:root {
	--ink: #1f2a33;
	--muted: #5d6b76;
	--line: #e3e8ec;
	--accent: #1f6fb2;
	--paper: #fbfcfd;
	--code: #f2f5f7;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
	margin: 0;
	background: var(--paper);
	color: var(--ink);
	font: 16px/1.75 -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
}
main, header, footer { max-width: 720px; margin: 0 auto; padding: 0 20px; }
header { padding-top: 48px; padding-bottom: 8px; }
header h1 { margin: 0; font-size: 28px; letter-spacing: 1px; }
header h1 a { color: inherit; text-decoration: none; }
header p { margin: 6px 0 0; color: var(--muted); }
a { color: var(--accent); }
h2 { font-size: 22px; margin: 40px 0 8px; line-height: 1.4; }
h3 { font-size: 18px; margin: 28px 0 6px; }
.meta { color: var(--muted); font-size: 14px; margin: 0 0 20px; }
ul.notes { list-style: none; padding: 0; margin: 24px 0 0; }
ul.notes li { padding: 18px 0; border-top: 1px solid var(--line); }
ul.notes li:last-child { border-bottom: 1px solid var(--line); }
ul.notes a { font-size: 18px; font-weight: 600; text-decoration: none; }
ul.notes p { margin: 4px 0 0; color: var(--muted); font-size: 15px; }
code { background: var(--code); padding: 1px 5px; border-radius: 4px; font-size: 0.92em; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
pre { background: var(--code); padding: 12px 14px; border-radius: 6px; overflow-x: auto; font-size: 14px; line-height: 1.55; }
pre code { background: none; padding: 0; }
table { border-collapse: collapse; width: 100%; margin: 12px 0; font-size: 15px; }
th, td { border: 1px solid var(--line); padding: 6px 10px; text-align: left; }
th { background: var(--code); }
blockquote { margin: 16px 0; padding: 2px 16px; border-left: 3px solid var(--line); color: var(--muted); }
footer { margin-top: 56px; padding-top: 16px; padding-bottom: 40px; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }
footer a { color: var(--muted); }
footer span + span::before { content: " · "; }