:root{--ink:#172033;--muted:#657086;--blue:#3157f6}*{box-sizing:border-box}body{margin:0;background:#f5f7fb;color:var(--ink);font-family:"PingFang SC","Microsoft YaHei",system-ui,sans-serif;line-height:1.9}header{height:72px;background:#fff;border-bottom:1px solid #e7ebf2;display:flex;align-items:center;justify-content:space-between;padding:0 max(calc((100% - 900px)/2),24px)}header a{color:var(--blue);text-decoration:none;font-size:14px}main{max-width:900px;margin:42px auto;background:#fff;border:1px solid #e7ebf2;border-radius:20px;padding:58px 70px;box-shadow:0 15px 50px rgba(30,45,85,.06)}.label{color:var(--blue);font-size:12px;font-weight:700;letter-spacing:.18em}h1{font-size:42px;margin:4px 0}.updated{font-size:13px;color:#8a93a6;border-bottom:1px solid #edf0f5;padding-bottom:24px;margin-bottom:28px}h2{font-size:20px;margin:32px 0 8px}p{color:var(--muted)}footer{text-align:center;color:#8b94a8;font-size:12px;padding:10px 20px 40px}@media(max-width:700px){header{padding:0 20px}header b{font-size:13px}main{margin:20px 12px;padding:32px 24px}h1{font-size:34px}}