:root{--blue:#0b3aa8;--blue2:#1a57d6;--sky:#e8f0ff;--orange:#f59e0b;--tx:#10224a;--mu:#5a6a8c;--bg:#f5f8ff;--card:#fff;--bd:#d9e3fb;--sh:0 10px 30px rgba(11,58,168,.10);color-scheme:light}
@media(prefers-color-scheme:dark){:root{--tx:#e8eeff;--mu:#a3b1d4;--bg:#0c1426;--card:#142040;--bd:#26365f;--sky:#18284d;--sh:0 10px 30px rgba(0,0,0,.35);color-scheme:dark}}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:84px}
body{margin:0;background:var(--bg);color:var(--tx);font:17px/1.7 system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}
a{color:var(--blue2)}@media(prefers-color-scheme:dark){a{color:#7fb0ff}}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
header.nav{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--card) 88%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--bd)}
.nav .wrap{display:flex;align-items:center;gap:16px;height:64px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--blue);font-weight:800;font-size:20px}
@media(prefers-color-scheme:dark){.brand{color:#fff}}
.brand img{height:36px;width:auto;background:#fff;border-radius:10px;padding:3px}
.nav nav{margin-left:auto;display:flex;gap:6px;flex-wrap:wrap}
.nav nav a{padding:8px 14px;border-radius:999px;text-decoration:none;color:var(--tx);font-size:15px;font-weight:600}
.nav nav a:hover{background:var(--sky)}.nav nav a.on{background:var(--blue);color:#fff}
.hero{background:linear-gradient(135deg,#0b3aa8 0%,#1a57d6 62%,#2f7bff 100%);color:#fff;position:relative;overflow:hidden}
.hero:before,.hero:after{content:"";position:absolute;border-radius:50%;background:rgba(255,255,255,.08)}
.hero:before{width:420px;height:420px;right:-120px;top:-160px}.hero:after{width:260px;height:260px;left:-80px;bottom:-120px;background:rgba(245,158,11,.22)}
.hero .wrap{position:relative;display:grid;grid-template-columns:1.2fr .8fr;gap:30px;align-items:center;padding-top:64px;padding-bottom:72px}
.hero h1{font-size:clamp(34px,5vw,54px);line-height:1.1;margin:0 0 10px}.hero .tag{font-style:italic;font-weight:700;color:#ffd48a;margin:0 0 14px;font-size:19px}
.hero p.lead{font-size:19px;opacity:.95;margin:0 0 26px;max-width:560px}
.badge{background:#fff;border-radius:32px;padding:26px;box-shadow:0 24px 60px rgba(0,0,0,.25);justify-self:center;max-width:340px;width:100%}.badge img{width:100%;display:block}
.btns{display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-block;padding:13px 22px;border-radius:14px;font-weight:700;text-decoration:none;background:#fff;color:var(--blue);box-shadow:0 6px 18px rgba(0,0,0,.15)}
.btn.o{background:transparent;color:#fff;border:2px solid rgba(255,255,255,.7);box-shadow:none}
.btn:hover{transform:translateY(-1px)}
section.blk{padding:60px 0}.blk h2{font-size:30px;margin:0 0 8px;color:var(--blue)}@media(prefers-color-scheme:dark){.blk h2{color:#fff}}
.blk .sub{color:var(--mu);margin:0 0 30px;max-width:640px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(290px,1fr));gap:18px}
.card{background:var(--card);border:1px solid var(--bd);border-radius:20px;padding:22px;box-shadow:var(--sh)}
.card .ic{width:52px;height:52px;border-radius:16px;background:var(--sky);display:flex;align-items:center;justify-content:center;font-size:26px;margin-bottom:12px}
.card h3{margin:0 0 6px;font-size:19px}.card p{margin:0;color:var(--mu);font-size:16px}
.alt{background:var(--sky)}
.pts{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px}
.pt{display:flex;gap:14px}.pt b{display:block}.pt span.n{flex:none;width:40px;height:40px;border-radius:50%;background:var(--blue);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800}
