body { margin:0; background:#fff; color:#1f2430; font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif; line-height:1.75; }
main { max-width:760px; margin:0 auto; padding:28px 18px 60px; }
h1 { font-size:24px; line-height:1.4; margin:6px 0 18px; }
h2 { font-size:20px; margin:30px 0 10px; }
img { max-width:100%; height:auto; border-radius:10px; }
figure { margin:14px 0; }
figcaption { color:#6b7280; font-size:13px; margin-top:6px; }
a { color:#2563eb; word-break:break-all; }
.red { color:#dc2626; }