:root{--brand:#00a0e9;--brand-dark:#0088c7;--brand-light:#e8f7fe;--brand-soft:#f4fbfe;--text:#333;--text-muted:#767676;--border:#e5e5e5;--bg-soft:#f8f9fa;--radius:4px}*{box-sizing:border-box}body.site{color:var(--text);-webkit-font-smoothing:antialiased;background:#fff;margin:0;font-family:-apple-system,BlinkMacSystemFont,PingFang SC,Hiragino Sans GB,Microsoft YaHei,Segoe UI,Arial,sans-serif;font-size:14px;line-height:1.8}.site a{color:var(--brand);text-decoration:none}.site a:hover{text-decoration:underline}.site img{vertical-align:middle;max-width:100%}.container{max-width:1170px;margin:0 auto;padding:0 20px}.site-header{z-index:100;border-bottom:1px solid var(--border);background:#fff;position:sticky;top:0;box-shadow:0 1px 4px #0000000a}.site-header-inner{justify-content:space-between;align-items:center;gap:20px;height:62px;display:flex}.site-logo img{height:34px;display:block}.site-nav{flex-wrap:wrap;align-items:center;gap:4px;display:flex}.site-nav 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