:root{--color-primary:#ff6900;--color-primary-dark:#e55d00;--color-text:#333;--color-text-secondary:#666;--color-bg:#f5f5f5;--color-card:#fff;--color-bg-light:#f7f7f7;--color-border:#eee;--color-success:#52c41a;--color-danger:#e4362b;--font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;--container-max:1200px;--header-height:64px}*,:after,:before{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;-webkit-font-smoothing:antialiased;-webkit-text-size-adjust:100%}body{font-family:var(--font-sans);color:var(--color-text);background:var(--color-bg);line-height:1.6}a{color:inherit;text-decoration:none}img{max-width:100%;height:auto;display:block}.container{max-width:var(--container-max);margin:0 auto;padding:0 16px}@media(min-width:768px){.container{padding:0 24px}}