:root{--brand-primary:#1668dc;--text-primary:#000000e0;--text-secondary:#000000a6;--bg-page:#f5f5f5}*{box-sizing:border-box}html,body{background:var(--bg-page);color:var(--text-primary);margin:0;padding:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif}a{color:var(--brand-primary);text-decoration:none}a:hover{text-decoration:underline}