.chapter-nav[data-v-189b60c8]{color:#555;font-size:13px;line-height:1.55}.chapter-nav__heading[data-v-189b60c8]{border-bottom:1px solid #e6e6e6;color:#999;font-size:12px;font-weight:700;letter-spacing:.08em;margin-bottom:12px;padding-bottom:8px;text-transform:uppercase}.chapter-nav__list[data-v-189b60c8]{list-style:none;margin:0;padding:0}.chapter-nav__item[data-v-189b60c8]{color:#333;font-size:13px;font-weight:600;margin-bottom:4px}.chapter-nav__item--nested[data-v-189b60c8]{color:#666;font-size:12px;font-weight:400;padding-left:16px}.chapter-nav__link[data-v-189b60c8]{border-radius:4px;color:inherit;display:block;padding:4px 6px;text-decoration:none;transition:background .15s,color .15s}.chapter-nav__link[data-v-189b60c8]:hover{background:#f4f4f4;color:#111}.chapter-nav__text[data-v-189b60c8]{display:block}.chapter-nav__item--active .chapter-nav__link[data-v-189b60c8]{background:#fce4ec;color:#ad1457}.takeaways[data-v-6a811df6]{background:#fafafa;border:1px solid #e6e6e6;border-radius:10px;margin:56px 0 32px;padding:24px 28px 28px}.takeaways__heading[data-v-6a811df6]{color:#111;font-size:18px;font-weight:700;letter-spacing:.02em;margin-bottom:16px}.takeaways__list[data-v-6a811df6]{display:flex;flex-direction:column;gap:14px;list-style:none;margin:0;padding:0}.takeaways__item[data-v-6a811df6]{align-items:flex-start;color:#333;display:flex;font-size:15px;gap:14px;line-height:1.7}.takeaways__num[data-v-6a811df6]{align-items:center;background:#ed1e79;border-radius:50%;color:#fff;display:inline-flex;flex-shrink:0;font-family:Inter,sans-serif;font-size:13px;font-weight:700;height:26px;justify-content:center;width:26px}.takeaways__text[data-v-6a811df6]{flex:1}@media(max-width:600px){.takeaways[data-v-6a811df6]{margin:40px -4px 24px;padding:18px 18px 22px}.takeaways__heading[data-v-6a811df6]{font-size:16px}.takeaways__item[data-v-6a811df6]{font-size:14px}}.textbook-page[data-v-98c6246c]{background:#fff;color:#1a1a1a;font-family:Inter,Noto Sans JP,sans-serif;line-height:1.8;min-height:100vh;--textbook-sidebar-reserve:0px}@media(min-width:1180px){.textbook-page[data-v-98c6246c]{--textbook-sidebar-reserve:304px;padding-right:var(--textbook-sidebar-reserve)}}.textbook-page__main[data-v-98c6246c]{margin:0 auto;max-width:720px;padding:32px 24px 80px;width:100%}.textbook-page__sidebar[data-v-98c6246c]{max-height:calc(100vh - 120px);overflow-y:auto;position:fixed;right:32px;top:80px;width:240px;z-index:5}.textbook-page__sidebar-inner[data-v-98c6246c]{padding:4px 8px}.textbook-page__toc-backdrop[data-v-98c6246c],.textbook-page__toc-close[data-v-98c6246c],.textbook-page__toc-fab[data-v-98c6246c]{display:none}.textbook-page__crumbs[data-v-98c6246c]{align-items:center;color:#888;display:flex;flex-wrap:wrap;font-size:12px;gap:6px;margin-bottom:18px}.crumb[data-v-98c6246c]{color:#888;text-decoration:none}.crumb[data-v-98c6246c]:hover{color:#ed1e79}.crumb--current[data-v-98c6246c]{color:#555;font-weight:600}.crumb-sep[data-v-98c6246c]{color:#ccc}.textbook-page__header[data-v-98c6246c]{border-bottom:1px solid #f0f0f0;margin-bottom:40px;padding-bottom:28px}.textbook-page__chapter-num[data-v-98c6246c]{color:#ed1e79;font-family:Inter,sans-serif;font-size:12px;font-weight:700;letter-spacing:.16em;margin-bottom:8px}.textbook-page__title[data-v-98c6246c]{color:#111;font-size:clamp(28px,4vw,36px);font-weight:900;letter-spacing:.01em;line-height:1.3;margin:0 0 