font-weight:700;letter-spacing:-.03em;color:#fff;}
  .stat .n span{color:var(--blue-br);}
  .stat .c{margin-top:10px;font-size:13.5px;color:var(--t-mut);max-width:210px;}

  section{position:relative;}
  .pad{padding:120px 0;}
  .sec-head{max-width:740px;margin-bottom:60px;}
  .sec-head .kick{display:block;margin-bottom:18px;}
  .sec-head h2{font-size:clamp(30px,4.6vw,54px);font-weight:600;}
  .sec-head p{margin-top:20px;color:var(--t-mut);font-size:18px;font-weight:300;}
  .light{background:var(--paper);color:var(--ink);}
  .light .kick{color:var(--blue);}.light .sec-head p{color:var(--ink-2);}.light h2,.light h3,.light h4{color:var(--ink);}

  /* about split with photo */
  .split{display:grid;grid-template-columns:1.05fr .95fr;gap:64px;align-items:center;}
  .split .ph{border-radius:18px;overflow:hidden;border:1px solid var(--line);position:relative;box-shadow:0 40px 80px -50px rgba(0,0,0,.8);}
  .split .ph img{display:block;width:100%;height:100%;object-fit:cover;aspect-ratio:4/3;}
  .split .ph .tag{position:absolute;left:18px;bottom:18px;background:rgba(6,12,26,.7);backdrop-filter:blur(8px);border:1px solid var(--line);border-radius:10px;padding:10px 16px;font-family:"JetBrains Mono",monospace;font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--blue-br);}
  .lead-p{font-size:18px;color:var(--t-mut);font-weight:300;margin-bottom:20px;line-height:1.7;}
  .vv{display:flex;gap:40px;margin-top:30px;flex-wrap:wrap;}
  .vv h5{font-family:"JetBrains Mono",monospace;font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--blue-br);margin-bottom:8px;}
  .vv p{font-size:14.5px;color:var(--t-mut);font-weight:300;max-width:240px;}

  /* feature band (full-bleed photo) */
  .feature{position:relative;min-height:520px;display:flex;align-items:center;overflow:hidden;border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
  .feature .fb{position:absolute;inset:0;background:url('../img/legacy/carrier.jpg') center/cover no-repeat;}
  .feature .fb::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(6,12,26,.94) 0%,rgba(6,12,26,.78) 45%,rgba(6,12,26,.4) 100%);}
  .feature .fc{position:relative;z-index:2;max-width:620px;}
  .feature h2{font-size:clamp(28px,4vw,46px);font-weight:600;margin:18px 0 16px;}
  .feature p{color:#C3D0E6;font-weight:300;font-size:18px;}
  .feature .q{margin-top:26px;display:flex;gap:26px;flex-wrap:wrap;}
  .feature .q b{display:block;font-size:30px;font-weight:700;color:var(--blue-br);}
  .feature .q span{font-size:13px;color:var(--t-mut);}

  /* cards */
  .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
  .card{padding:32px 28px;border:1px solid var(--line);border-radius:15px;background:linear-gradient(180deg,rgba(255,255,255,.025),transparent);transition:transform .4s var(--ease),border-color .4s,background .4s;}
  .card:hover{transform:translateY(-6px);border-color:rgba(94,155,255,.45);background:linear-gradient(180deg,rgba(46,107,230,.09),transparent);}
  .card .ic{width:48px;height:48px;border-radius:12px;background:rgba(46,107,230,.13);border:1px solid rgba(94,155,255,.28);display:flex;align-items:center;justify-content:center;color:var(--blue-br);margin-bottom:20px;}
  .card h4{font-size:18px;font-weight:600;margin-bottom:10px;}
  .card p{font-size:14.5px;color:var(--t-mut);font-weight:300;line-height:1.6;}
  .light .card{border-color:var(--l-line);background:#fff;box-shadow:0 1px 2px rgba(10,20,40,.05);}
  .light .card:hover{border-color:rgba(46,107,230,.4);box-shadow:0 24px 46px -26px rgba(46,107,230,.4);}
  .light .card p{color:var(--ink-2);}

