:root { --ink: #0f1419; --muted: #5a6470; --border: #e5e8ec; --bg: #fffdf7; --link: #2563eb; }
* { box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif; line-height: 1.7; color: var(--ink); background: var(--bg); margin: 0; padding: 24px; }
.container { max-width: 760px; margin: 0 auto; padding: 16px; background: #fff; border: 1px solid var(--border); border-radius: 14px; box-shadow: 0 1px 2px rgba(0,0,0,.04); }
h1 { font-size: 28px; line-height: 1.3; margin: 8px 0 4px; }
h2 { font-size: 19px; line-height: 1.3; margin: 28px 0 8px; padding-top: 8px; border-top: 1px solid var(--border); }
h2:first-of-type { border-top: none; padding-top: 0; }
p, li { font-size: 15px; }
.meta { color: var(--muted); font-size: 13px; margin-bottom: 16px; }
ul { padding-left: 20px; }
li { margin: 6px 0; }
a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }
.footer { color: var(--muted); font-size: 13px; margin-top: 32px; padding-top: 16px; border-top: 1px solid var(--border); text-align: center; }
@media (max-width: 600px) { body { padding: 12px; } .container { padding: 12px; } h1 { font-size: 24px; } h2 { font-size: 17px; } }