/* === 公共基础 === */
*,*::before,*::after{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font-family:system-ui,-apple-system,Segoe UI,Helvetica,Arial,"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.5;-webkit-font-smoothing:antialiased}
a{color:inherit}
img{max-width:100%;display:block}
button,input,select,textarea{font:inherit}
.container{max-width:1180px;margin:0 auto;padding:0 20px}
:focus-visible{outline:2px solid #3b82f6;outline-offset:2px}