.chapter-card[data-astro-cid-oddomfxo]{position:relative;display:flex;min-height:100%;flex-direction:column;border:1px solid color-mix(in srgb,var(--color-ink-muted) 15%,transparent);border-radius:8px;background:color-mix(in srgb,var(--color-paper) 96%,var(--color-ink) 4%);overflow:hidden;transition:border-color .2s,box-shadow .2s}.chapter-card[data-astro-cid-oddomfxo]:before{content:"";position:absolute;inset:0 auto 0 0;width:3px;background:var(--chapter-accent);opacity:.75}.chapter-card[data-astro-cid-oddomfxo]:hover{border-color:color-mix(in srgb,var(--chapter-accent) 45%,transparent);box-shadow:0 10px 28px #1a1a2e14}.chapter-card__main[data-astro-cid-oddomfxo]{display:flex;flex:1;min-height:15rem;flex-direction:column;padding:1.5rem 1.5rem 1.25rem 1.75rem}.chapter-card__header[data-astro-cid-oddomfxo]{display:flex;align-items:center;gap:.75rem;margin-bottom:1.25rem}.chapter-card__number[data-astro-cid-oddomfxo]{display:inline-flex;align-items:center;justify-content:center;width:2.5rem;height:2.5rem;flex:0 0 2.5rem;border:1px solid color-mix(in srgb,var(--chapter-accent) 28%,transparent);border-radius:5px;background:color-mix(in srgb,var(--chapter-accent) 7%,transparent);font-family:var(--font-mono);font-size:.875rem;font-weight:700;color:var(--chapter-accent);letter-spacing:0}.chapter-card__meta[data-astro-cid-oddomfxo]{display:flex;flex-wrap:wrap;align-items:center;gap:.375rem;color:var(--color-ink-muted);font-family:var(--font-mono);font-size:.625rem;opacity:.58}.chapter-card__title[data-astro-cid-oddomfxo]{margin:0 0 .625rem;color:var(--color-ink);font-family:var(--font-sans);font-size:1.0625rem;font-weight:700;line-height:1.55;transition:color .2s}.chapter-card[data-astro-cid-oddomfxo]:hover .chapter-card__title[data-astro-cid-oddomfxo]{color:var(--chapter-accent)}.chapter-card__description[data-astro-cid-oddomfxo]{margin:0;color:var(--color-ink-muted);font-size:.8125rem;line-height:1.75}.chapter-card__action[data-astro-cid-oddomfxo]{display:flex;align-items:center;justify-content:space-between;gap:1rem;margin-top:auto;padding-top:1.25rem;color:var(--color-ink-muted);font-family:var(--font-sans);font-size:.75rem;font-weight:600;transition:color .2s}.chapter-card__action[data-astro-cid-oddomfxo] svg[data-astro-cid-oddomfxo]{transition:transform .2s}.chapter-card[data-astro-cid-oddomfxo]:hover .chapter-card__action[data-astro-cid-oddomfxo]{color:var(--chapter-accent)}.chapter-card[data-astro-cid-oddomfxo]:hover .chapter-card__action[data-astro-cid-oddomfxo] svg[data-astro-cid-oddomfxo]{transform:translate(3px)}.chapter-card__resources[data-astro-cid-oddomfxo]{padding:.75rem 1.5rem 1rem 1.75rem;border-top:1px solid color-mix(in srgb,var(--color-ink-muted) 12%,transparent);background:color-mix(in srgb,var(--color-paper-warm) 75%,transparent)}@media(max-width:639px){.chapter-card__main[data-astro-cid-oddomfxo]{min-height:0;padding:1.25rem 1.25rem 1rem 1.5rem}.chapter-card__action[data-astro-cid-oddomfxo]{margin-top:1.25rem}}@media(prefers-reduced-motion:reduce){.chapter-card[data-astro-cid-oddomfxo]:hover .chapter-card__action[data-astro-cid-oddomfxo] svg[data-astro-cid-oddomfxo]{transform:none}}[data-theme=dark] a[data-astro-cid-oddomfxo][href*=bilibili]:not([href*=xhs]){background:#38bdf826;color:#5ba3e8}[data-theme=dark] a[data-astro-cid-oddomfxo][href*=bilibili]:not([href*=xhs]):hover{background:#38bdf840}[data-theme=dark] a[data-astro-cid-oddomfxo][href*=xiaohongshu],[data-theme=dark] a[data-astro-cid-oddomfxo][href*=xhs]{background:#ef444426;color:#f87171}[data-theme=dark] a[data-astro-cid-oddomfxo][href*=xiaohongshu]:hover,[data-theme=dark] a[data-astro-cid-oddomfxo][href*=xhs]:hover{background:#ef444440}[data-theme=dark] .group[data-astro-cid-oddomfxo]:hover{box-shadow:0 4px 12px #00000040}.section-banner[data-astro-cid-ytvomcwp]{position:relative;margin-top:4rem;margin-bottom:2rem;padding:1.75rem 2rem 1.75rem 2.5rem;background:var(--sb-bg);border-radius:0 12px 12px 0;overflow:hidden}.section-banner__bar[data-astro-cid-ytvomcwp]{position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--sb-accent);border-radius:0 2px 2px 0}.section-banner__content[data-astro-cid-ytvomcwp]{display:flex;align-items:center;gap:1.5rem}.section-banner__num[data-astro-cid-ytvomcwp]{font-family:Georgia,serif;font-size:2.25rem;font-weight:400;line-height:1;color:var(--sb-accent);opacity:.25;flex-shrink:0;min-width:2.5rem;text-align:center}.section-banner__text[data-astro-cid-ytvomcwp]{flex:1;min-width:0}.section-banner__title[data-astro-cid-ytvomcwp]{font-size:1.375rem;font-weight:800;letter-spacing:0;color:var(--color-ink);line-height:1.2;margin:0}.section-banner__title-row[data-astro-cid-ytvomcwp]{display:flex;align-items:center;gap:.75rem}.section-banner__count[data-astro-cid-ytvomcwp]{font-family:var(--font-mono);font-size:.6875rem;color:var(--color-ink-muted);opacity:.55}.section-banner__subtitle[data-astro-cid-ytvomcwp]{margin:.375rem 0 0;font-size:.875rem;color:var(--color-ink-muted);line-height:1.5}@media(max-width:640px){.section-banner[data-astro-cid-ytvomcwp]{padding:1.25rem 1.25rem 1.25rem 1.75rem;margin-top:3rem}.section-banner__num[data-astro-cid-ytvomcwp]{font-size:1.75rem;min-width:2rem}.section-banner__title[data-astro-cid-ytvomcwp]{font-size:1.125rem}}[data-theme=dark] .section-banner[data-astro-cid-ytvomcwp]{background:linear-gradient(135deg,#ffffff05,#ffffff0a)}[data-theme=dark] .section-banner__num[data-astro-cid-ytvomcwp]{color:var(--color-gold);opacity:.35}.rail-link[data-astro-cid-g3mmlgot]{border-left:2px solid transparent;margin-left:-2px}.rail-link[data-astro-cid-g3mmlgot].is-active{color:var(--color-ink);border-left-color:var(--color-gold)}.chapter-rail-mobile[data-astro-cid-g3mmlgot]{position:sticky;top:4rem;z-index:30;margin:0 -1.5rem 1.5rem;background:var(--color-paper);border-bottom:1px solid var(--color-gold-pale)}.chapter-rail-mobile__bar[data-astro-cid-g3mmlgot]{display:flex;align-items:center;justify-content:space-between;width:100%;padding:.75rem 1.5rem;color:var(--color-ink);background:transparent;border:none;cursor:pointer}.chapter-rail-mobile__panel[data-astro-cid-g3mmlgot]{max-height:60vh;overflow-y:auto;padding:.5rem 1.5rem 1rem;border-top:1px solid var(--color-gold-pale)}.rail-link[data-astro-cid-g3mmlgot]:focus-visible{outline:none;color:var(--color-ink);border-left-color:var(--color-gold);background:var(--color-gold-pale);border-radius:2px}