:root{--navy:#061743;--blue:#1669ff;--teal:#06b0a6;--ink:#0b1633;--muted:#51607f;--line:#dfe6f3;--bg:#f6f8fd;--card:#fff;--radius:14px}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;font:16px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;color:var(--ink);background:var(--bg)}
a{color:var(--blue)}img{max-width:100%}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
header.nav{position:sticky;top:0;z-index:10;background:rgba(255,255,255,.9);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.nav img{height:34px;display:block}
.nav nav{display:flex;gap:22px;align-items:center}
.nav nav a{color:var(--muted);text-decoration:none;font-size:15px}.nav nav a:hover{color:var(--ink)}
.btn{display:inline-flex;align-items:center;gap:8px;padding:11px 20px;border-radius:10px;border:1px solid transparent;font-weight:600;text-decoration:none;cursor:pointer;font-size:15px;transition:transform .12s,box-shadow .12s,background .12s}
.btn:hover{transform:translateY(-1px)}.btn:active{transform:none}
.btn-primary{background:var(--blue);color:#fff;box-shadow:0 6px 18px rgba(22,105,255,.28)}.btn-primary:hover{background:#0f56d6}
.btn-ghost{background:#fff;color:var(--navy);border-color:var(--line)}.btn-ghost:hover{border-color:var(--blue)}
.btn:focus-visible,a:focus-visible,summary:focus-visible,button:focus-visible{outline:3px solid #8db6ff;outline-offset:2px}
.hero{padding:76px 0 56px;background:radial-gradient(900px 380px at 80% -10%,rgba(6,176,166,.14),transparent),radial-gradient(800px 360px at 10% 0,rgba(22,105,255,.12),transparent)}
.hero .wrap{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
.eyebrow{display:inline-block;font-size:13px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--teal);margin-bottom:12px}
h1{font-size:clamp(34px,5vw,52px);line-height:1.1;margin:0 0 18px;color:var(--navy);letter-spacing:-.02em}
.lead{font-size:19px;color:var(--muted);margin:0 0 28px;max-width:34em}
.cta{display:flex;gap:12px;flex-wrap:wrap}
.hint{font-size:14px;color:var(--muted);margin-top:14px}
.panel{background:var(--navy);color:#cfe0ff;border-radius:var(--radius);padding:22px;font:14px/1.7 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;box-shadow:0 24px 60px rgba(6,23,67,.25)}
.panel .dots{display:flex;gap:6px;margin-bottom:14px}.panel .dots i{width:10px;height:10px;border-radius:50%;background:#2c3f78}
.panel .ok{color:#4fe3d6}.panel .dim{color:#7f94c9}
section{padding:68px 0}section h2{font-size:30px;margin:0 0 10px;color:var(--navy);letter-spacing:-.01em}
.sub{color:var(--muted);margin:0 0 34px;max-width:38em}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px;display:flex;flex-direction:column;transition:border-color .15s,box-shadow .15s}
.card.rec{border-color:var(--blue);box-shadow:0 10px 30px rgba(22,105,255,.14)}
.card h3{margin:10px 0 4px;font-size:20px;color:var(--navy)}.card p{margin:0 0 16px;color:var(--muted);font-size:15px}
.card .btn{margin-top:auto;justify-content:center}
.os-ico{width:44px;height:44px;border-radius:11px;display:grid;place-items:center;background:#eaf1ff;color:var(--blue)}
.os-ico svg{width:24px;height:24px}
.badge{align-self:flex-start;font-size:12px;font-weight:700;background:var(--blue);color:#fff;border-radius:99px;padding:2px 10px;margin-bottom:8px;display:none}
.card.rec .badge{display:inline-block}
.meta{font-size:13px;color:var(--muted);margin-top:10px;text-align:center}
.steps{counter-reset:s;list-style:none;margin:0;padding:0;display:grid;grid-template-columns:minmax(0,1fr);gap:14px}
.steps li{counter-increment:s;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px 16px 62px;position:relative}
.steps li::before{content:counter(s);position:absolute;left:18px;top:16px;width:30px;height:30px;border-radius:50%;background:var(--navy);color:#fff;display:grid;place-items:center;font-weight:700;font-size:14px}
.tabs{display:flex;gap:8px;margin-bottom:18px;flex-wrap:wrap}
.tab{border:1px solid var(--line);background:#fff;border-radius:99px;padding:8px 18px;font-weight:600;color:var(--muted);cursor:pointer;font-size:15px}
.tab[aria-selected=true]{background:var(--navy);border-color:var(--navy);color:#fff}
[role=tabpanel][hidden]{display:none}
code,pre{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:14px}
code{background:#eaf0fb;padding:2px 6px;border-radius:6px}
pre{background:var(--navy);color:#dbe7ff;padding:14px 64px 14px 16px;max-width:100%;border-radius:10px;overflow:auto;margin:10px 0 0;position:relative}
pre code{background:none;padding:0;color:inherit}
.copy{position:absolute;top:8px;right:8px;background:#1a2f6b;color:#cfe0ff;border:0;border-radius:6px;padding:4px 10px;font-size:12px;cursor:pointer}
.feat{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.feat div{padding:4px 0}.feat h3{margin:0 0 4px;font-size:17px;color:var(--navy)}.feat p{margin:0;color:var(--muted);font-size:15px}
.alt{background:#fff;border-block:1px solid var(--line)}
details{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 18px;margin-bottom:10px}
summary{cursor:pointer;font-weight:600;color:var(--navy)}details p{margin:10px 0 0;color:var(--muted)}
table{width:100%;border-collapse:collapse;font-size:14px}td,th{text-align:left;padding:8px 10px;border-bottom:1px solid var(--line);word-break:break-all}th{color:var(--muted);font-weight:600}
footer{padding:36px 0;color:var(--muted);font-size:14px;border-top:1px solid var(--line)}
footer .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px}
@media (max-width:860px){.hero .wrap,.grid3,.feat{grid-template-columns:1fr}.hero{padding-top:44px}.nav nav a.hide-sm{display:none}}
@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}