*{box-sizing:border-box}body{margin:0;background:#f7f8fa;color:#1e293b;font:16px/1.85 system-ui,-apple-system,"PingFang SC",sans-serif}header,main,footer{max-width:820px;margin:auto;padding:28px 24px}header{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;border-bottom:1px solid #dde3eb}header a{text-decoration:none}nav{display:flex;gap:22px}a{color:#1956a8}main{min-height:65vh}h1{font-size:32px;line-height:1.4;margin:24px 0}h2{font-size:22px;margin-top:36px}p,li{overflow-wrap:anywhere}footer{color:#64748b;font-size:14px;border-top:1px solid #dde3eb}a:focus-visible{outline:3px solid #77aaff;outline-offset:4px}@media(prefers-color-scheme:dark){body{background:#101722;color:#e1e7ef}a{color:#93beff}header,footer{border-color:#344054}footer{color:#a5b0c0}}