:root{color-scheme:light;--color-bg:#f5f5f7;--color-hero:#fbfbfd;--color-surface:#fff;--color-surface-soft:#f0f2f5;--color-text:#1d1d1f;--color-heading:#1d1d1f;--color-muted:#6e6e73;--color-accent:#0071e3;--color-accent-strong:#0077ed;--color-accent-dark:#2997ff;--color-on-accent:#fff;--color-border:#00000014;--color-tile:#1d1d1f;--color-tile-text:#f5f5f7;--color-tile-muted:#a1a1a6;--color-notice-bg:#fdf8e8;--color-notice-border:#e8dca8;--shadow-sm:0 2px 10px #0000000a;--shadow-md:0 4px 24px #00000012;--shadow-lg:0 20px 60px #0000001f;--font-stack:-apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Segoe UI", "Yu Gothic UI", system-ui, sans-serif;--font-display:var(--font-stack);--font-body:var(--font-stack);--font-utility:var(--font-stack);--radius:18px;--radius-lg:28px;--radius-pill:980px;--content-wide:1180px;--content-reading:760px}*{box-sizing:border-box}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}body{background:var(--color-bg);color:var(--color-text);font-family:var(--font-body);word-break:auto-phrase;overflow-wrap:anywhere;-webkit-font-smoothing:antialiased;margin:0;font-size:17px;line-height:1.8}a{color:var(--color-accent);text-underline-offset:.2em}a:focus-visible{outline:3px solid var(--color-accent);outline-offset:4px;border-radius:4px}img{max-width:100%;display:block}.skip-link{z-index:10;background:var(--color-heading);color:#fff;border-radius:8px;padding:.65rem 1rem;position:fixed;top:.75rem;left:.75rem;transform:translateY(-150%)}.skip-link:focus{transform:translateY(0)}.site-header{z-index:5;border-bottom:1px solid var(--color-border);-webkit-backdrop-filter:blur(20px)saturate(180%);background:#fbfbfdcc;position:sticky;top:0}.header-inner,.footer-inner{width:min(calc(100% - 2rem), var(--content-wide));margin:0 auto}.header-inner{justify-content:space-between;align-items:center;gap:2rem;min-height:56px;display:flex}.site-title,.footer-title{color:var(--color-heading);font-family:var(--font-display);letter-spacing:-.01em;font-weight:700;text-decoration:none}.site-title{white-space:nowrap;align-items:center;gap:.6rem;font-size:1rem;display:inline-flex}.site-mark{aspect-ratio:1;border:2px solid var(--color-heading);border-radius:8px;flex:none;width:26px;position:relative}.site-mark:before,.site-mark:after,.site-mark span{background:var(--color-accent);content:"";position:absolute}.site-mark:before{inset:4px 12px 4px 4px}.site-mark:after{inset:4px 4px 12px 12px}.site-mark span{width:7px;height:7px;bottom:4px;right:4px}.site-header nav,.site-footer nav{align-items:center;gap:clamp(1rem,2.4vw,2rem);display:flex}.site-header nav a{color:var(--color-muted);white-space:nowrap;padding:.4rem 0;font-size:.82rem;font-weight:500;text-decoration:none;transition:color .16s}.site-header nav a:hover,.site-header nav a[aria-current=page]{color:var(--color-heading)}main{min-height:60dvh}.js [data-reveal]{opacity:0;transition:opacity .7s cubic-bezier(.22,1,.36,1),transform .7s cubic-bezier(.22,1,.36,1);transform:translateY(18px)}.js [data-reveal].is-visible{opacity:1;transform:none}.hero{background:var(--color-hero);padding:clamp(4.5rem, 9vw, 7.5rem) max(1.5rem, calc((100% - 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