:root { font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", sans-serif; color: #263a31; background: #f7faf8; }
* { box-sizing: border-box; }
body { margin: 0; }
main { width: min(720px, 100%); margin: 0 auto; padding: 42px 22px 70px; }
a { color: #4d9477; }
h1 { margin: 0 0 8px; font-size: 28px; }
.date { margin: 0 0 28px; color: #8b9992; font-size: 13px; }
.intro { padding: 15px 17px; border-radius: 16px; background: #edf6f1; color: #5f756a; line-height: 1.7; }
section { margin-top: 28px; }
h2 { margin: 0 0 9px; font-size: 18px; }
p, li { color: #627269; font-size: 15px; line-height: 1.85; }
.card { padding: 18px; border: 1px solid #e5ece8; border-radius: 18px; background: white; }
.back { display: inline-block; margin-top: 35px; text-decoration: none; font-weight: 650; }