:root{
  --brand:#0a5cd5;--brand-d:#0847a6;--brand-l:#e8f0fe;--ink:#0f172a;--ink-2:#334155;--muted:#64748b;
  --line:#e2e8f0;--bg:#ffffff;--bg-2:#f6f8fb;--ok:#0f8a4b;--ok-l:#e7f6ee;--warn:#b45309;--pix:#32bcad;
  --r:14px;--r-s:10px;--shadow:0 1px 2px rgba(15,23,42,.06),0 8px 24px rgba(15,23,42,.06);
  --font:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.6;font-size:17px}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand)}
a:hover{color:var(--brand-d)}
h1,h2,h3{line-height:1.2;letter-spacing:-.01em;margin:0 0 .6em}
h1{font-size:clamp(1.9rem,4.2vw,2.9rem);font-weight:800}
h2{font-size:clamp(1.45rem,2.8vw,2rem);font-weight:800;margin-top:1.6em}
h3{font-size:1.18rem;font-weight:700;margin-top:1.3em}
p{margin:0 0 1em}
.wrap{max-width:1140px;margin:0 auto;padding:0 16px}
.narrow{max-width:780px}
.skip{position:absolute;left:-999px}.skip:focus{left:16px;top:8px;background:#fff;padding:8px;z-index:99}
.muted{color:var(--muted)}.small{font-size:.9rem}.center{text-align:center}

/* topbar + header */
.topbar{background:var(--ink);color:#cbd5e1;font-size:.85rem}
.topbar .wrap{display:flex;gap:18px;justify-content:center;padding:6px 16px;flex-wrap:wrap}
.topbar span{display:inline-flex;align-items:center;gap:6px}
.hdr{position:sticky;top:0;z-index:40;background:rgba(255,255,255,.96);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.hdr .wrap{display:flex;align-items:center;gap:20px;height:64px}
.logo{display:flex;align-items:center;gap:8px;font-weight:800;font-size:1.15rem;color:var(--ink);text-decoration:none;white-space:nowrap}
.logo b{color:var(--brand)}
.nav{display:flex;gap:4px;margin-left:auto;align-items:center}
.nav a{color:var(--ink-2);text-decoration:none;font-weight:600;font-size:.95rem;padding:8px 10px;border-radius:8px}
.nav a:hover,.nav a[aria-current=page]{background:var(--bg-2);color:var(--brand)}
.nav .btn{margin-left:8px;color:#fff}
.menu-btn{display:none;margin-left:auto;background:none;border:1px solid var(--line);border-radius:8px;padding:8px 10px;font:inherit;cursor:pointer}
@media (max-width:960px){
  .menu-btn{display:inline-flex}
  .nav{display:none;position:absolute;top:64px;left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;padding:8px 16px 16px;border-bottom:1px solid var(--line);box-shadow:var(--shadow)}
  .nav.open{display:flex}
  .nav .btn{margin:8px 0 0}
}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:var(--brand);color:#fff;border:0;border-radius:10px;padding:12px 20px;font:inherit;font-weight:700;text-decoration:none;cursor:pointer;transition:background .15s,transform .15s}
.btn:hover{background:var(--brand-d);color:#fff}
.btn:active{transform:translateY(1px)}
.btn-lg{padding:15px 26px;font-size:1.05rem}
.btn-ghost{background:#fff;color:var(--brand);border:1.5px solid var(--brand)}
.btn-ghost:hover{background:var(--brand-l);color:var(--brand-d)}
.btn-block{width:100%}
.btn[disabled]{opacity:.6;cursor:wait}

/* hero */
.hero{background:linear-gradient(180deg,#f3f7ff 0%,#fff 100%);border-bottom:1px solid var(--line)}
.hero .wrap{display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center;padding-top:48px;padding-bottom:48px}
.hero .lead{font-size:1.15rem;color:var(--ink-2);max-width:40em}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap;margin:22px 0 18px}
.ticks{display:flex;gap:18px;flex-wrap:wrap;list-style:none;padding:0;margin:0;color:var(--ink-2);font-size:.95rem}
.ticks li{display:flex;align-items:center;gap:6px}
.ticks svg,.list-check svg{color:var(--ok);flex:none}
.hero-img{justify-self:center;max-width:360px}
@media (max-width:860px){.hero .wrap{grid-template-columns:1fr;padding-top:28px;padding-bottom:32px}.hero-img{max-width:240px;order:-1}}

.eyebrow{display:inline-block;font-size:.8rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--brand);background:var(--brand-l);padding:4px 10px;border-radius:999px;margin-bottom:14px}

