:root{--black: #0b0b0b;--ink: #202020;--muted: #6b6b6b;--line: #dedede;--paper: #ffffff;--soft: #f5f5f2;--mist: #dce9df;--accent: #ffe46a;--max: 1120px;--radius: 8px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:var(--paper);font-family:-apple-system,BlinkMacSystemFont,Helvetica Neue,Yu Gothic,YuGothic,Hiragino Kaku Gothic ProN,Meiryo,sans-serif;line-height:1.8;letter-spacing:0}img,iframe{max-width:100%}img{height:auto;display:block}a{color:inherit;text-decoration:none}p,h1,h2,h3{margin-top:0}.site-header{position:sticky;top:0;z-index:50;display:grid;grid-template-columns:auto 1fr auto auto;align-items:center;gap:24px;min-height:76px;padding:12px clamp(16px,4vw,40px);background:#fffffff0;border-bottom:1px solid rgba(0,0,0,.08);backdrop-filter:blur(12px)}.site-logo img{width:104px}.desktop-nav{display:flex;justify-content:flex-end;gap:20px;font-size:14px;color:#333}.desktop-nav a{padding:8px 0;border-bottom:2px solid 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