8px}.textbook-page__subtitle[data-v-98c6246c]{color:#666;font-size:16px;line-height:1.6;margin-bottom:20px}.textbook-page__meta[data-v-98c6246c]{color:#777;display:flex;flex-wrap:wrap;font-size:13px;gap:16px;margin-bottom:24px}.meta-item[data-v-98c6246c]{align-items:center;display:inline-flex;gap:6px}.meta-item__icon[data-v-98c6246c]{font-size:13px}.textbook-page__lead[data-v-98c6246c]{background:#fafafa;border-radius:6px;color:#333;font-size:16px;line-height:1.9;margin:0;padding:18px 22px}.textbook-page__body[data-v-98c6246c]{color:#1a1a1a;font-size:16px;line-height:1.9}.textbook-page__body[data-v-98c6246c] h2{border-bottom:2px solid #111;color:#111;font-size:clamp(22px,2.6vw,26px);font-weight:800;line-height:1.4;margin:56px 0 18px;padding-bottom:10px;scroll-margin-top:24px}.textbook-page__body[data-v-98c6246c] h2:first-child{margin-top:0}.textbook-page__body[data-v-98c6246c] h3{color:#222;font-size:18px;font-weight:700;line-height:1.4;margin:36px 0 12px;scroll-margin-top:24px}.textbook-page__body[data-v-98c6246c] p{margin:0 0 18px}.textbook-page__body[data-v-98c6246c] ol,.textbook-page__body[data-v-98c6246c] ul{margin:0 0 18px;padding-left:1.4em}.textbook-page__body[data-v-98c6246c] li{margin-bottom:6px}.textbook-page__body[data-v-98c6246c] strong{color:#111;font-weight:700}.textbook-page__body[data-v-98c6246c] em{background:linear-gradient(transparent 55%,#ffe9f3 0);color:#111;font-style:normal;font-weight:700;padding:0 2px}.textbook-page__body[data-v-98c6246c] code{background:#f4f4f4;border-radius:3px;font-family:Inter,Consolas,monospace;font-size:14px;padding:2px 6px}.textbook-page__body[data-v-98c6246c] blockquote{background:#fafafa;border-radius:6px;color:#555;font-size:15px;margin:18px 0;padding:14px 20px}.textbook-page__body[data-v-98c6246c] table{border-collapse:collapse;font-size:14px;margin:24px 0;width:100%}.textbook-page__body[data-v-98c6246c] td,.textbook-page__body[data-v-98c6246c] th{border:1px solid #e6e6e6;padding:8px 12px;text-align:left}.textbook-page__body[data-v-98c6246c] th{background:#f4f4f4;font-weight:700}.textbook-page__body[data-v-98c6246c] figure{margin:28px 0}.textbook-page__body[data-v-98c6246c] figcaption{color:#777;font-size:13px;margin-top:8px;text-align:center}.textbook-page__chapter-pager[data-v-98c6246c]{border-top:1px solid #f0f0f0;display:grid;gap:16px;grid-template-columns:1fr 1fr;margin-top:48px;padding-top:32px}.pager[data-v-98c6246c]{background:#fff;border:1px solid #e6e6e6;border-radius:8px;color:#222;display:flex;flex-direction:column;gap:4px;min-height:72px;padding:16px 18px;text-decoration:none;transition:background .15s,border-color .15s}.pager[data-v-98c6246c]:hover{background:#fff5fa;border-color:#ed1e79}.pager--prev[data-v-98c6246c]{text-align:left}.pager--next[data-v-98c6246c]{text-align:right}.pager--placeholder[data-v-98c6246c]{background:transparent;border:none}.pager__label[data-v-98c6246c]{align-items:center;color:#999;display:inline-flex;font-size:11px;gap:6px;letter-spacing:.1em;text-transform:uppercase}.pager--next .pager__label[data-v-98c6246c]{justify-content:flex-end}.pager__kbd[data-v-98c6246c]{align-items:center;background:#fafafa;border:solid #d0d0d0;border-radius:4px;border-width:1px 1px 2px;color:#555;display:inline-flex;font-family:Inter,monospace;font-size:11px;height:18px;justify-content:center;letter-spacing:0;line-height:1;min-width:20px;padding:0 5px;text-transform:none}.pager:hover .pager__kbd[data-v-98c6246c]{background:#fff;border-color:#ed1e79;color:#ed1e79}.pager__title[data-v-98c6246c]{color:#111;font-size:15px;font-weight:700;line-height:1.4}.pager--part-transition[data-v-98c6246c]{background:#fafafa}.pager__part-badge[data-v-98c6246c]{color:#ad1457;display:block;font-size:11px;font-weight:700;letter-spacing:.08em;line-height:1.4;margin-bottom:6px}.pager--next.pager--part-transition .pager__part-badge[data-v-98c6246c]{text-align:right}.pager--part-transition[data-v-98c6246c]:hover{background:#fff5fa}@media(max-width:1180px){.textbook-page__sidebar[data-v-98c6246c]{background:#fff;bottom:0;box-shadow:-6px 0 18px #0000001f;margin:0;max-height:100vh;overflow-y:auto;padding:56px 18px 24px;position:fixed;right:0;top:0;transform:translate(100%);transition:transform .28s ease;width:min(340px,88vw);z-index:60}.textbook-page__sidebar.is-open[data-v-98c6246c]{transform:translate(0)}.textbook-page__sidebar-inner[data-v-98c6246c]{border:none;border-radius:0;padding:0}.textbook-page__toc-close[data-v-98c6246c]{align-items:center;background:#fff;border:1px solid #e6e6e6;border-radius:50%;color:#555;cursor:pointer;display:flex;font-size:22px;height:36px;justify-content:center;line-height:1;padding:0;position:absolute;right:12px;top:12px;width:36px}.textbook-page__toc-close[data-v-98c6246c]:hover{border-color:#ed1e79;color:#ed1e79}.textbook-page__toc-fab[data-v-98c6246c]{align-items:center;background:#111;border:none;border-radius:24px;bottom:16px;box-shadow:0 6px 16px #00000038;color:#fff;cursor:pointer;display:inline-flex;font-size:14px;font-weight:700;gap:6px;height:48px;padding:0 16px 0 12px;position:fixed;right:16px;transition:background .15s ease,transform .15s ease;z-index:55}.textbook-page__toc-fab[data-v-98c6246c]:hover{background:#ed1e79}.textbook-page__toc-fab[data-v-98c6246c]:active{transform:scale(.97)}.textbook-page__toc-fab-icon[data-v-98c6246c]{align-items:center;display:inline-flex;justify-content:center}.textbook-page__toc-fab-label[data-v-98c6246c]{line-height:1}.textbook-page__toc-backdrop[data-v-98c6246c]{background:#00000059;display:block;inset:0;position:fixed;z-index:50}.textbook-page__main[data-v-98c6246c]{padding-top:32px}}@media(max-width:600px){.textbook-page__main[data-v-98c6246c]{padding:16px 16px 80px}.textbook-page__toc-fab[data-v-98c6246c]{bottom:12px;right:12px}.textbook-page__lead[data-v-98c6246c]{font-size:15px;padding:14px 16px}.textbook-page__body[data-v-98c6246c]{font-size:15px}.textbook-page__chapter-pager[data-v-98c6246c]{grid-template-columns:1fr}}.tb-figure[data-v-924f5660]{margin:32px 0}.tb-figure__inner[data-v-924f5660]{background:#fff;border:1px solid #e6e6e6;border-radius:8px;overflow:hidden;padding:12px;position:relative;transition:border-color .15s,box-shadow .15s}.tb-figure__inner--zoomable[data-v-924f5660]{cursor:zoom-in}.tb-figure__inner--zoomable[data-v-924f5660]:hover{border-color:#ed1e79;box-shadow:0 2px 12px #ed1e7914}.tb-figure__inner--zoomable[data-v-924f5660]:focus-visible{outline:2px solid #ed1e79;outline-offset:2px}.tb-figure--compact[data-v-924f5660]{margin:12px 0 18px}.tb-figure--compact .tb-figure__inner[data-v-924f5660]{padding:8px}.tb-figure__caption[data-v-924f5660]{color:#888;font-size:12px;line-height:1.5;margin-top:8px;text-align:center}.tb-figure__inner[data-v-924f5660] svg{display:block;height:auto;width:100%}.tb-figure__zoom-hint[data-v-924f5660]{align-items:center;background:#0000008c;border-radius:999px;bottom:10px;color:#fff;display:inline-flex;font-size:11px;gap:4px;opacity:0;padding:4px 9px 4px 8px;pointer-events:none;position:absolute;right:12px;transition:opacity .15s}.tb-figure__inner--zoomable:focus-visible .tb-figure__zoom-hint[data-v-924f5660],.tb-figure__inner--zoomable:hover .tb-figure__zoom-hint[data-v-924f5660]{opacity:1}.tb-figure__zoom-icon[data-v-924f5660]{font-size:13px;line-height:1}.tb-figure-lightbox[data-v-924f5660]{animation:tb-fade-in-924f5660 .15s ease-out;background:#fff;cursor:zoom-out;inset:0;position:fixed;z-index:99999}@keyframes tb-fade-in-924f5660{0%{opacity:0}to{opacity:1}}.tb-figure-lightbox__close[data-v-924f5660]{align-items:center;background:#000000c7;border:1px solid rgba(0,0,0,.1);border-radius:50%;color:#fff;cursor:pointer;display:inline-flex;font-family:inherit;font-size:18px;font-weight:700;height:44px;justify-content:center;position:fixed;right:28px;top:20px;transition:background .15s,color .15s;width:44px;z-index:100000}.tb-figure-lightbox__close[data-v-924f5660]:hover{background:#ed1e79;color:#fff}.tb-figure-lightbox__inner[data-v-924f5660]{align-items:center;background:#fff;border:1px solid #e6e6e6;border-radius:8px;box-sizing:border-box;cursor:default;display:flex;justify-content:center;inset:64px 16px 56px;padding:20px;position:absolute}.tb-figure-lightbox__inner[data-v-924f5660] svg{display:block;max-height:100%;max-width:100%}.tb-figure-lightbox__caption[data-v-924f5660]{bottom:14px;color:#555;font-size:12px;left:16px;line-height:1.5;margin:0;pointer-events:none;position:absolute;right:16px;text-align:center}@media(max-width:600px){.tb-figure[data-v-924f5660]{margin:24px -8px}.tb-figure__inner[data-v-924f5660]{border-radius:6px;padding:8px}.tb-figure-lightbox__inner[data-v-924f5660]{inset:56px 8px 48px;padding:10px}.tb-figure-lightbox__caption[data-v-924f5660]{bottom:10px;font-size:11px}.tb-figure-lightbox__close[data-v-924f5660]{font-size:16px;height:36px;right:12px;top:12px;width:36px}}.inline-quiz[data-v-f4dc45bf]{background:#fafafa;border:1px solid #e6e6e6;border-radius:10px;margin:32px 0;padding:16px 20px 20px}@media(min-width:1100px){.inline-quiz--with-figure[data-v-f4dc45bf]{margin-left:calc(50% - (min(calc(100vw - 400px),1500px)/2));margin-right:calc(50% - (min(calc(100vw - 400px),1500px)/2));width:min(calc(100vw - 400px),1500px)}.inline-quiz--with-figure .inline-quiz__layout[data-v-f4dc45bf]{align-items:start;display:grid;gap:28px;grid-template-columns:minmax(0,2fr) minmax(340px,1fr)}.inline-quiz--with-figure .inline-quiz__figure[data-v-f4dc45bf]{margin-bottom:0}}.inline-quiz__caption[data-v-f4dc45bf]{align-items:center;color:#555;display:flex;font-size:13px;font-weight:700;gap:8px;letter-spacing:.04em;margin-bottom:12px}.inline-quiz__icon[data-v-f4dc45bf]{font-size:14px}.inline-quiz__caption-text[data-v-f4dc45bf]{flex:0 1 auto}.inline-quiz__id[data-v-f4dc45bf]{color:#999;font-family:Inter,monospace;font-size:11px;font-weight:500;letter-spacing:.06em;margin-left:auto}.inline-quiz__figure[data-v-f4dc45bf]{margin-bottom:16px}.inline-quiz__figure[data-v-f4dc45bf] .tb-figure{margin:0}.inline-quiz__figure-hint[data-v-f4dc45bf]{color:#aaa;font-size:11px;letter-spacing:.04em;margin:6px 0 0;text-align:center}.inline-quiz__more[data-v-f4dc45bf]{font-size:13px;margin-top:12px;text-align:right}.inline-quiz__more-link[data-v-f4dc45bf]{border-bottom:1px dashed #ad1457;color:#ad1457;padding-bottom:1px;text-decoration:none}.inline-quiz__more-link[data-v-f4dc45bf]:hover{border-bottom-color:#ed1e79;color:#ed1e79}.inline-quiz[data-v-f4dc45bf] .quiz-card{background:transparent;border:none;padding:0}@media(max-width:600px){.inline-quiz[data-v-f4dc45bf]{border-radius:8px;margin:24px -8px;padding:12px 14px 16px}}