:root { color-scheme: light; --ink:#182230; --muted:#596579; --line:#dce3ec; --panel:#fff; --soft:#f6f8fb; --accent:#4556d9; --accent-soft:#eef0ff; --shadow:0 14px 40px rgba(31,43,66,.08); }
* { box-sizing: border-box; }
html { scroll-behavior:smooth; }
body { margin:0; background:var(--soft); color:var(--ink); font:16px/1.72 Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
a { color:var(--accent); text-decoration-thickness:1px; text-underline-offset:3px; }
a:hover { color:#2736aa; }
.skip { position:absolute; left:12px; top:-52px; z-index:3; background:#182230; color:#fff; padding:10px 14px; border-radius:8px; }
.skip:focus { top:12px; }
.site-header { background:rgba(255,255,255,.92); border-bottom:1px solid var(--line); backdrop-filter:blur(12px); position:sticky; top:0; z-index:2; }
.header-inner,.page-shell,.footer-inner { max-width:1180px; margin:auto; padding-left:28px; padding-right:28px; }
.header-inner { min-height:68px; display:flex; align-items:center; justify-content:space-between; gap:20px; }
.brand { color:var(--ink); font-weight:800; letter-spacing:-.04em; font-size:20px; text-decoration:none; }
.brand span { color:var(--accent); }
.top-nav { display:flex; gap:18px; align-items:center; font-size:14px; }
.top-nav a { color:#445065; text-decoration:none; }
.top-nav a:hover { color:var(--accent); }
.hero { padding:72px 0 42px; border-bottom:1px solid var(--line); background:radial-gradient(circle at 75% 0, #e5e8ff 0, transparent 30%), #fff; }
.eyebrow { color:var(--accent); font-size:12px; font-weight:800; letter-spacing:.12em; text-transform:uppercase; }
h1,h2,h3 { color:#111a2a; line-height:1.18; letter-spacing:-.025em; }
h1 { font-size:clamp(34px,5vw,56px); max-width:830px; margin:12px 0 18px; }
h2 { font-size:25px; margin:0 0 12px; padding-top:8px; }
h3 { font-size:18px; margin:28px 0 8px; }
.lede { max-width:800px; color:#4d5a6d; font-size:18px; margin:0; }
.updated { display:inline-block; margin-top:24px; color:#68758a; font-size:14px; }
.layout { display:grid; grid-template-columns:245px minmax(0, 1fr); gap:56px; padding-top:46px; padding-bottom:72px; }
.toc { position:sticky; top:96px; align-self:start; border-left:1px solid var(--line); padding-left:18px; }
.toc strong { display:block; font-size:12px; letter-spacing:.08em; text-transform:uppercase; color:#4b5870; margin-bottom:10px; }
.toc a { display:block; color:#667287; font-size:13px; line-height:1.35; text-decoration:none; padding:6px 0; }
.toc a:hover { color:var(--accent); }
article { min-width:0; }
article section { background:var(--panel); padding:30px 34px; border:1px solid var(--line); border-radius:14px; box-shadow:0 2px 4px rgba(25,35,53,.02); margin-bottom:18px; scroll-margin-top:100px; }
p { margin:0 0 15px; }
ul,ol { padding-left:22px; margin:12px 0 16px; }
li { margin:7px 0; }
.notice { border-left:4px solid var(--accent); background:var(--accent-soft); padding:16px 18px; border-radius:0 10px 10px 0; color:#33406f; margin:18px 0; }
.table-wrap { overflow-x:auto; margin:18px 0; }
table { width:100%; min-width:620px; border-collapse:collapse; font-size:14px; }
th,td { text-align:left; vertical-align:top; padding:12px; border:1px solid var(--line); }
th { background:#f6f7fb; color:#2a3447; font-weight:700; }
.contact-card { background:#151e32; color:#edf1fa; border-radius:14px; padding:26px 30px; margin-top:26px; }
.contact-card h2 { color:#fff; padding:0; }
.contact-card a { color:#bfc7ff; }
.site-footer { background:#fff; border-top:1px solid var(--line); color:#657186; font-size:14px; }
.footer-inner { padding-top:35px; padding-bottom:35px; display:flex; justify-content:space-between; gap:26px; flex-wrap:wrap; }
.footer-links { display:flex; gap:16px; flex-wrap:wrap; }
@media (max-width:820px) { .top-nav { display:none; } .hero { padding-top:52px; } .layout { display:block; padding-top:28px; } .toc { position:static; border:1px solid var(--line); border-radius:12px; padding:18px; margin-bottom:25px; background:#fff; } .toc a { display:inline-block; margin-right:14px; } article section { padding:24px 20px; } .header-inner,.page-shell,.footer-inner { padding-left:18px; padding-right:18px; } }