:root { color-scheme: light; --bg:#edf2fa; --ink:#111a2b; --muted:#41516b; --line:#cad8fa; --cx:#304ea9; }
* { box-sizing:border-box; }
body { margin:0; background:var(--bg); color:var(--ink); font:15px/1.85 "Segoe UI","PingFang SC","Microsoft YaHei",system-ui,sans-serif; -webkit-font-smoothing:antialiased; }
main { max-width:900px; margin:0 auto; padding:0 32px 64px; }
nav { display:flex; align-items:center; gap:24px; flex-wrap:wrap; min-height:76px; border-bottom:1px solid var(--line); font-size:13px; padding-block:18px; }
nav a:first-child { margin-right:auto; font-size:17px; font-weight:700; color:var(--ink); }
h1,h2 { font-family:"Bahnschrift","Segoe UI Variable Display","PingFang SC","Microsoft YaHei",sans-serif; letter-spacing:-.025em; }
h1 { font-size:40px; line-height:1.25; margin:52px 0 28px; }
h2 { font-size:21px; line-height:1.45; margin:34px 0 12px; padding-top:22px; border-top:1px solid var(--line); }
p { margin:12px 0; }
li { margin-block:8px; }
a { color:var(--cx); overflow-wrap:anywhere; text-underline-offset:4px; }
nav a { text-decoration:none; }
a:hover { text-decoration:underline; }
a:focus-visible { outline:2px solid var(--cx); outline-offset:4px; border-radius:3px; }
footer { margin-top:48px; padding-top:24px; border-top:1px solid var(--line); font-size:12px; color:var(--muted); }
@media (max-width:540px) { main { padding-inline:20px; } nav { gap:14px; } nav a:first-child { flex-basis:100%; } h1 { font-size:30px; margin-top:36px; } }
@media (prefers-color-scheme:dark) { :root { color-scheme:dark; --bg:#111a2b; --ink:#edf2fa; --muted:#a4b5d0; --line:#23314a; --cx:#a4b5d0; } }
@media (prefers-reduced-motion:reduce) { html { scroll-behavior:auto; } }

:root{color-scheme:light;--bg:#fffdfa;--surface:#fff;--ink:#202538;--ink-2:#596277;--ink-3:#68748b;--muted:#596277;--line:#e5e8ef;--line-2:#d2dfff;--cx:#285dff;--cx-h:#174ce8;--cx-light:#edf3ff;--cx-line:#d2dfff}
.primary:hover{box-shadow:0 5px 16px #285dff22}.grid>.card:hover{background:#f4f7ff}