:root{--ink:#1f2527;--muted:#667277;--paper:#f5f0e6;--accent:#7b4528;--panel:#fff;--line:#ded7ca}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:Georgia,"Times New Roman",serif}
a{color:var(--accent)}.topbar{position:sticky;top:0;z-index:10;background:rgba(245,240,230,.96);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.topbar-inner{max-width:1120px;margin:auto;padding:10px 18px;display:flex;gap:14px;align-items:center;justify-content:space-between}.brand{font-weight:700;text-decoration:none;color:var(--ink)}.navlink{font-family:Arial,sans-serif;font-size:14px;text-decoration:none}
main{max-width:1120px;margin:0 auto;padding:28px 18px 64px}.hero{max-width:780px}.hero h1{font-size:clamp(32px,6vw,58px);line-height:1;margin:.15em 0}.subtitle{color:var(--muted);font:18px/1.5 Arial,sans-serif}.toc{margin-top:32px;display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:12px}.toc a{display:block;background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:15px 16px;text-decoration:none;color:var(--ink);box-shadow:0 1px 2px rgba(0,0,0,.03)}.toc a:hover{border-color:#bcae9b;transform:translateY(-1px)}.toc strong{display:block;font-size:18px}.toc small{font:13px Arial,sans-serif;color:var(--muted)}
.search{width:100%;max-width:620px;padding:12px 14px;border-radius:10px;border:1px solid #cfc5b6;font:16px Arial,sans-serif;background:#fff}.chapter-head{margin-bottom:22px}.chapter-head h1{font-size:clamp(28px,5vw,48px);margin:.2em 0}.page-card{background:white;border:1px solid var(--line);border-radius:12px;margin:0 auto 24px;overflow:hidden;box-shadow:0 5px 20px rgba(0,0,0,.06);max-width:1050px;scroll-margin-top:72px}.page-card img{display:block;width:100%;height:auto;background:#eee}.page-meta{display:flex;justify-content:space-between;gap:12px;padding:9px 12px;font:13px Arial,sans-serif;color:var(--muted);border-top:1px solid #eee}.jumpnav{display:flex;gap:8px;flex-wrap:wrap;margin:18px 0 24px}.jumpnav a{font:14px Arial,sans-serif;background:#fff;border:1px solid var(--line);border-radius:999px;padding:7px 10px;text-decoration:none}.footer{font:13px Arial,sans-serif;color:var(--muted);margin-top:30px;text-align:center}.hidden{display:none!important}
@media(max-width:650px){main{padding:18px 10px 48px}.page-card{border-radius:7px}.topbar-inner{padding:9px 12px}.page-meta{font-size:12px}.toc{grid-template-columns:1fr}}