:root{
  --fg:#0b1220;--bg:#ffffff;--muted:#5b6876;--edge:#e9edf3;--primary:#0a84ff;
}
@media (prefers-color-scheme: dark){
  :root{--fg:#e8eef9;--bg:#0b1220;--muted:#9fb1c7;--edge:#1b2433;}
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--fg);font:16px/1.6 -apple-system,BlinkMacSystemFont,Segoe UI,Inter,Roboto,Helvetica,Arial,sans-serif}
a{color:var(--primary);text-decoration:none}
.container{max-width:980px;margin:0 auto;padding:0 20px}
.site-header{position:sticky;top:0;background:rgba(255,255,255,.7);backdrop-filter:saturate(180%) blur(10px);border-bottom:1px solid var(--edge)}
@media (prefers-color-scheme: dark){.site-header{background:rgba(11,18,32,.7)}}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700}
.brand-icon{width:24px;height:24px;border-radius:6px}
.brand-name{font-size:18px}
.nav{display:flex;align-items:center;gap:16px}
.lang-switch button{background:transparent;border:1px solid var(--edge);padding:6px 8px;border-radius:8px;cursor:pointer}
.hero{padding:80px 0;border-bottom:1px solid var(--edge)}
.hero h1{font-size:40px;margin:0 0 12px}
.lead{color:var(--muted);max-width:640px}
.button{display:inline-block;margin-top:16px;padding:12px 16px;border-radius:12px;background:var(--primary);color:#fff;font-weight:700}
.section{padding:56px 0}
.grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
@media (max-width:800px){.grid{grid-template-columns:1fr}}
.card{border:1px solid var(--edge);border-radius:14px;padding:16px}
.site-footer{border-top:1px solid var(--edge);padding:28px 0;text-align:center;color:var(--muted)}
.small{font-size:12px;color:var(--muted)}