h1[data-astro-cid-mtnw4pzq]{font-size:1.7rem;font-weight:700;letter-spacing:-.03em;margin-bottom:.25rem}.page-subtitle[data-astro-cid-mtnw4pzq]{color:var(--text-sub);font-size:.85rem;margin-bottom:2rem}.toc[data-astro-cid-mtnw4pzq]{background:#fafcfe;border:1px solid var(--border);border-radius:var(--radius);padding:1.2rem 1.8rem;margin:0 auto 2.5rem;max-width:440px}.toc-title[data-astro-cid-mtnw4pzq]{font-size:1rem;font-weight:700;color:var(--blue);text-align:center;margin-bottom:.8rem;letter-spacing:.08em}.toc[data-astro-cid-mtnw4pzq] ol[data-astro-cid-mtnw4pzq]{list-style:none;counter-reset:toc;padding:0;margin:0}.toc[data-astro-cid-mtnw4pzq] ol[data-astro-cid-mtnw4pzq]>li[data-astro-cid-mtnw4pzq]{counter-increment:toc;margin-bottom:.4rem}.toc[data-astro-cid-mtnw4pzq] ol[data-astro-cid-mtnw4pzq]>li[data-astro-cid-mtnw4pzq]:before{content:counter(toc) ".";color:var(--blue);font-weight:700;font-size:.85rem;margin-right:.4rem}.toc[data-astro-cid-mtnw4pzq] ol[data-astro-cid-mtnw4pzq]>li[data-astro-cid-mtnw4pzq]>a[data-astro-cid-mtnw4pzq]{color:#333;text-decoration:none;font-size:.95rem}.toc[data-astro-cid-mtnw4pzq] ol[data-astro-cid-mtnw4pzq]>li[data-astro-cid-mtnw4pzq]>a[data-astro-cid-mtnw4pzq]:hover{color:var(--blue);text-decoration:underline}.section-label[data-astro-cid-mtnw4pzq]{font-size:.72rem;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--text-sub);margin:2.5rem 0 .8rem;padding-bottom:.4rem;border-bottom:1px solid var(--border)}.video-section[data-astro-cid-mtnw4pzq]{text-align:center}.video-section[data-astro-cid-mtnw4pzq] h2[data-astro-cid-mtnw4pzq]{font-size:1.5rem;font-weight:700;margin-bottom:.3rem}.video-sub[data-astro-cid-mtnw4pzq]{color:var(--text-sub);font-size:.95rem;margin-bottom:1.2rem}.video-outer[data-astro-cid-mtnw4pzq]{display:flex;justify-content:center}.video-wrapper[data-astro-cid-mtnw4pzq]{width:100%;max-width:640px;aspect-ratio:16 / 9;border-radius:var(--radius);overflow:hidden;background:#111}.video-placeholder[data-astro-cid-mtnw4pzq]{background:var(--bg-soft);border:1.5px dashed var(--border);border-radius:var(--radius);padding:2rem 1rem;color:var(--text-sub);font-size:.88rem;text-align:center}.quiz-section[data-astro-cid-mtnw4pzq]{text-align:center;margin-bottom:.5rem}.quiz-section[data-astro-cid-mtnw4pzq] h2[data-astro-cid-mtnw4pzq]{font-size:1.5rem;font-weight:700;margin-bottom:.2rem}.quiz-section[data-astro-cid-mtnw4pzq] h3[data-astro-cid-mtnw4pzq]{font-size:.95rem;font-weight:400;color:var(--text-sub)}.quiz-inner[data-astro-cid-mtnw4pzq]{display:flex;flex-direction:column;align-items:center}.quiz-inner[data-astro-cid-mtnw4pzq]>div[data-astro-cid-mtnw4pzq]{width:100%;max-width:600px}.watch-box[data-astro-cid-mtnw4pzq]{background:#f0f9fe;border:1.5px solid var(--blue-md);border-radius:12px;padding:1.2rem 1.5rem;max-width:600px;margin:0 auto}.watch-box[data-astro-cid-mtnw4pzq] p[data-astro-cid-mtnw4pzq]{font-size:.9rem;line-height:1.8;color:var(--text);margin-bottom:.8rem}.watch-btn[data-astro-cid-mtnw4pzq]{display:inline-flex;align-items:center;gap:.4rem;background:var(--blue);color:#fff;text-decoration:none;font-weight:700;font-size:.9rem;padding:.6rem 1.2rem;border-radius:8px;transition:opacity .15s}.watch-btn[data-astro-cid-mtnw4pzq]:hover{opacity:.88}.watch-note[data-astro-cid-mtnw4pzq]{font-size:.78rem;color:var(--text-sub);margin-top:.7rem}.back-link[data-astro-cid-mtnw4pzq]{display:inline-flex;align-items:center;gap:.4rem;margin-top:2rem;padding:.6rem 1.2rem;border:1.5px solid var(--border);border-radius:8px;background:#fff;color:var(--text-sub);text-decoration:none;font-size:.85rem;transition:border-color .15s,color .15s}.back-link[data-astro-cid-mtnw4pzq]:hover{border-color:var(--blue);color:var(--blue)}.back-to-top[data-astro-cid-mtnw4pzq]{position:fixed;bottom:2rem;right:max(1rem,calc(50% - 490px + 1rem));background:var(--blue);color:#fff;border:none;border-radius:50%;width:44px;height:44px;font-size:1.1rem;cursor:pointer;box-shadow:0 4px 12px #00a0e966;display:flex;align-items:center;justify-content:center;opacity:0;pointer-events:none;transition:opacity .2s,transform .2s;z-index:200}.back-to-top[data-astro-cid-mtnw4pzq].visible{opacity:1;pointer-events:auto}.back-to-top[data-astro-cid-mtnw4pzq]:hover{transform:translateY(-2px)}@media(max-width:480px){h1[data-astro-cid-mtnw4pzq]{font-size:1.2rem}}.intro[data-astro-cid-mtnw4pzq]{background:#fff8e6;border:2px solid #f5c842;border-radius:12px;padding:1rem 1.4rem;margin-bottom:2rem;font-size:.92rem;line-height:1.8}.intro[data-astro-cid-mtnw4pzq] strong[data-astro-cid-mtnw4pzq]{color:#8a6800}.lv-badge[data-astro-cid-mtnw4pzq]{display:inline-block;background:#e5484d;color:#fff;font-weight:800;font-size:.78rem;padding:.1rem .55rem;border-radius:6px;margin-left:.3rem}