:root { --bg:#FAF7F3; --card:#fff; --line:rgba(10,31,68,.10); --text:#20283A; --muted:rgba(32,40,58,.72); --blue:#0B5BE6; --dark:#0A1F44; --container:1080px; }
    *{box-sizing:border-box}
    body{margin:0;font-family:'Manrope',system-ui,sans-serif;color:var(--text);line-height:1.62;background:radial-gradient(circle at 12% 8%,rgba(11,91,230,.09),transparent 30%),radial-gradient(circle at 82% 0,rgba(215,138,45,.10),transparent 28%),var(--bg)}
    .container{width:min(var(--container),calc(100% - 32px));margin:0 auto}
    .topbar{position:sticky;top:0;z-index:20;border-bottom:1px solid var(--line);background:rgba(250,247,243,.92);backdrop-filter:saturate(130%) blur(8px)}
    .topbar-inner{height:70px;display:flex;align-items:center;justify-content:space-between;gap:16px}
    .brand{text-decoration:none;color:var(--dark);font:700 18px 'Manrope',sans-serif}
    .btn{text-decoration:none;color:#fff;background:var(--blue);padding:10px 14px;border-radius:12px;font-weight:700;font-size:14px}
    main{padding:30px 0 56px}
    .hero{border:1px solid var(--line);border-radius:22px;background:linear-gradient(180deg,#fff,#F6F9FF);padding:22px;margin-bottom:14px}
    .eyebrow{display:inline-flex;align-items:center;padding:6px 10px;border-radius:999px;border:1px solid rgba(11,91,230,.16);color:var(--blue);font-size:12px;font-weight:700;margin-bottom:8px}
    h1{margin:0;font:700 clamp(24px,5vw,38px)/1.12 'Manrope',sans-serif;color:var(--dark)}
    .meta{margin-top:10px;color:var(--muted);font-size:14px}
    .switch{display:flex;gap:8px;margin:10px 0 12px}
    .switch button{border:1px solid var(--line);background:#fff;border-radius:10px;padding:8px 12px;font-weight:700;color:var(--dark);cursor:pointer}
    .switch button.active{background:var(--blue);border-color:var(--blue);color:#fff}
    .toc-wrap{margin:0 0 12px}
    .toc{border:1px solid var(--line);border-radius:14px;background:#fff;padding:10px}
    .toc h2{margin:0 0 8px;font:700 13px/1.2 'Manrope',sans-serif;color:var(--dark)}
    .toc a{display:block;padding:6px 8px;border-radius:8px;text-decoration:none;color:rgba(10,31,68,.78);font-size:12px;font-weight:600}
    .toc a:hover{background:rgba(11,91,230,.08);color:var(--blue)}
    .doc{border:1px solid var(--line);border-radius:20px;background:var(--card);padding:20px}
    .lang{display:none}
    .lang.active{display:block}
    .lang p{margin:0 0 10px;color:var(--muted);font-size:14px;white-space:normal;text-wrap:pretty}
    .source{margin-top:18px;padding-top:12px;border-top:1px dashed var(--line);font-size:13px;color:var(--muted)}
    .source a{color:var(--blue)}