/* sections */
.sec{padding:56px 0}
.sec-alt{background:var(--bg-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{max-width:720px;margin:0 auto 32px;text-align:center}
.sec-head h2{margin-top:0}
.grid{display:grid;gap:20px}
.g2{grid-template-columns:repeat(2,1fr)}.g3{grid-template-columns:repeat(3,1fr)}.g4{grid-template-columns:repeat(4,1fr)}
@media (max-width:900px){.g3,.g4{grid-template-columns:repeat(2,1fr)}}
@media (max-width:640px){.g2,.g3,.g4{grid-template-columns:1fr}}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:22px}
.card h3{margin-top:0}
.feat svg{color:var(--brand);margin-bottom:8px}
.feat h3{font-size:1.05rem;margin:0 0 6px}
.feat p{margin:0;color:var(--ink-2);font-size:.97rem}

/* product card */
.pcard{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:18px;padding:24px;box-shadow:var(--shadow)}
.pcard-top{display:flex;gap:18px;align-items:center;margin-bottom:12px}
.pcard-top img{width:110px;height:110px;object-fit:contain}
.pcard h3{margin:0 0 4px;font-size:1.25rem}
.badge{display:inline-block;font-size:.75rem;font-weight:700;padding:3px 9px;border-radius:999px;background:var(--ok-l);color:var(--ok)}
.badge-b{background:var(--brand-l);color:var(--brand)}
.price{font-size:2.1rem;font-weight:800;letter-spacing:-.02em;font-variant-numeric:tabular-nums;margin:6px 0 2px}
.price small{font-size:1rem;font-weight:600;color:var(--muted)}
.coupon-hint{color:var(--ok);font-weight:600;font-size:.95rem;margin-bottom:14px}
.list-check{list-style:none;padding:0;margin:0 0 18px}
.list-check li{display:flex;gap:8px;align-items:flex-start;margin:6px 0;color:var(--ink-2)}
.list-check li svg{margin-top:4px}
.pay-note{display:flex;align-items:center;gap:6px;justify-content:center;font-size:.88rem;color:var(--muted);margin-top:10px}

/* steps */
.steps{counter-reset:s;list-style:none;padding:0;margin:0;display:grid;gap:16px}
.steps li{counter-increment:s;position:relative;padding:18px 18px 18px 64px;background:#fff;border:1px solid var(--line);border-radius:var(--r)}
.steps li::before{content:counter(s);position:absolute;left:18px;top:18px;width:32px;height:32px;border-radius:50%;background:var(--brand-l);color:var(--brand);font-weight:800;display:grid;place-items:center}
.steps strong{display:block}

/* article */
.crumbs{font-size:.88rem;color:var(--muted);padding:16px 0 0}
.crumbs ol{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:6px}
.crumbs li+li::before{content:"›";margin-right:6px;color:#94a3b8}
.crumbs a{color:var(--muted);text-decoration:none}.crumbs a:hover{color:var(--brand)}
.art{padding:24px 0 56px}
.art-head{margin-bottom:24px}
.art-meta{font-size:.9rem;color:var(--muted)}
.answer{background:var(--brand-l);border-left:4px solid var(--brand);border-radius:0 var(--r-s) var(--r-s) 0;padding:16px 20px;margin:20px 0 28px}
.answer>strong:first-child{display:block;color:var(--brand-d);margin-bottom:4px;font-size:.85rem;text-transform:uppercase;letter-spacing:.05em}
.answer p:last-child{margin:0}
.prose ul,.prose ol{padding-left:1.3em}
.prose li{margin:.35em 0}
.prose table{width:100%;border-collapse:collapse;margin:1em 0 1.6em;font-size:.95rem;display:block;overflow-x:auto}
.prose th,.prose td{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}
.prose th{background:var(--bg-2)}
.prose code,kbd{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.88em;background:var(--bg-2);border:1px solid var(--line);border-radius:6px;padding:1px 6px}
.prose pre{background:#0f172a;color:#e2e8f0;border-radius:var(--r-s);padding:14px 16px;overflow-x:auto;font-size:.9rem}
.prose pre code{background:none;border:0;color:inherit;padding:0}
.toc{background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r);padding:16px 20px;margin:0 0 28px}
.toc strong{display:block;margin-bottom:6px}
.toc ol{margin:0;padding-left:1.2em}
.callout{border:1px solid var(--line);border-radius:var(--r);padding:18px 20px;margin:24px 0;background:#fff}
.callout-warn{border-color:#fcd34d;background:#fffbeb}
.cta-box{display:flex;gap:20px;align-items:center;background:linear-gradient(135deg,#0a5cd5,#0847a6);color:#fff;border-radius:18px;padding:24px;margin:32px 0}
.cta-box img{width:96px;height:96px;object-fit:contain;background:#fff;border-radius:12px;padding:6px;flex:none}
.cta-box h3{margin:0 0 4px;color:#fff}
.cta-box p{margin:0 0 12px;color:#dbe7ff}
.cta-box .btn{background:#fff;color:var(--brand-d)}
.cta-box .btn:hover{background:#eef4ff}
@media (max-width:560px){.cta-box{flex-direction:column;text-align:center}}

