*{box-sizing:border-box}body{margin:0;font-family:Inter,system-ui,sans-serif;color:#0f172a;background:#f8fafc;line-height:1.55}
.wrap{max-width:1140px;margin:0 auto;padding:0 20px}.row{display:flex;align-items:center;justify-content:space-between}
.nav{position:sticky;top:0;z-index:9;background:rgba(255,255,255,.85);backdrop-filter:blur(10px);border-bottom:1px solid #e2e8f0}.nav .row{height:64px}
.logo{font-weight:800;font-size:20px;color:#0f172a;text-decoration:none}.mark{color:#0ea5e9}.nav nav a{margin-left:22px;color:#475569;text-decoration:none;font-weight:500}
.hero{background:radial-gradient(1000px 420px at 15% -10%,#cffafe,transparent),radial-gradient(900px 400px at 95% 0%,#e0e7ff,transparent);padding:78px 0 56px;text-align:center}
.pill{display:inline-block;background:#fff;border:1px solid #e2e8f0;border-radius:99px;padding:6px 14px;font-size:14px;color:#475569;box-shadow:0 1px 2px #0001}
h1{font-size:clamp(34px,5.8vw,60px);line-height:1.08;letter-spacing:-.03em;margin:22px 0 16px;font-weight:800}
.grad{background:linear-gradient(90deg,#0ea5e9,#6366f1,#8b5cf6);-webkit-background-clip:text;color:transparent}
.lead{font-size:18px;color:#475569;max-width:640px;margin:0 auto 28px}.cta{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.btn{display:inline-block;border:0;border-radius:12px;padding:13px 22px;font:600 16px Inter,sans-serif;cursor:pointer;text-decoration:none;transition:.15s}
.primary{background:linear-gradient(135deg,#0ea5e9,#6366f1);color:#fff;box-shadow:0 8px 24px -8px #0ea5e9aa}.primary:hover{transform:translateY(-1px)}
.ghost{background:#fff;color:#0f172a;border:1px solid #e2e8f0}.small{padding:8px 14px;font-size:14px;background:#e0f2fe;color:#0369a1}
.stats{display:flex;justify-content:center;gap:44px;margin-top:40px}.stats b{display:block;font-size:28px}.stats span{color:#64748b;font-size:14px}
.card{background:#fff;border:1px solid #e2e8f0;border-radius:18px;box-shadow:0 10px 30px -15px #0f172a22;padding:26px}
.app{display:grid;grid-template-columns:1.1fr .9fr;gap:24px;margin-top:12px;align-items:start}
.form h2{margin:0 0 14px;font-size:20px}.form h3{font-size:15px;margin:16px 0 8px}
label{display:block;font-size:13px;font-weight:600;color:#475569;margin-bottom:10px}
input,textarea,select{width:100%;margin-top:4px;padding:10px 12px;border:1px solid #cbd5e1;border-radius:10px;font:15px Inter,sans-serif;background:#fff}
input:focus,textarea:focus,select:focus{outline:2px solid #7dd3fc;border-color:#0ea5e9}
.g2{display:grid;grid-template-columns:1fr 1fr;gap:12px}.g3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:12px}
.tabs{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px}
.tab{border:1px solid #e2e8f0;background:#f8fafc;border-radius:999px;padding:8px 14px;font:600 13px Inter,sans-serif;cursor:pointer;color:#475569}
.tab.on{background:#0ea5e9;border-color:#0ea5e9;color:#fff}
.preview{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:520px;text-align:center}
#qrbox{width:280px;height:280px;display:flex;align-items:center;justify-content:center;background:#fff;border:1px solid #e2e8f0;border-radius:16px;padding:12px;position:relative}
#qrbox canvas,#qrbox img{max-width:100%;height:auto;border-radius:8px}
.wm{position:absolute;bottom:8px;left:0;right:0;font-size:10px;color:#94a3b8;pointer-events:none}
.actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-top:16px;justify-content:center}
.muted{color:#64748b;font-size:14px}.swatch{width:100%;height:42px;padding:4px;cursor:pointer}
.sec{margin-top:90px}.c{text-align:center}h2.c{font-size:36px;letter-spacing:-.02em}
.plans{display:grid;grid-template-columns:1fr 1fr;gap:24px;max-width:720px;margin:30px auto}.plan{position:relative}.plan ul{padding-left:18px;color:#475569}
.price{font-size:40px;font-weight:800}.price small{font-size:16px;color:#64748b;font-weight:500}.hot{border:2px solid #0ea5e9}
.tag{position:absolute;top:-12px;right:20px;background:#0ea5e9;color:#fff;font-size:12px;padding:4px 10px;border-radius:99px}
.trust{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.trust p{color:#64748b;margin:6px 0 0}
details{background:#fff;border:1px solid #e2e8f0;border-radius:14px;padding:16px 20px;max-width:760px;margin:10px auto}summary{font-weight:600;cursor:pointer}
.foot{text-align:center;color:#94a3b8;padding:60px 0 40px;font-size:14px}.foot a{color:#64748b}
.guide{max-width:760px;margin:40px auto;padding:0 20px 60px}.guide h1{font-size:36px;margin:20px 0}.guide p,.guide li{color:#334155;font-size:17px}
@media(max-width:860px){.app,.plans,.trust{grid-template-columns:1fr}.nav nav a{margin-left:10px;font-size:13px}.stats{gap:20px}.g3{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.nav nav a:nth-child(n+3){display:none}.g2,.g3{grid-template-columns:1fr}.card{padding:18px}#qrbox{width:240px;height:240px}}