:root{--blue:#2F7BFF;--yellow:#FFC531;--navy:#1B2A5C;--bg:#F4F7FF;--fg:#1B2A5C;--card:#fff;--muted:#5b6785;--line:#dbe3f5}
@media(prefers-color-scheme:dark){:root{--bg:#0f1730;--fg:#eaf0ff;--card:#17214a;--muted:#a3b0d6;--line:#2a3766;--blue:#6aa0ff}}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif}
a{color:var(--blue)}.top{display:flex;gap:16px;align-items:center;justify-content:space-between;flex-wrap:wrap;padding:12px 16px;max-width:1000px;margin:0 auto}
.brand{display:flex;gap:10px;align-items:center;text-decoration:none;color:var(--fg);font-weight:800}.brand img{border-radius:9px}
nav{display:flex;gap:14px;flex-wrap:wrap;font-size:14px}nav a{text-decoration:none}nav .lang{font-weight:700}
main{max-width:1000px;margin:0 auto;padding:8px 16px 40px}.hero{text-align:center;padding:32px 0 24px}
.icon{border-radius:36px;box-shadow:0 12px 32px rgba(27,42,92,.25)}h1{font-size:clamp(32px,6vw,52px);line-height:1.1;margin:16px 0 4px}
.tag{font-size:20px;font-weight:700;color:var(--blue);margin:0 0 12px}.sub{max-width:640px;margin:0 auto 24px;color:var(--muted)}
.btn{display:inline-block;padding:14px 26px;border-radius:14px;background:var(--navy);color:#fff;font-weight:800;text-decoration:none;border:3px solid var(--yellow)}
.btn.disabled{background:var(--card);color:var(--muted);border-color:var(--line);cursor:default}
.features h2{text-align:center}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:14px}
article{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:16px}article h3{margin:0 0 4px}article p{margin:0;color:var(--muted)}
.doc{max-width:760px}.doc h1{font-size:34px}.doc h2{margin-top:28px}.doc h3{margin-bottom:2px}.doc ul{padding-left:20px}.doc li{margin:6px 0}.muted{color:var(--muted)}
footer{max-width:1000px;margin:0 auto;padding:16px;color:var(--muted);font-size:14px;border-top:1px solid var(--line)}footer p{margin:4px 0}