:root{color-scheme:light;--mint:#10B094;--sky:#389EF5;--ink:#1d2b2a;--muted:#5b6b69;--bg:#f6fbfa}
*{box-sizing:border-box}body{margin:0;font:16px/1.75 -apple-system,BlinkMacSystemFont,"PingFang SC","Helvetica Neue",sans-serif;color:var(--ink);background:var(--bg)}
main{max-width:760px;margin:0 auto;padding:48px 24px 80px}
header{display:flex;align-items:center;gap:14px;margin-bottom:28px}
header img{width:64px;height:64px;border-radius:15px;box-shadow:0 6px 18px rgba(16,176,148,.25)}
h1{font-size:28px;margin:0}h2{font-size:20px;margin:32px 0 8px}
p,li{color:var(--ink)}.muted{color:var(--muted);font-size:14px}
.card{background:#fff;border-radius:18px;padding:20px 22px;box-shadow:0 6px 20px rgba(16,176,148,.08);margin:16px 0}
a{color:var(--sky)}
footer{margin-top:48px;color:var(--muted);font-size:13px}