:root{--ink:#1c2230;--muted:#5b6470;--line:#e6e8ec;--bg:#fff;--bg-soft:#f6f7f9;--accent:#2b6cb0;--accent-ink:#1f5a96;--radius:14px;--maxw:920px}.site-bg{z-index:-1;pointer-events:none;background:var(--bg);position:fixed;inset:0;overflow:hidden}.hexbg{width:100%;height:100%;position:absolute;inset:0}.hexbg .drift{will-change:transform;animation:248s linear infinite bg-drift}@keyframes bg-drift{0%{transform:translate(0)}to{transform:translate(-1152px,665.11px)}}@media (prefers-reduced-motion:reduce){.hexbg .drift{animation:none}}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}body{color:var(--ink);background:var(--bg);margin:0;font-family:-apple-system,BlinkMacSystemFont,Hiragino Sans,Noto Sans JP,Segoe UI,Roboto,Helvetica,Arial,sans-serif;font-size:17px;line-height:1.85}a{color:var(--accent-ink)}img{max-width:100%;height:auto}.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}.site-header{border-bottom:1px solid 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