:root{--ink: #14181d;--muted: #5c6672;--line: #dde3ea;--paper: #ffffff;--ground: #f4f6f9;--accent: #0b7285;--warn: #d9480f;--ok: #2b8a3e;--radius: 10px;color-scheme:light}*{box-sizing:border-box}body{margin:0;background:var(--ground);color:var(--ink);font:15px/1.55 ui-sans-serif,system-ui,-apple-system,Hiragino Kaku Gothic ProN,Noto Sans JP,Yu Gothic,sans-serif;-webkit-font-smoothing:antialiased}.app{max-width:1400px;margin:0 auto;padding:24px 20px 64px}.header{display:flex;justify-content:space-between;align-items:flex-start;gap:24px;flex-wrap:wrap;padding-bottom:18px;border-bottom:1px solid var(--line)}.header h1{margin:0;font-size:27px;letter-spacing:-.01em}.sub{margin:4px 0 0;color:var(--muted)}.header-right{text-align:right}.privacy{margin:0 0 8px;color:var(--ok);font-size:13px;max-width:34ch}.lang{display:inline-flex;border:1px solid var(--line);border-radius:999px;overflow:hidden}.lang button{border:0;background:var(--paper);padding:5px 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