:root{--blue: #2563eb;--blue-dark: #1d4ed8;--ink: #0f172a;--muted: #64748b;--border: #e2e8f0;--bg: #ffffff;--bg-alt: #f8fafc;--radius: 14px;--shadow: 0 10px 30px rgba(2, 6, 23, .08);--font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.65;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}.container{width:min(1120px,92%);margin:0 auto}.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 22px;border-radius:999px;font-weight:600;font-size:15px;border:1px solid transparent;cursor:pointer;transition:all .2s ease}.btn-primary{background:var(--blue);color:#fff}.btn-primary:hover{background:var(--blue-dark);transform:translateY(-1px)}.btn-outline{background:#fff;color:var(--ink);border-color:var(--border)}.btn-outline:hover{border-color:var(--blue);color:var(--blue)}.site-header{position:sticky;top:0;z-index:50;background:#ffffffe6;backdrop-filter:blur(8px);border-bottom:1px solid var(--border)}.header-inner{display:flex;align-items:center;gap:24px;height:68px}.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px}.brand-mark{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:9px;background:linear-gradient(135deg,var(--blue),#7c3aed);color:#fff;font-weight:800}.main-nav{display:flex;gap:8px;margin-left:auto}.nav-link{padding:8px 14px;border-radius:999px;font-weight:500;color:var(--muted);transition:all .2s}.nav-link:hover{color:var(--ink);background:var(--bg-alt)}.nav-cta{margin-left:8px}.hero{padding:90px 0 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