:root{
  --bg:#f6f8fc;--bg2:#ffffff;--fg:#0f1a2c;--muted:#5a6780;--line:rgba(15,26,44,.09);
  --card:#ffffff;--blue1:#42c0f4;--blue2:#1c7fe0;--blue3:#1854af;
  --bubble-in:#eef2f8;--bubble-out:linear-gradient(135deg,#2c9cf0,#1866d0);
  --shadow:0 20px 50px -20px rgba(24,84,175,.35);
}
@media (prefers-color-scheme:dark){
  :root{
    --bg:#0a0f1a;--bg2:#0f1626;--fg:#e8eef9;--muted:#93a1ba;--line:rgba(255,255,255,.08);
    --card:#121b2e;--bubble-in:#1a2540;--shadow:0 20px 60px -20px rgba(0,0,0,.7);
  }
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;-webkit-font-smoothing:antialiased}
a{color:var(--blue2);text-decoration:none}
a:hover{text-decoration:underline}
img{display:block}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}

.nav{position:sticky;top:0;z-index:10;background:color-mix(in srgb,var(--bg) 80%,transparent);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px;color:var(--fg);font-weight:700;font-size:1.15rem}
.brand:hover{text-decoration:none}
.brand img{border-radius:8px}
.nav-links{display:flex;align-items:center;gap:22px}
.nav-links a{color:var(--muted);font-weight:500}
.nav-links a:hover{color:var(--fg);text-decoration:none}

.btn{display:inline-flex;align-items:center;justify-content:center;padding:13px 22px;border-radius:999px;font-weight:600;transition:transform .15s ease,box-shadow .15s ease,background .15s ease}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-primary{background:linear-gradient(135deg,var(--blue1),var(--blue2));color:#fff;box-shadow:0 10px 24px -10px rgba(28,127,224,.8)}
.btn-ghost{border:1px solid var(--line);color:var(--fg);background:var(--bg2)}
.nav-links .btn-ghost{color:var(--fg)}
.btn-sm{padding:7px 16px}

.hero{position:relative;overflow:hidden;padding:88px 0 96px}
.glow{position:absolute;inset:-30% -10% auto auto;width:780px;height:780px;border-radius:50%;background:radial-gradient(closest-side,rgba(66,192,244,.35),rgba(28,127,224,.12),transparent);pointer-events:none}
.hero-in{position:relative;display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:center}
.pill{display:inline-flex;align-items:center;gap:8px;margin:0 0 20px;padding:6px 14px;border-radius:999px;background:var(--bg2);border:1px solid var(--line);color:var(--muted);font-size:.88rem;font-weight:500}
.dot{width:8px;height:8px;border-radius:50%;background:#34c759;box-shadow:0 0 0 4px rgba(52,199,89,.2)}
h1{margin:0 0 20px;font-size:clamp(2.4rem,5.4vw,4rem);line-height:1.06;letter-spacing:-.03em}
.grad{background:linear-gradient(120deg,var(--blue1),var(--blue2) 55%,#6b5cff);-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{margin:0 0 30px;font-size:1.15rem;color:var(--muted);max-width:36em}
.cta{display:flex;flex-wrap:wrap;gap:12px}
.fine{margin:18px 0 0;font-size:.88rem;color:var(--muted)}

