:root{--accent:#5944c7;color-scheme:light}*{box-sizing:border-box}body{margin:0;background:#f7f9fb;color:#25383f;font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.9}a{color:var(--accent);text-underline-offset:4px}header,footer{max-width:960px;margin:auto;padding:28px 24px;display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px}.brand{font-size:23px;font-weight:750;text-decoration:none}main{max-width:912px;margin:12px auto;padding:44px 56px;background:#fff;border:1px solid #e3e9ed;border-radius:20px}h1{font-size:38px;line-height:1.3}h2{font-size:20px;line-height:1.5;margin:30px 0 8px}p{margin:0 0 16px}.eyebrow{color:var(--accent);font-weight:650}.updated{color:#667781;font-size:14px}.return{display:inline-block;margin-top:24px}footer{justify-content:center;font-size:14px}@media(max-width:600px){header,footer{padding:20px}main{padding:28px 22px;border-radius:0;border-left:0;border-right:0}h1{font-size:30px}}