.docs{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:18px}
a.doc{display:block;text-decoration:none;color:inherit;background:var(--card);border:1px solid var(--bd);border-radius:20px;padding:24px;box-shadow:var(--sh);transition:.15s}
a.doc:hover{transform:translateY(-3px);border-color:var(--blue2)}a.doc h3{margin:0 0 6px;color:var(--blue)}@media(prefers-color-scheme:dark){a.doc h3{color:#fff}}
a.doc p{margin:0 0 12px;color:var(--mu)}a.doc span{font-weight:700;color:var(--blue2)}
.phead{background:linear-gradient(135deg,#0b3aa8,#1a57d6);color:#fff;padding:44px 0}
.phead h1{margin:0 0 6px;font-size:clamp(28px,4vw,40px);line-height:1.2}.phead p{margin:0;opacity:.9}
.layout{display:grid;grid-template-columns:250px 1fr;gap:34px;padding:34px 0 60px;align-items:start}
.toc{position:sticky;top:84px;background:var(--card);border:1px solid var(--bd);border-radius:18px;padding:16px;font-size:14.5px;max-height:calc(100vh - 110px);overflow:auto}
.toc summary{font-weight:700;cursor:pointer;margin-bottom:8px;list-style:none}.toc summary::-webkit-details-marker{display:none}.toc summary:after{content:" ▾";color:var(--mu)}.toc a{display:block;padding:5px 8px;border-radius:8px;text-decoration:none;color:var(--mu);line-height:1.35}
.toc a:hover,.toc a.on{background:var(--sky);color:var(--blue)}@media(prefers-color-scheme:dark){.toc a:hover,.toc a.on{color:#fff}}
article{background:var(--card);border:1px solid var(--bd);border-radius:22px;padding:34px;box-shadow:var(--sh);min-width:0}
article h2{font-size:23px;margin:36px 0 10px;color:var(--blue);display:flex;gap:10px;align-items:baseline}@media(prefers-color-scheme:dark){article h2{color:#fff}}
article h2:first-of-type{margin-top:6px}article h2 i{font-style:normal;flex:none;background:var(--sky);color:var(--blue);border-radius:10px;padding:0 10px;font-size:16px}
@media(prefers-color-scheme:dark){article h2 i{color:#fff}}
article h3{font-size:18px;margin:22px 0 6px}
article ul{padding-left:22px}article li{margin:4px 0}
.callout{background:var(--sky);border-left:5px solid var(--orange);border-radius:14px;padding:18px 20px;margin:0 0 10px}
.callout b{display:block;margin-bottom:6px;font-size:18px}.callout ul{margin:0}
.warn{background:#fff7e6;border:1px solid #ffd48a;color:#5b3b00;border-radius:14px;padding:14px 16px;margin:14px 0}
@media(prefers-color-scheme:dark){.warn{background:#3a2a08;border-color:#7a5712;color:#ffe3a8}}
.tw{overflow-x:auto;margin:12px 0}table{border-collapse:collapse;width:100%;min-width:560px;font-size:15.5px}
th,td{border:1px solid var(--bd);padding:10px 12px;text-align:left;vertical-align:top}th{background:var(--sky)}
.meta{font-size:14px;color:var(--mu)}
footer{background:#0a2f8c;color:#dbe6ff;padding:34px 0;font-size:15px}footer a{color:#fff}
footer .wrap{display:flex;flex-wrap:wrap;gap:18px;justify-content:space-between;align-items:center}
footer .links{display:flex;gap:18px;flex-wrap:wrap}
@media(max-width:860px){.hero .wrap{grid-template-columns:1fr;padding-top:44px;padding-bottom:50px}.badge{max-width:240px;order:-1}
.layout{grid-template-columns:1fr}.toc{position:static;max-height:none}article{padding:22px}.nav .wrap{height:auto;padding-top:10px;padding-bottom:10px;flex-wrap:wrap}.nav nav{margin-left:0;width:100%;flex-wrap:nowrap;overflow-x:auto}.nav nav a{padding:7px 12px;font-size:14.5px;white-space:nowrap}}
@media print{header.nav,.toc,footer,.hero .btns{display:none}.layout{display:block}article{border:0;box-shadow:none;padding:0}body{background:#fff;color:#000}}