:root{--bg:#ffffff;--text:#1b1f23;--muted:#6a737d;--border:#e1e4e8;--primary:#2563eb;--primary-ink:#ffffff;--card:#f9fafb}
html[data-theme="dark"]{--bg:#0b0f14;--text:#e6edf3;--muted:#9aa5b1;--border:#1f2937;--primary:#3b82f6;--primary-ink:#0b0f14;--card:#111827}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,"Microsoft YaHei",sans-serif;line-height:1.6}
.container{max-width:1080px;margin:0 auto;padding:0 20px}
.site-header{position:sticky;top:0;background:var(--bg);border-bottom:1px solid var(--border);z-index:50}
.header-wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{font-weight:700;font-size:20px;color:var(--text);text-decoration:none}
.nav{display:flex;gap:16px}
.nav a{color:var(--muted);text-decoration:none;padding:8px 4px;border-radius:6px}
.nav a:hover,.nav a.active{color:var(--text);background:rgba(127,127,127,.08)}
.icon-btn{border:1px solid var(--border);background:var(--bg);color:var(--text);padding:8px 10px;border-radius:8px;cursor:pointer}
.hero{padding:56px 0;background:linear-gradient(90deg,rgba(37,99,235,.08),transparent)}
.hero-wrap{display:flex;gap:24px;align-items:center;justify-content:space-between}
.hero-text h1{font-size:36px;line-height:1.2;margin:0 0 12px}
.hero-text p{color:var(--muted);margin:0 0 20px}
.hero-visual img{width:160px;height:160px}
.cta{display:flex;gap:12px}
.btn{display:inline-block;padding:10px 16px;border:1px solid var(--border);border-radius:10px;color:var(--text);text-decoration:none}
.btn.primary{background:var(--primary);border-color:var(--primary);color:var(--primary-ink)}
.features{padding:40px 0}
.features h2{margin:0 0 16px}
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:16px}
.card h3{margin:0 0 8px;font-size:18px}
.callout{padding:28px 0;border-top:1px solid var(--border);border-bottom:1px solid var(--border);background:linear-gradient(0deg,rgba(59,130,246,.08),transparent)}
.callout-wrap{display:flex;align-items:center;justify-content:space-between}
.page-header{padding:36px 0;border-bottom:1px solid var(--border)}
.section{padding:24px 0}
.feature-block{margin:18px 0;padding:16px;border:1px dashed var(--border);border-radius:12px;background:var(--card)}
.docs ol,.docs ul{margin:8px 0 16px 20px}
.code{display:block;background:var(--card);border:1px solid var(--border);border-radius:10px;padding:12px;overflow:auto}
.download-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.support-cards{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.callout-box{margin-top:18px;padding:16px;border:1px solid var(--border);border-radius:12px;display:flex;align-items:center;justify-content:space-between;background:var(--card)}
.site-footer{border-top:1px solid var(--border);padding:16px 0;margin-top:24px}
.footer-wrap{display:flex;align-items:center;justify-content:space-between}
.footer-links{display:flex;gap:12px}
@media (max-width:900px){.grid{grid-template-columns:repeat(2,1fr)}.download-grid,.support-cards{grid-template-columns:1fr}.hero-wrap{flex-direction:column}.hero-text h1{font-size:28px}}