:root{--bg:#FAFAFA;--surface:#fff;--ink:#0F1B2E;--muted:#6B7280;--line:#E7E9EE;--orange:#E8491D;--amber:#F5A623;--blue:#1478A8;--navy:#0F1B2E;--grad:linear-gradient(135deg,#F5A623,#E8491D)}
@media (prefers-color-scheme:dark){:root{--bg:#0b1220;--surface:#121b2d;--ink:#e8edf4;--muted:#9aa6b8;--line:#243049;--blue:#4cc3f0}}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:16px}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.7 'Manrope',system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif}
h1,h2,.brand{font-family:'Sora','Manrope',system-ui,sans-serif}
header.site{background:var(--navy);color:#fff;border-bottom:3px solid transparent;border-image:var(--grad) 1}
header.site .in{max-width:860px;margin:0 auto;padding:12px 18px;display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;color:#fff;text-decoration:none;font-weight:800;font-size:19px}
.brand img{width:34px;height:34px;border-radius:50%;object-fit:cover}
.back{margin-left:auto;color:#cfd8e6;font-size:14px;text-decoration:none}.back:hover{color:#fff}
.wrap{max-width:860px;margin:0 auto;padding:18px 18px 40px}
nav.tabs{display:flex;gap:8px;overflow-x:auto;padding:4px 0 14px;-webkit-overflow-scrolling:touch}
nav.tabs a{flex:none;padding:7px 14px;border:1px solid var(--line);border-radius:999px;background:var(--surface);color:var(--muted);font-size:13.5px;font-weight:600;text-decoration:none;white-space:nowrap}
nav.tabs a.on{background:var(--grad);color:#fff;border-color:transparent}
article{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:22px 22px 14px}
@media(max-width:560px){article{padding:16px 14px 8px;border-radius:12px}}
h1{font-size:28px;line-height:1.25;margin:2px 0 4px;font-weight:800}
h2{font-size:18.5px;margin:30px 0 4px;font-weight:700;color:var(--ink)}
h2::before{content:"";display:inline-block;width:4px;height:16px;border-radius:2px;background:var(--grad);margin-right:9px;vertical-align:-2px}
p,li{margin:8px 0}ul{padding-left:22px}li::marker{color:var(--orange)}
.meta{color:var(--muted);font-size:13.5px}
a{color:var(--blue)}
.box{background:rgba(245,166,35,.12);border:1px solid rgba(245,166,35,.45);border-left:4px solid var(--amber);border-radius:10px;padding:10px 14px;margin:16px 0}
details.toc{border:1px solid var(--line);border-radius:10px;padding:8px 14px;margin:14px 0 6px;background:var(--bg)}
details.toc summary{cursor:pointer;font-weight:700;font-size:14px}
details.toc ol{margin:8px 0 4px;padding-left:20px;font-size:14px;columns:1}
details.toc li{margin:3px 0}
footer{max-width:860px;margin:0 auto;padding:6px 18px 36px;color:var(--muted);font-size:13px;text-align:center}
footer a{color:var(--muted)}
@media print{header.site,nav.tabs,details.toc,footer .links{display:none}body{background:#fff;color:#000}article{border:0;padding:0}}