:root{--color-bg: #FFFFFF;--color-bg-subtle: #F7F7F5;--color-surface: #FFFFFF;--color-border: #E5E3DF;--color-border-strong: #111111;--color-text: #111111;--color-text-muted: #767370;--color-primary: #111111;--color-primary-dark: #000000;--color-secondary: #767370;--color-accent: #111111;--color-accent-purple: #767370;--font-sans: "IBM Plex Sans", "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", sans-serif;--ink: #14110d;--font-serif: "Noto Serif JP", "Hiragino Mincho ProN", "Yu Mincho", serif;--space-xs: .5rem;--space-sm: .75rem;--space-md: 1.5rem;--space-lg: 2.5rem;--space-xl: 4rem;--radius: 8px;--container: 1000px}*,*:before,*:after{box-sizing:border-box}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}body{margin:0;background:var(--color-bg);color:var(--color-text);font-family:var(--font-sans);font-size:16px;line-height:1.9;font-weight:400;-webkit-font-smoothing:antialiased}h1,h2,h3,h4{line-height:1.5;font-weight:600;color:var(--color-text);margin:0;font-family:var(--font-serif)}p{margin:0}a{color:var(--color-primary);text-decoration:none}a:hover{text-decoration:underline;text-underline-offset:3px}img{max-width:100%;height:auto}.container{max-width:var(--container);margin-inline:auto;padding-inline:var(--space-md)}.container--narrow{max-width:720px}.eyebrow{font-size:.72rem;font-weight:500;letter-spacing:.14em;text-transform:uppercase;color:var(--color-text-muted);margin:0}.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}.site-header{border-bottom:1px solid var(--color-border);background:var(--color-surface);position:sticky;top:0;z-index:20}.site-header__inner{display:flex;align-items:center;justify-content:space-between;gap:var(--space-md);height:64px}.site-brand{display:flex;align-items:center;gap:.6rem}.site-brand img{height:24px;width:auto;display:block}.site-brand:hover{text-decoration:none}.site-brand__tag{font-size:.65rem;font-weight:600;letter-spacing:.18em;color:var(--color-text-muted);padding-left:.6rem;border-left:1px solid var(--color-border)}.site-nav{display:flex;align-items:center;gap:var(--space-md);font-size:.85rem}.site-nav a{color:var(--color-text-muted)}.site-nav a:hover{color:var(--color-text);text-decoration:none}.site-nav .site-nav__cta{color:var(--color-primary);font-weight:500}.site-nav .site-nav__ext{color:var(--color-text-muted)}.site-nav .site-nav__btn{background:var(--color-primary);color:#fff;padding:.5rem 1rem;border-radius:var(--radius);font-weight:500}.site-nav .site-nav__btn:hover{background:var(--color-primary-dark);color:#fff;text-decoration:none}.site-footer{margin-top:var(--space-xl);border-top:1px solid var(--color-border);background:#26241f;padding-block:var(--space-lg) var(--space-md);font-size:.8rem;color:#b3aea6}.site-footer__cols{display:grid;grid-template-columns:1.4fr 1fr .8fr 1fr;gap:2rem}.site-footer__brand{color:#fff;font-weight:700;font-size:.95rem}.site-footer__desc{margin-top:.5rem;font-size:.74rem;line-height:1.8}.site-footer__head{color:#fff;font-weight:600;font-size:.78rem;margin-bottom:.4rem;padding-bottom:.35rem;border-bottom:1px solid #4a463f}.site-footer__cols nav a{display:block;color:#b3aea6;font-size:.76rem;padding-block:.28rem}.site-footer__cols nav a:hover{color:#fff;text-decoration:none}.site-footer__bottom{margin-top:1.75rem;padding-top:.9rem;border-top:1px solid #4a463f;font-size:.72rem}@media(max-width:760px){.site-footer__cols{grid-template-columns:1fr 1fr}}.btn{display:inline-flex;align-items:center;gap:.4rem;padding:.7rem 1.4rem;border-radius:var(--radius);font-size:.88rem;font-weight:500;border:1px solid transparent;transition:background-color .15s ease,border-color .15s ease}.btn:hover{text-decoration:none}.btn--primary{background:var(--color-primary);color:#fff}.btn--primary:hover{background:var(--color-primary-dark)}.btn--ghost{border-color:var(--color-border-strong);color:var(--color-text);background:transparent}.btn--ghost:hover{background:var(--color-bg-subtle)}@media(max-width:640px){body{font-size:15px}.site-nav{gap:var(--space-sm);font-size:.78rem}.site-brand__tag{display:none}}