:root{--bg:#0b1020;--ink:#0f172a;--muted:#5b6478;--line:#e6e8ef;--brand:#6366f1;--brand2:#06b6d4;--soft:#f6f7fb;--r:18px}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,system-ui,-apple-system,"Segoe UI",sans-serif;color:var(--ink);background:#fff;line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
.wrap{max-width:1160px;margin:0 auto;padding:0 24px}
h1,h2,h3{line-height:1.15;letter-spacing:-.02em;margin:0 0 .5em}
h1{font-size:clamp(2.2rem,5vw,3.6rem);font-weight:800}
h2{font-size:clamp(1.7rem,3.4vw,2.5rem);font-weight:800;max-width:780px}
h3{font-size:1.1rem;font-weight:700}
.grad{background:linear-gradient(90deg,#818cf8,#22d3ee);-webkit-background-clip:text;background-clip:text;color:transparent}
.eyebrow{display:inline-block;font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.12em;color:var(--brand);margin-bottom:14px}
.lead{font-size:1.15rem;color:var(--muted);max-width:640px}
.center{margin:0 auto;text-align:center}
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 24px;border-radius:12px;font-weight:600;background:linear-gradient(135deg,var(--brand),#4f46e5);color:#fff;box-shadow:0 8px 24px -8px rgba(99,102,241,.6);transition:transform .15s,box-shadow .15s}
.btn:hover{transform:translateY(-1px);box-shadow:0 12px 28px -8px rgba(99,102,241,.7)}
.btn-sm{padding:9px 16px;font-size:.9rem}
.btn-ghost{background:transparent;color:#e2e8f0;box-shadow:none;border:1px solid rgba(255,255,255,.18)}
.btn-light{background:#fff;color:var(--ink);box-shadow:0 10px 30px -10px rgba(0,0,0,.4)}
/* nav */
.nav{position:sticky;top:0;z-index:20;background:rgba(11,16,32,.82);backdrop-filter:saturate(1.4) blur(12px);border-bottom:1px solid rgba(255,255,255,.06)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.15rem;color:#fff}
.brand b{color:#22d3ee;font-weight:700}
.links{display:flex;align-items:center;gap:28px;color:#cbd5e1;font-size:.95rem}
.links a:not(.btn):hover{color:#fff}
/* hero */
.hero{position:relative;overflow:hidden;background:var(--bg);color:#fff;padding:96px 0 110px}
.glow{position:absolute;inset:-30% -10% auto auto;width:900px;height:900px;background:radial-gradient(closest-side,rgba(99,102,241,.35),transparent),radial-gradient(closest-side at 30% 70%,rgba(6,182,212,.25),transparent);filter:blur(10px);pointer-events:none}
.hero-grid{position:relative;display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:center}
.hero .lead{color:#b7c0d4}
.cta-row{display:flex;gap:14px;flex-wrap:wrap;margin:30px 0 16px}
.note{font-size:.9rem;color:#8591a8}
.mock{background:linear-gradient(180deg,#141b33,#0f1529);border:1px solid rgba(255,255,255,.09);border-radius:22px;box-shadow:0 40px 80px -30px rgba(0,0,0,.7),0 0 0 1px rgba(99,102,241,.08);overflow:hidden;transform:perspective(1200px) rotateY(-6deg)}
.mock-bar{display:flex;align-items:center;gap:7px;padding:14px 18px;border-bottom:1px solid rgba(255,255,255,.06);font-size:.8rem;color:#94a3b8}
.mock-bar i{width:10px;height:10px;border-radius:50%;background:#334155}.mock-bar i:first-child{background:#f87171}.mock-bar i:nth-child(2){background:#fbbf24}.mock-bar i:nth-child(3){background:#34d399}
.mock-bar span{margin-left:auto}
.mock-body{padding:22px}
.timers{display:flex;gap:10px;justify-content:center;margin-bottom:14px}
.timer{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.08);border-radius:12px;padding:8px 16px;text-align:center}
.timer small{display:block;font-size:.7rem;color:#94a3b8;text-transform:uppercase;letter-spacing:.08em}
.timer strong{font-size:1.3rem;font-variant-numeric:tabular-nums}
.timer.live{border-color:rgba(34,211,238,.5);box-shadow:0 0 0 3px rgba(34,211,238,.1)}.timer.live strong{color:#22d3ee}
.q{text-align:center;font-weight:600;color:#e2e8f0;margin:0 0 16px}
.cam{position:relative;aspect-ratio:16/10;border-radius:14px;background:radial-gradient(circle at 50% 35%,#2b3557,#151b31);display:grid;place-items:center;overflow:hidden}
.avatar{width:34%;aspect-ratio:1;border-radius:50%;background:linear-gradient(180deg,#4b5578,#323a5a);position:relative;top:14%}
.avatar:before{content:"";position:absolute;left:50%;top:-56%;transform:translateX(-50%);width:62%;aspect-ratio:1;border-radius:50%;background:#56608a}
.rec{position:absolute;top:12px;left:12px;font-size:.72rem;font-weight:700;letter-spacing:.08em;background:rgba(0,0,0,.45);padding:4px 10px;border-radius:999px;display:flex;align-items:center;gap:6px}
.rec em{width:8px;height:8px;border-radius:50%;background:#ef4444;animation:pulse 1.4s infinite}
@keyframes pulse{50%{opacity:.25}}
