:root{--chatworks-red:#f00000;--chatworks-red-deep:#b80000;--chatworks-red-soft:#fff6f6;--ink:#171717;--muted:#636363;--line:rgba(22,22,22,0.09);--panel:#ffffff;--panel-soft:#fcfbfb;--shadow-soft:0 20px 60px rgba(20,20,20,0.05)}*{box-sizing:border-box}body,html{margin:0;padding:0;font-family:Inter,Segoe UI,Helvetica,Arial,sans-serif;color:var(--ink);background:radial-gradient(circle at top right,rgba(240,0,0,.045),transparent 20rem),linear-gradient(180deg,#ffffff,#fffdfd)}body{min-height:100vh}a{color:inherit;text-decoration:none}.page{min-height:100vh;max-width:1220px;margin:0 auto;padding:24px 24px 34px;display:flex;flex-direction:column}.site-header{display:flex;align-items:center;justify-content:space-between;gap:28px;padding:16px 18px;border:1px solid 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