:root{--color-sumi:#0a0a0a;--color-ai-deep:#001830;--color-ai:#183060;--color-ai-light:#184878;--color-gold:#d8a860;--color-gold-light:#d8c060;--color-gold-dark:#907848;--color-kinari:#f0d8c0;--font-display:"Oswald", sans-serif;--font-jp:"Zen Kaku Gothic New", sans-serif;--text-headline:clamp(2.25rem, .6rem + 6.6vw, 6.5rem);--text-tagline-en:clamp(.8rem, .68rem + .5vw, 1.05rem);--text-cta:clamp(.8rem, .72rem + .3vw, .95rem);--tracking-wide:.28em;--tracking-normal:.06em;--duration-fast:.15s;--duration-normal:.3s;--duration-reveal:1.4s;--ease-out-expo:cubic-bezier(.16, 1, .3, 1);--space-section:clamp(2.5rem, 2rem + 3vw, 6rem);--hero-content-max-width:880px}*,:before,:after{box-sizing:border-box}html{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}body{background:var(--color-sumi);min-height:100vh;color:var(--color-kinari);font-family:var(--font-jp);margin:0;overflow-x:hidden}img{max-width:100%;display:block}a{color:inherit}.visually-hidden{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.site-header{z-index:10;padding:1.25rem clamp(1.25rem,4vw,3rem);position:absolute;inset:0 0 auto}.site-nav__logo-link{line-height:0;display:inline-block}.site-nav__logo{object-fit:contain;filter:drop-shadow(0 0 8px #0009);width:40px;height:40px}.hero{background:var(--color-ai-deep);width:100%;height:100svh;min-height:560px;position:relative;overflow:hidden}.hero__bg-layer{z-index:0;position:absolute;inset:0}.hero__bg-image{object-fit:cover;object-position:center 30%;width:100%;height:100%}.hero__webgl-mount{z-index:1;pointer-events:none;position:absolute;inset:0}.hero__webgl{opacity:0;width:100%;height:100%;transition:opacity var(--duration-reveal) var(--ease-out-expo);display:block}.hero__webgl.is-ready{opacity:1}.hero__scrim{z-index:2;pointer-events:none;background:linear-gradient(100deg,#0a0a0a99 0%,#0a0a0a4d 30%,#0000 58%),linear-gradient(#0a0a0a0d 0%,#0a0a0a26 55%,#0a0a0a8c 100%);position:absolute;inset:0}.hero__content{z-index:3;height:100%;max-width:var(--hero-content-max-width);padding:var(--space-section) clamp(1.5rem, 6vw, 5rem);grid-template-columns:auto 1fr;align-items:center;column-gap:clamp(1rem,2.5vw,1.75rem);margin-inline:auto;display:grid;position:relative}.hero__rule{background:linear-gradient(180deg, transparent, var(--color-gold) 15%, var(--color-gold) 85%, transparent);opacity:.75;align-self:stretch;width:1px}.hero__content-body{flex-direction:column;align-items:flex-start;gap:clamp(.85rem,2.2vw,1.5rem);min-width:0;display:flex}.hero__tagline{font-family:var(--font-jp);color:var(--color-kinari);margin:0}.hero__headline{font-family:var(--font-jp);font-weight:900;font-size:var(--text-headline);letter-spacing:.01em;color:var(--color-kinari);word-break:keep-all;margin:0;line-height:1.08}.hero__tagline--en{font-family:var(--font-display);font-size:var(--text-tagline-en);letter-spacing:.14em;text-transform:uppercase;color:var(--color-gold-light);opacity:.92;font-weight:500}.hero__cta{font-family:var(--font-display);font-size:var(--text-cta);letter-spacing:.18em;text-transform:uppercase;color:var(--color-gold-light);border:1px solid var(--color-gold);transition:color var(--duration-normal) var(--ease-out-expo), box-shadow var(--duration-normal) var(--ease-out-expo);background:0 0;border-radius:2px;align-items:center;gap:.6rem;margin-top:.5rem;padding:.85em 1.9em;font-weight:600;text-decoration:none;display:inline-flex;position:relative;overflow:hidden}.hero__cta:before{content:"";z-index:-1;background:linear-gradient(120deg, var(--color-gold-dark), var(--color-gold), var(--color-gold-light));transition:transform var(--duration-normal) var(--ease-out-expo);position:absolute;inset:0;transform:translate(-102%)}.hero__cta:hover,.hero__cta:focus-visible{color:var(--color-sumi);box-shadow:0 0 24px #d8a86059}.hero__cta:hover:before,.hero__cta:focus-visible:before{transform:translate(0)}.hero__cta:focus-visible{outline:2px solid var(--color-gold-light);outline-offset:3px}.hero__scroll-indicator{z-index:3;color:var(--color-kinari);opacity:.7;flex-direction:column;align-items:center;gap:.5rem;display:flex;position:absolute;bottom:clamp(1.5rem,4vh,2.5rem);left:50%;transform:translate(-50%)}.hero__scroll-line{background:linear-gradient(180deg, transparent, var(--color-gold-light));width:1px;height:32px;animation:scroll-line-pulse 2.4s var(--ease-out-expo) infinite}.hero__scroll-label{font-family:var(--font-display);letter-spacing:.32em;font-size:.65rem}@keyframes scroll-line-pulse{0%,to{opacity:.3}50%{opacity:1}}@media (prefers-reduced-motion:reduce){.hero__scroll-line{opacity:.6;animation:none}.hero__webgl,.hero__cta,.hero__cta:before{transition:none}}@media (width<=767px){.hero__content{align-items:start;padding-top:clamp(5rem,20vh,8rem)}.hero__scroll-indicator{display:none}}@media (width<=360px){.hero__content{column-gap:.75rem;padding-left:1.25rem;padding-right:1.25rem}}