:root{--c-text: #1a1d21;--c-text-2: #5b6270;--c-text-3: #6b7280;--c-bg: #ffffff;--c-bg-2: #f6f7f9;--c-bg-3: #eef0f4;--c-border: #e3e6eb;--c-brand: #185fa5;--c-brand-dark: #0c447c;--c-brand-bg: #eef4fb;--c-accent: #a32d2d;--c-green: #3b6d11;--c-radius: 10px;--c-radius-sm: 6px;--shadow: 0 1px 2px rgba(16, 24, 40, .04), 0 1px 3px rgba(16, 24, 40, .06);--maxw: 760px}*,*:before,*:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,PingFang SC,Hiragino Sans GB,Microsoft YaHei,Source Han Sans SC,Noto Sans CJK SC,sans-serif;font-size:16px;line-height:1.75;color:var(--c-text);background:var(--c-bg);-webkit-font-smoothing:antialiased;overflow-x:hidden;overflow-x:clip}a{color:var(--c-brand);text-decoration:none}a:hover{text-decoration:underline}img{max-width:100%;height:auto}.wrap{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 16px}.site-header{--header-h: 56px;border-bottom:1px solid 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