:root { --fg: #222; --muted: #666; --line: #e5e5e5; --link: #0b5fa5; --bg: #fff; }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.7 -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif; }
.wrap { max-width: 720px; margin: 0 auto; padding: 0 20px; }
header { border-bottom: 1px solid var(--line); padding: 18px 0; }
header .wrap { display: flex; align-items: baseline; gap: 24px; flex-wrap: wrap; }
header .brand { font-weight: 600; font-size: 18px; color: var(--fg); text-decoration: none; }
header nav a { color: var(--muted); text-decoration: none; margin-right: 16px; }
header nav a:hover, a:hover { text-decoration: underline; }
a { color: var(--link); }
main { padding: 32px 0 48px; }
h1 { font-size: 26px; margin: 0 0 12px; }
h2 { font-size: 19px; margin: 28px 0 8px; }
p, li { margin: 0 0 10px; }
.muted { color: var(--muted); }
ul.notes { list-style: none; padding: 0; }
ul.notes li { padding: 10px 0; border-bottom: 1px solid var(--line); }
ul.notes time { color: var(--muted); font-size: 14px; margin-right: 12px; }
pre { background: #f6f6f6; padding: 12px 14px; overflow-x: auto; font-size: 14px; line-height: 1.5; }
code { font-family: Menlo, Consolas, monospace; font-size: 0.95em; }
footer { border-top: 1px solid var(--line); padding: 20px 0 32px; font-size: 14px; color: var(--muted); }
footer a { color: var(--muted); }
footer p { margin: 0 0 4px; }
footer img { vertical-align: middle; height: 16px; margin-right: 4px; }