body.home { overflow: auto; background: radial-gradient(1200px 600px at 70% -10%, #1a2436 0%, #05070d 60%); }
.home main { max-width: 980px; margin: 0 auto; padding: 48px 20px 40px; }
.home .brand { font-size: 18px; margin-bottom: 18px; }
.home h1 { font-size: 34px; line-height: 1.15; margin: 0 0 12px; max-width: 760px; }
.home .lead { color: var(--muted); font-size: 16px; max-width: 680px; margin: 0 0 30px; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; margin-bottom: 36px; }
.card { display: block; padding: 20px; border: 1px solid var(--line); border-radius: 12px; background: var(--panel); color: var(--text); text-decoration: none; transition: border-color 0.2s, transform 0.2s; }
.card:hover { border-color: var(--orange); transform: translateY(-2px); }
.card .k { color: var(--orange-2); font-size: 12px; font-weight: 700; }
.card h2 { margin: 4px 0 8px; font-size: 22px; }
.card p { color: #cdd5df; margin: 0 0 14px; }
.card dl { display: flex; gap: 18px; margin: 0; flex-wrap: wrap; }
.card dt { color: var(--muted); font-size: 12px; }
.card dd { margin: 0; font-weight: 800; color: var(--orange-2); }
.math h2 { font-size: 20px; }
.math table { width: 100%; border-collapse: collapse; margin-bottom: 12px; }
.math td { padding: 8px 6px; border-bottom: 1px solid var(--line); vertical-align: top; }
.math td:first-child { color: var(--muted); width: 22%; }
.math td:last-child { text-align: right; white-space: nowrap; }
.math p { color: #cdd5df; }
.src { margin-top: 30px; color: var(--muted); font-size: 12.5px; }