:root{--bg: #ffffff;--surface: #f6f8fb;--surface-strong: #edf2f7;--card: #ffffff;--text: #101828;--muted: #667085;--line: #e4e7ec;--accent: #10b981;--accent-dark: #059669;--blue: #2563eb;--shadow: 0 18px 50px rgba(15, 23, 42, .08)}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Microsoft YaHei,Arial,sans-serif;color:var(--text);background:var(--bg);line-height:1.6}a{color:inherit;text-decoration:none}button,input{font:inherit}.site-shell{width:min(1120px,calc(100% - 32px));margin:0 auto}.hero{min-height:640px;padding:22px 0 56px;display:grid;grid-template-rows:auto 1fr}.topbar{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:12px 0}.brand{display:inline-flex;align-items:center;gap:10px;font-weight:800;letter-spacing:0}.brand img{width:36px;height:36px;border-radius:9px;object-fit:cover}.nav-links{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:14px}.nav-links a,.ghost-button{border:1px solid 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