:root{--purple:#6517d8;--orange:#ff6b00;--green:#0bb783;--ink:#101426;--muted:#5b6678;--line:#e3e8f2;--soft:#f7f9ff;--amber:#b25c00}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:#fff;line-height:1.6}
.wrap{max-width:820px;margin:0 auto;padding:0 20px}
header{border-bottom:1px solid var(--line);background:#fff;position:sticky;top:0;z-index:5}
.nav{height:62px;display:flex;align-items:center;justify-content:space-between}
.logo{font-family:Georgia,"Times New Roman",serif;font-size:24px;font-weight:800}
.logo .tu{color:var(--purple)}.logo .mk{color:var(--orange)}.logo .sv{color:#121212}.logo sup{font-size:.45em}
.back{font-size:14px;font-weight:700;color:var(--purple);text-decoration:none}
h1{font-size:clamp(24px,4vw,32px);font-weight:900;margin:30px 0 6px;letter-spacing:-.01em}
.meta{color:var(--muted);font-size:13px;margin-bottom:8px}
.draftnote{background:#fff7ed;border:1px solid #fed7aa;color:var(--amber);border-radius:8px;padding:10px 14px;font-size:13px;margin:14px 0 22px}
h2{font-size:19px;color:var(--purple);margin:28px 0 10px;padding-top:6px}
h3{font-size:16px;margin:18px 0 6px}
p,li{font-size:15px;color:#1f2a3d;margin:8px 0}
ul,ol{margin:8px 0 8px 22px}
table{width:100%;border-collapse:collapse;margin:12px 0;font-size:14px}
th,td{border:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}
th{background:var(--soft);font-weight:700;font-size:13px}
blockquote{border-left:4px solid var(--orange);background:var(--soft);padding:10px 14px;margin:14px 0;border-radius:0 8px 8px 0;font-size:14px;color:#26334d}
.todo{background:#fff3cd;color:var(--amber);font-weight:700;padding:0 5px;border-radius:4px;font-size:.92em}
a{color:var(--purple)}
hr{border:0;border-top:1px solid var(--line);margin:22px 0}
footer{border-top:1px solid var(--line);margin-top:40px;padding:24px 0;color:var(--muted);font-size:13px}
footer a{font-weight:700;margin-right:14px}
.toc{background:var(--soft);border:1px solid var(--line);border-radius:10px;padding:14px 18px;margin:18px 0}
.toc a{display:inline-block;margin:3px 10px 3px 0;font-size:13px}
@media print{header{position:static}.back,.draftnote{display:none}}