:root{--bg:#f6f8fe;--card:#fff;--text:#111827;--muted:#6b7280;--blue:#2f6bff}
*{box-sizing:border-box}
body{margin:0;font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Noto Sans SC",sans-serif;background:linear-gradient(#f6f8fe,#edf1fb);color:var(--text);min-height:100vh}
main{max-width:760px;margin:0 auto;padding:32px 16px 64px}
header{display:flex;align-items:center;gap:14px;margin-bottom:24px}
header img{width:56px;height:56px;border-radius:14px;box-shadow:0 6px 16px rgba(47,107,255,.25)}
header h1{font-size:28px;margin:0}
nav{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:20px}
nav a{padding:6px 14px;border-radius:999px;background:#eaf2ff;color:var(--blue);text-decoration:none;font-weight:600;font-size:14px}
section{background:var(--card);border-radius:22px;padding:22px 24px;margin-bottom:18px;box-shadow:0 6px 16px rgba(30,58,138,.07)}
h2{margin-top:0;font-size:21px}
h3{font-size:17px;margin-bottom:4px}
p,li{color:#1f2937}
.muted{color:var(--muted);font-size:14px}
a{color:var(--blue)}