body { font: normal .875rem/1.5 Arial, "Microsoft YaHei", 黑体, 宋体, sans-serif; color:#333; background:#FFF; }
.wrapper { max-width:960px;margin:0 auto;}
.content{ padding:.625rem; }
@media only screen and (max-width: 330px) {
  html { font-size: 14px; }
}
@media only screen and (min-width: 330px) and (max-width: 640px) {
  html { font-size: 16px; }
}
@media only screen and (min-width: 960px) {
  html { font-size: 18px; }
}
@media only screen and (min-width: 1024px) {
  html { font-size: 16px; }
}