:root{--blue:#005aff;--ink:#0b1220;--mute:#586277;--line:#e2e6ee;--tint:#f3f6fb;color-scheme:light;box-sizing:border-box}
*,*::before,*::after{box-sizing:inherit}
body{margin:0;background:#fff;color:var(--ink);font:400 18px/1.65 "Source Sans 3",system-ui,-apple-system,"Segoe UI",sans-serif;-webkit-font-smoothing:antialiased}
a{color:var(--blue)}
header.top{border-bottom:1px solid var(--line)}
header.top div{max-width:1160px;margin:0 auto;padding:0 28px;height:68px;display:flex;align-items:center;justify-content:space-between}
header.top img{height:34px;width:auto;display:block}
header.top a.back{font-size:16px;font-weight:500;color:var(--mute);text-decoration:none}
main{max-width:760px;margin:0 auto;padding:56px 28px 80px}
h1{font-size:clamp(36px,5vw,54px);line-height:1.05;letter-spacing:-.03em;font-weight:800;margin:0 0 8px}
.updated{color:var(--mute);margin:0 0 40px;font-size:16px}
h2{font-size:23px;letter-spacing:-.01em;margin:40px 0 8px}
p,li{color:#2a3345}ul{padding-left:22px}li{margin:6px 0}
.box{background:var(--tint);border:1px solid var(--line);border-radius:14px;padding:22px 24px;margin:24px 0}
footer{background:var(--ink);color:#c5ccd9;padding:32px 0;font-size:15px}
footer div{max-width:1160px;margin:0 auto;padding:0 28px;display:flex;gap:24px;flex-wrap:wrap;justify-content:space-between}
footer a{color:#fff}footer nav{display:flex;gap:20px;flex-wrap:wrap}
:focus-visible{outline:3px solid var(--blue);outline-offset:3px;border-radius:4px}