*,*::before,*::after{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--smt-bg);color:var(--smt-text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",Arial,sans-serif;font-size:16px;line-height:1.8}img{max-width:100%;height:auto;display:block}a{color:var(--smt-primary);text-decoration:none}a:hover{color:var(--smt-primary-dark)}button,input,select,textarea{font:inherit}