:root{--navy:#102a43;--ink:#1e2b3d;--slate:#47566b;--muted:#64748b;--line:#e6ebf1;--blue:#2563eb;--paper:#fff;--panel:#f6f8fb}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:-apple-system,"SF Pro Display","Inter","Segoe UI",Helvetica,Arial,sans-serif;color:var(--ink);line-height:1.62;background:var(--paper);-webkit-font-smoothing:antialiased}
a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline}
nav{position:sticky;top:0;background:rgba(255,255,255,.9);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);z-index:10}
.nav-in{max-width:820px;margin:0 auto;padding:15px 24px;display:flex;align-items:center;gap:11px}
.nav-in img{height:21px}.nav-in .sep{width:1px;height:19px;background:var(--line)}.nav-in .pm{font-weight:750;color:var(--navy);font-size:15.5px}
.nav-in .back{margin-left:auto;font-size:14px;font-weight:600;color:var(--slate)}
.doc{max-width:760px;margin:0 auto;padding:52px 24px 88px}
.eyebrow{font-size:12.5px;font-weight:750;letter-spacing:.13em;text-transform:uppercase;color:var(--blue)}
h1{font-size:clamp(30px,4vw,40px);font-weight:800;letter-spacing:-.02em;color:var(--navy);margin:12px 0 8px}
.updated{color:var(--muted);font-size:14px;margin-bottom:34px}
.intro{font-size:17px;color:var(--slate);margin-bottom:22px;line-height:1.6}
h2{font-size:20px;font-weight:750;color:var(--navy);margin:40px 0 12px;letter-spacing:-.01em}
h3{font-size:15.5px;font-weight:700;color:var(--ink);margin:22px 0 8px}
p{margin-bottom:14px;color:var(--slate);font-size:15.5px}
ul{margin:0 0 16px 20px;color:var(--slate);font-size:15.5px}li{margin-bottom:7px}
.box{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:18px 22px;margin:22px 0}
.box p:last-child,.box ul:last-child{margin-bottom:0}
strong{color:var(--ink);font-weight:650}
.toc{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:18px 22px;margin:26px 0 34px}
.toc h4{font-size:11.5px;font-weight:750;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-bottom:10px}
.toc ol{margin:0;padding-left:20px;columns:2;column-gap:30px;font-size:14px}
.toc a{color:var(--slate)}
footer{border-top:1px solid var(--line);padding:30px 24px;text-align:center;color:var(--muted);font-size:13.5px}
footer a{color:var(--muted)}
@media(max-width:600px){.toc ol{columns:1}}