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(width<=600px){.article-nav{grid-template-columns:1fr}}.article-nav__item{border:1px solid var(--color-border);background:#fff;border-radius:10px;flex-direction:column;gap:.35rem;padding:1rem 1.2rem;text-decoration:none;transition:border-color .2s,box-shadow .2s;display:flex}.article-nav__item:hover{border-color:var(--color-accent-ink);box-shadow:0 2px 12px #c48a3a1f}.article-nav__item--next{text-align:right}.article-nav__item--placeholder{visibility:hidden}.article-nav__label{letter-spacing:.08em;color:var(--color-accent-ink);font-family:Noto Serif JP,serif;font-size:.72rem;font-weight:700}.article-nav__title{color:var(--color-primary);-webkit-line-clamp:2;-webkit-box-orient:vertical;font-family:Noto Serif JP,serif;font-size:.88rem;font-weight:700;line-height:1.55;display:-webkit-box;overflow:hidden}@media (width<=768px){.footer__inner{grid-template-columns:1fr 1fr}}@media (width<=480px){.footer__inner{grid-template-columns:1fr;gap:32px}}@media (width<=640px){.footer__logo-img{height:42px}}.btn{cursor:pointer;white-space:nowrap;border:none;border-radius:100px;justify-content:center;align-items:center;gap:10px;font-family:Noto Serif JP,serif;font-weight:700;text-decoration:none;transition:transform .2s,box-shadow .2s;display:inline-flex}.btn--line{background:var(--color-cta);color:var(--color-cta-text);box-shadow:0 6px 28px #d98a2b61}.btn--line:hover{background:var(--color-cta-hover);box-shadow:0 10px 36px #d98a2b80}.btn--sm{padding:10px 20px;font-size:.82rem}.btn__icon{justify-content:center;align-items:center;display:inline-flex}