:root{--ink:#17243c;--muted:#627087;--blue:#4258cc;--line:#e0e7f0;--bg:#f4f6fa}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);font:16px/1.75 system-ui,-apple-system,"Segoe UI",Arial,sans-serif;background:var(--bg)}
a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline}
.shell{max-width:1120px;margin:0 auto;padding:0 24px}
.site-header{background:white;border-bottom:1px solid var(--line)}
.top{display:flex;min-height:74px;align-items:center;justify-content:space-between;gap:16px}
.brand{font-weight:800;font-size:21px;color:#17243c;letter-spacing:-.045em}.brand:hover{text-decoration:none}
.maple,.ca{color:#c73252}.maple{margin-right:8px}
nav{display:flex;align-items:center;gap:22px;font-size:14px;font-weight:650}
.signup{display:inline-flex;background:var(--blue);color:white!important;padding:10px 17px;border-radius:9px;font-size:14px;font-weight:700;text-decoration:none!important}
.signup:hover{background:#3449b1}
.crumb{font-size:12px;color:#64748b;padding:25px 0 0}
.intro{padding:28px 0 38px;max-width:860px}
.eyebrow{display:inline-block;color:#4258cc;font-size:12px;letter-spacing:.035em;font-weight:800;text-transform:uppercase}
h1{font-size:clamp(31px,4.2vw,48px);letter-spacing:-.05em;line-height:1.18;margin:14px 0 18px}
.lead{font-size:18px;color:#55637b;max-width:800px;line-height:1.7;margin:0}
.byline{font-size:12px;color:#718096;margin-top:20px}
.guide-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;padding-bottom:48px}
.guide{padding:26px;background:white;border:1px solid var(--line);border-radius:15px;box-shadow:0 2px 10px rgba(20,35,65,.025)}
.guide span{font-size:12px;color:#65748a;font-weight:650}
.guide h2{font-size:22px;line-height:1.36;letter-spacing:-.025em;margin:10px 0}
.guide h2 a{color:var(--ink)}.guide p{font-size:14px;color:var(--muted);line-height:1.75}.read{font-size:14px;font-weight:750}
.article-grid{display:grid;grid-template-columns:minmax(0,720px) 280px;gap:42px;align-items:start}
.article-body{background:white;border:1px solid var(--line);border-radius:15px;padding:34px}
.article-body section{padding:14px 0}
.article-body h2{font-size:25px;line-height:1.35;letter-spacing:-.035em;margin:20px 0 12px}
.article-body p{font-size:15px;color:#384860;margin:12px 0;line-height:1.9}
.toc{background:#f7f9fc;border:1px solid #e7ecf5;border-radius:11px;padding:19px 22px;font-size:13px}
.toc ol{margin:8px 0 0;padding-left:18px}.toc li{margin:6px 0}
.sidebox{position:sticky;top:22px;background:white;border:1px solid var(--line);border-radius:12px;padding:20px}
.sidebox h3{font-size:15px;margin:0 0 10px}.sidebox ul{padding-left:18px;font-size:13px;line-height:1.6}.sidebox li{margin:12px 0}
.notice{font-size:13px;color:#475569;background:#f4f7fd;padding:18px;border-left:3px solid var(--blue);margin:28px 0}
.end-cta{margin:25px 0 60px;background:#eaf0ff;border:1px solid #d7e1fb;border-radius:15px;padding:25px 28px}
.end-cta h2{font-size:23px;line-height:1.35;margin:0 0 8px}.end-cta p{font-size:14px;color:#53637a;line-height:1.8;max-width:780px}
.site-footer{border-top:1px solid var(--line);background:white;padding:23px 0;margin-top:30px;color:#68758a;font-size:12px}
.site-footer .shell{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
@media(max-width:820px){.article-grid{grid-template-columns:1fr}.article-side{order:2}.sidebox{position:static}.guide-grid{grid-template-columns:1fr}}
@media(max-width:550px){.shell{padding:0 16px}.top{min-height:65px}.brand{font-size:17px}nav{gap:10px;font-size:12px}nav .signup{padding:8px}.article-body{padding:20px}.intro{padding:25px 0}.guide{padding:20px}h1{font-size:30px}.lead{font-size:16px}}