:root{--blue:#1877f2;--blue-dark:#0d5cc4;--ink:#171716;--muted:#615d59;--warm:#f6f5f4;--border:rgba(0,0,0,.1);--green:#188a5a;--amber:#c77a12}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:#fff;font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;line-height:1.65}a{color:inherit}.site-header{height:72px;max-width:1200px;margin:auto;padding:0 28px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--border)}.brand{display:flex;gap:10px;align-items:center;text-decoration:none;font-weight:700;font-size:18px}.brand-mark{width:34px;height:34px;border-radius:9px;background:var(--blue);color:#fff;display:grid;place-items:center}.site-header nav{display:flex;gap:28px}.site-header nav a{text-decoration:none;color:var(--muted);font-size:14px;font-weight:600}.site-header nav a:hover,.site-header nav .active{color:var(--blue)}.hero{max-width:1120px;margin:auto;min-height:650px;padding:100px 32px;display:grid;grid-template-columns:1.15fr .85fr;align-items:center;gap:76px}.badge{display:inline-flex;padding:5px 10px;border-radius:999px;background:#eef6ff;color:#0d67c8;font-size:12px;font-weight:700}.hero h1{font-size:64px;line-height:1.08;letter-spacing:-3px;margin:24px 0}.hero-copy>p{max-width:620px;color:var(--muted);font-size:19px;line-height:1.75}.hero-actions{display:flex;gap:12px;margin-top:34px}.button{display:inline-block;padding:11px 20px;border-radius:7px;text-decoration:none;font-weight:700;font-size:15px}.primary{background:var(--blue);color:#fff}.primary:hover{background:var(--blue-dark)}.secondary{background:var(--warm);border:1px solid var(--border)}.data-card{background:#fff;border:1px solid var(--border);border-radius:18px;padding:24px;box-shadow:0 18px 60px 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