  /* network architecture (light, diagram) */
  .net-points{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:30px;}
  .np{padding:22px 20px;border:1px solid var(--l-line);border-radius:14px;background:#fff;box-shadow:0 1px 2px rgba(10,20,40,.05);}
  .np .k{font-family:"JetBrains Mono",monospace;font-size:12px;color:var(--blue);}
  .np b{display:block;font-size:15px;font-weight:600;color:var(--ink);margin:9px 0 6px;}
  .np span{font-size:13px;color:var(--ink-2);font-weight:300;line-height:1.5;}
  .net-figs{display:grid;grid-template-columns:1fr 1fr;gap:18px;align-items:stretch;}
  .net-fig{margin:0;border:1px solid var(--l-line);border-radius:18px;background:#fff;padding:30px 28px 18px;box-shadow:0 30px 60px -42px rgba(58,132,246,.4);display:flex;flex-direction:column;justify-content:center;}
  .net-fig img{width:100%;display:block;}
  .net-fig figcaption{margin-top:18px;text-align:center;font-family:"JetBrains Mono",monospace;font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--blue);}
  @media(max-width:900px){.net-figs{grid-template-columns:1fr;}.net-points{grid-template-columns:1fr 1fr;}}
  @media(max-width:600px){.net-points{grid-template-columns:1fr;}}

  /* model */
  .model-list{list-style:none;}
  .model-list li{display:flex;gap:16px;padding:22px 0;border-top:1px solid var(--line);}
  .model-list li .k{font-family:"JetBrains Mono",monospace;font-size:12px;color:var(--blue-br);padding-top:4px;min-width:30px;}
  .model-list li b{display:block;font-size:16px;font-weight:600;margin-bottom:4px;}
  .model-list li span{font-size:14px;color:var(--t-mut);font-weight:300;}
  .model-visual{border:1px solid var(--line);border-radius:18px;padding:44px;background:radial-gradient(120% 100% at 80% 0%,rgba(46,107,230,.14),transparent 60%),var(--navy-2);min-height:360px;display:flex;flex-direction:column;justify-content:center;gap:18px;}
  .mv-big{font-size:68px;font-weight:800;letter-spacing:-.03em;background:linear-gradient(100deg,var(--blue-br),var(--cyan));-webkit-background-clip:text;background-clip:text;color:transparent;}
  .mv-row{display:flex;align-items:center;gap:14px;font-size:14px;color:var(--t-mut);}
  .mv-row .d{width:8px;height:8px;border-radius:50%;background:var(--blue-br);flex:0 0 auto;}

  /* coverage */
  .countries{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:10px;}
  .country{display:flex;align-items:center;gap:13px;padding:20px 22px;border:1px solid var(--line);border-radius:14px;font-size:16px;font-weight:500;transition:all .3s var(--ease);background:linear-gradient(180deg,rgba(255,255,255,.02),transparent);}
  .country:hover{border-color:var(--blue-br);background:rgba(46,107,230,.08);transform:translateY(-3px);}
  .country .fl{font-size:24px;line-height:1;}
  .cov-grid{display:grid;grid-template-columns:1.02fr .98fr;gap:56px;align-items:center;}
  .cov-grid .countries{grid-template-columns:1fr 1fr;margin-top:30px;}
  .cov-map{position:relative;}
  .cov-map img{width:100%;max-width:540px;display:block;margin:0 auto;filter:drop-shadow(0 30px 55px rgba(58,132,246,.18));}
  .light .country{border-color:var(--l-line);background:#fff;color:var(--ink);box-shadow:0 1px 2px rgba(10,20,40,.05);}
  .light .country:hover{border-color:var(--blue);background:var(--paper-2);transform:translateY(-3px);}

  /* contact */
  .contact-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:56px;align-items:start;}
  .offices{display:grid;grid-template-columns:1fr 1fr;gap:14px;}
  .office{padding:22px;border:1px solid var(--line);border-radius:13px;}
  .office h5{font-size:13px;font-weight:600;color:var(--blue-br);margin-bottom:8px;}
  .office p{font-size:12.5px;color:var(--t-mut);font-weight:300;line-height:1.55;}
  .cform{display:flex;flex-direction:column;gap:14px;}
  .cform input,.cform textarea{font-family:inherit;font-size:15px;padding:15px 17px;border:1px solid var(--line);border-radius:11px;background:var(--navy-2);color:var(--t);transition:border-color .25s;}
  .cform input::placeholder,.cform textarea::placeholder{color:var(--t-dim);}
  .cform input:focus,.cform textarea:focus{outline:none;border-color:var(--blue-br);}
  .cform button{margin-top:6px;cursor:pointer;border:none;}

