:root{
  --blue:#0a4b8c;--blue-deep:#073a6e;--blue-700:#0d57a3;--blue-soft:#eaf1f9;--blue-line:#d3e1f0;
  --ink:#0f2030;--ink-2:#243646;--muted:#5d6e7d;--line:#e4eaf1;--bg:#f5f8fc;--white:#fff;
  --maxw:820px;--shadow-md:0 10px 40px rgba(10,75,140,.10);
  font-synthesis:none;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"Heebo",system-ui,sans-serif;color:var(--ink);background:var(--white);line-height:1.7;-webkit-font-smoothing:antialiased}
h1,h2,h3,.f-title{font-family:"Assistant",system-ui,sans-serif;line-height:1.18;letter-spacing:-.01em;font-weight:800;color:var(--ink)}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1180px;margin:0 auto;padding:0 28px}

/* header */
header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.85);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:74px;gap:16px}
.brand{display:flex;align-items:center;gap:12px}
.brand .mark{width:40px;height:40px;border-radius:11px;background:linear-gradient(135deg,var(--blue),var(--blue-700));display:grid;place-items:center;flex:none}
.brand .mark svg{width:22px;height:22px}
.brand .name{font-family:"Assistant";font-weight:800;font-size:1.02rem;letter-spacing:-.01em;line-height:1.1;color:var(--ink)}
.brand .name span{display:block;font-weight:500;font-size:.74rem;color:var(--muted)}
.back{display:inline-flex;align-items:center;gap:.5em;font-family:"Assistant";font-weight:700;font-size:.96rem;padding:.6em 1.2em;border:1.5px solid var(--blue-line);border-radius:999px;color:var(--blue);transition:.18s}
.back:hover{background:var(--blue-soft);border-color:var(--blue);text-decoration:none}
.back svg{width:1.05em;height:1.05em}

/* page head */
.page-head{background:radial-gradient(120% 120% at 85% 0%,#eef4fb 0%,rgba(245,248,252,0) 55%),linear-gradient(180deg,#f7fafd,#eef3f9);border-bottom:1px solid var(--blue-line)}
.page-head .wrap{padding-top:54px;padding-bottom:46px}
.page-head .eyebrow{font-family:"Assistant";font-weight:700;font-size:.8rem;letter-spacing:.16em;color:var(--blue);text-transform:uppercase}
.page-head h1{font-size:clamp(1.9rem,4.4vw,2.9rem);margin:.5rem 0 .4rem}
.page-head .updated{color:var(--muted);font-size:.96rem}

/* doc body */
.doc{padding:54px 0 30px}
.doc .wrap{max-width:var(--maxw)}
.doc h2{font-size:1.4rem;margin:2.2rem 0 .7rem;padding-top:.4rem}
.doc h2:first-of-type{margin-top:0}
.doc h3{font-size:1.1rem;font-weight:700;margin:1.4rem 0 .4rem;color:var(--ink-2)}
.doc p{color:var(--ink-2);margin-bottom:1rem}
.doc ul{list-style:none;margin:0 0 1.1rem;padding:0;display:flex;flex-direction:column;gap:.55rem}
.doc li{position:relative;padding-inline-start:1.5em;color:var(--ink-2)}
.doc li::before{content:"";position:absolute;inset-inline-start:0;top:.62em;width:7px;height:7px;border-radius:2px;background:var(--blue)}
.doc strong{color:var(--ink);font-weight:600}
.callout{background:var(--blue-soft);border:1px solid var(--blue-line);border-radius:14px;padding:18px 20px;margin:1.4rem 0;color:var(--ink-2);font-size:.97rem}
.callout strong{color:var(--blue)}
.contact-box{border:1px solid var(--line);border-radius:14px;padding:20px 22px;margin-top:1.2rem;background:#fbfcfe}
.contact-box .row{display:flex;gap:.5em;margin-bottom:.4rem;font-size:1rem}
.contact-box .row:last-child{margin-bottom:0}
.contact-box .k{font-family:"Assistant";font-weight:700;color:var(--ink);min-width:120px}

/* footer */
footer{background:#0b1a28;color:#aab8c6;padding:40px 0 26px;margin-top:40px}
.foot-row{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:14px;padding-bottom:22px;border-bottom:1px solid rgba(255,255,255,.1)}
.foot-row .name{font-family:"Assistant";font-weight:800;color:#fff;font-size:1.05rem}
.foot-links{display:flex;gap:22px;flex-wrap:wrap}
.foot-links a{color:#aab8c6;font-size:.95rem}
.foot-links a:hover{color:#fff;text-decoration:none}
.foot-bottom{padding-top:18px;font-size:.85rem;color:#7c8c9b;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:14px}
.foot-social{display:flex;gap:10px}
.foot-social a{width:36px;height:36px;border-radius:9px;border:1px solid rgba(255,255,255,.15);display:grid;place-items:center;color:#9fb0bf;transition:.18s ease}
.foot-social a:hover{background:var(--blue);border-color:var(--blue);color:#fff;text-decoration:none}
.foot-social svg{width:17px;height:17px;fill:currentColor}

@media (max-width:560px){
  .wrap{padding:0 18px}
  .brand .name span{display:none}
  .doc{padding:38px 0 20px}
  .foot-row{flex-direction:column;align-items:flex-start}
}