*{box-sizing:border-box}
body{font:16px/1.65 system-ui,-apple-system,sans-serif;margin:0;color:#1b1b1f;background:#fbfbfd}
header{display:flex;justify-content:space-between;align-items:center;padding:18px 28px;border-bottom:1px solid #e6e6ee}
nav a{margin-left:16px;color:#3b5bdb;text-decoration:none}
main{max-width:680px;margin:56px auto;padding:0 22px}
h1{font-size:30px;line-height:1.2;margin:0 0 14px}
.tag{display:inline-block;margin-top:22px;padding:8px 14px;background:#eef1ff;border-radius:8px;font-size:14px;color:#33409a}