:root{--brand:#167CFF;--ink:#0b1220;--muted:#5b6373;--bg:#f7f8fb;--card:#fff;--line:#e7e9f1;--radius:16px}
*{box-sizing:border-box}html,body{height:100%}
body{margin:0;font:16px/1.6 system-ui,-apple-system,Segoe UI,Roboto,Inter,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg)}
.wrap{max-width:1100px;margin:0 auto;padding:24px 20px 56px}
a{color:var(--brand)}
.site-header{display:flex;align-items:center;gap:20px;margin-bottom:16px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:12px}
.brand-mark{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:10px;background:radial-gradient(100% 100% at 70% 10%, #49a2ff 0%, var(--brand) 70%);color:#fff;font-weight:900}
.brand-name{font-weight:900;letter-spacing:.2px;background:linear-gradient(90deg,var(--ink),#2b3447);-webkit-background-clip:text;background-clip:text;color:transparent}
.nav{margin-left:auto;display:flex;gap:14px;flex-wrap:wrap}
.nav a{color:var(--ink);text-decoration:none;border-bottom:1px solid transparent}
.nav a:hover{border-bottom-color:currentColor}
.hero h1{font-size:clamp(2rem,3.8vw,3.25rem);line-height:1.15;margin:.25rem 0 .5rem;font-weight:900}
.hero p{color:var(--muted);max-width:70ch;margin:0}
.disclosure{background:#fff;border:1px dashed var(--line);padding:10px 12px;border-radius:12px;margin:14px 0;color:#3d4451}
.grid{display:grid;grid-template-columns:1fr;gap:20px;margin:22px 0 30px}
@media (min-width:860px){.grid{grid-template-columns:1fr 1fr}}
.card{display:block;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 2px 12px rgba(13,16,23,.03);transition:.2s transform,.2s box-shadow,.2s border-color}
.card:hover{transform:translateY(-2px);box-shadow:0 10px 28px rgba(13,16,23,.08);border-color:#dfe3ee}
.card-body{padding:22px}
.site-footer{display:flex;align-items:center;gap:10px;border-top:1px solid var(--line);padding-top:18px}
.badge{display:inline-grid;place-items:center;width:24px;height:24px;border-radius:7px;background:var(--brand);color:#fff;font-weight:900;font-size:.95rem}
.spacer{margin-left:auto}.muted{color:#7a8191;text-decoration:none}
.compare{width:100%;border-collapse:collapse;background:#fff;border:1px solid #e7e9f1;border-radius:16px;overflow:hidden;margin:16px 0}
.compare th,.compare td{padding:10px 12px;border-bottom:1px solid #eef1f6;text-align:left;font-size:0.95rem}
.compare thead th{background:#f5f8ff;font-weight:700}
.compare tr:last-child td{border-bottom:none}
.badges,.actions{display:flex;gap:8px;flex-wrap:wrap;margin:8px 0}
.badge-tag{font:600 12px system-ui;background:#eef2ff;border:1px solid #d9e2ff;padding:2px 8px;border-radius:999px;color:#2f4aa0}
.buy{display:inline-flex;align-items:center;gap:8px;background:var(--brand);color:#fff;text-decoration:none;padding:8px 12px;border-radius:12px;font-weight:700}
.paid-link{font-size:.9rem;color:#7a8191}
.diagram{background:#fff;border:1px solid #e7e9f1;border-radius:16px;padding:14px;margin:16px 0}
.diagram .box{fill:#fff;stroke:#dfe3ee;stroke-width:2;rx:10}
.diagram .label{font:600 14px/1.2 system-ui,-apple-system,Segoe UI,Roboto,Arial}
.diagram .sub{font:12px/1.2 system-ui,-apple-system,Segoe UI,Roboto,Arial;fill:#647089}
.diagram .wire{fill:none;stroke:#167CFF;stroke-width:3}
.diagram .earc{stroke-dasharray:6 6}
.diagram .tag{fill:#eef4ff;stroke:#cfe0ff;stroke-width:1;rx:8}
.diagram .tag-text{font:600 12px system-ui,-apple-system,Segoe UI,Roboto,Arial;fill:#245cbb}
.callout{background:linear-gradient(180deg,#ffffff,#f4f7ff);border:1px solid #e7e9f1;border-radius:14px;padding:12px 14px;margin:16px 0}
.steps ol,.ladder ol{counter-reset:step;padding-left:0;list-style:none}
.steps li,.ladder li{counter-increment:step;background:#fff;border:1px solid #e7e9f1;border-radius:12px;padding:12px 14px;margin:10px 0}
.steps li::before,.ladder li::before{content:counter(step);display:inline-grid;place-items:center;width:24px;height:24px;margin-right:8px;border-radius:7px;background:#167CFF;color:#fff;font-weight:800}