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var(--ease)}html[lang=en] .nav-overlay__link{font-family:var(--font-en);font-style:italic}.nav-overlay.is-open .nav-overlay__link{opacity:1;transform:translateY(0);transition-delay:calc(.16s + var(--i) * 50ms)}.nav-overlay__link:hover,.nav-overlay__link:focus-visible{color:var(--color-accent)}.nav-overlay__link-num{font-family:var(--font-en);font-size:.8rem;font-style:italic;color:var(--color-accent);letter-spacing:.15em}.nav-overlay__link-line{display:inline-block;width:100%;height:1px;background:var(--color-accent);opacity:.4}.nav-overlay__link-label{font-size:clamp(1.75rem,7vw,2.5rem);font-weight:500;line-height:1.2;letter-spacing:.02em}.nav-overlay__foot{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding-top:2rem;margin-top:2rem;border-top:1px solid var(--color-line)}.nav-overlay__mail{font-family:var(--font-ui);font-size:.8rem;letter-spacing:.08em;color:var(--color-ink-light);word-break:break-all;padding-bottom:2px;border-bottom:1px solid transparent;transition:border-color var(--duration) var(--ease),color var(--duration) var(--ease)}.nav-overlay__mail:hover,.nav-overlay__mail:focus-visible{color:var(--color-ink);border-bottom-color:var(--color-accent)}.lang-switch{font-family:var(--font-en);font-size:.85rem;color:var(--color-ink);padding:.4rem .85rem;border:1px solid var(--color-ink);letter-spacing:.1em;transition:all var(--duration) var(--ease);display:inline-flex;align-items:center;text-decoration:none}.lang-switch:hover,.lang-switch:focus-visible{background:var(--color-ink);color:var(--color-bg)}.btn{display:inline-flex;align-items:center;justify-content:center;padding:.95rem 2rem;font-family:var(--font-ui);font-size:.95rem;letter-spacing:.05em;transition:all var(--duration) var(--ease);border:1px solid transparent;text-align:center}.btn--primary{background:var(--color-ink);color:var(--color-bg)}.btn--primary:hover,.btn--primary:focus-visible{background:var(--color-accent)}.btn--ghost{border-color:var(--color-ink);color:var(--color-ink)}.btn--ghost:hover,.btn--ghost:focus-visible{background:var(--color-ink);color:var(--color-bg)}.section{padding:var(--space-xl) 2rem;position:relative}.section--alt{background:var(--color-bg-alt)}.section__inner{max-width:var(--container-max);margin:0 auto}.footer{background:var(--color-bg);padding:4rem 2rem 3rem;border-top:1px solid var(--color-line)}.footer__inner{max-width:var(--container-max);margin:0 auto;text-align:center}.footer__sign{display:flex;align-items:center;justify-content:center;gap:1rem;margin-bottom:2.5rem}.footer__sign-line{flex:0 0 3rem;height:1px;background:var(--color-accent)}.footer__sign-label{font-family:var(--font-en);font-style:italic;font-size:.78rem;letter-spacing:.28em;text-transform:uppercase;color:var(--color-accent)}.footer__copy{font-family:var(--font-zh);font-size:.95rem;color:var(--color-ink-light);margin-bottom:.5rem}.footer__meta{font-family:var(--font-zh);font-size:.85rem;color:var(--color-ink-mute);letter-spacing:.15em}.fade-in{opacity:0;transform:translateY(8px);transition:opacity .9s var(--ease),transform .9s var(--ease)}.fade-in.visible{opacity:1;transform:translateY(0)}@media(max-width:900px){.nav__menu{display:none}.nav__toggle{display:inline-flex}.nav__inner{padding:1rem 1.25rem}}@media(max-width:768px){.section{padding:5rem 1.25rem}}