*{margin:0;padding:0;box-sizing:border-box}html{font-size:14px}body{font-family:PingFang SC,Microsoft YaHei,Arial,sans-serif;color:#333;background:#f5f5f5;-webkit-tap-highlight-color:transparent}a{text-decoration:none;color:inherit}ol,ul{list-style:none}img{max-width:100%;display:block}:root{--primary-color:#e8380d;--nav-bg-color:#1a1a1a;--nav-text-color:#fff}