:root{--bg:#F1F2FA;--surface:#fff;--ink:#24205A;--ink-deep:#1A1745;--ink-soft:#565378;--muted:#8B89A6;--line:#E4E6F2;--accent:#E15750;--accent-deep:#991B1B;--info-bg:#EBEDFB;--grad-i:linear-gradient(180deg,#E15750 0%,#C24A45 55%,#6E2F3F 100%);--r:18px;--shadow:0 10px 30px rgba(36,32,90,.07)}
*{box-sizing:border-box;margin:0}
html{scroll-behavior:smooth;scroll-padding-top:90px}
body{font-family:Poppins,system-ui,sans-serif;font-size:15px;color:var(--ink);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:var(--accent-deep);text-decoration:underline;text-underline-offset:3px}a:hover{color:var(--ink)}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}
.wrap{width:min(1100px,100% - 32px);margin-inline:auto}
.skip{position:absolute;left:-999px;background:var(--ink);color:#fff;padding:10px 16px;z-index:100;border-radius:0 0 12px 0}.skip:focus{left:0;top:0}
header{position:sticky;top:0;z-index:40;background:rgba(255,255,255,.94);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.bar{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:68px}
.brand{text-decoration:none;color:var(--ink);display:inline-flex;align-items:baseline}
.wordmark{font-weight:600;font-size:26px;letter-spacing:-.5px;line-height:1}
.wordmark .i{background:var(--grad-i);-webkit-background-clip:text;background-clip:text;color:transparent}
.wordmark-tag{font-size:16px;font-weight:500;color:var(--muted);margin-left:7px}
.back{font-size:13px;font-weight:600;text-decoration:none;color:var(--ink);border:1px solid var(--line);border-radius:999px;padding:8px 18px;background:#fff}.back:hover{border-color:var(--ink)}
.layout{display:grid;grid-template-columns:260px 1fr;gap:32px;padding:40px 0 0;align-items:start}
.toc{position:sticky;top:90px;background:var(--surface);border-radius:var(--r);box-shadow:var(--shadow);padding:20px;font-size:13px;max-height:calc(100vh - 110px);overflow:auto}
.toc b{display:block;font-size:11px;letter-spacing:1.6px;text-transform:uppercase;color:var(--muted);margin-bottom:10px}
.toc ol{padding-left:18px;display:grid;gap:6px}.toc a{text-decoration:none;color:var(--ink-soft)}.toc a:hover{color:var(--accent-deep)}
article{background:var(--surface);border-radius:var(--r);box-shadow:var(--shadow);padding:clamp(24px,5vw,56px);min-width:0}
h1{font-size:clamp(26px,4vw,38px);line-height:1.2;letter-spacing:-.02em;margin-bottom:8px}
.meta{color:var(--ink-soft);font-size:13px;margin-bottom:28px}
h2{font-size:19px;margin:36px 0 10px;letter-spacing:-.01em;line-height:1.3}
h3{font-size:15px;margin:20px 0 6px}
p,li{color:var(--ink-soft)}p{margin-bottom:12px}
ul,ol.n{margin:0 0 14px 22px;display:grid;gap:6px}
strong{color:var(--ink)}
.box{background:var(--info-bg);border-radius:12px;padding:16px 18px;margin:16px 0;font-size:14px}.box p:last-child{margin:0}
mark.pend{background:#FFF1C2;color:#5C4400;padding:1px 6px;border-radius:6px;font-weight:600}
table{width:100%;border-collapse:collapse;font-size:13.5px;margin:12px 0 18px;display:block;overflow-x:auto}
th,td{border:1px solid var(--line);padding:9px 12px;text-align:left;vertical-align:top}th{background:var(--surface);color:var(--ink)}
footer{margin-top:56px;background:var(--ink-deep);color:rgba(255,255,255,.75);padding:32px 0;font-size:13px}
footer a{color:#fff}footer .links{display:flex;flex-wrap:wrap;gap:18px;margin-bottom:12px}
@media(max-width:860px){.layout{grid-template-columns:1fr}.toc{position:static;max-height:none}}
@media print{header,.toc,footer,.skip{display:none}body{background:#fff}article{box-shadow:none;padding:0}.layout{display:block}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}