:root{color-scheme:light;--ink:#172033;--muted:#687286;--line:#e5e9f0;--brand:#3659e3;--surface:#f5f7fb}*{box-sizing:border-box}body{margin:0;color:var(--ink);background:var(--surface);font:16px/1.78 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}header{background:#101a33;color:#fff}header div,main,footer{width:min(880px,calc(100% - 40px));margin:auto}header div{padding:52px 0 44px}header a{color:#a8c3ff;text-decoration:none}h1{font-size:clamp(32px,6vw,48px);line-height:1.2;margin:20px 0 10px}header p{color:#c6cede;margin:0}main{background:#fff;margin-top:32px;margin-bottom:32px;padding:clamp(28px,6vw,58px);border:1px solid var(--line);border-radius:20px;box-shadow:0 16px 50px rgba(20,34,66,.07)}h2{font-size:22px;margin:38px 0 10px}h2:first-child{margin-top:0}h3{font-size:17px;margin:24px 0 6px}p,li{color:#3f495d}li+li{margin-top:7px}a{color:var(--brand)}.note{background:#eef3ff;border-left:4px solid var(--brand);padding:16px 18px;border-radius:8px;color:#344466}.meta{font-size:14px;color:var(--muted)}footer{padding:4px 0 42px;color:var(--muted);font-size:14px}@media(max-width:600px){header div{padding:34px 0 30px}main{width:100%;margin:0;border:0;border-radius:0;box-shadow:none;padding:28px 20px}footer{padding:24px 20px;width:100%}}