:root { --bg:#f4f5ff; --ink:#1c1c28; --muted:#62647a; --card:#ffffff; --line:#e3e5f5; --accent:#5b6cff; --accent2:#a35bff; --ok:#1f9d55; }
@media (prefers-color-scheme: dark) { :root { --bg:#0e0f1a; --ink:#f1f1fa; --muted:#a3a5bd; --card:#171929; --line:#262944; } }
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin:0; background:var(--bg); color:var(--ink); font:17px/1.55 -apple-system, system-ui, "Segoe UI", sans-serif; }
a { color:var(--accent); }
header.nav { max-width:980px; margin:0 auto; padding:18px 20px; display:flex; align-items:center; gap:22px; }
header.nav .logo { font-weight:800; font-size:20px; color:var(--ink); text-decoration:none; margin-right:auto; }
header.nav a.link { color:var(--muted); text-decoration:none; font-size:15px; }
main { max-width:980px; margin:0 auto; padding:0 20px 80px; }
.hero { text-align:center; padding:56px 0 36px; }
.hero h1 { font-size:clamp(34px,6vw,56px); line-height:1.08; margin:0 0 16px; letter-spacing:-0.02em; }
.hero p { color:var(--muted); font-size:20px; max-width:640px; margin:0 auto 26px; }
.btn { display:inline-block; padding:14px 30px; border-radius:999px; color:#fff; text-decoration:none; font-weight:650; border:0; cursor:pointer; font-size:17px;
       background:linear-gradient(90deg,var(--accent),var(--accent2)); }
.btn.ghost { background:transparent; color:var(--ink); border:1px solid var(--line); }
small, .muted { color:var(--muted); }
section { margin:64px 0; }
h2 { font-size:30px; letter-spacing:-0.01em; margin:0 0 8px; }
.lead { color:var(--muted); margin:0 0 24px; }
.grid { display:grid; gap:16px; grid-template-columns:repeat(auto-fit,minmax(260px,1fr)); }
.card { background:var(--card); border:1px solid var(--line); border-radius:20px; padding:22px; }
.card h3 { margin:0 0 6px; font-size:19px; }
.card p { margin:0; color:var(--muted); font-size:16px; }
.switch { display:inline-flex; background:var(--card); border:1px solid var(--line); border-radius:999px; padding:4px; margin:0 0 22px; }
.switch button { border:0; background:transparent; color:var(--ink); padding:8px 18px; border-radius:999px; font-size:15px; font-weight:600; cursor:pointer; }
.switch button.on { background:linear-gradient(90deg,var(--accent),var(--accent2)); color:#fff; }
.price { font-size:40px; font-weight:800; letter-spacing:-0.02em; }
.price small { font-size:16px; font-weight:500; }
.plan ul { list-style:none; padding:0; margin:14px 0 18px; color:var(--muted); font-size:15.5px; }
.plan li { padding:4px 0; } .plan li::before { content:"✓  "; color:var(--ok); font-weight:700; }
.plan.featured { border:2px solid var(--accent); position:relative; }
.tag { position:absolute; top:-12px; right:18px; background:var(--accent); color:#fff; font-size:12px; font-weight:700; padding:3px 10px; border-radius:999px; }
.save { color:var(--ok); font-weight:650; font-size:15px; }
ol.steps { padding-left:22px; margin:0; } ol.steps li { margin:8px 0; }
details { background:var(--card); border:1px solid var(--line); border-radius:14px; padding:14px 18px; margin:10px 0; }
summary { cursor:pointer; font-weight:650; } details p { color:var(--muted); margin:10px 0 0; }
footer { max-width:980px; margin:0 auto; padding:30px 20px 50px; color:var(--muted); font-size:14px; border-top:1px solid var(--line); display:flex; gap:20px; flex-wrap:wrap; }
footer a { color:var(--muted); }
.doc { max-width:720px; margin:0 auto; padding:10px 20px 70px; } .doc h1 { font-size:34px; } .doc h2 { font-size:21px; margin-top:30px; }
.notice { background:rgba(255,170,0,.12); border:1px solid rgba(255,170,0,.4); border-radius:12px; padding:12px 16px; font-size:15px; }