:root{--bg:#f5f7fa;--paper:#fff;--ink:#161214;--ink2:#6e5f64;--muted:#b8a6af;--line:#e2e7ee;--brand:#b45309;--brand2:#3f1128;--shadow:0 16px 38px rgba(34, 24, 28,.07)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:radial-gradient(circle at 95% 0,rgba(92,29,61,.055),transparent 28rem),radial-gradient(circle at 0 30rem,rgba(180,83,9,.05),transparent 28rem),var(--bg);color:var(--ink);font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Arial,sans-serif;line-height:1.5;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}.wrap{width:min(1200px,calc(100% - 32px));margin:auto}.site-header{height:66px;position:sticky;top:0;z-index:90;background:#fffffff5;backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}.header-inner{height:100%;display:flex;align-items:center;gap:16px}.brand{display:flex;gap:11px;align-items:center;text-decoration:none}.brand-mark{width:39px;height:39px;border-radius:11px;background:linear-gradient(145deg,#22181c,#5c1d3d);display:grid;place-items:center;color:#fff;font-weight:900;font-family:Times New Roman,"Cambria Math",serif;font-size:1.65rem;font-style:italic;line-height:1}.brand-name{display:block;font-weight:850}.brand-sub{display:block;color:var(--muted);font-size:.68rem}.hero{padding:48px 0 16px;text-align:center}.hero h1{font-size:clamp(1.6rem,4vw,2.4rem);font-weight:900;margin:0 0 8px;letter-spacing:-.02em}.hero p{color:var(--ink2);font-size:1.05rem;max-width:640px;margin:0 auto}.topics{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px;padding:32px 0 64px}.topic-card{display:flex;align-items:center;justify-content:space-between;padding:18px 22px;background:var(--paper);border:1px solid var(--line);border-radius:14px;transition:all .18s ease;box-shadow:0 2px 6px #0000000a}.topic-card:hover{border-color:var(--brand);box-shadow:var(--shadow);transform:translateY(-2px)}.topic-name{font-weight:700;font-size:.95rem}.topic-badge{background:#edf2f7;color:var(--muted);font-size:.72rem;font-weight:700;padding:4px 10px;border-radius:999px;white-space:nowrap}.breadcrumbs{padding:16px 0 0;font-size:.82rem;color:var(--muted)}.breadcrumbs a{text-decoration:underline;text-underline-offset:2px}.breadcrumbs span{margin:0 6px}footer{padding:32px 0;text-align:center;font-size:.78rem;color:var(--muted);border-top:1px solid var(--line)}footer a{text-decoration:underline;text-underline-offset:2px}