:root{--bg:#E6EBF2;--nav:#F5F7FB;--white:#fff;--soft:#EEF2F7;--line:rgba(40,156,255,.16);--blue:#289CFF;--text:#243447;--muted:#66788A;--note:#8A9AAF;--footer:#243447;--shadow:0 14px 36px rgba(56,92,138,.12)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",Arial,sans-serif;line-height:1.75;overflow-x:hidden}a{text-decoration:none;color:inherit}img{max-width:100%;display:block}.container{width:min(1180px,calc(100% - 32px));margin:auto}.site-header{position:sticky;top:0;z-index:20000;background:rgba(245,247,251,.96);backdrop-filter:blur(12px);border-bottom:1px solid rgba(40,156,255,.1)}.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:72px}.logo{flex:0 0 auto}.logo img{max-height:48px;width:auto}.nav-wrap{flex:1 1 auto;min-width:0;display:flex;justify-content:center}.nav{display:flex;align-items:center;gap:20px;white-space:nowrap;flex-wrap:nowrap}.nav>a,.nav-trigger{position:relative;color:#4E5F7A;font-size:15px;padding:24px 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