:root{--bg:#F4F7FA;--white:#fff;--soft:#EAF1F6;--mint:#E9F8F8;--navy:#102E46;--deep:#163C57;--teal:#13B8C5;--blue:#237BD3;--title:#18364B;--text:#344C60;--muted:#64798A;--border:#DCE6ED;--footer:#0B2539}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:32px}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.8 Arial,"PingFang SC","Microsoft YaHei",sans-serif;overflow-wrap:break-word}body.drawer-open{overflow:hidden}a{color:#176AAB;text-underline-offset:3px}a:hover{color:#0C536F}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--teal);outline-offset:3px}button{font:inherit}h1,h2,h3,p,figure{margin-top:0}h1,h2,h3{color:var(--title);line-height:1.38}h1{font-size:clamp(32px,3.2vw,36px);letter-spacing:-.02em}h2{font-size:clamp(23px,2.1vw,27px)}h3{font-size:19px}p{margin-bottom:1.15em}small{font-size:.78em}img{max-width:100%}.container{width:min(100% - 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