:root{--background:#fff;--foreground:#152445;--primary:#f4621c;--primary-hover:#e05216;--secondary:#152445;--accent:#fdf2ed;--text-muted:#666}@media (prefers-color-scheme:dark){:root{--background:#0a0a0a;--foreground:#f5f5f5;--secondary:#2c3e5a;--accent:#1a1a1a}}*{box-sizing:border-box;margin:0;padding:0}html,body{max-width:100vw;color:var(--foreground);background:var(--background);-webkit-font-smoothing:antialiased;font-family:PingFang SC,Hiragino Sans GB,Microsoft YaHei,Helvetica Neue,Helvetica,Arial,sans-serif;overflow-x:hidden}a{color:inherit;text-decoration:none;transition:all .2s}h1,h2,h3,h4{color:var(--secondary);line-height:1.2}.container{max-width:1200px;margin:0 auto;padding:0 20px}