  footer{background:#04091A;border-top:1px solid var(--line);padding:66px 0 40px;}
  .foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:42px;}
  .foot-brand .logo{height:26px;margin-bottom:18px;}
  .foot-brand p{font-size:14px;color:var(--t-dim);max-width:280px;line-height:1.6;}
  .foot-col h5{font-family:"JetBrains Mono",monospace;font-size:10.5px;letter-spacing:.18em;text-transform:uppercase;color:var(--t-dim);margin-bottom:16px;}
  .foot-col a{display:block;font-size:14px;color:var(--t-mut);padding:5px 0;transition:color .25s;}
  .foot-col a:hover{color:var(--blue-br);}
  .founded{display:flex;flex-direction:column;gap:12px;}
  .founded span{font-family:"JetBrains Mono",monospace;font-size:10.5px;letter-spacing:.18em;text-transform:uppercase;color:var(--t-dim);}
  .founded img{height:22px;width:auto;opacity:.85;}
  .foot-bot{display:flex;justify-content:space-between;align-items:center;margin-top:54px;padding-top:26px;border-top:1px solid var(--line);font-size:12.5px;color:var(--t-dim);font-family:"JetBrains Mono",monospace;flex-wrap:wrap;gap:12px;}

  /* RAN-sharing / commercial model */
  .compare{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-bottom:22px;}
  .cmp{border:1px solid var(--line);border-radius:16px;padding:32px 30px;background:linear-gradient(180deg,rgba(255,255,255,.02),transparent);}
  .cmp .tg{display:block;font-family:"JetBrains Mono",monospace;font-size:11px;letter-spacing:.16em;text-transform:uppercase;margin-bottom:16px;}
  .cmp h3{font-size:20px;font-weight:600;margin-bottom:16px;letter-spacing:-.01em;}
  .cmp ul{list-style:none;}
  .cmp li{display:flex;gap:12px;padding:12px 0;font-size:14.5px;font-weight:300;line-height:1.5;border-top:1px solid var(--line-soft);}
  .cmp li:first-of-type{border-top:none;}
  .cmp li svg{flex:0 0 auto;margin-top:3px;}
  .cmp.old{opacity:.94;}
  .cmp.old .tg{color:var(--t-dim);}.cmp.old li{color:var(--t-mut);}.cmp.old li svg{color:#7585A0;}
  .cmp.new{border-color:rgba(94,155,255,.5);background:linear-gradient(180deg,rgba(46,107,230,.13),transparent 72%);box-shadow:0 34px 80px -46px rgba(46,107,230,.7);}
  .cmp.new .tg{color:var(--blue-br);}.cmp.new li{color:#D8E3F5;}.cmp.new li svg{color:var(--blue-br);}
  .ran-benefits{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;}
  .rb{padding:22px;border:1px solid var(--line);border-radius:13px;background:var(--navy-2);}
  .rb b{display:block;font-size:15px;font-weight:600;color:#fff;margin-bottom:7px;}
  .rb span{font-size:12.5px;color:var(--t-mut);font-weight:300;line-height:1.55;}
  .reveal{opacity:0;transform:translateY(30px);transition:opacity .9s var(--ease2),transform .9s var(--ease2);}
  .reveal.in{opacity:1;transform:none;}

  @media(max-width:980px){
    .stats-grid{grid-template-columns:1fr 1fr;}.stat:nth-child(3){border-left:none;}
    .grid-3{grid-template-columns:1fr 1fr;}.compare{grid-template-columns:1fr;}.ran-benefits{grid-template-columns:1fr 1fr;}
    .split,.contact-grid,.net-grid,.cov-grid{grid-template-columns:1fr;gap:40px;}
    .countries{grid-template-columns:1fr 1fr;}
    .foot-grid{grid-template-columns:1fr 1fr;gap:32px;}
  }
  @media(max-width:680px){
    .wrap{padding:0 22px;}.nav-links{display:none;}
    .nav-links.open{display:flex;position:absolute;top:80px;left:0;right:0;flex-direction:column;align-items:flex-start;gap:20px;background:rgba(6,12,26,.97);backdrop-filter:blur(16px);padding:26px 22px;border-bottom:1px solid var(--line);}
    .burger{display:flex;}.grid-3,.offices,.stats-grid,.countries,.ran-benefits{grid-template-columns:1fr;}
    .stat{border-left:none;}.foot-grid{grid-template-columns:1fr;}
  }

  .form-note{padding:14px 18px;border-radius:11px;margin-bottom:20px;font-size:14.5px;line-height:1.5;}
  .form-note.ok{background:rgba(46,107,230,.12);border:1px solid rgba(94,155,255,.42);color:#DCE6F6;}
  .form-note.err{background:rgba(232,90,90,.10);border:1px solid rgba(232,90,90,.42);color:#ffdada;}