.hero-art{position:relative;display:flex;justify-content:center}
.phone{width:320px;padding:18px 16px 16px;border-radius:36px;background:var(--bg2);border:1px solid var(--line);box-shadow:var(--shadow);display:flex;flex-direction:column;gap:9px;transform:rotate(-2deg)}
.phone-top{display:flex;align-items:center;gap:10px;padding:0 4px 12px;border-bottom:1px solid var(--line);margin-bottom:4px}
.phone-top img{border-radius:50%}
.phone-top b{display:block;font-size:.95rem}
.phone-top small{color:var(--muted);font-size:.78rem}
.bubble{max-width:82%;padding:9px 13px;border-radius:18px;font-size:.9rem;line-height:1.4}
.bubble.in{align-self:flex-start;background:var(--bubble-in);border-bottom-left-radius:6px}
.bubble.out{align-self:flex-end;background:var(--bubble-out);color:#fff;border-bottom-right-radius:6px}
.who{display:block;color:var(--blue2);font-weight:600;font-size:.78rem}
.ticks{margin-left:8px;font-size:.75rem;opacity:.85}
.thread{align-self:flex-start;margin:-3px 0 0 6px;font-size:.78rem;color:var(--blue2);font-weight:600}
.readers{align-self:flex-end;display:flex;align-items:center;gap:0;font-size:.74rem;color:var(--muted)}
.readers i{width:18px;height:18px;border-radius:50%;border:2px solid var(--bg2);margin-left:-6px}
.readers i.a1{background:linear-gradient(135deg,#ff9a8b,#ff6a88)}
.readers i.a2{background:linear-gradient(135deg,#a1e3a1,#34c759)}
.readers i.a3{background:linear-gradient(135deg,#ffd36e,#ff9f0a)}
.readers span{margin-left:6px}
.composer{display:flex;justify-content:space-between;align-items:center;margin-top:8px;padding:10px 14px;border-radius:999px;background:var(--bubble-in);color:var(--muted);font-size:.88rem}
.composer b{color:var(--blue2)}
.float-icon{position:absolute;right:2%;top:-44px;width:132px;height:132px;border-radius:30px;box-shadow:0 24px 50px -16px rgba(24,84,175,.7);transform:rotate(8deg)}

.features,.platforms{padding:88px 0}
.features{background:var(--bg2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
h2{margin:0 0 10px;text-align:center;font-size:clamp(1.8rem,3.6vw,2.6rem);letter-spacing:-.02em}
.sub{margin:0 auto 48px;max-width:34em;text-align:center;color:var(--muted);font-size:1.08rem}
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.card{padding:24px;border-radius:20px;background:var(--card);border:1px solid var(--line);transition:transform .2s ease,box-shadow .2s ease}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.ico{display:grid;place-items:center;width:46px;height:46px;margin-bottom:14px;border-radius:14px;background:linear-gradient(135deg,rgba(66,192,244,.18),rgba(28,127,224,.18));font-size:1.4rem}
.card h3{margin:0 0 6px;font-size:1.05rem}
.card p{margin:0;color:var(--muted);font-size:.94rem}

.plats{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.plat{display:flex;flex-direction:column;align-items:center;gap:10px;padding:26px 12px;border-radius:20px;background:var(--card);border:1px solid var(--line)}
.plat b{font-size:1.1rem}
.badge{padding:5px 12px;border-radius:999px;background:var(--bubble-in);color:var(--muted);font-size:.78rem;font-weight:600;text-align:center}
.gh{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-top:40px;padding:32px 36px;border-radius:24px;background:linear-gradient(135deg,var(--blue1),var(--blue3));color:#fff}
.gh h3{margin:0 0 4px;font-size:1.35rem}
.gh p{margin:0;opacity:.9}
.gh .btn-primary{background:#fff;color:var(--blue3);box-shadow:none}

.foot{padding:32px 0;color:var(--muted);font-size:.9rem}
.foot-in{display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px}
.foot a{color:var(--muted)}

@media (max-width:960px){
  .hero-in{grid-template-columns:1fr;gap:64px}
  .hero{padding:56px 0 80px}
  .grid{grid-template-columns:repeat(2,1fr)}
  .plats{grid-template-columns:repeat(3,1fr)}
}
@media (max-width:600px){
  .nav-links a:not(.btn){display:none}
  .grid{grid-template-columns:1fr}
  .plats{grid-template-columns:repeat(2,1fr)}
  .phone{width:100%;max-width:320px}
  .float-icon{width:84px;height:84px;border-radius:20px;right:0;top:-34px}
  .gh{flex-direction:column;align-items:flex-start;padding:28px 24px}
  .features,.platforms{padding:64px 0}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .btn,.card{transition:none}
}