:root{
  --bg:#ffffff;
  --text:#111;
  --muted:#666;
  --line:#e9e9ee;
  --brand:#0b2a7a;
  --accent:#d3122a;
  --header-h:84px;
  --wrap:1180px;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC",
               "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
  color:var(--text);
  background:var(--bg);
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{width:min(var(--wrap), calc(100% - 48px)); margin:0 auto}
.center{text-align:center}
.muted{color:var(--muted)}