.progress{height:6px;border-radius:99px;background:rgba(255,255,255,.08);margin-top:16px;overflow:hidden}.progress span{display:block;height:100%;background:linear-gradient(90deg,var(--brand),var(--brand2))}
/* sections */
.section{padding:100px 0}.section.alt{background:var(--soft)}
.band{padding:100px 0 40px;border-bottom:1px solid var(--line)}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:56px}
.stack p{margin:0 0 18px;color:var(--muted);font-size:1.05rem;padding-left:18px;border-left:3px solid #e0e3ff}
.stack b{color:var(--ink)}
.solution{text-align:center;padding-top:80px;padding-bottom:60px}.solution h2{margin:0 auto .5em}
.steps{list-style:none;padding:0;margin:48px 0 0;display:grid;grid-template-columns:repeat(4,1fr);gap:22px;counter-reset:s}
.steps li{position:relative;padding:28px 24px;border:1px solid var(--line);border-radius:var(--r);background:#fff}
.steps li span{display:grid;place-items:center;width:40px;height:40px;border-radius:12px;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;font-weight:800;margin-bottom:18px}
.steps p,.card p,.who-card p{color:var(--muted);margin:0;font-size:.97rem}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:48px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:28px;transition:transform .15s,box-shadow .15s}
.card:hover{transform:translateY(-3px);box-shadow:0 18px 40px -22px rgba(15,23,42,.25)}
.ic{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;font-size:1.35rem;background:#eef0ff;margin-bottom:16px}
.who{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:48px}
.who-card{padding:32px;border-radius:var(--r);background:linear-gradient(180deg,#f8f9ff,#fff);border:1px solid var(--line)}
.who-card h3{font-size:1.2rem}
.cta{background:var(--bg);color:#fff;padding:100px 0;position:relative;overflow:hidden}
.cta:before{content:"";position:absolute;inset:auto -20% -60% -20%;height:500px;background:radial-gradient(closest-side,rgba(99,102,241,.35),transparent)}
.cta-inner{position:relative;text-align:center}.cta h2{margin:0 auto .4em}.cta p{color:#b7c0d4;font-size:1.1rem;max-width:580px;margin:0 auto 30px}
.contact-line{margin-top:26px!important;font-size:.95rem!important}.contact-line a{color:#22d3ee}
.footer{background:#070b17;color:#8591a8;padding:28px 0;font-size:.9rem}
.foot-inner{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap}.footer p{margin:0}.footer a:hover{color:#fff}
@media (max-width:960px){.hero-grid,.two-col{grid-template-columns:1fr}.mock{transform:none;max-width:520px}.steps{grid-template-columns:1fr 1fr}.grid,.who{grid-template-columns:1fr 1fr}}
@media (max-width:640px){.links a:not(.btn){display:none}.hero{padding:64px 0 72px}.section,.band{padding:72px 0}.steps,.grid,.who{grid-template-columns:1fr}.solution{padding-top:56px}}
/* v2: ai-collab */
.mono{font-family:"JetBrains Mono",ui-monospace,monospace;text-transform:none;letter-spacing:.02em;font-size:.9rem;background:rgba(99,102,241,.15);border:1px solid rgba(129,140,248,.35);color:#a5b4fc;padding:5px 12px;border-radius:999px}
.term{background:linear-gradient(180deg,#141b33,#0d1326);border:1px solid rgba(255,255,255,.09);border-radius:20px;box-shadow:0 40px 80px -30px rgba(0,0,0,.7);overflow:hidden}
.term pre{margin:0;padding:22px 22px 26px;font-family:"JetBrains Mono",ui-monospace,monospace;font-size:.8rem;line-height:1.85;color:#cbd5e1;white-space:pre;overflow-x:auto}
.term .c{color:#64748b}.term .p{color:#818cf8;display:inline-block;width:4.2em}.term .ok{color:#34d399}.term .warn{color:#fbbf24}
.principles{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;padding-top:64px;padding-bottom:60px}
.pr{padding:24px;border-radius:var(--r);border:1px solid var(--line);background:linear-gradient(180deg,#f8f9ff,#fff)}
.pr p{margin:0;color:var(--muted);font-size:.95rem}
.cases{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:40px}
.case{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:22px;padding:32px;transition:transform .15s,box-shadow .15s}
.case:hover{transform:translateY(-3px);box-shadow:0 22px 50px -26px rgba(15,23,42,.3)}
.case-top h3{font-size:1.45rem;margin:10px 0 10px}
.tag{display:inline-block;font-size:.74rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:#4f46e5;background:#eef0ff;padding:4px 10px;border-radius:999px}
.case>p{color:var(--muted);margin:0 0 14px}
.case ul{margin:0 0 20px;padding-left:20px;color:#334155;font-size:.95rem}.case li{margin-bottom:6px}
.case-link{margin-top:auto;font-weight:600;color:#4f46e5}.case-link.muted{color:#94a3b8;font-weight:500}
@media (max-width:960px){.principles{grid-template-columns:1fr 1fr}.cases{grid-template-columns:1fr}}
@media (max-width:640px){.principles{grid-template-columns:1fr}.term pre{font-size:.7rem}}