:root{--color-bg:#fff;--color-bg-subtle:#f4f7fb;--color-bg-muted:#e9eef5;--color-bg-stripe:#f7f9fc;--color-text:#232f3e;--color-text-muted:#69778a;--color-text-muted-tint:#5f6b7e;--color-text-soft:#41506a;--color-text-caption:#5a6675;--color-border:#e0e6ef;--color-border-muted:#aeb9c8;--color-border-strong:#1f4570;--color-heading:#2b3a52;--color-navy-strong:#15294a;--color-brand:#1f4570;--color-link:#1f4570;--color-link-hover:#15314f;--color-on-accent:#fff;--color-accent:#2f855a;--color-accent-bg:#eaf0f7;--color-banner:#f3c64a;--color-banner-hover:#efbd2e;--color-info-bg:#eaf2fb;--color-error:#b00020;--color-warn-bg:#fff3cd;--color-warn-border:#ffc107;--color-warn-text:#856404;--color-note-text:#0c3b73;--color-related-bg:#f1f4f8;--color-balloon-bg:#eef6ff;--color-balloon-border:#cfe3fb;--font-sans:-apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", "Noto Sans JP", sans-serif;--font-head:var(--font-sans);--font-mono:"SFMono-Regular", Consolas, 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.balloon-title{margin-bottom:var(--space-1);font-weight:700;display:block}.post-body .balloon>:first-child{margin-top:0}.post-body .balloon>:last-child{margin-bottom:0}.post-body .columns{margin:var(--space-6) 0;flex-wrap:nowrap;align-items:flex-start;gap:1.25rem;display:flex}.post-body .column{min-width:0}.post-body .column>:first-child{margin-top:0}@media (max-width:600px){.post-body .columns{flex-direction:column}.post-body .column{flex-basis:auto!important}}.post-body .btn-link,.post-body .btn-download{margin:var(--space-4) 0;padding:var(--space-2) var(--space-6);background:var(--color-link);color:var(--color-on-accent);border-radius:var(--radius-sm);font-weight:700;text-decoration:none;display:inline-block}.post-body .btn-link:hover,.post-body .btn-download:hover{background:var(--color-link-hover)}.post-body .say{gap:var(--space-3);margin:var(--space-6) 0;align-items:flex-start;display:flex}.post-body .say--right{flex-direction:row-reverse}.post-body 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img:not([width]){aspect-ratio:2/3;object-fit:contain}.post-body .book-card__body{flex:auto;min-width:0}.post-body .book-card__title{font-weight:700;font-size:var(--text-base);color:var(--color-heading);line-height:1.5;text-decoration:none}.post-body .book-card__title:hover{text-decoration:underline}.post-body .book-card__meta{font-size:var(--text-sm);color:var(--color-text-muted);margin:.4rem 0 0}.post-body .book-card__stores{gap:var(--space-2);margin-top:var(--space-3);flex-wrap:wrap;display:flex}.post-body .book-card__store{font-size:var(--text-sm);color:var(--color-link);border:1px solid var(--color-border-strong);border-radius:var(--radius-pill);background:var(--color-bg);padding:.3rem .9rem;font-weight:700;text-decoration:none;display:inline-block}.post-body .book-card__store:hover{background:var(--color-accent-bg)}@media (max-width:480px){.post-body .book-card{flex-direction:column}.post-body .book-card__cover img{width:90px}}.post-body .help-cards{gap:var(--space-4);margin:var(--space-6) 0;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));display:grid}.post-body .help-card{gap:var(--space-1);padding:var(--space-5);border:1px solid var(--color-border);border-radius:var(--radius-lg);background:var(--color-bg);flex-direction:column;text-decoration:none;transition:border-color .15s,background .15s,box-shadow .15s,transform .15s;display:flex}@media (hover:hover){.post-body .help-card:hover{border-color:var(--color-link);background:var(--color-bg-subtle);box-shadow:var(--shadow-card);transform:translateY(-2px)}}.post-body .help-card__title{font-family:var(--font-head);color:var(--color-heading);font-size:var(--text-base)}.post-body .help-card__desc{color:var(--color-text-muted-tint);font-size:var(--text-sm);line-height:1.6}.post-body .help-action{margin:var(--space-2) 0 var(--space-6);padding:var(--space-2) var(--space-5);background:var(--color-bg);border:1px solid 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