/* faq */
.faq details{background:#fff;border:1px solid var(--line);border-radius:var(--r-s);margin:0 0 10px;padding:0 18px}
.faq summary{cursor:pointer;font-weight:700;padding:16px 0;list-style:none;display:flex;justify-content:space-between;gap:12px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:1.4rem;line-height:1;color:var(--brand)}
.faq details[open] summary::after{content:"–"}
.faq details>div{padding:0 0 16px;color:var(--ink-2)}
.faq details>div p:last-child{margin:0}

/* guides list */
.gcard{display:flex;flex-direction:column;text-decoration:none;color:inherit;transition:border-color .15s,transform .15s}
.gcard:hover{border-color:var(--brand);transform:translateY(-2px);color:inherit}
.gcard .tag{font-size:.78rem;font-weight:700;color:var(--brand);text-transform:uppercase;letter-spacing:.05em}
.gcard h3{margin:6px 0 8px;font-size:1.1rem}
.gcard p{margin:0;color:var(--ink-2);font-size:.95rem}

/* compare table */
.cmp{width:100%;border-collapse:collapse;background:#fff;border-radius:var(--r);overflow:hidden;border:1px solid var(--line)}
.cmp th,.cmp td{padding:12px 14px;border-bottom:1px solid var(--line);text-align:left}
.cmp th{background:var(--bg-2)}
.tbl-wrap{overflow-x:auto}

/* footer */
.ftr{background:var(--ink);color:#cbd5e1;padding:48px 0 24px;font-size:.95rem}
.ftr a{color:#e2e8f0;text-decoration:none}.ftr a:hover{color:#fff;text-decoration:underline}
.ftr-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:28px}
.ftr h2{font-size:.85rem;text-transform:uppercase;letter-spacing:.08em;color:#94a3b8;margin:0 0 12px}
.ftr ul{list-style:none;padding:0;margin:0}.ftr li{margin:7px 0}
.ftr .logo{color:#fff;margin-bottom:10px}
.legal{border-top:1px solid #1e293b;margin-top:32px;padding-top:18px;font-size:.82rem;color:#94a3b8}
@media (max-width:860px){.ftr-grid{grid-template-columns:1fr 1fr}}
@media (max-width:520px){.ftr-grid{grid-template-columns:1fr}}

.wa{position:fixed;right:16px;bottom:16px;z-index:45;display:inline-flex;align-items:center;gap:8px;background:#25d366;color:#fff;font-weight:700;text-decoration:none;padding:12px 16px;border-radius:999px;box-shadow:0 8px 24px rgba(0,0,0,.18)}
.wa:hover{color:#fff;background:#1fb457}

/* checkout dialog */
dialog.co{border:0;border-radius:18px;padding:0;width:min(440px,calc(100vw - 24px));box-shadow:0 30px 80px rgba(2,6,23,.35);color:var(--ink)}
dialog.co::backdrop{background:rgba(15,23,42,.55)}
.co-head{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--line)}
.co-head h2{font-size:1.1rem;margin:0}
.co-x{background:none;border:0;font-size:1.6rem;line-height:1;cursor:pointer;color:var(--muted);padding:4px 8px}
.co-body{padding:20px}
.co-sum{display:flex;justify-content:space-between;align-items:center;background:var(--bg-2);border-radius:var(--r-s);padding:12px 14px;margin-bottom:16px;font-weight:600}
.co-sum .v{font-size:1.25rem;font-weight:800;font-variant-numeric:tabular-nums}
.co-sum s{color:var(--muted);font-weight:500;font-size:.9rem;margin-right:6px}
.fld{margin-bottom:12px}
.fld label{display:block;font-weight:600;font-size:.9rem;margin-bottom:4px}
.fld input{width:100%;font:inherit;padding:11px 12px;border:1.5px solid var(--line);border-radius:10px;background:#fff}
.fld input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-l)}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.co-err{color:#b91c1c;font-size:.9rem;margin:8px 0 0;min-height:1.2em}
.qr{display:block;width:240px;height:240px;margin:0 auto 12px;border:1px solid var(--line);border-radius:12px}
.copy{display:flex;gap:8px;margin:10px 0}
.copy input{flex:1;min-width:0;font:inherit;font-size:.8rem;padding:10px;border:1.5px solid var(--line);border-radius:10px;background:var(--bg-2)}
.co-wait{display:flex;align-items:center;justify-content:center;gap:8px;color:var(--ink-2);font-size:.95rem;margin-top:8px}
.spin{width:16px;height:16px;border:2.5px solid var(--brand-l);border-top-color:var(--brand);border-radius:50%;animation:sp 1s linear infinite}
@keyframes sp{to{transform:rotate(360deg)}}
.co-ok{text-align:center}
.co-ok svg{color:var(--ok)}
.co-steps{font-size:.9rem;color:var(--ink-2);padding-left:1.2em;margin:12px 0}